Quartz tuning fork resonant temperature and humidity sensor

Abstract

The invention discloses a quartz tuning fork resonant temperature and humidity sensor, which comprises a plastic shell, a humidity sensor and a temperature sensor, wherein the humidity sensor and thetemperature sensor are both located in the plastic shell, the humidity sensor and the temperature sensor are connected with terminals through connecting wires; the terminals are connected with a circuit board; the plastic shell is provided with a ventilation window; the ventilation window is respectively opposite to the temperature sensor and the humidity sensor; and the ventilation window is covered with a layer of ventilation film. According to the invention, the temperature sensor and the humidity sensor are combined, the common measurement of the temperature and the humidity is achieved, the production cost is reduced, and the stability is improved. The quartz crystal is used as the material of a resonator, the tuning fork structure is used as a two-pole structure of the resonator, theerror during measurement is greatly reduced based on the stability of the quartz crystal, the accuracy of data acquisition is improved, and the temperature and humidity sensor can be widely applied to the industries with complex environment and high precision.

Description

technical field [0001] The patent of the present invention mainly relates to the technical field of sensors, in particular to a quartz tuning fork resonant temperature and humidity sensor. Background technique [0002] Sensor technology, communication technology and computer technology are the three pillars of modern information science (technology). The ultra-high-speed development of sensor technology represented by information technology has an important impact on aerospace, petrochemical, resource exploration, transportation and communication, medical electronics, automobile safety, biological research, intelligent systems and daily life. With the development of the measurement and control system, the requirements for the sensing system are getting higher and higher. The temperature sensor is an important thermal quantity sensor and one of the key components of the modern measurement and control system. With the rapid development of information technology and wireless s...

AI Technical Summary

Problems solved by technology

Traditional temperature sensors such as platinum resistors and thermocouples, although the former has good temperature measurement accuracy and stability, but consumes a lot of power, and needs to be connected to the microprocessor through an analog-to-digital converter, which will inevitably lose measurement accuracy; the latter Requires a constant temperature reference source, low sensitivity and high nonlinearity, its application is limited in wireless sensor networks

Although the temperature sensor based on semiconductor technology is compatible with microelectronics technology, its sensitivity is affected by the material processing technology and reflects different sensitivities, which requires continuous calibration and poor interchangeability, and the overall temperature measurement accuracy is not high.

Especially in an ultra-low temperature environment, the sensitivity of traditional temperature sensors and semiconductor temperature sensors will be greatly reduced under the action of a strong magnetic field, or even stop working

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