CN203293826U - Wireless real-time vehicle condition monitoring system - Google Patents
Wireless real-time vehicle condition monitoring system Download PDFInfo
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- CN203293826U CN203293826U CN2013203473633U CN201320347363U CN203293826U CN 203293826 U CN203293826 U CN 203293826U CN 2013203473633 U CN2013203473633 U CN 2013203473633U CN 201320347363 U CN201320347363 U CN 201320347363U CN 203293826 U CN203293826 U CN 203293826U
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- 238000006243 chemical reaction Methods 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
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- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The utility model discloses a wireless real-time vehicle condition monitoring system which comprises a singlechip control circuit, a tire pressure monitoring circuit, a vehicle weight measuring circuit, a GSM (Global System For Mobile)/GPS (Global Position System) module and a power circuit, wherein the singlechip control circuit is externally connected with the tire pressure monitoring circuit, the vehicle weight measuring circuit and a GSM/GPS module circuit; the tire pressure monitoring circuit is formed by a tire pressure monitoring transmitting unit and a tire pressure monitoring receiving unit; the vehicle weight measuring circuit is formed by a pressure sensor, a voltage amplifier and an analog-digital converter; the tire pressure monitoring transmitting unit is positioned in a tire of a vehicle. The wireless real-time vehicle condition monitoring system overcomes the defects in the prior art and is used for efficiently and accurately acquiring vehicle condition information closely relevant to the safety running of the vehicle in real time.
Description
Technical field
The utility model relates to a kind of wireless real-time vehicle condition monitoring system, belongs to the watch-dog technical field.
Background technology
Along with the continuous expansion of China development and city size, automobile quantity increases day by day, and the pressure of transport administration is increasing, wherein to the Real-Time Monitoring of carrier vehicle vehicle condition, be construction safety, unimpeded, green traffic in the urgent need to.The real-time vehicle condition of carrier vehicle comprises the vehicle essential information, vehicle running state, and weight informations etc., wherein have the vehicle tyre situation, vehicle load situation, Vehicle Speed and running time with the closely-related information of safe driving.Quantity research shows greatly, and chaufeur is not understood vehicle condition information, and to overload of vehicle, it is the main reason that causes the carrier vehicle traffic accident that hypervelocity and fatigue driving lack effectively supervision.According to statistics, the annual economic loss that is caused by traffic accident is up to hundred million yuan of hundreds ofs, and therefore, how actv. carries out real-time monitoring to carrier vehicle, becomes the study hotspot of automotive traffic industry.
At present, existing single tire pressure monitoring system is applied on automobile, can help chaufeur to obtain tire state in the Vehicle Driving Cycle process, and safe driving is had certain help.But this single monitoring system but can not be obtained other security-related driving information of vehicle.Also there is single vehicle location system to be applied on carrier vehicle, can Real-time Obtaining vehicle location and moving velocity temporal information, monitoring vehicles in real time supervision is had certain help, but these systems can not be obtained other security-related driving information of vehicle equally.At present the load-carrying monitoring of carrier vehicle had two kinds of methods of Static and dynamic: traditional static weighing survey precision is higher, and efficiency is low, floor area large, move the shortcomings such as inconvenient but exist.Along with deepening continuously of traffic checking, the improvement of transfiniting, the automobile dynamically weighing system has obtained application more and more widely.Existing dynamic weighing system all is mounted in toll station at a high speed, and for those vehicles that run on non-express highway, be difficult to carry out the monitoring of car weight amount, how to realize that it is the key issue of the overrun management overload transportation that the weight of vehicle is weighed on Rapid Science ground always.
The utility model content
The purpose of this utility model is for avoiding the existing weak point of above-mentioned prior art, and a kind of wireless real-time vehicle condition monitoring system is provided, in order to obtain in real time, efficiently and accurately and the closely-related vehicle condition information of vehicle safe driving.
The technical solution adopted in the utility model is as follows:
Wireless real-time vehicle condition monitoring system, comprise single chip machine controlling circuit, tire pressure monitoring circuit, car weight metering circuit, GSM/GPS module and power circuit, the external tire pressure monitoring circuit that is formed by tire pressure monitoring transmitter unit and tire pressure monitoring receiving element of described single chip machine controlling circuit, the car weight metering circuit and the GSM/GPS modular circuit that are formed by pressure sensor, voltage amplifier and A and D converter structure; The tire pressure monitoring transmitter unit is placed in vehicle tyre.
Described single chip machine controlling circuit is the STM32F107 microcontroller chip.
Described tire pressure monitoring transmitter unit consists of sensor, radiofrequency launcher and antenna, and sensor is the SP300V2.1-E106-0 sensor, and radiofrequency launcher is the MAX7044 radio frequency chip.
Described tire pressure monitoring receiving element consists of antenna, low noise amplifier and superheterodyne receiver; Low noise amplifier is the MAX2460 chip, and superheterodyne receiver is the MAX1473 chip.
Described car weight metering circuit consists of pressure sensor, voltage amplifier and A and D converter; Pressure sensor is the LOAD CELLS of SM40 series, and voltage amplifier is the AD624 instrument amplifier, and A and D converter is the A/D TLC2543 chip of 12 bit serial.
Compared with the prior art, the utility model beneficial effect is embodied in:
The tire pressure monitoring circuit that single chip machine controlling circuit is external, can detect tire internal pressure and temperature under driving states in real time, realized the monitoring to vehicle driving states of chaufeur and control center; External car weight measuring system, realized the measurement to carload, and overload is avoided and prevented to actv., guaranteed the safe driving of automobile; External GSM/GPS module, realized vehicle location location and velocity information are obtained, and complete the transmission over radio of whole system data by the GSM function, essential information with vehicle, motoring condition information, loading condition information, position, velocity information is sent to control center in real time, realizes that control center carries out real-time monitoring and management to safety and the load-carrying of vehicle.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model;
Fig. 2 is the single chip machine controlling circuit schematic diagram;
Fig. 3 is tire pressure monitoring transmitter unit schematic circuit diagram;
Fig. 4 is tire pressure monitoring receiving element schematic circuit diagram;
Fig. 5 is car weight metering circuit schematic diagram;
Fig. 6 is the GSM/GPS schematic circuit diagram;
Fig. 7 is power circuit principle figure.
The specific embodiment
As shown in Figure 1, a kind of wireless real-time vehicle condition monitoring system, be comprised of the external tire pressure monitoring circuit of single chip machine controlling circuit, car weight metering circuit and GSM/GPS module and power circuit.
As shown in Figure 2, single chip machine controlling circuit adopts the STM32F107 microcontroller chip, the FLASH storage chip of this built-in chip type 256K byte, the RAM random access memory of 64K byte, reach 5 serial ports, wherein serial ports 3 (the USART3_TX(chip pin is 47) and USART3_RX (chip pin is 48)) be used for partly communicating by letter with GPS, serial ports 2 (USART2_TX (chip pin is 25), USART2_RX (chip pin is 26) and USART2_RTS (chip pin 24) etc.) is for GSM, partly communicating by letter.Nearly 80 IO, can be used for controlling the each several part circuit.The multiple-working modes (power consumption under the low-power consumption standby mode is no more than 40uA) such as STM32F107 provides at a slow speed, wait, low-power consumption wait, standby, shutdown, the very convenient management of carrying out power consumption.
