SU789640A1

SU789640A1 - Unit for automatic control of galvanic precipitation process

Info

Publication number: SU789640A1
Application number: SU792749741A
Authority: SU
Inventors: Всеволод Иванович Костюк; Аида Андреевна Краснопрошина; Валерий Платонович Галан
Priority date: 1979-01-23
Filing date: 1979-01-23
Publication date: 1980-12-23

Description

1one

Изобретение относитс к гальванотехнике и может быть использовано дл активного контрол процесса гальванического осаждени .The invention relates to electroplating and can be used to actively control the process of electroplating.

Наиболее близкой по технической сущности к предлагаемой вл етс установка ОЛЯ автоматического контрол процесса гальванического осаждени , содержа та эталонный и измерительный накладные экранные вихретоковые преобраасша- ,р тели, между генераторными и измерительными катушками которых помещены соответственно эталон и элёктроа-свидетель, и сравнивающее устройство.The closest to the technical essence of the present invention is the installation of the OLE automatic control of the galvanic deposition process, containing the reference and measuring overhead screen eddy current transforms, relays, between the generator and measuring coils of which are placed the standard and the electrical witness, respectively, and a comparison device.

Сигналы с измерительных катушек сравниваютс в устройстве сравнени и при их равенстве, т. е. при ра1венстве толщин электрода-свидетел и эталона , на выходе этого устройства по вл ет- JQ с сигнал на окончание процесса К}.The signals from the measuring coils are compared in the comparison device and when they are equal, i.e., when the thickness of the witness electrode and the reference electrode, the output of this device appears - JQ with the signal at the end of the process K}.

Недостатком этой yctaHOBKH вл етс отсутствие при активном контроле толщин гальванопокрытий измерени скоThe disadvantage of this yctaHOBKH is the absence, with active control of the thickness of electroplating, of measuring

рости нанесени покрытий, что затрудн ет контроль качества.coating speeds that make quality control difficult.

Цель изобретени - повышение точности контрол качества покрытий путем активного измерени скорости осаждени .The purpose of the invention is to improve the accuracy of quality control of coatings by actively measuring the deposition rate.

Поставленна цель достигаетс тем, что установка снабжена запоминающим устройством, измерителем приращени сигнала, генератором тактовых импульсов и фильтром, причем к выходу сравнивающего устройства подключены запоминающее устройство и измеритель приращени сигнала, второй вход которого подключен к выходу запоминающего устройства , а третий вход к генератору тактовых импульсов, второй выход которого подключен к устройству задержки, выход которого подключен ко второму входу запоминающего устройства, выход измерител приращени сигнала подключен k фильтру.The goal is achieved in that the installation is equipped with a memory device, a signal increment meter, a clock pulse generator and a filter, and a memory device and a signal increment meter are connected to the output of the comparator device, the second input of which is connected to the memory clock output , the second output of which is connected to the delay device, the output of which is connected to the second input of the memory device, the output of the incrementing meter Igna connected k filter.

Claims

FIG. D. depicts a block diagram of the installation of FIG. time diagram of her work. The installation consists of a reference 1 and 2 measuring overlay screen eddy current transducers, KOTOpbix outputs are connected to a comparison device 3, a 4-clock generator, a delay device 5, a memory 6 and a signal increment meter 7 connected to the output of the comparison device and filter 8, Second The input of the signal increment meter 7 is connected to the output of the memory device 6, and the third to the generator of 4 clock pulses, the second output of which is connected to the device 5 of the delay, the output of which is lyuchey to the second input of the memory device 6, the filter 8 connected to the output of the first meter increments. The signals C of the transducers of the reference 1 and Ur measuring 2, placed in the galvanic bath, enter the comparison device 3, at the output of which a signal appears: s-hr. This total signal is fed to the first input of the memory 6 and to the input 1 of the meter 7 signal increments. At the moment of time, O; A UO / Q -O signal appears at the output of the comparison device) U-UrJ (p which is fed to the first input of the storage device 6, in which the jfo signal is memorized) and the first input of this device is turned off. The signal (0 J (O) 1 appears at the output of the storage device 6. The signal Uj (p also goes to the first input of the signal increment meter 7. This signal is compared with the signal U, which goes to the second input of the signal increment meter 7, and after the first and second inputs of this meter are turned off and the signal appears:% fVfVfH- r ° at the moment of time the first single pulse comes from the generator output 4 clock pulses to input 3 of the signal increment meter 7 and connects its first and second inputs There is a comparison The signals UWA and U (, M) coming from the outputs of the comparison device 3 and the storage device b, the first input of which is disconnected and has its output on it) - After comparing the signals in meter 7, the signal increments 7, its first and second inputs are turned off. Thus, at the output of the meter, a signal appears ((o). When a single pulse appears at the output of the device B of the delay at the moment of time that arrives at the input 2 of the memory 6, the first input of the memory 6 is turned on, to which the signal gee. This signal is stored in device 6, after which the first input of this device is turned off. When the next pulse arrives at the moment of time, the operations are repeated, and so for each increment of the 4th output of the signal increment meter 7, an ll-j signal is formed, which is proportional to the increment (y,) g (n) and (n-1). which is a function of the rate of electroplating. The time interval uiv is chosen so that after the arrival of a single pulse from the time in the meter 7 to the signal increment, the first and second inputs open, the signals ii-i and U are compared (5 and the output by wils, the result of comparing the signal IJ-j and then The proposed device allows simple means to control the rate of deposition of the material on the part, which makes it possible to introduce a correction of the process conditions during the coating process. This leads to a significant improvement in the quality coating, reduces waste, increases labor productivity by automating quality control of products. Formula of installation for automatic control of galvanic deposition process, containing reference and measuring overhead eddy current transducers, between generator and measuring coils of which

respectively, a reference and electro-witness and a comparative device connected to the measuring coils of the reference and measuring transducers are placed, characterized in that, in order to increase the accuracy of monitoring the quality of coatings by actively measuring the speed of the measuring axis, it is equipped with a memory device, a signal increment meter, a clock pulse generator and a filter, the memory device and the signal increment meter being connected to the output of the comparator device, the second and the third input meter signal increments connected to a storage device and a clock pulse generator, a second output of which is connected to the delay device, the output of which is connected to the second input of the memory device, and an output meter increment signal is connected to the filter.

Sources of information taken into account in the examination 1. USSR Author's Certificate N (326254, class C 25V 21/12, 1972.