CN2087356U - Inductive liquid-level stepless-setting auto-control instrument - Google Patents
Inductive liquid-level stepless-setting auto-control instrument Download PDFInfo
- Publication number
- CN2087356U CN2087356U CN 91210060 CN91210060U CN2087356U CN 2087356 U CN2087356 U CN 2087356U CN 91210060 CN91210060 CN 91210060 CN 91210060 U CN91210060 U CN 91210060U CN 2087356 U CN2087356 U CN 2087356U
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- China
- Prior art keywords
- amplifier
- circuit
- controller
- output
- stepless
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- Expired - Lifetime
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Abstract
This device of the utility model is an inductive liquid-level stepless-setting autocontrol. The structure is composed of a probe of the capacitance-type sensor, a circuit controlling board and a control panel which are in the box body. A probe circuit, a voltage amplifier, a current amplifier, a height display-screen circuit of the water level, a displaying and alarming circuit of the water level of the upper and lower limits and a stepless-setting control circuit are arranged on the circuit controlling board. The displaying and alarming can be finally realized through a specialized integrated package circuit. The advantages of this control instrument are that the utility model makes the capacitance-type electric pole as the test probe; the sensibility of the circuit control is high; the displaying speed is fast; the working is stable and reliable; the service life is long; the usage is wide; the utility model can be used in the measuring of various of liquid, hydraulic cylinder, and the acid-base liquid level of the chemical industry.
Description
The utility model relates to a kind of detection alarm device, is adapted to the detection of liquid level, thing position height especially.
Present comparatively general employing electrode mode level controller, the mechanical float-ball type of employing or manual control type are also arranged, the electric pole type controller mainly pulls the plug with electrode, utilize the difference of electrode level height, carry out segmentation sensed water level height, utilize the contact of the power and water utmost point to be produced as the electrode node short circuit of conductor on the relevant position again, reach the purpose that control is reported to the police with the output control signal, its shortcoming is because a small amount of electrolytic reaction will take place the contact of the power and water utmost point, quickened anodizing, electrode is long-time in addition and water contact stain water quality, inflammable and explosive for some, the acid of deep-etching, bases liquid is very dangerous, can't measure for some oils or powdered substance at all, to such an extent as to can't realize stepless setting, high precision shows and warning function.
For overcoming above deficiency, it is a kind of with capacitance probe that the utility model provides, the stepless setting self-actuated controller of induction type liquid level, utilize liquid level to change and detect signal by the probe induction, utilize circuit control panel, show or warning function, the purpose that also can control simultaneously to reach high precision at last.
Design proposal of the present utility model adopts the capacitor induction type sensor probe, circuit control panel and control panel are housed in the casing to be formed, its concrete structure is as follows: the capacitor induction type sensor probe, and by the metallic conductor of a fixed length, the outside is coated with acidproof, alkaline-resisting anticorrosive insulation course, be put into conductor in the medium and form capacitance between the medium, its top is drawn by lead, tightly seals the top with fixed bolt and fastening gland then, be sealing state, the lower end is probe.Be made up of circuit control panel and complete machine power supply in the case, circuit control panel is formed (shown in block scheme) by following control circuit, sensor and output circuit.Voltage amplifier, current amplifier, liquid level display, stepless adjustment control amplifier, the happy bright circuit of audifier and bound.The sensor output circuit is the capacitance that is formed between conductor and medium by the oscillator signal that oscillator produces, produce the DC level of 0～0.8mv, the signal of 0～0.8mv is sent into voltage amplifier, be output as the DC level of 0～5V standard, " 0 " is housed on voltage amplifier to be adjusted and " full scale " adjustment potentiometer, voltage amplifier output wherein one the road to current amplifier, amplify through triode again, its serial connection reometer just has the demonstration of 0～10mA, this reometer is contained on the panel, can be used as to show detection; Another road of voltage amplifier is exported to eight and connect the balance input end of amplifier simultaneously respectively, eight another balance input ends of amplifier by power supply over the ground between by providing between each equivalent divider resistance, pilot lamp of each amplifier out control, because the voltage signal of amplifier balance input end is raise gradually by 0～5V, the pilot lamp of amplifier control is shinny one by one, and the liquid level display screen of being made up of pilot lamp can detect the respective heights of water level; Another road of voltage amplifier is input to four amplifier balance input ends as stepless setting simultaneously, another input end of amplifier is adjusted output terminal by potentiometer respectively and is provided, each current potential all can be set up in 0～5V scope, wherein two amplifiers are directly worked by the triode amplifier pilot relay up and down, relay of the public control of two amplifiers wherein, two amplifier outs are connected in series by the relay node, make this relay be operated in a certain range section, section is outer does not work, three relay output nodes are controlled flashing circuit respectively, flashing circuit adopts the permanent circuit piece to constitute, each circuit block directly controls audible alarm and the water level bound is reported to the police, it is reported to the police and the bound working point, and is adjustable continuously by the potentiometer of amp.in, can fix on the optional position and report to the police.
