SU658512A1 - Arrangement for measuring the angle between magnetic field induction vector and given direction - Google Patents

Description

The invention relates to instrumentation and can be used to measure the angle: | between the magnetic induction vector and a given direction in the study of magnetic fields.

Apparatus for investigating magnetic fields are known, comprising a power source, measurement zones and triggers 1.

However, to measure the magnitude of the angle: p, using this device, it is necessary to measure the tangential BG and the normal B components of the magnetic induction vector and, using the equation .p arctgE, calculate the sought value. This leads to the complexity of the process of measuring the angle between the magnetic induction vector and a given direction and introduces the influence of subjective factors on the research results.

Closest to the proposed invention is a device for determining the direction of the magnetic induction vector of the magnetic field of the Earth, containing a power source, a phase shifter, a measuring probe with two Hall sensors and a trigger with separate start 2.

The disadvantage of such a device is the ambiguity of measurement results at values of: (close mon, where n are positive integers. When simultaneously triggering trigger inputs, the trigger state is uncertain and indefinite output pulse duration gp, which can be zero or 2zg /(about .

The purpose of the invention is to improve the measurement accuracy.

Claims (2)

This is achieved by the fact that in a device for measuring the angle between the magnetic induction vector and a predetermined direction, containing a phase shifter, the input of which is connected to the device input, a measuring probe with two Hall sensors connected in series, the first input of the first Hall sensor, and the second input of the Hall sensor is connected to the output of the phase shifter, and a trigger with separate start, additionally, two trigger pulse drivers, the input of the first of which is connected to the input The input of the second trigger pulse generator is connected to the VOL, ohm of the second sensor Xo; Lia, the logic unit and the series-connected integrator and indicator, the integrator input connected to the trigger output with separate start, the first input of the latter the start pulses and the first input of the logic block, the second input of which is connected to the output of the second shaper trigger pulse, and the second trigger input with separate start is connected with the output of the logic block. FIG. 1 is given a block diagram of the proposed device; in fig. 2 - temporary diagrams. We illustrate the operation of the device. The device contains a phase splitter 1. measuring probe 2, the first Hall sensor 3, the second Hall sensor 4, the first driver 5 start pulses, the second driver 6 start pulses, trigger 7 with separate start m, logic block 8, integrator 9, indicator 10. Device works as follows. During the measurement process, the measuring probe 2 is positioned so that the normal to the plane of the sensor 3 is parallel to the direction of reading of the angle. Diagrams U (t) and Ui (1) show electrical oscillations at the input of the device U (t) Usinojt and phase shifter I I (1) Ts5t (w t + C / 2) UiCOS (,) t. The diagram ID (1) shows the electrical oscillations at the output of the sensors 3 and 4 of the Hall and ID (1) K | v | z1n ((,) t + 1p). The graphs Ur, (t and U6 (t)) represent the output voltages of the formers 5 and 6 of the trigger pulses. The trigger pulses appear at the moments of time. At the output of the trigger 7, voltage pulses IJ / (t) of duration ha 1b appear The pulse voltage U / (- t with the help of integrator 9 is converted into constant Uq (t), the value of which is uniquely related to the angle between the magnetic induction vector and the specified direction, is measured with a measuring indicator 10. The presence in the logic unit device allows to eliminate ambiguity Measurement results with simultaneous arrival of start-up pulses from the outputs of the formers 5 and 6. Thus, the proposed device allows to significantly improve the accuracy and eliminate the ambiguity of the results of measuring the angle between the magnetic induction vector and the specified direction. how long the pulses of the output voltage of a trigger are determined by the magnitude of p to 1 depends on the modulus of the vector / V. The invention The device for measuring the angle between the liexTOpoM magnetic induction and the set | Correspondence 1, containing a phaser, whose input is connected to the device input, a measuring probe with two series-connected Hall sensors, the first input of the first Hall sensor is connected to the input of the phase shifter, and the second input of the second Hall sensor is connected to the output of the phase shifter, and trigger with separate m triggering, characterized by those m. that, in order to improve the accuracy of the measurement, two forms of impuser were additionally introduced; one trigger, the input of the first of which is connected to the input of the device, and the input of the second form. the start pulses are connected to the output of the second Hall sensor, the logic unit and the sequentially connected integrator and the indicator, the integrator input is connected to the trigger output with separate start, the first input of the latter is connected to the output of the first start pulse generator and the first input of the logic unit, the second input of which is connected to the output of the second start impeller, and the second input of the trigger with separate start is connected with the output of the logic block. Sources of information taken into account during the examination 1.N. Fevraleva. Magnetic hard materials and permanent magnets. Kiev, “Naukova Dumka, 1969, p. 110. 2. Weiss G. Physics of galvanomagnetic semiconductor devices and their application. M., “Energie, 1975. p. 189.