CN217585852U

CN217585852U - Sensor testing device

Info

Publication number: CN217585852U
Application number: CN202220786389.7U
Authority: CN
Inventors: 郭红; 李海林; 周录尧; 崔玉喜; 康卫中
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-10-14
Anticipated expiration: 2032-04-06

Abstract

The application relates to a sensor testing device for testing a sensor, the sensor testing device comprises a plurality of testing circuits and a testing meter, each testing circuit is provided with a first end, a second end and a testing end which are mutually communicated, the first end is used for being electrically connected with the sensor, the second end is used for being electrically connected with a working circuit, and the testing end is electrically connected with the testing meter. The sensor testing device is provided with a plurality of testing lines, so that the output signal value of the sensor under the condition that any one of the testing lines is open-circuited is obtained, thereby respectively simulating multiple sensor failure modes and recording the output signal value of the sensor under each failure mode. When the sensor breaks down, the output signal value of the sensor during the fault is compared with the output signal value recorded during the test, so that the fault of the sensor is determined to be in accordance with which failure mode, the fault of the sensor is determined, and the wiring harness of the working circuit for connecting the sensor is not required to be damaged.

Description

Sensor testing device

Technical Field

The application relates to the technical field of sensor fault detection, in particular to a sensor testing device.

Background

At present, a sensor is widely used in various fields as a detection device. The sensor is used for acquiring required measured information and converting the information into an electric signal or other required forms to be output according to a certain rule. In the using process, the sensor needs to be connected with the working circuit, so that the controller arranged on the working circuit can acquire the information acquired by the sensor.

In order to connect the sensor to the operating circuit, the terminals of the sensor need to be connected to a wiring harness. Generally, when a sensor malfunctions, the sensor is detected and a region where the malfunction thereof occurs is diagnosed. For this reason, a wire-breaking detection method is generally used in the related art, which punctures an insulating material on the periphery of a wire harness connected to a sensor, reads a signal value output by the sensor, and then determines a failure cause of the sensor.

However, the sensor failure detection method in the related art has a problem that the wiring harness needs to be broken.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a sensor testing device that does not damage a wire harness in order to solve the problem in the related art that the wire harness needs to be broken when performing fault detection on a sensor.

According to one aspect of the present application, there is provided a sensor testing device for testing a sensor, the sensor testing device comprising:

a plurality of test lines, each of the test lines having a first end, a second end and a test end in communication with each other, the first end for electrical connection with the sensor and the second end for electrical connection with a working circuit; and

and the test meter is electrically connected with the test end.

The sensor testing device is provided with a testing circuit which is provided with a first end and a second end which are communicated with each other, wherein the first end is used for being electrically connected with the sensor, and the second end is used for being electrically connected with the working circuit, so that the sensor is communicated with the working circuit through the testing circuit. The testing harness is provided with a testing end, and the sensor testing device further comprises a testing meter, so that the testing meter is electrically connected with the testing end to measure the output signal value of the sensor. In the actual test process, one of the test lines can be selected as an open circuit, and the other test lines are connected with the sensor and the working line, the first end of the selected circuit is disconnected with the sensor, or the second end of the selected circuit is disconnected with the working circuit, so that the line corresponding to the selected test line is opened, and the output signal value of the sensor at the moment is measured through the test meter. Therefore, different sensor fault conditions can be simulated by opening different test lines, and the output signal value of the sensor under each fault condition can be recorded. After the test is finished, the connection between the sensor testing device and the sensor and the working circuit is disconnected, so that the sensor and the working circuit are connected to start working. When the sensor fails in operation, the output signal value of the sensor in the failure is compared with the signal values recorded in the prior art under different failure conditions, and the failure reason of the sensor can be determined. The sensor testing device can realize fault detection on the sensor without damaging the wiring harness, thereby avoiding the influence on the performance of the wiring harness.

In one embodiment, the test lines include power lines and signal lines.

In one embodiment, the test circuit further includes a ground circuit.

In one embodiment, the first end is provided with two elastic parts which are arranged opposite to each other, and the elastic parts are configured to provide elastic force which enables the elastic parts to have the tendency of moving towards the direction of approaching each other.

In one embodiment, the distance between the two elastic parts gradually decreases and then gradually increases from the end connected with the first end to the other end.

In one embodiment, the first end, the second end and the testing end are respectively provided with an insulating member on the periphery.

In one embodiment, the insulator comprises a heat shrink tube.

In one embodiment, the sensor testing device further comprises a connector;

the connecting piece is provided with a wiring channel for the test line to pass through and three wire outlets respectively communicated with the wiring channel, and the first end, the second end and the test end respectively pass through one wire outlet.

In one embodiment, the connector comprises a first tube and a second tube;

the first routing channel is arranged in the first pipe body, and the two ends of the first pipe body in the axial direction are provided with the wire outlets;

one end of the second pipe body is connected with the circumferential outer wall of the first pipe body, the second wiring channel is arranged in the second pipe body, and the wire outlet is formed in the end, far away from the first pipe body, of the second pipe body.

In one embodiment, the longitudinal extension direction of the second tube is perpendicular to the longitudinal extension direction of the first tube.

Drawings

FIG. 1 is a schematic diagram of a test circuit according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the sensor testing device in the embodiment of FIG. 1;

fig. 3 is a schematic structural diagram of a first end in an embodiment of the present application.

Description of reference numerals:

100. a sensor; 200. a working circuit; 10. testing the circuit; 12. a power supply line; 14. a signal line; 16. a ground line; 20. a first end; 22. an elastic portion; 30. a second end; 40. a test end; 50. an insulating member; 60. a connecting member; 62. a first pipe body; 64. a second tube.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

FIG. 1 is a schematic diagram of a test circuit according to an embodiment of the present application; fig. 2 is a schematic structural diagram of the sensor testing device in the embodiment shown in fig. 1.

Referring to fig. 1-2, a sensor testing device according to an embodiment of the present application is provided for testing a sensor 100, the sensor testing device includes a plurality of test lines 10 and a test meter, each test line 10 has a first end 20, a second end 30 and a test end 40, which are communicated with each other, the first end 20 is electrically connected to the sensor 100, the second end 30 is electrically connected to an operating circuit 200, and the test end 40 is electrically connected to the test meter.

The sensor testing device enables the sensor 100 and the operating circuit 200 to communicate with each other by connecting with the first end 20 and the second end 30, respectively, by providing the test line 10, and the test line 10 has the first end 20 and the second end 30 communicating with each other. By providing a test meter and having a test terminal 40 on the test line 10, the test meter can be electrically connected to the test terminal 40 to test the output signal value of the sensor 100. It is understood that, in order to enable the sensor 100 to operate normally, a plurality of terminals for communicating with the operating circuit 200 are provided on the sensor 100, and therefore, by providing a plurality of test lines 10 to be connected to the plurality of terminals on the sensor 100, respectively, and enabling any one of the test lines 10 to be opened, an output signal value of the sensor 100 in the case where the test line 10 is opened can be obtained. In this way, in the actual test process, it is possible to simulate various failure modes of the sensor 100 by opening any one test line 10 of the plurality of test lines 10, respectively, and record the output signal value of the sensor 100 in each failure mode. After the test is finished, all the test wiring harnesses are disconnected from the sensor 100 and the working circuit 200, so that the sensor 100 is directly connected with the working circuit 200 to start working, and when the sensor 100 fails, the output signal value of the sensor 100 in the failure process is compared with the output signal value recorded in the test process, so that the failure of the sensor 100 is determined to be in accordance with which failure mode, and the failure determination of the sensor 100 is realized. In the process, the wiring harness used for connecting the sensor 100 with the working circuit 200 is not required to be damaged, so that the service life of the wiring harness is prolonged, the wiring harness has good sealing performance on the wires in the wiring harness, and the influence of corrosion or breakage of the wires in the wiring harness on the performance of the working circuit 200 is prevented.

It should be noted that the working circuit 200 is a circuit to which the sensor 100 is connected during operation, and a controller is provided in the working circuit 200 and is configured to obtain an output signal value of the sensor 100.

Alternatively, the test meter may employ a testing tool such as a multimeter to obtain the output signal values of the sensor 100. For example, when the output signal of the sensor 100 is a voltage, a voltage level of the multimeter can be used for measurement.

