Abstract: A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

Abstract: A device and method for controlling the speed of a rolling door is disclosed. The door panel is controlled to accelerate or decelerate by means of the real-time rolling speed of the door panel, such that speed control is applicable to door panels of different specifications. When the real-time rolling speed of a door panel reaches a predetermined acceleration value, a control module actuates the driving module to speed up opening or closing of the door panel. When the real-time rolling speed of the door panel reaches a predetermined deceleration value, the control module controls the driving module to speed down opening or closing of the door panel; when the real-time rolling speed of the door panel is in between the acceleration value and the deceleration value, the control module actuates the driving module to maintain the opening or closing speed of the rolling door at current value.

Abstract: A device and method for controlling the speed of a rolling door is disclosed. The door panel is controlled to accelerate or decelerate by means of the real-time rolling speed of the door panel, such that speed control is applicable to door panels of different specifications. When the real-time rolling speed of a door panel reaches a predetermined acceleration value, a control module actuates the driving module to speed up opening or closing of the door panel. When the real-time rolling speed of the door panel reaches a predetermined deceleration value, the control module controls the driving module to speed down opening or closing of the door panel; when the real-time rolling speed of the door panel is in between the acceleration value and the deceleration value, the control module actuates the driving module to maintain the opening or closing speed of the rolling door at current value.

Abstract: This invention provides a door operator with a wireless setup function and a method for establishing a wireless communication of the door operator, including a wall-mounted device and an operator unit, wherein the wall-mounted device includes a setting switch, a microcontroller, a wireless transmission module and a memory unit; when the setting switch activates the wireless transmission module and is in connection with the external electronic device, the wireless transmission module receives setup information transmitted from the external electronic device in a wireless communication mode, and the microcontroller stores the setup information in the memory unit, and the operator unit is activated in accordance with the setup information. A user may configure/alter the various functions of the door operator easily. As the setting switch has to be turned on before commencing the setup, it prohibits unauthorized access to the door operator, and improves the security of the door operator.

Abstract: A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

Abstract: A direction switchable ratchet device for a door operator is provided. The door operator includes an electric motor, an electromagnetic brake and the direction switchable ratchet device. The direction switchable ratchet device comprises a first and second direction restricting devices and a manually operable mechanism. A drive shaft of the electric motor is braked by a brake baffle disk when the electric motor is electrically de-energized and is released when the electric motor is electrically energized. The first and second direction restricting devices are provided to prevent the drive shaft from being rotated clockwise and counter-clockwise respectively by holding the brake baffle disk. In the event of power failure, the manually operable mechanism is effective to open the door once a pawl of the direction restricting device at the free side is retracted. The manually operable mechanism of the door operator is prevented from being incorrectly mounted in a cost-effective manner.

Abstract: A door operator system capable of detecting a current-time position of a movable barrier comprises a current-time position detecting device comprising a first gear, a first angular position sensing unit, a revolution counting unit and an arithmetic unit. The first gear is coupled to an output shaft of a motor or a winding shaft. The first angular position sensing unit is provided for detecting a first angular position of the first gear. The revolution counting unit counts the number of revolutions of the first gear. The arithmetic unit calculates a number of total circumferential intervals of the output shaft of the motor or the winding shaft based on D=(La*X)+A/(360/X), where D is the number of the total circumferential intervals, La is the number of revolutions of the first gear, A is the first angular position, X is a number of circumferential intervals per revolution of the first gear.

Abstract: A rolling door operator comprises a rotary shaft, a centrifugal brake mechanism, and a unidirectional centrifugal mechanism, in which a latching tooth and plurality of slots are disposed around one end of the rotary shaft, and the unidirectional centrifugal mechanism includes an active pin with an axial latching face and a sliding face, the axial latching face being engaged with one of slots to latch the rotary shaft together only in the falling direction of a door curtain, and the sliding face having a bevel adjacent to the latching face to contact slidingly over the slots, so that the door curtain can be lifted up immediately in another direction, and without affecting normal opening function of the door curtain.

Abstract: Electronic apparatuses and adjustment methods thereof are provided. The electronic apparatus includes an input interface and a processor. The input interface is configured to receive a reference frame, wherein the reference frame corresponds to a plurality of luminance values. The processor is electrically connected to the input interface and configured to adjust at least a portion of the luminance values that are greater than a predetermined threshold, calculate a weighted luminance value of the reference frame according to the luminance values, generate a comparison result by comparing the weighted luminance value and a luminance target, and decide the luminance values according to the comparison result.

Abstract: Electronic apparatuses and adjustment methods thereof are provided. The electronic apparatus includes a camera module and a processor. The camera module is enabled into an HDR mode and captures a reference frame according to a first exposure setting, wherein the reference frame corresponds to a plurality of luminance values. The processor calculates a weighted luminance value of the reference frame according to the luminance values, generates a comparison result by comparing the weighted luminance value and a luminance target of the HDR mode, and decides a second exposure setting according to the comparison result.

Abstract: A door curtain anti-dropping device comprises at least one rotating shaft, a brake mechanism, a rotational speed detecting module, and a control circuit, the rotating shaft being coupled to the winding shaft, the brake mechanism being used to brake the rotating shaft, the rotational speed detecting module being used to detect the rotational speed of the rotating shaft. When the door operator drives the winding shaft to rotate, the control circuit controls the brake mechanism to release the brake and to drive the rotating shaft and winding shaft. Once the chain is broken, an abnormal rotational speed of the winding shaft is detected by the rotational speed detecting module, the control circuit switches off the power source immediately to make the brake mechanism lock the winding shaft.

Abstract: A detector and a method for detecting IQ swap are provided. The detector includes a first correlator, a second correlator and a comparator. The first correlator calculates a first correlation value between a received symbol stream and a first conjugated symbol stream. The received symbol stream is generated by a transmission of a known symbol stream through a transmission channel. The first conjugated symbol stream is conjugate complex of the known symbol stream. The second correlator calculates a second correlation value between the first conjugated symbol stream and a second conjugated symbol stream. The second conjugated symbol stream is conjugate complex of the received symbol stream. In accordance with a relationship between the first and second correlation values, the comparator determines whether an in-phase component and a quadrature component in the received symbol stream have been swapped.

Abstract: A cylinder type door operator is provided. The door operator is disposed in a hollow winding shaft pivotally provided in a winding shaft box for moving a movable barrier. The door operator comprises: a tubular housing, an electric motor, an output shaft, an electromagnetic brake, and a centrifugal brake. The electric motor is accommodated in the tubular housing. The tubular housing has one end inserted into the winding shaft and the other end secured to the winding shaft box. The output shaft has one end coupled to the drive shaft and the other end protruded out of the tubular housing and secured to the winding shaft. The electromagnetic brake is provided for braking the drive shaft. The centrifugal brake is provided for limiting the rotational speed of the drive shaft.

Abstract: A door operator system capable of detecting a current-time position of a movable barrier comprises a current-time position detecting device comprising a first gear, a first angular position sensing unit, a revolution counting unit and an arithmetic unit. The first gear is coupled to an output shaft of a motor or a winding shaft. The first angular position sensing unit is provided for detecting a first angular position of the first gear. The revolution counting unit counts the number of revolutions of the first gear. The arithmetic unit calculates a number of total circumferential intervals of the output shaft of the motor or the winding shaft based on D=(La*X)+A/(360/X), where D is the number of the total circumferential intervals, La is the number of revolutions of the first gear, A is the first angular position, X is a number of circumferential intervals per revolution of the first gear.

Abstract: A signal receiving system, a band detection method for a multi-carrier signal and a demodulating apparatus thereof. Each carrier of the multi-carrier signal has a plurality of symbols respectively corresponding to a plurality of time. The band detection method includes: defining a scan area range according to a full band range of the multi-carrier signal; obtaining a reference symbol corresponding to each of the symbols according to time and frequency offset values in the scan area range; performing an operation on each of the symbols and corresponding reference symbol to obtain calibration information of each carrier of the multi-carrier signal; tuning the full band range of the multi-carrier signal according to the calibration information thereof.

Abstract: A device and a method for detecting a guard interval (GI) of an orthogonal frequency division multiplexing (OFDM) signal are provided. The device includes a signal transforming unit and a GI determining unit. The signal transforming unit receives the OFDM signal and sets a predetermination GI to provide a first frequency-domain symbol and a second frequency-domain symbol. The GI determining unit receives the predetermination GI, the first frequency-domain symbol and the second frequency-domain symbol to determine a phase difference between the first frequency-domain symbol and the second frequency-domain symbol and determines the GI of the OFDM signal according to the phase difference.

Abstract: Electronic apparatuses and adjustment methods thereof are provided. The electronic apparatus includes an input interface and a processor. The input interface is configured to receive a reference frame, wherein the reference frame corresponds to a plurality of luminance values. The processor is electrically connected to the input interface and configured to adjust at least a portion of the luminance values that are greater than a predetermined threshold, calculate a weighted luminance value of the reference frame according to the luminance values, generate a comparison result by comparing the weighted luminance value and a luminance target, and decide the luminance values according to the comparison result.

Abstract: A door machine mechanism for a rolling door has an electric machine mechanism, a brake mechanism and an output mechanism. In normal power supply condition, the rolling door is opened by the electric machine mechanism. In case of fire, the brake mechanism releases brake so that the rolling door moves downward by its own weight. However, in an emergency condition, if an external force is applied to push the door upward, the rolling door will be reopened by an assistance of spare electricity to the electric machine mechanism.

Abstract: Electronic apparatuses and adjustment methods thereof are provided. The electronic apparatus includes a camera module and a processor. The camera module is enabled into an HDR mode and captures a reference frame according to a first exposure setting, wherein the reference frame corresponds to a plurality of luminance values. The processor calculates a weighted luminance value of the reference frame according to the luminance values, generates a comparison result by comparing the weighted luminance value and a luminance target of the HDR mode, and decides a second exposure setting according to the comparison result.

Abstract: A method, suitable for an electronic apparatus with a first camera and a second camera, is disclosed for detecting whether the second camera is blocked accidentally. The method includes following steps. A first image is sensed by the first camera and a second image is sensed by the second camera simultaneously. A first brightness evaluation result is generated from the first image and a second brightness evaluation result is generated from the second image. Whether the second camera is blocked or not is determined according to a comparison between the first brightness evaluation result and the second brightness evaluation result.