Testing device for angular displacement sensor

Abstract

The invention relates to the field of angular displacement sensor detection, in particular to a testing device for an angular displacement sensor, which comprises a power mechanism, a transmission mechanism, a vibration reduction mechanism and a temperature vibration test box, the damping mechanism is provided with a first deformation part and a second deformation part, one part of the transmission mechanism is connected with the second deformation part, and the transmission mechanism is configured to be a movable connecting structure which is in close contact with the second deformation part; the transmission mechanism is movably connected with the second deformation part of the vibration reduction mechanism, so that the rotation kinetic energy applied to the angular displacement sensor cannot be interrupted; kinetic energy of axial vibration can be reduced through displacement of the second deformation part relative to the transmission mechanism, and kinetic energy of radial vibration can be reduced through deformation generated by the first deformation part and the second deformation part. Under the condition that the vibration is reduced, the risk that the power mechanism and the transmission mechanism are damaged due to the vibration is reduced.

Description

Technical Field

[0001] The invention relates to the detection field of angular displacement sensors, in particular to a testing device for angular displacement sensors. Background Art

[0002] As the mechanical transmission systems on aircraft are increasingly replaced by electronic control systems, the application of resolver angular displacement sensors in aircraft systems is becoming more and more widespread.

[0003] Angular displacement sensors usually need to be tested during the development and review process. In the process of testing angular displacement sensors used in aircraft systems, the following two necessary conditions need to be considered: first, the ambient temperature and vibration conditions of the actual aircraft system need to be simulated; second, the effects of temperature and / or vibration on the test instrument need to be avoided.

[0004] The temperature and vibration test chamber is a commonly used test equipment in the testing field, for example: the temperature, humidity and vibration three-in-one test chamber commonly seen on the market; the temperature and vibration test chamber can meet the test process of the angular displacement sensor used in the aircraft system through temperature control and vibration simulation, and needs to simulate the ambient temperature and vibration conditions of the actual aircraft system;

[0005] However, the angular displacement sensor is used to detect angles. When the angular displacement sensor is tested in a temperature vibration test chamber, it is necessary to apply kinetic energy to the angular displacement sensor to generate angles through other experimental equipment. In other words, other experimental equipment used to apply kinetic energy to the angular displacement sensor to generate angles has two settings relative to the temperature vibration test chamber during the experiment: the first setting is to completely set the other experimental equipment inside the temperature vibration test chamber, and the second setting is to set the experimental equipment outside the temperature vibration test chamber.

[0006] Obviously, the first setting method mentioned above is not advisable. When simulating the temperature environment and vibration conditions of the aircraft system, high temperature and vibration will be generated in the temperature vibration test box, such as 200-300 degrees. High temperature and vibration are very easy to damage other experimental equipment. Therefore, a better practical choice is to adopt the second setting method mentioned above and set the experimental equipment outside the temperature vibration test box.

[0007] When the second setting method is adopted, since there is a distance between other experimental equipment and the angular displacement sensor in the temperature vibration test box, and the kinetic energy of the angle needs to be transmitted to the angular displacement sensor through other experimental equipment, the other experimental equipment must be connected to the angular displacement sensor through a transmission mechanism, and at the same time, the transmission mechanism must be inserted from the outside to the inside of the temperature vibration test box; in this setting method, the kinetic energy of the vibration of the temperature vibration test box will still appear, which will be applied to other experimental equipment through the transmission mechanism and cause damage to other experimental equipment.

[0008] Therefore, in the process of testing the angular displacement sensor through the temperature vibration test box, how to reduce the damage caused by the kinetic energy of the vibration of the temperature vibration test box to other experimental equipment becomes a technical problem to be solved. Summary of the invention

[0009] In order to solve the technical problem in the prior art of how to reduce the kinetic energy of vibration of a temperature vibration test box during testing of an angular displacement sensor through the temperature vibration test box to avoid damage to other experimental equipment, the present invention provides a testing device for an angular displacement sensor.

[0010] To achieve the above object, the technical solution adopted by the present invention is:

[0011] According to one aspect of the present invention, there is provided a testing device for an angular displacement sensor, comprising a power mechanism, a transmission mechanism, a vibration reduction mechanism and a temperature vibration test chamber;

[0012] The power mechanism comprises a power component and a control component, wherein the control component is used to set an angle and control the power component to output rotational kinetic energy according to the set angle;

[0013] The transmission mechanism is used to receive the rotational kinetic energy and to transmit the rotational kinetic energy to the vibration reduction mechanism;

[0014] The vibration reduction mechanism is provided with a first deformation part and a second deformation part, a part of the transmission mechanism is connected to the second deformation part, the transmission mechanism is configured as a close contact and movable connection structure relative to the second deformation part, the deformation direction of the second deformation part is along the radial direction of the transmission mechanism, the movable direction of the second deformation part relative to the transmission mechanism is the axial direction of the transmission mechanism, the rotating shaft of the angular displacement sensor is coaxially connected to the first deformation part, and the deformation direction of the first deformation part is the radial direction of the transmission mechanism;

[0015] A temperature component for changing the temperature of the inner cavity and a vibration component for generating vibration are arranged in the inner cavity of the temperature vibration test box, a fixture for mounting the angular displacement sensor is arranged on the vibration component, and the vibration reduction mechanism and the fixture are jointly limited to form a receiving area for receiving the angular displacement sensor.

