A speed sensor test circuit and control device

Abstract

The utility model discloses a speed sensor test circuit and control device, belonging to the technical field of speed sensor testing. The speed sensor test and control device includes an electrically connected channel conversion unit and a state indication unit, wherein the channel conversion unit includes a conversion switch TS and a test switch CS, which are used to select a test method and a tested channel of the speed sensor; the state indication unit includes components such as a channel indicator light and a voltmeter, which are used to indicate the current test state and test results. The utility model can realize sequential and accurate testing of each channel of a multi-channel speed sensor in conjunction with a single-channel speed sensor test bench by selecting different gear positions of the test switch CS and the channel selection switch TS, and can conveniently perform performance tests on each channel of a multi-channel speed sensor at the same time in conjunction with a speed gear.

Description

Technical Field

[0001] The utility model relates to the technical field of speed sensor testing, in particular to a speed sensor testing circuit and a control device. Background Art

[0002] With the continuous development of urban rail transit, the manufacturing of subway electric passenger cars has gradually accelerated, and the types of speed sensors used in subway electric passenger cars have increased accordingly. With the improvement of electric passenger car technology, the use of multi-channel speed sensors on electric passenger cars has increased. However, different types of speed sensors need to be equipped with matching test benches for testing, which not only increases the cost of equipment purchase, but also requires testers to select matching test benches according to different types of speed sensors during the test process, which increases the test time of testers. Utility Model Content

[0003] The purpose of the utility model is to provide a speed sensor testing and control device to address the deficiencies in the prior art and to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a speed sensor test and control device includes an electrically connected channel conversion unit and a state indication unit, wherein the channel conversion unit includes a conversion switch TS and a test switch CS, which are used to select a test method and a tested channel of the speed sensor; the state indication unit includes components such as a channel indicator light and a voltmeter, which are used to indicate the current test state and test results. The utility model can realize sequential and accurate testing of each channel of a multi-channel speed sensor in conjunction with a single-channel speed sensor test bench by selecting different gear positions of the test switch CS and the channel selection switch TS, and can conveniently perform performance tests on each channel of a multi-channel speed sensor at the same time in conjunction with a speed gear.

[0005] Preferably, the status indicating unit includes a DC switching power supply, a fuse F1, an indicator light SL, an indicator light L1, an indicator light L2, a power switch CB, a voltmeter V1 and a voltmeter V2, the voltmeter V1 displays the performance test status of the speed sensor channel 1 under test, the voltmeter V2 displays the performance test status of the speed sensor channel 2 under test, the indicator light SL indicates the current working status of the speed sensor test and control device, a pin 1 of the DC switching power supply is electrically connected to an external power supply, one side of the DC switching power supply is electrically connected to an external AC power supply through the power switch CB, and the other side supplies power to the speed sensor test and control device through the fuse.

[0006] A multi-channel speed testing device comprises the channel testing circuit described above.

[0007] Preferably, comprising a housing;

[0008] At least two sets of displays are arranged transversely on the housing;

[0009] at least two sets of channel indicator lights, mounted longitudinally on the housing and located below the display;

[0010] A first knob, located on one side of the channel indicator light;

[0011] a second knob, located on the side of the first knob;

[0012] Power Indicator Light. Located on the side of the monitor.

[0013] Preferably, the first knob is provided with two gear positions.

[0014] Preferably, the second knob is provided with three gears.

[0015] Beneficial effects: By selecting different test switches and cooperating with the single-channel speed sensor test bench, accurate measurements can be made on single-channel speed sensors of different models. Secondly, the speed gear can also be used to simultaneously and accurately measure each channel of the multi-channel speed sensor in sequence, thereby improving the test efficiency of the multi-channel speed sensor. In addition, the compact design makes it easy for testers to carry it to different environments for practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the circuit diagram of the speed sensor test and control device of the utility model;

[0017] Figure 2 and Figure 3 The utility model is a circuit diagram and a simplified schematic diagram for accurately testing multi-channel speed sensors in sequence in cooperation with a single-channel speed sensor test bench;

[0018] Figure 4 and Figure 5 The utility model is a circuit diagram and a simplified schematic diagram for testing the performance of a multi-channel speed sensor;

[0019] Figure 6 It is a schematic diagram of the overall structure of the testing device of the utility model.

[0020] Figures 1 to 6 The reference numerals in the figure are: housing 1, display 2, channel indicator light 3, first knob 4, second knob 5, power indicator light 6. DETAILED DESCRIPTION

[0021] Please refer to Figures 1 to 6The utility model provides a technical solution: a speed sensor test circuit, including a channel conversion unit and a state indication unit, wherein the channel conversion unit is electrically connected to the state indication unit, and the channel conversion unit includes a conversion switch TS and a test switch CS, wherein the conversion switch TS adopts a rotary switch of the LW39-16CU-9AA-3222X / 3-RW type, and the test switch CS adopts a self-modified two-gear 8-contact rotary switch. The gear ① of the test switch CS is electrically connected to an external test bench at one end, and electrically connected to a speed sensor at the other end; the gear ② of the test switch CS includes multiple groups of contacts, which are used to realize the connection between the power supply of the speed sensor test and control device and the speed sensor, and the connection between the voltmeter V1 and the voltmeter V2 in the speed transmission channel to be tested and the negative pole of the power supply. The conversion switch TS includes channel 1, channel 2 and channel off, wherein channel 1 realizes the connection between channel 1 of the speed sensor to be tested and the speed sensor test bench, and the connection between the indicator light L1 and the power supply, and channel 2 realizes the connection between channel 2 of the speed sensor to be tested and the speed sensor test bench, and the connection between the indicator light and the power supply. By setting the gear position ① of the test switch CS and the gear position ② of the test switch CS, you can choose to test the multi-channel speed sensor through the single-channel speed sensor test bench or directly perform performance tests on each channel of the multi-channel speed sensor at the same time. The state indicating unit comprises a DC switching power supply, a fuse F1, an indicator light SL, an indicator light L1, an indicator light L2, a power switch CB, a voltmeter V1 and a voltmeter V2, wherein the DC switching power supply adopts an S-30-15 type DC switching power supply, the fuse adopts a φ10*38 type fuse, the indicator light SL is a green indicator light, the indicator lights L1 and L2 are both blue indicators, the power switch CB adopts an S261UC-C1 type switch, the voltmeters V1 and V2 adopt DC0.00~19.99V DC voltmeters, the voltmeters V1 and V2 are connected to the power supply of the speed sensor test and control device through the gear position ② of the test switch CS, the test interface is respectively connected to the channel 1 and the channel 2 of the speed sensor to be tested, one end of the indicator light SL is electrically connected to the gear position ② of the test switch CS, and the other end is electrically connected to the indicator lights L1, the indicator light L2 and the external speed sensor at the same time, one side of the DC switching power supply is electrically connected to the external AC power supply through the power switch CB, and the other side supplies power to the speed sensor test and control device through the fuse.When the power switch CB is closed, the indicator light SL is energized, indicating that the speed sensor test and control device starts to work; when the test switch CS selects the gear position ①, the speed sensor under test is connected to the single-channel speed sensor test bench, and the channel selection switch TS selects channel 1 and channel 2 in turn for precise testing, and the corresponding indicator light L1 or L2 is energized; when the test switch CS selects the gear position ②, the speed sensor under test directly passes through the speed sensor test and control device to simultaneously perform multi-channel performance tests, the electrical terminal of the speed sensor under test is directly connected to the speed sensor test and control device, the probe end is close to the rotatable gear disc, and the performance test status is displayed in the voltmeter V1 and the voltmeter V2.

[0022] The speed sensor is tested by providing an external signal to the speed sensor, which is usually provided by a rotating gear, and comparing the difference between the return signal of the speed sensor signal channel and the provided external signal to judge the quality of the speed sensor. At the same time, the speed sensor needs an external power supply to work, so it needs to be powered when testing the speed sensor.

[0023] When the speed sensor needs to be tested, when the test switch CS is selected to gear position ①, the speed sensor to be tested is connected to the single-channel speed sensor test bench through the speed sensor test and control device, and the speed sensor test bench supplies power to the speed sensor. After the speed sensor test bench is started, the gear on the test bench provides a signal to the speed sensor. After the speed sensor probe detects the signal, it feeds back the detected signal through the signal channel. When the channel selection switch TS selects different channels in turn, the signal channel of the speed sensor test bench receives the signal of each channel in turn and measures it accurately, so as to accurately judge the quality of each channel of the speed sensor. The testable speed sensor models include STN31451 / 330006K, STN31451 / 270006K, STN31450 / 360A18U, STN31451 / 380A20U, STN31450 / 300A25U, LENORD+BAUER 247Y416, ROW HANKINS ISAF808SA001, etc.; the indicator light SL in the status indicator unit indicates the working status of the speed sensor test and control device, and the channel indicator lights L1 and L2 indicate the current tested channel; the test circuit is as follows Figure 2 As shown, the simplified test schematic is as follows Figure 3As shown. When the test switch CS is in gear position ②, the speed sensor to be tested is directly connected to the speed sensor test and control device and the external speed gear disc, and the performance test is performed on each channel of the multi-channel speed sensor at the same time. The speed sensor is powered by the speed sensor test and control device, and the external rotatable gear disc provides signals to the speed sensor. The voltmeters V1 and V2 on the speed sensor test and control device simultaneously display the return signals of the speed sensor channels 1 and 2; all speed sensor models that can be tested when the above test switch CS is in gear position 1 can be tested. After the test starts, the voltmeters V1 and V2 in the status indication unit simultaneously display the performance status of channels 1 and 2 respectively, and the indicator light SL indicates the working status of the speed sensor test and control device. A multi-channel speed test device includes a channel test circuit as described above, and also includes a shell 1, at least two groups of displays 2, at least two groups of channel indicator lights 3, a first knob 4, a second knob 5 and a power indicator light 6. In this embodiment, two groups of displays 2 and two groups of channel indicator lights 3 are used, wherein the displays 2 are voltmeters V1 and V2 in the test circuit, the channel indicator lights 3 are indicator lights L1 and L2 in the test circuit, the power indicator light 6 is the indicator light SL in the test circuit, the first knob 4 is a conversion switch TS in the test circuit, and the second knob 5 is a test switch CS in the test circuit. The conversion switch TS and the test switch CS can be adjusted by operating the first knob 4 and the second knob 5.

[0024] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A speed sensor test circuit, characterized in that: It includes an electrically connected channel conversion unit and a state indicating unit, wherein the channel conversion unit includes a conversion switch TS and a test switch CS, which are used to select a test method and a tested channel of a speed sensor; the state indicating unit includes at least a channel indicator light and a voltmeter component, which are used to indicate a current test state and a test result; the test switch CS has a gear position ① and a gear position ② including multiple groups of contacts, which are used to select a test method; the channel conversion unit also has a channel 1 and a channel 2 including two groups of contacts and a gear position OFF, which are used to select a tested channel of the speed sensor.

2. A speed sensor test circuit according to claim 1, characterized in that: The status indication unit includes a DC switching power supply, a fuse F1, an indicator light SL, an indicator light L1, an indicator light L2, a power switch CB, a voltmeter V1 and a voltmeter V2. The voltmeter V1 displays the performance test status of the speed sensor channel 1 under test, and the voltmeter V2 displays the performance test status of the speed sensor channel 2 under test. The indicator light SL indicates the working status of the current speed sensor test and control device. One side of the DC switching power supply is electrically connected to the external AC power supply through the power switch CB, and the other side supplies power to the speed sensor test and control device through the fuse.

3. A speed sensor test control device, characterized in that: The invention comprises the circuit described in any one of claims 1 to 2.

4. A speed sensor test control device according to claim 3, characterized in that: including a housing; At least two sets of displays are arranged transversely on the housing; at least two sets of channel indicator lights, mounted longitudinally on the housing and located below the display; A first knob, located on one side of the channel indicator light; a second knob, located at one side of the first knob; A power indicator light is located on one side of the display.

5. A speed sensor test control device according to claim 4, characterized in that: The first knob is provided with two gear positions.

6. A speed sensor test control device according to claim 4, characterized in that: The second knob is provided with three gear positions.

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