As shown in Fig. 3,4, the tire pressure monitoring circuit is comprised of tire pressure monitoring transmitter unit and tire pressure monitoring receiving element two parts.The tire pressure monitoring transmitter unit is connected and composed successively by sensor, radiofrequency launcher and antenna, is placed in vehicle tyre.Sensor adopts the SP300V2.1-E106-0 sensor of company of Infineon, this sensor has been integrated pressure sensor, temperature sensor and acceleration pick-up and battery voltage monitoring device of silicon micromachining, and the RISC controller of an inner integrated low-power consumption 8 bit Harvard structures.Radiofrequency launcher adopts the MAX7044 radio frequency chip.SP300V2.1-E106-0 SP300V2.1-E106-0 after Real-time Obtaining vehicle tyre pressure, temperature and acceleration information, sends to data pin and the clock pin of radio frequency chip MAX7044 by the mode of serial communication.MAX7044 becomes these Data Modulations the radiofrequency signal of 433MHz, and by antenna, sends to receiving unit.MAX7044 adopts the OOK/ASK modulation system, and traffic rate can reach 100 kbps.
As shown in Figure 4, the tire pressure monitoring receiving element is connected and composed successively by antenna, low noise amplifier and superheterodyne receiver.Due to vehicle in the process of moving, radiofrequency signal easily is interfered and decays, therefore, the tire pressure monitoring receiving element must have enough small signals amplification abilities, simultaneously the interference of clutter reduction and noise.Low noise amplifier in this unit adopts the MAX2460 chip, and it is input to superheterodyne receiver with after from the faint radiofrequency signal of tire pressure monitoring transmitter unit, the amplifying of antenna reception.Superheterodyne receiver adopts the MAX1473 chip, MAX1473 with the radiofrequency signal demodulation after, deliver to the IO pin of single chip machine controlling circuit STM32F107 by its 25 human hair combing waste, STM32F107 shows in real time tire pressure and the temperature information that the tire pressure monitoring circuit obtains or by the GSM circuit, information is beamed back control center by the RT12864 Liquid Crystal Display of the external 128*64 of XSI.
As shown in Figure 5, the car weight metering circuit is connected and composed successively by pressure sensor, voltage amplifier and A and D converter.The pressure signal pick-up transducers adopts the LOAD CELLS of four SM40 series, SM40 LOAD CELLS inside consists of electric balance, the function of electric balance is that the resistance change of resistance strain gauge is converted to voltage signal output, and this output voltage signal is proportional to by measuring gravity.Four LOAD CELLS SM40 are evenly distributed on four strong points of car chassis, are responsible for the measurement of carload information.The voltage signal of exporting due to SM40 is the very little differential signal of millivolt level of amplitude, is difficult to directly carry out analogue to digital conversion, and therefore, voltage amplifier adopts high gain, high input resistance, hangs down the AD624 instrument amplifier of imbalance and high cmrr.A and D converter adopts the A/D TLC2543 chip of 12 bit serial.After the voltage signal of SM40 LOAD CELLS output is delivered to voltage amplifier AD624 and is amplified, digital signal after A and D converter TLC2543 analogue to digital conversion is delivered to single chip machine controlling circuit again, and single chip machine controlling circuit is delivered to this check weighing signal display circuit or by the GSM circuit, beams back control center.
Described STM32F107 microcontroller chip is connected with CS, DO, DI, CLK and the EOC of TLC2543 by IO, and STM32F107 simulates the serial sequential of TLC2543 by IO, controls A/D, realizes the analogue to digital conversion of the pressure signal of LOAD CELLS SM40 output.
As shown in Figure 6, the GSM/GPS circuit adopts the SIM548C module of SIMCOM company, this module is built-in GSM and GPS function.Micro controller system STM32F107 is respectively by serial ports 2(GSM) and serial ports 3(GPS)) carry out data transmit-receive with SIM548C.After the microwave signal demodulation that SIM548C receives gps antenna, send to 47,48 pin of micro controller system STM32F107 by the GPS serial ports, and by micro controller system, this positioning signal is delivered to display circuit or by the GSM circuit, beamed back control center.The GPS circuit adopts the power supply mode of not cutting off the power supply, and control center can 24 hours monitor vehicle positions.The GSM circuit is responsible for the real-time Communication for Power with control center, the various status informations when vehicle in front can be mail to control center automatically, perhaps according to the long-range GSM information of control center, interested car status information is issued control center.
The GSM/GPS circuit adopts the SIM548C module of SIMCOM company, this module is built-in GSM and GPS function.Described STM32F107 partly communicates by letter with GPS by serial ports 3, obtain vehicle current location and velocity information, described STM32F107 partly communicates by letter with GSM by serial ports 2, controls GSM global system for mobile communications part and sends all vehicle condition information of whole system to control center.
Power circuit as shown in Figure 6.The power supply that system is used comprises: 24V, and 12V, 5V, 4.2V and 3.3V, supplied with by power circuit.The whole system power supply is input as Vehicular accumulator cell 24V, considers electromagnetic environment comparatively abominable in automotive ignition and driving process, and for the safety and stability of support system, front end DC-DC power supply chip is selected LM22676 and LM2576.This two power supply chip all has wider input voltage range and less quiescent current, is fit to use in abominable electromagnetic environment, and can the low power dissipation design of assurance system under dormant state.4.2V and 3.3V is normal voltage supplied, when the system hibernates state, guarantees that micro controller system and GPS circuit can be waken up under dormant state, control center can obtain car status information at any time.
Claims (5)
1. wireless real-time vehicle condition monitoring system, comprise single chip machine controlling circuit, tire pressure monitoring circuit, car weight metering circuit, GSM/GPS module and power circuit, it is characterized in that: the external tire pressure monitoring circuit that is formed by tire pressure monitoring transmitter unit and tire pressure monitoring receiving element of described single chip machine controlling circuit, the car weight metering circuit and the GSM/GPS modular circuit that are formed by pressure sensor, voltage amplifier and A and D converter structure; The tire pressure monitoring transmitter unit is placed in vehicle tyre.
2. wireless real-time vehicle condition monitoring system according to claim 1, it is characterized in that: described single chip machine controlling circuit is the STM32F107 microcontroller chip.
3. wireless real-time vehicle condition monitoring system according to claim 1, it is characterized in that: described tire pressure monitoring transmitter unit consists of sensor, radiofrequency launcher and antenna, sensor is the SP300V2.1-E106-0 sensor, and radiofrequency launcher is the MAX7044 radio frequency chip.
4. wireless real-time vehicle condition monitoring system according to claim 1, it is characterized in that: described tire pressure monitoring receiving element consists of antenna, low noise amplifier and superheterodyne receiver; Low noise amplifier is the MAX2460 chip, and superheterodyne receiver is the MAX1473 chip.
5. wireless real-time vehicle condition monitoring system according to claim 1, it is characterized in that: described car weight metering circuit consists of pressure sensor, voltage amplifier and A and D converter; Pressure sensor is the LOAD CELLS of SM40 series, and voltage amplifier is the AD624 instrument amplifier, and A and D converter is the A/D TLC2543 chip of 12 bit serial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203473633U CN203293826U (en) | 2013-06-18 | 2013-06-18 | Wireless real-time vehicle condition monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203473633U CN203293826U (en) | 2013-06-18 | 2013-06-18 | Wireless real-time vehicle condition monitoring system |
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| CN203293826U true CN203293826U (en) | 2013-11-20 |
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| CN2013203473633U Expired - Fee Related CN203293826U (en) | 2013-06-18 | 2013-06-18 | Wireless real-time vehicle condition monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273812A (en) * | 2013-06-18 | 2013-09-04 | 安徽荣冠光电有限公司 | Wireless real-time vehicle condition monitoring system |
| CN105270106A (en) * | 2014-06-26 | 2016-01-27 | 卡特彼勒公司 | Tire Based Method and Device for Measuring Running Surface Strength |
-
2013
- 2013-06-18 CN CN2013203473633U patent/CN203293826U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273812A (en) * | 2013-06-18 | 2013-09-04 | 安徽荣冠光电有限公司 | Wireless real-time vehicle condition monitoring system |
| CN105270106A (en) * | 2014-06-26 | 2016-01-27 | 卡特彼勒公司 | Tire Based Method and Device for Measuring Running Surface Strength |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20160618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |