CN206281737U - Wireless resonant formula digital densimeter - Google Patents
Wireless resonant formula digital densimeter Download PDFInfo
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- CN206281737U CN206281737U CN201621433995.1U CN201621433995U CN206281737U CN 206281737 U CN206281737 U CN 206281737U CN 201621433995 U CN201621433995 U CN 201621433995U CN 206281737 U CN206281737 U CN 206281737U
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Abstract
Wireless resonant formula digital densimeter, including main computer unit and measurement sensing unit, the main computer unit includes main control singlechip chip, wave generator circuit, operational amplification circuit, temperature correction circuit, radio transmitter, storage circuit, display circuit, button inputting circuits, wireless transmission antenna, LCDs and button, and the measurement sensing unit includes piezoelectric ceramics resonator A and B, temperature sensor；Using piezoelectric ceramics direct piezoelectric effect, inverse piezoelectric effect technology, data quantitative analysis is carried out in the change of different densities liquid lower frequency；Using singlechip technology, the interaction of wireless data is realized, communicated；Temperature correction is carried out to liquid using digital temperature sensor；The convenient all kinds of parameter values of display of LCDs, are easily operated, and can be transferred data on night shift room computer by wireless transmission by button.
Description
Technical field
The utility model is related to liquid densimeter, more particularly to wireless resonant formula digital densimeter.
Background technology
Liquid densimeter of the prior art, the glass pipe type of traditional many uses, relative digitlization is wide variety of
For today, unitary function, it is impossible to store, operation is inconvenient, carries, using all very inconvenient.
Using resonant element the sensor that tested parameter transform is frequency signal, also known as frequency type sensor.When tested
When parameter changes, the eigentone of vibrating elements changes therewith, by corresponding measuring circuit, so that it may obtain and quilt
Survey parameter into the electric signal of certain relation.Since the seventies resonant transducer electronic technology, measuring technology, computing technique and
Developed rapidly on the basis of semiconductor integrated circuit technology.Its advantage is small volume, lightweight, compact conformation, resolution ratio
High, high precision and data transfer of being easy to, treatment and storage etc..By the difference of resonant element, resonant transducer can be divided into and shake
String formula, vibration cylinder type, vibration beam type, diaphragm-vibrating type and piezo-electric resonance type etc..Resonant transducer is mainly used in measuring pressure, is also used for surveying
Amount torque, density, acceleration and temperature etc..
Existing liquid densimeter is mostly made of vibration tube, vibrating diaphragm or tuning fork, publication number：The China of CN1439870A is specially
Profit, " using the resonant mode densitometer of longitudinal vibration mode " employs the hollow and thin-walled pipe by elastic alloy making as resonance
Device, winds two groups of coils as vibrator and vibration pickup on the resonator.
Piezoelectric ceramics is can be by mechanical energy and the informational function ceramic material of the mutual phase transformation of electric energy-piezo-electric effect, piezoelectricity
Ceramics, also with dielectricity, elasticity etc., have been widely used in medical imaging, sonic transducer, sound transducing in addition to piezoelectricity
Device, ultrasonic motor etc..Piezoelectric ceramics under mechanical stress effect, causes the relative displacement of internal positive and negative charge center using its material
And polarize, cause the end surfaces of material two the opposite bound charge of symbol i.e. piezo-electric effect occur and make, with sensitivity
Characteristic.
The content of the invention
In order to solve above-mentioned technical problem, the utility model provides wireless resonant formula digital densimeter, using piezoelectricity
Ceramic direct piezoelectric effect, inverse piezoelectric effect technology, data quantitative analysis is carried out in the change of different densities liquid lower frequency；Using list
Piece machine technology, realizes the interaction of wireless data, communication.
In order to achieve the above object, the utility model is realized using following technical scheme：
Wireless resonant formula digital densimeter, including main computer unit and measurement sensing unit, the main computer unit include master control
Singlechip chip, wave generator circuit, operational amplification circuit, temperature correction circuit, radio transmitter, storage circuit, display
Circuit, button inputting circuits, wireless transmission antenna, LCDs and button, the measurement sensing unit include piezoelectric ceramics
Resonator A and B, temperature sensor；
The main control singlechip chip connects the pressure of measurement sensing unit by wave generator circuit and operational amplification circuit
Electroceramics resonator A, produces vibration；
The piezoelectric ceramics resonator B and piezoelectric ceramics resonator A produces resonance, vibration signal to pass through operational amplification circuit
It is sent to main control singlechip chip；
The main control singlechip chip connects wireless transmission antenna by radio transmitter；
The main control singlechip chip connects LCDs by display circuit；
The main control singlechip chip connects button by button inputting circuits；
The main control singlechip chip also connects the temperature sensor in measurement sensing unit by temperature correction circuit.
The piezoelectric ceramics resonator A and B is installed on inside vibrating mechanism, using 12 groups of piezoelectric ceramic pieces parallel connections, radially
Vibration mode, piezoelectric ceramics resonator A and B are connected by shielded cable with main computer unit.
Temperature sensor in the measurement sensing unit is DS18B20 type digital temperature chips, is encapsulated in measurement sensing
Inside the inner cylinder of unit, it is connected with main computer unit by shielded cable.
The main control singlechip chip model is STC15F2K60S2.
The wave generator circuit chip model is AD9835.
The operational amplification circuit chip model is OPA1664.
The radio transmitter chip model is CC1101.
The display circuit chip model is LCD1602.
The storage circuit chip model is W25Q64.
Compared with prior art, the beneficial effects of the utility model are：
The utility model be convenient for carrying, wireless digital liquid densimeter easy to use, using piezoelectric ceramics malleation
Electrical effect, inverse piezoelectric effect technology, data quantitative analysis is carried out in the change of different densities liquid lower frequency；Using single-chip microcomputer skill
Art, realizes the interaction of wireless data, communication；Temperature correction is carried out to liquid using digital temperature sensor；LCDs side
Just all kinds of parameter values are shown, is easily operated by button, and can transferred data to by wireless transmission on duty
On the computer of room.
Brief description of the drawings
Fig. 1 is product schematic diagram of the present utility model；
Fig. 2 is electrical block diagram of the present utility model；
Fig. 3 is piezoelectric ceramic piece structure chart of the present utility model.
Wherein, 1- piezoelectric ceramic pieces 2- leads.
Specific embodiment
The specific embodiment that the utility model is provided is described in detail below in conjunction with accompanying drawing.
As shown in Figure 1, 2, wireless resonant formula digital densimeter, including main computer unit and measurement sensing unit, the main frame
Unit includes main control singlechip chip, wave generator circuit, operational amplification circuit, temperature correction circuit, radio transmitter, deposits
Storing up electricity road, display circuit, button inputting circuits, wireless transmission antenna, LCDs and button, the measurement sensing unit bag
A containing piezoelectric ceramics resonator and B, temperature sensor；
The main control singlechip chip connects the pressure of measurement sensing unit by wave generator circuit and operational amplification circuit
Electroceramics resonator A, produces vibration；
The piezoelectric ceramics resonator B and piezoelectric ceramics resonator A produces resonance, vibration signal to pass through operational amplification circuit
It is sent to main control singlechip chip；
The main control singlechip chip connects wireless transmission antenna by radio transmitter；
The main control singlechip chip connects LCDs by display circuit；
The main control singlechip chip connects button by button inputting circuits；
The main control singlechip chip also connects the temperature sensor in measurement sensing unit by temperature correction circuit.
The piezoelectric ceramics resonator A and B is installed on inside vibrating mechanism, using 12 groups of piezoelectric ceramic pieces parallel connections, radially
Vibration mode, piezoelectric ceramics resonator A and B are connected by shielded cable with main computer unit.
Temperature sensor in the measurement sensing unit is DS18B20 type digital temperature chips, is encapsulated in measurement sensing
Inside the inner cylinder of unit, it is connected with main computer unit by shielded cable.
The main control singlechip chip model is STC15F2K60S2.
The wave generator circuit chip model is AD9835.
The operational amplification circuit chip model is OPA1664.
The radio transmitter chip model is CC1101.
The display circuit chip model is LCD1602.
The storage circuit chip model is W25Q64.
As shown in figure 3, piezoelectric ceramics resonator includes piezoelectric ceramic piece 1 and its lead 2.
During measurement density, measurement sensing unit is completely submerged in liquid, stands 30S, direct measurement fluid density and temperature
Degree, hand-held main computer unit opens data wire, and measurement data is directly observed by handheld unit, reads data, presses emission key,
Data storage is simultaneously uploaded to night shift room computer by wireless transmission.
The single-chip microcomputer of main computer unit uses STC15F2K60S2, is worked under battery powered state；MCU driving DDS
Chip AD9835；The digitization frequencies synthesis chip, produces AC sine signal, and this signal is through operational amplifier OPA16664
Amplify, AC sine wave signal is exported, on the piezoelectric ceramic piece A of signal direct sending sensing unit.Due to inverse piezoelectric effect, piezoelectricity pottery
Ceramics A, starts vibration.Vibration frequency reaches maximum amplitude in the presence of resonance cylinder.
In measurement sensing unit, also piezoelectric ceramic piece B, due to direct piezoelectric effect, makes B two ends generate small mV and believes
Number, the sinusoidal signal and fluid to be measured collective effect that frequency and the main frame of this signal intensity send are relevant, according to different liquid
Body mV signals at different temperature amplify through operational amplifier gives single-chip microcomputer reading.
Under different temperature conditionss, especially oily density is greatly influenced by temperature liquid, using DS1B20, is encapsulated in
Measure inside the inner cylinder of sensing unit, measure the temperature of a liquid, measurement result is modified.
Combined standard measurement result, after measurement mass data is obtained, sets up conventional tables of data, using look-up table to not
Under synthermal, density is calculated.
The display of measurement result, preserves, and uploads：Main computer unit, plate is loaded with LCD1602 display datas, FLASH memory
W25Q64 preserves data, and clock chip AT24C04 holding times, wireless module CC1101 uploads data.
Above example is implemented under premised on technical solutions of the utility model, gives detailed implementation method
With specific operating process, but protection domain of the present utility model is not limited to the above embodiments.Side used in above-described embodiment
Method is conventional method unless otherwise instructed.
Claims (9)
1. wireless resonant formula digital densimeter, including main computer unit and measurement sensing unit, it is characterised in that the main computer unit
Including main control singlechip chip, wave generator circuit, operational amplification circuit, temperature correction circuit, radio transmitter, storage electricity
Road, display circuit, button inputting circuits, wireless transmission antenna, LCDs and button, the measurement sensing unit include pressure
Electroceramics resonator A and B, temperature sensor；
The main control singlechip chip is made pottery by the piezoelectricity that wave generator circuit and operational amplification circuit connect measurement sensing unit
Porcelain resonator A, produces vibration；
The piezoelectric ceramics resonator B and piezoelectric ceramics resonator A produces resonance, vibration signal to be transmitted by operational amplification circuit
To main control singlechip chip；
The main control singlechip chip connects wireless transmission antenna by radio transmitter；
The main control singlechip chip connects LCDs by display circuit；
The main control singlechip chip connects button by button inputting circuits；
The main control singlechip chip also connects the temperature sensor in measurement sensing unit by temperature correction circuit.
2. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the piezoelectric ceramics resonator A
It is installed on inside vibrating mechanism with B, using 12 groups of piezoelectric ceramic pieces parallel connections, radial vibration modes, piezoelectric ceramics resonator A and B
It is connected with main computer unit by shielded cable.
3. wireless resonant formula digital densimeter according to claim 1, it is characterised in that in the measurement sensing unit
Temperature sensor be DS18B20 type digital temperature chips, be encapsulated in measurement sensing unit inner cylinder inside, by shielded cable with
Main computer unit is connected.
4. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the main control singlechip is chip-shaped
Number be STC15F2K60S2.
5. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the wave generator circuit chip
Model AD9835.
6. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the operational amplification circuit chip
Model OPA1664.
7. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the radio transmitter chip
Model CC1101.
8. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the display circuit chip model
It is LCD1602.
9. wireless resonant formula digital densimeter according to claim 1, it is characterised in that the storage circuit chip model
It is W25Q64.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621433995.1U CN206281737U (en) | 2016-12-23 | 2016-12-23 | Wireless resonant formula digital densimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621433995.1U CN206281737U (en) | 2016-12-23 | 2016-12-23 | Wireless resonant formula digital densimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281737U true CN206281737U (en) | 2017-06-27 |
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ID=59071188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621433995.1U Active CN206281737U (en) | 2016-12-23 | 2016-12-23 | Wireless resonant formula digital densimeter |
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| Country | Link |
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| CN (1) | CN206281737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2832875A1 (en) * | 2019-12-11 | 2021-06-11 | Vergara Domingo Corredor | Continuous measurement digital density meter. (Machine-translation by Google Translate, not legally binding) |
-
2016
- 2016-12-23 CN CN201621433995.1U patent/CN206281737U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2832875A1 (en) * | 2019-12-11 | 2021-06-11 | Vergara Domingo Corredor | Continuous measurement digital density meter. (Machine-translation by Google Translate, not legally binding) |
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