CN209841608U - Irrigation water viscosity coefficient detection device based on magnetostrictive displacement sensor - Google Patents
Irrigation water viscosity coefficient detection device based on magnetostrictive displacement sensor Download PDFInfo
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- CN209841608U CN209841608U CN201920489319.3U CN201920489319U CN209841608U CN 209841608 U CN209841608 U CN 209841608U CN 201920489319 U CN201920489319 U CN 201920489319U CN 209841608 U CN209841608 U CN 209841608U
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Abstract
Irrigation water viscosity coefficient detection device based on magnetostrictive displacement sensor belongs to the viscosity coefficient detection technical field of liquid, including triangle iron stand platform, magnetostrictive displacement sensor, temperature sensor, graduated flask, pressure sensor and data processing and display device. The utility model discloses in be equipped with temperature sensor and pressure sensor measurable quantity temperature and density, consider both to experiment measuring result's influence, further revise the experimental result, the accuracy improves greatly. The limitation is greatly reduced, the metal probe rod of the magnetostrictive displacement sensor can be measured after being immersed into liquid for a certain depth, and any place of any liquid can be measured as long as the condition is met. Compared with pulse signals, the magnetostrictive displacement sensor outputs continuous signals, and has the advantages of stability, high response speed, high precision, good transportability and easy connection with a data processing and display device.
Description
Technical Field
The utility model belongs to the technical field of irrigate the water viscosity coefficient and detect, especially involve a based on magnetostrictive displacement sensor irrigates water viscosity coefficient detection device.
Background
The increasingly sharp acceleration of the contradiction between water resource supply and demand promotes the comprehensive reform scheme of the water price of the government agriculture. In 2016, the state department issues a plurality of suggestions about promoting the comprehensive innovation of agricultural water price, wherein the proposal is to perfect the agricultural irrigation water metering facility, accelerate the construction of a water supply metering system and realize the metering water supply of a bucket opening and below in all the major projects of large and medium irrigation areas. The charging according to the prescription of the water used in the irrigation district is beneficial to promoting the scientific and reasonable utilization of water resources and improving the efficiency of agricultural water use, and the research and development of scientific and practical water quantity metering facilities matched with the charging are key links for realizing the water-saving target of the irrigation district. In the research and development of irrigation area water quantity metering facilities, when a mathematical model is constructed through numerical simulation software, the viscosity coefficient of irrigation water needs to be accurately input, and the parameter is very important for ensuring the calculation accuracy of the mathematical model and the reliability of research results.
Viscosity coefficient is an important physical quantity that describes the nature of friction in a liquid. It characterizes the ability of a liquid to resist deformation, and is only manifested when there is relative motion in the liquid. The research and the determination of the viscosity coefficient of the liquid have important roles not only in the research of material science, but also in engineering technology and other fields. The material has great contribution in the fields of fluid mechanics, chemical principles and the like, and the disciplines are closely related to the viscosity coefficient from beginning to end. Measurement of the viscosity coefficient is also required when carrying out the numerical simulation of the measuring tank in the hydraulic engineering field. Currently, research results in this field are patents of wu bin et al of the university of beijing industry, the patent application number of which is 201210248592.X, and the patent name of which is a liquid viscosity coefficient detection device and method based on ultrasonic guided waves. This patent has the following disadvantages: 1. the output signal is a pulse signal, and the response speed is slow and not accurate and stable enough. 2. A plurality of detection devices can not realize automatic detection, the operation is complicated, and the devices can not directly measure liquid parameters closely related to the liquid viscosity coefficient, such as the physical parameters of the liquid, such as the density and the like. 3. The frequency of the signal is too high, which causes signal drift and reduces the stability of the device. 4. The length of the probe rod of the device is as long as 1 meter, and the device is clumsy.
Therefore, there is a need in the art for a new solution to solve this problem.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the detection device for the viscosity coefficient of the irrigation water based on the magnetostrictive displacement sensor is used for solving the technical problems that a liquid viscosity coefficient detection method using ultrasonic guided waves in the prior art is slow in response speed, complex in operation, poor in device stability and the like.
The irrigation water viscosity coefficient detection device based on the magnetostrictive displacement sensor comprises a triangular iron stand, the magnetostrictive displacement sensor, a temperature sensor, a measuring cylinder, a pressure sensor and a data processing and displaying device, wherein a permanent magnet base is arranged on a base on one side of the triangular iron stand, and a support of the triangular iron stand is movably connected with the upper part of the magnetostrictive displacement sensor; a tray is fixedly installed on the upper part of the permanent magnet base, and a pressure sensor is arranged between the permanent magnet base and the tray; the measuring cylinder is placed on the upper part of the tray, and liquid to be measured is contained in the measuring cylinder; a metal probe rod of the magnetostrictive displacement sensor extends into liquid to be measured, and a permanent magnet magnetic ring is arranged on the metal probe rod; the temperature sensor is placed in the liquid to be measured; the data processing and displaying device comprises a single chip microcomputer, a weight transmitter, a power supply module and a displaying device, and is respectively connected with the magnetostrictive displacement sensor, the temperature sensor and the pressure sensor; the single chip microcomputer is respectively connected with the weight transmitter, the power supply module and the display device.
And the support of the triangular iron stand is provided with scale marks.
The data processing and displaying device is provided with a main power line, a power indicator light, a data transmission port, a magnetostrictive displacement sensor data transmission bus, a temperature sensor data transmission bus and a pressure sensor data transmission bus.
The display device is an LCD1602 liquid crystal display.
The power supply module is a switching power supply converting 220V alternating current into 24V direct current.
The singlechip is an Arduino UNO type singlechip.
The liquid to be detected is irrigation water.
Through the above design scheme, the utility model discloses following beneficial effect can be brought:
the utility model discloses based on magnetostrictive displacement sensor to detect liquid energy attenuation coefficient and for main thinking, make liquid viscosity coefficient detection device. The magnetostrictive displacement sensor collects signals in a mode of immersing in liquid, the collected signals are transmitted to a data processing and displaying device for data processing for better measuring results, an LCD (liquid crystal display) screen is equipped for real-time digital display, a pressure sensor is arranged for ensuring the correctness of the detection results, and a temperature sensor detects the temperature and the density, so that the experimental results are more accurate, and automatic display and data display are realized through the LCD screen. The magnetostrictive displacement sensor outputs continuous voltage signals and has the advantages of accurate measurement, stable signals and the like.
The utility model has the advantages of four points:
1. the temperature sensor and the pressure sensor are arranged in the device to measure temperature and density, the influence of the temperature sensor and the pressure sensor on the experimental measurement result is considered, the experimental result is further corrected, and the accuracy is greatly improved.
2. The limitation is greatly reduced, and the metal feeler lever of the magnetostrictive displacement sensor can be measured after entering liquid for a certain depth, so long as the condition is met, the metal feeler lever not only can be used for measuring irrigation water, but also can be used for measuring any liquid at any place.
3. Compared with pulse signals, the magnetostrictive displacement sensor outputs continuous signals, and has the advantages of stability, high response speed, high precision, good transportability and easy connection with a data processing and display device.
4. The device has good portability and is easy to be connected with 21 Arduino.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is the utility model discloses based on magnetostrictive displacement sensor irrigation water viscosity coefficient detection device's schematic structure.
Fig. 2 is the utility model discloses data processing and display device's block diagram among the magnetostrictive displacement sensor irrigation water viscosity coefficient detection device.
Fig. 3 is the utility model discloses based on magnetostrictive displacement sensor irrigates water viscosity coefficient detection device in magnetostrictive displacement sensor's schematic diagram.
Fig. 4 is the utility model discloses based on the deformation enlargements of ripples seal wire among magnetostrictive displacement sensor irrigation water viscosity coefficient detection device.
Fig. 5 is the utility model discloses data processing and display device's data processing flow block diagram among the magnetostrictive displacement sensor irrigation water viscosity coefficient detection device.
