CN1473725A - Vehicle running recorder - Google Patents
Vehicle running recorder Download PDFInfo
- Publication number
- CN1473725A CN1473725A CNA031276458A CN03127645A CN1473725A CN 1473725 A CN1473725 A CN 1473725A CN A031276458 A CNA031276458 A CN A031276458A CN 03127645 A CN03127645 A CN 03127645A CN 1473725 A CN1473725 A CN 1473725A
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- mcu
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- data
- usb
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Abstract
The vehicle running recorder consists of micro control unit MCU, USB interface, great capacity memory, satellite receiving positioning module, etc. MCU serial port is connected to RS232 interface circuit, GPS antenna to the RF output of the GPS module to receive the positioning and state information and send to serial port TX, the receiving serial port RX to RS232 interface circuit, and MCU processes the received signal before transmitting via USB data bus to upstream computer through USB interface to complete the transmission of real-time position and state information. The GPS technology makes the determination and record of running locus accurate and USB data transmission raises the data transmission and read-out rate to reduce peripheral chip and minimize the product.
Description
Technical field:
The present invention discloses a kind of vehicle running recording instrument, relates to the recording device of registration of vehicle motoring condition, belongs to the vehicle operation data technical field of memory.
Background technology:
Existing drive recorder exists following problem: 1, memory device adopts EEPROM, and memory capacity is little, and the record cycle is short.2, adopt the RS232 serial port to carry out data transmission, the transmission time was longer when volume of transmitted data was big.3, no-voltage protection part, vehicle virtual voltage situation complexity, voltage fluctuation is bigger, and the high-voltage phenomenon of continuing is arranged, and the situation that power unit burns is a lot.4, the virtual voltage difference of different vehicle is used the terminal of different model to the vehicle of different voltages.5, the Vehicular status signal of Jie Ruing is few, by increasing sensor, inserts vehicle state information, the more current running state of registration of vehicle.6, the initialization of GPS locating data needs certain hour, can not the immediate record data.
Summary of the invention:
The invention provides a kind of vehicle ' drive recorder, overcome the problem of existing drive recorder record cycle weak point, data transmission period length, different vehicle commonality difference.
Technical solution of the present invention is as follows: by microcontroller MCU, the serial communication USB interface, bulk memory Flash, level switch module, the GPS module and the signal indicating section that receive satellite location data constitute drive recorder, wherein, the crystal oscillating circuit input of microcontroller MCU, mouth XTAL1, XTAL2 is connected with crystal oscillating circuit by electric capacity, reset circuit connects the reset terminal of MCU, the serial ports TX0 of MCU, RX0 is connected with the corresponding port of RS232 interface circuit, gps antenna RF is connected with GPS module radiofrequency signal, with the location that receives, status information is by the signal sending serial port and signal TX of GPS module, receiving serial ports RX is connected with the corresponding port of RS232 interface circuit, after the signal conditioning of MCU with reception, adopt the usb data bus to carry out data transmission, be connected the position when finishing vehicle ' with the upper computer interface by usb circuit, the transmission of status information, power circuit is MCU by VCC, the GPS module, the RS232 interface circuit, power-switching circuit provides power supply.The P1 mouth of MCU is made data port and is connected with the data port of memory device by level shifting circuit, and the P0 mouth of MCU mouthful connects the control mouth of memory device by level shifting circuit as control, finishes the large-capacity data access facility.
Use automobile cigarette lighter to insert the 12V automobile power source, provide stable 5V direct supply through overvoltage crowbar for central processing unit, through the voltage transitions part 5V direct current (DC) being converted to 3.3V again is GPS module and bulk memory power supply.The USB serial communication interface connects terminal and PC provides high-speed data transmission.
Good effect of the present invention is: adopt the usb data bus to carry out data transmission, increased substantially the efficient of data transmission.The driving information of vehicle can be passed to upper computer apace; The high-capacity memory data memory cycle extends, and can reach the driving information of several months, and actv. has increased the memory cycle of data, owing to adopted the technology of parallel transmission, has improved the reading speed of data; The collection satellite positioning tech is determined the driving trace with registration of vehicle more accurately.Reduced the use of peripheral chip, for the product miniaturization provides condition.
Description of drawings:
Fig. 1 is schematic circuit diagram of the present invention.
The specific embodiment:
According to shown in Figure 1, MCU selects the W77E58 microcontroller for use, wherein, the crystal oscillator input of microcontroller MCU, mouth XTAL1, XTAL2 is connected with the 11.0592MHz crystal oscillating circuit by electric capacity, reset circuit meets the reset terminal RESET of MCU, the serial ports TX0 of MCU, RX0 is connected with the corresponding port of RS232 interface circuit, the radio-frequency (RF) output end of gps antenna RF connects GPS module radio-frequency (RF) signal input end, with the location that receives, after status information is carried out calculation process by the GPS module, with the signal after handling through sending serial ports TX, receive serial ports RX and send microcontroller MCU to through the RS232 interface circuit, MCU with the signal conditioning that receives after by serial ports TX1, RX1 is connected with the upper computer interface through usb circuit and carries out communication, finish the location, the transmission of status information, power circuit is MCU by VCC, the GPS module, the RS232 interface circuit provides power supply.
Bulk memory is selected the K9F2808UOB chip for use, and its data port D0 ~ D7 line, a control mouthful C1 ~ C5 line are connected with P1, the P0 port of MCU respectively with by level shifting circuit, finish the large-capacity data access facility.
After the energized, power light reddens the indicating equipment connection normally, and external power supply is the DC regulated power supply of 5V, and wave circuit is the microcontroller power supply after filtration.The GPS module adopts the 3.3V power supply, insert by voltage conversion circuit, the GPS indicator lamp module output locating data that reddens, through initialization procedure after a while, the gps signal indicator lamp turns green, GPS module output precise location information, and microcontroller extracts conversion to locating information and forms transformat, pass to computing machine through RS232, accurate locating data is provided.
Claims (1)
1, a kind of vehicle running recording instrument, it is characterized in that: by microcontroller MCU, the serial communication USB interface, CPU, bulk memory Flash, level switch module, the GPS module and the signal indicating section that receive satellite location data constitute, wherein, the crystal oscillating circuit input of microcontroller MCU, mouth XTAL1, XTAL2 is connected with crystal oscillating circuit by electric capacity, reset circuit connects the reset terminal of MCU, the serial ports TX0 of MCU, RX0 is connected with the corresponding port of RS232 interface circuit, gps antenna RF is connected with GPS module radiofrequency signal, with the location that receives, status information is by the signal sending serial port and signal TX of GPS module, receive the corresponding port of serial ports RX and RS232 interface circuit, after the signal conditioning of MCU with reception, adopt the usb data bus to carry out data transmission, be connected the position when finishing vehicle ' with the upper computer interface by usb circuit, the transmission of status information, power circuit is MCU by VCC, the GPS module, the RS232 interface circuit, power-switching circuit provides power supply.The P1 mouth of MCU is made data port and is connected with the data port of memory device by level shifting circuit, and the P0 mouth of MCU mouthful connects the control mouth of memory device by level shifting circuit as control, finishes the large-capacity data access facility.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031276458A CN1473725A (en) | 2003-07-23 | 2003-07-23 | Vehicle running recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031276458A CN1473725A (en) | 2003-07-23 | 2003-07-23 | Vehicle running recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1473725A true CN1473725A (en) | 2004-02-11 |
Family
ID=34153211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031276458A Pending CN1473725A (en) | 2003-07-23 | 2003-07-23 | Vehicle running recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1473725A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002151B (en) * | 2004-06-09 | 2010-12-08 | 通用汽车公司 | Real-time vehicle dynamics estimation system |
| CN104290682A (en) * | 2014-07-01 | 2015-01-21 | 国家电网公司 | Integrated mounting method of automobile e-dog, automobile data recorder and navigator |
| CN106908824A (en) * | 2017-04-18 | 2017-06-30 | 冯本勇 | A kind of precise positioning system for being applied to railway |
| CN108108564A (en) * | 2017-12-29 | 2018-06-01 | 安徽皖通邮电股份有限公司 | The apparatus and method that a kind of raising system starts speed |
-
2003
- 2003-07-23 CN CNA031276458A patent/CN1473725A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002151B (en) * | 2004-06-09 | 2010-12-08 | 通用汽车公司 | Real-time vehicle dynamics estimation system |
| CN104290682A (en) * | 2014-07-01 | 2015-01-21 | 国家电网公司 | Integrated mounting method of automobile e-dog, automobile data recorder and navigator |
| CN104290682B (en) * | 2014-07-01 | 2017-01-04 | 国家电网公司 | Automotive electronics Canis familiaris L., drive recorder, navigator integrative installation technology method |
| CN106908824A (en) * | 2017-04-18 | 2017-06-30 | 冯本勇 | A kind of precise positioning system for being applied to railway |
| CN106908824B (en) * | 2017-04-18 | 2023-07-14 | 冯本勇 | Be applied to railway accurate positioning system |
| CN108108564A (en) * | 2017-12-29 | 2018-06-01 | 安徽皖通邮电股份有限公司 | The apparatus and method that a kind of raising system starts speed |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |