Angular travel error testing device of electric actuator

Abstract

The utility model relates to an angular travel error testing device of an electric actuator, which comprises a base, a fixing piece, an angular displacement sensor, a coupler, a power supply, a process calibrator and a digital display meter, the fixing piece is arranged on the base, the angular displacement sensor is arranged on the fixing piece, and the coupler is arranged on the process calibrator. The coupling is arranged on the angular displacement sensor, the power supply is arranged on one side of the base, the power supply is connected with the power supply end of a tested electric actuator, the process calibration instrument is arranged on one side of the power supply, and the process calibration instrument is connected with the power supply end of the tested electric actuator. The output end of the process calibration instrument is connected with the signal input end of the tested electric actuator, the digital display meter is arranged on one side of the process calibration instrument, and the digital display meter is connected with a signal line of the angular displacement sensor. Through mutual cooperation of the angular displacement sensor, the coupler, the power supply, the process calibration instrument and the digital display instrument, the precision of testing the angular travel error of the electric actuator is improved.

Description

Technical Field

[0001] The utility model relates to an angular travel error testing device for an electric actuator. Background Art

[0002] Electric actuators are widely used in the field of automation. They convert electrical energy into mechanical energy to drive actuators such as valves and robotic arms, and perform precise motion control on the actuators to achieve the switching, positioning and adjustment of the actuators. At present, the existing tests on electric actuators are mostly based on torque tests based on motor testing methods, and there are fewer tests on angular travel errors. In the market, the tests on the angular travel error of electric actuators are mostly based on the output value of the output current to calculate the actual travel, or visually measure the travel error based on the dial of the electric actuator. Since there are many factors that affect the transmission efficiency of the actuator, and the accuracy of the dial itself is not high, the data obtained often has large deviations. Some companies also use multimeters for precision adjustment, but the accuracy of the multimeter itself is not high (generally between 0.1% and 1%), so it also affects the accuracy of the angular travel error test or calibration of the electric actuator, and cannot truly reflect the accuracy characteristics of the electric actuator output. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] The technical problem to be solved by the utility model is how to improve the accuracy of the angular travel error test of the electric actuator.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: an angular stroke error testing device for an electric actuator, comprising a base, a fixing, an angular displacement sensor, a coupling, a power supply, a process calibrator and a digital display, wherein the fixing is arranged on the base, the angular displacement sensor is arranged on the fixing, and is used for the angular stroke error testing of the electric actuator, the coupling is arranged on the angular displacement sensor, and is used to connect the angular displacement sensor and the electric actuator, the power supply is arranged on one side of the base, the power supply is connected to the power supply end of the electric actuator to be tested, the process calibrator is arranged on one side of the power supply, the output end of the process calibrator is connected to the signal input end of the electric actuator to be tested, the digital display is arranged on one side of the process calibrator, and the digital display is connected to the signal line of the angular displacement sensor.

[0006] As a preferred solution of the angular stroke error testing device of the electric actuator of the utility model, wherein: two slide grooves are symmetrically opened on the upper surface of the base, the fixing member includes a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are both arranged in the two slide grooves, the first fixing plate is used to fix the electric actuator under test, and the angular displacement sensor is arranged on the second fixing plate to facilitate the adjustment of the distance between the electric actuator under test and the angular displacement sensor.

[0007] As a preferred solution of the angular stroke error testing device of the electric actuator of the utility model, a locking bolt is provided at the bottom of the base to lock and fix the first fixing plate and the second fixing plate.

[0008] As a preferred solution of the angular travel error test device of the electric actuator of the utility model, wherein: the coupling adopts an elastic coupling, so that the motor shaft of the electric actuator under test and the output shaft of the angular displacement sensor can rotate synchronously better.

[0009] As a preferred solution of the angular travel error testing device of the electric actuator described in the utility model, the power supply adopts a standard source of model Fluke 5550A, whose highest accuracy level is 93μV / V, so as to reduce the impact of changes in the power supply on the test results and improve the accuracy of the test. The process calibrator adopts the ConST326 model with an accuracy level of 0.015%RD+0.005%FS, and the angular displacement sensor adopts the MCJS series angle sensor to further improve the accuracy of the test.

[0010] Beneficial effect: Through the cooperation between the angular displacement sensor, coupling, power supply, process calibrator and digital display, the accuracy of the angular travel error test of the electric actuator is improved to ensure the performance and stability of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0012] Figure 1 It is a schematic diagram of the overall structure of the angular travel error testing device of the electric actuator.

[0013] Figure 2 The figure is a schematic diagram of the position structure of the fixing parts of the angular travel error testing device of the electric actuator.

