CN2350739Y

CN2350739Y - Electronic liquid level gauge

Info

Publication number: CN2350739Y
Application number: CN 98242229
Authority: CN
Inventors: 丁俊敏; 丁建新; 娄渊清; 丁建波; 谢明
Original assignee: Yellow River Water Conservancy Committee Information Center
Current assignee: Yellow River Water Conservancy Committee Information Center
Priority date: 1998-11-06
Filing date: 1998-11-06
Publication date: 1999-11-24
Anticipated expiration: 2008-11-06

Abstract

The utility model relates to an electronic liquid level gauge for measuring liquid level, which has the structure that the side wall of a steel glass pipe is provided with stainless steel needles which penetrate the side wall. A decoder circuit board on which a decoder circuit is arranged is sealed in the steel glass pipe. The input end is connected with a data collection terminal, the output end is connected with inner ends of the stainless steel needles which are uniformly distributed on the steel glass pipe wall, and outer ends of the stainless steel needles form measuring probes. The utility model has the advantages of convenient installation and operation and reliable and exact measure and is convenient for realizing automatization of measurement.

Description

The electronic level chi

The utility model relates to a kind of electronic level chi that is used to measure liquid, particularly water level.

The instrument that is used for measuring liquid level (degree of depth) at present is a lot, as accepted scale, artificial observation, or the instrument of robotization has float-type, pressure type and ultrasonic type liquid level gauge, with scale artificial observation inconvenience, trouble, be subjected to the influence of level fluctuation with the float type level gauge amount, generally need well logging reducing level fluctuation, and it is numerous to install and use the comparison fiber crops, the alluvial of silt can cause measuring lost efficacy, pressure and ultrasonic type level gauge are subjected to external factor, as temperature, humidity, the influence of atmospheric pressure etc., the result is inaccurate, and the silt alluvial also can cause pressure-type liquidometer to lose efficacy.

At above-mentioned situation and actual needs, the purpose of this utility model provides the electronic level chi that a kind of measuring liquid level is used, and can effectively solve accurately and the easily problems of measurement of liquid level.

The purpose of this utility model is achieved like this, pass glass reinforced plastic pipe wall stainless pin, dress decoder circuit plate in the glass reinforced plastic pipe, stainless pin exposes the outer formation measuring probe of wall, pars intramuralis divides the output terminal with decoder circuit to connect, stainless pin is evenly distributed on the fiberglass tube wall, and the glass reinforced plastic pipe sealing is in case liquid enters.

The utility model is simple in structure, and is easy to install, measures accurately and reliably, is convenient to realize the robotization of measuring, popularizing application prospect light.

Below in conjunction with the embodiment accompanying drawing structure of the present utility model and working condition are elaborated.

Fig. 1 is a structural profile front view of the present utility model.

Fig. 2 is a decoder circuit diagram of the present utility model.

Provide by Fig. 1, its structure of the utility model is, pass its wall on the sidewall of glass reinforced plastic pipe 1 stainless pin 3 is arranged, decoder circuit plate 2 is equipped with in sealing in glass reinforced plastic pipe 1 inner chamber, decoder circuit is housed on it, decoder circuit input end 5 is drawn the data collection station machine that connects through shielded multiconductor cable, and decoder circuit output terminal 4 connects the stainless pin the inner that is evenly distributed on glass reinforced plastic pipe 1 wall, and the stainless pin outer end constitutes measuring probe.Encapsulating epoxy resin seals tight glass reinforced plastic pipe.

Fig. 2 provides a typical decoder circuit embodiment, this decoder circuit has 8 single data incoming lines, be that D0-D7 and gating allow line and two power leads, output line has 256, links to each other with equally distributed 256 stainless pins in 1CM interval respectively with on being contained in glass reinforced plastic pipe.The present embodiment circuit adopts cmos device, two two or four decoder ic MC14556 and MC14555 to form, and also can stride the capacitor of 0.1 μ f between the power supply of every integrated circuit and the ground, to increase the anti-interference of circuit.(not marking among the figure),

The input end A of integrated circuit 1IC1:A, B is respectively as Data In-Line D6 and D7, allow end E to allow line as the gating of liquid level ruler, its output terminal Q0, Q1, Q2, Q3, connect 2IC1:A respectively, 2IC1:B and 2IC2:A, the permission end E of 2IC2:B, four input end A of integrated circuit 2IC1 and 2IC2 link together as Data In-Line D4, the input end B of integrated circuit 2IC1 and 2IC2 links together as Data In-Line D5,16 output terminals of 2IC1 and 2IC2 are connected 3IC1:A successively, 3IC1:B, 3IC2:A, 3IC2:B, 3IC3:A, 3IC3:B, 3IC4:A, 3IC4:B, 3IC5:A, 3IC5:B, 3IC6:A, 3IC6:B, 3IC7:A, 3IC7:B, 3IC8:A, the permission end E of 3IC8:B, integrated circuit 3IC1,3IC2,3IC3,3IC4,3IC5,3IC6,3IC7, the input end B of 3IC8 links together as code translator Data In-Line D3, integrated circuit 3IC1,3IC2,3IC3,3IC4,3IC5,3IC6,3IC7, the input end A of 3IC8 links together as code translator Data In-Line D2,3IC1-3IC8 has 64 output terminals, connect integrated circuit 4IC1:A successively, 4IC1:B, 4IC2:A, 4IC2:B, 4IC3:A......4IC31:A, 4IC31:B, 4IC32:A, the permission end E of 4IC32:B, integrated circuit 4IC1,4IC2.....4IC31, the output terminal B of 4IC32 links together and is code translator Data In-Line D1, its input end A links together as code translator Data In-Line D0, integrated circuit 4IC1,4IC2...4IC31,256 of the total output terminals of 4IC32, be connected with stainless pin on the glass reinforced plastic pipe successively, output stage integrated circuit 4IC1,4IC2......4IC31, when 4IC32 adopts integrated circuit MC14555, the electronic level chi is a negative electrode ground connection, the positive potential gating, if when adopting integrated circuit MC14556, be just to go back electrode grounding, the negative potential gating.The luffing that present embodiment is measured water level is 256cm, and explanation is from being 1CM.

The utility model in use, its input end is linked to each other with the data collection station machine, finish the work such as processing, transmission of measurement data by data collection station, the glass reinforced plastic pipe contact liq, at illegal state, promptly not during gating, the probe that each stainless pin constitutes is in equipotential to the output terminal of decoder circuit, there is not electric current to produce, the electric current that decoder circuit absorbs minimum (about the order of magnitude of nanoampere) to microampere; When enable state, the output terminal of code translator is selected for use successively according to the input end data variation, probe current potential by gating will change, appearance potential is not poor between the probe of gating, if do not contacted with the conduction liquid level by the probe of gating, because of constituting path, there is not electric current to produce yet, the electric current that decoder circuit absorbs maintains the minimum electric current of illegal state, in case the probe of contact liquid level is selected, this probe and other probes in conducting liquid just constitute the loop by conducting liquid, so the ABSORPTION CURRENT of decoder circuit will be increased sharply to the order of magnitude (the liquid conduction difference of milliampere, its variation is different), the data collection station machine is determined fluid value according to the sudden change of electric current, realizes the purpose of measuring liquid level.

It is to be noted, the present embodiment accompanying drawing is a typical case, if need to increase the luffing of measuring liquid level, afterbody 4IC1......4IC32 can be replaced integrated circuit MC14555 with integrated circuit MC14556, and increase one-level 5IC1......5IC128 is connected with stainless pin as output stage, its measurement range can be increased to 1024CM by 256CM, connected mode between the two-stage is with front 3IC1---3IC8 and 4IC1---, and the connected mode between the 4IC32 is identical, the Data In-Line of afterbody is D0, D1, the Data In-Line of 4IC1-4IC32 becomes D2, D3, the Data In-Line of 3IC1-4IC8 becomes D4, D5, the Data In-Line of 2IC1-2IC2 becomes D6, D7, the Data In-Line of 1IC1 becomes D8, D9, and the like, the maximum degree further can be enlarged.The utility model decoder circuit output terminal can be DN, and stainless pin can be 2N, shown in strapping wires rear portion among Fig. 1.N is a natural integer.

1IC1:A, 2IC1:A in the utility model circuit, 2IC1:B, 2IC2:A, 2IC2:B, 3IC1:A, 3IC1:B ... 3IC8:A, 3IC8:B adopt 4556 decoder ic pieces, and 4IC1:A, 4IC1:B....4IC32:A, 4IC32:B adopt 4555 decoder ic pieces to constitute decoder circuit.

Claims

1, a kind of electronic level chi, it is characterized in that passing its wall on the sidewall of glass reinforced plastic pipe (1) has stainless pin (3), decoder circuit plate (2) is equipped with in sealing in glass reinforced plastic pipe (1) inner chamber, decoder circuit is housed on it, decoder circuit input end (5) is drawn the data collection station machine that connects through shielded multiconductor cable, decoder circuit output terminal (4) connects the stainless pin the inner that is evenly distributed on glass reinforced plastic pipe (1) wall, and the stainless pin outer end constitutes measuring probe.

2, electronic level chi according to claim 1 is characterized in that said decoder circuit is made up of four of CMOS, two two or four decoder ic MC14556 and MC14555.