Sensor calibration device of high-voltage switch tester

Abstract

The utility model provides a sensor calibration device for a high-voltage switch tester. The sensor calibration device comprises a base, a synchronous conveyor, a linear grating sensor and an annular grating sensor, a shading shell is arranged on the base, and the shading shell is provided with a first shading cavity and a second shading cavity; the synchronous conveyor is horizontally arranged in the first shading cavity and is connected with a traction seat, one end of one wheel shaft of the synchronous conveyor penetrates into the second shading cavity and is connected with a first detection disc, and the other end of the wheel shaft is connected with a second detection disc; the linear grating sensor is arranged in the first shading cavity to detect the linear displacement of the traction seat; the annular grating sensor is arranged in the second shading cavity to detect the rotation angle of the first detection disc. According to the sensor calibration calibrating device of the high-voltage switch tester, the linear grating sensor and the annular grating sensor can obtain calibration data at the same time, the calibration efficiency of the sensor of the high-voltage switch tester can be improved, and the calibration precision can also be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high pressure switch detection technical field, concretely relates to a kind of sensor calibration and verification device of high pressure switch tester. BACKGROUND

[0002] High pressure switch tester is a kind of instrument to test the mechanical characteristics such as the on-off action time and action speed of high pressure switch.The internal core detection element of high pressure switch tester is linear sensor and rotary sensor, therefore, the detection accuracy of linear sensor and rotary sensor is crucial, and calibration work needs to be carried out in advance when carrying out the mechanical characteristic test of high pressure switch.

[0003] Currently, two independent calibration devices are used for linear sensor and rotary sensor of high pressure switch tester, wherein, linear motor is used to drive its pull rod to move for the calibration of linear sensor of high pressure switch tester, then the displacement detection data of linear sensor is compared and calibrated with the output end position of linear motor;For the calibration of rotary sensor of high pressure switch tester, linear motion of linear motor is converted into rotary motion output, then the rotary output angle is detected by using rotary sensor of high pressure switch tester, finally, the detection data is compared and calibrated with the rotary motion angle converted by linear motion of output end of linear motor.This detection and calibration mode is complex in operation and low in efficiency, and the motion output error of linear motor itself has influence on calibration accuracy, so it is necessary to improve sensor calibration device to improve the calibration efficiency and accuracy of high pressure switch tester. SUMMARY

[0004] The utility model embodiment provides a kind of sensor calibration and verification device of high pressure switch tester, to improve the calibration efficiency and accuracy of sensor of high pressure switch tester.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A sensor calibration and verification device for a high-voltage switch tester is provided, comprising a base, a synchronous conveyor, a linear grating sensor, and a ring grating sensor; a light-shielding housing is provided on the base, the light-shielding housing having a horizontally extending first light-shielding cavity and a second light-shielding cavity located to one side of the first light-shielding cavity; the synchronous conveyor is horizontally arranged within the first light-shielding cavity, a traction seat is connected to the conveyor belt surface of the synchronous conveyor, one end of one axle of the synchronous conveyor passes through the second light-shielding cavity and is connected to a first detection disc, and the other end passes through the first light-shielding cavity and is connected to a... The second detection disk; a linear grating sensor is located inside the first light-shielding cavity and aligned vertically with the conveyor belt surface of the synchronous conveyor, used to detect the linear displacement of the traction seat; an annular grating sensor is located inside the second light-shielding cavity and aligned axially with the first detection disk, used to detect the rotation angle of the first detection disk; wherein, the base is provided with a first bracket and a second bracket; the first bracket is used to fix the linear sensor of the high-voltage switch tester so that the pull rod of the linear sensor passes through the first light-shielding cavity to connect to the traction seat; the second bracket is used to fix the rotation sensor of the high-voltage switch tester so that the sensing end of the rotation sensor is aligned axially with the second detection disk.

[0006] In one possible implementation, the synchronous conveyor includes a first synchronous pulley, a second synchronous pulley, a synchronous belt, and a rotary drive; wherein, the first synchronous pulley is rotatably connected to one end of a first light-shielding cavity; the second synchronous pulley is rotatably connected to the other end of a second light-shielding cavity, one end of the axle of the second synchronous pulley is connected to a first detection disc, and the other end is connected to a second detection disc; the synchronous belt is sleeved on the first and second synchronous pulleys, and a traction seat is connected to the belt surface between the first and second synchronous pulleys; the rotary drive is fixedly connected to a base, and its output end is connected to the first synchronous pulley.

[0007] In some embodiments, the synchronous conveyor further includes a bracket disposed between the upper and lower belt surfaces of the synchronous belt, the bracket being connected to the cavity wall of the first light-shielding cavity for supporting the upper belt surface of the synchronous belt; and a traction seat being connected to the upper belt surface of the synchronous belt.

[0008] For example, the base is provided with a motor bracket, and the rotation drive is a stepper motor fixedly connected to the motor bracket.

[0009] For example, both the first bracket and the second bracket include a vertical plate and a pressure plate; the vertical plate is fixedly connected to the base and extends upward, and the upper end of the vertical plate is provided with a first clamping groove; the pressure plate is pressed and fixed to the upper end of the vertical plate, and the pressure plate has a second clamping groove; the second clamping groove and the first clamping groove are used to cooperate to clamp the linear sensor or the rotary sensor.

[0010] In one possible implementation, one end of the light-shielding housing is provided with a clearance hole suitable for the pull rod to pass through, the clearance hole communicating with the first light-shielding cavity and aligned with the traction seat.

[0011] In some embodiments, the bottom of the base is provided with a plurality of adjusting feet.

[0012] The sensor calibration device also includes a controller, and the linear grating sensor, the ring grating sensor and the synchronous conveyor are electrically connected to the controller.

[0013] The sensor calibration and detection device for the high-voltage switch tester has the advantages that, compared with the prior art, the linear sensor of the high-voltage switch tester is fixed on the first support, the pull rod of the linear sensor is inserted into the first light shielding cavity and connected to the traction seat, the rotary sensor of the high-voltage switch tester is fixed on the second support, the sensing end of the rotary sensor is axially aligned with the second detection disc, then the synchronous conveyor is started and the pull rod is pulled to move linearly through the traction seat, in this process, the traction seat continuously shields different parts of the linear grating sensor, so that the linear grating sensor can obtain the displacement of the traction seat, at the same time, the linear sensor obtains detection data based on the movement displacement of the pull rod, the data of the two are compared to determine whether the detection accuracy of the linear sensor meets the requirements, and calibration basis is provided when the detection error exceeds the range; when the synchronous conveyor is started, the rotary angle of the first detection disc can be detected by the ring grating sensor, at the same time, the rotary angle of the second detection disc can be detected by the rotary sensor of the high-voltage switch tester, then the two are compared to determine whether the detection accuracy of the rotary sensor meets the requirements, and calibration basis is provided for the rotary sensor when the detection error exceeds the range.

[0014] On the basis of the above, not only can the linear sensor and the rotary sensor of the high-voltage switch tester be calibrated and detected synchronously, thereby helping to improve the sensor calibration efficiency, but also the linear grating sensor is located in the first light shielding cavity and the ring grating sensor is located in the second light shielding cavity, so that the influence of external light can be avoided, thereby improving the detection accuracy of the linear grating sensor and the ring grating sensor, and on this basis, the detection target of the linear grating sensor and the linear sensor of the high-voltage switch is the linear motion of the traction seat, and the detection target of the ring grating sensor and the rotary sensor of the high-voltage switch tester is the rotary angle of the same axle of the synchronous conveyor, so that the detection error caused by transmission error can be avoided, thereby improving the sensor calibration accuracy of the high-voltage switch tester. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A perspective structural schematic view of the sensor calibration and detection device for the high-voltage switch tester is provided for the embodiments of the utility model;

[0016] Figure 2 is along Figure 1 A sectional view structure schematic view along line A-A in the middle;

[0017] Figure 3 The internal structure schematic diagram of the sensor calibration and verification device of the high-voltage switch tester provided by the embodiment of the utility model is opened on one side of the light shielding shell.

[0018] In the figure: 10, base; 11, first support; 12, second support; 121, vertical plate; 1211, first clamping groove; 122, pressing plate; 1221, second clamping groove; 13, motor support; 14, adjusting foot; 20, light shielding shell; 21, first light shielding cavity; 22, second light shielding cavity; 23, avoiding hole; 30, synchronous conveyor; 301, first detection disc; 302, second detection disc; 303, traction seat; 31, first synchronous wheel; 32, second synchronous wheel; 33, synchronous belt; 34, rotary driving part; 35, bracket; 40, linear grating sensor; 50, annular grating sensor; 60, controller. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.

[0020] It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or several features. In the description of the present application, the meaning of "a plurality of", "several" is two or more than two, unless otherwise specifically limited.

[0021] Please see Figures 1 to 3The utility model provides a sensor calibration and verification device of high voltage switch tester, which belongs to the technical field of sensor calibration and verification device of high voltage switch tester. The sensor calibration and verification device of high voltage switch tester comprises a base 10, a synchronous conveyor 30, a linear grating sensor 40 and a ring grating sensor 50. The base 10 is provided with a light shielding shell 20. The light shielding shell 20 has a first light shielding cavity 21 extending horizontally and a second light shielding cavity 22 located at the side of one end of the first light shielding cavity 21. The synchronous conveyor 30 is horizontally arranged in the first light shielding cavity 21. The synchronous conveyor 30 is connected with a traction seat 303 on the conveying belt surface. One end of one of the shafts of the synchronous conveyor 30 penetrates into the second light shielding cavity 22 and is connected with a first detection disc 301. The other end of the shaft penetrates out of the first light shielding cavity 21 and is connected with a second detection disc 302. The linear grating sensor 40 is arranged in the first light shielding cavity 21 and is vertically aligned with the conveying belt surface of the synchronous conveyor 30. The linear grating sensor 40 is used for detecting the linear displacement of the traction seat 303. The ring grating sensor 50 is arranged in the second light shielding cavity 22 and is axially aligned with the first detection disc 301. The ring grating sensor 50 is used for detecting the rotation angle of the first detection disc 301. The base 10 is provided with a first support 11 and a second support 12. The first support 11 is used for fixing the linear sensor of the high voltage switch tester so that the pull rod of the linear sensor penetrates into the first light shielding cavity 21 and is connected with the traction seat 303. The second support 12 is used for fixing the rotary sensor of the high voltage switch tester so that the sensing end of the rotary sensor is axially aligned with the second detection disc 302.

[0022] It should be noted that the grating sensor refers to a sensor that measures linear displacement or angular displacement using the grating stripe principle. In this embodiment, the linear grating sensor 40 is used to detect the linear displacement of the traction seat 303, and the ring grating sensor 50 is used to detect the rotation angle of the first detection disc 301. The specific detection method and principle are both prior art and will not be described in detail here. In this embodiment, the linear grating sensor 40 is arranged in the first light shielding cavity 21, and the ring grating sensor 50 is arranged in the second light shielding cavity 22, which can create a light-free and wind-free environment for both, thereby avoiding the influence of external light and airflow fluctuations on the detection accuracy of the grating sensor.

[0023] It should be understood that in this embodiment, the detection target of the linear grating sensor 40 is the traction seat 303. The pull rod of the linear sensor of the high-voltage switch tester is directly connected to the traction seat 303. Therefore, the detection target of the linear sensor is also the traction seat 303. The detection targets of the two are consistent, and there is no intermediate transition. With the detection data of the linear grating sensor 40 as the standard data, the comparison of the detection data of the two can intuitively reflect the detection error of the linear sensor. The detection target of the annular grating sensor 50 is the first detection disk 301, and the detection target of the rotary sensor of the high-voltage switch tester is the second detection disk 302. Since the first detection disk 301 and the second detection disk 302 are respectively connected to the two ends of the same wheel axle of the synchronous conveyor 30, the detection targets of the two are also consistent. On this basis, with the detection data of the annular grating sensor 50 as the standard data, the detection error of the rotary sensor can be intuitively reflected by comparing the detection data of the two.

[0024] It should be explained that during sensor calibration, the maximum travel of the synchronous conveyor 30 is when the traction seat 303 moves from one end of the synchronous conveyor 30 to the other. It is important to avoid the traction seat 303 bending too much, which could cause stress on the pull rod of the linear sensor and damage the linear sensor.

[0025] The sensor calibration and verification device for the high-voltage switch tester provided in this embodiment, compared with the prior art, fixes the linear sensor of the high-voltage switch tester on the first bracket 11, and inserts the pull rod of the linear sensor into the first light-shielding cavity 21 and connects it to the traction seat 303. Then, the rotary sensor of the high-voltage switch tester is fixed on the second bracket 12, so that the sensing end of the rotary sensor is axially aligned with the second detection disk 302. Then, the synchronous conveyor 30 is turned on and the pull rod is pulled by the traction seat 303 to make linear movement. During this process, the traction seat 303 continuously blocks different parts of the linear grating sensor 40, so that the linear grating sensor 40 can... The displacement of the traction seat 303 is obtained, and the linear sensor obtains detection data based on the movement displacement of its own pull rod. By comparing the two data, it can be determined whether the detection accuracy of the linear sensor meets the requirements, and a calibration basis is provided when the detection error exceeds the range. When the synchronous conveyor 30 is turned on, the rotation angle of the first detection disk 301 can also be detected by the annular grating sensor 50, and the rotation sensor of the high voltage switch tester can detect the rotation angle of the second detection disk 302. By comparing the two, it can be determined whether the detection accuracy of the rotation sensor meets the requirements, and a calibration basis is provided for the rotation sensor when the detection error exceeds the range.

[0026] Based on the above, not only can the synchronous calibration and verification of the linear and rotary sensors of the high-voltage switch tester be achieved, thus helping to improve the sensor calibration efficiency; the linear grating sensor 40 is located in the first light-shielding cavity 21 and the annular grating sensor 50 is located in the second light-shielding cavity 22, which can avoid the influence of external light, thereby improving the detection accuracy of the linear grating sensor 40 and the annular grating sensor 50 themselves. On this basis, the detection target of the linear grating sensor 40 and the linear sensor of the high-voltage switch is the linear movement of the traction seat 303, and the detection target of the annular grating sensor 50 and the rotary sensor of the high-voltage switch tester is the same wheel axle rotation angle of the synchronous conveyor 30. Therefore, the detection error caused by transmission error can be avoided, thereby improving the sensor calibration accuracy of the high-voltage switch tester.

[0027] In some embodiments, see Figure 3 The synchronous conveyor 30 includes a first synchronous pulley 31, a second synchronous pulley 32, a synchronous belt 33, and a rotary drive 34. The first synchronous pulley 31 is rotatably connected to one end of the first light-shielding cavity 21. The second synchronous pulley 32 is rotatably connected to the other end of the second light-shielding cavity 22. One end of the axle of the second synchronous pulley 32 is connected to a first detection disc 301, and the other end is connected to a second detection disc 302. The synchronous belt 33 is sleeved on the first synchronous pulley 31 and the second synchronous pulley 32. A traction seat 303 is connected to the belt surface of the synchronous belt 33 located between the first synchronous pulley 31 and the second synchronous pulley 32. The rotary drive 34 is fixedly connected to the base 10, and its output end is connected to the first synchronous pulley 31.

[0028] The rotary drive component 34 can be a servo motor or a stepper motor. Since the detection result is not affected even if the movement of the detected target deviates from the rotation angle output of the rotary drive component 34, a low-cost ordinary motor can also be selected as the rotary drive component 34. The method of establishing a transmission connection between the first synchronous pulley 31 and the second synchronous pulley 32 using the synchronous belt 33 has high motion stability and avoids slippage between the synchronous belt 33 and the synchronous pulley. Thus, the transmission conversion relationship between the synchronous belt 33 and the synchronous pulley can be used to convert, compare and self-check the detection data of the linear grating sensor 40 and the annular grating sensor 50, thereby ensuring that the detection data of the linear grating sensor 40 and the annular grating sensor 50 are normal and accurate, and thus ensuring that the sensor calibration and verification data of the high-voltage switch tester are accurate and reliable.

[0029] It should be noted that you should refer to [link / reference]. Figure 3The synchronous conveyor 30 also includes a bracket 35 disposed between the upper and lower belt surfaces of the synchronous belt 33. The bracket 35 is connected to the cavity wall of the first light-shielding cavity 21 and is used to support the upper belt surface of the synchronous belt 33. The traction seat 303 is connected to the upper belt surface of the synchronous belt 33. By setting the bracket 35, the belt surface portion of the synchronous belt 33 located between the first synchronous pulley 31 and the second synchronous pulley 32 can be supported, thereby preventing the synchronous belt 33 from being suspended and sag, which would affect the straightness of the movement of the traction seat 303, and thus ensuring the calibration and verification accuracy of the linear sensor.

[0030] For some possible implementations, please refer to [link / reference]. Figure 1 The base 10 is equipped with a motor bracket 13, and the rotary drive component 34 is a stepper motor fixedly connected to the motor bracket 13. The stepper motor allows for self-checking by comparing its rotation angle with the detection data of the linear grating sensor 40 and the annular grating sensor 50, thereby ensuring the accuracy of the detection data of both the linear grating sensor 40 and the annular grating sensor 50, and ultimately guaranteeing the accuracy and reliability of the sensor calibration data of the high-voltage switch tester.

[0031] For example, such as Figure 1 and Figure 2 As shown, both the first bracket 11 and the second bracket 12 include a vertical plate 121 and a pressure plate 122. The vertical plate 121 is fixedly connected to the base 10 and extends upward. The upper end of the vertical plate 121 is provided with a first clamping groove 1211. The pressure plate 122 is pressed and fixed to the upper end of the vertical plate 121, and the pressure plate 122 has a second clamping groove 1221. The second clamping groove 1221 and the first clamping groove 1211 are used to cooperate in clamping a linear sensor or a rotary sensor. The first bracket 11 and the second bracket 12 have the same structure but different dimensions. The first bracket 11, through the connection between the pressure plate 122 and the vertical plate 121, allows the first clamping groove 1211 and the second clamping groove 1221 to cooperate in clamping a linear sensor. The second bracket 12, through the connection between the pressure plate 122 and the vertical plate 121, allows the first clamping groove 1211 and the second clamping groove 1221 to cooperate in clamping a rotary sensor. This allows the linear sensor and the rotary sensor to be fixed together at the corresponding positions on the base 10 for calibration and verification, thereby improving calibration efficiency.

[0032] It should be understood that, in this embodiment, see Figure 3 One end of the light-shielding housing 20 is provided with a clearance hole 23 suitable for the pull rod to pass through. The clearance hole 23 is connected to the first light-shielding cavity 21 and aligned with the traction seat 303. After the linear sensor is fixed to the first bracket 11, its pull rod passes through the clearance hole 23 and is connected to the traction seat 303, thereby avoiding motion interference between the pull rod and the light-shielding housing 20.

[0033] To improve the stability of the base 10 and its adaptability to the placement environment, such as Figure 1As shown, the bottom of the base 10 has several adjustable feet 14 arranged in an array. Specifically, the adjustable feet 14 can be screwed to the base 10 based on a screw structure. By rotating the screw, the support height of the adjustable feet 14 can be adjusted, thereby ensuring the stability of the base 10 in the placement area. Moreover, even when the ground environment around the power facilities is poor, the base 10 can still be placed stably on the ground, thereby improving the convenience of use.

[0034] It should be noted that you should refer to [link / reference]. Figure 1 The aforementioned sensor calibration device also includes a controller 60. The linear grating sensor 40, the annular grating sensor 50, and the synchronous conveyor 30 are all electrically connected to the controller 60. The controller 60 acquires the detection data from the linear grating sensor 40 and the annular grating sensor 50, and simultaneously controls the start, stop, and travel of the synchronous conveyor 30. Furthermore, the controller 60 can be configured with a display screen to display the detection data in real time, facilitating comparison with the detection data from the linear and rotary sensors displayed on the high-voltage switch tester, thus improving the convenience of sensor calibration and verification operations.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sensor calibration and verification device for a high-voltage switch tester, characterized in that, include: A base, on which a light-shielding shell is provided, the light-shielding shell having a horizontally extending first light-shielding cavity and a second light-shielding cavity located on one side of the first light-shielding cavity; A synchronous conveyor is horizontally positioned inside the first light-shielding cavity. A traction seat is connected to the conveyor belt surface of the synchronous conveyor. One end of one axle of the synchronous conveyor passes through the second light-shielding cavity and is connected to a first detection disc, while the other end passes through the first light-shielding cavity and is connected to a second detection disc. A linear grating sensor is disposed in the first light-shielding cavity and aligned vertically with the conveyor belt surface of the synchronous conveyor, for detecting the linear displacement of the traction seat; A ring grating sensor is disposed in the second light-shielding cavity and aligned axially with the first detection disk, and is used to detect the rotation angle of the first detection disk; The base is provided with a first bracket and a second bracket; the first bracket is used to fix the linear sensor of the high voltage switch tester so that the pull rod of the linear sensor passes through the first light-shielding cavity and connects to the traction seat; the second bracket is used to fix the rotary sensor of the high voltage switch tester so that the sensing end of the rotary sensor is axially aligned with the second detection disk.

2. The sensor calibration and verification device for the high-voltage switch tester as described in claim 1, characterized in that, The synchronous conveyor includes: The first synchronous wheel is rotatably connected to one end of the first light-shielding cavity; The second synchronous wheel is rotatably connected to the other end of the second light-shielding cavity. One end of the axle of the second synchronous wheel is connected to the first detection disk, and the other end is connected to the second detection disk. A timing belt is fitted onto the first timing pulley and the second timing pulley, and the traction seat is connected to the belt surface located between the first timing pulley and the second timing pulley. A rotary drive component is fixedly connected to the base, and its output end is connected to the first synchronous wheel.

3. The sensor calibration and verification device for the high-voltage switch tester as described in claim 2, characterized in that, The synchronous conveyor also includes a bracket disposed between the upper and lower belt surfaces of the synchronous belt, the bracket being connected to the cavity wall of the first light-shielding cavity and used to support the upper belt surface of the synchronous belt; the traction seat is connected to the upper belt surface of the synchronous belt.

4. The sensor calibration and verification device for the high-voltage switch tester as described in claim 2, characterized in that, The base is provided with a motor bracket, and the rotary drive component is a stepper motor fixedly connected to the motor bracket.

5. The sensor calibration and verification device for the high-voltage switch tester as described in claim 1, characterized in that, Both the first bracket and the second bracket include an upright plate and a pressure plate; the upright plate is fixedly connected to the base and extends upward, and the upper end of the upright plate is provided with a first clamping groove; the pressure plate is pressed and fixed to the upper end of the upright plate, and the pressure plate has a second clamping groove, the second clamping groove and the first clamping groove are used to cooperate to clamp the linear sensor or the rotary sensor.

6. The sensor calibration and verification device for the high-voltage switch tester as described in claim 1, characterized in that, One end of the light-shielding housing is provided with a clearance hole suitable for the pull rod to pass through. The clearance hole is connected to the first light-shielding cavity and aligned with the traction seat.

7. The sensor calibration and verification device for the high-voltage switch tester as described in claim 1, characterized in that, The base has several adjustable feet arranged in an array at its bottom.

8. The sensor calibration and verification device for the high-voltage switch tester as described in any one of claims 1-7, characterized in that, The sensor calibration device also includes a controller, and the linear grating sensor, the annular grating sensor and the synchronous conveyor are all electrically connected to the controller.

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