RU2658138C1 - Method and installation for determining the variability of the gear ratio - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to the field of mechanical engineering, namely, to the testing technique for the investigation and testing of reducers. Method for determining the variability of the ratio of the reduction gear is that it provides the initial values of the speed of the input shaft, the moment of deceleration of the output shaft of the reducer and determine the variability of the gear ratio discretely for the difference in the rotation time of the input and output shafts at the basic angles of their rotation, the basic angle of rotation of the input shaft is i times greater than the basic angle of rotation of the output shaft, where i is the nominal value of the gear ratio. Test facility contains an electric drive and an electric brake. Motion sensors are made of two parts. One part is a cup-shaped bushing mounted on the end of the cantilever part of the shaft, with a flat mirror at the end, fixed at an angle to the centerline, another fixed part is made in the photodetector, illuminator, forming an optical ray along the axial line of the shaft, and a line optical fiber.

EFFECT: technical result is the development of a method and an apparatus for determining the variation in gear ratio.

8 cl, 6 dwg

Description

The invention relates to the field of mechanical engineering, namely to testing equipment for research and testing of gearboxes.

To test the gearboxes, a stand is mounted with a gearbox input shaft drive and an output shaft loader (brake). The stand is equipped with means for measuring individual parameters of the movement of the shafts - speed, torque, etc.

Known layout schemes of stands using a technological gearbox (patent RU 161503 U1 IPC F16H 1/32, G01M 13/02, publ. 04/20/2016; patent RU 74986 U1 IPC F16H 1/32, publ. 20.07.2008). The drive is usually created on the basis of an electric motor, and the load is realized by an electric machine generator (patent RU 2521221 IPC G01M 13/00, publ. 06/27/2014) or due to a functional pair (patent RU 111657 U1 IPC G01M 13/00, publ. 20.12.2011) . To measure the torque used torsion converters (patent RU 2509999 IPC G01M 13/02, publ. 20.11.2013).

Marked stands for testing gearboxes allow you to identify only power parameters - torque, speed, efficiency. There is an extensive class of gearboxes for measuring and control circuits of various devices. For these gearboxes it is necessary to know their metrological properties. The main metrological parameter of the gearbox is the gear ratio within one revolution of the output shaft. The nominal gear ratio is determined by the number of teeth of the constituent wheels and gears. However, manufacturing errors of parts, gaps in kinematic pairs, elastic deformations lead to deviation of the gear ratio from the nominal value.

As a prototype adopted stand for acceptance testing of gearboxes according to patent RU 2029273 C1 IPC G01M 13/02, publ. 02/20/1995. The stand under consideration contains a drive and an electric brake with an excitation winding, kinematically connected to the shafts of the gearbox under test, input and output catch motion sensors, and a device for converting the signals of the shaft motion sensors. Momentometric sensors composed of a primary transducer — a torsion bar, two magnetic conductive disks at its ends with induction secondary transducers, and an adder — were used as motion sensors. A logometer was used as a device for converting sensor signals. The stand with a relatively complete set and wide capabilities does not allow to identify the metrological properties of the gearbox - the inconstancy (variability) of the gear ratio.

The technical result of the proposed solution is to develop a method and installation for determining the variability of the gear ratio of the gearbox.

The tasks are solved:

1. Development and justification of a method for determining the variability of the gear ratio of the gearbox;

2. Development of basic technical solutions for the creation of the installation for determining the variability of the gear ratio of the gearbox;

3. The rationale for technical decisions.

The proposed method for determining the variability of the gear ratio of the gearbox is that it provides the initial values of the input shaft rotation frequency, the braking torque of the gearbox output shaft and determines the gear ratio variability, while the gear ratio variability is determined discretely by the difference in the rotation time of the input and output shafts at their base angles rotation, while the base angle of rotation of the input shaft is i times greater than the base angle of rotation of the output shaft, where i is the nominal value reduction gear ratio.

The method is based on the fundamental relationships between the function and its first time derivative — the relationships between the rotation angle and the rotation frequency.

The transmission gear ratio i expressed in terms of the frequency ω of rotation of the input _Rin and the rotational frequency ω of the output shaft _O

We consider the function (1) discretely. We divide the current values of the angles of rotation of the shafts into equal increments Δ ₁ . We assume that the parameters are detected the same shaft motion sensors, which form a sequence of pulses with a period equal to the rotation shaft at the time increment Δ _1. We get:

- rotation time T _in the input shaft ₁ to the increment Δ

- turn time T _{out of the} output shaft in increments Δ ₁

We denote the base angle of rotation of the input shaft by Δ _in , and the output shaft by Δ _out . Will accept

where i is the nominal gear ratio.

For a perfect gear while rotating t _Rin of the input shaft to the base _Rin angle Δ t equals the time of rotation of the output shaft _O on the base angle Δ _O

During this time the host _Rin N periods (1) of the sequence of the input shaft encoder pulses and the _O N period of the output shaft sensor pulse sequence

where ƒ _in , ƒ _out are sequence frequencies.

For the perfect gearbox

To comply with condition (5), it is necessary

accordingly, for the base angles we get

For real gear on the selected mode, the test frequency of the rotation ω _Rin output shaft and the frequency ƒ _Rin sequence period T _in constant, and the rotational speed ω _O output shaft and the frequency ƒ _O sequence of periods T _out are variable, hence will not be met, condition (9), t .to. T _o - formula (3) - variable. Summing up the number of phase increments Δ _1, we obtain the base angle, and fixing the time from the moment of counting the phase increments to the end of counting we obtain the rotation time at the base angle of rotation.

The intervals of rotation t _in and t _out at the base angles for a real gearbox will not be equal and are determined by the variability of the gear ratio of the gearbox. Thus, the difference in time intervals

where in accordance with formulas (2), (3) and (6), (7)

t _o = N _o T _{o o} ;

t _in = N _in T _in

uniquely characterizes the variability of the gear ratio of the gearbox. Note that the determination of the quantities t and _O t _Rin by counting periods T _O, T _in significantly reduces requirements for stability _Rin frequency ƒ, ƒ _O and requirements for accuracy sequences forming means (sensors).

The indicated technical result also consists in the fact that in the installation for determining the variability of the gear ratio of the gearbox containing the drive and the electric brake with an excitation winding, kinematically connected to the shafts of the gearbox under test, input and output shaft motion sensors and a shaft motion sensor signal conversion device, each motion sensor made up of two parts, one part is a cup-shaped sleeve mounted on the console part of the shaft, with a flat mirror on the end, fixed angular to the axial line, the other fixed part is made up of a photodetector, a illuminator, forming an optical beam along the axial line of the shaft, and an in-line fiber, the first ends of the optical fibers of which are placed with equal pitch along a coaxial circle with the possibility of interaction with an optical beam reflected from a plane mirror illuminator, and the second ends of the optical fibers are collected on the optical window of the photodetector, while the device for converting the signals of the shaft motion sensors is made in the form of an electronic unit. In the proposed installation, the electronic unit is made up of a control device, a channel of a time interval of the input shaft, a channel of a time interval of the output shaft of the gearbox, the main inputs of which are connected to the outputs of the motion sensors, a comparison circuit, a gating circuit, and a power supply, while the outputs of the control device are connected to the corresponding intermediate inputs of the channels of the time interval, the main outputs of the channels of the time interval are connected to the comparison circuit, and the intermediate outputs to the gating circuit, the first output of which is connected to the comparison circuit, the second to the intermediate inputs of the channels of the time interval, the third is connected to the input of the control device, and each channel of the time interval contains a pulse shaper of signals from the motion sensors of the gearbox shafts, the output of which is connected through the first input of the conjunctor to the counting input of the counter while the second input of the conjunctor is connected to a single output of the control device, the output of the counter through the decoder and the first input of the disjunctor is connected to the reset input of the RS-trig ger, the single output of the latter is connected to the first input of the integrator and the first inputs of the gating circuit, the second inputs of which are the inverse outputs of the RS trigger, while the second input of the disjunctor is the inverse output of the control device, and its direct output is the dynamic input of the RS trigger setup , and the counter reset bus is connected to the inverse output of the control device. In the proposed installation, the comparison circuit is made on two transistors with resistors in the collector circuits, the base of the transistors is connected through the resistors to the common bus and to the main outputs of the channels of time intervals, the power bus is connected to the first output of the gating circuit, and the collector terminals of the transistors are the conclusions of the comparison circuit. The channel time channel integrators are made up of a two-input connector, the output of which through the first resistor is connected to the collector of the transistor, the first output of the capacitor and is the output of the integrator, while the second output of the capacitor, the emitter of the transistor and the first output of the second resistor are connected to a common bus, the second output of the second resistor connected to the base of the transistor and the second output of the gating circuit, and the second input of the conjunctor is connected to the output voltage of the integrators of the power supply unit. The gating circuit is based on a series-connected disjunctor, RS-trigger and two delay lines, three two-input conjunctors, the outputs of two of them are connected to the inputs of the disjunctor, the first inputs of the two conjunctors are potential and connected to the single outputs of the RS-triggers of the channels of time intervals, the second inputs are dynamic along the slice and cross-connected with the first, the inputs of the third conjunctor are the inverse outputs of the RS-triggers of time intervals, and its output is with the reset input of the RS-trigger, the output of the first line the holder is connected to the power bus of the comparison circuit, and the second to the input of the control device, and the control device is made up of a toggle switch, an RS-trigger with an installation disjunctor and an RS-trigger reset disjunctor, the first input of the reset disjunctor is connected to a power supply by a chip on the power supply through the normally closed contact of the toggle switch, the first input of the installation disjunctor is connected to the same power source through the normally closed contact of the toggle switch, the second inputs of the disjunctor are dynamic and connected to the second output gating, the second input of the reset disjunctor corresponds to the front, and the second input of the installation disjunctor corresponds to a slice, the single output of the corrector is connected to the second inputs of the conjunctors and the front-dynamic inputs of the RS-triggers of the time channel channels, and the inverse output is connected to the reset buses of the counters and the second inputs of the disjunctors of time intervals.

The invention is illustrated by drawings:

FIG. 1 - Layout diagram of the installation;

FIG. 2 - Functional diagram of the electronic unit;

FIG. 3 - Integrator circuit;

FIG. 4 - Comparison scheme;

FIG. 5 - Plots of stresses.

Accepted Designations

1. The basis

2. Test gearbox

3. Gearbox input shaft

4. Electric drive motor

5. Friction disk drive

6. DC generator (electric brake)

7. Friction disk of an electric brake

8. The output shaft of the gearbox

9. Input motion sensor

10. Output motion sensor

Sensor:

11. Cup-shaped sleeve

12. The Mirror

13. Photodetector

14. Illuminator

15. Optical beam

16. The light guide

The electronic unit:

17. The comparison scheme

18. Gating circuit

19. Power supply

Input Shaft Channel

20. Pulse former

21. Conjunctor

22. Counter

23. Decoder

24. Disjunctor

25. RS trigger

26. Integrator

Output Time Slot Channel

27. Pulse former

28. Conjunctor

29. Counter

30. Decoder

31. Disjunctor

32. RS trigger

33. Integrator

Control device

34. Toggle switch

35. RS trigger

36. Installation disjunctor

37. Reset Disjunctor

Integrator

38. Conjunctor

Gating circuit

39-41. Conjunctor

42. Disjunctor

43. RS trigger

44, 45. Delay lines

On the base 1, the tested gearbox 2 is fixed, the input shaft drive 3 in the engine 4 with the friction disk 5, which interacts with the cylindrical surface of the shaft. An electric brake is connected to the output shaft, based on a DC generator 6 with an excitation winding and with a rheostat in the armature circuit. A friction disk 7 is attached to the generator shaft, coupled with the cylindrical surface of the output shaft 8. There are two motion sensors: 9 - the input shaft and 10 of the output shaft. Sensors are designed the same way. A cup-shaped sleeve 11 is installed on the cantilever part of the shaft, on the end of which a flat mirror 12 is mounted at an angle to the center line. The second part of the sensor is mounted on the base 1 and contains a photodetector 13, a luminator 14, forming an optical beam 15 and an optical fiber 16 along the center line of the shaft. The first ends of the optical fibers of the optical fiber are placed with equal pitch (equal to the diameter of the optical fiber) along a coaxial circle. With this design, the beam 15 of the illuminator 14 reflected from the mirror 12 circles the circumference of the first ends of the optical fibers. The second ends of the optical fibers are collected on the optical window of the photodetector 13.

The power supply parameters of the motor 4 specify the frequency of rotation of the input shaft 3, and the excitation winding current and the armature rheostat of the generator 6 - the braking moment. In the process of rotation of the shafts, the illuminator beam generates on the photodetectors a sequence of pulses with frequencies ƒ _I on the sensor 9 of the input shaft and ƒ _output on the sensor 10 of the output shaft.

The electronic unit of the installation is made in the form of a separate assembly unit and is designed to process the signals of motion sensors and issue an information signal in accordance with formula (6). The functional circuit of the electronic unit is: channel of the time interval of the input shaft (channel t _in ), channel of the time interval of the output shaft (channel t _o ), comparison circuit 17, gating circuit 18, control device and power supply 19.

Channels t _in and t _{out are of the} same type. Channel t _I contains a shaper 20 of the pulses of the photodetector of the input shaft sensor, a conjunctor 21, a pulse counter 32, a decoder 23, a disjunctor 24, an RS flip-flop 25, and an integrator 26. The channel t _o comprises a former 27, a conjunctor 28, a counter 29, a decoder 30 , disjunctor 31, RS trigger 32 and integrator 33.

The control device is represented by the toggle switch 34 into two positions - “reset” and “measurement”, the toggle switch contains one normally closed contact (H3) and one normally closed contact (HP). There is an RS trigger 35 with input disjunctors 36, 37.

The integrators 26, 33 are made according to the scheme of FIG. 3. The principle of operation is based on the conversion of the pulse _widths t _in and t _out into the amplitude of the pulses based on an integrating RC circuit, composed of a capacitor C and a resistor R1. For such a circuit in a limited portion of the exponent, the voltage across the capacitor is proportional to the duration of the input rectangular pulse. To increase the linearity of the conversion, the integrator is powered by a voltage E _u greater than the supply voltage E of the microcircuit.

цепи стробирования. На выходе интегратора формируется постоянное напряжение

, потенциал которого пропорционален длительности импульсов триггеров 25, 32.The control pulse from trigger 25 (for the second integrator from trigger 32) opens the connector 38 for the duration of the pulse and charges the capacitor C. At this time, the transistor VT is closed by zero bias through the resistor R2 and the discharge circuit is high resistance, therefore, after the end of the input pulse, the voltage across the capacitor ( integrator output voltage) remains constant. After the operation of the comparison circuit 17 (sets the gating circuit 18), the capacitor C is discharged through the transistor VT with a pulse

gating circuit. A constant voltage is formed at the output of the integrator

whose potential is proportional to the duration of the pulses of the triggers 25, 32.

The gate circuit 18 is made according to the scheme of FIG. 4. The circuit is designed to control integrators, a comparison circuit and create feedback for the control device. The circuit is composed of three conjunctors 39-41, a disjunctor 42, an RS flip-flop 43 and two delay lines 44, 45. The first inputs of the conjunctors 39, 40 are connected to the single outputs of the triggers 25, 32, the second inputs are dynamic - these are cutoff pulses. The inputs of the conjunctor 41 are the inverse outputs of the triggers 25, 32. The trigger 43 generates a rectangular pulse with a duration from the first slice to the second. Further, the delay lines of this pulse are sequentially connected.

и импульс задержки

- см. эпюры напряжений фиг. 6.Circuitry delay lines 44, 45 are waiting multivibrators. The gating circuit outputs are a gating pulse.

and delay pulse

- see stress diagrams of FIG. 6.

,

интеграторов 26, 33 и выходной импульс стробирования

. В активной области транзисторов потенциалы коллекторов уменьшаются пропорционально базовым сигнала. Разность электрических потенциалов U_u пропорциональна разности входных потенциалов, следовательно пропорциональна разности длительностей триггеров 25, 32. U_u является информационным импульсом электронного блока и установки.The comparison circuit of FIG. 5 is a balanced amplifier on transistors VT1, VT2, the collector load of which are resistors R2, R3. The initial zero bias is set by resistors R1, R4. The input signals of the comparison circuit are the output potentials

,

integrators 26, 33 and the gate output pulse

. In the active region of the transistors, the potentials of the collectors decrease in proportion to the base signal. The difference in electric potentials U _{u is} proportional to the difference in input potentials, and therefore proportional to the difference in duration of the triggers 25, 32. U _u is the information pulse of the electronic unit and installation.

обеспечит коллекторное питание схемы сравнения, последняя сформирует информационный импульс U_u. Далее фронтом импульса задержки

через дизъюнктор 37 триггер управления будет переведен в исходное состояние. Цикл измерения завершен. Через время равное длительности импульса задержки

срезом этого импульса через дизъюнктор 36 триггер 35 управления будет переведен в единичное состояние и начнется очередной цикл измерения. Поскольку положение импульса стробирования

на временной оси переменно, то фазовое положение угла Δ_вых постоянно смещается. Поэтому с увеличением числа полных оборотов выходного вала итоговый шаг дискретности по выходному валу будет уменьшаться.In the initial position, the toggle switch 34 of the control device is in the “reset” position, through its normally closed contact (H3), a logical unit (power supply E of the microcircuit) is supplied to the input of the disjunctor 37, which holds the control trigger 35 in the initial position. The logical unit at the inverted output of this trigger realizes the initial state of the counters 22, 29. When the toggle switch 34 is switched to the "measurement" position, the voltage front E sets the trigger 35 to a single state and its direct output opens the connectors 21, 28. From this moment, pulses ƒ the sensor _inputs begins to receive the input shaft to the counter input 22 and pulse output shaft _O ƒ sensor - at the counter 29. Note that in the flip-flop 35 flipped front shift control triggers 25, 32 have been set in one state. Upon reaching the number of pulses on the counter 22, corresponding to the angle of rotation Δ _{I, the} decoder 23 will ensure that the trigger 25 returns to zero. Thus, the counting circuit provided an output pulse of the trigger corresponding to the angle Δ _in , while the duration of the output pulse is defined as the interval from the start of rotation of the input shaft at the angle Δ _in to the end of rotation at this angle with the rotation frequency ω _in . A similar pulse will be generated from the signal ƒ _O on the trigger 32. The trigger pulse durations of 25, 26, integrators 32, 33 are converted into electrical potentials (voltage) and arrive at the base inputs of the comparison circuit. Gating impulse

will provide collector power to the comparison circuit, the latter will form an information impulse U _u . Next is a delay pulse front

through the disjunctor 37, the control trigger will be reset. The measurement cycle is complete. After a time equal to the duration of the delay pulse

by cutting this pulse through the disjunctor 36, the trigger 35 of the control will be transferred to a single state and the next measurement cycle will begin. Since the position of the strobe pulse

on the time axis is variable, then the phase position of the angle Δ _{o is} constantly shifted. Therefore, with an increase in the number of full revolutions of the output shaft, the final step of discreteness along the output shaft will decrease.

The method is as follows. Voltages U _4, U ₆ and the power module gear set test mode - the rotation frequency ω _Rin of the input shaft and the braking torque. The toggle switch 34 is moved from the “reset” position to the “measurement” position. At this moment, the trigger 35 of the control device goes into a single state and its front sets the triggers 25, 32 of the time channels in a single state. Simultaneously trigger output unit 35 opens conjunctors 21, 28 and formed formers 20, 27 pulses of motion sensors 9, 10 will begin to fill the counters 22, 29. After the counter 22 sets N _Rin titled output pulses of the decoder 23 translates the trigger 25 to the zero state. Thus, the duration of the output pulse of the trigger 25 is equal to the rotation time t _I input shaft of the gearbox at an angle of rotation Δ _I. Similarly, trigger 32 will generate a pulse of duration t _o corresponding to the rotation angle Δ _{o of the} output shaft of the gearbox.

. Это напряжение пропорционально времени t_вх. Аналогично на интеграторе 33 будет получено напряжение

, пропорциональное времени t_вых вращения выходного вала на угле Δ_вых.During the time t _I there was a charge of the capacitor C of the integrator 26 - plot U ₂₆ . After the end of the pulse t _I voltage on the capacitor of the integrator 26 is

. This voltage is proportional to the time t _I. Similarly, on the integrator 33 will be obtained voltage

proportional to the time t _o rotation of the output shaft at an angle Δ _o .

. Этот импульс является напряжением питания схемы сравнения - фиг. 5. На базы транзисторов схемы сравнения поступают напряжения

и

интеграторов. Пропорционально разности базовых напряжений возникает разность напряжений на коллекторах транзисторов VT1 и VT2. Эта разность является информационным сигналом U_u.The gear ratio of the gearbox may deviate from the nominal value in any direction. Accordingly moments closure trigger pulses 25, 32 are arbitrary - diagrams U _25, U ₃₂ and the diagrams U _'25, U' _35. The gating circuit forms a pulse U ₄₃ , the duration of which is equal to the time interval between the slice pulses of the triggers 25, 32 for any combination. At the end of pulse U _43, the gating circuit generates a read pulse

. This pulse is the supply voltage of the comparison circuit - FIG. 5. The transistor base of the comparison circuit receives voltage

and

integrators. In proportion to the difference in the base voltages, a voltage difference occurs on the collectors of transistors VT1 and VT2. This difference is an information signal U _u .

, который переводит триггер 35 устройства управления в исходное нулевое состояние. По окончании импульса

процесс измерения будет повторяться до тех пор, пока пользователь не перебросит тумблер 34 в положение «сброс». Измерительные импульсы U_u могут фиксироваться регистратором или поступать на дисплей для визуального наблюдения.The gate circuit then generates a delay pulse.

which puts the trigger 35 of the control device in the initial zero state. At the end of the pulse

the measurement process will be repeated until the user flips the toggle switch 34 to the “reset” position. The measuring pulses U _u can be recorded by the recorder or can be displayed for visual observation.

Thus, the proposed method and installation allow to automatically detect the variability of the gear ratio of the gearbox at randomly selected rotation speeds of the input shaft and the braking moments of the output shaft of the gearbox. The design of the installation is quite simple, the electronic unit is built on standard elements of electronics.

Claims (8)

