CN102279031B - Noncontact type liquid level measuring device - Google Patents
Noncontact type liquid level measuring device Download PDFInfo
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- CN102279031B CN102279031B CN2011102131579A CN201110213157A CN102279031B CN 102279031 B CN102279031 B CN 102279031B CN 2011102131579 A CN2011102131579 A CN 2011102131579A CN 201110213157 A CN201110213157 A CN 201110213157A CN 102279031 B CN102279031 B CN 102279031B
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- liquid level
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- level sensor
- contact capacitive
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Abstract
The invention relates to a noncontact type liquid level measuring device which comprises a urine processing cavity of an intelligent urine processing device, a water outlet pipeline, a noncontact type capacitance liquid level sensor, a connecting line for noncontact type capacitance liquid level sensor and an SCM (single-chip microcomputer), a water inlet pipeline and an SCM control part, wherein the noncontact type capacitance liquid level sensor and the water outlet pipeline are arranged on one side of the urine processing cavity; the water outlet pipeline is arranged on the lower part of the other side of the urine processing cavity; and the noncontact type capacitance liquid level sensor is connected to the SCM control part through the connecting line. The noncontact type liquid level measuring device can be used for measuring the level of flushing water inside the urine processing cavity in the intelligent urine processing device. The noncontact type liquid level measuring device has better stability and reliability.
Description
Technical field
The present invention relates to a kind of contactless liquid level detection device, in order to solve the just detection problem of process chambers interior flushing water liquid level of urine in the intelligent treating device for urination and defecation.
Background technology
In the prior art; Urine in the intelligence treating device for urination and defecation just detection method of process chambers interior flushing water liquid level is as electrode with the pair of conductive stainless steel screw; This is installed in position suitable in the cavity to electrode, with lead this is connected to controller to electrode then.When liquid level was not enough, electrode loop broke off.When liquid level reaches the electrode installation site, the electrode loop conducting.Controller just can judge whether liquid level reaches the height of appointment according to the break-make of electrode loop like this.
There is following shortcoming in said method: at first, thereby wash-down water possibly be splashed on the conductive electrode and produces misleading, and influences the stability of Level Detection.Secondly, have salinity and corrosive material owing to be mixed with stool and urine etc. in the wash-down water, conductive electrode certainly will get rusty in long-term use, influences electric conductivity, also possibly cause electrode mounting hole water to be revealed because get rusty.In addition, the method causes psychological burden to the user easily because the conductive electrode installation exposes, and is attractive in appearance inadequately.
Summary of the invention
The objective of the invention is shortcoming, a kind of contactless liquid level detection device is provided to prior art.
The present invention realizes through following technical scheme: the urine of intelligent treating device for urination and defecation just the suitable height and position over against side of the water delivering orifice pipeline of process chambers non-contact capacitive formula liquid level sensor is installed.When the wash-down water liquid level position of urinating just process chambers arrived the position of center line of non-contact capacitive formula liquid level sensor, the pilot lamp of non-contact capacitive formula liquid level sensor was lighted, and shows that the wash-down water liquid level has reached the warning line position.
The present invention includes wash-down water Level Detection part and Single-chip Controlling part, just partly form by connection line, water inlet pipeline, the Single-chip Controlling of process chambers, water delivering orifice pipeline, non-contact capacitive formula liquid level sensor, non-contact capacitive formula liquid level sensor and single-chip microcomputer by the urine of intelligent treating device for urination and defecation for its structure; Non-contact capacitive formula liquid level sensor and water inlet piping erection are in urinating a just side of process chambers, and the water delivering orifice pipeline is installed in the opposite side bottom, and liquid level sensor through line and Single-chip Controlling partly in succession.
Non-contact capacitive formula liquid level sensor comprises: accessory power outlet, pilot lamp, benchmark gauge hole, accessory power outlet comprise: 5V working power end VCC, sensor signal output terminal, earth terminal GND.When the half of liquid level to be detected above non-contact capacitive formula liquid level sensor area, pilot lamp is lighted, sensor signal output terminal output low level.The benchmark gauge hole is used to adjust the sensitivity of non-contact capacitive formula liquid level sensor, promptly adjusts the ratio of the shared non-contact capacitive formula liquid level sensor area of liquid level to be detected.
The 5V working power end VCC of non-contact capacitive formula liquid level sensor, sensor signal output terminal, three lines of earth terminal GND are connected to the sensor gang socket P2 in the Single-chip Controlling part; Wherein the 5V working power end VCC of non-contact capacitive formula liquid level sensor is connected to 1 pin of sensor gang socket P2; The sensor signal output terminal of non-contact capacitive formula liquid level sensor is connected to 2 pin of sensor gang socket P2, and the earth terminal GND of non-contact capacitive formula liquid level sensor is connected to 3 pin of sensor gang socket P2.
Single-chip Controlling partly comprises: single-chip microcomputer U1, sensor gang socket P2, signal pull-up circuit R3, R4, sensor signal input pin PD0, single-chip microcomputer U1 crystal oscillating circuit Y1, C29, C30; Single-chip microcomputer U1 electric source filter circuit C27, C28, power supply VCC_5V and ground connection; The pull-up circuit R3 of Single-chip Controlling part, R4 is used for guaranteeing from the stability of sensor input signal to the PD0 input pin of single-chip microcomputer U1.Single-chip microcomputer U1 adopts ATmega128-16AC, and by Y1, the circuit that C29, C30 connect into provides system clock for single-chip microcomputer U1, and by C27, the circuit that C28 connects into is that the working power of single-chip microcomputer U1 provides filtering, prevents external interference and causes working power unstable.
Single-chip microcomputer U1 at first accomplishes initialization, and its fundamental purpose is to accomplish the configuration of input and output pin, Abort Timer, is set to low level and triggers interruption.When the wash-down water liquid level position arrives the position of center line of non-contact capacitive formula liquid level sensor, sensor signal output terminal output low level, 2 pin of the socket P2 of Single-chip Controlling part also are low level; Through pull-up circuit R3, be input to the PD0 pin of single-chip microcomputer U1 behind the R4, this moment, the PD0 pin was a low level; Because the PD0 pin is the INT0 of single-chip microcomputer U1; When initialization, be provided with low level and trigger interruption, interrupt, judge that the wash-down water liquid level position arrives the warning line position so single-chip microcomputer U1 triggers.Trigger interrupt service subroutine this moment, turn-offs the solenoid valve of water inlet pipeline front end, and open the water that air pump will urinate in the just process chambers and force to discharge from the water delivering orifice pipeline, avoids wash-down water to spill on the bed.When wash-down water liquid level position no show warning line position, the PD0 pin is a high level, and the INT0 of single-chip microcomputer U1 is not triggered, and systemic circulation continues to detect.
Beneficial effect of the present invention: adopt of the collection of non-contact capacitive formula liquid level sensor, because this sensor adopts pure electronic circuit formula structure, on-mechanical working method as the front-end position signal; The stable performance life-span is durable, high stable, high sensitive; Anti-interference is good, does not receive outside electromagnetic interference, is fit to complex environment and uses; So this device can overcome the deficiency that receives external interference in the prior art easily, for the detection of object relative position provides stability and reliability preferably.
Owing to adopted the mode of contactless Level Detection, be not splashed to the phenomenon that produces misleading on the conductive electrode so wash-down water can not occur, improved the reliability of liquid level detection circuit.
Owing to adopted the mode of contactless Level Detection, be mixed with stool and urine etc. in the wash-down water and have the performance that salinity and corrosive material can not influence non-contact capacitive formula liquid level sensor, problem with the mounting hole leakage can not occur getting rusty.
Because adopted the mode of contactless Level Detection, the method can be installed in non-contact capacitive formula liquid level sensor urinates the just outside of process chambers, and outer enclosure in addition, can not cause psychological burden like this to the user, and attractive in appearance relatively.
This apparatus structure is succinct, uses easily.
Description of drawings
Fig. 1 is the general illustration of liquid level detection device of the present invention.
Among the figure: 1, water delivering orifice pipeline 2, wash-down water liquid level position 3, urinate just connection line 5, Single-chip Controlling part 6, the non-contact capacitive formula liquid level sensor position of center line of process chambers 4, non-contact capacitive formula liquid level sensor and single-chip microcomputer
7, non-contact capacitive formula liquid level sensor 8, inlet channel.
Fig. 2 is a non-contact capacitive formula liquid level sensor structural drawing of the present invention.
Among the figure: 9,5V working power end VCC 10, sensor signal output terminal 11, earth terminal GND 12, accessory power outlet 13, pilot lamp 14, benchmark gauge hole.
Fig. 3 is a control circuit schematic diagram of the present invention.
Fig. 4 is a control program process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment is further described.
The present invention includes wash-down water Level Detection part and Single-chip Controlling part, just partly form by connection line, water inlet pipeline, the Single-chip Controlling of process chambers, water delivering orifice pipeline, non-contact capacitive formula liquid level sensor, non-contact capacitive formula liquid level sensor and single-chip microcomputer by the urine of intelligent treating device for urination and defecation for its structure; Non-contact capacitive formula liquid level sensor and water inlet piping erection are in urinating a just side of process chambers, and the water delivering orifice pipeline is installed in the opposite side bottom, and liquid level sensor through line and Single-chip Controlling partly in succession.
Non-contact capacitive formula liquid level sensor comprises: accessory power outlet, pilot lamp, benchmark gauge hole, accessory power outlet comprise: 5V working power end VCC, sensor signal output terminal, earth terminal GND.When the half of liquid level to be detected above non-contact capacitive formula liquid level sensor area, pilot lamp is lighted, sensor signal output terminal output low level.The benchmark gauge hole is used to adjust the sensitivity of non-contact capacitive formula liquid level sensor, promptly adjusts the ratio of the shared non-contact capacitive formula liquid level sensor area of liquid level to be detected.
The 5V working power end VCC of non-contact capacitive formula liquid level sensor, sensor signal output terminal, three lines of earth terminal GND are connected to the sensor gang socket P2 in the Single-chip Controlling part; Wherein the 5V working power end VCC of non-contact capacitive formula liquid level sensor is connected to 1 pin of sensor gang socket P2; The sensor signal output terminal of non-contact capacitive formula liquid level sensor is connected to 2 pin of sensor gang socket P2, and the earth terminal GND of non-contact capacitive formula liquid level sensor is connected to 3 pin of sensor gang socket P2.
Single-chip Controlling partly comprises: single-chip microcomputer U1, sensor gang socket P2, signal pull-up circuit R3, R4, sensor signal input pin PD0, single-chip microcomputer U1 crystal oscillating circuit Y1, C29, C30; Single-chip microcomputer U1 electric source filter circuit C27, C28, power supply VCC_5V and ground connection; The pull-up circuit R3 of Single-chip Controlling part, R4 is used for guaranteeing from the stability of sensor input signal to the PD0 input pin of single-chip microcomputer U1.Single-chip microcomputer U1 adopts ATmega128-16AC, and by Y1, the circuit that C29, C30 connect into provides system clock for single-chip microcomputer U1, and by C27, the circuit that C28 connects into is that the working power of single-chip microcomputer U1 provides filtering, prevents external interference and causes working power unstable.
Single-chip microcomputer U1 at first accomplishes initialization, and its fundamental purpose is to accomplish the configuration of input and output pin, Abort Timer, is set to low level and triggers interruption.When the wash-down water liquid level position arrives the position of center line of non-contact capacitive formula liquid level sensor, sensor signal output terminal output low level, 2 pin of the socket P2 of Single-chip Controlling part also are low level; Through pull-up circuit R3, be input to the PD0 pin of single-chip microcomputer U1 behind the R4, this moment, the PD0 pin was a low level; Because the PD0 pin is the INT0 of single-chip microcomputer U1; When initialization, be provided with low level and trigger interruption, interrupt, judge that the wash-down water liquid level position arrives the warning line position so single-chip microcomputer U1 triggers.Trigger interrupt service subroutine this moment, turn-offs the solenoid valve of water inlet pipeline front end, and open the water that air pump will urinate in the just process chambers and force to discharge from the water delivering orifice pipeline, avoids wash-down water to spill on the bed.When wash-down water liquid level position no show warning line position, the PD0 pin is a high level, and the INT0 of single-chip microcomputer U1 is not triggered, and systemic circulation continues to detect.
Claims (1)
1. contactless liquid level detection device; Comprise and urinate just process chambers, water delivering orifice pipeline, water inlet pipeline, liquid level sensor, Single-chip Controlling part; It is characterized in that: the liquid level sensor in the said device is non-touch mode capacitive liquid level sensor; Non-contact capacitive formula liquid level sensor is installed on urinates just the outer side of process chambers, and through line and Single-chip Controlling partly in succession;
Non-contact capacitive formula liquid level sensor comprises accessory power outlet, pilot lamp, benchmark gauge hole, and accessory power outlet comprises: 5V working power end VCC, sensor signal output terminal, earth terminal GND; The 5V working power end VCC of non-contact capacitive formula liquid level sensor, sensor signal output terminal, three lines of earth terminal GND are connected to the sensor gang socket P2 in the Single-chip Controlling part; Wherein the 5V working power end VCC of non-contact capacitive formula liquid level sensor is connected to 1 pin of sensor gang socket P2; The sensor signal output terminal of non-contact capacitive formula liquid level sensor is connected to 2 pin of sensor gang socket P2, and the earth terminal GND of non-contact capacitive formula liquid level sensor is connected to 3 pin of sensor gang socket P2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102131579A CN102279031B (en) | 2011-07-28 | 2011-07-28 | Noncontact type liquid level measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102131579A CN102279031B (en) | 2011-07-28 | 2011-07-28 | Noncontact type liquid level measuring device |
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| CN102279031A CN102279031A (en) | 2011-12-14 |
| CN102279031B true CN102279031B (en) | 2012-11-28 |
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| CN2011102131579A Expired - Fee Related CN102279031B (en) | 2011-07-28 | 2011-07-28 | Noncontact type liquid level measuring device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104677462A (en) * | 2015-02-10 | 2015-06-03 | 浙江沁园水处理科技有限公司 | Self-adapted non-immersion type liquid level detection device and detection method |
| CN104800067B (en) * | 2015-05-12 | 2017-03-29 | 广州白云蓝天电子科技有限公司 | Medical constant-temperature flusher |
| CN106037766A (en) * | 2016-07-01 | 2016-10-26 | 曾丽华 | Intelligent urine bottle with urine output monitoring function |
| CN112842074A (en) * | 2021-01-12 | 2021-05-28 | 珠海格力电器股份有限公司 | Liquid level detection method and device, storage medium and kettle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2142979Y (en) * | 1992-12-05 | 1993-09-29 | 南京市环卫车辆设备厂 | Alarm controller of capacitor-type for tumbrel liquid level not contacted with each other |
| CN1143745A (en) * | 1995-12-11 | 1997-02-26 | 张胜杰 | Infusion monitoring reporter |
| CN101007535A (en) * | 2007-01-11 | 2007-08-01 | 浙江大学 | Vacuum storage tank type defecation discharge system for high speed train |
| CN101430218A (en) * | 2008-12-06 | 2009-05-13 | 俞险峰 | Non-contact type capacitance induction level sensor |
-
2011
- 2011-07-28 CN CN2011102131579A patent/CN102279031B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2142979Y (en) * | 1992-12-05 | 1993-09-29 | 南京市环卫车辆设备厂 | Alarm controller of capacitor-type for tumbrel liquid level not contacted with each other |
| CN1143745A (en) * | 1995-12-11 | 1997-02-26 | 张胜杰 | Infusion monitoring reporter |
| CN101007535A (en) * | 2007-01-11 | 2007-08-01 | 浙江大学 | Vacuum storage tank type defecation discharge system for high speed train |
| CN101430218A (en) * | 2008-12-06 | 2009-05-13 | 俞险峰 | Non-contact type capacitance induction level sensor |
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