CN117970323A - Laser millimeter wave integrated radar level gauge and measuring method - Google Patents
Laser millimeter wave integrated radar level gauge and measuring method Download PDFInfo
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- CN117970323A CN117970323A CN202311430632.7A CN202311430632A CN117970323A CN 117970323 A CN117970323 A CN 117970323A CN 202311430632 A CN202311430632 A CN 202311430632A CN 117970323 A CN117970323 A CN 117970323A
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Abstract
The invention belongs to the technical field of radar level gauges, in particular to a laser millimeter wave integrated radar level gauge and a measuring method. The millimeter wave radar module is wider along with the increase of the measuring distance, if the millimeter wave radar module measures in a smaller space, the millimeter wave radar module can encounter the reflection echoes of obstacles such as side walls and the like, so that errors or even errors are generated in measurement, the laser radar module is extremely narrow, the problem encountered by the millimeter wave radar can be avoided, and the measuring result of the laser radar module can be adopted under the condition. The laser radar can generate larger effects such as reflection and refraction on light under the environment with dust and fog, and can not work stably, and the millimeter wave radar module measuring result can be adopted under the condition.
Description
Technical Field
The invention belongs to the technical field of radar level gauges, and particularly relates to a laser millimeter wave integrated radar level gauge and a measuring method.
Background
The level measuring instruments in industrial instruments are of many kinds. In recent years, non-contact electromagnetic wave radar level meters are increasingly applied, millimeter wave radar level meters are one of the mainstream technologies, and are widely applied.
Currently, the beam angle of the millimeter wave radar level gauge is more than 3 degrees, along with the increase of the measurement distance, the beam is wider and wider, and if the millimeter wave radar level gauge is measured in a smaller space, the echo is reflected by obstacles such as side walls, and errors or even mistakes are caused in measurement. In addition, in different working environments, the background noise is different, so that the effectiveness of millimeter wave radar level gauge measuring signals is poor. In addition, in the installation site of the millimeter wave radar level gauge, the orientation of the millimeter wave radar beam is not well debugged, the installation is not intuitive, and the installation error is easy to occur.
Disclosure of Invention
The invention aims to provide a laser millimeter wave integrated radar level gauge and a measuring method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides a laser millimeter wave integration radar level gauge, includes the shell, be equipped with millimeter wave radar module, laser radar module and comparison analysis module in the shell, millimeter wave radar module, laser radar module electricity are connected to comparison analysis module, millimeter wave radar module is used for transmitting millimeter wave and receiving the echo signal measurement and obtain first level information, laser radar module is used for transmitting laser and receiving the echo signal measurement and obtain second level information, comparison analysis module is used for carrying out comparison analysis and obtains relative exact and accurate level result to the first level information of millimeter wave radar module measurement and the second level information of laser radar module measurement.
Preferably, the millimeter wave radar module comprises a first circuit board, wherein a millimeter wave radar chip, a millimeter wave transmitting antenna and an echo receiving antenna are arranged on the first circuit board, and the millimeter wave transmitting antenna and the echo receiving antenna are onboard antennas.
Preferably, the laser radar module comprises a second circuit board, and a driving circuit, a laser transmitter, a laser receiver and a laser signal processing circuit are arranged on the second circuit board; and the first circuit board is provided with an optical path channel for the laser transmitter to transmit signals and the laser receiver to transmit signals.
Preferably, the second circuit board is located on the upper side of the first circuit board, and a lens is further disposed on the lower side of the first circuit board, and the lens is used for narrowing the millimeter radar wave beam emitted by the millimeter wave emitting antenna and narrowing the laser beam emitted by the laser emitter.
Preferably, the millimeter wave transmitting antenna and the echo receiving antenna adopt patch antennas.
Preferably, the comparison and analysis module comprises a third circuit board, and a processor is arranged on the third circuit board.
The invention also provides a measuring method of the laser millimeter wave integrated radar level gauge, which adopts any one of the laser millimeter wave integrated radar level gauge, and comprises the following steps:
the millimeter wave radar module measures the level: the millimeter wave radar module transmits millimeter waves and receives echo signals for measurement to obtain first material level information;
the laser radar module measures the material level: the laser radar module transmits laser and receives echo signals to measure and obtain second object information;
Comparison analysis: the first material level information measured by the millimeter wave radar module, the second material level information measured by the laser radar module and the respective signal to noise ratios are respectively sent to the comparison analysis module, and the comparison analysis module selects relatively correct and accurate material level results based on the respective parameters of the millimeter wave radar module and the laser radar module.
Preferably, the parameters of the millimeter wave radar module and the laser radar module comprise the respective measuring range, dead zone and signal to noise ratio threshold.
Compared with the prior art, the invention has the beneficial effects that: 1. the laser millimeter wave integrated radar level meter is provided with a millimeter wave radar module, a laser radar module and a comparison analysis module, wherein the millimeter wave radar module and the laser radar module are complementary, and can accurately measure the level information under different working conditions to obtain a more stable level measurement result. The millimeter wave radar module is wider along with the increase of the measuring distance, if the millimeter wave radar module measures in a smaller space, the millimeter wave radar module can encounter the reflection echoes of obstacles such as side walls and the like, so that errors or even errors are generated in measurement, the laser radar module is extremely narrow, the problem encountered by the millimeter wave radar can be avoided, and the measuring result of the laser radar module can be adopted under the condition. The laser radar can generate larger effects such as reflection and refraction on light under the environment with dust and fog, and can not work stably, and the millimeter wave radar module measuring result can be adopted under the condition. 2. In the installation site of the radar level gauge, the orientation of millimeter wave radar beams is not well debugged and is not visual, and the laser radar module can be used for visual auxiliary installation at the moment, so that the installation azimuth of the radar level gauge is accurate. 3. In different working environments, the noise floor is different, the signal to noise ratio of the millimeter wave radar module and the laser radar module is different, and under the condition, the measuring result in the effective range of the signal to noise ratio can be adopted.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
Fig. 1 is a schematic diagram of an internal structure of an embodiment of a laser millimeter wave integrated radar level gauge according to the present invention.
Fig. 2 is a schematic structural diagram of a first circuit board in an embodiment of the laser millimeter wave integrated radar level gauge according to the present invention.
In the drawings, each reference numeral is intended to: the device comprises a shell 1, a dust cover 11, a first circuit board 2, a millimeter wave radar chip 21, a millimeter wave transmitting antenna 22, an echo receiving antenna 23, an optical path channel 24, a second circuit board 3, a third circuit board 4 and a lens 5.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment, a laser millimeter wave integrated radar level gauge is provided, as shown in fig. 1, the laser millimeter wave integrated radar level gauge comprises a housing 1, a dust cover 11 is arranged at the bottom of the housing 1, a millimeter wave radar module, a laser radar module and an comparison analysis module are arranged in the housing 1, wherein the millimeter wave radar module and the laser radar module are electrically connected to the comparison analysis module, so that data measured by the millimeter wave radar module and the laser radar module can be sent to the comparison analysis module for comparison analysis.
The millimeter wave radar module is used for transmitting millimeter waves and receiving echo signals to measure and obtain first material level information. As shown in fig. 1 and 2, the millimeter wave radar module includes a first circuit board 2, a millimeter wave radar chip 21, a millimeter wave transmitting antenna 22 and an echo receiving antenna 23 are disposed on the first circuit board 2, the millimeter wave transmitting antenna 22 and the echo receiving antenna 23 adopt patch antennas, the millimeter wave transmitting antenna 21 and the echo receiving antenna 23 are board-mounted antennas, the millimeter wave radar chip 21 is configured with peripheral circuits such as a clock circuit and a filter circuit, the millimeter wave transmitting antenna 22 and the echo receiving antenna 23 are electrically connected with the millimeter wave radar chip 21, the millimeter wave radar chip 21 controls the millimeter wave transmitting antenna 22 to transmit millimeter waves, the echo receiving antenna 23 receives echo signals of the millimeter waves and transmits the echo signals to the millimeter wave radar chip 21, the millimeter wave radar chip 21 measures first level information accordingly, and the first level information is a result to be measured by the radar level meter.
The laser radar module is used for transmitting laser and receiving the echo signal to measure and obtain second object information. As shown in fig. 1, the laser radar module includes a second circuit board 3, and a driving circuit, a laser emitter, a laser receiver and a laser signal processing circuit are disposed on the second circuit board 3, where the driving circuit is used to control the laser emitter to emit laser, the laser receiver is used to receive a reflected laser signal and transmit the reflected laser signal to the laser signal processing circuit, and the laser signal processing circuit processes the reflected laser signal to obtain second level information, where the second level information and the previous first level information are two measurement information of the same measurement object.
As shown in fig. 1, the second circuit board 3 is located on the upper side of the first circuit board 2, and a lens 5 is further disposed on the lower side of the first circuit board 2, where the lens 5 is a concave-convex mirror, and the lens 5 is used for narrowing the millimeter radar wave beam emitted by the millimeter wave transmitting antenna 22 and narrowing the laser beam emitted by the laser emitter, so that the emitted signal is more concentrated. As shown in fig. 2, an optical path 24 for the laser transmitter transmitting signal and the laser receiver signal is provided on the first circuit board 2, and the optical path 24 is a hole formed in the first circuit board 2.
The comparison analysis module comprises a third circuit board 4, a processor is arranged on the third circuit board 4, the processor adopts a singlechip, and data measured by the millimeter wave radar module and the laser radar module can be sent to the processor for comparison analysis, so that a relatively correct and accurate material level result is obtained.
The laser millimeter wave integrated radar level meter is provided with a millimeter wave radar module, a laser radar module and a comparison analysis module, wherein the millimeter wave radar module and the laser radar module are complementary, and under some working conditions, more stable level measurement results can be obtained. For example, the beam angle of the millimeter wave radar level meter is more than 3 degrees, the beam is wider and wider along with the increase of the measuring distance, if the measuring distance is measured in a smaller space, the reflected echoes of obstacles such as side walls and the like are encountered, so that errors or even errors are generated in the measuring process, the laser radar beam is extremely narrow, the problems encountered by the millimeter wave radar can be avoided, and the measuring result of the laser radar module can be adopted under the condition. However, the laser radar can generate larger effects such as reflection and refraction on light in the environment with dust and fog, and cannot work stably, and the millimeter wave radar module measuring result can be adopted under the condition. In addition, in the installation site of the radar level gauge, the orientation of millimeter wave radar beams is not well debugged and is not visual, and the laser radar module can be used for visual auxiliary installation at the moment, so that the installation azimuth of the radar level gauge is accurate.
In one embodiment, a method for measuring a laser millimeter wave integrated radar level gauge is provided, the method employing the foregoing laser millimeter wave integrated radar level gauge, the method comprising the steps of:
(1) The millimeter wave radar module measures the level: the millimeter wave radar module transmits millimeter waves and receives the echo signals to measure and obtain first material level information.
The millimeter wave radar module measures the first material level information and records the signal to noise ratio of the corresponding echo signal.
(2) The laser radar module measures the material level: the laser radar module transmits laser and receives the echo signal to measure and obtain second object information.
The laser radar module measures the second object information and records the signal to noise ratio of the corresponding laser reflection signal.
(3) Comparison analysis: the first material level information measured by the millimeter wave radar module, the second material level information measured by the laser radar module and the respective signal to noise ratios are respectively sent to the comparison analysis module, and the comparison analysis module selects relatively correct and accurate material level results based on the respective parameters of the millimeter wave radar module and the laser radar module.
Here, the parameters of the millimeter wave radar module and the laser radar module include the respective measuring range, dead zone and signal to noise ratio threshold, and if the measured distance is in the dead zone of the millimeter wave radar module, the second physical information measured by the laser radar module is adopted; if the measured distance is in the blind area of the laser radar module, adopting second object information measured by the millimeter wave radar module; if the measured distance is not in the dead zone of the millimeter wave radar module or the dead zone of the laser radar module, comparing the signal to noise ratio of the millimeter wave radar module and the laser radar module, and adopting the material level information with the signal to noise ratio within a threshold range; if the signal to noise ratio of the two is within the threshold value range, the average value of the two is used as the material level information.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A laser millimeter wave integrated radar level gauge is characterized in that: the device comprises a shell, wherein a millimeter wave radar module, a laser radar module and a comparison analysis module are arranged in the shell, the millimeter wave radar module and the laser radar module are electrically connected to the comparison analysis module, the millimeter wave radar module is used for transmitting millimeter waves and receiving echo signals to measure and obtain first level information, the laser radar module is used for transmitting laser and receiving echo signals to measure and obtain second level information, and the comparison analysis module is used for comparing and analyzing the first level information measured by the millimeter wave radar module and the second level information measured by the laser radar module and obtaining relatively correct and accurate level results.
2. The laser millimeter wave integrated radar level gauge according to claim 1, wherein: the millimeter wave radar module comprises a first circuit board, wherein a millimeter wave radar chip, a millimeter wave transmitting antenna and an echo receiving antenna are arranged on the first circuit board, and the millimeter wave transmitting antenna and the echo receiving antenna are onboard antennas.
3. The laser millimeter wave integrated radar level gauge according to claim 2, wherein: the laser radar module comprises a second circuit board, and a driving circuit, a laser emitter, a laser receiver and a laser signal processing circuit are arranged on the second circuit board; and the first circuit board is provided with an optical path channel for the laser transmitter to transmit signals and the laser receiver to transmit signals.
4. The laser millimeter wave integrated radar level gauge according to claim 3, wherein: the second circuit board is located the first circuit board upside still be equipped with the lens in first circuit board downside, the lens is used for narrowing millimeter radar wave beam that millimeter wave transmitting antenna launched, and narrow laser beam that laser emitter launched.
5. The laser millimeter wave integrated radar level gauge according to claim 2, wherein: the millimeter wave transmitting antenna and the echo receiving antenna adopt patch antennas.
6. The laser millimeter wave integrated radar level gauge according to claim 1, wherein: the comparison and analysis module comprises a third circuit board, and a processor is arranged on the third circuit board.
7. A method for measuring a laser millimeter wave integrated radar level gauge according to any one of claims 1 to 6, comprising:
the millimeter wave radar module measures the level: the millimeter wave radar module transmits millimeter waves and receives echo signals for measurement to obtain first material level information;
the laser radar module measures the material level: the laser radar module transmits laser and receives echo signals to measure and obtain second object information;
Comparison analysis: the first material level information measured by the millimeter wave radar module, the second material level information measured by the laser radar module and the respective signal to noise ratios are respectively sent to the comparison analysis module, and the comparison analysis module selects relatively correct and accurate material level results based on the respective parameters of the millimeter wave radar module and the laser radar module.
8. The measurement method of the laser millimeter wave integrated radar level gauge according to claim 7, wherein: the parameters of the millimeter wave radar module and the laser radar module comprise the respective measuring range, dead zone and signal to noise ratio threshold.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311430632.7A CN117970323A (en) | 2023-10-31 | 2023-10-31 | Laser millimeter wave integrated radar level gauge and measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311430632.7A CN117970323A (en) | 2023-10-31 | 2023-10-31 | Laser millimeter wave integrated radar level gauge and measuring method |
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| CN117970323A true CN117970323A (en) | 2024-05-03 |
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| CN202311430632.7A Pending CN117970323A (en) | 2023-10-31 | 2023-10-31 | Laser millimeter wave integrated radar level gauge and measuring method |
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- 2023-10-31 CN CN202311430632.7A patent/CN117970323A/en active Pending
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