CN220670456U

CN220670456U - Distance test jig for sensor

Info

Publication number: CN220670456U
Application number: CN202321806305.2U
Authority: CN
Inventors: 张永赛; 严甫
Original assignee: Huayifeng Technology Dongguan Co ltd
Current assignee: Huayifeng Technology Dongguan Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-03-26
Anticipated expiration: 2033-07-10

Abstract

The application relates to the technical field of sensor testing, especially, relate to a distance test fixture for sensor, it include the workstation, set up in on the workstation and be used for fixing the fixing base of sensor, set up in on the workstation and with the fixing base is located the moving mechanism on the same straight line, set up in moving mechanism is close to the induction piece of fixing base one side, set up in on the workstation and be used for detecting the testing mechanism of induction piece displacement, moving mechanism is used for the drive the induction piece towards fixing base one side removes. The sensor testing device improves the condition that the sensor testing device is difficult to accurately measure the distance of the sensor.

Description

Distance test jig for sensor

Technical Field

The application relates to the technical field of sensor testing, in particular to a distance testing jig for a sensor.

Background

Currently, with the continuous development of electronic devices, sensors are widely used in various fields. The sensor is used as a detecting device, can sense the measured information, and can convert the sensed information into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.

The sensor needs to detect a series of performance parameters before leaving the factory, for example, the sensor has an error range of distance, and when the measured distance of the distance sensor is smaller than the range, the sensor is a defective product. For the sensor just produced, whether the sensor is useful is generally determined by testing whether the sensor senses, and the distance sensed by the tester judges whether the sensor meets the production requirement. However, the existing distance sensor distance sensing test equipment is simple in structure, the distance sensor is simply tested to determine whether sensing exists after production, and the measurable range of the distance sensor cannot be accurately tested, so that the situation needs to be improved.

Disclosure of Invention

In order to improve the condition that the sensor test equipment is difficult to accurate the measuring distance of sensor, the application provides a distance test tool for sensor.

The application provides a distance test tool for sensor adopts following technical scheme:

the utility model provides a distance test tool for sensor, includes the workstation, set up in on the workstation and be used for fixing the fixing base of sensor, set up in on the workstation and with the fixing base is located the moving mechanism on the same straight line, set up in moving mechanism is close to the response piece of fixing base one side, set up in on the workstation and be used for detecting the testing mechanism of the displacement of response piece, moving mechanism is used for the drive the response piece towards fixing base one side removes.

By adopting the technical scheme, after the production of the distance sensor is completed, the distance sensor is placed on the fixed seat, the moving mechanism drives the induction piece to move towards one side of the fixed seat, one side of the distance sensor, which is close to the induction piece, is a detection end, when the induction piece enters the detection range of the distance sensor, the distance sensor performs detection work, and when the distance sensor detects the induction piece, the induction lamp of the distance sensor can be lightened; when the distance between the initial position of the sensing piece and the distance sensor is determined, the detection range of the distance sensor can be obtained only by detecting the displacement of the sensing piece through the detection mechanism, so that the situation that the sensor testing equipment is difficult to accurately measure the distance of the sensor is improved.

Optionally, the moving mechanism includes set up in on the workstation and one end with the base that the fixing base is fixed, set up in on the base and supply the removal seat that the response piece was placed, set up in the base is close to remove seat one side and supply remove the sliding tray that the seat removed, set up in on the base and with the guide rail that the sliding tray length direction is parallel, set up in remove on the seat and supply the guide rail runs through remove the hole, set up in drive piece on the base, the drive piece is used for the drive remove the seat along the length direction reciprocating motion of sliding tray.

By adopting the technical scheme, the induction piece is arranged on one side of the movable seat close to the fixed seat, and the movable seat is driven to slide in the sliding groove by the driving piece, so that the induction piece is driven to move; in order to improve the detection accuracy, the movable seat needs to be controlled to reciprocate along a straight line, the guide rail is arranged on the base, and the guide rail penetrates through the movable seat through the through hole, so that the movable seat can only slide along the length direction of the guide rail, and the sliding track of the movable seat is limited.

Optionally, the driving piece is the lead screw, lead screw one end with the fixing base rotates to be connected, the other end of lead screw wears out the base, just the lead screw with the guide rail is parallel, be provided with the drive hole that supplies the lead screw to pass on the removal seat, be provided with in the drive hole be used for with lead screw threaded connection's internal thread.

By adopting the technical scheme, one end of the screw rod penetrates through the driving hole on the movable seat and then is rotationally connected with the fixed seat, and the movable seat can be moved by rotating the screw rod due to the internal thread threaded connection of the screw rod and the driving hole; if the screw rod rotates clockwise, the movable seat moves towards one side of the fixed seat, and when the screw rod rotates anticlockwise, the movable seat moves towards one side far away from the fixed seat.

Optionally, a rotating handle is disposed on one side of the screw rod away from the fixing seat.

Through adopting above-mentioned technical scheme, installation twist grip on the lead screw, the staff of being convenient for drives the lead screw and rotates, is favorable to improving the efficiency of software testing to distance sensor.

Optionally, the testing mechanism includes set up in on the workstation and be used for measuring the grating displacement sensor of the displacement of response piece, set up in on the workstation and with the display screen that grating displacement sensor electricity is connected.

Through adopting above-mentioned technical scheme, measure the displacement of response piece through grating displacement sensor, and transmit the measured value to the display screen on, the display screen shows the displacement data of response piece, and the staff of being convenient for more audio-visual to observe the displacement data of response piece.

Optionally, be provided with on the workstation and supply grating displacement sensor gliding track, grating displacement sensor is close to remove seat one side and be provided with the linkage piece, it is close to remove the seat linkage piece one side is provided with the fixed slot that supplies the linkage piece to imbed, and the linkage piece is fixed in the fixed slot.

Through adopting above-mentioned technical scheme, grating displacement sensor passes through the linkage piece and removes the seat relatively fixed, when removing the seat and producing the displacement, grating displacement sensor also produces the displacement on the track that slides correspondingly, when removing the frame and remove, the periodic light intensity change of moire fringe on grating pair of grating displacement sensor, converts sinusoidal waveform signal into through photoelectric conversion component, can obtain grating displacement after electronic parts such as amplifying, plastic, subdivision, count and demonstration.

Optionally, the moving mechanism includes the mount, set up in micrometer on the mount, the micrometer includes the measuring stick, is used for the drive the differential head that the measuring stick removed, be provided with on the mount and supply the through-hole that the measuring stick passed, the response piece set up in the measuring stick is close to on fixing base one side.

By adopting the technical scheme, the moving mechanism can also be a combination of the fixing frame and the micrometer, and the measuring rod is driven to move by the micro head, so that the induction piece is driven to move towards one side of the fixing seat; the differential head is also called a spiral micrometer and is manufactured according to the principle of spiral amplification, and the measuring rod can be controlled to move only along the axial direction, so that the induction piece is improved to move along the same axial direction, and the detection precision is improved.

Optionally, the testing mechanism includes a linear displacement sensor disposed between the measuring rod and the differential head, and a display portion disposed on the linear displacement sensor.

Through adopting above-mentioned technical scheme, linear displacement sensor is used for detecting the travel distance of measuring stick, is equivalent to detecting the displacement of sensing piece, and the rethread display part shows the displacement data of sensing piece, and the staff of being convenient for more audio-visual to observe the travel distance of sensing piece.

Optionally, the micro-head is provided with anti-skid patterns.

Through adopting above-mentioned technical scheme, be equipped with anti-skidding line on the differential head, when the staff rotated the differential head, improve frictional force through anti-skidding line to reduce the probability that leads to the hand-off because of the differential head is too smooth.

