CN2261620Y - Digital water level meter - Google Patents
Digital water level meter Download PDFInfo
- Publication number
- CN2261620Y CN2261620Y CN 95240966 CN95240966U CN2261620Y CN 2261620 Y CN2261620 Y CN 2261620Y CN 95240966 CN95240966 CN 95240966 CN 95240966 U CN95240966 U CN 95240966U CN 2261620 Y CN2261620 Y CN 2261620Y
- Authority
- CN
- China
- Prior art keywords
- water level
- pin
- sensor
- mpx2100
- level meter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to a digital water level meter whose water-level signals are gave by a sensor and are displayed by a liquid crystal meter after be amplified by an amplifier. The digital water level meter is characterized in that the pin 1 and the pin 3 of the MPX2100 sensor are connected with the output voltage-stabilizing source of an amplifier 1 [1], the pin 2 and the pin 4 of the MPX2100 sensor are respectively connected with the positive electrodes of the double-differential amplifiers of A < 2 > and A < 3 >, the output ends of the A < 2 > and the A < 3 > are connected with the 3.5 liquid-crystal meter, wherein, the pressed hole 1 of the MPX2100 sensor is connected with a U-shaped tube 2, and the U-shaped tube 2 is provided with a micropore on the probe casing part.
Description
The utility model relates to a kind of digital water level meter of measuring underground water table in hydrogeology work.
Water level gauge is bailing test and the necessary instrument of underground water table dynamic monitoring.The general manual electric fluviograph measurement underground water table that adopt in the current real work more.During work, the probe of stube cable is dropped in the well slowly, when probe the two poles of the earth form closed circuit when touching ground water level, chart display provides signal simultaneously, measures the depth of burial that cable length in the well is underground water table this moment.
Electric fluviograph operation inconvenience, precision is not high, and energy measurement does not bury very dark underground water table; Sometimes when electrode contact contact cast iron well tubular wall or the cement well casing place's closing of circuit that leaks, cause mistake to survey; At the unsteady flow pumping test initial stage, because the interval (in 1min, 2min) of the measurement water level time of regulation is very short, often cause operation untimely, be difficult to survey accurate.
The purpose of this utility model then is the problem at above-mentioned existence, has designed a kind of sensor and has provided the water level signal, is amplified by amplifier, then the digital water level meter that shows with the liquid crystal gauge outfit.
The utility model technical solution:
A kind of digital water level meter, it comprises surveys water-level probe and display composition, it is characterized in that 1 pin of MPX2100 sensor, 3 pin meet amplifier A
1The output source of stable pressure, 2 pin, 4 pin respectively with double differential amplifier A
2, A
3Positive pole joins, A
2, A
3Output termination 3.5 liquid crystal gauge outfits, wherein 1 place, pressurized hole of MPX2100 sensor is connected to U type pipe 2, and U type pipe 2 has micropore being positioned at the probing shell place.
The utility model advantage:
Digital water level meter advanced technology, easy to carry, simple to operate, measure reliably, and can survey the underground water table of any buried depth.The water level, digital water Cui meter also is applicable to the liquid level of measuring surface water body water level, pond water tower level and various non-tight fluid reservoirs, and is of many uses under geodetic.
Fig. 1 is the utility model electrical schematic diagram.
Fig. 2 is the utility model sonde configuration synoptic diagram.
Below in conjunction with accompanying drawing the utility model is further described:
In the digital water level meter electrical schematic diagram, amplifier A
1For MPX2100 sensor and 3.5 liquid crystal gauge outfits provide 5V constant voltage source.This inner constant voltage source allows circuit at 7-30V
DCWork does not have the loss of additive error in the scope, and when this inner constant pressure source is adjusted to 5V voltage, circuit will obtain the electric current of about 4mA.Therefore this circuit provides life-span more than 100 hours to general 9V alkaline battery.
The underground water table signal that the MPX2100 sensor provides is by A
2, A
3The double differential amplifier of forming amplifies, and the water level signal after the amplification directly shows the water level value of surveying, reading accuracy 1cm H in 3.5 liquid crystal gauge outfits (3.5 digital lcd drivers that ICL7106 forms and A/D converter and control circuit are formed)
2O satisfies hydrogeological job requirement.
Potentiometer W
1Provide output at zero point to regulate potentiometer W
2Adjust enlargement factor, MPX2100 sensor input pressure 100KP during adjustment
a, adjust W
2Make gauge outfit show 10.00mH
2O.
The MPX2100 sensor is the device that utilizes the piezoresistive effect making of monocrystalline silicon, and by the Wheatstone bridge of being made up of 4 equivalent sheet resistances, the electric bridge out of trim has voltage output under pressure on silicon chip, and bridge output voltage is directly proportional with pressure.
The MPX2100 sensor is sealed in the cylindric Stainless Steel Shell, constitutes the probe of measuring underground water table.Probe diameter 22mm, long 150mm, heavily about 200g.Sensor terminals is drawn with 4 cores ventilations cable, and 1 place, pressurized hole of sensor is connected to U type pipe 2, is full of oil in the U type pipe 2, and U type pipe 2 has micropore being positioned at the probing shell place, to transmit water column pressure.Probe is embedded in the following some degree of depth of the water surface during work, and it bears the water column pressure of this degree of depth.When the water surface rises or descend, the corresponding increase of water column pressure that probe bears or reduce, water surface fluctuation, the digital water level meter shows conversion automatically, be the boundary with hydrostatic level (water level when probe is imbedded in the water), water level rise show on the occasion of, the demonstration negative value descends.
When bailing test is surveyed hydrostatic level, probe is connected water level gauge, to be shown stable after, transfer W1 to make and be shown as zero, then probe is dropped in the well slowly a little less than reading at once behind the ground water level, cable length L deducts displayed value and is hydrostatic level buried depth H in this moment well.
After hydrostatic level is measured, continue to transfer and pop one's head in to some degree of depth below the ground water level (promptly greater than the bailing test dynamic water level maximum estimated range of decrease, but disposable throwing down must not be greater than 10m).Behind the approximate number minute, when probe is consistent with the water environment temperature, (shows and stablize), transfer W1 to make again to be shown as zero.After bailing test began, " one " value that water level gauge shows was exactly the dynamic water level range of decrease.When the dynamic water level range of decrease during, transfer probe again, and repeat the aforesaid operations process near 10m.After this, the dynamic water level range of decrease is the dynamic water level range of decrease addition of throwing down the instrument displayed value and the second time when popping one's head in the well.The rest may be inferred by analogy.
Claims (2)
1. digital water level meter, it comprises surveys water-level probe and display is formed, and it is characterized in that 1 pin of MPX2100 sensor, 3 pin meet amplifier A
1The output source of stable pressure, 2 pin, 4 pin respectively with double differential amplifier A
2, A
3Positive pole joins, A
2, A
3Output termination 3.5 liquid crystal gauge outfits, wherein U type pipe (2) is located to be connected in the pressurized hole (1) of MPX2100 sensor, and U type pipe (2) has micropore being positioned at the probing shell place.
2. digital water level meter according to claim 1 is characterized in that being full of oil in the U type pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240966 CN2261620Y (en) | 1995-11-29 | 1995-11-29 | Digital water level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240966 CN2261620Y (en) | 1995-11-29 | 1995-11-29 | Digital water level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2261620Y true CN2261620Y (en) | 1997-09-03 |
Family
ID=33882449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95240966 Expired - Fee Related CN2261620Y (en) | 1995-11-29 | 1995-11-29 | Digital water level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2261620Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388920A (en) * | 2015-12-17 | 2016-03-09 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier based on voltage-stabilization-type rectifier and filter circuit |
| CN105425841A (en) * | 2015-12-17 | 2016-03-23 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier based on rectifier filter circuit |
| CN105423473A (en) * | 2015-12-17 | 2016-03-23 | 成都悦翔翔科技有限公司 | Automatic water addition control system for humidifier on basis of voltage stabilization type differential amplification circuit |
| CN105425840A (en) * | 2015-12-17 | 2016-03-23 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier |
| CN105527984A (en) * | 2015-12-17 | 2016-04-27 | 成都悦翔翔科技有限公司 | Automatic water adding control system based on differential amplifier circuit for humidifier |
| CN105546721A (en) * | 2015-12-17 | 2016-05-04 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier based on rectifier type differential amplification circuit |
-
1995
- 1995-11-29 CN CN 95240966 patent/CN2261620Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388920A (en) * | 2015-12-17 | 2016-03-09 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier based on voltage-stabilization-type rectifier and filter circuit |
| CN105425841A (en) * | 2015-12-17 | 2016-03-23 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier based on rectifier filter circuit |
| CN105423473A (en) * | 2015-12-17 | 2016-03-23 | 成都悦翔翔科技有限公司 | Automatic water addition control system for humidifier on basis of voltage stabilization type differential amplification circuit |
| CN105425840A (en) * | 2015-12-17 | 2016-03-23 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier |
| CN105527984A (en) * | 2015-12-17 | 2016-04-27 | 成都悦翔翔科技有限公司 | Automatic water adding control system based on differential amplifier circuit for humidifier |
| CN105546721A (en) * | 2015-12-17 | 2016-05-04 | 成都悦翔翔科技有限公司 | Automatic water adding control system for humidifier based on rectifier type differential amplification circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |