SU533958A1 - Transducer move code - Google Patents

Description

I

The invention relates to automation and computing devices that convert angular and linear values into digital codes. It can be used in dividing tables, dividing heads, Coordinate measuring machines, comparators and other devices in which the variable value can be represented as an angular or linear movement of the measuring element and in which it is necessary to change the origin of the process.

The known displacement transducer is a code containing reading elements that are grouped into groups whose inputs are connected to the clock outputs of the generator, and the outputs of the like reading elements of each group are combined and connected via the corresponding OR elements to the inputs of the logical block of code conversion, the block of matches and triggers .

A disadvantage of the known converter is the low accuracy and low reliability of the device.

The aim of the invention is I (is to increase the accuracy and reliability of the displacement transducer - code. The goal is achieved by introducing is device "01B to determine the difference of numbers, delay block

Comparison unit, additional OR elements and Switches, one inputs of which are connected to the output of the matching unit, other inputs to the clock (generator outputs, and the same outputs of the switches through the corresponding additional OR elements to one input of the first block for determining the difference of numbers and the comparison unit , the other inputs of which are connected to the outputs of the logical code conversion unit connected through a chain of first and second numbers determining one difference in series to one Valid mu coincidence b.loka delay output unit is connected to one input of the second unit determining a difference of numbers, and inputs the delay unit connected to the output of the comparison unit and to the clock generator output coupled to an input of the logical code block conversion.

The drawing shows the functional diagram of the displacement transducer - code. The converter contains a match block 1, switches 2, 3 and 4 with automatic start and stop, elements OR 5-12, blocks 13, 14 for determining the difference of numbers modulo the base of the number system, delay block 15, comparison block 16, logical code conversion block 17 , a group of reading elements 18, 19 and 20, a multi-cycle oscillator 21 with clock outputs 22, 23 and 24 and synchronizing outputs 25, tires 26 for entering the origin of coordinates and zero-count bus 27 ". The operation of the device is considered by the example of a binary-decimal angle converter — a code in which the reading elements of the angle sensor are functionally divided (as belonging to decimal places) into three groups. Each of the groups of reading elements 20, 19 and 18 has its own interrogation bus, to which the first 22, second 23 and third 24 clock outputs of the generator are connected, respectively. The signals from the indicated generator outputs are in the form of rectangular pulses with a period of T, duration and duty cycle, where m is the number of groups of γ-read elements. The pulses of the neighboring clock outputs are shifted relative to each other by a time equal to ta. The outputs of the reading elements are ay, bi, Ci, and di (where, 2, 3 are for example a decimal place) that perform the same functions. In different groups of reading elements 18, 19, and 20, are connected to the inputs of the same elements OR 9, 10, 11 and 12. For example, the outputs a, a2 and az from the groups of read elements 20, 19 and 18 are connected to the inputs of the element OR 12, the outputs b b bz and b 3 to the inputs of the element OR AND, etc. OR 9-12 are connected to the inputs of a logical block of conversion of codes 17, the clock inputs of which are connected to the clock outputs of the generator. The gating inputs of the switches are connected 1 respectively to the clock outputs of the generator, and the like outputs of the switches, indicated, for example, Xl-., And so on, are combined with the elements OR, 5-8, namely the outputs aj are connected by the scheme OR 8, the outputs bi, Ci, and d / are respectively the elements OR 7, 6, and 5. Switches must perform the following operations. When applying to the idle signals of the signal “Flux” coming from the output of the coincidence unit, the switches should start working in the automatic, periodic switching mode so that at their outputs ui, bi, Ci and di appear sequentially, one after another, the codes of all numbers That (t-ro) bit that a separate switch corresponds to. After the end of the "Start" signal, the switches should remain in the states in which they were immediately before the removal of the "Start CO input / g" signal, and keep this state until the "Start. This signal is conventionally in the form of "1 formed at the output of the match block if the signal is reset to zero and the zero count signal applied to its JJ inputs from the external device and the output of the number difference determination unit 13 ON bus 27, respectively" one. At the output of the differential number determination unit 13, the signal is either "O, if the code outputs of the nodded block are" O, or "1 if the specified code differs from zero. The outputs of the displacement transducer - the code are the OUTPUTS of the device defined by the difference of the numbers 13; the inputs of which are decremented are connected to the block for determining the difference of the numbers 14, and the inputs of the subtracted are connected to the outputs of the elements OR 5-8 and with one of the inputs of the comparison block, the other inputs of which are connected to the outputs of the logical block of code conversion and to the inputs of the decremented block of the definition of the difference of 14. With the output of the comparator information unit arrives at the signal input of the backtrack unit, whose operation is synchronized by signals coming from the clock outputs 25 of the generator. The conversion of the signals of the reading elements of the angle sensor is performed sequentially in groups. Interrogating pulses in the first cycle are fed to the interrogation bus of the first group of reading elements 20 and the gate input gate of the commutator 4, the second one and the interrogation bar and the gate input of the second group of reading elements 19 and switch 3, and the third clock cycle U on the interrogation bar and input gating of the reading elements 18 and the switch 2. The signals of the reading elements 20 at clock ti are fed to the first inputs of the elements OR 9-12. The second and third inputs of these elements OR the signals of the reading elements 19 and 18 arrive in the second and third cycles. Passing through the elements OR 9-12, the signals of the reading elements affect the inputs of the logical conversion unit, which, at each i-th clock t, converts the input signals into the codes of the numbers AI and their outputs. The transfer of information stored in the switches to the inputs of the block for determining the difference of the numbers 13 and the comparison block is carried out through the elements OR 5-8 in a coherent manner. In cycles ii, the codes of the numbers 5i of switch 4 enter the inputs of the indicated elements OR, the cycles of t- and t are the codes of numbers Ba and BZ of switches 3 and 2 corresponding to the comparison block, and the codes of the numbers AI and Bi are compared, with each output The i-th cycle produces a signal Fi, which is equal to "O, if or" 1, if. The delay unit delays all input signals, except those arriving on the last clock, by one clock, i.e., to / and, and transmits the delayed signals to the input of the subtracted number difference determination unit. The input signals of the last (in this case, the third) clock cycle are converted by the IB delay unit 15 using signals from the generator ъ signal "O. AT