SU881804A2 - Displacement-to-code converter - Google Patents

Description

The invention relates to automation and computing, According to the main author. St. No. 680012 is known a transducer displacement code, containing a P-shaped magnetic core with teeth on one of the rods on which the reading windings are placed, on the middle rod is an excitation winding, a movable element located between the rods of the magnetic circuit, detectors and comparison elements, and the read windings in each section, the divisions are divided into two groups; in each group, the readout windings are connected in series and connected to the input of elements of comparison 1 through detectors. When the ferromagnetic shunt is above the boundary between the teeth, there is a risk of collision ambiguity, which reduces the reliability of the measurement. In this transducer, the discreteness is equal to the tooth division pitch, which limits the accuracy of movement traversal. The aim of the invention is to improve the accuracy of the conversion while detecting read ambiguity. The goal is achieved. We note that the low-end detectors are connected to an adder, which is connected via a voltage divider to additional reference elements connected via an OR element to a memory register, and the main comparison elements are connected to a memory register. FIG. 1 shows a block diagram of a converter; in fig. 2 is a graph of voltages in the elements of the lower bit. The device contains a U-shaped magnetic circuit 1, on which excitation winding 2, movable shunt 3, teeth 4, reading winding groups 5, detectors 6, comparison elements 7, adder 8, voltage divider 9, element OR 10 and memory register 11 are placed. When moving the shunt 3.. There is a redistribution of the magnetic flux through the teeth. This magnetic flux, penetrating the corresponding windings 5, induces an emf in them, which are functions of moving shunt 3. When shunt 3 is on the border between teeth 4, the read ambiguity is eliminated by the fact that a prohibition signal is generated at this moment From the code change in memory register 11, the formation of this signal is explained by the voltage of FIG. 2 Voltages and "and K form a signal and", equivalent to 1 or O depending on their ratio, and, n Is Ui, and, r and and, oo Ui2 and ", simultaneously these signals are sent to the adder 8. For example, and -A + BSinx, and, g "A-fBS I p (x + 7G), then at the output of adder 8 we have. This voltage is necessary to form a reference signal to the elements of comparison 7. and 75. From the divider: voltage 9, part of the voltage llj is removed. In order for the areas where the signal for Preta is present to be equal to the areas of its absence, it is necessary that Uo-ASln O, 71A o, 36U,. t g With this method of forming the reference signal, the changes and,,, U, 2 Uo are compensated, and the boundary of their intersection remains in the same place. The prohibition of the prohibition signal and, 5, and UoVUi2 Uo This signal is used simultaneously and as an output, informational. Its period of displacement is equal to half of the period of cutting teeth t t3 / 2, which halves the conversion resolution, thereby increasing the measurement accuracy. So far, there are code signaling changes on the comparison devices 7,, 7.,, 7; , the memory register 11 is locked at the input and at the output its signal does not change as soon as the prohibition signal disappears, a new code value is written into the memory register 11. The use of devices that form a prohibition signal to change the code at the time of reading ambiguity improves the reliability of measurements with a simultaneous increase in accuracy, which expands the field of practical application of the proposed anaipy-digital motion converter. Claims of the invention Converter-code for auth. St. No. 680012, characterized in that, in order to improve accuracy, low-end detectors are connected to an adder, which is connected via a voltage divider to additional comparison elements connected through an OR element to a memory register, and the main comparison elements are connected to a memory register . Sources of information taken into account in the examination 1. USSR author's certificate № 680012 ,. cl. G 08 C 9/04 ,. 1978

f / c)) etta

/ /

- b

u

well

i / f

{/ f2

L

W

(/ ff

7

 - have

/

(/.

1g

Claims (1)

Claim Transmitter displacement code by author St. No. 680012, characterized in that, in order to improve accuracy, low-order detectors are connected to an adder, which is connected through a voltage divider to additional comparison elements connected via an OR element to the memory register, and the main comparison elements are connected to the memory register.