Automobile sensor three-temperature-zone test system and device

Abstract

The utility model discloses an automobile sensor three-temperature-zone test system and device. The device comprises an upper computer, an industrial personal computer, an incubator, a cabinet, a real-time data acquisition module, a power supply module, an RS232 serial port module, an RS422 serial port module, a DB15 core bus and a digital multimeter. The upper computer is connected with the industrial personal computer, and the industrial personal computer is respectively connected with the incubator, the real-time data acquisition module and the power supply module; the incubator is used for providing a test environment for a sensor test; the real-time data acquisition module is respectively connected with the RS232 serial port module, the RS422 serial port module and the digital multimeter; the RS232 serial port module and the RS422 serial port module are used for monitoring digital signals of the test sensor; the digital multimeter is used for monitoring analog signals of the test sensor; and the power supply module is arranged in the cabinet and is used for supplying power to the test sensor and providing power supply voltage. According to the utility model, high and low temperature environment tests on a large batch of sensors can be realized, output analog signals or digital signals can be detected, and data can be displayed and stored on an upper computer in real time.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a three-temperature zone testing system and device for automotive sensors. Background Technology

[0002] Sensors interact with the external environment through their sensitive elements, effectively sensing the physicochemical information of their installation location. Therefore, sensors are widely used in aircraft, automobiles, ships, and consumer electronics, providing crucial information to their superior systems. However, different environmental stresses arise during research and development, production, transportation, and storage, leading to reliability issues such as excessive performance drift and decreased output stability. To address this problem, environmental testing systems are needed to simulate the environmental stresses faced by sensors at each stage. By monitoring the sensor's output signal during environmental testing, the sensor's reliability can be evaluated.

[0003] For high and low temperature environment testing of sensors, existing testing equipment basically only has one temperature zone, and the power supply of the sensor needs to be equipped with an external power supply. It also faces problems such as difficulty in setting up the testing system and low testing efficiency. Utility Model Content

[0004] The main purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to propose a three-temperature zone test system and device for automotive sensors. This system realizes a three-temperature zone reliability test system for sensors with multiple temperature zones, large batch production, and self-powered power supply, providing effective support for improving sensor reliability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A three-temperature zone test system for automotive sensors is provided, consisting of a host computer and an industrial control computer, including a temperature chamber, a real-time data acquisition module, a power supply module, an RS232 serial port module, an RS422 serial port module, a DB15 core bus, and a digital multimeter.

[0007] The host computer is connected to the industrial control computer, which in turn is connected to the temperature chamber, the real-time data acquisition module, and the power supply module.

[0008] The temperature chamber, controlled by an industrial computer or manually, provides a test environment for sensor testing.

[0009] The real-time data acquisition module is connected to the RS232 serial port module, the RS422 serial port module, and the digital multimeter, respectively, to acquire digital or analog signals output by the test sensors.

[0010] The RS232 and RS422 serial port modules are connected to the test sensors inside the temperature chamber via a DB15 core bus to monitor the digital signals of the test sensors.

[0011] The digital multimeter is connected to the test sensor inside the temperature chamber via a DB15 core bus to monitor the analog signals of the test sensor;

[0012] The power module is connected to the test sensor inside the temperature chamber via a DB15 core bus and is used to power the test sensor and provide the test voltage.

[0013] The industrial computer is used for setting the temperature of the temperature chamber and supplying power to the test sensors via the power module. It is also used to collect data from the real-time data acquisition module and transmit it to the host computer.

[0014] The host computer is used for user interaction and operation, including the configuration of the temperature chamber, power module, RS232 serial port module and RS422 serial port module, real-time test data display and test data storage management.

[0015] Furthermore, it also includes a power distribution system for obtaining power from an external power source and distributing it to the various components of the automotive sensor three-temperature zone test system.

[0016] Furthermore, it also includes an audible and visual alarm module, which specifically includes a speaker and indicator lights, used to provide audible and visual alarm prompts when the test unexpectedly stops.

[0017] This utility model also includes a three-temperature zone test device for automotive sensors, which is equipped with a host computer and an industrial control computer, including a cabinet, a temperature chamber, a real-time data acquisition module, a power supply module, an RS232 serial port module, an RS422 serial port module, a DB15 core bus, and a digital multimeter.

[0018] The host computer is connected to the industrial control computer, which in turn is connected to the temperature chamber, the real-time data acquisition module, and the power supply module.

