SU983563A1 - Transmission coefficient tolerance checking device - Google Patents

Description

(54) DEVICE FOR ADMISSION CONTROL OF TRANSMISSION RATIO

The invention relates to a measuring technique and can be used to control the transmission coefficient of analog and pulse devices. A voltage comparison device is known that contains two identical channels & ies, connected in parallel, consisting of serially connected transformers and a rectifying bridge, the voltage summing circuit being connected to the outputs of these channels | radio potential outputs of rectifier bridges are interconnected flT The disadvantage of the device is precision accuracy. The closest to the invention to the technical essence is devices for measuring the relations of two alternating voltages, containing serially connected reference frequency generator, the first and second attenuators, the output of the latter is connected to the first key, the output of which is connected through an amplitude detector to the first input zero of the organ and the second key to the storage capacitor and to the second input of the zero-organ, the output of which is connected to the input of the control unit, the outputs of which are connected respectively to the control inputs The first and second attenuators, the first and third keys, the inputs of the latter are connected to the control object, and the output to the other input of the first key 23.: A disadvantage of the known device is the low accuracy due to the nonlinearity of the wave-current characteristic of the amplitude detector, as well as the dependence of the parameters condenser versus temperature. The aim of the invention is to increase the accuracy of the control. The goal of the postvalue is achieved by introducing a phase deviation, two x atarator, three elements I. and two triggers into the device containing two att & nuators, and the control object is connected to the first inputs of the first and the second elements And to the input of the first attenuator, the output of the control object through the phaser is connected to the input of the second attenuator, the first and second outputs of which are connected. respectively, the first inputs of the first and second comparators, the second inputs of which are connected respectively to the first and second outputs of the first attenuator, while the outputs of the first and second comparators are connected respectively to the second inputs. the first and second And elements, the outputs of which are connected via the corresponding first and second triggers to the inputs of the third And element, the third inputs of the first and second And elements are connected to the source of reference gates, and the other trigger inputs are connected to the signal source of the throw. The drawing shows a block diagram of the device tolerance control gear ratio. The device contains the object 1 control, phase shifter 2, the first 3 and second 4 attenuators, the null organ 5, the first 6 and the second 7 comparators, three elements 8-10, two triggers I 12, the device operates as follows. Before the start of the control, a reset pulse is applied to the triggers And and 12. At the frequency of the control, the phase shifter 2 compensates for the phase shift between the input and output signals of the object 1 of the control. In this case, depending on the magnitude of the transfer coefficient, the device can operate in one of three modes. With tolerance control of the transmission coefficient, the maximum and minimum permissible values of which are greater than one, the following dividend factors 3 and 4 are set: K 1, on the first and second outputs of the attenuator 3, (first output of the attenuator 4, K. on the second output of the attenuator 4, KjjjfH, maximum and minimum allowable transfer ratios of object 1 of control If the transfer coefficient of object 1 of control is in tolerance, i.e. K, -, Qy where the transfer coefficient of object 1 of control, then at the outputs of Comparators 6 and 7 t low potential, which sets at the outputs of the first and second elements And 8 And 9 a low level at the moment of action of a pulse at the output of the null organ 5, after the cessation of which a low level at the outputs of the elements And 8 and 9 remains. In which the triggers 11 and 12 are installed by the reset signal, the output of the third element AND 10 does not change (when the Comparison Strobe button is pressed on the input of the And 8 and 9 elements, a signal of about 2-3 cycles of the input signal frequency is given) level showing that the transmission coefficient is within tolerance. When Kpgp3a leaves the tolerance zone K gp-JK afimi, at the outputs of the first Koi napaTopa 6 or the second comparator 9, a high potential is established, which i, when coinciding with the pulses from the zero-output 5, formed synchronously to the input voltage, passes through zero the output of the corresponding element H 8 or 9 is set to high, and the corresponding trigger 11 or 12 is knocked down and a low level & is set at the input of the third element I 1O indicating the output of the object 1 control coefficient of the control is beyond tolerance. The absence of pulses at the output of the null organ 5 prohibits the passage of false information to the triggers 11 and 12, if the half of the input signal has changed. The control of an object, the transmission coefficient of which K and K are respectively larger and less than one or both of these quantities are less than one, is done in a similar way, but the attenuator setting is measured in this way. Provided, 7l, set the following coefficients nepejCia. .ch attenuators 3 and 4:, K K -, 4. condition K., K. K K K k -1 K -i% wa Chg zhi control of the object by current flow at the output of the null organ 5 there is always a high level and - the change of information at the outputs of the elements And 8 and 9 occurs immediately upon the arrival of the comparison gate. The use of a tolerance ratio control device in accordance with automatic quality control equipment, for example, operational amplifiers or active t C-filters, improves accuracy and quickly, the control action is 2.3 times that

Especially advisable in mass production and control of these and products.

inquiries

Ф о р м

Device tolerance control. of the transfer factor, which contains two attenuators and a null organ, which is to ensure that, in order to improve the control accuracy, a phase shifter, two comparators, three AND elements and two triggers are introduced into it input object con-. The control is connected via a null-organ to the first inputs of the first and second elements 15 I and to the input of the first attenuator, the output of the control object through the phase shifter is connected to the input of the second attenuator,. the first and second outputs of which are connected respectively to the first inputs 20

the first and second comparators, the second inputs of which are connected respectively to the first and second outputs of the first attenuator, while the outputs of the first. and the second comparators are connected COOTW appropriately to the second inputs of the first And second elements, whose outputs are connected via the corresponding nejvvy and second triggers to the inputs of the third And element, the other inputs of both triggers are connected to the source of the reset signal, the third inputs of the first and second And elements are connected to the signal source gates of comparison.

Sources of information taken into account in the examination

1. USSR author's certificate

No. 439764, cl. GO1 I 19/10, I.O4L2

2. USSR author's certificate

No. 586393, cl. (01R 19 / 1O, 02.23.76

Claims (1)

Claim A device for tolerance control of the transmission coefficient, containing two attenuators and a zero-organ, with the exception of the fact that in order to increase the exact * ⁰ type of control, a phase shifter, two comparators, three elements And and two triggers, with the input of the object con-. trol connected via a null-body to the first inputs of the first and second members 15 and the second to the input of the first attenuator, the output of control object through a phase shifter connected to the input of the second attenuator, the first and second outputs which are respectively connected to the first input 20 of the first and second comparators, the second ^- * the inputs of which are connected respectively to the first and second outputs of the first attenuator, while the outputs of the first 5. and the second comparators are connected respectively to the second inputs of the first and second AND elements, the outputs of which are connected through the corresponding first and second triggers to the inputs of the third AND element, the other inputs of both triggers are connected to the reset signal source, the third inputs of the first and second elements AND are connected to the source signal strobe comparison.