TPMS automatic production testing device

Abstract

The utility model relates to a TPMS automatic production testing device, which comprises a testing control board, a testing instrument and an upper computer PC terminal, the upper computer PC terminal is respectively in communication connection with the testing instrument and the testing control board, the testing control board and the testing instrument are respectively in communication connection with a product to be tested, the testing control board comprises an MCU control module, a relay and a low-frequency emission circuit, an ADC module arranged in the MCU control module is connected with a product to be tested to obtain current and voltage of the product to be tested; a GPIO port of the MCU control module is connected with the relay, the relay is connected with an electromagnetic valve of the air pump, a product to be tested is placed in the air tank, the air pump compresses and decompresses the interior of the air tank, and the test control panel obtains air pressure data of the product to be tested; the low-frequency emission circuit is connected with the to-be-tested product and is used for sending a low-frequency signal to the to-be-tested product. According to the utility model, automatic testing of main testing functions of the tire pressure sensor can be completed in a one-stop manner, the production efficiency and the product quality are improved, and the production cost is saved for enterprises.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronics, in particular to a TPMS automated production and testing device. Background Art

[0002] During the TPMS automated production process, the main functions of the finished TPMS products need to be tested to promptly identify potential problems in the TPMS products and improve product quality and reliability.

[0003] Traditional TPMS product functional testing relies on manual operation. Faced with complicated testing procedures and numerous test items, human factors can easily lead to problems such as misjudgment and missed tests, which not only limits the improvement of production efficiency, but also affects the final quality stability of the product and increases the company's production costs.

[0004] Therefore, there is an urgent need to provide a TPMS automated production test device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and defects of the prior art and provide a TPMS automated production test device to complete the automated test of the main test functions of the tire pressure sensor in one stop, thereby improving production efficiency and product quality and saving production costs for enterprises.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A TPMS automated production test device, comprising a test control board, a test instrument and a host computer PC end, wherein the host computer PC end is respectively connected to the test instrument and the test control board for communication, wherein the test control board and the test instrument are respectively connected to the product to be tested for communication, wherein the test control board comprises an MCU control module, a relay, and a low-frequency transmitting circuit, wherein the built-in ADC module of the MCU control module is connected to the product to be tested to obtain the current and voltage of the product to be tested;

[0008] The GPIO port of the MCU control module is connected to the relay, the relay is connected to the solenoid valve of the air pump, the product to be tested is placed in the gas tank, the air pump increases and decreases the pressure inside the gas tank, and the test control board obtains the air pressure data of the product to be tested;

[0009] The low-frequency transmitting circuit is connected to the product to be tested and is used to send a low-frequency signal to the product to be tested.

[0010] As a preferred technical solution of the utility model, the test control board also includes a current test module, and the current test module includes a precision operational amplifier, a sampling resistor, and an operational comparator to detect the static current of the tire pressure sensor.

[0011] As a preferred technical solution of the utility model, the test control board also includes a PCBA burning module, the PCBA burning module includes an analog switch and a burning port, and the burning port is located between the MCU control module and the analog switch.

[0012] As a preferred technical solution of the present utility model, the test control board also includes a data storage and aggregation module, and the data storage and aggregation module is connected to the MCU control module.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model tests the main functions of the product to be tested through the test control board and the test instrument, including the voltage test function, the current test function, the pressure test function, the transmission power test function, the low-frequency wake-up function and the high-frequency transmission function, and communicates with the host PC to display the test results on the host PC. Through the one-stop test process, potential problems in TPMS products can be discovered and repaired in a timely manner, and the detection efficiency and accuracy of the TPMS product production line can be improved, thereby improving the overall quality and reliability of the product and saving production costs for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural block diagram of the utility model.

[0016] Figure 2 This is an interface diagram of the upper computer PC of the utility model. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0018] The specific implementation process of the utility model is as follows:

[0019] like Figure 1 As shown, a TPMS automated production test device is used to test the main functions of the product to be tested, including a test control board, a test instrument and a host PC. The host PC is respectively connected to the test instrument and the test control board for communication, and the test results are displayed on the host PC. Figure 2As shown. The test control board and the test instrument are connected to the product to be tested respectively. The test control board includes an MCU control module, a relay, and a low-frequency transmitting circuit. The built-in ADC module of the MCU control module is connected to the product to be tested to obtain the current and voltage of the product to be tested. The GPIO port of the MCU control module is connected to the relay, and the relay is connected to the solenoid valve of the air pump. The product to be tested is located in the gas tank. The air pump is inside the gas tank to increase or decrease the pressure. The test control board obtains the air pressure data of the product to be tested, and the low-frequency transmitting circuit is connected to the product to be tested, and sends a low-frequency signal to the product to be tested. Specifically, the host PC is connected to the test instrument through a LAN interface or a USB interface, and the test instrument general protocol is used for communication. The test instrument sends the collected data of the product to be tested to the host PC. The host PC is connected to the test control board through an RS232 interface for controlling the test control board to process the data of the product to be tested. The test control board and the test instrument are connected to the product to be tested respectively to obtain the data of the product to be tested.

[0020] Furthermore, the MCU control module has a built-in ADC module to detect the voltage of the product to be tested, convert the analog signal into a digital signal for processing by the MCU control module, and compare the measured voltage data with the set standard data range to determine whether the voltage of the product to be tested meets the test standards, thereby realizing the detection of the tire pressure sensor voltage test function.

[0021] Furthermore, since the static current of the tire pressure sensor is extremely small, at the nA level, the utility model detects the current of the tire pressure sensor through a current detection module, which includes a precision operational amplifier, a sampling resistor, and an operational comparator, and then performs compensation calibration through a software algorithm to measure an accurate static current value. Similarly, by comparing the measured static current value with the set standard data, it is determined whether the current of the product to be tested meets the test standard, thereby realizing the detection of the current test function of the tire pressure sensor.

[0022] Furthermore, the GPIO port of the MCU control module controls the on and off of the relay, thereby controlling the switch of the solenoid valve of the air pump to enable the air pump to increase or decrease the air pressure in the gas tank. The product to be tested is placed in the gas tank, and the test control board reads the air pressure data emitted by the product to be tested in real time, compares the air pressure data with the standard air pressure, and determines whether the pressure detection function of the product to be tested meets the test standards, thereby realizing the detection of the pressure test function of the tire pressure sensor.

[0023] Furthermore, the test control board transmits a power command to the product to be tested, and the product to be tested sends the corresponding power after receiving it. The test instrument collects power data and sends it to the host PC, which sends it to the control board for comparison. The output test results are given to the host PC for display, thereby realizing the detection of the tire pressure sensor transmission power test function.

[0024] Furthermore, a low-frequency signal is sent to the product under test through a 125K low-frequency transmitting circuit. After receiving the low-frequency signal, the product under test is awakened and sends out a high-frequency radio frequency signal. After receiving the high-frequency radio frequency signal, the MCU control module determines whether the low-frequency wake-up function and high-frequency transmitting function of the product under test are normal, thereby realizing the detection of the low-frequency wake-up function and high-frequency transmitting function of the tire pressure sensor.

[0025] In an embodiment of the utility model, the test control board further includes a PCBA burning module, the PCBA burning module includes an analog switch and a burning port, the burning port is located between the MCU control module and the analog switch, and the MCU control module and the analog switch are connected via i2c communication. The MCU control module controls the analog switch to switch the burning port, and specifically, the analog switch can select an analog switch of 16 / 32 channels to realize burning switching control according to the number of products burned at a single time.

[0026] In an embodiment of the utility model, the test control board also includes a data storage and aggregation module, which is connected to the MCU control module. Specifically, the MCU control module communicates with the product to be tested. After the test cycle is completed, the MCU control module reads the ID of the product to be tested, and the test control board saves the ID of the product to be tested and its test results, and performs batch aggregation, counts the number of bad data and the bad ratio of the whole batch of data, and can be displayed on the host PC for users to view.

[0027] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A TPMS automated production test device, characterized in that: It includes a test control board, a test instrument and a host computer PC end, the host computer PC end is respectively connected to the test instrument and the test control board for communication, the test control board and the test instrument are respectively connected to the product to be tested for communication, the test control board includes an MCU control module, a relay, and a low-frequency transmitting circuit, the built-in ADC module of the MCU control module is connected to the product to be tested to obtain the current and voltage of the product to be tested; The GPIO port of the MCU control module is connected to the relay, the relay is connected to the solenoid valve of the air pump, the product to be tested is placed in the gas tank, the air pump increases and decreases the pressure inside the gas tank, and the test control board obtains the air pressure data of the product to be tested; The low-frequency transmitting circuit is connected to the product to be tested and is used to send a low-frequency signal to the product to be tested.

2. A TPMS automated production test device according to claim 1, characterized in that: The test control board also includes a current test module, which includes a precision operational amplifier, a sampling resistor, and an operational comparator to detect the static current of the tire pressure sensor.

3. The TPMS automated production test device according to claim 1, characterized in that: The test control board also includes a PCBA burning module, which includes an analog switch and a burning port, and the burning port is located between the MCU control module and the analog switch.

4. The TPMS automated production test device according to claim 1, characterized in that: The test control board also includes a data storage and aggregation module, which is connected to the MCU control module.

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