Sensor performance test platform

Abstract

The utility model provides a sensor performance test platform. The sensor performance test platform comprises a base; the sensing unit comprises a sensing piece, a driving piece in transmission connection with the sensing piece, and a fixing plate arranged on the base and used for fixing the sensing piece and the driving piece; the sensor support is fixed on the base and is arranged opposite to the sensing piece, and a plurality of mounting holes for mounting sensors are formed in the sensor support; the control unit is connected with the driving piece and used for driving the sensing piece to rotate in the axis direction; wherein the induction part is alternately provided with a plurality of induction areas and non-induction areas along the circumferential direction, and the surface of each induction area is provided with an induction conductor capable of triggering the sensor to generate electromagnetic induction, so that the accuracy and effectiveness of the performance test result of the sensor can be further improved, and the high-precision and convenient test requirements are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sensor testing, and particularly relates to a sensor performance testing platform. BACKGROUND

[0002] At present, in the fields of industrial automation and intelligent detection, proximity sensors are widely used because they can perform non-contact detection. In actual use, the switching frequency accuracy of the proximity sensor plays a key role in its working stability and reliability, and accurate testing of the switching frequency is an important link to ensure the performance of the sensor.

[0003] However, the test devices for proximity sensors on the market generally have the problem of single function, and it is difficult to simultaneously adapt to diversified application scenarios and the test requirements of different types of proximity sensors. Some test devices have the defect of insufficient test precision due to design principles or structural limitations. Some devices have complex operation processes and require professional personnel to debug and set parameters, which increases the use cost and time cost, and it is difficult to meet the actual needs of high-precision and convenient testing. CONTENT OF THE INVENTION

[0004] The application provides a sensor performance testing platform, which can improve the accuracy and effectiveness of the sensor performance test results and meet the needs of high-precision and convenient testing.

[0005] In order to solve the above technical problems, the application provides a sensor performance testing platform, which comprises:

[0006] a base;

[0007] a sensing unit comprising a sensing piece, a driving piece in transmission connection with the sensing piece, and a fixing plate arranged on the base for fixing the sensing piece and the driving piece;

[0008] a sensor support fixed on the base and arranged opposite to the sensing piece, the sensor support being provided with a plurality of mounting holes for mounting sensors;

[0009] a control unit connected with the driving piece and used for driving the sensing piece to rotate along the axial direction;

[0010] The sensing piece is alternately provided with a plurality of sensing areas and non-sensing areas in the circumferential direction, and the surface of the sensing area is provided with a sensing conductor capable of triggering the sensor to generate electromagnetic induction.

[0011] As a further improvement of the application, the sensing piece is a sensing disc, and the sensing areas and the non-sensing areas are alternately distributed in the circumferential direction of the sensing disc.

[0012] As a further improvement of this application, the central angles corresponding to several sensing areas are equal, and the central angles corresponding to several non-sensing areas are equal.

[0013] As a further improvement of this application, the mounting hole is not coaxial with the center of the sensing disk. The mounting hole is used to fix the sensor to the outer periphery of the sensing disk so that the sensing area can sequentially trigger the sensor to generate electromagnetic induction when rotating.

[0014] As a further improvement of this application, the sensor bracket includes at least two mounting side plates, each of which has a plurality of mounting holes along the height direction, and the inner diameters of the plurality of mounting holes are not equal.

[0015] As a further improvement of this application, the driving component is a drive motor, and the output shaft of the drive motor passes through the center of the fixed plate and the induction disk in sequence.

[0016] As a further improvement of this application, the base is also provided with a surrounding plate for fixing the fixing plate, and the side width of the surrounding plate at least covers the side width of the fixing plate and the sensing disk.

[0017] As a further improvement of this application, the control unit includes a controller and a speed regulator connected to the drive component, the controller being used to adjust the rotational speed of the sensor via the speed regulator.

[0018] As a further improvement of this application, the control unit also includes a counter connected to the sensor to collect the number of times the sensor is triggered.

[0019] As a further improvement of this application, the inductive conductor is at least one of copper, aluminum, iron, ferrite, and neodymium iron boron permanent magnets.

[0020] The sensor performance testing platform provided in this application has the following beneficial effects:

[0021] This application features several mounting holes on the sensor bracket, enabling it to accommodate sensors of different types or specifications, thus enhancing the versatility of the testing device. A driving component controls the rotation of the sensing element along its axis. The circumferentially alternating sensing and non-sensing areas of the sensing element pass sequentially through the sensor. The inductive conductor in the sensing area triggers the sensor to generate an electromagnetic induction signal, thereby simulating the actual working condition of a target object periodically approaching and moving away from the sensor. This facilitates accurate testing of the sensor's core performance parameters such as switching frequency and response sensitivity, improving the accuracy and effectiveness of sensor performance testing results and meeting the requirements for high precision and convenient testing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the sensor performance testing platform provided in the embodiments of this application;

[0024] Figure 2 A three-dimensional exploded view of the sensor performance testing platform provided in the embodiments of this application;

[0025] Figure 3 A side view of the sensor performance testing platform provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of the sensing element in the sensor performance testing platform provided in the embodiments of this application;

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Base; 11-Enclosure;

[0029] 20 - Sensing unit; 21 - Sensing element; 211 - Sensing area; 212 - Non-sensing area; 22 - Driving element; 221 - Output shaft; 23 - Fixing plate;

[0030] 30 - Sensor bracket; 31 - Mounting side plate; 32 - Mounting hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0032] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0033] To make the description of this disclosure more detailed and complete, illustrative descriptions of the implementation methods and specific embodiments of this application are provided below; however, this is not the only form of implementing or utilizing the specific embodiments of this application. The implementation methods cover the features of multiple specific embodiments and the method steps and their order for constructing and operating these specific embodiments. However, other specific embodiments may also be used to achieve the same or equivalent functions and step sequences.

[0034] Currently, proximity sensors are widely used in industrial automation, intelligent detection, and other fields due to their ability to perform non-contact detection. In practical applications, the accuracy of the switching frequency of a proximity sensor plays a crucial role in its operational stability and reliability; therefore, accurately testing the switching frequency is an important step in ensuring sensor performance.

[0035] However, current testing devices for proximity sensors generally suffer from limited functionality, making it difficult to adapt to diverse application scenarios and the testing needs of different types of proximity sensors. Some testing devices also suffer from insufficient testing accuracy due to design principles or structural limitations. Furthermore, some devices have complex operating procedures, requiring professional personnel for debugging and parameter setting, which increases usage costs and time costs, making it difficult to meet the actual needs for high-precision and convenient testing.

[0036] In view of this, please refer to Figures 1-4 This application provides a sensor performance testing platform that can improve the accuracy and effectiveness of sensor performance test results and meet the requirements of high precision and convenient testing. The sensor performance testing platform includes a base 10, a sensing unit 20, a sensor bracket 30, and a control unit.

[0037] As an optional implementation method, please refer to Figure 1 This is a schematic diagram of the sensor performance testing platform provided in this application embodiment. The sensing unit 20 includes a sensing element 21, a driving element 22 that is drively connected to the sensing element 21, and a fixing plate 23 disposed on the base 10 for fixing the sensing element 21 and the driving element 22. In this application, the driving element 22 and the sensing element 21 are disposed on opposite sides of the fixing plate 23. The fixing plate 23 fixes the driving element 22 and the sensing element 21 in position, avoiding radial runout and axial movement of the sensing element 21 during rotation, and avoiding test errors caused by mechanical vibration.

[0038] Furthermore, the aforementioned sensor bracket 30 is also fixedly mounted on the base 10, and the sensor bracket 30 is provided with several mounting holes 32 for mounting sensors, thereby enabling rapid installation and positioning of proximity sensors of different types and sizes. In actual testing, the sensor can be directly installed in the mounting hole 32, with the sensor and the side of the sensing element 21 with the sensing conductor facing each other. The control unit and the drive unit 22 are connected via wired or wireless means, thereby driving the sensing element 21 to rotate along the axial direction.

[0039] In the embodiments of this application, please refer to Figure 4 This is a schematic diagram of the structure of the sensing element 21 in the sensor performance testing platform provided in this application embodiment. It can be observed that the sensing element 21 has several sensing areas 211 and non-sensing areas 212 alternately arranged along its circumference. In this application, an inductive conductor that can trigger the sensor to generate electromagnetic induction is provided on the surface of the sensing area 211. Thus, when the control unit controls the driving element 22 to further control the sensing element 21 to rotate along the axis, the sensing areas 211 and non-sensing areas 212 that are alternately distributed around the circumference of the sensing element 21 will pass through the surface of the sensor in sequence.

[0040] Specifically, when the sensing conductor of sensing area 211 approaches the proximity sensor, it triggers the proximity sensor to generate electromagnetic induction. However, since the surface of non-sensing area 212 is not covered by a sensing conductor, it does not trigger the proximity sensor to generate electromagnetic induction. This causes the proximity sensor to generate periodic on / off signals. Then, based on these on / off signals, the switching frequency, response time, and whether false triggering occurs of the proximity sensor are further determined, thereby testing the core performance parameters of the proximity sensor.

[0041] Preferably, in this application, the sensing element 21 is set in the form of a sensing disk, and the aforementioned sensing area 211 and non-sensing area 212 are alternately arranged in the circumferential direction of the sensing disk. Compared with the irregular shape of the sensing element 21, the disc structure of the sensing element 21 can ensure the circumferential uniformity of the sensing area 211 and avoid the problem of inconsistent electromagnetic induction triggered by the proximity sensor due to the deviation of the structure of the sensing element 21.

[0042] It is understood that the central angles corresponding to the several sensing areas 211 provided in this application are equal, and the central angles corresponding to the several non-sensing areas 212 are equal, thereby ensuring that the sensing element 21 periodically triggers the proximity sensor to generate electromagnetic induction during the rotation process.

[0043] Preferably, the central angle corresponding to a single sensing area 211 can be set to be greater than the central angle corresponding to a non-sensing area 212. This application does not impose too many restrictions on the specific central angles corresponding to a single sensing area 211 and a non-sensing area 212.

[0044] For further details, please refer to... Figure 3 This is a side view of the sensor performance testing platform provided in this application embodiment. In this application, the mounting hole 32 is not coaxial with the center of the induction disk. Instead, the sensor is fixed on the outer periphery of the induction disk through the mounting hole 32, so that when the induction area 211 rotates, it can sequentially trigger the sensor installed in the mounting hole 32 to generate electromagnetic induction. According to the principle of electromagnetic induction, the change in relative motion speed will enhance the rate of change of magnetic flux. Therefore, by installing the sensor on the outer periphery of the induction disk, this application can more effectively trigger the sensor to generate electromagnetic induction, thereby improving the sensor's sensing sensitivity and signal strength.

[0045] For example, the sensor bracket 30 provided in this application includes at least two mounting side plates 31. Each mounting side plate 31 has a plurality of mounting holes 32 along the height direction. The inner diameters of the plurality of mounting holes 32 are not equal, ensuring that the plurality of mounting holes 32 are not coaxial with the center of the sensing disk, thereby adapting to sensors of different sizes and specifications. There is no need to design a separate test device for each sensor, which further improves the compatibility of the test platform and effectively reduces the test cost.

[0046] In one specific embodiment, please refer to Figure 2 This is a three-dimensional exploded view of the sensor performance testing platform provided in the embodiment of this application. In this application, the above-mentioned driving component 22 is set as a driving motor, so that the output shaft 221 of the driving motor passes through the center of the fixed plate 23 and the sensing disk in sequence, and drives the sensing disk to rotate in the axial direction through the driving motor.

[0047] Furthermore, in order to further reinforce the drive unit 22 and the sensing disk, this application also provides a surrounding plate 11 on the base 10. The surrounding plate 11 is set as an "n" shaped structure. The surrounding plate 11 provides a circumferential reinforcement to the outer wall of the fixing plate 23. At the same time, the width of the side plate of the surrounding plate 11 is set to at least cover the side width of the fixing plate 23 and the sensing disk, so as to prevent the fixing plate 23 from shaking or displacing under the action of the drive unit 22, and to prevent the sensing disk from swinging or moving during rotation, thereby ensuring the stability of the sensing unit 20 during the test.

[0048] Preferably, the control unit further includes a controller and a speed regulator connected to the drive unit 22 wirelessly or via a wired connection. The controller is used to adjust the rotational speed of the sensor 21 via the speed regulator. The controller can precisely control the drive unit 22 via the speed regulator, thereby adjusting the rotational speed of the sensor 21, so that the test can be performed under different rotational speed conditions.

[0049] Preferably, the control unit further includes a counter connected to the sensor. The counter can collect the number of times the sensor is triggered, and further calculate parameters such as the sensor's response frequency and detection accuracy based on the number of triggers. By analyzing the number of times the sensor is triggered under different speeds and test conditions, the performance of the sensor under various practical application scenarios can be simulated. The actual number of triggers can also be compared with the theoretical number of triggers to determine whether the sensor has a pulse loss phenomenon. The steps of deriving the specific performance parameters of the sensor from the number of triggers are conventional technical means in the field of signal systems. Therefore, this application will not elaborate on the specific calculation steps in detail, and those skilled in the art should know them.

[0050] It is understood that the above controller can be implemented using common control chips, such as MCU (Micro Controller Unit), FPGA (Field Programmable Gate Array), or PLC (Programmable Logic Controller). The MCU, FPGA, PLC, or other chips and devices with similar control functions listed above can all be used as specific implementations of the controller. This application does not impose too many restrictions on the specific configuration of the controller.

[0051] In an optional implementation, the sensing conductor can be made of at least one material selected from copper, aluminum, iron, ferrite, and neodymium iron boron permanent magnet. Copper and aluminum, as highly conductive metals, can quickly generate eddy currents in the sensing region 211, which is suitable for high-frequency response testing of inductive proximity sensors. Ferromagnetic materials such as iron, ferrite, and neodymium iron boron permanent magnet can effectively enhance the magnetic field strength, meeting the testing requirements of magnetic proximity sensors. At the same time, neodymium iron boron permanent magnet can also simulate strongly magnetic target objects due to its high remanence.

[0052] In addition, metals such as nickel and cobalt, which also have good magnetic or electrical conductivity, as well as novel conductive materials such as graphene and conductive polymers, can also be used as inductive conductors. This application does not impose further restrictions on the specific configuration of the inductive conductor, as long as it can trigger the sensor to generate an electromagnetic induction phenomenon.

[0053] In one specific embodiment, please continue to refer toFigure 4 The center angle of a single sensing area 211 can be set to 60°, and the center angle of a non-sensing area 212 can be set to 30°. Copper plating can be applied to the surface of the sensing area 211. Of course, other settings are also possible, and this application does not limit them.

[0054] The sensor performance testing platform provided in this application has several mounting holes on the sensor bracket to accommodate different types or specifications of sensors, thus improving the versatility of the testing device. A driving component controls the rotation of the sensing element along the axial direction. The circumferentially alternating sensing and non-sensing areas of the sensing element pass through the sensor sequentially. The inductive conductor in the sensing area triggers the sensor to generate an electromagnetic induction signal, thereby simulating the actual working condition of a target object periodically approaching and moving away from the sensor. This facilitates accurate testing of the sensor's core performance parameters such as switching frequency and response sensitivity, improving the accuracy and effectiveness of sensor performance testing results and meeting the requirements for high precision and convenient testing.

[0055] It is understood that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments are merely exemplary implementations used to illustrate the principles of this application; however, this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A sensor performance test platform, characterized by, The application relates to a sensor device, which comprises a base, an induction unit, a sensor support, a control unit and a fixing plate. The induction unit comprises an induction piece, a driving piece in transmission connection with the induction piece and a fixing plate arranged on the base for fixing the induction piece and the driving piece. The sensor support is fixed on the base and arranged opposite to the induction piece, and a plurality of mounting holes for mounting sensors are arranged on the sensor support. The control unit is connected with the driving piece and used for driving the induction piece to rotate along an axial direction. The induction piece is alternately provided with a plurality of induction areas and non-induction areas along a circumferential direction, and the induction area is provided with an induction conductor capable of triggering the sensor to generate electromagnetic induction. The induction piece is an induction disc, and the induction areas and the non-induction areas are alternately distributed along the circumferential direction of the induction disc.

2. The sensor performance test platform of claim 1, wherein, The central angles corresponding to the plurality of induction areas are equal, and the central angles corresponding to the plurality of non-induction areas are equal.

3. The sensor performance test platform of claim 2, wherein, The mounting holes are arranged in different axes with the center of the induction disc, the mounting holes are used for fixing the sensors on the outer circumferential side of the induction disc, so that the induction areas can trigger the sensors to generate electromagnetic induction in sequence when rotating.

4. The sensor performance test platform of claim 2, wherein, The sensor support comprises at least two mounting side plates, a plurality of mounting holes are arranged on each mounting side plate along a height direction, and the inner diameters of the plurality of mounting holes are different.

5. The sensor performance test platform of claim 4, wherein, The driving piece is a driving motor, and an output shaft of the driving motor penetrates the center of the induction disc and the fixing plate in sequence.

6. The sensor performance test platform of claim 2, wherein, The base is further provided with a surrounding plate for fixing the fixing plate, and the side width of the surrounding plate covers the side width of the fixing plate and the induction disc.

7. The sensor performance test platform of claim 2, wherein, The control unit comprises a controller and a speed regulator connected with the driving piece, and the controller is used for adjusting the rotating speed of the induction piece through the speed regulator.

8. The sensor performance test platform of claim 1, wherein, The control unit further comprises a counter connected with the sensor, and the counter is used for collecting the triggering times of the sensor.

9. The sensor performance test platform of claim 1, wherein, The induction conductor is at least one of copper, aluminum, iron, ferrite and neodymium-iron-boron permanent magnet.

10. The sensor performance test platform of any one of claims 1-9, wherein, ​

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