CN111693819B - Detection method and device - Google Patents

Detection method and device Download PDF

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Publication number
CN111693819B
CN111693819B CN202010448810.9A CN202010448810A CN111693819B CN 111693819 B CN111693819 B CN 111693819B CN 202010448810 A CN202010448810 A CN 202010448810A CN 111693819 B CN111693819 B CN 111693819B
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cable
connector
multiplexer
resistor
excitation signal
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CN111693819A (en
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陈圣俭
宋钱骞
沈峰
陈超
段靖辉
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Beijing Watertek Information Technology Co Ltd
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Beijing Watertek Information Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors
    • G01R31/60—Identification of wires in a multicore cable

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

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
The present disclosure relates to, but not limited to, the field of automatic testing technologies, and more particularly, to a method and apparatus for testing.
Background
Currently, cable harnesses can be widely used in many types of electronic equipment, and can be used in many scenarios. However, in battlefields or training grounds, in the field, away from the work site for technical support, etc., the cable harness is susceptible to gnawing by rats or accidental external injuries. The method has the advantages that the broken wire of the cable bundle is rapidly determined and repaired, and the method has important significance for restoring the function of electronic equipment (or equipment).
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The disclosure provides a detection method and a detection device.
In one aspect, the present disclosure provides a method for detecting a cable bundle including a plurality of cables, a first connector connected to a first end of the cable bundle, and a second connector connected to a second end of the cable bundle. The detection method comprises the following steps: sequentially applying a direct-current voltage excitation signal to each cable of the cable bundle through the first connector, and detecting the 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.
In another aspect, the present disclosure provides a detection device for detecting a cable bundle comprising a plurality of cables, a first end of the cable bundle being connected to a first connector, and a second end of the cable bundle being connected to a second connector. The detection device includes: an excitation signal applying circuit, a response signal detecting circuit, and a detection control unit; the excitation signal applying circuit is used for sequentially applying a direct-current 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 used for detecting the voltage value of the cable under the direct current excitation signal through the second connector under the control of the detection control unit; and the detection control unit is used for determining the on-off condition of the cable according to the voltage value of the cable under the direct current excitation signal.
The detection method and the detection device provided by the disclosure can be used for detecting whether a single cable is broken or not for a cable bundle formed by bundling a plurality of cables, and the detection speed is high.
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 the practice of the disclosure. Other advantages of the disclosure may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a schematic view of a cable bundle of at least one embodiment of the present disclosure;
fig. 2 includes fig. 2 (a) through 2 (c), which are exemplary illustrations of a first connector and a second connector, respectively, of at least one embodiment of the present disclosure;
FIG. 3 is a flow chart of a detection method according to at least one embodiment of the present disclosure;
FIG. 4 is a schematic view of a detection device according to at least one embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a four-way selector;
FIG. 6 is an exemplary diagram of a stimulus signal application circuit of at least one embodiment of the present disclosure;
fig. 7 is an exemplary diagram of a response signal detection circuit in accordance with at least one embodiment of the present disclosure;
fig. 8 is a schematic view of a detection flow of a detection apparatus according to at least one embodiment of the disclosure.
Detailed Description
The present disclosure describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described in the present disclosure. Although many possible combinations of features are shown in the drawings and discussed in the embodiments, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present disclosure includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements of the present disclosure that have been disclosed may also be combined with any conventional features or elements to form unique aspects as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other aspects to form yet another unique aspect as defined by the claims. Thus, it should be understood that any of the features shown or discussed in this disclosure may be implemented individually or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, one or more modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented a method or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present disclosure.
In the drawings, the size of the constituent elements, the thickness of layers, or regions may be exaggerated for clarity. Therefore, one mode of the present disclosure is not necessarily limited to the dimensions, and the shape and size of each component in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.
Unless defined otherwise, technical or 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 use of "first," "second," and the like in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. In the present disclosure, "a plurality" may mean two or more numbers. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
At least one embodiment of the present disclosure provides a detection method and apparatus, which can implement quick detection on whether a single cable is broken in a cable bundle formed by bundling a plurality of cables.
Fig. 1 is a schematic view of a cable harness according to at least one embodiment of the present disclosure. As shown in fig. 1, the cable bundle 10 may include a plurality of cables 100. A plurality of cables 100 may be bundled to form a cable bundle 10. The cable bundle 10 may have a first end 101 and a second end 102. A first end 101 of the cable bundle 10 may be connected to a first connector and a second end 102 of the cable bundle 10 may be connected to a second connector.
