SU769460A1 - Device for automatic measuring the content of ferromagnetic material - Google Patents

Description

SRI signal. The law; Iemene | And the coefficient of the transmission. Is selected so that the signal pre-amplified at the output of the correction unit depends only on the magnitude of the magnetic permeability. Then, the signal 5 is amplified, detected, converted into pulses, the frequency of which is n: transc | IO, the total content of the mag- netic component, iH Integrates. The addition time is set by the lpraMM rel; e time. The register of the measured vel (which is carried out continuously, visually and discretely from: output to the information output unit.

To determine the quantity of the passage - 15. Of the sensor through the magnetic permeability of the material under investigation, the pre-amplified signal from this sensor is fed through a converter that allows: to receive a pulse signal with a frequency proportional to the amount of the magnetic material to the adder, (A compilation of a time relay is generated for a period of time. A time relay is sent. The signal from the sensor of the length of the transducer is transferred to the secondary tape. It is fed to the second OUT of the adder. The measured value is recorded continuously. d1ISK1retN0.

The disadvantage of this installation consists in the fact that at a low filling height of 30 and the material carried out the signal from the sensor of the sensor passes through it very strongly for this height, and it is very difficult to choose the transmission coefficient of the signal correction unit. It is even more difficult to realize 35 this change in the coefficient of transfer in the correction unit with the required accuracy, which causes a decrease in the accuracy of determining the content of ferro 0. magnetized material of the early spring of the small transport tape 40 and makes it impossible to use devices for determining content in extremely irregular loading. .and with a small load of potak .45

For the purpose of innovation and accuracy of measurement, a device for automatic control of the content of ferromagnetic material, containing a primary measuring, transforming magnetic permeability cover, a 50 measuring unit and a recording bar, optional bibs, equipped with gate actuators and sensitive the elements of volume, weight and filling level, electrically-55 Chesk And connected to each other, as well as a measuring transducer and Changing the flux of magnetic induction, 1B connected in parallel with the primary the transmitter (60 provitsae- magnetic bridge.

On the top of the merchandise there is a bl0k-schematic of the device.

The device. Has dispensers 1 with ispolnitelnymi (locking mechanisms 2, connected 65

with sensitive - elements of weight 3, volume 4. and level. filling 5, primary measuring transducers. magnetic, pro.EICAE and 6 magnetic induction 7, located under the metering device 1MI And connected to the remote measuring unit, in which the generator 8 is contained for supplying the measuring magnetic permeability converter 6, two measuring bridges (9i and PS) The corresponding arms of which include primary measuring converters of magnetic / ity permeability of 6 or. Magnetic. 7, connected by successive circuits: resonant amplifier lOi (Yu), detector // i (// 2) ic o input of the corresponding converter "analog - code / 2; () and the Integrator / Ji integrator (iS mounted on the control panel in conjunction with information output units 14 and timer 15.

The device works in the following way. Test material enters the dispenser. The filling level is monitored by the sensitive element of the filling level 5, according to which the signal, after filling the dispenser with the material under investigation, reaches the second dispenser to a certain level. The material is weighed in the dispenser and its volume is determined, after which the shutter of the dispenser is automatically opened, and the output of the material under investigation is released. As a sensitive element of volume 4 and converter “analog - code U2 | can be used counter the number of exits, since the volume of the material under study (In the dispenser

will be great constant. ;

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The produced material passes through the primary measuring transducers of magnetic permeability 6 and magnetic induction 7, the output signal of which is proportional to the content of 1 magnetite iron in the material under study. In order to increase the accuracy of magnetic flux measurements, the PI and 9 bridges are used for cementation or induction, the corresponding arms in which are the primary transducers and 7.

Obtained in the MOSTA diagonal, balanced by N / I and the material under study, the signal is fed to the amplifier WY (resonant amplifier), and then to the detector // i (- // 2). The resulting voltage with an amplitude proportional to the change in permeability or induction, weight and volume is converted by an analogue converter - code 12 (12z, 12z; into pulses whose frequency of a trace is proportional to a1M1Pluent of incoming constant voltage .

These pulses are added by the integrator AND are recorded in analog and discrete form on the tapes of the information output blocks 14. On the tape of the digitizing block ("shown in the drawing), they are also recorded at the end of the output: rhenium. set by timer 15, weight and volume. The transition from the readings of the device to the content of the ferromagnetic material is broken by correlation dependencies. In order to increase the accuracy of determining the content of the ferromagnetic component, multiple correlation has been used.

The presence of metering devices allows you to completely eliminate the effect of 1ner, the visibility of the flow loading, stating the representativeness of the test, and in the complex using multiple correlation to improve the accuracy of the test and the content of ferromagite components in the corresponding stream, operative control; To imitate the technological process, to reduce iron losses during its enrichment.

Claims (2)

1. Author's certificate of the USSR Ho 354382, G 01 V 3/00, 1972. 2. USSR author's certificate No. 428316, G 81 JR 33/00, 1973 (prototype).