Electric connector connection state detection circuit, detection device and power device

Abstract

The utility model provides an electric connector connection state detection circuit, a detection device and a power plant, the detection circuit is used for detecting the connection state of an electric connector, and the detection circuit comprises a signal injection unit used for injecting a detection signal into the detection circuit; the detection unit is used for outputting a judgment signal according to the detection signal; the acquisition unit is used for acquiring the judgment signal so as to judge the connection state of the electric connector; when the acquisition unit detects the judgment signal, the electric connector is judged to be disconnected, and when the acquisition unit does not detect the judgment signal, the electric connector is judged to be connected. The device for detecting the connection state of the electric connector can judge the connection state of the electric connector through the judgment signal collected by the collection unit, and facilitates the improvement of the quality of high-voltage interlocking detection through the detection of the connection state of the electric connector.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connectors, and particularly relates to a detection circuit for the connection state of an electrical connector. The utility model also relates to a detection device for the connection state of an electrical connector provided with the above detection circuit for the connection state of an electrical connector, and a power device provided with the above detection device for the connection state of an electrical connector. Background Technique

[0002] In the power system, in order to ensure the safety and reliability of the high-voltage system, high-voltage interlock is set to ensure the safety of equipment and personnel. High-voltage interlock is a key safety measure that can prevent unsafe operations in a high-voltage environment, thereby reducing the accident risk.

[0003] High-voltage interlock mainly checks the integrity and continuity of the entire high-voltage system loop through low-voltage signals, identifies abnormal disconnections of the loop, and timely disconnects the control electrical components at the high-voltage input end. Specifically, it uses a low-voltage circuit to monitor the states of high-voltage components, wires, and connectors. When an abnormal disconnection in the high-voltage circuit is detected, the high voltage of the system is cut off to protect the safety of personnel.

[0004] Therefore, it is necessary to detect the connection state of the electrical connector of the high-voltage interlock to ensure the normal operation of the high-voltage interlock. The current detection methods for high-voltage interlock are mainly the PWM wave scheme and the constant current source scheme. Among them, the basic principle of the constant current source scheme is to send high-level or low-level signals to the detection unit through a hardware interface, and at the same time, the potential of another interface is detected in real time to determine whether the high-voltage interlock is disconnected. The PWM wave scheme is to send signals through pulse width modulation technology, and the duty cycle of the PWM signal is detected in real time at another interface to determine whether the high-voltage interlock is disconnected.

[0005] However, the fault diagnosis of the constant current source scheme is difficult, especially in a complex system, it is difficult to locate the specific position of the fault point, the maintenance requirements are high, and the response time is long; the detection of the PWM wave scheme may be misjudged due to electromagnetic signal interference, and it is difficult to accurately determine the specific position of the fault point. Therefore, the constant current source scheme and the PWM scheme are not conducive to improving the quality of high-voltage interlock detection. Content of the Utility Model

[0006] In view of this, the purpose of the present utility model is to propose a detection circuit for the connection state of an electrical connector, so as to facilitate improving the quality of high-voltage interlock detection by detecting the connection state of the electrical connector.

[0007] To achieve the above object, the technical solution of the present utility model is realized as follows:

[0008] A detection circuit for the connection state of an electrical connector, used for detecting the connection state of an electrical connector, the detection circuit includes:

[0009] A signal injection unit, which is used to inject a detection signal into a detection circuit;

[0010] A detection unit, which is used to output a judgment signal according to the detection signal;

[0011] An acquisition unit, which is used to acquire the judgment signal to judge the connection state of the electrical connector;

[0012] When the acquisition unit detects the judgment signal, it is judged that the electrical connector is disconnected; when the acquisition unit does not detect the judgment signal, it is judged that the electrical connector is connected.

[0013] Further, the signal injection unit includes a first resistor, a first triode, a second resistor, a second triode, a third resistor, a fourth resistor, and a first light-emitting diode;

[0014] The first end of the first resistor is connected to the acquisition unit, the second end of the first resistor is connected to the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is connected to the first end of the second resistor, the second end of the second resistor is connected to the base of the second triode, the emitter of the second triode is connected to a first power supply unit, the first end of the third resistor is commonly connected to the base of the second triode, the second end of the third resistor is commonly connected to the first power supply unit, the collector of the second triode is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the positive electrode of the first light-emitting diode, and the negative electrode of the first light-emitting diode is grounded.

