CN104090506A - Digital input module for adjusting show value of electronic instrument - Google Patents
Digital input module for adjusting show value of electronic instrument Download PDFInfo
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Abstract
The invention belongs to the field of digital input module design and relates to a digital input module for adjusting a show value of an electronic instrument. The digital input module comprises a photoelectric coder (1), a photoelectric sensor module (2), a processor (3) and an interface circuit (4) which are connected in sequence. The photoelectric coder (1) generates optical pulse signals, the photoelectric sensor module (2) is utilized to convert the optical pulse signals generated by the photoelectric coder (1), the processor (3) judges the rotation direction and the rotating speed of the photoelectric coder (1), and operation of addition or subtraction of an indicated value of a display matched with the photoelectric coder (1) is achieved according to the rotation direction of the photoelectric coder (1). A hardware interface of the digital input module is convenient to connect, and few external circuit processor resources are occupied.
Description
Technical field
The invention belongs to digital input module design field, relate to a kind of digital input module of adjusting electronic device displayed value.
Background technology
The data adjustment method of electronic device digital input module mainly contains following several at present:
A layout type for reference computers keypad, numerical digit left and right directionkeys adjustment for conversion, numeral is directly keyed in by keyboard; Have that input panel button is many, numerical digit switch inconvenient, the long-term problem easily losing efficacy of using of button.
The second is the input mode that adopts four direction key, the numerical digit that the adjustment of left and right directions key will change, on or below to key, often press once in current numerical digit and add 1 or subtract 1 operation; Exist input panel button many,, the inefficient problem of input operation.
The third is to utilize right and left key to add rotary encoder to form, and with right and left key, adjusts numerical digit, and scrambler knob turns a step clockwise or counterclockwise, and current number bit digital is carried out and added 1 or subtract 1 operation; Exist numerical digit to switch inconvenient, the long-term problem easily losing efficacy of using of button.
The 4th kind is the scrambler that uses belt switch, press scrambler rotation axis once, numerical digit is counterclockwise advanced one, if current numerical digit adjustment symbol is in display most significant digit, automatically jump to the lowest-order digit of display, press rotation axis, numerical digit continues to change counterclockwise, carries out cycling again, in current numerical digit, scrambler one step that turns clockwise, numerical digit numeral adds 1, otherwise subtracts 1.There is the inefficient problem of input operation.
To sum up, there is the problem that input panel button is many, numerical digit is switched inconvenience, input operation efficiency is low, button easily lost efficacy in the data adjustment method of current electronic device load module, needs to improve.
Summary of the invention
The technical problem to be solved in the present invention is that the input panel button of existing electronic device digital input module is many, numerical digit is switched inconvenient problem.
The invention provides a kind of digital input module of adjusting electronic device displayed value, this digital input module is simple in structure, very easy to use.
Digital input module of the present invention comprises successively along the photoelectric code disk, photoelectric sensor assembly, processor and the interface circuit that connect; Wherein,
The light pulse signal that photoelectric sensor assembly produces photoelectric code disk converts electric impulse signal to processor;
Rotation direction and the rotating speed of processor photoelectric code disk in the judgement unit interval according to the electric impulse signal receiving and phase place, produce three kinds of output signals:
According to the rotation direction of photoelectric code disk, produce add-subtract control signal;
The light pulse signal number that in unit interval, photoelectric code disk produces falls between different pulse area, on different carry-out bits, produces counting pulse signal;
In the Yi Ge digit time, produce effective counting pulse signal, produce look-at-me;
Interface circuit is according to receiving output signal, and the driving chip by interface circuit inside carries out numeral adjustment to the instrument display connecting:
When adding count signal, become suddenly to subtract count signal or subtract count signal and become suddenly and add count signal,, photoelectric code disk rotation direction changes, and now, the impulse meter zero clearing in module, starts the step-by-step counting of new direction;
The counting pulse signal of module output is dispensed in each numerical digit of instrument display, the numeral in specific digits is carried out and added 1 or subtract 1 operation;
Look-at-me is interrupted instrument display current operation, receives the numeral input of digital input module, changes the digital indicated value in an instrument display numerical digit.
