CN210707124U

CN210707124U - Warning display system based on automobile OBD2

Info

Publication number: CN210707124U
Application number: CN201920954035.7U
Authority: CN
Inventors: 谢佳威; 马秋宇
Original assignee: Chengdu Perthi Technology Co Ltd
Current assignee: Chengdu Perthi Technology Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-06-09
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to an automobile safety equipment technical field, concretely relates to warning display system based on car OBD2, including setting up OBD2 system and external DC power supply in the car, OBD2 system signal connection has signal transmitter, external DC power supply's electric energy output end links to each other with signal transmitter's electric energy receiving terminal, signal transmitter is connected with the EL display piece and drives EL display piece and show, the signal output part of OBD2 system with signal transmitter's signal receiving terminal links to each other, signal transmitter's signal output part links to each other with the display drive end of EL display piece, the EL display piece sets up on the rear windshield of car for show the speed of travel, rotational speed and the gear of car on the rear windshield; its aim at solves the display screen installation among the current display device inconvenient and the display screen among the display device in the problem that the display effect is not good night and foggy day.

Description

Warning display system based on automobile OBD2

Technical Field

The utility model relates to an automobile safety equipment technical field particularly, relates to a warning display system based on car OBD 2.

Background

With the increasing number of people purchasing cars in China, vehicles in a road form are more and more, and in the process of vehicle running, the phenomenon of rear-end collision can occur, the main reason is that the rear car cannot accurately judge the running state of the front car and cannot accurately know the running speed of the front car, so that a practical system is needed to facilitate the rear car to observe information such as the running speed of the front car.

The OBD2 is a second generation system of automobile diagnosis, which is the standard of OBD2 established by the American society of automotive Engineers in 1988, and the standard detection procedure is carried out by the OBD 2.

The invention patent with the application number of 201410792174.6 also discloses a wireless vehicle speed display warning indicator, wherein a color LED screen is used for displaying information such as vehicle speed of a vehicle, so that the vehicle can be observed conveniently and warning effects can be achieved, but when the LED screen is used for displaying, the LED display screen has the problems of inconvenient installation, difficult observation and clarity at night and in foggy days, and the like, so a warning display system based on the vehicle OBD2 is needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a warning display system based on car OBD2, the display screen installation among its aim at solution current display device is inconvenient and the display screen among the display device is at the not good problem of display effect night and foggy day.

The embodiment of the utility model is realized like this:

the utility model provides a warning display system based on car OBD2, is including setting up OBD2 system and external DC power supply in the car, OBD2 system signal connection has signal transmitter, external DC power supply's electric energy output end links to each other with signal transmitter's electric energy receiving terminal, signal transmitter is connected with EL display piece and drives the EL display piece and show, OBD2 system's signal output part with signal transmitter's signal receiving terminal links to each other, signal transmitter's signal output part links to each other with the demonstration drive end of EL display piece, the EL display piece sets up on the rear windshield of car for show the speed of travel, rotational speed and the gear of car on the rear windshield.

The technical scheme is that the electric energy output end of the external direct current power supply is connected with the electric energy receiving end of the MCU main control board and the electric energy receiving end of the inverter, the electric energy output end of the inverter is connected with the electric energy receiving end of the EL display piece, the signal receiving end of the MCU main control board is connected with the signal output end of the OBD2 system, and the signal output end of the MCU main control board is connected with the signal receiving end of the EL display piece.

The further technical scheme is that the MCU main control board comprises an OBD2 communication circuit, an STM32 bit singlechip, an optical coupling isolation circuit, a silicon controlled circuit and a DC-DC buck converter;

the OBD2 communication circuit is connected with a signal output end of the OBD2 system through a USB connector, a signal receiving end of the STM 32-bit singlechip is connected with a signal output end of the OBD2 communication circuit, a signal receiving end of the optical coupling isolation circuit is connected with a signal output end of the STM 32-bit singlechip, a signal receiving end of the silicon controlled rectifier circuit is connected with a signal output end of the optical coupling isolation circuit, and a signal receiving end of the EL display piece is connected with a signal output end of the silicon controlled rectifier circuit;

the electric energy receiving end of the STM32 bit single chip microcomputer is connected with the electric energy output end of the DC-DC buck converter, and the electric energy receiving end of the DC-DC buck converter is connected with the electric energy output end of the external direct current power supply;

and the electric energy receiving end of the silicon controlled rectifier circuit is connected with the electric energy output end of the inverter, and the electric energy receiving end of the EL display piece is connected with the electric energy output end of the silicon controlled rectifier circuit.

