Abstract: This invention discloses an electronic control system for an Industrial Motor Operator that uses standard steady state logic to improve reliability in rough service wet and dirty environments. It includes means of providing electronic snow limit to close limit sensing removing the need for two switches and radically improving its accuracy. A low voltage switch reverses the high voltage motor wires and at the same time reverses the open limit, close limit, and snow limit sensors mechanical positions. It discloses a system using lamps to indicate that the power wiring is connecting to three-phase motors in the correct sequence or that single-phase motors have their windings correctly phased.

Abstract: A scanning operation is synchronized with the motion of a scan mechanism. Encoder signals indicative of a position of the scan mechanism relative to a scan platen or an object being scanned are received. These encoder signals may include a single channel phase signals are channel A and channel B phase signals. Transitions of the encoder signals are detected. Scan pulses for triggering a scan operation by a scan element are generated based on transitions of the encoder signals. Differences in the encoder signal resolution and a desired scan resolution are compensated for in the generation of the scan pulses. A transfer signal is generated in synchronization with the scan pulses for controlling output of data from the scan element. Variations of the velocity of the scan mechanism cause variations of the frequency at which the scan pulses are generated.

Abstract: The invader detector has a fixing portion attached and fixed within a vehicle, a sensor containing portion for enclosing an ultrasonic sensor for detecting an invader into the vehicle, and an angular displacement shaft for angularly displacing the sensor containing portion. The sensor containing portion can be driven to a detection position for detecting the invader into the vehicle or a storage position.

Abstract: Arrangement and method for controlling a component in a vehicle in which at least one morphological characteristic of an occupant is measured and a current position of at least a part of a seat on which the occupant is situated is obtained. The component is controlled based on the measured morphological characteristic(s) and the current position of the seat. The component may be an occupant restraint device, such as an airbag whose inflation, deflation and/or deployment direction is/are controlled.

Abstract: Apparatus and method for adjusting a steering wheel extending from a front console of a vehicle in which at least one motor is coupled to the steering column or steering wheel and is at least automatically controllable without manual intervention to adjust the steering wheel relative to the front console. A system determines at least one morphological characteristic of a driver and a control circuit is coupled to the system and the motor(s) for automatically controlling the motor(s) based on the morphological characteristic(s). In this manner, the position of the steering wheel can be adjusted for each driver and can be changed when the driver of the vehicle varies between sequential uses.

Abstract: A method for controlling operations of power seats for a vehicle, comprises the steps of moving a first seat toward a second seat by a first reversible motor, causing a seat cushion of the first seat to be tipped up, by a second reversible motor, relative to a seat back of the first seat which stands up, sensing loads which are applied to the first and second reversible motors, once stopping the driving of the first reversible motor, when excessive load of the first reversible motor is sensed during the movement of the first seat toward the second seat, thereafter returning the first seat to a position at which the excessive load of the first reversible motor is not sensed and stopping the movement of the first seat, once stopping the tipping-up of the seat cushion, when excessive load of the second reversible motor is sensed during the tipping-up of the seat cushion, and thereafter returning the seat cushion to an original posture thereof and stopping the movement of the seat cushion.

Abstract: A non-contact obstacle detection system utilizing ultra sensitive capacitive techniques. In an exemplary embodiment, the system includes a sensing element disposed in proximity to a moveable panel and a proximity detection circuit in communication with the sensing element. The proximity detection circuit generates a differential output signal reflective of whether a foreign object is in proximity to the sensing element. In addition, a central control module is in communication with the sensing element. The central control module determines whether the differential output signal is reflective of a foreign object in proximity to the sensing element. If the central control module determines that the differential output signal is reflective of a foreign object in proximity to the sensing element, and the moveable panel is moving toward a closed position, then the central control module generates a control output signal to stop the moveable panel from moving toward the closed position.

Abstract: A controller controls the automatic positioning of an antenna. The controller is arranged to position the antenna dependent upon a channel selected by a user, a location of a receiver tuned to the selected channel, and a location of a source of a signal associated with the selected channel.

Abstract: A powered panel control apparatus and method using an electric motor with a rotatable armature. The control generates time periods for a predetermined amount of angular rotation of the motor armature during one complete rotation. An average time period is computed over a predetermined number of time periods and compared with a threshold time period to determine if an obstacle is present in the path of movement of the panel. Transient counts are accumulated for increasing average time periods over a number of time period samples to detect an obstacle. A threshold for normal noise variations is adjusted upon detection of a rough road condition to compensate for the effect of rough road conditions on the powered panel control apparatus.