Further, described photoelectric code disk is photoelectricity delta pulse code-disc, photoelectricity delta pulse code-disc output A, B two-phase orthogonal optical pulse signal.
The light pulse signal that the present invention produces according to photoelectric code disk by processor, rotation direction and the rotating speed of judgement photoelectric code disk, thereby realize the numeral adjustment of instrument display, than prior art, structure of the present invention greatly reduces, utilize device seldom, can solve the technical matters that existing labyrinth is realized.
Accompanying drawing explanation
Fig. 1 is the frame diagram of digital input module of the present invention;
The process flow diagram that data adjustment is carried out in this utilization of Fig. 2 invention
The outer package figure of Fig. 3 digital input module of the present invention;
Fig. 4 is the cut-away view of digital input module of the present invention;
Fig. 5 is the side view of the cut-away view of digital input module of the present invention;
Fig. 6 is the sequential chart of the photoelectric sensor assembly output electric pulse signal of digital input module of the present invention;
Fig. 7 is the applicating example schematic diagram of digital input module of the present invention;
Fig. 8 is the main program block diagram of digital input module of the present invention;
Fig. 9 is the interrupt service routine block diagram of single-chip microcomputer input port of the present invention;
Figure 10 is single-chip microcomputer 500ms Interruption service routine block diagram of the present invention;
Applicating example interrupt service routine block diagram when Figure 11 interrupts for processing digital input module of the present invention;
Figure 12 is the addition subroutine block diagram of applicating example;
Figure 13 is the subtraction subroutine block diagram of applicating example.
1-photoelectric code disk, 2-photoelectric sensor assembly, 3-processor, 4-interface circuit, 5-instrument display, the rotating shaft of 6-module, 7-wiring board, 8-shell.
Embodiment
One, structure of the present invention
With reference to figure 1, Fig. 2, a kind of digital input module of adjusting electronic device displayed value, comprises successively along the photoelectric code disk 1, photoelectric sensor assembly 2, processor 3 and the interface circuit 4 that connect;
Photoelectric code disk 1 produces light pulse signal; The light pulse signal that photoelectric sensor assembly 2 produces photoelectric code disk 1 converts the electric impulse signal that meets processor 3 needs to;
Rotation direction and the rotating speed of processor 3 photoelectric code disk in the judgement unit interval according to the electric impulse signal receiving and phase place, produce output signal, and output signal has three types:
The first is add-subtract control signal, according to the rotation direction of photoelectric code disk 1, produces different add-subtract control signals: when photoelectric code disk 1 clockwise rotates, produce and add count signal, when photoelectric code disk 1 rotates counterclockwise, produce and subtract count signal;
The second is counting pulse signal, and the rotating speed of photoelectric code disk 1 is different, and the light pulse signal number that in the unit interval, photoelectric code disk 1 produces falls between different pulse area, produces different counting pulse signals;
The third is look-at-me, produces effective counting pulse signal and produce look-at-me in the Yi Ge digit time;
Interface circuit 4 is according to receiving output signal, and the driving chip by interface circuit 4 inside carries out numeral adjustment to the instrument display 5 connecting:
Add count signal instrument display 5 specific digits are carried out and added counting, subtract count signal instrument display 5 specific digits are carried out and subtracted counting;
When adding count signal, become suddenly to subtract count signal or subtract count signal and become suddenly and add count signal, illustrate that photoelectric code disk 1 rotation direction changes, now, the impulse meter zero clearing in module, starts the step-by-step counting of new direction;
Counting pulse signal is carried out and is added 1 or subtract 1 operation numeral in its corresponding instrument display 5 specific digits;
Look-at-me is interrupted instrument display 5 current operations, receives the numeral input of digital input module, changes the digital indicated value in instrument display 5 certain numerical digit one time.
Further, with reference to figure 3, Fig. 4 and Fig. 5, photoelectric code disk 1 is rotatably connected in module rotating shaft 6 by the knob of photoelectric code disk 1 inside, when module rotating shaft 6 is rotated, relies on the penetrating and shading light characteristics of signals of photoelectric code disk 1 to produce light pulse signal;
Photoelectric code disk 1 is in harmony into the gap to a photoelectric sensor assembly 2, and photoelectric sensor assembly 2 and processor 3, interface circuit 4 are welded on a wiring board 7;
Interface circuit 4, by output cable external equipment display, is realized the adjustment of instrument display 5 numerals;
With a shell 8 by the fastening encapsulation of above-mentioned each components and parts.
In Fig. 5, can find out, module rotating shaft 6 is independent, and photoelectric sensor assembly 2 is contactless.It is flexible, easy to operate that thereby module rotating shaft 6 is rotated, and little, the long service life of wearing and tearing.
Two, lower mask body is set forth the numeral adjustment principle of digital input module.
Photoelectric code disk 1 of the present invention is selected photoelectricity delta pulse code-disc (hereinafter to be referred as code-disc), the resolution of photoelectricity delta pulse code-disc is 600P/r (pulse often turns), photoelectricity delta pulse code-disc output A, B two-phase orthogonal optical pulse signal (hereinafter to be referred as pulse); Processor 3 is single-chip microcomputer.
The normality signal of count pulse output line is high level pulse, and useful signal is negative pulse, and pulse width is 200ms; Interrupting application signal normality is high level, has while interruption to export negative pulse, and pulse width is 10ms.
The output interface of module is totally 18 cables, 1 power lead that is digital input module, and 1 is common ground, 1 is housing shroud line; 1 is root increasing/cut signal line, and 1 is look-at-me line, and 13 is signal wire, i.e. count pulse output line.
Associative list 1, single-chip microcomputer be take 500ms and the pulse of photoelectricity delta pulse code-disc output is counted as chronomere, if photoelectricity delta pulse code-disc rotation direction changes in counting process, from changing that time, automatically give up original count value, restart counting.It is interval steps that digital input module be take 50 pulses, and when 10 of 500ms inside counting umber of pulse (P) less thaies, processor does not respond, and instrument display is unchanged; Photoelectricity delta pulse code-disc turns clockwise in 500ms, count pulse number (P) is during more than 10 pulses, the interval that processor falls into according to pulse number, in pulsewidth 200ms counting negative pulse of corresponding signal wire output, look-at-me line produces a 10ms negative pulse look-at-me simultaneously, increasing/cut signal line output high level, thus the execution of the numerical value of instrument display adds 1 counting.If be rotated counterclockwise photoelectricity delta pulse code-disc in 500ms, when reaching effective impulse and counting, and at corresponding signal wire, produce the counting negative pulse of pulsewidth 200ms, and look-at-me line produces a 10ms negative pulse look-at-me, and the numerical value of instrument display is carried out and is subtracted 1 counting.
The relation of each signal wire output pulse and code-disc velocity of rotation is as shown in table 1.
Table 1 each signal wire output pulse and photoelectricity delta pulse code-disc velocity of rotation relation
Because photoelectricity delta pulse code-disc revolves, turn around, the umber of pulse of generation is 600, when P > 600, represents that the rotation of photoelectricity delta pulse code-disc was over one week.The time interval step-length of digital input module simultaneously, and signal wire corresponding to number of respectively exporting pulse in the unit interval be all artificial regulation, can change according to actual conditions.