[0014] In the figure: 1. base; 2. fixing member; 21. first fixing plate; 22. second fixing plate; 3. angular displacement sensor; 4. coupling; 5. power supply; 6. process calibrator; 7. digital display; 8. slideway; 9. electric actuator. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0018] Example

[0019] Reference Figure 1 and Figure 2 The present embodiment provides an angular stroke error test device for an electric actuator, including a base 1, a fixing member 2, an angular displacement sensor 3, a coupling 4, a power supply 5, a process calibrator 6 and a digital display 7. The fixing member 2 is arranged on the base 1, the angular displacement sensor 3 is arranged on the fixing member 2, and is used for angular stroke error test of the electric actuator 9. The coupling 4 is arranged on the angular displacement sensor 3, and is used to connect the angular displacement sensor 3 and the electric actuator 9. The power supply 5 is arranged on one side of the base 1, and the power supply 5 is connected to the power supply end of the electric actuator 9 to be tested. The process calibrator 6 is arranged on one side of the power supply 5, and the output end of the process calibrator 6 is connected to the signal input end of the electric actuator 9 to be tested. The digital display 7 is arranged on one side of the process calibrator 6, and the digital display 7 is connected to the signal line of the angular displacement sensor 3.

[0020] The base 1 is rectangular and serves as the installation base of the device. Through holes for fixing are opened on the four corners of the base 1. The base 1 can be fixed on any installation plane by screws to facilitate the installation and fixation of the base 1. A fixing member 2 is installed on the base 1. The angular displacement sensor 3 is installed on the base 1 through the fixing member 2. The angular displacement sensor 3 can realize high-precision testing of the angular stroke error of the electric actuator 9 to improve the accuracy of the angular stroke error test of the electric actuator 9 and ensure the performance and stability of the electric actuator 9. It should be noted that the angular displacement sensor 3 can select the corresponding accuracy level and range according to different parameter conditions of the electric actuator 9 to be tested. In this embodiment, the accuracy of the angular displacement sensor 3 is 0.5%, and the range is 0 to 180°. A coupling 4 is installed on the output shaft of the angular displacement sensor 3. The coupling 4 can realize reliable connection between the angular displacement sensor 3 and the electric actuator 9. A power supply 5 is placed in front of the base 1. The power supply 5 is connected to the electric actuator 9 to be tested through a connecting line. The power supply end of the actuator 9 is connected to provide power for the electric actuator 9 under test. A process calibrator 6 is arranged on the right side of the power supply 5. The process calibrator 6 connects its output end with the signal input end of the electric actuator 9 under test through a connecting line. The signal of the electric actuator 9 under test in this embodiment is 4-20mA. The process calibrator 6 can provide a standard analog current signal corresponding to the electric actuator 9 under test. A digital display 7 is arranged on the right side of the process calibrator 6 near the angular displacement sensor 3. The digital display 7 is connected to the angular displacement sensor 3 through a signal connecting line. The digital display 7 can monitor the output value of the sensor in real time and display the rotation angle of the electric actuator 9 under test. It should be noted that the signal of the electric actuator 9 under test in this embodiment is 4-20mA, that is, its control signal adopts a current value in the range of 4-20mA, wherein 4mA indicates that the motor shaft is at zero position (0% stroke), 20mA indicates that the motor shaft rotates to the limit position (100% stroke), and the intermediate values ​​correspond to different openings.

[0021] Furthermore, two slide grooves 8 are symmetrically opened on the upper surface of the base 1. Specifically, the fixing member 2 includes a first fixing plate 21 and a second fixing plate 22. The first fixing plate 21 and the second fixing plate 22 are both arranged in the two slide grooves 8. The first fixing plate 21 is used to fix the electric actuator 9 under test, and the angular displacement sensor 3 is arranged on the second fixing plate 22.

[0022] In this embodiment, two slide grooves 8 are symmetrically opened on the upper surface of the base 1. The fixing member 2 is mainly composed of a first fixing plate 21 and a second fixing plate 22. The first fixing plate 21 and the second fixing plate 22 are both slidably installed in the two slide grooves 8. The angular displacement sensor 3 is fixedly installed on the second fixing plate 22. During testing, the electric actuator 9 to be tested can be fixedly installed on the first fixing plate 21. The first fixing plate 21 and the second fixing plate 22 can move back and forth along the slide groove 8, so as to adjust the relative position between the angular displacement sensor 3 according to the output shaft length of the electric actuator 9 to be tested, so as to better test the angular stroke error of the electric actuator 9 to be tested.

[0023] Furthermore, a locking bolt (not shown in the drawings) is provided at the bottom of the base 1 .

[0024] In this embodiment, a locking bolt (not shown in the drawings) is installed at the bottom of the base 1. After the relative position between the electric actuator 9 to be tested and the angular displacement sensor 3 is adjusted and connected through the coupling 4, the first fixing plate 21 and the second fixing plate 22 can be locked and fixed by tightening the locking bolt to prevent the first fixing plate 21 and the second fixing plate 22 from shaking during the test and affecting the test accuracy.

[0025] Furthermore, the coupling 4 is an elastic coupling.

[0026] The coupling 4 in this embodiment adopts an elastic coupling, so that the motor shaft of the tested electric actuator 9 and the output shaft of the angular displacement sensor 3 can rotate more synchronously, and the accuracy of the angular displacement error test of the electric actuator 9 is further improved.

[0027] Furthermore, the power supply 5 adopts a standard source of model Fluke 5550A, the process calibrator 6 adopts a model ConST326 with an accuracy level of 0.015% RD+0.005% FS, and the angular displacement sensor 3 adopts an MCJS series angle sensor.

[0028] Since the accuracy range of the electric actuator 9 is generally between 0.1% and 1%, the error test should adopt a power supply 5 with a higher accuracy level. The power supply 5 in this embodiment adopts a standard source of model Fluke 5550A, and its highest accuracy level is 93μV / V, so as to reduce the impact of changes in the power supply 5 on the test results and further improve the accuracy of the test. The process calibrator 6 adopts the Const326 model with an accuracy level of 0.015% RD+0.005% FS, and the angular displacement sensor 3 adopts the MCJS series angle sensor produced by Tianyu Hengchuang. By improving the measurement accuracy of the process calibrator 6 and the angular displacement sensor 3 itself, the accuracy of the test of this device is once again improved.

[0029] During the test, the electric actuator 9 to be tested is first mounted on the first fixing plate 21, and then the first fixing plate 21 and the second fixing plate 22 are slid according to the length of the output shaft of the electric actuator 9 to adjust the relative position of the electric actuator 9 to be tested and the angular displacement sensor 3. After the adjustment is completed, the output shaft of the electric actuator 9 and the output shaft of the angular displacement sensor 3 are connected through the elastic coupling 4, and then the locking bolts are tightened to lock and fix the first fixing plate 21 and the second fixing plate 22, and the power supply 5 and the power supply end of the electric actuator 9 to be tested, as well as the output end of the process calibrator 6 and the signal input end of the electric actuator 9 to be tested are connected through the connecting wire. The post-operation process calibrator 6 provides current signals equivalent to 0%, 25%, 50%, 75%, and 100% of the stroke respectively (for the switch-type electric actuator 9, only the current signals of 0% and 100% of the stroke need to be provided). The output shaft of the electric actuator 9 rotates the corresponding angle and drives the angular displacement sensor 3 to rotate synchronously through the elastic coupling 4. The angular displacement sensor 3 will output the corresponding current signal. The digital display 7 connected thereto converts the current signal into an angle value and displays it on the screen. The corresponding display value on the digital display 7 is recorded. According to the above parameters, the error parameters such as the basic error, hysteresis, and dead zone of the electric actuator 9 can be calculated.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An angular travel error test device for an electric actuator, characterized in that: The invention comprises a base (1), a fixing member (2), an angular displacement sensor (3), a coupling (4), a power supply (5), a process calibrator (6) and a digital display (7), wherein the fixing member (2) is arranged on the base (1), the angular displacement sensor (3) is arranged on the fixing member (2) and is used for testing the angular displacement error of the electric actuator, the coupling (4) is arranged on the angular displacement sensor (3) and is used for connecting the angular displacement sensor and the electric actuator, the power supply (5) is arranged on one side of the base (1), the power supply (5) is connected to the power supply end of the electric actuator to be tested, the process calibrator (6) is arranged on one side of the power supply (5), the output end of the process calibrator (6) is connected to the signal input end of the electric actuator to be tested, and the digital display (7) is arranged on one side of the process calibrator (6), and the digital display (7) is connected to the signal line of the angular displacement sensor (3).

2. The angular travel error testing device for an electric actuator according to claim 1, characterized in that: The upper surface of the base (1) is symmetrically provided with two slide grooves (8); the fixing member (2) comprises a first fixing plate (21) and a second fixing plate (22); the first fixing plate (21) and the second fixing plate (22) are both arranged in the two slide grooves (8); the first fixing plate (21) is used for fixing the electric actuator to be tested; and the angular displacement sensor (3) is arranged on the second fixing plate (22).

3. The angular travel error testing device for an electric actuator according to claim 2, characterized in that: A locking bolt is provided at the bottom of the base (1).

4. The angular travel error testing device for an electric actuator according to claim 1, characterized in that: The coupling (4) is an elastic coupling.

5. The angular travel error testing device for an electric actuator according to claim 1, characterized in that: The power supply (5) adopts a standard source of model Fluke 5550A, the process calibrator (6) adopts a model ConST326 with an accuracy level of 0.015% RD+0.005% FS, and the angular displacement sensor (3) adopts an MCJS series angle sensor.

Images