Novel temperature and humidity sensor calibration system and calibration method thereof

Abstract

The invention discloses a novel temperature and humidity sensor calibration system and a calibration method thereof. The system comprises a temperature and humidity generator, a temperature and humidity reference dew point instrument, a digital temperature and humidity sensor, a computer 4 and a controller, wherein all the subsystems form a complete full-automatic calibration device, a control driving module of the controller collects temperature and humidity signals of multiple paths of temperature sensors, the temperature and humidity sensors are identified according to addresses, the temperature and humidity signals are transmitted to an interface converter of the computer through a serial bus, and data interaction with the computer is further performed. The system is advantaged in thatcalibration can be completed in a full-automatic mode, high production efficiency and product reliability and high precision are ensured, interference and fluctuation of the external environment to the temperature and humidity environment of an environment cavity of the temperature and humidity generator are small, and the stability of the system is higher.

Description

Technical field [0001] The invention relates to the technical field of automatic temperature and humidity calibration, in particular to a new type of temperature and humidity sensor calibration system and a calibration method thereof. Background technique [0002] At present, the industry's digital temperature and humidity sensors generally use plug-in parallel calibration devices, as attached figure 1 (System diagram of existing temperature and humidity sensor calibration device) and attached figure 2 (Structure diagram of existing temperature and humidity sensor calibration device) as shown. The temperature and humidity sensor plug-in parallel calibration device is mainly composed of the following parts: temperature and humidity generator 01, temperature and humidity reference dew point meter 02, digital temperature and humidity sensor 03, computer 04 and interface conversion module 04-1. [0003] The specific implementation process is as follows: [0004] 1. Insert the temperatu...

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Problems solved by technology

[0010] 1. The temperature and humidity value of the temperature and humidity generator 01 needs to be manually set

[0011] 2. The calibration of the existing digital temperature and humidity sensors is limited by the volume capacity of the temperature and humidity generator 01 due to the use of plug-in calibration devices, so the number of calibrations at one time is not much

[0012] 3. If the calibration of multi-channel temperature and humidity sensor 03 is realized, each sensor must be connected to the computer 04, the system is complex and inefficient

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