Rainfall and illumination sensor finished product test system

Abstract

The utility model relates to a rainfall illumination sensor finished product test system, comprising an industrial control host which is respectively in communication connection with a light source controller and a PLC controller and is used for sending a control instruction to the light source controller and the PLC controller; the light source controller is electrically connected with the light source; the light source is used for providing illumination for the rainfall illumination sensor finished product in an all-black environment; the PLC is electrically connected with the sliding assembly. The sliding assembly is connected with the water spraying assembly and the air blowing assembly. The PLC is electrically connected with the water spraying assembly; the PLC is electrically connected with the blowing assembly; the industrial control host is in communication connection with the rainfall illumination sensor finished product. According to the utility model, the function test of the rainfall illumination sensor finished product is realized, the use reliability of the product is ensured, and the driving safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of rainfall and light intensity sensors, and in particular to a testing system for finished rainfall and light intensity sensors. Background Technology

[0002] Rain and light sensors are typically installed in cars to automatically turn on headlights and windshield wipers, providing convenience for drivers in low-light and rainy conditions, preventing driver distraction, and improving driving safety.

[0003] The finished rain and light sensor includes an optical element (i.e., a shield), a microcontroller (MCU), an infrared assembly (including a transmitter and a receiver), and a photodiode. The optical element is located around the infrared assembly and photodiode. The area corresponding to the infrared assembly is typically brown and purple to shield infrared light from the outside environment, while the area corresponding to the photodiode is typically transparent to receive ambient light. The microcontroller selects the wiper settings based on the infrared intensity detected by the infrared assembly and selects the headlight settings based on the voltage across the photodiode. To ensure the finished rain and light sensor can accurately set the wiper and headlight settings after leaving the factory, it needs to undergo conformance testing before shipment. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a testing system for finished rain and light sensors.

[0005] The utility model adopts the following technical solutions:

[0006] A testing system for a finished rain and light sensor includes: an industrial control host, a light source controller, a light source, a finished rain and light sensor, a PLC controller, a sliding assembly, a water spray assembly, and an air blowing assembly; wherein:

[0007] The industrial control host is connected to the light source controller and the PLC controller for communication, and is used to send control commands to the light source controller and the PLC controller.

[0008] The light source controller is electrically connected to the light source and is used to adjust the brightness of the light source according to the control commands sent by the industrial control host.

[0009] The light source is used to provide illumination for the finished rain gauge sensor in a completely dark environment;

[0010] The PLC controller is electrically connected to the sliding component and is used to control the sliding of the sliding component.

[0011] The sliding component is connected to the water spray component and the air blowing component respectively, and is used to move the water spray component and the air blowing component above the finished rain light sensor during the rain test, and to move the water spray component and the air blowing component away from the finished rain light sensor after the rain test.

[0012] The PLC controller is electrically connected to the water spray assembly and is used to control whether the water spray assembly sprays water and the amount of water sprayed.

[0013] The PLC controller is electrically connected to the air blowing assembly and is used to control whether the air blowing assembly blows air.

[0014] The industrial control host is connected to the finished rain and light sensor to receive messages sent by the finished rain and light sensor during light illumination testing, which include the voltage value across the photodiode and the vehicle light status value, and messages sent by the finished rain and light sensor during rain measurement testing, which include the infrared intensity value received by the infrared component and the wiper status value. The host then determines whether the sensor is qualified based on the messages.

[0015] Furthermore, the industrial control host and the light source controller are connected via RS232.

[0016] Furthermore, the industrial control host and the PLC controller are connected via Ethernet.

[0017] Furthermore, the industrial control host and the finished rain and light sensor are connected via CAN bus or LIN bus.

[0018] Furthermore, it also includes a black box, a straight-line accordion cover, a first cylinder, and a first solenoid valve;

[0019] The input terminal of the first solenoid valve is electrically connected to the PLC controller, and the output terminal of the first solenoid valve is electrically connected to the first cylinder.

[0020] The piston of the first cylinder is connected to a straight-line organ cover, which is used to control the opening and closing of the straight-line organ cover;

[0021] The black box is a sealed structure with an opening and is light-proof. The light source and the finished rain and light sensor are installed inside the black box.

[0022] A straight accordion cover is installed at the opening of the black box to open or close the opening according to the control of the first cylinder.

[0023] Furthermore, the sliding assembly includes a second cylinder and a slide rail. The fixed end of the slide rail is fixedly connected to the black box, and the sliding end is connected to the piston of the second cylinder. The second cylinder is electrically connected to the PLC controller.

[0024] Furthermore, the water spray assembly includes a water tank, a water pump, and a water spraying device; the water pump is electrically connected to the PLC controller and is used to draw water from the water tank and deliver it to the water spraying device after receiving the control signal sent by the PLC controller; the water spraying device is fixedly connected to the sliding end of the slide rail.

[0025] Furthermore, the jet assembly includes an airbag, a second solenoid valve, and an air blowing device; the second solenoid valve is electrically connected to the PLC controller and is used to draw air from the airbag and deliver it to the air blowing device after receiving a control signal sent by the PLC controller; the air blowing device is fixedly connected to the sliding end of the slide rail.

[0026] Furthermore, it also includes a water collection trough located below the finished rain and light sensor, with a water outlet pipe connected to the bottom of the trough and the other end of the water outlet pipe connected to a water tank so that the water in the trough flows into the water tank.

[0027] Furthermore, the infrared component includes two components, which are respectively disposed on both sides of the photodiode; the water spray component and the air blowing component each include two components, with one water spray component and one air blowing component forming a group, used to spray water and blow air onto one infrared component.

[0028] This utility model adopts the above technical solution to realize the functional testing of the finished rain and light sensor, ensure the reliability of product use, and improve driving safety. Attached Figure Description

[0029] Figure 1 The diagram shown is a schematic diagram of the system in an embodiment of this utility model.

[0030] Figure 2 The diagram shown is a structural schematic of some devices in the system according to an embodiment of this utility model. Detailed Implementation

[0031] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0033] This embodiment discloses a testing system for a finished product of a rainfall and light intensity sensor, such as... Figure 1 and Figure 2 As shown, it includes: industrial control host 1, light source controller 2, light source 3, rain and light sensor finished product 4, PLC controller 5, sliding assembly, water spray assembly and air blowing assembly.

[0034] The industrial control host 1 is communicatively connected to the light source controller 2, and is used to send control commands to the light source controller 2. In this embodiment, the industrial control host 1 and the light source controller 2 are connected via RS232 (serial port), and the control commands sent to the light source controller 2 include the required brightness value of the light source 3 (e.g., 1000 brightness). Both the industrial control host 1 and the light source controller 2 use existing equipment; for example, the industrial control host 1 can be a PC.

[0035] The light source controller 2 is electrically connected to the light source 3 and is used to adjust the brightness of the light source 3 according to the control commands sent by the industrial control host 1. In this embodiment, in order to simulate the natural light outside the vehicle, the light source 3 is set to be composed of both white light and infrared light.

[0036] To avoid the influence of ambient light on the test, the test in this embodiment needs to be conducted in a completely dark environment, that is, both the light source 3 and the rain light sensor product are placed in a completely dark environment. To achieve the completely dark environment, this embodiment also includes a black box 6, a accordion 7, a first cylinder 8, and a first solenoid valve 9. The input terminal of the first solenoid valve 9 is electrically connected to the PLC controller 5, and the output terminal of the first solenoid valve 9 is electrically connected to the first cylinder 8. The piston of the first cylinder 8 is connected to the accordion 7 and is used to control the opening and closing of the accordion 7. The black box 6 is a light-blocking, sealed structure with an opening (such as a square opening). The light source 3 and the rain light sensor product 4 are both installed inside the black box 6. The accordion 7 is installed at the opening of the black box 6 and is used to open or block the opening according to the control of the first cylinder 8. With the above structure, during the test, the accordion cover 7 can be controlled to block the opening, so that the entire test is conducted in a completely dark environment; before and after the test, the accordion cover 7 can be controlled to open the opening, so that the user can easily replace the next rain and light sensor product 4 used for testing.

[0037] The industrial control host 1 is communicatively connected to the PLC controller 5 and is used to send control commands to the PLC controller 5. In this embodiment, the control commands sent by the industrial control host 1 to the PLC controller 5 are used to prompt the PLC controller 5 to start working.

[0038] PLC controller 5 is electrically connected to the sliding assembly and is used to control the sliding of the sliding assembly. The sliding assembly is connected to both the water spray assembly and the air blowing assembly. During rainfall testing, the sliding assembly moves the water spray assembly and the air blowing assembly above the rainfall and light sensor product 4; after the rainfall test, it moves the water spray assembly and the air blowing assembly away from above the rainfall and light sensor product 4. PLC controller 5 is electrically connected to the water spray assembly and is used to control whether the water spray assembly sprays water and the amount of water sprayed. PLC controller 5 is also electrically connected to the air blowing assembly and is used to control whether the air blowing assembly blows air.

[0039] In this embodiment, the sliding assembly includes a second cylinder (not visible in the figure) and a slide rail 11. The fixed end of the slide rail 11 is fixedly connected to the black box 6, and the sliding end is connected to the piston of the second cylinder. The second cylinder is electrically connected to the PLC controller 5. The water spray assembly includes a water tank (not visible in the figure), a water pump 12, and a water spraying device 13. The water pump 12 is electrically connected to the PLC controller 5 and is used to draw water from the water tank and deliver it to the water spraying device 13 after receiving a control signal sent by the PLC controller 5. The water spraying device 13 is fixedly connected to the sliding end of the slide rail 11. The air jet assembly includes an air bag (not visible in the figure), a second solenoid valve 14, and an air blowing device 15. The second solenoid valve 14 is electrically connected to the PLC controller 5 and is used to draw air from the air bag and deliver it to the air blowing device 15 after receiving a control signal sent by the PLC controller 5. The air blowing device 15 is fixedly connected to the sliding end of the slide rail 11.

[0040] Furthermore, to facilitate the recycling of water, this embodiment also includes a water receiving trough 16 located below the finished rain and light sensor 4. A water outlet pipe is connected to the bottom of the water receiving trough 16, and the other end of the water outlet pipe is connected to a water tank so that the water in the water receiving trough 16 flows into the water tank.

[0041] The industrial control host 1 is connected to the rain and light sensor product 4 for communication. It is used to receive messages sent by the rain and light sensor product 4 during the light test, which include the voltage value across the photodiode and the vehicle light status value, and messages sent by the rain and light sensor product 4 during the rain test, which include the infrared intensity value received by the infrared component and the wiper status value. Then, it determines whether the product is qualified based on the messages.

[0042] With the above-described structure of this embodiment, during rainfall testing, the industrial control host 1 sends a command to the PLC controller 5 to start the rainfall test. After receiving the command, the PLC controller 5 first controls the slide rail 11 to move via the second cylinder, so that the water spraying device 13 and the air blowing device 15 installed on the slide rail 11 move above the infrared component. Then, the PLC controller 5 controls the water pump 12 to pump water, so that water is sprayed from the water spraying device 13 onto the optical element (i.e., the shield) of the rainfall light sensor finished product 4. At the same time, it sends a control command to the microprocessor in the rainfall light sensor finished product 4, so that it executes the wiper control part corresponding to the code burned into its internal circuitry, and generates a corresponding message based on the infrared intensity value and the wiper status value and sends it to the industrial control host 1. Finally, the PLC controller 5 controls the second solenoid valve 14 to extract air, and blows air from the air blowing device 15 onto the optical element of the rainfall light sensor finished product 4, so that the water droplets remaining on the optical element are cleaned. During the illumination test, the industrial control host 1 adjusts the light source 3 to a fixed brightness through the light source controller 2, and then sends a command to the PLC controller 5 to start the illumination test. After receiving the command, the PLC controller 5 sends a control command to the microprocessor in the rain and light sensor product 4, so that it executes the vehicle light control part corresponding to the code burned into its internal circuitry, and generates a corresponding message based on the voltage value across the photodiode and the vehicle light status value and sends it to the industrial control host 1.

[0043] After receiving the message, the industrial control host 1 determines whether the wiper control part is qualified based on whether the infrared intensity value and the wiper status value correspond, and determines whether the headlight control part is qualified based on whether the voltage value across the photodiode corresponds to the headlight status value. When both are qualified, the rain and light sensor product 4 is qualified.

[0044] To ensure accurate detection, this embodiment includes two infrared components positioned on either side of a photodiode. Correspondingly, it includes two water spray components and two air blowing components. A water spray component and an air blowing component form a group for spraying water and blowing air onto one infrared component.