[0019] The real-time data acquisition module is connected to the RS232 serial port module, the RS422 serial port module, and the digital multimeter, respectively; the RS232 serial port module and the RS422 serial port module are connected to the test sensors in the temperature chamber via the DB15 core bus; the digital multimeter is connected to the test sensors in the temperature chamber via the DB15 core bus; and the power supply module is connected to the test sensors in the temperature chamber via the DB15 core bus.

[0020] The industrial control computer, host computer, temperature chamber, real-time data acquisition module, power supply module, RS232 serial port module, RS422 serial port module, DB15 core bus and digital multimeter are installed in the cabinet.

[0021] The DB15 core bus adopts the DB15 metal junction box form;

[0022] The temperature chamber is located at the rear of the cabinet, while the industrial control computer, host computer, real-time data acquisition module, power supply module, RS232 serial port module, RS422 serial port module, and digital multimeter are located at the front of the cabinet. The DB15 metal junction box is located in the middle of the cabinet.

[0023] Furthermore, the chamber is equipped with a honeycomb metal plate and copper pillars, and a metal bracket is fixed thereon. The honeycomb metal plate is fixed on the metal bracket, and the honeycomb metal plate and copper pillars are used to fix the sensor.

[0024] There are three temperature chambers arranged side by side. Each temperature chamber has 32 workstations, which are divided into two groups. Each workstation corresponds to one test sensor.

[0025] Furthermore, the RS232 serial port module specifically uses an RS232 interface, and the RS422 serial port module specifically uses an RS422 interface;

[0026] Each station inside the incubator is equipped with an RS232 interface and an RS422 interface;

[0027] The digital multimeter supports a patrol mode, allowing for cyclic measurements at multiple workstations to detect the voltage or current output by the sensors.

[0028] Furthermore, the power supply module consists of three DC power supplies, totaling six sets. Each temperature chamber has two sets of power supplies, and the sensors at each workstation are powered by a parallel power supply.

[0029] Furthermore, it also includes a power distribution system for obtaining power from an external power source and distributing it to the various components of the automotive sensor three-temperature zone test device; the power distribution system is located outside the cabinet.

[0030] Furthermore, it also includes an audible and visual alarm device, which specifically includes a speaker and indicator lights, used to provide audible and visual alarm prompts when the test unexpectedly stops; the audible and visual alarm device is installed on the outer surface of the cabinet.

[0031] Furthermore, it also includes a display screen; the display screen is fixed on the cabinet and is used to display information and interfaces output by the host computer.

[0032] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0033] 1. This utility model enables high and low temperature environment testing of sensors, and can detect and output analog or digital signals in real time, and can display and store data in real time on a host computer.

[0034] 2. This utility model has its own built-in sensor power supply, so no external power supply is required when conducting reliability tests.

[0035] 3. This utility model is equipped with three temperature chambers, each of which is a temperature zone, and the three temperature zones can operate independently. Each temperature zone has 32 sensor test stations, which can realize batch testing capabilities.

[0036] 4. This utility model is equipped with comprehensive protection functions. Each power supply is equipped with independent and comprehensive overvoltage, undervoltage, overcurrent, short circuit and overtemperature protection; the temperature chamber is equipped with overtemperature protection and leakage protection. In addition, this utility model is equipped with an alarm module, which can provide audible and visual alarm prompts when the test is unexpectedly stopped. After the alarm is triggered, the temperature chamber will automatically stop heating. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the three-temperature zone test device for automotive sensors in the embodiment;

[0038] Figure 2 This is a schematic diagram of the three-temperature zone test device for automotive sensors in the embodiment;

[0039] Figure 3 This is a front view of the three-temperature zone test device for automotive sensors in the embodiment;

[0040] Figure 4 This is a schematic diagram of the equipment space layout of the three-temperature zone test device for automotive sensors in the embodiment;

[0041] Figure 5 This is a schematic diagram of a honeycomb metal panel;

[0042] Figure 6 This is a schematic diagram of the terminal array in the front panel terminal box. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0044] Example

[0045] like Figure 1 and Figure 4 As shown, this utility model discloses a three-temperature zone test device for automotive sensors, which includes a cabinet, an industrial computer, a host computer, a temperature chamber, a real-time data acquisition module, a power supply module, an RS232 interface, an RS422 interface, a DB15 core bus, and a digital multimeter.

[0046] The host computer connects to the industrial control computer, which in turn connects to the temperature chamber, the real-time data acquisition module, and the power supply module. The real-time data acquisition module is connected to an RS232 interface, an RS422 interface, and a digital multimeter. The RS232 and RS422 interfaces are connected to the test sensors inside the temperature chamber via a DB15 bus. The digital multimeter is also connected to the test sensors inside the temperature chamber via a DB15 bus. The power supply module is also connected to the test sensors inside the temperature chamber via a DB15 bus.

[0047] The industrial control computer, host computer, temperature chamber, real-time data acquisition module, power supply module, RS232 interface, RS422 interface, DB15 core bus and digital multimeter are installed in the cabinet;

[0048] The DB15 core bus adopts the DB15 metal junction box form;

[0049] like Figure 4 As shown, the temperature chamber is located at the rear of the cabinet, while the industrial control computer, host computer, real-time data acquisition module, power supply module, RS232 interface, RS422 interface, and digital multimeter are located at the front of the cabinet. The DB15 metal junction box is located in the middle of the cabinet.

[0050] The temperature chamber is controlled by an industrial computer or manually to provide the test environment for sensor testing. A real-time data acquisition module collects digital or analog signals output by the test sensors. RS232 and RS422 interfaces monitor the digital signals of the test sensors. A digital multimeter monitors the analog signals of the test sensors. A power supply module provides the test voltage to the test sensors. The industrial computer sets the temperature of the temperature chamber and supplies power to the test sensors. It also collects data from the real-time data acquisition module and transmits it to the host computer. The host computer is used for user interaction and operation, including configuring the temperature chamber, power supply module, RS232 interface, and RS422 interface; displaying real-time test data; and managing test data storage.

[0051] like Figure 2 and Figure 3 The diagram shows the overall schematic and front view of the test apparatus. In this embodiment, the cabinet dimensions are 1800mm (width) * 1500mm (depth) * 1850mm (height). The overall operating conditions of the automotive sensor three-temperature zone test apparatus are as follows:

[0052] Ambient temperature: 0℃~45℃;

[0053] Relative humidity: ≤80% RH;

[0054] Input power: AC220V±10%, 12KW;

[0055] Surrounding environment: free from corrosive gases, strong magnetic interference, and good heat dissipation and ventilation.

[0056] In this embodiment, the incubator contains a honeycomb metal plate and copper pillars, and a metal bracket is fixed thereon; the honeycomb metal plate (approximately 250mm*300mm) is fixed to the metal bracket, and the honeycomb metal plate, together with the copper pillars, is used to fix the sensor, such as... Figure 5 The diagram shows a schematic of a honeycomb metal panel. There are three temperature chambers arranged side-by-side, each serving as a temperature zone. Each temperature chamber has 32 workstations, divided into two groups, with each workstation corresponding to one test sensor. Each workstation within the temperature chamber is equipped with both an RS232 interface and an RS422 interface. The basic parameters of the temperature chamber in this embodiment are configured as follows:

[0057] Nominal volume: 30L;

[0058] Temperature range: -55℃ to 175℃;

[0059] Temperature fluctuation: 0.5℃;

[0060] Temperature error: ≤100℃: ±2.0℃; >100℃: ±4.0℃;

[0061] Protection functions: It comes with over-temperature protection and leakage protection, and can automatically stop heating after an over-temperature alarm.

[0062] This embodiment uses a terminal box wiring method. The DB15 core bus uses DB15 metal junction boxes, and the number of DB15 metal junction boxes corresponds to the number of workstations. The RS232 and RS422 interfaces are connected to the test sensors inside the temperature chamber through the DB15 core bus terminals. This embodiment also includes a front panel terminal box, which is located on the front panel of the cabinet and provides... Figure 6 The terminal array shown has all signals on the DB15 interface. Users can complete the wiring inside the DB15 metal junction box and then plug it in according to their actual usage.

[0063] The digital multimeter supports a patrol mode, allowing for rapid cyclic measurement across multiple workstations to detect the voltage or current output of sensors. The technical performance specifications for analog voltage detection at sensor workstations are as follows:

[0064] Gear position detection range: ±1V, ±5V, ±10V;

[0065] Resolution: 0.01V (±10V) / 1mV (±1V / ±5V);

[0066] Measurement error: ±0.1%FS±2LSB;

[0067] Gear shifting method: Specify a gear before the test. During continuous measurement, the gear will automatically switch to the next gear if the current range is exceeded by 1 minute.

