SU1698857A1 - Digital magnetic flux density meter - Google Patents

Abstract

The invention relates to magnetic measurements, in particular to high-precision constant magnetic induction meters. The purpose of the invention is improved measurement accuracy. In a digital magnetic induction meter, based on the use of Hall's effect and push-pull operation to eliminate the additive error of the Hall sensor and containing the Hall sensor 1, switch 2, power supply 3, synchronous detector 4, pgeo-5 voltage 5 - number and number, counter 6 , binary decimal decoder 7, digital reading device 8, triggers 12 and 13, circuits AND 10 and 11, decoder 14, indicator 15 characters, control block 9, variable resistor 16, switch 17, circuit OR 18 trigger 19 are entered . Increased accuracy measured and is achieved by reducing the insensitive gi zone, caused by the voltage of the non-ecchipotentiality of the Hall, by periodically calibrating the instrument in the process of operation in the Ktrgl mode. Calibration is performed by varying the resistance value of the variable resistor connected between the current and potential electrodes of the Hall sensor. 3 il. WITH

Description

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Claims (1)

A digital magnetic induction meter containing a series-connected Hall sensor, a switch, a synchronous detector, a voltage - number of pulses converter, a counter, a binary decimal decoder and a digital readout device, two triggers, two AND elements, a decoder and a sign indicator, the sign output of the voltage converter number pulses connected to the first inputs of the first and second elements, the output of the first element And is connected to a single input of the first trigger, the output of the second element And is connected to the course of the second trigger, the output of which is connected to? the first input of the decoder, its second input connected to the output of the first trigger And, hera, the first output of the decoder is connected to the first zero installation input of the counter, the second and third outputs of the decoder are connected respectively to the first and second inputs of the sign indicator, characterized in that, in order to improve the accuracy of measurement, a control unit is inserted into it, element OR, a third trigger, a switch and a variable resistor connected between the current and potential electrodes of the Hall sensor, the first output of the control unit 15 is connected to the control input of the switch, the second output of the control unit is connected to Odom trigger inverter voltage - pulse number, the third output of block uprav2Q Lenia coupled to a second zero-adjusting input of the counter, the fourth output - to a second input of the first element ¹ and the fifth output - to the second input of the second AND gate, the sixth output 25 with zero inputs of the first and the second trigger, the seventh output - with the third input of the decoder, the eighth output with the first input of the OR element, the second input of which is connected to the output of the third trigger, the single and zero inputs of which are connected via a switch to a common bus, the output of the OR element is connected to the second input of the binary decimal decoder. 22F-P —-______: —L 23 ¢ -PI _____ · _.πτ ~ ... ΠΞΞ ______ NOT— ΠΤ ~ 24 / L -______ — _____________________ Π ________ 25 & Π ------ β -----—-------- 0 ----- 26 / ---- JE 27¼ --- 28.29 / —-- Figure 2