CN2261015Y

CN2261015Y - Digital gasoline meter for automobile

Info

Publication number: CN2261015Y
Application number: CN 96234515
Authority: CN
Inventors: 曾亚波; 胡维新
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-02
Filing date: 1996-04-02
Publication date: 1997-08-27
Anticipated expiration: 2006-04-02

Abstract

The utility model discloses a digital gasoline meter for an automobile. The utility model is mainly composed of an oil inlet flow sensor 1, an oil outlet flow sensor 2, an interface circuit 3, an interface circuit 4, a measuring and displaying circuit 5, and a power supply circuit 6. On the basis of the components, the utility model is also added with an oil level sensor 7, a speed sensor 9, an interface circuit 8 and an interface circuit 10 which are corresponding to the oil level sensor 7 and the speed sensor 9. The utility model not only can directly measure and display the oil charging quantity and the oil consumption, but also can measure and display the oil consumption value and the reserve oil quantity in an oil tank in unit time and one hundred kilometer. The utility model can also be used as a speedometer and an odometer. If a user adopts the utility model, the user can know the technical performance of an automobile engine at any time, which is good for saving oil and energy so as to enhance the economic benefit of the vehicle operation.

Description

The digital automobile petrol gauge

The utility model relates to a kind of device of measuring fluid flow, is meant that especially a kind of measured automobiles is refueled and the digital automobile petrol gauge of fuel consumption.

Present widely used petrol gauge on the automobile can only be indicated the reserves of gasoline in the fuel tank roughly, can't measure and indicate the oil mass of each adding and used up oil mass exactly, more can't grasp in the unit interval or the automobile oil consumption situation in the mileage necessarily.This problem does not solve, and just can not in depth understand the technical feature of engine thereupon, can not take relevant fuel-economizing Energy-saving Measures pointedly, thereby influence the raising of vehicles operation economic benefit.

The purpose of this utility model is to provide a kind of oil mass that is added can measure and indicate each the oiling exactly time the and the digital automobile petrol gauge that has consumed how many oil masses.

Referring to Fig. 1 the utility model circuit block diagram, solution of the present utility model is as follows.Its circuit part is made up of oil-feed flow sensor 1, fuel-displaced flow sensor 2, interface circuit 3, interface circuit 4, measurement display circuit 5, power circuit 6, the output terminal of oil-feed flow sensor 1 and fuel-displaced flow sensor 2 joins with the input end of interface circuit 3 and interface circuit 4 respectively, the output terminal of interface circuit 3 and interface circuit 4 links to each other with the input end of measuring display circuit 5 respectively, and power circuit 6 is given interface circuit 3, interface circuit 4 and measured display circuit 5 provides dc supply.

The utility model with foregoing circuit structure is when specifically installing and using, oil-feed flow sensor 1 is installed in automotive oil tank oiling porch, fuel-displaced flow sensor 2 is installed in the flowline place of automotive oil tank, the circuit remainder is installed in the instrument case, and allow the display device of measuring in the display circuit 5 can make the digital measurement demonstration on the instrument case panel, this instrument case is installed in the indoor appropriate location of car steering.When refueling a car with running car, oil-feed flow sensor 1 and fuel-displaced flow sensor 2 are exported respectively and the interior linear voltage sensing signal of gasoline flow of unit interval, this voltage sensing signal respectively through interface circuit 3 and interface circuit 4 send measure display circuit 5 and handle after, making accurately by its display device again, volume read-out and fuel consumption numeral show.

The utility model is that motor vehicles are in particular for the enterprising oil pump capacity metering of various automobiles, fuel consumption values timely monitor, a kind of simple and practical digital hi-tech automobile instrument is provided, it helps understanding at any time the technical feature of engine, it is energy-conservation to help fuel-economizing, improves the economic benefit of vehicles operation.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the utility model circuit block diagram;

Fig. 2 is the electric functional-block diagram after having added fuel level sensor and speed pickup and corresponding interface circuit on Fig. 1 the utility model circuit base;

Fig. 3 is the embodiment of a kind of physical circuit of Fig. 2 the utility model electricity functional-block diagram.

Referring to Fig. 2, on the basis of Fig. 1 the utility model circuit structure, can add fuel level sensor 7 and interface circuit 8, and the output terminal of fuel level sensor 7 and the input end of interface circuit 8 are joined, the output terminal of interface circuit 8 is linked to each other with the input end of measuring display circuit 5, and power circuit 6 provides dc supply to interface circuit 8.When actual installation was used, fuel level sensor 7 can adopt the existing fuel level sensor that is contained in the automotive oil tank.Like this, just the voltage sensing signal that fuel level sensor 7 can be measured is delivered to through interface circuit 8 and is measured display circuit 5, by circuit 5 make level height is converted into the processing of capacity after, transfer to display device and make accurately that the numeral of fuel tank Fuel Oil Remaining shows (it is the most accurate to measure) when automobile be in the horizontal stationary state.Equally, on the basis of Fig. 1 the utility model circuit structure, also can add speed pickup 9 and interface circuit 10, and the output terminal of speed pickup 9 and the input end of interface circuit 10 are joined, the output terminal of interface circuit 10 is linked to each other with the input end of measuring display circuit 5, and power circuit 6 provides the on-line operation power supply to interface circuit 10.When actual installation was used, speed pickup 9 can adopt the existing magnetoelectric tachometric transducer of automobile, was installed in speedometer for automobile watch core interface.Like this, just the voltage sensing signal that speed pickup 9 can be measured is delivered to through interface circuit 10 and is measured display circuit 5, by its display device make accurately that fuel consumption per hundred kilometers shows or (with) fuel consumption values shows in the unit interval.

Referring to Fig. 3.Oil-feed flow sensor 1 and fuel-displaced flow sensor 2 all can adopt LW type turbo flow meter, interface circuit 3 and interface circuit 4 all can be made up of not gate IC1 and IC2, resistance R 1 to R4 and capacitor C 1, measure display circuit 5 and mainly is made up of single chip microcomputer IC3, charactron driving circuit IC4, group of four figures LED, display switching key K1 and reset key K2, the output terminal of IC2 is held with the T1 of IC3 respectively and INT0 holds and joins in interface circuit 3 and the interface circuit 4.IC1 and IC2 all can adopt CD4069 (1/6), and IC3 can adopt 89C51 or 89C52, and IC4 can adopt 74LS164 * 4, and LED can adopt LA5011-11.Power circuit 6 can adopt DC converter 12D12S5C.Speed pickup 9 also can adopt alternate manners such as photoelectricity, hall device except that can adopting the magnetoelectricity mode.Interface circuit 8 and interface circuit 10 all can be made up of V/f conversion chip IC5, chip outer meeting resistance R5 to R10, potentiometer R11 and capacitor C 2 to C4, and the output terminal of IC5 is held with the INT1 of IC3 end and PI.O respectively and joined, and IC5 can adopt LM331.

In Fig. 3, oil-feed flow sensor 1 and fuel-displaced flow sensor 2 direct output pulse signals, and the linear N=KQ of flow Q of umber of pulse N and unit interval, K is a meter constant in the formula, the amplification and rectification circuit that pulse signal is formed via IC1, IC2 etc., send T1 and the INT0 end of single chip microcomputer IC3 respectively, the IC3 management of portion's application software within it controls down, finishes accumulation, scale conversion and send display process.Under the situation of not installing fuel level sensor 7, then the fuel tank Fuel Oil Remaining is obtained by the difference into and out of oil mass.In Fig. 3 embodiment, by IC5 chip in the interface circuit 8 and external R, C element thereof, become the frequency signal of 0～10KHZ to send the INT1 end of IC3 0～5V voltage transitions of fuel level sensor 7 outputs, single-chip microcomputer is under the cooperation of timer T0, by the software counting, finish measurement, scale conversion and send display process the frequency f 3 that is proportional to level height.Equally, by IC5 chip in the interface circuit 10 and external R, C element thereof, the voltage transitions that speed pickup 9 is exported becomes frequency signal to send the interface PI.O end of IC3, and IC3 is converted into speed with tach signal, and accumulation obtains mileage, send display process.Digital LED is to the measurement of IC3, and operation result shows with digital form, switches with key K1, as long as a display window demonstration just capable of circulation is all measured, K2 is a reset key, by this key, will show pairing amount zero clearing.According to actual needs, also extendible speed, mileage show, get final product double as speed, mileometer.Single chip microcomputer part among Fig. 3 embodiment can realize that also also customizable special IC realizes that also the available digital integrated circuit combines with programmable integrated circuit (as FPGA, GAL etc.).The input terminal voltage of power circuit 6 can adopt direct current 24V or 12V battery tension own on the automobile.

Claims

1, a kind of digital automobile petrol gauge, it is characterized in that, circuit part is by oil-feed flow sensor (1), fuel-displaced flow sensor (2), interface circuit (3), interface circuit (4), measure display circuit (5), power circuit (6) is formed, the output terminal of oil-feed flow sensor (1) and fuel-displaced flow sensor (2) joins with the input end of interface circuit (3) and interface circuit (4) respectively, the output terminal of interface circuit (3) and interface circuit (4) links to each other with the input end of measuring display circuit (5) respectively, and power circuit (6) is given interface circuit (3), interface circuit (4) and measurement display circuit (5) provide dc supply.

2, digital automobile petrol gauge as claimed in claim 1, it is characterized in that, in circuit, add fuel level sensor (7) and interface circuit (8), and the output terminal of fuel level sensor (7) and the input end of interface circuit 8 are joined, the output terminal of interface circuit (8) is linked to each other with the input end of measuring display circuit (5), and power circuit (6) provides dc supply to interface circuit (8).

3, as claim 1,2 described digital automobile petrol gauge, it is characterized in that, in circuit, add speed pickup (9) and interface circuit (10), and the output terminal of speed pickup (9) and the input end of interface circuit (10) are joined, the output terminal of interface circuit (10) is linked to each other with the input end of measuring display circuit (5), and power circuit (6) provides the on-line operation power supply to interface circuit (10).

4, digital automobile petrol gauge as claimed in claim 1, it is characterized in that, interface circuit (3) and interface circuit (4) all can be made up of not gate IC1 and IC2, resistance R 1 to R4 and capacitor C 1, measure display circuit (5) and mainly is made up of single chip microcomputer IC3, charactron driving circuit IC4, group of four figures LED, display switching key K1 and reset key K2, the output terminal of the middle IC2 of interface circuit (3) and interface circuit (4) is held with the T1 of IC3 respectively and INT0 holds and joins.

5, digital automobile petrol gauge as claimed in claim 3, it is characterized in that, interface circuit (8) and interface circuit (10) all can be made up of V/f conversion chip IC5, chip outer meeting resistance R5 to R10, potentiometer R11 and capacitor C 2 to C4, and the output terminal of IC5 is held with the INT1 of IC3 end and PI.O respectively and joined.