Automatic testing device for short-stroke displacement sensor

Abstract

The utility model belongs to the technical field of testing, and discloses an automatic testing device for a short-stroke displacement sensor, which comprises a control system and a testing platform, the testing platform comprises a driving motor and a sensor fixing platform, and the sensor fixing platform is provided with a structure for fixing the displacement sensor. A fixed part of the driving motor is fixed relative to the sensor fixing platform, and a movable part of the driving motor is connected with and drives a sensor stator of the displacement sensor to move; and the control system is connected with and controls the driving motor and is connected with a signal interface of the displacement sensor. According to the utility model, the linear motor is used as a high-precision driving motor, and high-precision signal control can be adopted, so that the automation of short-stroke displacement sensor testing is realized, the testing efficiency is improved, the labor cost is reduced, and the large-scale production requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the test technical field relates to a displacement sensor's testing arrangement, specifically relates to a short stroke displacement sensor automatic testing device. BACKGROUND

[0002] The displacement sensor plays an important role in the hydraulic system, and its accurate position feedback plays a crucial role in the accuracy and reliable stability of the hydraulic system. The traditional displacement sensor test usually adopts a hand-operated screw rod for testing, which loads the displacement sensor by hand-operated screw rod, and then compares the data of the displacement sensor by reading the moving parameters of the hand-operated screw rod. This method is inefficient, and the test results are greatly affected by human factors, which easily leads to inaccurate test data, consumes a lot of manpower, and cannot meet the production demand. UTILITY MODEL CONTENT

[0003] To solve the problems of unstable test results and low efficiency of the existing manual sensor test platform during testing, the utility model provides a short stroke displacement sensor automatic testing device, which can accurately and quickly complete sensor testing, realize the automation of short stroke displacement sensor testing, improve test efficiency, reduce labor cost, and meet large-scale production demand.

[0004] The technical scheme of the utility model is as follows:

[0005] A short stroke displacement sensor automatic testing device, comprising a control system and a test platform, the test platform comprising a driving motor and a sensor fixing platform, the sensor fixing platform being provided with a structure for fixing the displacement sensor, the fixed part of the driving motor being fixed relative to the sensor fixing platform, and the moving part of the driving motor being connected to and driving the sensor stator of the displacement sensor to move; the control system is connected to and controls the driving motor, and the control system is connected to the signal interface of the displacement sensor.

[0006] Further, the control system comprises an upper computer, a digital multimeter group, a driving unit, a control unit and a power supply; the upper computer, the digital multimeter group, the driving unit and the control unit are signal connected with each other, and the power supply is electrically connected between the upper computer, the digital multimeter group, the driving unit and the control unit.

[0007] Further, the driving unit is control connected between the driving motor.

[0008] Further, the sensor fixing platform comprises a base, a V-shaped groove block and a positioning block, the V-shaped groove block is fixed on the base, the top of the V-shaped groove block is matched with the sensor stator part of the displacement sensor in shape, the bottom of the positioning block is matched with the sensor stator part in shape, and the positioning block can move up and down and be fixed relative to the base.

[0009] Further, the fixed part of the driving motor is installed on the base, and the moving direction of the moving part of the driving motor is consistent with the axial direction of the displacement sensor.

[0010] Further, the driving motor is provided with a lead screw, and the moving part of the driving motor moves relative to the fixed part of the driving motor through the lead screw.

[0011] Further, the moving part of the driving motor is provided with a chuck, and the clamping opening of the chuck is matched with the sensor rotor of the displacement sensor.

[0012] The utility model discloses the advantages are:

[0013] The utility model discloses a short stroke displacement sensor test device, including the test platform, the driving motor, the displacement sensor, the signal processor, the V -shaped groove block, the positioning block, the sensor rotor, the sensor stator and the chuck, the test platform is installed on the base, the driving motor is installed on the test platform, the displacement sensor is installed on the test platform, the signal processor is installed on the test platform, the V -shaped groove block is installed on the test platform, the positioning block is installed on the test platform, the sensor rotor is installed on the test platform, the sensor stator is installed on the test platform, the chuck is installed on the test platform, the driving motor is installed on the base, and the moving direction of the moving part of the driving motor is consistent with the axial direction of the displacement sensor. ACCURACY

[0014] In order to more clearly illustrate the technical scheme of the utility model patent embodiment, the following will be needed to use the drawings in the embodiment briefly introduced, should understand, the following drawings only shows some embodiments of the utility model patent, therefore should not be seen as the limited scope, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0015] Figure 1 It is the whole schematic diagram of the testing device of the utility model,

[0016] Figure 2 It is the testing platform schematic diagram of the utility model,

[0017] Among them: 1 - host computer, 2 - digital multimeter group, 3 - driving unit, 4 - control unit, 5 - power supply, 6 - test platform, 61 - driving motor, 62 - base, 63 - lead screw, 64 - signal processor, 65 - V-shaped groove block, 66 - positioning block, 67 - sensor rotor, 68 - sensor stator, 69 - chuck. CONCRETE IMPLEMENTATION

[0018] This part is the embodiment of the utility model, for explaining and illustrating the technical scheme of the utility model.In the case of no conflict, the embodiment of the utility model and the features in the embodiment can be combined with each other.

[0019] In the description of the utility model, it needs to be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship of the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or the case must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0020] In the description of the utility model, it needs to be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be interpreted broadly, for example, it can be fixed connection, can also be detachable connection or integrated connection, can be mechanical connection, can also be point connection, can be direct connection, can also be indirect connection through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0021] Example 1

[0022] A kind of short stroke displacement sensor automatic testing device, including control system and test platform 6, test platform 6 includes drive motor 61 and sensor fixed platform, sensor fixed platform is equipped with the structure of fixed displacement sensor, the fixed part of drive motor 61 is fixed relative to sensor fixed platform, the moving part of drive motor 61 is connected and drives the sensor rotor 67 of displacement sensor and moves;Control system is connected and controls drive motor 61, control system is connected with the signal interface of displacement sensor.

[0023] Control system includes host computer 1, digital multimeter group 2, drive unit 3, control unit 4 and power supply 5;Host computer 1, digital multimeter group 2, drive unit 3, control unit 4 are signal connected between each other, power supply 5 is electrically connected between host computer 1, digital multimeter group 2, drive unit 3 and control unit 4.

[0024] Drive unit 3 and drive motor 61 are controlledly connected.

[0025] The sensor fixing platform comprises a base 62, a V-shaped groove block 65 and a positioning block 66, the V-shaped groove block 65 is fixed on the base 62, the top of the V-shaped groove block 65 matches the partial shape of the sensor stator 68 of the displacement sensor, the bottom of the positioning block 66 matches the partial shape of the sensor stator 68, and the positioning block 66 can move up and down and be fixed relative to the base 62.

[0026] The fixed part of the driving motor 61 is installed on the base 62, and the moving direction of the moving part of the driving motor 61 is consistent with the axial direction of the displacement sensor.

[0027] The driving motor 61 is provided with a lead screw 63, and the moving part of the driving motor 61 moves relative to the fixed part of the driving motor 61 through the lead screw 63.

[0028] The moving part of the driving motor 61 is provided with a chuck 69, and the clamping opening of the chuck 69 matches the sensor rotor 67 of the displacement sensor.

[0029] Embodiment 2:

[0030] The upper computer 1, the digital multimeter group 2, the driving unit 3, the control unit 4, the power supply 5 and the test platform 6. The upper computer 1 is used for transmitting and processing the feedback signal of the control unit 4 and outputting; one of the digital multimeter group 2 is used for monitoring the power voltage, and the other two are used for detecting the output voltage of the sensor; the power supply 5 is used as the excitation of the sensor, when the sensor is a resistance sensor, it is a direct current stabilized power supply; when the sensor is an inductive sensor, it is a medium frequency stabilized power supply; the driving unit 3 is used for controlling the operation of the driving motor 61 on the test platform 6; the control unit 4 is used for transmitting signal to control the driving unit 3, receiving the feedback signal of the driving motor and transmitting to the upper computer to complete the communication; the test platform 6 is a collection platform composed of multiple components, which mainly completes the sensor test operation by clamping the sensor stator 68 of the measured sensor and moving the sensor rotor 67 together with the test platform 6;

[0031] The V-shaped groove block 65 is used for placing the sensor stator 68 of the measured sensor, and the V-shaped groove block 65 and the upper positioning block 66 together clamp and fix the measured sensor stator 68, the other side chuck 69 clamps the sensor rotor 67, and they move together along the lead screw 63 to perform the preset trajectory movement;

[0032] The driving motor 61 and the signal processor 64 are installed above the base 62, in the test process, the driving unit 3 is controlled by the control unit 4 to transmit signal to the driving motor 61, so that the driving motor 61 drives the chuck 69 to move along the lead screw 63 to perform the preset trajectory movement, the signal processor 64 feeds back the current position signal of the chuck 69 to the driving unit 3, completes the closed loop control of the displacement of the test platform 6, and makes the chuck 69 drive the measured sensor rotor 67 to move to the expected position;

[0033] The host computer 1 software transmits signals to the driving unit 3 by reading the position measurement points made by the electronic table, and controls the driving motor 61 to operate; the host computer 1 processes and records the signals fed back to the control unit 4 by the signal processor 64, and finally outputs an electronic report;

[0034] The digital multimeter group 2 is used for collecting the resistance, voltage and current information of the measured sensor and the voltage, current and frequency information input by the power supply 5, and transmitting signals to the control unit 4, which further transmits the signals to the host computer 1.

[0035] Embodiment 3:

[0036] The utility model discloses a small platform structure is used as test platform, it is mainly used for improving short stroke displacement sensor's automatic test work efficiency and test accuracy.

[0037] Please see Figure 1 The utility model discloses a test device schematic drawing, the utility model provides a kind of short stroke displacement sensor automatic testing device, including host computer 1, digital multimeter group 2, driving unit 3, control unit 4, power supply 5 and test platform 6, wherein: power supply 5 is as the excitation of test device, provides power for entire test device;Control unit 4 is located above power supply 5, for receiving digital multimeter group 2, power supply 5 and driving motor 61 signal, and transmit to host computer 1;Driving unit 3 is located above control unit 4, for receiving control unit 4 instruction, and transmit to driving motor 61 and make it work;Digital multimeter group 2 is located above driving unit 3, for collecting the resistance, voltage, current information of measured sensor and the voltage, current and frequency information input by power supply 5;Test platform 6 is located at the right side of the first four modules, by multiple parts integration, for testing sensor;Host computer 1 is located behind test platform 6 and four modules, and is connected with other components by fiber optic cable, and host computer 1 obtains the current output, input etc. Parameter of measured sensor transmitted by control unit 4, test data is recorded to corresponding electronic table, while carrying out data processing, calculates the precision etc. Index of sensor, and judges whether it meets technical requirement.

[0038] Please see Figure 2 The utility model discloses a test platform schematic drawing, the base 62 of test platform 6 is equipped with driving motor 61 and signal processor 64, is equipped with screw rod 63 guide rail above it, chuck 69 is connected with test platform 6 by screw rod 63, measured sensor rotor 67 is clamped by chuck 69, and the other side carries out test with measured sensor stator 68, and sensor stator 68 is located above V-shaped groove block 65, and is clamped and fixed sensor stator 68 with the upper positioning block 66 jointly.

[0039] The working state of the testing device is as follows: the stator 68 of the sensor to be tested is placed between the V-shaped groove block 65 and the positioning block 66 and is clamped and fixed, the rotor 67 of the sensor is placed in the chuck 69 and is clamped and fixed, then the power supply 5 is started, the software of the upper computer 1 reads the testing data point position in the electronic form, sends the position signal to the driving unit 3 to drive the motor 61 to operate, drives the lead screw 63 to move the chuck 69, the control unit 3 receives the signals from the digital multimeter set 2, the power supply 5 and the driving motor 61 and transmits them to the upper computer 1, the upper computer 1 obtains the current output, input and other parameters of the sensor to be tested transmitted by the control unit 4, records the testing data to the corresponding electronic form, simultaneously processes the data, calculates the precision and other indexes of the sensor and judges whether the sensor meets the technical requirements or not, after the chuck 69 drives the sensor rotor 10 to the specified point, the actual position of the point is fed back by the signal processor 64 to complete the closed-loop control.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application.

Claims

1. A short stroke displacement sensor automatic testing apparatus characterized by comprising: The system includes a control system and a test platform (6). The test platform (6) includes a drive motor (61) and a sensor fixing platform. The sensor fixing platform is equipped with a structure for fixing displacement sensors. The fixed part of the drive motor (61) is fixed relative to the sensor fixing platform. The moving part of the drive motor (61) is connected to and drives the sensor mover (67) of the displacement sensor to move. The control system is connected to and controls the drive motor (61). The control system is connected to the signal interface of the displacement sensor.

2. The automatic test apparatus for a short stroke displacement sensor according to claim 1, characterized by, The control system includes a host computer (1), a digital multimeter group (2), a drive unit (3), a control unit (4), and a power supply (5); the host computer (1), the digital multimeter group (2), the drive unit (3), and the control unit (4) are interconnected by signals, and the power supply (5) is electrically connected to the host computer (1), the digital multimeter group (2), the drive unit (3), and the control unit (4).

3. A short stroke displacement sensor automatic testing device according to claim 2, characterized in that, The drive unit (3) is connected to the drive motor (61) for control.

4. The automatic test apparatus for a short stroke displacement sensor according to claim 1, characterized by, The sensor fixing platform includes a base (62), a V-shaped groove block (65), and a positioning block (66). The V-shaped groove block (65) is fixed on the base (62). The top of the V-shaped groove block (65) matches the shape of the sensor stator (68) of the displacement sensor. The bottom of the positioning block (66) matches the shape of the sensor stator (68). The positioning block (66) can move up and down and be fixed relative to the base (62).

5. A short stroke displacement sensor automatic testing device according to claim 4, wherein, The fixed part of the drive motor (61) is mounted on the base (62), and the moving part of the drive motor (61) moves in the same direction as the axial direction of the displacement sensor.

6. The automatic test apparatus for a short stroke displacement sensor according to claim 1, wherein The drive motor (61) is equipped with a lead screw (63), and the moving part of the drive motor (61) moves relative to the fixed part of the drive motor (61) through the lead screw (63).

7. The automatic test apparatus for a short stroke displacement sensor according to claim 1, characterized by, The moving part of the drive motor (61) is provided with a chuck (69) at its end, and the clamp of the chuck (69) matches the sensor mover (67) of the displacement sensor.

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