Linear displacement sensor testing equipment

Abstract

The utility model provides a linear displacement sensor test device which comprises a box body module, a power supply module, a switch control module, a logic conversion module, a signal display module and a connector module. The box body module realizes distributed installation and fixation of components and functional module identification, the power supply module converts alternating-current 220V voltage into direct-current 28V and 5V voltage, the switch control module controls on-off of the 28V and 5V voltage and load disconnection between the 28V and 5V voltage and the sensor, the logic conversion module switches power supply voltage of the tested sensor and selection of different test gears, and the power supply module is connected with the power supply module. And the signal display module is used for setting output voltage display and working current display. By utilizing the equipment, the sensor can displace according to a voltage test point given by technical requirements, the output performance is detected in real time, the test is simple and convenient, the detection precision is high, the stability is good, and the requirements of various performance index detection and fault location of linear displacement sensors of various models can be met.

Description

Technical Field

[0001] This utility model belongs to the field of sensor testing technology, specifically relating to a linear displacement sensor testing device. Background Technology

[0002] Linear displacement sensors are mainly used to measure the relative distances between various moving mechanical parts and angular displacement parameters that can be converted into linear displacement quantities. Linear displacement sensor testing equipment is mainly used to detect the output voltage and operating current of linear displacement sensors. Currently, many similar devices on the market can only test a single model of linear displacement sensor, and different power supplies are required depending on the model. The testing methods are manual, cumbersome, and have poor stability. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing linear displacement sensor testing equipment, which can only test a single type of linear displacement sensor, requires an external power supply, and has a manual, cumbersome, and unstable testing method. In response, this invention provides a linear displacement sensor testing device.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A linear displacement sensor testing device includes a housing module, a power supply module, a switch control module, a logic conversion module, a signal display module, and a connector module;

[0006] The enclosure module is used to distribute and fix the components and identify the functional modules, including the 6U chassis and front and rear panels;

[0007] The power supply module is used to convert AC 220V voltage to DC 28V and 5V voltage to provide working power for various models of line displacement sensors under test. It includes a socket and power cord for connecting to 220V AC power supply, two switching power supplies for outputting DC power to the line displacement sensor under test, and two adjustable potentiometers W1 and W2 for adjusting the DC voltage output of the two switching power supplies respectively.

[0008] The switch control module includes dual-channel single-pole switches K1, K2 and K3. Dual-channel single-pole switch K1 is used to control the connection and disconnection of the switching power supply with AC 220V. Dual-channel single-pole switches K2 and K3 are used to control the loading and disconnection of the DC 28V and 5V output by the switching power supply with the measured linear displacement sensor, respectively.

[0009] The logic conversion module includes a single-pole double-throw switch K4 and single-pole six-throw switches K5 and K6. The single-pole double-throw switch K4 is used to switch the power supply voltage of the measured linear displacement sensor. The single-pole six-throw switch K5 is used to control the corresponding model of linear displacement sensor to be supplied with DC power. The single-pole six-throw switch K6 is used to control the corresponding model of linear displacement sensor to output signals.

[0010] The signal display module includes a first DC voltmeter and a second DC voltmeter for displaying DC power supply voltages of 28V and 5V respectively, a third DC voltmeter for displaying the output voltage of the measured linear displacement sensor, and a DC ammeter for displaying the operating current of the measured linear displacement sensor.

[0011] The connector module is used to connect different types of linear displacement sensors under test.

[0012] Furthermore, the power supply module also includes AC 220V indicator, DC 28V indicator and DC 5V indicator for indicating the on and off of AC 220V, DC 28V and DC 5V respectively.

[0013] Furthermore, the power supply module also includes a 220V fuse holder connected in series with the dual-pole switch K1 and two 2A fuses connected in series with the dual-pole switches K2 and K3 respectively.

[0014] Furthermore, the first and second DC voltmeters are both selected as DC voltmeter MB3104, the third DC voltmeter is selected as DC voltmeter MB4103, and the DC ammeter is selected as DC ammeter MB3204A.

[0015] Furthermore, the connector module includes multiple sets of cables and corresponding aviation connectors.

[0016] Furthermore, there are five aviation connectors.

[0017] The advantages of this utility model are:

[0018] The linear displacement sensor testing equipment proposed in this invention connects to various sensor models via a connector module. Depending on the sensor model being tested, different power switches control the supply of 28VDC and 5VDC power to different sensor models, and different test ranges are selected to set the output voltage and operating current displays. The sensor moves according to the voltage test point given in the technical requirements, thereby detecting the output performance in real time. Therefore, this testing equipment can record changes throughout the entire process, with high detection accuracy and good stability, and can accurately diagnose faults such as output jumps in linear displacement sensors. Furthermore, the testing equipment has strong compatibility, easily connecting to different sensors and meeting the performance index testing and fault location requirements of various models of linear displacement sensors. The testing equipment only requires an external 220V AC power supply to complete the testing of various sensor models, making the testing process simple and efficient. Attached Figure Description

[0019] The above and / or other features and advantages of the present invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0020] Figure 1 This is a panel view of the linear displacement sensor testing device of this utility model;

[0021] Figure 2 This is a schematic diagram of the linear displacement sensor testing device of this utility model; Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0023] It should be noted that, in the context of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] This invention provides a linear displacement sensor testing device for detecting the output voltage and operating current of various types of linear displacement sensors, in order to test whether the performance indicators of each displacement sensor meet the requirements and whether they meet the fault location requirements.

[0026] Reference Figure 1 and Figure 2 The linear displacement sensor testing equipment provided by this utility model includes a housing module, a power supply module, a switch control module, a logic conversion module, a signal display module, and a connector module. The housing module is used for the distributed installation and fixing of components and for identifying functional modules; the power supply module converts AC 220V voltage to DC 28V and 5V voltage to provide operating power for various models of linear displacement sensors under test; the switch control module controls the connection and disconnection of AC 220V, DC 28V, and 5V; the logic conversion module switches the power supply voltage of the displacement sensor, i.e., performs current selection measurement, and controls the power supply to specific sensor models and the signal output of specific sensor models; the connector module is used to connect different models of linear displacement sensors under test.

[0027] The enclosure module includes a 6U chassis and front and rear panels. Generally, switches and other devices that require operator control, as well as voltmeters and ammeters that display results to the operator, are installed on the front panel. Other devices and connecting wires are located inside the enclosure, and the external interfaces of the test equipment are reserved on the rear panel.

[0028] The power supply module includes a socket and power cord for connecting to a 220V AC power supply, two switching power supplies for outputting DC power to the measured linear displacement sensor, and two adjustable potentiometers W1 and W2 for adjusting the DC output voltage of the two switching power supplies. The switching power supplies can be of the same specification, such as a 0-30V adjustable / 5A type. One of the potentiometers is responsible for adjusting the 28V, and the other for adjusting the 5V.

[0029] In the illustrated embodiment, the power supply module also includes AC 220V indicator, DC 28V indicator, and DC 5V indicator for indicating the on and off states of AC 220V, DC 28V, and DC 5V, respectively, so that operators can intuitively select and adjust the power supply voltage according to different sensor models.

[0030] In addition, preferably, for circuit protection, the power supply module also includes a 220V fuse holder connected in series with the dual-pole switch K1 and two 2A fuses connected in series with the dual-pole switches K2 and K3 respectively.

[0031] The switch control module includes dual-channel single-pole switches K1, K2, and K3. Dual-channel single-pole switch K1 is used to control the connection and disconnection of the switching power supply with AC 220V. Dual-channel single-pole switches K2 and K3 are used to control the loading and disconnection of the DC 28V and 5V output from the switching power supply with the measured linear displacement sensor, respectively.

