Self-adaptive multi-interface temperature sensor method and system based on single-chip microcomputer

Abstract

The invention discloses a self-adaptive multi-interface temperature sensor method based on a single-chip microcomputer. The method comprises the steps that a single-chip microcomputer interface is connected with a sensor interface; software in the single-chip microcomputer tests the sensor interface and judges the type of the sensor according to a test result; and according to the type of the sensor, carrying out temperature acquisition by adopting a corresponding drive. By arranging the seven-pin interface, one external interface can be compatible with various temperature sensors, the types of the sensors can be automatically identified on software, different acquisition programs are adopted for adaptation, and external interface resources of the temperature collector are saved by using the single interface; and meanwhile, a user can switch the sensor in different scenes without replacing equipment, so that great convenience is brought to use.

Description

technical field [0001] The invention belongs to the technical field of sensor equipment, in particular to a single-chip microcomputer-based adaptive multi-interface temperature sensor method and system. Background technique [0002] Temperature collectors are currently widely used in the market. The scenarios cover many aspects such as medical care, shopping malls, households, transportation, storage, etc. Its main function is to dynamically collect With the function of historical temperature data record storage and data wired or wireless way back for analysis. [0003] In the context of modern development, human life and social activities are closely related to temperature, and it is difficult to find a field that has nothing to do with temperature. Especially in the medical cold chain and commercial cold chain, pharmaceuticals, biological products, fresh food, dairy products, etc. have strict temperature requirements for storage. Cause food and drug deterioration and end...

AI Technical Summary

Problems solved by technology

[0007] Disadvantages: But the measurement temperature range is limited, generally applicable to -55°C ~ 150°C, and the response speed is also slow;

[0011] Disadvantages: low sensitivity, medium precision, slow response, drift at high temperature;

[0015] Disadvantages: The resistance value changes non-linearly with the change of temperature, which is not suitable for wide-range temperature change measurement. The greater the difference from the base temperature, the worse the measurement accuracy. The measurement range is between -40°C and 125°C;

[0017] Therefore, different temperature sensors need to be connected in different usage scenarios, which may cause a temperature collector to be unusable when switching scenarios

[0018] At present, there are two solutions for changing the temperature sensor for switching scenarios. One is to design different devices for different scenarios, and replace both hardware and software, which limits the use of a temperature and humidity collection device; Multiple external interfaces are preset on the device to cope with various sensors. When changing usage scenarios, adjust the software to adapt

However, these solutions will become difficult to implement on some small devices, and adjusting the software will also make the product less usable and applicable.

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