CN203011859U - Transmission type microwave moisture detection device - Google Patents
Transmission type microwave moisture detection device Download PDFInfo
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- CN203011859U CN203011859U CN 201320000760 CN201320000760U CN203011859U CN 203011859 U CN203011859 U CN 203011859U CN 201320000760 CN201320000760 CN 201320000760 CN 201320000760 U CN201320000760 U CN 201320000760U CN 203011859 U CN203011859 U CN 203011859U
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Abstract
The utility model relates to a transmission type microwave moisture detection device which is capable of effectively solving the problem of low precision of detecting moisture in coal by adopting a transmission type microwave method. According to the technical scheme, the transmission type microwave moisture detection device comprises belts, a microwave emitter and microwave receivers, wherein the microwave emitter is arranged between the upper belt and the lower belt, the main microwave receiver and the auxiliary microwave receiver are arranged above the upper belt, a horn of the main microwave receiver is opposite to a horn of the microwave emitter, and a horn of the auxiliary microwave receiver and the horn of the main microwave receiver are downwards positioned in the same height and are outwards and aslant arranged on one side of the main microwave receiver. The transmission type microwave moisture detection device is novel, special, simple and reasonable in structure, and good in use effect, and is an innovation on the microwave moisture detection device; and the influence of microwave emitting power change of a generator and air humidity change on the moisture content detecting precision is eliminated, and the precision of detecting the moisture is remarkably improved.
Description
Technical field
The utility model relates to moisture content detection device, especially for a kind of transmission-type microwave moisture content detection device that detects Coal ' moisture on band conveyor.
Background technology
At present, demand diversified according to the coal market, require coal enterprise to produce the coal product of different cultivars, different quality, the key index of categories of coal and quality is ash content, and Coal ' moisture is one of key factor that affects the ash content of coal detection, introduces moisture and will help to improve the ash content detection accuracy when detecting ash content.Adopt at present microwave to detect Coal ' moisture content and reflectometry is arranged, transmission beam method.Detect moisture with reflectometry, require sensor and coal bed of material distance very near, distance is substantially constant, and granularity is relatively even, and this just makes Coal ' moisture detect online the use reflectometry and is extremely restricted.Transmission-type water content detection principle is: during microwave directive material, scattering, reflection, absorption and transmission occur, the microwave power after the material absorbing transmission is decayed.Due to the specific inductive capacity of the water specific inductive capacity much larger than coal, therefore after microwave process coal, the damping capacity of microwave power is main relevant with water cut wherein, linear for moisture in its damping capacity of microwave of special frequency channel and the certain limit in coal, measure microwave and just can calculate moisture in coal through the power attenuation amount after coal.In practice, normally obtain standard moisture by traditional oven drying method, with standard moisture, the computation model that the microwave transmission method detects moisture is revised and scale, finally obtain Coal ' moisture content accurately by detecting the microwave power decay.Practice shows that existing microwave transmission method is in order to make microwave see through the coal bed of material and the power attenuation amount an of the best to be arranged, adopt higher microwave power and selected frequency optimum traffic, at this moment the variation of microwave power stability and airborne humidity is very important on the impact of water content detection accuracy, causes transmission beam method detection Coal ' moisture to contain accuracy of measurement lower.Therefore, a kind of to be subjected to the microwave moisture content detection device that humidity effect is little, precision is high be urgent problem in development.
Summary of the invention
For above-mentioned situation, for overcoming the defective of prior art, the purpose of the utility model just is to provide a kind of transmission-type microwave moisture content detection device, can effectively solve the microwave transmission method and detect the lower problem of Coal ' moisture precision.
The technical scheme that the utility model solves is, comprise belt, microwave emitter and microwave receiver, microwave emitter is contained between belt and lower belt, main microwave receiver and secondary microwave receiver all are contained in above belt, the hydraucone of main microwave receiver is relative with the hydraucone of microwave emitter, the hydraucone of secondary microwave receiver and the hydraucone of main microwave receiver are positioned at sustained height downwards, are an outward-dipping side that is contained in main microwave receiver.
The utility model novel structure is unique, advantages of simple has been got rid of due to the impact on the determination of moisture precision of generator microwave transmit power variation, air humidity varies, has significantly improved the precision of water content detection, result of use is good, is the innovation on the microwave moisture content detection device.
Description of drawings
Fig. 1 is structural drawing of the present utility model.
Fig. 2 is fundamental diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Provided by Fig. 1, the utility model comprises belt, microwave emitter and microwave receiver, microwave emitter 4 is contained between belt 3 and lower belt 5, main microwave receiver 1 and secondary microwave receiver 6 all are contained in belt 3 tops, the hydraucone of main microwave receiver 1 is relative with the hydraucone of microwave emitter 4, the hydraucone of secondary microwave receiver 6 and the hydraucone of main microwave receiver 1 are positioned at sustained height downwards, are an outward-dipping side that is contained in main microwave receiver 1.
For guaranteeing result of use, the hydraucone of described microwave emitter 4 is greater than the hydraucone of main microwave receiver 1;
The distance of the hydraucone of described microwave emitter 4 and upper belt 3 is 3-5cm;
The bell-mouthed distance of the hydraucone of described microwave emitter 4 and main microwave receiver 1, secondary microwave receiver 6 is 40-60cm;
The bell-mouthed limit of described main microwave receiver 1 section straight line extended line is positioned at the marginal position (seeing shown in Fig. 1 dotted line) of the coal bed of material 2 on belt 3.
When the utility model uses, microwave emitter 4 is placed under the coal bed of material 2 on belt 3, the microwave signal that microwave source produces passes to microwave emitter 4 through isolator, directional coupler, phase shifter, attenuator and isolator successively and launches, main microwave receiver 1 and secondary microwave receiver 6 receive microwave and pass to signal processor and process through isolator, amplifier, wave detector successively respectively, import at last man-machine interface into.The microwave signal that microwave source produces is wherein a part of through High Resolution Phase Shift Circuit, precision attenuator input signal processor (as shown in Figure 2) after isolator, directional coupler.Microwave emitter is contained between upper and lower belt, and main microwave receiver is contained in the top of belt, and main microwave receiver is relative with the hydraucone of microwave emitter, and secondary microwave receiver is positioned at main receiver one side and main receiver at sustained height above upper belt.The hydraucone of microwave emitter makes the microwave part of its emission through the laggard microwave receiver of becoming owner of of the coal bed of material 2 attenuations by absorption greater than the hydraucone of receiver, and a part enters secondary microwave receiver without the coal bed of material.Microwave emitter and upper belt keep 3 ~ 5 cm distance, do not contact upper belt distance when moving with belt the smaller the better, under major and minor microwave receiver hydraucone along and microwave emitter between the distance between 40 ~ 60 centimetres, the hydraucone of secondary microwave receiver not with the transmitter hydraucone over against, an and outward-dipping angle, purpose is the microwave that receives without the decay of the coal bed of material, and this angle will be according to the coal bed of material width adjustment on belt feeder.Main microwave receiver receives the microwave that sees through the decay of the coal bed of material, and detection is processed, the AD sampling, then calculates moisture according to the moisture computation model.Secondary microwave receiver receives and does not see through the part microwave that the coal bed of material does not have decay, and its microwave power that receives sends the proportional variation of microwave power with transmitter, with the humidity size linear change of air.The secondary microwave receiver microwave signal of instrument real-time sampling, revise in real time the null value data of moisture computing according to this signal, got rid of due to the impact on the determination of moisture precision of microwave emitter microwave transmit power variation, air humidity varies, significantly improved the precision of water content detection.
Claims (5)
1. transmission-type microwave moisture content detection device, comprise belt, microwave emitter and microwave receiver, it is characterized in that, microwave emitter (4) is contained between belt (3) and lower belt (5), main microwave receiver (1) and secondary microwave receiver (6) all are contained in above belt (3), the hydraucone of main microwave receiver (1) is relative with the hydraucone of microwave emitter (4), the hydraucone of secondary microwave receiver (6) and the hydraucone of main microwave receiver (1) are positioned at sustained height downwards, are an outward-dipping side that is contained in main microwave receiver (1).
2. transmission-type microwave moisture content detection device according to claim 1, is characterized in that, the hydraucone of described microwave emitter (4) is greater than the hydraucone of main microwave receiver (1).
3. transmission-type microwave moisture content detection device according to claim 1, is characterized in that, the distance of the hydraucone of described microwave emitter (4) and upper belt (3) is 3-5cm.
4. transmission-type microwave moisture content detection device according to claim 1, is characterized in that, the bell-mouthed distance of the hydraucone of described microwave emitter (4) and main microwave receiver (1), secondary microwave receiver (6) is 40-60cm.
5. transmission-type microwave moisture content detection device according to claim 1, is characterized in that, described main microwave receiver (1) bell-mouthed limit section straight line extended line is positioned at the marginal position of the coal bed of material (2) on belt (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320000760 CN203011859U (en) | 2013-01-05 | 2013-01-05 | Transmission type microwave moisture detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320000760 CN203011859U (en) | 2013-01-05 | 2013-01-05 | Transmission type microwave moisture detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203011859U true CN203011859U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320000760 Expired - Fee Related CN203011859U (en) | 2013-01-05 | 2013-01-05 | Transmission type microwave moisture detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203011859U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202800A (en) * | 2017-05-25 | 2017-09-26 | 四川莱源科技有限公司 | Suitable for the water analysis sensing device of yarn fabric |
| CN107273615A (en) * | 2017-06-15 | 2017-10-20 | 东华大学 | A kind of ultra-wideband microwave humidity detection method based on machine learning |
| US10422742B2 (en) | 2017-10-18 | 2019-09-24 | The Boeing Company | Moisture detection system |
| CN110596152A (en) * | 2019-09-16 | 2019-12-20 | 安徽大洋自动化科技有限公司 | Intelligent detection device for grain moisture volume weight |
| US10656081B2 (en) | 2017-10-18 | 2020-05-19 | The Boeing Company | Synchronized phased array and infrared detector system for moisture detection |
-
2013
- 2013-01-05 CN CN 201320000760 patent/CN203011859U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202800A (en) * | 2017-05-25 | 2017-09-26 | 四川莱源科技有限公司 | Suitable for the water analysis sensing device of yarn fabric |
| CN107273615A (en) * | 2017-06-15 | 2017-10-20 | 东华大学 | A kind of ultra-wideband microwave humidity detection method based on machine learning |
| US10422742B2 (en) | 2017-10-18 | 2019-09-24 | The Boeing Company | Moisture detection system |
| US10656081B2 (en) | 2017-10-18 | 2020-05-19 | The Boeing Company | Synchronized phased array and infrared detector system for moisture detection |
| CN110596152A (en) * | 2019-09-16 | 2019-12-20 | 安徽大洋自动化科技有限公司 | Intelligent detection device for grain moisture volume weight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20180105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |