SU534714A1 - Measuring unit differential magnetometer - Google Patents

Description

one

This invention relates to magnetic measurements using nuclear precession magnetometers. J Magnetometers are known, which contain quantum well transducers, switching devices, and frequency meters 1. These magnetometers | They do not allow to automate measurements.

The measuring unit differential is known (a social magnetometer with a digital output house containing two frequency sensors, a time interval remover connected to the inputs of two elements AND,; a clock frequency generator and an arithmetic unit in the form of n bits, each; | FROM it consists of two one-digit binary decimal counters 2.

This device contains two parallel-to-work frequency converter drives, since the arithmetic unit (it is a device for parallel operations.

. The purpose of the invention is to simplify the circuit. It is achieved by the fact that in each discharge of the measuring unit of the differential magnesium;

A logic block, a trigger and an decoder are entered, the outputs of the counter and the character trigger are connected to the logical block 1 of the next bit, the output of the first counter is connected to the trigger input of the sign, and the output of the second decoder, its output connected to the logic gate a block of this bit, the second and third inputs of which are connected to the outputs of the AND elements, the fourth input of the logical block of each bit to the clock generator, and the outputs of its fco inputs of binary DI counters. I The drawing shows a block diagram of the device.

Claims (2)

The measuring unit contains two partial sensors 1 and 2, a shaper of time interval 3, elements AND 4.5, the OUT of which are connected to the arithmetic one. kiy device 6 with n bits. The first inputs of the elements And are connected to the frequency sensors 1 and 2 of the magnetometer. The second inputs of these elements are connected to the formant of interval 3, and the outputs are connected to the logical unit 7 of the younger (first) bit; “reef7vIer interrogation) of device 6. In each jaapane arithmetic 1x device, the Iogic output; de 6 tygshyh airatorahnyh meters 8.9. Counter 8 is provided with a sign trigger 10. The outputs of counters 8, 9 and (the sign trigger trigger is connected to the inputs (Cogic) of block 7 of the next most significant bit. The output of counter 9 is connected to the input of the decoder zero 11, the output of which is connected to logic block 7 of this, In addition, the logical blocks of all bits are connected to the clock generator 12. The device operates as follows: aom ..; From the magnetically sensitive sensors 1 and 2 through the elements 4,5 and logic unit 7 of the lower order during the interval times produced by shape a. The bodies of the time interval 3, impulses of frequency of rrbsessions are transmitted to the counter 8 and 9. During the time interval, the transfers from the low bit of counters 8 and 9 go to the next high bit through the logic block 7 of the higher range. The interval in the counter 8 is the digital code of the value of field I. And in the counter 9 - the digital COR of the value of the field N. The counts of i chigks are recorded and then the subtraction proceeds. For etogche, the clock-pulses are fed to the input of the log-block of block 7, until the counter 9 is reset. When the state of the counter 9 becomes zero, the decoder zero 11 stops flowing to the counters of clock pulses. At the same time in each discharge of the counter; There remains a digital code of the value dN (H) p - (Hj,), -, where is the digit number. Transfer from the low-order bit to the next-high one is triggered by triggers, the sign When polling the triggers of the sign U, the transfer pulse passes through the logical 7 following bits to the counters 8. In order to transfer from the low-order bit through the entire counter, the number of polling pulses be n -1 (n - the number of digits of the arithmetic unit), 1 In rez / state in the counter 8, Ipao / iocib DN, H - And which is then re4, {i-erased, In the proposed device : Each bit of an arithmetic unit can be performed on a 20 microchip ah Tina logic. If on the same microchip; max build a measuring unit, similar to the prototype, each bit of the arithmetic unit 1 will contain approximately 5O microcircuits. In addition to this, it will require an order of ICs for each bit of the iaa frequency converter - code. Thus, the number of microcircuits used in the measuring unit of a differential magneto-1 ... 1 device is reduced threefold. The proposed device is approximately twice as well-known, approximately one and a half times smaller than the err dimensions and power consumption. In addition, it is easier to set up, claims. The measuring unit is a differential 1 × magnetometer containing two frequency sensors, a time inter-shaft former connected to the inputs of two elements And, a clock generator and an arithmetic unit in the form of n bits, each of which consists of two one-off binary t-taynyh counters, about -rj which is due to the fact that, in order to forgive the scheme, a logical block, a character trigger and a decoder are entered into each bit, and the counters and the trigger trigger of the input subclass are entered The output of the first counter is connected to the input of the trigger sign, and the second to the decoder, its output connected to the input of the logical block of this bit, the second and third inputs of which are connected to the outputs of the And elements, the fourth input The log block of each bit is with the generator of the frequency, and its outputs are from the input of binary decimal counters. Sources of information taken into account in the examination:. 1. Yu. V. Afanasyev et al. Magnetometric converters, instruments, devices fioBKH. ,, Energie, L., 1972, pp. 184-188. 2.Me5siechniK, 197.4, 82, No. 6, pp. 142-148. ,