1. The method of determining the variability of the gear ratio of the gearbox, which consists in the fact that they provide the initial values of the input shaft speed, the braking torque of the output shaft of the gearbox and determine the variability of the gear ratio, characterized in that the variability of the gear ratio of the gearbox is determined discretely by the difference in the rotation time of the input and output shafts at the base angles of rotation, while the base angle of rotation of the input shaft is i times greater than the base angle of rotation of the output shaft, where i is n from criminal value of gear ratio. 2. Installation for determining the variability of the gear ratio of the gearbox, comprising a drive and an electric brake with an excitation winding, kinematically connected to the shafts of the gearbox under test, motion sensors of the input and output shafts and a device for converting the signals of the shaft motion sensors, characterized in that each motion sensor is composed of two parts , one part is a cup-shaped sleeve mounted on the cantilever part of the shaft, with a flat mirror at the end fixed at an angle to the center line, the other is not the movable part is made up of a photodetector, an illuminator, forming an optical beam along the axial line of the shaft, and an in-line fiber, the first ends of the optical fibers of which are placed with equal pitch along a coaxial circle with the possibility of interaction with the optical beam of the illuminator reflected from a flat mirror, and the second ends of the optical fibers are assembled on optical window of the photodetector, while the device for converting the signals of the shaft motion sensors is made in the form of an electronic unit. 3. Installation for determining the variability of the gear ratio of the gearbox according to claim 2, characterized in that the electronic unit is made up of a control device, a channel for the time interval of the input shaft, a channel for the time interval of the output shaft of the gearbox, the main inputs of which are connected to the outputs of the motion sensors, comparison circuits , the gating circuit and the power supply, while the outputs of the control device are connected to the corresponding intermediate inputs of the channels of the time interval, the main outputs of the channels of the time int tearing associated with the comparison circuit and outputs the intermediate - a gating circuit, which first output is connected with a comparison circuit, the second - the intermediate inputs of the time slot channel, the third input is connected to the control device. 4. Installation for determining the variability of the gear ratio of the gearbox according to claim 3, characterized in that each channel of the time interval contains a pulse shaper of signals of motion sensors of the shaft of the gearbox, the output of which is connected through the first input of the conjunctor to the counting input of the counter, while the second input of the conjunctor is connected to a single output of the control device, the output of the counter through the decoder and the first input of the disjunctor is connected to the reset input of the RS-trigger, the single output of the latter is connected to the first input of the integrat and the first inputs of the gating circuit, the second inputs of which are the inverse outputs of the RS-trigger, the second input of the disjunctor is the inverse output of the control device, and its direct output is the dynamic input of the RS-trigger setting on the front, and the counter reset bus is connected to the inverse output control devices. 5. Installation for determining the variability of the gear ratio of the gearbox according to claim 3, characterized in that the comparison circuit is made on two transistors with resistors in the collector circuits, the base of the transistors through resistors connected to a common bus and to the main outputs of the channels of time intervals, the power bus is connected to the first output of the gating circuit, and the collector terminals of the transistors are the conclusions of the comparison circuit. 6. Installation for determining the variability of the gear ratio of the gearbox according to claim 3, characterized in that the integrators of the time interval channels are made up of a two-input connector, the output of which through the first resistor is connected to the collector of the transistor, the first output of the capacitor is the output of the integrator, while the second output the capacitor, the emitter of the transistor and the first output of the second resistor are connected to a common bus, the second output of the second resistor is connected to the base of the transistor and the second output of the strobing circuit, and the second input of the conjunctor is connected to the output voltage of the power supply integrators. 7. Installation for determining the variability of the gear ratio of the gearbox according to claim 3, characterized in that the strobing circuit is based on a series-connected disjunctor, RS-trigger and two delay lines, three two-input conjunctors, the outputs of two of them are connected to the inputs of the disjunctor, the first inputs two conjunctors are potential and are connected to the individual outputs of the RS-triggers of the channels of time intervals, the second inputs are dynamic along the slice and cross-connected to the first, the inputs of the third conjunction are inverse the output outputs of RS-triggers of time intervals, and its output is with the reset input of the RS-trigger, the output of the first delay line is connected to the power bus of the comparison circuit, and the second to the input of the control device. 8. Installation for determining the variability of the gear ratio of the gearbox according to p. 3, characterized in that the control device is made up of a toggle switch, an RS-trigger with an installation disjunctor and an RS-trigger reset disjunctor, the first input of the reset disjunctor is connected to the power supply by microcircuits on the power supply unit through the normally closed contact of the toggle switch, the first input of the installation disjunctor is connected to the same power source through the normally open contact of the toggle switch, the second inputs of the disjunctors are dynamic and connected to the second output the gate is connected to the gate, and the second input of the reset disjunctor corresponds to the front, and the second input of the installation disjunctor corresponds to the cut, the single output of the control device is connected to the second inputs of the conjunctors and the front-dynamic inputs of the RS-triggers of the time interval channels, and the inverse output is connected to the counter reset buses and second inputs of time interval disjunctors.

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