Test device for a pneumatic brake light switch

Abstract

The application relates to a testing device for a pneumatic brake light switch, comprising a control chip, a pneumatic controller, a pneumatic simulation test table, a pneumatic collector and a load indicator; the control chip is connected with the pneumatic controller, the pneumatic collector and the load indicator, a to-be-tested pneumatic brake light switch is arranged in the pneumatic simulation test table, and the to-be-tested pneumatic brake light switch is connected with the load indicator. In the application, the control chip controls the pneumatic pressure of the pneumatic simulation test table through the pneumatic controller, if the pneumatic pressure meets the requirement, the to-be-tested pneumatic brake light switch in the pneumatic simulation test table is in a closed state, the load indicator is lighted, the controller collects the response time of the to-be-tested pneumatic brake light switch, and the accurate testing of the on-off life of the to-be-tested pneumatic brake light switch is realized; and the scheme is simple in operation, can realize the automatic testing of the pneumatic brake light switch, and improves the testing efficiency of the pneumatic brake light switch.

Description

Technical Field

[0001] This application relates to the field of switch testing, and more particularly to a testing device for a pneumatic brake light switch. Background Technology

[0002] A pneumatic brake light switch is installed on the air pressure line of a car's braking system. Its working principle is to use the pressure change of compressed air during braking to control the on / off state of the brake circuit, thereby illuminating and extinguishing the brake lights. When the driver presses the brake pedal, the compressed air pressure in the braking system increases, pushing the rubber diaphragm inside the brake light switch upwards, thus connecting the brake light circuit. Current flows through, illuminating the brake lights and signaling the brakes to following vehicles and pedestrians. When the driver releases the brake pedal, the air pressure in the brake line decreases, and the rubber diaphragm returns to its original shape under its own elasticity or the action of a return spring, bending downwards and disconnecting the contacts, cutting off the brake light circuit and extinguishing the brake lights.

[0003] As a frequently used automotive component, the reliability of pneumatic brake light switches is closely related to vehicle safety. Failure can lead to serious safety hazards, making the on / off life test a key quality test item for this component.

[0004] In existing testing technologies, manual sampling is generally used to measure relevant electrical parameters using power supplies, multimeters, oscilloscopes, etc., and then to determine whether the brake light switch meets the technical requirements. However, this operation mode has low testing efficiency and is highly dependent on human operation and judgment.

[0005] Therefore, how to achieve rapid and accurate testing of pneumatic brake light switches is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] This application provides a testing device for a pneumatic brake light switch, which enables rapid and accurate testing of the pneumatic brake light switch.

[0007] In a first aspect, this application provides a testing device for a pneumatic brake light switch, comprising: a control chip, a pneumatic controller, a pneumatic simulation test bench, a pneumatic data acquisition unit, and a load indicator light;

[0008] The control chip is connected to the air pressure controller, the air pressure acquisition unit and the load indicator light, and is used to send control commands to the air pressure controller and generate the response time test results of the air pressure brake light switch under test.

[0009] The air pressure controller is connected to the air pressure simulation test bench and is used to control the air intake and air outlet states of the air pressure simulation test bench according to the control command.

[0010] The air pressure acquisition device is connected to the air pressure simulation test bench and is used to acquire the air pressure value of the air pressure simulation test bench in real time.

[0011] The air pressure simulation test bench is connected to the air pressure brake light switch under test, and the air pressure brake light switch under test is connected to the load indicator light.

[0012] Optionally, the air pressure controller includes: an inlet solenoid valve and an outlet solenoid valve;

[0013] The intake solenoid valve is connected to the air pressure simulation test bench via an intake pipe, and the exhaust solenoid valve is connected to the air pressure simulation test bench via an exhaust pipe.

[0014] Optionally, the device further includes:

[0015] A universal mounting stand is used to fix the pneumatic brake light switch to be tested.

[0016] Optionally, the device further includes:

[0017] A power module connected to both the control chip and the air pressure brake light switch under test is used to supply power to the control chip and the air pressure brake light switch under test.

[0018] Optionally, the device further includes:

[0019] A power start switch connected to the power module.

[0020] Optionally, the device further includes:

[0021] A start switch and a stop switch are connected to the control chip.

