Abstract: The present invention relates to circuits configured for implementation in sensors, sensors employing such circuits, and methods of operating and manufacturing such sensors and/or circuits. In at least some embodiments, the circuit includes a capacitor having a first input terminal and a first output terminal, a first amplifier having second and third input terminals and a second output terminal, and a second amplifier having fourth and fifth input terminals and a third output terminal. The first output terminal of the capacitor is coupled at least indirectly to the second input terminal, the fourth input terminal, and the third output terminal. Additionally, the second amplifier provides feedback current with respect to the capacitor depending upon signals provided to the fourth and fifth input terminals. The capacitor and each of the amplifiers can be implemented on an integrated circuit without any need for external components.

Abstract: A gain controllable wide-band low noise amplifier includes a first transistor coupled to an input node and an output node and amplifying an input signal to generate an output signal, a second transistor allowing the output signal to feedback to the input node, and a control circuit complementarily controlling transconductance of the first and second transistors.

Abstract: The circuit for controlling the oscillation frequency of an oscillation loop (66) has among others the following components—a first tunable capacitor unit (80) for providing a selectable amount of capacitance to the oscillator loop in accordance with a stored setting, and for controlling the oscillation frequency of the oscillator loop, and—a volatile storage unit (84) adaptated to store the setting of the tunable capacitor unit. The circuit further comprises a supply line (52) to the volatile storage unit and at least one other supply line (44) for the other components of said circuit. The supply line to the volatile storage unit is independent of said at least one other supply line, so that the volatile storage unit can be powered independently of other components of said circuit.

Abstract: In a communication semiconductor integrated circuit device using offset PLL architectures and including an oscillator circuit and a frequency divider circuit generating an intermediate frequency signal, the oscillator circuit includes an oscillator, a programmable frequency divider which frequency-divides the oscillation signal in accordance with frequency division information, a phase comparator detecting a phase difference between an output signal of the programmable frequency divider and a reference signal, and a frequency control unit for outputting a signal indicative of the phase difference and controlling the oscillation frequency of the oscillator, wherein a frequency division ratio generator circuit generates an integer part I and a fraction part F/G based on band information concerning the use frequency band and mode information along with channel information and for producing the frequency division ratio information to thereby give it to the programmable frequency divider.

Abstract: A sigma-delta fractional-N phase locked loop has faster lock time with increased charge pump current and decreased loop filter resistance in the unlock state. On the other hand, the sigma-delta fractional-N phase locked loop has lower noise susceptibility and lower frequency error with gradual decrease in charge pump current and gradual increase in loop filter resistance, in the lock state.

Abstract: A harmonic oscillator comprises a transmission line resonator in which an oscillation frequency depends on an electrical length of a transmission line and both ends of the transmission line are electrical open ends; an active element for oscillation as a negative resistance connecting to the transmission line resonator; an output line connected to a midpoint portion of the transmission line resonator; and electrical and/or physical suppressing means for suppressing a voltage displacement distribution of second harmonic among the even-order harmonics. The suppressing means is provided at a position which is at least a minimum voltage displacement portion for the second harmonic between the midpoint portion and either ends of the transmission line resonator.

Abstract: There are provided relaxation oscillators and methods for controlling the same. A relaxation oscillator includes a load device, a switching device, a fine-tuning varactor, and a current source. The load device is configured to provide a variable oscillator output based on a variable input reference voltage. The switching device is connected in signal communication with the load device and is configured to become active and inactive based on the variable oscillator output. The fine-tuning varactor is connected in signal communication with the switching device and is configured to provide fine-tuning of the variable oscillator output when the switching device is active. The current source is connected in signal communication with the switching device and is configured to provide coarse-tuning of the variable oscillator output when the switching device is active.

Abstract: A microcomputer includes an oscillator for generating a clock signal having a frequency by using a CR circuit, a multiplier for outputting the clock signal having a multiplied frequency relative to the frequency generated by the oscillator based on data from an external source, a temperature detection unit for detecting temperature at a proximity of the CR circuit, a storage unit for storing data that enables the multiplied frequency of the clock signal in an output from the multiplier to have a constant value based on a temperature-dependent oscillation characteristic of the oscillator, and a control unit for setting a multiplication value for generating the multiplied frequency of the clock signal to the multiplier based on the data in the storage unit that is correlated to the temperature detected by the temperature detection unit.

Abstract: A varactor diode alternative circuit having at least three varactor diodes that are in each case connected in series alternatingly opposite to one another and a resistor network and/or inductor network, which has the effect that at each of the varactor diodes, a control voltage supplied to the circuit for adjusting the capacitance is present at least approximately at full extent, and an alternating voltage that is applied at the series connection of the varactor diodes, which is at a higher frequency compared to the control voltage, is distributed preferably at least approximately uniformly to the varacter diodes.

Abstract: To minimize abrupt changes in modulated signal amplitude when switching between modulation types in a multi-modulation system, a “smoothing” circuit is used. When the modulation type is changed in a multi-slot modulation, the last symbol of the previous slot is overwritten and modulation is controlled by a smoothing circuit during the time of the final symbol of the previous slot to effect the trajectory smoothing. The IQ-plane is divided into two (or more) zones, each with an associated safe point. After the next-to-last symbol is modulated, modulation is made to jump to the safe point associated with the zone and modulation continues to a starting point. From the starting point, the next slot can be modulated using the new modulation type.

Abstract: Multi-phase clocks are used to encode and decode signals that are phase-modulated. The input signal is phase-compared with a feedback clock. Phase differences increment or decrement an up/down counter. The count value from the up/down counter is applied to a phase rotator, which selects one clock phase from a bank of multi-phase clocks. The multi-phase clocks have the same frequency, but are offset in phase from each other. An output divider divides the selected multi-phase clock to generate a phase-modulated output. A feedback divider divides a fixed-phase clock from the multi-phase clocks to generate the feedback clock. An analog or a digital front-end may be used to convert analog inputs to digital signals to increment or decrement the counter, or to encode multiple digital bits as phase assignments. For a de-modulator, a digital-to-analog converter (DAC) or a digital decoder produces the final output from the count of the up/down counter.

Abstract: A coaxial characteristic-impedance transformer for dividing RF power on a first terminal onto n second terminals situated in the same radial plane by multi-stage serial transformation via ?/4 lines is provided with a short overall size, where the ?/4 lines between the first connection and the second connections are at least partly disposed to surround each other concentrically.

Abstract: In the field of thin-layered superconductors, particularly those having tunable or adjustable characteristics, a method for the production of such components is provided, in addition to devices including such components. In such a device, is a stack of thin layers alternately consisting of an electrically insulating material and a superconductor material, and turning structure resulting in a resistive link between at least two of the superconductor layers. The inductance of the component can be adjusted by modifying the resistivity of the link.

Abstract: A phase shifter comprises a substrate, a ground plane formed on a first surface of the substrate, a support structure positioned on a second surface of the substrate opposite the first surface, three parallel, non-co-planar microstrip lines supported by the support structure above the second surface of the substrate, a ferrite element supported by the support structure between the second surface of the substrate and the three non-co-planar microstrip lines, and means for applying a magnetic field to the ferrite element.

Abstract: To provide an electromechanical signal selection device which can be miniaturized and highly integrated and which can selectively output only a signal of a predetermined frequency without providing any sensitive vibration sensing mechanism, and electric equipment using the electromechanical signal selection device. A micro-vibrator serving as a resonator is provided. The micro-vibrator can be excited by an external force to excite vibration of the micro-vibrator. A material whose physical property is changed in accordance with a structural change is used as the micro-vibrator. Thus, a sensitive electromechanical signal selection device is obtained.

Abstract: A high frequency filter incorporates: an unbalanced input/output terminal; two balanced input/output terminals; two resonators respectively provided between the unbalanced input/output terminal and the two balanced input/output terminals; and a layered substrate for integrating components of the high frequency filter. The two resonators are inductively coupled to each other, and are also capacitively coupled to each other through two capacitors. Each of the two capacitors is formed using a pair of first and second electrodes and a dielectric layer. The first electrode is connected to one of the resonators via a through hole. The second electrode is connected to the other of the resonators and opposed to the first electrode forming the pair with the second electrode, the dielectric layer being disposed between the second electrode and the first electrode.

Abstract: A high-frequency filter for providing an analog signal with a predetermined bandwidth includes a printed circuit on which a tuner is covered. The printed circuit includes a signal circuit having a plurality of resonators magnetically or electrically coupled with each other, and a grounding circuit electrically connected to ground and arranged around the resonators. The tuner includes a shell made of a conductive metal, electrically connected to the grounding circuit and covered over the resonators such that an isolation chamber is defined between the shell and the resonators, and an adjustment member movably mounted in the shell and moveable relative to the resonators to adjust the dimension of the isolation chamber so as to further adjust a range of the bandwidth of the analog signal.

Abstract: Apparatus and associated systems, methods and computer program products relate to an electro-optic device that includes a drive electrode that is substantially resonant with millimeter wave and/or terahertz wave radiation. In various embodiments, the drive electrode may comprise at least one structure with an absorption resonance at the frequency of interest (e.g., 94 gigahertz, 120 gigahertz, 1 terahertz). In some embodiments, such periodic structures may be terminated with a characteristic impedance that substantially enhances the absorption resonance.

Abstract: A coil package which makes it easy to handle a high-frequency cone/pyramid-shaped coil and enhance frequency characteristics without degrading the characteristics of the coil. The cone/pyramid-shaped coil has a conical or pyramidal shape formed by wiring a conductor wire around an outer peripheral surface of a core such that the winding diameter of the coil progressively decreases from one end to the other end of the coil. The coil and a dielectric substrate are integrated with each other by forming a hole for inserting a tip portion of the coil in the dielectric substrate, making the bottom of the hole and a back surface of the dielectric substrate electrically continuous by a via, placing the coil in the hole by directing a small-diameter side of the cone/pyramid-shaped coil to the hole, electrically connecting the bottom of the hole and a tip-side lead wire extending from the coil to each other, and connecting an electrode on a large-diameter side of the coil to an electrode on the dielectric substrate.

Abstract: In one embodiment of the invention, an integrated circuit, such as an FPGA, has one or more programmable termination schemes, each having a plurality of resistive termination legs connected in parallel, and a calibration circuit designed to control each termination scheme for process, voltage, and temperature (PVT) variations. The sense element in the calibration circuit and each resistive leg in each termination scheme has a transistor-based transmission gate connected in series with a non-silicided poly (NSP) resistor. The negative temperature coefficient of resistivity of each NSP resistor offsets the positive temperature coefficient of resistivity of the corresponding transmission gate to provide a temperature-independent sense element and temperature-independent termination legs.

Abstract: A system for monitoring security systems including at least one pedestal set; a reason code generator; a computer to compile data received from the at least one pedestal set, and a graphical display to display the compiled data received from the pedestal set in the form of a maps of locations. An IP camera configured to operate for a period of time during the alarm event may be included. A method for monitoring security systems is also provided which includes providing at least one pedestal set, passing a tag through the pedestal set to create an event, generating a reason for the event observed by the pedestal set, compiling batches of data received from the at least one pedestal set; and graphically displaying the compiled data received from the pedestal set in the form of a maps of locations.

Abstract: An interactive knowledge card system. The interactive knowledge card system having a card with user identification, several card stations, a server, and a database. Each card station has a station identifier and a user identification reader to read the user identification on the card. The server is in communication with the card stations and receives the read user identification and the station identifier from the user identification reader. The server associates the read user identification with the received station identifier. The database is in communication with the server. The database stores exhibit information associated with each station identifier and stores the read user identification and associated station identifier. The server is accessible by the user. The server retrieves the exhibit information associated with each station identifier associated with the user identification and displays the retrieved exhibit information.

Abstract: A system and method are provided for locking electronic devices when the devices are not in the same location as a user associated with the device. The system includes a plurality of users each having an identification tag and a plurality of electronic devices each having an identification tag. Location sensors are provided in a room and at entry and exit points for detecting the location of the tags. A database stores the location information of tags and associations of a user with one or more devices. A remote locking means invokes a lock command or an unlock command on an electronic device depending on whether or not the electronic device is in the same location as a user associated with the device. In one embodiment, the identification tags are radio frequency identification transponders and the location sensors are radio frequency identification readers.

Abstract: A locking and unlocking system for setting up an unlocking system condition and a method are disclosed, in which a user can set up various unlocking conditions in addition to an unlocking signal.

Abstract: An incident message, including user-generated input data and collected context data both characterizing a state of a computing system may be received. Thereafter, the incident message may be assigned and routed to a key user based on the context data. The key user may then initiate an implementation of a solution to the incident message causing a solution message to be routed to the end user to notifying the end user of a solution to the incident message. Related apparatuses, methods, computer program products, and computer systems are also described.

Abstract: An RFID system comprises at least one reading device (1) and at least one transponder (2, 2?, 2?, 2??), which are configured for non-contact communication by means of modulated electromagnetic signals (SS), which contain data and/or commands packed in data frames, in which the reading device (1) is configured for transmitting a group of data frames (D-SYNC), which contain synchronization information (Preamble, Start Delimiter) for synchronization with the transponder (2, 2?, 2?, 2??) and to transmit another group of data frames (D-NOSYNC) which do not contain such synchronization information, in which the transponder (2, 2?, 2?, 2??) has synchronization means (14, 20, 21) which are configured to effect synchronization with the reading device (1) with the help of synchronization information (Preamble, Start Delimiter) contained in received data frames (D-SYNC) and synchronization status test means (15,15?,15?,22) configured for detecting whether the transponder runs synchronously with the reading device and in

Abstract: RFID tag responses are detected by an RFID reader system. The tag response may be detected based on a reference measurement during a tag silent period and another one during the tag response. This helps determine whether a slot is empty or occupied, in a slotted aloha algorithm. The result is reported to the Q-algorithm for a better decision.

Abstract: A lane departure detection/avoidance and data fusion system adapted for use with a vehicle and by an operator, includes at least one lane-marking sensor, at least one condition sensor, and a controller communicatively coupled to the sensors, and configured to determine a condition deviation, and compare the condition deviation to a pre-determined condition threshold, so as to improve system identification of operator engagement, lane departure detection upon curves, and detection of performance degradation.

Abstract: An apparatus and method derives a deformation amount of a contact-portion of the tire based on the tire information, the contact-portion being in contact with the ground, and calculates an evaluation value based on the derived deformation amount, and comparing the calculated evaluation value with a reference value to determine whether or not the internal mechanical failure has occurred in the tire.

Abstract: Systems for reminding a driver when height extending cargo is loaded on a vehicle. The warning systems can include an indicator that is selectively moveable between a warning position and a prevention position. In the warning position, the indicator is in a driver's field of vision. In the prevention position, the indicator at least partially obstructs cargo from being loaded on the vehicle. The indicator can be moved from the warning position to a prevention position by an arm, which can be designed to extend and retract.

Abstract: An MFP (Multi Function Peripheral) obtains a BD address and a device name from a communication partner search response when it receives the communication partner search response from a cellular phone. When the MFP successfully obtains the BD address and the BD address is stored in a device management database in a RAM of the MFP, the MFP obtains a user name corresponding to the BD address from the device management database. The MFP obtains settings associated with the user name from an environment database in the RAM of the MFP and stores the same in an environment storage area in the RAM. A display process, etc. in the MFP are performed according to the settings stored in the environment storage area.

Abstract: A method of pre-processing gesture signals comprises the step of Filtering one or more signal segments by applying an infinite impulse response (IIR) filter both in a forward and in a backward temporal direction, so as to produce a band-limited gesture signal. The method may further comprise the step of matching the forward and backward initial conditions of the IIR filters to avoid any transients. Unevenly or sparsely sampled gesture signals may be subjected to the preliminary steps of interpolating the sampled signal, resampling the interpolated signal at a relatively high resampling frequency, filtering the resampled signal, and optionally downsampling the filtered signal, so as to produce a gesture signal having a well-defined sampling rate. An additional compression step may be carried out. The method may be utilized in conjunction with handwriting recognition methods.

Abstract: A system for generating an e-seal for a container includes a sensor to detect a condition associated with the container and to generate a sensor reading based on the condition, and a processing device to generate the e-seal based on the sensor reading. The sensor reading may include first and second readings from the sensor, where the first reading is recorded at a first time and the second reading is recorded at a second time.

Abstract: A security system and method for monitoring a security status of fixed and mobile assets. The security system comprises an agent connected with the asset. The agent includes a receiver for receiving; a sensing device for monitoring a security of the asset; a processor for compiling the a security data to generate a security status; and a wireless transceiver for transmitting data to a master control unit. The master control unit retransmits the security status to an global operations center for processing the security status to detect a security threat. In response to a security threat, the global operations center initiates and action or counter measure. For mobile assets the security system also tracks a location of the asset as the is transported between a shipper's loading dock and a designated distribution center, including an origination port and a destination port. For fixed agents, the security system includes an interface for interfacing an existing security device to the master control unit.