[0016] Furthermore, the vibration reduction mechanism comprises an elastic clip, a clamping block and a deformable coupling, and the elastic clip is connected to the deformable coupling through the clamping block;

[0017] The elastic clip is provided with a mounting seat, a first deformable sheet and a second deformable sheet, the first deformable sheet and the second deformable sheet are configured to be mirror-symmetrical, and the two are respectively fixedly arranged on the mounting seat, the first deformable sheet and the second deformable sheet are parallel to each other and have a spacing, and the first deformable sheet and the second deformable sheet together constitute the second deformable portion;

[0018] The deformable coupling is provided with a first section, a second section and a third section, the second section is located between the first section and the third section, at least the second section is configured as a cylinder, a surface of the second section is concavely provided with a plurality of deformation grooves, along the circumferential direction of the second section, the circumferential length covered by any two adjacent deformation grooves is less than the sum of the lengths of the two deformation grooves, along the axial direction of the second section, a spacing is formed between any two adjacent deformation grooves, and the plurality of deformation grooves together constitute the first deformation portion;

[0019] The third section of the deformable coupling is used to connect the rotating shaft of the angular displacement sensor.

[0020] Furthermore, a first guide piece is provided extending from one end of the first deformable piece away from the mounting seat;

[0021] A second guide piece is provided extending from one end of the second deformable piece away from the mounting seat;

[0022] Along the direction from the first deformable piece or the second deformable piece to the mounting seat, the first guide piece and the second guide piece are configured in a convergent shape.

[0023] Further, the clamp block includes a first clamping portion, a second clamping portion and a flat plate portion which are integrally formed, wherein the first clamping portion and the second clamping portion are respectively provided with arc-shaped clamping grooves, and the flat plate portion is provided with a connecting through hole;

[0024] The first section is configured as a cylinder, the diameter of the first section is smaller than the diameter of the second section, and the first section is clamped between the two clamping grooves;

[0025] The mounting seat is connected to the connecting through hole by bolts.

[0026] Further, the transmission mechanism comprises a first shaft, a second shaft and a heat-insulating shaft, the heat-insulating shaft is located between the first shaft and the second shaft, and the first shaft and the second shaft are respectively detachably connected to the heat-insulating shaft;

[0027] The heat-insulating shaft is made of engineering plastics, and countersunk holes are respectively provided at both axial ends of the heat-insulating shaft, the first shaft is inserted into one of the countersunk holes, and the second shaft is inserted into the other countersunk hole;

[0028] The first shaft is provided with a cylindrical pin, the axial direction of the cylindrical pin is perpendicular to the axial direction of the first shaft, and the cylindrical pin is configured to be inserted into the first deformation portion;

[0029] The second shaft is connected to the power component.

[0030] Furthermore, it also includes a support frame;

[0031] The support frame is provided with a frame and three support ends, and the three support ends have a moving state and a static state relative to the frame, respectively, wherein the three support ends in the static state are configured to contact the thermal insulation shaft in three directions within the same clamping plane, and the thermal insulation shaft is configured to be able to generate a rotational motion relative to the three support ends when receiving the rotational kinetic energy.

[0032] Furthermore, the frame is configured as a ring with a mounting notch, a mounting area is formed between the inner circumferential surfaces of the frame, and the mounting area is connected to the mounting notch along the radial direction of the frame;

[0033] The three support ends are respectively located in the installation area, and the three support ends are respectively made of polytetrafluoroethylene material. The two ends of any support end are a head end and a tail end respectively, and the head end is configured in a pointed cone or spherical shape, and the head end is used to contact the insulation shaft.

[0034] Furthermore, the power component is specifically a motor, and the control component includes an encoder and a controller, the encoder is coaxially connected to the motor shaft of the motor, and the motor and the encoder are electrically connected to the controller respectively;

[0035] The motor shaft is coaxially connected to the transmission mechanism.

[0036] Furthermore, the temperature vibration test box has a box body, and the temperature component and the vibration component are respectively arranged in the box body;

[0037] The box body is provided with a matching hole for being penetrated by the transmission mechanism, and the connection position of the transmission mechanism and the shock absorbing mechanism is restricted in the box body.

[0038] The above technical solution has the following advantages or beneficial effects:

[0039] The test device for an angular displacement sensor provided by the present invention has the following characteristics: when the power mechanism outputs rotational kinetic energy and the temperature vibration test box generates vibration, the transmission mechanism maintains a movable connection with the second deformation part of the vibration reduction mechanism, and the rotational kinetic energy applied to the angular displacement sensor will not be interrupted; in addition, the kinetic energy of the vibration generated by the temperature vibration test box is applied to the vibration reduction mechanism through the angular displacement sensor, wherein the kinetic energy of the axial vibration can be reduced by the displacement of the second deformation part relative to the transmission mechanism and the conversion of the friction between the second deformation part and the transmission mechanism into heat energy, and wherein the kinetic energy of the radial vibration can be reduced by the deformation of the first deformation part, the deformation of the second deformation part, or the displacement of the second deformation part relative to the transmission mechanism and the conversion of the friction between the second deformation part and the transmission mechanism into heat energy; under the condition that the vibration is reduced, the risk of damage to the power mechanism and the transmission mechanism due to vibration is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of a testing device for an angular displacement sensor provided in an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of the structure of a testing device for an angular displacement sensor provided in an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the structure of an elastic clip provided in an embodiment of the present invention;

[0043] Figure 4 A schematic structural diagram of a deformable coupling provided in an embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the structure of a clamping block provided in an embodiment of the present invention;

[0045] Figure 6 A schematic diagram of the structure of a transmission mechanism provided by an embodiment of the present invention;

[0046] Figure 7 A schematic structural diagram of a support frame provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Embodiment 1:

[0048] In this embodiment, a testing device for an angular displacement sensor is provided to solve the technical problem in the prior art of how to reduce the kinetic energy of vibration of a temperature vibration test box during testing of the angular displacement sensor using a temperature vibration test box to avoid damage to other experimental equipment.

[0049] For details, see Figure 1 or Figure 3 , the testing device for the angular displacement sensor of this embodiment includes a power mechanism 1, a transmission mechanism 2, a vibration reduction mechanism 4 and a temperature vibration test box 7;

[0050] The power mechanism 1 has a power component and a control component, wherein the control component is used to set an angle and control the power component to output rotational kinetic energy according to the set angle;

[0051] The transmission mechanism 2 is used to receive the rotational kinetic energy and to transmit the rotational kinetic energy to the vibration reduction mechanism 4;

[0052] The vibration reduction mechanism 4 is provided with a first deformable portion 41 and a second deformable portion 42, a part of the transmission mechanism 2 is connected to the second deformable portion 42, the transmission mechanism 2 is configured as a closely contacting and movable connection structure relative to the second deformable portion 42, the deformation direction of the second deformable portion 42 is along the radial direction of the transmission mechanism 2, the movable direction of the second deformable portion 42 relative to the transmission mechanism 2 is the axial direction of the transmission mechanism 2, the rotating shaft of the angular displacement sensor is coaxially connected to the first deformable portion 41, and the deformation direction of the first deformable portion 41 is the radial direction of the transmission mechanism 2;

[0053] The inner cavity of the temperature vibration test box 7 is provided with a temperature component (not shown in the figure) for changing the inner cavity temperature and a vibration component 702 for generating vibration. The vibration component 702 is provided with a fixture 703 for installing the angular displacement sensor. The vibration reduction mechanism 4 and the fixture 703 are jointly limited to form a accommodating area for accommodating the angular displacement sensor.

[0054] It should be understood that a part of the aforementioned transmission mechanism 2 should be understood as a structure on the transmission mechanism 2, which is configured to extend radially along the transmission mechanism 2; in the following content, a cylindrical pin is specifically proposed as a part of the transmission mechanism 2, please see the following content.

[0055] In this embodiment, the fixture 703 is used to clamp the angular displacement sensor to be detected. The fixture 703 is provided with a mounting hole according to the angular displacement sensor to be detected. A connection can be formed by passing a bolt through the mounting hole and a positioning hole on the angular displacement sensor.

[0056] The control component of the power mechanism 1 is configured to receive an angle set by a staff member. For ease of description, the angle set by the control personnel is defined as an angle parameter. After receiving the angle parameter, the control mechanism starts the power component to operate, so that the power component generates rotational kinetic energy. The rotation direction and rotation path corresponding to the rotational kinetic energy of the power mechanism 1 are respectively controlled by the angle parameters, so that the rotation direction and rotation path corresponding to the rotational kinetic energy of the power mechanism 1 change direction or terminate when the set angle parameter is reached.

[0057] In this embodiment, the power component is preferably set as a motor, and the control component includes an encoder and a controller, the controller is such as a PLC; the encoder is coaxially connected to the motor shaft of the motor, and the motor and the encoder are electrically connected to the controller respectively; the motor shaft of the motor is coaxially connected to the transmission mechanism 2, wherein the encoder is used to detect the direction and angle of rotation of the motor shaft of the motor.

[0058] Among them, according to the needs of angle control, the motor can specifically adopt a stepper motor, a servo motor, a DC motor, etc. The control methods and output angle accuracy of these motors are common knowledge known to technical personnel in this field and will not be repeated here.

[0059] The staff can input the angle parameters on the controller. After receiving the angle parameters, the controller starts the motor to generate rotational kinetic energy; the actual rotation angle of the motor shaft of the motor is detected by the encoder, wherein the encoder is coaxially connected to the motor shaft; the encoder converts the received rotational kinetic energy of the motor shaft into an angle electrical signal and outputs it to the controller. The controller compares the received angle electrical signal with the angle parameters. If the angle electrical signal meets the angle parameters, the controller terminates the operation of the motor.

[0060] According to the program executed by the controller, the controller can make at least the following two control modes according to the actual test requirements:

[0061] In the first control mode, the controller controls the motor shaft of the motor to rotate according to the angle parameter; after each motor start-up, the state of the kinetic energy output by the motor shaft of the motor changes from 'zero state' to 'greater than zero state' and then to 'zero state'. Correspondingly, the actual rotation path of the motor shaft can be an arc path in the clockwise direction or counterclockwise direction. When the motor stops working, the motor shaft stops rotating; when the motor is started multiple times, a period of time is required after the previous motor stops working, and the motor is started again.

[0062] In the second control method, the controller controls the motor shaft of the motor to rotate according to the angle parameter. If the angle electrical signal meets the angle parameter, the controller terminates the motor and generates a reversal start signal to reverse the motor shaft. When there is a reversal start signal, the motor works again, and the rotation direction of the motor shaft of the motor is opposite to the rotation direction of the previous motor shaft. For example, if the previous motor shaft rotated in a clockwise direction, then after the reversal start signal, the next motor shaft rotates in a counterclockwise direction. The actual rotation path of the motor shaft is a swinging path composed of a clockwise arc path and a counterclockwise arc path. When the motor is terminated, the motor shaft stops rotating. When the motor is started multiple times, a period of time is required after the previous motor is terminated, and the motor is started again according to the reversal start signal.

[0063] It should be understood that in other embodiments, the power component can also be set as a cylinder or a hydraulic device, and the cylinder and the hydraulic device need to cooperate with structures such as gears and racks to realize the conversion of linear motion into rotational motion; correspondingly, the control component needs to adopt a displacement sensor, which detects the displacement data of the piston rod of the cylinder or the hydraulic rod of the hydraulic device through the displacement sensor, and sends the displacement data to the controller. The controller converts the displacement data into the actual rotation angle of the gear, and then compares the actual rotation angle with the angle threshold.

[0064] The rotational kinetic energy of the power mechanism 1 is transmitted to the angular displacement sensor under test in the temperature vibration test box 7 through the transmission mechanism 2 and the vibration reduction mechanism 4, so that the angular displacement sensor can convert the rotational kinetic energy into an angular displacement electrical signal after receiving the rotational kinetic energy;

[0065] The transmission mechanism 2 can be implemented using a commonly used shaft structure. When the aforementioned power component is configured as a motor, the motor shaft of the motor is connected to one end of the shaft through a coupling, and the other end of the shaft is connected to the vibration reduction mechanism 4, and the vibration reduction mechanism 4 is connected to the rotating shaft of the angular displacement sensor.

[0066] In the following description, this embodiment provides a preferred transmission mechanism 2, which will not be mentioned here for the time being.

[0067] In order to facilitate the insertion of the transmission mechanism 2 from the outside to the inside of the temperature vibration test box 7, in this embodiment, the temperature vibration test box 7 has a box body, and the temperature component and the vibration component 702 are respectively arranged in the box body;

[0068] The box body is provided with a matching hole for being penetrated by the transmission mechanism 2, and the connection position of the transmission mechanism 2 and the vibration reduction mechanism 4 is restricted in the box body.

[0069] A matching hole is provided on the box body of the temperature vibration test box 7 so that the transmission mechanism 2 can pass through the matching hole to reach the inside of the box body. This is common knowledge known to those skilled in the art and will not be described in detail here.

[0070] In this embodiment, see Figure 3 , the vibration reduction mechanism 4 is provided with a second deformation part 42; the second deformation part 42 clamps a part of the transmission mechanism 2, so that after the transmission mechanism 2 is connected with the second deformation part 42, the rotational kinetic energy of the transmission mechanism 2 is transmitted to the second deformation part 42 through the transmission mechanism 2, and when the second deformation part 42 receives the rotational kinetic energy and the temperature vibration test box 7 does not generate vibration, the second deformation part 42 remains stationary relative to the transmission mechanism 2 and generates a rotation tendency, and the rotation tendency causes the vibration reduction mechanism 4 as a whole to generate a rotation tendency with the axis of the transmission mechanism 2 as the rotation axis;

[0071] In this embodiment, see Figure 4 The vibration reduction mechanism 4 is provided with a first deformation portion 41; the first deformation portion 41 and the second deformation portion 42 can be manufactured as one piece or can be made of a split structure; the first deformation portion 41 is coaxially connected to the rotating shaft of the angular displacement sensor to be detected, and when the vibration reduction mechanism 4 generates a rotation tendency, the second deformation portion 42 applies rotational kinetic energy to the rotating shaft of the angular displacement sensor, so that the rotating shaft of the angular displacement sensor rotates;

[0072] In this embodiment, from the perspective of the direction of vibration, the vibration generated by the temperature vibration test box 7 along the axial direction of the transmission mechanism 2 can be defined as axial vibration, and the vibration generated by the temperature vibration test box 7 along the radial direction of the transmission mechanism 2 can be defined as radial vibration;

[0073] When the temperature vibration test box 7 generates vibration, the kinetic energy of the vibration is applied to the vibration reduction mechanism 4 through the angular displacement sensor. At this time, most of the kinetic energy of the axial vibration is reduced by the displacement of the second deformation part 42 relative to the transmission mechanism 2, and a small part of the kinetic energy of the axial vibration is reduced by being converted into heat energy through the friction between the second deformation part 42 and the transmission mechanism 2, and most of the kinetic energy of the radial vibration is converted into the stress of the first deformation part 41 by the deformation of the first deformation part 41 along the radial direction of the transmission mechanism 2, and a small part of the kinetic energy of the radial vibration is converted into the stress of the second deformation part 42 by the deformation of the second deformation part 42 along the radial direction of the transmission mechanism 2, or is reduced by the radial displacement of the second deformation part 42 relative to the transmission mechanism 2 and is reduced by being converted into heat energy through the friction between the second deformation part 42 and the transmission mechanism 2;

[0074] By adopting the above technical solution, when the power mechanism 1 outputs rotational kinetic energy and the temperature vibration test box 7 generates vibration, the transmission mechanism 2 maintains a movable connection with the second deformation part 42 of the vibration reduction mechanism 4, and will not interrupt the rotational kinetic energy applied to the angular displacement sensor; in addition, the kinetic energy of the vibration generated by the temperature vibration test box 7 is applied to the vibration reduction mechanism 4 through the angular displacement sensor, wherein the kinetic energy of the axial vibration can be reduced by the displacement of the second deformation part 42 relative to the transmission mechanism 2 and the conversion of the friction between the second deformation part 42 and the transmission mechanism 2 into heat energy, and the kinetic energy of the radial vibration can be reduced by the deformation of the first deformation part 41, the deformation of the second deformation part 42, or the displacement of the second deformation part 42 relative to the transmission mechanism 2 and the conversion of the friction between the second deformation part 42 and the transmission mechanism 2 into heat energy; under the condition that the vibration is reduced, the risk of damage to the power mechanism 1 and the transmission mechanism 2 due to vibration is reduced.

[0075] Therefore, the testing device for the angular displacement sensor of this embodiment solves the technical problem in the prior art of how to reduce the kinetic energy of the vibration of the temperature vibration test box 7 during the testing of the angular displacement sensor by the temperature vibration test box 7 to avoid damage to other experimental equipment.

[0076] For further information, see Figures 1 to 5 The test device for the angular displacement sensor of this embodiment is characterized in that the vibration reduction mechanism 4 includes an elastic clip 411, a clamping block 412 and a deformable coupling 413, and the elastic clip 411 is connected to the deformable coupling 413 through the clamping block 412;

[0077] The elastic clip 411 is provided with a mounting seat 401, a first deformable sheet 402 and a second deformable sheet 403. The first deformable sheet 402 and the second deformable sheet 403 are configured to be mirror-symmetrical and are fixedly arranged on the mounting seat 401 respectively. The first deformable sheet 402 and the second deformable sheet 403 are parallel to each other and have a spacing therebetween. The first deformable sheet 402 and the second deformable sheet 403 together constitute a second deformable portion 42.

[0078] The deformable coupling 413 is provided with a first section A1, a second section A2 and a third section A3, the second section A2 is located between the first section A1 and the third section A3, at least the second section A2 is configured as a cylinder, and a plurality of deformation grooves A4 are provided in a concave manner on the surface of the second section A2, along the circumferential direction of the second section A2, the circumferential length covered by any two adjacent deformation grooves A4 is less than the sum of the lengths of the two deformation grooves A4, along the axial direction of the second section A2, a spacing is formed between any two adjacent deformation grooves A4, and the plurality of deformation grooves A4 together constitute the first deformation portion 41;

[0079] The third section A3 of the deformable coupling 413 is used to connect the rotating shaft of the angular displacement sensor.

[0080] The vibration reduction mechanism 4 in this embodiment is configured as a detachable connection structure, specifically, the elastic clip 411 and the deformable coupling 413 are detachably connected to the clamping block 412 respectively.

[0081] See also Figure 2 or Figure 3 The elastic clip 411 clamps a part of the transmission mechanism 2 by forming a second deformation part 42 through the first deformation piece 402 and the second deformation piece 403, wherein when a part of the transmission mechanism 2 is arranged between the first deformation piece 402 and the second deformation piece 403, the distance between the first deformation piece 402 and the second deformation piece 403 located at the mounting seat 401 remains unchanged or slightly increases, while the distance between the first deformation piece 402 and the second deformation piece 403 away from the mounting seat 401 is significantly increased. In other words, the first deformation piece 402 and the second deformation piece 403 are deformed by being squeezed by a part of the transmission mechanism 2 and are in close contact with the surface of a part of the transmission mechanism 2.

[0082] When the second deformation part 42 receives axial vibration from the temperature vibration test box 7, a part of the transmission mechanism 2 remains relatively still, while the first deformation piece 402 and the second deformation part 42 respectively form axial or radial displacement relative to a part of the transmission mechanism 2, and during the displacement, the kinetic energy of the axial vibration generates heat through friction, or the first deformation piece 402 and / or the second deformation piece 403 generates radial deformation along the transmission mechanism 2 relative to the transmission mechanism 2, thereby reducing the kinetic energy of the axial vibration.

[0083] See also Figure 2 or Figure 4 , the second section A2 of the deformable coupling 413 is provided with a plurality of deformation grooves A4, and any deformation groove A4 is respectively recessed and arranged in the second section A2, wherein, along the axial direction of the deformable coupling 413, there is a spacing between any two deformation grooves A4, and preferably, the length direction of the mouth formed by any two deformation grooves A4 and the surface of the second section A2 is configured to be parallel to each other; along the circumferential direction of the deformable coupling 413, the circumferential length covered by any two adjacent deformation grooves A4 is less than the sum of the lengths of the two deformation grooves A4, which is essentially that the circumferential surface of the second section A2 is divided into a plurality of circumferential segments along the axial direction, and each circumferential segment is only provided with one deformation groove A4, and in any two adjacent circumferential segments, the deformation groove A4 of the first circumferential segment is located at a position in the circumferential direction of the second section A2, which is different from the position of the deformation groove A4 of the second circumferential segment in the circumferential direction;

[0084] In order to facilitate those skilled in the art to understand how to set the position of the deformation groove A4 of this embodiment, the following is a specific description using the quadrant in conjunction with the aforementioned circumferential segment:

[0085] At one end of the second segment A2, a two-dimensional coordinate system is established, wherein the axis of the second segment A2 intersects with the origin of the two-dimensional coordinate system;

[0086] In a two-dimensional coordinate system, four quadrants are formed, which is common knowledge known to those skilled in the art;

[0087] Along the axial direction of the second segment A2, if the deformation grooves A4 of the first circumferential segment are respectively arranged in the first quadrant and the second quadrant, then the deformation grooves A4 of the second circumferential segment are respectively arranged in the second quadrant and the third quadrant, and the deformation grooves A4 of the third circumferential segment are respectively arranged in the third quadrant and the fourth quadrant, and the deformation grooves A4 of the fourth circumferential segment are respectively arranged in the fourth quadrant and the first quadrant;

[0088] Alternatively, along the axial direction of the second segment A2, if the deformation grooves A4 of the first circumferential segment are respectively arranged in the first quadrant, the second quadrant and the third quadrant, then the deformation grooves A4 of the second circumferential segment are respectively arranged in the second quadrant, the third quadrant and the fourth quadrant, and the deformation grooves A4 of the third circumferential segment are respectively arranged in the third quadrant, the fourth quadrant and the first quadrant, and the deformation grooves A4 of the fourth circumferential segment are respectively arranged in the fourth quadrant, the first quadrant and the second quadrant;

[0089] Alternatively, along the axial direction of the second segment A2, if the deformation groove A4 of the first circumferential segment is only arranged in the first quadrant, then the deformation groove A4 of the second circumferential segment is respectively arranged in the first quadrant and the second quadrant, and the deformation groove A4 of the third circumferential segment is only arranged in the second quadrant, and the deformation groove A4 of the fourth circumferential segment is arranged in the second quadrant and the third quadrant, and so on, and a deformation groove A4 is respectively arranged in each quadrant, and a deformation groove A4 is respectively arranged between two adjacent quadrants.

[0090] The purpose of adopting the above-mentioned setting method of the deformation groove A4 is to convert the kinetic energy of radial vibrations in different directions received by the second section A2 into stress of the second section A2 or the deformable coupling 413 through the deformation generated by at least one deformation groove A4, so that the deformable coupling 413 can reduce the radial vibration originating from the temperature vibration test box 7 by deformation through the multiple deformation grooves A4 set in its second section A2.

