CN2225027Y

CN2225027Y - Three-switch level detector

Info

Publication number: CN2225027Y
Application number: CN 94228810
Authority: CN
Inventors: 王春厚
Original assignee: Shenyang Institute of Automation of CAS
Current assignee: Shenyang Institute of Automation of CAS
Priority date: 1994-06-07
Filing date: 1994-06-07
Publication date: 1996-04-17
Anticipated expiration: 2004-06-07

Abstract

The utility model relates to a three-switch level detector which belongs to a water level detecting device. The structure of the utility model is composed of a measuring device with three switches and a microcomputer control circuit, wherein, the three switches are arranged on a speed reduction box and are driven by a rotary guide wheel. A rope is arranged on the guide wheel, and both ends of the rope are added with a floating ball and a heavy hammer. When the liquid level changes one centimeter (increase or reduce), the switch is switched on or switched off in one time correspondingly. Thus, the corresponding switching-on or switching-off change of the triple switch is converted into the microcomputer for data processing, and the current value of the liquid level can be judged. The utility model has the advantages that the work is realized by the three switches of the float to replace the complicated code disc and the coded counting equipment, the structure is simple, and the stability and the reliability are realized.

Description

Three switches detect fluid level measuring instrument

The utility model belongs to a kind of condensate tank of dehumidifier.

The level measurement device that uses in various occasions is all contact or capacitor and inductor formula at present, its structure is that code-disc, coding counter, many switches, relay, pressure transducer wait the variation that detects water level, realize showing and reporting to the police by electronic circuit, this kind water level detecting is simple in structure, makes easily its weak point: function limitation, the fixed point boundary that can only represent water level, at the bottom of the precision, poor sensitivity is not suitable for using on the large-scale water surface.

For solving above deficiency, the purpose of this utility model provides a kind of three switches to detect fluid level measuring instrument, utilizes three switches to make the liquid level dynamic symbol, is for data processing by microcomputer, effectively solves the problem that water level accurately detects.

Structural design of the present utility model is achieved in that its structure of this measuring instrument is made up of three switch measurement mechanisms and microcomputer and control circuit; wherein three switch measurement mechanisms are on a fixed support mechanical reduction case to be housed; the reducer casing front end is fixed with the rotation guide wheel; be fixed with rope on the guide wheel; one of rope end is fixed a ball float; the other end is fixed a weight; be fixed with three displacement switch on the disk of reducer casing inboard; switch is welded with extension line respectively and connects (as shown in Figure 4) with microcomputer control circuit at reducer casing this three switch to be housed be JZ1; JZ2 and JZ3; wherein JZ1 and JZ2 are by the output of negative sense diode; be added with the common end grounding line simultaneously; two output leads of switch connect with monostable input end by phase inverter respectively; monostable output terminal connects with R-S trigger input end; R-S trigger output terminal connects with the single-chip microcomputer address input end; while single-chip microcomputer address input end is inserted switch by interface and initial value and is connected; also be connected to the station number switch on the single-chip microcomputer; protection and timer automatically reset; the data output end of single-chip microcomputer connects with memory under program; memory is connected to address latch; latch connects with the demodulation follower by I/O interface and expansion, and detuner inputs to wireless transmitting station with signal.For guaranteeing that equipment operation is intact, microcomputer is connected with accumulator and power-supply controller of electric.

Principle of work: three displacement switch on the rotation guide wheel along with the lifting of tested water level makes the guide wheel rotation by the lifting of ball float, three corresponding break-makes of switch that wheel box is fixing, this three switch is a displacement switch, make the every variation of its liquid level a switch motion be arranged once for one centimetre, the state that three switches change successively, by three connecting lines, give single-chip microcomputer through interface, single-chip microcomputer stores memory once powering on, along with switching signal is constantly imported, single-chip microcomputer is by the data processing of software, the priority of state is judged, just can draw the rising of liquid level, still descend or change up and down in a centimetre, draw the currency of liquid level, again the liquid level currency is given digital display or given the radio station and send through modulator.As liquid level intelligent terminal automatic detection device.Advantage of the present utility model: the detection of liquid level drives three switches with float sensor and realizes, has replaced complicated code-disc or coding counter and relay equipment thereof, joins it and just can measure the liquid level currency with special software.Device structure is simple, and reliability height, water level gauge existing with it relatively have its very big advantage.

Detailed structure of the present utility model is provided by following examples and accompanying drawing.

Fig. 1 is that three switches detect the fluid level measuring instrument structure principle chart;

Fig. 2 is that three switches detect fluid level measuring instrument structure side view;

Fig. 3 is that three switches detect fluid level measuring instrument variator three position of the switch figure;

Fig. 4 is that three switches detect the fluid level measuring instrument electrical schematic diagram.

Its structure is by shown in Fig. 1～3, (1) is the rotation guide wheel, be connected to mechanical reduction case (8) with guide wheel (1), in reducer casing (8), disk is housed, being fixed with three displacement switch (7) (as mercury cut-off etc.) above is evenly distributed on three positions of circumference, three switching cables (2) are drawn signal, be connected on microcomputer and the radio transmitter controller (6), its (3) are water level initial value set terminal, (4) be the modulator connector, (5) be the battery connector, it is weight that guide wheel (1) is gone up they (9), (11) be ball float, (10) be liquid level, ball float (11) moves up and down with liquid level (10), its control circuit as shown in Figure 4, three switches are respectively JZ1, JZ2 and JZ3, have two the tunnel to pass through resistance, backward dioded output, extension line connects+the 5V power supply separately, receive monostable input end by phase inverter, insert the single-chip microcomputer input end through the R-S trigger again, utilize the corresponding switch of one centimetre of the every variation of liquid level (increase or reduce) to cut-off once, the corresponding variation of cut-offfing of three switches is handled the back by single-chip microcomputer show output.

This device has used water level wireless telemetering instrument on the stone door reservoir dam of Changchun, adopt three switch form, and is respond well through trying out of a flood season, and the waterlevel data and artificial survey of issuing central station more only differ from one centimetre, and equipment is reliable and stable.

Claims

1. a switch detects fluid level measuring instrument, it is characterized in that this measuring instrument is made up of three switch measurement mechanisms and microcomputer control circuit, wherein three switch measurement mechanisms are that mechanical reduction case (8) is housed on a fixed support, reducer casing (8) front end is fixed with rotation guide wheel (1), be fixed with rope on the wheel (1), one of end fix a ball float (11), the other end is fixed a weight (9), be fixed with three displacement switch (7) on the disk of reducer casing (8) inboard, three switches are welded with extension line respectively and connect with microcomputer control circuit.

2. by the described measuring instrument of claim 1, three switch JZ1, the JZ2 and the JZ3 that it is characterized in that reducer casing (8), wherein JZ1 and JZ2 are by the output of negative sense diode, be added with the common end grounding line simultaneously, two output lines of switch connect with monostable input end by phase inverter respectively, monostable output terminal connects with R-S trigger input end, and R-S trigger output terminal connects with the single-chip microcomputer address input end.

3. by the described measuring instrument of claim 1, it is characterized in that microcomputer controller (6) is connected to battery connector (5), modulator connector (4) and water level initial value posting port (3).