Abstract: A vehicle seat includes a seat movable along a path a motor for driving the seat on the path, a sensor generating a signal indicating movement of the seat on the path, and a controller operating the motor to move said seat along the path. The sensor is preferably a Hall-effect device or a potentiometer. The controller is in communication with the sensor to receive the signal and form a feed-back control loop. The controller accelerates the seat at a controlled rate of acceleration to a controlled constant speed and decelerates the seat from the constant speed at a controlled rate of deceleration. The controller controls the rate of acceleration of the seat at a stored predetermined rate of acceleration by adjusting operation of the motor to maintain the predetermined rate of acceleration.

Abstract: A method of operation for a motor-driven worm gear actuator coupled to a load device energizes the motor in a series of pulses during an initial period of motor operation when reversal of the motor is commanded. The pulsed energization produces a slow initial axial movement of the motor armature without moving the load device, minimizing the contact force between the armature shaft and a mechanical end stop of the motor. Rotation of the motor is determined by identifying and counting motor current pulses due to commutation, and the pulse count is adjusted at each reversal of motor rotation to compensate for motor current pulses due to the pulsed energization.

Abstract: The invention relates to a process for adjusting a motor vehicle part between at least two positions, the motor vehicle part being driven by an electric motor, pulse signals being generated according to the rotary motion of the electric motor and being supplied to a control unit for controlling the electric motor, in the first computation (50) with a first parameter set the first value for the instantaneous force acting on the motor vehicle part is determined from the acquired pulse signals at certain first instants. Parallel to the first computation, in at least the second computation (52) with a second parameter set which differs from the first parameter set the second value for the instantaneous force acting on the motor vehicle part is determined from the acquired pulse signals at certain second instants, the two values being considered for the instantaneous action of the force in order to decide whether the electric motor is turned off or reversed or not.

Abstract: Process for determination of the position of a door, window or roof of an automobile vehicle, according to which the angular position of the rotor of the electric motor actuating this door, window or roof is determined and the position of the door, window or roof is calculated as a function of the said angular position. The position of the door, window or roof is calculated by correcting a theoretical position that depends on the angular position by a term that takes account of the stiffness of the mechanical transmission between the door, window or roof and the electric motor, this term being a function of the motor power supply current. The device embodying this process is advantageously used in an electric window winder.

Abstract: The invention relates to a process for adjusting a motor vehicle part between at least two positions and a drive device for executing this process. The motor vehicle part is driven by an electric motor, and a pulse signal is generated according to the rotary motion of the electric motor which is supplied to a control unit for controlling the electric motor, in which at certain instants the value for the current force acting on the motor vehicle part is determined from the pulse signal. This value of the force is used as the criteria in the decision whether the electric motor is to be turned off or reversed [or not]. Before connection of the electric motor to the motor vehicle part measurements are taken on the electric motor for determining the individual motor characteristics, the measured values determined in this way are used in the determination of the value of the action of force.

Abstract: A opening and closing control device for a cover provided at an opening includes an electric motor for actuating the cover to open and close the opening, at least two rotational number sensors for generating pulse signals which have different phases from one another based on a rotational number of the electric motor, and a position detector for detecting the position of the cover based on one of the pulse signals and for judging a moving direction of the cover in accordance with a signal level of one of the rotational number sensors when the other rotational number sensor detects an edge of the pulse signal.

Abstract: A power window control apparatus for controlling vehicle power windows (12-18) includes window control switches (52-58) for controlling power window control motors (20-26). When two window control switches (52-58) are simultaneously and momentarily actuated downward, a controller (40) controls the motors (20-26) to lower the windows (12-18) to a predetermined position from an initially closed position. In the event that one or more windows are initially open, the controller (40) lowers the windows for the time interval that the two window control switches are actuated downward. When the two window control switches (52-58) are moved in the upward direction, the controller (40) simultaneously controls all the motors (20-26) to raise all open windows (12-18) to a fully closed position.

Abstract: An object detection system includes a sensor in communication with a controller which identifies contact with the sensor. In a preferred embodiment the sensor is a piezo film which generates a signal when an object applies a predetermined force to the edge of the moveable glass member. This signal is identifiable by the controller in communication with the piezo film. Another embodiment of the sensor provides a pair of substantially parallel segments of conductive material applied along the edge of the window. When an object is in contact with both segments of conductive material an electrical signal is conducted and identified by the controller. When the controller determines an object is in contact with the sensor and therefore the moveable glass member, the controller halts or reverses the movement of the moveable glass member to prevent trapping the object between the closing moveable glass member and the frame.

Abstract: In a closing device, in particular for a motor vehicle window or sunroof, having a drive motor (4) for pushing a closing element such as a window pane or roof panel across an opening to be closed, a sensor (3) for detecting a force acting on the closing element in the opposite direction to the direction of closing, and a control circuit (1) for monitoring the force and interrupting the closing element's closing movement if the sensor (3) detects that the force exceeds a limit value, the control circuit (1) varies the limit value depending on force measured at an earlier point in time. As a result, it is possible to distinguish between disruptive influences on the closing device, in particular external acceleration forces acting on the closing element, from forces arising as a result of a body part being trapped in the opening, reversing of the closing device only being permitted in the latter instance.

Abstract: Method of detecting obstructions encountered by a motorized door. The method includes providing a signal processor with one or more signals indicative of a predetermined door trajectory profile for at least a segment of a stroke of the door, the door trajectory profile providing an ideal speed and/or position versus an elapsed time since a beginning of the segment of the stroke. A door position signal from a position encoder for the door is received into the signal processor. The method includes generating one or more signals indicative of the velocity and/or position of the door from the door position signal and generating a trajectory discrepancy signal based on the velocity and/or position in relation to the ideal speed and/or position. A motor control signal is generated based on the trajectory discrepancy signal and the motor control signal is connected to motor control circuits connected to drive the motor for the door.

Abstract: Method of controlling a motorized door by offloading the burden to a separate motion control processor. The method includes generating, in a central processor for the door, one or more signals indicative of a predetermined door speed profile for a stroke of the door. The predetermined door speed profile provides an ideal velocity versus an elapsed time since a beginning of the stroke. The signals are communicated to a motion control processor and the motion control processor also receives door position signals from a position encoder. The motion control processor generates signals indicative of the velocity of the door based on the door position signals and it generates error signals based on discrepancies between the velocity of the door and the ideal velocity. It generates motor control signals based on the error signals and the motor control signals are communicated to the motor of the door.

Abstract: An apparatus mounted in a vehicle having a door, a door detecting means, a driving detecting means, and a door control means. The door has an open position and a closed position. The door detecting means detects a condition of the door, and the driving detecting means detects a driving condition of the vehicle, that is whether the vehicle is running or stops. The control means controls the door to close and controls to announce that the door is closing, when the door is open and the vehicle is running. On the other hand, when the door is closed and the vehicle is running, the door is prevented from opening and “the door is prevented from opening” is announced. Since a clearance between the door and other parts caused by vibrations of the apparatus during running does not increase, a durability of the apparatus is high.

Abstract: Disclosed is an improved system and method for sensing both hard and soft obstructions for a movable panel such as a sunroof. A dual detection scheme is employing that includes an optical sensing as the primary means and electronic sensing of motor current as a secondary means. The secondary means utilizes system empirical precharacterization, fast processing algorithms, motor parameter monitoring including both current sensing and sensorless electronic motor current commutation pulse sensing, and controller memory, to adaptively modify electronic obstacle detection thresholds in real time without the use of templates and cycle averaging techniques.

Abstract: An operator for opening and closing movable barriers such as garage doors comprising a pass-point limit system which is a component of an operating head. An operator for a rolling shutter or gate can be installed on either side of the opening. A dual pass-point system provides a unique pass-point regardless of direction of mounting the operator, regardless of the direction of travel for opening the barrier, and regardless of installation configuration, eliminating the need for the installer to know which direction the motor is rotating or the barrier is travelling.

Abstract: The present invention discloses a novel method and apparatus for determining the position of a window glass in an aperture window as between one of two or more regions. Further, the present invention discloses a method and apparatus for determining the direction of travel of a window. The present invention senses the position and direction of travel of a window by measuring the amount of current in a motor that is suitable for moving the window as the window passes one or more elastic objects.

Abstract: Methods for classifying and ascertaining the identity of an object in a seat in a vehicle in which a wave-receiving sensor receives waves at least from a space above the seat and generates a signal representative of the received waves and a weight sensing system obtains information about the weight being applied to the seat. Tests are conducted on different objects, each test entailing receiving waves by means of the wave-receiving sensor and the information about the weight being applied to the seat from the weight sensing system while that object is situated in the seat and associating the signal representative of the received waves and information about the weight being applied to the seat with that object. An algorithm is generated from the tests and adapted to process a signal representative of waves received by the wave-receiving sensor and information about the weight being applied to the seat from the weight sensing system and classify or identify the object most closely associated therewith.

Abstract: A sunroof controlling device for controlling a sunroof lid in sliding and tilting directions without using a mechanical position switch, which is possible to automatically reset count value of the position counter of the sunroof lid according to an appearance of the error in the count value and comprises first and second switches, an actuator having an electric motor and an output shaft to be connected with the sunroof lid, and a control unit including first and second rotation signal generating means for generating first and second signals in response to rotation of an armature shaft of the electric motor, an output shaft rotation signal generating means and a roof position counting means for counting the signals generated from the first, second and output shaft rotation signal generating means, and the control unit executes an initial mode for resetting count value of the roof position counter when the count value is not a predetermined range.

Abstract: A control device for a movable member includes a DC motor for establishing position transfer of the movable member in such a manner that after a first position of the movable member is stored in a memory, even if the movable member is at a second position, the moving member is returned to the first position only upon manipulating a switch and a motor pulse generating circuit generates a cut-off frequency which is variable depending on a ripple pulse frequency which is indicative of a rotational number of the motor.

Abstract: A sensor which is installed in a vehicle, for sensing an object or a person, is operated for adjustment purposes in a test mode. The installation position of the sensor or of the device in the vehicle is changed with an adjustment device as a function of the evaluation of the test data which are determined. Alternatively, or in addition, a message can be issued as a function of the result of the evaluation. The invention ensures that the device is installed at a precise location in the vehicle and the position of vehicle occupants is thus determined precisely.

Abstract: A movable barrier operator includes a wall control switch module having a learn switch thereon. The switch module is connectable to a control unit positioned in a head of a garage movable barrier operator. The head unit also contains an electric motor which is connected to a transmission for opening and closing a movable barrier such as a garage door. The switch module includes a plurality of switches coupled to capacitors which, when closed, have varying charge and discharge times to enable which switch has been closed. The control unit includes an automatic force incrementing system for adjusting the maximal opening and closing force to be placed upon the movable barrier during a learn operation. Likewise, end of travel limits pan also be set during a learn operation upon installation of the unit.

Abstract: A fully automated telescope system is able to be fully operable in both Alt-Az and polar configurations. In either configuration, the telescope aligns itself to be celestial coordinate system following a simplified initialization procedure during which the telescope tube is first pointed north and then pointed towards a user's horizon. A command processor, under application software program control orients the telescope system with respect to the celestial coordinate system given the initial directional inputs. The initial telescope orientation may be further refined by initially inputting a geographical location indicia, or by shooting one or two additional celestial objects. Once the telescope's orientation with respect to the celestial coordinate system is established, the telescope system will automatically move to and track any desired celestial object without further alignment invention by a user.

Abstract: A sunroof controlling device for controlling a sunroof lid in sliding and tilting directions without using a mechanical position switch, which comprises and actuator having an electric motor and an output shaft to be connected with the sunroof lid, a switch for generating a command signal, and a control unit including an armature shaft rotation signal generating means, an output shaft rotation signal generating means, and a counting means for counting the signals generated from the armature shaft rotation signal generating means and the output shaft rotation signal generating means, and the control unit starts current supply to the electric motor of the actuator in response to the command signal and interrupts the current supply according to the count value of the counting means.

Abstract: This invention relates to a system and method for monitoring and controlling the operation of a motorized convertible top such that it may be extended and retracted automatically. The system and method of the present invention monitors the movement of the various components to provide fluid, simultaneous motion. It further detects and corrects improper alignments that may result in damage to the top due to overlapping elements or binding elements, and stores error information useful in diagnosing and repairing unrecoverable errors.

Abstract: Apparatus and method for ascertaining the identity of an object in a seat in a passenger compartment of a vehicle in which a wave-receiving sensor receives waves from a space above the seat and generates an output representative thereof, the weight applied onto the seat is measured and an output representative thereof is generated and the outputs representative of the received waves and measured weight are processed in order to evaluate the seated-state of the seat based and determine whether the seat is occupied by an object and when the seat is occupied by an object, to ascertain the identity of the object in the seat. In apparatus and method for adjusting a component, the identity of the object is first ascertained and then the component is adjusted based thereon.

Abstract: This invention relates to a system and method for monitoring and controlling the operation of a motorized convertible top such that it may be extended and retracted automatically. The system and method of the present invention monitors the movement of the various components to provide fluid, simultaneous motion. It further detects and corrects improper alignments that may result in damage to the top due to overlapping elements or binding elements, and stores error information useful in diagnosing and repairing unrecoverable errors.

Abstract: An actuator is operated to move a mechanical device between two extreme positions of travel. While that motion is occurring, the system quantifies the amount of movement that occurs between those positions. The quantification may involve counting the number of steps of a stepper motor. The number of steps may be used directly as a quantification. Alternatively, the number of steps can be multiplied by the time period of each step to derive the time of the movement between the extreme positions. In addition to being used to setup the actuator upon installation, this automatic ranging method can be performed periodically to compensate for effects of wear on the mechanical device.

Abstract: A vehicle seat is disclosed including a seat cushion and a seat back. The vehicle seat includes a plurality of electronic devices secured to both the seat cushion and the seat back. These electronic devices allow the occupant of the vehicle seat to control the features of the vehicle seat that are electronically modified, i.e., position, orientation, temperature, and the activation of lumbar support and/or massage devices, if any. The vehicle seat also includes a plurality of sensors associated with each of the electronic devices. Each of the sensors determines the condition or status of the electronic device to which the sensor is associated. At least one serial bus connects all of the electronic devices and sensors to a single control unit that receives all of the data from the sensors and, depending on the instructions input by the occupant of the vehicle seat, controls the electronic devices. The control unit can be integrated into the occupant position switch assembly.

Abstract: In a displacement drive that provides an obstruction prevention function for movable parts, in particular such as windows and sunroofs in motor vehicles, a decrease in the rotation speed or velocity of the drive is provided in order to achieve a predefined spring rate in specific displacement ranges so as to lower the kinetic energy. Within the predefined range before the closed position is reached, the rotation speed and/or the output of the drive is reduced linearly. The reduction to a minimum rotation speed or minimum output takes place within a specific position range. The minimum rotation speed or minimum output is reached at a specific position before the closed position and is substantially constant. Corresponding to different supply output levels, a linear reduction, for example, is performed along lines of different slopes, the length of the specific position range in which the reduction is performed being constant.

Abstract: An automatic door operator with a motor connectable to a door through gear units and linkages and for moving the door between an open and a closed position. An absolute position transducer measures the absolute position of the door independently of previous positions of the door and substantially continuously. A control senses an external signal indicating one of a desired open state and closed state of the door. The control compares the absolute position of the door with the external signal and generates the drive signal to drive the motor to cause the absolute position to be substantially identical to the external signal. The motor is a regenerative drive operatable in all directional combinations of electrical driving torque and motor rotation. The control electrically drives the regenerative drive in a direction opposite a rotation of the regenerative drive to brake a load applied to the motor. The control also limits the current to the motor, to limit the force the motor applies to the door.

Abstract: The invention relates to a circuit for controlling an electrically activated motor vehicle door lock or the like, with a lock latch (1) and a detent pawl (2) which keeps the lock latch (1) in the closed position and with an electric motorized auxiliary closing drive (4) which is turned on after the lock latch (1) has reached a preclosing position and then moves the lock latch (1) by motor into the main closing position, there being a switch (16) which recognizes the preclosing position, especially a lock latch switch which scans the position of the lock latch (1).

Abstract: In a method of detecting a foreign matter caught by a window in a power window device which includes a window opening/closing motor, a motor drive unit, a pulse generator for generating pulses corresponding to the rotation of the motor, an MCU for executing overall control and drive processing and manually-operated switch unit, the MCU detects a parameter value indicating a motor load imposed on a window when the window is opened and closed through the motor drive unit, compares the parameter value with a preset reference median, determines that a foreign matter is caught by the window when the parameter value falls outside the reference median in a considerable amount and stops the drive of the motor or reverses the motor, wherein the reference median that is preset in the range where a foreign matter is detected within the entire moving region of the window is successively changed stepwise by the same displacement value.

Abstract: An operator for opening and closing movable barriers such as garage doors comprising a pass-point limit system which is a component of an operating head. An operator for a rolling shutter or gate can be installed on either side of the opening. A dual pass-point system provides a unique pass-point regardless of direction of mounting the operator, regardless of the direction of travel for opening the barrier, and regardless of installation configuration, eliminating the need for the installer to know which direction the motor is rotating or the barrier is travelling. The operator automatically learns both the open and close limits, regardless of direction of travel and without having to press a learn switch to set the open and close limits.

Abstract: An electric driving device which rotates a visor with respect to a stay, and includes a visor side ring having an inclined surface and a stay side ring having an inclined surface. When the visor is rotated from a using position to a housing position, the inclined surfaces ride on each other to securely form a predetermined gap between the stay and the visor. Meanwhile, when the visor is rotated from the housing position to the using position, the inclined surfaces slide down each other so that the gap between the stay and the visor approaches zero.

Abstract: A movable barrier operator includes a wall control switch module having a learn switch thereon. The switch module is connectable to a control unit positioned in a head of a garage movable barrier operator. The head unit also contains an electric motor which is connected to a transmission for opening and closing a movable barrier such as a garage door. The switch module includes a plurality of switches coupled to capacitors which, when closed, have varying charge and discharge times to enable which switch has been closed. The control unit includes an automatic force incrementing system for adjusting the maximal opening and closing force to be placed upon the movable barrier during a learn operation. Likewise, end of travel limits can also be set during a learn operation upon installation of the unit.

Abstract: An electric motor drive for an automotive operating element for moving between at least two end positions. A range about at least one selected position of the operating element is established. The drive automatically moves the operating element into the selected position when the automotive operating element has reached the established range.

Abstract: An automatic sliding door apparatus has a speed-change detecting element for detecting a change in the driving speed of a slide motor above a predetermined value as well as a pressure sensitive sensor disposed in a front end portion of a door panel, and the detecting of a foreign object is effected by the pressure sensitive sensor in regions other than a region in which the door panel slides at a fixed speed. Accordingly, the detecting of a foreign object is made possible in a region where the detecting of a foreign object is difficult in the detection of a change in speed by the speed-change detecting element.

Abstract: A seat adjustment apparatus for adjusting a seat in a passenger compartment of a vehicle including wave sensors for transmitting waves into the passenger compartment toward the seat, receiving reflected waves from the passenger compartment and generating an output representative of the reflected waves received by the wave sensors, weight sensors associated with the seat for measuring the weight applied onto the seat and generating an output representative of the measured weight applied onto the seat and a processor for receiving the outputs from the wave sensors and the weight sensors and evaluating the seated-state of the seat based thereon. The processor directs a control unit to cause a portion of the seat to move based on the evaluation of the seated-state of the seat.

Abstract: In an opening/closing member driving method in which the rotation of a motor rotatable in two directions is transmitted through a transmission member to an opening/closing member to thereby drive a baffle 4 in an opening direction A and in a closing direction B, when driving the transmission member from an intermediate position to an original position which is set at a position where the transmission member is moved to the full in one direction or in the other direction, the transmission member is once driven in the opposite direction to the original position and is stopped at such opposite position or in the neighborhood of the opposite position and, after then, the transmission member is driven in the original position direction by an amount equivalent to the normal movement thereof and is thereby returned to the original position.

Abstract: A system and device for insuring the integrity of an automatic door has a sensor to determine the status of the door with respect to a predetermined position and a programable actuator which provides a positive signal for automatically moving the door to the predetermined position when the programmable actuator is activated and the sensor indicates that the door is at other than the predetermined position. Preferably the programmable actuator is a timer and the predetermined position is closed. The timer can be remotely programmable. The actuator can also be triggered by a sensor of an event such as darkness.

Abstract: An electrical power efficiency of the driving circuit is improved. The OP amplifier in the control arithmetic circuit compares a controlling amount with an added value of a target value and an AC signal and then outputs the comparing signal to the driving circuit. Since the transistor in the driving circuit is controlled in switching by the comparing signal, its loss of electrical power is reduced. Accordingly, an electrical power efficiency of the driving circuit is improved. In addition, the driving circuit drives the actuator section, a controlling amount of the actuator is detected by the position sensing unit and it is fed back as the controlling amount to the controlling arithmetic circuit.

Abstract: A object sensor system for a swing door includes swing-side and approach-side sensors. Each of the sensors includes light-emitters and light-receivers which are mounted on a swing door. The light-emitters emit light toward a floor, and the light-receivers receive the light as reflected from the floor. The light emitted and received provides an object sensing zone which has a rectangular shape on the floor having a width equal to or larger than the width of the door. The sensing zone includes a main sensing area closer to the door and an auxiliary sensing area extending along the main sensing area. The auxiliary sensing area is disabled when the door moves.