[0045] Furthermore, this embodiment also includes a display 10 connected to the industrial control host 1 for displaying results and facilitating user judgment.

[0046] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A testing system for a finished product of a rainfall and light intensity sensor, characterized in that, include: Industrial control host, light source controller, light source, finished rain and light sensor, PLC controller, sliding assembly, water spray assembly, and air blowing assembly; among which: The industrial control host is connected to the light source controller and the PLC controller for communication, and is used to send control commands to the light source controller and the PLC controller. The light source controller is electrically connected to the light source and is used to adjust the brightness of the light source according to the control commands sent by the industrial control host. The light source is used to provide illumination for the finished rain gauge sensor in a completely dark environment; The PLC controller is electrically connected to the sliding component and is used to control the sliding of the sliding component. The sliding component is connected to the water spray component and the air blowing component respectively, and is used to move the water spray component and the air blowing component above the finished rain light sensor during the rain test, and to move the water spray component and the air blowing component away from the finished rain light sensor after the rain test. The PLC controller is electrically connected to the water spray assembly and is used to control whether the water spray assembly sprays water and the amount of water sprayed. The PLC controller is electrically connected to the air blowing assembly and is used to control whether the air blowing assembly blows air. The industrial control host is connected to the finished rain and light sensor to receive messages sent by the finished rain and light sensor during light illumination testing, which include the voltage value across the photodiode and the vehicle light status value, and messages sent by the finished rain and light sensor during rain measurement testing, which include the infrared intensity value received by the infrared component and the wiper status value. The host then determines whether the sensor is qualified based on the messages.

2. The rain gauge and illumination sensor finished product testing system according to claim 1, characterized in that: The industrial control host and the light source controller are connected via RS232.

3. The rain and light sensor finished product testing system according to claim 1, characterized in that: The industrial control host and the PLC controller are connected via Ethernet.

4. The rain and light sensor finished product testing system according to claim 1, characterized in that: The industrial control host and the finished rain and light sensor are connected via CAN bus or LIN bus.

5. The rain gauge and light intensity sensor finished product testing system according to claim 1, characterized in that: It also includes a black box, a linear accordion cover, a first cylinder, and a first solenoid valve; The input terminal of the first solenoid valve is electrically connected to the PLC controller, and the output terminal of the first solenoid valve is electrically connected to the first cylinder. The piston of the first cylinder is connected to a straight-line organ cover, which is used to control the opening and closing of the straight-line organ cover; The black box is a sealed structure with an opening and is light-proof. The light source and the finished rain and light sensor are installed inside the black box. A straight accordion cover is installed at the opening of the black box to open or close the opening according to the control of the first cylinder.

6. The rain and light sensor finished product testing system according to claim 5, characterized in that: The sliding assembly includes a second cylinder and a slide rail. The fixed end of the slide rail is fixedly connected to the black box, and the sliding end is connected to the piston of the second cylinder. The second cylinder is electrically connected to the PLC controller.

7. The rain gauge and illumination sensor finished product testing system according to claim 6, characterized in that: The water spray assembly includes a water tank, a water pump, and a water spray device; the water pump is electrically connected to the PLC controller and is used to draw water from the water tank and deliver it to the water spray device after receiving the control signal sent by the PLC controller; the water spray device is fixedly connected to the sliding end of the slide rail.

8. The rain and light sensor finished product testing system according to claim 6, characterized in that: The jet assembly includes an airbag, a second solenoid valve, and an air blowing device; the second solenoid valve is electrically connected to the PLC controller and is used to draw air from the airbag and deliver it to the air blowing device after receiving the control signal sent by the PLC controller; the air blowing device is fixedly connected to the sliding end of the slide rail.

9. The rain and light sensor finished product testing system according to claim 6, characterized in that: It also includes a water collection trough located below the finished rain and light sensor, with a water outlet pipe connected to the bottom of the trough and the other end of the water outlet pipe connected to a water tank so that the water in the trough flows into the water tank.

10. The rain gauge and illumination sensor finished product testing system according to claim 6, characterized in that: The infrared component includes two components, which are respectively located on both sides of the photodiode; the water spray component and the air blowing component each include two components, with one water spray component and one air blowing component forming a set, which are used to spray water and blow air onto one infrared component.

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