CN201726427U - Vehicle-mounted positioning terminal - Google Patents
Vehicle-mounted positioning terminal Download PDFInfo
- Publication number
- CN201726427U CN201726427U CN2010202275608U CN201020227560U CN201726427U CN 201726427 U CN201726427 U CN 201726427U CN 2010202275608 U CN2010202275608 U CN 2010202275608U CN 201020227560 U CN201020227560 U CN 201020227560U CN 201726427 U CN201726427 U CN 201726427U
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- vehicle
- oil mass
- unit
- power supply
- positioning terminal
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Abstract
The utility model discloses a vehicle-mounted positioning terminal comprising a central processing unit, a GPS positioning unit, a communication unit and a display unit which are respectively connected with the central processing unit, and a keyboard and an oil volume information acquisition system which are respectively connected with the central processing unit. The vehicle-mounted positioning terminal in the structure has high acquisition precision and low cost, and can realize the real-time accurate monitoring to the oil volume of a vehicle oil tank.
Description
Technical field
The utility model relates to a kind of on-vehicle positioning terminal, especially relates to a kind of oil mass information acquisition system of 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 aanalogvoltage dual mode by collection vehicle oil mass signal line obtains current vehicle fuel tank fuel quantity storage.High-precision sensor inserts the mode of fuel tank, and sampling precision is higher, and system stability safety, but installation process complexity must be transformed oil tank of vehicle, and system realizes the cost height.The mode of the aanalogvoltage by collection vehicle oil mass signal line, advantage is that cost is low, easily realizes and safeguards, but in brake or start moment vehicle fuel tank fuel quantity value and tend to undergo mutation, cause the signal accuracy of collection not high, can not truly reflect the oil mass value.As application number is that 200810035356.3 patent 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, the oil measurement unit, display unit, clock, mode conversion switch, keyboard and place 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 gathering under the dynamic condition in the vehicle ' process.
Summary of the invention
The purpose of this utility model overcomes deficiency of the prior art exactly, provides a kind of and can realize the real-time collection of oil mass signal and the on-vehicle positioning terminal of synchroballistic.
For solving the problems of the prior art, the utility model has adopted following technical scheme: GPS positioning unit, communication unit, display unit that it 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 diverter switch, impedance protection circuit, analog to digital converter; described oil mass signal unit, voltage gear diverter switch, impedance protection circuit, analog to digital converter are linked in sequence, and described power supply signal unit, voltage gear diverter switch, impedance protection circuit, analog to digital converter are linked in sequence.
As further improvement of the utility model, the oil mass signal of oil mass signal unit derives from vehicle oil float subsignal lead-out wire.
As further improvement of the utility model, the power supply signal of power supply signal unit derives from the power line to the power supply of vehicle oil float.
As further improvement of the utility model, communication unit is connected with remote control center.
The utility model on-vehicle positioning terminal adopts above-mentioned structure, additionally do not increasing under the condition of 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 by communication unit.Thereby realize accurately monitoring in real time to vehicle fuel tank fuel quantity.
In sum, the acquisition precision height of the utility model on-vehicle positioning terminal, cost are low, can realize oil mass signal collection continuous in stationary vehicle and the running and accurate reflection oil mass value.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing.
Fig. 1 is the structural principle block diagram of the utility model on-vehicle positioning terminal.
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, the utility model 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 comprises 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.
As shown in Figure 2; oil mass information acquisition system 6 comprises oil mass signal unit 61, power supply signal unit 62, voltage gear diverter switch 63, impedance protection circuit 64, analog to digital converter 65; wherein oil mass signal unit 61, voltage gear diverter switch 63, impedance protection circuit 64, analog to digital converter 65 are linked in sequence, and wherein power supply signal unit 62, voltage gear diverter 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 lead-out wire.
In the present embodiment, the power supply signal of power supply signal unit 62 derives from the power line 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 by 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 diverter switch 63 belongs to the input protection device; because oil mass signal output aanalogvoltage is in the 1-24V scope, then the input 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 diverter 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 the input impedance height prevents that the Low ESR input from reducing the fuel-quantity transducer signal, and then influences vehicle oil mass pointer accuracy.
In the present embodiment, analog to digital converter 65 is 8 256 class resolution ratio analog to digital converters, and aanalogvoltage is converted to digital signal, handles for CPU 1.
The modified computing formulae that 1 pair of oil mass signal of CPU carries out synchroballistic is: Vox=Vot * (Vp Vpt).Vox is revised oil mass signal output voltage, promptly is scaled the voltage of current oil value correspondence; Vot is a t oil mass signal output voltage constantly, and Vp is the sub-supply power voltage of vehicle oil float under the inactive state, i.e. power supply signal voltage; Vpt is a t power supply signal voltage constantly.
The workflow of the synchroballistic of the real-time collection of the utility model on-vehicle positioning terminal realization oil mass signal 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 voltmeter this moment, regulating vehicle oil float then makes the oil mass gauge pointer show zero position, recording voltage value V2, compare V1 and V2 size, 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 power voltage Vp of vehicle oil float that gathers under the inactive state;
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 by analog to digital converter 65 through impedance protection circuit 64;
5) CPU 1 is carried out synchroballistic correction computing, operation result is scaled the current oil value and sends to display unit 4 to show in real time or send to remote control center 7 by communication unit 3.
The utility model is not limited to above-mentioned execution mode; no matter do any variation on its shape or structure, every on-vehicle positioning terminal that utilizes synchronous acquisition power supply signal and oil mass signal and carry out the synchroballistic computing has all dropped within the utility model protection range.
Claims (5)
1. on-vehicle positioning terminal, the GPS positioning unit, communication unit, the display unit that comprise CPU, are connected respectively with CPU is characterized in that: also comprise the keyboard and the oil mass information acquisition system that are connected with CPU respectively.
2. on-vehicle positioning terminal according to claim 1; it is characterized in that: described oil mass information acquisition system comprises oil mass signal unit, power supply signal unit, voltage gear diverter switch, impedance protection circuit, analog to digital converter; described oil mass signal unit, voltage gear diverter switch, impedance protection circuit, analog to digital converter are linked in sequence, and described power supply signal unit, voltage gear diverter switch, impedance protection circuit, analog to digital converter are linked in sequence.
3. on-vehicle positioning terminal according to claim 2 is characterized in that: the oil mass signal of described oil mass signal unit derives from vehicle oil float subsignal lead-out wire.
4. according to claim 2 or 3 described on-vehicle positioning terminals, it is characterized in that: the power supply signal of described power supply signal unit derives from the power line to the power supply of vehicle oil float.
5. on-vehicle positioning terminal according to claim 1 is characterized in that: described communication unit is connected with remote control center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202275608U CN201726427U (en) | 2010-06-17 | 2010-06-17 | Vehicle-mounted positioning terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202275608U CN201726427U (en) | 2010-06-17 | 2010-06-17 | Vehicle-mounted positioning terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201726427U true CN201726427U (en) | 2011-01-26 |
Family
ID=43494780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202275608U Expired - Fee Related CN201726427U (en) | 2010-06-17 | 2010-06-17 | Vehicle-mounted positioning terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201726427U (en) |
-
2010
- 2010-06-17 CN CN2010202275608U patent/CN201726427U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20180617 |
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| CF01 | Termination of patent right due to non-payment of annual fee |