CN201740745U - Microwave concentration meter for measuring concentration based on DSP and single chip processor - Google Patents
Microwave concentration meter for measuring concentration based on DSP and single chip processor Download PDFInfo
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- CN201740745U CN201740745U CN2010202325005U CN201020232500U CN201740745U CN 201740745 U CN201740745 U CN 201740745U CN 2010202325005 U CN2010202325005 U CN 2010202325005U CN 201020232500 U CN201020232500 U CN 201020232500U CN 201740745 U CN201740745 U CN 201740745U
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Abstract
The utility model relates to a measuring instrument, in particular to a microwave concentration meter for measuring concentration based on a DSP and a single chip processor. The microwave concentration meter realizes the function of microwave concentration delay difference measurement, temperature compensation and automatic microwave signal amplitude regulation by taking the DSP and a single chip machine as core processor embedded software and has high measurement precision. The utility model has the advantages of adaptability to large temperature and concentration change and big and small calibre medium concentration measurement.
Description
Technical field
The utility model relates to a kind of surveying instrument, relates in particular to a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer.
Background technology
Densimeter is that light industry manufacturing production processes such as papermaking, food are monitored requisite measuring instrument, and the main at present densimeter that uses is cutter formula densimeter, rotary densimeter, ultrasound wave densimeter, microwave concentration meter.Wherein cutter formula densimeter, rotary densimeter are to reach the concentration testing goal according to the friction force in the mechanics principle, shearing force principle, and the defective of this densimeter is measurement of concetration scope little (sensing range is between 1.5% and 6%), be subjected to the test solution composition influence (as the concentration that can not be used for mud and suspending liquid detects); The defective of ultrasound wave densimeter then is that the bubble that easily exists in fouling and the fluid to be measured of the surface of the probe of densimeter is in the accuracy of detection that to a certain degree will influence concentration down; Microwave concentration meter has overcome the defective of above-mentioned several densimeters, has the advantages such as flow rate effect that measuring accuracy height, scope extensively, are not subjected to measured medium.
Microwave concentration meter measuring principle: the speed of travel of microwave in liquid
Wherein c is the light velocity, e is the medium specific inductive capacity, so speed of travel difference of microwave in different medium liquid, speed in aqueous medium is the slowest, mix other nonmetal medium medium velocity at water and accelerate, detect microwave can reflect this medium at the delay time of the liquid medium by certain distance concentration.Based on this principle, the basic structure of microwave concentration meter is to be full of the right both sides of measured medium pipe surface microwave emitting antenna and microwave detecting device are installed respectively, detect microwave from being transmitted into the mixed frequency signal of reception, as shown in Figure 1, the time-delay of the microwave signal of measured medium has promptly been represented in the phase deviation of mixed frequency signal, the phase differential of the mixed frequency signal of reference fluid that will be by detected mixed frequency signal of measured medium and concentration known converts concentration to, n=k* θ 1.Because the specific inductive capacity difference of medium under different temperatures of same concentration, that is to say that the phase differential that same concentration records is different under different temperatures, as shown in Figure 2 be in the 50 bore pipelines, when the change curve of measured medium temperature variation phase differential twice time the under same concentration.When if measured medium changes in temperature, Measurement Phase difference and do not consider the phase differential that compensation temperature causes only, measured value will change by display density, especially when pipe diameter becomes big, it is bigger that variation of temperature will make phase differential change, the change curve of 150 bore pipeline phase differential is also maximum to the measurement of concetration influence as shown in Figure 3.
When microwave passed through medium, the temperature variation of medium not only influenced the speed of microwave, and also had in certain decay, the especially large diameter pipeline, and attenuation is even more serious, as Fig. 2, shown in Figure 3.When microwave signal is lower than and be higher than certain limit, intermediate frequency waveform after the mixing will distort, thereby influence the measurement of circuit to phase differential, detected phase difference θ 1 and carry out temperature phase difference compensation θ 2 whether accurately, the decay control of the intermediate-freuqncy signal amplitude that receives will directly influence the concentration accuracy of detection, even directly influence the measured value of concentration, also may cause densimeter to use.Present known microwave concentration meter adopts custom circuit to the detection of phase differential, and the amplitude regulatory function of not temperature compensated and microwave signal.
The utility model content
The utility model is for overcoming the deficiencies in the prior art part, purpose is to provide a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer, employing is that the mode of core processor embedded software realizes the time-delay difference measurement of microwave concentration and temperature compensation, the automatic regulatory function of microwave signal amplitude with DSP and single-chip microcomputer, the accuracy of measurement height, have and to adapt to big temperature variation, the advantage that big concentration change, big small-bore concentration of medium are measured has successfully solved problems of the prior art.
The utility model is to achieve the above object by the following technical programs: a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer comprises and measures pipe, microwave launcher, microwave receiving device, temperature sensor, a list processing (LISP) unit; Microwave launcher, microwave receiving device is arranged on the both sides of measuring pipe respectively accordingly, temperature sensor is arranged on the inside of measuring pipe, microwave launcher, microwave receiving device is connected with a list processing (LISP) unit by concentric cable, temperature sensor is connected with a list processing (LISP) unit, also include secondary list processing (LISP) unit, mixed frequency signal and measured medium temperature signal digital sample that a described list processing (LISP) unit transmits and receives microwave, and pass to secondary list processing (LISP) unit with 485 communication modes by communication cable, secondary list processing (LISP) unit calculates the phase differential and the temperature phase compensation value of mixed frequency signal, by formula concentration=K* (θ 1-θ 2)+B calculates measured medium concentration value and demonstration.
As preferably, a described list processing (LISP) unit comprises dsp processor, voltage control module, DA module, microwave signal source module, amplifier I, amplifier II, signal attenuation module, frequency mixer, amplifier III, electronic switch module, A/D modular converter, communication module I; Voltage control module, the A/D modular converter, communication module I links to each other with dsp processor respectively, voltage control module links to each other with the DA module, the DA module links to each other with the microwave signal source module, the microwave signal source module links to each other with amplifier I, amplifier I links to each other with microwave launcher, microwave is through tested pipeline, receive by microwave receiving device, microwave receiving device links to each other with amplifier II, amplifier II, signal attenuation module, frequency mixer, amplifier III, electronic switch module is continuous in proper order, temperature sensor links to each other with electronic switch module, and electronic switch module links to each other with the A/D modular converter.
As preferably, described secondary list processing (LISP) unit comprises processor of single chip computer, communication module II, memory module, keyboard load module, display module, valve position signal output module, concentration value signal output module; Communication module II, memory module, keyboard load module, display module, valve position signal output module, concentration value signal output module link to each other with processor of single chip computer respectively, and communication module II links to each other with communication module I.
As preferably, described dsp processor adopts TMS320F2812.
As preferably, processor of single chip computer adopts MSP430F149.
The beneficial effects of the utility model: the utility model overcomes above-mentioned microwave concentration meter defective exactly, employing is that the method for core processor embedded software realizes the time-delay difference measurement of microwave concentration and temperature compensation, the automatic regulatory function of microwave signal amplitude with DSP and single-chip microcomputer, the accuracy of measurement height, have and to adapt to big temperature variation, the advantage that big concentration change, big small-bore concentration of medium are measured.
Description of drawings
Fig. 1 be described in the background technology for detecting microwave from being transmitted into the mixed frequency signal of acceptance,
Fig. 2 is as the measured medium variation of the every variation two degree phase differential of temperature in the 50 bore pipelines (53 degree～35 degree) figure under same concentration in the background technology;
Fig. 3 is as the measured medium variation of the every variation two degree phase differential of temperature in the 150 bore pipelines (53 degree～35 degree) figure under same concentration in the background technology;
Fig. 4 is a microwave concentration meter basic structure synoptic diagram;
Fig. 5 is a microwave concentration meter circuit working schematic diagram;
Fig. 6 is that microwave concentration meter is demarcated process flow diagram;
Fig. 7 is automatic empty pipe condition decision flow chart;
Fig. 8 is full of medium and the microwave oscillogram when the blank pipe in the pipeline.
Embodiment
Embodiment 1: below in conjunction with specific embodiment the utility model is described further, but protection domain of the present utility model is not limited in this:
A kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer comprises and measures pipe 1, microwave launcher 3, microwave receiving device 4, temperature sensor 2, list processing (LISP) unit 7, secondary list processing (LISP) unit 8; Microwave launcher 3, microwave receiving device 4 is arranged on the both sides of measuring pipe 1 respectively accordingly, temperature sensor 2 is arranged on the inside of measuring pipe 1, microwave launcher 3, microwave receiving device 4 is connected with a list processing (LISP) unit 7 by concentric cable 5, temperature sensor 2 is connected with a list processing (LISP) unit 7, mixed frequency signal and measured medium temperature signal digital sample that the 7 pairs of microwaves in a described list processing (LISP) unit transmit and receive, and pass to secondary list processing (LISP) unit 8 with 485 communication modes by communication cable 9, secondary list processing (LISP) unit 8 calculates the phase differential and the temperature phase compensation value of mixed frequency signal, by formula concentration=K* (θ 1-θ 2)+B calculates measured medium concentration value and demonstration.
A described list processing (LISP) unit 7 comprises dsp processor 10, voltage control module 17, DA module 18, microwave signal source module 12, amplifier I19, amplifier II20, signal attenuation module 11, frequency mixer 13, amplifier III21, electronic switch module 15, A/D modular converter 16, communication module I14; Voltage control module 17, A/D modular converter 16, communication module I14 links to each other with dsp processor 10 respectively, voltage control module 17 links to each other with DA module 18, DA module 18 links to each other with microwave signal source module 12, microwave signal source module 12 links to each other with amplifier I19, amplifier I19 links to each other with microwave launcher 3, microwave is through tested pipeline, receive by microwave receiving device 4, microwave receiving device 4 links to each other with amplifier II20, amplifier II20, signal attenuation module 11, frequency mixer 13, amplifier III21, electronic switch module 15 orders link to each other, temperature sensor 2 links to each other with electronic switch module 15, and electronic switch module 15 links to each other with A/D modular converter 16.
Described secondary list processing (LISP) unit 8 comprises processor of single chip computer 22, communication module II23, memory module 24, keyboard load module 25, display module 26, valve position signal output module 28, concentration value signal output module 27; Communication module II23, memory module 24, keyboard load module 25, display module 26, valve position signal output module 28, concentration value signal output module 27 link to each other with processor of single chip computer 22 respectively, and communication module II23 links to each other with communication module I14.
Described dsp processor adopts TMS320F2812.
Processor of single chip computer adopts MSP430F149.
The concrete course of work is as follows: microwave concentration meter comprises measures pipe 1, microwave launcher 3, microwave receiving device 4, temperature sensor 2, list processing (LISP) unit 7, secondary list processing (LISP) unit 8, concentric cable 5, lead 6 and a communication cable 9.Measuring pipe 1 is the circulation duct of measured medium, it is one section stainless steel pipes, one time list processing (LISP) unit 7 produces microwave signal, by concentric cable 5, by microwave launcher 3 launched microwave signals, microwave receiving device 4 receives microwave signal it is carried out Frequency mixing processing by the frequency mixer 13 that concentric cable 5 is connected to a list processing (LISP) unit 7, obtains one group of intermediate-freuqncy signal, as Fig. 5.After the electronic switch module 15 of a table unit 7 is switched A/D sampling intermediate-freuqncy signals and medium temperature sampled signal, pass to secondary list processing (LISP) unit 8 by the one group of intermediate-freuqncy signal data and the medium temperature data of communication mode after with mixing.The mixed frequency signal data that 8 pairs of secondary table units receive carry out phase deviation calculating and temperature compensation is calculated, and convert concentration at last to and show.
Microwave concentration meter of the present utility model calculates and shows sequential control, the signal analysis and processing of the emission of microwave signal, reception, sampling is to be finished by two processing units respectively, i.e. list processing (LISP) unit 7, secondary list processing (LISP) unit 8.Wherein a list processing (LISP) unit 7 comprises: dsp processor (TMS320F2812) 10, signal attenuation module 11, microwave signal source module 12, electronic switch module 15, A/D modular converter 16, communication module I14.Its major function is to produce microwave signal, to launched microwave with receive microwave and carry out mixing, gathers mixed frequency signal, temperature signal, discerns and regulate the amplitude of mixed frequency signal automatically.Secondary list processing (LISP) unit 8 comprises processor of single chip computer (MSP430F149) 22, communication module II23, memory module 24, keyboard load module 25, display module 26, valve position signal output module 28 and concentration signal output module 27.Calculating, medium temperature compensation, concentration calculating, demonstration, the keyboard input of parameter, the concentration PID control of mainly finishing the microwave mixer signal phase difference is exported, the output and the identification of pipeline empty pipe condition of concentration value.
The microwave concentration meter working method is divided measurement pattern and calibration mode, microwave concentration meter is to be in measurement pattern when normal the measurement, just be in measurement pattern when powering on automatically when microwave concentration meter start, specific embodiments and implementing procedure as shown in Figure 5, its job step is as follows:
1.DSP processor 10 is given output voltage DA module (AD5541) 18 by the SPI interface, voltage controlled oscillator in the controlled microwave signal source module 12 (VCO) produces microwave signal, through amplifier I19, microwave signal is divided into two-way, one the tunnel gives microwave launcher 3, through tested pipeline 1, through microwave receiving device 4, again through the signal input port of amplifier II20 and signal attenuation module 11 to frequency mixer (H213) 13, another road directly enters another input port of frequency mixer 13, the intermediate-freuqncy signal that frequency mixer 13 produces arrives electronic switch module 15 through amplifier III21, dsp processor 10 is controlled electronic switch module 15 simultaneously and is received mixed frequency signals, and mixed frequency signal is delivered in the internal memory that the intermediate-freuqncy signal that will finally change behind the A/D modular converter (AD7652) 16 deposits dsp processor 10 in and carried out primary Calculation.
2.DSP pin 48 output high level control electronic switch module 15 receive temperature sensor 2 simulating signals to AD modular converter (AD7652) 16 collecting temperature signals.
3.DSP processor 10 open communication module I (MAX3471) 14 are carried out coding transmission to secondary table unit 8 with intermediate-freuqncy signal data set in the internal memory and temperature sampling data, data communication adopts CRC check to guarantee the correctness of communication data.
4. after the processor of single chip computer (MSP430F149) in the secondary table unit 8 22 starts the communication data of a list processing (LISP) unit 7 of communication module II (MAX3485) 23 receptions, isolate intermediate-freuqncy signal, after judging that signal is not air-control signal, calculate the microwave phase difference data of measured medium, the microwave phase that extracts the concentration known value from memory module 24 is poor, calculate both differences, promptly θ 1.Bidding timing phase difference is θ ", calculate now value then be Δ θ=θ '-θ ", i.e. θ 1=Δ θ, θ '=5.32 °, θ "=0.120 °, then θ 1=5.20 °.
5. processor of single chip computer 22 is isolated the temperature signal of measured medium from the communication data that list processing (LISP) unit 7 receives, and calculates temperature phase compensation value θ 2, concentration=K (θ 1-θ 2)+B by formula, and the calculating concentration value send display module 26 to show.As: θ 1=5.2 ° value of obtaining is 12.694, θ 2=0.613, K=0.25, B=0.15, then concentration M=0.25* (12.694-0.613)+0.15=3.170.
6, processor of single chip computer 22 is judged when densimeter is in the automatic control state pattern, PID computing (PID: proportion integration differentiation is carried out in concentration sampling and concentration setting, English full name is Proportion IntegrationDifferentiation), and by valve position signal output module 28, output water valve Control current value; The signal of valve position signal output module 28 output removes by-pass valve control, allows the more or a little less concentration that changes of water then; While calculating concentration value output signal, concentration signal output module 27 output concentration signals in display module 26 display density values.Concentration signal output module 27 can with the other control system interface.
The measurement of microwave concentration meter is based on measured medium and calculates in the temperature difference compensation of timing signal at the reference fluid of the microwave phase difference of measuring tube and concentration known microwave phase difference and the temperature of measured medium and the reference fluid in same mensuration pipe, so have at least once must be in calibration mode for the mode of operation of every densimeter.When densimeter timing signal or need timing signal once more first, must be full of the concentration known medium in the pipeline, can be clear water, also can be and measured object medium of the same type, by the keyboard operation of secondary table---enter calibration mode by densimeter behind the F1 key.
Process flow diagram as shown in Figure 6, its job step is as follows:
1. enter the demarcation state, stop output of PID valve position signal and the output of concentration value signal.
2. receive once the data that table is uploaded, judge whether to be valid data through CRC check.The invalid reception data that then continue.
3. judge whether the data receive are the blank pipe data, if for blank pipe then directly withdraw from the demarcation state.Normally then enter next step.
4. from data, screen the maximal value X of signal
m, minimum value X
n, obtain peak-to-peak value X
M-n, dsp processor extracts the maximum peak peak value B that has set from internal memory
mWith smallest peaks peak value B
n, when judging X
M-nGreater than B
mOr less than B
n, then send and adjust signal to once showing (dsp processor 10 is exported binary message control signal attenuator modules, changes the damping capacity of electronic attenuator), repeat above-mentioned steps again until B
n＜X
M-n＜B
m
5. this reference fluid microwave phase difference and reference fluid temperature data are stored in the storer until the calibration mode second time.
Example: the maximum peak peak value B of setting
m=20000, smallest peaks peak value B
n=10000, then read for the first time maximal value X
M1=62107, minimum value X
N1=10078, calculate peak-to-peak value X
M1-n1=52029, X then
M1-n1＞B
m, therefore strengthen the attenuator damping capacity, increase 4dB, thereby turn the microwave emissive power down; Obtain data maximal value X for the second time
M2=45027, minimum value X
N2=17023, calculate peak-to-peak value X
M2-n2=28004, X then
M2-n2＞B
m, still do not meet the demands, strengthen the attenuator damping capacity once more, increase 4dB, turn the microwave emissive power once more down; Obtain the 3rd group of data X
M3=32001, minimum value X
N3=25012, calculate peak-to-peak value X
M3-n3=6989, X then
M3-n3＜B
n, still do not meet the demands, reduce the attenuator damping capacity, reduce 2dB, increase the microwave emissive power; Obtain the 4th group of data X
M4=38927, minimum value X
N4=19987, calculate peak-to-peak value X
M4-n4=18940, B then
n＜X
M4-n4＜B
m, meet the demands, microwave phase difference and reference fluid temperature data are stored in the storer, demarcate and finish.
Densimeter is installed in and is full of when normally measuring on the measured medium pipeline, because the medium in the on-the-spot technological requirement, pipeline is stopped supply, measured medium can not be full of pipeline, this situation is known as empty pipe condition, requires densimeter to stop to measure during empty pipe condition.Otherwise can cause erroneous judgement disconnected to the scene.The utlity model has automatic judgement empty pipe condition, and when empty pipe condition, stop measurement of concetration and closing control output.
The automatic judgment task principle of empty pipe condition is as follows:
The mixed frequency signal that microwave when being full of medium in the microwave concentration meter is accepted and microwave is launched is shown in W1 curve among Fig. 7, and the mixed frequency signal when being blank pipe in the pipeline is shown in W2 among Fig. 7.Collection waveform character when extracting the microwave concentration meter operate as normal, it is the consistance (adjacent peaks is consistent with the cycle of adjacent trough and trough with the cycle of crest) of wave period, and when empty pipe condition takes place, the intermediate frequency waveform of gathering will not satisfy condition, can there be huge deviation in cycle between two peak-to-peak cycles of adjacent wave and two the adjacent troughs, so pre-stored is normally gathered waveform character parameter---periodic quantity in secondary list processing (LISP) unit 8, the 8 pairs of each waveforms of gathering in secondary list processing (LISP) unit, calculate the cycle of two adjacent peaks, the cycle of two adjacent troughs, mate with the characteristic parameter of storer, when not meeting several times continuously, be judged as empty pipe condition.As Fig. 9 is that automatic empty pipe condition is judged flow process.
Concentration of medium difference not only between ducted measured medium and the normal concentration medium, and medium temperature also can be different, the phase differential θ 1 of microwave intermediate-freuqncy signal had both comprised the phase differential θ that the concentration change of measured medium causes, also comprised the phase differential θ 2 that the measured medium temperature variation causes, to correctly measure concentration value, must in the phase differential θ 1 of microwave intermediate-freuqncy signal, subtract and the phase differential θ 2 that the medium temperature variation causes, obtain the phase differential θ that real concentration change produces, both θ=θ 1-θ 2.The computing method of θ 2 are as follows:
Measured medium phase differential B, round B table look-up θ A and θ C, then
For example, phase differential under the medium is 5.2 ° now, then checking in the corresponding respectively values of 4.176 ° and 6.223 ° from the dielectric phase difference table is θ 4.176 °=10.568, θ 6.223 °=14.818, then 5.2 °=((4.176 ° of 6.223 °-θ of θ) * (5.2-4.176)/(6.223-4.176))+θ 4.176 °=12.694 of θ 2=θ.
Temperature is pressed Current Temperatures T.t degree, round T table look-up θ T, θ t=(θ (T+5)-θ T) * t/5, θ 2=θ T+ θ t.For example, reference fluid (clear water) temperature is 20.5 degree, then spends the θ 20 °=0.56 that can table look-up respectively and obtain clear water from 20 degree and 25, θ 25 °=0.78, θ 0.5 then adopts method of interpolation to calculate, θ 0.5=(θ 25-θ 20) * 0.5/5=0.053, θ 2=0.56+0.053=0.613.
Real phase differential θ=θ 1-θ 2, concentration=K (θ=θ 1-θ 2)+B, K=0.25, B=0.15.Be concentration M=0.25* (12.694-0.613)+0.15=3.170)
The table of being looked into 1: the concentration phase meter, after can drawing a design according to the measured medium variable concentrations, record phase change data obtain the concentration phase meter;
The table of being looked into 2: the temperature phase meter, can be every one group of test data of 5 degree records, record is deposited then, and the Changing Pattern of temperature variation phase data is recorded in the there, goes to table look-up 2 again during actual then action need.
The table of being looked into 2: the temperature phase meter, can be every one group of test data of 5 degree records, record is deposited then, and the Changing Pattern of temperature variation phase data is recorded in the there, goes to table look-up 2 again during actual then action need.
Table 1
Table 2
Be worth and the B value, calculate the average of K and B value, be COEFFICIENT K and B value, K=0.25, B=0.15.
Above described be specific embodiment of the utility model and the know-why used; if comply with the change that conception of the present utility model is done; when the function that it produced does not exceed spiritual that instructions and accompanying drawing contain yet, must belong to protection domain of the present utility model.
Claims (5)
1. microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer is characterized in that: comprise and measure pipe, microwave launcher, microwave receiving device, temperature sensor, list processing (LISP) unit, secondary list processing (LISP) unit; Microwave launcher, microwave receiving device is arranged on the both sides of measuring pipe respectively accordingly, temperature sensor is arranged on the inside of measuring pipe, microwave launcher, microwave receiving device is connected with a list processing (LISP) unit by concentric cable, temperature sensor is connected with a list processing (LISP) unit, mixed frequency signal and measured medium temperature signal digital sample that a described list processing (LISP) unit transmits and receives microwave, and pass to secondary list processing (LISP) unit with 485 communication modes by communication cable, secondary list processing (LISP) unit calculates the phase differential and the temperature phase compensation value of mixed frequency signal, by formula concentration=K* (θ 1-θ 2)+B calculates measured medium concentration value and demonstration.
2. a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer according to claim 1 is characterized in that: a described list processing (LISP) unit comprises dsp processor, voltage control module, DA module, microwave signal source module, amplifier I, amplifier II, signal attenuation module, frequency mixer, amplifier III, electronic switch module, A/D modular converter, communication module I; Voltage control module, the A/D modular converter, communication module I links to each other with dsp processor respectively, voltage control module links to each other with the DA module, the DA module links to each other with the microwave signal source module, the microwave signal source module links to each other with amplifier I, amplifier I links to each other with microwave launcher, microwave is through tested pipeline, receive by microwave receiving device, microwave receiving device links to each other with amplifier II, amplifier II, signal attenuation module, frequency mixer, amplifier III, electronic switch module is continuous in proper order, temperature sensor links to each other with electronic switch module, and electronic switch module links to each other with the A/D modular converter.
3. a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer according to claim 1 and 2, it is characterized in that: described secondary list processing (LISP) unit comprises processor of single chip computer, communication module II, memory module, keyboard load module, display module, valve position signal output module, concentration value signal output module; Communication module II, memory module, keyboard load module, display module, valve position signal output module, concentration value signal output module link to each other with processor of single chip computer respectively, and communication module II links to each other with communication module I.
4. a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer according to claim 3 is characterized in that: described dsp processor adopts TMS320F2812.
5. a kind of microwave concentration meter that carries out concentration measurement based on DSP, processor of single chip computer according to claim 4 is characterized in that: processor of single chip computer adopts MSP430F149.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881739A (en) * | 2010-06-22 | 2010-11-10 | 浙江双元科技开发有限公司 | Microwave concentration meter and method thereof based on DSP and processor of single chip computer to carry out concentration measurement |
| CN102590230A (en) * | 2012-01-12 | 2012-07-18 | 天津大学 | Microwave resonant cavity sensor and measurement system for measuring concentration of solution |
| CN105067654A (en) * | 2015-09-11 | 2015-11-18 | 天津大学 | Single-mode resonant cavity sensor-based solution concentration measurement method |
-
2010
- 2010-06-22 CN CN2010202325005U patent/CN201740745U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881739A (en) * | 2010-06-22 | 2010-11-10 | 浙江双元科技开发有限公司 | Microwave concentration meter and method thereof based on DSP and processor of single chip computer to carry out concentration measurement |
| CN101881739B (en) * | 2010-06-22 | 2014-03-05 | 浙江双元科技开发有限公司 | Microwave concentration meter and method thereof based on DSP and processor of single chip computer to carry out concentration measurement |
| CN102590230A (en) * | 2012-01-12 | 2012-07-18 | 天津大学 | Microwave resonant cavity sensor and measurement system for measuring concentration of solution |
| CN105067654A (en) * | 2015-09-11 | 2015-11-18 | 天津大学 | Single-mode resonant cavity sensor-based solution concentration measurement method |
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