CN201497543U - Capacitance induction type water temperature and level sensor - Google Patents
Capacitance induction type water temperature and level sensor Download PDFInfo
- Publication number
- CN201497543U CN201497543U CN2009201204176U CN200920120417U CN201497543U CN 201497543 U CN201497543 U CN 201497543U CN 2009201204176 U CN2009201204176 U CN 2009201204176U CN 200920120417 U CN200920120417 U CN 200920120417U CN 201497543 U CN201497543 U CN 201497543U
- Authority
- CN
- China
- Prior art keywords
- temperature
- water
- level sensor
- induction type
- type water
- 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
Links
Images
Abstract
The utility model relates to a capacitance induction type water temperature and level sensor, which is characterized in that an induction electrode and a temperature sensor are fixed on an integral support together, a high-temperature-resistant conducting wire is connected to a circuit on a circuit board through a guide groove on the support, a high-temperature-resistant insulation coat coats a combined body, the insulation coat and the combined body are sealed by aid of high-temperature-resistant silicon, and the circuit board is arranged on a fixed position. The capacitance induction type water temperature and level sensor is simple in structure, and capacity generated by the induction electrode and a common ground terminal can eliminate influence of polarity to measuring results, thereby leading the measuring results to be reliable. The capacitance induction type water temperature and level sensor can reduce sensibility of water quality and water scale to the measuring results.
Description
Technical field
The utility model relates to a kind of capacitor induction type sensor, adopts overhead to install, and is the device that solar water heater is measured water-level and water-temperature.
Background technology
Ultimate principle: the sensor environment for use is a domestic water, contains a certain amount of negative ions in the domestic water, under the alive outside driving of the negative ions in the water, possesses certain conductive capability, forms an equivalent resistance.This sensor is made up of a plurality of level electrodes and a public electrode, and level electrode is designated as 1 level electrode respectively, 2 level electrodes, 3 level electrodes, 4 level electrodes ..., wherein 1 level electrode is below.When water was expired to 1 level electrode place, public electrode and 1 level electrode were under water simultaneously, and equivalent resistance changes between the two.In like manner, when water full during to other water level utmost points, between equivalent water level electrode and the public electrode etc. resistance be changed.By certain circuit, the equivalent resistance that detects between each level electrode and the public electrode changes, thereby detects the equivalent water level state.
Public electrode is below, and the series connection resistance of connecting respectively is designated as R10, R20, R30, R40 between adjacent level electrode.The whole equivalent resistance of sensor is R10+R20+R30+R40 when anhydrous, gives master controller by capacitance-resistance vibration (RC vibration) output certain frequency.When water is full during to 1 water level, type becomes an equivalent resistance R1 in parallel with R10 between 1 level electrode and public electrode, and this moment, the whole constant resistance of sensor was: (R10 and R1)+R20+R30+R40, thus change capacitance-resistance (RC vibration) output frequency that vibrates.In like manner, when water was expired to other affair water levels, the equivalent resistance of sensor integral body was changed.Can find that by detailed calculated this kind detection mode changes the whole equivalent resistance of sensor, but the change amount is distant.Therefore, sensor water quality, incrustation scale disturbs the water level test result easily.
Summary of the invention
The purpose of this utility model is for a kind of capacitor induction type water-temperature water-level sensor is provided.
For realizing the purpose of this utility model, this adopts following technical scheme:
The capacitor induction type water-temperature water-level sensor, it is that induction electrode and temperature sensor are fixed on above the integral support together, by high temperature resistant wire, through the guide groove above the support, is connected to the circuit of circuit board top; The high-temperature insulation overcoat with top assembly parcel, uses high temperature resistant silica gel with insulating coating and assembly sealing at last; Circuit board is installed to the fixed position, at a sealant pouring and sealing.At last sensor top waterproof lid is tightened.
The circuit working principle:
The PIN0 pin of chip U1 is connected to capacitor C 1, then ground connection by R1; Between C1 and R1, draw induction electrode, be positioned in the water respectively, with C1, R1 is connected to the operational amplifier positive input, operational amplifier negative input input fixed voltage V0, operational amplifier output terminal is connected to COUNT0, chip U1 produces an AC charging electric current by the PIN0 pin, charge to C1 by R1, when in the water tank anhydrous the time, COUNT0 exports a fixed value, when water arrives induction electrode, quite there is an inductance capacitance C0, the value of COUNT0 output is changed, can judge the variation of water level by the change of this value.The variation of four COUNT values is delivered to MCU and is obtained water level signal, and the temperature value that thermistor 2 records is delivered to and obtained temperature value after MCU handles, and MCU passes to main frame by communications protocol with this value with the water-temperature water-level signal that obtains, and finishes the collection of water-temperature water-level.
The utility model is simple in structure, and the generation electric capacity of induction electrode and common ground end can be eliminated the influence of polarization to measurement result, and measurement result is followed reliably.Can reduce water quality, incrustation scale is to the susceptibility of measurement result.
Description of drawings
Fig. 1 is the structural representation that the utility model is loaded on complete machine.
Fig. 2 is circuit theory diagrams of the present utility model
Embodiment
The purpose of this utility model, feature and advantage will be in conjunction with the embodiments, are further described with reference to accompanying drawing.To help to understand the utility model by embodiment, but not limit content of the present utility model.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.
The capacitor induction type water-temperature water-level sensor, design feature: this sensor construction is integrated, induction electrode 5,6,7,8, temperature sensor 2 is fixed on above the integral support 4 together, by high temperature resistant wire 1, the guide groove through above the support 4 is connected to above the circuit board 9; High-temperature insulation overcoat 3 with top assembly parcel, uses high temperature resistant silica gel with insulating coating 3 and assembly sealing at last; Circuit board 9 is installed to the fixed position, at a sealant pouring and sealing.At last sensor top waterproof lid is tightened.
The circuit working principle:
The PIN0 pin of chip U1 is connected to capacitor C 1, then ground connection by R1; Between C1 and R1, draw induction electrode, be positioned in the water respectively, with C1, R1 is connected to the operational amplifier positive input, operational amplifier negative input input fixed voltage V0, operational amplifier output terminal is connected to COUNT0, chip U1 produces an AC charging electric current by the PIN0 pin, charge to C1 by R1, when in the water tank anhydrous the time, COUNT0 exports a fixed value, when water arrives induction electrode, quite there is an inductance capacitance C0, the value of COUNT0 output is changed, can judge the variation of water level by the change of this value.The variation of four COUNT values is delivered to MCU and is obtained water level signal, and the temperature value that thermistor 2 records is delivered to and obtained temperature value after MCU handles, and MCU passes to main frame by communications protocol with this value with the water-temperature water-level signal that obtains, and finishes the collection of water-temperature water-level.
Claims (2)
1. capacitor induction type water-temperature water-level sensor, it is characterized in that: it is that induction electrode and temperature sensor are fixed on above the integral support together, by high temperature resistant wire, through the guide groove above the support, is connected to the circuit of circuit board top; The high-temperature insulation overcoat with top assembly parcel, uses high temperature resistant silica gel with insulating coating and assembly sealing at last; Circuit board is installed to the fixed position.
2. capacitor induction type water-temperature water-level sensor according to claim 1 is characterized in that: circuit is that the PIN0 pin of chip U1 passes through R1, is connected to capacitor C 1, then ground connection; Between C1 and R1, draw induction electrode, be positioned in the water respectively, with C1, R1 is connected to the operational amplifier positive input, the defeated fixed voltage V0 of operational amplifier negative input, operational amplifier output terminal is connected to COUNT0, the temperature value that thermistor 2 records, deliver to and obtain temperature value after MCU handles, MCU connects main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201204176U CN201497543U (en) | 2009-05-21 | 2009-05-21 | Capacitance induction type water temperature and level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201204176U CN201497543U (en) | 2009-05-21 | 2009-05-21 | Capacitance induction type water temperature and level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201497543U true CN201497543U (en) | 2010-06-02 |
Family
ID=42440747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201204176U Expired - Fee Related CN201497543U (en) | 2009-05-21 | 2009-05-21 | Capacitance induction type water temperature and level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201497543U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305654A (en) * | 2011-07-29 | 2012-01-04 | 山东桑乐太阳能有限公司 | Sensor capable of measuring water level by using temperature sensors and using method thereof |
| WO2012048467A1 (en) * | 2010-10-15 | 2012-04-19 | 惠州市卓耐普智能技术有限公司 | Water temperature and level sensor of contactless electric field induction type |
| CN102778266A (en) * | 2012-07-02 | 2012-11-14 | 太原理工大学 | Water level redundancy measuring device |
| CN102901544A (en) * | 2012-10-19 | 2013-01-30 | 上海凡宜科技电子有限公司 | Material position and temperature sensor |
| CN103398754A (en) * | 2013-07-12 | 2013-11-20 | 广东卓耐普智能技术股份有限公司 | Three-in-one sensor |
| RU2521752C1 (en) * | 2013-02-11 | 2014-07-10 | ООО предприятие "КОНТАКТ-1" | Product temperature and level measuring device |
| EP2755002A1 (en) * | 2013-01-15 | 2014-07-16 | Electrolux Home Products Corporation N.V. | A level measurement system for conductive liquids |
| CN105277255A (en) * | 2015-11-19 | 2016-01-27 | 钱和革 | Capacitive testing circuit, liquid level detecting circuit, use method thereof, cup and equipment |
-
2009
- 2009-05-21 CN CN2009201204176U patent/CN201497543U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012048467A1 (en) * | 2010-10-15 | 2012-04-19 | 惠州市卓耐普智能技术有限公司 | Water temperature and level sensor of contactless electric field induction type |
| CN102713535A (en) * | 2010-10-15 | 2012-10-03 | 惠州市卓耐普智能技术有限公司 | Water temperature and level sensor of contactless electric field induction type |
| CN102305654A (en) * | 2011-07-29 | 2012-01-04 | 山东桑乐太阳能有限公司 | Sensor capable of measuring water level by using temperature sensors and using method thereof |
| CN102778266B (en) * | 2012-07-02 | 2013-12-11 | 太原理工大学 | Water level redundancy measuring device |
| CN102778266A (en) * | 2012-07-02 | 2012-11-14 | 太原理工大学 | Water level redundancy measuring device |
| CN102901544A (en) * | 2012-10-19 | 2013-01-30 | 上海凡宜科技电子有限公司 | Material position and temperature sensor |
| CN102901544B (en) * | 2012-10-19 | 2015-01-21 | 上海凡宜科技电子有限公司 | Material position and temperature sensor |
| EP2755002A1 (en) * | 2013-01-15 | 2014-07-16 | Electrolux Home Products Corporation N.V. | A level measurement system for conductive liquids |
| WO2014111369A1 (en) * | 2013-01-15 | 2014-07-24 | Electrolux Home Products Corporation N. V. | A level measurement system for conductive liquids |
| AU2014206929B2 (en) * | 2013-01-15 | 2017-07-06 | Electrolux Home Products Corporation N. V. | A level measurement system for conductive liquids |
| US9846069B2 (en) | 2013-01-15 | 2017-12-19 | Electrolux Home Products Corporation N.V. | Level measurement system for conductive liquids |
| RU2521752C1 (en) * | 2013-02-11 | 2014-07-10 | ООО предприятие "КОНТАКТ-1" | Product temperature and level measuring device |
| CN103398754A (en) * | 2013-07-12 | 2013-11-20 | 广东卓耐普智能技术股份有限公司 | Three-in-one sensor |
| CN103398754B (en) * | 2013-07-12 | 2016-01-20 | 广东卓耐普智能股份有限公司 | Three-in-one sensor |
| CN105277255A (en) * | 2015-11-19 | 2016-01-27 | 钱和革 | Capacitive testing circuit, liquid level detecting circuit, use method thereof, cup and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201497543U (en) | Capacitance induction type water temperature and level sensor | |
| Balsamo et al. | A new non-invasive voltage measurement method for wireless analysis of electrical parameters and power quality | |
| CN206132554U (en) | Integrated transducer | |
| CN101672681A (en) | Water level measurement device, water level measurement method and water level correction method | |
| CN203587701U (en) | Online detection circuit for photovoltaic inverter ground insulation resistance | |
| CN208568958U (en) | A kind of temperature of electric transmission line detection system | |
| CN104965125B (en) | A kind of measuring system of cable accessory insulator interface electrical conductivity | |
| CN101957403B (en) | Non-contact conductometry measuring device stimulated by quartz crystal oscillator and method | |
| CN204241574U (en) | A kind of power capacitor on-line measurement device | |
| CN201152767Y (en) | Non-contact capacitor induction water level sensor | |
| CN201289396Y (en) | Apparatus for measuring water temperature and water level of solar water heater | |
| CN101776334A (en) | Water-level and water-temperature sensor for solar water heater | |
| CN205594111U (en) | Leakage detection appearance based on rogowski coil | |
| CN207424104U (en) | Vibration amplifier sensor capacitance amount detecting device | |
| CN212275029U (en) | Novel networked capacitive wave height measuring device | |
| CN202362444U (en) | An electronic type current transformer temperature test box | |
| CN201255648Y (en) | Liquid level detecting device | |
| CN102192951A (en) | Ion concentration measuring circuit and ion current sensor | |
| CN201852615U (en) | Alternating current electrolytic liquid level sensor | |
| CN204514996U (en) | Alternating current testing circuit | |
| CN201096545Y (en) | Solar water heater temperature- liquid level sensor | |
| CN201396976Y (en) | Double-bar resistance-type solar water temperature water level sensor | |
| CN204269152U (en) | A kind of ice slush sensor construction | |
| CN203310921U (en) | Vacuum circuit breaker shield capacitance detection device | |
| CN109186713A (en) | Capacitance sensor and liquid level detection system |
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: 20100602 Termination date: 20130521 |