CN207908008U - A kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory - Google Patents
A kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory Download PDFInfo
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- CN207908008U CN207908008U CN201820397519.1U CN201820397519U CN207908008U CN 207908008 U CN207908008 U CN 207908008U CN 201820397519 U CN201820397519 U CN 201820397519U CN 207908008 U CN207908008 U CN 207908008U
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- liquid level
- conductor spring
- delay line
- ultrasonic
- line memory
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Abstract
The utility model discloses a kind of liquid level detection systems of novel ultrasonic ultrasonic delay line memory, including conductor spring and PCB, one end of the conductor spring is connect with one for containing the container of liquid, the other end of the conductor spring is connect with the controller on the PCB, the liquid level of the container forms an inductance capacitance by conductor spring and ground, the controller judges the height of liquid level in the container according to the variation of the inductance capacitance, the linear change that liquid level and electric signal can be reacted ensure that the stability and reliability of system detectio；Secondly hardware input is small, of low cost；Special sampling rectification circuit need not be increased, and hardware arrangement provides independent space without strict demand to the design of high-frequency circuit so that detection circuit may be located remotely from resonance circuit, and system is stablized, and EMC tests are easy to pass through；Environmental suitability is strong, is not easy by temperature, humidity, bad caused by the influences such as dust.
Description
Technical field
The utility model is related to ultrasonic ultrasonic delay line memory technical fields, and in particular to a kind of liquid of novel ultrasonic ultrasonic delay line memory
Position detecting system.
Background technology
In existing daily life for humidifying, flavoring, sterilization or ornamental supersonic atomizer, can will be contained in liquid
Liquid in body container is atomized the liquid by the ultrasonic wave that supersonic generator generates, to realize its atomizing functions.Ultrasound
Wave Atomazing transducing chip can work normally in the state of having liquid, but while working in the state of no liquid can damage ultrasonic fog
Change transduction piece.Existing water shortage protection method generally incudes the height of water level using magnetic reed tube, and then controls ultrasonic atomization
The work of device, such as China Patent No. CN02271748.X, it is entitled " to be atomized using the miniature ultrasonic of magnetic inducted level switch
Excessive low water level protection scheme employed in the utility model patent of device ".However, incuding the water shortage of the height of water level using magnetic reed tube
Protection scheme has the disadvantage that,
1), the detection of magnetic reed tube water shortage is maximum the disadvantage is that reliability is low, the detecting system that magnetic device is constituted with magnetic reed tube
Only there are two types of logical relation 0＆1；Due to magnetic contrast, spatial diversity, it is easy to false triggering；
2), the Machine Design of magnetic reed tube water shortage detecting system is complicated, the interior design of serious limit product；
3), magnetic reed tube water shortage detecting system needs reliable waterproofing design, poor reliability；
4), magnetic reed tube switch environment resistant pollution capacity is poor, is easy by dust, the pollutions such as greasy dirt, ELECTROSTATIC DUST, moisture
Cause electrical property bad.
Also a kind of excessive low water level protection scheme be resonance end sample rectification by amplitude detection judge exsiccosis, but this
There is also following disadvantages for kind scheme：
1. resonance sample magnitude detecting system will increase special sampling rectification circuit, circuit system is complicated；
2. resonance sample magnitude detecting system is easy because sample circuit must be close to resonance circuit by resonance circuit
Interference, PCB design cannot achieve digital-to-analogue separation, and the separation of high frequency low frequency, EMC tests are extremely difficult to be passed through；
3. hardware cost is higher.
Invention content
The technical problem to be solved by the utility model is to provide a kind of dependable performance, low cost, environmental suitability are strong
Novel ultrasonic ultrasonic delay line memory liquid level detection system.
In order to solve the above technical problems, the utility model uses technical solution as described below：
A kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory, including conductor spring and PCB, the conductor spring
One end is connect with one for containing the container of liquid, and the other end of the conductor spring is connect with the controller on the PCB, institute
The liquid level for stating container forms an inductance capacitance by conductor spring and ground, and the controller is sentenced according to the variation of the inductance capacitance
The height of liquid level in the disconnected container.
