SU792210A1 - Time indication digital system - Google Patents

Description

(54) DIGITAL TIME INDICATION SYSTEM

The invention relates to instrumentation, in particular to digital information systems, in which information about both current time and temperature is transmitted to secondary display devices in digital form, and can be used to build urban clock systems, as well as industrial clock clock systems. office buildings, sports facilities and other facilities. A device is known for dynamically indicating the time of day and a calendar in which the scale code of the current time and the value of calendar data are transmitted on the primary side and transmitted through the communication line to the secondary clock l. The disadvantage of such a device is a relatively long information transfer time. The closest to the technical essence of the invention is a digital time display system comprising a primary clock consisting of a series-connected crystal oscillator, a frequency divider, a pulse counter, an indicator, a parallel time-to-serial code converter, and the intermediate outputs of the frequency divider are connected to the driver input. marker pulses, the input of the clock generator, the input of the information clock generator, and the input of the caliper body data on the pulse duration, the imager output signal, the input of which is connected to the output of the imaging clock pulses; the communication line and the secondary display device, consisting of a pulse selector, the outputs of which are connected respectively to the inputs of the switch and the decade pulse counter, and digital indicators 2. The disadvantage of such a system is low information content, for example, there is no indication of temperature. The purpose of the invention is to expand the functionality by increasing the amount of information transmitted without changing the parameters of the communication channel. To achieve this goal, in the primary clock, a parameter sensor converter is inserted into a parallel digital code, a parameter sign converter into a serial

the code, the parallel code converters of the decimal bit of the parameter and the single bit of the parameter are in the serial decimal code, the single pulse shaper, the compressor and the dual input circuit OR, and the feo secondary display device is entered with an RS flip-flop, two D-flip-flops, a matching circuit , registers for storing the time code and parameter, two additional digital indicators, a parameter sign indicator and a binary counter with scaling factors equal to four, and in the primary clock, the output of the marker for impulses It is connected to the inputs of the transducer recording entry of a ten-bit bit and a single bit of the parameter, as well as to the input of setting the switch zero and the first input of the OR circuit. The output of the information clock pulse generator is connected to one input of the single pulse generator and the advancing inputs of the converters of the tenth discharge and unit discharge of the parameter, the conversion resolution inputs of which are connected to the corresponding outputs of the switch, the other two outputs of which are respectively connected to the control inputs of the converter the sign of the parameter and the former of the sign of the unit bit of the parameter. The output of the pulse-calibrated pulse shaper is connected to the counting input of the switch and the second input of the single pulse shaper whose output is connected to the gating inputs of the parameter sign converter and the single sign feature generator of the parameter, the two comparison inputs of which are respectively connected to the output of the parameter bit converter and the output of the unit parallel time code to a serial decimal code, with a parallel code about the sign of the parameter and its values of a parameter sensor output transducer is supplied respectively to data inputs of the transducers a decimal sign and discharge unit .razr yes posledonatelny parameter code. The outputs of the sign converters and the decimal bit of the parameter, the output of the generator, the sign of the unit discharge of the parameter, and the output of the parallel time code to serial converter are connected to the remaining four inputs of the OR circuit, the output of which is connected to another input of the output signal generator, while the secondary display device has a marker the output of the selector is connected to the installation input of the units of the decade counter and the R-BXO house of the RS flip-flop, the output of which is connected to the control input of the register of the decimal digit. Informational

the output of the selector is connected to the S input of the R5-trigger and the counting input of the binary counter, the input of the zero setting is connected to the counting input of the switch. The binary counter output is connected to the D-inputs of D-flip-flops, the C-inputs of which are connected to the corresponding outputs of the switch, the last output of which is connected to the first input of the coincidence circuit, the second input of which is connected to the output of one D-flip-flop. The output of the other i) trigger is connected to the parameter sign indicator, and the output of the coincidence circuit is connected to the control input of the bit register. The information inputs of all registers are combined and connected to the corresponding outputs of a ten-day pulse counter, and the outputs of these registers are connected to Digital Indicators. The switch outputs are connected to the control inputs of the registers that store the time code.

FIG. 1 shows a structural diagram of the primary clock of the system, FIG. 2 а-н given time diagrams for their work; in fig. 3 shows a block diagram of a secondary display device; in fig. 4 ak - timing diagrams that explain his work.

As a sensor, a parameter in the circuit includes a temperature sensor.

The primary clock contains a crystal oscillator 1, a divider 2, frequency counters 3 pulses, digital indicators 4 a converter 5 parallel current time code to a serial decimal code, a shaper 6 marker pulses, a shaper 7 clock pulses, a shaper 8 information clock pulses, shaper 9 calibrated by pulse duration, driver 10 unit pulses, switch 11, converter

12 parallel code of ten degrees temperature to a serial decimal code converter

13 parallel code of units of temperature units in series serial decimal code, scheme OR 14, converter 15 signs of temperature to serial code, generator 16 sign of units of temperature, converter 17 of temperature into parallel digital code, output signal generator 18 and line 19.

The secondary display device contains a pulse selector 20, a decade pulse counter 21, a switch 22, a binary pulse counter 23 with a conversion factor of four, RS-trigger 24, registers 25 for storing information about current time values, a register 26 for storing values of dec currents of temperature, a register 21 for storing values of temperature degrees, digital indicators 28 for indicating current time values, digital indicator 29 for indicating temperature values, D-flip-flop 30 for storing and information about the sign of the temperature, D-flip-flop 31 for storing information about the degree sign units temperature indicator 32 znaka.temperatury circuit 33 and coincidence. In the primary clock (Fig. 1), the output of the crystal oscillator 1 is connected to the pulse counters 3 through the divider 2, the digital indicators 4 and the parallel-to-serial code converter 5 are connected to the outputs. The intermediate inputs of the divider 2 are connected to the inputs of drivers 6-9, and the output of driver 9 is connected to the combined second inputs of drivers 7, 8 with one input of driver 10 and the counting input of switch 11, the input of which zero is connected to the control input of the converter converters 12, 13, the first input of the circuit OR 14 and the output of the driver b. The output of the windrower 8 is connected to the clock input of the converter 5, the other input of the driver 10 and the pushing inputs of the converters 12 and 13, and the output of the converter 10 is connected to the gate inputs of the converter 15 and the driver 16, and two corresponding outputs of the com / 1hator 11 are connected to controllers converter 15 and driver 16, and the other two are connected respectively to the transducer resolution inputs of converters 12 and 13. The output of converter 5 is connected to the first input of the comparison driver 16, the second input of which is connected to the output of converter 13, wherein information inputs of converters 12, 13 and 15 are connected to the code outputs of temperature converter 17 to a digital code, and outputs of converters 5, 12 and 15 and driver 16 are connected to the remaining four inputs scheme OR 14, the output of which is connected to one input of the imaging unit 18, the other input of which is connected to the output. the driver 7, and the output of the controller 18 through the communication line 19 is connected to the inputs of the secondary clock and the display device. In the secondary display device of FIG. 3 lines of communication 19 are connected to the input of the pulse selector 20, the clock output of which is connected to the counting input of a decade counter 2 pulses, the inputs of the zero setting and the unit of which are respectively connected to the information and marker outputs of the selector 20, the output of the envelope of clock pulses .1sov which is connected to the counting input of the switch 22 and the installation input of the zero binary 1Oh counter of 23 pulses, the counting input of which is connected to the input of the RS flip-flop 24 and the information output of the selector 20, in addition, the march output of the selector and 20 is connected to the input of the zero setting of the switch 22 and the R input of the RS trigger 24. The outputs of the decade counter 21 are connected to respectively the combined information inputs of registers 25, 26 and 27, and the control inputs of the registers 25 are connected to the corresponding outputs of the switch 22, and the outputs registers 25, 26 and 27 - with digital indicators 28 and 29, the output of binary counter 23 is connected to the D-inputs X) -triggers 30 and 31, the C-input of which is connected to the corresponding outputs of the switch 22. Output B, -trigger 30 St. with the indicator 32 signs of temperature, and the output of the D flip-flop 31 is with one input of the coincidence circuit 33, the other input of which is connected to the corresponding output of the switch 22, and the control inputs of the registers 26 and 27 are respectively connected to the outputs of the RS-trigger 24 and the coincidence circuit 33. Digital time display system works as follows. The pulses generated by the quartz oscillator 1 (Fig. 1) are applied. frequency divider 2, from the output of which pulses with a frequency of 1 Hz arrive at a binary counter 3 times, the state of which is indicated by digital indicators 4. Frequency divider 2 outputs from intermediate outputs of frequency divider 6-9 with different frequency, while shaper 9 generates duration-calibrated pulses, the following, for example, with a duty cycle of two (Fig. 2, a). Using these pulses and signals from the splitter 2, the formers 7 and 8 produce bursts of pulses with ten pulses each, and the clock pulses from the output of the imaging unit 7 (FIG. 2, b) are ahead of the information clock pulses from the imaging unit 8 by half the period (FIG. .2, c). The former 6 generates marker pulses (FIG. 2, d), which signify the beginning of the transmission of the sequential decimal code of the current time and follow every sixth clock pulse from the imager 7 (during the transmission of the six-digit current time code), In addition, the marker pulse, arriving at the control input of converter 5, rewrites the potential current time code from counter 3 into it.

