CN111044116A - A capacitive liquid quantitative detection equipment - Google Patents
A capacitive liquid quantitative detection equipment Download PDFInfo
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- CN111044116A CN111044116A CN201911417631.2A CN201911417631A CN111044116A CN 111044116 A CN111044116 A CN 111044116A CN 201911417631 A CN201911417631 A CN 201911417631A CN 111044116 A CN111044116 A CN 111044116A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/00584—Control arrangements for automatic analysers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1002—Reagent dispensers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1004—Cleaning sample transfer devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N2035/00178—Special arrangements of analysers
- G01N2035/00237—Handling microquantities of analyte, e.g. microvalves, capillary networks
- G01N2035/00247—Microvalves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N2035/1025—Fluid level sensing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N2035/1027—General features of the devices
- G01N2035/1034—Transferring microquantities of liquid
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Abstract
本发明涉及微管检测技术领域，尤其涉及一种电容式液体定量检测设备，包括蠕动泵、多通电磁阀、定量环和微管液体检测器，所述的蠕动泵通过管路与微管液体检测器连接，待检测的微管固定在微管液体检测器上进行检测，所述的微管液体检测器与定量环连接，所述的定量环通过管路与多通电磁阀连接，所述的多通电磁阀的一侧连接有水样组件，多通电磁阀的另一侧连接有试剂组件，多通电磁阀的一个接口通过管路连接有检测模块；所述的检测模块用于检测。本专利的优点是通过该装置实现无接触、高精度、低成本、无浪费的效果。
The invention relates to the technical field of microtube detection, in particular to a capacitive liquid quantitative detection device, comprising a peristaltic pump, a multi-port solenoid valve, a quantitative loop and a microtube liquid detector. The detector is connected, the microtube to be detected is fixed on the microtube liquid detector for detection, the microtube liquid detector is connected with the quantitative loop, and the quantitative loop is connected with the multi-port solenoid valve through the pipeline, One side of the multi-port solenoid valve is connected with a water sample assembly, the other side of the multi-port solenoid valve is connected with a reagent assembly, and one interface of the multi-port solenoid valve is connected with a detection module through a pipeline; the detection module is used to detect . The advantage of this patent is that the device achieves the effects of no contact, high precision, low cost, and no waste.
Description
Technical Field
The invention relates to the technical field of microtube detection, in particular to capacitance type liquid quantitative detection equipment.
Background
In a measuring instrument, the liquid of a reaction often needs to be accurately quantified to ensure the accuracy of measurement, and the conventional quantitative ring technology usually adopts a photoelectric technology, a quantitative ring technology or a syringe pump technology.
The liquid level detection of the photoelectric technology is influenced by liquid color, pipe wall residue, pipe wall pollution and the like, the detection precision cannot meet the requirement, the judgment omission or the wrong judgment can be caused, the maintenance period is short, the maintenance cost and time are increased, and the detection on the semitransparent or capillary pipe cannot be carried out.
The traditional quantitative ring technology determines the quantitative amount of liquid through the volume between valves, the quantitative accuracy of the technology is high, but the liquid level condition needs to be judged by matching with other capacitance and photoelectric detection technologies or time, so that more reagents and a large amount of time are wasted in practical application.
The precision required for the processing and control of syringe pump technology is relatively high, resulting in relatively high manufacturing costs.
At present, no equipment which can realize low cost, no contact, long maintenance period and high precision exists in the solution of the quantitative problem of trace liquid.
Disclosure of Invention
The invention aims to solve the problems of the prior microtube detection and provides a microtube which has the advantages of low cost, no waste and no influence of color and impurities; the pipe wall is not contacted with contact liquid, so that the pipe wall residue or pipe wall pollution is avoided, and the maintenance period is long; the capacitance type liquid quantitative detection equipment is convenient to detect and high in detection precision.
For the purpose of the invention, the following technical scheme is adopted for realizing the purpose:
a capacitance type liquid quantitative detection device comprises a peristaltic pump, a multi-way electromagnetic valve, a quantitative ring and a micro-tube liquid detector, wherein the peristaltic pump is connected with the micro-tube liquid detector through a pipeline, a micro-tube to be detected is fixed on the micro-tube liquid detector for detection, the micro-tube liquid detector comprises a detection circuit board, a signal acquisition circuit, a power circuit, a single chip microcomputer circuit and a switching value output circuit, the single chip microcomputer circuit is connected with the signal acquisition circuit, the power circuit and the switching value output circuit, the signal acquisition circuit comprises an electrode plate and a resonance frequency circuit which are arranged on the detection circuit board, the micro-tube is attached to the electrode plate, the electrode plate is matched with the resonance frequency circuit, the liquid change in the micro-tube and the electrode plate form resonance frequency change, the resonance frequency change is acquired by the resonance frequency circuit and, the single chip microcomputer circuit processes signals to obtain liquid signals, the liquid signals are output by the switching value output circuit, the microtube liquid detector is connected with the quantitative ring, the quantitative ring is connected with the multi-way electromagnetic valve through a pipeline, one side of the multi-way electromagnetic valve is connected with the water sample assembly, the other side of the multi-way electromagnetic valve is connected with the reagent assembly, and one interface of the multi-way electromagnetic valve is connected with the detection module through a pipeline; the detection module is used for detecting.
Preferably, the detection module comprises a first electromagnetic valve, a digestion colorimetric pool and a second electromagnetic valve; the digestion colorimetric pool is connected between the first electromagnetic valve and the second electromagnetic valve.
Preferably, the water sample assembly comprises an offline water sample, a standard sample, pure water and an online water sample, and the offline water sample, the standard sample, the pure water and the online water sample are sequentially connected to the left side of the multi-way electromagnetic valve from top to bottom.
Preferably, the reagent assembly comprises a first reagent and a second reagent, and the first reagent and the second reagent are respectively connected to the right side of the multi-way electromagnetic valve.
Preferably, the bottom of the left side of the multi-way electromagnetic valve is connected with cleaning waste liquid through a pipeline.
Preferably, the bottom of the right side of the multi-way electromagnetic valve is connected with reaction waste liquid through a pipeline.
Preferably, the signal acquisition circuit comprises three electrode plates, and the three electrode plates are positioned on the same straight line.
Preferably, the microtubule liquid detector further comprises a reset circuit, and the reset circuit is connected to the reset end of the singlechip circuit to provide a reset signal.
Preferably, the microtube liquid detector further comprises a watchdog circuit and an LED display circuit.
Preferably, the microtube liquid detector further comprises an RS485 output circuit.
By adopting the technical scheme, the capacitance type liquid quantitative detection equipment does not need to be in contact with liquid, so that the equipment is not influenced by colors and impurities, the pipe wall is not polluted, and the detection precision is further improved while the cleaning and maintenance are not needed; high precision is achieved by the detector and low cost is also achieved; meanwhile, waste caused by detection through a large amount of reagents like a quantitative ring is not needed, and the effects of no waste and high-efficiency detection are achieved.
To sum up, the advantage of this patent is through the effect that the device realized contactless, high accuracy, low cost, no waste.
Drawings
Fig. 1 is a system block diagram of a capacitance type liquid quantitative detection device of the present invention.
FIG. 2 is a system block diagram of a microtube liquid detector.
Fig. 3 is a circuit diagram of a power supply circuit.
Fig. 4 is a circuit diagram of a single chip microcomputer circuit.
Fig. 5 is a circuit diagram of a signal acquisition circuit.
Fig. 6 is a circuit diagram of the switching value output circuit.
Fig. 7 is a circuit diagram of a watchdog circuit.
Fig. 8 is a circuit diagram of an RS485 output circuit.
Detailed Description
The following describes a detailed embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, a capacitance type liquid quantitative detection device comprises a peristaltic pump 101, a multi-way solenoid valve 102, a quantitative ring 103 and a micro-tube liquid detector, wherein the peristaltic pump 101 is connected with the micro-tube liquid detector through a pipeline, and is used for pumping and returning through the peristaltic pump 101. The microtubule liquid detector is connected with a quantitative ring 103, the quantitative ring 103 is connected with a multi-way electromagnetic valve 102 through a pipeline, one side of the multi-way electromagnetic valve 102 is connected with a water sample assembly, the water sample assembly comprises an offline water sample, a standard sample, pure water and an online water sample, and the offline water sample, the standard sample, the pure water and the online water sample are sequentially connected on the left side of the multi-way electromagnetic valve 102 from top to bottom. The bottom of the left side of the multi-way electromagnetic valve 102 is connected with cleaning waste liquid through a pipeline, so that the waste liquid is convenient to clean, and the reaction precision is improved. The other side of the multi-way solenoid valve 102 is connected to a reagent assembly, which includes a first reagent and a second reagent, and the first reagent and the second reagent are respectively connected to the right side of the multi-way solenoid valve 102. The bottom of the right side of the multi-way electromagnetic valve 102 is connected with reaction waste liquid through a pipeline, so that the reaction waste liquid is convenient to discharge.
One interface of the multi-way electromagnetic valve 102 is connected with a detection module 104 through a pipeline; the detection module 104 is used for detecting, and the detection module 104 comprises a first solenoid valve 1041, a digestion colorimetric pool 1042 and a second solenoid valve 1043; the digestion colorimetric pool 1042 is connected between the first electromagnetic valve 1041 and the second electromagnetic valve 1043, one end of the second electromagnetic valve 1043 is connected with air, and color comparison is carried out through the digestion colorimetric pool 105, so that further detection and comparison are carried out.
During operation, reagent that will detect is extracted through the microtubule liquid detector through peristaltic pump 101 corotation, carries out the capacitance detection to the liquid that passes through the electrode slice on the microtubule liquid detector, thereby judges the state of liquid in the pipeline to confirm the position of liquid in the pipeline through the slope of infusion speed and capacitance change, confirm to detect accurate back, send liquid back to through peristaltic pump 101 reversal, thereby carry out the reaction of reagent and water sample.
As shown in fig. 2, the microtubule liquid detector comprises a detection circuit board 1, a signal acquisition circuit 2, a power supply circuit 3, a single chip microcomputer circuit 4 and a switching value output circuit 5, wherein the single chip microcomputer circuit 4 is connected with the signal acquisition circuit 2, the power supply circuit 3 and the switching value output circuit 5. The signal acquisition circuit 2 comprises an electrode plate and a resonant frequency circuit which are arranged on the detection circuit board 1, the micro-tube is attached to the electrode plate, the electrode plate is matched with the resonant frequency circuit, the signal acquisition circuit 2 comprises three electrode plates, and the three electrode plates are positioned on the same straight line. The liquid change in the micro-tube and the electrode plate form resonance frequency change, the resonance frequency change is collected by the resonance frequency circuit and transmitted to the single chip circuit 4 by the signal collecting circuit 2, the single chip circuit 4 processes the signal to obtain a liquid signal, and the liquid signal is output by the switching value output circuit 5.
The circuit diagram of the power supply circuit is shown in fig. 3.
The circuit diagram of the single chip microcomputer circuit is shown in fig. 4.
The circuit diagram of the signal acquisition circuit is shown in fig. 5. The liquid change in the micro-tube and the electrode plate form resonance frequency change, the resonance frequency change is collected by the resonance frequency circuit and transmitted to the single chip circuit 4 by the signal collecting circuit 2, the single chip circuit 4 processes the signal to obtain a capacitor, and the capacitor is output by the switching value output circuit 5. A circuit diagram of the switching value output circuit is shown in fig. 6.
485 is a digital signal, switching value is a switching signal, 485 is used for a system, determines the state of the system and performs self-adjustment, the switching value signal is mainly used for informing or controlling actions after judging that liquid exists, a liquid level detection plate can be communicated with the system and confirms the state of the liquid level, and the automatic judgment and adjustment can be performed on the substrate through an upper computer.
The detector also comprises a reset circuit, the reset circuit is connected to the reset end of the singlechip circuit to provide a reset signal, the reset circuit adopts a reset chip CAT706RVI, the detector also comprises a watchdog circuit, and the circuit diagram of the reset circuit and the watchdog circuit is shown in figure 7.
The detector further comprises an LED display circuit, the LED display circuit is connected to the single chip microcomputer circuit 4, and after the single chip microcomputer circuit 4 processes signals to obtain the capacitor, the LED display circuit displays a bright lamp.
The detector also comprises an RS485 output circuit, and the circuit diagram of the RS485 output circuit is shown in figure 8.
The invention measures the resonance frequency of the inductor and the capacitor in a resonance mode to measure the size of the external capacitor, and according to a formula:
to calculate the resonant frequency, insideAD value versus resonant frequency for sensor channel conversion:
wherein: DATAX is the AD conversion value of channel x
FREFx is the reference frequency of channel X
Fsensorx is the resonant frequency detected by the sensor
At present, the default setting of the reference frequency in the liquid level meter is 50Mhz
From the above equation, it can be concluded that the reference channel 1-related parameter if there is ideally no parasitic capacitance is:
fsensor1＝6.5Mhz，DATA1＝35076561
the parameters of the measurement channel 0 are also the same, but the distance between the measurement channel 0 and ground is different from the distance between the reference channel 1 and ground at the time of design, and therefore the parasitic capacitance of the circuit board is also different, so that the DATA1-DATA0 are the inherent parasitic capacitance difference of the circuit board.
When an object is placed in the resonant magnetic field, the resonant frequency of the measurement channel changes, so that DOTA1 changes, so that DOTA1-DOTA0 changes, and 0.01Mhz can be detected at minimum, namely the minimum detection resolution is 0.7 pF.
The equipment does not need to be contacted with liquid, so that the equipment is not influenced by colors and impurities, the pipe wall is not polluted, and the detection precision is further improved while cleaning and maintenance are not needed; high precision is achieved by the detector and low cost is also achieved; meanwhile, waste caused by detection through a large amount of reagents like a quantitative ring is not needed, and the effects of no waste and high-efficiency detection are achieved.
To sum up, the advantage of this patent is through the effect that this detector realized contactless, high accuracy, low cost, no waste.
Claims (10)
1. A capacitance type liquid quantitative detection device is characterized by comprising a peristaltic pump (101), a multi-way electromagnetic valve (102), a quantitative ring (103) and a microtubule liquid detector, wherein the peristaltic pump (101) is connected with the microtubule liquid detector through a pipeline, a microtubule to be detected is fixed on the microtubule liquid detector for detection, the microtubule liquid detector comprises a detection circuit board (1), a signal acquisition circuit (2), a power circuit (3), a singlechip circuit (4) and a switching value output circuit (5), the singlechip circuit is connected with the signal acquisition circuit (2), the power circuit (3) and the switching value output circuit (5), the signal acquisition circuit (2) comprises an electrode plate and a resonant frequency circuit which are arranged on the detection circuit board (1), the microtubule and the electrode plate are attached, and the electrode plate is matched with the resonant frequency circuit, the liquid change in the microtube and the electrode plate form resonance frequency change, the resonance frequency change is collected by the resonance frequency circuit and is transmitted to the single chip circuit (4) by the signal collecting circuit (2), the single chip circuit (4) processes the signal to obtain a liquid signal, the liquid signal is output by the switching value output circuit (5), the microtube liquid detector is connected with the quantitative ring (103), the quantitative ring (103) is connected with the multi-way electromagnetic valve (102) through a pipeline, one side of the multi-way electromagnetic valve (102) is connected with a water sample assembly, the other side of the multi-way electromagnetic valve (102) is connected with a reagent assembly, and one interface of the multi-way electromagnetic valve (102) is connected with a detection module (104) through a pipeline; the detection module (104) is used for detecting water quality.
2. The capacitive quantitative liquid detection device according to claim 1, wherein the detection module (104) comprises a first solenoid valve (1041), a digestion colorimetric pool (1042) and a second solenoid valve (1043); the digestion colorimetric pool (1042) is connected between the first electromagnetic valve (1041) and the second electromagnetic valve (1043).
3. The capacitance type liquid quantitative detection device according to claim 1, wherein the water sample assembly comprises an offline water sample, a standard sample, pure water and an online water sample, and the offline water sample, the standard sample, the pure water and the online water sample are sequentially connected to the left side of the multi-way electromagnetic valve (102) from top to bottom.
4. The capacitive quantitative liquid detection device as claimed in claim 1, wherein the reagent assembly comprises a first reagent and a second reagent, and the first reagent and the second reagent are respectively connected to the right side of the multi-way solenoid valve (102).
5. The capacitance type liquid quantitative detection device as claimed in claim 1, wherein the bottom of the left side of the multi-way electromagnetic valve (102) is connected with a cleaning waste liquid through a pipeline.
6. The capacitance type liquid quantitative detection device as claimed in claim 1, wherein the bottom of the right side of the multi-way electromagnetic valve (102) is connected with reaction waste liquid through a pipeline.
7. The capacitance type liquid quantitative detection device according to claim 1, wherein the signal acquisition circuit (2) comprises three electrode plates (21), and the three electrode plates are positioned on the same straight line.
8. The capacitive quantitative liquid detection device as claimed in claim 1, wherein the micro-tube liquid detector further comprises a reset circuit, and the reset circuit is connected to a reset terminal of the single chip microcomputer circuit to provide a reset signal.
9. The capacitive quantitative liquid detection device as claimed in claim 1, wherein the micro-tube liquid detector further comprises a watchdog circuit and an LED display circuit.
10. The capacitive quantitative liquid detection device as claimed in claim 1, wherein the micro-tube liquid detector further comprises an RS485 output circuit.
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| CN201911417631.2A CN111044116A (en) | 2019-12-31 | 2019-12-31 | A capacitive liquid quantitative detection equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114965922A (en) * | 2022-05-13 | 2022-08-30 | 浙江微兰环境科技有限公司 | Small-sized multi-parameter water quality online monitoring system and method of integrated flow path and application thereof |
| CN118443383A (en) * | 2024-06-27 | 2024-08-06 | 雪城数智科技(河南)有限公司 | A high-precision quantitative method for weakly absorbing liquids |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07239263A (en) * | 1994-02-25 | 1995-09-12 | Aichi Electric Co Ltd | Liquid detector |
| DE19736178C1 (en) * | 1997-08-13 | 1999-01-28 | Ifak Inst Fuer Automation Und | Phase boundary detector for small fluid channels |
| US6546795B1 (en) * | 2001-11-13 | 2003-04-15 | Mitsubishi Electric Research Laboratories, Inc. | Wireless liquid level sensing system and method |
| CN101358868A (en) * | 2008-09-10 | 2009-02-04 | 南京林业大学 | Capacitive liquid level sensor and liquid level detection device using the sensor |
| CN101490567A (en) * | 2006-06-01 | 2009-07-22 | 伊莱克斯家用产品公司 | Method and device for measuring capacity of capacitive element |
| CN101718570A (en) * | 2009-11-25 | 2010-06-02 | 深圳和而泰智能控制股份有限公司 | Device and method for non-contact detection of water level |
| CN203923712U (en) * | 2014-05-30 | 2014-11-05 | 海信容声(广东)冰箱有限公司 | A kind of washing machine |
| CN105164505A (en) * | 2013-04-09 | 2015-12-16 | 巴鲁夫公司 | Capacitive fill level sensor |
| CN106512144A (en) * | 2016-11-17 | 2017-03-22 | 西北工业大学 | Intravenous infusion monitoring sensor based on radio frequency method |
| CN107860717A (en) * | 2017-11-22 | 2018-03-30 | 江苏蓝创智能科技股份有限公司 | Improved water quality testing meter and its application method |
| CN109406431A (en) * | 2018-12-13 | 2019-03-01 | 凯铭科技(杭州)有限公司 | A kind of liquid channel system and its control method of unit dosage |
| CN110153032A (en) * | 2019-04-19 | 2019-08-23 | 山东科技大学 | Bottled liquid level intelligent detection and rejection device |
| CN211234611U (en) * | 2019-12-31 | 2020-08-11 | 浙江微兰环境科技有限公司 | Water quality testing capacitanc liquid proportioning device |
-
2019
- 2019-12-31 CN CN201911417631.2A patent/CN111044116A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07239263A (en) * | 1994-02-25 | 1995-09-12 | Aichi Electric Co Ltd | Liquid detector |
| DE19736178C1 (en) * | 1997-08-13 | 1999-01-28 | Ifak Inst Fuer Automation Und | Phase boundary detector for small fluid channels |
| US6546795B1 (en) * | 2001-11-13 | 2003-04-15 | Mitsubishi Electric Research Laboratories, Inc. | Wireless liquid level sensing system and method |
| CN101490567A (en) * | 2006-06-01 | 2009-07-22 | 伊莱克斯家用产品公司 | Method and device for measuring capacity of capacitive element |
| CN101358868A (en) * | 2008-09-10 | 2009-02-04 | 南京林业大学 | Capacitive liquid level sensor and liquid level detection device using the sensor |
| CN101718570A (en) * | 2009-11-25 | 2010-06-02 | 深圳和而泰智能控制股份有限公司 | Device and method for non-contact detection of water level |
| CN105164505A (en) * | 2013-04-09 | 2015-12-16 | 巴鲁夫公司 | Capacitive fill level sensor |
| CN203923712U (en) * | 2014-05-30 | 2014-11-05 | 海信容声(广东)冰箱有限公司 | A kind of washing machine |
| CN106512144A (en) * | 2016-11-17 | 2017-03-22 | 西北工业大学 | Intravenous infusion monitoring sensor based on radio frequency method |
| CN107860717A (en) * | 2017-11-22 | 2018-03-30 | 江苏蓝创智能科技股份有限公司 | Improved water quality testing meter and its application method |
| CN109406431A (en) * | 2018-12-13 | 2019-03-01 | 凯铭科技(杭州)有限公司 | A kind of liquid channel system and its control method of unit dosage |
| CN110153032A (en) * | 2019-04-19 | 2019-08-23 | 山东科技大学 | Bottled liquid level intelligent detection and rejection device |
| CN211234611U (en) * | 2019-12-31 | 2020-08-11 | 浙江微兰环境科技有限公司 | Water quality testing capacitanc liquid proportioning device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114965922A (en) * | 2022-05-13 | 2022-08-30 | 浙江微兰环境科技有限公司 | Small-sized multi-parameter water quality online monitoring system and method of integrated flow path and application thereof |
| CN118443383A (en) * | 2024-06-27 | 2024-08-06 | 雪城数智科技(河南)有限公司 | A high-precision quantitative method for weakly absorbing liquids |
| CN118443383B (en) * | 2024-06-27 | 2025-07-29 | 雪城数智科技(河南)有限公司 | High-precision quantification method for weak absorption liquid |
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