CN212231473U

CN212231473U - Handheld portable vehicle CAN bus network communication tester

Info

Publication number: CN212231473U
Application number: CN202021483858.5U
Authority: CN
Inventors: 田胜; 陈志鹏; 秦长城; 张海洋; 蔡金松
Original assignee: Anshan Jinhe Mining Co ltd
Current assignee: Anshan Jinhe Mining Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2020-12-25
Anticipated expiration: 2030-07-24

Abstract

The utility model relates to a handheld portable vehicle CAN bus network communication tester, a serial communication port, including casing, operating panel, be equipped with power indicator, CAN on operating panel and receive pilot lamp, OLED display screen, I mating switch of bus terminal resistance, II mating switch, operation menu button and binding post, be equipped with MCU singlechip, CAN physics interface chip, button input circuit and battery power supply circuit in the casing. The utility model has the advantages of small, with low costs, conveniently carry, test each position circuit of vehicle CAN network, from taking CAN bus terminal matched resistance, OLED screen clear demonstration daytime, supporting ISO11898 standard under, the test on the physical layer and the data link layer of a plurality of different baud rate CAN networks.

Description

Handheld portable vehicle CAN bus network communication tester

Technical Field

The utility model belongs to the technical field of automobile inspection, a car module network communication test equipment is related to, especially, relate to a handheld portable vehicle CAN bus network communication tester.

Background

With the development of automobile electrical technology, the number of vehicle-mounted control modules is increased, the CAN bus network communication technology between modules is widely used, and when the automobile CAN bus network or the automobile modules have faults, for example: the CAN bus network is in poor contact, short circuit, open circuit, bonding, node off-line, data transmission frame loss, terminal resistance error fault and the like, a special CAN bus network analyzer or a CAN detection board card is usually required to carry out inspection and test on a CAN bus network physical layer and a data connection layer, but the CAN bus network test equipment is used after being connected with a desktop computer or a notebook computer by the traditional CAN bus network test equipment, and is inconvenient to carry out CAN bus network test under a vehicle chassis, particularly to maintain CAN bus network faults of a truck, an engineering machine and a passenger car.

Disclosure of Invention

The utility model aims at providing a small, with low costs, simple structure, convenient operation's handheld portable vehicle CAN bus network communication tester.

The utility model discloses a hand-held portable vehicle CAN bus network communication tester, which is characterized in that the tester comprises a shell, an operating panel arranged on the shell, a power indicator, a CAN communication indicator, an OLED display screen, a bus terminal resistance I matching switch, a bus terminal resistance II matching switch, an operation menu button and a wiring terminal arranged on the operating panel, a MCU singlechip, a CAN physical interface chip, a key input circuit and a battery power circuit arranged in the shell, the MCU singlechip is respectively connected with the key input circuit, the battery power circuit and the OLED display screen, the MCU singlechip is connected with the CAN physical interface chip through the wiring terminal, the CAN physical interface chip is also connected into a tested vehicle CAN bus network through a test terminal and is matched through the bus terminal matching resistor, and the address and data information of a module node conforming to SAE J1939 protocol in the tested vehicle CAN bus are analyzed, and testing is carried out, and the testing result is displayed on the OLED display screen in a numerical value mode.

As the further optimization of the utility model, the MCU singlechip is a singlechip of STM32F103C8T6 type; the model of the physical interface chip is TJA 1050; the OLED display screen is a 1.3-inch display screen.

As the utility model discloses a further optimization will the matching resistance at CAN bus terminal match with the CAN network bus resistance of the vehicle tested.

As the utility model discloses a further optimization, the vehicle CAN network that tests adopts the baud rate to test for 5Kbps, 125Kbps, 250Kbps and 500 Kbps's message frame rate.

The utility model has the advantages that: the device has the advantages of small volume, low cost, simple structure and convenient operation, adopts a 9V battery for power supply, and CAN carry out connection test on the wiring harness and CAN bus network line nodes distributed on the electronic module by holding the positions of a vehicle chassis, a cab and a carriage.

The utility model discloses with CAN network monitoring mode access by test bus, do not influence other electronic module of vehicle and normally communicate.

The setting of a plurality of function button and display screen on the operating panel not only has that detection speed is fast, and is directly perceived moreover, has advantages such as the test is nimble, the test result is accurate moreover, has improved the work efficiency that detects effectively, and convenience of customers transfers different test functions in a flexible way.

Drawings

Fig. 1 is the structure block diagram of the hand-held portable vehicle CAN bus network communication tester of the utility model.

