CN202533145U - Liquid level alarm circuit - Google Patents
Liquid level alarm circuit Download PDFInfo
- Publication number
- CN202533145U CN202533145U CN2012200830954U CN201220083095U CN202533145U CN 202533145 U CN202533145 U CN 202533145U CN 2012200830954 U CN2012200830954 U CN 2012200830954U CN 201220083095 U CN201220083095 U CN 201220083095U CN 202533145 U CN202533145 U CN 202533145U
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- China
- Prior art keywords
- liquid level
- circuit
- alarm circuit
- level alarm
- temperature sensor
- 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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Abstract
The utility model discloses a liquid level alarm circuit. The liquid level alarm circuit comprises two AD590 integrated temperature sensors B1 and B2, an amplifier, an alarm circuit and a plurality of resistors. The integrated temperature sensor B1 of the liquid level alarm circuit is arranged at an alerting liquid level while the other integrated temperature sensor B2 is arranged in an outer circuit; the output of the amplifier is zero normally when the two temperature sensors are at the same temperature; and when the liquid level rises, the temperature sensor B2 is submerged by the liquid; and therefore, the amplifier outputs a control signal to drive the alarm circuit to send an alarm as the temperature of the liquid is different from the environmental temperature. The liquid level alarm circuit, disclosed by the utility model, has the advantages of a simple structure, rational design and high sensitivity, and can be applied to various occasions.
Description
Technical field
The utility model belongs to the electronic alarm circuit field, is specifically related to a kind of liquid level alarm circuit.
Background technology
The liquid level warning technology is widely used in water treatment, chemical industry, household electrical appliance, machinery and equipment and electron trade, and existing liquid level alarm is floating type control model mostly, and there are problems such as sensitivity is low, execute-in-place difficulty in this control model; Also have some liquid level alarms of forming by electronic circuit, though sensitivity increase, complicated circuit, maintenance and debugging is difficult, has brought inconvenience to productive life.
The utility model content
The utility model purpose: the purpose of the utility model is in order to solve the deficiency of prior art, a kind of liquid level alarm circuit to be provided.
Technical scheme: the described a kind of liquid level alarm circuit of the utility model comprises two AD590 integrated temperature sensors, amplifier; Warning circuit and some resistance, B1 of described two integrated temperature sensors of the utility model are arranged on warning liquid level place, and another B2 is arranged in the circuit external; Following two temperature sensors of normal condition are under identical temperature, and amplifier is output as zero, when liquid level raises; Temperature sensor B1 will be flooded by liquid; Because fluid temperature is different with environment temperature, amplifier output control signal drives warning circuit and reports to the police.
The phonation circuit that said warning circuit is made up of loudspeaker and triode.
Said circuit adopts the 6V DC-voltage supply.
Beneficial effect: the utility model is simple in structure, and is reasonable in design, highly sensitive, can be applied to various occasions.
Description of drawings
Accompanying drawing is the utility model circuit structure diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in accompanying drawing, a kind of liquid level alarm circuit comprises two AD590 integrated temperature sensor B1 and B2; Operational amplifier IC741; Warning circuit and some resistance, wherein sensor B1 is arranged on warning liquid level place, and sensor B2 is arranged in the circuit external; The phonation circuit that warning circuit is made up of loudspeaker and triode, entire circuit adopts the 6V DC-voltage supply.
The principle of work of the utility model is: two sensors are regulated RP1 and are made operational amplifier IC be output as zero under identical temperature conditions at ordinary times; When liquid level raise, sensor B1 will be flooded by liquid, because fluid temperature is different with environment temperature, operational amplifier IC exports control signal, drove warning circuit and reported to the police.
Claims (3)
1. liquid level alarm circuit; It is characterized in that: circuit comprises two AD590 integrated temperature sensor B1 and B2, amplifier, warning circuit and resistance; Said amplifier input terminal is connected with B2 with integrated temperature sensor B1 respectively; The output terminal of amplifier is connected with warning circuit, and said integrated temperature sensor B1 is arranged on warning liquid level place, and integrated temperature sensor B2 is arranged in the circuit external.
2. a kind of liquid level alarm circuit according to claim 1 is characterized in that: the phonation circuit that said warning circuit is made up of loudspeaker and triode.
3. a kind of liquid level alarm circuit according to claim 1 is characterized in that: said circuit adopts the 6V DC-voltage supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200830954U CN202533145U (en) | 2012-03-08 | 2012-03-08 | Liquid level alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200830954U CN202533145U (en) | 2012-03-08 | 2012-03-08 | Liquid level alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533145U true CN202533145U (en) | 2012-11-14 |
Family
ID=47134323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200830954U Expired - Fee Related CN202533145U (en) | 2012-03-08 | 2012-03-08 | Liquid level alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533145U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864571A (en) * | 2015-05-29 | 2015-08-26 | 珠海格力电器股份有限公司 | Air conditioning system, liquid level detection device and method, water pumping equipment and method |
| CN108216030A (en) * | 2018-01-31 | 2018-06-29 | 重庆鸿净环保科技开发有限公司 | A kind of motor vehicle waste oil recycles transport monitor system |
-
2012
- 2012-03-08 CN CN2012200830954U patent/CN202533145U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864571A (en) * | 2015-05-29 | 2015-08-26 | 珠海格力电器股份有限公司 | Air conditioning system, liquid level detection device and method, water pumping equipment and method |
| CN104864571B (en) * | 2015-05-29 | 2017-07-07 | 珠海格力电器股份有限公司 | Air conditioning system, liquid level detection device and method, water pumping equipment and method |
| CN108216030A (en) * | 2018-01-31 | 2018-06-29 | 重庆鸿净环保科技开发有限公司 | A kind of motor vehicle waste oil recycles transport monitor system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130308 |