Sensor detection system

Abstract

The invention discloses a sensor detection system, which relates to the technical field of production of ultrasonic sensors, and comprises a sensor input mechanism arranged at a feed port, a sensor output mechanism arranged at a discharge port, a test box close to the sensor input mechanism, and a sensor positioning unit arranged on the side where the sensor output mechanism is located, the manipulator picks up the sensors on the sensor input mechanism to the positioning unit, picks up the qualified product sensors at the positioning unit to the sensor output mechanism or picks up the defective product sensors to the defective product arrangement area; the method has the advantages of high detection efficiency and accurate detection result.

Description

Technical Field

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

[0002] Ultrasonic sensors are widely used in automobiles. For example, the parking system of a car is equipped with a corresponding ultrasonic sensor. The working principle of an ultrasonic sensor is to emit ultrasonic waves through a transmitter. When the ultrasonic waves encounter an obstacle, they will be reflected back and then received by a receiver. By measuring the time difference between emission and reception, the distance to the target object can be calculated. The quality of the ultrasonic sensor will directly affect the accuracy of the measurement, and thus affect the overall parking effect. For this reason, ultrasonic sensors need to undergo corresponding performance testing before leaving the factory to avoid the outflow of unqualified products.

[0003] At present, the method for performing performance testing on ultrasonic sensors is to manually connect the wiring terminals of the test equipment to the wiring terminal blocks of the sensor one by one and then perform testing, and manually record or mark the test results. The test operation steps are many and the test time is long, and the test efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a sensor detection system with high detection result accuracy and high detection efficiency.

[0005] The present invention can be implemented by the following technical scheme: a sensor detection system, comprising a sensor input mechanism arranged at a material inlet, a sensor output mechanism arranged at a material outlet, a sensor positioning unit arranged on the side of a test box adjacent to the sensor input mechanism and the sensor output mechanism, a manipulator picking up a sensor on the sensor input mechanism to the positioning unit, picking up a sensor of a qualified product at the positioning unit to the sensor output mechanism, or picking up a sensor of a defective product to a defective product arrangement area;

[0006] A wiring terminal adapted to the wiring terminal seat of the sensor is arranged at the positioning unit, a moving target is arranged in the test box, and the moving target is driven by the driving mechanism to approach or move away from the sensor transceiver unit and the sensor transceiver unit faces the moving target.

[0007] Compared with the prior art, the present invention has a detection system that can complete the performance test of the sensor without human intervention, and has high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 , 2 It is a structural schematic diagram of the sensor to be tested;

[0009] Figure 3 A top view of the present invention;

[0010] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention;

[0011] Figure 5 It is a structural schematic diagram of the sensor input mechanism, the sensor output mechanism, and the test box in the present invention;

[0012] Figure 6 It is a structural schematic diagram of the sensor input mechanism or the sensor output mechanism in the present invention;

[0013] Figure 7 It is a schematic diagram of the internal structure of the test box in the present invention;

[0014] Figure 8 It is a structural schematic diagram of the positioning unit in the present invention;

[0015] Fig. 9 It is a schematic diagram of the structure of the robot in the present invention. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 3-9 As shown, a sensor detection system includes a sensor input mechanism 20A arranged at a material inlet 11, a sensor output mechanism 20B arranged at a material outlet 12, a positioning unit 31 of a sensor A arranged on a test box 30 adjacent to the sensor input mechanism 20A and the sensor output mechanism 20B, a manipulator 40 picks up the sensor A on the sensor input mechanism 20A to the positioning unit 31, picks up the sensor A of a qualified product at the positioning unit 31 to the sensor output mechanism 20B, or picks up the sensor A detected as a defective product to the defective product arrangement area 13; a terminal B adapted to the terminal block A4 of the sensor A is arranged at the positioning unit 31, a moving target object 32 is arranged in the test box 30, and the moving target object 32 is driven by a driving mechanism to approach or move away from the sensor transceiver unit A2 and the sensor transceiver unit A2 faces the moving target object 32.

[0018] In the above scheme, the sensor A to be tested is transported to the test box 30 by the sensor input mechanism 20A. After the sensor A is tested by the test box 30, the qualified sensor A is placed on the sensor output mechanism 20B and output by the sensor output mechanism 20B, and the unqualified sensor A is placed in the defective product arrangement area 13. The sensor performance detection process is completed by the detection system provided by the present application, which significantly improves the detection efficiency. By setting the positioning unit 31, the sensor A to be tested is accurately fixed at the detection position, ensuring that the terminal B is accurately plugged into the terminal seat A4 of the sensor A, thereby also ensuring the detection effect of the sensor A.

[0019] During the specific work, a worker can place the tray 22 containing the sensor A to be tested at the entrance end of the sensor input mechanism 20A. The sensor A to be tested enters a position close to the test box 30 under the transportation of the sensor input mechanism 20A. At this time, the robot 40 will pick up the sensor A to be tested on the sensor input mechanism 20A and put it into the positioning unit 31, so that the sensor transceiver unit A2 faces the moving target 32 ​​inside the test box 30, and the cylinder at the positioning unit is used to push the terminal B to insert it into the terminal seat A4 of the sensor A to be tested. At this time, the test software can detect the sensor A to be tested. After the detection is completed, the qualified sensor A will be picked up by the robot 40 and placed on the tray 22 on the sensor output mechanism 20B, and then output from the discharge port 12 with the sensor output mechanism 20B; the unqualified sensor A will be picked up by the robot 40 and placed in the defective product arrangement area 13. When the tray 22 in the defective product arrangement area 13 is full of sensors A, it can be taken out by a worker, and the detection process of the sensor A is completed.

[0020] Preferably, the sensor input mechanism 20A and the sensor output mechanism 20B are arranged in the forward direction, and the sensor input mechanism 20A and the sensor output mechanism 20B are arranged in two groups at left and right intervals, and the manipulator 40 is arranged between the two groups of sensor input mechanisms 20A and sensor output mechanisms 20B, and each group of sensor input mechanisms 20A and sensor output mechanisms 20B is provided with a corresponding test box 30, and the area between the two test boxes 30 is arranged with the sensor input mechanism 20A, the sensor output mechanism 20B and the manipulator 40; when working, when the manipulator 40 picks up a sensor A from the sensor input mechanism 20A and puts it into a test box 3 0, the sensor A at the positioning unit 31 on the other test box 30 will be in the detection completed state. At this time, the robot 40 can remove the sensor A on the test box 30 and put it on the sensor output mechanism 20B or the defective product arrangement area 13. This arrangement allows the robot 40 to work continuously and reciprocatingly, and reasonably utilizes the time for the test software to detect one sensor A to install another sensor A to be tested on the other positioning unit 31, so that the detection process of the sensors A to be tested at the positioning units 31 on the two test boxes 30 is alternately performed, thereby further improving the detection efficiency.

[0021] Further, such as Figure 8 As shown, the positioning unit 31 includes a through hole 311 arranged on the side wall of the test box 30 for the sensor housing A1 to be placed therein, and two positioning blocks 312 are arranged on the outer wall of the test box 30 adjacent to the through hole 311, and the opposite side surfaces 3121 of the two positioning blocks 312 are parallel to each other and the mirror-symmetric center planes of the two side surfaces 3121 pass through the hole core of the through hole 311, and the spacing between the two side surfaces 3121 coincides with the spacing between the seat surfaces A41 on the terminal block A4 parallel to the extension direction of the sensor housing A1; when the sensor A is tested, the suction cup 41 on the manipulator 40 sucks the sensor A at the position of the packaging glue plugging cover A3, and the manipulator inserts the sensor housing A1 into the through hole 311, and the terminal block A4 is arranged between the opposite side surfaces 3121 of the two positioning blocks 312, and at this time, the position and posture of the sensor housing A1 and the terminal block A4 are basically determined.

[0022] like Figure 8As shown, two opening and closing clamping rods 313 are arranged at the edge of the through hole 311, and the opening and closing directions of the two clamping rods 313 are in a mutually staggered avoidance position with the two positioning blocks 312; the wiring terminal B electrically connected to the detection instrument is arranged at one end of the two positioning blocks 312 away from the through hole 311, and the wiring terminal B is connected to the linear displacement driving unit 314, and the linear displacement driving unit 314 drives the wiring terminal B to move to the detection position for plugging and matching with the wiring terminal seat A4 or the separation position for disengaging from the plugging; when the sensor housing A1 is inserted into the through hole 311, the wiring terminal seat A4 is After being arranged between the opposite sides 3121 of the two positioning blocks 312, the sensor housing A1 is constrained and fixed by means of two clamping rods 313 when they approach each other in the radial direction of the through hole 311. At this time, the socket hole of the terminal block A4 is directly 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 314 drives the terminal B to be smoothly inserted from the orifice of the socket hole of the terminal block A4. When the test signal connected to the terminal B is turned on, the quality and performance of the sensor A can be tested.

[0023] In the positioning scheme of the sensor A to be tested by the above-mentioned positioning unit 31, in order to facilitate the insertion of the sensor housing A1 into the through hole 311, the inner diameter of the through hole 311 is slightly larger than the outer diameter of the sensor housing A1. Therefore, when the sensor housing A1 is inserted into the through hole 311 and the terminal block A4 is arranged between the opposite sides 3121 of the two positioning blocks 312, the sensor A may be offset in the direction perpendicular to the side wall of the test box 30. In this state, the sensor A cannot ensure that the displacement direction of the terminal B is consistent with the core direction of the seat hole of the terminal block A4. Therefore, the sensor A needs to be further limited. At this time, the sensor housing A1 needs to be further fixed by two clamping rods 313. When the two clamping rods 313 approach each other in the radial direction of the through hole 311, since the rod surfaces on the opposite sides of the two clamping rods 313 are curved surfaces that match the sensor housing A1, when When the two clamping rods 313 contact the upper and lower sides of the sensor housing A1 respectively, they have a straightening effect on the sensor housing A1, so that the surface of the sensor housing A1 and the corresponding positions of the inner wall of the through hole 311 are in a parallel state. On the one hand, the sensor A is fixed on the side wall of the test box 30, 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 hole 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 314, 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.

[0024] like Figure 8As shown, two positioning blocks 312 are arranged on the left side of the through hole 311, and the opening and closing directions of the two clamping rods 313 are located in the upper and lower directions of the through hole 311; the through hole 311 is a circular hole, and the upper and lower hole edges of the through hole 311 are respectively provided with upper and lower strip holes 311a and 311b extending upward and downward, and the rod surfaces on the opposite sides of the clamping rods 313 are curved surfaces that match the sensor housing A1, and the two clamping rods 313 are respectively displaced up and down in the upper and lower strip holes 311a and 311b, and the two clamping rods 313 are respectively connected to the driving mechanism 315 via a bent transition rod, and the driving mechanism 315 drives the two clamping rods 313 to move closer to or away from each other; the circular through hole 311 is adapted to the outer peripheral contour of the sensor housing A1; located in the upper and lower strip holes 311a and 311b The clamping rods 313 respectively clamp the sensor housing A1 in the through hole 311, and the clamping parts of the two clamping rods 313 are the upper and lower sides of the sensor housing A1. The transition rods located outside the upper and lower strip holes 311a and 311b will clamp the sensor housing A1 outside the through hole 311, and the clamping parts of the two transition rods 411 are the upper and lower parts on the right side of the sensor housing A1. The coordinated use of the clamping rods 313 and the transition rods, on the one hand, avoids the interference of the clamping rods 313 with the raised parts on the surface of the sensor housing A1, and on the other hand, while reducing the clamping area of ​​the sensor housing A1, it can also ensure the stability of the sensor housing A1. When the linear displacement drive unit 314 pushes the terminal B into the terminal seat A4, it avoids the sensor housing A1 from shifting to the right.

[0025] Among the above, Figure 8 As shown, the linear displacement driving unit 314 is a linear cylinder and the rod end of its piston rod is connected with a push plate, and the terminal B is installed on the plate surface of the push plate facing the position of the two positioning blocks 312; the setting of the push plate can limit the transition of the terminal B into the terminal block A4, avoid damage to the pins of the sensor A to be detected, and ensure the accuracy of the plugging of the pinholes of the wiring harness terminals of the detection equipment with the pins of the sensor A to be detected and the reliability of the electrical connection; the driving mechanism 315 is a double piston rod cylinder, and the two transition rods are respectively connected to the two piston rods of the double piston rod cylinder, and the two piston rods of the double piston rod cylinder drive the transition rod and the clamp rod 313 to move closer or separate in the up and down directions. In order to further limit the sensor housing A1 from deviating to the right during the process of the linear displacement driving unit 314 driving the terminal B to insert into the terminal block A4, a limit block is arranged on the side wall of the test box 30 near the right side of the through hole 311, and the limit surface on the limit block is an arc surface and faces the side where the hole area of ​​the through hole 311 is located.

[0026] Preferably, Figure 7As shown, the moving target 32 ​​is a straight rod, which is arranged vertically on the bottom of the test box 30, and the core of the straight rod is coplanar with the core of the through hole 311; in a specific implementation, the projection of the straight rod on the surface where the through hole 311 is located covers the through hole 311, and the straight rod is driven by a driving mechanism (such as a cylinder) to move in a direction close to or away from the sensor transceiver unit A2. The sensor transceiver unit A2 receives the ultrasonic signal reflected by the straight rod, and then calculates the distance between the sensor A and the straight rod; by changing the distance between the sensor A and the straight rod to simulate the actual working conditions of the vehicle movement such as reversing, the accuracy of the test results of the sensor A can be improved.

[0027] like Figure 7 As shown, the inner walls of the test box 30 are provided with sound-absorbing cotton 33; the sound-absorbing cotton 33 is used to shield the test box 30 from absorbing the ultrasonic signal of the sensor A to avoid misdetection by the sensor A; the surface of the moving target 32 ​​is not blocked by the sound-absorbing cotton 33 and can reflect the ultrasonic wave emitted by the sensor transceiver unit A2.

[0028] Preferably, Figure 6 As shown, the sensor input mechanism 20A and the sensor output mechanism 20B both include a displacement plate 21 driven by a cylinder for displacement, and a tray 22 for loading the sensor A is arranged on the displacement plate 21; a loading slot 221 is opened on the tray 22, and when the sensor A is inserted into the loading slot 221, the packaging glue plugging cover A3 faces upward; the tray 22 and the displacement plate 21 are in a detachable connection, which is convenient for workers to put the loaded tray on the sensor input mechanism 20A and the sensor output mechanism 20B, and the loading slot 221 on the tray 22 is adapted to the external shape of the sensor A to be tested, and the posture of the sensor A to be tested is maintained with the packaging glue plugging cover A3 facing upward, thereby facilitating the robot 40 to pick up.

[0029] Preferably, Fig. 9 As shown, two vacuum suction cups 41 for alternating use are arranged on the grasping part of the manipulator 40, and the adsorption surface of the vacuum suction cup 41 is adapted to the shape of the packaging glue plugging cover A3, and the two vacuum suction cups 41 are respectively driven by the cylinder to move to the packaging glue plugging cover A3 to adsorb the sensor A; by arranging two vacuum suction cups 41 on the grasping part of the manipulator 40, after the manipulator 40 picks up the sensor A that has been inspected on a test box 30, it is not necessary to immediately place it into the sensor output mechanism 20B or the defective product arrangement area 13, but directly places the sensor A to be tested on the other vacuum suction cup 41 into the through hole 311, thereby reducing the steps of separate material picking and separate material placing, and reducing the time interval for two adjacent sensors A to be tested to enter the positioning unit 31 for detection, which is beneficial to further improve the detection efficiency of the sensor A.

Claims

1. A sensor detection system, characterized in that: The invention comprises a sensor input mechanism (20A) arranged at the material inlet (11), a sensor output mechanism (20B) arranged at the material outlet (12), a positioning unit (31) of the sensor (A) arranged on the side of the test box (30) adjacent to the sensor input mechanism (20A) and the sensor output mechanism (20B), and a manipulator (40) picking up the sensor (A) on the sensor input mechanism (20A) to the positioning unit (31), picking up the sensor (A) of a qualified product at the positioning unit (31) to the sensor output mechanism (20B), or picking up the sensor (A) detected as a defective product to the defective product arrangement area (13); A wiring terminal (B) adapted to a wiring terminal seat (A4) of a sensor (A) is arranged at the positioning unit (31), a moving target (32) is arranged in the test box (30), and the moving target (32) is driven by a driving mechanism to approach or move away from the sensor transceiver unit (A2), and the sensor transceiver unit (A2) faces the moving target (32).

2. The sensor detection system according to claim 1, characterized in that: The sensor input mechanism (20A) and the sensor output mechanism (20B) are arranged in a forward direction, two groups of the sensor input mechanism (20A) and the sensor output mechanism (20B) are arranged at intervals on the left and right, a manipulator (40) is arranged between the two groups of the sensor input mechanism (20A) and the sensor output mechanism (20B), one test box (30) is provided corresponding to each group of the sensor input mechanism (20A) and the sensor output mechanism (20B), and the sensor input mechanism (20A), the sensor output mechanism (20B) and the manipulator (40) are arranged in the area between the two test boxes (30).

3. The sensor detection system according to claim 1 or 2, characterized in that: The positioning unit (31) comprises a through hole (311) arranged on the side wall of the test box (30) for the sensor housing (A1) to be placed therein, two positioning blocks (312) are arranged on the outer wall of the test box (30) adjacent to the through hole (311), the opposite side surfaces (3121) of the two positioning blocks (312) are parallel to each other, and the mirror-symmetric center planes of the two side surfaces (3121) pass through the hole core of the through hole (311), and the spacing between the two side surfaces (3121) matches the spacing between the seat surfaces (A41) on the wiring terminal seat (A4) parallel to the extension direction of the sensor housing (A1).

4. The sensor detection system according to claim 3, characterized in that: Two opening and closing clamping rods (313) are arranged at the edge of the through hole (311), and the opening and closing directions of the two clamping rods (313) and the two positioning blocks (312) are in mutually staggered avoidance positions; a wiring terminal (B) electrically connected to the detection instrument is arranged at one end of the two positioning blocks (312) away from the through hole (311), and the wiring terminal (B) is connected to a linear displacement drive unit (314), and the linear displacement drive unit (314) 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 plugging.

5. The sensor detection system according to claim 4, 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); the through hole (311) is a circular hole, and the upper and lower hole edges of the through hole (311) are respectively provided with upper and lower strip holes (311a, 311b) extending upward and downward, and the rod surface on the opposite side of the clamping rod (313) is a curved surface that matches the sensor housing (A1), and the two clamping rods (313) are respectively displaced up and down in the upper and lower strip holes (311a, 311b), and the two clamping rods (313) are respectively connected to the driving mechanism (315) via a bent transition rod, and the driving mechanism (315) drives the two clamping rods (313) to move closer to or away from each other.

6. The sensor detection system according to claim 1 or 2, characterized in that: The moving target object (32) is a straight rod, which is arranged vertically on the bottom of the test box (30), and the core of the straight rod is coplanar with the core of the through hole (311).

7. The sensor detection system according to claim 6, characterized in that: The inner walls of the test box (30) are all provided with sound-absorbing cotton (33).

8. The sensor detection system according to claim 1 or 2, characterized in that: The sensor input mechanism (20A) and the sensor output mechanism (20B) both include a displacement plate (21) driven by a cylinder to perform displacement, and a tray (22) for loading the sensor (A) is arranged on the displacement plate (21).

9. The sensor detection system according to claim 8, characterized in that: A loading slot (221) is provided on the tray (22), and when the sensor (A) is inserted into the loading slot (221), the packaging rubber plugging cover (A3) faces upward.

10. The sensor detection system according to claim 2, characterized in that: Two alternately used vacuum suction cups (41) are arranged on the grasping part of the manipulator (40); the suction surface of the vacuum suction cup (41) is matched with the shape of the packaging glue plugging cover (A3); the two vacuum suction cups (41) are respectively driven by the cylinder to move to the packaging glue plugging cover (A3) to adsorb the sensor (A).

Images