In some examples, both 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 may be fixed to an electronic equipment (or device), and the first connector and the second connector may be removable from the electronic equipment (or device), for example, may be provided on the electronic equipment (or device) in a pluggable manner.
Fig. 2 includes fig. 2 (a) to 2 (c), which are exemplary views of a first connector and a second connector, respectively, of at least one embodiment of the present disclosure. Only one cable 100 of the cable bundle 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 ends of the first connector or the second connector. For example, the number of connection ends of the first connector 11 and the second connector 12 shown in fig. 2 may be 40 each, and the cable bundle connected between the first connector 11 and the second connector 12 may include less than or equal to 40 cables.
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 aerial socket, and the second connector 12 may be an aerial socket. When the connector is an aviation plug, the connecting end of the connector can be a contact pin; when the connector is an aircraft receptacle, the connecting end of the connector may be a jack. The present embodiment is not limited to the type of the first connector and the second connector.
Fig. 3 is a flowchart of a detection method according to at least one embodiment of the disclosure. The detection method provided by the present exemplary embodiment can be used to detect a cable bundle including a plurality of cables, and 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.
As shown in fig. 3, the detection method of the present exemplary embodiment may include:
step S1, sequentially applying a direct-current voltage excitation signal to each cable of a cable bundle through a first connector, and detecting a voltage value of each cable under the direct-current voltage excitation signal through a second connector;
and S2, determining the on-off condition of the cable according to the voltage value of the cable under the direct-current voltage excitation signal.
The detection method provided by the present exemplary embodiment can be used to detect a cable bundle bundled by a large number of cables (for example, several tens to several hundreds of cables) as shown in fig. 1. According to the detection method provided by the exemplary embodiment, the cable bundle does not need to be unbundled, the outer skin of the cable does not need to be punctured to contact with the inner metal for detection, and the on-off condition of each cable in the cable bundle can be rapidly detected only through the first connector and the second connector at the two ends of the cable bundle.
In some exemplary embodiments, step S1 may include: the control excitation signal applying circuit sequentially applies a direct-current voltage excitation signal to each cable of the cable bundle through the first connector, and the control response signal detecting circuit detects the voltage value of the cable under the direct-current voltage excitation signal through the second connector.
In some exemplary embodiments, the stimulus signal applying circuit may include: direct current voltage source, first resistance and first multiplexer. The first multiplexer may include: an input terminal, a plurality of strobe signal input terminals, and a plurality of output terminals. The direct-current voltage source can be respectively connected with 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 output ends of the first multiplexer can be respectively connected with the connecting ends of the first connector in a one-to-one correspondence mode. In some examples, the first multiplexer may be implemented by an FPGA (Field Programmable Gate Array). The first multiplexer can provide the direct-current voltage excitation signal for each cable in the cable bundle in sequence, and the cable bundle detection device is simple and practical and supports rapid detection of the cable bundle.
In some exemplary embodiments, the response signal detection circuit may include: a second multiplexer and a test sub-circuit. The second multiplexer may include: a plurality of input terminals, a plurality of strobe signal input terminals, and an output terminal. The output end of the second multiplexer can be connected with the test sub-circuit, and a plurality of input ends of the second multiplexer can be respectively connected with a plurality of connecting ends of the second connector in a one-to-one correspondence mode. In some examples, the second multiplexer may be implemented by an FPGA. In the embodiment of the present invention, the voltage value of each cable in the cable bundle can be sequentially detected by the second multiplexer, and the detection accuracy is high.
In some exemplary embodiments, the test sub-circuit may include: the second resistor, the third resistor and the first capacitor. A first terminal of the second resistor may be connected to an output terminal of the second multiplexer, and a second terminal of the second resistor may be connected to a test output terminal. The first terminal of the third resistor may be connected to the test output terminal, and the second terminal of the third resistor may be grounded. The first terminal of the first capacitor may be connected to the test output terminal, and the second terminal of the first capacitor may be grounded. The present exemplary embodiment can improve the detection accuracy and the detection stability by employing the test sub-circuit.
In some exemplary embodiments, step S2 may include: when the voltage value of the cable under the direct-current voltage excitation signal is larger than a threshold value, determining that the cable is not disconnected; and when the voltage value of the cable under the direct-current voltage excitation signal is smaller than or equal to the threshold value, determining that the cable is disconnected. In some examples, taking the dc voltage excitation signal as +5V voltage 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; and when the voltage value of the cable under the direct-current voltage excitation signal is larger than 4V, the cable is confirmed not to be disconnected. In the exemplary embodiment, the detection result of the voltage value of each cable is combined, so that the disconnection condition of the cable bundle as a whole can be obtained, for example, whether the cable bundle is disconnected and which cables are disconnected can be determined.
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 apparatus provided by the present exemplary embodiment may be used to detect a cable bundle 10 including a plurality of cables, a first end of the cable bundle 10 may be connected to a first connector 11, and a second end of the cable bundle 10 may be connected to a 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, the present embodiment is not limited to the types of the first connector 11 and the second connector 12.
As shown in fig. 4, the detection apparatus of the present exemplary embodiment may include: a detection control unit 20, an excitation signal application circuit 21, and a response signal detection circuit 22. The excitation signal applying circuit 21 may be configured to sequentially apply a dc voltage excitation signal to each cable of the cable bundle 10 through the first connector 11 under the control of the detection control unit 20. The response signal detection circuit 22 may be used for sequentially detecting 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 may be configured to determine the on-off condition of the cable according to a voltage value of the cable under the dc voltage excitation signal. In some examples, the excitation signal applying circuit and the response signal detecting circuit may be implemented by an FPGA, and the detection control unit may be implemented by a single chip microcomputer. However, this embodiment is not limited to this.
In some exemplary embodiments, the stimulus signal applying circuit 21 may include: the circuit comprises a direct current 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 direct-current voltage source can be respectively connected with 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 a plurality of output ends of the first multiplexer can be respectively connected with a plurality of connecting ends of the first connector in a one-to-one correspondence manner; the plurality of gate signal input terminals of the first multiplexer may be connected to the detection control unit.
In some exemplary embodiments, the response signal detection circuit 22 may include: a second multiplexer and a test sub-circuit. The second multiplexer may include: a plurality of input terminals, a plurality of strobe signal input terminals, and an output terminal. The output end of the second multiplexer may be connected to the test sub-circuit, a plurality of input ends of the second multiplexer may be respectively connected to a plurality of connection ends of the second connector in a one-to-one correspondence, and a plurality of gating signal input ends of the second multiplexer may be connected to the detection control unit.
In some exemplary embodiments, the test sub-circuit may include: the second resistor, the third resistor and the first capacitor. A first end of the second resistor can be connected with the output end of the second multiplexer, and a second end of the second resistor can be connected with the test output end; the first end of the third resistor can be connected with the test output end, and the second end of the third resistor can be grounded; the first terminal of the first capacitor may be connected to the test output terminal, and the second terminal of the first capacitor may be grounded.
Fig. 5 is a schematic diagram of a four-way selector. As shown in FIG. 5, D 0 、D 1 、D 2 、D 3 May be four outputs, Y may be an input, a 0 、A 1 May be a strobe signal input. By means of a strobe signal input A 0 And A 1 Inputting a strobe signal, from D 0 、D 1 、D 2 、D 3 Any one of the four output ends is selected, and the data of the input end Y is output to the selected output end, so that the multi-path time-sharing transmission of the data can be realized. The principle of the single-input multi-output and multi-input single-output multiplexers is similar, and therefore, the description thereof is omitted.
Fig. 6 is an exemplary diagram of an excitation signal applying circuit according to at least one embodiment of the disclosure. As shown in fig. 6, the excitation signal applying circuit of the present exemplary embodiment may include: DC voltage source, first resistor R 1 And a first multiplexer 210. The first multiplexer 210 may include: one input terminal Y, moreA strobe signal input terminal (e.g., A) 0 To A m M may be an integer greater than 1) and a plurality of outputs (e.g., IN) 1 To IN n And n may be an integer greater than 1). The DC voltage source can be connected to the first resistor R 1 Is connected to the input terminal Y of the first multiplexer 210, a first resistor R 1 May be grounded. The plurality of output terminals of the first multiplexer 210 may be connected to the plurality of connection terminals of the first connector in a one-to-one correspondence, respectively. The plurality of outputs of the first multiplexer 210 may be connected to the cable bundle 10 through a first connector. The plurality of strobe signal inputs of the first multiplexer 210 may be connected to the detection control unit for receiving the strobe signals therefrom.
In some examples, the first multiplexer 210 may be implemented using an FPGA. However, this embodiment is not limited to this.
