Remote real vehicle test system for nitrogen-oxygen sensor

Abstract

The utility model discloses a remote real vehicle test system for a nitrogen-oxygen sensor, which belongs to the technical field of sensor test and comprises a nitrogen-oxygen sensor test mechanism, an installation protection assembly, a server and a mobile terminal, and the nitrogen-oxygen sensor test mechanism is installed on a vehicle through the installation protection assembly. The nitrogen and oxygen sensor testing mechanism is in wireless connection with the server, the server is in wireless connection with the mobile terminal, all detection data are received through the signal conversion assembly and transmitted to the CAN bus-to-4G equipment, the CAN bus-to-4G equipment transmits CAN bus data to the server through a 4G network, and therefore remote monitoring is achieved; and the GPS positioning device converts the position information of the vehicle into a CAN bus format through an RS485 interface to a CAN bus, and finally sends the position information in a 4G signal form, so that the overall communication reliability of the system is improved, the test distance is increased, and more comprehensive data is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor testing, in particular to a remote real vehicle testing system for a nitrogen oxygen sensor. Background Art

[0002] The NOx sensor is used to measure the NOx concentration in the engine exhaust to meet the requirements of closed-loop control of the engine aftertreatment system and the needs of the on-board OBD diagnostic system. The actual vehicle test of the NOx sensor is an important step in the process of automobile research and development and production. Through the actual vehicle test, it can be ensured that the engine can effectively reduce NOx emissions under actual driving conditions and comply with environmental regulations and emission standards. In addition, the actual vehicle test can verify the performance of the NOx sensor under real road conditions. This helps to detect possible faults or failures of the NOx sensor as early as possible. By monitoring the sensor output and comparing it with the expected value, the sensor status can be monitored in real time, so as to carry out timely fault diagnosis and maintenance.

[0003] In general, the actual vehicle test of nitrogen oxide sensors is a key step to ensure the normal operation of the automobile emission control system, improve vehicle performance, reduce environmental pollution, and comply with regulatory requirements. Through testing under actual driving conditions, the working performance and reliability of nitrogen oxide sensors can be evaluated more comprehensively and realistically.

[0004] At present, some existing nitrogen oxide sensor test systems may face problems with data precision and accuracy during remote real-car testing. Due to the complexity of the test environment, the test equipment is complicated to install and difficult to fix, which poses driving risks and affects the credibility of the test results. Some systems may have some limitations in real-time performance and cannot provide instant test results. In automobile testing, real-time data is essential to ensure the performance and safety of the vehicle. Some traditional systems may have shortcomings in remote control and monitoring. For global testing, it is crucial to ensure remote real-time monitoring and control. Some systems may lack sufficient adaptability and cannot adapt to different types and brands of cars. In addition, some systems may lack good scalability when facing large-scale testing. For this reason, a remote real-car test system for nitrogen oxide sensors is proposed. Summary of the invention

[0005] The utility model aims to provide a remote vehicle testing system for a nitrogen oxide sensor to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a nitrogen oxygen sensor remote vehicle testing system, comprising a nitrogen oxygen sensor testing mechanism, an installation protection component, a server and a mobile terminal, wherein the nitrogen oxygen sensor testing mechanism is installed on the vehicle through the installation protection component, the nitrogen oxygen sensor testing mechanism is wirelessly connected to the server, and the server is wirelessly connected to the mobile terminal;

[0007] Among them, the nitrogen oxygen sensor testing mechanism includes a signal conversion component and a power supply and adjustment component. The signal conversion component includes a CAN bus to 4G device for data transmission and an electrical isolation protection for preventing equipment damage. The CAN bus to 4G device is wired to the electrical isolation protection.

[0008] As a further preferred embodiment of the present technical solution: the CAN bus to 4G device adopts the Guangcheng Technology GCAN-218CAN to 4G device, which is used to transmit the CAN bus data to the server through the 4G network, thereby realizing remote monitoring, and the installed electrical isolation protection can effectively prevent damage to the equipment due to instantaneous overcurrent or overvoltage, thereby improving the reliability of the system.

[0009] As a further preferred embodiment of the technical solution: the server receives and processes data transmitted from the CAN bus to the 4G device to realize the monitoring and analysis of the vehicle status, and the mobile terminal can automatically receive the data transmitted by the test system when each sensor is working, and when each sensor stops transmitting data, the dew point start instruction is remotely sent through the mobile terminal to make each sensor work offline, so as to detect the attenuation of the detection value of each sensor under the vehicle stationary condition after different working time.

