Introduction: The integrated test system is also becoming networked. Each instrument is connected via the GPIB bus and VXI bus. Taking the "DSPS" concept proposed by Texas Instruments as an example, the DSP chip is used as the core, and the entire application system solution is provided in cooperation with the enhancement of the predecessor's mixed temperature controller signal circuit, ASIC circuit, components, and development tools.

At present, the development of fieldbus and smart meters in the world presents a situation in which multiple buses and their thermal resistance meters coexist.

A large number of new devices for ultra-large-scale integration (VLSI), surface mount technology (SMT), multilayer circuit board printing, wafer-scale integration (WSI), and multi-chip module (MCM) are used in networked instrumentation. Computer aids such as CAD, CAM, CAPP, CAT, etc., have made new temperature controllers such as multimedia technology, human-computer interaction, helium control, and artificial neural network widely used in modern instrumentation. The sensor and signal processing technology that is listed as one of the 22 major technologies of the United States “has a major impact on national security and prosperity” is mainly based on miniaturization technology.

Miniaturization of a variety of intelligent instrumentation has been gradually introduced to the market, instrumentation is undergoing a profound intellectual change.

Because of the improvement of microelectronics technology, instrumentation products are further integrated with microprocessors and PCs, and the digitization and intelligence of instrumentation have been continuously improved.

One of the key development areas of the temperature controllers in the late 1980s and the late 1980s is considered as a new technology widely used in the 21st century. Micro-devices using MEMS technology are called on-chip instrumentation. MEMS products include automotive accelerometers, pressure, chemistry, flow transmitters, and micro-spectrometers, and are widely used in environmental science, aerospace, biomedical, and automotive industries. Military, industrial control and other fields. Buss such as HART, FF, Profibus, Lonworks, WorldFIP, CAN, etc. have been applied to a certain field and have been extended to other fields.