SU543993A1

SU543993A1 - Device for monitoring the reliability of wire resistors

Info

Publication number: SU543993A1
Application number: SU2340762A
Authority: SU
Inventors: Георгий Алексеевич Игнатьев; Юрий Федорович Макеев; Михаил Иванович Костюнин
Original assignee: Предприятие П/Я А-3816
Priority date: 1976-04-02
Filing date: 1976-04-02
Publication date: 1977-01-25

Description

(54) УСТРОЙСТВО ДЛЯ КОНТРОЛЯ НАДЕЖНОСТИ ПРОВОЛОЧНЫХ РЕЗИСТОРОВ(54) DEVICE FOR MONITORING THE RELIABILITY OF WIRE RESISTORS

, Изобретение относитс к области контрол проволочных резисторов и может быть .применено .при контроле резисторов на надежность неразрушающим методом.The invention relates to the field of control of wire resistors and can be applied when monitoring resistors for reliability by a non-destructive method.

Известно устройство, содержащее источ- ник питани , формирователь длительности перегрузочного импульса, мостовую схему, усилитель посто нного тока и самописец .A device is known comprising a power source, an overload pulse width driver, a bridge circuit, a DC amplifier and a recorder.

Однако при использовании этого устрой-, ;ства после окончани процесса контрол требуетс дополнительное врем на определение годного и забракованного резисторов путем .сравнени диаграмм контрол , полученных на самописце, с эталонной диаграммой го/ ного резистора, что уменьшаетпрризводительность и вноситсубъективные ошибки кош .рОЛЯТ:However, when using this device, after completing the monitoring process, additional time is required to determine the suitable and rejected resistors by comparing the control diagrams obtained on the recorder with the reference circuit of the electrical resistor, which reduces the productivity and introduces subjective errors in the CROL:

Кроме того, самописец обладает значительной инерционностью и не реагирует на дефекты резистора, заключающиес в по влении импульсов малой длительности, что уменьшает достоверность контрол . Устройство ДОЛЖНО обеспечивать тщательную балансировку мостовой схемы, так как достигнутре напр жение разбаланса увеличиваетс пропор- In addition, the recorder has significant inertia and does not respond to resistor defects, which consist in the appearance of short duration pulses, which reduces the reliability of the control. The device MUST ensure careful balancing of the bridge circuit, since the unbalance voltage is reached, the proportional

ционально амплитуде приложенного напр жв НИН испытательного перегрузочного импульса , которое составл ет напр жение, соот ветствующее его п тикратной номиальной мощности, причем балансировка i осуществл - етс при напр жении, не вли ющем на параметры контролируемого резистора, которое составл ет примерно ЗО% напр жени его номинальной мбщнсзсти. При невыполйё ии . тщательной балансировки понижаетс стэдень достоверности контрол , так как могут быть отмечены как дефекты резистора, так и nVреходные процессы в схеме. Обеспечение ж« тщательной балансировки мостовой схемы офрицательно сказываетс на производительнЬфти труда.rationally, the amplitude of the applied voltage of the NIN of the test overload pulse, which is the voltage corresponding to its fivefold nominal power, moreover, i is balanced at a voltage that does not affect the parameters of the controlled resistor, which is approximately 30% of the voltage its nominal mbshnststi. In case of failure. careful balancing decreases the confidence level of the control, since both defects of the resistor and nV transient processes in the circuit can be marked. Providing well balancing of the bridge circuit has an adverse effect on the productivity of labor.

Цель изобретени - повышение произвоЧ. дительности и степени достоверности контрол .The purpose of the invention is to increase production. duration and degree of reliability of the control.

Claims

The goal is achieved by the fact that the device for controlling the reliability of wire resistors, containing a series-connected source, a driver for the duration of an overload pulse, a motor circuit, a DC amplifier and a recorder, is equipped with an amplitude selector-pulse, a block of smooth rise of the amplitude of the overload pulse, two time relays and an indicator which is connected through the amplitude pulse selector simultaneously with the bridge circuit and the DC amplifier, and through the first and second relays In time, with the shaper of the overload pulse and with the unit for smoothly raising the amplitude of the overload pulse, the latter being connected to a power source. The drawing shows a block diagram of a device for monitoring the reliability of wire resistors. The device contains a power source 1 shaper of the overload pulse 2, bridge circuit 3, DC amplifier 4, recorder 5, smooth amplification circuit of the overload pulse 6, time relay 7 and 8, amplitude pulse selector 9 and display circuit 10. Shaper 2 outputs the signal to the soft-rise circuit 6 of the amplitude of the overload pulse and the time relay 7 and 8. The power supply 1, controlled by the circuit 6, ensures a smooth increase in the voltage amplitude, which is fed to the pavement through the driver 2 circuit 3. To the output of bridge circuit 3, the amplitude selector of pulses 9 is connected, which records instantaneous changes in the RR characteristics of the resistor (impulses of defects) resulting from the influence of an overload pulse on it. Time relay 8 opens the display 10 after the overload pulse is applied, and, time relay 7, close the indi-capy circuit before the end of the overload pulse. At the output of bridge circuit 3, through a DC amplifier, a recorder 5 is turned on, which records the change in the dynamic resistance of the resistor as a result of an overload pulse. Amplitude pulse selector 9 and display cx 10 are practically inertia-free and allow you to directly register resistor defects, no additional processing of control results is required, subjective errors are eliminated due to inertia, which generally improves performance by the access control condition. The use of circuit 6 for smoothly raising the amplitude of the overload pulse establishes a false pulse of the unbalance of the bridge circuit in ;.-) OTM of supplying the overload pulse, and using the amplitude pulse sector 9, which reacts to impulses of resistor defects, makes it impossible to carefully balance the bridge circuit 3, which also has a positive effect on the increase in productivity and the degree of accuracy of control. The use of two time relays 7 and 8 increases the reliability of the control, eliminating the possibility of transient registries at the beginning and at the end of the effect of an overload pulse. The use of the proposed device for controlling the reliability of wire resistors will significantly improve the performance and reliability of the control. Apparatus of the Invention A device for monitoring the reliability of wire resistors, containing a series-connected power source, a shaper of an overload pulse, a bridge circuit, a DC amplifier, and a recorder, characterized in that it is equipped with an amplitude selector to increase the performance and reliability of the control. pulses. a smooth amplification unit for the overload pulse, two time relays and an indicator connected through the amplitude pulse selector simultaneously with the bridge circuit and the dc amplifier, and through the first and second time relay - with the overload pulse width former and the overload amplitude block pulse, the latter being connected to a power source. Sources of information taken into account in the examination: 1. Seleznev B. B., Ermolenko G. A., The use of non-destructive testing methods, Reviews on electronic equipment, Technologists and production organization, ed. Electronics, at. 32, July 1969, p. 83-84.