CN219798478U - Liquid level measurement assembly - Google Patents
Liquid level measurement assembly Download PDFInfo
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- CN219798478U CN219798478U CN202321344665.5U CN202321344665U CN219798478U CN 219798478 U CN219798478 U CN 219798478U CN 202321344665 U CN202321344665 U CN 202321344665U CN 219798478 U CN219798478 U CN 219798478U
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- signal
- circuit
- liquid level
- display module
- fluid level
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- 239000007788 liquid Substances 0.000 title claims abstract description 56
- 238000005259 measurement Methods 0.000 title claims abstract description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 239000010703 silicon Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000009792 diffusion process Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims description 13
- 230000008054 signal transmission Effects 0.000 claims description 5
- 229910000619 316 stainless steel Inorganic materials 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 239000010865 sewage Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000003518 caustics Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a liquid level measurement assembly, comprising: the device comprises a diffusion silicon pressure sensor, a conversion circuit and a liquid level display module; the diffusion silicon pressure sensor is connected with the conversion circuit, and the conversion circuit is connected with the liquid level display module; the diffusion silicon pressure sensor is used for collecting pressure signals and generating corresponding resistance value change signals based on the pressure signals; the conversion circuit is used for detecting the resistance value change signal and converting the resistance value change signal into a corresponding voltage signal, amplifying the voltage signal, converting the amplified voltage signal into a standard current signal, and transmitting the standard current signal to the liquid level display module; the liquid level display module is used for receiving the standard current signal and displaying the measured liquid level data. The liquid level measuring device is simple in structure, convenient to operate, and capable of accurately measuring liquid level data and conducting long-distance stable transmission.
Description
Technical Field
The utility model relates to the technical field of drainage equipment, in particular to a liquid level measurement assembly.
Background
At present, the sewage lifter is widely applied to places such as basements, ships, vehicles and the like far away from drainage risers and places with poor drainage conditions, and is characterized in that a water pump is controlled to be started to pump sewage according to the detected liquid level height. The sewage lifting device adopts the pneumatic type generally, the operation mode of traditional pneumatic type sewage lifting device is that put into the PVC pipe in the effluent water sump, and the top of PVC pipe is connected with hose and pressure sensor, when water gets into the PVC pipe, corresponding pressure that can produce in the hose, pressure sensor detects pressure then can convert corresponding resistance value this moment, calculates the liquid level height in the effluent water sump by the resistance value.
However, the conventional pneumatic type sewage lifter has the following problems: steam is generated in the hose under the scene of higher temperature, and the hose is blocked after a long time; some waste materials in the sewage pool can generate waste gas to enter the hose, so that the measurement of the air pressure change is inaccurate; corrosive substances in the sewage pool can cause cracking and pressure relief of the pipe, so that the acquisition pressure is inaccurate; the pressure sensor material can deform under long-term pressure or moist environment, so that errors are generated in the measured pressure value; the long-distance transmission of signals is interfered and loss is generated; all the problems can affect the liquid level measurement precision, and the measured liquid level data has larger error.
Therefore, how to improve the accuracy of the liquid level measurement data and realize the long-distance stable transmission of the liquid level measurement data is a problem that needs to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the utility model provides a liquid level measuring assembly which has a simple structure, is convenient to operate, and can accurately measure liquid level data and perform long-distance stable transmission.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a fluid level measurement assembly, comprising: the device comprises a diffusion silicon pressure sensor, a conversion circuit and a liquid level display module;
the diffusion silicon pressure sensor is connected with the conversion circuit, and the conversion circuit is connected with the liquid level display module;
the diffusion silicon pressure sensor is used for collecting pressure signals and generating corresponding resistance value change signals based on the pressure signals;
the conversion circuit is used for detecting the resistance value change signal and converting the resistance value change signal into a corresponding voltage signal, amplifying the voltage signal, converting the amplified voltage signal into a standard current signal, and sending the standard current signal to the liquid level display module;
the liquid level display module is used for receiving the standard current signal and displaying measured liquid level data.
Preferably, the conversion circuit comprises a signal input circuit, an instrument amplification circuit and a voltage-to-current circuit which are electrically connected in sequence;
the signal input circuit is used for detecting the resistance value change signal and converting the resistance value change signal into a corresponding voltage signal;
the meter amplifying circuit is used for amplifying the voltage signal;
the voltage-to-current circuit is used for converting the amplified voltage signal into a standard current signal.
Preferably, the signal input circuit adopts a wheatstone bridge circuit consisting of 4 resistors.
Preferably, the instrument amplifying circuit adopts a three-operational amplifier instrument amplifying circuit.
Preferably, the voltage-to-current circuit adopts a triode constant current source circuit, and the triode constant current source circuit comprises: the operational amplifier, the triode and 2 resistors; the collector of the triode is connected with a first resistor, and the emitter is connected with a second resistor; the output end of the operational amplifier is connected with the base electrode of the triode, the reverse input end of the operational amplifier is connected with the second resistor and then grounded, and the homodromous input end of the operational amplifier is connected with the amplifying circuit of the three operational amplifiers.
Preferably, the voltage of the same-direction input end of the operational amplifier is equal to the voltage of the opposite-direction input end, and the emitter current of the triode is equal to the collector current.
Preferably, the standard current signal is adjusted by adjusting the resistance of the wheatstone bridge circuit.
Preferably, the diffusion silicon pressure sensor is made of 316 stainless steel.
Preferably, the device further comprises a power supply module for supplying power to the diffused silicon pressure sensor, the conversion circuit and the liquid level display module.
Preferably, the conversion circuit is connected with the liquid level display module through a signal transmission line.
Compared with the prior art, the liquid level measuring assembly provided by the utility model has the advantages that the 316 stainless steel material is adopted for the diffusion silicon pressure sensor, the corrosion resistance is strong, the diffusion silicon pressure sensor can accurately measure pressure signals and generate corresponding resistance value change signals, the resistance value change signals are converted into voltage signals through the conversion circuit, the voltage signals are amplified and converted into current signals and then output, the collected original pressure signals can be prevented from being disturbed and lost in long-distance transmission, the long-distance stable transmission of the collected signals is realized, and the collected and measured liquid level values are more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic diagram of a conversion circuit according to the present utility model.
Fig. 3 is a schematic view of field installation of an application scenario of a liquid level measurement assembly provided by the utility model.
Reference numerals: 1-PVC pipeline, 2-diffusion silicon pressure sensor, 3-converting circuit, 4-signal transmission line, 5-liquid level display module, 6-controller, 7-micro control unit, 8-water pump, 9-effluent water sump.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, an embodiment of the present utility model discloses a liquid level measurement assembly, including: the device comprises a diffused silicon pressure sensor, a conversion circuit and a liquid level display module.
The diffusion silicon pressure sensor is connected with the conversion circuit, and the conversion circuit is connected with the liquid level display module.
The diffusion silicon pressure sensor is used for collecting pressure signals and generating corresponding resistance value change signals based on the pressure signals;
preferably, when pressure is directly applied to the diaphragm (stainless steel or ceramic) of the diffused silicon pressure sensor, the diaphragm generates micro displacement proportional to the pressure of the medium, the resistance value of the diffused silicon pressure sensor is correspondingly changed, the change of the resistance value is detected by a conversion circuit, and a standard current signal corresponding to the pressure is converted and output.
Preferably, the measuring precision of the diffused silicon pressure sensor is high and can reach 0.1cm.
Preferably, the diffusion silicon pressure sensor is made of 316 stainless steel, and has the characteristics of strong corrosion resistance and water resistance.
The conversion circuit is used for detecting the resistance value change signal and converting the resistance value change signal into a corresponding voltage signal, amplifying the voltage signal, converting the amplified voltage signal into a standard current signal, and sending the standard current signal to the liquid level display module.
Preferably, the standard current signal is 4-20mA.
Preferably, as shown in fig. 2, the conversion circuit includes a signal input circuit, an instrument amplification circuit and a voltage-to-current circuit electrically connected in order;
the signal input circuit is used for detecting a resistance value change signal and converting the resistance value change signal into a corresponding voltage signal;
preferably, the signal input circuit employs a wheatstone bridge circuit consisting of 4 resistors.
Preferably, the wheatstone bridge circuit is comprised of resistors Ra, rb, rc and Rd.
Preferably, the output standard current signal magnitude can be adjusted by adjusting the wheatstone bridge circuit resistance magnitude.
Preferably, the resistance of the wheatstone bridge is adjusted to an output current of 4ma when no pressure signal is input, and is only required to be 20ma when the pressure full range is calibrated.
Preferably, the instrument amplifying circuit adopts a three-operational amplifier instrument amplifying circuit for amplifying the voltage signal, and has a high common mode rejection ratio, and the amplifying gain is as follows:
preferably, the voltage-to-current circuit adopts a triode constant current source circuit for converting the amplified voltage signal into a standard current signal, and the triode constant current source circuit comprises: the operational amplifier, the triode and 2 resistors; the collector of the triode is connected with a first resistor R2, and the emitter is connected with a second resistor R10; the output end of the operational amplifier is connected with the base electrode of the triode, the reverse input end of the operational amplifier is connected with the second resistor R10 and then grounded, and the homodromous input end of the operational amplifier is connected with the amplifying circuit of the three operational amplifiers.
Preferably, the voltage at the same directional input terminal of the operational amplifier is equal to the voltage at the opposite directional input terminal, and the emitter current of the triode is equal to the collector current.
Preferably, the relationship between the input voltage signal and the output current signal is:
wherein U is i0 -U i1 Represented as a differential signal output by a wheatstone bridge circuit, which is a voltage signal into which a change in pressure value is converted.
The liquid level display module is used for receiving the standard current signal and displaying the measured liquid level data.
Preferably, the switching circuit is connected with the liquid level display module through a signal transmission line.
Preferably, the liquid level display device further comprises a power supply module for supplying power to the diffused silicon pressure sensor, the conversion circuit and the liquid level display module.
As shown in fig. 3, another preferred embodiment of the present utility model discloses a liquid level measurement assembly application scenario.
The method comprises the steps that a diffusion silicon pressure sensor 2 is arranged in a PVC pipeline 1, sealing treatment is adopted in a connecting link to prevent air leakage, so that signal acquisition precision is improved, the PVC pipeline 1 is inserted into a sewage tank 9 of a liquid level to be measured, air pressure generated in the PVC pipeline 1 is transmitted to the diffusion silicon pressure sensor 2 through a pipeline, an internal resistance value changes after the diffusion silicon pressure sensor 2 receives a pressure signal, the corresponding resistance value changes are detected through a conversion circuit 3 and converted into corresponding standard current signals, the standard current signals are transmitted to a liquid level display module 5 through a signal transmission line 4, the liquid level display module 5 displays test liquid level data in real time, the standard current signals are transmitted to a controller 6 through the liquid level display module 5, the controller 6 converts the standard current signals into voltage signals and transmits the voltage signals to a micro-control unit 7, the micro-control unit 7 compares the acquired liquid level height with a preset liquid level height, and when the air pressure is larger than the preset liquid level height, the micro-control unit 7 controls a water pump 8 to start up through the controller 6, and accordingly real-time display of liquid level measurement data of the sewage tank and automatic regulation and control of the liquid level height are achieved.
The controller is usually arranged at a place far away from the sewage pool, adopts 4-20ma current signals for long-distance transmission, is not easy to distort and interfere, realizes long-distance stable transmission of collected signals, and enables the collected and measured liquid level value to be more accurate.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fluid level measurement assembly, comprising: the device comprises a diffusion silicon pressure sensor, a conversion circuit and a liquid level display module;
the diffusion silicon pressure sensor is connected with the conversion circuit, and the conversion circuit is connected with the liquid level display module;
the diffusion silicon pressure sensor is used for collecting pressure signals and generating corresponding resistance value change signals based on the pressure signals;
the conversion circuit is used for detecting the resistance value change signal and converting the resistance value change signal into a corresponding voltage signal, amplifying the voltage signal, converting the amplified voltage signal into a standard current signal, and sending the standard current signal to the liquid level display module;
the liquid level display module is used for receiving the standard current signal and displaying measured liquid level data.
2. The fluid level gauge assembly of claim 1, wherein the switching circuit comprises a signal input circuit, an instrumentation amplifier circuit, and a voltage to current circuit electrically connected in sequence;
the signal input circuit is used for detecting the resistance value change signal and converting the resistance value change signal into a corresponding voltage signal;
the meter amplifying circuit is used for amplifying the voltage signal;
the voltage-to-current circuit is used for converting the amplified voltage signal into a standard current signal.
3. A fluid level gauge assembly according to claim 2, wherein the signal input circuit employs a wheatstone bridge circuit consisting of 4 resistors.
4. A fluid level gauge assembly according to claim 2, wherein the instrumentation amplifier circuit employs a three op amp instrumentation amplifier circuit.
5. The fluid level measurement assembly of claim 4, wherein the voltage to current circuit comprises a triode constant current source circuit comprising: the operational amplifier, the triode and 2 resistors; the collector of the triode is connected with a first resistor, and the emitter is connected with a second resistor; the output end of the operational amplifier is connected with the base electrode of the triode, the reverse input end of the operational amplifier is connected with the second resistor and then grounded, and the homodromous input end of the operational amplifier is connected with the amplifying circuit of the three operational amplifiers.
6. A fluid level gauge assembly as defined in claim 5, wherein the op-amp has a common input voltage equal to a reverse input voltage and the triode has an emitter current equal to a collector current.
7. A fluid level gauge assembly as defined in claim 3, wherein said standard current signal magnitude is adjusted by adjusting said wheatstone bridge circuit resistance magnitude.
8. A fluid level gauge assembly as defined in claim 1, wherein the diffused silicon pressure sensor is comprised of 316 stainless steel.
9. The fluid level measurement assembly of claim 1, further comprising a power module for powering the diffused silicon pressure sensor, the conversion circuit, and the fluid level display module.
10. The fluid level gauge assembly of claim 1, wherein the switching circuit is connected to the fluid level display module via a signal transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321344665.5U CN219798478U (en) | 2023-05-30 | 2023-05-30 | Liquid level measurement assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321344665.5U CN219798478U (en) | 2023-05-30 | 2023-05-30 | Liquid level measurement assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219798478U true CN219798478U (en) | 2023-10-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321344665.5U Active CN219798478U (en) | 2023-05-30 | 2023-05-30 | Liquid level measurement assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219798478U (en) |
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2023
- 2023-05-30 CN CN202321344665.5U patent/CN219798478U/en active Active
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