With the help of information-clock pulses coming from the generator 8 to the converter 5, the current time information is converted bitwise into a sequential decimal code (Fig. 2, e) and through the OR 14 circuit arrives at one input of the output signal generator 18. One value of the decimal digit is encoded by one pulse which coincides in time with one of the information-clock pulses in the packet, numbered from 0 to 9 (Fig. 2, c). Thus, the values of the ten hours are encoded pulses, which can take three positions relative to the information-clock - this is O, 1 and 2; the values of tens of minutes and tens of seconds are encoded by pulses with positions from 0 to 5, and the values of units of hours and seconds are encoded by positions of pulses relative to information-clock can take from about to 9.

Due to the fact that the duration of the calibrated pulses from the imaging unit 9 is constant, the number of pulses in a packet is both clock (figure 2, b) and information clock (figure 2, is also constant and equal to ten, and the maximum value of the current scale is time is 23 hours 59 minutes 59 seconds, it is possible to use the free places in the ten hours, minutes and seconds to transfer additional information to the secondary devices, such as temperature.

We take a picture of how we will encode additional information about the temperature in the primary clock and transmit it to the secondary display devices.

Usually, the temperature range in the open air throughout the year at mid-latitudes does not exceed ± 50 ° С. At such a temperature range, for example, the temperature sensor 17 to the code is calculated. The sign of temperature, for example, minus, will be encoded by the presence of a pulse, and plus the absence of this pulse.

The number of tens of degrees varies from O- to 4 with a maximum eichenia of 49 ° C, i.e. It has five gradations, and units of degrees are from O to 9 and have ten gradations.

Thus, the values of tens of degrees of temperature will be encoded by pulses that coincide with one of the first information-clock pulses at the moment of transmitting the values of ten hours (Fig. 2, and, c).

The temperature minus sign will encode pulses that coincide with the first information clock pulses at the time of transfer of ten minutes of the current time (Fig. 2, s,

Unlike the sign and tens of degrees of temperature transmitted with the frequency of the time code, the units of degrees of temperature will be transmitted only if the values of units of degrees coincide with the values of units of seconds (FIG. 2, k), and the coding will be impulse coinciding with the first information-clock impulse at the moment of transmission of values of ten seconds of the current time (figure 2, l, c.

Now let us consider the operation of the primary clock when converting a parallel temperature code to a sequential decimal. For this purpose, serves switch 11, which is a pulse counter with a conversion factor of six with a decoder. To the counting input of the switch 11, the pulses calibrated in duration (Fig. 2, a) from the driver output arrive .9. Under the action of these pulses, the switch goes from one state to another by successively generating at its six outputs pulses that coincide in time with the input ones (Fig. 2, e). To the input of the installation of the zero of the switch receives marker pulses from the output of the imaging unit 6 (figure 2, d), which phase its work in time.

The conversion of a parallel temperature code to a serial decimal begins with a high bit, i.e. with ten degrees. In this case, the marker pulse (Fig. 2, d), arriving from the generator 6 at the recording input of the converter 12, rewrites the parallel code of tens of degrees from the converter 17 to the converter 12. Pulse from the first output of the switch 11 (Fig. 2.1, e) The input to the converter 12 allows the conversion. Under the action of information-clock pulses (Fig. 2, c) coming from the imaging unit 8 to the forward input of the transducer 12, information about tens of degrees is converted into a sequential decimal code. This code is in the form of a pulse (Fig. 2, I), coinciding in time, depending on the temperature value, with one of the first five information clock pulses, designated by numbers from 0 to 4 from left to right (Fig. 2, c), from the output shaper 12 through the shaper 18 of the output signal enters the communication line 19 (figure 2, n is the temperature value. As a result, the first packet of pulses after the marker (.fig.2, n) contains ten clock positive polarity and two information negative polarity and following clocks.

To encode the sign of the temperature and the sign of units of degrees, the shaper 10 of information clock pulses from the imaging unit 8 and the calibrated in duration of the pulses from the imaging device 9 (FIG. 2, c, a) produces a series of single pulses (FIG. 2, g), which coincide in time with the first of the packs of information-clock pulses. The sign code - the temperature from the converter 17 is fed to the information input of the converter 15, to the control input of which from the third its output of the switch 11 (Fig. 2.3, the resolution signal arrives. As a result, one of the pulses from the imaging unit 10 (FIG. 2, h) passes the converter 15 and enters the OR circuit 14, from the output of which the shaper 18 then goes in the form of a negative-impulse pulse to the communication line 19 (Fig.2, n), which follows the first clock pulse So, at the time of transfer of tens of minutes of the current time Two information pulses are transmitted — a pulse of the sign of temperature and a value of tens of minutes. If the sign of temperature is +, then this value is not encoded and not transmitted to the communication line 19. The coding of information about the units of degrees of temperature occurs in two stages. First, the parallel code is converted into sequential decimal, then the obtained code value is compared with the value of units of seconds of time and, if there is equality, a signal is generated that indicates units of degrees of temperature. The converter 17 receives a parallel code about the value of units of temperature to the information input of the converter 13, into which it is recorded by a marker pulse from the driver 6. The pulse from the sixth output of the switch 11 (Fig. 2, 6, e), entering the converter 13, allows code conversion. Under the action of information clock pulses (Fig. 2, information about the value of units of degrees coming from the generator 8 to the forward input of the converter 13 is converted into a sequential decimal code. This code is in the form of a pulse (Fig. 2k) depending on the value of the units degrees of temperature will coincide in time with one of the ten information-clock pulses, which are indicated in figure 3 by numbers from 0 to 9 to the right to the left, that is, the converter 13 generates a temperature code format that matches the time code format. This pulse of the unit degree code goes to one input of the compiler 16, to another comparison input which receives the pulse of the unit code of seconds from the output of the hpeater 5. If the units of degrees and seconds are equal, the converter 16 uses signals from the fifth output of the switch 11 2, e, 5 and single pulses from the output (driver 10 (FIG. 2, g) produces a sign signal, units of temperature (figure 2, l), which through the OR 14 circuit, driver 18 of the output signal enters the line connection 19 in the form of a negative pulse oh polarity, following the first clock pulses (figure 2, n). Thus, the values of the units of degrees of temperature are transmitted by the pulse of the indication of units of degrees only when the values of the units of degrees and seconds are equal, i.e. for one second every nine seconds when these values match again. The code of the current time and temperature in the form of two-pole pulsed parcels (FIG. 2, n) through the communication line 19 is fed to the secondary display devices, to the input of the pulse selector 20 (FIG. 3). From the input signal, pulse selector 20 selects clock pulses (Fig. 4, a), which contain ten pulses in a packet, information pulses (Fig. 4, b), marker pulses (Fig. 4, d), and forms the envelope of clock pulses (figure 4, c). Consider first the operation of the device when displaying the values of the current time. At the same time from the output of the selector 20 clock pulses (figure 4, a), arrive at the counting input of the ten-day counter 21, and at its input of the zero setting - information (figure 4, b). Under the action of clock pulses, the counter 21 changes from one state to another, and at the moment of arrival of information pulses is set to the zero state and continues to count the number of clock pulses that have arrived after the information pulse. Thus, in the counter 21, in the intervals between the bursts of clock pulses, the recorded information about each value of the current time is sequentially. As in Fig. 4b, an example of the values of the current time is 14 hours 38 minutes 45 seconds. The pulses of the clock envelope (Fig. 4, c) from the output of the selector 20 arrive at the counting input of the switch 22. The switch 22 undergoes the transition from one state to another under the influence of these pulses, while generating signals at its six outputs (Fig. 4, e) in the intervals between the bursts of clock pulses. For the phasing of the operation of the switch 22 relative to the capacitor 11 (Fig.) Primary clock, there is a marker pulse (Fig. 5, d), which from the output of the selector 20 comes to the input of the setting of the switch 2 zero Pulses from the outputs of the switch 22

, 4, d, acted on managers; : ;; SD ;;;; health registers 25,,; :: - - -::; pt dz bottom alternately with the account- :: ..; -:; ::: and;.; Omen Y; When the comp. :) pin 21 does not change. Ta; t; -; M, the current time information from the serial code is converted into parallel by the counter 21 and the switch 22 and stored in registers 25. If the current time values do not change KOMJ / iyTaTop 22, rewriting the information. And. 10 from the counter 21 to the registers 25. confirms their previous state.