Abstract: A multifunctional multichip system can operate in a passive mode by using at least one antenna to receive electromagnetic energy and using that energy to perform system functions. The system includes a sensor, an impedance matching circuit and an RFID module. The sensor produces a sensor signal containing a measurement. The RFID can produce an identification signal containing identification information. Alternatively, the RFID chip can be used in an addressing mode wherein the system only produces a signal in response to an addressing signal containing addressing information. The addressing signal is received from the electromagnetic field. In either mode, the sensor signal is coupled from the antenna into the electromagnetic field from which a receiver can obtain it. The signal can contain the identification information as well as the measurement. A matching network minimizes the effects of impedance mismatches between the system elements.

Abstract: A theft deterrent device allows a customer to handle an item of merchandise to which the device is connected. The device is configured to protect items of merchandise having first and second pieces each of which are sufficiently valuable to warrant such protection. The device includes a base mountable on a support structure, an audible alarm, first and second connectors which attach respectively to the first and second pieces of the item of merchandise, lanyards for connecting the base to the first and second connectors and a removal sensor for sensing removal of one or both of connectors from the first and second pieces of the item of merchandise so that the alarm is activated when the connector or connectors are removed from the item of merchandise. The lanyards provide electrical communication between the alarm and the connectors, which may include plunger switches which serve as removal sensors.

Abstract: A portable terminal includes a jack interface for connecting an audio device thereto, a converter for converting an impedance of each of the poles, that correspond to a LEFT, RIGHT channel, and MIDDLE channel of a plug of an audio device, connected to the jack interface, to a voltage value in order to deliver the respective voltage values, a first comparator for comparing the voltage value, converted from the impedance of the pole corresponding to the LEFT channel, a second comparator for comparing the voltage value, converted from the impedance of the pole corresponding to the RIGHT channel, a third comparator for comparing the voltage value, converted from the impedance of the pole that corresponds to the MIDDLE channel, and a controller for recognizing the type of audio device connected to the jack interface based on a combination of the comparison results supplied from the first to third comparators, respectively.

Abstract: An electronic method for monitoring the location of a container and one or more products capable of being contained in the container in an operating environment. The method can include the steps of (a) placing an extreme condition identification (ID) tag encoded with a container ID on a location on a container capable of containing one or more products; (b) associating the one or more products with the container ID; and (c) tracking the location of the containers based on the extreme condition ID tag.

Abstract: System and method for tracking inventory of a multiplicity of products. First RFID tags are associated with respective products or groups of products. Second Active RFID tags are associated with respective first containers for the multiplicity products. A third Active RFID tag is associated with a second container for the first containers. First RFID tags broadcast their respective identifications. Second Active RFID tags hash the identities of the first RFID tags within their respective first containers and broad their hashed values. Third Active RFID tag hash the hashed values broadcast by the second Active RFID tags. An expected value is compared to a result of the third Active RFID tag hashing the hashed values broadcast by the second Active RFID tags.

Abstract: A method of annotating an item with electronic data is described which comprises securing a memory tag to the item, the memory tag having a memory and a transponder to enable wireless communication with the memory tag, and having an external dimension D. The memory tag is adapted for wireless communication only with a transceiver located within a distance of 10D of the memory tag. Also described is apparatus for annotating an item with electronic data wherein the apparatus comprises a memory tag which in use is secured to the item, and a transceiver for wireless communication with the memory tag. The memory tag includes a memory and a transponder, and has an external dimension D. The memory tag and transceiver are adapted for wireless communication therebetween only when the transceiver is located within a distance of 10D of the memory tag.

Abstract: A security system suitable for retail establishments carrying articles comprises tags for affixing to the articles, the tag being capable of generating a responsive microwave signal in response to a microwave detection signal; and at least one transceiver for generating the microwave detection signal and for receiving the responsive microwave signal.

Abstract: The present invention relates to a security document having a contactless chip with data masking. The security document comprising a transponder of an electronic module connected to an antenna placed on a given surface of a first part of the document, said transponder serving to remotely communicate with a reader via an electromagnetic coupling, and also comprises a passive masking element of said antenna, which is supported by a second part of the document and can move relative to said first part, said masking element being capable of interfering with the coupling between the transponder and the reader for rendering the reading of the document impossible when said second part is in a predetermined position that corresponds to a closed position of the document.

