High-temperature sapphire weighing sensor

A weighing sensor, sapphire technology, applied to the detailed information of weighing equipment, weighing equipment using elastically deformable parts, instruments, etc., can solve the problems of only being able to withstand 250°C and the sensor cannot be used, and achieve long-term Good stability, high temperature resistance, and improved temperature sensitivity accuracy

Active Publication Date: 2012-11-14
SHAANXI ELECTRICAL APPLIANCE RES INST
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Problems solved by technology

[0003] The text of Chinese patent announcement 101206135A once disclosed "A Method of Manufacturing a Load Cell for High-Temperature Environments", which uses high-temperature glue to attach strain gauges to produce a load cell for high-temperature environments, but this sensor can only Withstand ambient temperature up to 250°C
If the ambient temperature is higher, the sensor will not be used

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Embodiment Construction

[0032] The content of the present invention will be further described below in conjunction with the accompanying drawings, but the specific implementation forms of the present invention are not limited to the following embodiments.

[0033] Referring to accompanying drawing, the structure of high temperature sapphire load cell of the present invention is as figure 1 As shown, it is composed of a niobium-based alloy elastic body 1, an external circuit board 2, a sensitive component 3, a cable connector 4 and a shell 5.

[0034] The sensitive components in this load cell are structured as figure 2 As shown, it has a sapphire substrate 31 welded on one side of the elastomer 1, and the sapphire substrate 31 is made of single crystal aluminum oxide (such as Al 2 o 3 ) with a total thickness of 40-50 μm; the sapphire substrate 31 is sequentially provided with a strain resistance layer 32 , a welding layer 33 and a passivation protection layer 34 from the inside to the outside. T...

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Abstract

The invention relates to a high-temperature sapphire weighing sensor which can maintain long-term stable work in a high-temperature environment. The high-temperature sapphire weighing sensor is provided with a shell with a cable connector; a niobium-based alloy elastic body with a strain zone surface and an external circuit bard which is connected with the connector are installed in the shell; the center of the strain zones at two side surfaces of the elastic body is provided with a sensitive assembly which is connected with the external circuit board; the sensitive assembly sequentially comprises a sapphire base, a strain resistance layer, a welding layer and a passivation protecting layer from inside to outside; and a high-temperature Ni resistor for compensating sensitivity drift caused by temperature change is welded on the external circuit board. The invention adopts advanced approaches, such as ion beam sputtering process, ion beam etching process, electrostatic sealing process, and the like, ensures that the sensor has excellent long-term stability in the high-temperature environment, has the advantages of tiny temperature zero drift and high comprehensive precision and can precisely measure carried weight.

Description

technical field [0001] The content of the present invention belongs to the technical field of measuring instruments and equipment, and relates to a weighing sensor, especially a sapphire weighing sensor that can maintain long-term stable operation in a high temperature environment. The product is mainly used in metallurgy, chemical industry, casting, aerospace, nuclear power Weighing occasions for high-temperature operations in other industries. Background technique [0002] With the development of modern industrial construction, especially the metallurgical industry of steel mills, there are more and more high-temperature load cell applications. As far as steelmaking plants are concerned, their production targets are high-temperature molten iron and steel. Ladles, ladles, tundishes, rotary ladles, and ladle cars are all containers and means of transportation for factories to store and transport high-temperature molten iron and steel. According to the equipment conditions o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01G3/14G01G21/00G01G3/18
Inventor 盖广洪黎明诚戚龙杨静
Owner SHAANXI ELECTRICAL APPLIANCE RES INST
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