CN100495921C

CN100495921C - Intelligent digital display time relay

Info

Publication number: CN100495921C
Application number: CNB2006100414233A
Authority: CN
Inventors: 宁晓; 张长友
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2006-09-01
Filing date: 2006-09-01
Publication date: 2009-06-03
Anticipated expiration: 2026-09-01
Also published as: CN101026375A

Abstract

The time relay includes power unit, input unit, control circuit, display unit, actuator, and drive circuit. Using single chip as core, the control circuit constitutes central process unit including following parts: time base parameter memory, memory for time delay setting value, instruction memory, clocking mode tag memory, instruction arbiter, time base counter, tag recognizer, timing counter, and comparator. Contents in the time base parameter memory and tag memory can be input and changed by the input unit at any time. Features are: time base parameter of the digital display time relay can be changed and is not limited, multiple functions, and simple structure.

Description

A kind of intelligent digital display time relay

Technical field

The present invention relates to intelligent digital display time relay.

Background technology

Because the digital display time relay delay adjustments is flexible, the precision height, therefore the timing clear display is widely used in all trades and professions.As on October 19th, 2005 Granted publication, the patent No. be 200420089705.7, name is called the disclosed time relay in " digital display counting, gauge relay " utility model patent, and its basic structure all includes power subsystem, input unit mechanism, control circuit, display unit, actuator and drive circuit thereof.The delay control circuit of this relay has adopted the programmable integrated circuit KJ3618 of a special use, digital display time relay circuit has more in the past had very big simplification, and very big reinforcement has been arranged also on function, basic mode formula and mode of operation selection function when multiple as not only having, counting timing selection function, stop counting after also having counting to arrive or continue two kinds of model selection functions of counting, but still exist defective on some functions, as not carrying out countdown, the time base can only in the scope of limited several fixed values, select, can not be flexible, optionally set, its range of application is restricted.

Summary of the invention

The objective of the invention is to provides a kind of intelligent digital display time relay for overcoming the deficiencies in the prior art, and this relay is not only simple in structure, and with better function.

For achieving the above object, the invention provides a kind of intelligent digital display time relay, it still comprises power subsystem, input unit, control circuit, display unit, actuator and actuator's drive circuit, it is characterized in that: described control circuit is that core constitutes CPU with the single-chip microcomputer, and described CPU is provided with:

The time base parameter memory, be used for storing the time base parameter value of importing from input unit;

Delay adjustments value memory is used for storing the delay adjustments value of importing from input unit;

Instruction storage is used for storing the command information of importing from input unit;

Timing mode sign memory is used to store two kinds of unlike signals, and reverse countdown or two kinds of operating states of countdown are carried out in representative respectively;

The instruction arbiter, the character that is used for the command information of discrimination instruction memory, and make following Action Selection according to differentiating the result: with the delay adjustments value send into the storage of delay adjustments value memory or with the time base parameter value base parameter memory or determine positive countdown sign memory value of statistical indicant when sending into;

Time base counter does to subtract 1 computing until zero by the frequency of setting to time basic initial value wherein;

The landmark identification device is discerned and is made following Action Selection according to recognition result the value of statistical indicant in the timing mode sign memory: timing counter is sent in " 0 " or delay adjustments value;

Timing counter, with the time base parameter regulation frequency do to add 1 or subtract 1 computing;

Comparator with the numerical value in the timing counter and " 0 " or delay adjustments value relatively, and is made the output action signal or is carried out computing next time according to whether the result is identical;

Display Register is used to store information to be displayed;

Display unit shows the content in the Display Register in real time.

Digital display time relay of the present invention is because the plus and minus calculation of timing counter is wherein indicated the decision of memory content, base parameter value decision when the computing frequency is subjected to, and the time base parameter and sign memory content can import at any time and change by input unit, therefore, the time base parameter of this digital display time relay is not only variable, and unrestricted, diverse in function, simultaneously simple in structure.

The invention will be further described below in conjunction with the drawings and specific embodiments.

Description of drawings

Accompanying drawing 1 is a specific embodiment of the invention schematic appearance;

Accompanying drawing 2 is the specific embodiment electrical schematic diagram;

Accompanying drawing 3 reads in for instruction and stores program flow diagram;

Accompanying drawing 4 is the timing program flow chart;

Embodiment

As shown in the figure, the intelligent digital display time relay profile is a rectangle in the concrete enforcement of the present invention, shell 1 is made of plastics, power subsystem, control circuit, actuator and actuator's drive circuit are arranged in the plastic casing 1, input unit, display unit are arranged on the end face, input unit adopts the form of button 2, and control circuit is that core constitutes CPU with the single-chip microcomputer, and CPU is provided with:

Timing counter, with the time base parameter regulation frequency do and add 1 or subtract 1 computing;

Display Register is used to store information to be displayed;

Display unit shows the content in the Display Register in real time.

As shown in Figure 2, power subsystem adopts transformer T1, rectifier diode D1～D4 filter capacitor E1, E2, C1, C2 and three-terminal voltage-stabilizing circuit U 2 are that the mode of the common bridge rectifier three-terminal voltage-stabilizing of MC7805 composition provides dc supply for complete machine, CPU is that core and peripheral memory are formed with single-chip microcomputer U5 (PLC16C57C), can certainly substitute with other similar functions single-chip microcomputers, in the present embodiment except that being provided with timing display, also be provided with delay adjustments value display, delay adjustments value display in the input unit input instruction as command display, timing display and delay adjustments value display are served as by 47 hop count sign indicating number display screens 3 respectively, form drive circuit by amplifying triode P2～P9 and current-limiting resistance R2～R9 and resistance R 14～R21, single-chip data delivery outlet RC0～RC3 meets button SW1～SW4 respectively as input unit, single-chip data delivery outlet RB0～RB7 is connected with current-limiting resistance R14～R21 as the screen data incoming line, single-chip data delivery outlet RA8～RA10 is connected two groups of display units that constitute this relay thus as display screen scan-data line with current-limiting resistance R2～R9 after 3-8 decoding circuit U1 (74HC138) decoding, time base parameter memory in the CPU, delay adjustments value memory, instruction storage, timing mode sign memory and Display Register can be realized by the data memory of inside and outside serial EEPROM data memory U3 (24CO2), and the instruction arbiter, time base counter, the landmark identification device, timing counter and comparator can be realized by plurality of sections software, read in and store shown in the program flow diagram as the instruction among Fig. 3, single-chip microcomputer with the instruction of reading in input unit among the RC0～RC3 of data input port after the internal processes information of at first differentiating this input be function command or set point, if function command just deposits it in the timing mode sign memory, if set point just earlier differentiate be on earth the delay adjustments value or the time base parameter, be stored in respectively then corresponding delay adjustments value memory or the time base parameter memory in, then shown in the timing program flow chart among Fig. 4, respectively the read latch set point and the time base parameter value send in timing timer and the time base counter, after time base counter is whenever finished count cycle, the counting counter just adds 1 or subtract 1, until being added to the delay adjustments value or reducing to " 0 ", the drive circuit of forming via triode P1 from single-chip data output port RA3 output control signal amplifies that to make actuator be relay J 1 action.

Claims

1, a kind of intelligent digital display time relay, comprise power subsystem, input unit, control circuit, display unit, actuator and actuator's drive circuit thereof, it is characterized in that: described control circuit is that core constitutes CPU with the single-chip microcomputer, and described CPU is provided with:

Display Register is used to store information to be displayed;

Display unit shows the content in the Display Register in real time.

2, according to the described intelligent digital display time relay of claim 1, it is characterized in that: display unit comprises delay adjustments value display and timing display.