Non-contact type electromagnetic wave switch for detecting material level in silo and detecting method of electromagnetic wave
A non-contact, electromagnetic wave technology, used in measurement devices, engine lubrication, liquid/fluid solid measurement, etc., can solve problems such as inappropriate use and changes
Active Publication Date: 2012-11-21
邵小欧
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Problems solved by technology
However, since ultrasonic is a mechanical wave, its wave speed changes with temperature, so there are problems in material detection under high temperature and large temperature change conditions.
Moreover, it is not suitable to use when there is a lining on the warehouse wall and there is a gap between the outer wall and the inner lining.
In use, there is also maintenance work that requires constant addition of adhesives
Method used
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[0031] Below in conjunction with accompanying drawing, the present invention is further described:
[0032] Such as Figure 1 to Figure 8 , an electromagnetic wave switch for non-contact detection of the material level of the silo, the switch includes a directional electromagnetic wave transmitting unit 1 and a magnetic wave receiving unit 2, the magnetic wave transmitting unit 1 and the directional electromagnetic wave receiving unit 2 are located at the required measurement height of the silo At the same level, the electromagnetic wave transmitter 1 and the electromagnetic wave receiver 2 are respectively installed on the silo walls 3 on both sides outside the silo, and an electromagnetic wave channel 4 is constructed between the directional electromagnetic wave transmitting unit 1 and the directional electromagnetic wave receiving unit 2 .
[0033] The silo wall 3 is a metal shell or a non-metallic inner lining of a metal shell.
[0034] The frequency of electromagnetic wa...
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The invention discloses a non-contact type electromagnetic wave switch for detecting the material level in a silo, which is characterized in that the switch comprises a directed electromagnetic wave transmitting unit (1) and an electromagnetic wave receiving unit (2); the electromagnetic wave transmitting unit (1) and the directed electromagnetic wave receiving unit (2) are located on the same height as the silo required to be measured; the electromagnetic wave transmitting unit (1) and the electromagnetic wave receiving unit (2) are respectively mounted on silo walls (3) on two sides at the outer part of the silo; and an electromagnetic wave channel (4) is constructed between the directed electromagnetic wave transmitting unit (1) and the directed electromagnetic wave receiving unit (2). Compared with the ultrasonic wave technical scheme disclosed by China Patent CN102322920A, the electromagnetic wave switch is not influenced by medium temperature, has little to do with the thickness of the silo wall, and does not require additional after-sales guarantees such as adhesives.
Description
technical field [0001] The invention relates to the field of material level detection, in particular to an electromagnetic wave switch for non-contact detection of material level in a silo and a detection method thereof, especially for a non-metallic material or a metal shell and a non-metallic lining as a silo wall In a silo and a container, a material level detection method and device. Background technique [0002] In industrial production, many silos are widely used to store raw materials, produce intermediates and finished products, and silos or containers in the production process. The storage status in the silo, that is, the material level, generally needs to be measured, one of which is continuous measurement, and the other is upper and lower limit measurement. [0003] Material level continuity measurement is to continuously measure the material level value in the silo. [0004] Another way to measure the material level of the silo is called the upper and lower lim...
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IPC IPC(8): G01F23/284
Inventor 邵小欧
Owner 邵小欧