CN101865715B - Method for oil mass signal synchronous compensation of on-vehicle positioning terminal - Google Patents
Method for oil mass signal synchronous compensation of on-vehicle positioning terminal Download PDFInfo
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- CN101865715B CN101865715B CN2010102019540A CN201010201954A CN101865715B CN 101865715 B CN101865715 B CN 101865715B CN 2010102019540 A CN2010102019540 A CN 2010102019540A CN 201010201954 A CN201010201954 A CN 201010201954A CN 101865715 B CN101865715 B CN 101865715B
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Abstract
The invention discloses a method for oil mass signal synchronous compensation of an on-vehicle positioning terminal. The on-vehicle positioning terminal employing the method comprises a central processing unit, a GPS positioning unit, a communication unit, a display unit, a keyboard and an oil mass information acquisition system, wherein the GPS positioning unit, the communication unit and the display unit are connected with the central processing unit respectively; and the keyboard and the oil mass information acquisition system are also connected with the central processing unit respectively. In the method, by synchronously acquiring power supply signals and oil mass signals, and performing operation processing on the signals by the central processing unit through an analog-digital converter, the abrupt changes of the oil mass in an oil tank are eliminated, a real oil mass value is input to a local display unit or is sent to a remote control center by the communication unit so as to realize the real-time accurate monitoring of the oil mass of the oil tank of a vehicle.
Description
Technical field
The present invention relates to a kind of on-vehicle positioning terminal, especially relate to a kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal.
Background technology
The monitoring technology of vehicle oil mass is mainly inserted fuel tank with high-precision sensor to existing on-vehicle positioning terminal product and the two kinds of methods of aanalogvoltage through collection vehicle oil mass signal line obtain current vehicle fuel tank fuel quantity storage.High-precision sensor inserts the method for fuel tank, and sampling precision is higher, system stability safety, but installation process is complicated, must transform oil tank of vehicle, and system realizes that cost is high.The method of the aanalogvoltage through collection vehicle oil mass signal line, advantage is that cost is low, is prone to realize and safeguard, but in brake or start moment vehicle fuel tank fuel quantity value and tend to undergo mutation, causes the signal accuracy of collection not high, can not truly reflect the oil mass value.Like application number is that 200810035356.3 patent just discloses a kind of fuel tank oil material anti-theft monitoring system; It comprises CPU, the vehicle-state monitoring means that is connected with CPU respectively, oil measurement unit; Display unit; Clock, mode conversion switch, keyboard and place the oil mass monitoring system in the CPU.Fuel tank oil material anti-theft monitoring system with this structure, acquisition precision are not high, and can only realize that static state down to the collection of vehicle fuel tank fuel quantity information, can not realize the oil mass information acquisition under the dynamic condition in the vehicle ' process.
Summary of the invention
The object of the invention overcomes deficiency of the prior art exactly, provides a kind of and can realize the real-time collection of oil mass signal and the oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of synchroballistic.
For solving the problems of the prior art; A kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of the present invention; GPS positioning unit, communication unit, display unit that its on-vehicle positioning terminal that is used for comprises CPU, is connected with CPU respectively also comprise the keyboard and the oil mass information acquisition system that are connected with CPU respectively.The oil mass information acquisition system comprises oil mass signal unit, power supply signal unit, voltage gear change-over switch, impedance protection circuit, analog to digital converter; Described oil mass signal unit, voltage gear change-over switch, impedance protection circuit, analog to digital converter are linked in sequence, and described power supply signal unit, voltage gear change-over switch, impedance protection circuit, analog to digital converter are linked in sequence.
The oil mass signal of described oil mass signal unit derives from vehicle oil float subsignal extension line.
The power supply signal of described power supply signal unit derives from the power lead to the power supply of vehicle oil float.
Described communication unit is connected with remote control center.
A kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of the present invention:
1) maximum output voltage of measurement oil mass signal is regulated vehicle oil float the full oil level of vehicle self oil mass gauge pointer indication is put, and measures the current magnitude of voltage V1 of this signal, and regulation voltage gear switch switch makes it to be fit to the gear of V1 magnitude of voltage;
2) operation keyboard is chosen the sub-supply voltage Vp of vehicle oil float that gathers under the stationary state, and Vp is converted into the digital signal of CPU identification and is sent to CPU by analog to digital converter through the impedance protection circuit;
3) the oil mass information acquisition system is gathered t power supply signal voltage Vpt and oil mass signal output voltage V ot constantly;
4) power supply signal voltage Vpt and oil mass signal output voltage V ot are converted into the digital signal of CPU identification and are sent to CPU by analog to digital converter through the impedance protection circuit;
5) the following modified computing formulae of CPU basis:
Vox=Vot×（Vp\Vpt）
Carry out synchroballistic correction computing, obtain the revised numerical value Vox of Vot;
6) CPU is scaled the current oil value with Vox and sends to display unit demonstration in real time or send to remote control center through communication unit.
In the said method; The maximum output voltage of measuring oil mass signal in the said step 1) is further comprising the steps of: regulate vehicle oil float and make the oil mass gauge pointer show zero position; Recording voltage value V2; Relatively V1 and V2 are big or small, and regulation voltage gear switch switch makes it to be fit to the big gear of magnitude of voltage among V1 and the V2.
A kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of the present invention; Be used for the on-vehicle positioning terminal of said structure and adopt above-mentioned steps; Under the condition of not extra increase system cost, real-time synchronous acquisition power supply signal and oil mass signal, signal carries out calculation process through analog to digital converter by CPU; Thereby eliminate the sudden change of fuel tank fuel quantity, true oil mass value is input to local display unit or sends to remote control center through communication unit.Thereby realize accurately monitoring in real time to vehicle fuel tank fuel quantity.
In sum, the present invention is a kind of to be used for that the oil mass signal synchronous compensation method acquisition precision of on-vehicle positioning terminal is high, cost is low, can realize oil mass signal collection continuous in stationary vehicle and the operational process and accurately reflect the oil mass value.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
The structural principle block diagram of the on-vehicle positioning terminal that Fig. 1 is used for for a kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of the present invention.
Fig. 2 is the structural principle block diagram of oil mass information acquisition system one embodiment among Fig. 1.
Embodiment
As shown in Figure 1; A kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of the present invention; Its on-vehicle positioning terminal that is used for comprises CPU 1, the GPS positioning unit 2 that is connected with CPU 1 respectively, communication unit 3, display unit 4, also comprises the keyboard 5 and oil mass information acquisition system 6 that are connected with CPU respectively.Communication unit 3 is connected with remote control center 7.
As shown in Figure 2; Oil mass information acquisition system 6 comprises oil mass signal unit 61, power supply signal unit 62, voltage gear change-over switch 63, impedance protection circuit 64, analog to digital converter 65; Wherein oil mass signal unit 61, voltage gear change-over switch 63, impedance protection circuit 64, analog to digital converter 65 are linked in sequence, and wherein power supply signal unit 62, voltage gear change-over switch 63, impedance protection circuit 64, analog to digital converter 65 are linked in sequence.
In the present embodiment, the oil mass signal of oil mass signal unit 61 derives from vehicle oil float subsignal extension line.
In the present embodiment, the power supply signal of power supply signal unit 62 derives from the power lead to the power supply of vehicle oil float.
In the present embodiment; CPU 1 is responsible for the digital signal that analog to digital converter 65 transforms is calculated as corresponding oil mass value; And the oil mass value is input to display unit 4 or sends to remote control center 7 through communication unit 3, be responsible for receiving and handling the information of other unit simultaneously.
In the present embodiment, GPS positioning unit 2 be used for the gps signal of accepting is handled, and the signal after will handling is transferred to CPU 1.
In the present embodiment, communication unit 3, the login cordless communication network is sent to remote control center 7 with the data that CPU 1 is handled.
In the present embodiment, display unit 4, Man Machine Interface shows Current GPS position, time, current oil mass, parameter etc.
In the present embodiment, keyboard 5: Man Machine Interface, carry out the fuel quantity parameter configuration.
In the present embodiment; Voltage gear change-over switch 63 belongs to the input protection device; Because oil mass signal output aanalogvoltage is in the 1-24V scope, then the input end scope of level impedance protection is 3.3V to the maximum, therefore must be depressed into the 0-3.3V scope above the aanalogvoltage branch of 3.3V.In the present embodiment, voltage gear change-over switch 63 is divided into 4 gears, and gear 1, gear 2, gear 3, gear 4 represent that respectively maximum input signal voltage is 3.3V, 5V, 12V, 24V.
In the present embodiment, impedance protection circuit 64 is mainly emitter follower, and input impedance is high, prevents that the Low ESR input from reducing the fuel-quantity transducer signal, and then influences the accuracy of vehicle oil mass pointer.
In the present embodiment, analog to digital converter 65 is 8 256 class resolution ratio analog to digital converters, converts aanalogvoltage into digital signal, supplies CPU 1 to handle.
The modified computing formulae that 1 pair of oil mass signal of CPU carries out synchroballistic is: Vox=Vot * (Vpt).Vox is revised oil mass signal output voltage, promptly is scaled the corresponding voltage of current oil value; Vot is a t oil mass signal output voltage constantly; Vp is the sub-supply voltage of vehicle oil float under the stationary state, i.e. power supply signal voltage; Vpt is a t power supply signal voltage constantly.
A kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal of the present invention is:
1) maximum output voltage of measurement oil mass signal; Regulating vehicle oil float puts the full oil level of vehicle self oil mass gauge pointer indication; Measure this signal current magnitude of voltage V1 with voltage table this moment, regulates vehicle oil float then and make the oil mass gauge pointer show zero position, recording voltage value V2; Relatively V1 and V2 are big or small, and regulation voltage gear switch switch 63 makes it to be fit to the big gear of magnitude of voltage among V1 and the V2;
2) operation keyboard 5, choose the sub-supply voltage Vp of vehicle oil float that gathers under the stationary state, and Vp is converted into the digital signal of CPU 1 identification and is sent to CPU 1 by analog to digital converter 65 through impedance protection circuit 64;
3) oil mass information acquisition system 6 is gathered t power supply signal voltage Vpt and oil mass signal output voltage V ot constantly;
4) power supply signal voltage Vpt and oil mass signal output voltage V ot are converted into the digital signal of CPU 1 identification and are sent to CPU 1 by analog to digital converter 65 through impedance protection circuit 64;
5) CPU 1 is carried out synchroballistic correction computing according to modified computing formulae, obtains the revised numerical value Vox of Vot;
6) CPU 1 is scaled the current oil value with Vox and sends to display unit 4 demonstration in real time or send to remote control center 7 through communication unit 3.
In a word, what embodiments of the invention were announced is its preferred implementation, but is not limited to this.Those of ordinary skill in the art understands spirit of the present invention very easily according to the foregoing description, and makes different amplifications and variation, but only otherwise break away from spirit of the present invention, all within protection scope of the present invention.
Claims (2)
1. oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal; Said on-vehicle positioning terminal comprises CPU (1), the GPS positioning unit (2) that is connected with CPU (1) respectively, communication unit (3), display unit (4); Also comprise the keyboard (5) and the oil mass information acquisition system (6) that are connected with CPU respectively; Communication unit (3) is connected with remote control center (7); The oil mass information acquisition system comprises oil mass signal unit, power supply signal unit, voltage gear change-over switch, impedance protection circuit, analog to digital converter; Wherein oil mass signal unit, voltage gear change-over switch, impedance protection circuit, analog to digital converter are linked in sequence, and wherein power supply signal unit, voltage gear change-over switch, impedance protection circuit, analog to digital converter are linked in sequence; The oil mass signal of oil mass signal unit (61) derives from vehicle oil float subsignal extension line; The power supply signal of power supply signal unit (62) derives from the power lead to the power supply of vehicle oil float; It is characterized in that, said method comprising the steps of:
1) maximum output voltage of measurement oil mass signal is regulated vehicle oil float the full oil level of vehicle self oil mass gauge pointer indication is put, and measures the current magnitude of voltage V1 of this signal, and regulation voltage gear switch switch makes it to be fit to the gear of V1 magnitude of voltage;
2) operation keyboard is chosen the sub-supply voltage Vp of vehicle oil float that gathers under the stationary state, and Vp is converted into the digital signal of CPU identification and is sent to CPU by analog to digital converter through the impedance protection circuit;
3) the oil mass information acquisition system is gathered t power supply signal voltage Vpt and oil mass signal output voltage V ot constantly;
4) power supply signal voltage Vpt and oil mass signal output voltage V ot are converted into the digital signal of CPU identification and are sent to CPU by analog to digital converter through the impedance protection circuit;
5) the following modified computing formulae of CPU basis:
Vox＝Vot×(Vp\Vpt)
Carry out synchroballistic correction computing, obtain the revised numerical value Vox of Vot;
6) CPU is scaled the current oil value with Vox and sends to display unit demonstration in real time or send to remote control center through communication unit.
2. a kind of oil mass signal synchronous compensation method that is used for on-vehicle positioning terminal according to claim 1; It is characterized in that; The maximum output voltage of measuring oil mass signal in the said step 1) is further comprising the steps of: regulate vehicle oil float and make the oil mass gauge pointer show zero position; Recording voltage value V2, relatively V1 and V2 are big or small, and regulation voltage gear switch switch makes it to be fit to the big gear of magnitude of voltage among V1 and the V2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102019540A CN101865715B (en) | 2010-06-17 | 2010-06-17 | Method for oil mass signal synchronous compensation of on-vehicle positioning terminal |
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| CN2010102019540A CN101865715B (en) | 2010-06-17 | 2010-06-17 | Method for oil mass signal synchronous compensation of on-vehicle positioning terminal |
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| CN101865715A CN101865715A (en) | 2010-10-20 |
| CN101865715B true CN101865715B (en) | 2012-02-01 |
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| JPS6162822A (en) * | 1985-05-16 | 1986-03-31 | Nissan Motor Co Ltd | Apparatus for measuring residual amount of fuel for car |
| US6927965B2 (en) * | 2003-03-25 | 2005-08-09 | The Boeing Company | Fuel level sensor safety barrier |
| FR2907212B1 (en) * | 2006-10-16 | 2008-12-05 | Peugeot Citroen Automobiles Sa | DEVICE AND METHOD FOR CORRECTING THE LEVEL MEASUREMENT OF A LIQUID CONTAINED IN A CONTAINER OF A VEHICLE ACCORDING TO ITS INCLINATION |
| CN201170741Y (en) * | 2008-02-25 | 2008-12-24 | 福建星网锐捷通讯股份有限公司 | Oil mass sensing system architecture |
| CN101246028A (en) * | 2008-03-28 | 2008-08-20 | 周振峰 | Fuel tank oil material anti-theft monitoring system |
| CN201311669Y (en) * | 2008-11-26 | 2009-09-16 | 厦门博安世通信息科技有限公司 | Oil consumption real-time monitoring instrument |
| CN201402165Y (en) * | 2009-04-21 | 2010-02-10 | 许庆军 | Fuel consumption GPS satellite transmission system for train locomotive and air conditioning generator car |
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