A Supercooling Temperature Monitoring Method Based on Shape Memory Alloy

Abstract

The invention discloses a super-cooled temperature monitoring method based on a shape memory alloy. The method comprises the following steps: 1) taking a shape memory alloy, of which the weight is 10-20 mg and which is in arbitrary shape, as a super-cooled temperature monitoring material; 2) attaching the super-cooled temperature monitoring material directly onto the surface of a monitored product or an internal or external fit position of a package box and then, carrying out super-cooled temperature monitoring; 3) after the monitoring is finished, carrying out analysis on the super-cooled temperature monitoring material through a thermal analysis instrument, and comparing the monitoring result with an original measurement result to obtain information about whether the monitored product is lower than the minimum temperature in the monitoring process and specific temperature exceeding information; and 4) carrying out heating processing on the super-cooled temperature monitoring material until reaching a temperature higher than the austenite transformation finish temperature, so that recycle use of the super-cooled temperature monitoring material can be realized. The super-cooled temperature monitoring method does not need external power supply and can keep history temperature information for a long time.

Description

Technical field [0001] The invention relates to a temperature monitoring method, in particular to a supercooling temperature monitoring method based on a shape memory alloy, and belongs to the field of temperature monitoring and recording. Background technique [0002] As we all know, modern industrial, agricultural or pharmaceutical products need to go through a very complicated process from production, processing, and final sales. Before sales, products usually go through storage and transportation processes. However, some products, for example, Vaccines produced from proteins will fail if they are lower than the specified refrigeration temperature. Similarly, products such as lithium batteries and lubricants usually need to be stored within a specific temperature range. If improper temperature control occurs in any process, the product is most likely to deteriorate or be damaged. Therefore, in the entire supply chain of products, additional temperature indicators need to be u...

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Problems solved by technology

[0003] At present, there are many different types of temperature indicating devices on the market, but most of them are largely restricted by external conditions in use.

For example, the temperature monitoring system based on electronic equipment (patent number: CN201382819) is generally too large in size and high in cost. If there is no external power support, it will stop working immediately

However, the applicant proposed a supercooling temperature monitoring method based on shape memory alloy (patent number: CN102944326A), although the method is simple and has high stability, it can only be used for superheating temperature detection, not supercooling temperature monitoring

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