SU864237A1

SU864237A1 - Electronic stopwatch

Info

Publication number: SU864237A1
Application number: SU792843194A
Authority: SU
Inventors: Евгений Викторович Михайлов; Алексей Иванович Захаров; Владимир Васильевич Казаков; Владимир Николаевич Васильев; Виктор Павлович Зубченко
Original assignee: Предприятие П/Я Г-4257
Priority date: 1979-11-21
Filing date: 1979-11-21
Publication date: 1981-09-15

Description

Изобретение относитс к часовой проьышпенности и может быть использовано в качестве устройства дл измерени интервалов времени. Известен электронный секундомер, содержащий генератор временных импу сов, коммутатор, вьпсод которого под ключен ко входу пересчетных схем счетчика пр мого .счета, дисплей,логические схемы И, при этом вьгходы логических схем И соединены со вхо ,дами счетчиков и входами логической сборки, выход которой подсоединен к входу Сброс счетчика l. Наиболее близким техническим решением к изобретению вл етс электронный секундомер с внешним управлен ем, содержащий блок ручного управлени , первый и второй управл емые кпю чи, генератор временных импульсов, блок внешиего управлени , три логических схеМ) И, логическую схему , управл емый счетчик команд, счетчик секундомера и управл емый дисплей, причем выход блока ручного управлени через первый управл емый ключ соединен со счетным входом управл емого счетчика команд, а выход генератора временных импульсов через второй управл е в € ключ соедиг ней со входом счетчика .секундомера, выходы которого соединены со входа « управл емого диспле , при соответствующие выходы блока внешнего управлени через первые входы логических схем И соединены с соответствующими установочныьад вxoдa м управл емого счетчика команд 2. Недостатком этого секундомера вл етс низка помехоустойчивость и надежность ущ авлени . Цель изобретени - повышение помехоустойчивости и надежности управлени секундомера. Цель достигаетс тем, что в электронный секундомер с внешним управлением , содержащий блок ручного управлени , первый и второй управл емыеThe invention relates to a time interval and can be used as a device for measuring time intervals. There is an electronic stopwatch containing a generator of time impulses, a switch whose output is connected to the input of the counting circuits of the forward meter, displays, logic circuits AND, while the inputs of the logic circuits AND are connected to the inputs, counters and inputs of the logical assembly, the output which is connected to the Reset counter input l. The closest technical solution to the invention is an electronic stopwatch with external control, containing a manual control unit, the first and second controlled controls, a time pulse generator, an external control unit, three logic circuits) And, a logic circuit, a controlled command counter, a stopwatch counter and a controlled display, the output of the manual control unit through the first controlled key connected to the counting input of the controlled command counter, and the output of the time pulse generator through the second controlled The key is connected to the input of the counter. Stopwatch, the outputs of which are connected to the input of the controlled display, with the corresponding outputs of the external control unit through the first inputs of the logic circuits And connected to the corresponding settings of the control counter 2. The disadvantage of this stopwatch is low noise immunity and reliability The purpose of the invention is to improve the noise immunity and reliability of the control of the stopwatch. The goal is achieved by the fact that in an electronic stopwatch with external control, containing a manual control unit, the first and second controlled

ключи, генератор временных импульсов блок внешнего управлени , три логических cxeNfid И, логическую схему ШШ управл е1 шй счетчик команд, счетчик секундомера и управл емый дисплей, причем выход блока ручного управлени через первый управл екшй ключ соедимен со счетным входом управл емого счетчика команд, а выход генератора временных импульсов через второй управл емой ключ соедииеи со входом секундомера, выхода которого соединены со вxoдa в{ управл емого диспле , при этом соответствуннцив ш 1ходы блока внешнего управлени через периые входы логических схем И соединены с соответствующими установочными входами управл емого счетчика команд, введен Й5-триггер,5-вхо которого соединен с выходом первой логической схеШ) И, а инверсный выход RS-триггера соединен со вторым входом первой логической cxef« j И и управл ющим входом первого управл емого ключа, первый выход управл емог счетчика команд соединен с первым входом логической схемы ИЖ, управл ющим входом второго управл емого ключа и вторым входом второй логической схемь И, второй выход управл емого счетчика команд соединен со вторыми входом логической ИЛИ, вторым входом третьей логической И и обнул ющим входом счетчика секундомера, выход третьей логической схемы И соединен с R-входом RS-триггера, а выход логической схемы ШШ соединен с управл ющим входом дасгше .keys, time pulse generator, external control unit, three logical cxeNfid I, logic block W, control command counter, stopwatch counter, and controllable display, the output of the manual control unit via the first control key is connected to the counter input of the control command counter, and the output of the time pulse generator through the second controlled key is connected with the stopwatch input, the output of which is connected to the input to the {controlled display, with the corresponding output of the external control unit through the first input The s and L logic circuits are connected to the corresponding installation inputs of the controllable command counter, a H5 trigger is entered, the 5 input of which is connected to the output of the first logic circuit I, and the inverse output of the RS flip-flop is connected to the second input of the first logic cxef & j and control The first input of the controlled key, the first output of the control command counter is connected to the first input of the IZH logic circuit, the control input of the second controlled key and the second input of the second AND logic circuit, the second output of the controlled counter of commands is connected to the second input of the logical OR, the second input of the third logic AND and zeroed yuschim stopwatch counter input, the output of the third AND gate is connected to the R-input of RS-flip-flop, and an output logic circuit Hilti connected to a control input dasgshe.

1one

На черте е приведена блок-схема секундомера.On the drawing e shows the block diagram of the stopwatch.

Электронный секундомер с внешним управлением содержит блок ручного управлени 1, и второй управл e s Ie ключи. 2 и 3, генератор временных импульсов 4, блок внешнего управлени 5, три логические схемы И 6-8, логическую схему ШМ 9, управл емый счетчик соманд 10, счетчик И секунДогиюра , управл емый да1СШ1ей 12 и ftS-триггер 13, причем выход блока ручного управлени i через первьй управл е{вл1 ключ 2 соединен со счетшлм входом управл емого счетчика команд 10, а выход генератора временных им11ульсов 4 через второй управл емый ключ 3 соединен со входом счетчика 11 секундомера, выходы ко .торого соединены со входами управл емого диспле 12, при этом соответствуквще выходы блока внешнего управлени 5через первые входы логических схем И 6 - 8 соединены с соответствующими входа{ ш управл емого счетчика команд lOi RS-триггер 13, S-вход которого соединен с выходом . первой логической схемы И,а инверсный выход RS-триггера соеда нен с управл ющ{м входом первого управл емого ключа 2 и вторым вхЬдом первой логической И 6. Первый выход управл емого счетчмкл команд 10 соедагнен с першам входом логической схемы ИЛИ, упраал к щим входом второго управл емого ключа 3 и вторьм входом второй логической И 7.The electronic stopwatch with external control contains a manual control unit 1, and the second control is e s Ie keys. 2 and 3, a time pulse generator 4, an external control unit 5, three logic circuits AND 6-8, a logic circuit CM 9, a controllable counter, command 10, a counter AND a secDiair, controlled by DC112 and an ftS trigger 13, and the output of the block manual control i through the first control key Vl1 key 2 is connected to the counting input of the controlled command counter 10, and the output of the time pulse generator 4 is connected via the second control key 3 to the counter input 11 of the stopwatch, the outputs of which are connected to the inputs of the controlled display 12, with the corresponding output rows 5cherez external control unit first inputs of AND logic circuits 6 - 8 are connected to respective inputs {u controllably counter commands lOi RS-trigger 13, S-input of which is connected to the output. the first logic circuit And, and the inverted output of the RS flip-flop is connected to the control input of the first control key 2 and the second input of the first logic AND 6. The first output of the controllable counter 10 commands is connected to the input of the logic circuit OR, which controls the input of the second controlled key 3 and the second input of the second logical AND 7.

Второй выход управл емого счетчика команд 10 соединен со вторым входом логической ШИ 9, выход которой соединен с управл кщим входом диспле 12. Второй выход управл емого счетчика команд 10 соединен также со вторым входом третьей логической схемы И 8 и обнул юадам входом счетчика П секундомера, выход третьей логической И 8 соединен с R-BXOдом триггера 13.The second output of the controlled command counter 10 is connected to the second input of logic 9, the output of which is connected to the control input of the display 12. The second output of the controlled command counter 10 is also connected to the second input of the third logic circuit 8 and wrapped around the input of the counter P of the stopwatch, the output of the third logical AND 8 is connected to the R-BXO of trigger 13.

В начальном состо нии управл е1 влй счетчик команд 10, счетшк 11 секун-; домера и RS-триггер 13 обнулены,обнуление осуществл етс , например, при включении на1ф жени питани .In the initial state of the control, the command counter is 10, 11 seconds; The pre-clock and the RS flip-flop 13 are reset to zero, for example, when power is turned on.

В этом случае первый управл ем: ключ 2 открыт, а второй управл емой ключ 3 закрыт, дисплей 12 выключен, так как с выходов управл емого счетчика команд 10 снимаютс напр жени логических нулей, поэтому на выходе логической схемы ИЛИ 9 и управл ющем входе диспле 12 также присутствует логический ноль.In this case, the first control: the key 2 is open, and the second controlled key 3 is closed, the display 12 is turned off, because the voltages of logical zeroes are removed from the outputs of the controlled command counter 10, so the output of the logic circuit OR 9 and the control input of the display 12 also has a logical zero.

Claims

In the case of manual control from the output of the manual control unit I, a sequence of pulse voltages is taken, the characteristics of the Start and Stop and Reset stopwatch command commands. Since the control key 2 is open by the voltage applied to its control input from the inverse output of the RS-trnger 13, all command voltages are freely transmitted to the counting input of the control counter 10. At the input of its first impulse Start at its first output is formed by the voltage level of a logical unit. This voltage pushes the control input of the second control key 3 and opens it, at the same time the same voltage through the logic circuit OR 9 goes to the control input of the display 12 and turns it off. As the second control key 3 is open, then The counter 11 of the stopwatch receives a pulse voltage with a frequency determined by the required accuracy of timing, for example, tenths of seconds. This voltage is removed from the output of the time pulse generator 4. The display 12 displays the current pass information. BEM time since the arrival of the first team. When a command voltage command 10 of the second voltage pulse (Stop) arrives at its input, the level of a logic unit is formed at its second output, and the second control key 3 closes at the first logic zero, and the output pulses from the output of the time pulse generator 4 counters. P stopwatch does not arrive. And since at the output of the logic circuit 9, BBC 9 and the control input of the display 12 there is a logic one level, then the display 12 displays information about the elapsed time between the Daum command pulses (Start-stop. When the control counter of the command 10 arrives at the input of the third pulse ( Reset) the last one is zeroed, the same as the stopwatch counter 1I, because the voltage at the second output of the control counter of the commands 10 becomes equal to zero. The display is turned off because the voltage at the input of the logical element OR 9 It is zero. The stopwatch is operated in the same sequence with manual control. With external control, the command voltage is removed from the first output of the external control unit 5 Since the second input of the first logical cxeie i I 6 contains the voltage taken from the inverse output RS -trigger 13, then the output voltage of the first logic circuit AND 6 arrives at the S input of the RS flip-flop 13 and overturns it, at the same time this voltage goes to the installation input of the control command counter 10. Blind: note that yes chmpulsa Start first second and third logic AND circuit 7 and 8 are closed, so the interfering signals supplied to the first inputs of these logic alementov at input controllably counter command 10 is not received. The presence of command signals on these channels may be due to interference. For example, when cnopTHBi & ix are set up to KOMaHjopj Start, there may be random photomultiplyings. After receiving the first Start command, the first control key 2 is closed, as the RS flip-flop 13 is tilted, closed for this reason, the first logical element I. 6, from the output of which a single pulse is taken, the duration of which is determined by the tilting time of the RS flip-flop 13. All subsequent signals that are not valid on the first output of the external control unit 5 will not be sent to the first input of the controlled command counter 10. the operation of the controlled command counter 10, the voltage of the logical unit is removed from its first output. This voltage opens the second control key 3, prepares the second logic circuit AND 7 to receive the second signal (Stop) and through the logic element OR 9 turns on the display 12, which displays the current time. Since the first control key 2 is closed, the manual control the stopwatch becomes impossible, this circumstance allows to eliminate time counting failures in case of accidental manual control. When the voltage is applied at the second output of the external control unit, for example, at the intersection of a photo4v1nia, the output voltage of the second logical element I 7 is removed, which is applied to the second installation input of the controlled counter Comand 0, and the last operates on the second second output is the voltage of a logical unit. The dvitelnost of the output voltage of the second horizon element And 7 is determined by the switching time of the controlled counting GO. All other pulses, acting on the first inputs of the first and second ohmic circuits AND 6 and 7, will not affect the control 1 1st command counter 0, since there is no voltage of the logical unit on the second inputs of the logic circuits 6 and 7. The output voltage, taken from the second output of the controlled command counter 10, is fed to the second input of the third logic element And 8, preparing it for receiving the Reset signal. Since at the moment of arrival of the stop command pulse, the voltage at the first output of the controlled command signal 10 is zero, the second controlled key 3 is closed and the voltage voltage pulses taken from the output of the time pulse generator 4 to the counter of the stopwatch 11 rie do, therefore, the display 12 displays the time characterizing the gap between the arrival of the first two commands, the display in this case is controlled by the voltage taken through the OR 9 element from the second output of the controlled command counter. the voltage removed from the third output of the external control unit 5 (the Reset command is received through the third logic element AND 8 to the gangway input of the controlled command counter 10 and the R input of the RS flip-flop 13, so they nullify and In the second output of the coman 10 counter, the stopwatch counter 11 is zeroed. As the command counter 10 to be controlled is reset, its output voltages are zero, so the display goes out and the information is not displayed, this display mode reduces power consumption and increases its service life. After the arrival of the signal Reset the stopwatch is ready to re-work with both external and manual control. Thus, new functional connections between the main nodes of the stopwatch help to increase its noise immunity in case of violation of the order of commands and increase the reliability of external control, for example, during a photo start, photo finish, etc. 8 7 Claims of the invention Electronic stopwatch containing a manual control unit, first and second control keys, time pulse generator, external control unit, three AND logic, OR logic, control 14 1st command counter, stopwatch counter and controlled display, the output of the manual control unit is connected via the first controlled key to the counting input of the controlled command counter, and the output of the time pulse generator is connected via the second controlled key to the input of the stopwatch counter, the outputs of which are They are connected to the inputs of the controlled display, while the corresponding outputs of the external control unit are connected through the first inputs of the logic circuit I to the corresponding inputs of the command to be controlled. characterized in that, in order to increase the noise immunity and reliability of control, RS-TpHrreo is entered into it, the S-input of which coe-t is connected to the output of the first logic circuit, and the inverse output of the RS flip-flop is connected to the second input of the first logic circuit And the control input of the first control key, the first output of the control command counter is connected to the first input of the logic circuit lUM, the control input of the second control key on the second input of the second logical AND, the second output of the control counter is connected to the second input OR, the third input of the third logical AND, and wrapped its input with the stopwatch counter, the output of the third AND logic circuit is connected to the R input of the RS flip-flop, and the “1p logic input 11PI” connection is connected to the control input of the display. Sources of information taken into account during the examination 1. Germany, N 282312, cl. G 04 F 3/06, 1979.

2. US patent 4079583, cl. 58-39.5., 1977.