SU652540A1 - Arrangement for automatic measuring of phase position of shaft unbalance of exciter of oscillation of vibromachine - Google Patents

Description

652540

The purpose of the present invention is to improve the accuracy and reliability of the device.

This goal is achieved by the fact that a device for measuring the phase position of the unbalance of a vibrator exciter exciter shaft, containing pulse angle sensors of the shaft, pulse moment sensor, start of impact, coincidence circuit and trigger, is equipped with an additional pulse sensor of shaft angular position, delay element, key , a counter, a decoder, and an indicator unit, the first pulse angular position sensor of the shaft being connected to one of the inputs of the first coincidence circuit, an additional The pulse encoder of the shaft angular position is connected to one of the inputs of the second coincidence circuit, the second pulse encoder of the angular position of the shaft is connected to another input of the coincidence circuit, the output of the first coincidence circuit is connected via a serially connected delay element and a key to one of the counter inputs, the output of which is decoder connected to the indicator unit, the output of the second coincidence circuit is connected to another input of the counter and to one of the trigger inputs, the other input of which is connected to the pulse moment sensor la pin mounted on the vibrator housing, and an output connected to the trigger input sootvetstvuk conductive key and the display unit

The device is represented in the drawing and contains: disk 1, pulse sensors 2 and 3 of the angular position of the shaft, additional pulse sensor 4 of the angular position of the shaft, pulse sensor 5 of the moment of impact start, first coincidence circuit 6, second coincidence circuit 7, delay element 8, key 9 , trigger 10, counter 11, decoder 12 and indicator unit 13.

Information about the phase position of the unbalance (crank) is fed to the input of the measuring circuit from the rotating joint with the de-etat or eccentric shaft; an exciter of oscillations of the disk 1, on the outer circumference of which there are placed strictly with a given angular interval Φ (for example, after 5) ferromagnetic protrusions. This disk is a kind of crank angle sensor (force phase sensor). On it, beside the protrusion, defined to (the position of the unbalance axis

(eccentric), installs an additional protrusion at intervals less than. At similar angular intervals, non-contacting (for example, inductive) sensors 2-4 are fixed on the body of the machine, which induce voltage pulses at the moments of passage of the protrusions of the disk. In this case, sensors 2-4 are arranged so that sensor 3 is in the origin position. Such an arrangement of the sensors is caused by the need to provide a measurement of the phase angle with high accuracy and reliability (possible false alarms are eliminated when using only two sensors).

The device works as follows.

When the unbalance axis passes through the origin, i.e. when at the same time, a signal with sensors 2-4 is induced. The incoming signals from sensors 3 and 4 through the coincidence circuit 7 set the control logic element (trigger) 10 and 11-bit counter 11 to their initial position. The counter is set to zero and the trigger is overturned in the tax position in which the key 9 is open and the display unit 13 is closed.

Subsequently, at each turn of the disk at a set angular interval between its protrusions, signals from sensors 2-3 are sent simultaneously to both inlets of the coincidence circuit 6, which forms a counting impulse supplied through delay line 8 and public key 9 to counter input 11 The counting pulses arrive at the counter 11 until the trigger input 10 receives a signal from the impact moment sensor 5, since the trigger 10 is switched to a position where the key 9 is locked and the count stops.

Thus, the crank angle (unbalance) is read from the moment it passes through the reference point until the start of the strike of the impact part. The information about the phase position of the crank (unbalance) and the moment of impact of the working device on the limiter accumulated in the counter 11 is decoded by the decoder 12 from the binary code into the segment code of the indicator unit 13.

In this case, the indicator unit 13 allows to visually determine the phase position of the balance in each shock cycle. 565 of the invention. Measurement device for automatic measurement; the phase position of the unbalance of the shaft of the vibration oscillator exciter containing the pulse sensors of the shaft angular position, the pulse sensor of the moment of the start of the impact, the coincidence circuit and trigger, characterized in that, in order to increase the accuracy and reliability of the device, it is equipped with an additional pulse sensor of the angular position of the shaft, a delay element, a key, a counter, a decoder and an indicator unit, the first pulse angular position sensor of the shaft connected to one of the inputs of the first coincidence circuit, An additional pulse sensor of the angular position of the shaft is connected to one of the inputs of the coincidence circuit, the second pulse 0 sensor of the angular position of the shaft is connected to another input of the coincidence circuit, the output of the first coincidence circuit is connected via serially connected delay element and key to one of the counter inputs, the output of which through the decoder is connected to the indicator unit, the output of the second coincidence circuit is connected to another input of the counter and to one of the trigger inputs, the other input of which is connected to a pulse sensor m inception pin mounted on the vibrator housing and vyhoy trigger connected to the corresponding input key and the display unit. Sources of information taken into account during the examination 1. USSR author's certificate No. 251433, cl. 6 05 V 11/26, 1966. 2. USSR author's certificate No. 189475, cl. 6 05 1E 19/02, 1966.