CN202548932U

CN202548932U - Vehicle-mounted smart traveling data recorder

Info

Publication number: CN202548932U
Application number: CN2012202027965U
Authority: CN
Inventors: 叶自清
Original assignee: Central South University of Forestry and Technology
Current assignee: Central South University of Forestry and Technology
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-11-21
Anticipated expiration: 2022-05-08

Abstract

The utility model discloses a vehicle-mounted smart traveling data recorder. The vehicle-mounted smart traveling data recorder is characterized in that the vehicle-mounted smart traveling data recorder comprises a vehicle power supply system, a voltage transformation circuit, a liquid crystal display module, an access module, a tri-axis inertial sensor, a microprocessor, a monitor reset circuit, a key setting module and a communication module, wherein the vehicle power supply system, the voltage transformation circuit and the liquid crystal display module are connected in sequence; the access module and the tri-axis inertial sensor are connected with the voltage transformation circuit; the voltage transformation circuit, the liquid crystal display module, the access module, the tri-axis inertial sensor, the monitor reset circuit, the key setting module and the communication module are all connected with the microprocessor; and the microprocessor is an LPC2114ARM controller, and includes two built-in ARM SPIs (serial peripheral interface) and one data processing module. The system provided by the utility model can objectively record the vehicle running state and the driving information of a driver in the whole journey, and can realize write protection of the acquired data, thereby monitoring the driver at any moment, effectively obviating the serious illegal traffic behaviors, such as speeding and fatigue driving, and preventing occurrence of road traffic accidents.

Description

A kind of intelligent vehicle-carried Tachographs

Technical field

The utility model relates to data acquisition system (DAS), particularly a kind of intelligent vehicle-carried Tachographs.

Background technology

In order to ensure the driving safety and the driving behavior of supervising the driver of traffic participation each side, country takes to check severely special campaigns such as drunk driving, hypervelocity, drops into huge manpower and materials; Though obtain certain effect; But still have the minority driver to have idea of leaving things to chance, can not change the driving habits of oneself, illegal activities emerge in an endless stream to make hypervelocity, drive when intoxicated etc.; Cause huge personnel, property loss and abominable social influence, hinder the harmony of society stable.China uses for reference the experience that developed country reduces accident rate, promulgation automobile travel recorder national standard, and put teeth in, make the driver initiatively give up bad driving habits.The IBB-3C/3D series automobiles Tachographs that the big boat in Beijing is produced adopts the one chip microcomputer circuit; Operation complete monitoring to motor vehicle operation and driver; Can the vehicle through running of record and the information of driver operation be sent to upper computer analyzing software.The automobile travel recorder of the GPST80 series that Guangzhou leading computing machine science and technology company limited produces has cell phone map and looks into car; Satnav; Real-time road; The driving trace playback; Preserve the GPRS blind area; Functions such as overspeed alarming.But Tachographs is not fine still having problems, effect aspect design, production and the supervision, so it is necessary to design the registering instrument of producing more practicality, is the prerequisite that guarantees effectively to supervise safety traffic.

Summary of the invention

The technical matters that the utility model will solve provides a kind of intelligent vehicle-carried Tachographs; Can be in real time, important state variables such as the vertical speed of a motor vehicle in the collection vehicle driving process, yaw velocity, side slip angle reliably, for the driving safety that improves automobile provides the data basis.

The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be: a kind of intelligent vehicle-carried Tachographs; It is characterized in that, comprise automobile power system, voltage conversion circuit, LCD MODULE, access module, three inertial sensors, microprocessor, monitoring and reset circuit, button setting module and communication modules; Described automobile power system, voltage conversion circuit, LCD MODULE are connected successively; Described access module, three inertial sensors are connected with described voltage conversion circuit; Described voltage conversion circuit, LCD MODULE, access module, three inertial sensors, monitoring and reset circuit, button setting module and communication modules all are connected with described microprocessor; Described microprocessor is the LPC2114ARM controller, comprises two built-in SPI of ARM and a data processing module.

The beneficial effect of the utility model: native system can omnidistance objective record travel condition of vehicle and pilot control information; Data to gathering are carried out write-protect; Can play the effect of supervising the driver constantly; Effectively check serious traffic offence behaviors such as driver's hypervelocity and fatigue driving, the generation of prevention road traffic accident.On the basis of automotive electronics instrument system, increase simultaneously record, communication module, make system have the characteristics of aspects such as demonstrations, record and reinforcement communication be anti-interference, strengthened the stability of system based on the CAN bus.

Description of drawings

Fig. 1 is the utility model general structure synoptic diagram.

