SU991279A2

SU991279A2 - Structuro scope

Info

Publication number: SU991279A2
Application number: SU813285230A
Authority: SU
Inventors: Степан Николаевич Килин; Мурад Арифович Карамышев; Владимир Иванович Аликин; Владимир Федорович Новиков
Original assignee: Предприятие П/Я Р-6378
Priority date: 1981-05-14
Filing date: 1981-05-14
Publication date: 1983-01-23

Description

Изобретение относится к неразрушающим методам контроля физико-механических характеристик материала изделий и может быть использовано в областях машиностроения.The invention relates to non-destructive methods for monitoring the physicomechanical characteristics of the material of products and can be used in the fields of engineering.

По основному авт. св. № 794449 известен структуроскоп содержащий-трансформаторный преобразователь, включенный в обратную связь блокинг—генератора, питающего его, селективный усилитель, , подключенный через выпрямитель к входу ключа и второму входу дифференциального усилителя, первый вход которого соединен с обкладкой конденсатора и выходом ключа, а выход — с входами индикатора и порогового блока, выход которого соединен с вторым входом ключа, flj .According to the main author. St. No. 794449, a structure-containing-transformer converter is known, included in the feedback of the blocking — generator supplying it, a selective amplifier, connected through a rectifier to the key input and the second input of the differential amplifier, the first input of which is connected to the capacitor plate and the key output, and the output with the inputs of the indicator and the threshold block, the output of which is connected to the second input of the key, flj.

Недостатком этого структуроскопа является то, что он не обеспечивает еле—· жение за нулевым потенциалом на входе индикатора при отсутствии детали в преобразователе и слежение за ценой деления индикатора.The disadvantage of this structuroscope is that it does not provide a trace of zero potential at the input of the indicator when there is no part in the transducer and it does not track the price of division of the indicator.

Изменение цены деления индикатора в процессе работы устройства, вследствие изменений различных факторов (емкости конденсатора индуктивности датчика, питающего напряжения и т.ц.), при- ходится подстраивать вручную, что снижает производительность контроля.The change in the indicator division price during the operation of the device, due to changes in various factors (capacitance of the sensor inductance capacitor, supply voltage, etc.), has to be adjusted manually, which reduces the monitoring performance.

Целью изобретения является повышение производительности контроля за счет автоматического поддержания постоянной цены делений индикатора, т.е. обеспечение одинакового отклонения стрелки индикатора от эталонного сигнала независимо от исходного состояния схемы устройства.The aim of the invention is to increase the performance of control by automatically maintaining a constant price of the indicator divisions, i.e. ensuring the same deviation of the indicator arrow from the reference signal, regardless of the initial state of the device circuit.

Цель достигается тем, что структуроскоп, содержащий соединенные последовательно блокинг—генератор с включенным в его обратной связи трансформаторным преобразователем, селективный усилитель, подключенные к селективному усилителю последовательно соединенные выпрямитель, ключ и дифференциальный усилитель, кон— индикатора, входу усилителя схема структурой5The goal is achieved by the fact that a structuroscope containing a blocking-generator connected in series with a transformer converter included in its feedback, a selective amplifier, a rectifier, a key and a differential amplifier connected to a selective amplifier, a key and a differential amplifier, an indicator, an amplifier input circuit structure5

991279 4 равно нулю. Причем это состояние сохраняется при всех медленных изменениях напряжения на выходе выпрямителя 4,991279 4 is zero. Moreover, this state persists with all slow changes in the voltage at the output of the rectifier 4,

т.е. происходит слежение за нулем индикатора 8 в исходном состоянии. При резком изменении напряжения на выходе выпрямителя 4, что происходит при установке детали в катушку преобразователя 1, рост напряжения на первом входе дифференциального усилителя 6 отстает от роста напряжения на его втором входе из-за конденсатора 7, включенного параллельно первому входу. В результате этого на выходе дифференциального усилителя ;6 появляется сигнал, который заставляет сработать пороговый блок 9 и на его , выходе появляется сигнал, который закрывает ключ 5, и таким образом на инци-. катор 8 подается сигнал, · пропорциональный твердости контролируемой детали.those. there is a tracking of the zero indicator 8 in the initial state. With a sharp change in the voltage at the output of the rectifier 4, which occurs when the part is installed in the coil of the converter 1, the voltage increase at the first input of the differential amplifier 6 lags behind the voltage increase at its second input due to the capacitor 7 connected in parallel with the first input. As a result of this, a signal appears on the output of the differential amplifier; 6, which forces the threshold unit 9 to work, and a signal appears on its output, which closes the key 5, and thus, on-off. Cator 8 gives a signal proportional to the hardness of the part being monitored.

Для того, чтобы избежать погрешности измерения, вызванной тем, что цена делений индикатора меняется из-за изменения исходного состояния измерительной схемы устройства, вызванного целым рядом причин, например изменением емкостей конденсаторов, индуктивности датчика, изменением питающего напряжения в процессе длительной работы устройства, другая клемма индикатора 8 подключена на выход усилителя 11 рассог— ’ ласования. Это позволяет, в зависимости от исходного состояния измерительной схемы устройства и задатчика 12 цены делений индикатора, устанавливать нужную цену делений индикатора и поддерживать ее автоматически при любых медленных изменениях исходного состояния устройства. Таким образом, описанное устройство позволяет повысить точность и производительность контроля физико-механических характеристик изделий из материалов.In order to avoid measurement error caused by the fact that the indicator divisions change due to a change in the initial state of the device’s measuring circuit caused by a number of reasons, for example, changes in capacitors, inductors of the sensors, changes in the supply voltage during continuous operation of the device, another terminal indicator 8 is connected to the output of the amplifier 11 rassog— 'lassovaniya. This allows, depending on the initial state of the measuring circuit of the device and the setter 12 the price of the indicator divisions, to set the desired price of the indicator divisions and maintain it automatically for any slow changes in the initial state of the device. Thus, the described device can improve the accuracy and performance control of the physico-mechanical characteristics of products made of materials.

Claims

The invention relates to non-destructive methods for monitoring the physicomechanical characteristics of the material of products and can be used in the field of engineering. According to the main author. St. No. 794449 is known a structuroscope containing -transformer converter, included in an inverse communication block-I-generator, supplying it, a selective amplifier connected to the key input and the second differential amplifier input, the first input of which is connected to the capacitor plate and the key output the output is with the inputs of the I-Gaikator and the threshold block, the output of which is connected to the second key input, flj. The disadvantage of this struchturoscope is that it does not provide for a zero potential on the inside of the indicator in the absence of a part in the converter and tracking the price of the indicator's division. The change in the price of dividing the indicator during operation of the device, due to changes in various factors (capacitance of the capacitor inductance of the sensor, supply voltage, etc.), has to be adjusted manually, which reduces the control performance. The aim of the invention is to increase the productivity of control by automatically maintaining a constant price of indicator divisions, i.e. ensuring the same deviation of the indicator indicator from the reference signal regardless of the initial state of the device circuit. The goal is achieved by the fact that a structural amplifier containing a blocking generator connected in series with a transformer converter connected in its feedback is a selective amplifier connected in series to a selective amplifier in series with a defroster, a key and a differential amplifier, a multiplexer through which the input of a differential amplifier is connected. connected to a common bus, and a threshold unit, connected by a differential amplifier output and a key input, and the second input of a differential amplifier It yield vshr DC converter, and an indicator is provided between the output of the key and the indicator are connected in series and a source follower amplifier mismatching, and price setting unit dividing indicator connected to the second input of error amplifier. In the drawing, a diagram of the structures of the osprey is shown ... The Structuroscope contains a transformer converter 1, which is connected in feedback to a blocking generator 2, a selective amplifier 3 connected by an input to the secondary winding converter, and an output through rectifier 4 to the input of a key 5 and the second input of the differential amplifier 6, the first input of which is connected to the lining of the hub 7, and the output to the input of the indicator 8 and the input of the threshold unit 9 connected to the second input of the key 5, the source follower 10, connected to the output of Switch 5, the input of the differential amplifier and the capacitor plate, and the source follower output is connected to the first input of the error amplifier 11, the second input of which is connected to the output of the indicator split price indicator 12, and the output of the error amplifier 11 is connected to the second terminal of the indicator. The device operates as follows. The product is installed in the coil of the transformer converter 1 and at its output a signal appears, which is fed to the input of selective amplifier 5, tuned to one of the higher harmonics of this signal. The selected and; harmonic amplified by the selective amplifier 3 through the rectifier 4 is fed to the first input of the key 5 and the second input of the differential amplifier 6, and since in the initial state the key 5 is open through it and to the first input of the differential amplifier 6, the capacitor plate 7 and the input of the source-follower 10, In the initial state (there are no parts in the coil of the converter 1), the voltage amplifier 6 at both inputs of the inverter 1 is equal. Since the key 5 is open at its output and at the inputs of the indicator 8 and the threshold block 9, the voltage is zero. Moreover, this state is maintained at all slow changes in voltage at the output of the rectifier 4,; those. the zero of indicator 8 is tracked in the initial state. With a sharp change in voltage at the output of the rectifier 4, which occurs when the component is installed in the coil of the converter 1, the voltage rise at the first input of the differential amplifier 6 lags behind the voltage rise at its second input due to the capacitor 7 connected in parallel with the first input . As a result, at the output of the differential amplifier; 6, a signal appears that causes the threshold block 9 to operate and its | the output appears a signal that closes the key 5, and thus on the display. The cathode 8 is given a signal proportional to the hardness of the monitored part. In order to avoid measurement errors caused by the fact that the price of the indicator divisions changes due to a change in the initial state of the measuring circuit of the device, caused by a number of reasons, for example, a change in capacitors, inductance of the sensor, a change in the supply voltage during long-term operation device, the other terminal of the indicator 8 is connected to the output of the error amplifier 11. This allows, depending on the initial state of the measuring circuit of the device and unit 12, the price of the indicator divisions, to set the desired price of the indicator divisions and maintain it automatically in case of any slow changes in the initial state of the device. Thus, the described device allows improving the accuracy and performance of monitoring the physicomechanical characteristics of products made of ferromagnetic materials. Claims of the Invention: Structuroscope St. No. 794449, characterized in that, in order to monitor the control performance, it is equipped with a series-connected repeater and error amplifier connected between the key output and the indicator, and the indicator target price set to the second input of the error amplifier. attention during examination I 1. USSR inventor's certificate No. 794449, cl. Goin 27 / 8O, 198O (prototype).