[0015] Further, the first power supply unit is a 12V power supply or a 5V power supply.

[0016] Further, the detection unit includes a fifth resistor and a first photosensitive diode;

[0017] The first end of the fifth resistor is connected to a second power supply unit, the second end of the fifth resistor is connected to the positive electrode of the first photosensitive diode, and the negative electrode of the first photosensitive diode is grounded.

[0018] Further, the second power supply unit is a 5V power supply.

[0019] Further, the acquisition unit is an MCU, the GPIO0 port of the MCU is connected to the signal injection unit, and the GPIO1 port of the MCU is connected to the detection unit.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] The connection state detection circuit of the electrical connector described in the present utility model injects a detection signal through a signal injection unit, outputs a judgment signal through a detection unit, and detects the judgment signal through a collection unit, thereby accurately judging the connection state of the electrical connector, which is conducive to judging the on-off situation in the circuit through the connection state of the electrical connector, and is conducive to design and implementation.

[0022] The setting of the light-emitting diode makes the injection of the detection signal of the signal injection unit simpler, and the signal injection unit can be connected to the collection unit and regulated by the collection unit, which is conducive to design and implementation.

[0023] The detection unit uses a photosensitive diode, which is conducive to receiving the detection signal, and the on-off of the photosensitive diode can be used to output the judgment signal, enabling the collection unit to better collect the judgment signal.

[0024] The cooperation of the light-emitting diode and the photosensitive diode enables the detection circuit to more accurately judge the connection state of the electrical connector and the position of the faulty electrical connector, which is conducive to design and implementation.

[0025] The setting of the MCU enables the collection unit to better regulate the signal injection unit and better collect the judgment signal output by the detection unit, and the MCU is convenient for the detection circuit to cooperate with other circuit structures.

[0026] Meanwhile, the present utility model also proposes an electrical connector connection state detection device, and the detection device is configured with the electrical connector connection state detection circuit as described above; the signal injection unit and the detection unit of the detection circuit are respectively arranged on two opposite sides of the fixed end of the electrical connector.

[0027] In addition, the present utility model also proposes a power device, and the power device is provided with the electrical connector connection state detection device as described above.

[0028] The electrical connector connection state detection device and the power device described in the present utility model have the same beneficial effects as the electrical connector connection state detection circuit as described above compared with the prior art, so they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0030] Figure 1 It is a schematic diagram of the composition of the electrical connector connection state detection circuit described in the embodiment of the present utility model;

[0031] Figure 2Circuit diagram of the electrical connector connection state detection circuit described in the embodiments of the present utility model;

[0032] Figure 3 Structural schematic diagram of the electrical connector connection state detection device described in the embodiments of the present utility model;

[0033] Explanation of reference numerals:

[0034] 10. Signal injection unit; 20. Detection unit; 30. Acquisition unit; 40. Fixed end;

[0035] R1. First resistor; R2. Second resistor; R3. Third resistor; R4. Fourth resistor; R5. Fifth resistor; Q1. First triode; Q2. Second triode; VD1. First light-emitting diode; V1. First photosensitive diode. Specific implementation manners

[0036] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0037] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In addition, the electrical connector in this embodiment may be, for example, a plug and a socket.

[0039] Furthermore, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood in combination with specific situations.

[0040] Hereinafter, the present utility model will be described in detail with reference to the drawings and in combination with the embodiments.

[0041] Embodiment 1

[0042] This embodiment relates to a connection state detection circuit for an electrical connector, which is conducive to improving the quality of high-voltage interlock detection by detecting the connection state of the electrical connector.

[0043] In terms of the overall structure, in combination with Figure 1 As shown, the connection state detection circuit for the electrical connector in this embodiment is used for detecting the connection state of the electrical connector. The detection circuit includes: a signal injection unit 10, which is used to inject a detection signal into the detection circuit. A detection unit 20, which is used to output a judgment signal according to the detection signal. A collection unit 30, which is used to collect the judgment signal to judge the connection state of the electrical connector. When the collection unit 30 detects the judgment signal, it is judged that the electrical connector is disconnected. When the collection unit 30 does not detect the judgment signal, it is judged that the electrical connector is connected.

[0044] With the above settings, the connection state detection circuit for the electrical connector in this embodiment injects a detection signal through the signal injection unit 10, outputs a judgment signal through the detection unit 20, and detects the judgment signal through the collection unit 30, so as to accurately judge the connection state of the electrical connector, which is conducive to judging the on-off situation in the circuit through the connection state of the electrical connector, and is conducive to the design and implementation.

[0045] In order to better inject the detection signal, in combination with Figure 2 As shown, the signal injection unit 10 of the connection state detection circuit for the electrical connector in this embodiment includes a first resistor R1, a first triode Q1, a second resistor R2, a second triode Q2, a third resistor R3, a fourth resistor R4, and a first light-emitting diode VD1.

[0046] Among them, the first end of the first resistor R1 is connected to the collection unit 30, the second end of the first resistor R1 is connected to the base of the first triode Q1, the emitter of the first triode Q1 is grounded, the collector of the first triode Q1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the base of the second triode Q2, the emitter of the second triode Q2 is connected to the first power supply unit, the first end of the third resistor R3 is commonly connected to the base of the second triode Q2, the second end of the third resistor R3 is commonly connected to the first power supply unit, the collector of the second triode Q2 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the positive electrode of the first light-emitting diode VD1, and the negative electrode of the first light-emitting diode VD1 is grounded. The setting of the light-emitting diode makes the injection of the detection signal of the signal injection unit 10 simpler, and the signal injection unit 10 can be connected to the collection unit 30 and can be regulated by the collection unit 30, which is conducive to the design and implementation.

[0047] Specifically, the first power supply unit in this embodiment is a 12V power supply or a 5V power supply. When the acquisition unit 30 outputs current to the base of the first triode Q1, causing the first triode Q1 to conduct, the base of the second triode Q2 receives current, causing the second triode Q2 to conduct. The current of the first power supply unit flows to the first light-emitting diode VD1, and the first light-emitting diode VD1 emits light to output a detection signal.

[0048] For better output of the judgment signal, in combination with Figure 2 As shown, the detection unit 20 of the electrical connector connection state detection circuit in this embodiment includes a fifth resistor R5 and a first photosensitive diode V1.

[0049] Among them, the first end of the fifth resistor R5 is connected to the second power supply unit, the second end of the fifth resistor R5 is connected to the positive electrode of the first photosensitive diode V1, and the negative electrode of the first photosensitive diode V1 is grounded. The detection unit 20 uses a photosensitive diode, which is conducive to receiving the detection signal, and the on-off of the photosensitive diode can realize the output of the judgment signal, so that the acquisition signal can better acquire the judgment signal.

[0050] Specifically, the second power supply unit in this embodiment is a 5V power supply. When the first photosensitive diode V1 receives the light from the first light-emitting diode VD1, the first photosensitive diode V1 conducts, causing the detection unit 20 to conduct. At this time, the acquisition unit 30 does not acquire the judgment signal. When the first photosensitive diode V1 does not conduct, the acquisition unit 30 can acquire the judgment signal at this time.

[0051] In addition, the electrical connector connection state detection circuit in this embodiment may include multiple light-emitting diodes and photosensitive diodes. The positive electrodes of the multiple light-emitting diodes are connected in series to the negative electrode of the previous light-emitting diode. The number of photosensitive diodes and the number of light-emitting diodes are set corresponding to the number of electrical connectors.

[0052] In the electrical connector connection state detection circuit in this embodiment, through the cooperation of the light-emitting diode and the photosensitive diode, the detection circuit can more accurately judge the connection state of the electrical connector and the position of the faulty electrical connector, which is conducive to design and implementation.

[0053] For facilitating the regulation of the signal injection unit 10 and acquiring the judgment signal, in combination with Figure 2 As shown, the acquisition unit 30 of the electrical connector connection state detection circuit in this embodiment is an MCU. The GPIO0 port of the MCU is connected to the signal injection unit 10, and the GPIO1 port of the MCU is connected to the detection unit 20. Through the setting of the MCU, the acquisition unit 30 can better regulate the signal injection unit 10 and better acquire the judgment signal output by the detection unit 20. And the acquisition unit 30 being an MCU facilitates the cooperation of the detection circuit with other circuit structures.