[0022] Optionally, the device further includes:

[0023] The testing instrument is connected to both the air pressure brake light switch under test and the control chip, and is used to obtain the resistance value of the closed contact resistance of the air pressure brake light switch under test and send it to the control chip.

[0024] The control chip is also used to generate resistance test results based on the resistance value.

[0025] Optionally, the device further includes:

[0026] The test result indicator light is connected to the control chip and is used to display the response time test result and / or the resistance test result.

[0027] Optionally, the test result indicator light includes: a pass indicator light for displaying test success information, and a fault indicator light for displaying fault information.

[0028] Optionally, the device further includes:

[0029] A human-computer interaction device, which is connected to the control chip, is used to set test parameters and display the response time test results and / or the resistance test results.

[0030] Compared with the prior art, the technical solution provided in this application has the following advantages: This application discloses a testing device for a pneumatic brake light switch, including: a control chip, a pneumatic controller, a pneumatic simulation test bench, a pneumatic data acquisition unit, and a load indicator light. The control chip is connected to the pneumatic controller, the pneumatic data acquisition unit, and the load indicator light. The pneumatic brake light switch to be tested is set inside the pneumatic simulation test bench and is connected to the load indicator light. In this application, the control chip controls the air pressure of the pneumatic simulation test bench through the pneumatic controller. If the air pressure meets the requirements, the pneumatic brake light switch to be tested inside the pneumatic simulation test bench is in a closed state, illuminating the load indicator light. The controller achieves accurate testing of the pneumatic brake light switch to be tested by acquiring the response time of the pneumatic brake light switch to be tested. Furthermore, this solution is simple to operate. After setting the test parameters, automatic testing of the pneumatic brake light switch can be achieved, improving the testing efficiency of the pneumatic brake light switch. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0034] Figure 1 A schematic diagram of a test device for a pneumatic brake light switch provided in an embodiment of this application;

[0035] Figure 2 A schematic diagram of a test device for another pneumatic brake light switch provided in an embodiment of this application;

[0036] Figure 3A schematic diagram of a test device for a pneumatic brake light switch provided in an embodiment of this application;

[0037] Figure 4 A test flowchart for a pneumatic brake light switch provided in an embodiment of this application;

[0038] Figure 5 A schematic diagram of the control of the test apparatus provided in the embodiments of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0041] This application provides a testing device for a pneumatic brake light switch, enabling rapid and accurate testing of the pneumatic brake light switch.

[0042] See Figure 1 This is a schematic diagram of a test device for a pneumatic brake light switch provided in an embodiment of this application. The device includes: a control chip 11, a pneumatic controller 12, a pneumatic simulation test bench 13, a pneumatic data acquisition unit 14, and a load indicator light 15.

[0043] The control chip 11 is connected to the air pressure controller 12, the air pressure acquisition unit 14 and the load indicator light. It is used to send control commands to the air pressure controller 12 and generate the response time test results of the air pressure brake light switch 2 under test.

[0044] The air pressure controller 12 is connected to the air pressure simulation test bench 13 and is used to control the air intake and air output states of the air pressure simulation test bench 13 according to control commands; the air pressure acquisition device 14 is connected to the air pressure simulation test bench 13 and is used to acquire the air pressure value of the air pressure simulation test bench 13 in real time; the air pressure simulation test bench 13 is connected to the air pressure brake light switch 2 under test and the air pressure brake light switch 2 under test is connected to the load indicator light 15.

[0045] In this application, the testing device includes: a control chip 11, a pressure controller 12, a pressure simulation test bench 13, a pressure acquisition device 14, and a load indicator light 15; the control chip 11 is connected to the pressure controller 12, the pressure acquisition device 14, and the load indicator light 15; the pressure controller 12 is connected to the pressure simulation test bench 13; the pressure acquisition device 14 is connected to the pressure simulation test bench 13; the pressure simulation test bench 13 is connected to the pressure-controlled brake light switch 2 under test; and the pressure-controlled brake light switch 2 under test is connected to the load indicator light 15.

[0046] Among them, the control chip 11 is the core of the entire test device, and its main functions are to send instructions, receive instructions, process instructions, and judge test data. The control chip 11 can be selected according to actual needs. In this application, the control chip 11 is an STM32F103VET6 chip. The STM32F103VET6 chip is a high-performance, small-size, fast-operating, low-power, low-cost, and multi-IO (Input / Output) STM32-bit microcontroller. The main function of the air pressure controller 12 is to control the air intake and exhaust states of the air pressure simulation test bench 13. The air pressure simulation test bench 13 is a compressed air chamber made of metal, which can simulate air pressure fluctuations during vehicle braking and realize high-frequency on / off operation of the air pressure brake switch. The air pressure acquisition device 14 is an adjustable air pressure sensor with high sampling accuracy and an error range of 0.1%FS (Full Scale). The air pressure acquisition device 14 is used to collect the air pressure value of the air pressure simulation test bench 13 and determine whether the collected air pressure value meets the opening condition of the air pressure brake switch. If the opening condition is met, a command is sent to the control chip 11.

[0047] During testing, the control chip 11 sends an air intake command to the air pressure controller 12. Upon receiving the air intake command, the air pressure controller 12 controls the air pressure simulation test bench 13 to intake air. The air pressure acquisition device 14 monitors the air pressure value of the air pressure simulation test bench 13 in real time. If the opening condition of the air pressure brake switch is met, the air pressure acquisition device 14 sends a notification command to the control chip 11 indicating that the air pressure meets the condition. The opening condition can be: if the acquired air pressure value reaches the closed air pressure value set by the user, it is determined that the opening condition has been met; otherwise, it is determined that the opening condition has not been met.

[0048] After receiving a notification command indicating that the air pressure meets the requirements, the control chip 11 sends a stop air intake command to the air pressure controller 12. Upon receiving the stop air intake command, the air pressure controller 12 stops supplying air to the air pressure simulation test bench 13. Since the air pressure value inside the air pressure simulation test bench 13 has reached the opening condition of the air pressure brake switch, the air pressure brake switch will switch from the open state to the closed state and illuminate the load indicator light 15. The control chip 11 calculates the response time, which is the time from when the air pressure value inside the air pressure simulation test bench 13 reaches the opening condition to when the load indicator light 15 is illuminated. That is, if the time when the air pressure of the air pressure simulation test bench 13 reaches the opening condition is called the first time, and the time when the load indicator light 15 is illuminated is called the second time, then the difference between the second time and the first time is calculated, and this difference is called the response time.

[0049] After the control chip 11 calculates the response time, it needs to compare the response time with the preset standard switch response time. If the response time is less than the standard switch response time, the response time test result is determined to be: test successful; otherwise, the response time test result is determined to be: test failed. In this application, the standard switch response time can be set to 0.5 seconds. If the response time is less than 0.5 seconds, it means the test is successful; otherwise, it means the test has failed and the air pressure brake light switch 2 under test is faulty.

[0050] In summary, in this application, the control chip 11 controls the air pressure of the air pressure simulation test bench 13 through the air pressure controller 12. If the air pressure meets the requirements, the air pressure brake light switch 2 under test in the air pressure simulation test bench 13 is in a closed state, and the load indicator light 15 is lit. The controller achieves accurate testing of the air pressure brake light switch 2 under test by collecting the response time of the air pressure brake light switch 2 under test. Furthermore, this solution is simple to operate. After setting the test parameters, automatic testing of the air pressure brake light switch can be achieved, thereby improving the testing efficiency of the air pressure brake light switch.

[0051] See Figure 2 This is a schematic diagram of another test device for a pneumatic brake light switch provided in an embodiment of this application. The device includes the control chip 11, pneumatic controller 12, pneumatic simulation test bench 13, pneumatic data acquisition unit 14, and load indicator light 15 described in the above embodiment. It also includes a test instrument 16, which is connected to both the pneumatic brake light switch 2 under test and the control chip 11. The test instrument 16 is used to acquire the resistance value of the closed contact resistance of the pneumatic brake light switch 2 under test and send it to the control chip 11. The control chip 11 is also used to generate a resistance test result based on the resistance value.

[0052] It should be noted that there are two main electrical parameters for the life test of pneumatic brake light switches: one is the electrical signal response time under standard atmospheric pressure, which is typically required to be <0.5 seconds (s); the other is the switch closing contact resistance, which is required to be <50 milliohms (mΩ). In this application, a high-precision testing instrument 16 at the milliohm level is set in the testing device. This testing instrument 16 is connected to both the pneumatic brake light switch 2 under test and the control chip 11. Through this testing instrument 16, the closing contact resistance of the pneumatic brake light switch 2 under test can be tested, and the resistance value can be sent to the control chip 11. The control chip 11 can compare the resistance value with a standard resistance value to generate a resistance test result. If the resistance value is less than the standard resistance value, the resistance test result is a successful test; otherwise, the resistance test result is a failed test. In this application, the standard resistance value can be set to 50 milliohms, or other values ​​can be set; no specific limitation is made here.

[0053] In summary, the testing device described in this application can realize the on / off operation of the pneumatic brake light switch, the acquisition of response time data, and the rapid judgment of test results. Furthermore, the testing instrument 16 can also test the contact resistance of the pneumatic brake light switch, effectively realizing rapid and accurate testing of the on / off life of the pneumatic brake switch.

[0054] In another embodiment of this application, the testing apparatus further includes:

[0055] Test result indicator light, which is connected to the control chip, is used to display the response time test result and / or resistance test result.

[0056] In this application, the test result indicator light is connected to a control chip. After obtaining the test results, the control chip can control the test result indicator light to visually display the test results. The test results include: response time test results and / or resistance test results. In this application, the number of test result indicator lights can be set according to actual needs; there can be one or more. After testing the response time and / or resistance test results, the control chip controls the test result indicator light to display the corresponding test results based on the corresponding test results.

[0057] Furthermore, when the test results are displayed by the test result indicator light, the test results can be distinguished by the color of the light. For example, if the test result is successful, the test result indicator light will be green, and if the test result is unsuccessful, the test result indicator light will be red. Alternatively, the test results can be distinguished by the flashing frequency of the light. For example, if the test result is successful, the test result indicator light will be constantly on, and if the test result is unsuccessful, the test result indicator light will flash.

[0058] In another embodiment of this application, the test result indicator includes: a pass indicator for displaying test success information, and a fault indicator for displaying fault information.

[0059] In this application, to effectively distinguish test results, separate pass indicator lights and fault indicator lights can be set. If the test passes, the pass indicator light will illuminate; if the test fails, the fault indicator light will illuminate. Furthermore, the number of pass indicator lights and fault indicator lights in this application can be set according to requirements. For example, only one set of pass indicator lights and fault indicator lights can be set to alternately display the response time test result and the resistance test result; or two sets of pass indicator lights and fault indicator lights can be set, where one set of pass indicator lights and fault indicator lights only displays the response time test result, and the other set displays the resistance test result.

[0060] In summary, this application can display test results to users more intuitively through test result indicator lights; these test result indicator lights may include pass indicator lights and fault indicator lights, which can display different test results to users respectively, thus achieving an intuitive and effective display of test results.

[0061] In another embodiment of this application, the testing apparatus further includes:

[0062] A human-computer interaction device, which is connected to a control chip, is used to set test parameters and display response time test results and / or resistance test results.

[0063] In this application, a human-machine interface device connected to the control chip can be set up. This human-machine interface device has a display screen / touch screen, on which a human-machine communication interface can be displayed. The human-machine communication interface can be used to set test parameters and display test results. The test parameters include standard switch response time, standard resistance value, closing air pressure value, test number threshold and interval time, etc. After each test result, the response time test result or resistance test result can be displayed on the human-machine communication interface. It can also display other data such as the current total number of tests, which are not specifically limited here.

[0064] Furthermore, the human-machine interface can also display corresponding buttons for starting and stopping the test, allowing users to start or stop the test by triggering the corresponding buttons. At the same time, the human-machine interface can use anti-touch screen lock technology to prevent accidental operation after the device is running.

[0065] In summary, this application, by setting up a human-computer interaction device, facilitates users in inputting test parameters and intuitively displays test results, thereby improving the user experience.

[0066] In another embodiment of this application, the air pressure controller includes an intake solenoid valve and an outlet solenoid valve; the intake solenoid valve is connected to the air pressure simulation test bench via an intake pipe, and the outlet solenoid valve is connected to the air pressure simulation test bench via an outlet pipe.

[0067] In this application, the main component of the air pressure controller is the air pipe solenoid valve, which is divided into an inlet solenoid valve and an outlet solenoid valve, see [link to relevant documentation]. Figure 3 This is a schematic diagram of a test device simulation circuit for a pneumatic brake light switch provided in an embodiment of this application; through... Figure 3 As can be seen, the control chip is connected to the air pressure sensor via acquisition lines A and B. The air pressure sensor is connected to the air pressure simulation test bench. The control chip is connected to the intake solenoid valve via control lines A and B. The control chip is also connected to the exhaust solenoid valve via control lines A and B. The intake solenoid valve is connected to the air pressure simulation test bench via the intake pipe. The exhaust solenoid valve is connected to the air pressure simulation test bench via the exhaust pipe. The air pressure simulation test bench is connected to the pneumatic brake light switch product. The pneumatic brake light switch product is connected to the load indicator light via conduction lines A and B. The load indicator light is connected to the control chip via acquisition lines A and B. Figure 2 The display / touchscreen and control chip are connected via RXD (Receive Data) and TXD (Transmit Data).

[0068] After setting test parameters to the control chip via a display / touchscreen, during testing, the control chip sends an intake command to the intake solenoid valve to open it, thereby increasing the air pressure value of the air pressure simulation test bench. If the air pressure value of the air pressure simulation test bench reaches the opening condition of the air pressure brake switch, the control chip sends an air pressure condition met notification command to the exhaust solenoid valve to close it. If the test ends, the control chip sends an exhaust command to the exhaust solenoid valve to open it, thereby reducing the air pressure value of the air pressure simulation test bench. After the air pressure value drops to the default value, the next round of testing continues until the current total number of tests reaches the test count threshold.

[0069] In another embodiment of this application, the testing apparatus further includes:

[0070] A universal mounting stand for fixing the pneumatic brake light switch under test; a power module connected to both the control chip and the pneumatic brake light switch under test for supplying power to both; a power start switch connected to the power module; and start and stop switches connected to the control chip.

[0071] This application also requires a universal mounting platform that can accommodate pneumatic brake switches of different specifications. Furthermore, it requires a power module that converts 220V AC power into 5V / 12V / 24V DC power to supply power to the control chip and the pneumatic brake light switch under test. Additionally, this application includes a separate power start switch for the power module. This power start switch can be disconnected when not in use and closed during testing to protect the testing device. Finally, this application includes a start switch and a stop switch connected to the control chip. During testing, the test can be started by closing the start switch, and the test can be stopped by closing the stop switch.

[0072] See Figure 4 This document presents a test flowchart for a pneumatic brake light switch, as provided in an embodiment of this application. As shown, when testing the pneumatic brake light switch, the switch to be tested must first be correctly installed on a test bench, which can be a general-purpose mounting bench as described in this embodiment. Then, the power cord is connected, and after the power start switch is closed, power is supplied to the control chip and the pneumatic brake light switch via the power module. The start switch is then closed again, and test conditions are set through the human-machine interface on the display / touchscreen. These test conditions include the standard switch response time, standard resistance value, and closing air pressure value of the pneumatic brake light switch as test judgment criteria. The test count threshold and interval time are then set, and the user returns to the test interface. During testing, the pneumatic brake switch is judged to be faulty according to the pre-set judgment criteria. If it passes, the test ends, and the user waits for the next round of testing. If it fails, an alarm is triggered by a fault indicator light, and fault information is displayed on the display / touchscreen.

[0073] See Figure 5 This is a control schematic diagram of the testing device provided in the embodiments of this application; Figure 5In this example, the response time test is used as an example. Before testing, the test conditions are set through the human-machine interface on the display screen / touchscreen. During a single test, the start switch button is pressed to start the test program. The control chip opens the inlet solenoid valve of the air pressure controller and closes the outlet solenoid valve according to the set closing air pressure value. When the air pressure acquisition device collects the air pressure of the air pressure simulation test bench and it reaches the closing air pressure value, the controller controls the air pressure controller to close the inlet solenoid valve. At this time, the air pressure brake light switch closes and the load indicator light is lit. After the load indicator light is lit, the control chip completes the response time acquisition and compares the test result with the standard switch response time. The response time test result is generated and sent to the human-machine interface for display. The control chip controls the qualified indicator light or the fault indicator light to light up according to the response time test result. The control chip then controls the outlet solenoid valve to open. After the pressure in the air pressure chamber of the air pressure simulation test bench is adjusted to 0 pressure, the outlet solenoid valve is closed, and the test is ready to proceed to the next test.

[0074] This application repeats the above workflow during multiple on / off life tests. The human-machine interface displays the test results and the number of tests, including the current total number of tests and a test count threshold. The control chip compares the current total number of tests with the test count threshold to determine whether further testing is needed. If the current total number of tests has not reached the test count threshold, the control chip continues to the next test cycle. If the current total number of tests has reached the test count threshold, the test ends. Furthermore, after completing multiple tests, this application can display the final test results. For example, if the response time of the pneumatic brake light switch deviates from the standard switch response time more than a predetermined threshold, or if the pneumatic brake light switch remains in the closed state, the control chip determines that the test is unqualified, alarms and displays fault information through the human-machine interface and fault warning lights, alerts the staff, and automatically stops the test, awaiting manual handling and reset.

[0075] In summary, this application discloses an automatic testing device for the on / off life of a pneumatic brake light switch. The device includes a control chip, a power module, a simulated air pressure test bench, an air pressure controller, an air pressure acquisition unit, a load indicator light, and a human-machine interface. This application can integrate various electronic control systems into a complete testing device. Before testing, after setting the corresponding test parameters on the human-machine interface, the control chip, as the core, simulates air pressure fluctuations during vehicle braking, achieving high-frequency on / off operations of the pneumatic brake light switch. The effectiveness of its operation can be quickly determined by collecting the response time of the load indicator light. Furthermore, this application can also test the contact resistance of the pneumatic brake light switch using testing instruments, effectively and quickly testing the on / off life of the pneumatic brake light switch. The testing device provided by this solution is simple to operate; after setting the test parameters, it can automatically test the pneumatic brake light switch, which is convenient, fast, and improves the testing efficiency of the brake light switch's on / off life.

[0076] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0077] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A testing device for a pneumatic brake light switch, characterized in that, include: Control chip, air pressure controller, air pressure simulation test bench, air pressure acquisition device and load indicator light; The control chip is connected to the air pressure controller, the air pressure acquisition unit and the load indicator light, and is used to send control commands to the air pressure controller and generate the response time test results of the air pressure brake light switch under test. The air pressure controller is connected to the air pressure simulation test bench and is used to control the air intake and air outlet states of the air pressure simulation test bench according to the control command. The air pressure acquisition device is connected to the air pressure simulation test bench and is used to acquire the air pressure value of the air pressure simulation test bench in real time. The air pressure simulation test bench is connected to the air pressure brake light switch under test, and the air pressure brake light switch under test is connected to the load indicator light.

2. The testing apparatus according to claim 1, characterized in that, The air pressure controller includes: an inlet solenoid valve and an outlet solenoid valve; The intake solenoid valve is connected to the air pressure simulation test bench via an intake pipe, and the exhaust solenoid valve is connected to the air pressure simulation test bench via an exhaust pipe.

3. The testing apparatus according to claim 1, characterized in that, Also includes: A universal mounting stand is used to fix the pneumatic brake light switch to be tested.

4. The testing apparatus according to claim 1, characterized in that, Also includes: A power module connected to both the control chip and the air pressure brake light switch under test is used to supply power to the control chip and the air pressure brake light switch under test.

5. The testing apparatus according to claim 4, characterized in that, Also includes: A power start switch connected to the power module.

6. The testing apparatus according to claim 5, characterized in that, Also includes: A start switch and a stop switch are connected to the control chip.

7. The testing apparatus according to any one of claims 1 to 6, characterized in that, Also includes: The testing instrument is connected to both the air pressure brake light switch under test and the control chip, and is used to obtain the resistance value of the closed contact resistance of the air pressure brake light switch under test and send it to the control chip. The control chip is also used to generate resistance test results based on the resistance value.

8. The testing apparatus according to claim 7, characterized in that, Also includes: The test result indicator light is connected to the control chip and is used to display the response time test result and / or the resistance test result.

9. The testing apparatus according to claim 8, characterized in that, The test result indicator lights include: a pass indicator light for displaying test success information, and a fault indicator light for displaying fault information.

10. The testing apparatus according to claim 7, characterized in that, Also includes: A human-computer interaction device, which is connected to the control chip, is used to set test parameters and display the response time test results and / or the resistance test results.

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