CN201662422U - Infrared pulse electronic liquid level meter - Google Patents
Infrared pulse electronic liquid level meter Download PDFInfo
- Publication number
- CN201662422U CN201662422U CN2009202536910U CN200920253691U CN201662422U CN 201662422 U CN201662422 U CN 201662422U CN 2009202536910 U CN2009202536910 U CN 2009202536910U CN 200920253691 U CN200920253691 U CN 200920253691U CN 201662422 U CN201662422 U CN 201662422U
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- Prior art keywords
- infrared
- circuit
- liquid level
- resistance
- pin
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- 239000007788 liquid Substances 0.000 title claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to an infrared pulse electronic liquid level meter, which belongs to the technical field of electronic detection. The infrared pulse electronic liquid level meter consists of a liquid level lower limit infrared sensor, a liquid level upper limit infrared sensor and a warning device, wherein the liquid level lower limit infrared sensor and the liquid level upper limit infrared sensor respectively comprise an infrared ray emitting circuit and an infrared ray receiving circuit, the warning circuit respectively consists of a voltage comparator 1, a voltage comparator 2, an NE5551 pulse generation circuit, an NE5552 pulse generation circuit and a warning indicating circuit. When the liquid level is lower than the lower limit liquid level or is higher than the upper limit liquid level, light emitting diodes LED1 and LED2 flicker for realizing the warning effect.
Description
Technical field
The utility model relates to a kind of infrared pulse electronic level meter, belongs to the electric detective technology field.
Background technology
Existing liquid level gauge mainly contains ultrasonic level gage, radar level gauge etc., and these liquid level gauge precision are higher, but cost an arm and a leg, and are not suitable for widespread usage; Though traditional floating ball lever meter low price, volume is bigger, is not suitable for the less situation of liquid, even if can equal proportion dwindle, but the surface tension of dwindling back liquid just significantly strengthens, and the sensitivity of liquid level gauge just reduces greatly, does not satisfy actual needs.
Summary of the invention
The utility model purpose is to overcome the deficiency of prior art, and a kind of low price, volume is less, sensitivity is higher a kind of infrared pulse electronic level meter are provided.
The utility model is finished by the following technical programs: a kind of infrared pulse electronic level meter, form by liquid level lower limit infrared sensor, liquid level upper limit infrared sensor and alarm; Liquid level lower limit infrared sensor comprises Infrared radiating circuit and Infrared receiving circuit, and the Infrared radiating circuit is to receive the Infrared emitting diode from positive source through master switch, and the serial connection divider resistance is connected to power cathode; The Infrared receiving circuit is to receive the Infrared reception diode from positive source through master switch, and the serial connection divider resistance is connected to power cathode; Liquid level upper limit infrared sensor comprises Infrared radiating circuit and Infrared receiving circuit, and the Infrared radiating circuit is to receive divider resistance from positive source through master switch, and serial connection Infrared emitting diode is connected to power cathode; The Infrared receiving circuit is to receive divider resistance from positive source through master switch, and serial connection Infrared reception diode is connected to power cathode; Warning circuit is by voltage comparator, NE555 produces pulsing circuit, the warning indicating circuit is formed, the inverting input of voltage comparator is received the centre that reference voltage provides two divider resistances of circuit, in-phase input end is received the centre of Infrared receiving circuit divider resistance and Infrared reception reception diode, 4 of NE555,8 pin are all received power supply, under power supply, be connected in series two resistance continuously, be connected in series an electric capacity again to power cathode, 7 pin are received between two resistance of continuous serial connection, 2,6 pin are received the hot end of electric capacity, 5 pin connect an electric capacity to power cathode, 3 pin connect a resistance, under resistance, be connected in series a light emitting diode again, the negative pole of light emitting diode is received the output terminal of voltage comparator, and 1 pin is directly received power cathode.
Principle of work of the present utility model:
When liquid level is lower than bottom limit level, the light that the Infrared reception diode receives infrared-emitting diode increases, make resistance value reduce, the current potential of voltage comparator inverting input raises, make the current potential of inverting input be higher than the current potential of in-phase input end, voltage comparator output terminal output low level, light emitting diode sends scintillation light under the pulse voltage of NE555 output; When liquid level is higher than bottom limit level, the light of the Infrared emitting diode that the Infrared reception diode receives reduces, make resistance value increase, the current potential of voltage comparator inverting input reduces, make the current potential of inverting input be lower than the current potential of in-phase input end, voltage comparator output terminal output high level, light emitting diode is in cut-off state, does not work.When liquid level is higher than upper limit liquid level, the light that the Infrared reception diode receives the Infrared emitting diode reduces, make resistance value increase, the current potential of voltage comparator inverting input raises, make the current potential of inverting input be higher than the current potential of in-phase input end, voltage comparator output terminal output low level, light emitting diode sends scintillation light under the pulse voltage of NE555 output; When liquid level is lower than upper limit liquid level, the light that the Infrared reception diode receives the Infrared emitting diode increases, make the resistance value of Infrared reception diode reduce, the current potential of voltage comparator inverting input reduces, make the current potential of inverting input be lower than the current potential of in-phase input end, voltage comparator output terminal output high level, light emitting diode is in cut-off state, does not work.
The utility model compared with prior art has following advantage and effect:
(1) low price.The utility model is lower than prices such as existing ultrasonic level gage, radar level gauges.
(2) volume is less.The utility model volume is less, is suitable for many occasions.
(3) highly sensitive.Compared with traditional floating ball lever meter, when lacking the level gauging situation, it is very accurate that sensitivity of the present utility model just seems.
Description of drawings
Fig. 1 is a kind of infrared pulse electronic level meter theory diagram;
Fig. 2 is a kind of infrared pulse electronic level meter circuit theory diagrams.
Embodiment:
Below in conjunction with accompanying drawing to originally being that utility model is described further
A kind of infrared pulse electronic level meter is made up of liquid level lower limit infrared sensor, liquid level upper limit infrared sensor and alarm.Liquid level lower limit infrared sensor comprises Infrared radiating circuit and Infrared receiving circuit, and the Infrared radiating circuit is to receive Infrared emitting diode VD from power supply E positive pole through master switch K
1, serial connection divider resistance R
3, be connected to power cathode; The Infrared receiving circuit is to receive Infrared reception diode PD from power supply E positive pole through master switch K
1, serial connection divider resistance R
4, be connected to power cathode; Warning circuit is by voltage comparator
1, NE555
1Produce pulsing circuit, warning indicating circuit composition, voltage comparator
1Inverting input receive reference voltage and provide circuit two divider resistance R
1, R
2The centre, in-phase input end is received the Infrared reception diode PD of Infrared receiving circuit
1With divider resistance R
4The centre, NE555
14,8 pin all receive power supply VCC
2, under power supply, be connected in series two resistance R continuously
5, R
6, be connected in series a capacitor C again
1To power cathode, 7 pin are received two resistance R of continuous serial connection
5, R
6Between, 2,6 pin are received capacitor C
1Hot end, 5 pin connect a capacitor C
2To power cathode, 3 pin connect a resistance R
7, under resistance, be connected in series a LED again
1, the negative pole of light emitting diode is received voltage comparator
1Output terminal, 1 pin is directly received power cathode.Liquid level upper limit infrared sensor comprises Infrared radiating circuit and Infrared receiving circuit, and the Infrared radiating circuit is to receive divider resistance R from power supply E positive pole through master switch K
10, serial connection Infrared emitting diode VD
2, be connected to power cathode; The Infrared receiving circuit is to receive divider resistance R from power supply E positive pole through master switch K
11, serial connection Infrared reception diode PD
2, be connected to power cathode; Warning circuit is by voltage comparator
2, NE555
2Produce pulsing circuit, warning indicating circuit composition, voltage comparator
2Inverting input receive reference voltage and provide circuit two divider resistance R
8, R
9The centre, in-phase input end is received the divider resistance R of Infrared receiving circuit
11With Infrared reception diode PD
2The centre, NE555
24,8 pin all receive power supply VCC
4, under power supply, be connected in series two resistance R continuously
12, R
13, be connected in series a capacitor C again
3To power cathode, 7 pin are received two resistance R of continuous serial connection
12, R
13Between, 2,6 pin are received capacitor C
3Hot end, 5 pin connect a capacitor C
4To power cathode, 3 pin connect a resistance R
14, under resistance, be connected in series a LED again
2, the negative pole of light emitting diode is received voltage comparator
2Output terminal, 1 pin is directly received power cathode.
When liquid level is lower than bottom limit level, Infrared reception diode PD
1Receive infrared-emitting diode VD
1Light increase Infrared reception diode PD
1Resistance value reduce, cause the current potential of the end of oppisite phase of voltage comparator to raise voltage comparator output low level, LED
1Flicker realizes reporting to the police; When liquid level is higher than bottom limit level, Infrared reception diode PD
1Receive infrared-emitting diode VD
1Light reduce Infrared reception diode PD
1Resistance value increase, the current potential of the end of oppisite phase of voltage comparator reduces, voltage comparator output high level, LED
1Extinguish; When liquid level is higher than upper limit liquid level, Infrared reception diode PD
2Receive infrared-emitting diode VD
2Light reduce Infrared reception diode PD
2Resistance value increase, cause the current potential of the end of oppisite phase of voltage comparator to raise voltage comparator output low level, LED
2Flicker realizes reporting to the police; When liquid level was lower than upper limit liquid level, the Infrared reception diode met PD
2Receive infrared-emitting diode VD
2Light increase infrared photodiode PD
2Resistance value reduce, cause the current potential of the end of oppisite phase of voltage ratio machine to reduce, voltage comparator output high level, LED
2Extinguish.
Claims (1)
1. an infrared pulse electronic level meter is made up of liquid level lower limit infrared sensor, liquid level upper limit infrared sensor and alarm, it is characterized in that:
A, liquid level lower limit infrared sensor comprise Infrared radiating circuit and Infrared receiving circuit, and the Infrared radiating circuit is to receive Infrared emitting diode VD from power supply E positive pole through master switch K
1, serial connection divider resistance R
3, be connected to power cathode; The Infrared receiving circuit is to receive Infrared reception diode PD from power supply E positive pole through master switch K
1, serial connection divider resistance R
4, be connected to power cathode; Warning circuit is by voltage comparator (1), NE555
1Produce pulsing circuit, warning indicating circuit composition, the inverting input of voltage comparator (1) is received reference voltage provides circuit two divider resistance R
1, R
2The centre, in-phase input end is received the Infrared reception diode PD of Infrared receiving circuit
1With divider resistance R
4The centre, NE555
14,8 pin all receive power supply VCC
2, under power supply, be connected in series two resistance R continuously
5, R
6, be connected in series a capacitor C again
1To power cathode, 7 pin are received two resistance R of continuous serial connection
5, R
6Between, 2,6 pin are received capacitor C
1Hot end, 5 pin connect a capacitor C
2To power cathode, 3 pin connect a resistance R
7, under resistance, be connected in series a LED again
1, the negative pole of light emitting diode is received voltage comparator
1Output terminal, 1 pin is directly received power cathode;
B, liquid level upper limit infrared sensor comprise Infrared radiating circuit and Infrared receiving circuit, and the Infrared radiating circuit is to receive divider resistance R from power supply E positive pole through master switch K
10, serial connection Infrared emitting diode VD
2, be connected to power cathode; The Infrared receiving circuit is to receive divider resistance R from power supply E positive pole through master switch K
11, serial connection Infrared reception diode PD
2, be connected to power cathode; Warning circuit is by voltage comparator (2), NE555
2Produce pulsing circuit, warning indicating circuit composition, voltage comparator
2Inverting input receive reference voltage and provide circuit two divider resistance R
8, R
9The centre, in-phase input end is received Infrared receiving circuit divider resistance R
11Receive reception diode PD with Infrared
2The centre, NE555
24,8 pin all receive power supply VCC
4, under power supply, be connected in series two resistance R continuously
12, R
13, be connected in series a capacitor C again
3To power cathode, 7 pin are received two resistance R of continuous serial connection
12, R
13Between, 2,6 pin are received capacitor C
3Hot end, 5 pin connect a capacitor C
4To power cathode, 3 pin connect a resistance R
14, under resistance, be connected in series a LED again
2, the negative pole of light emitting diode is received the output terminal of voltage comparator (2), and 1 pin is directly received power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202536910U CN201662422U (en) | 2009-11-12 | 2009-11-12 | Infrared pulse electronic liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202536910U CN201662422U (en) | 2009-11-12 | 2009-11-12 | Infrared pulse electronic liquid level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201662422U true CN201662422U (en) | 2010-12-01 |
Family
ID=43232841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202536910U Expired - Fee Related CN201662422U (en) | 2009-11-12 | 2009-11-12 | Infrared pulse electronic liquid level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201662422U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764939A (en) * | 2019-01-24 | 2019-05-17 | 湖北科技学院 | A kind of liquid level detection device and warning device of the luxuriant and rich with fragrance pot of ink |
| CN109764937A (en) * | 2019-01-24 | 2019-05-17 | 湖北科技学院 | A kind of reflective biliquid level detecting apparatus and warning device for black luxuriant and rich with fragrance pot |
| CN115200670A (en) * | 2022-07-19 | 2022-10-18 | 北京奕润通科技有限公司 | Liquid level sensor for vehicle and liquid level detection method |
-
2009
- 2009-11-12 CN CN2009202536910U patent/CN201662422U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764939A (en) * | 2019-01-24 | 2019-05-17 | 湖北科技学院 | A kind of liquid level detection device and warning device of the luxuriant and rich with fragrance pot of ink |
| CN109764937A (en) * | 2019-01-24 | 2019-05-17 | 湖北科技学院 | A kind of reflective biliquid level detecting apparatus and warning device for black luxuriant and rich with fragrance pot |
| CN115200670A (en) * | 2022-07-19 | 2022-10-18 | 北京奕润通科技有限公司 | Liquid level sensor for vehicle and liquid level detection method |
| CN115200670B (en) * | 2022-07-19 | 2023-11-21 | 北京奕润通科技有限公司 | Liquid level sensor for vehicle and liquid level detection method |
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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: 20101201 Termination date: 20131112 |