Sensor test tooling

Abstract

The invention discloses a sensor testing tool, which relates to the technical field of production of ultrasonic sensors. Two positioning blocks are arranged on the front panel surface of a frame plate adjacent to a through hole, and the spacing between the two side surfaces matches the spacing between the seat surfaces on a wiring terminal seat parallel to the extension direction of a sensor housing; two opening and closing clamping rods are arranged at the hole edge of the through hole, and a linear displacement driving unit drives the wiring terminal to move to a detection position for plugging and matching with the wiring terminal seat or a separation position for disengaging from the plugging; the accuracy of plugging between the pinhole of the wiring harness terminal of the detection equipment and the pin of the sensor to be detected and the reliability of the electrical connection are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of production of ultrasonic sensors, in particular to a sensor testing tool. Background Art

[0002] Ultrasonic sensors can measure the distance between themselves and the target object and are widely used in automobiles. The quality of ultrasonic sensors will directly affect the accuracy of the measurement. For this reason, ultrasonic sensors need to undergo performance testing before leaving the factory. When performing the performance testing of the sensor, the terminals of the test equipment need to be plugged into the sensor terminal block, and the terminals of the test equipment and the terminals of the sensor need to be electrically connected.

[0003] The test scheme adopted in the prior art is to perform detection in a manual operation mode, that is, the operator holds the wiring terminal of the test equipment with one hand and the sensor housing to be tested with the other hand, and plugs the wiring terminals of the two into each other. Both the accuracy of the connection between the pinholes and the pins of the wiring terminals and the reliability of the plugging depth are difficult to control, thereby causing the phenomenon of pin bending or poor contact to be difficult to avoid, which seriously affects the efficiency and accuracy of the detection. Summary of the invention

[0004] The object of the present invention is to provide a sensor testing tool to ensure the accuracy of the plugging of the pinholes of the wiring harness terminals of the testing equipment with the pins of the sensor to be tested and the reliability of the electrical connection.

[0005] The present invention can be implemented through the following technical scheme: a sensor testing tool, a rack plate with a vertical surface is provided with a through hole for inserting a sensor shell; two positioning blocks are arranged on the front panel surface of the rack plate adjacent to the through hole, the opposite side surfaces of the two positioning blocks are parallel to each other and the mirror-symmetrical center planes of the two side surfaces pass through the hole core of the through hole, and the spacing between the two side surfaces coincides with the spacing between the seat surfaces on the terminal block that are parallel to the extension direction of the sensor shell; two opening and closing clamping rods are provided at the hole edge of the through hole, and the opening and closing directions of the two clamping rods are in mutually staggered avoidance positions with the two positioning blocks; the ends of the two positioning blocks away from the through hole are provided with wiring terminals electrically connected to the detection instrument, the wiring terminals are connected to a linear displacement drive unit, and the linear displacement drive unit drives the wiring terminals to move to a detection position for plugging and matching with the wiring terminal block or a separation position for disengaging from the plug.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] The posture of the sensor is initially positioned through the through hole and two positioning blocks, and the sensor is then fixed with the help of two clamping rods, so that the wiring terminal is directly opposite to the wiring terminal seat on the one hand, and on the other hand, the displacement direction of the wiring terminal is ensured to be consistent with the hole core direction of the seat hole of the wiring terminal seat. This ensures the smooth plugging of the wiring terminal and the wiring terminal seat, providing a guarantee for the functional detection of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 , Figure 2 It is a structural schematic diagram of the sensor in the present invention;

[0009] Figure 3 It is a schematic diagram of the overall structural connection of the present invention;

[0010] Figure 4 It is a structural schematic diagram of the wiring terminal and the wiring terminal seat in the present invention when they are assembled in place;

[0011] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping rod in the present invention;

[0012] Figure 6 It is a schematic diagram of the top view of the clamping rod in the present invention;

[0013] Figure 7 It is a schematic diagram of the three-dimensional structure of the limiting block in the present invention. DETAILED DESCRIPTION

[0014] See also Figure 1-2 As shown, in order to better illustrate the present invention, a brief description is first given of the basic structure of the sensor: the sensor A includes a sensor housing A1 which is cylindrical as a whole, the sensor transceiver unit A2 is arranged at the front cavity end of the sensor housing A1, the rear end of the sensor housing A1 is a packaging rubber plugging cover A3, the rear section of the sensor housing A1 is connected to a tubular terminal seat A4, and the terminal seat A4 has a seat surface A41 parallel to the extension direction of the sensor housing A1, and the two seat surfaces A41 on opposite sides are parallel to each other.

[0015] See also Figure 3-7As shown, a sensor testing tool is provided on a frame plate 10 with a vertical surface, and a through hole 11 for inserting a sensor housing A1 is provided; two positioning blocks 20 are arranged on the front panel surface of the frame plate 10 near the through hole 11, and the opposite side surfaces 21 of the two positioning blocks 20 are parallel to each other and the mirror-symmetric center planes of the two side surfaces 21 pass through the hole core of the through hole 11, and the spacing between the two side surfaces 21 coincides with the spacing between the seat surfaces A41 on the terminal block A4 parallel to the extension direction of the sensor housing A1; two opening and closing clamping rods 41 are provided at the edge of the through hole 11, and the opening and closing directions of the two clamping rods 41 are in a mutually staggered avoidance position with the two positioning blocks 20; the ends of the two positioning blocks 20 away from the through hole 11 are provided with a terminal B electrically connected to a detection instrument, and the terminal B is connected to a linear displacement drive unit 30, and the linear displacement drive unit 30 drives the terminal B to move to a detection position for plugging with the terminal block A4 or a separation position for disengaging from the plug.

[0016] When testing sensor A, the suction cup on the manipulator sucks sensor A at the position of the packaging glue plugging cover A3, and the manipulator inserts the sensor housing A1 into the through hole 11. The terminal block A4 is arranged between the opposite sides 21 of the two positioning blocks 20. At this time, the position and posture of the sensor housing A1 and the terminal block A4 are basically determined. With the help of two clamping rods 41, the sensor housing A1 is constrained and fixed when they approach each other in the radial direction of the through hole 11. At this time, the socket hole of the terminal block A4 is opposite to the terminal B, and the displacement direction of the terminal B is consistent with the hole core direction of the seat hole of the terminal block A4. The linear displacement drive unit 30 drives the terminal B to be smoothly inserted from the orifice of the socket hole of the terminal block A4. The test signal connected to the terminal B is connected to test the quality and performance of the sensor A.

[0017] In the above scheme, in order to facilitate the insertion of the sensor housing A1 into the through hole 11, the inner diameter of the through hole 11 is slightly larger than the outer diameter of the sensor housing A1. Therefore, when the sensor housing A1 is inserted into the through hole 11 and the terminal seat A4 is arranged between the two opposite sides 21 of the positioning blocks 20, the sensor A may be offset in the direction perpendicular to the board surface of the rack plate 10. In this state, the sensor A cannot ensure that the displacement direction of the terminal B is consistent with the hole core direction of the seat hole of the terminal seat A4. Therefore, it is necessary to further limit the sensor A. At this time, it is necessary to further fix the sensor housing A1 through two clamping rods 41. When the two clamping rods 41 approach each other in the radial direction of the through hole 11, since the rod surfaces on the opposite sides of the two clamping rods 41 are curved surfaces that match the sensor housing A1, when the two clamping rods 41 When contacting the upper and lower sides of the sensor housing A1 respectively, it has a straightening effect on the sensor housing A1, so that the sensor housing A1 is completely perpendicular to the surface of the frame plate 10. On the one hand, the sensor A is fixed on the frame plate 10, and the sensor A will not become loose due to the vibration of the frame. On the other hand, the displacement direction of the terminal B is consistent with the core direction of the seat hole of the terminal block A4, ensuring that the terminal B can be accurately inserted into the terminal block A4 under the drive of the linear displacement drive unit 30, ensuring the accuracy of the connection between the pinhole of the wiring harness terminal of the detection equipment and the pin of the sensor A to be detected and the reliability of the electrical connection; such a detection method not only avoids the detection error caused by manually plugging the terminal of the detection instrument into the sensor terminal block in the prior art, but also significantly improves the detection efficiency.

[0018] Preferably, two positioning blocks 20 are arranged on the left side of the through hole 11, and the opening and closing directions of the two clamping rods 41 are located in the up and down directions of the through hole 11; after the sensor A is positioned on the frame plate 10, the terminal block A4 is located on the left side of the sensor housing A1, and the two positioning blocks 20 are staggered from the driving mechanism 40 for driving the two clamping rods 41 to move, thereby ensuring the normal operation of the linear displacement driving unit 30 and the driving mechanism 40.

[0019] Furthermore, the through hole 11 is a circular hole, and the upper and lower hole edges of the through hole 11 are respectively provided with upper and lower strip holes 11a and 11b extending upward and downward, and the rod surface on the opposite side of the clamp rod 41 is a curved surface that matches the sensor housing A1. The two clamp rods 41 move up and down in the upper and lower strip holes 11a and 11b respectively, and the clamp rod 41 is connected to the driving mechanism 40 via a bent transition rod 411, and the driving mechanism 40 drives the two clamp rods 41 to move closer to or away from each other; the circular hole-shaped through hole 11 is adapted to the outer peripheral contour of the sensor housing A1, and the inner diameter of the through hole 11 is slightly larger than the outer diameter of the sensor housing A1, so as to facilitate the insertion of the sensor housing A1; the upper and lower strip holes 11a and 11b are provided at the bottom of the through hole 11, and the inner diameter of the through hole 11 is slightly larger than the outer diameter of the sensor housing A1, so as to facilitate the insertion of the sensor housing A1; The clamping rods 41 in 1a and 11b respectively clamp the sensor housing A1 in the through hole 11, and the clamping parts of the two clamping rods 41 are the upper and lower sides of the sensor housing A1. The transition rod 411 located outside the upper and lower strip holes 11a and 11b will clamp the sensor housing A1 outside the through hole 11, and the clamping parts of the two transition rods 411 are the upper and lower parts of the right side of the sensor housing A1. The coordinated use of the clamping rod 41 and the transition rod 411 can reduce the clamping area of ​​the sensor housing A1 while ensuring the stability of the sensor housing A1. When the linear displacement drive unit 30 pushes the terminal B into the terminal seat A4, the sensor housing A1 is prevented from shifting to the right.

[0020] Preferably, the linear displacement drive unit 30 is a cylinder and the rod end of its piston rod 31 is connected to a push plate 32, and the terminal B is installed on the board surface of the push plate 32 facing the two positioning blocks 20; the setting of the push plate 32 facilitates the installation of the terminal B. When the terminal B is fully inserted into the terminal seat A4, the open side of the terminal seat A4 contacts the board surface of the push plate 32, which can limit the terminal B from continuing to move in the direction of entering the terminal seat A4, avoiding damage to the pins of the sensor A to be detected, and also ensuring the accuracy of the connection between the pinholes of the wiring harness terminals of the detection equipment and the pins of the sensor A to be detected and the reliability of the electrical connection.

[0021] Furthermore, a limit block 50 for limiting the horizontal linear displacement of the sensor A is arranged on the right side of the through hole 11 on the front panel surface of the frame plate 10, and the limit surface 51 on the limit block 50 is an arc surface and faces the side where the hole area of ​​the through hole 11 is located; since the inner diameter of the through hole 11 is slightly larger than the outer diameter of the sensor housing A1, when the sensor housing A1 is just inserted into the through hole 11, the right side surface of the sensor housing A1 does not abut on the limit surface 51, and the two clamping rods 41 approach each other in the radial direction of the through hole 11, so that the right side surface of the sensor housing A1 abuts on the limit surface 51, so as to limit the sensor housing A1 from deviating to the right during the process of the linear displacement driving unit 30 driving the terminal B to insert the terminal block A4.

[0022] Preferably, the driving mechanism 40 is a double-piston rod cylinder 42 installed on the front panel surface of the frame plate 10, the two transition rods 411 are respectively connected to the two piston rods of the double-piston rod cylinder 42, and the two piston rods of the double-piston rod cylinder 31 drive the transition rod 411 and the clamping rod 41 to move closer or apart in the up and down directions; the double-piston rod cylinder 42 is located on the right side of the through hole 11 and will not interfere with the linear displacement drive unit 30.

[0023] Furthermore, the two bent transition rods 411 are angular rods, and the end of the first rod segment 411a of the transition rod 411 perpendicular to the surface of the frame plate 10 is connected to the clamping rod 41, and the end of the second rod segment 411b of the transition rod 411 parallel to the surface of the frame plate 10 is connected to the piston rod of the double-piston rod cylinder 42; the rod surfaces on the opposite sides of the two first rod segments 411a are curved surfaces that match the sensor housing A1, and the clamping parts of the two first rod segments 411a are the upper and lower parts of the right side surface of the sensor housing A1, so as to limit the sensor housing A1 from deviating to the right during the process of the linear displacement drive unit 30 driving the terminal B to insert into the terminal seat A4; the two second rod segments 411b are used to realize the connection between the transition rod 411 and the piston rod of the double-piston rod cylinder 42.

Claims

1. A sensor testing tool, characterized in that: A through hole (11) for inserting a sensor housing (A1) is provided on a frame plate (10) disposed upright on the plate surface; two positioning blocks (20) are arranged on the front plate surface of the frame plate (10) adjacent to the through hole (11); the opposite side surfaces (21) of the two positioning blocks (20) are parallel to each other, and the mirror-symmetric center planes of the two side surfaces (21) pass through the hole core of the through hole (11); the spacing between the two side surfaces (21) matches the spacing between the seat surfaces (A41) on the wiring terminal seat (A4) parallel to the extension direction of the sensor housing (A1) Two opening and closing clamping rods (41) are arranged at the edge of the through hole (11), and the opening and closing directions of the two clamping rods (41) and the two positioning blocks (20) are in a mutually offset avoidance position; the two positioning blocks (20) are provided with a wiring terminal (B) electrically connected to the detection instrument at one end away from the through hole (11), and the wiring terminal (B) is connected to the linear displacement drive unit (30), and the linear displacement drive unit (30) drives the wiring terminal (B) to move to a detection position for plugging and matching with the wiring terminal seat (A4) or a separation position for disengaging from the plugging.

2. The sensor testing tool according to claim 1, characterized in that: Two positioning blocks (20) are arranged on the left side of the through hole (11), and the opening and closing directions of the two clamping rods (41) are located in the upper and lower directions of the through hole (11).

3. The sensor testing tool according to claim 1 or 2, characterized in that: The through hole (11) is a circular hole, and the upper and lower hole edges of the through hole (11) are respectively provided with upper and lower strip holes (11a, 11b) extending upward and downward, and the rod surface on the opposite side of the clamp rod (41) is a curved surface that matches the sensor housing (A1). The two clamp rods (41) are respectively displaced up and down in the upper and lower strip holes (11a, 11b), and the clamp rods (41) are connected to the driving mechanism (40) via a bent transition rod (411), and the driving mechanism (40) drives the two clamp rods (41) to move closer to or away from each other.

4. The sensor testing tool according to claim 1, characterized in that: The linear displacement drive unit (30) is a cylinder and the rod end of its piston rod (31) is connected to a push plate (32). The wiring terminal (B) is installed on the plate surface of the push plate (32) facing the positions of the two positioning blocks (20).

5. The sensor testing tool according to claim 2, characterized in that: A limit block (50) for limiting the horizontal linear displacement of the sensor (A) is arranged on the right side of the front panel surface of the frame plate (10) adjacent to the through hole (11); the limit surface (51) on the limit block (50) is an arc surface and faces the side where the hole area of ​​the through hole (11) is located.

6. The sensor testing tool according to claim 3, characterized in that: The driving mechanism (40) is a double piston rod cylinder (42) installed on the front panel surface of the frame plate (10), and the two transition rods (411) are respectively connected to the two piston rods of the double piston rod cylinder (42), and the two piston rods of the double piston rod cylinder (31) drive the transition rod (411) and the clamping rod (41) to move closer or apart in the up and down directions.

7. The sensor testing tool according to claim 6, characterized in that: The two bent transition rods (411) are angular rods, the end of a first rod section (411a) of the transition rod (411) perpendicular to the surface of the frame plate (10) is connected to the clamping rod (41), and the end of a second rod section (411b) of the transition rod (411) parallel to the surface of the frame plate (10) is connected to the piston rod of the double piston rod cylinder (42).

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