In the present exemplary embodiment, the dc voltage source may be a +5 volt dc voltage source. A first resistor R 1 May be 10 kilo ohms. The detection control unit may control the first multiplexer 210 by connecting the gating signal input terminal, so that the dc voltage excitation signal generated by the dc voltage source may respectively switch on the first terminal 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 may sequentially receive the dc voltage excitation signals in a certain order, and the duration of the dc voltage excitation signal applied to each cable may be 10 milliseconds until all the cables are traversed.
Fig. 7 is an exemplary diagram of a response signal detection circuit according to at least one embodiment of the disclosure. As shown in fig. 7, the response signal detection circuit of the present exemplary embodiment may include: a second multiplexer 220 and a test sub-circuit 221. The second multiplexer 220 may include: multiple inputs (e.g. IN) 1 To IN n N may be an integer greater than 1), a plurality of strobe signal inputs (e.g., a) 0 To A m M may be an integer greater than 1) and an output terminal Y. The output Y of the second multiplexer 220 may be connected to a test sub-circuit 221And (6) connecting. A plurality of input terminals of the second multiplexer 220 may be respectively connected to a plurality of connection terminals of the second connector in a one-to-one correspondence. The inputs of the second multiplexer 220 may be connected to the cable bundle 10 via second connectors. The plurality of gate signal inputs of the second multiplexer 220 may be connected to the detection control unit. The test subcircuit 221 may include: a second resistor R 2 A third resistor R 3 And a first capacitor C 1 . A second resistor R 2 May be connected to the output terminal Y of the second multiplexer 220, a second resistor R 2 May be connected to the test output S. Third resistor R 3 Can be connected to the test output S, a third resistor R 3 May be grounded. A first capacitor C 1 Can be connected to the test output S, a first capacitor C 1 May be grounded.
In some examples, the second multiplexer 220 may be implemented using an FPGA. However, the present embodiment is not limited to this.
In the exemplary embodiment, the voltage value of the cable under the DC voltage excitation signal can be obtained from the second resistor R 2 And a third resistor R 3 The connection point between them, i.e. the test output S. In the response signal detection circuit, a second resistor R 2 May be 1 kiloohm, and a third resistor R 3 May be 10 kilo-ohms, and a first capacitor C 1 The capacitance value of (a) may be 10 nanofarads (nf). Third resistor R 3 And a first capacitor C 1 The first order dynamic circuit is formed with a charge time constant of about 10 microseconds and a discharge time constant of 100 microseconds (i.e., 0.1 milliseconds). The test sub-circuit provided by the exemplary embodiment can ensure that the voltage value detected from the test output terminal is not affected by the high frequency interference signal. Moreover, the duration of the application of the dc voltage excitation signal on each cable may be 10 ms, and accordingly, the duration of the acquisition at the test output may be 8 ms, so that the stability and accuracy of the voltage value detection can be ensured.
The first cable in the cable bundle 10 is detected as an example. In the present example of the above-described embodiment,when the first cable of the cable bundle 10 is detected, the first multiplexer 210 shown in fig. 6 switches on the dc voltage source and the first end of the first cable under the control of the detection control unit, and the second multiplexer 220 shown in fig. 7 switches on the second end of the first cable and the test sub-circuit 221 under the control of the detection control unit. The detection control unit may provide the gating signals to the gating signal input terminals of the first multiplexer 210 and the second multiplexer 220, respectively, so as to apply a dc voltage of 5V to the first end of the first cable, and start the automatic detection at the second end of the first cable. The duration of the direct current voltage excitation signal can be 10 milliseconds, and the automatic test of the response signal at the second end of the first cable can be started after the direct current voltage excitation signal is applied and delayed for 1 millisecond to ensure that the detected voltage value is stable and reliable, and then can be ended after the second end of the first cable continuously acquires for 8 milliseconds. In some examples, when the voltage value detected at the second end of the first cable is 4.55 volts, it indicates that the first cable is not disconnected. If there is a wire break in the first cable, the second end of the first cable must not receive the excitation voltage, and the detected voltage value may be 0 v. In the case of a broken wire of the first cable, even if an interference signal enters the test sub-circuit, the detected voltage value can be ensured to be still 0 volt because the capacitance energy can not be suddenly changed. And even if the test sub-circuit induces the interference voltage signal, the third resistor R will be used 3 And a first capacitor C 1 The formed discharge loop is automatically released at any time, so that the detected voltage value is still 0V. The exemplary embodiment can improve the accuracy and stability of the detection result by providing the test sub-circuit.
In the present exemplary embodiment, the detection time period of the entire cable harness may be determined by the application duration time period of the direct-current voltage excitation signal. Taking a cable bundle comprising 512 cables as an example, the time for completing the detection of all cables is only about 6 seconds, and the quick detection can be realized.
In some exemplary embodiments, the detection apparatus of the present embodiment may further include: the first switching unit and the second switching unit. The first switching unit may be for connecting the first connector and the excitation signal applying circuit. The second switching unit may be for connecting the second connector and the response signal detection circuit. The number of the switching ends of the first switching unit and the second switching unit can be larger than or equal to the number of the cables of the cable bundle. However, this embodiment is not limited to this. In the exemplary embodiment, the switching unit is arranged to connect the first connector and the second connector for detection, so that the method and the device can be applied to a detection scene in which the extraction length of the first connector and the second connector is limited due to the fact that the cable bundle is fixed on the electronic equipment.
Fig. 8 is a schematic view of a detection flow of a detection apparatus according to at least one embodiment of the disclosure. In the present exemplary embodiment, the detection means may include: the device comprises a first switching unit, a second switching unit, an excitation signal applying circuit, a detection control unit and a response signal detection circuit. The first adapter unit can comprise a first universal adapter plate and a first adapter cable; the second adapter unit may include a second universal adapter plate and a second adapter cable. The stimulus signal application circuit may be as shown in fig. 6. The response signal detection circuit may be as shown in fig. 7. The core function of the first universal adapter plate and the second universal adapter plate is to realize the uniform adapter processing of different numbers of contact pins, and the maximum number of the adapter contact pins can be 512 pins. However, the present embodiment is not limited to this. The first connector and the second connector at two ends of the tested cable bundle can be respectively connected to the universal adapter plate through universal adapter cables, and the universal adapter plate can be respectively connected to the excitation signal applying circuit and the response signal detecting circuit. In some examples, the excitation signal application circuit and the response signal detection circuit may be disposed on the first universal adapter plate and the second universal adapter plate, respectively.
In the exemplary embodiment, the first multiplexer of the excitation signal applying circuit and the second multiplexer of the response signal detecting circuit can automatically connect different cables, so that the different cables are respectively connected with the excitation signal applying circuit and the response signal detecting circuit, and the on-off condition of each cable is rapidly detected in sequence. The application sequence and duration of the direct-current voltage excitation signal to each cable and the detection sequence and duration of the response signal of each cable can be completed by a detection control unit taking a single chip microcomputer as a core. The first multiplexer and the second multiplexer can be realized by adopting an FPGA technology and are controlled by a single chip microcomputer.
As shown in fig. 8, the detection flow of the detection apparatus of the present exemplary embodiment may include the following steps.
And step S81, carrying out switching preparation operation. In this step, the first connector and the second connector (for example, plugs at two ends) at two ends of the cable bundle under test may be first unplugged from the original equipment circuit connection, and connected to the corresponding ports of the dedicated test cable, respectively. The connection between the cable bundle to be detected and the detection device can be realized through the step.
Step S82, a dc excitation voltage signal is applied to each cable. In this step, the detection control unit may input the gating signal to the first multiplexer through a gating signal input end of the first multiplexer, and the first multiplexer may sequentially turn on the dc voltage source and each cable according to the gating signal, where an application duration of the dc voltage excitation signal on each cable may be 10 milliseconds.
And S83, detecting the voltage value of each cable under the direct-current excitation voltage signal. In this step, the detection control unit may input the gate signal to the second multiplexer through a gate signal input terminal of the second multiplexer, and the second multiplexer may turn on the corresponding cable and the test sub-circuit according to the gate signal. In general, the first multiplexer and the second multiplexer can sequentially (almost simultaneously) connect both ends of the same cable under test. The detection control unit can start the test after the direct current voltage excitation signal of each cable is applied for 1 millisecond, and control the detection time to be 8 milliseconds.
Step S84, the detection control unit determines whether the testing of all the cables in the cable bundle is completed. In this step, the detection control unit can sequentially control each cable to be detected according to the cable number, and can judge whether all the cables are detected to obtain a voltage value. If there is a cable that is not detected, the process returns to step S82 to detect the undetected cable; if the detection of all the cables is completed, step S85 is executed.
And step S85, displaying the detection result. In this step, the detection control unit may display the number of the cable in which the disconnection exists.
The detection device provided by the exemplary embodiment uses the first multiplexer in cooperation with the dc voltage source, and may sequentially apply a dc voltage excitation signal to one end of each cable in the cable bundle, and may detect a voltage value of the cable at the other end of the cable through the second multiplexer in cooperation with the test sub-circuit, and determine whether the cable is disconnected according to the detected voltage value.
The implementation mode of the exemplary embodiment is simple and practical, can realize the rapid detection of the cable bundle, and has high detection accuracy and good stability. Moreover, the detection device of the present exemplary embodiment supports direct detection of a cable harness fixed to an electronic equipment, does not require disassembly or breakage of the cable harness, and is applicable to various scenarios.
Furthermore, the present embodiment also provides a computer-readable storage medium storing a computer program which, when executed, implements the detection method as described above.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations 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 performed by several physical components in cooperation. 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). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, 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 includes any information delivery media as known to those skilled in the art.
Although the embodiments disclosed in the present disclosure are described above, the descriptions are only for the convenience of understanding the present disclosure, and are not intended to limit the present disclosure. It will be understood by those skilled in the art of the present disclosure that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the disclosure is to be limited only by the terms of the appended claims.

Claims (9)

1. A detection method is characterized by being 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;
determining the on-off condition of the cable according to the voltage value of the cable under the direct-current voltage excitation signal;
detecting, by the second connector, a voltage value of the cable under the dc voltage excitation signal, including: the control response signal detection circuit detects the voltage value of the cable under the direct-current voltage excitation signal through the second connector;
the response signal detection circuit includes: a test sub-circuit;
the test sub-circuit comprising: a second resistor, a third resistor and a first capacitor;
the first end of the second resistor is connected with the output end of the second multiplexer, and the second end of the second resistor is connected with the test output end; the first end of the third resistor is connected with the test output end, and the second end of the third resistor is grounded; the first end of the first capacitor is connected with the test output end, and the second end of the first capacitor is grounded.
2. The method for detecting according to claim 1, wherein said applying a dc voltage excitation signal to each cable of said cable bundle in sequence through said first connector comprises:
and the control excitation signal applying circuit sequentially applies a direct-current 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 application circuit includes: the circuit comprises a direct-current 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 direct-current voltage source is respectively connected with 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 output ends of the first multiplexer are respectively connected with the connecting ends of the first connector in a one-to-one correspondence mode.
4. The detection method according to claim 2, wherein the response signal detection circuit includes: 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 end of the second multiplexer is connected with the test sub-circuit, and a plurality of input ends of the second multiplexer are respectively connected with a plurality of connecting ends of the second connector in a one-to-one correspondence mode.
5. The detection method according to claim 1, wherein the determining of the on-off state of the cable according to the voltage value of the cable under the direct-current voltage excitation signal comprises:
when the voltage value of the cable under the direct-current voltage excitation signal is larger than a threshold value, determining that the cable is not disconnected;
and when the voltage value of the cable under the direct-current voltage excitation signal is smaller than or equal to the threshold value, determining that the cable is disconnected.
6. A detection device is characterized by being 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 device includes: an excitation signal applying circuit, a response signal detecting circuit, and a detection control unit;
the excitation signal applying circuit is used for sequentially applying a direct-current 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 used for detecting the voltage value of the cable under the direct-current voltage excitation signal through the second connector under the control of the detection control unit;
the detection control unit is used for determining the on-off condition of the cable according to the voltage value of the cable under the direct-current voltage excitation signal;
the response signal detection circuit includes: a test sub-circuit;
the test sub-circuit comprising: a second resistor, a third resistor and a first capacitor;
the first end of the second resistor is connected with the output end of the second multiplexer, and the second end of the second resistor is connected with the test output end; the first end of the third resistor is connected with the test output end, and the second end of the third resistor is grounded; the first end of the first capacitor is connected with 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 includes: the circuit comprises a direct current 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 direct-current voltage source is respectively connected with a first end of the first resistor and an input end of the first multiplexer, a second end of the first resistor is grounded, and a plurality of output ends of the first multiplexer are respectively connected with a plurality of connecting ends of the first connector in a one-to-one correspondence manner; and a plurality of gating signal input ends of the first multiplexer are connected with the detection control unit.
8. The detection device of 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 end of the second multiplexer is connected with the test sub-circuit, a plurality of input ends of the second multiplexer are respectively connected with a plurality of connecting ends of the second connector in a one-to-one correspondence mode, and a plurality of gating signal input ends of the second multiplexer are connected with the detection control unit.
9. The detection device of claim 6, further comprising: the first switching unit and the second switching unit;
the first switching unit is used for connecting the first connector and an excitation signal applying circuit;
the second switching unit is used for connecting the second connector and the response signal detection circuit.
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