SU834640A1 - Device for measuring material magnetic parameters - Google Patents

Description

(54) DEVICE FOR MEASURING MAGNETIC PARAMETERS

MATERIALS

The input of stand 1, where the controlled object is installed, and the input of the AVM 2 are connected to the output of the generator 3. The outputs from the stand 1 and the AVM are connected to the inputs of the adder 4. The output from the adder via the signal spectrum analyzer 5 is connected to the input of the comparison unit 6 the input of the digital computer 7, the output connected to the input of the comparison unit 6, and the second output of the digital computer through the executive body 8 - to the inputs of the AVM 2 and the generator A 3. The second output of the comparison unit 6 is connected to the input of the recording device 9. The second output of the generator 3 is connected to the second input regis riruyuschego device 9.

The device works as follows.

The controlled object is installed on stand 1. At the AVM 2, the equation of the object is typed. The object mounted on the bench and the model dialed on the AVM 2 are excited from the generator 3. The object and its model signals are received in antiphase at the adder 4, from where they receive a difference signal, which is fed to the spectrum analyzer 5, from where the harmonics from different values of amplitude (A) and frequency ()). The parameter values of the harmonics (A and I) are supplied to the comparison unit 6, in which they are compared with a predetermined tolerance for the selected harmonics.

According to the results of comparing the received signal with a set of variants of signals, the memory of the digital computer 7 sends command signals from the digital computer 7 through the executive unit 8 to the AVM 2 to establish the corresponding position of the controlled elements of the AVM 2, which provide maximum compensation for the signal from the object and its model, and thus determining the coefficients of the equation representing the model. Then, with the help of the organ 8 connected to the digital computer 7, the generator voltage 3 is formed, stepwise varying, constant, proportional to the frequency of the generator 3, and sawtooth, proportional. Both voltages are fed to the inputs of the registering device 9. According to a certain program, the possibility of fixing the next point on the registering device 9 is established, as well as the transition to the next points of the contour of the area specified in the coordinates of the excitation parameters in which the object being monitored performs the functions of a standard.

The device allows not only determining in real time the values of the coefficients of the equation representing the controlled object, but also the range of adequacy in which the sample performs the functions of a standard. Comparison of this area with the area of deviations of the excitation parameters from the nominal values makes it possible to assess the quality of each given sample. In turn, the superposition of the named areas of a given sample of monitored objects makes it possible to determine the areas of guaranteed reproduction and technological scatter. With the help of these areas, the quality and stability of the technological process are evaluated.

Formula of Invention

Magnetic measuring device

5 parameters of materials containing a generator connected in series, an analog computing machine, an adder, the second input of which is connected to the generator output via a test bench, to the second output of which a two-coordinate is connected

 A recording device, characterized in that, in order to improve measurement accuracy, the series-connected spectrum analyzer connected to the output of the adder are additionally introduced into the device,

5 comparison unit, digital computer and the executive body, the outputs of which are connected to the second input of the analog computing machine, and to the generator input, the second input of the comparison unit is connected to the second output of the digital computer, and the second output to the second input of the recording device.

Sources of information taken into account in the examination 1. USSR author's certificate

5 No. 455306, G 01 R 33/12, 1974.

Claims (1)

Claim A device for measuring the magnetic parameters of materials, containing a series-connected generator, an analog computer, an adder, the second input of which through the stand is connected to the output of the generator, to the second output of which a two-coordinate recording device is connected, characterized in that, in order to increase the accuracy of measurement, the device in addition, series-connected spectrum analyzer, a comparison unit, a digital computer and an executive unit connected to the output of the adder n, the outputs of which are connected to the second input of the analog computer and to the input of the generator, a second input of the comparator is connected to the second output of the digital computer, and the second output - to a second input of the recording device.