In summary, the method comprises at least one of the following beneficial technical effects:

1. when the sensing piece enters the detection range of the distance sensor, the sensing lamp of the distance sensor can be lightened, and when the distance between the initial position of the sensing piece and the distance sensor is determined, the detection range of the distance sensor can be obtained only by detecting the displacement of the sensing piece through the detection mechanism, so that the condition that the sensor testing equipment is difficult to accurately measure the distance of the sensor is improved.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a distance testing fixture for a sensor according to an embodiment of the present application;

FIG. 2 is a top view of a distance testing jig for a sensor according to an embodiment of the present application;

FIG. 3 is an exploded view of the mobile seat and base in an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 3 in accordance with an embodiment of the present application;

FIG. 5 is a schematic diagram of the configuration of the glide track and grating displacement sensor in an embodiment of the present application;

FIG. 6 is a schematic diagram of the overall structure of a distance testing fixture for a sensor according to embodiment 2 of the present application;

fig. 7 is a top view of a distance testing jig for a sensor in embodiment 2 of the present application.

Reference numerals illustrate:

1. a work table; 2. a fixing seat; 3. a moving mechanism; 4. an induction piece; 5. a testing mechanism; 6. a base; 7. a movable seat; 8. a sliding groove; 9. a guide rail; 10. a moving hole; 11. a screw rod; 12. a drive hole; 13. rotating the handle; 14. a grating displacement sensor; 15. a display screen; 16. a glide track; 17. a linkage piece; 18. a fixing groove; 19. a fixing frame; 20. a micrometer; 21. a measuring rod; 22. a differentiating head; 23. a through hole; 24. a linear displacement sensor; 25. and a display unit.

Detailed Description

The following is a further detailed description.

Example 1

The embodiment of the application discloses a distance test fixture for sensor. Referring to fig. 1 and 2, the device comprises a workbench 1, a fixed seat 2, a moving mechanism 3, an induction piece 4 and a testing mechanism 5. The fixing seat 2, the moving mechanism 3 and the testing mechanism 5 are all fixed on the workbench 1, and the induction piece 4 is arranged on one side of the moving mechanism 3, which is close to the fixing seat 2. When the distance sensor needs to be detected, the distance sensor is fixed on the fixed seat 2, for example, a groove matched with the shape of the distance sensor is formed in the fixed seat 2, or the distance sensor is clamped on the fixed seat 2 through an elastic sheet. In order to improve the accuracy of the detection, the moving mechanism 3 and the fixed seat 2 are positioned on the same straight line, so that the sensing piece 4 and the distance sensor are also positioned on the same straight line. After the sensor chip 4 is displaced by the moving mechanism 3, the test mechanism 5 detects displacement data of the sensor chip 4.

In the embodiment of the application, before the distance sensor is delivered out of the warehouse, the distance sensor needs to be tested, whether the distance sensor senses the distance sensor or not is tested, and whether the measured distance of the distance sensor meets the standard or not is tested. After the production and assembly of the distance sensor are completed, the distance sensor is fixed on the fixed seat 2, the test end of the distance sensor faces one side of the sensing piece 4, and the sensing piece 4 is driven to move towards one side of the fixed seat 2 through the moving mechanism 3. If the distance sensor is a qualified product, when the sensing piece 4 enters the detection range of the distance sensor, the sensing lamp of the distance sensor itself will be lighted. Therefore, when the distance between the initial position of the sensing piece 4 and the distance sensor is determined, the detection range of the distance sensor can be obtained only by measuring the displacement of the sensing piece 4 through the testing mechanism 5. According to the scheme, the sensing piece 4 is matched with the moving mechanism 3, when the sensing piece 4 enters a detection area of the distance sensor, a sensing lamp of the qualified distance sensor can be lightened, and whether the distance sensor senses or not is tested; the detection range of the distance sensor can be indirectly obtained through the measurement of the displacement of the sensing piece 4 by the testing mechanism 5, and the measurement distance of the distance sensor is tested, so that the situation that the sensor testing equipment is difficult to accurately measure the distance of the sensor is improved.

Referring to fig. 3 and 4, the moving mechanism 3 includes a base 6, a moving seat 7, a sliding groove 8, a guide rail 9, a moving hole 10, and a driving member. The base 6 is fixed on the workbench 1, one end of the base 6 along the width direction is fixed on the fixed seat 2, the movable seat 7 is mounted on the fixed seat 2, the movable seat 7 slides along the length direction of the fixed seat 2, a sliding groove 8 for the movable seat 7 to define is formed in one side of the base 6 close to the movable seat 7 for facilitating the sliding of the movable seat 7, and the movable seat 7 reciprocates in the sliding groove 8 through a driving piece. In order to improve the accuracy of the jig for testing the distance sensor, a guide rail 9 is mounted on the base 6, the length direction of the guide rail 9 is parallel to the length direction of the sliding groove 8, two ends of the guide rail 9 are respectively fixed on the inner walls of two opposite sides of the sliding groove 8, and a moving hole 10 for the guide rail 9 to pass through is formed in the moving seat 7, so that the moving seat 7 can only move along the length direction of the guide rail 9. The driving piece is a screw rod 11, one end of which is rotationally connected with the fixed seat 2, the other end of which penetrates out of the base 6, the screw rod 11 is parallel to the length direction of the guide rail 9, a driving hole 12 for the screw rod 11 to penetrate through is formed in the movable seat 7, and an internal thread which is in threaded connection with the screw rod 11 is arranged in the driving hole 12, so that the movable seat 7 can slide back and forth in the sliding groove 8 through the limiting effect of the rotary screw rod 11 and the guide rail 9 on the movable seat 7. In order to further facilitate the rotation of the driving screw 11, a rotating handle 13 is mounted on the side of the screw 11 remote from the fixing seat 2.

In the embodiment of the application, the induction piece 4 is arranged on one side of the movable seat 7 close to the fixed seat 2, and the movable seat 7 is driven to move in the sliding groove 8 by rotating the screw rod 11 due to the threaded connection of the screw rod 11 and the internal threads of the driving hole 12; if the moving seat 7 moves toward the fixed seat 2 side when the screw 11 rotates clockwise, the moving seat 7 moves away from the fixed seat 2 side when the screw 11 rotates counterclockwise. In order to improve the accuracy of detection, the moving track of the movable seat 7 needs to be limited, and the guide rail 9 is installed on the fixed seat 2, so that the movable seat 7 slides along the length direction of the guide rail 9, the movable seat 7 is ensured to run along a straight line, and the detection error is reduced.

Referring to fig. 4 and 5, the testing mechanism 5 includes a grating displacement sensor 14 and a display screen 15, the grating displacement sensor 14 being mounted on the table 1 and configured to detect the distance of the sensor chip 4. In order to enable a worker to intuitively observe the moving distance of the sensing piece 4, the display screen 15 is electrically connected with the grating displacement sensor 14, and the display screen 15 is used for displaying displacement data detected by the grating displacement sensor 14. The worktable 1 is provided with a sliding rail 16 for sliding the grating displacement sensor 14, a linkage piece 17 is arranged on one side of the grating displacement sensor 14 close to the movable seat 7 for maintaining the synchronism with the movable seat 7, the grating displacement sensor 14 is provided with a fixed slot 18 for embedding the linkage piece 17, and the linkage piece 17 can be fixed on the movable seat 7 through a fastener such as a screw, a bolt and the like. When the movable seat 7 moves, the periodical light intensity variation of moire fringes on the grating pair of the grating displacement sensor 14 is converted into a sine waveform electric signal through the photoelectric conversion element, and the grating displacement can be obtained after electronic parts such as amplification, shaping, subdivision, counting and display.

The grating displacement sensor 14, for short, a grating ruler is a measurement feedback device working by utilizing the optical principle of a grating; the grating displacement sensor 14 operates on the principle that when the main grating and the sub-grating in a pair of grating pairs are relatively displaced, a regular fringe pattern with black and white or light and shade alternately is generated under the combined action of light interference and diffraction, which is called moire fringes; the strips with the same black and white are converted into electric signals with sine wave change through photoelectric device conversion, then the electric signals are amplified by an amplifier, and after being shaped by a shaping circuit, two paths of sine waves or square waves with the phase difference of 90 degrees are obtained and sent to a grating digital display meter for counting and displaying.

In this embodiment of the application, displacement of the sensing piece 4 is measured through the grating displacement sensor 14, and the measured value is transmitted to the display screen 15, the display screen 15 displays displacement data of the sensing piece 4, and staff can observe the displacement data of the sensing piece 4 more intuitively.

The implementation principle of the distance test fixture for the sensor in embodiment 1 of the application is as follows: after the production and assembly of the distance sensor are completed, the distance sensor is fixed on the fixed seat 2, the test end of the distance sensor faces one side of the sensing piece 4, the fixed seat 2 is detachably arranged, and when products in different shapes are replaced, the matched fixed seat 2 can be replaced compared with the fixed seat, so that the detection of various products can be realized by the scheme of the application. Since the sensing piece 4 is fixed on the side of the movable seat 7 close to the fixed seat 2, the movable seat 7 moves towards the fixed seat 2 by rotating the screw rod 11, so that the sensing piece 4 moves towards the fixed seat 2. If the distance sensor is a qualified product, when the sensing piece 4 enters the detection range of the distance sensor, the sensing lamp of the distance sensor itself will be lighted. The displacement of the sensing piece 4 is detected through the grating displacement sensor 14, and data are transmitted to the display screen 15, so that staff can observe whether the data are in a reasonable range intuitively. According to the scheme, when the sensing piece 4 enters the detection area of the distance sensor, the sensing lamp of the qualified distance sensor can be lightened, so that whether the distance sensor senses or not is tested; the detection range of the distance sensor can be indirectly obtained through the measurement of the displacement of the sensing piece 4 by the grating displacement sensor 14, and the measurement distance of the distance sensor is tested, so that the situation that the sensor testing equipment has difficulty in accurately measuring the measurement distance of the sensor is improved.

Example 2

Referring to fig. 6 and 7, embodiment 2 differs from embodiment 1 in that the moving mechanism 3 and the testing mechanism 5 are different, and the moving mechanism 3 includes a fixed frame 19 and a micrometer 20; the test mechanism 5 includes a linear displacement sensor 24 and a display portion 25. The micrometer 20 is fixed on the fixing frame 19, the micrometer 20 comprises a measuring rod 21 and a differential head 22, the fixing frame 19 is provided with a through hole 23 for the measuring rod 21 to pass through, the measuring rod 21 is positioned on one side of the fixing frame 19 close to the fixing seat 2 after passing through, and the sensing piece 4 is fixed on one side of the measuring rod 21 close to the fixing seat 2. Since the smooth outer wall of the differential head 22 is likely to cause a hand slip when the differential head 22 is rotated, anti-slip lines are provided on the outer wall of the differential head 22. When the distance sensor is detected, the differential head 22 is rotated to enable the measuring rod 21 to move towards one side of the fixed seat 2, so that the sensing piece 4 is driven to move. The linear displacement sensor 24 is fixed between the measuring rod 21 and the micro head 22, and detects displacement of the movement of the sensor piece 4, and displays displacement data of the sensor piece 4 through the display unit 25.

The screw micrometer is made according to the principle of screw magnification, namely, the screw rod rotates in the nut for one circle, and the screw rod advances or retreats by a pitch distance along the direction of the rotation axis. Thus, a small distance of movement in the axial direction can be represented by a reading on the circumference. The pitch of the precise thread of the screw micrometer is 0.5mm, and the movable scale is provided with 50 equal-dividing scales.

The implementation principle of the distance test fixture for the sensor in embodiment 2 of the application is as follows: after the production of the distance sensor is completed, the distance sensor is placed on the fixed seat 2, the differential head 22 is rotated to drive the measuring rod 21 to move towards one side of the fixed seat 2, the differential head 22 is also called a spiral micrometer and is manufactured according to the principle of spiral amplification, the measuring rod 21 can be controlled to move only along the axial direction, the induction piece 4 is improved to move along the same axial direction, and the detection precision is improved. And the micrometer 20 is also provided with a linear displacement sensor 24 in a matching way, and the displacement of the sensing piece 4 can be detected by measuring the moving distance of the measuring rod 21 through the linear displacement sensor 24. According to the scheme, the induction piece 4 is driven to move towards one side of the fixed seat 2 through the rotating differential head 22, when the induction piece 4 enters the detection range of the distance sensor, the induction lamp of the distance sensor can be lightened, whether the distance sensor senses the detection, the moving distance of the induction piece 4 is monitored through the linear displacement sensor 24, and the measuring distance of the distance sensor can be obtained through the displacement data of the induction piece 4. The micrometer 20 is a digital display micrometer 20, which is beneficial to improving the measurement precision. Thereby improving the situation that the sensor testing device has difficulty in accurately measuring the distance of the sensor.

The above preferred embodiments are not limited in scope, and therefore: equivalent changes of structure, shape and principle should be covered in the protection scope.

Claims

1. The utility model provides a distance test tool for sensor, its characterized in that, including workstation (1), set up in on workstation (1) and be used for fixing base (2) of sensor, set up in on workstation (1) and with moving mechanism (3) that fixing base (2) are located same straight line, set up in moving mechanism (3) are close to sensing piece (4) of fixing base (2) one side, set up in on workstation (1) and be used for detecting testing machine (5) of the displacement of sensing piece (4), moving mechanism (3) are used for the drive sensing piece (4) towards fixing base (2) one side removes.

2. The distance testing jig for a sensor according to claim 1, wherein the moving mechanism (3) comprises a base (6) arranged on the workbench (1) and having one end fixed with the fixing base (2), a moving seat (7) arranged on the base (6) and used for placing the sensing piece (4), a sliding groove (8) arranged on one side of the base (6) close to the moving seat (7) and used for moving the moving seat (7), a guide rail (9) arranged on the base (6) and parallel to the length direction of the sliding groove (8), a moving hole (10) arranged on the moving seat (7) and used for the guide rail (9) to penetrate, and a driving piece arranged on the base (6) and used for driving the moving seat (7) to reciprocate along the length direction of the sliding groove (8).

3. The distance testing jig for a sensor according to claim 2, wherein the driving member is a screw rod (11), one end of the screw rod (11) is rotationally connected with the fixing seat (2), the other end of the screw rod (11) penetrates out of the base (6), the screw rod (11) is parallel to the guide rail (9), a driving hole (12) for the screw rod (11) to penetrate through is formed in the movable seat (7), and an internal thread for being in threaded connection with the screw rod (11) is arranged in the driving hole (12).

4. A distance testing jig for a sensor according to claim 3, wherein a rotating handle (13) is provided on a side of the screw rod (11) away from the fixing base (2).

5. The distance testing jig for a sensor according to claim 2, wherein the testing mechanism (5) comprises a grating displacement sensor (14) disposed on the workbench (1) and used for measuring the displacement of the sensing piece (4), and a display screen (15) disposed on the workbench (1) and electrically connected with the grating displacement sensor (14).

6. The distance test fixture for a sensor according to claim 5, wherein a sliding track (16) for sliding the grating displacement sensor (14) is arranged on the workbench (1), a linkage piece (17) is arranged on one side, close to the movable seat (7), of the grating displacement sensor (14), a fixed groove (18) for embedding the linkage piece (17) is arranged on one side, close to the linkage piece (17), of the movable seat (7), and the linkage piece (17) is fixed in the fixed groove (18).

7. The distance testing jig for a sensor according to claim 1, wherein the moving mechanism (3) comprises a fixing frame (19), a micrometer (20) arranged on the fixing frame (19), the micrometer (20) comprises a measuring rod (21) and a differential head (22) used for driving the measuring rod (21) to move, a through hole (23) for the measuring rod (21) to pass through is formed in the fixing frame (19), and the sensing piece (4) is arranged on one side, close to the fixing seat (2), of the measuring rod (21).

8. The distance testing jig for a sensor according to claim 7, wherein the testing mechanism (5) comprises a linear displacement sensor (24) provided between the measuring rod (21) and the micro head (22), and a display portion (25) provided on the linear displacement sensor (24).

9. The distance testing jig for a sensor according to claim 7, wherein said differential head (22) is provided with anti-skid patterns.