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What are the main advantages of physical measurement systems

Date: 2020-01-08
Time: 192

The Physical Property Measurement System is a comprehensive system for measuring DC magnetization strength and AC magnetization, DC resistance, AC transport properties, specific heat and heat transfer, and torque magnetization of materials in the context of low temperatures and strong magnetic fields. The following is a description of the main advantages that this highly rated physical property measurement system presents when in use:

What are the main advantages of physical measurement systems

1. Using AC magnetization rate, signal noise can be reduced


The AC magnetization measurement principle of the Physical Measurement System is based on the principle that an AC excitation signal is fed into an AC drive coil and a servomotor drives the sample sequentially to the centers of two probe coils wound in opposite directions, while the time-dependent sample signal is collected. The measured signals of the sample at the centers of the two probe coils are subtracted to eliminate random interactions between the drive and probe coils. By sampling and averaging multiple measurements, signal noise during the measurement process can be reduced.


2. Advantages of system options for precise temperature control


The specific heat measurement option in the physical property measurement system combines the adiabatic method and the relaxation method. During the measurement process, the physical property measurement system is in a high vacuum state, and the top of the sample has a heat-shielding screen. The entire sample platform is at a very similar temperature. In this way, heat dissipation by convection and radiation is strictly limited. In combination with a real-time data acquisition system, this enables precise monitoring of heat flow density and temperature and time. The optional Physical Property Measurement System is equipped with two dedicated thermometers and a heating device for precise temperature control. In this way, the specific heat of the sample can be obtained through the combination of experimental curves and mathematical models.


3. Adoption of DSP to improve signal-to-noise ratio and reduce process conversion


Physical measurement system does not use the traditional single-phase phase-locking technology to process the signal, but the use of high-speed digital signal processor (DSP), so that it not only improves the signal-to-noise ratio, accelerate the speed of measurement, but also no longer need to be converted between the real part of the signal and the imaginary part of the signal, to give play to the technological advantages of the physical properties of the measurement system.


A complete physical measurement system is composed of a base system and a variety of options in two parts, the measurement options and a variety of very convenient samples designed for a variety of measurements, options replacement device, the bottom of the sample chamber to provide plug-and-play wiring, which greatly facilitates the replacement of a variety of options, with its own characteristics.

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