CN1086234C - Universal monitor apparatus for quality control by using control diagram principle - Google Patents
Universal monitor apparatus for quality control by using control diagram principle Download PDFInfo
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- CN1086234C CN1086234C CN 97106547 CN97106547A CN1086234C CN 1086234 C CN1086234 C CN 1086234C CN 97106547 CN97106547 CN 97106547 CN 97106547 A CN97106547 A CN 97106547A CN 1086234 C CN1086234 C CN 1086234C
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Abstract
The present invention relates to a universal monitoring apparatus for quality control by a control diagram principle, which is successively composed of a multi-way sensor, a transducer of standard signals adaptive to the multi-way sensor, a model/digit converter, a single chip computer, a multi-way alarm circuit, a keyboard, a digital pipe and a printer interface. All calculation, comparison discrimination and control to each part of hardware of the present invention are determined by software, and the types of monitored targets and application control pictures can be conveniently changed to attain the purpose of universality and flexibility. The present invention is suitable for the manual operation of small and medium sized flow-performance production enterprises, or the automatic adjustment of production parameters and monitoring implementation in an open-loop method, and is also suitable for the automatic adjustment and the monitoring of large sized flow-performance production enterprises in a closed-loop method to make the enterprises stably produce qualified products.
Description
The present invention relates to a kind of intelligent instrumentation designing technique that is used for industrial product quality control usefulness, particularly a kind of universal monitor apparatus (device) of in quality control, using Xiu Hate (Shewhart) metering (or counting) control chart principle design, can be widely used in that (as oil, chemical industry, light industry etc.) carry out control and management to guaranteeing constant product quality on the various procedural style production lines, and effective reliable means is provided.
Since the eighties, fierce unusually because of competition in the international market, industrially developed country all classifies statistical Process Control (SPC) one of as hi-tech now.So-called.Statistical Process Control " mainly be that application controls figure (comprises average (x)～extreme difference (R) control chart, average (x)～standard deviation (S) control chart, median
～extreme difference (R) control chart, monodrome (X)～moving range (Rs) control chart, percent defective (P) control chart, defects per unit (λ) control chart etc.) (procedural style production) process is carried out control and management, the information that then is used for obtaining procedure quality of looking into is picked up in sampling.Because modern society requires high-caliber quality assurance, in industrially developed country, more and more exhaustive tests or automatic inspection systems of adopting, the application of sampling check reduces relatively, to utilize control chart to carry out control and management apparent more important thereby make.At present, quality control chart has obtained to use widely, has once investigated the situation that 115 tame Japanese factories use control charts as Japan Nagoya polytechnical university, and factory of the average every family of result uses 137 control charts.Colour film department of Kodak has worker 5000 people, has adopted 35000 control charts, 7 per capita.Can lie, what of application controls figure number have been reflected the height of factory, enterprise's level of scientific management in some sense.Control chart can play following effect: 1, implement the principle of putting prevention first, prevent trouble before it happens; 2, reduce waste product and do over again, reduce cost, thereby boost productivity: 3, prevent unnecessary (production technology) process adjustment, avoid the process deterioration, 4, the information of relevant process capability etc. is provided.But the control chart control of quality will be by sampling, measure, calculate, the stages such as mapping be got ready, judgement, operates complicated trouble, can not in time reflect problem especially on flow process production and high-speed production lines, and has gone out a lot of waste products during to discovery.Therefore, in many industry quality managements,, cause a lot of enterprises not make control chart or become a mere formality or play by ear inspection because of disliking trouble and reacting insensitive.And in the actual production, it also is inconvenient that enterprise will specify some experienced personnel to carry out numerous and diverse control chart operation for a long time.
The objective of the invention is to overcome above-mentioned deficiency, thereby a kind of universal monitor apparatus that comprises that control chart principles such as application average～extreme difference are carried out quality control is provided, make it to become a kind of can conveniently the application.Stop Hart " smart instrumentation (device) of control chart principle observation process state.It can be widely for the intelligent automation of various conventional production lines, for improving and stabilized product quality provides control device effectively reliably.
The objective of the invention is to realize: because Modern High-Tech is one of feature with soft, combining closely of hardware mostly with following technical scheme, foundation of the present invention is to utilize the quality control chart principle, with required whole (sampling) calculate, relatively, mapping gets ready, discriminant alarm and to the control compiled program (software) of hardware each several part, operation is all by the software decision, and the hardware of combining closely carries out overall process continuous monitoring control to quality.For this reason, the invention is characterized in that this instrument is successively by multiple sensor (circuit), respectively with the standard signal transducer (circuit) of the adaptive same multichannel of these (multichannel) sensors, mould/number (A/D) converter (circuit), single-chip microcomputer (constituting) by microprocessor CPU, multiple alarm circuit and keyboard, charactron, printer interface is formed, wherein multiple sensor (for example the having 8 tunnel) electric signal that the procedure parameter that monitored object provides as sample signal can be become after testing difference (level) flows to (standard signal) transducer, the dc signal of the varying level that (standard signal) transducer (being made of droop amplifier) can detect multiple sensor outputs to mould/number (A/D) converter after being transformed to the fiduciary level simulating signal again, modulus (A/D) converter is transformed to this standard analog signal digital signal again and is transported in the single-chip microcomputer of microprocessor (CPU) formation, microprocessor (CPU) can be carried out whole programs, sampled signal to aforementioned input carries out sample packet, computation of mean values, extreme difference and control limit thereof, calculate variance etc., calculating behind operator's input (utilizing the keyboard input) predetermined tolerance can be by the process capability index (C of charactron demonstration
P) value, at process capability index (C
P) under the value situation about meeting the demands, change control over to control chart program monitoring process unstability whether, automatically the new sample signal of input carries out stable state and differential mode analysis and finishes the work of control with control chart under this control limit, sends alerting signal for the multiple alarm circuit output alarm signal occurring when unusual again.
Below in conjunction with embodiment particular circuit configurations of the present invention and principle of work are described in further detail.
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is a kind of circuit theory diagrams of universal monitor apparatus of the present invention.
Fig. 3 is applied in the operating control procedure block diagram that uses on the monitor of the present invention (comprise and analyzing with the process flow diagram of part and the control process flow diagram with part that among the figure: y-refers to satisfied, refer to be unsatisfied with by, N-, by).
With reference to accompanying drawing, the present invention also can have following technical characterictic in the specific design manufacture process:
One, described multiple alarm circuit can also can be furnished with mini-printer access printer interface and be realized printing (getting ready) taking of evidence to carry out alarm logging continuously by the fluorescent bubble (signal lamp) that sends sound, visual alarm and hummer or electric bell formation.
Two, can be equipped with an octal latch (available 74LS373) in described mould/number (A/D) conversion (device) circuit and use, form the hummer of each sound light alarming circuit and fluorescent (lamp) and steep and be used for process capability index (C as expanding
P) be furnished with an adaptive driver all separately on the charactron that shows of value, output signal delivers to respectively after octal latch (74LS373) latchs that printer is got ready and through luminous indication of driver drives fluorescent bulbs and hummer sounding alarm.
Three, also be equipped with phase inverter (available 74LS04), code translator (available 74LS138) and one or (OR) and one in described mould/number (A/D) converter (or claim transducer) circuit and import the buffer circuit of data in order to avoid step-out with composition microprocessor (CPU) with door (AND).
Four, can add a programmable controller (programmable interface 8155) on central authorities (little) processors (CPU) as single-chip microcomputer to expand the I/O mouth of microprocessor (CPU), expand the function of microprocessor (CPU), nonencoded keyboard and charactron connect the row position of six phase inverters (74LS06) with the identification keyboard with programmable interface (8155), with the row position of 29～36 identification keyboards of the contact in the programmable interface (8155), send into microprocessor (CPU can use 8031 types) keyboard input signal is discerned.
Five, can there be ROM (read-only memory) (ROM) single-chip microcomputer inside with stored programme and constant, random access memory (RAM) is arranged in order to the storage data.The program Solidification that designs is in ROM (read-only memory) (ROM), send the various instructions that comprise the input and output requirement with control computer, calculating, interruption, judgement, acceptor are finished in the instruction of single-chip microcomputer follow procedure---the instruction and data of machine dialogue, output respectively again after its inter-process.
With reference to the circuit theory diagrams of accompanying drawing 2 as can be known, when specific design, this monitor (device) can be by microprocessor (CPU model 8031), programmable interface (8155), ROM (read-only memory) (2764), random access memory (6264), 3～8 road drivers (74LS244), six phase inverters (74LS04 and 74LS06), 2～No. 4 code translators (74LS139), 3～No. 8 code translators (74LS138), display driver (CJ0498), eight successive approximation A/D converters (A/DC0809), eight line drives (7406), octal latch (74LS373), charactron (LTS547GF), printer socket (MP-16J), hummer (PB2130), nonencoded keyboard, fluorescent instruction foam and one or (OR) and one and door (AND) composition.Because microprocessor (8031) will rely on exterior storage, and four parallel input/output port are arranged itself, wherein two are used to connect ROM (read-only memory) (2764) (depositing program and constant) and random access memory (6264) (deposit data).This device installing programmable interface (8155) (or claiming programmable controller) is to expand the I/O mouth.Nonencoded keyboard and charactron (only use once in this keyboard and this process of charactron, available interruptive command uses separately) connect the row position that six phase inverters (74LS06) discern keyboard with the row position of identification keyboard and the contact 29～36 in the programmable interface (8155) (this device with four) with programmable interface (8155) and send into microprocessor (8031), keyboard is discerned.3～8 road drivers (74LS244) are in order to certain the several dot-dash in eight dot-dash that drive charactron, and the row position of keyboard then indicates that charactron to light.The data of input and output all are latched in the latch (74LS373) in case loss of data, and decision output or input, and 2～No. 4 code translators (74LS139) are operation ROM (read-only memory) (2764) or random access memory (6264) in order to identification.
Tested analog quantity is by various sensor input (can be made of No. eight sensors), converts standard analog signal input modulus (A/D) converter (ADC0809) to the transducer of different size and makes analog-to-digital conversion process.Though existing ternary latch in the analog to digital converter (ADC0809) but this device adds an octal latch (74LS373) in addition uses as expanding, phase inverter (74LS04) and code translator (74LS138) and one or (OR) and one and (AND) composition control import data buffer circuit in order to avoid step-out.Output signal outputs to printer and drives the fluorescent bubble through driver (CJ0498) after latch (74LS373) latchs makes printing, luminous index simultaneously, and hummer then is that independent line output drives sounding by eight line drives (7406).This instrument is used DC5V (5 volts of direct currents) jointly, and printer then has plug in addition.18,19 at microprocessor (8031CPU) also are connected to quartz (controlled) oscillator with unified frequency.
With reference to accompanying drawing, the process of manipulating of this monitor following (referring to be used for average～range chart): sampled signal is taken out through amplifier (transducer) by sensor and does to be transported to A/D converter after standard signal is handled, by microprocessor (CPU) control sampling, sampling mode is stipulated by the user, enters this instrumental analysis by time sequence input and uses partly.Back output sample population mean, extreme difference mean value, root-mean-square deviation, mean value control limit, extreme difference control are limit as calculated.Wait for that then the user imports (technology) tolerance parameter, instrument is promised out process Capability index (C
P) value.If the user is to process capability index (C
P) value is dissatisfied, should regulate parameter voluntarily and repeat said process meet the demands to process capability till, with the mean value of analysis and Control, extreme difference control being limit to be fixed up and changing the control of normal monitoring over to.Change control then over to and continue to input or output signal with part.Signal is divided into groups to calculate by instrument automatically, as exists abnormality promptly to point out the situation that has abnormality of mean value and extreme difference respectively with signal lamp (charactron).Annotate: the differential mode decision method in Shewhart control chart: a, X, R single-point transfinite; B, continuous 3. at least 2 drop in 2/3 control limit; C, continuous 7. at least 3 o'clock are in 2/3 control limit (X, R); D, continuous 7 the same sides at center line; E, continuous 7 trend chains (X, R); Among the f, continuous ten one 10 in center line one side (X); G, continuous ten four have ten two concentrated center line one sides (X, R) at least; H. continuous ten seven sides that have at center line at least at ten four; I, continuous 20 sides that have at center line at least at ten six.As exist unsteady state promptly to alarm respectively with signal lamp and hummer.The user can adjust each procedure parameter and repeat above process till recovering stable state.Under normal monitoring control, constantly carry out the monitoring of stable state and differential mode by the sampling period that the user sets up.If any improper situation, instrument will be automatically with signal lamp or buzzer warning.Need write down then at this instrument output interface as the user and to insert the printer prints record, carry out alarm logging continuously.
In sum, the present invention utilizes the automatic control of computer realization to replace the manual operations (not being seen in the domestic and foreign literature report as yet) of prior art according to the control chart principle.Instrument of the present invention is promptly carried out whole programs after starting, and finishes analysis and Control figure process, as the omnidistance preface first half (Fig. 3 is seen in the cyclic process before last the interruption); The control control chart, the Lower Half (Fig. 3 is seen in the cyclic process behind the last point of interruption) as omnidistance preface realizes continuous monitoring.Up to makeover process parameter again (when the variation of product working medium, technique change, discovery great when not normal etc.) implement new overall process again.Whole calculating of the present invention, comparison, differentiation and the control of hardware each several part all determined by software; Change software (program) and just can change the target of monitoring and the classification of application controls figure (aforesaid various control charts), reach general, purpose flexibly.The present invention is applicable to the manual operations of medium and small flow process manufacturing enterprise or with the automatic adjusting of open-loop method, instructs it to regulate manufacturing parameter and implements monitoring; Be applicable to that also large-scale flow process manufacturing enterprise closed-loop policy regulates adjusting down the not monitoring of inefficacy is arranged, make it can reach the quality requirements of regulation and stably produce specification product.
Claims (6)
1, the universal monitor apparatus that a kind of application controls figure principle is carried out quality control, it is characterized in that this instrument is successively by multiple sensor, adaptive with multiple sensor respectively standard signal transducer, mould/number (A/D) converter, single-chip microcomputer, multiple alarm circuit and keyboard, charactron, printer interface is formed, wherein multiple sensor can become the procedure parameter that monitored object provides as sample signal after testing different electric signal and flows to the standard signal transducer, the standard signal transducer that is made of droop amplifier outputs to mould/number (A/D) converter after the dc signal of the varying level that detected by multiple sensor can being transformed to the fiduciary level simulating signal again, modulus (A/D) converter is transformed to this standard analog signal digital signal again and is transported in the single-chip microcomputer of microprocessor (CPU) formation, microprocessor (CPU) can be carried out whole programs, sampled signal to aforementioned input carries out sample packet, computation of mean values, extreme difference and control limit thereof, calculate variance, can calculate the process capability index (C that shows by charactron after utilizing the man-machine conversation predetermined tolerance
P) value, at process capability index (C
P) change control under the value situation about meeting the demands over to control chart program monitoring process unstability whether, under this control limit, import new sample signal automatically, carry out stable state and differential mode analysis and finish the work of control with control chart, output alarm signal is given the multiple alarm circuit alarm again when appearance is unusual.
2, universal monitor apparatus according to claim 1, it is characterized in that the multiple alarm circuit can constitute by sending sound, the fluorescent bubble of visual alarm and hummer or electric bell, also can be furnished with mini-printer and insert printer interface realization print record evidence, to carry out alarm logging continuously.
3, universal monitor apparatus according to claim 1, it is characterized in that to be equipped with in described mould/number (A/D) converter circuit an octal latch and use, form the hummer and the fluorescent bubble of each sound light alarming circuit and be used for process capability index (C as expanding
P) be furnished with an adaptive driver all separately on the charactron that shows of value, output signal delivers to after octal latch latchs that printer is got ready and steep luminous indication and hummer sounding alarm through the driver drives fluorescent.
4, according to claim 1 or 3 described universal monitor apparatus, it is characterized in that also being equipped with in described mould/number (A/D) converter circuit phase inverter, code translator and one or (OR) and one and door (AND) with the buffer circuit of forming microprocessor (CPU) input data in order to avoid step-out.
5, the described universal monitor apparatus of root a tree name claim 1, it is characterized in that can adding a programmable controller on central authorities (little) processors (CPU) as single-chip microcomputer: promptly programmable interface (8155) is to expand the I/O mouth of microprocessor (CPU), nonencoded keyboard and charactron connect the row position of phase inverter with the identification keyboard with programmable interface (8155), with the row position of 29～36 identification keyboards of the contact in the programmable interface (8155), send into microprocessor (CPU) keyboard input signal is discerned.
6, universal monitor apparatus according to claim 1 or 5, it is characterized in that single-chip microcomputer inside is provided with ROM (read-only memory) (ROM) with stored programme and constant, random access memory (RAM) is arranged in order to the storage data, the program Solidification that designs is in ROM (read-only memory) (ROM), send the various instructions that comprise the input and output requirement with control computer, calculating, interruption, judgement, acceptor are finished in the instruction of single-chip microcomputer follow procedure---the instruction of machine dialogue, output respectively again after its inter-process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97106547 CN1086234C (en) | 1997-07-29 | 1997-07-29 | Universal monitor apparatus for quality control by using control diagram principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97106547 CN1086234C (en) | 1997-07-29 | 1997-07-29 | Universal monitor apparatus for quality control by using control diagram principle |
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| CN1206862A CN1206862A (en) | 1999-02-03 |
| CN1086234C true CN1086234C (en) | 2002-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 97106547 Expired - Fee Related CN1086234C (en) | 1997-07-29 | 1997-07-29 | Universal monitor apparatus for quality control by using control diagram principle |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7246023B2 (en) * | 2004-01-26 | 2007-07-17 | Ranko, Llc | Flexible process optimizer |
| CN104111643A (en) * | 2014-06-13 | 2014-10-22 | 淮北富徳莱博食品科技有限公司 | Foodstuff production process safety monitoring system and monitoring method |
| CN105197260B (en) * | 2015-10-14 | 2017-03-08 | 哈尔滨工业大学 | A kind of satellite momentum wheel abnormal in early stage detection method based on Shewhart control chart |
| CN108897285A (en) * | 2018-06-15 | 2018-11-27 | 广州市康超信息科技有限公司 | A kind of balanced production method of electronic product |
| CN110764040B (en) * | 2019-10-22 | 2022-04-22 | 国网湖北省电力有限公司计量中心 | Method and system for determining error measurement function of automatic verification system |
| CN110852617B (en) * | 2019-11-11 | 2022-09-09 | 中电工业互联网有限公司 | SMT production line analysis method and system based on real-time data acquisition |
| CN110826024A (en) * | 2019-11-18 | 2020-02-21 | 中国华能集团清洁能源技术研究院有限公司 | Sampling discrimination method for sensor data abnormity |
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