CN2194505Y

CN2194505Y - Liquid container automatic digital diplayer

Info

Publication number: CN2194505Y
Application number: CN 93235101
Authority: CN
Inventors: 蒋扬义; 蒋勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-26
Filing date: 1993-11-26
Publication date: 1995-04-12
Anticipated expiration: 2003-11-26

Abstract

The utility model relates to a liquid container automatic digital displaying device, and the sensor arranged at a container point can convert liquid height, temperature and other situation into corresponding electrical signal. The electrical signal can be input in an A/D converter through amplifying by a transmitter, and the digital signal output from the A/D converter can be sent to a displayer after decoking by a decoder. With the switching control of a signal transfer switch, the utility model can respectively display the situations of liquid height, temperature, etc. in the container The utility model has accurate measuring height, strong visualizability and convenient operation and is suitable for displaying the liquid situation in the container in high altitude, far distance, noxious material and other places, and the utility model can also be used for long distance display the water level in rivers and lakes.

Description

Liquid container automatic digital diplayer

The utility model provides a kind of automatic digital indicator of liquid container that liquid in container height, temperature etc. are monitored.

At present, show, be still and adopt traditional float to connect the indication of weight structure that directly insert the method for thermometer, resolution is low, error is big, and is not suitable for high-altitude, long distance and exists the place of harmful substance to use for the survey of liquid height, temperature etc. in the tun.

The purpose of this utility model is for overcoming above-mentioned weak point, and a kind of degree of accuracy height is provided, and intuitive is strong, and is easy to use, is applicable to the automatic digital indicator of liquid container in various places.

The automatic digital indicator of liquid container of the present utility model comprises mounting box, it is characterized in that its operating circuit is made up of stabilized voltage supply, sensor, transmitter, A/D converter, code translator, display.Stabilized voltage supply provides dc supply, the sensor that is installed in the container place converts situations such as liquid height, temperature to corresponding electric signal, input a/d converter after transmitter amplifies, the digital signal of A/D converter output is sent into display after decoder for decoding, by the conversion and control of signal switch, situations such as the height of liquid in container, temperature are shown respectively.

Fig. 1 is the utility model structural drawing;

Fig. 2 is the utility model electricity theory diagram;

Fig. 3, Fig. 4 are the utility model circuit diagram;

Fig. 5, Fig. 6 are respectively main circuit printed panel arrangements of elements face and face of weld;

Fig. 7 is the panel printed circuit board (PCB).

Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.

The stabilized voltage supply I comprises power transformer T ₁, commutation diode D ₃, D ₄, D ₅, D ₆, three-terminal voltage-stabilizing integrated package U ₅(LM7905), U ₆(LM7805), capacitor C ₇, C ₈, C ₉, C ₁₀, C ₁₁, C ₁₂, C ₁₃, C ₁₄T ₁Secondary and D ₃～D ₆Be connected into bridge rectifier circuit, rectification circuit output end respectively and meet C ₇, C ₈, C ₁₃, C ₁₄Series arm, U ₆1 pin, U ₅2 pin connect rectification circuit respectively and export positive and negative end, U ₆, U ₅3 pin be respectively the V of stabilized voltage supply output _CCAn end and a 5V hold, and output end of stabilized voltage supply respectively and meet C ₉, C ₁₀, C ₁₁, C ₁₂Series arm, C ₉, C ₁₀, C ₁₁, C ₁₂, C ₇, C ₈, C ₁₃, C ₁₄Tie point and U ₅1 pin, U ₆2 pin and ground connection.

The sensor II comprises

bearing seat

5,6, rotating shaft 7, and runner 8, float 4, weight 2, connection cord 3, variable resistor 9(is R25), thermo-sensitive resistor 1(is R26).Rotating shaft 7 is fixed on runner 8 in the rotating shaft 7 with stop screw after passing runner 8 center pits, rotating shaft 7 two ends are movably connected in the

bearing seat

5,6, wherein an end is connected with the handler of variable resistor 9 after passing bearing seat, variable resistor 9 is fixed on the bearing seat by web joint,

bearing seat

5,6 is installed on the container top surface, be wrapped in the groove of runner 8 peripheries after connection cord 3 one ends are fixed on the runner 8, connection cord 3 other ends are fixedly float 4, weight 2 successively, and thermo-sensitive resistor 1 places in the liquid.By connecting lead circuit in variable resistor 9, thermo-sensitive resistor 1 and the mounting box is electrically connected, the tie point of the movable end of variable resistor 9, a stiff end and connecting resistance R7, R8 wherein, an end of thermo-sensitive resistor 1 connects resistance R ₁₇, R ₁₈Tie point.Their other end and ground connection.

In the transmitter III, resistance R ₂₀An end, amplifier integrated block U ₃(LM324) A, U _3B, U _3C+ hold and connect the output V of stabilized voltage supply I _CCEnd, U _3A, U _3B, U _3CAn end and ground connection, R ₂₀The other end and resistance R ₅An end, voltage stabilizing diode D ₁Negative pole and meet D ₁Plus earth, R ₅The other end and potentiometer R ₆One stiff end, U _3A2 pin and meet R ₆Movable end and another stiff end and ground connection, U _3A3 pin, 1 pin and potentiometer R ₂₃One stiff end, resistance R ₇, R ₁₇One end, potentiometer R ₁₁, R ₁₅One stiff end and movable end also meet R ₂₃Another stiff end ground connection, R ₇The other end connects resistance R ₈Back and resistance R ₉One end, U _3B5 pin also meet R ₁₁Another stiff end and potentiometer R ₁₂One stiff end, U _3B6 pin also meet R ₁₂Another stiff end and movable end and ground connection, R ₉The other end and U _3B7 pin, potentiometer R ₁₃One stiff end also meets R ₁₃Another stiff end ground connection, R ₁₃Movable end connects gang socket P ₃4 pin, R ₁₇The other end connects resistance R ₁₈Back and resistance R ₁₉One end, U _3C10 pin also meet R ₁₃Another stiff end and potentiometer R ₁₆One stiff end, U _3C9 pin also meet R ₁₆Another stiff end and movable end and ground connection, R ₁₉The other end and U _3C8 pin, potentiometer R ₁₄One stiff end also meets R ₁₄Another stiff end and

P

₃2,3 pin and ground connection, R ₁₄Movable end connects P ₃1 pin.