The control panel structure of casing is as follows; Above the panel left side, reometer is housed, " 0 " that current amplifier is housed is below adjusted and " full scale " adjustment potentiometer, the centre is placed with pilot lamp, be placed with four potentiometers in panel by-level direction, four potentiometers for stepless setting control input end, corresponding pilot lamp is arranged on corresponding potentiometer, the left and right sides is spacing up and down, middle two is " water supply " and " normally " indication, between potentiometer and pilot lamp, switch is housed, be used for inspection machine or online use, below potentiometer, be placed with four two-way switchs side by side, be respectively power supply, report to the police, manually or automatically change, be placed with Music centre loudspeaker and left side height of water level display screen (forming) on the panel right side by pilot lamp.
The utility model has following advantage compared with the prior art.Make test probe with capacitance electrode, circuit control, highly sensitive, display speed is fast, and working stability is reliable, and probe is through handling, polluted water not, long service life, of many uses, can in various liquid, oil cylinder, chemical industry soda acid level gauging, use.
The utility model concrete structure is provided by following examples and accompanying drawing.
Fig. 1 is the stepless setting auto-controller of the induction type liquid level circuit block diagram that the utility model provides;
Fig. 2 is the stepless setting auto-controller of induction type liquid level sonde configuration figure;
Fig. 3 visits system instrument cabinet panel structural drawing automatically for the stepless setting of induction type liquid level;
Fig. 4 is the stepless setting auto-controller of an induction type liquid level electric current and voltage amplifier electrical schematic diagram;
Fig. 5 is that the stepless setting auto-controller of induction type liquid level liquid level shows electrical schematic diagram;
Fig. 6 is the stepless setting electrical schematic diagram of the stepless setting auto-controller of induction type liquid level;
Fig. 7 is sense celebrating formula liquid level stepless setting auto-controller audible alarm and bound flicker electrical schematic diagram;
Describe the concrete structure and the principle of work of the stepless setting auto-controller of induction type liquid level that the utility model provides in detail below in conjunction with accompanying drawing.
Know by Fig. 1 circuit block diagram, (I) is the probe electrical schematic diagram for probe (II), (III) is voltage amplifier, (IV) is the current amplifier indicating circuit, (V) is that liquid level elevation indicator and stepless setting control circuit (VI) are formed, sonde configuration is by shown in Figure 2, in the middle of the probe is a metallic conductor (1), the outside is coated with corrosion-resistant separation layer (2), be fastening gland (3) above, be fastening bolt (4) on gland (3), the probe circuit front is an oscillator, passes through capacitor C X through multiplication of voltage, rectification is output as 0～0.8mv DC level, wherein cx is the capacitance between probe and the measured medium, and along with the variation of liquid level, Cx is also along with being linear change, the signal of output is fitted into voltage amplifier, voltage by resistance coupling input current amplifier, is connected in series electric current gauge outfit, the W of current amplifier by triode after amplifying
2Be zeroing, W
3For transferring full use; Voltage amplifier output is exported to liquid level display screen (as shown in Figure 5) by diode one tunnel, this display screen is eight amplifiers and connects, a wherein input end of amplifier adopts the electric resistance partial pressure method, another input end is the variable voltage signal input, increase along with voltage signal, the separately-driven pilot lamp of amplifier is highlight one by one, from low to high, the liquid level display screen is housed on panel, from display screen, just can find out, pop one's head among the liquid thing liquid level variation situation, voltage amplifier output is input to stepless setting amplifier simultaneously behind diode, (as shown in Figure 6) be four amplifiers and connect that the positive input terminal of each amplifier is set up the working point by potentiometer, makes this amplifier drive triode amplifier work on this working point, triode drives relay, and two-stage is J up and down
1And J
3, middle two-stage is J
2, middle two amplifiers are controlled a relay, are control J
2In a segment limit, set up, pass through J
1, J
2, J
3, just can be controlled in 0～5V and set up, relay is J
1, J
2, J
3Node output direct controlling and driving circuit (as shown in Figure 7), be specifically designed to warning and bound flashing circuit piece by NE555, can realize the display alarm function, directly debug (as shown in Figure 8) by panel during its work, in the middle of the panel is four stepless setting potentiometers, above the correspondence four pilot lamp, the centre is placed with the online individual event switch of inspection machine, is four two-way switchs below, is used for respectively to power supply, report to the police, manually, control usefulness automatically, the left side is the electric current gauge outfit, be two zeroings and accent full scale potentiometer below, in the panel left side is height of water level display screen and right side audible alarm loudspeaker, and this apparatus structure compactness is easy to use, on probation, stable and reliable for performance through half a year.
Claims (6)
1, the stepless setting auto-controller of a kind of induction type is made up of probe and control circuit, it is characterized in that:
1) induction type capacitive transducer probe that is used for detection signal;
2) control circuit is by sensor (I) and output circuit (II), voltage amplifier (III), current amplifier indicating circuit (IV), liquid level elevation indicator (V) and stepless setting control circuit (VI) are formed, its connection is that sensor (I) output circuit generation 0～0.8mv DC level is sent into voltage amplifier (III), by voltage amplifier output wherein one the road to current amplifier, amplify through triode, the serial connection reometer has the demonstration output of 0～10mA, another road of voltage amplifier is exported to eight and connect the balance input end of amplifier, is input to four amplifier balance input ends as stepless setting simultaneously;
3) in the casing front control panel is housed, electric current gauge outfit, stepless setting potentiometer, liquid level height display screen and acoustic alarm are housed on panel.
2, by the described auto-controller of claim 1, it is characterized in that sensor is the metallic conductor (1) of a fixed length, skin is coated with corrosion-resistant separation layer (2), and gland (3) and fastening bolt (4) are housed at the top;
3, by the described auto-controller of claim 1,0～0.8mv signal of the output that it is characterized in that pop one's head in amplifies through voltage amplification and electric current, just has the demonstration of 0～10mA to export on going here and there by the electric current gauge outfit;
4, by the described auto-controller of claim 1, a wherein output terminal that it is characterized in that amplifier is exported to eight and connect the wherein balance input end of amplifier respectively, another balance input end by power supply over the ground between by providing between each equivalent divider resistance, each amplifier is controlled a pilot lamp.
5, by the auto-controller shown in the claim 1, it is characterized in that another road of voltage amplifier outputs to four stepless setting amplifier balance input ends simultaneously, another input end of amplifier is set up output terminal by potentiometer and is provided, each potentiometer can be set up in 0～5V scope, the wherein triode amplifier pilot relay work directly passed through of two amplifiers, two public relays of amplifier in addition, this relay can be operated in certain range section;
6, by the described auto-controller of claim 1, it is characterized in that three relay output nodes control flashing circuit respectively, flashing circuit adopts specialized circuitry piece NE555, directly controls audible alarm and bound water-level alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210060 CN2087356U (en) | 1991-01-21 | 1991-01-21 | Inductive liquid-level stepless-setting auto-control instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210060 CN2087356U (en) | 1991-01-21 | 1991-01-21 | Inductive liquid-level stepless-setting auto-control instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2087356U true CN2087356U (en) | 1991-10-23 |
Family
ID=4918904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91210060 Expired - Lifetime CN2087356U (en) | 1991-01-21 | 1991-01-21 | Inductive liquid-level stepless-setting auto-control instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2087356U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111937A1 (en) * | 2009-03-30 | 2010-10-07 | Huang Wen Pi | Submersible pump with built-in capacitance water-level controller and capacitance water-level controller for submersible pump |
| CN101561307B (en) * | 2009-05-21 | 2011-10-26 | 晶辉电器（深圳）有限公司 | Electronic device for detecting and displaying liquid position and application method thereof |
-
1991
- 1991-01-21 CN CN 91210060 patent/CN2087356U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111937A1 (en) * | 2009-03-30 | 2010-10-07 | Huang Wen Pi | Submersible pump with built-in capacitance water-level controller and capacitance water-level controller for submersible pump |
| CN101561307B (en) * | 2009-05-21 | 2011-10-26 | 晶辉电器（深圳）有限公司 | Electronic device for detecting and displaying liquid position and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |