SU711587A1 - Functional angle-of-rotation converter - Google Patents

Description

one

The invention relates to analogue encoding techniques, to methods for monitoring the working processes of piston machines & s and can be used in devices that measure, for example, indicator pressure,

A device is known in which the value of L (the ratio of the crank radius to the length of the connecting rod} is established in a simple way — by turning the knob of potentiometer 11. However, this device is cumbersome and low accuracy, since it is made in the form of two synchronous generators that are rigidly interconnected with each other and engine number 4, the output of which is directly dependent on the frequency of rotation of the crankshaft.

The closest technical solution is a device for angular indication of an engine 2 shaft. This device contains a crankshaft angle sensor consisting of a slotted disk fixed on the engine shaft, light sources and a photoelectric converter, two integrators, two comparators and a logic adder, and generates electrical command signals for the angle of rotation of the shaft, which control the operation of the engine.

However, such a device is not sufficiently reliable, complex in design and has a low accuracy of operation, since it does not allow to generate the function / (H), BINDING piston displacement from the top dead center with the angle of rotation of the engine crankshaft, taking into account the full face. ,

The purpose of the invention is to improve the accuracy of work, increase reliability and simplify the device.

five

This is achieved by the fact that a known device containing a summed-up amplifier, whose output is the output of a converter, and series-connected rotation angle sensor and pulse shaper, has been introduced two rectangular voltage converters into a sinusoidal, variable mass lag resistor, a constant-scale resistor and a frequency converter by two, with the output of the pulse former connected to the input of the first rectangular-to-sinus voltage converter and to the input of the frequency divider, the course of which is connected to the input of the second converter of direct-ground voltage to sinusoidal, c. the first rectangular to sinusoidal voltage converter is connected to the first stationary output of the variable scale resistor, the second stationary and movable terminals of which are connected to the non-inverting input of the summing amplifier, the output of the second converter. the rectangular voltage to the sine wave is connected to the non-inverting input of the summing amplifier via a constant-scale resistor

The drawing shows the structural scheme of the proposed functional converter.

The functional transducer contains a rotation angle sensor 1, a pulse shaper 2, split 3 frequencies per two, rectangular voltage transducers 4 and 5 into sinusoidal, alternating b and constant 7 large-scale resistors and an oscillator 1 amplifier 8,

Functional Converter works as follows.

The pulses from the angle sensor 1 are fed to the input of the imaging unit 2 pulses, which activates the pulses of a certain duration at the output. The pulses from the output of the formaker 2 pulses are fed to the input of the frequency divider by two and to the input of the transducer 4. The rectangular pulses from the divider 3 frequencies are fed to the input of the second transducer 5 of a rectangular voltage into a sinusoidal, which also forms a sinusoidal signal, however its frequency two times less than the first. These two sinusoidal voltages are fed to the input of summing amplifier 8, where they are summed at a certain scale, which is set by resistors 6 and 7, and the scale of the sinusoidal voltage from the output of converter 4 is changed by using a variable resistor 6.

Thus, the transduction signal of the summation amplifier 8, and hence of the functional angle converter, will reproduce the function X MF). The value of L can be set using a variable resistor 6.

The proposed angle transducer favorably differs from similar devices, including the prototype, in that it allows you to simulate the function, 1) (H)

with y-1et of size D, which increases the accuracy of the converter. Moreover, this is achieved in a rather simple manner — by rotating the knob of the potentiometer, which performs the role of a large-scale resistor, and the converter circuit itself is distinguished by simplicity and, therefore, reliability in operation. The proposed technical solution of the functional converter allows its use on any

engine brands without a change in the circuit / whereupon D is taken into account by the position of the potentiometer knob, which can be calibrated in advance in terms of A,

Claims (1)

Invention Formula A functional angle converter, comprising a summing amplifier whose input is the output of a converter, and a series of angle of rotation and pulse generator connected in series, characterized in that, in order to improve operation accuracy, increase reliability and simplify the device, the functional converter contains two rectangular converters voltage in sinusoidal, variable scale. a resistor, a constant scale resistor and a frequency divider by two; the output of the pulse former is connected to the input of the first rectangular-to-sinusoidal voltage converter and to the input of a frequency divider whose output is connected to the input of the second direct-to-sinusoidal vertical voltage converter; the rectangular voltage is sinusoidal connected to the first fixed pin of the variable scale resistor, the second fixed and movable pin of which is connected to it to the inverting input cc of the downstream amplifier, the output of the second rectangular to sinusoidal voltage converter is connected to the noninverting input of the summing amplifier via a constant resistor. Information sources,. taken into account in the examination 1 „USSR Author's Certificate No. 197235, cl. G 01 U 23/14, 1967. 2, Japan Patent No. 38658/72, cl. 51 E 65, published. 1972 (prototype).