SU574599A1

SU574599A1 - Device for measuring thickness of coatings

Info

Publication number: SU574599A1
Application number: SU7602364563A
Authority: SU
Inventors: Николай Николаевич Зацепин; Виктор Фомич Силюк; Иван Иванович Малько; Владимир Викторович Перфильев; Валентин Александрович Калошин; Валерий Михайлович Анискович
Original assignee: Отдел Физики Неразрушающего Контроля Ан Белорусской Сср
Priority date: 1976-05-19
Filing date: 1976-05-19
Publication date: 1977-09-30

Description

1one

Изобретение относитс к контрольно-измерительной технике и может быть использовано дл измерени толщины покрытий.The invention relates to instrumentation technology and can be used to measure coating thickness.

Известно устройство дл измерени толщины диэлектрических покрытий на немагнитных металлах, содержащее генератор, преобразователь , компенсатор, фазовращатели, усилитель, детектор, сумматор, коммутатор и индикатор 1.A device for measuring the thickness of dielectric coatings on non-magnetic metals is known, comprising a generator, a converter, a compensator, phase shifters, an amplifier, a detector, an adder, a switch and an indicator 1.

Недостатком его вл етс низка точность измерени .The disadvantage of it is low measurement accuracy.

Наиболее близким по технической сунщости к изобретению вл етс устройство дл измерени толщины неэлектропроводных покрытий , содержащее дифференциальный преобразователь , источ1ник возбуждени , подключенный к входу преобразовател , и индикатор 2.The closest in technical sense to the invention is a device for measuring the thickness of non-conductive coatings containing a differential transducer, an excitation source connected to the input of the transducer, and indicator 2.

Недостатком его вл етс низка точность измерени и отсутствие цифрового отсчета. Its disadvantage is low measurement accuracy and the lack of a digital readout.

Цель изобретени - повьпленпе точности и автоматизаци контрол .The purpose of the invention is to determine the accuracy and automation of the control.

Дл этого предлагаемое устройство снабжено соединенными последовательно первым детектором, подключенным к первому выходу дифференциального преобразовател , ключом , интегратором, каскадом сравнени , формирователем временных интервалов п цифровым преобразователем, соединенным с индикатором , вторым детектором, вход которого подключен к второ.му выходу дифференциального преобразовател , а выход - к входу каскада сравнени , соединенными последовательно генератором запускающих импульсов п схемой НЕ, подключенной к второму входу ключа, а второй вход формировател соединен с генератором запускающих импульсов .For this, the proposed device is equipped with a first detector connected in series to the first output of the differential converter, a key, an integrator, a comparison cascade, a time interval generator n a digital converter connected to the indicator, a second detector whose input is connected to the second output of the differential converter, and the output is connected to the input of the comparison cascade connected in series by a generator of trigger pulses with a NOT circuit connected to the second input to yucha and the second input of the generator connected to the trigger pulses.

На чертеже представлена блок-схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.

Устройство содержит источник 1 возбуждени , дифференциальный преобразователь 2, подключенный к выходу источника 1. К первому выходу преобразовател 2 подключен детектор 3, соединенный с включенными последовательно между собой ключом 4, интегратором 5, каскадом 6 сравнени , формирователем 7 временных интервалов и цифровым преобразователем 8, выход которого подключен к индикатору 9. К второму выходу дифференциального преобразовател подключен детектор 10, выход которого соединен с каскадом 6 сравненн . Генератор 11 запускающпх импульсов соедпнен с формирователем 7 и схемой 12 НЕ, подключенной к входу ключа 4.The device contains an excitation source 1, a differential converter 2 connected to the output of source 1. A detector 3 is connected to the first output of converter 2, connected to key 4, integrator 5, comparison stage 6, time generator 7, and digital converter 8 connected in series with each other, the output of which is connected to the indicator 9. A detector 10 is connected to the second output of the differential converter, the output of which is connected to a cascade of 6 compared. The generator 11 start-up pulses are connected to the driver 7 and the circuit 12 NOT connected to the input of the key 4.

Устройство работает следующим образом.The device works as follows.

Claims

When measuring a crowd of coatings, the voltage of the source of the excitation source I is applied to the exciting winding of the converter 2, which is connected in opposite directions and located at a distance of x. and x-f-a from the controlled surface object of the signal windings of which the voltages f / i and U-i occur, respectively. The difference on the same} is 1 h and the voltage of the signal winding U and after detection by peak detectors 3, 10 enters the input of the electronic key 4 on the inverter of the comparison stage 6. Using the control signal of the trigger pulse generator 11, the circuit 12 does NOT open the electronic key 4, and the input i-1/2 is applied to the input of the integrator 5. With a sufficiently large gain factor of the UPT and the time interval t, the maximum voltage on the integrator output after the time / shs (), ((U, -, and) dt (U, and,), (I)) –de Scint is expired; that li MO.VK4IT is time t tU., (U, U ,,, we get f / I - f / 2C on the other hand, it is known that X U2 and Ui-Uz ili taking into account formula (3) - -, t. Q. Kt, a --.- with where - const; Thus, the coating thickness.: Connected by a ratio-and time t linear dependence. In the time generator 7, voltage pulses of duration t are generated from the generator 11 pulses and the comparison cascade 6 signals. which are converted into a voltage amplitude in the digital converter 8, the value of which, taking into account the scale / (measured with the indicator 9. Thus, the proposed device allows The aim of the device is to measure the thickness of the coatings, which contains a differential transducer, an excitation source connected to the input of the differential transducer, and an indicator, characterized in that, in order to improve the accuracy and automation control, it is equipped with CompoundiiniHM consistently with the first detector, but the key to the first output of the differential switch, the key, tegrator, comparison cascade, time interval former and digital converter connected to the indicator, second detector whose input is connected to the second output of the differential converter, and output to the comparison cascade input connected in series by a trigger pulse generator and a NOT circuit connected to the second key input , and the second input of the imaging device is connected to the generator of trigger pulses. Sources of information taken into account during the examination 1. USSR author's certificate L 364834, cl. G 01B 7/06, 1971.

2. USSR author's certificate Aib 324477, cl. G01B 7/06, 1971.