The further technical scheme is that the external direct current power supply is a DC12V power supply, the inverter is a DC12V inverter, and the DC-DC buck converter is a DC12V-DC5V buck converter.

The embodiment of the utility model provides a beneficial effect is: the OBD2 system signal is connected through the signal transmitter, and the signal is transmitted to the EL display piece to be displayed, so that the information such as the driving speed, the rotating speed, the gear position and the like of the vehicle can be displayed on the rear windshield to the rear vehicle, the rear vehicle can conveniently and timely react and adjust, the information such as the vehicle speed and the like can be displayed through the EL display piece, the uniform astigmatism is realized, no dazzling is caused to the vision, no harm is caused, the light gathering and penetrating power are strong, the bright and striking display can be realized at night and in foggy days, the display effect of the rear vehicle can be well realized, the EL display piece is simple to install, the energy is saved, the environment is protected, and the installation cost and the power saving effect can be.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a block diagram of signal connections among the OBD2 system, the external dc power supply, the signal transmitter and the EL display panel according to the present invention;

fig. 2 is a block diagram of signal connections among the OBD2 system, the external dc power supply, the MCU main control board, the inverter, and the EL display panel according to the present invention;

FIG. 3 is a block diagram of the structure inside the MCU master control board of the present invention;

fig. 4 is a block diagram of a warning display system based on an automobile OBD2 according to the present invention;

fig. 5 is a partial circuit connection diagram between the optocoupler isolation circuit and the thyristor circuit according to the present invention;

FIG. 6 is a circuit diagram of a portion of an EL display panel according to the present invention;

FIG. 7 is a schematic view of a bit EL display panel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Examples

Referring to fig. 1-7, the present embodiment provides a warning display system based on an automobile OBD2, where the display system includes an OBD2 system and an external dc power supply, the OBD2 system is connected to a signal transmitter, an electric energy output end of the external dc power supply is connected to an electric energy receiving end of the signal transmitter, the signal transmitter is connected to an EL display sheet and drives the EL display sheet to display, a signal output end of the OBD2 system is connected to a signal receiving end of the signal transmitter, a signal output end of the signal transmitter is connected to a display driving end of the EL display sheet, and the EL display sheet is disposed on a rear windshield of the automobile and is used for displaying a driving speed, a rotation speed, and a gear of the automobile on the rear windshield; the signal transmitter comprises an MCU main control board and an inverter, wherein the electric energy output end of the external direct-current power supply is connected with the electric energy receiving end of the MCU main control board and the electric energy receiving end of the inverter, the electric energy output end of the inverter is connected with the electric energy receiving end of the EL display piece, the signal receiving end of the MCU main control board is connected with the signal output end of the OBD2 system, and the driving signal output end of the MCU main control board is connected with the signal receiving end of the EL display piece; the MCU main control board comprises an OBD2 communication circuit, an STM32 bit singlechip, an optical coupling isolation circuit, a silicon controlled circuit and a DC-DC buck converter; the OBD2 communication circuit is connected with a signal output end of the OBD2 system through a USB connector, a signal receiving end of the STM 32-bit singlechip is connected with a signal output end of the OBD2 communication circuit, a signal receiving end of the optical coupling isolation circuit is connected with a signal output end of the STM 32-bit singlechip, a signal receiving end of the silicon controlled rectifier circuit is connected with a signal output end of the optical coupling isolation circuit, and a signal receiving end of the EL display piece is connected with a signal output end of the silicon controlled rectifier circuit; the electric energy receiving end of the STM32 bit single chip microcomputer is connected with the electric energy output end of the DC-DC buck converter, and the electric energy receiving end of the DC-DC buck converter is connected with the electric energy output end of the external direct current power supply; and the electric energy receiving end of the silicon controlled rectifier circuit is connected with the electric energy output end of the inverter, and the electric energy receiving end of the EL display piece is connected with the electric energy output end of the silicon controlled rectifier circuit.

The external direct-current power supply is connected to a cigarette lighter plug, an OBD2 interface of an OBD2 system is connected with a signal transmitter through a special automobile OBD link (a USB connecting wire) signal, the signal transmitter is electrically connected with the external direct-current power supply, the signal transmitter can be powered through the external direct-current power supply, the normal work of the signal transmitter is guaranteed, the signal transmitter is connected with an EL display piece through a flat cable, the signal transmitter transmits received signals to the EL display piece to display data, the EL display piece is arranged on a rear windshield of an automobile, so that information such as the speed, the rotating speed and the gear of the automobile can be observed by a rear automobile, the rear automobile can timely react and adjust according to the running information of the front automobile, and the probability of rear-end collision accidents is reduced.

The EL display piece is an EL cold light piece, and the use of the EL display piece has the following advantages: 1. the EL display piece can uniformly disperse light, does not produce glaring impact on vision, and is a harmless light source; 2. the light emitted by the EL display sheet is short-wave light, the light is strong in condensation and penetrability, and the display is bright and striking at night and in foggy days; 3. the EL display piece is energy-saving, environment-friendly and low in power consumption; 4. EL display piece simple to operate practices thrift installation cost.

Data signals in an OBD2 system are transmitted to an OBD2 communication circuit, then the signals are transmitted to an STM32 bit single chip microcomputer to be subjected to signal processing and signal transmission, the signals are transmitted to an optical coupling isolation circuit and further transmitted to a silicon controlled rectifier circuit, the optical coupling isolation circuit can prevent interference caused by connection with electricity, the silicon controlled rectifier circuit has the advantages of low power control and high power, switching on and off in microsecond level, non-contact operation, no spark, no noise, high efficiency and the like, then the silicon controlled rectifier circuit transmits the signals to an EL display piece, and then signals such as vehicle speed, rotating speed, gears and the like are displayed on the EL display piece.

The external direct-current power supply supplies power to the STM32 single chip microcomputer through the DC-DC buck converter, and the external direct-current power supply supplies power to the silicon controlled rectifier circuit and the EL display piece through the inverter.

The STM32 single chip microcomputer is specifically STM32F103VCT6 model; the OBD2 communication circuit adopts can bus protocol, specifically TJA1050 type; the EL display piece is composed of 7-segment LEDs, a circuit diagram of 2 1-segment LEDs is shown in FIG. 6, and the model of the 7-segment LEDs is DPY _ 7-SEG; the optical coupling isolation circuit is MOC3021, is shown as being connected between two sets of optical coupling isolation circuit and the silicon controlled rectifier circuit in fig. 5, the utility model discloses in carry out the optical coupling isolation circuit and the silicon controlled rectifier circuit of electricity connection by 54 groups of the same mode and constitute.

Furthermore, the external direct-current power supply adopts a DC12V power supply, the inverter adopts a DC12V inverter, and the DC-DC buck converter adopts a DC12V-DC5V buck converter. The DC12V inverter converts the DC power delivered by the DC12V power supply into AC power to supply power for the silicon controlled rectifier circuit and the EL display chip, and the DC12V-DC5V buck converter reduces the voltage of the power supply from 12V to 5V to supply power for the STM32 single-chip microcomputer.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a warning display system based on car OBD2, includes the OBD2 system and the external DC power supply who sets up in the car, its characterized in that: OBD2 system signal is connected with signal transmitter, external DC power supply's electric energy output end links to each other with signal transmitter's electric energy receiving terminal, signal transmitter is connected with EL display piece and drives the EL display piece and show, OBD2 system's signal output end with signal transmitter's signal receiving terminal links to each other, signal transmitter's signal output end links to each other with the demonstration drive end of EL display piece, the EL display piece sets up on the rear windshield of car for show the speed of travel, rotational speed and the gear of car on the rear windshield.

2. The automotive OBD 2-based warning display system of claim 1, wherein: the signal transmitter includes MCU main control board and dc-to-ac converter, the electric energy output of external DC power supply links to each other with the electric energy receiving terminal of MCU main control board and the electric energy receiving terminal of dc-to-ac converter, the electric energy output of dc-to-ac converter links to each other with the electric energy receiving terminal of EL display piece, the signal receiving terminal of MCU main control board with the signal output part of OBD2 system links to each other, the drive signal output part of MCU main control board with the signal receiving terminal of EL display piece links to each other.

3. The vehicle OBD 2-based warning display system of claim 2, wherein: the MCU main control board comprises an OBD2 communication circuit, an STM32 bit singlechip, an optical coupling isolation circuit, a silicon controlled circuit and a DC-DC buck converter;

4. The vehicle OBD 2-based warning display system of claim 3, wherein: the external direct current power supply is a DC12V power supply, the inverter is a DC12V inverter, and the DC-DC buck converter is a DC12V-DC5V buck converter.