In some embodiments, as shown in FIGS. 1-2, the test lines 10 include power lines 12 and signal lines 14. It should be noted that the sensor 100 has a power supply terminal and a signal terminal, wherein the power supply terminal is used for being connected with the positive pole of the power supply in the operating circuit 200 during the operation of the sensor 100, and the signal terminal is used for outputting the output signal of the sensor 100. Therefore, by arranging the power line 12 and the signal line 14 to communicate the first end 20 of the power line 12 with the power terminal of the sensor 100, communicate the second end 30 of the power line 12 with the power anode in the operating circuit 200, communicate the first end 20 of the signal line 14 with the signal terminal of the sensor 100, and connect the second end 30 of the signal line 14 into the operating circuit 200 for communicating with the signal terminal of the sensor 100, the output signal value of the sensor 100 is recorded when the power line 12 is open or the signal line 14 is open, respectively, so as to simulate two failure situations. Specifically, when the analog power line 12 is opened, the first end 20 of the power line 12 is disconnected from the sensor 100, or the second end 30 of the power line 12 is disconnected from the operating circuit 200, so as to open the power line 12, and at this time, the test meter is electrically connected to the test end 40 of the power line 12 and the test end 40 of the signal line 14, respectively, so as to measure and record the output signal value of the sensor 100. When the analog signal line 14 is opened, the power supply line 12 is connected between the power supply terminal and the operating line, the first end 20 of the signal line 14 is disconnected from the signal terminal of the sensor 100 or the second end 30 is disconnected from the operating circuit 200, and the output signal value of the sensor 100 is recorded by the test meter.

In some embodiments, as shown in FIGS. 1-2, the test line 10 further includes a ground line 16. The sensor 100 further has a ground terminal for communicating with the negative electrode of the power supply in the operating circuit 200. In this manner, by providing the ground line 16 such that the first end 20 of the ground line 16 is electrically connected to the ground terminal of the sensor 100 during testing, and the second end 30 of the ground line 16 is connected to the negative power supply terminal of the working line, the connection or disconnection of the ground line 16 can be made as needed during testing. For example, when it is required to simulate the open circuit of the grounding line 16, the first end 20 of the grounding line 16 is disconnected from the grounding terminal of the sensor 100, or the second end 30 of the grounding line 16 is disconnected from the operating circuit 200, so as to record the output voltage value of the sensor 100 in such a failure mode through the test table.

It will be appreciated that, because the sensors 100 have different configurations and multiple modes of operation and output signals, the number of terminals used to connect to the operating circuit 200 on different sensors 100 will vary, as will the function of each terminal and the location in the operating circuit 200 into which it is connected. Therefore, the test harness may also include other types of lines, so that the number of the test harnesses corresponds to the number of the terminals of the sensor 100, thereby enabling the sensor testing apparatus to adopt different settings according to different types of the sensor 100, and further simulating possible failure conditions of different types of the sensor 100.

To facilitate electrical connection of the first end 20 and the second end 30 with the sensor 100 and the operating circuit 200, respectively, as shown in fig. 2, the first end 20 may alternatively adopt a female terminal to connect with a corresponding terminal of the sensor 100, and the second end 30 may adopt a male terminal to access the operating circuit 200.

Fig. 3 is a schematic structural diagram of the first end 20 according to an embodiment of the present application.

In some embodiments, as shown in fig. 3, the first end 20 is provided with two elastic parts 22 disposed opposite to each other, and the elastic parts 22 are configured to provide an elastic force that causes the elastic parts 22 to have a tendency to move toward each other. It will be appreciated that the terminals of different sensors 100 (see fig. 2) are of different sizes, and that the terminals of the sensor 100 can be positioned between the two elastic portions 22 by providing the two elastic portions 22, and the terminals of the sensor 100 are subjected to clamping forces acting on opposite sides thereof by the elastic force of the elastic portions 22 in the direction of approaching the other elastic portion 22, so as to be fixedly connected to the first end 20 of the test harness. In addition, an accommodating space with two open ends can be formed between the two elastic parts 22, and when the terminal of the sensor 100 connected with the first end 20 is a sheet-shaped terminal, the accommodating space can be accommodated by the sheet-shaped terminal with any size, so that the applicability of the sensor testing device to different sensors 100 is improved.

Further, as shown in fig. 2 to 3, the distance between the two elastic parts 22 is gradually decreased and then gradually increased from the end connected to the first end 20 to the other end, so that when the terminal of the sensor 100 is located between the two elastic parts 22, surfaces of the two elastic parts 22 where the distance from each other is the smallest are respectively connected to opposite sides of the terminal of the sensor 100 to reliably clamp and fix the terminal of the sensor 100. In addition, both ends of the elastic portion 22 in the lengthwise extending direction are also made not to contact the terminals of the sensor 100, thereby facilitating insertion of the terminals of the sensor 100 between the two elastic portions 22.

In other embodiments, the first end 20 may be provided with other structures, as long as it is adapted to the terminal of the sensor 100 and is securely connected to the sensor 100, and is not limited herein.

In some embodiments, as shown in fig. 2, the first ends 20, the second ends 30 and the test ends 40 are respectively provided with an insulating member 50 at the outer periphery thereof, so that the first ends 20 of the plurality of test lines 10, the second ends 30 of the plurality of test lines 10 and the test ends 40 can be insulated from each other, thereby preventing accidents such as short circuit.

Alternatively, the insulating member 50 may employ a heat shrinkable tube. The heat shrinkable tube is a polyolefin heat shrinkable sleeve and has the advantages of softness, flame retardance, insulation, corrosion resistance and the like.

In one embodiment, the insulation 50 may be a single wall heat shrinkable tube, which allows the insulation 50 to be thinner in wall thickness, provides insulation and prevents mechanical damage or abrasion. In addition, by using a single wall heat shrink tube, the insulator 50 is smaller in size and lighter in weight.

In some embodiments, as shown in fig. 2, the sensor testing device further includes a connecting member 60, the connecting member 60 has a routing channel for the test line 10 to pass through and three outlets respectively communicating with the routing channel, and the first end 20, the second end 30 and the test end 40 respectively pass through one outlet. Thus, by arranging the connecting member 60, the plurality of test lines 10 are limited in the wiring channel, so that the sensor testing device can be used and carried conveniently, and by arranging three wire outlets on the connecting member 60, the plurality of first ends 20, the plurality of second ends 30 and the plurality of test ends 40 can be connected with the sensor 100, the working circuit 200 and the test meter respectively.

Alternatively, the connector 60 may be a single wall heat shrink tube to provide insulation and wear protection for the test harness, and to make the sensor testing device light weight, small, and portable.

In some embodiments, as shown in fig. 2, the connecting member 60 includes a first tube 62 and a second tube 64, a first routing channel is disposed in the first tube 62, two axial ends of the first tube 62 are provided with outlets, one end of the second tube 64 is connected to the outer circumferential wall of the first tube 62, a second routing channel is disposed in the second tube 64, and an outlet is disposed at an end of the second tube 64 away from the first tube 62. Thus, by providing the first tube 62 and the second tube 64, the three outlets are respectively located at different sides of the connector 60, so that the first end 20, the second end 30 and the testing end 40 are penetrated out from different sides of the connector 60, and in the actual testing process, sufficient space is respectively reserved for the sensor 100, the working circuit 200 and the testing meter, which is convenient for connection.

In one embodiment, the first end 20 and the second end 30 of the test harness extend through outlets provided at axially opposite ends of the first tube 62, and the test end 40 of the test harness extends through an outlet provided in the second tube 64.

Further, as shown in FIG. 2, the second tube 64 extends lengthwise perpendicular to the first tube 62 to facilitate distinguishing the first end 20, the second end 30, and the testing end 40, and to position the test meter between the sensor 100 and the operational circuitry 200 during actual use of the sensor testing device, thereby further preventing the test meter, the sensor 100, and the operational circuitry 200 from interfering with each other.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A sensor testing device for testing a sensor, the sensor testing device comprising:

and the test meter is electrically connected with the test end.

2. The sensor testing apparatus of claim 1, wherein the test lines include power lines and signal lines.

3. The sensor testing apparatus of claim 2, wherein the test line further comprises a ground line.

4. The sensor testing device of claim 1, wherein the first end is provided with two resilient portions disposed opposite to each other, the resilient portions being configured to provide a resilient force that tends to move the resilient portions toward each other.

5. The sensor testing apparatus of claim 4, wherein a distance between the two elastic portions gradually decreases and then gradually increases from one end connected to the first end to the other end.

6. The sensor testing apparatus of claim 1, wherein the first end, the second end, and the testing end are each provided with an insulator on an outer periphery thereof.

7. The sensor testing apparatus of claim 6, wherein the insulator comprises a heat shrink tube.

8. The sensor testing apparatus of claim 1, further comprising a connector;

9. The sensor testing device of claim 8, wherein the connector comprises a first tube and a second tube;

a first routing channel is arranged in the first pipe body, and the two ends of the first pipe body in the axial direction are provided with the wire outlets;

one end of the second pipe body is connected with the circumferential outer wall of the first pipe body, a second wiring channel is arranged in the second pipe body, and the wire outlet is formed in the end, away from the first pipe body, of the second pipe body.

10. The sensor testing device of claim 9, wherein a longitudinal extent of the second tube is perpendicular to a longitudinal extent of the first tube.