SU834661A1

SU834661A1 - Stopwatch testing device

Info

Publication number: SU834661A1
Application number: SU792797538A
Authority: SU
Inventors: Георгий Ильич Леонов; Марта Даниловна Шифрина; Давид Лейбович Крейнес
Original assignee: Предприятие П/Я В-2539
Priority date: 1979-07-13
Filing date: 1979-07-13
Publication date: 1981-05-30

Description

(54) УСТРОР1СТВО ДЛЯ ПРОВЕРКИ СЕКУНДОМЕРОВ(54) TOOL FOR VERIFICATION OF SECONDOMER

II

Изобретение относитс к измерительной технике и может быть использоважэ в устройствах дл контрол механизмов дл измерени временных интервалов (секундомеров ).The invention relates to a measurement technique and can be used in devices for monitoring mechanisms for measuring time intervals (stopwatches).

Известны устройства дл проверки секундомеров , содержащие электромагниты дл пуска и остановки повер емых секундомеров, генератор импульсов и счетчик образцовых интервалов времени, включающий реле одновременно с пуском секундомеров .Devices for checking stopwatches are known, comprising electromagnets for starting and stopping turnable stopwatches, a generator of pulses and a counter of exemplary time intervals that includes a relay simultaneously with the start of stopwatches.

Недостаток устройства состоит в сравнительно невысокой точности измерени .The drawback of the device is the relatively low measurement accuracy.

Наиболее близким по технической сущности к предлагаемому вл етс устройство, содержащее п каналов измерени , генератор импульсов, счетчик, пусковое устройство и пусковые электромагниты в каждом канале измерени 2.The closest in technical essence to the present invention is a device comprising n measuring channels, a pulse generator, a counter, a starting device and starting electromagnets in each measurement channel 2.

Однако такое устройство имеет сравнительно низкую точность измерени , так как не контролируютс усили на включение и выключение секундомеров.However, such a device has a relatively low accuracy of measurement, since the efforts to turn the stopwatches on and off are not controlled.

Цель изобретени - повыщение точности .The purpose of the invention is to increase accuracy.

Поставленна цель достигаетс тем, что в устройство введены элемент задержки, а вThe goal is achieved by introducing a delay element into the device, and

каждый канал измерени - усилитель-сумматор , тактильный датчик, стабилизаторы по амплитуде дл - предвар ющего импульса и по длительности дл пускового импульса, подключенные первыми входами к тактильному датчику, св занному с пусковым электромагнитом , вторыми - к выходу счетчика и устройства задержки соответственно, а выходами через сумматор-усилитель - к пусковому электромагниту.each measurement channel — an amplifier-adder, a tactile sensor, amplitude stabilizers for a pre-pulse and a duration for a starting pulse, connected by the first inputs to a tactile sensor connected to the starting electromagnet, the second to the output of the counter and a delay device, respectively, and outputs through the adder-amplifier - to the starting electromagnet.

При этом стабилизатор по длительности дл пускового импульса содержит триггер, первый вход которого подключен к выходу устройства задержки, а второй - к выходу тактильного датчика, и ждущий мультивибратор , включенный на выходе триггера, причем выход ждущего мультивибратора подS ключен ко входу сумматора-усилител .In this case, the stabilizer has a trigger for the trigger pulse, the first input of which is connected to the output of the delay device, and the second to the output of the tactile sensor, and a standby multivibrator connected to the output of the trigger, and the output of the standby multivibrator is connected to the input of the amplifier-amplifier.

Тактильный датчик содержат двухконтактное устройство с тарированной пружиной .The tactile sensor contains a two-contact device with a calibrated spring.

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

Claims

The device contains a pulse generator 1 (for example, a quartz crystal) and a starting device 2 (a button with a closing contact), which are connected to a preset 3 with a counter (for example, type F 5007). The output of the counter 3 is connected to the input of the delay device 4 (for example, a standby multivibrator) and the amplitude inputs of the stabilizers 5 for a preamp pulse of a booster amplifier (for example, linearly rising voltage generators with memory). The number of stabilizers corresponds to the number of simultaneously turning stopwatches (5 |, 5g, ---,. Each stabilizer 5i is connected to the corresponding adder-amplifier 6i (to the left input). The output of the delay device 4 is connected to the inputs of the limiters 7 of the starting amplifier, for example , on the trigger, and the outputs of the stabilizers 7 i, 7 z, --- Jn., for the duration of the starting pulse (limiters) are connected to the right inputs of the adders-amplifiers 6 I, 62, -, 6j /. The outputs of the adders-amplifiers are connected to the rollers 8 |, -., 8 electromagnetic triggers (electromagnets), whose moving cores are mechanically connected to the trigger heads of stopwatches 9 (, 9g .---. 9 / g through tactile sensors 10 i, 10, ..., 10, consisting, for example, of two calibrated springs with contact devices. The left input of the tactile sensor 10, configured for a smaller force, is connected to the control input of the stabilizer 5i, to force the pressure, and the right input, which is configured to a greater force, to the control input of the limiter 7 of the starting force. The device works as follows. After pressing the trigger 2, counter 3 starts working, counting the number of pulses of the generator 1. At the output of counter 3, two pulses appear — at the moment of start and at the moment when the counted number of pulses is compared with the predetermined number of presets. The first pulse is used to crank and start the stopwatches, the second pulse is used to crank and stop, and the operation of devices 4-8 and 10 of the flowchart is the same in both cases and is as follows. The impulse from the output of the counter 3 is applied to the stabilizers 5, which press down, which create linearly increasing voltage pulses. These pulses through the adders-amplifiers 6 are fed to the rollers 8 of the electromagnetic trigger mechanisms and their cores are set in motion. Moving, the core removes the springs of the tactile sensor 10 (and thus brings the contacts in its contact device closer), and also presses the stopwatch head 9. Due to the fact that the voltage at the output of the stabilizer 5, the pressing force rises linearly, the contacts of the tactile sensor 10 gradually approach each other. and the stopwatch head 9 is gradually pressed in. The contact device of the tactile sensor 10 connected to its left input is adjusted so that it operates (contact closes) earlier than the stopwatch. At the moment when this occurs, the contact connected to the control input of the stabilizer 5 by the pressing force switches the mode of the latter to memorizing the achieved value of the output voltage. Thus, the stopwatch head 9 remains in the compressed, but not actuated position. In this state, the stopwatches remain until a pulse appears at the output of the delay device 4. This pulse is fed through the start-up force limiter 7 to the right input of the summing amplifier 6, and then also to the coil 8 of the electromagnet, which informs its core of a fast movement, strongly compressing the springs of the tactile sensor 10 and causing the stopwatch to operate. To limit the duration of the received pulse (and thus prevent the mechanism of the stopwatch from being damaged), a second contact of the tactile sensor 10 is used, the spring of which adjusts to a force slightly exceeding the response time of the stopwatch. When the force developed by the trigger 8 by the mechanism 8 reaches this set value, the second contact of the tactile sensor 10 connected to the control input of the limiter 7 of the starting force closes. In the limiter 7, a trigger is triggered and resets the pulse arriving at the adder-amplifier 6, which, in turn, returns the core of the mechanism 8 to the initial state. The process of starting (stopping) the stopwatches ends there. Due to the use of tactile sensors and process control units in the proposed device, press the stopwatch head and the start (stop) process to significantly reduce the uncontrolled delay between the electrical start / stop pulse and the corresponding mechanical impulse while simultaneously protecting the stopwatches from damage, which ensures accuracy and device reliability. Claims of the invention. A device for checking seconds, containing n measurement channels, a pulse generator, a counter, a starting device, starting electromagnets in each measurement channel, characterized in that, in order to improve the accuracy, a delay element is inserted into the device, and each measurement channel - amplifier-adder, tactile sensor, amplitude stabilizers