Be further explained below:
For example instrument display need show four figures value, and the frequency that numerical digit changes is followed successively by ten, hundred, kilobit, individual position.The most frequent because of tens operation, 3,4,5,6,7 five signal wires can be connected together.As long as photoelectricity delta pulse code-disc rotational speed can fall between the pulse area of 101 to 350 pulses the umber of pulse producing in the 500ms time, ten digit value is carried out and is added 1 or subtract 1 operation, and 250 pulses of digital input module output have been used in this interval.8,9,10,11 4 signal wires are connected together, as long as photoelectricity delta pulse code-disc rotational speed can fall between the pulse area of 351 to 550 pulses the umber of pulse producing in the 500ms time, hundred bit value are carried out and to be added 1 or subtract 1 operation, and 200 pulses of digital input module output have been used in hundred intervals.12,13 signal wires are connected together, as long as when the umber of pulse that photoelectricity delta pulse code-disc rotational speed makes to produce in the 500ms time is greater than 550 pulses, kilobit numerical value is carried out and is added 1 or subtract 1 operation.1,2 signal wires are connected together, as long as photoelectricity delta pulse code-disc rotational speed can fall between the pulse area of 11 to 100 pulses the umber of pulse producing in the 500ms time, units value is carried out and is added 1 or subtract 1 operation.Wherein, corresponding certain the figure place position of which root signal wire, can adjust and stipulate according to actual conditions, is not limited to regulation described above, and example described above is a more conventional embodiment.
Output signal is sent with " OC " door output hex inverter, thereby digital input module of the present invention is applicable to the external circuits of various supply voltages.
Due to digital input module, take 500ms and photoelectric code disk is counted as chronomere, it is low that instrument display numerical digit changes speed, and numerical digit numerical values recited only increased or reduced " 2 " p.s..Can saltus step, safe and reliable.
As shown in Figure 6, photoelectricity delta pulse code-disc rotates a circle, and A, B two-phase respectively produce 600 pulses.When clockwise rotating, the first half that waveform is Fig. 6; At the rising edge of A sequence, B sequence is high level, leading A sequence 90 degree of B sequence.When rotating counterclockwise, the latter half that waveform is Fig. 6; At the rising edge of A sequence, B sequence is in low level.According to this rule, can judge that photoelectricity delta pulse code-disc clockwise rotates or rotates counterclockwise.
With reference to figure 7, the instrument display of external circuits is totally three figure places.If this instrument display needs the frequent ten digit value that regulates, the probability that hundred bit value and units value regulate is less.During dispense-pulse, ten digit value is distributed at most, totally 300 pulses; Units value is totally 190 pulses.Signal wire is assigned as units value and uses (totally 4 of 1-4 signal wires, 4 * 50=200 pulse, disturbing pulse while deducting 10 anti-module shaft vibration, totally 190 of effective impulses), in 500ms, photoelectricity delta pulse code-disc rotating speed is more than 10 pulses and while being less than 201 pulses, and low level numerical value adds 1 or subtract 1; Ten digit value is used 5-10 line (totally 6,6 * 50=300 pulse), and in 500ms, photoelectricity delta pulse code-disc rotating speed is more than 200 pulses and while being less than 501 pulses, and ten digit value adds 1 or subtract 1; Hundred bit value are used 11-13 lines, and when in 500ms, the rotating speed of delta pulse code-disc is only greater than 500 pulses, hundred bit value add 1 or subtract 1.The connected mode of each signal wire as shown in Figure 7.The 14th line is the look-at-me line of digital input module output, and the Interruption signal that output module sends interrupts laggard line number word and shows adjusting operation.The 15th line is increasing/cut signal line, for instrument display digital addition and subtraction, regulates and uses.The 16th line is the power lead of digital input module power supply, and the voltage of the normal work of digital input module internal circuit is provided.The 17th line is common ground.
For convenience of narration, below with " module " replacements " digital input module ", units value is called for short low level, ten digit value is called for short meta, hundred bit value are called for short high positions.
Below in conjunction with accompanying drawing, provide the referral procedure block diagram of more conventional application program, wherein single-chip microcomputer model is Atmega8L-8AI, have five kinds of park modes, be respectively idle (Idle), ADC noise reduction (ADC Noise Reduction), power down (Power-down), power saving (Power-save), wait for (Standby).With reference to figure 8, because functions of modules is single, single-chip microcomputer is often in idle condition, and program adopts " power down park mode ".System boot or reset after, master routine starts, system and processor port and internal register initialization start the watchdog function of anti-system crash, reset WatchDog Timer.Open interruption, processor starts response external look-at-me, and system enters power down park mode, waits for that code-disc A train pulse arrives.
