SU699430A1

SU699430A1 - Device for measuring the difference in angular speeds of driving and driven shafts

Info

Publication number: SU699430A1
Application number: SU772524057A
Authority: SU
Inventors: Алексей Андреевич Отставнов; Владимир Викторович Василенко
Original assignee: Саратовский политехнический институт
Priority date: 1977-09-16
Filing date: 1977-09-16
Publication date: 1979-11-25

Description

II

Изобретение относитс к области наг мерительной техники, в частности, к устройствам дл измерени разности угловых скоростей ведомого и ведушего валов и может быть использовано дл проверки сцеплений автомобилей на станiWHX и базах технического обслуживани и автотранспортных и авторемонтных предпри ти х.The invention relates to the field of nagging equipment, in particular, to devices for measuring the difference between the angular velocities of the driven and driving shafts and can be used to test the clutches of automobiles on the WHX and maintenance bases and motor transport and auto repair plants.

Известно устройство дл определени разности угловых скоростей ведомого и ведущего валов, позвол юшее установить наличие пробуксовки сцеплени автомобил и содержащее измерительный орган, выполненный в виде стробоскопического прибора, включающего в себ импульсную лампу с высоковольЧ ным электрод л, конденсатор , резистор и источник питани A device is known for determining the difference in the angular velocities of the driven and driving shafts, which makes it possible to determine the presence of slippage in the vehicle and contains a measuring element made in the form of a stroboscopic instrument, including a flash lamp with a high-voltage electrode, a capacitor, a resistor and a power source.

1.one.

Устройство подсоедин етс к автомобилю в двух точках: к проводу прерывател -распределител зажимом типа кро кодил и к свече зажигани первого imлиндра Двигател при помощи специаль-The device is connected to the car at two points: to the switch-distributor breaker wire with a crocodil clip and to the spark plug of the first cylinder of the engine using special

22

ного переходника, вставл емого в разрыо свечного провода.plug adapter inserted into the spark plug wire.

В процессе проверки сцеплени aatoмобил лампу прибора устанавливают таким образом, чтобы ее вспышки, частота которых пропорциональна оборотам вала ддагател , освещали крестовину кардана автомобил у главной передачи. Если пробуксовки сцеплени кат, то крестовина кардана будет казатьс неподвижной. В случае пробуксовки сцеплени крестовина кардане будет как бы медленно Чэащатьс ипк будут наблюдатьс рывки.In the process of checking the aato-mobile device's lamp, the device is installed in such a way that its flashes, whose frequency is proportional to the speed of the ddagatel's shaft, illuminate the cardan's crossbar at the main gear. If the slip clutch cat, then the cardan shafts seem fixed. In the case of slipping of the coupling, the cross of the cardan shaft will, as it were, slowly twitch, and jerks will be observed.

Недостатком описанного устройства вл етс приближенна оценка эффективности действи сцеплени , при которой результаты контрол не могут быть выражены в каких-либо е.диницах измерени .The disadvantage of the described device is an approximate evaluation of the effectiveness of adhesion, in which the results of the control cannot be expressed in any units of measurement.

Наиболее близким к изобретению по технической сущности и достигаемому результату вл етс устройство дл иэмерени разности угловых скоростей ведомого и ведущего валов, содержащее импуттьсные датчики оборотов, схемы совпадени , один из входов одной из которых соединен с одним из импульсных датчиков оборотов, триггеры, одни из входов двух из которых соединены с шинами сброса, генератор импульсов времени и сч етчик импупьсо в 2.The closest to the invention in technical essence and the achieved result is a device for measuring the difference in the angular velocities of the driven and driving shafts, which contains impedance revolution sensors, coincidence circuits, one of the inputs of one of which is connected to one of the impulse revolution sensors, triggers, one of the inputs two of which are connected to dumping buses, a time pulse generator and a pulse meter in 2.

Недостатком известного устройства 1вп етс его сложность.The disadvantage of the known device 1 is its complexity.

11епь изобретени - упрощение устройства . ,The invention of the invention is a simplification of the device. ,

Указанна цепь достигаетс тем, что счетчик импульсов выполнен реверси в ным и соединен одним из входов с выходами второй и третьей схем совпадени , один из входов каждой из которых соединен с генератором импульсов времени, а другие с выходами соответственно четвертой и п той схем совпадени , одни из входов которых соединены соответственно с выходами первого и второго триггеров , а другие - с одним на выходов четвертого и п того триггеров, счетные входы которых соединены соответственно с другим импульсным датчиком оборотов и выходом первой схемы совпадени , а другие выходы - со вторыми входами первого и второго триггеров, причем другой выход первого триггера дополнительно соединен с другими входами счетчика импульсов и первой схемы совпадени .This circuit is achieved by the fact that the pulse counter is reversed and connected by one of the inputs to the outputs of the second and third matching circuits, one of the inputs of each of which is connected to a time pulse generator, and the others to the outputs of the fourth and fifth matching circuits, one of the inputs of which are connected respectively to the outputs of the first and second triggers, and the others with one to the outputs of the fourth and fifth triggers, the counting inputs of which are connected respectively to another pulse speed sensor and the output ne howl coincidence circuit and the other outputs - to the second inputs of the first and second flip-flops, and the other output of the first flip-flop is further coupled to the other inputs of the pulse counter and the first coincidence circuit.

На чертеже изображена блок-схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.

Устройство включает в себ датчик 1 скорости врашеии ведомого, например карданного, вала, датчик 2 скорости вращени ведущего, например коленчатого, вала двигател , выходы которых подключены к ВХОДЁ1М соответственно формирователей 3 и 4 импульсов, образующих совместно с датчиками i и 2 импульсны датчики оборотов, триггеры 5, 6, 7, 8, ОД1Й1 входы триггеров 5 и 7 соединены с шиной импульсов сброса, а вторые их входы с одними И13 выходов соответственно триггеров 6 и 8, схемы совпадени 9, 1О, 11, 12 и 13, одни входы схем совпадени 9 и 12 соединены с о вими из выходов соответственно триггеров 5 и 7, вторые их входы - со вторыj«iH выходами соответственно триггеров 6 и 8, а выходы - с одними входами соответственно схем совпадени Ю и 11, выходы формирователей 3 и 4 импульсов подключены соответственно к счетному входу триггера 6 непосредственно и через один из входов схем совпадени 13 к счетномзЬ) входу триггера 8, генера Ч )р 14 -импульсов времени, выход котороге подключен ко вторым входам схем совпадени 10 и 11, и реверсивный счетчик 15 импульсов, вход которого соединен с выходами схем совпадени 10 и 1 причем второй выход триггера 5 подключен к реверсивному счетчику 15 и ко второму входу схемы совпадени 13.The device includes a speed sensor 1 at the slave, for example, a universal joint, a shaft, a speed sensor 2 for the driving speed, for example a crankshaft, an engine shaft, the outputs of which are connected to INPUT-1M respectively of the formers 3 and 4 pulses, forming together with the sensors i and 2 the speed sensors, triggers 5, 6, 7, 8, ОД1Й1 inputs of triggers 5 and 7 are connected to a reset pulse bus, and their second inputs with one I13 outputs respectively of triggers 6 and 8, coincidence circuits 9, 1О, 11, 12 and 13, one inputs of circuits matches 9 and 12 are connected to of the moves, respectively, of the flip-flops 5 and 7, their second inputs — with the second iH outputs, respectively, of the flip-flops 6 and 8, and the outputs — with the same inputs, respectively, of the coincidence circuits Yu and 11, the outputs of the formers 3 and 4 pulses are connected to the counting input of the trigger 6, respectively, and through one of the inputs of the coincidence circuit 13 to the counting input of the trigger 8, generation H) p 14 pulses of time, the output of which is connected to the second inputs of the coincidence circuit 10 and 11, and a reversible counter 15 pulses, the input of which is connected to the outputs of the coincidence circuit 10 and 1 and the second output of the trigger 5 is connected to the reversible counter 15 and to the second input of the coincidence circuit 13.

Датчики 1 и 2 предназначены дл выдачи за один оборот вала по одному импульсу . Оба они могут быть магнитоэлектрического типа и состо т из неподвижной и подвижной частей. Неподвижна часть каждого датчика изготовлена в виде индукционной катушки, установленной на корпусе датчика, а подвижна часть в виде посто нного стержневого магнита. Посто нный стержневой магнит в датчике скорости вращени коленчатого вала встроен в торец стержн , посаженного на вал датчика, соединенный с носком коленчатого вела, а в датчике скорости вращени карданного вала укреплен на металлической ленте, установленной с помощью зажима через резиновую прокладку на карданном валу.Sensors 1 and 2 are designed for outputting one pulse per shaft revolution. Both can be of the magnetoelectric type and consist of fixed and moving parts. The fixed part of each sensor is made in the form of an induction coil mounted on the sensor body, and the movable part in the form of a permanent bar magnet. A permanent rod magnet in the crankshaft rotation speed sensor is embedded in the end face of the rod mounted on the sensor shaft connected to the crankshaft tip, and in the rotation speed sensor of the propeller shaft mounted on a metal tape installed with a clip through a rubber gasket on the cardan shaft.

Формирователи 3 и 4 импульсов служат дл усилени импульсов, ограничени их по амплитуде и формировани по длительности. Каждый из них может быть выполнен, в виде двухкаскадного электронного усилител , снабженного эмиттерными повторител ми на входе и выходе.The shapers of 3 and 4 pulses serve to amplify the pulses, limit them in amplitude, and form in duration. Each of them can be made in the form of a two-stage electronic amplifier equipped with emitter followers at the input and output.

Триггеры 5 и 7 предназначены дл управпентТЯ работой схем совпадени соответственно 9, 13 и 12 и выполнены с раздельными входами. Триггеры 6 и 8 служат дл делени всех поступающих на их входы импульсов на четные и нечетные и выполнены со счетными входами ,Triggers 5 and 7 are designed to control the operation of the coincidence circuits 9, 13 and 12, respectively, and are made with separate inputs. Triggers 6 and 8 are used to divide all pulses arriving at their inputs into even and odd ones and are made with counting inputs,

Схемы совпадени 9, 1О, 11, 12 и 13 предназначены дл выдачи на их №i- ходах положительных сигналов при наличии на их входах отрицательных сигналов . Схемы совпадени 9 и 13 управл ютс триггером 5, схема совпадени 12 триггером 7, схемы совпадени 10 и 11 соответственно схемами совпадени 9 и 12. На выходе схем совпадени 9 и 12 установлены инвенторы дл изменени фазы сигнала на 180.Coincidence circuits 9, 1О, 11, 12, and 13 are intended for issuing positive signals on their # i-turns if there are negative signals on their inputs. The matching circuits 9 and 13 are controlled by the trigger 5, the matching circuit 12 by the trigger 7, the matching circuits 10 and 11, respectively by the matching circuits 9 and 12. At the output of the matching circuits 9 and 12, inventories are set to change the signal phase by 180.

Claims

The generator of 14 time pulses serves as a source of electrical oscillations of increased stability with a frequency of 2.1 MHz. The generator can be made in the form of serially connected master node, emitter follower, pulse amplifier and the second 56 emitter repeater assembled on transistors .. Reverse counter 15 is designed to count the pulses produced by the generator 14 time pulses, during one turn of the cardan vape and in time odnehkh crankshaft engine revolutions. When calculating the first duration, the counter works on summation, and when calculating the second duration - on subtraction. The counter is six-digit, six-bit, each bit of which consists of a scaling device, a decoder and a digital indicator. The counter operation is controlled by a separate sign trigger included in the counter 15. The device operates as follows. After installing the speed sensor 1 of the propeller shaft and the speed sensor 2 of the engine crankshaft and supplying the supply voltage to the vehicle, the pulses enter the inputs of the formers 3 and 4 pulses when the engine is running and the clutch is engaged, they are amplified, durable and limited in duration amplitude. By a manual reset pulse, all the device nodes come to the state shown in FIG. 1, in which the triggers 5, 6, 7, and 8 are in the state O, the coincidence circuits 1O, 11 13 are closed, and the coincidence circuits 9 and 12 are open, the trigger of the sign of the reversible counter 15 is also set to O, which is why the counter is prepared for work on summation. After the signal is removed, the reset pulse from the rotation speed sensor 1 of the drive shaft, the pulse generator 3 has passed, the trigger 6 arrives at the counting input and transfers it to state 1. The pulses produced by the crankshaft rotation speed sensor 2 pass through the pulse former 4 , but the trigger 8 does not reach, due to the closed state of the coincidence circuit 13. At the moment of fling the trigger 6 to the opposite state, at the output of its right half, a positive signal is released, which is fed to the input of trigger 5, but th of audio is not changed, as It appears reverse polarity. At the output of the left half of the flip-flop 6, a negative voltage is released, which, when it enters the input of the coincidence circuit 9, forms with the negative voltage already at the other input of the trigger voltage of the flip-flop 5, the coincidence. The coincidence circuit 9 generates a negative signal at its output, which opens the coincidence circuit 10 Pulses from the pulse generator 14 are fed to the input of the reversible counter 15, which begins to be summed. With the arrival of the next pulse from the imaging unit 3, the trigger 6 returns to the initial state, as a result of which the pulse from the output of its right half enters the input of the trigger Gera 5 and transfers the latter to the state 1. At the same time, the coincidence in the circuits © 9 disappears and the matching circuit 10 is closed. Reversible counter 15 stops the summation of pulses received by its input from the generator 14 pulses of time. The number of pulses recorded by the counter 15 reflects the duration of one revolution of the drive shaft, corresponding to the speed of its rotation at the time of measurement. Simultaneously with this impulse, which appears at the output of the left half of the trigger 5, is transferred to state 1 of the flip-flop sign of the reversible counter 15, as a result of which it is prepared for subtraction, and the coincidence circuit 13 opens. Pulse from the crank shaft 2 speed sensor 2 the motor, having passed the pulse shaper 4, is fed to the input of the coincidence circuit 13 and forms a coincidence. The signal detected at its output flips the trigger 8 to state 1, as a result of which the circuit 11 opens and the time pulses from the generator 14 arrive at the input of the counter 15, which begins to melt from the previously accumulated one. With the arrival of the next pulse, corresponding to the end of one revolution, from the rotational speed of the crankshaft of the engine, the trigger 8 returns to its original state, and the signal released from the output of its right half triggers the trigger 7 to the opposite state, closing the coincidence circuit 12. In As a result, the coincidence circuit 11 is also closed, and the flow of time pulses from the generator 14 to the counter 15 is stopped. At this the measurement cycle ends, and on the reversible counter 15 a number equal to the difference in the durations of one revolution of the cardan and jagged shafts is fixed, which is proportional to the difference in their Upp speeds. In terms of the number fixed by the reversible counter at a certain predetermined angular velocity of the engine crankshaft, a conclusion is made on the technical condition of the clutch. When there is no slip on the clutch ™, neither the angular speeds of the gimbal led by the autosaw and the engine's crankshaft are equal and the reversible counter 15 shows zeros. Apparatus of the Invention A device for measuring the difference in the angular velocities of the driven and driving shafts, mainly the shafts of a clutch, containing pulse turn-on sensors, a coincidence circuit, one of the inputs of one of which is connected to one of the pulse turn-on sensors, triggers, one of the inputs of two of which are connected with reset buses, a time pulse generator and an impulse counter, characterized in that, for the sake of simplification, the t-pulse counter is reversible and is connected by one of the inputs to the outputs of the second and third circuits One of the inputs of each of which is connected to the generator, time pulses, and the others with the outputs of the fourth and fifth coincide of the fourth and fifth circuits, some of the inputs of which are connected to the first and second triggers, respectively, and others of the fourth and the fifth triggers, the counting inputs of which are connected respectively to another pulse speed sensor and the output of the first coincidence circuit, and the other outputs to the second inputs of the first and second triggers, and another output of the first. the trigger is additionally connected to the other inputs of the pulse counter and the first matching circuit. Sources of information taken into account during the examination 1. N. I. Govorushchenko. Diagnostics of the technical condition of automobiles, M, Transport, 1970, p. 228-230.

2. USSR author's certificate number 4O8218, cl. Q 01 P 3 / 6O, 03.04.72 (prototype).