Digital temperature sensor chip is an integrated circuit that can measure the ambient temperature and convert it into digital signal output. In the field of heat meters, digital temperature sensor chips are widely used to measure and monitor the temperature changes during the transmission and use of heat energy.
The working principle of digital temperature sensor chip is based on the thermoelectric effect or the temperature sensitive characteristics of semiconductor materials. They usually consist of a temperature sensor and a signal processor. The temperature sensor can be a thermistor, thermocouple or thermistor, and it will change its resistance or voltage according to the change of ambient temperature. The signal processor is responsible for EPM7128ATC100-7 The analog signal output by the sensor is converted into digital signal and output to the external system for processing and display through the interface.
Heat meter is a kind of equipment used to measure and record heat energy consumption. It is usually used to monitor the use of heat energy in buildings, factories and other places. The application of digital temperature sensor chips in heat meters mainly includes the following aspects:
1. Temperature measurement and monitoring: The digital temperature sensor chip can accurately measure the ambient temperature and convert the measurement results into digital signals for output. The heat meter can read the output signal of the sensor chip to monitor and record the temperature change in the heat transmission process in real time, so as to provide accurate heat use data.
2. Temperature compensation: digital temperature sensor chip can be used together with other sensors (such as flow sensor) for temperature compensation. When measuring the heat consumption of a heat meter, it is necessary to consider the influence of temperature on fluid properties. By using the digital temperature sensor chip, the temperature of the fluid can be measured in real time, and the thermal energy measurement results can be corrected according to the temperature change, so as to improve the accuracy of the measurement.
3. Data storage and communication: The digital temperature sensor chip usually has a built-in memory and communication interface, which can store the temperature data inside the chip or transmit it to the external system through the interface. The heat meter can use these functions to store the temperature data in the chip, and transmit the data to the upper computer or cloud platform through the communication interface to achieve remote monitoring and data management.
4. Fault diagnosis and alarm: digital temperature sensor chip can be used together with other sensors (such as pressure sensor) for fault diagnosis and alarm. The heat meter can judge whether there is any fault or abnormality in the heat transmission process by monitoring the changes of temperature, pressure and other parameters, and give an alarm in time for maintenance and adjustment.
The digital temperature sensor chip - T117 is a digital analog mixed signal temperature sensor chip, with a high temperature measurement accuracy of ± 0.1 ℃, and users do not need to calibrate. The temperature sensing principle of temperature chip is based on the characteristic relationship between the PN node temperature and the band gap voltage of CMOS semiconductor. After small signal amplification, analog-to-digital conversion, digital calibration and compensation, the digital bus output has the advantages of high precision, good consistency, fast temperature measurement, low power consumption, flexible programmable configuration, long life and so on.
Built in chip 16-bit ADC， Resolution 0.004 ° C, with an ultra wide operating range from - 103 ° C to+153 ° C. The chip is 100% tested and calibrated before leaving the factory. The calibration coefficient is fitted according to the temperature error characteristics, and the compensation calculation is automatically performed inside the chip. The chip supports digital I2C communication interface, temperature measurement data memory access, function configuration, etc. can be realized through digital protocol instructions. The I2C interface is suitable for high-speed board level application scenarios, and the higher interface speed can reach 2MHz.
Built in non-volatile E2PROM The storage unit is used to save chip ID number, high and low temperature alarm threshold, temperature calibration correction value and user-defined information, such as sensor node number, location information, etc. The chip also has ALERT alarm indication pins, which is convenient for users to expand hardware alarm applications.
In a word, the application of digital temperature sensor chips in the field of heat meters can improve the accuracy and reliability of heat measurement, realize remote monitoring and data management, provide fault diagnosis and alarm functions, and provide effective monitoring and control means for the transmission and use of heat energy.