When idle, house dog is per second wakes CPU up once, and master routine is restarted one time.During normal work, because 500ms repeatedly carries out " house dog counter O reset instruction (WDR) " in the time, make house dog not affect the normal operation of system program.The application of autoboot method when master routine free time or program exception, never crashes when module hardware is normally worked, and has improved reliability of the present invention.
With reference to figure 9, after the rising edge of single-chip microcomputer A train pulse in Fig. 6 triggers, system enters interrupt mode, carries out port interrupt service routine.First close and interrupt, forbid other interrupt source work, single-chip microcomputer stops response external look-at-me, and defence program breakpoint, keeps the scene intact; House dog counter O reset, forbids house dog action.In Fig. 6, the rising edge of A sequence is sentenced " B sequence level ", as is " 1 ", i.e. high level, and code-disc turns clockwise, program redirect S1.If " B sequence level " is " 0 ", i.e. low level, code-disc is rotated counterclockwise, and turns S2.
S1: " adding count flag " of judgement single-chip microcomputer inner setting, as illustrated that code-disc continues to turn clockwise, redirect S3 for " 1 ".Otherwise illustrate that code-disc has just started to turn clockwise, redirect S6.
S2: " subtracting count flag " of judgement single-chip microcomputer inner setting, as illustrated that code-disc continues to be rotated counterclockwise, redirect S3 for " 1 "." otherwise subtracting count flag is 0 ", illustrates that code-disc has just started to be rotated counterclockwise, redirect S4.
S3: " port pulse (the being code-disc electric pulse) counter " that arrange in single-chip microcomputer adds " 1 ", interrupt service routine is carried out " restoring scene, recovery breakpoint " operation, open interruption, single-chip microcomputer starts response external look-at-me, and this break in service is finished.
S4: program is " subtracting count flag " set of single-chip microcomputer inner setting, simultaneously by single-chip microcomputer inner setting " adding count flag " " 0 " clearly, program redirect S5.
S5: " port pulse (the being code-disc electric pulse) counter " zero clearing arranging in single-chip microcomputer, " 500ms timer initialize also starts " arranging in single-chip microcomputer, program redirect S3.
S6: program is " adding count flag " set of single-chip microcomputer inner setting, simultaneously by single-chip microcomputer inner setting " subtracting count flag " " 0 " clearly, program redirect S5.
Figure 10 is single-chip microcomputer 500ms Interruption service routine block diagram, and its effect is the velocity of rotation that detects photoelectricity delta pulse code-disc, and testing result is embodied on the signal wire of module output, by interrupt mode, is connected with the external circuits of this module of application.
When 500ms timing then, program is carried out " Interruption service routine ".First close and interrupt, forbid other interrupt source work, defence program breakpoint, keeps the scene intact; House dog counter O reset, forbids house dog action.If inner " port pulse (the being code-disc electric pulse) counter " numerical value arranging of single-chip microcomputer is less than 10, module is thought undesired signal, and program is directly carried out S12.Otherwise, " adding count flag " of judgement single-chip microcomputer inner setting, as be " 1 " redirect S8; Otherwise redirect S7.
S7: " subtracting count flag " of judgement single-chip microcomputer inner setting, as be " 1 " redirect S9; Otherwise redirect S10.
S8: " increasing/down control line " signal level in set module output cable, redirect S11.
S9: drag down " increasing/down control line " signal level in module output cable, redirect S11.
S10: in the specification module 500ms time in the past, the inner memory data of attonity or single-chip microcomputer is disorderly, and module master routine automatically resets and restarts, and guarantees that module is all the time in normal operating conditions.This measure can make module in the situation that of code-disc attonity, automatically resets for 1 second 2 times.Be in rugged surroundings work, also can accomplish that module self never crashes.
S11: inner " port pulse (the being code-disc electric pulse) counter " arranging of single-chip microcomputer is divided by 50 rear round numbers and add 1, obtains the signal wire sequence number that need to send 200ms negative pulse in module output cable; On the signal wire calculating, produce the negative pulse of a 200ms width, and on the look-at-me line in module output cable, send the look-at-me of 20ms, carry out S12.
S12: inner " port pulse (being code-disc electric pulse) counter " " 0 " clearly arranging of single-chip microcomputer, " adding count flag " of single-chip microcomputer inner setting, be " 0 " clearly, and " subtracting count flag " of while single-chip microcomputer inner setting be clear " 0 " also; Interrupt service routine is carried out " restoring scene, recovery breakpoint " operation, opens interruption, and single-chip microcomputer starts response external look-at-me, and this Interruption service execution is complete.
Referral procedure block diagram when further Figure 11, Figure 12, Figure 13 are this module of instrument integration, reference during for this digital input module research and development instrument.
Interrupt service routine block diagram when Figure 11 interrupts for processing this module, has no progeny in " external circuits " respond module, the processing mode to module output signal.In figure, when low level and meta signal are all in invalid situation, program continues judgement high signal state, and does not directly carry out high operation, has improved the reliability of look-at-me.
Figure 12 is addition subroutine block diagram, can realize carry adjustment, low level meter full after from the high carry of the more own numerical digit of trend, realize high-order fine adjustment function.
Figure 13 is subtraction subroutine block diagram, when low level reduces to 0, does not affect the position that numerical digit is high.When a high position has been that 0 execution is while subtracting 1 operation, automatically by this low all zero clearing of all numerical digits, the very convenient input operation of carrying out setting.For example need all zero clearings of demonstration numeral current on instrument display, only, with rotating counterclockwise module rotating shaft at a high speed, moment can complete.
The present invention produces light pulse signal according to photoelectric code disk 1, the light pulse signal that utilizes 2 pairs of photoelectric code disks of photoelectric sensor assembly 1 to produce is processed, processor judgement photoelectric code disk 1 rotation direction and rotating speed, the direction of rotating according to photoelectric code disk 1, realize the operation that adds deduct of external equipment display, according to the rotating speed of photoelectric code disk 1 rotation direction, realized the adjustment of external equipment display numeral, very simple and practical of structure, is beneficial to spread and uses.
Above-described specific descriptions; object of the present invention, technical scheme and beneficial effect are had been described in detail; institute is understood that; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; all within spirit of the present invention and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. a digital input module of adjusting electronic device displayed value, is characterized in that, module comprises successively along the photoelectric code disk (1), photoelectric sensor assembly (2), processor (3) and the interface circuit (4) that connect; Wherein,
The light pulse signal that photoelectric sensor assembly (2) produces photoelectric code disk (1) converts electric impulse signal to processor (3);
Rotation direction and the rotating speed of processor photoelectric code disk (1) in the judgement unit interval according to the electric impulse signal receiving and phase place, produce three kinds of output signals:
According to the rotation direction of photoelectric code disk (1), produce add-subtract control signal;
The light pulse signal number that in unit interval, photoelectric code disk (1) produces falls between different pulse area, on different carry-out bits, produces counting pulse signal;
In the Yi Ge digit time, produce effective counting pulse signal, produce look-at-me;
Interface circuit (4), according to receiving output signal, carries out numeral by the inner driving chip of interface circuit (4) to the instrument display (5) connecting and adjusts:
Photoelectric code disk (1) rotation direction changes, and now, the impulse meter zero clearing in module, starts the step-by-step counting of new direction;
The counting pulse signal of digital input module output is dispensed in each numerical digit of instrument display (5), the numeral in specific digits is carried out and added 1 or subtract 1 operation;
Look-at-me is interrupted instrument display (5) current operation, receives the numeral input of digital input module, changes the digital indicated value in certain numerical digit of an instrument display (5).
2. digital input module as claimed in claim 1, is characterized in that, described photoelectric code disk (1) is photoelectricity delta pulse code-disc, photoelectricity delta pulse code-disc output A, B two-phase orthogonal optical pulse signal.
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| CN104090506B (en) | 2017-03-15 |
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