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Multi-array plane radiation level gauge and measuring method thereof

A material level gauge and front technology, applied in the field of material level gauges, can solve the problems of small measurement range, long response time and large weight of passive nuclear level gauges, so as to solve the problem of inaccurate measurement, reduce radioactive intensity, The effect of improving measurement accuracy

Pending Publication Date: 2019-07-05
上海沃纳机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Poor time characteristics
Due to the long single pulse time of the photomultiplier tube, the response time of the passive nuclear level gauge that generates material level data after a large number of sample calculations is relatively long
When measuring the material level of a container with a relatively fast operation process, even in the fastest response time mode, the measurement data of the passive nuclear material level gauge seriously lags behind the actual working conditions, such as a warehouse pump that feeds in a few seconds and comes out in a few seconds , the passive nuclear level gauge cannot perform real-time control and measurement
[0006] 2. Poor directionality
When measuring the material level, it is impossible to distinguish the actual position of the material level in the container, such as up, down, left, and right. You only know the material level, but you don’t know where the material is.
[0007] 3. Large size and heavy weight
As a result, the actual measurement range of the passive nuclear level gauge is very small
Through multi-probe passive nuclear level gauges or multiple passive nuclear level gauges connected in series to form a large range of measurement, although the measurement range problem is solved, the cost is high

Method used

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  • Multi-array plane radiation level gauge and measuring method thereof
  • Multi-array plane radiation level gauge and measuring method thereof
  • Multi-array plane radiation level gauge and measuring method thereof

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Experimental program
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Embodiment approach 1

[0037] This embodiment provides a multi-surface radiation level gauge, such as figure 1 As shown, it is mainly composed of an operation processor, an output unit, a filter 9, an amplifier 10 and two detection arrays, each detection array is set at a different position in the measurement space according to the measurement requirements; each detection array is composed of Four scintillation crystals 1 and an array-type photoelectric conversion and multiplication unit 2 composed of four micro-devices 5 that can independently complete photoelectric conversion and multiplication. In this embodiment, the array-type photoelectric conversion and multiplication unit 2 preferably uses an array Arranged silicon photomultiplier tubes, microchannel plate photomultiplier tubes, microsphere photomultiplier tubes or avalanche diodes in array layout; four scintillation crystals 1 are coupled with array photoelectric conversion and multiplication components 2, one array photoelectric conversion ...

Embodiment approach 2

[0057] This embodiment is a further improvement of Embodiment 1. The main improvement is that in Embodiment 1, since there are cosmic background radiation noise signals around the scintillation crystal 1, these cosmic background radiation noise signals will lead to the final measured material level data Inaccurate, therefore, in the multi-front radiation level gauge in this embodiment, each detection front also includes a radiation shielding component 6, and the radiation shielding component 6 is preferably a cover made of lead sheet in practical applications. body. The radiation shielding component 6 is used to shield the cosmic background radiation noise signal around the scintillation crystal 1 in the non-measurement direction, so as to make the measurement result of the level gauge more accurate.

[0058] In each detection front, the radiation shielding part 6 can only block the non-radiation receiving parts of the four scintillation crystals 1, such as Figure 7 , or blo...

Embodiment approach 3

[0061] This embodiment is a further improvement of Embodiment 2, such as Figure 10 , in the multi-front radiation level gauge in this embodiment, each detection front also includes a noise shield 7, and the noise shield 7 completely covers any one of the four micro-devices 5. . The main purpose of adding the noise shield 7 is: the arithmetic processor 3 can use the signal generated by the micro-device 5 covered by the noise shield 7 as the background noise signal, and the material level of the generated material in step S4 in the first embodiment In the process of data or image, the background noise signal can be used to correct the signals measured by other micro devices 5, so as to generate more accurate material level related data.

[0062] Apart from this, this embodiment is completely the same as Embodiment 2, and will not be repeated here.

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Abstract

The invention relates to the field of level gauges, and discloses a multi-array plane radiation level gauge and a measuring method thereof. Each detecting array plane is arranged in the different positions in measuring space according to measuring requirements; each detecting array plane includes scintillating crystals and an array type photoelectric conversion and multiplying part, and each arraytype photoelectric conversion and multiplying part consists of at least two micro-devices which can independently accomplish photoelectric conversion and multiplying; the scintillating crystals are coupled to the array type photoelectric conversion and multiplying parts, and each array type photoelectric conversion and multiplying part has at least one electrical signal channel; and each array type photoelectric conversion and multiplying part is connected to the input end circuit of an arithmetic processor at least through one electrical signal channel, and the output end of the arithmetic processor is connected to the input end of an output part. The direction characteristics of a display type radiation detection principle can be fully played, the direction characteristics and spatial resolving power of the level gauge can be significantly enhanced, the measuring scope of the single level gauge can be increased, so that the measuring of the level gauge can be more accurate and reliable.

Description

technical field [0001] The invention relates to the field of material level gauges, in particular to a multi-front radiation level gauge and a measuring method thereof. Background technique [0002] In the field of material level measurement, the non-contact measurement method is not easily affected by harsh environments such as falling material inside the container, high temperature, steam, etc. because it does not contact the material. Compared with radar, laser, ultrasonic, machine vision and other non-contact level gauges that need to be placed inside the container, nuclear level gauges and passive nuclear level gauges are placed outside the container, directly penetrating the container under non-destructive conditions The shell completes the measurement, which is a necessary choice for many working conditions. However, in actual production and application, both the nuclear material level gauge and the passive nuclear material level gauge have certain defects, which can...

Claims

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Application Information

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IPC IPC(8): G01F23/288
CPCG01F23/288
Inventor 胡桂标
Owner 上海沃纳机电设备有限公司