CN220085037U - Plug connector detection circuit and automobile circuit system - Google Patents
Plug connector detection circuit and automobile circuit system Download PDFInfo
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- CN220085037U CN220085037U CN202321485694.3U CN202321485694U CN220085037U CN 220085037 U CN220085037 U CN 220085037U CN 202321485694 U CN202321485694 U CN 202321485694U CN 220085037 U CN220085037 U CN 220085037U
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Abstract
The present disclosure provides a plug connector detection circuit and automotive circuitry. The plug connector detection circuit comprises a signal generation circuit and a detection circuit. The signal generating circuit is connected with one end of the plug connector and is used for sending a detection signal with preset frequency to the plug connector. The detection circuit is connected with the other end of the plug connector and is used for detecting the frequency of the received signal passing through the plug connector from the detection signal. The plug connector detection circuit and the automobile circuit system send detection signals to the plug connector through the signal generation circuit, the detection circuit determines the receiving signals of the detection signals after passing through the plug connector, and the conducting state of the plug connector is determined by judging the frequency of the receiving signals, so that the plug connector can be detected to be in different conducting states such as conducting, disconnecting or time-break and the like, and the problem of poor contact of the plug connector is effectively solved.
Description
Technical Field
The disclosure relates to the field of automobile circuits, in particular to a plug connector detection circuit and an automobile circuit system.
Background
In the automobile circuit system, the number of connectors is very large, especially in the new energy automobile with replaceable batteries, the connection between the batteries and the motor is certainly a separable connector, the reliability of the connector is necessarily very high, and therefore, the detection of the connection of the connector is particularly critical.
In order to ensure reliable connection of connectors, it is conventional practice to add a pair of connectors in the design of the connector, and then detect the on/off of the pair of connectors to determine whether the entire connector is reliably connected. Specifically, the method for detecting the on/off of the butt joint member is that one end is given with a high level or a low level, the other end detects whether the levels are consistent, the connection is considered as the consistency, and the disconnection is considered as the inconsistency. The method has the defect that when the detection interface circuit fails, the level entering the detection system can be kept high or low all the time; when the connector is released, the system does not detect whether the connector is conductive.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a plug-in unit detection circuit and an automobile circuit system for detecting the conductive state of a plug-in unit.
To this end, the present disclosure first provides a plug connector detection circuit for detecting a plug connector, including:
the signal generation circuit is connected with one end of the plug connector and is used for sending a detection signal with preset frequency to the plug connector;
and the detection circuit is connected with the other end of the plug connector and is used for detecting the frequency of the received signal passing through the plug connector from the detection signal.
The plug connector detection circuit further comprises a signal amplification circuit, wherein the signal generation circuit is connected with the plug connector through the signal amplification circuit, and the signal amplification circuit is used for amplifying the amplitude of the detection signal.
According to the plug connector detection circuit, the detection circuit comprises a receiving resistor, one end of the receiving resistor is connected with a power supply, and the other end of the receiving resistor is connected with the plug connector.
According to the plug connector detection circuit, the detection circuit comprises a receiving controller, and a receiving pin of the receiving controller is connected with the receiving resistor and the plug connector.
According to the plug connector detection circuit, the signal generation circuit further comprises a generation controller, and an output pin of the generation controller is connected with the signal amplification circuit to output the detection signal.
In addition, the present disclosure also provides an automobile circuit system, including the plug connector detection circuit.
Moreover, the present disclosure further provides a method for detecting a plug connector, including the steps of:
sending a detection signal to the plug connector;
receiving a receiving signal of the detection signal conducted by the plug connector;
and detecting the frequency of the received signal, and determining whether the connection of the plug connector is normal according to the frequency.
According to the plug connector detection method, determining whether the connection of the plug connector is normal according to the frequency comprises: if the frequency of the received signal is zero, determining that the resistance of the plug connector is abnormal; and if the difference between the frequency of the received signal and the frequency of the detection signal is within a preset range, determining that the plug connector is in a conducting state.
According to the plug connector detection method, the abnormal resistance value of the plug connector comprises the state that the plug connector is in a disconnected state or the contact resistance of the plug connector exceeds a preset value or a detection circuit for detecting the received signal has faults.
According to the plug connector detection method, determining whether the connection of the plug connector is normal according to the frequency further includes: and if the change value of the frequency exceeds a preset value, determining that the plug connector is in a time-on and time-off state.