Preferably, the controller is using the chip for being built-in with capacitive sensing module or AFE processing modules
Preferably, the controller is a MCU.
Preferably, it is connected with a resistance between the conductor spring and the controller.
The advantageous effects of the utility model are：The controller of above-mentioned liquid level detection system is according to the inductance capacitance
Variation judge the height of liquid level in the container, the linear change of liquid level and electric signal can be reacted, ensure that system detectio
Stability and reliability；Secondly hardware input is small, of low cost；Special sampling rectification circuit, and hardware need not be increased
Layout provides independent space without strict demand, to the design of high-frequency circuit so that detection circuit may be located remotely from resonance circuit, be
System is stablized, and EMC tests are easy to pass through；Environmental suitability is strong, is not easy by temperature, humidity, bad caused by the influences such as dust.
Description of the drawings
Fig. 1 is that structure of the liquid level detection system of the novel ultrasonic ultrasonic delay line memory of the utility model on a visual angle is shown
It is intended to；
Fig. 2 is knot of the liquid level detection system of the novel ultrasonic ultrasonic delay line memory of the utility model on another visual angle
Structure schematic diagram；
Fig. 3 is the circuit connection diagram of the liquid level detection system of the novel ultrasonic ultrasonic delay line memory of the utility model；
Fig. 4 is the work-based logic schematic diagram of the liquid level detection system of the novel ultrasonic ultrasonic delay line memory of the utility model.
Specific implementation mode
To make those skilled in the art that the purpose of this utility model, technical solution and excellent be more clearly understood
Point is further elaborated the utility model below in conjunction with drawings and examples.
As shown in Figs. 1-3, in one embodiment of the utility model, the level sensing system of novel ultrasonic ultrasonic delay line memory
System includes conductor spring 2 and PCB3, and one end of the conductor spring 2 is connect with one for containing the container 1 of liquid, described
The other end of conductor spring 2 is connect with the controller U1 on the PCB3, and the controller U1 is a MCU.The liquid of the container
Face forms an inductance capacitance by conductor spring and ground, and the controller judges the container according to the variation of the inductance capacitance
The height of interior liquid level.
Further, in the liquid level detection system of the novel ultrasonic ultrasonic delay line memory, the conductor spring 2 and PCB3
The pad (PAD) of junction constitutes a capacitance C1 with ground (GND), this capacitance is smaller；Liquid level 11 passes through when container 1 has water
Conductor spring 2 forms inductance capacitance C2 with ground (GND), this capacitance is bigger, and using ground as circuit, therefore, the induction
Capacitance C2, which is equivalent to, to be connected in parallel in the capacitance C1 between controller U1 and ground, the input test side phase of such controller U1
When in connection, there are one bulky capacitor C1+C2；When container 1 does not have water, liquid level disappears, and inductance capacitance C2 disappears, controller
U1 is only able to detect capacitance C1 in input test side, therefore may determine that container 1 does not have water, and then the controller U1 controls mist
Change transduction piece to be stopped, to realize the function of excessive low water level protection.
As shown in figure 4, being connected with resistance a R6, the controller U1 between the conductor spring 2 and the controller U1
Using the chip for being built-in with capacitive sensing module or AFE processing modules, such as BS84B08A-3 CY8C4125LQI-483 types
Number chip.Pad, liquid level 11 and the controller U1 of the resistance R6, conductor spring 2, conductor spring 2 and the junctions PCB3
Internal module constitute oscillating circuit, the liquid level for the container to ultrasonic ultrasonic delay line memory is detected and in container water shortage time control
Transduction piece processed is stopped, and entire work-based logic is as follows：
Controller U1 pre-establishes, stores functional relation mathematical model for reacting fluid change and voltage signal.
When level sensing, controller U1 first converts the variation of liquid level to the variation of capacitance, then the variation of capacitance is converted into voltage letter
Number change, finally according to voltage signal judge container 1 whether water shortage, when 1 water shortage of container, controller U1 control atomization transducing
Piece is stopped.
The beneficial effects of the utility model are：
1) liquid level detection system of the utility model establishes fluid change and the functional relation of electric signal, being capable of reaction solution
The linear change in face and electric signal ensure that the stability and reliability of system detectio.
2) only increase a conductor spring, recycle the pad on original atomization system PCB, the earth, liquid level that can build
Liquid level detection system, hardware input is small, of low cost.
3) special sampling rectification circuit need not be increased, and hardware arrangement gives the design of high-frequency circuit without strict demand
There is provided independent space so that detection circuit may be located remotely from resonance circuit, and system is stablized, and EMC tests are easy to pass through.
4) environmental suitability is strong, is not easy by temperature, humidity, dust etc. influences and causes bad.
The above is only the preferred embodiment of the present invention, rather than does limit in any form to the utility model
System.Those skilled in the art can impose various equivalent changes and improvement on the basis of the above embodiments, all to be wanted in right
The equivalent variations done in range or modification are asked, should fall within the protection scope of this utility model.
Claims (4)
1. a kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory, it is characterised in that：It is described including conductor spring and PCB
One end of conductor spring is connect with one for containing the container of liquid, the other end and the control on the PCB of the conductor spring
Device connection processed, the liquid level of the container form an inductance capacitance by conductor spring and ground, and the controller is according to the induction
The variation of capacitance judges the height of liquid level in the container.
2. the liquid level detection system of novel ultrasonic ultrasonic delay line memory as described in claim 1, it is characterised in that：The controller
Using the chip for being built-in with capacitive sensing module or AFE processing modules.
3. the liquid level detection system of novel ultrasonic ultrasonic delay line memory as described in claim 1, it is characterised in that：The controller
For a MCU.
4. the liquid level detection system of novel ultrasonic ultrasonic delay line memory as described in any one of claims 1-3, it is characterised in that：Institute
It states and is connected with a resistance between conductor spring and the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820397519.1U CN207908008U (en) | 2018-03-23 | 2018-03-23 | A kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820397519.1U CN207908008U (en) | 2018-03-23 | 2018-03-23 | A kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207908008U true CN207908008U (en) | 2018-09-25 |
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| CN201820397519.1U Active CN207908008U (en) | 2018-03-23 | 2018-03-23 | A kind of liquid level detection system of novel ultrasonic ultrasonic delay line memory |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426743A (en) * | 2019-07-23 | 2019-11-08 | 深圳博英特科技有限公司 | A kind of ultrasonic atomizer and water shortage detection device |
| CN112641133A (en) * | 2020-11-27 | 2021-04-13 | 上海烟草集团有限责任公司 | Liquid fog filters smoking set with operation control |
| CN113624296A (en) * | 2021-07-09 | 2021-11-09 | 杭州和而泰智能控制技术有限公司 | Capacitive water level detection device and algorithm |
-
2018
- 2018-03-23 CN CN201820397519.1U patent/CN207908008U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426743A (en) * | 2019-07-23 | 2019-11-08 | 深圳博英特科技有限公司 | A kind of ultrasonic atomizer and water shortage detection device |
| CN112641133A (en) * | 2020-11-27 | 2021-04-13 | 上海烟草集团有限责任公司 | Liquid fog filters smoking set with operation control |
| CN113624296A (en) * | 2021-07-09 | 2021-11-09 | 杭州和而泰智能控制技术有限公司 | Capacitive water level detection device and algorithm |
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| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: B901 and b906, innovation Plaza, No. 2007, Pingshan Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Intelligent Technology Co., Ltd. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili Street Nanshan Chi Park building A7 503-A Patentee before: Shenzhen Intelligent Technology Co., Ltd. |
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| CP02 | Change in the address of a patent holder |