34results about How to "Detect disconnection" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.