[0010] As a further preferred embodiment of the present technical solution: the signal conversion component further includes an external expansion wiring harness, and the signal conversion component is connected to the power supply and regulation component through the external expansion wiring harness;

[0011] Among them, the power supply and regulation component includes a battery and a voltage regulation device. The battery and the voltage regulation device are wired and the battery adopts a 24V lithium battery to provide the power required for the overall operation of the system, while the voltage regulation device adopts a dip switch for configuring system parameters or switching working modes.

[0012] As a further preferred embodiment of the present technical solution: the nitrogen oxygen sensor testing mechanism further includes a GPS positioning device and a storage device, the signal conversion component is connected to the GPS positioning device through an external expansion harness, the power supply and adjustment component is connected to the GPS positioning device by wire, and the GPS positioning device adopts a Beidou satellite BD locator RS485 interface transmission module to achieve accurate positioning of the vehicle position;

[0013] The GPS positioning device includes a controller and a positioning antenna, the controller is connected to the positioning antenna, and the signal conversion component is connected to the storage device through an external expansion harness.

[0014] As a further preferred embodiment of the present technical solution: the installation protection component includes a protective shell, the nitrogen oxygen sensor test mechanism is installed in the protective shell, a magnetic base is installed at the bottom of the protective shell, the nitrogen oxygen sensor test mechanism is protected by the protective shell, and the arrangement of the magnetic base facilitates the installation of the signal conversion component;

[0015] Wherein, at least two straps are installed on both sides of the protective shell, and the straps are used to further enhance the fixation of the signal conversion component after installation.

[0016] As a further preferred embodiment of the present technical solution: the signal conversion component is respectively connected to the automobile ECU and the nitrogen oxide sensor through an external expansion harness, receives the data detected by the automobile ECU and the nitrogen oxide sensor through the above-mentioned setting, and transmits the data to the CAN bus to 4G device.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] In the utility model, all detection data are received by the signal conversion component, and the data is transmitted to the CAN bus to 4G device. The CAN bus to 4G device transmits the CAN bus data to the server through the 4G network, thereby realizing remote monitoring, and the GPS positioning device converts the vehicle's location information into the CAN bus format through the RS485 interface to the CAN bus, and finally sends it in the form of a 4G signal, thereby improving the overall communication reliability of the system, increasing the test distance and providing more comprehensive data;

[0019] The utility model can effectively prevent damage to the equipment due to instantaneous overcurrent or overvoltage through the electrical isolation protection installed, thereby improving the reliability of the system;

[0020] The utility model realizes direct adsorption of the whole system on the frame by installing the magnetic base in the protection component, thereby avoiding the complexity of the installation and fixed adsorption of the test equipment. At the same time, the straps provided by the utility model can further improve the fixation of the whole system when the closed road section is required for on-road testing, so that the system is more fixed on the frame and the driving risk is reduced.

[0021] The utility model uses the 24V lithium battery in the power supply and regulation component to provide the power required for the overall operation of the system, and can control the operation of each sensor individually when the vehicle is not running. The lithium battery is used to power the vehicle before it is powered on, and the vehicle is in a ready state, so that complete power-on data can be collected, thereby solving the problem that the traditional collector can only be powered on and receive messages after the vehicle is started, and avoiding the situation where the message is missing when the vehicle is started;

[0022] In the utility model, the server receives and processes the data transmitted from the CAN bus to the 4G device, so as to realize the monitoring and analysis of the vehicle status. The installed mobile terminal can automatically receive the data transmitted by the test system when the system is working, and when the system stops data transmission, the dew point start instruction is remotely sent through the mobile terminal to make the system work offline, so as to detect the attenuation of the detection value of each sensor under the vehicle static condition after different working time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a remote vehicle testing system for nitrogen and oxygen sensors of the utility model;

[0024] Figure 2 This is a structural schematic diagram of a signal conversion component in a remote vehicle testing system for a nitrogen and oxygen sensor of the utility model;

[0025] Figure 3 The utility model is a schematic diagram of the structure of the power supply and adjustment components in the remote vehicle testing system of nitrogen and oxygen sensors.

[0026] In the figure: 1. NOx sensor testing mechanism; 11. Signal conversion component; 111. CAN bus to 4G equipment; 112. Electrical isolation protection; 113. External expansion harness; 12. Power supply and adjustment component; 121. Battery; 122. Voltage adjustment device; 13. GPS positioning device; 14. Storage device; 2. Installation protection component; 21. Protective shell; 22. Magnetic base; 23. Strap; 3. Server; 4. Mobile terminal; 5. Automobile ECU; 6. NOx sensor. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0028] See also Figure 1-Figure 3 The utility model provides a technical solution: a nitrogen oxygen sensor remote vehicle test system, comprising a nitrogen oxygen sensor test mechanism 1, an installation protection component 2, a server 3 and a mobile terminal 4, wherein the nitrogen oxygen sensor test mechanism 1 is installed on the vehicle through the installation protection component 2, the nitrogen oxygen sensor test mechanism 1 is wirelessly connected to the server 3, and the server 3 is wirelessly connected to the mobile terminal 4;

[0029] Among them, the nitrogen oxygen sensor testing mechanism 1 includes a signal conversion component 11 and a power supply and adjustment component 12. The signal conversion component 11 includes a CAN bus to 4G device 111 for data transmission and an electrical isolation protection 112 for preventing equipment damage. The CAN bus to 4G device 111 is electrically connected to the electrical isolation protection 112 through a wire.

[0030] In this embodiment, specifically: the CAN bus to 4G device 111 is a GCAN-218 CAN to 4G device of Guangcheng Technology, which is used to transmit CAN bus data to the server 3 through the 4G network, thereby realizing remote monitoring, and the GPS positioning device 13 converts the vehicle's location information into a CAN bus format through the RS485 interface to the CAN bus, and finally sends it out in the form of a 4G signal;

[0031] The installed electrical isolation protection 112 can effectively prevent damage to the device due to instantaneous overcurrent or overvoltage, thereby improving the reliability of the system.

[0032] In this embodiment, specifically: the server 3 is set up to receive and process data transmitted from the CAN bus to the 4G device 111, so as to realize the monitoring and analysis of the vehicle status, and the installed mobile terminal 4 can automatically receive the data transmitted by the test system when the system is working, and when the system stops data transmission, the dew point start instruction is remotely sent through the mobile terminal 4 to make the system work offline, so as to detect the attenuation of the detection values ​​of each sensor under the vehicle static condition after different working time.

[0033] In this embodiment, specifically: the signal conversion component 11 further includes an external expansion harness 113, and the signal conversion component 11 is electrically connected to the power supply and adjustment component 12 through the external expansion harness 113;

[0034] The power supply and regulation component 12 includes a battery 121 and a voltage regulation device 122, and the battery 121 and the voltage regulation device 122 are electrically connected via a wire.

[0035] In this embodiment, specifically: the battery 121 is a 24V lithium battery that provides the power required for the overall operation of the system, and the installed voltage regulator 122 is a dip switch that can select 12V or 24V power supply, which is used to configure system parameters or switch working modes.

[0036] In this embodiment, specifically: the nitrogen oxygen sensor testing mechanism 1 also includes a GPS positioning device 13 and a storage device 14, the signal conversion component 11 is electrically connected to the GPS positioning device 13 through an external expansion harness 113, and the power supply and adjustment component 12 is electrically connected to the GPS positioning device 13 through a wire;

[0037] The GPS positioning device 13 includes a controller and a positioning antenna, the controller is electrically connected to the positioning antenna, and the signal conversion component 11 is electrically connected to the storage device 14 via an external expansion harness 113 .

[0038] In this embodiment, specifically: the installed GPS positioning device 13 adopts the Beidou satellite BD locator RS485 interface transmission module, and the set positioning antenna 13 is connected to the GPS-1000 module through the RS485 interface transmission module to achieve accurate positioning of the vehicle position.

[0039] In this embodiment, specifically: the installation protection component 2 includes a protective shell 21, the nitrogen oxygen sensor test mechanism 1 is installed in the protective shell 21, and a magnetic base 22 is installed at the bottom of the protective shell 21. The protective shell 21 is provided to protect the nitrogen oxygen sensor test mechanism 1, and the magnetic base 22 is provided to facilitate the installation of the signal conversion component 11;

[0040] At least two straps 23 are installed on both sides of the protective shell 21 , and the fixing of the signal conversion component 11 after installation can be further enhanced by the provided straps 23 .

[0041] In this embodiment, specifically: the signal conversion component 11 is electrically connected to the automobile ECU 5 and the nitrogen oxide sensor 6 through the external expansion harness 113, receives the data detected by the automobile ECU 5 and the nitrogen oxide sensor 6 through the above-mentioned setting, and transmits the data to the CAN bus to 4G device 111.

[0042] Working principle: When in use, by installing the magnetic base 22 in the protective component 2, the system can be directly adsorbed on the frame, thereby avoiding the complexity of the installation of the test equipment and fixed adsorption. At the same time, the strap 23 provided can further improve the fixation of the system as a whole when a closed road test is required, making it more fixed on the frame and reducing the risk of driving;

[0043] At this time, the signal conversion component 11 receives the data detected by the automobile ECU 5 and the nitrogen oxide sensor 6 through the external expansion harness 113, and transmits the data to the CAN bus to 4G device 111. The CAN bus to 4G device 111 transmits the CAN bus data to the server 3 through the 4G network, thereby realizing remote monitoring, and the GPS positioning device 13 converts the vehicle's location information into the CAN bus format through the RS485 interface to the CAN bus, and finally sends it in the form of a 4G signal. The installed electrical isolation protection 112 can effectively prevent damage to the equipment due to instantaneous overcurrent or overvoltage, thereby improving the reliability of the system;

[0044] At the same time, the installed GPS positioning device 13 adopts the Beidou satellite BD locator RS485 interface transmission module, and the set positioning antenna 13 is connected to the GPS-1000 module through the RS485 interface transmission module to achieve accurate positioning of the vehicle position;

[0045] The power required for the overall operation of the system is provided by the 24V lithium battery in the power supply and regulation component 12, and each sensor can be controlled to work independently when the vehicle is not running. The lithium battery is used to power the vehicle before it is powered on, and the vehicle is in a ready state, so that complete power-on data can be collected, thereby solving the problem that the traditional collector can only be powered on and receive messages after the vehicle is started, and avoiding the situation where the message is missing when the vehicle is started;

[0046] Finally, the server 3 is set up to receive and process the data transmitted from the CAN bus to the 4G device 111, so as to realize the monitoring and analysis of the vehicle status. The installed mobile terminal 4 can automatically receive the data transmitted by the test system when the system is working, and when the system stops data transmission, the dew point start instruction is remotely sent through the mobile terminal 4 to make the system work offline, so as to detect the attenuation of the detection values ​​of each sensor under the vehicle static condition after different working time.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen oxide sensor remote vehicle testing system, comprising a nitrogen oxide sensor testing mechanism (1), an installation protection component (2), a server (3) and a mobile terminal (4), characterized in that: The nitrogen oxygen sensor testing mechanism (1) is installed on a vehicle via an installation protection component (2), the nitrogen oxygen sensor testing mechanism (1) is wirelessly connected to a server (3), and the server (3) is wirelessly connected to a mobile terminal (4); The nitrogen oxide sensor testing mechanism (1) comprises a signal conversion component (11) and a power supply and regulation component (12); the signal conversion component (11) comprises a CAN bus to 4G device (111) for data transmission and an electrical isolation protection (112) for preventing device damage; the CAN bus to 4G device (111) is wiredly connected to the electrical isolation protection (112).

2. A remote vehicle testing system for nitrogen oxide sensors according to claim 1, characterized in that: The signal conversion component (11) further comprises an external expansion wiring harness (113), and the signal conversion component (11) is connected to the power supply and regulation component (12) via the external expansion wiring harness (113); The power supply and regulation component (12) comprises a battery (121) and a voltage regulation device (122), and the battery (121) and the voltage regulation device (122) are connected by wire.

3. A remote vehicle testing system for nitrogen and oxygen sensors according to claim 2, characterized in that: The nitrogen oxide sensor testing mechanism (1) further comprises a GPS positioning device (13) and a storage device (14); the signal conversion component (11) is connected to the GPS positioning device (13) via an external expansion harness (113); and the power supply and adjustment component (12) is connected to the GPS positioning device (13) via a wired connection; The GPS positioning device (13) comprises a controller and a positioning antenna, the controller is connected to the positioning antenna, and the signal conversion component (11) is connected to the storage device (14) via an external expansion harness (113).

4. A remote vehicle testing system for nitrogen oxide sensors according to claim 1, characterized in that: The installation protection assembly (2) comprises a protection shell (21), the nitrogen oxide sensor testing mechanism (1) is installed in the protection shell (21), and a magnetic base (22) is installed at the bottom of the protection shell (21); Wherein, at least two binding straps (23) are installed on both sides of the protective shell (21).

5. A remote vehicle testing system for nitrogen oxide sensors according to claim 2, characterized in that: The signal conversion component (11) is respectively connected to the automobile ECU (5) and the nitrogen oxide sensor (6) via an external expansion harness (113).

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