[0054] Combination Figure 3 As shown, when the fixed end 40 and the free end of the electrical connector are connected, due to the shielding of the free end, the detection signal of the signal injection unit 10 cannot be detected by the detection unit 20. Therefore, the detection unit 20 cannot output a judgment signal, and thus the acquisition unit 30 cannot acquire the judgment signal, so it can be judged that the electrical connector is connected. When the fixed end 40 and the free end of the electrical connector are disconnected, since the free end does not shield, the detection signal of the signal injection unit 10 can be detected by the detection unit 20. Therefore, a judgment signal can be output, and the acquisition unit 30 acquires the judgment signal, so it is judged that the electrical connector is disconnected.

[0055] The electrical connector connection state detection circuit in this embodiment can independently detect the connection state of the electrical connector in the circuit, which helps to judge the connection states of multiple electrical connectors in the high-voltage interlock, and can determine the position of the disconnected electrical connector in the circuit according to the setting positions of the signal injection unit 10 and the detection unit 20 in the detection circuit.

[0056] Embodiment 2

[0057] This embodiment relates to an electrical connector connection state detection device, and the detection circuit in the detection device is configured with the electrical connector connection state detection circuit in Embodiment 1. The signal injection unit 10 and the detection unit 20 of the detection circuit are respectively arranged on two opposite sides of the fixed end 40 of the electrical connector.

[0058] The electrical connector connection state detection device of this embodiment can better detect the connection state of the electrical connector in the circuit through the setting of the electrical connector connection state detection circuit in Embodiment 1, and can determine the position of the disconnected electrical connector, which is beneficial to judging the connection state of the electrical connector and the position of the disconnected electrical connector in the high-voltage interlock, thereby improving the quality of the high-voltage interlock detection.

[0059] Embodiment 3

[0060] This embodiment relates to a power device, and the power device is provided with the electrical connector connection state detection device in Embodiment 2.

[0061] The power device of this embodiment can better detect the connection states of the electrical connectors in the high-voltage interlock through the setting of the electrical connector connection state detection device in Embodiment 2, and can determine the position of the disconnected electrical connector according to the setting position of the electrical connector connection state detection device, which is beneficial to the detection of the high-voltage interlock and improves the quality of the high-voltage interlock detection.

[0062] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electrical connector connection state detection circuit for detecting the connection state of an electrical connector, characterized in that, The detection circuit includes: A signal injection unit for injecting a detection signal into the detection circuit; A detection unit for outputting a judgment signal according to the detection signal; An acquisition unit for acquiring the judgment signal to judge the connection state of the electrical connector; When the acquisition unit detects the judgment signal, it is judged that the electrical connector is disconnected, and when the acquisition unit does not detect the judgment signal, it is judged that the electrical connector is connected.

2. The electrical connector connection state detection circuit according to claim 1, characterized in that: The signal injection unit includes a first resistor, a first triode, a second resistor, a second triode, a third resistor, a fourth resistor and a first light-emitting diode; The first end of the first resistor is connected to the acquisition unit, the second end of the first resistor is connected to the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is connected to the first end of the second resistor, the second end of the second resistor is connected to the base of the second triode, the emitter of the second triode is connected to the first power supply unit, the first end of the third resistor is commonly connected to the base of the second triode, the second end of the third resistor is commonly connected to the first power supply unit, the collector of the second triode is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the positive electrode of the first light-emitting diode, and the negative electrode of the first light-emitting diode is grounded.

3. The electrical connector connection state detection circuit according to claim 2, characterized in that: The first power supply unit is a 12V power supply or a 5V power supply.

4. The electrical connector connection state detection circuit according to claim 2, characterized in that: The detection unit includes a fifth resistor and a first photosensitive diode; The first end of the fifth resistor is connected to the second power supply unit, the second end of the fifth resistor is connected to the positive electrode of the first photosensitive diode, and the negative electrode of the first photosensitive diode is grounded.

5. The electrical connector connection state detection circuit according to claim 4, characterized in that: The second power supply unit is a 5V power supply.

6. The electrical connector connection state detection circuit according to claim 1, characterized in that: The acquisition unit is an MCU, the GPIO0 port of the MCU is connected to the signal injection unit, and the GPIO1 port of the MCU is connected to the detection unit.

7. An electrical connector connection state detection device, characterized in that: The detection device is configured with an electrical connector connection state detection circuit as described in any one of claims 1-6; The signal injection unit and the detection unit of the detection circuit are respectively arranged on two opposite sides of the fixed end of the electrical connector.

8. A power device, characterized in that: The power device is provided with an electrical connector connection state detection device as described in claim 7.

Images