Thus, the introduction of additional electronic information in the code format, the values of temperature does not change the algorithm of the operation of the secondary display device of the current time, since the information pulses of the time code follow the temperature code pulses (Fig. 46), and As a result, in the time intervals between the bursts of clock pulses in the counter 21 is recorded, the values of the current, its time is now recorded. Consider the work of the secondary device when decoding and kg / t-ring to the temperature values. This; - V:; r; onT-v: step to the image.

;, -;,; :: - -: -. Il-iluls (fig, 4, g) with E: g: V: T- :; -I; -; : 1; e: tsra 20 arrives at the input:, -: -, at:::. er1; counter counters 21, with: -g: g: gs; guy 3apyskzayutsya in all the different .-., - ::;.:. ;;; P.: .., h, - goes to R- go to .pnj; iepa 24. With the arrival of the first m; aktsBO1o and 5 pylas from the output of seleto | 3a 20 to the counting input of counter 21 through ((: The first one is null and counts the count; ny; sln / actal remus before the first information pulse (Fig. 4, b) which carries the information about the temperature; the front of this pulse, at the input of the S-flip-flop 24, translates it into the zero state (Fig. 4e, e, and at this time, the signal from the flip-flop 24, arriving at the control input of register 26, the information about the value of ten degrees from counter 2.1 is rewritten to re history 26 In this case, the counter 21, for the duration of the first batch of clock pulses, is set to the zero state several times under the action of the information pulses.

To select the sign — the temperature and the sign of units of degrees — a binary counter 23 with a conversion factor of four. The counting input of this counter receives information pulses (, Fig. 4, b) from the output of the selector 20, and the input of the zero setting — pulses of the envelope of clock pulses from another output of the selector 20 (Fig. 4, c), the leading edge of these pulses coinciding

with the leading edge of the first clock pulse from the packet, the counter 23 is set to the zero state. Thereafter, the counting of information pulses by the counter 23 begins until the next time it is set to the zero state. If one information signal comes to the counting input of the counter 23 for the period of the following envelope pulses (FIG. 4, b, 6}, then

there is no output signal, if

two, then counter 23 issues a signal

(Fig. 4, g) to D-inputs 1) -triggers 30 and 31. When the primary clock transmits a sign - temperature to additional pulses at the moment of transmitting the values of tens of minutes of the current time (figure 2, n, figure 4, b ) the counter 23 generates a signal that coincides in time with the pulse from the third output of the switch 22 (FIG. 4.3, d), which is fed to the synchronization input of the trigger 30 and writes a unit to it (FIG. 4, g). This signal lights on the indicator 32 signs of temperature symbol -.

When the primary clock transmits to the secondary devices the indication of the units of degrees of temperature by an additional pulse at the moment of transmitting information about tens of seconds (FIG. 2, n,

FIG. 4, b), this means that the values of units of degrees of temperature coincide with the values of units of seconds of the current time. At the same time, the counter 23 at the moment of time coinciding with the pulse from the fifth output of the switch 22 (Fig.4.5, d} produces a signal of the unit, the trigger 31 arriving at D-INPUT, which is recorded into it by the pulse from the fifth output / 1 of the switch 22. The signal from the output of the trigger 31 is fed to one input of the matching circuit 33, to the other input of which the signal comes from the sixth output of the switch 22 (FIG. 4, k). This signal passes through the open

a coincidence circuit 33 to the control input of the register 27, to the information inputs of which information is supplied on the values of units of degrees of temperature from the outputs of the counter 21. This information is written to the memory register 27. The recorded values in the registers 26 and 27 are displayed on the digital indicators 29.

Thus, the introduction into the primary clock of a temperature converter into a parallel digital code, a converter of a sign of temperature into a serial code, converters of a parallel code of tens of degrees and units of degrees of temperature into a serial decimal code, a single pulse generator, a switch and a circuit OR for five inputs, and in the secondary display device the introduction of a US flip-flop, two D-flip-flops, a coincidence circuit, registers for storing a time code and temperature, two digital indicators, an indicator the sign of the temperature and the binary counter with a conversion factor, paBHhEvi four, allows the primary clock to transmit numerically the current time and temperature values over the two-wire communication line, and to indicate these values on the individual digital boards by the secondary devices, as a result of which the functionality system capabilities.

Claims (2)

1. USSR author's certificate number 532845, cl. G04 C 3/00, 1975. 2. USSR author's certificate  616608, cl. G 04 C 13/02, 14.02.75 (prototype). e.h. LSH Jui -Ol. e.s. EP -.e -i - + - t CH1-IEL VRWP 7