Fig. 6 is the signal diagram in the irrigation water that the magnetostrictive displacement sensor detected in the embodiment of the magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device of the present invention.
Fig. 7 is a signal diagram in the air that the magnetostrictive displacement sensor detected in the embodiment of the magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device of the present invention.
Fig. 8 is a signal diagram of a temperature sensor in an embodiment of the device for detecting viscosity coefficient of irrigation water based on a magnetostrictive displacement sensor.
Fig. 9 is a signal diagram of a pressure sensor in an embodiment of the device for detecting viscosity coefficient of irrigation water based on a magnetostrictive displacement sensor.
In the figure, the device comprises a 1-triangular iron stand, a 2-magnetostrictive displacement sensor, a 3-temperature sensor, a 4-measuring cylinder, a 5-pressure sensor, a 6-data processing and displaying device, a 7-tray, an 8-total power line, a 9-power indicator lamp, a 10-data transmission port, an 11-magnetostrictive displacement sensor data transmission bus, a 12-temperature sensor data transmission bus, a 13-pressure sensor data transmission bus, a 14-sensor electronic bin, a 15-magnetic ring, a 16-damper, a 17-waveguide wire, an 18-power anode, a 19-power cathode, a 20-signal output anode, a 21-signal output cathode and a 22-shell ground wire.
Detailed Description
As shown in the figure, the irrigation water viscosity coefficient detection device based on the magnetostrictive displacement sensor comprises a triangular iron stand 1, a magnetostrictive displacement sensor 2, a temperature sensor 3, a measuring cylinder 4, a pressure sensor 5 and a data processing and displaying device 6, wherein a base on one side of the triangular iron stand 1 is a permanent magnet base, and a support of the triangular iron stand 1 is movably connected with the upper part of the magnetostrictive displacement sensor 2; a tray 7 is fixedly installed on the upper portion of the permanent magnet base, and a pressure sensor 5 is arranged between the permanent magnet base and the tray 7; the measuring cylinder 4 is placed on the upper part of the tray 7, and the measuring cylinder 4 is filled with liquid to be measured; a metal probe rod of the magnetostrictive displacement sensor 2 extends into liquid to be measured, and a permanent magnet magnetic ring is arranged on the metal probe rod; the temperature sensor 3 is placed in the liquid to be measured; the data processing and display device 6 comprises a single chip microcomputer, a weight transmitter, a power supply module and a display device, a main power line 8, a power indicator lamp 9, a data transmission port 10, a data transmission bus 11 of a magnetostrictive displacement sensor, a data transmission bus 12 of a temperature sensor and a data transmission bus 13 of a pressure sensor are arranged on the data processing and display device 6, the data processing and display device 6 is connected with a computer through the data transmission port 10, the data processing and display device 6 is connected with the magnetostrictive displacement sensor 2 through the data transmission bus 11 of the magnetostrictive displacement sensor, the data processing and display device 6 is connected with the temperature sensor 3 through the data transmission bus 12 of the temperature sensor, and the data processing and display device 6 is connected with the pressure sensor 5 through the data transmission bus 13 of the pressure sensor; the single chip microcomputer is respectively connected with the weight transmitter, the power supply module and the display device. The data processing and display device 6 lays a foundation for realizing two functions of data processing and real-time display, the single chip microcomputer converts all analog signals into digital signals and is connected to display devices such as an LCD1602 liquid crystal display screen and the like for real-time display, meanwhile, the data can be transmitted to a computer through the data transmission port 10, and waveform and specific values of the data can be conveniently and clearly viewed through MATLAB.
And scale marks are arranged on the support of the triangular iron stand 1.
The display device is an LCD1602 liquid crystal display.
The power supply module is a switching power supply converting 220V alternating current into 24V direct current.
The singlechip is an Arduino UNO type singlechip.
The detection method of the viscosity coefficient of the irrigation water based on the magnetostrictive displacement sensor and the detection device of the viscosity coefficient of the irrigation water based on the magnetostrictive displacement sensor comprise the following steps which are sequentially carried out,
step one, placing an empty measuring cylinder 4 on a tray 7, starting a power supply, detecting a pressure value of the empty measuring cylinder 4 by a pressure sensor 5, converting the pressure value into an empty measuring cylinder mass value by a weight transmitter and a single chip microcomputer, and storing the empty measuring cylinder mass value into the single chip microcomputer;
step two, pouring irrigation water into the measuring cylinder 4, reading the level value of the irrigation water, inputting the level value into the data processing and displaying device 6 to obtain the volume value of the irrigation water, detecting the pressure value after the irrigation water is poured by the pressure sensor 5, converting the pressure value into the quality value of the measuring cylinder and the irrigation water by the weight transmitter and the singlechip, and storing the quality value into the singlechip;
thirdly, acquiring a frequency domain amplitude of the frequency of the echo signal in the air through the magnetostrictive displacement sensor 2;
putting the magnetostrictive displacement sensor 2 into irrigation water, fixing the magnetostrictive displacement sensor by using a triangular iron stand 1, reading the numerical value of the liquid level to be measured and the numerical value of the plane where the lower bottom surface of the metal probe rod is located according to scale marks arranged on a support of the triangular iron stand 1, and obtaining the lubricating depth l of the metal probe rod by taking the difference value of the two numerical values;
fifthly, acquiring a frequency domain amplitude of the echo signal frequency in the irrigation water through the magnetostrictive displacement sensor 2;
step six, obtaining an irrigation water energy attenuation coefficient according to the obtained frequency domain amplitude of the echo signal frequency in the air, the frequency domain amplitude of the echo signal frequency in the irrigation water, the wetting depth l of the metal probe rod and a liquid attenuation coefficient calculation formula;
step seven, obtaining the quality value of the irrigation water according to the difference value of the empty measuring cylinder quality value obtained in the step one and the measuring cylinder and irrigation water quality value obtained in the step two,
obtaining the density rho of the irrigation water according to the quality value of the irrigation water and the volume value of the irrigation water obtained in the step twol；
Step eight, looking up a table according to the metal type of the metal probe rod to obtain the density rho of the metal probe rodrAnd the attribute G of the metal probe rod, and obtaining the shear wave velocity c according to a shear wave velocity formular，
The radius of the metal probe rod is measured by a screw micrometer,
the excitation frequency was measured by an oscilloscope,
according to the density of the irrigation water rholAnd density ρ of the metal proberBy the dimension-density ρ formula: ρ ═ ρl/ρrObtaining dimension-density rho;
step nine, obtaining the viscosity coefficient of the irrigation water according to a liquid viscosity coefficient formula;
and step ten, obtaining the temperature of the irrigation water through the temperature sensor 3 and keeping the temperature unchanged, repeating the step three, the step five and the step nine to obtain the viscosity coefficient of the irrigation water, and averaging the viscosity coefficient of the irrigation water, wherein the average value is the viscosity coefficient of the irrigation water at the temperature.
The liquid energy attenuation coefficient alpha is calculated according to the formula:
wherein α (f) is an energy attenuation coefficient; l is the lubricating depth of the metal probe rod; fa(f) The frequency domain amplitude is the frequency domain amplitude of the echo signal frequency in the air; ff(f) The frequency domain amplitude of the frequency in the echo signal at the immersion depth l.
The calculation formula of the liquid viscosity coefficient eta is as follows:
wherein eta is the liquid viscosity coefficient; c. CrIs the shear wave velocity; gamma is the radius of the metal probe rod; f is the excitation frequency; alpha is an energy attenuation coefficient; ρ l is the irrigation water density; ρ is dimension-density.
The basic principle is as follows:
one, magnetic striction
The magnetostriction effect is an effect that a magnetic substance undergoes a reversible change in geometric dimension due to a change in the condition of an external magnetic field during magnetization. The magnetostrictive intelligent material is a material with strong magnetostrictive effect and high magnetostrictive coefficient, namely, the material has the function of mutual conversion of electromagnetic energy and mechanical energy. Magnetostrictive materials are generally classified into two broad classes, metallic magnetostrictive materials and rare earth-iron (RFe2) giant magnetostrictive materials. The rare earth-iron (RFe2) giant magnetostrictive material has a magnetostrictive value which is much larger than that of the traditional magnetostrictive material, and has the advantages of quick mechanical response, high power density and high coupling coefficient, thereby having better application prospect in the field of intelligent materials. At present, the material is widely used in sonar systems, high-power ultrasonic devices, precise positioning control, mechanical brakes, various valves, driving devices and the like.
Two, magnetostrictive displacement sensor
The magnetostrictive displacement sensor 2 is a high-precision and wide-range sensor for measuring displacement based on the hysteresis effect, and the working principle of the magnetostrictive displacement sensor is shown in fig. 3. The inner structure of the magnetostrictive displacement sensor comprises a sensor electronic bin 14, a magnetic ring 15, a damper 16 and a waveguide wire 17, wherein a power supply anode 18 of the magnetostrictive displacement sensor 2 is a brown wire, a power supply cathode 19 of the magnetostrictive displacement sensor is a black wire, a signal output anode 20 of the magnetostrictive displacement sensor is a blue wire, a signal output cathode 21 of the magnetostrictive displacement sensor is a white wire, and a shell ground wire 22 of the magnetostrictive displacement sensor is a shielding wire. The sensor electronics cartridge 14 includes a pulse generator, a digital processing module, and a sensing element. The magnetic ring 15 is a permanent magnet magnetic ring.
When the magnetostrictive displacement sensor 2 works, an electronic component in the sensor electronic bin 14 generates an excitation pulse, the excitation pulse is transmitted at the electromagnetic wave speed along a waveguide wire 17 made of magnetostriction in the sensor, a ring-shaped magnetic field is generated in the direction perpendicular to the waveguide wire 17 and is also transmitted at the sound speed, a permanent magnet magnetic ring 15 is arranged on a metal probe rod (comprising the waveguide wire 17 and a loop lead) of the magnetostrictive displacement sensor 2, the magnetic ring 15 also has a magnetic field, the two magnetic fields are intersected to generate the magnetostriction effect, the waveguide wire 17 is deformed, simultaneously, the waveguide wire 17 generates a strain pulse in the form of mechanical vibration and is transmitted at the sound speed along the metal probe rod to two ends, one end of the strain pulse is absorbed by a damper 16, the other end of the strain pulse is detected by a detection element in the sensor electronic bin 14, the total time from the moment of the excitation pulse to the process of detecting an original, the specific position of the magnet ring 15 can be obtained. This process is continuous so that whenever the position of the magnetic ring 15 changes, a new position is quickly measured. Because the action output signal of the detection circuit is a real absolute value, and is not a signal which is proportional or needs to be amplified again, the situation that the signal drifts or changes the value does not exist, and the signal does not need to be periodically re-calibrated like other sensors.
Third, the basic principle of measuring the liquid viscosity coefficient by the magnetostrictive displacement sensor 2
After the magnetostrictive displacement sensor 2 is powered, a signal end outputs continuous signals, because the output signals are real absolute values, amplification processing is not needed, the voltage value range is 0 to +5V, the value depends on the position of the magnetic ring 15 and is a constant value, when the liquid viscosity coefficient is measured, the magnetic ring 15 needs to be fixed at a certain position on the metal probe rod within the effective working range, the metal probe rod is immersed into liquid, the magnetic ring 15 needs to be partially and completely immersed into the liquid, under the normal condition, the energy attenuation in the air is almost zero, compared with the air, the metal probe rod can diffuse around along with the liquid in the liquid so as to have energy attenuation and cause the reduction of the propagation speed, the time detected by a detection element is increased, the voltage value output by the detection element is increased, the energy attenuation coefficients of the liquids with different viscosity coefficients are different, and the voltage amplitudes under the two modes are measured, the liquid energy attenuation coefficient can be calculated by a liquid energy attenuation coefficient alpha calculation formula, the liquid viscosity coefficient can be calculated by a liquid viscosity coefficient eta calculation formula, the result can be obtained by the calculation of a single chip microcomputer, the liquid crystal display screen LCD1602 can display the result in real time, the data transmission port 10 can be connected with a computer, and the waveform and numerical value display can be conveniently realized by using MATLAB.
Fourth, data processing and display module basic principle
The magnetostrictive displacement sensor 2 and the temperature sensor 3 transmit 0-5V voltage signals to an Arduino UNO type single chip microcomputer, the magnetostrictive displacement sensor and the temperature sensor are respectively connected with ports A2 and A1 of the single chip microcomputer, the pressure sensor 5 is subjected to signal amplification processing through a weight transmitter and is also connected with a port A0 of the single chip microcomputer after processing, the single chip microcomputer converts analog signals of the three sensors into digital signals, then the digital signals are corrected and calculated, an LCD1602 liquid crystal display is used for connecting all the ports of the pressure sensor with the single chip microcomputer and displaying a measurement result, and a 220V AC-to-24V DC switching power supply is used for converting a 220V power supply into a 24V power supply which can be directly used and supplying power to the whole data processing and displaying device 6. A program flow chart of the Arduino UNO type single chip microcomputer is shown in fig. 5.
The method comprises the following specific steps:
fixing a magnetostrictive displacement sensor 2 on a triangular iron stand 1, fixing a magnetic ring 15 in a normal working area of a metal probe rod, wherein the metal probe rod extends into a measuring cylinder 4, liquid to be measured is filled into the measuring cylinder 4, the liquid level height of the measuring cylinder is fixed, a power supply module supplies power to a single chip microcomputer, excitation pulses are emitted from the inside of the magnetostrictive displacement sensor 2, the pulses are transmitted forwards along a waveguide tube at the electromagnetic wave speed, meanwhile, an annular magnetic field is generated in the direction vertical to a lead, along with the forward transmission of electromagnetic waves, the energy attenuation can be generated when the electromagnetic waves meet the liquids with different viscosity coefficients in the process, the energy attenuation degrees are different due to the different viscosity coefficients, when the magnetic fields generated by the magnetic ring 15 in the magnetostrictive displacement sensor 2 meet, the magnetostrictive phenomenon occurs, a waveguide wire 17 is extended or shortened, a strain pulse is generated, and secondary strain pulses are mechanical waves transmitted to two ends along the metal, one end of the metal probe rod is absorbed by the damper 16, and a detection signal element inside the magnetostrictive displacement sensor 2 at the other end of the metal probe rod is detected, compared with the air, the metal probe rod is propagated in the liquid and diffused to the periphery along with the liquid, so that energy attenuation exists, the propagation speed is reduced, the energy attenuation in the air is almost zero, and the values of the attenuation coefficient and the viscosity coefficient of the metal probe rod can be calculated by collecting the frequency domain amplitude of echo signal frequency in the liquid and the air.
The liquid energy attenuation coefficient alpha is calculated according to the following formula:
wherein α (f) is an energy attenuation coefficient; l is the lubricating depth of the metal probe rod; fa(f) The frequency domain amplitude is the frequency domain amplitude of the echo signal frequency in the air; ff(f) The frequency domain amplitude of the frequency in the echo signal at the immersion depth l.
The liquid viscosity coefficient eta is calculated as follows:
wherein eta is the liquid viscosity coefficient; c. CrIs the shear wave velocity;gamma is the radius of the metal probe rod; f is the excitation frequency; alpha is an energy attenuation coefficient; rholIs the density of the irrigation water; ρ is dimension-density.
Looking up a table according to the metal type of the metal probe to obtain the density rho of the metal proberAnd the attribute G of the metal probe rod, and obtaining the shear wave velocity c according to a shear wave velocity formular，
The radius of the metal probe rod is measured by a screw micrometer,
the excitation frequency was measured by an oscilloscope,
according to the density of the irrigation water rholAnd the density rho r of the metal probe rod is obtained by a dimension-density rho formula: ρ ═ ρl/ρrThe dimension-density ρ is obtained.
Example (b):
experimental contents measuring the viscosity coefficient of irrigation water
The detection method comprises the steps of capturing strain pulse signals generated when two different magnetic fields (one of the two magnetic fields is from a permanent magnet in a magnetic ring 15, and the other magnetic field is from an electronic component in a sensor electronic bin 14 and runs at sound velocity along a waveguide wire 17 made of magnetostrictive materials in the sensor) intersect, outputting the strain pulse signals in the form of electric signals after being captured by a sensing circuit of the sensor electronic bin 14, measuring different energy attenuation coefficients of different viscosity coefficients when the excitation pulses meet irrigation water with different viscosity coefficients in propagation, wherein the corresponding energy attenuation coefficients are different, and obtaining the corresponding viscosity coefficients through calculation processing.
Fig. 6 to 9 are respectively a signal diagram of irrigation water detected by the magnetostrictive displacement sensor, a signal diagram of air detected by the magnetostrictive displacement sensor, a temperature sensor signal diagram, and a pressure sensor signal diagram. The experimental data obtained by the tests are as follows:
and (3) error analysis:
a. multiple measurement is carried out to obtain an average value, and experimental errors are reduced
The average value of the measured values was 1.0643MPa.s
b. Calculating variance of viscosity coefficient
The variance value of the measured values was 2.1549 e-15. The smaller the variance value is, the more concentrated the experimental data is, which shows that the stability of the device is good and the reliability of the data is strong.
c. And (4) conclusion:
irrigation water with a density of 1000Kg/m at a temperature of 17.20 deg.C3The viscosity coefficient was 1.0643 MPa.s.
Claims (6)
1. Based on magnetostrictive displacement sensor irrigation water viscosity coefficient detection device, characterized by: the device comprises a triangular iron stand (1), a magnetostrictive displacement sensor (2), a temperature sensor (3), a measuring cylinder (4), a pressure sensor (5) and a data processing and displaying device (6), wherein a permanent magnet base is arranged on a base on one side of the triangular iron stand (1), and a support of the triangular iron stand (1) is movably connected with the upper part of the magnetostrictive displacement sensor (2); a tray (7) is fixedly installed on the upper portion of the permanent magnet base, and a pressure sensor (5) is arranged between the permanent magnet base and the tray (7); the measuring cylinder (4) is placed on the upper part of the tray (7), and the measuring cylinder (4) is filled with liquid to be measured; a metal probe rod of the magnetostrictive displacement sensor (2) extends into the liquid to be measured, and a permanent magnet magnetic ring is arranged on the metal probe rod; the temperature sensor (3) is placed in the liquid to be measured; the data processing and displaying device (6) comprises a single chip microcomputer, a weight transmitter, a power supply module and a displaying device, and the data processing and displaying device (6) is respectively connected with the magnetostrictive displacement sensor (2), the temperature sensor (3) and the pressure sensor (5); the single chip microcomputer is respectively connected with the weight transmitter, the power supply module and the display device.
2. The magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device as claimed in claim 1, wherein: and scale marks are arranged on the support of the triangular iron stand (1).
3. The magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device as claimed in claim 1, wherein: the data processing and displaying device (6) is provided with a main power line, a power indicator light, a data transmission port, a magnetostrictive displacement sensor data transmission bus, a temperature sensor data transmission bus and a pressure sensor data transmission bus.
4. The magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device as claimed in claim 1, wherein: the display device is an LCD1602 liquid crystal display.
5. The magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device as claimed in claim 1, wherein: the power supply module is a switching power supply converting 220V alternating current into 24V direct current.
6. The magnetostrictive displacement sensor-based irrigation water viscosity coefficient detection device as claimed in claim 1, wherein: the singlechip is an Arduino UNO type singlechip.
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 |