Electromagnetic Super-high Frequency Methods of Measurement

A number of physical limitations of resistive transducers' informational capabilities caused the search of new measurement means using electromagnetic fields of high and superhigh range of frequency to transfer information of non-electric values. 

The major features of superhigh-frequency multiparameter measurement transducers (SMIP) are the following:

—— wavelength range of supply voltage is commensurate with transducer dimensions;

—— information source is presented by the reactive component of transducer input impedance;

—— the possibility of variation of the electromagnetic field relative to the object of study depending on the problem to solve;

—— commensurability of geometrical dimensions (or, frequently equality) of distributed SMIP and the object of study.

超高頻電磁測量法

由于電阻傳感器測取信息的能力受到很多物理限制，致使人們?nèi)で笮碌臏y量手段，例如利用高頻和超高頻電磁場傳輸非電量的信息。

超高頻多參量測量傳感器（SMIP）的主要特點如下：

——供電電壓的波長范圍與傳感器的大小相稱或相當(dāng)；

——信息源由傳感器輸入阻抗的無功部分表示；

——電磁場可根據(jù)所要解決的問題相對于被研究物體進行改變；

——分布式SMIP與被研究物體的幾何尺寸相稱或常常相等。

Distributed SMIP enable the researcher to obtain information on the field distribution of a physical value along the object without continuous increasing the number of discrete transducers in informational systems.

At our institute SMIP are developed for analysing local strain fields, temperature and pressure fields. Constructively, for measuring these physical values SMIP in form of a strip or a wire with a cross-section less·than a few square millimeters are stuck to the surface along the profile of interest.

分布式SMIP可使研究人員在無需不斷增加信息系統(tǒng)中離散傳感器數(shù)量的情況下，獲得關(guān)于某一物理量沿物體的場分布信息。

我院研制了分析局部應(yīng)力場、溫度場和壓力場的SMIP。從結(jié)構(gòu)上說，測量這些物理量的SMIP采用狹長帶或線狀形式，其橫截面積小于幾平方毫米，粘貼在感興趣的外廓表面上。

Electrical signal at the output of secondary devices is proportional to the level of the measured physical value, and the additional parameter of the signal, e.g. lag time allows to identify the measured physical value at each point of the object along SMIP. SMIP may be also applied to solve such problems of aerodynamic experiment as the measurement of friction force as well as forces and moments.

二次儀表輸出端的電信號同待測物理量的大小成正比，而電信號的附加參數(shù)，例如時間滯后量，則使我們能夠辨別物體上沿SMIP系統(tǒng)每一點上的待測物理量值。SMIP也可用來解決像磨擦力測量以及力和力矩測量等等氣動實驗問題。