Embodiment

Embodiment 1: as shown in Figure 1; A kind of intelligent vehicle-carried Tachographs; It is characterized in that, comprise automobile power system, voltage conversion circuit, LCD MODULE, access module, three inertial sensors, microprocessor, monitoring and reset circuit, button setting module and communication modules; Described automobile power system, voltage conversion circuit, LCD MODULE are connected successively; Described access module, three inertial sensors are connected with described voltage conversion circuit; Described voltage conversion circuit, LCD MODULE, access module, three inertial sensors, monitoring and reset circuit, button setting module and communication modules all are connected with described microprocessor; Described microprocessor is a LPC2114 ARM controller, comprises two built-in SPI of ARM and a data processing module.

Automobile power system adopts the 12V accumulator, for each device in the system provides working power.The tachograph system each several part has different requirement to power supply: LPC2114 ARM microcontroller adopts two groups of power supplys, is respectively 3.3V power supply and 1.8V power supply.For the power supply of I/O confession electricity must be 3.3V, give that the power supply of peripheral hardware and kernel power supply must be 1.8V in the sheet, Inertial Measurement Unit, SD card are stored subsystem and liquid crystal display subsystem to need power supply are 5V in addition.So the voltage to accumulator output must adopt voltage conversion circuit to handle, and 12V voltage is transformed into stable 5V, 3.3V and 1.8V respectively supplies the tachograph system each several part to use, voltage conversion circuit also has overheated, overcurrent protection function simultaneously.Vehicle operational mode is complicated; The power supply normal power supply is the prerequisite that the assurance system is continuous, record data truly; If system power down registering instrument can the lost part data, and system is often because of the accident power down, so research power down data play an important role to analysis, the investigation of accident.Be anti-locking system sudden power, adopted the method for reserve battery.

The integrated degree of system's preservation real time data is significant to analyzing culprit; Therefore in real time the number write store should be lacked good more, data storage capacity interval time more and is the bigger the better; But too short sampling point was too concentrated and was caused data volume huge easily interval time; Under the certain situation of memory capacity, must influence the storage time of real-time certificate.The native system memory module adopts the FM18L08 ferroelectric memory, is the cycle to gather a secondary data with 0.2 second, and continuous 20 seconds is one group, preserves 10 groups of real time datas, and its sampling is back as history data store.Have higher reliability and have the characteristics of power down protection.Utilize ferroelectric effect storage data simultaneously, memory contents can not receive external environment to be influenced data and can deposit more than 10 years.

Three inertial sensor modules are in order to gather the running car parameter, and this system adopts three inertial sensors of ADIS16355, and sensor is connected with microprocessor through the SIP interface, and three acceleration and angular velocity are passed in the microprocessor.It is a collection storage display system of core that the SPI interface is combined into each subsystem with the ARM microprocessor.Data obtain the real-time speed of automobile, 3-axis acceleration and sideslip angle of vehicle through after the microprocessor processes.Above data are passed to memory module or through communication module data are passed to further handle on the PC and analyze.

Key-press module is accomplished human-computer interaction function; Use four push-button design modes in this system; Turn over promptly, turn over, cancel down and definite key, automobile travel recorder is provided with the different operation authority, make the registering instrument different user accomplish content of operation separately respectively through specific program.

LCD MODULE is the window of running information being informed the driver, and the important driving data of system record and detect dangerous situation or provide warning message to show during driver's illegal operation are in time reminded the driver, avoid having an accident.The basic parameters that go such as the native system LCD MODULE not only can display speed, mileage, light, oil mass, oil pressure; And information writing functions such as driver information, hypervelocity, fatigue driving can be provided; When the driving parameter surpasses the default scope, the content of automatic warning of system's meeting and display alarm.

For guaranteeing the timely correction when wrong to occur at system in case of system halt or internal processes, reset circuit is to guarantee the effectively indispensable part of operation of system stability.Reset circuit adopts microcontroller power monitoring chip MAX708SD in the native system, can improve the reliability of system.

In view of stronger interference environment in the running car; Communication module adopts CAN bus communication module in the native system; Have anti-strongly disturbing ability, the CAN controller uses the JA1000 of PHILIPS company, selects the physical bus interface of CAN transceiver PCA82C250 as SJA1000.

Claims

1. an intelligent vehicle-carried Tachographs is characterized in that, comprises automobile power system, voltage conversion circuit, LCD MODULE, access module, three inertial sensors, microprocessor, monitoring and reset circuit, button setting module and communication modules; Described automobile power system, voltage conversion circuit, LCD MODULE are connected successively; Described access module, three inertial sensors are connected with described voltage conversion circuit; Described voltage conversion circuit, LCD MODULE, access module, three inertial sensors, monitoring and reset circuit, button setting module and communication modules all are connected with described microprocessor.

2. system according to claim 1 is characterized in that, described microprocessor adopts the LPC2114ARM controller.