An over-temperature monitoring device
A monitoring device and over-temperature technology, which is applied to measuring devices, thermometers, measuring heat, etc., can solve the problems of application limitations, difficulty in monitoring, and high cost, and achieve the effect of simple and convenient use process, high reliability, and simple structure
Active Publication Date: 2021-06-01
JIANGSU HECHENG DISPLAY TECH CO LTD
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Problems solved by technology
The advantage of this kind of thermometer is that the reading is intuitive, the production process is simple, and it can be made into various shapes, but the disadvantage is that it can only realize real-time temperature display without irreversible effect and memory effect
[0005] U.S. Patent No. 4,859,360 discloses a temperature monitoring device that can sense temperature and produce irreversible changes. It is realized by irreversible color changes caused by the glass transition temperature of polymerizable cholesteric liquid crystal materials, but the device has color The change effect is not obvious, and it is difficult to monitor with the naked eye. The production process of this type of device is also very complicated, the cost is high, and it cannot be recycled, and its application is also limited
Method used
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Embodiment 1-3
[0041] The liquid crystal compositions of Examples 1-3 were prepared according to the compounds and weight percentages listed in Table 2, and the liquid crystal compositions were used as the liquid crystal layer of the above-mentioned over-temperature monitoring device to prepare a corresponding over-temperature monitoring device.
[0042] Table 2 Liquid crystal composition formulation and its performance parameters
[0043]
[0044] The over-temperature monitoring device prepared in Examples 1-3 is placed in an environment to be monitored, and after a period of time, observe Does the device pattern disappear, such as figure 2 As shown, if the pattern does not disappear, it means that the ambient temperature during the entire monitoring process has never been higher than the clearing point of the liquid crystal (0°C, 8°C, 20°C). image 3 As shown, if the pattern disappears, it means that the ambient temperature during the entire monitoring process has been higher than the...
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Abstract
The invention discloses an over-temperature monitoring device, which comprises a first base layer, a second base layer and a liquid crystal layer sandwiched between the first base layer and the second base layer, the liquid crystal layer is cholesteric or chiral Sexual nematic liquid crystal. The over-temperature monitoring device of the present invention has simple structure, low cost, significant change in temperature sensing effect, irreversible temperature sensing effect, simple and convenient use process, no need for power-on during monitoring process, high reliability, and recyclable use.
Description
technical field [0001] The invention relates to the field of temperature monitoring, in particular to an over-temperature monitoring device with an irreversible temperature sensing effect and recyclable use. Background technique [0002] During the transportation of some special items (such as fresh products, processed food, pharmaceuticals, biological products, etc.), there are strict requirements on the storage environment temperature of the goods, and problems such as deterioration and denaturation will occur if the temperature exceeds a certain temperature, such as the outbreak in Shandong in 2016. The problematic vaccine case is a typical case in which the suspect put the vaccine at room temperature in order to save costs, causing the vaccine to fail. A simple, effective and low-cost temperature monitoring device. [0003] At present, the temperature monitoring is mainly realized by using a thermometer that can record the temperature at regular intervals. After the tra...
Claims
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IPC IPC(8): G01K11/165G02F1/13G02F1/137
CPCG02F1/132G02F1/13718G01K11/165
Inventor 杨亚非丁文全
Owner JIANGSU HECHENG DISPLAY TECH CO LTD