CN1034431A - A kind of device and method of measuring solution concentration - Google Patents
A kind of device and method of measuring solution concentration Download PDFInfo
- Publication number
- CN1034431A CN1034431A CN 89100103 CN89100103A CN1034431A CN 1034431 A CN1034431 A CN 1034431A CN 89100103 CN89100103 CN 89100103 CN 89100103 A CN89100103 A CN 89100103A CN 1034431 A CN1034431 A CN 1034431A
- Authority
- CN
- China
- Prior art keywords
- microwave
- voltage
- probe
- basic point
- potentiometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention discloses a kind of apparatus and method with the microwave measurement solution concentration.Device of the present invention is made of microwave source, detecting device and probe, utilizes the reflection wave signal of microwave in detected solution to determine the solution concentration value, and can realize the direct-reading of concentration value.Adopt method of the present invention can get rid of the influence of temperature factor, and the error that produces in the measurement device that non-accurate microwave component is constituted is proofreaied and correct to measuring.
Description
The invention belongs to a kind of devices and methods therefor that utilizes the microwave measurement solution concentration, solution described here is meant solution, suspending liquid or emulsion.Specifically be that to utilize the concentration of microwave measurement binary solution or measure in the complex solution mainly be the device of variation of a constituent element content and the using method of this device.This device is made of microwave source, probe and detecting device.
Big magnificent instrument plant in Beijing and South China College of Tropical Crops in nineteen eighty-three joint research and development success utilize microwave attenuation to measure the instrument of dry rubber content in the Heveatex.This instrument is to utilize dry rubber content in the latex influence of microwave transmission intensity to be measured the concentration of dried glue in the latex.This instrument is made of Frequency and Amplitude Stabilization microwave source, isolator, probe and the detecting device be made up of precision attenuator and wave detector.Look into relation curve between dry rubber content and microwave transmission intensity according to detected intensity in transmission, in the hope of the concentration of dried glue in the glue.The shortcoming of this instrument is: 1, owing to use a plurality of microwave devices in the instrument, particularly used as accurate microwave devices such as Frequency and Amplitude Stabilization microwave source precision attenuators, made the production cost costliness of instrument, be difficult to promote the use of; 2, the instrument volume is big, heavy, and electrisity consumption is big; 3, sampling determination need be carried out, direct measurement can't be realized; 4, instrument itself can't directly provide concentration value, need table look-up, and takes a lot of work in the measurement, time-consuming; Therefore 5,, need set up the relation curve between intensity in transmission and solution concentration under the condition of different temperatures because intensity in transmission is the function of temperature.Because the consistance of instrument is poor, need again by the relation curve between intensity in transmission and solution concentration under the platform making different temperatures.Bring great difficulty therefore for manufacturing, the maintenance of instrument; 6, instrument can't be got rid of interference artificial in the detected solution.As the electrolytical adulteration of artificial adding is often arranged in the latex, and this adulteration can make the intensity in transmission of glue change, and produces wrong indication.
The objective of the invention is to overcome above-mentioned weak point of the prior art and a kind of product and using method of utilizing the microwave measurement solution concentration is provided.
The realization of purpose of the present invention is based on such fact, promptly microwave in solution reflection strength and the concentration of solution constituent element corresponding relation is arranged.
Purpose of the present invention can realize by following measure: microwave detector is one the T branch offices of circulator to be housed, microwave tube, detection tube and probe are loaded on respectively on three support arms of T branch offices, and detecting device is made up of detection tube, linearizer and electric measuring instrument.The microwave signal that is produced by microwave source imports probe through circulator, affact in the measured medium, the reflection wave signal that is reflected by measured medium turns back to probe, imports detecting device through circulator, and reflection wave signal is sent into electric measuring instrument and produced indication after detection and linearization process.The electric measuring instrument here can be a voltage table, also can be reometer.
The another kind of mode that realizes the object of the invention is that microwave tube, probe and detection tube all are contained in always on the waveguide device, detection tube is installed in the position that is positioned at the microwave antinode on the straight wave guide, to obtain the holographic signal of reflection wave wave amplitude and phase place, this holographic signal is sent into the information that obtains solution concentration in the detecting device.
Purpose of the present invention also can realize by following measure:
Probe is waveguide device always, and does not adopt antenna-like of the prior art to pop one's head in.Microwave source is made of body effect tube and microwave cavity, and the microwave oscillation frequency is the 8000-12000 megahertz.
In one embodiment of the present of invention, microwave source is the pulsed modulation wave source that declines, and its dutycycle 1/10～1/1000 reduces the working time of oscillator with this, reduces power consumption effectively.
In one embodiment of the present of invention, the linearizer in the detecting device is a comparative voltage, shows the difference of detecting circuit and comparative voltage with voltage table.
Comparative voltage in the linearizer is measured basic point as one in the device of the present invention, adopt a potentiometer to adjust to comparing voltage, at detecting circuit and indirect another potentiometer of comparative voltage, by the magnitude of voltage that this potentiometer is adjusted another measurement basic point as device, perhaps, with voltage table reference voltage another measurement basic point as device, and by the adjustment of reference voltage being adjusted this measurement basic point.
In one embodiment of the present of invention, have an electricity to lead alarm, it is formed by pair of electrodes with by this hummer to electrode control.Electrode can directly be installed on the probe.
Method of the present invention is that the device of measuring concentration is carried out Calibration Method.Method of the present invention be in mensuration, adopt concentration fixed, proofread determinator with the identical or essentially identical solution of the constituent element of detected solution as standard and calibrate, promptly the measurement basic point of determinator is adjusted according to the concentration known value of standard sample.
The invention has the advantages that
1, because device of the present invention is only used few microwave device, particularly adopts the standard sample calibration steps, can make device use non-accurate microwave device, so can reduce cost greatly.
2, power consumption is low, in light weight, can measure in non-transformer area and field.
3, can in very large range realize the direct-reading of concentration value.Use the present invention, the solution that concentration and reflected signal strength are linear is measured, can be completely achieved direct-reading; For concentration and the linear solution of reflected signal strength segmentation, can realize direct-reading by method with the standard sample sectional calibration; When having the solution of better linear relationship to measure, can adopt the modification method approximate reading for concentration and reflected signal strength.But this device is unsuitable for measuring the solution that concentration and reflected signal are non-monotonic relationshi.
4, owing to adopt " standard sample " calibration Calibration Method, measuring accuracy and measuring reliability can be improved, but also the influence of temperature can be avoided measuring.
5, adopt electricity to lead alarm, can get rid of because of being added into the excessive electrolytical interference that causes of mingling in the detected solution to measuring.
6, can directly measure measuring solution, exempt problem of sampling of the prior art, probe directly can be inserted in the detected solution in practical measurement, and obtain reading at once, finding speed is exceedingly fast.
Structure of the present invention and advantage, by explanation to accompanying drawing, will be clearer.
Accompanying drawing 1 is a structural drawing of the present invention, and wherein 1A is a schematic diagram of device, and 1B is the detection junction composition.
Accompanying drawing 2 is an another kind of structural drawing of the present invention, and wherein 2A is a schematic diagram, and 2B is the detection junction composition.
Accompanying drawing 3 is the pulse-modulator circuit diagram.
Accompanying drawing 4 is wave detector and the linearizers in the detecting device.
Accompanying drawing 5 is electrode assembling synoptic diagram that probe and electricity are led alarm.
6A is a relation curve between dry rubber content and detecting circuit in the Heveatex;
6B is a relation curve between sediment charge and detecting circuit in the river;
6C is a relation curve between metal ion content and detecting circuit in the electrolytic solution;
6D is a relation curve between sugared content and detecting circuit in the sugar juice.
Microwave oscillation is produced by microwave source 1 among the accompanying drawing 1A, imports in the measured medium 4 through circulator 2 and probe 3, is sent in the detecting device 5 through circulator 2 by the signal of dieletric reflection, obtains concentration information.Accompanying drawing 1B is the structural drawing of microwave detector, and microwave detector is a T branch offices, and microwave tube 8 and wave detector 9 place respectively on the arm 14 and arm 13 of T branch offices, and arm 15 is connected with probe 3. Screw 10,11,12 is used to adjust microwave oscillation frequency and phase place.
1 is microwave source among the accompanying drawing 2A, and 5 is detecting device, and 3 are probe, and 4 is measured medium.Accompanying drawing 2 and accompanying drawing 1 different are that microwave detector is waveguide device always, and do not use very clear that circulator, this point can see in accompanying drawing 2B.By wave detector 9, microwave tube 8 in Fig. 2 B visible detection device 5 with pop one's head in 3 all on waveguide device always, wave detector 9 is installed in the position that is positioned at microwave standing wave antinode on the straight wave guide, to obtain the holographic signal of reflection wave wave amplitude and phase place.Screw 16 and 17 is used to change the frequency and the phase place of microwave oscillator.Adopt the structure of accompanying drawing 2 both can save circulator, simplify the internal structure of an organization, can improve the sensitivity of detection again.
7 is pulse-modulator in accompanying drawing 1 and 2, the pulse signal that is produced affacts and produces pulse modulated microwave oscillation signal on the microwave tube 8, reduce the oscillator working time with this, reduce power consumption, the pulsed modulation dutycycle should be best between 1/10-1/1000.
Accompanying drawing 3 provides a kind of rect.p. modulation circuit, by BG
1, BG
2Produce multi-harmonic-oscillations, at R
4Last acquisition rect.p. is through BG
3After the power amplification by BG
3Emitter-base bandgap grading output.It should be noted that and when enforcement is of the present invention, also can adopt various pulse-modulator of the prior art.
Accompanying drawing 4 provides detection and linearizer in the detecting device.As seen from Figure 4, linearization plaited straw lung Chinese scholartree slowly is that rectified signal and the comparative voltage that Miao obstructs after an ancient measure ㄆ 2 detections compares, and its difference is shown by voltage table 21.Voltage table can adopt pointer-type, and is also digital.Comparative voltage is with a potentiometer W
1Adjust, the voltage of being adjusted is as a measurement basic point of device of the present invention; The indirect potentiometer W of detecting circuit and comparative voltage
2, by W
2The magnitude of voltage of being adjusted is as another measurement basic point of device of the present invention.By " adjustment " of measuring basic point to these two, the ratio that can make detecting circuit and tested concentration value is 1, realizes direct-reading." adjustment " described here is " standard sample " disclosed in this invention calibration method.As another embodiment of the invention, can promptly adjust gauge outfit sensitivity with the reference voltage of voltage table 21, measure basic point as of the present invention another, with the reference voltage of adjusting gauge outfit 21, promptly adjust gauge outfit sensitivity, replace potentiometer W
2Adjustment.
" standard sample " calibration method be adopt two concentration values known but does not wait, identical with detected solution or the akin solution conduct of constituent element composition " standard sample ", device of the present invention probe is inserted low one of concentration value in " standard sample ", adjust potentiometer W according to the concentration known value
1, make the gauge outfit indicated value corresponding with the concentration known value, will pop one's head in then and insert in the concentration higher " standard sample ", adjust potentiometer W
2, make gauge outfit indication with its concentration value respective value near, in the insertion lower concentration values " standard sample " of will pop one's head in again, repeat said process, progressively approach, finally make the indication of gauge outfit corresponding with two " standard sample " concentration values respectively, so far, finished to the device calibration operation.As adopt and adjust gauge outfit sensitivity replacement adjustment potentiometer W
2, its calibration operation is identical with aforementioned program, but whole calibration operation is easier, does not need repeatedly to repeat, and progressively approaches.This is because can not cause the variation of comparative voltage to the adjustment of gauge outfit sensitivity.The error that the detector that adopts " standard sample " Calibration Method to make to be made of non-accurate microwave device produces in surveying work obtains correcting at any time.When the temperature of " standard sample " was identical with the detected solution temperature, calibration operation itself can be got rid of the influence of temperature factor to measuring, and no longer needs overcome the influence of temperature to measuring with the penalty method of available technology adopting.
By in the accompanying drawing 5 as seen, probe 18 is waveguide device always, adopts the probe of straight wave guide, but both simplified structures also can be avoided pop one's head in matching problem in the microwave transmission that causes of the antenna-like of available technology adopting.19 of probe end is the window that is made of high-frequency dielectric.High-frequency dielectric can be organic glass, teflon, nylon; Or polystyrene etc.20 is an electrode, and the probe wave guide wall be another electrode, and this is connected to electrode and hummer, constitutes electric Leader alarm device, and buzzer circuit designs and the interval of electrode should be able to satisfy that hummer did not send sound equipment when electrolyte content was not more than ratings in the detected solution.
In the accompanying drawing 1 and 26 is power supply, and it can be the direct supply that an accumulator constitutes, and also a rectifying voltage regulator also can be the power supply that is made of ac charging power supply and accumulator.
Accompanying drawing 6 is employing several solns concentration that the present invention surveyed and the relation curve between detecting circuit.The concentration of detecting circuit and these solution has good linear relationship as seen from the figure.When utilizing measure linear of the present invention to concern bad solution, can adopt a plurality of " standard sample " sectional calibration, or add the method reading of modified value.
Enforcement of the present invention is not limited to the above, can design disclosed according to the present invention utilizes the multiple mode of prior art to realize.
Claims (12)
1, a kind of device of microwave measurement solution concentration, comprise microwave source, probe, detection tube and detecting device, it is characterized in that microwave detector is the T branch offices that circulator is housed, microwave tube, detection tube and probe are loaded on respectively on three support arms of T branch offices, and detecting device is made up of detection tube, linearizer and electric measuring instrument.
2, a kind of device of microwave measurement solution concentration, comprise microwave source, probe, detection tube and detecting device, it is characterized in that microwave tube, detection tube and probe are contained in always on the waveguide device, detection tube is contained in the position that is positioned at the microwave antinode on the straight wave guide, and detecting device is made up of detection tube, linearizer and electric measuring instrument.
3, claim 1 or 2 device is characterized in that probe is waveguide device always.
4, the device of claim 3 is characterized in that microwave source is made of body effect tube and microwave cavity, and the microwave oscillation frequency is 8000～12000 megahertzes.
5, the device of claim 4 is characterized in that microwave source is the pulsed modulation wave source that declines, and its dutycycle is 1/10～1/1000.
6, the device of claim 4 is characterized in that linearizer is the voltage table that a comparative voltage and shows the difference between detecting circuit and comparative voltage.
7, the device of claim 5 is characterized in that linearizer is the voltage table that a comparative voltage and shows the difference between detecting circuit and comparative voltage.
8, the device of claim 6, it is characterized in that with the measurement basic point of comparative voltage as device, and voltage is relatively adjusted with a potentiometer, at detecting circuit and indirect another potentiometer of comparative voltage, by the magnitude of voltage that this potentiometer is adjusted another measurement basic point as device, perhaps, with voltage table reference voltage another measurement basic point as device, and by the adjustment of reference voltage being adjusted this measurement basic point.
9, the device of claim 7, it is characterized in that with the measurement basic point of comparative voltage as device, and voltage is relatively adjusted with a potentiometer, at detecting circuit and indirect another potentiometer of comparative voltage, by the magnitude of voltage that this potentiometer is adjusted another measurement basic point as device, perhaps, with voltage table reference voltage another measurement basic point as device, and by the adjustment of reference voltage being adjusted this measurement basic point.
10, the device of claim 8 is characterized in that alarm is arranged on the device, and it is by being installed on the pair of electrodes on the probe and being made up of this hummer to electrode control.
11, the device of claim 9 is characterized in that alarm is arranged on the device, and it is by being installed on the pair of electrodes on the probe and being made up of this hummer to electrode control.
12, measure the method for solution concentration with microwave device, it is characterized by in measuring process and measurement mechanism is calibrated with standard sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100103 CN1034431A (en) | 1989-01-04 | 1989-01-04 | A kind of device and method of measuring solution concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100103 CN1034431A (en) | 1989-01-04 | 1989-01-04 | A kind of device and method of measuring solution concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1034431A true CN1034431A (en) | 1989-08-02 |
Family
ID=4853694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100103 Pending CN1034431A (en) | 1989-01-04 | 1989-01-04 | A kind of device and method of measuring solution concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1034431A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495082A (en) * | 2011-12-10 | 2012-06-13 | 太原理工大学 | Microwave on-line detection device of ethanol water solution components and detection method thereof |
| CN102590230A (en) * | 2012-01-12 | 2012-07-18 | 天津大学 | Microwave resonant cavity sensor and measurement system for measuring concentration of solution |
| CN102680499A (en) * | 2012-05-03 | 2012-09-19 | 东南大学 | Sensor and method for detecting salinity based on micro-electromechanical system (MEMS) technology |
| CN102809572A (en) * | 2012-08-08 | 2012-12-05 | 天津大学 | System for measuring solution concentration by using perturbation method |
| CN107991445A (en) * | 2017-11-28 | 2018-05-04 | 江苏康缘药业股份有限公司 | The online test method of concentration of alcohol during a kind of Chinese medicine alcohol precipitation |
-
1989
- 1989-01-04 CN CN 89100103 patent/CN1034431A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495082A (en) * | 2011-12-10 | 2012-06-13 | 太原理工大学 | Microwave on-line detection device of ethanol water solution components and detection method thereof |
| CN102590230A (en) * | 2012-01-12 | 2012-07-18 | 天津大学 | Microwave resonant cavity sensor and measurement system for measuring concentration of solution |
| CN102680499A (en) * | 2012-05-03 | 2012-09-19 | 东南大学 | Sensor and method for detecting salinity based on micro-electromechanical system (MEMS) technology |
| CN102809572A (en) * | 2012-08-08 | 2012-12-05 | 天津大学 | System for measuring solution concentration by using perturbation method |
| CN107991445A (en) * | 2017-11-28 | 2018-05-04 | 江苏康缘药业股份有限公司 | The online test method of concentration of alcohol during a kind of Chinese medicine alcohol precipitation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115015039A (en) | System and method for detecting surface density | |
| US5804976A (en) | Device for determining the ratio of substances | |
| CN1034431A (en) | A kind of device and method of measuring solution concentration | |
| Hamon | A portable temperature-chlorinity bridge for estuarine investigations and sea water analysis | |
| CN111948462A (en) | Coaxial structure broadband quantum microwave measuring device and method | |
| Skresanov et al. | Improved differential Ka band dielectrometer based on the wave propagation in a quartz cylinder surrounded by high loss liquid under test | |
| US4891573A (en) | Evanescent mode tester for ceramic dielectric substrates | |
| Yao et al. | Surface acoustic wave sensor system for the determination of total salt content in serum | |
| CN108548853A (en) | A kind of strong constitutive property soil body water retention characteristic curve transient state high speed tester device and method | |
| CN212207191U (en) | Soil humidity detection device | |
| Ni et al. | Design and calibration of soil water content sensor based on dual frequency excitation | |
| Zhang et al. | Research and application of a new soil moisture sensor | |
| Slight | The measurement of moisture content | |
| CN2703255Y (en) | Microwave cavity resonator in detector for detecting material quality and moisture content | |
| CN2396398Y (en) | Capacitive type soil humidity meter | |
| CN112748131A (en) | Method for detecting aggregate moisture content based on microwave principle | |
| CN216792095U (en) | Rapid soil moisture measuring device based on dielectric characteristics | |
| CN2242449Y (en) | Instrument for measuring moisture and temp. of grain or materials | |
| CN114858825B (en) | Material moisture content measuring device and method based on microwave cavity detection | |
| CN221173573U (en) | Capacitance liquid level calibration device | |
| CN114295645B (en) | Resonant microwave sensor with adjustable working frequency | |
| CN1177099A (en) | Method for investigating various physical parameters of ice core | |
| Schiraldi et al. | Determination of phase transitions through AC conductance | |
| US3379971A (en) | Microwave means and method for measuring the electrolytic content of solutions | |
| CN114088769B (en) | High-frequency electric field charge induction type soil moisture sensor and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |