SU1283559A1 - Device for measuring average indicated pressure of internal combustion engine - Google Patents

Abstract

The invention relates to instrumentation engineering and allows for enhanced functionality, improved accuracy and productivity. A miscellaneous signal from the output of the filter 16 is fed to the inputs of the elements 19 .and 20 of the memory. At the moment of arrival of the signal from the output of the delay unit 11, the negative voltage level is detected at the output of the memory element 19 and, accordingly, the output voltage level of the memory element 20 is positive. The received signals are summed with the adder 22, and the result is fed to the input of the memory element 21. The pulse from the delay element 25 is fed to the input of the memory element 21, the output signal of the latter is recorded by the resulting signal from the output of the adder 22. The signal from the output of the memory element 21 is fed to the input of the comparator 23, to another input of which the source 24 receives the reference signal . The pulses from the output of the comparator 23 are fed to the input of the detector 18. 1 Cp f-ly, 1 ill. (L

Description

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11283559

The invention relates to instrumentation, construction, and in particular to means for diagnostics and control of internal combustion engines.

The purpose of the invention is the expansion of functional capabilities, increasing accuracy and productivity.

The drawing shows the electrical structure of the device. The device contains sensor 1, angular position sensor 2, reference position sensor 3, controlled pulse shaper 4, eversive counter 5, first frequency divide 6, block 7 scaled, and first low filter 8 low register 9.

The output of the first frequency divider 6 is connected to the fourth input of the scaling unit 7 and to the second input of the controlled pulse generator 4, the second control input of which is connected to the input of the reversing counter 5, the first output to the third control of the scaling unit 7, the second and third outputs connected respectively with the summing and subtracting inputs of the reversible counter 5.

The output of pressure sensor 1 is connected to. the input of the scaling unit 7, the output of which is connected through the first low-pass filter 8 to the input of the registration unit 9.

The device also contains the first 10 and second 11 delay blocks, a block of 12 variable resistors, an analog-to-digital converter 13, a frequency multiplier 14, a second frequency divider 15, a second low-pass filter 16, a signal analyzer 17, and a signaling device 18.

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The output of the sensor 3 of the reference position is connected to the first input of the first block 10 delay, the third input of which is connected via frequency multiplier 14 to the output of the sensor 2 angular positions and directly to the second input of the second frequency divider 15, the second input of which is connected via analog-digital a converter 13 with an output of a block of 12 variable resistors, and an output with a first input of a second block of 11 delays and a first input of a second frequency divider 15, the first head of which is connected to the first input of a controlled driver 4 pulses, and the second th exit - with the second

the input of the second delay block 11, the second and third outputs of which are connected respectively to the first and second control inputs of the analyzer 17

signal, and the third output - with the input of the first frequency divider 6 and the installation input of the reversible counter. The output of the scaling unit 7 is connected through the second filter 16 lower

frequency to the input of the signal analyzer 17, the output of which is connected to the input of the detector 18.

The signal analyzer 17 comprises first 19, second 20 and third 21 memory elements, a signal adder 22, a comparator 23, a reference signal source 24 and a delay element 25. The outputs of the elements 19 and 20 are connected respectively to the first and second inputs of the adder 22, the output of which through the element 21 is connected to the first input of the comparator 23. The second input of the last is connected to the output of the source 24. The output of the element 25 is connected to the second, input of the memory element 21. The first inputs of the first and second memory elements are connected to the output of the second low-pass filter, and their outputs to the first and second

the inputs of the adder, while their second inputs are connected respectively to the second and third outputs of the second delay unit.

The sensor 2 forms at its exit beyond the revolution of the crankshaft a series of pulses uniformly following each other through the angle if c 360 / i, where i is the number of pulses in the series. Sensor 2 can be performed

for example, in the form of an induction rotator and metal pins evenly spaced around the circumference of the flywheel.

Sensor 3 generates one pulse

per revolution of the crankshaft at the moment, the predicted moment leading to a certain angle Lfg when the piston reaches the supporting cylinder, for example, the top dead center (lmt). Value (f

is chosen from the condition of ensuring the possibility of combining the moment of occurrence of the pulse of the sensor 3 when it is delayed in the angle of rotation of the shaft with the moment it reaches the actual

Q.M.T. and should exceed the maximum I but possible advance of the moment of the actual mt relative settlement, arising due to inaccuracy of the sensor installation, clearances of the crank mechanism and changes in the latter during operation. Sensor 3 can be made, for example, in the form of an induction rotation marker connected to its output by a pulse former and a special pin mounted on the circumference of the flywheel, or a special hole in the flywheel.

The controlled driver 4 analyzes the counter code 5 and the change in the signal at the output of the divider 6 and generates pulses at the first output, the front and section of which correspond to the moments of change of the sign of the harmonic components of the piston stroke function reproduced in block 7, as well as packs of pulses in the second and third the outputs associated with the inputs of the counter 5, with a pulse frequency equal to or half the frequency of the pulses coming from the first output of block 15. Shaper 4 can be built on the basis of a controlled frequency divider, output cat cerned is connected to a distributor controlled pulse code analyzer.

At the moment when the code of the first address appears, the analyzer changes the signal level at the first output of the imaging unit 4. At the same time, the initial level of this signal is set on the front and edge of the pulse arriving at the first input

. "1Rove. The division ratio of the controllable divider, equal to two or one, is set respectively by the front and slice of the same pulse.

Block 7 scales the signal of sensor 1 by multiplying the current value of this signal by the value of the piston stroke function corresponding to a given angular position.

M (p) sine Y sin 2 (f,

where ty is the angular position of the shaft;

9 - the ratio of the radius of the crank

to the length of the connecting rod,

1 The first filter 8 has a relatively large time constant, sufficient to suppress ripples with a frequency equal to the frequency of engine i cycles, and can be executed on the basis of several stages of low-pass active filters.

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The second filter 16 is characterized by a relatively small time constant, sufficient to suppress ripples with a frequency equal to sampling frequency 5 by the piston stroke function scaling device, and can be built on the basis of a single cascade of active low-pass filter.

Block 9 can be made in the form of an integrating digital voltmeter.

The first delay block 10 is the exact delay level of the sensor 3 pulse at angle N kif (where N is the code entering the third input 5 of the block 10, LD; is the angle of rotation of the shaft corresponding to the period of the pulses arriving at the second input of the block 10) . Block 10 can be performed on the basis of a subtracting counter 0 for the purpose of presetting the code.

The second delay block 11 contains three series-connected coarse delays of the pulse 3 of the sensor, the outputs of which form the first, second to third outputs of the block 11, respectively. The first input of the first stage forms the second input of the block 11. The second inputs of all the steps of the delays are combined and form the first input block 11, and the third inputs of the steps of the delays are received, respectively, the codes of numbers N,, N2 and N.

The construction of the delay stages of unit 11 is similar to that of unit 10, i.e. The first, second and third stages delay the input pulses by an angle of cf, N, ac, respectively. ,

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4) 3 N3 CH ,. (iSrt is the angle of rotation of the shaft corresponding to the period of the pulses arriving at the first input of block 11 and, respectively, at the second inputs of the steps of delays) The number N is calculated for the controlled cylinder 5, the numbers Nj and N are constant.

Let qip be the calculated shift between the IDTs. controllable and supporting cylinders, N is the integer part of the ratios q, / jsr.

Then the number N, Np - 1, the delay of the first stage tp, Cfr - L (p, where O g N.-Aq., N2 2, N3 (180 / du. „) - - 1, and the delay of the second and third stages, respectively equal to Cfj

 2 Ч и т and Q ° 180 ° - QH g t: ooT- responsible pulses at the first output of block 1.1 appear to be delayed with respect to the appearance of a pulse at the first, entrance of this block at an angle.

, tfr - crc fr ,, + isq r and

, + 180

Block 12 contains a set of variable resistors, the number of which is equal, for example, to the number of controlled cylinders of the engine being serviced. Resistors are included in the potentiometric circuit, with their midpoints connected to the switch inputs. When the switch channel, corresponding to the controlled cylinder number, is turned on, the output of block 12 receives a voltage signal, the level of which is determined by the angle of rotation of the slider of the resistor, whose midpoint is connected to the selected channel: the switch.

The multiplier 14 generates the number of pulses equal to the multiplication factor K over the period of the input pulses. As the multiplier 14, a pulse-number multiplier can be used, based on the reference frequency generator, the reference frequency divider with the division factor equal to the multiplication factor K, and control frequency divider.

The second frequency divider 15 generates at its first and second outputs pulses with a frequency lower than the frequency of the input signal, respectively, N, and Nj an integer number of times. Nf and N-2 values. are selected on the basis of the condition of the multiplicity of output frequencies relative to the pulse frequency arriving at the second input of block 15. In this case, the value of N is also chosen on the basis of obtaining the required accuracy of approximation of harmonic components of the piston stroke, and the value Nj determines the discreteness of setting the delay coarse steps of block 11. I.1.1 pulse, which arrives at the first input of block 15, resets its counting nodes to the initial zero state and thereby determines the initial phase of oscillation of the code pulses. Block 15 can be built on the basis of counters with an arbitrary conversion factor.

The indicator 18 can be built on the basis of two display elements, for example, on LEDs, one of which is connected to the input of the indicator through an inverting cascade that ensures a constant illumination of one of the LEDs on arrival

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e, to the input of the signaling device of one of the signal levels and the alternation of the glow of the LEDs when the levels of this signal alternate.

5 The memory element 19 is an analog signal sampling and storage device.

Elements 20 and 21 are similar in design to element 19. 0 The adder 22 is implemented on the non-inverting scheme of the adder of two signals.

Comparator 23 is an analog voltage comparator. Source 24 is a 5 multivibrator-oscillator with a symmetric output signal, a duty cycle of two, and a frequency oscillation in the order of a few hertz. A 20 divider is connected to the output of the multivibrator, which is used to establish the required signal level.

The delay element 25 generates a pulse, delayed relative to the input for a constant time interval, sufficient to establish a signal at the output of the adder 22. Element 25 can be made in the form of two series-connected waiting multivibrators.

 Element 25 is triggered when a start pulse arrives at its input, if a control signal of the appropriate level is applied to the control input of the first standby multivibrator. 35 The principle of operation of the device is as follows.

The equation for measuring the mean indicator pressure can be represented as

R

R; -g P (q)) sin CfdiCf IT

+ I V ((f) I sin2q cf

During one cycle of operation of the engine, the device scaled the current values of the SRI of the pressure function P (qi) by multiplying these values by the corresponding sin values (p, the first harmonic component of the piston stroke function, and integrating these

J5 results. During another cycle of operation, the scaling is performed by multiplying the current values of the function P (h) by the corresponding values of sin 2 C) - the second harmonic

7

the component of the pore stroke function and the value of the coefficient A constant for the engine type and subsequent integration with the result obtained by the first cycle. Thus, the determination of the P-value has effected two engine cycles.

Integration and summation of wasp scaling

Using a slow adder — a low-pass filter with a relatively large time constant, which provides for the suppression of the ripple of the output signal of a scaling device with a frequency equal to the frequency of the cycles. The result of the measurement is true if the start signal of the cycle, formed by the device and determining the beginning of the reproduction of the harmonic component of the piston stroke function, coincides with the bottom dead center (n.m.t.) of the piston of the cylinder under control. This signal is generated by adjusting the phase shift of the sensor 3 signal when the fuel supply to the controlled cylinder is turned off. The phase shift is set by two discrete steps of the pulse delays of sensor 3 — a coarse shift value of which is set to the calculated shift between in m.t. . reference and NMT controlled cylinders with an accuracy of one discrete delay and is not adjustable, and accurate, the value of which is adjustable. The adjustment range of the exact stage is two

Sensor 1 is installed in the indian channel of the controlled cylinder. When the engine is running, the instantaneous value of the gas pressure in the controlled cylinder is transformed

units of discreteness of coarse mortar-40 with sensor 1 in proportional

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a cylindrical cylinder, in accordance with the law of change of the sign of the harmonic components of the piston stroke function. The greatest slope of the change in polarity of the signal corresponds to the reproduction cycle of the first harmonic component of the piston stroke function. At coincidence of the moment of occurrence of the signal of the beginning of the cycle from the moment of reaching mt.t. The piston moment of a change in the sign of the harmonic components coincides with the moment of reaching rm. the piston, and the signal at the output of the fast adder becomes symmetrical about the moment of polarity change. The device captures this moment by analyzing the result of the summation of the signal levels of the fast adder at times up to 1e and lagging about the middle of the reproduction cycle of the first harmonic component by a certain angle uif equal to the unit of discreteness of the delay setting. coarse stage of formation of phase shift. Thus, the control of the results of adjusting the phase shift is performed once every two engine cycles, which speeds up the adjustment process and significantly reduces operator errors due to overshoot.

The device works as follows.

Sensor 1 is installed in the indicator channel of the cylinder to be monitored. When the engine is running, the instantaneous value of the gas pressure in the controlled cylinder is converted by sensor 1 into proportional

It also takes into account possible inaccuracies in the installation of the sensor 3, gaps in the crank mechanism and their change during operation, as well as the non-multiplicity of the value of the total shift to the discrete unit of the coarse stage. Processing the scaling results when adjusting the phase shift is carried out with impulses generated by the sensor 2 with a follow-up period corresponding to the rotation of the shaft through the angle ls, with the help of the fast adder filter 50 blunt to the input of the multiplier t4. At low frequencies, with a small time delay, sufficient to suppress the output ripple signal of the scaling device with a frequency equal to the sampling frequency of the piston stroke function. In this case, the signal at the output of the fast adder changes the polarity in the range of angular positions of the shaft close to the rm. piston cont. electric signal. This signal enters block 7 where it is scaled. Signal with. the output of block 7 through filters 8 and 16 is fed to the inputs of block 9 and analyzer 17, respectively.

The impulses generated by the sensor 2 with a follow-up period corresponding to the rotation of the shaft through the angle ls are pestled to the input of the multiplier t4. At the output of the latter, pulses are formed with a follow-up period corresponding to the rotation of the shaft through the angle scc tfy / K. The pulses from the output of multiplication 14 are fed to the third input of the element 10. The value determines. a discrete unit of setting the delay by element 10. At the same time, pulses from the output of multiplier 14 arrive

to the second input of the block 15. On the first and second outputs of the block 15 pulses are formed with periods of following corresponding to the angles of rotation of the shaft

 and UQ iCfT Nj.

The pulses from the first output of the block 15 are fed to the input of the controlled die 4, the values of which determine the unit of discreteness of the harmonic components of the piston stroke function. The pulses from the second output of block 15 are fed to the second input of block 11. At the same time, the value of cc determines the discretization unit for setting the delays of block 11.

Before starting the measurement, the fuel supply to the controlled cylinder is turned off, and the corresponding control signals are supplied to the control inputs of the blocks 12 and 11.

In this case, the output of block 12 from the midpoint of the variable resistor, corresponding to the number of the cylinder under control, receives a signal

tension up. The level of this signal is determined by the angle of rotation of the slider of the variable resistor. The voltage is converted by the converter 13 into the code of the number N-p, which arrives at the second input of the element 10 and determines the value of the delay of this element equal to the rotation of the shaft through an angle

tPr ht-t

The control input of block 11 is supplied with the code of the number K, J which is a calculation for the cylinder under control and determines the delay of the first stage of the block 11 sr, tf - ti (J /. Responsibly, the values of the delays of the instants of the pulses on the first and second the outputs of block 1.1 take the values tp ,, q + uCfr i tpj. + 180 °. - ... ....

Let the crankshaft be formed at the output of the sensor 3, leading by the angle from the rotation of the shaft to the moment of reaching mt, the piston of the supporting cylinder. This impulse arrives at the first input of element 10, the last one is triggered and forms in the code the impulse deduced relative to the input at an angle cf. The pulse from the output of element 10 is fed to the first input of block 15 and resets its counting elements to the initial zero state, thereby setting the initial phase of oscillation of the output pulses of block 15. At the same time, the same pulse goes to the first input of block 11. The last

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at the second and third outputs, the pulses are triggered and form, respectively, leading and lagging impulses with respect to the middle of the cycle

AC g first exit - the signal to start the cycle.

The start signal of the cycle, formed at the first output of block 11, is fed to the input of divider 6 and the installation input of counter 5, which determines the beginning of reproduction of the harmonic components of the piston stroke function in block 7. Divider 6 divides into two frequencies the pulses of the beginning of cycle signal. The duty cycle of the pulses is two. In this case, during the formation of a pulse at the output of the divider 6, in block 7, the first harmonic component (sinff) is reproduced, and during the formation of a pause, the second harmonic component (sin 2 (f)).

The signals of advance and delay relative to the middle of the cycle, formed on the first and second outputs of block 11, go to the first and second control inputs of the analyzer 17, respectively; the third control of the input of which receives a signal from the output of the first divider 6 frequency The analyzer 17 fixes signals of advance and lag, respectively, negative and positive levels of the signal formed at the output of the filter 16, sum 5 mirovat these levels, fixes the result of summation in the presence of a pulse on output of divider 6 and generates logical signals, O or a sequence of pulses, if the result of the summation is respectively greater, less than or equal to zero. The signaling device 18 generates the signals Advance, Delay or Inphase, respectively. At the same time, the signal of Advance and Delay means that the zero phase of the reproduction of the first harmonic component of the piston stroke function in block 7, respectively, is ahead of and delayed relative to the actual moment of reaching rm. piston controlled cylinder. By rotating the variable resistor slider, the operator, when receiving a signal, advances the delay value 0 of element 10 and, accordingly, decreases this value when receiving a delay signal, until the signal is received. At 0

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The latter does not mean that the moment of the beginning of the cycle at the first output of the block 11 coincides with the moment of reaching mt.t. the piston of the cylinder under control, and the moments of occurrence of the advance and delay signals at the second and third outputs of block 11, respectively, are ahead and lagging by one and the same angle relative to the moment of reaching rm. controlled cylinder. This completes the process of adjusting the phase shift, the fuel supply to the controlled cylinder

The measurement is turned on, and the measurement is performed; the reverse occurs in d - the average indicator pressure. ke.

The measurement is carried out as follows.

The scaling coefficients in block 7 are changed discretely by the angle of rotation and rotation of the shaft. The value of each of the coefficients corresponds to the value of the sine of the angle of rotation selected in the section of the angle between the moments of change

20

After the return of the counter 5 to the initial state, the process of scaling to the end of the pulse at the output of the divider 6 is repeated once more in a similar way. Therefore, during the first work cycle, equal to the pulse duration at the output of divider 6, in block 7, the scaling factor. The multiplication of the instantaneous values of the coefficients lies in the range of the function of pressure by the modulus of the corresponding angle 0-90. The scaling coefficients in block 7 are changed according to the signals from the sensor output 5.30

When a signal appears at the third output of the block 11, the start of the counting cycle is -. Chick 5 is installed in the original cocTOHHiie. By a signal at its output, corresponding to the initial state, 35 of the counter 5 from the generator 4 transverse 3, the block 7 begins the multiplication, the pulses are received by the frequency, the current values of the signal of the sensor 1 to the first (lowest) coefficient stored in the ROM of the block 7. At the same time, the signal of the initial state of the counter 5 is fed to the second control input of the imaging unit 4, in the resulting values of the sine function of the crankshaft angle.

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from the moment of termination of the pulse at the second input of the imaging device 4 to the moment of the appearance of the next pulse, i.e. during the second work cycle, to the inputs of the summation and subtraction

equal to the frequency of the pulses at the first output of the block 15, i.e. frequency twice the frequency of the pulses in

40 previous cycle. As a result, the multiplication process in block 7 is repeated four times during the second duty cycle, i.e. the instantaneous values of the function are multiplied; the second OUTPUT of the latter is unblocked, associated with the summing input of the counter 5.

The second control input of the imager receives a signal from the output of divider 6, which divides into two frequencies the signal of the beginning of the cycle with a duty cycle of two pulses.

Let at the moment of the appearance at the output of block 11 of the next signal of the beginning of the cycle, which sets the counter 5 to the initial state, the impulse starts to be generated at the output of the divider 6. This impulse arrives at the control input formate

l 4 and provides passage to the summing input of the counter 5 pulses with a frequency two times smaller than the frequency of the pulses at the first output of the block 15.

The signal of the final state of the counter 5, which corresponds to the inclusion of the last (highest) coefficient in block 7, blocks the third output and opens the fourth output of the driver 4.

As a result, counter 5 starts to work in subtraction mode, and the inclusion of scale factors is 20

the instantaneous values of the pressure function are multiplied by the modulus of the corresponding

counter 5 from the former 4, impulses of a frequency

values of the sine function of the crankshaft angle.

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from the moment of termination of the pulse at the second input of the imaging device 4 to the moment of the appearance of the next pulse, i.e. during the second work cycle, to the inputs of the summation and subtraction

counter 5 from the former 4, impulses of a frequency

equal to the frequency of the pulses at the first output of the block 15, i.e. frequency twice the frequency of the pulses in

the previous cycle. As a result, the multiplication process in block 7 is repeated four times during the second duty cycle, i.e. the instantaneous values of the pressure function are multiplied by the modulus of the corresponding values of the sine function of the double angle with an accuracy of a constant multiplier / 2, the setpoint signal of which is fed to the corresponding input of block 7.

Simultaneously with the multiplication processes described above, in block 7, the polarity of the multiplication results is changed at the moments of a logical signal change at its fourth

the entrance. The value of this signal, coming from the first output of the driver A, corresponds to the sign of the sine function values reproduced in block 7, and changes at the moments of changing the counting direction of the counter 5 from reverse to forward.

The initial setup of the signal on the first code of the imaging unit 4, corresponding to negative sine values, is performed on the front or edge of the pulse at the second input. The two polar scaled signal is fed to the output of block 7.

The signal from the output of the block 7 is fed to the input of the filter 8, with the help of which the selection is made constant. input signal integration. The constant voltage from the output of the filter 8 is fed to the input of the block 9, in which the value of the average indator pressure is recorded using a DC voltage meter.

The analyzer 17 operates as follows.

A multipolar signal from the output of the filter 16 is fed to the first inputs of the memory elements 19 and 20. At the moment when the signal from the second output of block 11 arrives at the second input of element 19, a negative voltage level is detected at the output of the latter. Accordingly, at the moment the signal from the third output of block 11 arrives at the second input of element 20, a positive voltage level is detected at the output of the latter. The signals from the outputs of the elements 19 and 20 are summed by the adder 22, and the resulting signal is fed to the input of the element 21. The signal from the second output of the block 11 simultaneously arrives at the second. input element 25. The latter is triggered if a pulse arrives at its first input from the output of divider 6, and generates a pulse delayed for a fixed time interval sufficient to establish the output signal of the adder 22. The pulse from the output of element 25 goes to the control input of element 21, and at the output of the latter the resultant signal is recorded coming from the output of the adder 22. The signal from the output of the element 21 is fed to the first input of the comparator 23, to another input of which from the output of the source 24 receives a reference signal - bipolar voltage with a frequency of the order of units of hertz and a duty cycle equal to two. The amplitude of the dipole signal exceeds the threshold of sensitivity of the comparator 23, but is in the zone

units of discreteness of the indicator of the block 9. If the signal level at the first input of the comparator 23 is close to zero, then its output generates pulses with a frequency and a duty cycle equal to the frequency and duty cycle of the source 24. The pulses from the output of the comparator 23 arrive at the input of the indicator 18 and cause alternation the luminescence of both of its display elements, perceived by the operator as the presence of a signal, Phase phase. An excess of the signal at the first input of the comparator 23 of the signal of the source 24 causes, respectively, the output of the signal of the comparator with a level of 1 or O, which in turn causes the signaling element 18 to illuminate the signal indication element Advance or the signal indication element Late.

After the adjustment of the phase shift has been completed, the detector 18 may be turned off.

Claims (2)

1. A device for measuring the average indicator pressure of an internal combustion engine comprising a pressure sensor, an angle sensor, a reference position sensor, a control pulse generator, a reversible counter, a first frequency divider, a series-connected scaling unit with four inputs, a first low-pass filter, and a registration unit, wherein the pressure sensor is p-connected to the input of the scaling unit, which differs in that, in order to diminish its functionality, its accuracy and output performance, entered the first and second delay blocks, variable resistor block analog-diffraction converter, frequency multiplier, second frequency divider, second low-pass filter, signal analyzer with four inputs and a signaling device, while the reference position sensor is connected to the first input of the first block delays, to the second input of which the series-connected variable resistor unit and the analog-to-digital converter are connected, to the third - the series-connected angular position sensor and smart visitor 15 frequency, and the output to the first input of the second delay unit and the first input of the second frequency divider, the output of which is connected to the second input of the second delay unit, and the second output to the first input of the controlled pulse conditioner, the first output of the second delay unit the counter and the input of the first frequency divider, and its second and third outputs, respectively, with the first and second inputs of the signal analyzer, the output of the first frequency divider is connected to the second input of the controlled pulse driver, The Fourth input of scaling and to the third input of the signal analyzer, the scaling unit output is connected via a second low-pass filter to a fourth input of the signal analyzer, the output of which is connected to the alerter. 2. The device according to claim 1, which is based on the fact that it contains 28355916 the signal lizor contains first, second and third memory elements, a signal adder, a delay element, a reference signal source and a comparator; the first inputs of the first and second memory elements are connected to the output of the second low-pass filter, and their outputs are connected to the first and the second inputs summara, 10 whose output is connected via a serially connected third memory element and a comparator with the input of the detector, and the second input of the third memory element is connected to  5 output of the delay element, the first input of which is connected to the output of the first frequency divider, the second input - with the second output of the second delay unit, with this source 20 of the reference signal is connected to the comparator, and the second input of the first memory element is connected to the second output of the second delay unit, the second output of which is connected to the second 25 input of the second memory element.