CN104568057A - Echo signal adjusting method and echo signal adjusting device suitable for guided wave radar - Google Patents
Echo signal adjusting method and echo signal adjusting device suitable for guided wave radar Download PDFInfo
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- CN104568057A CN104568057A CN201410848800.9A CN201410848800A CN104568057A CN 104568057 A CN104568057 A CN 104568057A CN 201410848800 A CN201410848800 A CN 201410848800A CN 104568057 A CN104568057 A CN 104568057A
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Abstract
The invention provides an echo signal adjusting method and an echo signal adjusting device suitable for guided wave radar. The method comprises the steps of: acquiring an echo amplitude signal, judging whether the amplitude of the echo amplitude signal is within a preset range, and adjusting the output of a digital-to-analog converter and a digital potentiometer to make the echo signal keep in a reasonable range. The device mainly comprises a signal amplifier, a standard voltage source, the digital-to-analog converter, the digital potentiometer and a control module, and is used for acquiring the echo amplitude signal which is amplified and output by the signal amplifier, and judging whether the amplitude of the echo amplitude signal is within the preset range, so that the output of the digital-to-analog converter and the digital potentiometer can be adjusted to make the echo signal keep in the reasonable range, and material level distance can be obtained and output according to the calculation of the echo amplitude signal. The acquired echo amplitude signal always keeps in the narrow amplitude range which is easy to acquire and process, and the guided wave radar can be applicable to different working environments.
Description
Technical field
The present invention relates to industrial automation, what relate generally to is guided wave radar material level gauge for measuring controlling level in tank body, more specifically, especially relates to a kind of the echoed signal control method and the device that are suitable for guided wave radar.
Background technology
Guided wave radar material level gauge is the instrument for measuring height of materials, usually the top needing the tank body measuring height of materials is arranged on, electromagnetic impulse is launched by guided wave bar by guided wave radar material level gauge, after electromagnetic wave runs into measured matter, portion of energy is then reflected back, by calculating electromagnetic radiation pulse and mistiming of returning pulse can obtain the distance of material to level meter reference field, then the height of material can be calculated according to correlation parameters such as tank body height.
Because measured matter specific inductive capacity is different, distance is different, and the rangeability of echoed signal reaches tens dB usually.During less in Measuring Dielectric Constant, distant thing position, echoed signal is minimum; During, close together comparatively large in Measuring Dielectric Constant, echoed signal is very big again.Guided wave radar material level gauge in current engineer applied, owing to limiting by system power dissipation, usually adopt the amplifying circuit of several groups of different gains, processor, according to the size of the echoed signal collected, switches dynamically between several groups of amplifying circuits.Be adjusted to less enlargement factor when echoed signal is larger, echoed signal, hour being adjusted to larger enlargement factor, making the amplitude of echoed signal be in one and is convenient to, within the scope that late-class circuit detects, be unlikely to excessive or too small.Cross the range that conference exceeds amplitude detection, too small meeting cannot detect echoed signal.
But in actual applications, because measured matter specific inductive capacity is usually included between 1.5 to 80, measuring distance is included between 1 meter to 70 meters, consider that some Test Cycle is in metal can again, echo reflection is relatively large, some is measured is the space environment opened, and echo reflection is relatively little, and the dynamic range of echo is very large.Comprehensive above factor, metering circuit is in measuring process, enlargement factor can be preset according to current working parameter, but single enlargement factor is difficult to the measurement meeting gamut scope, the amplifying circuit switching different gains is needed in measuring process, when being switched to another grade of amplifying circuit by one-level amplifying circuit, can cause the saltus step that signal amplitude is larger, microprocessor needs to carry out large quantitative analysis to it and confirm effectively reliable to guarantee the echoed signal collected.
Comprehensive above factor, adopts the method for many group amplifying circuits can not meet the needs of practical application completely.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of the echoed signal control method and the device that are suitable for guided wave radar, for solving in prior art the problem adopting the method for many group amplifying circuits can not meet the needs of practical application completely.
For achieving the above object and other relevant objects, the invention provides following technical scheme:
One
Be suitable for an echoed signal control method for guided wave radar, comprise: gather echo amplitude signal; Judge whether the amplitude of described echo amplitude signal is in preset range: if not, then regulate digital to analog converter with until platform voltage amplitude is in preset range, and and then regulate digital regulation resistance with until make described echo amplitude signal be in preset range, and to be exported; If so, then receive described echo amplitude signal and calculate thing distance of positions distance values according to described echo amplitude signal, and being exported.
