CN206095359U - Multi -frequency radar charge level indicator - Google Patents
Multi -frequency radar charge level indicator Download PDFInfo
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- CN206095359U CN206095359U CN201621092486.7U CN201621092486U CN206095359U CN 206095359 U CN206095359 U CN 206095359U CN 201621092486 U CN201621092486 U CN 201621092486U CN 206095359 U CN206095359 U CN 206095359U
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Abstract
The utility model discloses a multi -frequency radar charge level indicator, including arithmetic processor, antenna component and corresponding at least two frequency electromagnetic electromagnetic wave transceiver, the electromagnetic wave transceiver for the corresponding echo signal who returns is received to electromagnetic wave through the at least two frequency of antenna component transmission, arithmetic processor for all echo signal that send according to the electromagnetic wave transceiver obtain material level information. The utility model discloses differently when utilizing different frequency electromagnetic wave contact material pierce through, absorb, physics difference performances such as reflection, diffraction, calculate different frequency electromagnetic wave echo signal data through synthesizing, realize the accurate measurement to material level, show promotion electromagnetic wave charge level indicator material level measuring accuracy and reliability under abominable, complex environment such as big humidity, high dust and under the material complex surface circumstances.
Description
Technical field
This utility model is related to level gauging field, more particularly to a kind of multi-frequency radar level gauge.
Background technology
Electromagnetic wave level-sensing device is widely used in various industrial circles, is one of level-sensing device form of current main flow.Electromagnetism
Ripple level-sensing device realizes the measurement to level of filler material using analysis to the time response or frequency characteristic of the electromagnetic wave of material transmitting.
By electromagnetic radiation and the Doppler effect for receiving time difference or electromagnetic wave, obtain material position information, technology increasingly into
It is ripe.But, due to many industry spot and bad environments in measured container, foam of dust, steam and liquid surface etc.
Complex environment, and surface of material is complex-shaped, be also exactly container inner wall itself, measurement space other equipment exist etc. because
Element so that the actual measurement effect of electromagnetic wave level-sensing device is poor.As wave frequency is higher, direction is better, it is all in recent years, electromagnetism
Ripple level-sensing device constantly realizes the accuracy and reliability of measurement by lifting frequency.In actual industrial scene, frequency electromagnetic waves material
The frequency of position meter is had evolved to the 24GHz and 26GHz of current main flow by past GHz more than 10.Simultaneously as echo analysis handss
The lifting of section and equipment, for echo analysis under specific environment, by the screening conditions for optimizing echo information, is also obviously improved
The reliability and accuracy of the measurement of electromagnetic wave material position.
But, although frequency electromagnetic waves have the characteristics of direction is good, and energy is concentrated, deal with material complex surface ability excellent by force
Gesture, but its penetration capacity is poor, the factor shadow such as lifting, dust and foam in actual industry spot is due to measuring environment
Ring, existing frequency electromagnetic waves level-sensing device practical effect is poor, wrong report is frequent, or even cannot complete reliable measurements, serious shadow
The popularization of electromagnetic wave level-sensing device is rung and has used.
Low-frequency electromagnetic wave level-sensing device is big due to launch angle, it is difficult to control in a little scope, usual electromagnetic wave is sent out
Firing angle degree is more than 15 degree, after electromagnetic radiation, echo complexity, especially inside the container in the vertical direction in electromagnetic radiation direction
Apart from little situation, container itself is complicated to reflection of electromagnetic wave.Low-frequency electromagnetic wave level-sensing device is generally transported in open in comparison
The measurement of liquid level in space.
Existing frequency electromagnetic waves level-sensing device and low-frequency electromagnetic wave level-sensing device in actual measurement, especially in narrow vessel
The accurate poor and poor reliability of the level gauging under portion and complex environment.Limit more widely using for electromagnetic wave level-sensing device.
Utility model content
The purpose of this utility model is to provide a kind of multi-frequency radar level gauge, to solve in prior art, electromagnetic wave
The accuracy difference and the problem of poor reliability of level gauging of the level-sensing device inside narrow vessel and under complex environment.
This utility model provides a kind of multi-frequency radar level gauge, including arithmetic processor, antenna element and correspondence
The electromagnetic wave transceiver of at least two frequency electromagnetics；
The electromagnetic wave transceiver, the electromagnetic wave reception for being launched at least two frequencies by the antenna element are returned
The corresponding echo-signal returned；
The arithmetic processor, all echo-signals for being sent according to the electromagnetic wave transceiver carry out computing and obtain
To material position information.
Preferably, the frequency of the electromagnetic wave of electromagnetic wave transceiver transmitting, have at least one not less than 20GHz and have to
Few one is not more than 10GHz.
Preferably, the electromagnetic wave transceiver includes at least two electromagnetic wave transceiver units, and all electromagnetic waves are received
At least two electromagnetic wave transceiver unit same antennas of correspondence in part are sent out, the different electromagnetic wave transceiver unit correspondences are a kind of
The electromagnetic wave of different frequency.
Preferably, the multi-frequency radar level gauge also includes switching part, for the difference corresponding to the same antenna
The electromagnetic wave transceiver unit is switched over.
Preferably, the arithmetic processor is connected with the switching part, for controlling the switching part to the electricity
The switching of magnetic wave transceiver unit.
Preferably, the electromagnetic wave transceiver includes at least two electromagnetic wave transceiver units, the antenna element include with
The electromagnetic wave transceiver unit quantity identical antenna, and the electromagnetic wave transceiver unit and antenna one-to-one corresponding, the electromagnetism
A kind of electromagnetic wave of different frequency of ripple transceiver unit correspondence.
Preferably, the antenna in the antenna element is bell-mouth antenna and/or micro-strip plate aerial and/or lens day
Line.
Preferably, the multi-frequency radar level gauge also includes the swing part being connected with the antenna in the antenna element
Part, the tilting member are used to drive antenna to change direction.
On the other hand this utility model also discloses another kind of multi-frequency radar level gauge, including arithmetic processor, antenna
Part and electromagnetic wave transceiver, the multi-frequency radar level gauge have at least two mode of operations；
In the first operational mode, the electromagnetic wave transceiver launches at least two frequencies by the antenna element
Electromagnetic wave simultaneously receives the institute that the corresponding echo-signal and the arithmetic processor of return are sent according to the electromagnetic wave transceiver
There is echo-signal to carry out computing and obtain material position information；
In a second mode of operation, the electromagnetic wave transceiver launches a kind of electromagnetism of frequency by the antenna element
Ripple simultaneously receives the echo letter that the corresponding echo-signal and the arithmetic processor of return are sent according to the electromagnetic wave transceiver
Number carrying out computing obtains material position information.
This utility model is by launching the electromagnetic wave of different frequency to material, and utilizes the multiple echo-signals for reflecting
Material position information is calculated, compared to existing technology, even if inside narrow vessel and under complex environment, also can enter to thing position material position
Row more accurately and is reliably measured.
It is further to be combined from high and low frequency, comprehensively utilize the height of the directivity and low-frequency electromagnetic wave of frequency electromagnetic waves
Penetrance, by the comprehensive computing to height different frequency echo, realizes the measurement to level of filler material；It is obviously improved electromagnetic wave material
Position meter is big humidity, high dust etc. be severe, under complex environment and in the case of material complex surface the accuracy of level gauging and
Reliability.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is electromagnetic wave level-sensing device principle schematic of the prior art；
Fig. 2 is the level-sensing device structure chart in this utility model embodiment one；
Fig. 3 is the level-sensing device structure chart in this utility model embodiment two；
Fig. 4 is the level-sensing device structure chart in this utility model embodiment three；
Fig. 5 is the level-sensing device structure chart in this utility model example IV；；
Fig. 6 is level of filler material measuring method flow chart of this utility model based on multi-frequency radar level gauge.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, below in conjunction with the application reality
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described enforcement
Example is only some embodiments of the present application, rather than the embodiment of whole.Based on the embodiment in the application, this area is common
The every other embodiment obtained under the premise of creative work is not made by technical staff, should all belong to the application protection
Scope.
First the operation principle of electromagnetic wave level-sensing device is briefly described.Electromagnetic wave level-sensing device in the state of ideal,
Launch electromagnetic wave to material, preferable echo is：Electromagnetic wave runs into material, reflects an electromagnetic wave echo-signal, by electromagnetic wave
The electromagnetic wave transceiver unit of level-sensing device is received, and arithmetic processor is by calculating transmitting electromagnetic wave and receiving echo-signal afterwards
Between time difference, according to propagation velocity of electromagnetic wave and time again divided by 2, obtain between electromagnetic wave level-sensing device and material away from
From.Equally, if according to Doppler effect, being exactly that arithmetic processor calculates the frequency for launching electromagnetic wave, and echo electromagnetism wave frequency
Rate, obtains the distance of material electromagnetic wave level-sensing device and material.But, during the situation of reality, many industry spot are particularly in container
Full of airborne dust or due to blowing, there is lifting phenomenon, and the structure of container itself in portion, bad environments, bank face is answered
It is miscellaneous etc., the reflected signal of material is not only run in resulting in echo-signal comprising electromagnetic wave, also includes airborne dust, lifting,
Container inner wall, equipment in container, heap face complexity cause the echo-signals such as Multipath reflection.In these complicated echo-signals,
Find the effective echo difficulty of accurate material position very big.Existing way is, for echo-signal is particularly the electricity that echo is generated
Die mould signal carries out the setting of upper and lower value, and in distinguishing echo-signal, those are interference echo, and those are actually active echo.This
Distinguish a part of interference echo to a certain extent.The electromagnetic wave of different frequency presents larger thing when material is run into
Reason performance.Frequency electromagnetic waves penetrance is poor, therefore is easily disturbed by greater density dust or airborne dust in measurement space, its
The ultrasonic echo feature of the reflection of the interfering material such as dust in the echo of return is strong, but its launch angle is little, direction is good, can quantity set
In, therefore the interference echo feature that the interference echo or container inner wall that rarely container is reflected back causes is little.And low frequency electromagnetic
Wave reflection angle is big, it is difficult to control in a little scope, therefore very likely reflects containing container in the echo of its return
The interference echo for returning, and when material is away from electromagnetic emission point, this interference echo is bigger, but its penetrance is good, because
In the echo of this its return, few echo containing reflections such as dusts or such interference echo feature are little.
Analysis high frequency echo as shown in Figure 1 and low frequency echo sketch.As shown in figure 1, returning for effective between k1 and k2
Ripple, it can be seen that in high frequency echo signal, when running into greater density airborne dust or lifting, P2 echoes letter in echo time point T2
Number all fall with P3 echo-signals in echo time point T3 interval in screening, be so difficult to distinguish P2 and P3 who is real material position
Echo.Simultaneously in low-frequency electromagnetic wave echo-signal, due to low-frequency electromagnetic wave as launch angle is big, easily it is subject to inside container
Impact, produce the echo-signal such as P4, rise and fall in screening is interval with P3 mono-.If singly seeing high frequency echo or low frequency echo
It is difficult to find real material position echo point.
Therefore, can comprehensive analysis this two kinds of echo-signals, by the echo-signal having in the case of two kinds and characteristic remarkable
Signal, be defined as material return effective echo-signal.As shown in figure 1, we can be had found at the same time T3 moment, have same
The significant echo-signal of sample.Through logical judgment, we may determine which is real material position echo.So as to level-sensing device can be with standard
Really judge material position.Based on above-mentioned principle, this utility model provides a kind of multi-frequency radar level gauge, by launching two kinds of different frequencies
The electromagnetic wave signal of rate calculates material position with the comprehensive multiple echo-signals being reflected back to material.
Embodiment one
As shown in Figure 2, there is provided a kind of multi-frequency radar level gauge, including arithmetic processor 11, antenna element 12 and
The electromagnetic wave transceiver 13 of at least two frequency electromagnetics of correspondence.
Electromagnetic wave transceiver 13, for launching the electromagnetic wave of at least two frequencies by antenna element 12 and receiving return
Correspondence echo-signal；Arithmetic processor 11, all echo-signals for being sent according to electromagnetic wave transceiver 13 obtain material position
Information.
In this utility model, at least a kind of frequency electromagnetic waves in the electromagnetic wave that electromagnetic wave transceiver 13 sends are a kind of low
Frequency electromagnetic waves, with the advantage of comprehensive two kinds of electromagnetic waves, realize best effect.
In specific embodiment, the frequency of at least one electromagnetic wave is not less than 20GHz and has at least one wave frequency
No more than 10GHz.
Embodiment two
As shown in figure 3, in this embodiment, electromagnetic wave transceiver includes at least two electromagnetic wave transceiver units 21 (in Fig. 3
For 2), and at least two same antennas 22 of correspondence of electromagnetic wave transceiver unit 21 in all electromagnetic wave transceiver units 21
(in Fig. 3, antenna element only includes an antenna), the electromagnetic wave and each electricity of a kind of each frequency of electromagnetic wave transceiver unit correspondence
The corresponding frequency of magnetic wave transceiver unit is different from each other.Arithmetic processor 23 is for according to all electromagnetic wave transceiver units 21
The echo-signal sent is calculated material position information.
In this utility model preferred embodiment, same antenna 22 of all correspondences of electromagnetic wave transceiver unit 21 so owns
The launch angle of electromagnetic wave is identical, it is possible to increase the accuracy of material position.Certainly, in this case, needing should for antenna pair
The electromagnetic wave transceiver unit 21 being operated is switched over.Therefore, in this utility model, level-sensing device also includes switching part 24,
For switching over to the different electromagnetic wave transceiver units 21 corresponding to the same antenna.
Embodiment three
In embodiment two, switching part can decide whether switch over and switch to which electromagnetic wave is received and dispatched in its sole discretion
Part, now needs the preset switch logic in switching part, to be smoothed out switching.
As shown in figure 4, this utility model embodiment three from the different of embodiment two is, arithmetic processor 31 and switching part
Part 34 is connected, and arithmetic processor 31 in addition to material position is calculated is additionally operable to control the electromagnetism of 34 pairs of correspondence same antennas 33 of switching part
Ripple transceiver unit 32 is switched over.
Such to be advantageous in that, arithmetic processor 31 can be controlled to switching part 34 according to the echo-signal for receiving.
Such as when arithmetic processor 31 is currently without echo-signal or invalid echo-signal is received, controllable switching part is not switched to
Next electromagnetic wave transceiver unit 32.With respect to the mode that switching part voluntarily switches, which can be with reference to the situation of echo-signal
Switch over so that switching more conforms to needs.
Example IV
As shown in figure 5, in this utility model example IV, electromagnetic wave transceiver includes at least two electromagnetic wave transceiver units
41, antenna element includes and 41 quantity identical antenna 42 of electromagnetic wave transceiver unit, and electromagnetic wave transceiver unit 41 and antenna 42
Correspond, a kind of electromagnetic wave of different frequency of electromagnetic wave transceiver unit correspondence.Arithmetic processor 43 is for according to all electromagnetism
The echo-signal that ripple receiving and transmitting part 41 sends is calculated material position information.
This utility model example IV from the different of embodiment two is, 42 1 a pair of electromagnetic wave transceiver unit 41 and antenna
Should, need not switch over.
In this utility model, multi-frequency radar level gauge may also include the swing part being connected with the antenna in antenna element
Part, tilting member are used to drive antenna to change direction.Such as in example IV, by tilting member drive antenna change direction with
So that antenna launch angle is identical.
This utility model, the antenna in above-mentioned antenna element can be bell-mouth antenna and/or micro-strip plate aerial and/or
Lens antenna.
In this utility model, the multi-frequency radar level gauge may also include output block and/or display unit, described defeated
Go out part to be connected with arithmetic processor, for by pulse signal and/or switching signal and/or data signal and/or wireless communication
Level signals are transferred out by number form, and the display unit is display lamp, liquid crystal display etc., be can be used for result or state
Indicated or shown.
This utility model is not particularly limited to this.
Embodiment five
This utility model embodiment five provides a kind of multi-frequency radar level gauge, including arithmetic processor, antenna element
And electromagnetic wave transceiver, the multi-frequency radar level gauge is with least two mode of operations；
In the first operational mode, the electromagnetic wave transceiver launches at least two frequencies by the antenna element
Electromagnetic wave simultaneously receives the institute that the corresponding echo-signal and the arithmetic processor of return are sent according to the electromagnetic wave transceiver
There is echo-signal to carry out computing and obtain material position information；
In a second mode of operation, the electromagnetic wave transceiver launches a kind of electromagnetism of frequency by the antenna element
Ripple simultaneously receives the echo letter that the corresponding echo-signal and the arithmetic processor of return are sent according to the electromagnetic wave transceiver
Number carrying out computing obtains material position information.
Such as, when all part normal works of level-sensing device, level-sensing device can work in the first operational mode, work as material position
The part electromagnetic wave transceiver unit failure of meter, when can only send a kind of frequency electromagnetic, can make level-sensing device be operated in second mould
Under formula, computing is carried out with the electromagnetic wave signal being reflected back according to same frequency and obtains material position.
With regard to the switching of mode of operation, can carry out automatically also manually can carrying out, this utility model is not particularly limited.
Embodiment six
As shown in fig. 6, this utility model additionally provides a kind of level of filler material based on above-mentioned multi-frequency radar level gauge surveying
Amount method, as a example by launching the electromagnetic wave of two kinds of frequencies, the measuring method comprises the steps：
S11：, to material measurement material direction transmitting first frequency electromagnetic wave, described first is electric for first electromagnetic wave transceiver unit
Magnetic wave transceiver unit receives material and reflects first frequency electromagnetic wave echo-signal；
S12：First frequency electromagnetic wave echo-signal is transferred to described by the first electromagnetic wave transceiver unit in electrical signal form
Arithmetic processor；
S13：, to material measurement material direction transmitting second frequency electromagnetic wave, described second is electric for second electromagnetic wave transceiver unit
Magnetic wave transceiver unit receives material and reflects second frequency electromagnetic wave echo-signal；
S14：Second frequency electromagnetic wave echo-signal is transferred to by the second electromagnetic wave transceiver unit in electrical signal form
The arithmetic processor；
S15：The arithmetic processor, comprehensive first frequency electromagnetic wave echo-signal, second frequency electromagnetic wave echo-signal,
According to default mathematical model and/or logical judgment, the material position of material is generated.
Above to launch the measuring method of the electromagnetic wave of two kinds of frequencies, when the electromagnetic wave for launching two or more frequency
When, comprise the steps：
S21：The electromagnetic wave transceiver launches the electromagnetic wave of a certain frequency, institute by the antenna element to material direction
State electromagnetic wave transceiver to receive corresponding electromagnetic wave echo-signal that the material reflects and believe the electromagnetic wave echo
Number the arithmetic processor is transferred in electrical signal form；
S22：Electromagnetic wave transceiver repeat the above steps S21 at least one times, and the every time frequency of the electromagnetic wave of transmitting
It is different；
S23：The arithmetic processor, carries out process computing according to all electromagnetic wave echo-signals, obtains the thing
The material position of material.
Said method embodiment can be found in device embodiment, and detail is not repeated.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application have it is many deformation and
Change is without deviating from spirit herein, it is desirable to which appended claim includes these deformations and changes without deviating from the application's
Spirit.
Claims (9)
1. a kind of multi-frequency radar level gauge, it is characterised in that including arithmetic processor, antenna element and correspondence at least two
The electromagnetic wave transceiver of frequency electromagnetic；
The electromagnetic wave transceiver, for launching the electromagnetic wave of at least two frequencies by the antenna element and receiving return
Correspondence echo-signal；
The arithmetic processor, all echo-signals for being sent according to the electromagnetic wave transceiver obtain material position information.
2. multi-frequency radar level gauge according to claim 1, it is characterised in that the electricity of the electromagnetic wave transceiver transmitting
The frequency of magnetic wave, has at least one not less than 20GHz and has at least one to be not more than 10GHz.
3. multi-frequency radar level gauge according to claim 1, it is characterised in that the electromagnetic wave transceiver is included at least
In two electromagnetic wave transceiver units, and all electromagnetic wave transceiver units, at least two electromagnetic wave transceiver unit correspondences are same
Root antenna, the different electromagnetic wave transceiver units correspond to a kind of electromagnetic wave of different frequency.
4. multi-frequency radar level gauge according to claim 3, it is characterised in that the multi-frequency radar level gauge is also wrapped
Switching part is included, for switching over to the different described electromagnetic wave transceiver unit corresponding to the same antenna.
5. multi-frequency radar level gauge according to claim 4, it is characterised in that the arithmetic processor and the switching
Part is connected, for controlling switching of the switching part to the electromagnetic wave transceiver unit.
6. multi-frequency radar level gauge according to claim 1, it is characterised in that the electromagnetic wave transceiver is included at least
Two electromagnetic wave transceiver units, the antenna element include and the electromagnetic wave transceiver unit quantity identical antenna, and described
Electromagnetic wave transceiver unit is corresponded with antenna, a kind of corresponding electromagnetic wave of different frequency of the electromagnetic wave transceiver unit.
7. multi-frequency radar level gauge according to claim 1, it is characterised in that the antenna in the antenna element is loudspeaker
Mouth antenna and/or micro-strip plate aerial and/or lens antenna.
8. multi-frequency radar level gauge according to claim 1, it is characterised in that the multi-frequency radar level gauge is also wrapped
The tilting member being connected with the antenna in the antenna element is included, the tilting member is used to drive antenna to change direction.
9. a kind of multi-frequency radar level gauge, it is characterised in that receive and dispatch including arithmetic processor, antenna element and electromagnetic wave
Device, the multi-frequency radar level gauge have at least two mode of operations；
In the first operational mode, the electromagnetic wave transceiver launches the electromagnetism of at least two frequencies by the antenna element
Ripple receive that the corresponding echo-signal and the arithmetic processor of return are sent according to the electromagnetic wave transceiver all times
Ripple signal carries out computing and obtains material position information；
In a second mode of operation, the electromagnetic wave transceiver launches a kind of electromagnetic wave of frequency simultaneously by the antenna element
The corresponding echo-signal and the arithmetic processor for receiving return is entered according to the echo-signal that the electromagnetic wave transceiver sends
Row computing obtains material position information.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621092486.7U CN206095359U (en) | 2016-09-29 | 2016-09-29 | Multi -frequency radar charge level indicator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621092486.7U CN206095359U (en) | 2016-09-29 | 2016-09-29 | Multi -frequency radar charge level indicator |
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| CN206095359U true CN206095359U (en) | 2017-04-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352951A (en) * | 2016-09-29 | 2017-01-25 | 上海沃纳机电设备有限公司 | Multi-frequency radar level gauge and material level measuring method based on same |
| CN107942659A (en) * | 2017-11-10 | 2018-04-20 | 宁夏杰唯智能科技有限公司 | Transmitting device control method and equipment |
| CN110631656A (en) * | 2018-06-21 | 2019-12-31 | 罗斯蒙特储罐雷达股份公司 | Radar level gauge |
-
2016
- 2016-09-29 CN CN201621092486.7U patent/CN206095359U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352951A (en) * | 2016-09-29 | 2017-01-25 | 上海沃纳机电设备有限公司 | Multi-frequency radar level gauge and material level measuring method based on same |
| CN107942659A (en) * | 2017-11-10 | 2018-04-20 | 宁夏杰唯智能科技有限公司 | Transmitting device control method and equipment |
| CN107942659B (en) * | 2017-11-10 | 2024-05-14 | 宁夏杰唯智能科技有限公司 | Transmission device control method and equipment |
| CN110631656A (en) * | 2018-06-21 | 2019-12-31 | 罗斯蒙特储罐雷达股份公司 | Radar level gauge |
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