[0068] In this embodiment, the power supply module is specifically a three-way DC power supply, with a total of 6 sets. Each temperature chamber corresponds to two sets of power supplies, and the sensors of each workstation are powered by a parallel power supply.

[0069] The power supply can operate in two modes: local operation and programmable control. Local operation allows manual adjustment / setting of power supply test parameters. Programmable control mode automatically starts output based on the set voltage (each power supply has 3 outputs, which can be configured on the host computer to output all 3 channels simultaneously or only a specified channel). Each power supply is equipped with independent and comprehensive overvoltage, undervoltage, overcurrent, short circuit, and overtemperature protection.

[0070] The power supply parameters are shown in Table 1 below.

[0071]

[0072] Table 1

[0073] In this embodiment, a power distribution system and an audible and visual alarm device are also provided. The power distribution system is used to obtain power from the power supply and distribute it to each component of the automotive sensor three-temperature zone test device. The power distribution system is located outside the cabinet. The audible and visual alarm device specifically includes a speaker and a signal light, which are used to provide audible and visual alarm prompts when the test unexpectedly stops. The audible and visual alarm device is located on the outer surface of the cabinet.

[0074] In this embodiment, a display screen and a keyboard and mouse are also included. The display screen is fixed on the cabinet and is used to display information and the interface output by the host computer. The keyboard and mouse are used for user input to the host computer. In actual implementation, the host computer software and database can be customized. The host computer software adopts a Windows-based Chinese menu display interface to achieve intuitive display, convenient operation, and data storage. The host computer software can be configured with functions such as setting an administrator password, advanced settings (number of power supplies, whether the temperature chamber is programmable, whether the power supply is programmable, temperature chamber serial port configuration, power supply serial port configuration, serial port configuration, default path, and workstation serial port configuration table), setting test parameters, and alarm prompts.

[0075] In this embodiment, the device is divided into 6 test areas according to the power supply. Each area can start and stop the test independently. For example, when the first group is outputting, stations 1-16 are powered on for testing at the same time, and when stopping, they are all powered off to stop the test.

[0076] The device startup test in this embodiment includes the following steps:

[0077] A. The sensor to be tested is installed and fixed inside the temperature chamber using a honeycomb metal plate and copper pillars;

[0078] B. Connect the pins of the sensor under test to the corresponding pins of the DB15 bus terminals using wires;

[0079] C. Open the host computer and enter the test batch number name and data storage path;

[0080] D. Set the power supply for the current test group to provide a power-on working environment for the sensor under test;

[0081] E. Set the test program for the current test group's temperature chamber to provide a temperature test environment for the sensor under test;

[0082] F. Perform the test run, and apply test conditions to the device according to the set parameters and the selected test area;

[0083] H. After the test is completed, remove the sensor under test and store the test data.

[0084] In addition, if the experiment stops unexpectedly, it can be resumed manually according to the parameters set at the time of the stop. When it is necessary to stop the experiment, a single-channel or multi-channel stop operation can be performed. There are two ways to stop the experiment: automatic stop when the experiment timer expires, and manual stop by selecting the stop button.

[0085] During the test, the device monitors data in real time, including temperature in the high and low temperature chamber, voltage values ​​at sensor stations, and analog or digital signals from sensor stations, and displays and stores this data in the host computer. The host computer uses a database to manage data files, preprocesses the stored real-time data, and can also export the actual stored data to an Excel spreadsheet for later analysis. Data storage intervals are controlled independently for the six test areas. For each test, two types of files can be generated and stored according to batch number: one for rapid storage (generated daily) and one for fixed-interval storage (allowing for playback of curves to view aging trends).

[0086] It should also be noted that, in this specification, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The above description of the disclosed embodiments enables those skilled in the art to make or use 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 disclosed herein.

Claims

1. A three-temperature zone testing system for automotive sensors, comprising a host computer and an industrial control computer, characterized in that, It includes a temperature chamber, a real-time data acquisition module, a power supply module, an RS232 serial port module, an RS422 serial port module, a DB15 core bus, and a digital multimeter; The host computer is connected to the industrial control computer, which in turn is connected to the temperature chamber, the real-time data acquisition module, and the power supply module. The temperature chamber, controlled by an industrial computer or manually, provides a test environment for sensor testing. The real-time data acquisition module is connected to the RS232 serial port module, the RS422 serial port module, and the digital multimeter, respectively, to acquire digital or analog signals output by the test sensors. The RS232 and RS422 serial port modules are connected to the test sensors inside the temperature chamber via a DB15 core bus to monitor the digital signals of the test sensors. The digital multimeter is connected to the test sensor inside the temperature chamber via a DB15 core bus to monitor the analog signals of the test sensor; The power module is connected to the test sensor inside the temperature chamber via a DB15 core bus and is used to power the test sensor and provide the test voltage. The industrial computer is used for setting the temperature of the temperature chamber and supplying power to the test sensors via the power module. It is also used to collect data from the real-time data acquisition module and transmit it to the host computer. The host computer is used for user interaction and operation, including the configuration of the temperature chamber, power module, RS232 serial port module and RS422 serial port module, real-time test data display and test data storage management.

2. The automotive sensor three-temperature zone test system according to claim 1, characterized in that, It also includes a power distribution system for obtaining power from an external power source and distributing it to the various components of the automotive sensor three-temperature zone test system.

3. The automotive sensor three-temperature zone test system according to claim 1, characterized in that, It also includes an audible and visual alarm module, which specifically includes a speaker and indicator lights, used to provide audible and visual alarm prompts when the test unexpectedly stops.

4. A three-temperature zone testing device for automotive sensors, comprising a host computer and an industrial control computer, characterized in that, It includes a cabinet, a temperature chamber, a real-time data acquisition module, a power supply module, an RS232 serial port module, an RS422 serial port module, a DB15 core bus, and a digital multimeter; The host computer is connected to the industrial control computer, which in turn is connected to the temperature chamber, the real-time data acquisition module, and the power supply module. The real-time data acquisition module is connected to the RS232 serial port module, the RS422 serial port module, and the digital multimeter, respectively; the RS232 serial port module and the RS422 serial port module are connected to the test sensors inside the temperature chamber via a DB15 core bus; The digital multimeter is connected to the test sensors inside the temperature chamber via a DB15 core bus; The power module is connected to the test sensors inside the temperature chamber via a DB15 core bus; The industrial control computer, host computer, temperature chamber, real-time data acquisition module, power supply module, RS232 serial port module, RS422 serial port module, DB15 core bus and digital multimeter are installed in the cabinet. The DB15 core bus adopts the DB15 metal junction box form; The temperature chamber is located at the rear of the cabinet, while the industrial control computer, host computer, real-time data acquisition module, power supply module, RS232 serial port module, RS422 serial port module, and digital multimeter are located at the front of the cabinet. The DB15 metal junction box is located in the middle of the cabinet.

5. The automotive sensor three-temperature zone testing device according to claim 4, characterized in that, The chamber contains a honeycomb metal plate and copper pillars, and a metal bracket is fixed thereon. The honeycomb metal plate is fixed on the metal bracket, and the honeycomb metal plate and copper pillars are used to fix the sensor. There are three temperature chambers arranged side by side. Each temperature chamber has 32 workstations, which are divided into two groups. Each workstation corresponds to one test sensor.

6. The automotive sensor three-temperature zone testing device according to claim 5, characterized in that, The RS232 serial port module specifically uses an RS232 interface, while the RS422 serial port module specifically uses an RS422 interface. Each station inside the incubator is equipped with an RS232 interface and an RS422 interface; The digital multimeter supports a patrol mode, allowing for cyclic measurements at multiple workstations to detect the voltage or current output by the sensors.

7. The automotive sensor three-temperature zone testing device according to claim 4, characterized in that, The power supply module consists of three DC power supplies, with a total of six sets. Each temperature chamber has two sets of power supplies, and the sensors at each workstation are powered by a parallel power supply.

8. The automotive sensor three-temperature zone testing device according to claim 4, characterized in that, It also includes a power distribution system for obtaining power from an external power source and distributing it to the various components of the automotive sensor three-temperature zone test device; the power distribution system is located outside the cabinet.

9. The automotive sensor three-temperature zone testing device according to claim 4, characterized in that, It also includes an audible and visual alarm device, which specifically includes a speaker and indicator lights, used to provide audible and visual alarm prompts when the test unexpectedly stops; the audible and visual alarm device is installed on the outer surface of the cabinet.

10. The automotive sensor three-temperature zone testing device according to claim 4, characterized in that, It also includes a display screen; the display screen is fixed on the cabinet and is used to display information and interface output by the host computer.

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