Summary
The maximum dynamic error in registering the position of the object by means of radiometric relays is attained in a device with a low integrator time constant.
However, a low integrator time constant leads to statistical errors of measurement which can only be decreased by raising the activity of the emitter. In the cases when it is possible to displace the measuring device with respect to the reference plane it is better to use a relay with a large integrator time constant; naturally, the statistical error of measurement is then decreased.
The above analysis can be used for computing the dynamic accuracy and devices for a continuous measurement of levels.
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Literature cited
L. I. Shiff and R. D. Evans, Rev. Sci. Instr.7, No. 12 (1936).
A. G. Vasil'ev and K. S. Klempner, Automatika i Telemekhanika20, 3 (1959).
A. G. Vasil'ev, I. S. Zhitomirskii, and K. S. Klempner, Automatika i Telemekhanika21, 1 (1960).
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Klempner, K.S., Vasil'ev, A.G. Dynamic error in registering the position of an object by means of radiometric relays. Meas Tech 3, 1061–1064 (1961). https://doi.org/10.1007/BF00988358
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DOI: https://doi.org/10.1007/BF00988358