CN109781565B - Novel test bench for mechanical life abrasion experiment of angular displacement sensor - Google Patents
Novel test bench for mechanical life abrasion experiment of angular displacement sensor Download PDFInfo
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- CN109781565B CN109781565B CN201910138137.6A CN201910138137A CN109781565B CN 109781565 B CN109781565 B CN 109781565B CN 201910138137 A CN201910138137 A CN 201910138137A CN 109781565 B CN109781565 B CN 109781565B
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 29
- 238000002474 experimental method Methods 0.000 title claims abstract description 11
- 238000005299 abrasion Methods 0.000 title abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000001360 synchronised effect Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007306 turnover Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The application relates to the technical field of angular displacement sensor wear test equipment, in particular to a novel test bench for an angular displacement sensor mechanical life wear experiment, which comprises a transmission mechanism, a monitoring mechanism, a clamping structure and a control cabinet; the transmission mechanism comprises a synchronous motor, a crank disc connected with a driving shaft of the synchronous motor, an adjustable connecting rod with one end connected with the crank disc, and a rocker assembly connected with the other end of the adjustable connecting rod; the rocker assembly comprises a plurality of rockers, a rocker pendulum shaft connected with one end of each rocker and rocker connecting pieces which are used for connecting all the other ends of the rockers, and the rocker connecting pieces are connected with the adjustable connecting rods. The test bench can carry out abrasion test on the mechanical life of any rotary type angular displacement sensor, and can carry out the test through the swinging mode closest to the actual use state.
Description
Technical Field
The invention relates to the technical field of angular displacement sensor wear testing equipment, in particular to a novel test bench for an angular displacement sensor mechanical life wear experiment.
Background
The current method for testing the mechanical life abrasion of the angular displacement sensor is to drive the output shaft of the angular displacement sensor by a motor through a speed reducing device or a belt pulley to carry out continuous turnover test, namely, the electric brush in the sensor continuously rotates at 360 degrees. Such a test mode has mainly the following drawbacks: 1) In practical use, the mechanical angle of the product is far smaller than 360 degrees, the electrical angle is smaller than the mechanical angle of the product, and the angle required by the signal output change of most electromechanical devices is only in a certain smaller angle range. Then, the existing test mode of continuous turnover movement cannot well reflect the abrasion condition of the guide rail in a certain angle. 2) Inside the angular displacement sensor, the neutral position is arranged between the front zero position area and the rear zero position area of the resistance guide rail, the electric brush does not pass through the position during normal use, and the 360-degree turnover test avoids the situation that the electric brush does not pass through the position, so that the stroke of the electric brush at the position increases the total consumption, the economy is not high, the abrasion of the electric brush is increased without any reason, and the judgment of the test result is influenced. 3) The current turnover test cannot test the multi-turn sensor because the number of turns is limited, and the continuous rotation can reach the stop gear and finally stop. 4) The current turnaround test cannot adjust the test parameters according to the actual demands of the users, i.e. the abrasion loss in a certain use area.
The conventional fatigue detection of the angular displacement sensor at present is to drive a sensor rotating shaft by a motor to perform uniform circumferential motion test, and the test method ensures that the abrasion loss of an internal resistance track of the sensor is uniform, the abrasion loss in a certain angle can not be simulated in actual use, the time consumption is long, parameters of different use occasions can not be set, and an accurate fatigue damage result can not be obtained, so that the abrasion state of the actual use of the angular displacement sensor can not be reflected in the conventional mode. Accordingly, there is a need for improvements to existing angular displacement sensor wear testing equipment.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a novel test bench for mechanical life abrasion experiments of an angular displacement sensor.
The technical scheme adopted for solving the technical problems is as follows: a novel test bench for an angular displacement sensor mechanical life abrasion experiment comprises a transmission mechanism, a monitoring mechanism, a clamping structure and a control cabinet;
The transmission mechanism comprises a synchronous motor, a crank disc connected with a driving shaft of the synchronous motor, an adjustable connecting rod with one end connected with the crank disc, and a rocker assembly connected with the other end of the adjustable connecting rod; the rocker assembly comprises a plurality of rockers, a rocker pendulum shaft connected with one end of each rocker, and rocker connecting pieces which are used for connecting all the other ends of the rockers, wherein the rocker connecting pieces are connected with the adjustable connecting rods;
the clamping structure comprises a pair of large support plates connected with a base plate, and shaft connecting pieces for connecting the large support plates and the rocker shafts, wherein the large support plates are provided with through holes for allowing free ends of the rocker shafts to pass through, the free ends of the rocker shafts are connected with couplings, the clamping structure further comprises concentric limiting plates connected with the large support plates, a fastening knob mounting frame connected with the concentric limiting plates, a fastening knob connected with the fastening knob mounting frame, concentric holes matched with the couplings to be used are formed in the concentric limiting plates, and the fastening knob is matched with the concentric holes to be arranged;
the monitoring mechanism comprises a rocker swinging frequency counting assembly matched with the rocker and a rotating speed counting assembly matched with the crank disc.
Preferably, the crank disk is provided with a radial adjustment groove connected with the adjustable connecting rod.
Preferably, the crank disk is provided with reference graduation marks on the side of the radial adjusting groove.
Preferably, the adjustable connecting rod comprises an adjusting rod body, a first plug connector which is inserted into an adjusting port at one axial end of the adjusting rod body, a second plug connector which is inserted into an adjusting port at the other axial end of the adjusting rod body, the first plug connector is connected with the rocker connecting piece through a movable joint bolt, the second plug connector is connected with the crank disc through a movable joint bolt, and the first plug connector and the second plug connector are connected with the adjusting rod body through fastening screws.
Preferably, the first plug connector and the second plug connector are provided with adjusting scale marks.
Preferably, the rocker swinging frequency counting assembly comprises infrared transmitters and infrared receivers which are symmetrically arranged on two sides of the large support plate, an infrared counter support for mounting the infrared transmitters or the infrared receivers, and infrared penetrating holes which are symmetrically arranged on the large support plate.
Preferably, the base plate is provided with an adjusting slide rail for the infrared counter bracket to move.
Preferably, the rotational speed statistics component comprises a Hall detector, a magnet arranged on the circumferential end face of the crank disc and matched with the Hall detector, and a Hall detector mounting frame for mounting the Hall detector.
Preferably, the control cabinet comprises an infrared counter switch, an infrared counting display, a Hall magnetic induction speed switch, a Hall magnetic induction speed display screen, a main switch and a motor speed regulator; the control cabinet further comprises an emergency stop switch and a buzzer.
Preferably, the clamping structure further comprises a fixed pressing block connected with the fastening knob.
The test board has the beneficial effects that the test board can carry out abrasion test on the mechanical life of any rotary type angular displacement sensor, and the test board is tested through the swinging mode closest to the actual use state;
For the carbon film sensor with higher precision and service life, the high-rotation speed and high-frequency operation parameters can be selected for testing; for similar wire-wound sensors, the service life is not high, and the sensor is regulated by manpower in actual use, so that the operation parameters of low rotation speed, high torque and low frequency can be selected for testing;
And can select different test angles to simulate the test according to different use angles of users, and in the long-time test process, the personnel count and adjustment are not needed, the set parameters can be automatically carried out, and the current rotating speed and the tested times can be read at any time in the test process.