They are two years old
Be suitable for an echoed signal regulating device for guided wave radar, comprise: signal amplifier, for receiving echo amplitude signal and being exported after amplifying it; Reference voltage source, is exported for generation of a reference voltage; Digital to analog converter, is connected to described reference voltage source and amplifier, for producing an adjustable reference voltage according to described reference voltage, and is exported; Digital regulation resistance, connects described amplifier, for regulation output variable resistance; Control module, be connected to described signal amplifier, digital to analog converter and digital regulation resistance, amplify through described signal amplifier the echo amplitude signal exported for gathering, and judge whether the amplitude of described echo amplitude signal is in preset range: if not, then regulate the reference voltage amplitude that exports of digital to analog converter to preset range, and and then the variable resistance regulating digital regulation resistance to export with until described echo amplitude signal is in preset range; If so, then according to described echo amplitude signal calculate the thing distance of positions from and exported.
In above-mentioned first scheme, microcontroller acquires echoed signal, according to echo signal amplitude size, change digital regulation resistance resistance value, and then change amplifying circuit enlargement factor, make echoed signal be amplified to an amplitude range being convenient to detect, measurement range can not be exceeded because of too large, also can not be difficult to because of too little detect, but remain at an amplitude being convenient to microcontroller acquires and process narrow and small on.
As mentioned above, the present invention has following beneficial effect: the present invention is by analyzing echoed signal, then digital regulation resistance and digital to analog converter are being regulated, export continuously adjustable reference voltage and resistance value, thus change the enlargement factor of signal amplifier, thus make obtained echoed signal remain at one to be convenient in the amplitude narrow range of acquisition and processing, to adapt to various different work condition environment.
Accompanying drawing explanation
Fig. 1 is shown as the process flow diagram that the present invention is suitable for the echoed signal control method of guided wave radar.
Fig. 2 is shown as and regulates digital to analog converter with until platform voltage amplitude is in the method flow diagram of preset range.
Fig. 3 is shown as and regulates digital regulation resistance with until make described echo amplitude signal be in the method flow diagram of preset range.
Fig. 4 is shown as a kind of schematic diagram being suitable for the echoed signal regulating device of guided wave radar of the present invention.
Drawing reference numeral explanation
S10-S2022 method step
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
Embodiment one
See Fig. 1, show a kind of process flow diagram being suitable for the echoed signal control method of guided wave radar provided by the invention, as shown in the figure, described in be suitable for the echoed signal control method of guided wave radar, comprise the following steps:
Step S10, gathers echo amplitude signal;
Step S20, judges whether the amplitude of described echo amplitude signal is in preset range:
Step S201, if not, then regulates digital to analog converter with until platform voltage amplitude is in preset range, and and then regulate digital regulation resistance with until make described echo amplitude signal be in preset range, and to be exported;
Step S202, if so, then receives described echo amplitude signal and calculates thing distance of positions distance values according to described echo amplitude signal, and being exported.
Above-mentioned echoed signal control method is according to echo signal amplitude size, change digital regulation resistance resistance value, and then change amplifying circuit enlargement factor, echoed signal is made to be amplified to an amplitude range being convenient to detect, measurement range can not be exceeded because of too large, also can not be difficult to because of too little detect, but remain at an amplitude being convenient to acquisition and processing narrow and small on.
Further, see Fig. 2, for regulating digital to analog converter with until platform voltage amplitude is in the method flow diagram of preset range, as shown in the figure, in described step S201, described adjustment digital to analog converter is with until the concrete grammar step that platform voltage amplitude is in preset range comprises:
Step S201a, gathers echo bracket signal;
Step S201b, judges whether the platform voltage amplitude of described echo bracket signal is in default zone of reasonableness: if not, then regulate digital to analog converter to regulate the reference voltage value exported to zone of reasonableness by control module, and return step S201a; If so, then enter and regulate digital regulation resistance step.
Further, see Fig. 3, for regulating digital regulation resistance with until make described echo amplitude signal be in the method flow diagram of preset range, in described step S201, described adjustment digital regulation resistance is with until the concrete grammar step making described echo amplitude signal be in preset range comprises:
Step S202a, gathers echo amplitude signal;
Step S201b, judges whether the signal amplitude of described echo amplitude signal is in default zone of reasonableness: if not, then regulate digital regulation resistance to adjust described echo amplitude signal to preset range by control module, and return step S202a; If so, then enter control module and calculate material level step.
Embodiment two
Further, see Fig. 4, present invention also offers a kind of echoed signal regulating device being suitable for guided wave radar, comprising: signal amplifier, for receiving echo amplitude signal and being exported after amplifying it; Reference voltage source, is exported for generation of a reference voltage; Digital to analog converter, is connected to described reference voltage source and amplifier, for producing an adjustable reference voltage according to described reference voltage, and is exported; Digital regulation resistance, connects described amplifier, for regulation output variable resistance; Control module, be connected to described signal amplifier, digital to analog converter and digital regulation resistance, amplify through described signal amplifier the echo amplitude signal exported for gathering, and judge whether the amplitude of described echo amplitude signal is in preset range: if not, then regulate the reference voltage amplitude that exports of digital to analog converter to preset range, and and then the variable resistance regulating digital regulation resistance to export with until described echo amplitude signal is in preset range; If so, then according to described echo amplitude signal calculate the thing distance of positions from and exported.
Particularly, low input bias current selected by described signal amplifier, the track to track operational amplifier of offset current and temperature drift sets up amplifying circuit; The reference voltage source that described reference voltage source selects temperature drift to be low to moderate 15ppm provides reference voltage to digital to analog converter; Described digital to analog converter selects the digital to analog converter of 16 by parameter preset output reference voltage; Digital regulation resistance selects the digital regulation resistance of 8 to produce a resistance and the warm feedback of floating the resistance being low to moderate 15ppm and forming amplifying circuit by parameter preset.
Further, described control module is microprocessor (MCU), and microprocessor, according to the size of echoed signal bracket signal, regulates the code that digital to analog converter exports, and then change adjustable reference voltage value, regulate the bracket signal of echoed signal to OK range.
In above-described embodiment two, microcontroller acquires echoed signal, according to echo signal amplitude size, change digital regulation resistance resistance value, and then change amplifying circuit enlargement factor, make echoed signal be amplified to an amplitude range being convenient to detect, measurement range can not be exceeded because of too large, also can not be difficult to because of too little detect, but remain at an amplitude being convenient to microcontroller acquires and process narrow and small on.
In sum, the present invention is by analyzing echoed signal, then digital regulation resistance and digital to analog converter are being regulated, export continuously adjustable reference voltage and resistance value, thus change the enlargement factor of signal amplifier, thus to make or the echoed signal that obtains remains at one and is convenient in the amplitude narrow range of acquisition and processing, to adapt to various different work condition environment.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. be suitable for an echoed signal control method for guided wave radar, it is characterized in that, comprising:
Gather echo amplitude signal;
Judge whether the amplitude of described echo amplitude signal is in preset range:
If not, then regulate digital to analog converter with until platform voltage amplitude is in preset range, and and then regulate digital regulation resistance with until make described echo amplitude signal be in preset range, and to be exported; If so, then receive described echo amplitude signal and calculate thing distance of positions distance values according to described echo amplitude signal, and being exported.
2. the echoed signal control method being suitable for guided wave radar according to claim 1, is characterized in that, described adjustment digital to analog converter is with until the concrete grammar that platform voltage amplitude is in preset range comprises:
Gather echo bracket signal;
Judge whether the platform voltage amplitude of described echo bracket signal is in default zone of reasonableness: if not, then regulate digital to analog converter to regulate the reference voltage value exported to zone of reasonableness by control module, and return described collection echo bracket signal step; If so, then enter and regulate digital regulation resistance step.
3. the echoed signal control method being suitable for guided wave radar according to claim 1, is characterized in that, described adjustment digital regulation resistance is with until the concrete grammar making described echo amplitude signal be in preset range comprises:
Gather echo amplitude signal;
Judge whether the signal amplitude of described echo amplitude signal is in default zone of reasonableness: if not, then regulate digital regulation resistance to adjust described echo amplitude signal to preset range by control module, and return described collection echo amplitude signals step; If so, then enter control module and calculate material level step.
4. be suitable for an echoed signal regulating device for guided wave radar, it is characterized in that, comprising:
Signal amplifier, for receiving echo amplitude signal and being exported after amplifying it;
Reference voltage source, is exported for generation of a reference voltage;
Digital to analog converter, is connected to described reference voltage source and amplifier, for producing an adjustable reference voltage according to described reference voltage, and is exported;
Digital regulation resistance, connects described amplifier, for regulation output variable resistance;
Control module, be connected to described signal amplifier, digital to analog converter and digital regulation resistance, amplify through described signal amplifier the echo amplitude signal exported for gathering, and judge whether the amplitude of described echo amplitude signal is in preset range: if not, then regulate the reference voltage amplitude that exports of digital to analog converter to preset range, and and then the variable resistance regulating digital regulation resistance to export with until described echo amplitude signal is in preset range; If so, then according to described echo amplitude signal calculate the thing distance of positions from and exported.
5. the echoed signal regulating device being suitable for guided wave radar according to claim 1, it is characterized in that, described control module is for regulating digital to analog converter with until when platform voltage amplitude is in preset range, also for gathering echo bracket signal, and judge whether the platform voltage amplitude of described echo bracket signal is in default zone of reasonableness: if not, then regulate digital to analog converter to regulate the reference voltage value exported to zone of reasonableness by control module, and return described collection echo bracket signal step; If so, then enter and regulate digital regulation resistance step.
6. the echoed signal regulating device being suitable for guided wave radar according to claim 1, it is characterized in that, described control module is for regulating digital regulation resistance with until when making described echo amplitude signal be in preset range, also for gathering echo amplitude signal, and judge whether the signal amplitude of described echo amplitude signal is in default zone of reasonableness: if not, then regulate digital regulation resistance to adjust described echo amplitude signal to preset range by control module, and return described collection echo amplitude signals step; If so, then enter control module and calculate material level step.
7. the echoed signal regulating device being suitable for guided wave radar according to claim 1, is characterized in that, described control module is microprocessor.
8. the echoed signal regulating device being suitable for guided wave radar according to claim 1, is characterized in that, described signal amplifier is track to track operational amplifier.
9. the echoed signal regulating device being suitable for guided wave radar according to claim 1, is characterized in that, described reference voltage source is the reference voltage source that temperature drift is low to moderate 15ppm.
10. the echoed signal regulating device being suitable for guided wave radar according to claim 1, is characterized in that, described digital to analog converter is the digital to analog converter of 16, and described digital regulation resistance is the digital regulation resistance of 8.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974387A (en) * | 2016-05-13 | 2016-09-28 | 中国科学院电子学研究所 | Signal gain control method and device |
| CN107817484A (en) * | 2016-09-12 | 2018-03-20 | 北京万集科技股份有限公司 | The multiplication factor processing method and processing device of laser radar amplifying circuit |
| CN108225482A (en) * | 2016-12-15 | 2018-06-29 | 重庆川仪自动化股份有限公司 | Suitable for the gain-adaptive adjusting method and system of guided wave radar |
| WO2021056332A1 (en) * | 2019-09-26 | 2021-04-01 | 深圳市速腾聚创科技有限公司 | Laser radar signal processing method and apparatus, and computer device and storage medium |
| CN112767642A (en) * | 2020-12-14 | 2021-05-07 | 深圳市豪恩安全科技有限公司 | Double-light-source photoelectric smoke detector detection method, device and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1221258A (en) * | 1997-12-24 | 1999-06-30 | 铁道部株洲电力机车研究所 | Compound electric circuit for realizing digital/module conversion |
| CN201096814Y (en) * | 2007-10-25 | 2008-08-06 | 河南思达高科技股份有限公司 | Generation device for sudden increase and decrease of voltage signal |
| CN101281052A (en) * | 2007-04-02 | 2008-10-08 | 周建明 | High precision low-power consumption radar liquid level instrument system |
| WO2010043065A1 (en) * | 2008-10-16 | 2010-04-22 | Uster Technologies Ag | Device and method for determining a dielectric property of a capacitor arrangement |
| CN103368529A (en) * | 2013-07-29 | 2013-10-23 | 中国石油大学(华东) | Multichannel acoustic phased random waveform signal generator |
| CN104105952A (en) * | 2012-02-08 | 2014-10-15 | Vega格里沙贝两合公司 | Apparatus and method for correcting offset |
-
2014
- 2014-12-31 CN CN201410848800.9A patent/CN104568057B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1221258A (en) * | 1997-12-24 | 1999-06-30 | 铁道部株洲电力机车研究所 | Compound electric circuit for realizing digital/module conversion |
| CN101281052A (en) * | 2007-04-02 | 2008-10-08 | 周建明 | High precision low-power consumption radar liquid level instrument system |
| CN201096814Y (en) * | 2007-10-25 | 2008-08-06 | 河南思达高科技股份有限公司 | Generation device for sudden increase and decrease of voltage signal |
| WO2010043065A1 (en) * | 2008-10-16 | 2010-04-22 | Uster Technologies Ag | Device and method for determining a dielectric property of a capacitor arrangement |
| CN104105952A (en) * | 2012-02-08 | 2014-10-15 | Vega格里沙贝两合公司 | Apparatus and method for correcting offset |
| CN103368529A (en) * | 2013-07-29 | 2013-10-23 | 中国石油大学(华东) | Multichannel acoustic phased random waveform signal generator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974387A (en) * | 2016-05-13 | 2016-09-28 | 中国科学院电子学研究所 | Signal gain control method and device |
| CN105974387B (en) * | 2016-05-13 | 2019-08-13 | 中国科学院电子学研究所 | A kind of signal gain control method and device |
| CN107817484A (en) * | 2016-09-12 | 2018-03-20 | 北京万集科技股份有限公司 | The multiplication factor processing method and processing device of laser radar amplifying circuit |
| CN108225482A (en) * | 2016-12-15 | 2018-06-29 | 重庆川仪自动化股份有限公司 | Suitable for the gain-adaptive adjusting method and system of guided wave radar |
| WO2021056332A1 (en) * | 2019-09-26 | 2021-04-01 | 深圳市速腾聚创科技有限公司 | Laser radar signal processing method and apparatus, and computer device and storage medium |
| CN112767642A (en) * | 2020-12-14 | 2021-05-07 | 深圳市豪恩安全科技有限公司 | Double-light-source photoelectric smoke detector detection method, device and system |
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