CN111693819B - Detection method and device - Google Patents

Abstract

A detection method is used for detecting a cable bundle comprising a plurality of cables, wherein a first end of the cable bundle is connected with a first connector, and a second end of the cable bundle is connected with a second connector. The detection method comprises the following steps: applying a direct-current voltage excitation signal to each cable of the cable bundle in sequence through the first connector, and detecting a voltage value of the cable under the direct-current voltage excitation signal through the second connector; and determining the on-off condition of the cable according to the voltage value of the cable under the direct-current voltage excitation signal.

Description

Detection method and device

technical field

This article relates to but not limited to the technical field of automatic testing, especially a testing method and device.

Background technique

At present, cable harnesses can be widely used in various types of electronic equipment, and can be used in various scenarios. However, in battlefields or training grounds, and field work sites far away from technical support, etc., the cable harness is prone to being bitten by mice or injured by accidental external forces. Quickly determining and repairing the disconnection of the cable harness is of great significance for restoring the functions of electronic equipment (or equipment).

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

The disclosure provides a detection method and device.

In one aspect, the present disclosure provides a detection method for detecting a cable harness including a plurality of cables, a first end of the cable harness is connected to a first connector, and a second end of the cable harness is A second connector is connected. The detection method includes: sequentially applying a DC voltage excitation signal to each cable of the cable bundle through the first connector, and detecting the voltage of the cable at the DC voltage through the second connector. The voltage value under the excitation signal; according to the voltage value of the cable under the DC voltage excitation signal, determine whether the cable is on or off.

In another aspect, the present disclosure provides a detection device for detecting a cable harness including a plurality of cables, a first end of the cable harness is connected to a first connector, a second end of the cable harness is The end is connected with a second connector. The detection device includes: an excitation signal application circuit, a response signal detection circuit, and a detection control unit; the excitation signal application circuit is used to sequentially send to the A DC voltage excitation signal is applied to each cable of the cable bundle; the response signal detection circuit is configured to, under the control of the detection control unit, detect that the cable is in the DC voltage through the second connector. The voltage value under the excitation signal; the detection control unit is configured to determine whether the cable is on or off according to the voltage value of the cable under the DC excitation signal.

The detection method and device provided in the present disclosure can detect whether a single cable is disconnected for a cable bundle formed by bundling multiple cables, and the detection speed is fast.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure can be realized and obtained through the solutions described in the specification and the accompanying drawings.

Description of drawings

The accompanying drawings are used to provide an understanding of the technical solutions of the present disclosure, and constitute a part of the specification, and are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute limitations to the technical solutions of the present disclosure.

FIG. 1 is a schematic diagram of a cable harness according to at least one embodiment of the present disclosure;

Fig. 2 includes Fig. 2(a) to Fig. 2(c), which are respectively illustration diagrams of a first connector and a second connector according to at least one embodiment of the present disclosure;

FIG. 3 is a flowchart of a detection method in at least one embodiment of the present disclosure;

4 is a schematic diagram of a detection device in at least one embodiment of the present disclosure;

Fig. 5 is a schematic diagram of the principle of a four-way selector;

FIG. 6 is an exemplary diagram of an excitation signal applying circuit in at least one embodiment of the present disclosure;

7 is an exemplary diagram of a response signal detection circuit in at least one embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a detection process of a detection device according to at least one embodiment of the present disclosure.

Detailed ways

The present disclosure describes a number of embodiments, but the description is illustrative rather than restrictive, and it will be apparent to those of ordinary skill in the art that within the scope encompassed by the described embodiments of the present disclosure, There are many more embodiments and implementations. Although many possible combinations of features are shown in the drawings and discussed in the description, many other combinations of the disclosed features are possible. Except where expressly limited, any feature or element of any embodiment may be used in combination with, or substituted for, any other feature or element of any other embodiment.

This disclosure includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The disclosed embodiments, features and elements of this disclosure may also be combined with any conventional feature or element to form unique solutions as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other arrangements to form another unique arrangement as defined by the claims. It is therefore to be understood that any of the features shown or discussed in this disclosure can be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be limited except in accordance with the appended claims and their equivalents. Furthermore, one or more modifications and changes may be made within the scope of protection of the appended claims.

Furthermore, in describing representative embodiments, the specification may have presented a method or process as a particular sequence of steps. However, to the extent the method or process is not dependent on the specific order of steps described herein, the method or process should not be limited to the specific order of steps described. Other sequences of steps are also possible, as will be appreciated by those of ordinary skill in the art. Therefore, the specific order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, claims to the method or process should not be limited to performing their steps in the order written, as those skilled in the art will readily understand that such order can be varied and still remain within the spirit and scope of the disclosed embodiments.

In the drawings, the sizes of constituent elements, layer thicknesses, or regions are sometimes exaggerated for the sake of clarity. Therefore, one aspect of the present disclosure is not necessarily limited to the size, and the shape and size of each component in the drawings do not reflect the true scale. In addition, the drawings schematically show ideal examples, and one aspect of the present disclosure is not limited to shapes, numerical values, and the like shown in the drawings.

Unless otherwise defined, technical terms or scientific terms used in the present disclosure have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. In the present disclosure, "plurality" may mean two or more numbers. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items.

At least one embodiment of the present disclosure provides a detection method and device, which can quickly detect whether a single cable is disconnected for a cable bundle formed by bundling multiple cables.

FIG. 1 is a schematic diagram of a cable harness according to at least one embodiment of the present disclosure. As shown in FIG. 1 , the cable harness 10 may include a plurality of cables 100 . A plurality of cables 100 may be bundled to form a cable bundle 10 . The cable harness 10 may have a first end 101 and a second end 102 . The first end 101 of the cable harness 10 can be connected to a first connector, and the second end 102 of the cable harness 10 can be connected to a second connector.

In some examples, the two ends of each cable 100 in the cable bundle 10 may be soldered to the first connector and the second connector respectively. The cable harness 10 can be fixed on the electronic equipment (or equipment), the first connector and the second connector can be removed from the electronic equipment (or equipment), for example, pluggably set on the electronic equipment (or equipment) )superior.

Fig. 2 includes Fig. 2(a) to Fig. 2(c), which are illustration diagrams of a first connector and a second connector according to at least one embodiment of the present disclosure, respectively. Only one cable 100 of the cable harness is illustrated in FIG. 2 . The number of cables connected between the first connector and the second connector may be less than or equal to the number of connection terminals of the first connector or the second connector. For example, the number of connecting ends of the first connector 11 and the second connector 12 shown in FIG. The number of cables may be less than or equal to 40.

In some examples, as shown in FIG. 2( a ), the first connector 11 may be an aviation plug, and the second connector 12 may be an aviation socket. As shown in FIG. 2( b ), the first connector 11 may be an aviation plug, and the second connector 12 may be an aviation plug. As shown in FIG. 2( c ), the first connector 11 may be an aviation socket, and the second connector 12 may be an aviation socket. When the connector is an aviation plug, the connecting end of the connector can be a pin; when the connector is an aviation socket, the connecting end of the connector can be a jack. In this embodiment, the types of the first connector and the second connector are not limited.

FIG. 3 is a flowchart of a detection method according to at least one embodiment of the present disclosure. The detection method provided in this exemplary embodiment can be used to detect a cable harness including a plurality of cables, and the first end of the cable harness is connected to the first connector, and the second end of the cable harness is connected to the second connector. device.

As shown in Figure 3, the detection method of this exemplary embodiment may include:

Step S1, sequentially applying a DC voltage excitation signal to each cable of the cable bundle through the first connector, and detecting the voltage value of each cable under the DC voltage excitation signal through the second connector;

Step S2, according to the voltage value of the cable under the DC voltage excitation signal, determine whether the cable is on or off.

The detection method provided by this exemplary embodiment can be used to detect a cable bundle bundled by a large number of cables (for example, tens to hundreds of cables) as shown in FIG. 1 . The detection method provided by this exemplary embodiment does not need to unbundle the cable bundle, and does not need to pierce the cable sheath to touch the inner metal for detection, which can be realized only through the first connector and the second connector at both ends of the cable bundle. Quickly detect the continuity of each cable in the cable bundle.

In some exemplary embodiments, step S1 may include: controlling the excitation signal application circuit to sequentially apply a DC voltage excitation signal to each cable of the cable harness through the first connector, and controlling the response signal detection circuit through the second connector Detect the voltage value of the cable under the DC voltage excitation signal.

In some exemplary embodiments, the excitation signal applying circuit may include: a DC voltage source, a first resistor, and a first multiplexer. The first multiplexer may include: an input terminal, a plurality of strobe signal input terminals, and a plurality of output terminals. The DC voltage source can be respectively connected to the first end of the first resistor and the input end of the first multiplexer, the second end of the first resistor can be grounded, and the multiple output ends of the first multiplexer can be connected to the first multiplexer respectively. Multiple connection ends of a connector are connected in one-to-one correspondence. In some examples, the first multiplexer may be implemented by an FPGA (Field Programmable Gate Array, Field Programmable Gate Array). In this exemplary embodiment, the DC voltage excitation signal can be sequentially provided to each cable in the cable bundle through the first multiplexer, which is simple and practical, and supports fast detection of the cable bundle.

In some exemplary implementations, the response signal detection circuit may include: a second multiplexer and a testing subcircuit. The second multiplexer may include: a plurality of input terminals, a plurality of strobe signal input terminals, and an output terminal. The output terminal of the second multiplexer may be connected to the test subcircuit, and the multiple input terminals of the second multiplexer may be respectively connected to the multiple connection terminals of the second connector in one-to-one correspondence. In some examples, the second multiplexer can be implemented by FPGA. In this exemplary embodiment, the second multiplexer can be used to sequentially detect the voltage value of each cable in the cable bundle, and the detection accuracy is high.

In some exemplary embodiments, the testing subcircuit may include: a second resistor, a third resistor and a first capacitor. The first end of the second resistor may be connected to the output end of the second multiplexer, and the second end of the second resistor may be connected to the test output end. The first end of the third resistor can be connected to the test output end, and the second end of the third resistor can be grounded. The first end of the first capacitor can be connected to the test output end, and the second end of the first capacitor can be grounded. In this exemplary embodiment, the detection accuracy and detection stability can be improved by using the test sub-circuit.

In some exemplary embodiments, step S2 may include: when the voltage value of the cable under the DC voltage excitation signal is greater than a threshold, then determining that the cable is not disconnected; when the voltage value of the cable under the DC voltage excitation signal is less than or If it is equal to the threshold, it is determined that the cable is disconnected. In some examples, taking the DC voltage excitation signal as +5V as an example, when the voltage value of the cable under the DC voltage excitation signal is 0V, it is determined that the cable is disconnected; when the cable is under the DC voltage excitation signal If the voltage value is greater than 4V, then confirm that the cable is not disconnected. In this exemplary embodiment, combined with the detection results of the voltage value of each cable, the overall disconnection situation of the cable bundle can be obtained, for example, it can be determined whether there is a disconnection in the cable bundle and which cables are disconnected .

FIG. 4 is a schematic diagram of a detection device according to at least one embodiment of the present disclosure. As shown in FIG. 4 , the detection device provided by this exemplary embodiment can be used to detect a cable harness 10 comprising a plurality of cables, the first end of the cable harness 10 can be connected to a first connector 11, and the cable harness 10 The second end can be connected to the second connector 12 . For example, the first connector 11 may be an aviation plug, and the second connector 12 may be an aviation socket. However, this embodiment does not limit the types of the first connector 11 and the second connector 12 .

As shown in FIG. 4 , the detection device of this exemplary embodiment may include: a detection control unit 20 , an excitation signal application circuit 21 and a response signal detection circuit 22 . Wherein, the excitation signal applying circuit 21 can be used to apply a DC voltage excitation signal to each cable of the cable harness 10 sequentially through the first connector 11 under the control of the detection control unit 20 . The response signal detection circuit 22 can be used to sequentially detect the voltage value of each cable under the DC excitation signal through the second connector 12 under the control of the detection control unit 20 . The detection control unit 20 can be used to determine whether the cable is on or off according to the voltage value of the cable under the DC voltage excitation signal. In some examples, the excitation signal application circuit and the response signal detection circuit can be realized by FPGA, and the detection control unit can be realized by single chip microcomputer. However, this embodiment does not limit it.

In some exemplary implementations, the excitation signal applying circuit 21 may include: a DC voltage source, a first resistor, and a first multiplexer. The first multiplexer may include: an input terminal, a plurality of strobe signal input terminals, and a plurality of output terminals. The DC voltage source can be respectively connected to the first end of the first resistor and the input end of the first multiplexer, the second end of the first resistor can be grounded, and the multiple output ends of the first multiplexer can be connected to the first multiplexer respectively. Multiple connection terminals of a connector are connected in one-to-one correspondence; multiple strobe signal input terminals of the first multiplexer can be connected with the detection control unit.

In some exemplary implementations, the response signal detection circuit 22 may include: a second multiplexer and a testing subcircuit. The second multiplexer may include: a plurality of input terminals, a plurality of strobe signal input terminals, and an output terminal. The output terminal of the second multiplexer can be connected with the test subcircuit, and the multiple input terminals of the second multiplexer can be respectively connected with the multiple connection terminals of the second connector in one-to-one correspondence, and the second multiplexer A plurality of strobe signal input terminals can be connected with the detection control unit.

In some exemplary embodiments, the testing subcircuit may include: a second resistor, a third resistor and a first capacitor. The first end of the second resistance can be connected with the output end of the second multiplexer, the second end of the second resistance can be connected with the test output end; the first end of the third resistance can be connected with the test output end, and the third The second end of the resistor can be grounded; the first end of the first capacitor can be connected to the test output end, and the second end of the first capacitor can be grounded.

FIG. 5 is a schematic diagram of the principle of a four-way selector. As shown in FIG. 5 , D ₀ , D ₁ , D ₂ , and D ₃ can be four output terminals, Y can be an input terminal, and A ₀ and A ₁ can be input terminals of a strobe signal. By inputting a strobe signal to the strobe signal input terminals A ₀ and A ₁ , any one of the four output terminals D ₀ , D ₁ , D ₂ , and D ₃ can be selected, and the data at the input terminal Y can be output to the selected The output terminal, so that the multi-channel time-sharing transmission of data can be realized. The principles of single-input-multiple-output and multiple-input-single-output multiplexers are similar, so details will not be repeated here.

FIG. 6 is an exemplary diagram of an excitation signal applying circuit according to at least one embodiment of the present disclosure. As shown in FIG. 6 , the excitation signal applying circuit of this exemplary embodiment may include: a DC voltage source, a first resistor R ₁ and a first multiplexer 210 . The first multiplexer 210 may include: an input terminal Y, multiple strobe signal input terminals (for example, A ₀ to A _m , m can be an integer greater than 1) and multiple output terminals (for example, IN ₁ to IN _n , n can be an integer greater than 1). The DC voltage source can be respectively connected to the first terminal of the first resistor _R1 and the input terminal Y of the first multiplexer 210, and the second terminal of the first resistor _R1 can be grounded. Multiple output terminals of the first multiplexer 210 may be respectively connected to multiple connection terminals of the first connector in a one-to-one correspondence. Multiple output terminals of the first multiplexer 210 may be connected to the cable harness 10 through a first connector. A plurality of gate signal input terminals of the first multiplexer 210 may be connected to the detection control unit for receiving gate signals from the detection control unit.

In some examples, the first multiplexer 210 may be implemented using FPGA. However, this embodiment does not limit it.

In this exemplary embodiment, the DC voltage source may be a +5V DC voltage source. The resistance value of the first resistor R ₁ may be 10 kohms. The detection control unit can control the first multiplexer 210 by connecting the gate signal input terminal, so that the DC voltage excitation signal generated by the DC voltage source can respectively connect the first end of each cable in the cable bundle 10 . In this example, under the control of the detection control unit, all the cables in the cable bundle 10 can receive the DC voltage excitation signal sequentially in a certain order, and the duration of the DC voltage excitation signal applied to each cable can be 10 milliseconds until all cables are traversed.

FIG. 7 is an example diagram of a response signal detection circuit according to at least one embodiment of the present disclosure. As shown in FIG. 7 , the response signal detection circuit of this exemplary embodiment may include: a second multiplexer 220 and a test sub-circuit 221 . The second multiplexer 220 may include: a plurality of input terminals (for example, IN ₁ to IN _n , n may be an integer greater than 1), a plurality of strobe signal input terminals (for example, A ₀ to A _m , m may is an integer greater than 1) and an output Y. The output terminal Y of the second multiplexer 220 can be connected to the testing subcircuit 221 . Multiple input terminals of the second multiplexer 220 may be respectively connected to multiple connection terminals of the second connector in a one-to-one correspondence. Multiple input terminals of the second multiplexer 220 can be connected to the cable harness 10 through second connectors. A plurality of gate signal input terminals of the second multiplexer 220 may be connected to the detection control unit. The testing sub-circuit 221 may include: a second resistor R ₂ , a third resistor R ₃ and a first capacitor C ₁ . The first end of the second resistor _R2 can be connected to the output terminal Y of the second multiplexer 220 , and the second end of the second resistor _R2 can be connected to the test output terminal S. The first end of the third resistor _R3 can be connected to the test output terminal S, and the second end of the third resistor _R3 can be grounded. The first terminal of the first capacitor _C1 can be connected to the test output terminal S, and the second terminal of the first capacitor _C1 can be grounded.

In some examples, the second multiplexer 220 may be implemented using FPGA. However, this embodiment does not limit it.

In this exemplary embodiment, the voltage value of the cable under the DC voltage excitation signal can be obtained from the connection point between the second resistor R ₂ and the third resistor R ₃ , that is, the test output terminal S. In the response signal detection circuit, the resistance value of the second resistor _R2 can be 1 kohm, the resistance value of the third resistor _R3 can be 10 kohm, and the capacitance value of the first capacitor _C1 can be 10 nanofarads (nf) . The first-order dynamic circuit formed by the third resistor _R3 and the first capacitor _C1 has a charging time constant of about 10 microseconds and a discharging time constant of 100 microseconds (ie 0.1 milliseconds). Using the test subcircuit provided by this exemplary embodiment can ensure that the voltage value detected from the test output terminal is not affected by high-frequency interference signals. Moreover, the duration of the continuous application of the DC voltage excitation signal on each cable can be 10 milliseconds, and correspondingly, the duration of the acquisition at the test output terminal can be 8 milliseconds, so that the stability and accuracy of voltage value detection can be ensured Rate.

The first cable in the detection cable bundle 10 is taken as an example for illustration. In this example, when the first cable of the cable bundle 10 is detected, the first multiplexer 210 shown in FIG. 6 connects the DC voltage source and the first cable under the control of the detection control unit The second multiplexer 220 shown in FIG. 7 is connected to the second end of the first cable and the test sub-circuit 221 under the control of the detection control unit. Wherein, the detection control unit can respectively provide the gate signal to the gate signal input terminals of the first multiplexer 210 and the second multiplexer 220, so as to apply a 5V DC voltage to the first end of the first cable, And start auto-detection on the second end of the first cable. The duration of the DC voltage excitation signal can be 10 milliseconds, and the automatic test of the response signal at the second end of the first cable can start after applying the DC voltage excitation signal and delaying it for 1 millisecond to ensure that the detected voltage value is stable and reliable , and then end after the second end of the first cable continues to collect for 8 milliseconds. In some examples, when the voltage value detected by the second end of the first cable is 4.55 volts, it means that the first cable is not disconnected. If there is a disconnection in the first cable, the second end of the first cable must not receive the excitation voltage, and the detected voltage value at this time may be 0 volts. In the case of a disconnection in the first cable, even if an interference signal enters the test sub-circuit, since the capacitance energy cannot change suddenly, it can be ensured that the detected voltage value is still 0 volts. Moreover, even if the test sub-circuit induces an interfering voltage signal, the discharge circuit composed of the third resistor _R3 and the first capacitor _C1 will be automatically released at any time, so that the detected voltage value is still 0 volts. In this exemplary embodiment, the accuracy and stability of the detection result can be improved by setting the test sub-circuit.

In this exemplary embodiment, the detection duration of the entire cable bundle may be determined by the duration of application of the DC voltage excitation signal. Taking a cable bundle including 512 cables as an example, it only takes about 6 seconds to complete the detection of all cables, which can realize fast detection.

In some exemplary implementations, the detection device of this embodiment may further include: a first switching unit and a second switching unit. The first switching unit can be used to connect the first connector and the excitation signal applying circuit. The second switching unit can be used to connect the second connector and the response signal detection circuit. Wherein, the number of transfer terminals of the first transfer unit and the second transfer unit may be greater than or equal to the number of cables of the cable harness. However, this embodiment does not limit it. In this exemplary embodiment, an adapter unit is set to connect the first connector and the second connector for detection, which can be applied to the take-out length of the first connector and the second connector due to the cable harness being fixed on the electronic equipment Limited detection scenarios.

FIG. 8 is a schematic diagram of a detection process of a detection device according to at least one embodiment of the present disclosure. In this exemplary embodiment, the detection device may include: a first switching unit, a second switching unit, an excitation signal application circuit, a detection control unit, and a response signal detection circuit. Wherein, the first conversion unit may include a first universal conversion board and a first conversion cable; the second conversion unit may include a second universal conversion board and a second conversion cable. The excitation signal applying circuit can be shown in FIG. 6 . The response signal detection circuit may be shown in FIG. 7 . The core function of the first universal adapter board and the second universal adapter board is to realize unified transfer processing of different numbers of pins, and the maximum number of pins that can be transferred can be 512 pins. However, this embodiment does not limit it. The first connector and the second connector at both ends of the cable harness under test can be connected to the universal adapter board through the universal adapter cable, and the universal adapter plate can be respectively connected to the excitation signal application circuit and the response signal detection circuit. circuit. In some examples, the excitation signal applying circuit and the response signal detecting circuit may be respectively arranged on the first universal adapter board and the second universal adapter board.

In this exemplary embodiment, through the first multiplexer of the excitation signal application circuit and the second multiplexer of the response signal detection circuit, the automatic connection of different cables can be realized, so that different cables can be connected separately. The excitation signal application circuit and the response signal detection circuit realize the fast detection of the on-off status of each cable in sequence. The application sequence and duration of the DC voltage excitation signal to each cable, as well as the detection sequence and duration of the response signal to each cable, can be completed by the detection control unit with a single-chip microcomputer as the core. The first multiplexer and the second multiplexer can be realized by using FPGA technology and controlled by a single-chip microcomputer.

As shown in FIG. 8 , the detection process of the detection device in this exemplary embodiment may include the following steps.

Step S81, perform transfer preparation operation. In this step, the first connector and the second connector (for example, plugs at both ends) at both ends of the tested cable harness can be unplugged from the original equipment circuit connection, and respectively connected to the special test cable. on the corresponding port. Through this step, the connection between the tested cable harness and the detection device can be realized.

Step S82, applying a DC excitation voltage signal to each cable. In this step, the detection control unit can input a strobe signal to the first multiplexer through the strobe signal input end of the first multiplexer, and the first multiplexer can turn on the DC voltage sequentially according to the strobe signal source and each cable, wherein the application duration of the DC voltage excitation signal on each cable may be 10 milliseconds.

Step S83, detecting the voltage value of each cable under the DC excitation voltage signal. In this step, the detection control unit can input a strobe signal to the second multiplexer through the strobe signal input end of the second multiplexer, and the second multiplexer can turn on the corresponding line according to the strobe signal. cables and test subcircuits. Generally, the first multiplexer and the second multiplexer can connect the two ends of the same cable under test sequentially (almost simultaneously). Wherein, the detection control unit can start the test after the DC voltage excitation signal of each cable is applied for 1 millisecond, and control the detection duration to be 8 milliseconds.

Step S84, the detection control unit judges whether all the cables in the cable bundle have been tested. In this step, the detection control unit can sequentially control the detection of each cable according to the cable number, and can determine whether all the cables have detected voltage values. If there are undetected cables, return to step S82 to detect undetected cables; if all cables have been detected, execute step S85.

Step S85, displaying the detection result. In this step, the detection control unit may display the serial number of the disconnected cable.

The detection device provided in this exemplary embodiment adopts a first multiplexer and a DC voltage source, and can sequentially apply a DC voltage excitation signal to one end of each cable in the cable bundle, and the other end of the cable can be Through the second multiplexer, cooperate with the test sub-circuit to detect its voltage value, and determine whether the cable is disconnected according to the magnitude of the detected voltage value.

The implementation method of this exemplary embodiment is simple and practical, can realize fast detection of the cable harness, and has high detection accuracy and good stability. Moreover, the detection device in this exemplary embodiment supports direct detection of the cable harness fixed on the electronic equipment without dismantling or damaging the cable harness, and is applicable to various scenarios.

In addition, this embodiment also provides a computer-readable storage medium storing a computer program, and when the computer program is executed, the above detection method is implemented.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

Although the embodiments disclosed in the present disclosure are as above, the content described is only the embodiments adopted to facilitate understanding of the present disclosure, and is not intended to limit the present disclosure. Anyone skilled in the art to which this disclosure belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this disclosure, but the scope of patent protection of this disclosure must still be The scope defined by the appended claims shall prevail.

Claims (9)

1. A detection method, characterized in that, it is used to detect a cable harness comprising a plurality of cables, the first end of the cable harness is connected to a first connector, and the second end of the cable harness is connected to has a second connector; The detection methods include: Applying a DC voltage excitation signal to each cable of the cable bundle sequentially through the first connector, and detecting the voltage value of the cable under the DC voltage excitation signal through the second connector ; determining the on-off status of the cable according to the voltage value of the cable under the DC voltage excitation signal; Detecting the voltage value of the cable under the DC voltage excitation signal through the second connector includes: a control response signal detection circuit detecting the voltage value of the cable under the DC voltage excitation signal through the second connector. The voltage value under; The response signal detection circuit includes: a test sub-circuit; The test sub-circuit includes: a second resistor, a third resistor and a first capacitor; The first end of the second resistance is connected to the output end of the second multiplexer, the second end of the second resistance is connected to the test output end; the first end of the third resistance is connected to the test output end The second end of the third resistor is connected to the ground; the first end of the first capacitor is connected to the test output end, and the second end of the first capacitor is grounded. 2. The detection method according to claim 1, wherein the step of applying a DC voltage excitation signal to each cable of the cable harness sequentially through the first connector comprises: The control excitation signal application circuit sequentially applies a DC voltage excitation signal to each cable of the cable bundle through the first connector. 3. The detection method according to claim 2, wherein the excitation signal applying circuit comprises: a DC voltage source, a first resistor and a first multiplexer; The first multiplexer includes: an input terminal, a plurality of strobe signal input terminals and a plurality of output terminals; The DC voltage source is respectively connected to the first end of the first resistor and the input end of the first multiplexer, the second end of the first resistor is grounded, and the first multiplexer The multiple output terminals are respectively connected to the multiple connection terminals of the first connector in a one-to-one correspondence. 4. The detection method according to claim 2, wherein the response signal detection circuit comprises: a second multiplexer; The second multiplexer includes: a plurality of input terminals, a plurality of strobe signal input terminals and an output terminal; The output terminal of the second multiplexer is connected to the test subcircuit, and the multiple input terminals of the second multiplexer are respectively connected to the multiple connection terminals of the second connector in a one-to-one correspondence. 5. The detection method according to claim 1, wherein the determining the on-off status of the cable according to the voltage value of the cable under the DC voltage excitation signal comprises: When the voltage value of the cable under the DC voltage excitation signal is greater than a threshold, it is determined that the cable is not disconnected; When the voltage value of the cable under the DC voltage excitation signal is less than or equal to the threshold, it is determined that the cable is disconnected. 6. A detection device, characterized in that it is used to detect a cable harness comprising a plurality of cables, the first end of the cable harness is connected to a first connector, and the second end of the cable harness is connected to has a second connector; The detection device includes: an excitation signal application circuit, a response signal detection circuit and a detection control unit; The excitation signal applying circuit is configured to sequentially apply a DC voltage excitation signal to each cable of the cable bundle through the first connector under the control of the detection control unit; The response signal detection circuit is configured to detect the voltage value of the cable under the DC voltage excitation signal through the second connector under the control of the detection control unit; The detection control unit is configured to determine whether the cable is on or off according to the voltage value of the cable under the DC voltage excitation signal; The response signal detection circuit includes: a test sub-circuit; The test sub-circuit includes: a second resistor, a third resistor and a first capacitor; The first end of the second resistance is connected to the output end of the second multiplexer, the second end of the second resistance is connected to the test output end; the first end of the third resistance is connected to the test output end The second end of the third resistor is connected to the ground; the first end of the first capacitor is connected to the test output end, and the second end of the first capacitor is grounded. 7. The detection device according to claim 6, wherein the excitation signal applying circuit comprises: a DC voltage source, a first resistor, and a first multiplexer; The first multiplexer includes: an input terminal, a plurality of strobe signal input terminals and a plurality of output terminals; The DC voltage source is respectively connected to the first end of the first resistor and the input end of the first multiplexer, the second end of the first resistor is grounded, and the first multiplexer A plurality of output ends are respectively connected to the plurality of connection ends of the first connector in one-to-one correspondence; a plurality of strobe signal input ends of the first multiplexer are connected to the detection control unit. 8. The detection device according to claim 6, wherein the response signal detection circuit comprises: a second multiplexer; The second multiplexer includes: a plurality of input terminals, a plurality of strobe signal input terminals and an output terminal; The output terminal of the second multiplexer is connected to the test subcircuit, and the multiple input terminals of the second multiplexer are respectively connected to the multiple connection terminals of the second connector in one-to-one correspondence, Multiple strobe signal input terminals of the second multiplexer are connected to the detection control unit. 9. The detection device according to claim 6, further comprising: a first switching unit and a second switching unit; The first conversion unit is used to connect the first connector and the excitation signal application circuit; The second switching unit is used for connecting the second connector and the response signal detection circuit.

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