According to the plug connector detection method, the detection signal is a pulse signal with fixed frequency.
Compared with the prior art, the plug connector detection circuit and the automobile circuit system send detection signals to the plug connector through the signal generation circuit, the detection circuit determines the receiving signals of the detection signals after passing through the plug connector, and the conducting state of the plug connector is determined by judging the frequency of the receiving signals, so that the plug connector can be detected to be in different conducting states such as conducting, disconnecting or time-break, and the like, and the problem of poor contact of the plug connector is effectively solved.
Drawings
In order to more clearly illustrate the embodiments, the drawings that are required to be used in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are some examples of the present disclosure and that other drawings may be obtained from these drawings by persons of ordinary skill in the art without inventive work.
Fig. 1 is a schematic circuit diagram of a plug-in unit detection circuit.
Fig. 2 is a flow chart of a plug connector detection method.
Description of the main reference signs
| Controller for controlling a power supply | 10 |
| Signal amplifying circuit | 20 |
| Plug-in connector | 30 |
| Receiving resistor | 40 |
| Power supply | 41 |
The following detailed description will further illustrate the disclosure in conjunction with the above-described drawings.
Detailed Description
In order that the above-recited objects, features and advantages of the present disclosure may be more clearly understood, a detailed description of the present disclosure will be rendered by reference to the appended drawings and appended drawings. The embodiments of the present utility model and the features in the embodiments may be combined with each other without collision. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, and the described embodiments are merely some, rather than all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.
In various embodiments, for ease of description and not limitation of the present disclosure, the term "coupled" as used in the specification and claims of this disclosure is not limited to a physical or mechanical connection, but may include an electrical connection, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship is changed accordingly.
Fig. 1 is a schematic circuit diagram of a plug-in unit detection circuit. As shown in fig. 1, the plug connector detection circuit is used for detecting the plug connector 30, and comprises a signal generation circuit, a signal amplification circuit 20 and a detection circuit, wherein a detection signal generated by the signal generation circuit passes through the plug connector 30 to form a receiving signal, and the detection circuit determines the conducting state of the plug connector 30 according to the frequency values of the detection signal and the receiving signal after detecting the receiving signal.
The signal generating circuit is connected to one end of the plug 30, and the signal generating circuit is configured to send a detection signal with a preset frequency to the plug 30. As an example, the signal generating circuit further includes a generating controller, and an output pin of the generating controller is connected to the signal amplifying circuit 20 to output the detection signal. For example, the generating controller may be a single chip microcomputer, a microprocessor, etc., and the preset pins are set in a software programming mode to output the detection signals. However, those skilled in the art will understand that the signal generating circuit may also form a signal oscillating circuit by connecting electronic components such as a capacitor, a resistor, and an inductor, so as to output a detection signal with a preset frequency. As an example, the detection signal is a pulse signal of a fixed frequency, and the signal output is simple and easy to set. But other types of detection signals may be employed by those skilled in the art, such as triangular waveform signals, sine wave signals, etc.
The signal generating circuit is connected to the plug 30 through the signal amplifying circuit 20, and the signal amplifying circuit 20 is used for amplifying the amplitude of the detection signal. In this embodiment, the signal generating circuit includes an NPN-type transistor, a base of which is connected to the signal generating circuit, specifically, to an output pin of the generating controller; the emitter is grounded and the collector is connected to one end of the plug 30.
A detection circuit is connected to the other end of the plug 30 for detecting the frequency of the reception signal from the detection signal through the plug 30. The detection circuit comprises a receiving resistor 40, one end of the receiving resistor 40 is connected with a power supply 41, and the other end of the receiving resistor is connected with the plug connector 30. In this embodiment, the detection circuit includes a receiving controller, and a receiving pin of the receiving controller is connected to the receiving resistor 40 and the plug 30, and the receiving controller detects the frequency of the received signal through the receiving pin. Obviously, in the case of a reliable connection of the plug 30, the detection signal can pass completely through the plug 30, so that the reception signal has the same frequency as the detection signal; in the case of an unreliable connection of the plug 30, the detection signal cannot pass completely through the plug 30, so that a difference between the frequency of the received signal and the frequency of the detection signal results. In the present embodiment, the generation controller and the reception controller are the same controller 10, but in other embodiments, they may be different controllers.
In addition, the utility model provides an automobile circuit system which comprises the plug connector detection circuit, and the automobile circuit system can detect the conduction condition of the plug connector 30 through the plug connector detection circuit, so that the connection reliability of the plug connector 30 can be improved.
Fig. 2 is a flowchart of a plug 30 detection method. As shown in fig. 2, the method for detecting the plug 30 is used for detecting the reliability of the connection of both ends of the plug 30 after the plug 30 is plugged. Specifically, in the present embodiment, the method for detecting the socket 30 includes steps S01 to S03.
Step S01: a detection signal is sent to the plug 30, which is a pulse signal of a fixed frequency.
Step S02: and receiving the receiving signal of the detection signal conducted by the plug connector 30.
Step S03: the frequency of the received signal is detected, and it is determined whether the connection of the plug connector 30 is normal or not based on the frequency. Specifically, at least one of the following cases exists as a result of detecting the received signal:
(1) If the frequency of the received signal is zero, it is determined that the resistance of the plug 30 is abnormal. The abnormal resistance value of the plug 30 includes that the plug 30 is in a disconnected state or the contact resistance of the plug 30 exceeds a preset value, namely, the excessive resistance is relieved; or the received signal is high or low due to a fault in the detection circuit, and the frequency detected is zero.
(2) If the difference between the frequency of the received signal and the frequency of the detected signal is within a preset range, it is determined that the plug 30 is normally connected. In particular, the preset range may be set to be almost equal to zero under comparison, i.e., when the connectors are reliably connected, the frequency difference between the detected received signal and the emitted detected signal is almost zero, and the frequency calculated by analysis is stable and accurate.
(3) If the frequency change exceeds a preset value, the plug connector 30 is determined to be in a time-on-time-off state, and the frequency value of the received signal is in a jumping state.
The plug connector detection circuit and the automobile circuit system send detection signals to the plug connector 30 through the signal generation circuit, the detection circuit determines receiving signals of the detection signals after passing through the plug connector 30, and the conducting state of the plug connector 30 is determined by judging the frequency of the receiving signals, so that different conducting states of the plug connector 30 such as on, off or time-off can be detected, and the problem of poor contact of the plug connector is effectively solved.
In the several specific implementations provided in the present disclosure, it will be apparent to those skilled in the art that the present disclosure is not limited to the details of the above-described exemplary embodiments, and that the present disclosure may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the disclosure being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. The terms first, second, etc. are used to denote a name, but not any particular order.
The above embodiments are merely for illustrating the technical aspects of the present disclosure, and although the present disclosure has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical aspects of the present disclosure.
Claims (6)
1. A plug connector detection circuit for detecting a plug connector, comprising:
the signal generation circuit is connected with one end of the plug connector and is used for sending a detection signal with preset frequency to the plug connector;
and the detection circuit is connected with the other end of the plug connector and is used for detecting the frequency of the received signal passing through the plug connector from the detection signal.
2. The plug connector detection circuit of claim 1, further comprising a signal amplification circuit, wherein the signal generation circuit is coupled to the plug connector through the signal amplification circuit, wherein the signal amplification circuit is configured to amplify an amplitude of the detection signal.
3. The plug connector detection circuit of claim 2, wherein the detection circuit includes a receiving resistor having one end connected to a power source and the other end connected to the plug connector.
4. A plug connector detection circuit according to claim 3, wherein the detection circuit comprises a receiving controller, a receiving pin of the receiving controller connecting the receiving resistor and the plug connector.
5. The plug connector detection circuit of claim 4, wherein the signal generation circuit further comprises a generation controller, an output pin of the generation controller being connected to the signal amplification circuit to output the detection signal.
6. Automotive electrical circuit system, characterized by comprising a plug connector detection circuit according to any of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321485694.3U CN220085037U (en) | 2023-06-11 | 2023-06-11 | Plug connector detection circuit and automobile circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321485694.3U CN220085037U (en) | 2023-06-11 | 2023-06-11 | Plug connector detection circuit and automobile circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220085037U true CN220085037U (en) | 2023-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321485694.3U Active CN220085037U (en) | 2023-06-11 | 2023-06-11 | Plug connector detection circuit and automobile circuit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220085037U (en) |
-
2023
- 2023-06-11 CN CN202321485694.3U patent/CN220085037U/en active Active
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