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35results about How to "Detect disconnection" patented technology

Voltage regulator for controlling output voltage of automotive alternator

A voltage regulator for an automotive alternator includes a switching transistor that controls an amount of field current supplied to a field coil of the alternator. The switching transistor is controlled in an ON-OFF fashion, and output voltage of the alternator is always monitored by a detector circuit that detects disconnection in a circuit for charging an on-board battery with the output voltage. It is determined that the disconnection occurred when a difference between the output voltage at a time when the switching transistor is turned off and the output voltage at a time when the switching transistor is turned on exceeds a predetermined value.
Owner:DENSO CORP

Wire rope inspection instrument for elevator

ActiveCN101456509AMaster the injury statusDetect disconnectionElevatorsTextile cablesEngineeringWire rope
The invention provides an elevator wire rope detection device, capable of detecting the damage situation of an outer-layer cladding layer of resin clad wire ropes and the fracture situation of the wire ropes step by step and obtaining the early damage situation of the wire ropes. The elevator wire rope detection device is used for detecting the wire ropes, and the wire ropes are twisted into the twisting wires by the metal wires and the twisting wires are further twisted into the strands (8-19) and then the strands are clad by the resin in preset interval. The elevator wire rope detection device detects whether electric conduction between the adjacent twisting wires in the twisting wires or the adjacent strands in the strands (8-19) or not.
Owner:HITACHI LTD

Fiber laser apparatus, and method of detecting abnormality of fiber laser apparatus

The objective of the present invention is to detect any abnormality occurring on a fiber, with reliability. Provided is a fiber laser apparatus (1) that generates a laser beam by guiding excitation light into an optical fiber, wherein the fiber laser apparatus (1) is characterized in comprising: a detection unit (PD50) for detecting leaking signal light, which is signal light leaking out from the core of the fiber; an evaluation unit (control unit (40)) for evaluating that an abnormality has occurred, when the intensity of the leaking signal light detected by the detection unit decreases; and a stopping unit (power supply for driving excitation LD) for stopping the guiding in of excitation light, when the evaluation unit evaluates that an abnormality has occurred.
Owner:FURUKAWA ELECTRIC CO LTD

Array substrate, method of disconnection inspecting gate lead wire and source lead wire in the array substrate, method of inspecting the array substrate, and liquid crystal display device

An array substrate has a plurality of gate signal lines, a plurality of source signal lines orthogonal to the plurality of gate signal lines, a plurality of gate-driver mounting terminals, a plurality of source-driver mounting terminals, a plurality of gate-side array inspection terminals connected to the gate signal lines, a plurality of source-side array inspection terminals connected to the source signal lines, a plurality of gate lead wire disconnection inspection circuits connected between the plurality of gate-driver mounting terminals and a common terminal for a gate lead wire disconnection inspection, and a plurality of source lead wire disconnection inspection circuits connected between the plurality of source-driver mounting terminals and a common terminal for a source lead wire disconnection inspection.
Owner:TRIVALE TECH

Method of testing wires and apparatus for doing the same

The invention provides an inspection device for detecting a break and short circuit in gate wires on a TFT substrate before forming a pixel part. The inspection device is used for inspecting a defect in the gate wires 2 on the TFT substrate 1 comprising a plurality of gate wires 2 which are inspecting objects, and a plurality of COM wires 3 capable of forming inter-wire capacitance between themselves and the gate wires 2, respectively. The inspection device includes a pulse generation part for impressing the gate wires 1 with a voltage, a capacitance detector 5 for detecting the inter-wire capacitance between the gate wires 2 and the COM wires 3, and capacitance connected between the COM wires 3 and the capacitance detector 5.
Owner:NEC LCD TECH CORP

Electric compressor

A capacitor (114) is provided between a power supply line (111a) and a ground line (111b), which connect a power supply connector (130) connected to a high voltage power supply (140) and a power element (118). A current detection unit (113) for detecting positive current flowing in the direction from the high voltage power supply (140) to the power element (118) and negative current flowing in the opposite direction is provided on the power supply line (111a). A load resistor (112) is provided between the current detection unit (113) and the power supply connector (130). When the current value detected by the current detection unit (113) becomes less than zero, a control unit (116) detects that the connection of the high voltage power supply (140) has released.
Owner:PANASONIC CORP

Rotary electric machine for a vehicle

A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line.
Owner:DENSO CORP

Radiographic imaging device, radiographic imaging system, computer readable medium storing disconnection detection program, and disconnection detection method

The present invention provides a radiographic imaging device, a radiographic imaging system, a computer readable medium storing disconnection detection program and a disconnection detection method that may detect disconnected specific signal lines even when the charge amount output from a single pixel is small. Namely, a bias voltage is applied to pixels, and offset charges due to leak current of sensor portions (photodiodes) are accumulated. The gates of pixel TFT switches are switched ON in sequence, and electric signals are output corresponding to the accumulated offset charges. A control section detects a cumulative value of the offset charge amount based on the electric signals. The detected cumulative value is then compared to a predetermined disconnection detection threshold value and disconnected signal lines are detected when the cumulative value is less than the threshold value.
Owner:FUJIFILM CORP

Line breakage automatic testing device for production of communication optical fiber cable

The invention discloses a line breakage automatic testing device for production of a communication optical fiber cable. The device comprises a production line platform. The leftmost end of the production line platform is provided with a pay-off device. The right side of the pay-off device is provided with a two-stage optical fiber detecting assembly. The right side of the two-stage optical fiber detecting assembly is provided with a diameter measuring instrument. The right side of the diameter measuring instrument is provided with a sheath processing device. The rightmost end of a production line platform is provided with a wire winding machine. A to-be-tested optical fiber is arranged above the production line platform. According to the line breakage automatic detecting device, a two-stage optical fiber testing assembly is utilized; and measurement is performed according to a comparison method in which a returning signal is received by means of a backward scattering method and a manner of utilizing optical-magnetic modulation and converting modulated light to an electric signal. Because the measuring facility for the electric signal is more accurate, the breakage condition of theoptical fiber cable can be accurately tested. Furthermore the line breakage automatic testing device can perform comprehensive testing on signal damping and signal transmission capability of the optical fiber and fills a gap of testing line breakage in the optical fiber production process in prior art, thereby realizing high popularization value.
Owner:四川特旺通信科技有限公司

Angular velocity sensor

ActiveUS20110283793A1Detect disconnectionOblique vibration of the movable part caused by machining error or the like is reducedAcceleration measurement using interia forcesSpeed measurement using gyroscopic effectsCapacitanceElectricity
An angular velocity sensor includes a sensor unit, a detection unit and a connecting part electrically connecting the sensor unit and the detection unit. The detection unit drives the sensor unit and detects an angular velocity acting on the sensor unit. The detection unit supplies a carrier signal to a movable electrode of a capacitor of the sensor unit and supplies a driving signal to a fixed electrode of the capacitor via the connecting part for performing a servo control. A C / V converter circuit of the detection unit receives capacitance generated at the capacitor through a driving signal transmission line of the connecting part in a state where supply of the driving signal is stopped, and converts the capacitance into a voltage. A determination part of the detection unit determines whether the driving signal transmission line has disconnection or not based on the voltage outputted from the C / V converter circuit.
Owner:DENSO CORP +1

Operation status diagnosing device for external control means

Provided is an operation status diagnosing device for an external control means, which is enabled by a simple constitution to perform the transmission of the drive status of an external control means constituted of either a relay contact to be activated by an ON / OFF signal or an ON / OFF means made of a semiconductor, and the transmission of a signal indicating the occurrence of troubles such as disconnection or shorting of a wiring line and the transmission of an electric power by a common means, thereby to prevent the rise of a production cost due to the increase in a parts count or the complexity of a circuit constitution and to diagnose the transmission of the signal and the soundness of the circuit precisely. The operation status diagnosing device for the external control means is constituted to comprise a second switch circuit for turning ON / OFF an alternating voltage generating means output in response to the drive signal of the external control means, thereby to apply that output to an insulating transformer primary side, a first switch circuit serving as an external control means connected with an insulating transformer secondary side, so that it is turned ON / OFF by the second switch circuit, an external control means operation status detecting circuit connected with the insulating transformer secondary side, so that an electric current flows therethrough when the first switch circuit is ON, and a measuring means connected with the second switch circuit, for measuring the electric current to flow to the insulating transformer primary side.
Owner:MITSUBISHI HEAVY IND LTD

Protection IC and method of monitoring a battery voltage

A protection IC connected to cell groups of a secondary battery assembly of a secondary battery connected in series and monitoring battery voltages of the cells in the cell groups, including terminals connected to connection points of the cells in the cell groups and both ends of the cell groups; a first alarm generating portion detecting an overvoltage by comparing voltages of the cells of the cell groups on both ends of the cells and generates the first alarm signal; and a second alarm generating portion detecting disconnection in connection points of the cells and disconnection between the connection points of the cell groups and the both ends and the terminals by detecting voltage drop or current decrement at the connection points of the cells of the cell groups and at one end of the cell groups in the cells, and generates a second alarm signal.
Owner:MITSUMI ELECTRIC CO LTD

Voltage monitoring module and voltage monitoring system

A voltage monitoring module includes a first terminal configured to be coupled to a high-potential-side terminal of a first battery cell, and a second terminal configured to be coupled to a low-potential-side of the first battery cell.
Owner:RENESAS ELECTRONICS CORP

Detection device of capacitive screen

The present invention discloses a detection device of a capacitive screen. The capacitive screen comprises a plurality of common electrodes, and each of the common electrodes corresponds to a plurality of pixel electrodes, and the detection device comprises a signal transmitting module and a signal receiving module, wherein: the signal transmitting module is coupled to the common electrode, and employed to input a transmitting signal to the common electrode; the signal receiving module is coupled to the pixel electrode, and employed to collect a receiving signal, and calculates a capacitance between the common electrode and the corresponding pixel electrode according to the receiving signal, and determines whether the corresponding common electrode is disconnected or not according to the capacitance. By utilizing the present invention, the disconnected common electrode in the capacitive screen can be detected.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD +1

Online testing system and method for blade lead breakage of wind generating set

The invention discloses a wind generating set blade lead wire breakage on-line test system and method. The system comprises a blade and a lightning conductor arranged in the blade. The method is characterized in that an active transmitting device and a high-frequency sensor system are arranged at the two ends of a lightning conductor respectively, after the active transmitting device loads high-frequency pulses to the lightning conductor, the high-frequency pulses are transmitted to a high-frequency sensor along the lightning conductor, and the high-frequency sensor system receives high-frequency pulse signals; the lightning conductor is in communication connection with an upper computer system in a wired or wireless mode, and the upper computer system executes on-off alarm of the lightning conductor according to whether the signal is received or not; through the system and the method, the lightning protection system of the fan blade can be monitored in real time, the efficiency is high, detection can be carried out without shutdown, and economic loss consumed by detection is reduced.
Owner:INNER MONGOLIA UNIV OF SCI & TECH

Rotary electric machine for a vehicle

A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line.
Owner:DENSO CORP

Online monitoring system for blade lead breakage of wind generating set and positive and negative testing method

The invention discloses an online monitoring system for blade lead breakage of a wind generating set and a positive and negative testing method. The online monitoring system comprises a blade arranged on a fan tower and a lightning conductor arranged in the blade, and the lightning conductor is arranged from the blade tip of the blade to the blade root of the blade; the device is characterized in that a radio frequency signal device is arranged at the position, right opposite to the blade tip of the blade, of the tower drum; a passive sensing system is arranged at the tip of the paddle, the passive sensing system is in non-contact connection with the lightning conductor, and information interaction is generated between the passive sensing system and the radio frequency signal device in a pulse wave form; a terminal device is arranged at the position of a fan hub; a communicated information loop is formed among the terminal equipment, the lightning conductor and the passive sensing system; and receiving and sending of radio frequency signals between the terminal equipment and the radio frequency signal device are controlled through the upper computer. Through the system and the method, the lightning protection system of the fan blade can be monitored in real time, the efficiency is high, detection can be carried out without shutdown, and economic loss consumed by detection is reduced.
Owner:INNER MONGOLIA UNIV OF SCI & TECH

Noise suppression cable, core assembly, and electrical device

A noise suppression cable includes an electrical wire, a first magnetic material including a pair of first surfaces formed along an axis direction of the electrical wire and a convex portion projecting from the first surfaces, and a second magnetic material including a pair of second surfaces disposed on a periphery of the electrical wire, the pair of the second surfaces contacting the pair of the first surfaces such that a tubular shape is formed by the first and second magnetic materials. The first magnetic material and the second magnetic material are configured to generate a compression stress in the convex portion of the first magnetic material by receiving an external force so as to reduce a relative permeability of the convex portion.
Owner:HITACHI METALS LTD

Communication control apparatus

A communication control apparatus that monitors a network connection status of a device on a network, includes a detection unit configured to detect a communication state of the network, a setting unit configured to set a period in accordance with the communication state detected by the detection unit, a reception unit configured to receive data from the device via the network, and a controller configured to execute a predetermined process in the case where the reception unit fails to receive data from the device over the period.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

Disconnection detection device, signal processing unit and disconnection detection method

