A fixture for instability detection sensor calibration

Abstract

The utility model provides a kind of for instability detection sensor calibration's fixed tool, the fixed tool includes: fixed base, fixed frame and clamping mechanism, wherein, fixed base lower part is fixed on detection equipment by fixing part, and the acceleration applied by transmission detection equipment is passed through.Fixed frame is connected fixed with the top of fixed base, and fixed frame can be relatively angular rotation relative to fixed base.Clamping mechanism is fixedly arranged in one end of fixed frame, for being cooperated with the other end of fixed frame and clamping sensor.The fixed tool can be accelerated calibration in two directions to sensor under the premise of not re-disassembling and installing fixed sensor, and the design of electric clamping structure, sensor can be fixed clamping very conveniently, greatly improve the efficiency of sensor calibration.

Description

Technical Field

[0001] This utility model relates to the field of a fixed fixture for calibrating an instability detection sensor. Background Technology

[0002] Instability detection sensors are essential monitoring devices for train operation. Their main function is to monitor the stability of the vehicle in real time. Sensors detect the lateral, vertical, and longitudinal accelerations of the car body, thereby acquiring the real-time status of components such as bogie wheelsets, air springs, and the car body, and transmitting this information as electrical signals to the instability detection system's main unit. The vehicle reliability evaluation of this system refers to the requirements for car body vibration acceleration in GB5599-85 "Railway Vehicle Dynamic Performance Evaluation and Test Appraisal Specification". To ensure the accuracy and reliability of the values ​​provided by the instability sensors, they need to be calibrated periodically. During calibration, the calibration platform applies the same vertical force to both the sensor under test fixed on the calibration platform and the standard accelerometer built into the calibration platform using a vertical exciter. The difference between the signals from the standard sensor and the sensor under test is compared using a dynamic signal analyzer to calibrate the sensor under test.

[0003] In existing calibration processes, the instability detection sensor is typically fixed to the testing equipment for unidirectional acceleration measurement. When the next test is required, the instability detection sensor must be removed and re-fixed. This significantly prolongs the testing time and reduces efficiency. Furthermore, controlling the tightening pressure applied to the instability detection sensor during fixation is difficult and carries a risk of damaging the sensor. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fixture for calibrating an instability detection sensor, so as to solve the problems of cumbersome sensor fixing, low efficiency and easy damage to the sensor in the prior art.

[0005] This utility model provides a fixture for calibrating an instability detection sensor. The fixture includes a fixed base, a fixed frame, and a clamping mechanism. The lower part of the fixed base is fixed to the detection equipment by a fastener to transmit the acceleration applied by the detection equipment. The fixed frame is connected and fixed to the top end of the fixed base, and the fixed frame can rotate relative to the fixed base at a relative angle. The clamping mechanism is fixedly disposed at one end of the fixed frame and is used to cooperate with the other end of the fixed frame to clamp the sensor.

[0006] Furthermore, the fixing frame includes a fixing beam and fixing plates and clamping plates respectively vertically fixed to both ends of the fixing beam; the clamping mechanism is fixedly disposed on the fixing plate and disposed opposite to the clamping plate; the top side wall of the fixing base has a connecting hole and a plurality of evenly arranged limiting holes; the side wall of the fixing beam has a shaft hole corresponding to the connecting hole, and a rotating shaft passes through and connects the connecting hole and the shaft hole; the side wall of the fixing beam has a limiting hole corresponding to the limiting hole of the side wall of the fixing base, and limiting pins are inserted to limit the angle between the majority of the fixing bases and the fixing beam.

[0007] Furthermore, the limiting holes on the top sidewall of the fixed base are equidistantly distributed in the vertical and horizontal directions of the connecting hole.

[0008] In this embodiment of the invention, the clamping mechanism includes a drive module, a drive rod, and a pressure plate. The drive module is fixedly mounted on the fixed plate and drives the drive rod to extend and retract. The pressure plate is fixedly mounted at the end of the drive rod, and the pressure plate cooperates with the clamping plate to clamp the sensor.

[0009] In this embodiment of the invention, the fixing plate has a through hole perpendicular to the clamping plate, the driving module is fixedly disposed on the side of the fixing plate away from the clamping plate, and the driving rod passes through the through hole.

[0010] In the embodiments of this utility model, the side of the clamping plate opposite to the pressure plate is the clamping surface, and the clamping surface is provided with a flexible pad.

[0011] In embodiments of this utility model, a pressure sensor for detecting clamping pressure is provided on the clamping surface of the clamping plate and / or the pressure plate.

[0012] Furthermore, the clamping mechanism also has a control module, and the pressure sensor circuit is connected to the control module to transmit the pressure signal in real time.

[0013] As can be seen from the above embodiments, the fixture for calibrating an instability detection sensor provided by this utility model has at least the following advantages: after fixing the sensor, the fixture can perform acceleration calibration in two directions without disassembling and reinstalling the sensor. Moreover, the design of the electric clamping structure can easily fix and clamp the sensor, greatly improving the efficiency of sensor detection.

[0014] In addition, while fixing the sensor, it also protects the sensor by limiting the clamping force, which prevents damage to the sensor due to the clamping force. Furthermore, the rubber pad at the clamping connection effectively protects the sensor surface, preventing wear or slippage during testing.

[0015] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0016] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of this utility model.

[0017] Figure 1 This is a schematic diagram of the state of a fixture for calibrating an instability detection sensor provided by this utility model.

[0018] Figure 2 This is a schematic diagram of the second state structure of a fixture for calibrating an instability detection sensor provided by this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-Fixed base, 2-Fixed frame, 3-Clamping mechanism, 4-Flexible pad, 5-Pressure sensor;

[0021] 21-Fixed beam, 22-Fixed plate, 23-Clamping plate;

[0022] 31-Drive module, 32-Push rod, 33-Pressure plate. Detailed Implementation

[0023] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and implementations of the present invention.

[0024] Various improvements and variations can be made to the specific embodiments described in this utility model without departing from the scope or spirit of this utility model, which will be obvious to those skilled in the art. Other embodiments derived from this utility model description will also be obvious to those skilled in the art. This application specification and embodiments are merely exemplary.

[0025] This invention provides a fixture for calibrating an instability detection sensor, such as... Figure 1 and 2 The diagram shows the structure of the fixture in different usage states. In a specific embodiment, the fixture includes: a fixed base 1, a fixing frame 2, and a clamping mechanism 3. The lower part of the fixed base 1 is fixed to the testing equipment by fasteners, transmitting the acceleration applied by the testing equipment. Specifically, the bottom of the fixed base 1 has bolt holes corresponding to the position of the testing equipment, and the fixed base 1 is fixed to the testing equipment by fixing bolts.

[0026] The top of the fixed frame 2 is connected and fixed to the fixed base 1, and the fixed frame 2 can rotate relative to the fixed base 1 at a relative angle. When it is rotated to a suitable angle, it can be locked and fixed.

[0027] The clamping mechanism 3 is fixedly installed at one end of the fixed frame 2 and is used to cooperate with the other end of the fixed frame 2 to clamp the sensor.

[0028] Specifically, depending on the application and requirements of the instability detection sensor, it is necessary to calibrate the acceleration in the vertical, lateral, and longitudinal directions. For example... Figure 1 The state shown is used to measure acceleration in the vertical direction; Figure 2 The state shown is used to measure acceleration in the lateral direction; then... Figure 2 In the indicated state, the sensor is rotated 90 degrees in the direction of the clamping force to measure the acceleration in the longitudinal direction.

[0029] In a specific embodiment of this utility model, the fixing frame 2 includes a fixing beam 21 and fixing plates 22 and clamping plates 23 that are respectively vertically fixed to both ends of the fixing beam 21. The clamping mechanism 3 is fixedly mounted on the fixing plate 22 and is positioned opposite to the clamping plate 23, facilitating the clamping of the sensor together with the clamping plate 23.

[0030] The top sidewall of the fixed base 1 has a connecting hole and a plurality of evenly arranged limiting holes. The limiting holes on the top sidewall of the fixed base 1 are located in the vertical and horizontal directions of the connecting hole, and are evenly distributed.

[0031] The side wall of the fixed beam 21 has a shaft hole corresponding to the connecting hole. The fixed beam can rotate relative to the fixed base 1 by passing through the connecting hole and the shaft hole with a rotating shaft.

[0032] The side wall of the fixed beam 21 has a limiting hole corresponding to the limiting hole on the side wall of the fixed base 1. The fixed base 1 and the fixed beam 21 are angularly limited by inserting a limiting pin. In this embodiment, the rotation angle of the fixed beam 21 is a multiple of 90 degrees to ensure that the sensor is calibrated vertically, laterally, or longitudinally.

[0033] In a specific embodiment of this utility model, the clamping mechanism 3 includes a drive module 31, a drive rod 32, and a pressure plate 33. The drive module 31 is fixedly mounted on the fixed plate 22, driving the drive rod 32 to extend and retract. A pressure plate 33 is fixedly mounted at the end of the drive rod 32, and the pressure plate 33 cooperates with the clamping plate 23 to clamp the sensor. Specifically, the drive module 31 drives the drive rod 32 to extend and retract, and the drive rod 32 drives the pressure plate 33 to move. When the drive rod 32 extends, the pressure plate 33 moves towards the clamping plate 23, thereby achieving the purpose of clamping the sensor.

[0034] Furthermore, the fixing plate 22 has a through hole perpendicular to the clamping plate 23, the drive module 31 is fixedly disposed on the side of the fixing plate 22 away from the clamping plate 23, and the drive rod 32 passes through the through hole.

[0035] In a specific embodiment of this utility model, the side of the clamping plate 23 opposite to the pressure plate 33 is the clamping surface, and a flexible pad 4 is provided on each clamping surface. In this embodiment, the flexible pad 4 is an elastic rubber pad, which can protect the sensor and prevent the clamping surface from damaging the sensor. In addition, it also has an anti-slip effect, which can prevent the sensor from relative displacement or falling off the fixture during calibration and testing.

[0036] In a specific embodiment of this utility model, a pressure sensor 5 for detecting clamping pressure is provided on the clamping surface of the clamping plate 23 and / or the pressure plate 33, for detecting the clamping pressure on the clamping surface of the sensor.

[0037] Furthermore, the clamping mechanism 3 also has a control module, and the pressure sensor 5 is circuitically connected to the control module to transmit pressure signals in real time. In this embodiment, the control module is equipped with a clamping pressure threshold. When the clamping pressure reaches the threshold, the control module will control the drive module 31 to stop clamping, thereby achieving the purpose of protecting the sensor.

[0038] The above description is merely an illustrative embodiment of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A fixture for calibrating an instability detection sensor, characterized in that, The fixture includes: a fixed base (1), a fixed frame (2), and a clamping mechanism (3), wherein, The lower part of the fixed base (1) is fixed to the detection equipment by a fastener, and transmits the acceleration applied by the detection equipment; The fixing frame (2) is connected and fixed to the top of the fixing base (1), and the fixing frame (2) can rotate relative to the fixing base (1). The clamping mechanism (3) is fixedly installed at one end of the fixed frame (2) and is used to cooperate with the other end of the fixed frame (2) to clamp the sensor.

2. The fixture for calibrating an instability detection sensor according to claim 1, characterized in that, The fixing frame (2) includes a fixing beam (21) and fixing plates (22) and clamping plates (23) that are respectively vertically fixed to both ends of the fixing beam (21); The clamping mechanism (3) is fixedly mounted on the fixed plate (22) and is positioned opposite to the clamping plate (23); The top side wall of the fixed base (1) has a connecting hole and a plurality of evenly arranged limiting holes. The side wall of the fixed beam (21) has a shaft hole corresponding to the connecting hole. The connecting hole and the shaft hole are connected through a rotating shaft. The side wall of the fixed beam (21) has a limiting hole corresponding to the limiting hole of the side wall of the fixed base (1), and the angle of the fixed base (1) and the fixed beam (21) is limited by inserting a limiting pin.

3. The fixture for calibrating an instability detection sensor according to claim 2, characterized in that, The limiting holes on the top sidewall of the fixed base (1) are equidistantly distributed in the vertical and horizontal directions of the connecting hole.

4. The fixture for calibrating an instability detection sensor according to claim 2, characterized in that, The clamping mechanism (3) includes a drive module (31), a drive rod (32), and a pressure plate (33), wherein, The drive module (31) is fixedly mounted on the fixed plate (22) to drive the drive rod (32) to extend and retract. The end of the drive rod (32) is fixedly mounted with the pressure plate (33), and the pressure plate (33) cooperates with the clamping plate (23) to clamp the sensor.

5. The fixture for calibrating an instability detection sensor according to claim 4, characterized in that, The fixing plate (22) has a through hole perpendicular to the clamping plate (23), the drive module (31) is fixedly disposed on the side of the fixing plate (22) away from the clamping plate (23), and the drive rod (32) passes through the through hole.

6. The fixture for calibrating an instability detection sensor according to claim 4, characterized in that, The side of the clamping plate (23) opposite to the pressure plate (33) is the clamping surface, and each clamping surface is provided with a flexible pad (4).

7. The fixture for calibrating an instability detection sensor according to claim 4 or 6, characterized in that, Pressure sensors (5) for detecting clamping pressure are provided on the clamping surfaces of the clamping plate (23) and / or the pressure plate (33).

8. The fixture for calibrating an instability detection sensor according to claim 7, characterized in that, The clamping mechanism (3) also has a control module, and the pressure sensor (5) is connected to the control module to transmit pressure signals in real time.

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