Abstract: An electronic part holding film (30) includes an electronic part module (32) and winding conductor patterns (34a, 34b). The winding conductor patterns (34a, 34b) have ends in which terminal pads (35, 36) are formed and to which a connecting part (37) is not connected, respectively. The terminal pads (35, 36) are electrically connected to each other via the electronic part module (32). The electronic part holding film (30) is folded at a folding position (38). In this way, a thin IC tag (20) is manufactured. According to the thin IC tag (20), it is possible to provide a thin IC tag which does not increase the number of manufacturing steps and the manufacturing cost and on which an electronic part and the like can be mounted with ease.

Abstract: Microstrip patch antenna (46), feed structure (48), and matching circuit (50) designs for an RFID tag (10). A balanced feed design using balanced feeds coupled by a shorting stub (56) to create a virtual short between the two feeds so as to eliminate the need for physically connecting substrate to the ground plane. A dual feed structure design using a four-terminal IC can be connected to two antennas (46a,46b) resonating at different frequencies so as to provide directional and polarization diversity. A combined near/field-far/field design using a microstrip antenna providing electromagnetic coupling for far-field operation, and a looping matching circuit providing inductive coupling for near-field operation. A dual-antenna design using first and second microstrip antennas providing directional diversity when affixed to a cylindrical or conical object, and a protective superstrate (66). An annual antenna (46c) design for application to the top of a metal cylinder around a stem.

Abstract: A scooping device with an integrated electromagnetic (EM) surveillance device for a container. The container defines an interior for storing a product. The scooping device is configured for scooping or capturing the product. The electromagnetic surveillance device is integrated with, embedded into or attach to the body of the scooping device. The electromagnetic surveillance device may be an EAS, Bistatix, RFID, or other electromagnetic surveillance tag or label that is configured to respond to an electromagnetic signal such that the presence of the electromagnetic surveillance device is detectable. The detectability of the electromagnetic surveillance device provides an anti-theft feature to the container without interfering with the construction of the container.

Abstract: A warning device (1) associable to a dental seat is adapted for warning an operator (2) of a patient's request. The device comprises a warning box (12) provided with one or more switches (14), the pressure of which lights a portion (14) provided with an icon representing the patient's request on a display (22), visible to the patient. Upon the patient's confirmation, for example automatically after a predetermined time interval, sound emission means emit, in a predetermined language, a signal that can be interpreted by the operator or a voice message corresponding to the patient's request. The device allows communicating the request to the operator without distracting or interrupting him/her and without making sudden movements, besides without having the need of speaking, which is often denied during dental operations.

Abstract: The present invention provides a diagnostic and control system for a patient support, wherein the patient support comprises one or more of a plurality of electronic elements including for example, load sensors, tilt sensors, actuators for adjusting patient support angles and the like, in addition to other electronic elements for example. The diagnostic and control system according to the present invention can enable the specific control of each of these electronic element for desired operation thereof and further can enable the monitoring of the operating conditions of these electronic elements and additional patient support conditions. The diagnostic and control system further enables the evaluation and determination of the existence of one or more faults relating to the operation of the patient support and the respective one or more electronic elements, for example the existence of a fault can be conveyed to an operator in a form of an error message.

Abstract: A personal alarm system can be worn or carried by the user, may be activated at any time by the user and/or may be automatically activated to send a signal to any remote monitoring station on the network. The device identifies the user as well as the user's location within the monitored area. The alarm-sending unit is designed to fit within a box the size of a small cell phone or pager. The unit includes an ID memory for identifying the user, is programmable and has an on-board processor for generating a signal to a wireless transmitter for sending the signal to a to a local receiver for inputting the signal onto the network. A centralized, networked RF receiver is used with the personal alarm unit and one or more of these RF receivers may be installed in order to provided adequate coverage of the monitored area.

Abstract: [PROBLEMS] An indicator control system for switching from a measurement value display mode to a camera display mode and vice versa to display a selected mode on a monitor section of an indicator and for generating an alarm from an alarm section, the measurement value display mode showing the measurement data of an object to be monitored of a construction machine, and the camera display mode being for a camera section mounted on the construction machine.

Abstract: A method for monitoring the load which is exerted on a roof comprises the following steps: providing a roof with an external surface on which a load can be exerted by, for example, a layer of water or snow, providing a sensor for detecting a phenomenon related to the load which is exerted on the roof, monitoring the phenomenon by means of the sensor, storing at least one predetermined value for the phenomenon, emitting a signal when the value for the phenomenon detected by the sensor exceeds a predetermined value.