CN-224231948-U - Electrical connector cable checking circuit and device

CN224231948UCN 224231948 UCN224231948 UCN 224231948UCN-224231948-U

Abstract

The embodiment of the utility model relates to the field of electric locomotives and discloses an electric connector cable verification circuit and device. The electric connector cable checking circuit comprises a power supply unit, a signal acquisition unit and a data processing unit, wherein the power supply unit is used for providing electric energy for the signal acquisition unit and the data processing unit, the signal acquisition unit is connected with the data processing unit, the signal acquisition unit is used for acquiring detection signals on all leads of an electric connector cable and transmitting the acquired signals to the data processing unit, and the data processing unit is used for judging the on-off state of all the leads on the cable according to the acquired signals. The checking circuit provided by the utility model solves the problem of detection of the cable wires in the electrical system, so that the checking detection of the cable wires is simple and easy, the checking efficiency and accuracy are improved, and the labor cost is saved.

Inventors

ZHANG ZHIFENG
WANG KAIWEN
XING JIANJUN
ZHANG HAO
WU HAO
ZHANG HAIMIN

Assignees

国能铁路装备有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250107

Claims (10)

1. The electric connector cable checking circuit is characterized by comprising a power supply unit, a signal acquisition unit and a data processing unit, wherein the power supply unit is used for providing electric energy for the signal acquisition unit and the data processing unit, the signal acquisition unit is connected with the data processing unit, the signal acquisition unit is used for acquiring detection signals on all leads of an electric connector cable and transmitting the acquired signals to the data processing unit, and the data processing unit is used for judging the on-off state of all the leads on the cable according to the acquired signals.
2. The electrical connector cable calibration circuit as recited in claim 1, wherein the power supply unit comprises a voltage conversion circuit for converting an input voltage into a voltage required by the signal acquisition unit and the data processing unit, an input terminal thereof is connected to the input power supply terminal, and an output terminal thereof is connected to the signal acquisition unit and the data processing unit, respectively.
3. An electrical connector cable verification circuit as in claim 2 wherein the signal acquisition unit comprises at least one isolation circuit, each for signal isolation and level shifting, the isolation circuit having an input for connection to one end of a wire in the cable and an output for connection to one input of the data processing unit.
4. A connector cable verification circuit as in claim 3, wherein the isolation circuit comprises an optocoupler having one end connected to the input power supply terminal through a first current limiting resistor and the other end as an input terminal of the isolation circuit for connection to one end of a wire in the cable, and one end of the output side connected to the output terminal of the second voltage of the power supply unit through a second current limiting resistor and the other end connected to one input terminal of the data processing unit.
5. The electrical connector cable checking circuit according to claim 1, wherein the data processing unit comprises a control circuit and a result display circuit which are sequentially connected, wherein each input end of the control circuit is respectively connected with each output end of the signal acquisition unit in a one-to-one correspondence manner, and is used for respectively receiving detection signals of each wire in the cable, the control circuit judges whether the wires are on or off according to whether the detection signals are valid or not, and transmits the judgment result to the result display circuit, and the result display circuit displays the judgment result.
6. The electrical connector cable verification circuit as in claim 5, wherein the control circuit comprises a controller having one input connected to one output of the signal acquisition unit and one output connected to the result display circuit, the controller detecting the input signals from all the inputs simultaneously to determine whether a short circuit is generated between each of the conductors and the conductors.
7. The electrical connector cable verification circuit as in claim 6, wherein the control circuit further comprises a reference voltage circuit for providing a reference voltage to the controller, the reference voltage circuit dividing the input voltage to obtain a reference voltage for providing the reference voltage to the controller.
8. The electrical connector cable calibration circuit as recited in claim 5, wherein the result display circuit comprises a display circuit for displaying according to the judgment result output by the control circuit or/and a voice prompt circuit for voice broadcasting according to the judgment result output by the control circuit.
9. An electric connector cable checking device is characterized by comprising a circuit board and a shell, wherein the circuit board is provided with an electric connector cable checking circuit as claimed in any one of claims 1-8, the front surface of the shell is provided with a display screen for displaying detection results, one side surface of the shell is provided with a power switch, an input power socket, an expansion port and a voice hole, a buzzer is arranged in the shell at a position corresponding to the voice hole on the shell, the other side surface of the shell is provided with a cable connection port, the cable connection port comprises M terminals, each terminal is used for connecting one end of one wire in a cable, and M is a positive integer greater than or equal to 1.
10. The electrical connector cable verification device as in claim 9, further comprising a test pen connection port on the housing, the test pen connection port being connected to a ground of the input power source for connecting the ground signal to the input of the signal acquisition unit when the test pen is connected to the other end of each wire in the cable.

Description

Electrical connector cable checking circuit and device Technical Field The embodiment of the utility model relates to the technical field of electric locomotives, in particular to an electric connector cable checking circuit and an electric connector cable checking device. Background In the technical field of electric locomotive electrical systems, an electric screen cabinet design is adopted, 18 electric screen cabinets of various types are configured for each locomotive, through statistics, 60 external electrical connectors of various types are counted, the number of the screen cabinets is more than 1000, the wires are important components of the locomotive electrical systems, the electric performance and safe and reliable operation of the locomotive are directly related, therefore, the electric locomotive needs to disassemble the various electric screen cabinets when overhauling the electric locomotive so as to overhaul the components respectively, overhaul test installation and wire connection operation of the components are carried out, and in order to avoid locomotive performance abnormality caused by wire connection errors, the wires need to be checked one by one before screen cabinet assembly, wherein the verification of the electric connectors is particularly important so as to ensure that the cable can normally transmit signals. The prior art has the problems that a signal acquisition circuit is complex, or an encoding circuit is adopted for addressing, or encoding is firstly carried out and then CPU addressing is carried out, so that the circuit is complex, and the interference resistance is poor due to components and devices. The manual wire calibration method is complex in work, easy to make mistakes and low in accuracy, and the condition that short circuits occur in the wires in the connector cannot be found in time. Therefore, how to perform wire verification and improve the verification efficiency and accuracy is a problem to be solved at present. Disclosure of utility model The embodiment of the utility model aims to at least provide a circuit and a device for checking cables of an electric connector, which at least can solve the technical problems of low efficiency and low accuracy when conducting wire checking manually, and at least can achieve the technical effects of improving checking accuracy and checking efficiency. In order to solve the technical problem, at least one embodiment of the application provides an electric connector cable verification circuit, which comprises a power supply unit, a signal acquisition unit and a data processing unit, wherein the power supply unit is used for providing electric energy for the signal acquisition unit and the data processing unit, the signal acquisition unit is connected with the data processing unit, the signal acquisition unit is used for acquiring detection signals on all leads of an electric connector cable and transmitting the acquired signals to the data processing unit, and the data processing unit is used for judging the on-off state of all the leads on the cable according to the acquired signals. The application further provides an electric connector cable verification device, which comprises the electric connector cable verification circuit and a shell, wherein a display screen is arranged on the front face of the shell and used for displaying detection results, a power switch, an input power socket, an expansion port and a voice hole are arranged on one side face of the shell, a buzzer is arranged in the shell at the position corresponding to the voice hole on the shell, a cable connection port is arranged on the other side face of the shell, M terminals are arranged in the cable connection port, each terminal is used for connecting one end of one wire in the cable, and M is a positive integer greater than or equal to 1. Compared with the prior art, the electric connector cable checking circuit and the electric connector cable checking device provided by the embodiment of the application adopt the isolation circuit and the control circuit, and the isolation circuit isolates the input end from the output end, so that the anti-interference capability is improved, the control circuit judges whether the on-off of the wire and the wire generate a short circuit or not according to the wire number, one person can check the wire in the cable by adopting the electric connector cable checking circuit and the electric connector cable checking device without simultaneously checking at least 2 persons, thereby solving the problem of low checking efficiency and saving labor cost. The application relates to an electric connector cable checking circuit which comprises a power supply unit, a signal acquisition unit and a data processing unit, wherein the power supply unit is used for providing electric energy for the signal acquisition unit and the data processing unit, the signal acquisition unit is connected with the data processing unit, the si