常用的多频ＥＩＴ系统采用扫频方式‚即每次向被测物体注入单频率激励‚测回

The commonly used multi-frequency EIT system adopts the frequency sweep method, that is, injecting a single frequency excitation into the measured object each time, and then injecting another frequency excitation after measuring the current frequency response. Such an excitation method is not conducive to the situation where the impedance of the measured object changes rapidly, and requires more measurement time. In order to meet the measurement speed requirements of the 3D multi-frequency electrical impedance imaging system, and to effectively apply the EIT technology to the situation where the impedance of the measurement object changes rapidly, it is necessary to realize the design of a mixed frequency constant current source.

The common multi frequency EIT system adopts frequency sweeping mode ‚ That is, single frequency excitation is injected into the measured object every time ‚ After measuring the current frequency response, inject another frequency excitation. This excitation method is not conducive to the situation that the impedance of the measured object changes rapidly ‚ And it needs more measurement time. In order to meet the measurement speed requirements of three-dimensional multi frequency electrical impedance imaging system ‚ The EIT technology is effectively applied to the situation that the impedance of the measured object changes rapidly ‚ It is necessary to realize the design of a mixed frequency constant current source

The common multi-frequency EIT system adopts frequency sweep mode, that is, every time a single frequency excitation is injected into the measured object, the current frequency response is measured and then another frequency excitation is injected. This kind of excitation method is not conducive to the situation that the impedance of the measured object changes rapidly and needs more measurement time. In order to meet the requirements of three-dimensional multi-frequency electrical impedance imaging system for measuring speed and make EIT technology effectively applied to the situation that the impedance of the measured object changes rapidly, it is necessary to realize the design of a mixed frequency constant current source.