[0091] For further information, see Figure 3 In the test device for the angular displacement sensor in this embodiment, a first guide piece 404 is provided extending from one end of the first deformable piece 402 away from the mounting seat 401;

[0092] A second guide piece 405 is extended from one end of the second deformation piece 403 away from the mounting seat 401;

[0093] Along the direction from the first deformable piece 402 or the second deformable piece 403 to the mounting seat 401 , the first guide piece 404 and the second guide piece 405 are configured in a convergent shape.

[0094] The purpose of providing the first guide piece 404 and the second guide piece 405 is that before a part of the transmission mechanism 2 is inserted into the first deformable piece 402 and the second deformable piece 403, a convergent guide structure is formed along the direction from the first guide piece 404 to the mounting seat 401 or along the direction from the second guide piece 405 to the mounting seat 401 by the first guide piece 404 and the second guide piece 405, so that a part of the transmission mechanism 2 is first inserted between the first guide piece 404 and the second guide piece 405, and then, as a part of the transmission mechanism 2 continues to move between the first deformable piece 402 and the second deformable piece 403, affected by the convergent guide structure of the first guide piece 404 and the second guide piece 405, the movement path of a part of the transmission mechanism 2 is guided between the first deformable piece 402 and the second deformable piece 403, and then accurately inserted between the first deformable piece 402 and the second deformable piece 403.

[0095] By adopting the above-mentioned manner, it is possible to facilitate the assembly of a part of the guide mechanism with the second deformation portion 42 , thereby improving the assembly efficiency.

[0096] For further information, see Figure 5 In the test device for the angular displacement sensor of this embodiment, the clamp block 412 includes a first clamping portion B1, a second clamping portion B2 and a flat plate portion B3 which are integrally formed, wherein the first clamping portion B1 and the second clamping portion B2 are respectively provided with an arc-shaped clamping groove B4, and the flat plate portion B3 is provided with a connecting through hole;

[0097] The first section A1 is configured as a cylinder, the diameter of the first section A1 is smaller than the diameter of the second section A2, and the first section A1 is clamped between two clamping grooves B4;

[0098] The mounting seat 401 is connected to the connecting through hole by bolts.

[0099] The first clamping part B1 and the second clamping part B2 form a clamping structure, one end of the first clamping part B1 is fixedly connected to one end of the second clamping part B2, a gap is formed between the rest of the first clamping part B1 and the rest of the second clamping part B2, the arc-shaped clamping groove B4 on the first clamping part B1 and the arc-shaped clamping groove B4 of the second clamping part B2 are arranged face to face, so that the two arc-shaped clamping grooves B4 can clamp the first section A1 of the deformable coupling 413, wherein the first section A1 is configured as a cylinder;

[0100] The first clamping part B1 and the second clamping part B2 are connected by bolts. Specifically, a through hole is provided on the first clamping part B1, and a threaded through hole is provided on the second clamping part B2. The through hole and the threaded through hole are coaxially arranged, and the bolt is passed through the through hole and connected to the threaded through hole. As the bolt is continuously screwed, the distance between the first clamping part B1 and the second clamping part B2 is reduced, thereby clamping the first section A1 of the deformable coupling 413.

[0101] The flat plate portion B3 is fixedly arranged at the connection between the first clamping portion B1 and the second clamping portion B2. The flat plate portion B3 is connected to the mounting seat 401 of the elastic clip 411 by bolts, wherein a threaded through hole is provided on the mounting seat 401, and a connecting through hole is provided on the flat plate portion B3. The bolt is passed through the connecting through hole to connect to the threaded through hole of the mounting seat 401, and the screw is tightened.

[0102] For further information, see Figure 1 , Figure 2 or Figure 6 In the test device for the angular displacement sensor of this embodiment, the transmission mechanism 2 includes a first shaft 201, a second shaft 202 and a heat-insulating shaft 203, the heat-insulating shaft 203 is located between the first shaft 201 and the second shaft 202, and the first shaft 201 and the second shaft 202 are detachably connected to the heat-insulating shaft 203;

[0103] The heat-insulating shaft 203 is made of engineering plastics. Countersunk holes are respectively arranged at both ends of the axial direction of the heat-insulating shaft 203. The first shaft 201 is inserted into one of the countersunk holes, and the second shaft 202 is inserted into the other countersunk hole.

[0104] The first shaft 201 is provided with a cylindrical pin 204, the axial direction of the cylindrical pin 204 is perpendicular to the axial direction of the first shaft 201, and the cylindrical pin 204 is configured to be inserted into the first deformation portion 41;

[0105] The second shaft 202 is connected to the power component.

[0106] In the foregoing content, it has been mentioned that the temperature vibration test chamber 7 can change the temperature in the inner cavity; the temperature in the temperature vibration test chamber 7 is transmitted to the power mechanism 1 through the aforementioned vibration reduction mechanism 4 and the transmission mechanism 2, which may cause the power mechanism 1 to overheat, or cause the encoder arranged on the power mechanism 1 to overheat, causing the power mechanism 1 to shut down due to high temperature, or cause the encoder test results to be inaccurate or unable to be tested.

[0107] Therefore, in this embodiment, see Figure 6A heat-insulating shaft 203 is provided on the transmission mechanism 2, and the first shaft 201 and the second shaft 202 are isolated by the heat-insulating shaft 203. The material of the heat-insulating shaft 203 is engineering plastic, and the material of the first shaft 201 and the second shaft 202 is metal, specifically stainless steel. Since the specific heat of engineering plastic is greater than the specific heat of stainless steel, after the first shaft 201 receives the temperature from the temperature vibration test box 7, most of the heat of the first shaft 201 is first absorbed by the heat-insulating shaft 203 made of engineering plastic, so that the temperature of the heat-insulating shaft 203 is lower than the temperature of the first shaft 201, and then the heat-insulating shaft 203 transfers heat with the second shaft 202, so that the temperature of the second shaft 202 is lower than the temperature of the heat-insulating shaft 203, thereby avoiding overheating of the power mechanism 1, or avoiding overheating of the encoder set on the power mechanism 1, causing the power mechanism 1 to shut down due to high temperature, or causing the test result of the encoder to be inaccurate or unable to be tested.

[0108] For further information, see Figure 1 , Figure 2 or Figure 7 , the testing device for the angular displacement sensor of this embodiment further includes a support frame 3;

[0109] The support frame 3 is provided with a frame 301 and three support ends 302, and the three support ends 302 have a moving state and a static state relative to the frame 301, wherein the three support ends 302 in the static state are configured to contact the insulation shaft 203 in three directions within the same clamping plane, and the insulation shaft 203 is configured to generate a rotational motion relative to the three support ends 302 when receiving rotational kinetic energy.

[0110] In order to further prevent the temperature of the temperature vibration test box 7 from affecting the power mechanism 1 through heat radiation, the technical means that can be adopted include increasing the length of the transmission mechanism 2. However, if the length of the transmission mechanism 2 is increased, then under the action of gravity and the vibration from the temperature vibration test box 7, the aforementioned transmission mechanism 2 will inevitably be tilted or deformed, so that the transmission mechanism 2 cannot remain coaxial with the motor shaft of the power mechanism 1, and the transmission mechanism 2 cannot remain coaxial with the rotating shaft of the angular displacement sensor being detected.

[0111] Therefore, in this embodiment, a support frame 3 is provided at the position of the heat-insulating shaft 203, the purpose of which is to maintain the coaxiality of the transmission mechanism 2 with the motor shaft of the power mechanism 1 and the rotating shaft of the angular displacement sensor, thereby improving the data accuracy of measuring the angular displacement sensor.

[0112] In the above scheme, the support frame 3 is disposed as a whole on a horizontal plane, and the function of the frame 301 is to place the three support ends 302 at the same height as the transmission mechanism 2, so that the three support ends 302 can respectively contact the heat-insulating shaft 203 of the transmission mechanism 2;

[0113] The three support ends 302 are respectively in contact with the heat-insulating shaft 203 along three different directions of the same clamping plane, wherein the clamping plane and the axis of the heat-insulating shaft 203 are perpendicular to each other;

[0114] The function of the three support ends 302 is to limit the position of the insulation shaft 203 so that the insulation shaft 203 cannot produce radial displacement relative to the support frame 3, thereby avoiding the transmission mechanism 2 from tilting or deformation under the action of gravity and vibration from the temperature vibration test box 7, and improving the coaxiality of the transmission mechanism 2 relative to the motor shaft of the power mechanism 1 and the rotating shaft of the angular displacement sensor being detected.

[0115] It should be understood that when receiving the rotational kinetic energy from the power mechanism 1, the transmission mechanism 2 can rotate relative to the three support ends 302 of the support frame 3. Therefore, the friction between the three support ends 302 and the insulation shaft 203 is as small as possible, which can reduce the loss of rotational kinetic energy transmitted to the angular displacement sensor being detected.

[0116] In order to reduce the friction between the three support ends 302 and the heat-insulating shaft 203, the following technical solution is preferably adopted.

[0117] This embodiment is used for the test device of the angular displacement sensor, the frame 301 is configured as a ring with a mounting notch, the inner circumferential surface of the frame 301 forms a mounting area, and the mounting area and the mounting notch are connected along the radial direction of the frame 301;

[0118] The three support ends 302 are respectively located in the installation area. The three support ends 302 are respectively made of polytetrafluoroethylene material. The two ends of any support end 302 are a head end and a tail end respectively. The head end is configured in a pointed cone or spherical shape and is used to contact the insulation shaft 203.

[0119] The installation notch of the frame 301 can be penetrated by the heat-insulating shaft 203 , so that the heat-insulating shaft 203 can be moved from the outside of the frame 301 to the inside of the frame 301 .

[0120] The three support ends 302 are respectively made of polytetrafluoroethylene material, and the surface of the polytetrafluoroethylene material can be polished to be smooth, which is beneficial to reduce the friction between the three support ends 302 and the insulation shaft 203;

[0121] In addition, since the thermal insulation shaft 203 is made of engineering plastics, in order to extend the service life of the thermal insulation shaft 203, the three support ends 302 are made of polytetrafluoroethylene material, so that the hardness of the thermal insulation shaft 203 matches the hardness of the support ends 302; compared with the thermal insulation shaft 203 and the three support ends 302 made of stainless steel or alloy materials, in the scheme of the thermal insulation shaft 203 and the three support ends 302 made of polytetrafluoroethylene material, the thermal insulation shaft 203 has less wear due to friction, because the hardness of stainless steel or alloy materials is higher than that of polytetrafluoroethylene materials.

[0122] Preferably, the thermal insulation shaft 203 in this embodiment is made of polyimide material, and the hardness of the polyimide material is higher than that of the polytetrafluoroethylene material. Therefore, when friction occurs between the thermal insulation shaft 203 made of polyimide material and the three support ends 302 made of polytetrafluoroethylene material, the three support ends 302 made of polytetrafluoroethylene material suffer greater wear, while the thermal insulation shaft 203 made of polyimide material suffers less wear, which is beneficial to further improve the life of the thermal insulation shaft 203.

[0123] The head ends of the three support ends 302 are respectively configured as a pointed cone or a spherical shape, the purpose of which is to reduce the contact area between the three support ends 302 and the insulation shaft 203, which is conducive to further reducing the friction between the three support ends 302 and the insulation shaft 203.

[0124] It should be understood that in the aforementioned support frame 3, the connection structure between the three support ends 302 and the frame 301 can be connected by three bolts, and a support end 302 is respectively provided on any bolt; a threaded through hole is provided on the frame 301, and the bolt is connected to the threaded through hole, wherein the nail head of the bolt is located outside the frame 301, and the screw portion of the bolt is inserted into the interior of the frame 301, and a support end 302 is provided on the end of the screw portion of the bolt.

[0125] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A test device for an angular displacement sensor, characterized in that: Including power mechanism, transmission mechanism, vibration reduction mechanism and temperature vibration test chamber; The power mechanism comprises a power component and a control component, wherein the control component is used to set an angle and control the power component to output rotational kinetic energy according to the set angle; The transmission mechanism is used to receive the rotational kinetic energy and to transmit the rotational kinetic energy to the vibration reduction mechanism; The vibration reduction mechanism is provided with a first deformation part and a second deformation part, a part of the transmission mechanism is connected to the second deformation part, the transmission mechanism is configured as a close contact and movable connection structure relative to the second deformation part, the deformation direction of the second deformation part is along the radial direction of the transmission mechanism, the movable direction of the second deformation part relative to the transmission mechanism is the axial direction of the transmission mechanism, the rotating shaft of the angular displacement sensor is coaxially connected to the first deformation part, and the deformation direction of the first deformation part is the radial direction of the transmission mechanism; A temperature component for changing the temperature of the inner cavity and a vibration component for generating vibration are arranged in the inner cavity of the temperature vibration test box, a fixture for mounting the angular displacement sensor is arranged on the vibration component, and the vibration reduction mechanism and the fixture are jointly limited to form a receiving area for receiving the angular displacement sensor.

2. The testing device for an angular displacement sensor according to claim 1, characterized in that: The vibration reduction mechanism comprises an elastic clip, a clamping block and a deformable coupling, wherein the elastic clip is connected to the deformable coupling via the clamping block; The elastic clip is provided with a mounting seat, a first deformable sheet and a second deformable sheet, the first deformable sheet and the second deformable sheet are configured to be mirror-symmetrical, and the two are respectively fixedly arranged on the mounting seat, the first deformable sheet and the second deformable sheet are parallel to each other and have a spacing, and the first deformable sheet and the second deformable sheet together constitute the second deformable portion; The deformable coupling is provided with a first section, a second section and a third section, the second section is located between the first section and the third section, at least the second section is configured as a cylinder, a surface of the second section is concavely provided with a plurality of deformation grooves, along the circumferential direction of the second section, the circumferential length covered by any two adjacent deformation grooves is less than the sum of the lengths of the two deformation grooves, along the axial direction of the second section, a spacing is formed between any two adjacent deformation grooves, and the plurality of deformation grooves together constitute the first deformation portion; The third section of the deformable coupling is used to connect the rotating shaft of the angular displacement sensor.

3. The testing device for an angular displacement sensor according to claim 2, characterized in that: A first guide piece is provided extending from one end of the first deformable piece away from the mounting seat; A second guide piece is provided extending from one end of the second deformable piece away from the mounting seat; Along the direction from the first deformable piece or the second deformable piece to the mounting seat, the first guide piece and the second guide piece are configured in a convergent shape.

4. The testing device for an angular displacement sensor according to claim 2, characterized in that: The clamp block includes a first clamping portion, a second clamping portion and a flat plate portion which are integrally formed, wherein the first clamping portion and the second clamping portion are respectively provided with arc-shaped clamping grooves, and the flat plate portion is provided with a connecting through hole; The first section is configured as a cylinder, the diameter of the first section is smaller than the diameter of the second section, and the first section is clamped between the two clamping grooves; The mounting seat is connected to the connecting through hole by bolts.

5. The testing device for an angular displacement sensor according to any one of claims 1 to 4, characterized in that: The transmission mechanism comprises a first shaft, a second shaft and a heat-insulating shaft, wherein the heat-insulating shaft is located between the first shaft and the second shaft, and the first shaft and the second shaft are respectively detachably connected to the heat-insulating shaft; The heat-insulating shaft is made of engineering plastics, and countersunk holes are respectively provided at both axial ends of the heat-insulating shaft, the first shaft is inserted into one of the countersunk holes, and the second shaft is inserted into the other countersunk hole; The first shaft is provided with a cylindrical pin, the axial direction of the cylindrical pin is perpendicular to the axial direction of the first shaft, and the cylindrical pin is configured to be inserted into the first deformation portion; The second shaft is connected to the power component.

6. The testing device for an angular displacement sensor according to claim 5, characterized in that: Also includes a support frame; The support frame is provided with a frame and three support ends, and the three support ends have a moving state and a static state relative to the frame, respectively, wherein the three support ends in the static state are configured to contact the thermal insulation shaft in three directions within the same clamping plane, and the thermal insulation shaft is configured to be able to generate a rotational motion relative to the three support ends when receiving the rotational kinetic energy.

7. The testing device for an angular displacement sensor according to claim 6, characterized in that: The frame is configured as a circular ring with a mounting notch, a mounting area is formed between the inner circumferential surfaces of the frame, and the mounting area is communicated with the mounting notch along the radial direction of the frame; The three support ends are respectively located in the installation area, and the three support ends are respectively made of polytetrafluoroethylene material. The two ends of any support end are a head end and a tail end respectively, and the head end is configured in a pointed cone or spherical shape, and the head end is used to contact the insulation shaft.

8. The testing device for an angular displacement sensor according to claim 1, characterized in that: The power component is specifically a motor, and the control component includes an encoder and a controller, the encoder is coaxially connected to the motor shaft of the motor, and the motor and the encoder are electrically connected to the controller respectively; The motor shaft is coaxially connected to the transmission mechanism.

9. The testing device for an angular displacement sensor according to claim 1, characterized in that: The temperature vibration test box has a box body, and the temperature component and the vibration component are respectively arranged in the box body; The box body is provided with a matching hole for being penetrated by the transmission mechanism, and the connection position of the transmission mechanism and the shock absorbing mechanism is restricted in the box body.

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