The present application relates to a wire break detection device, a signal processing unit and a wire break detection method. The disconnection detection device includes a confirmation signal output module configured to output a transmission sound signal from the signal processing unit, and a detector. The transmission sound signal includes an acknowledgment signal having a frequency different from a frequency band used to transmit information contained in the transmission sound signal transmitted from the signal processing unit to the communication unit. The detector is configured to detect whether a disconnection occurs in the connection line based on a transmitted sound signal including the confirmation signal returned from the communication unit to the signal processing unit via the connection line.
Owner:YAMAHA CORP

Break line detecting device

The invention provides a break line detecting device detecting a break line of a wire connected with a solenoid coil quickly and accurately. The break line detecting device 1 is provided with a firstswitch element 2 for switching control of whether to let current flow to the solenoid coil of an electromagnetic valve or not; a first break line detecting circuit 3 detecting the break line of the wire connected to the solenoid coil when the first switch element is in connection; and a second break line detecting circuit 4 detecting the break line of the wire when the first switch element is in disconnection.
Owner:NABLESCO CORP

Disconnection detecting device, signal processing unit and disconnection detection method

The invention relates to a disconnection detecting device, a signal processing unit and a disconnection detection method. The disconnection detecting device includes a confirmation signal outputting module configured to cause a transmission sound signal to be outputted from a signal processing unit, and a detector. The transmission sound signal includes a confirmation signal having a frequency that differs from a frequency band for use in communicating information contained in the transmission sound signal that is sent from the signal processing unit to a communication unit. The detector is configured to detect whether or not a disconnection is occurring in connection wires based on the transmission sound signal including the confirmation signal that is returned from the communication unitto the signal processing unit via the connection wires.
Owner:YAMAHA CORP

Protection IC and method of monitoring a battery voltage

A protection IC connected to cell groups of a secondary battery assembly of a secondary battery connected in series and monitoring battery voltages of the cells in the cell groups, including terminals connected to connection points of the cells in the cell groups and both ends of the cell groups; a first alarm generating portion detecting an overvoltage by comparing voltages of the cells of the cell groups on both ends of the cells and generates the first alarm signal; and a second alarm generating portion detecting disconnection in connection points of the cells and disconnection between the connection points of the cell groups and the both ends and the terminals by detecting voltage drop or current decrement at the connection points of the cells of the cell groups and at one end of the cell groups in the cells, and generates a second alarm signal.
Owner:MITSUMI ELECTRIC CO LTD

Fault detection device, laser machining system and fault detection method

This fault detection device (1) is provided with: a machining laser light source (10) which emits machining laser light; a detection laser light source (20) which emits detection laser light; a spectroscope (22) which divides the detection laser light into first partial light and second partial light; a first light receiver (24) which measures the intensity of the first partial light of the detection laser light; an optical fiber (30) which transmits the second partial light of the detection laser light and the machining laser light; a second light receiver (26) which measures the intensity ofthe second partial light transmitted through the optical fiber; and a determination unit (50) which determines whether there is a defect in the optical fiber on the basis of the relative ratio between the intensities of the first and second partial light respectively measured by the first and second light receivers.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

Disconnection Detection Apparatus of Sinusoidal Wave Signal

Disclosed is a disconnection detection apparatus of a sinusoidal wave signal. The disconnection detection apparatus of the present disclosure converts a first sinusoidal wave and a second sinusoidal wave into absolute values, respectively, and determines that disconnection occurs when a value of the first sinusoidal wave is less than a first comparison value that is greater than a minimum value and a value of the second sinusoidal wave is less than a second comparison value that is less than a maximum value.
Owner:LSIS CO LTD

A disconnection automatic detection device for the production of communication optical fiber and cable

The invention discloses a line breakage automatic testing device for production of a communication optical fiber cable. The device comprises a production line platform. The leftmost end of the production line platform is provided with a pay-off device. The right side of the pay-off device is provided with a two-stage optical fiber detecting assembly. The right side of the two-stage optical fiber detecting assembly is provided with a diameter measuring instrument. The right side of the diameter measuring instrument is provided with a sheath processing device. The rightmost end of a production line platform is provided with a wire winding machine. A to-be-tested optical fiber is arranged above the production line platform. According to the line breakage automatic detecting device, a two-stage optical fiber testing assembly is utilized; and measurement is performed according to a comparison method in which a returning signal is received by means of a backward scattering method and a manner of utilizing optical-magnetic modulation and converting modulated light to an electric signal. Because the measuring facility for the electric signal is more accurate, the breakage condition of theoptical fiber cable can be accurately tested. Furthermore the line breakage automatic testing device can perform comprehensive testing on signal damping and signal transmission capability of the optical fiber and fills a gap of testing line breakage in the optical fiber production process in prior art, thereby realizing high popularization value.
Owner:四川特旺通信科技有限公司
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