SU736151A1 - Displacement-to-code converter - Google Patents

Description

The invention relates to the field of analog-to-digital information conversion, in particular, to displacement transducers in code. Displacement transducers into a code are known that contain a movable coded disk mounted on a shaft and reading elements connected to a code generation unit. In this device, an annular track is additionally applied on the coded disk, on which non-conducting sections prohibiting reading from digital masks , are located symmetrically numeric border. Through the brush of this ring track, a supply voltage is applied to the disk, so that there are no code signals on the number boundary and false codes are not received. In this device, the generation of code signals is received intermittently by prohibiting the removal of information in the areas of number boundaries, as well as and in the fact that if the disk stops at the position on the border of the number, there is no information at all in the dacha 1. The device’s disadvantage is the possibility of obtaining large read errors associated with the lack of output information in the zones changed schityvae "x codes from one value to the next. Lack of information also occurs when the coded disc stops in the indicated zones. The closest to the present invention is a displacement transducer into a code containing a moving element with a binary code mask and a sample sampling track, readable bit elements, reading a reference sampling element, triggers, logic gates AND, grouped in two elements and inverters 2. Disadvantage this device -. low accuracy of the converter. The purpose of the invention is to improve the accuracy of the displacement transducer to the code. The goal is achieved due to the fact that in the converter the output of the reading element of the kgikdogo discharge is connected to the first input of the first logical element AND of the corresponding group and through the inverter to the first input of the second logical element AND of this group, the outputs of the first and second logical elements AND of each group are connected respectively, to the single and zero inputs of the triggers, the second inputs of all logical elements I are connected to the reading element of the sampling rate.

FIG. 1 shows a block diagram of a device by the example of a displacement transducer into a code with sampling of samples; cha figs. 2 shows a common binary code code mask with a sample rate track.

The proposed device is based on the principle of memorizing the value of a read digital code before the arrival of a new value. At the moments of readout of information from the code mask, the information on the last value of the digital code is saved at the output of the converter.

The converter (see Fig.) Contains a movable element 1 with a binary code mask, rigidly mounted on the encoded shaft 2, rotating in the bearing 3. The code mask is made in the form of track 4 of sampling of samples, and providing sample tracks 5 (for simplification only three bits are shown). From each track, the reading is carried out by the corresponding reading element 6 and 7. In addition, in FIG. 1 denotes inverters 8, logic gates AND 9, triggers 10 with separate starts, output digital code 11 of the converter, a signal 12 for setting the triggers to the zero state. This converter registers T-read.

FIG. Figure 2 shows as an example a linear scan of a three-bit mask, usually 1x) of the binary code of the converter with bit tracks 5 and track 4 of the sampling rate. Removal of information from tracks 5 is allowed in unshaded eons of track 4.

The movement of the motion to code converter is performed in the following manner.

Prior to the operation of the pulse 12, the triggers 10 are twisted. At a certain position of the movable element 1, which rotates together with the encoded shaft 2 in the bearing 3, the corresponding digital code is read from the tracks 5 by means of the elements 7. The latter, in the form of electrical signals, is fed in each of the bits to the inputs of a group of two logical elements AND 9, and one of them directly, and an inverter 8 to the eugoy. If, at a given position of the moving element 1, the reading element 6 s

track 4 is in the readable section, the corresponding signal is sent to the other inputs of the AND 9 logic elements and on the trigger 10 a one or other logic element 9 is detected one or zero of the code, respectively, on its single or zero outputs. If a code unit is removed from track 5, which corresponds to the presence of a signal from reading element 7, the signal will appear from the upper AND element and the corresponding trigger 10 will be in one state. When reading from the track 5 zero code, the signal will be at the output of the inverter 8 and by means of the signal from the second (top) element AND 9 the trigger 10 will take the zero state. Similarly, with digital to all the other triggers 10.

Upon further movement of the pivot element 1, when the sensitive element of the track 4 is in the zone of the read prohibition, the signal from the outcome of this element disappears, however, the digital code will be saved at the outputs of the trigger 10. At the next read resolution, a new code is fixed on the trigger, and so on. The device works in the same way with reverse.

The proposed transducer improves the reading accuracy in comparison with the known devices with sampling of samples.

The use is suggested (the converter is especially effective when using coded elements whose masks are made both in linear ordinary form and for any functional dependencies, as well as for table-set values with any sequence of code combinations.

Claims (2)

1. Philippi v.g. Motion Digits, 1965, p. eight. 2. Authors certificate USSR 492903, are. G 08 C 9/04, 1973 (prototype.) 12 eleven