In the A/D converter IV, integrated package U ₁(7135) 1～20 pin connects 5V end, R respectively ₂₃Movable end, ground connection, crystal diode D ₂Negative pole and capacitor C ₃One end, capacitor C ₄One end, resistance R ₁₀One end, C ₅One end, C ₅The other end, ground connection, capacitor C ₆One end and signal output line end P ₄, V _CCEnd, integrated package U ₂8 pin, 7 pin, 1 pin, 2 pin, 6 pin, resistance R ₁One end, resistance R ₂One end, resistance R ₃One end, resistance R ₄One end, U ₁22 pin connect integrated package U ₄3 pin, D ₂Cathode series resistance R ₂₄Back ground connection, C ₃The other end and C ₄, R ₁₀The other end and meet C ₆Other end ground connection, integrated package U ₄(ME555) 1 pin and capacitor C ₂An end and ground connection, 2,6 pin and C ₂The other end, potentiometer R ₂₂One stiff end also connects, 4,8 pin and resistance R ₂₁One end also meets V _CCEnd, 7 pin and R ₂₁The other end, R ₂₂Another stiff end and movable end also connect.

Code translator V is by integrated package U ₂(4513), capacitor C ₁Constitute.

U

₂3,4 pin and C ₁One end also meets V _CCEnd, C ₁Other end ground connection, 5 pin ground connection, 15,14,13,12,11,17,16,10 pin connect gang socket P respectively ₁1～8 pin.

In the display VI, transistor Q ₁, Q ₂, Q ₃, Q ₄Base stage connect R respectively ₁, R ₂, R ₃, R ₄The other end, collector connects gang socket P respectively ₂1～4 pin, emitter and ground connection.Voltage comparator U ₇(LM339) A-end, U _7B+ end, pilot lamp L ₅, L ₆An end and ground connection, U _7A2 pin, U _7B1 pin connect L respectively ₅, L ₆The other end, U _7A+ end, U _7B-end splice connection socket P ₃3 pin, U _7A4 pin, resistance R ₂₇One end, U _7B+ hold and connect signal switch S ₁10 pin, U _7A5 pin, U _7B6 pin, resistance R ₂₈One end also meets S ₁5 pin, R ₂₇, R ₂₈Other end ground connection,

S

₁1,6 pin and meet signal connection end P ₄, 3,8 pin connect P respectively ₃1,4 pin, P ₃2 pin ground connection.Charactron L ₁, L ₂, L ₃,

L

₄1,2,4,5,6,7,8,9,10 pin respectively and connect, their 3 pin connect gang socket P respectively ₂1,2,3,4 pin, gang socket P ₁1～7 pin connect L respectively ₂1,2,4,5 pin,

L

₁6,7,8 pin.Each electronic component press Fig. 5, Fig. 6, Fig. 7 and welding shown in Figure 1 good after, be fixed in the mounting box, on the panel and container place, be connected with lead between mounting box and the container, and draw power input line from mounting box.

The utility model is surveyed and is shown the degree of accuracy height owing to adopting above design, and intuitive is strong, and is easy to use, is applicable to high-altitude, long distance, exists the vessel liquid situation survey in places such as harmful substance to show that the remote survey that also can be used for the rivers and lakes water surface is shown.

Claims

1, the automatic digital indicator of a kind of liquid container, comprise mounting box, the operating circuit that it is characterized in that it is by stabilized voltage supply (I), sensor (II), transmitter (III), A/D converter (IV), code translator (V), display (VI) is formed, stabilized voltage supply (I) provides dc supply, the sensor (II) that is installed in the container place is with liquid height, situations such as temperature convert corresponding electric signal to, input a/d converter (IV) after transmitter (III) amplifies, the digital signal of A/D converter (IV) output is sent into display (VI) after code translator (V) decoding, conversion and control by signal switch, height to liquid in container, situations such as temperature show respectively, wherein sensor (II) comprises bearing seat (5), (6), rotating shaft (7), runner (8), float (4), hammer (2) hangs down, connection cord (3), variable resistor (9), thermo-sensitive resistor (1), rotating shaft (7) is fixed on runner (8) in the rotating shaft (7) with stop screw after passing runner (8) center pit, rotating shaft (7) two ends are movably connected in bearing seat (5), (6) in, wherein an end is connected with the handler of variable resistor (9) after passing bearing seat, variable resistor (9) is fixed on the bearing seat by web joint, bearing seat (5), (6) be installed on the container top surface, connection cord (3) one ends are fixed on and are wrapped in the groove of runner (8) periphery after runner (8) is gone up, connection cord (3) other end is fixing float (4) successively, hammer (2) hangs down, thermo-sensitive resistor (1) places in the liquid, by connecting lead with variable resistor (9), thermo-sensitive resistor (1) is electrically connected with the interior circuit of mounting box, wherein the movable end of variable resistor (9), one stiff end also connects resistance R in the transmitter (III) ₇, R ₈Tie point, an end of thermo-sensitive resistor (1) connects resistance R ₁₇, R ₁₈Tie point, their other end and ground connection after each electronic component welds, are fixed in the mounting box, on the panel and container place, and draw power input line from mounting box.