Drawings
FIG. 1 is a schematic diagram of a driving mechanism of a test stand according to the present invention;
FIG. 2 is a front view of a test stand of the present invention;
FIG. 3 is a schematic diagram of the control cabinet of FIG. 2;
FIG. 4 is a schematic view of a test portion of the test stand of FIG. 2;
FIG. 5 is a top view of a test stand of the present invention;
FIG. 6 is a schematic view of a test portion of the test stand of FIG. 5;
FIG. 7 is a left side view of the test stand of the present invention;
The device comprises a synchronous motor 11, a synchronous motor 12, a crank disc 13, an adjustable connecting rod 14, a rocker 15, a rocker pendulum shaft 16, a radial adjusting groove 17 and a rocker connecting piece; 21. the base plate, 22, the large support plate, 23, the shaft connecting piece, 24, the coupler, 25, the concentric limiting plate, 26, the fastening knob mounting rack, 27 and the fastening knob; 31. the infrared transmitter, 32, the infrared receiver, 33, the infrared counter bracket, 34 and the adjusting slide rail; 41. hall detector, 42, magnet, 43, hall detector mounting bracket, 51, infrared counter switch, 52, infrared count display, 53, hall magnetic induction speed switch, 54, hall magnetic induction speed display screen, 55, master switch, 56, scram switch, 57, buzzer, 58, motor speed regulator.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 7, a novel test bench for mechanical life abrasion test of an angular displacement sensor comprises a transmission mechanism, a monitoring mechanism, a clamping structure and a control cabinet. The application considers the action characteristics of the angular displacement sensor in actual use, namely different rotation speeds, different mechanical rotation angles, different electric rotation angles, different impact frequencies and the like in different use occasions, so that the setting of adjustable parameters is required to simulate the actual use state.
The transmission mechanism comprises a synchronous motor 11, a crank disc 12 connected with a driving shaft of the synchronous motor 11, an adjustable connecting rod 13 with one end connected with the crank disc 12, and a rocker assembly connected with the other end of the adjustable connecting rod 13. The rocker assembly comprises a plurality of rockers 14, a rocker shaft 15 connected with one end of each rocker 14, and rocker connecting pieces 17 connecting the other ends of the rockers 14, wherein the rocker connecting pieces 17 are connected with the adjustable connecting rods 13. According to the practical application mode of the angular displacement sensor, most of the internal brushes only work on a certain section of the resistance guide rail and slide back and forth on the arc of the resistance track at a certain central angle, so that the principle of a crank rocker mechanism is utilized as a transmission scheme.
The synchronous motor 11 drives the crank disc 12 to rotate, and the crank disc 12 can drive the adjustable connecting rod 13 to move when rotating, so that the rocker 14 swings in a certain radian by taking the rocker pendulum shaft 15as a center point. The application has 5 sets of rocking bars 14 which are connected by rocking bar connecting pieces 17, so that the rocking bars 14 of 5 sets do rocking motion synchronously. In the swinging process of the rocker 14, two ends of the rocker pendulum shaft 15 can drive the output shafts of 10 test products to do the same swinging motion through the coupler 24.
The crank disc 12 is provided with a radial adjusting groove 16 connected with the adjustable connecting rod 13, and the side of the crank disc 12 at the radial adjusting groove 16 is provided with a contrast scale mark. The radial adjusting grooves 16 are uniformly provided with a plurality of bayonets at certain intervals, each bayonet corresponds to one scale mark, and the end part of the adjustable connecting rod 13 can be clamped according to the bayonet which is required by contrast with the scale mark, so that the adjustment of the swinging angle range when the rocker 14 swings is realized.
The adjustable connecting rod 13 comprises an adjusting rod body, a first plug connector which is plugged with an adjusting port at one axial end of the adjusting rod body, a second plug connector which is plugged with an adjusting port at the other axial end of the adjusting rod body, the first plug connector is connected with the rocker connecting piece 17 through a movable joint bolt, the second plug connector is connected with the crank disc 12 through a movable joint bolt, and the first plug connector and the second plug connector are connected with the adjusting rod body through fastening screws. The first plug connector and the second plug connector are both provided with adjusting scale marks.
When the length of the adjustable connecting rod 13 needs to be adjusted, the fastening screw can be unscrewed firstly, then the first plug connector or the second plug connector is inserted into or extends out of one point of the adjusting port according to the adjusting scale mark, and finally the first plug connector or the second plug connector is fixed with the adjusting rod body through the fastening screw so as to adjust the length of the adjustable connecting rod 13. The range of the swinging angle of the rocker 14 can be further adjusted by adjusting the length of the adjustable connecting rod 13.
The clamping structure comprises a pair of large support plates 22 connected with a base plate 21, shaft connecting pieces 23 for connecting the large support plates 22 with a rocker pendulum shaft 15, wherein through holes allowing the free ends of the rocker pendulum shaft 15 to pass through are formed in the large support plates 22, a coupler 24 is connected to the free ends of the rocker pendulum shaft 15, the clamping structure further comprises concentric limiting plates 25 connected with the large support plates 22, a fastening knob mounting frame 26 connected with the concentric limiting plates 25, and a fastening knob 27 connected with the fastening knob mounting frame 26, concentric holes matched with the coupler 24 are formed in the concentric limiting plates 25, and the fastening knob 27 is matched with the concentric holes. The clamping structure further comprises a fixed pressing block connected with the fastening knob 27.
When the angular displacement sensor is installed, the output shaft of the angular displacement sensor passes through the concentric hole to be connected with the coupler 24, the rotation angle range to be detected is adjusted during connection, and then the shell of the angular displacement sensor is pressed by the fixed pressing block on the fastening knob 27 and the concentric limiting plate 25. The rocker 14 only drives the output shaft of the angular displacement sensor to rotate when swinging. The clamping structure can be used for independently clamping 1 or 10 products tested by the machine.
The monitoring mechanism includes a rocker swing count component for use with the rocker 14 and a rotational speed count component for use with the crank disk 12.
The rocker swinging frequency counting assembly comprises infrared transmitters 31 and infrared receivers 32 which are symmetrically arranged on two sides of the large support plate 22, an infrared counter support 33 for mounting the infrared transmitters 31 or the infrared receivers 32, and infrared penetrating holes which are symmetrically arranged on the large support plate 22.
When the rocker 14 does not swing, the infrared receiver 32 receives the infrared rays emitted by the infrared emitter 31 when the rocker 14 swings, and the infrared rays are blocked again when the rocker 14 swings back, so that statistics of the swinging times of the rocker 14 are realized. The base plate 21 is provided with an adjusting slide rail 34 for moving the infrared counter support 33, and the adjusting slide rail 3 can fine tune the infrared counter support 33 so that the infrared emitter 31 and the infrared receiver 32 can be aligned.
The rotational speed statistics component comprises a Hall detector 41, a magnet 42 arranged on the periphery Xiang Duanmian of the crank disc 12 and matched with the Hall detector 41 for use, and a Hall detector mounting frame 43 for mounting the Hall detector 41. When the hall detector 41 corresponds to the magnet 42, a corresponding signal can be detected, so that the rotational speed of the crank disk 12 can be counted.
The control cabinet comprises an infrared counter switch 51, an infrared count display 52, a Hall magnetic induction speed measuring switch 53, a Hall magnetic induction speed measuring display screen 54, a main switch 55 and a motor speed regulator 58, wherein after an angular displacement sensor to be detected is installed, the main switch 55 can be opened for detection, the specific rotating speed of the synchronous motor 11 can be regulated through the motor speed regulator 58, so that the rotating speed of the crank disc 12 is regulated, and the actual rotating speed of the crank disc 12 can be detected and displayed on the Hall magnetic induction speed measuring display screen 54 after the Hall magnetic induction speed measuring switch 53 is opened. After the infrared counter switch 51 is turned on, the swinging times of the rocker 14 can be counted through the infrared emitter 31 and the infrared receiver 32 and displayed through the infrared counter display 52. The control cabinet can preset each parameter or process and display each signal after being acquired.
The control cabinet further comprises an emergency stop switch 56 and a buzzer 57, when the test bench breaks down, the buzzer 57 gives an alarm, and a worker can stop the test bench through the emergency stop switch 56, so that the safety is high.
The above examples are only illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical scheme of the present invention will fall within the protection scope of the present invention without departing from the design concept of the present invention, and the technical content of the present invention is fully described in the claims.
Claims (5)
1. A novel testboard for angular displacement sensor mechanical life wearing and tearing experiments, its characterized in that: the device comprises a transmission mechanism, a monitoring mechanism, a clamping structure and a control cabinet;
the transmission mechanism comprises a synchronous motor (11), a crank disc (12) connected with a driving shaft of the synchronous motor (11), an adjustable connecting rod (13) with one end connected with the crank disc (12) and a rocker assembly connected with the other end of the adjustable connecting rod (13); the rocker assembly comprises a plurality of rockers (14), a rocker pendulum shaft (15) connected with one end of each rocker (14), and rocker connecting pieces (17) which are used for connecting all the other ends of the rockers (14), wherein the rocker connecting pieces (17) are connected with the adjustable connecting rods (13);
The clamping structure comprises a pair of large support plates (22) connected with a base plate (21), shaft connecting pieces (23) for connecting the large support plates (22) with a rocker pendulum shaft (15), through holes allowing free ends of the rocker pendulum shaft (15) to pass through are formed in the large support plates (22), a coupler (24) is connected with the free ends of the rocker pendulum shaft (15), the clamping structure further comprises concentric limiting plates (25) connected with the large support plates (22), a fastening knob mounting frame (26) connected with the concentric limiting plates (25), a fastening knob (27) connected with the fastening knob mounting frame (26), concentric holes matched with the coupler (24) are formed in the concentric limiting plates (25), and the fastening knob (27) is matched with the concentric holes; the clamping structure further comprises a fixed pressing block connected with the fastening knob (27);
the monitoring mechanism comprises a rocker swinging frequency counting assembly matched with the rocker (14) and a rotating speed counting assembly matched with the crank disc (12);
The rocker swinging frequency counting assembly comprises infrared transmitters (31) and infrared receivers (32) which are symmetrically arranged on two sides of the large support plate (22), an infrared counter support (33) which is provided with the infrared transmitters (31) or the infrared receivers (32), and infrared penetrating holes which are symmetrically arranged on the large support plate (22); an adjusting sliding rail (34) for the infrared counter bracket (33) to move is arranged on the base plate (21);
When the rocker (14) does not swing, the infrared rays between the infrared emitter (31) and the infrared receiver (32) are cut off by the rocker connecting piece (17), when the rocker (14) swings, the infrared receiver (32) receives the infrared rays emitted by the infrared emitter (31), and when the rocker (14) swings back, the infrared rays are shielded again, so that statistics of the swinging times of the rocker (14) are realized;
The adjustable connecting rod (13) comprises an adjusting rod body, a first plug connector which is plugged with an adjusting port at one axial end of the adjusting rod body, a second plug connector which is plugged with an adjusting port at the other axial end of the adjusting rod body, the first plug connector is connected with the rocker connecting piece (17) through a movable joint bolt, the second plug connector is connected with the crank disc (12) through a movable joint bolt, and the first plug connector and the second plug connector are both connected with the adjusting rod body through fastening screws;
The rotating speed counting assembly comprises a Hall detector (41), a magnet (42) which is arranged on the circumferential end face of the crank disc (12) and matched with the Hall detector (41), and a Hall detector mounting frame (43) for mounting the Hall detector (41).
2. A novel test bench for mechanical life wear experiments of angular displacement sensors according to claim 1, characterized in that: the crank disc (12) is provided with a radial adjusting groove (16) connected with the adjustable connecting rod (13).
3. A novel test bench for mechanical life wear experiments of angular displacement sensors according to claim 2, characterized in that: the crank disc (12) is provided with contrast graduation marks at the side of the radial adjusting groove (16).
4. A novel test bench for mechanical life wear experiments of angular displacement sensors according to claim 1, characterized in that: the first plug connector and the second plug connector are both provided with adjusting scale marks.
5. A novel test bench for mechanical life wear experiments of angular displacement sensors according to claim 1, characterized in that: the control cabinet comprises an infrared counter switch (51), an infrared counting display (52), a Hall magnetic sensing speed sensor switch (53), a Hall magnetic sensing speed sensor display screen (54), a main switch (55) and a motor speed regulator (58); the control cabinet further comprises an emergency stop switch (56) and a buzzer (57).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910138137.6A CN109781565B (en) | 2019-02-25 | 2019-02-25 | Novel test bench for mechanical life abrasion experiment of angular displacement sensor |
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| CN201910138137.6A CN109781565B (en) | 2019-02-25 | 2019-02-25 | Novel test bench for mechanical life abrasion experiment of angular displacement sensor |
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| CN109781565B true CN109781565B (en) | 2024-05-14 |
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| CN109781565A (en) | 2019-05-21 |
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