CN201297951Y

CN201297951Y - Automobile oil gauge

Info

Publication number: CN201297951Y
Application number: CNU2008201685542U
Authority: CN
Inventors: 徐奕; 张益铭
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-01
Filing date: 2008-12-01
Publication date: 2009-08-26
Anticipated expiration: 2018-12-01

Abstract

The utility model discloses an automobile oil gauge which is provided with a sensor consisting of a stand, a strain sensor and a floating pontoon, wherein the stand is arranged at the top of an oil tank; one end of the strain sensor is fixedly hung below the stand, and the other end of the strain sensor is fixedly hung with the floating pontoon; the floating pontoon is vertical downwards, a clearance is left between the bottom of the floating pontoon and the bottom of the oil tank, and the shapes of the cross sections of the floating pontoon and the oil tank on the same height are same, and the areas are both decreased according to the same proportion; and the oil gauge adopts an electronic scale circuit. The floating power of the floating pontoon is just the weight of oil after being amplified according to the proportion, and the floating power is measured by the strain sensor and displayed by the oil gauge, thereby precise measurement is achieved. The utility model has the advantages of long service life and good reliability.

Description

The automobile oil mass meter

Technical field

The utility model relates to the meter electronics tool, particularly to the improvement of automobile oil mass metering device.

Background technology

Existing automobile oil mass meter comprises sensor and oil meter.

Sensor is that support is provided with multilevel resistance or resistance wire winding, also has a support that can rotate around the axis on the support, support is provided with contact, the corresponding contact of contact is on the contact pin or resistance wire winding of multilevel resistance, float is installed in an end of float rocking bar, and the other end of rocking bar is that to be fixed on above-mentioned support be on the rocker bracket to support end.When oil level changed, float drove rocking bar and rocker bracket swing, and contact moves, and the resistance value of device changes.

Oil meter is by the variation of sensor resistance, and what of oil mass are correspondence demonstrate.

In sensor, because by behind the endplay device, the degree of accuracy of perception oil level height is poor, in addition, adopts multilevel resistance or resistance wire winding, the superincumbent trickle mobile deficiency of contact so that output resistance change, sensor can't measure trickle oil mass to be changed, and precision is not high, and resolution is greatly between 0.5-1 rises, can only can't adapt to the needed high precision of present vehicle-mounted computer as with reference to indication.

Also have, existing apparatus is the contact structure, and wearing and tearing are become flexible between the reduction of contact elasticity, wearing and tearing, rocker bracket rotating shaft and support, all can cause loose contact, and functional reliability is poor, and serviceable life is short.

Summary of the invention

The utility model purpose is to provide a kind of high-precision contactless automobile oil mass metering device, with the purpose of realization accurate measurement, and the functional reliability of raising device, prolong its serviceable life.

Scheme of the present utility model is: the automobile oil mass meter, comprise sensor and oil meter, it is characterized in that: sensor comprises support, strain transducer, floating drum, support is contained in the top of fuel tank, one end of strain transducer is fixedly hung below support, fixedly is hung with floating drum at the other end of strain transducer, and floating drum vertically downward, leave the gap at the bottom of bottom and the fuel tank, floating drum and fuel tank are all identical at the shape of cross section of each equal height point, area all dwindles by same ratio; Oil meter adopts the electronic scale circuit.

In the electronic scale circuit, by adjusting enlargement factor, the numerical value that makes demonstration is in the ratio of floating drum and fuel tank cross-sectional area and combine the density amplification of oil plant, is converted to bulking value.

The utility model has the advantages that: because floating drum and fuel tank are all identical at the shape of cross section of each equal height point, area all dwindles by same ratio, so its suffered buoyancy size is after amplifying in the ratio of floating drum and fuel tank cross-sectional area, be exactly the weight of oil plant, this buoyancy is measured by strain transducer, show by oil meter, can reach accurate metering.In addition, because motion is not worn and torn, do not electrically contacted wearing and tearing, the life-span of sensor is long, the good reliability of whole device.

Description of drawings

The utility model is described in further detail with embodiment with reference to the accompanying drawings below.

Fig. 1 is the structural representation of sensor of the present utility model.

Fig. 2 is that sensor is contained in the structural representation on the fuel tank.

Mark among the figure: 1 lead-in wire, 2 supports, 3 lead-in wire geometrical clamps, 4 strain transducers are installed screw, 5 strain transducers, 6 floating drums, 7 floating drums are hung screw, 8 fuel tank cap, 9 fuel tanks.

Embodiment

Sensor in this device and oil meter, most importantly Design of Sensor.

Referring to Fig. 1 and Fig. 2, sensor mainly comprises support 2, strain transducer 5, floating drum 6, and support 2 is contained in the top of fuel tank 9, and is the same with the installation of existing sensor.One end of strain transducer 5 is fixedly hung below support 2, fixedly is hung with floating drum 6 at the other end of strain transducer 5, floating drum 6 vertically downward, height leaves the gap a little more than the actual charge of oil height of fuel tank at the bottom of bottom and the fuel tank.

Floating drum 6 and fuel tank 9 are all identical at the shape of cross section of each equal height point, area all dwindles by same ratio.Such as some fuel tank is cube, and then floating drum adopts height and the actual charge of oil height of fuel tank is equal, xsect is identical with the fuel tank bottom surface square; Such as fuel tank is shown in Figure 2 tab-like, and then floating drum also has the outstanding of same ratio at equal height point; Such as fuel tank is abnormity, and then floating drum also is an abnormity, and is just laterally scaled.Such purpose is that the suffered buoyancy size of floating drum is directly proportional fully with the weight of oil plant.

Like this, oil mass is many more in the fuel tank, and the suffered buoyancy of floating drum is big more, otherwise more little, this buoyancy is exported different parameters in strain transducer.

Oil meter adopts the electronic scale circuit, and this is a known technology, and principle is no longer narrated.

In the electronic scale circuit, by set removing the gravity of floating drum itself, adjust enlargement factor in addition, the numerical value that makes demonstration is in the ratio of floating drum and fuel tank cross-sectional area and combine the density amplification of oil plant, is converted to bulking value.

This measurement device precision height, one 50 liters fuel tank, the floating drum xsect of employing is 1/100 of a fuel tank xsect, and resolution reaches 50ml, and precision is a per mille.

Claims

1. automobile oil mass meter, comprise sensor and oil meter, it is characterized in that: sensor comprises support (2), strain transducer (5), floating drum (6), support (2) is contained in the top of fuel tank (9), one end of strain transducer (5) is fixedly hung the below in support (2), the other end at strain transducer (5) fixedly is hung with floating drum (6), floating drum (6) vertically downward, leave the gap at the bottom of bottom and the fuel tank, floating drum (6) and fuel tank (9) are all identical at the shape of cross section of each equal height point, area all dwindles by same ratio; Oil meter adopts the electronic scale circuit.

2. automobile oil mass meter as claimed in claim 1 is characterized in that: in the electronic scale circuit, by adjusting enlargement factor, the numerical value that makes demonstration is in the ratio of floating drum and fuel tank cross-sectional area and combine the density amplification of oil plant, is converted to bulking value.