Fig. 2 is an outline view of the casing of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the utility model discloses a hand-held portable vehicle CAN network bus communication tester, a serial communication port, including casing 1, the operating panel who sets up on casing 1 is equipped with power indicator 2, CAN communication indicator 3, OLED display screen 6, bus termination resistance I matching switch 4, bus termination resistance II matching switch 5, operation menu button and binding post 12 on operating panel, the operation menu button include "page select" button 7, "go select" button 8, "return" button 9, "confirm" button 10 and switch 11; an MCU single chip microcomputer, a CAN physical interface chip, a key input circuit and a battery power supply circuit are arranged in a shell body 1, the MCU single chip microcomputer is respectively connected with the key input circuit, the battery power supply circuit and an OLED display screen, the MCU single chip microcomputer is connected with the CAN physical interface chip through a wiring terminal, the CAN physical interface chip is also connected into a tested vehicle CAN bus network through a test terminal and is matched through a bus terminal matching resistor, module node addresses and data information which accord with SAE J1939 protocol in the tested vehicle CAN bus are analyzed and tested, and a test result is displayed on the OLED display screen in numerical value,

the battery power supply of the utility model adopts a 9V battery for power supply; the MCU singlechip is an STM32F103C8T6 type singlechip; the model of the physical interface chip is TJA 1050; the OLED display screen is a 1.3-inch display screen.

The utility model discloses will CAN bus terminal matched resistance match with the CAN network bus resistance of the vehicle that tests, utilize CANL and CANH resistance matching function to test the numerical value matching of vehicle network bus resistance, discern and the voltage conversion through CAN physics interface chip data on to CAN network bus, the level data signal of conversion send to MCU singlechip inside carry out CAN data connection layer and handle the back, each frame CAN ID and data value that will finally discern test and show relevant information according to user function selection.

The utility model discloses handheld portable vehicle CAN network bus tester's user CAN select multiple CAN communication baud rate to carry out the message and receive the test, test vehicle CAN network adopt the baud rate to test for 5Kbps, 125Kbps, 250Kbps and 500 Kbps' message frame rate to CAN count the CAN message of receipt, the user CAN carry out address search to the electronic module that the vehicle accords with SAE J1939 agreement, the on-line module function name that will search for directly shows on the display screen. The utility model discloses support under the ISO11898 standard, the test on the physical layer and the data link layer of a plurality of different baud rate CAN networks.

Application method

The user uses CANL and CANH connecting lines to access the tested vehicle CAN bus network, and after K31 is connected with the negative pole of the vehicle power supply, the power switch 11 is turned on, the resistance value matching of the test bus network is carried out by using the matching of two terminal resistors, after the page selection key or the row selection key is pressed, the corresponding menu function is selected, and then the 'confirm' key is pressed to enter the required test item. And judging the range and the type of the fault of the CAN bus network of the tested vehicle according to the display result of the test.

Claims

1. A hand-held portable vehicle CAN bus network communication tester is characterized by comprising a machine shell, an operation panel arranged on the machine shell, a power indicator, a CAN communication indicator, an OLED display screen, a bus terminal resistor I matching switch, a bus terminal resistor II matching switch and a wiring terminal which are arranged on the operation panel, wherein an MCU singlechip microprocessor, a CAN physical interface chip, a key input circuit and a battery power circuit are arranged in the machine shell, the MCU singlechip is respectively connected with the key input circuit, the battery power circuit and the OLED display screen, the MCU singlechip is connected with the CAN physical interface chip through the wiring terminal, the CAN physical interface chip is also connected into a tested vehicle CAN bus through a test terminal and is matched through the terminal bus matching resistor to analyze the address and data information of a module node in accordance with SAE J1939 protocol in the tested vehicle CAN bus, and testing is carried out, and the testing result is displayed on the OLED display screen in a numerical value mode.

2. The hand-held portable vehicle CAN bus network communication tester as claimed in claim 1, wherein the MCU is a STM32F103C8T6 type single chip microcomputer; the model of the physical interface chip is TJA 1050; the OLED display screen is a 1.3-inch display screen.

3. The hand-held portable vehicle CAN bus network communication tester of claim 1, wherein the CAN bus terminal matching resistance is matched with the CAN bus network resistance of the vehicle under test quickly by a bus terminal resistance I matching switch and a bus terminal resistance II matching switch.

4. The hand-held portable vehicle CAN bus network communication tester as claimed in claim 1, wherein the tested vehicle CAN bus network performs counting, frame rate and node search tests using packet frame rates with baud rates of 5Kbps, 125Kbps, 250Kbps and 500 Kbps.