[0032] The logic conversion module includes a single-pole double-throw switch K4 and single-pole six-throw switches K5 and K6. Single-pole double-throw switch K4 is used to switch the power supply voltage of the measured linear displacement sensor. Single-pole six-throw switch K5 controls the DC power supply to the corresponding model of linear displacement sensor. Single-pole six-throw switch K6 controls the signal output of the corresponding model of linear displacement sensor. For example, there are five models of the measured sensor: -370, -100, -150, -300, and -150A. These models require two power supply voltages (28V and 5V), which correspond to two operating currents. The -370A model requires one voltage, while the other models (-100 / 150 / 300 / 150A) require the other. Therefore, only single-pole double-throw switch K4 needs to be toggled to select the current. After selecting the power supply voltage, single-pole six-throw switches K5 and K6 are then toggled according to the specific model to detect the operating current and output voltage of that model of sensor.

[0033] The signal display module includes a first DC voltmeter and a second DC voltmeter for displaying DC supply voltages of 28V and 5V respectively, a third DC voltmeter for displaying the output voltage of the measured line displacement sensor, and a DC ammeter for displaying the operating current of the measured line displacement sensor. The displays of these instruments can be arranged above the front panel of the device. Indicator lights can be located at the lower left of these displays. A potentiometer is located below the indicator lights, and below the potentiometers are double-pole single-throw switches K1, K2, and K3. Simultaneously, a single-pole double-throw switch K4 and single-pole six-throw switches K5 and K6 can be arranged below the displays to the right of the indicator lights and potentiometers. In a specific embodiment of this invention, the first and second DC voltmeters are both selected as DC voltmeter MB3104 with a range of DC ±199.9V, the third DC voltmeter is selected as DC voltmeter MB4103 with a range of DC ±19.999V, and the DC ammeter is selected as DC ammeter MB3204A with a range of DC ±199.9mA.

[0034] The connector module includes multiple sets of cables and corresponding aviation connectors. Five aviation connectors can be installed, fixed to the lower right of the front panel of the device, below the single-pole double-throw switch K4 and the single-pole six-throw switches K5 and K6, and to the right of switches K1, K2, and K3.

[0035] The wiring connections between the components in the various modules of the test equipment can be achieved using known and mature technologies as described above. Specifically, the external 220V AC power supply is connected to the 220V AC socket of the test equipment via a power cord. After the 220V voltage is introduced into the test equipment, it passes through the 220V fuse holder (including a 2A fuse), the K1 switch, and the 220V indicator light. The K1 switch controls the connection and disconnection of the 220V, and the 220V indicator light indicates the current connection / disconnection status. The 220V power supply is split into two paths and connected to the L and N input terminals of the DC28V and DC5V switching power supply modules to convert 220V to 28V and 5V respectively. The positive terminal of the DC28V switching power supply output is connected to the 28V fuse holder (including a 2A fuse), then to the K2 switch, the positive terminal of the 28V indicator light, and the positive terminal of the 28V voltmeter. The negative terminal of the DC28V switching power supply output is connected to the negative terminal of the 28V indicator light and the negative terminal of the 28V voltmeter to control the DC output, indicate the on / off status, and display the voltage. The control principle of the DC5V power supply is the same.

[0036] The upper end of the single-pole double-throw switch K4 is connected to the positive terminal of a 28V voltmeter (i.e., connected to 28V DC power), and the lower end of switch K4 is connected to the positive terminal of a 5V voltmeter (i.e., connected to 5V DC power). Moving switch K4 up and down allows selection of whether to connect to 28V DC or 5V DC power, depending on the voltage required by different sensor models. The common terminal of switch K4 is connected to a working ammeter A to display the operating current of different sensors. The rear end of ammeter A is connected to the common terminal of switch K5. Rotating switch K5 to different positions enables logic control of power supply to different sensor models. The front end of switch K6 is connected to the positive terminal of output voltmeter V. The negative terminal of voltmeter V is shorted to the negative terminals of the power supply and output signals of various sensor models and connected to a terminal block. The terminal block is connected to the negative terminals of two switching power supplies. When switch K6 is rotated to different positions, output voltmeter V displays the output signals of different sensor models.

[0037] When testing the output signal of a linear displacement sensor using the testing equipment provided by this utility model, connect the sensor to the testing equipment. Based on the model of the sensor being tested, the three switches in the logic conversion module must be coordinated for consistent conversion. Determine the current measurement category based on the model of the linear displacement sensor being tested, and then select the power supply and output measurement based on the specific model of the sensor. For example, with K1 and K2 connected and switches K4, K5, and K6 all set to the "-370" position, with the cable in its natural state, the measured output voltage should be 0.2V ± 40mV. When the sensor cable clamp is stretched to the maximum displacement, the measured output voltage should be 9.9V ± 40mV. The output performance at other points should meet the technical requirements. After checking, disconnect all switches. The accuracy of all parameters detected by the verification equipment meets the accuracy requirements of the tested product.

[0038] Therefore, as described above, this invention can control the power supply of different sensor models to 28VDC and 5VDC through different power switches according to the sensor model being tested, and select different test ranges to set the output voltage display and operating current display. The sensor moves according to the voltage test point given by the technical requirements, thereby detecting the output performance in real time. Thus, this testing equipment can record changes throughout the entire process, with high detection accuracy and good stability, and can accurately determine faults such as output jumps in linear displacement sensors. Furthermore, this testing equipment has strong compatibility, can easily connect to different sensors, and can meet the performance index testing and fault location requirements of various models of linear displacement sensors. The testing equipment only needs an external 220V AC power supply to complete the testing of various sensor models, and the testing process is simple and efficient.

[0039] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. A linear displacement sensor testing device, characterized in that: It includes a housing module, a power supply module, a switch control module, a logic conversion module, a signal display module, and a connector module; The enclosure module is used to realize the distributed installation and fixation of components and the identification of functional modules, including a 6U chassis and front and rear panels; The power supply module is used to convert AC 220V voltage into DC 28V and 5V voltage to provide working power for various types of line displacement sensors under test. It includes a socket and power cord for connecting to a 220V AC power supply, two switching power supplies for outputting DC power to the line displacement sensor under test, and two adjustable potentiometers W1 and W2 for adjusting the magnitude of the DC voltage output by the two switching power supplies respectively. The switch control module includes dual-channel single-pole switches K1, K2 and K3. The dual-channel single-pole switch K1 is used to control the connection and disconnection of the switching power supply with AC 220V. The dual-channel single-pole switches K2 and K3 are respectively used to control the loading and disconnection of the DC 28V and 5V output by the switching power supply with the measured linear displacement sensor. The logic conversion module includes a single-pole double-throw switch K4 and single-pole six-throw switches K5 and K6. The single-pole double-throw switch K4 is used to switch the power supply voltage of the measured linear displacement sensor. The single-pole six-throw switch K5 is used to control the corresponding model of linear displacement sensor to be supplied with DC power. The single-pole six-throw switch K6 is used to control the corresponding model of linear displacement sensor to output a signal. The signal display module includes a first DC voltmeter and a second DC voltmeter for displaying DC power supply voltages of 28V and 5V respectively, a third DC voltmeter for displaying the output voltage of the measured linear displacement sensor, and a DC ammeter for displaying the operating current of the measured linear displacement sensor. The connector module is used to connect different types of linear displacement sensors under test.

2. The linear displacement sensor testing device according to claim 1, characterized in that: The power supply module also includes an AC 220V indicator, a DC 28V indicator, and a DC 5V indicator for indicating the on and off states of AC 220V, DC 28V, and DC 5V, respectively.

3. The linear displacement sensor testing device according to claim 1 or 2, characterized in that: The power supply module also includes a 220V fuse holder connected in series with the dual-channel single-pole switch K1 and two 2A fuses connected in series with the dual-channel single-pole switches K2 and K3 respectively.

4. The linear displacement sensor testing device according to claim 1 or 2, characterized in that: The first and second DC voltmeters are both selected as DC voltmeter MB3104, the third DC voltmeter is selected as DC voltmeter MB4103, and the DC ammeter is selected as DC ammeter MB3204A.

5. The linear displacement sensor testing device according to claim 1 or 2, characterized in that: The connector module includes multiple sets of cables and corresponding aviation connectors.

6. The linear displacement sensor testing device according to claim 5, characterized in that: The aviation connector has five parts.

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