CN2108906U

CN2108906U - Continuous test, display, control and alarm senser for liquid level or level of fluent solid material

Info

Publication number: CN2108906U
Application number: CN 90222304
Authority: CN
Inventors: 周永贵; 周永良
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-11
Filing date: 1990-10-11
Publication date: 1992-07-01

Abstract

The utility model relates to a continuous test, display, control and alarm sensor for material level and liquid level, which belongs to the technical field of electrical engineering. The utility model is composed of a troughlike supporting frame used as a main body, wherein, a variable resistor sheet is installed in the supporting frame, arched elastic materials are arranged outside the supporting frame to seal the variable resistor sheet in the troughlike supporting frame used as the main body, and aluminum thin bars are conglutinated in the arched elastic materials; When material generates pressure to the arched elastic material, parts of the inner aluminum thin bars, which are pressed by the materials can be short-circuited by the variable resistor sheet, and variable resistance value follows the position of the materials to change. The signals of the senor can also be directly inputted into a power level display circuit, and then, the height of gasoline of a gasoline tank of a motorcar and the height of the material level of a material tank are simulated and displayed by a luminous diode.

Description

Continuous test, display, control and alarm senser for liquid level or level of fluent solid material

The utility model belongs to the electro-engineering technical field.

The domestic neither one of going back adapts to various media at present, various environment, dependable performance, energy METHOD FOR CONTINUOUS DETERMINATION, the material level liquid level sensor that shows, controls, reports to the police.

Be well known that condenser type material level liquid level sensor, its shortcoming is the influence that is subjected to material moisture content and electrical conductivity fluctuation, poor reliability.Also having a kind of is the Weight type charge level sensor, and its shortcoming is a timing sampling, in addition can not the test liquid material, can not adapt to the big and very strong particular surroundings of corrosivity of various dust.Therefore, do not possess practicality and reliability.

The purpose of this utility model provides a kind of to graininess, the mensuration of powdery and various liquid material position in container, demonstration, control, warning sensing device.

The purpose of this utility model is to realize like this, with a main body rack that flute profile is consistent with the batch can height, this flute profile main body rack simultaneously is fixed on the inwall of batch can, again the variable resistive film consistent with the batch can height is bonded in the holder of spill bakelite, by the fixed base plate in the flute profile main body rack, through set bolt holder of spill bakelite and variable resistive film are fixed in the flute profile main body rack, the outside is enclosed in variable resistive film in the flute profile main body rack with the arch resilient material.Be stained with an aluminium in the inside of this arch resilient material thin, the lower end of the thin bar of aluminium is connected with the lower end of resistor disc, when material produces pressure to the arch resilient material, the thin bar of arch resilient material and aluminium is presented variable displacement simultaneously, thin bar of the aluminium of the inside and resistor disc join, and this a part of resistor disc short circuit that material pressure is arranged is fallen.Material level is high more, and is just many more by the resistance of short circuit, and remaining effective resistance value is just more little.Material level is low more, and is just few more by the resistance of short circuit, and remaining effective resistance is just big more.Variable resistive film along with the material pressure change in location is inserted in the biasing circuit of resistance bridge or amplifier, demarcate, just can realize material level liquid level METHOD FOR CONTINUOUS DETERMINATION, the sensing purpose that shows, controls, reports to the police through reality.

Major advantage of the present utility model is the applicable scope broad, big makes tens meters sensors consistent with the batch can height, and little can be contained in the height that shows oil level in the automotive oil tank.In addition, because this sensor is to utilize flute profile metal or rigid plastic to be main body rack, variable resistor is fixed in the middle of the flute profile, sealing through the arch resilient material, variable resistor is not subjected to the erosion of extraneous any harmful object and corrosivity object, change the material of arch resilient material and main body rack, just can adapt to various measured mediums, to satisfy the sensing requirement of various particular surroundingss and condition.

The concrete structure of utility model is provided by following examples and accompanying drawing thereof;

Fig. 1 is according to the sensor vertical view cutaway drawing that the utility model proposes.

Fig. 2 looks cut-open view according to a sensor left side that the utility model proposes.

Describe in detail according to the details and the principle of work that the utility model proposes concrete device below in conjunction with Fig. 1 and Fig. 2.

In flute profile main body rack (1) lining, variable resistive film (4) is bonded in the spill bakelite holder (6) through cementing agent, be located by set bolt (7) and fixed base plate (5).Outmost is arch resilient material (2), is stained with the thin bar (3) of aluminium in its inside, through sealing press strip (8) and blind bolt (10) all parts is packaged as a whole, and (9) are the variable resistive film extension lines.When material produces pressure to arch resilient material (2), the thin bar (3) of arch resilient material (2) and aluminium is presented variable displacement simultaneously, to there be material to press that this a part of variable resistive film (4) short circuit is fallen, the material pressure position is high more, also just many more by the resistor disc of short circuit (4), the remaining effective resistance value of resistor disc (4) is just more little.Otherwise the material pressure position is low more, and also just few more by the resistor disc of short circuit (4), the remaining effective resistance value of resistor disc (4) is just big more.Therefore, this variable resistive film with the material pressure change in location (4) has been realized the utility model material level liquid level METHOD FOR CONTINUOUS DETERMINATION, the sensing that shows, controls, reports to the police.

The utility model is realized material level liquid level METHOD FOR CONTINUOUS DETERMINATION, demonstration, control, warning by following mode.

1, can be connected with microcomputer, all batch cans are installed this sensor in production technology respectively, and these signal of sensor are amplified demarcation respectively, input to microcomputer through the A/D change-over circuit, intuitively show the simulation controlling level and the actual storing amount of batch can.Be controlled at material level in the certain altitude if desired or want to realize the controlling level limiting alarm, can realize the start and stop of sound and light alarm and relay switch control charging equipment by voltage comparator circuit.

2, this sensor can be done the demonstration of automotive oil tank oil level and report to the police.Show integrated circuit through level, add five light emitting diodes, by three end power module voltage stabilizings, avoid the fluctuation of battery current, again the oil level reometer of former automobile is made into voltage table, on the voltage dial plate, open five holes, five light emitting diodes are contained in respectively in five holes of dial plate, second luminotron of dial plate low-voltage end opened with other colouring discrimination, in order to alarm indication directly perceived as the fuel level in tank lower limit, draw the voice-control alarm signal at the cathode terminal of this diode, realize voice-control alarm through amplifier and loudspeaker.

3, this signal of sensor also can directly cooperate digital display voltage table, demarcates through reality, and voltage demonstration amount is adjusted unanimity with the batch can true altitude, and the amount of digital voltmeter demonstration is exactly a batch can controlling level rice like this.

Claims

1, a kind of material level liquid level METHOD FOR CONTINUOUS DETERMINATION, demonstration, control, alarm sensor, a flute profile main body rack (1) is arranged on this device, a variable resistive film (4) is housed therebetween, the outside is arch resilient material (2), be stained with the thin bar (3) of aluminium in its arch resilient material the inside, it is characterized in that variable resistance sheet (4) under material pressure, the pressurized feedback variable displacement change resistance by arch resilient material (2) and the thin bar (3) of aluminium realizes the material level sensing.

2, sensor according to claim 1 is characterized in that resistor disc (4) but the wire-wound resistor sheet, also plastics resistor disc or carbon film resistance plate and other variable element etc., and the shape of resistor disc also can be made garden shape and square and other shape.

3, sensor according to claim 1 is characterized in that arch resilient material (2) but rubber, metal, plastics itself and it have the material of spring function.

4, sensor according to claim 1 is characterized in that the arch resilient material can be made into multiple shape, as long as possess spring function.

5, sensor according to claim 1 is characterized in that resistor disc (4) also can be made into various variable inductances and variable capacitance, to realize the material level sensing.