CN103823436A - Distributed metering management method and system thereof - Google Patents
Distributed metering management method and system thereof Download PDFInfo
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- CN103823436A CN103823436A CN201410047750.4A CN201410047750A CN103823436A CN 103823436 A CN103823436 A CN 103823436A CN 201410047750 A CN201410047750 A CN 201410047750A CN 103823436 A CN103823436 A CN 103823436A
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Abstract
The invention provides a distributed metering management method and a system thereof. The system is composed of a data acquisition unit, a data pre-processing unit, a monitoring unit and a database server. The data acquisition unit includes a plurality of speed collectors and a plurality of weighing collectors; the weighing collectors are connected with the data pre-processing unit successively by an amplifier, a filter, and an A/D converter; and the speed collectors are successively connected with a filtering shaping unit and a counter and then is connected with the data pre-processing unit. The data pre-processing unit is connected with the monitoring unit; and the monitoring unit is connected with the database server. According to the method, a mode of distributed system metering and centralized management by a computer is used. Therefore, lots of investments can be saved; and the metering management work is standardized and is promoted to a new scale. The running state of equipment can be monitored in real time; the production security is ensured; and the great economic benefits and social benefits can be brought.
Description
Technical field
The present invention relates to metering system field, specifically a kind of distributed measuring control method and system thereof.
Background technology
In the industries such as metallurgy, electric power, coal, mine, chemical industry, grain, harbour, need to carry out dynamically accurate measurement continuously to bulk material on belt conveyer.The electronic scales in past is separate unit instrument, does not contact each other, checks meter, adds up, gathers, calculates all by manually completing, workload is large, with a low credibility, let alone real-time, can not instruct in time production, lack a kind of method and corresponding system of centralized measure management.
Summary of the invention
The present invention, in order to solve the problem of prior art, provides a kind of employing distributed system metering, metering method and the system thereof of computing machine centralized management.
Method provided by the invention comprises the following steps:
1) each LOAD CELLS detects instantaneous mass amount W (t) on belt conveyer scale effective weighing section, the data that detect in LOAD CELLS be converted to pulse signal and be treated as after numerical data by amplifier, wave filter and A/D converter, numerical data being sent to data and give processing unit;
Meanwhile, each speed pickup detects the instantaneous velocity of belt, is converted to pulse signal and is treated as and is sent to data after numerical data and gives processing unit by filter shape assembly and counting unit detecting data on speed pickup;
2) data are given processing unit according to formula: inventory Q=∫ Q (t) dt=∫ Δ P (t) v (t) dt=∫ W (t)/L*v (t) dt carrying in time t obtains result;
3) data are given processing unit result are passed to monitoring unit, monitoring unit by data upload to database server.
Further improve, monitoring unit stops data upload to database server and the work of error burst sensor while finding error in data, give the alarm simultaneously.
The system that the present invention also provides a kind of described distributed measuring control method to use, comprise that data acquisition unit, data give processing unit, monitoring means and database server, wherein, data acquisition unit comprises some speed acquisition devices and some collectors of weighing, and LOAD CELLS is given processing unit by amplifier, wave filter and A/D converter and data successively and is connected; Speed pickup is successively by filter shape unit sum counter and give processing unit with data and be connected; Data are given processing unit and are connected with monitoring unit, and monitoring unit is connected with database server.
Further improve, the described collector of weighing adopts TS series pulling type sensor.
Further improve, described speed acquisition device is optocoupler sensor.
Further improve, described monitoring unit comprises main frame and is connected to the alarm on main frame.
Further improve, described monitoring unit main frame is equipped with printer and leaves OPC teletransmission interface.
Beneficial effect of the present invention is:
1, adopted distributed system metering, the mode of computing machine centralized management, not only can save great amount of investment, and can make measurement standardize, top bar, and energy real-time monitoring equipment running status, guarantee production safety, can produce larger economic benefit and social benefit.
2, system accuracy is high, and dynamic accumulation error is less than ± and 0.125%.
3, system run all right, system operates on WindowsXP/2000 platform, continuous working, power failure data is not lost.
4, real-time is good, and data sampling frequency is high, guarantees high precision, and teletransmission fast guarantees that far-end computer receives data once, Real time dynamic display data in 0.5 second.
5, main frame can be integrated with third party's data by OPC teletransmission interface.
6, can realize on-the-spot Report Form Design by printer.
Accompanying drawing explanation
Fig. 1 is module diagram of the present invention;
Fig. 2 is system architecture of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Method provided by the invention comprises the following steps:
1) each LOAD CELLS detects instantaneous mass amount W (t) on belt conveyer scale effective weighing section, the data that detect in LOAD CELLS be converted to pulse signal and be treated as after numerical data by amplifier, wave filter and A/D converter, numerical data being sent to data and give processing unit;
Meanwhile, each speed pickup detects the instantaneous velocity of belt, is converted to pulse signal and is treated as and is sent to data after numerical data and gives processing unit by filter shape assembly and counting unit detecting data on speed pickup;
2) data are given processing unit according to formula: inventory Q=∫ Q (t) dt=∫ Δ p (t) v (t) dt=∫ W (t)/L*v (t) dt carrying in time t obtains result;
3) data are given processing unit result are passed to monitoring unit, monitoring unit by data upload to database server.
Further improve, monitoring unit stops data upload to database server and the work of error burst sensor while finding error in data, give the alarm simultaneously.
Principle is wherein:
In the time that belt moves with speed V, the inventory of carrying in time T:
Q＝ΔP×V×T
Δ P---weight of material Kg/m in unit length
V---belt speed m/s
T---time of delivery s
Weight of material inhomogeneous on actual belt, belt speed also has variation therefore its convey materials amount is:
Q＝∫Q(t)dt＝∫ΔP(t)v(t)dt＝∫W(t)／L×v(t)dt
In formula:
The inventory (kg/s) of Q (t)=instantaneous conveying
V (t)=belt instantaneous velocity (m/s)
Instantaneous mass amount (Kg) on W (t)=effective weighing section
L=effective weighing section length (m)
LOAD CELLS produces strain under material gravity W (t) effect, and its dependent variable Δ U is proportional to W (t),
That is:
W (t)=K1 Δ U (t) wherein K1 is constant.
Again because belt speed is proportional to speed pickup output pulse n
That is: V (t)=K2 × n (t)
Shellfish: Q=∫ W (t)/L × V (t) dt=K ∫ Δ U (t) n (t) dt
Wherein: K=K1K2/L is constant coefficient
System provided by the invention as shown in Figure 1, comprise that data acquisition unit, data give processing unit, monitoring means and database server, wherein, data acquisition unit comprises some speed acquisition devices and some collectors of weighing, and LOAD CELLS is given processing unit by amplifier, wave filter and A/D converter and data successively and is connected; Speed pickup is successively by filter shape unit sum counter and give processing unit with data and be connected; Data are given processing unit and are connected with monitoring unit, and monitoring unit is connected with database server.
1) LOAD CELLS
LOAD CELLS adopts TS series pulling type sensor, and it has 0.02% precision, linear, not repeated.Hysteresis quality is all better than 0.02%F.S, temperature coefficient≤0.002%F.S ℃, and overload capacity is strong.Amplification filtering input a/d converter.A/D converter converts analog voltage to digital signal, and its conversion accuracy is better than 0.024%.In order to improve A/D converter precision and stability, adopt power source special to power to it.
2) speed acquisition device
Speed acquisition device is made up of parts such as optocoupler, filtering, shaping, countings.Speed sensor signal is introduced by optocoupler, after filtering, removes and disturbs, and then, by trigger shaping, is input to counter.Rolling counters forward process is by Single-chip Controlling.
3) give processing unit and PC part
Give processing unit and comprise the single-chip microcomputer for industrial time controlling, the circuit such as program storage, data-carrier store, code translator, latch.For improve system reliability design Watchdog circuit and software trap.Select communication interface chip 8251 able to programme for distant place data communication, hardware using standard RS-232C interface circuit, can add line driver to realize telecommunication according to field condition.
As shown in Figure 2, data can directly be saved in database server to system architecture of the present invention, also can drive transmission by LAN (Local Area Network) or long line communication, have the teletransmission of OPC Interface realization simultaneously; In each client, installation data inquiry client as required, system can show output in real time, also can enquiry of historical data, by the computational analysis to data, provide decision-making for producing.
The market competitiveness of the present invention is embodied in following part:
1) system accuracy is high
Dynamic accumulation error is less than ± and 0.125%, for business clearing provide best metering performance
2) system run all right
System operates on WindowsXP/2000 platform, continuous working, and power failure data is not lost
3) real-time is good
Data sampling frequency is high, guarantees high precision, and teletransmission fast guarantees that far-end computer receives data once in 0.5 second,
Real time dynamic display data
4) dynamic statement design function
Provide on-the-spot Report Form Design function, self-defined personalized form
5) good configuration function
Configuration system take OPC as core, edit capability efficiently, abundant data representation ability, can edit out friendly man-machine interface attractive in appearance, and data statistic analysis function is intuitively provided, and can also integrate third party OPC data
6) data resource sharing
Data remote adopts DataSnap technology, realizes data sharing, multiple terminals simultaneous display data
7) system provides memory database, realizes quick storage, efficiently inquiry.
8) price advantage
Native system cost performance is high, is that other high-precision measuring system is incomparable.
9) CRT shows, contains much information, abundant in content.Can show the operational factors such as the on time, working time, zero point, loading, belt speed, instantaneous delivery, cumulative amount, order of classes or grades at school of many platform balances simultaneously. real-time, data are per second to be refreshed once.Thereby make managerial personnel very clear to running situation, guarantee to produce and normally carry out.
10) accomplished unattended, automatic management, power failure data is not lost, and incoming call time enters Real-Time Monitoring state automatically, data Auto-Memory, overload, load, fault etc. are carried out sound and light alarm automatically.Automatic printing, deposit, can from showing, form simulation reflect initial time, the termination time that accident occurs, especially overload is carried out to complete tracking. automatically generate various forms, also can need to make form according to user. form can be simulated demonstration, online modification. and timing or calling are printed, form can be printed continuously, automatic repagination, once completes various report output.
11) successfully having solved the long line of small-signal and transmitted the problems such as existing decay, interference. system measuring accuracy is high, stable and reliable operation.
12) mix corresponding sensor or topworks, can realize start-stop to belt conveyer scale, sideslip, flow etc. and control.
13) school zero perfect in shape and function: automatically, manually or zero point optional from three kinds of modes of motion tracking.
14) the various methods of operation are independent, are independent of each other, and demarcate and move and can carry out simultaneously, and automatically calculate calibration coefficient and issue zero point.
15) system data can be gone up mimic panel demonstration in real time or operation. and can connect with computer system, form real-time network.
The key technical indexes of the present invention is as follows:
(1) the static linearity: 0.1%;
(2) dynamic accumulation error :≤0.13%;
(3) repeatability: 0.1%;
(4) maximum flow: 5000t/h;
(5) drape over one's shoulders tape speed: 0.01～5m/s;
(6) belt feeder inclination angle: 0～18;
(7) picture refreshing time: 1s;
(8) data response time :≤1s;
(9) signal transmission distance: 1000m;
(10) switching value input: 32～128 points;
(11) switching value output: 24～64 points;
(12) controlled scale body: 4～16;
(13) data remote: RS-232C standard serial port;
(14) provide OPC interface.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improve and also should be considered as protection scope of the present invention.
Claims (7)
1. a distributed measuring control method, is characterized in that comprising the following steps:
1) each LOAD CELLS detects instantaneous mass amount W (t) on belt conveyer scale effective weighing section, the data that detect in LOAD CELLS be converted to pulse signal and be treated as after numerical data by amplifier, wave filter and A/D converter, numerical data being sent to data and give processing unit;
Meanwhile, each speed pickup detects the instantaneous velocity of belt, is converted to pulse signal and is treated as and is sent to data after numerical data and gives processing unit by filter shape assembly and counting unit detecting data on speed pickup;
2) data are given processing unit according to formula: inventory Q=∫ Q (t) dt=∫ Δ P (t) v (t) dt=∫ W (t)/L*v (t) dt carrying in time t obtains result;
3) data are given processing unit result are passed to monitoring unit, monitoring unit by data upload to database server.
2. distributed measuring control method according to claim 1 and 2, is characterized in that: monitoring unit finds to stop when error in data data upload to database server and the work of error burst sensor, gives the alarm simultaneously.
3. the system that described in a claim 1, distributed measuring control method is used, it is characterized in that: comprise that data acquisition unit, data give processing unit, monitoring means and database server, wherein, data acquisition unit comprises some speed acquisition devices and some collectors of weighing, and LOAD CELLS is given processing unit by amplifier, wave filter and A/D converter and data successively and is connected; Speed pickup is successively by filter shape unit sum counter and give processing unit with data and be connected; Data are given processing unit and are connected with monitoring unit, and monitoring unit is connected with database server.
4. the system that distributed measuring control method according to claim 3 is used, is characterized in that: the described collector of weighing adopts TS series pulling type sensor.
5. the system that distributed measuring control method according to claim 3 is used, is characterized in that: described speed acquisition device is optocoupler sensor.
6. the system that distributed measuring control method according to claim 3 is used, is characterized in that: described monitoring unit comprises main frame and is connected to the alarm on main frame.
7. the system that distributed measuring control method according to claim 6 is used, is characterized in that: described monitoring unit main frame is equipped with printer and leaves OPC teletransmission interface.
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| CN201410047750.4A CN103823436A (en) | 2014-02-08 | 2014-02-08 | Distributed metering management method and system thereof |
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| CN201410047750.4A CN103823436A (en) | 2014-02-08 | 2014-02-08 | Distributed metering management method and system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608242A (en) * | 2017-08-30 | 2018-01-19 | 滁州市西控电子有限公司 | A kind of distributed metering and centralized management system |
| CN109612562B (en) * | 2018-12-03 | 2021-01-05 | 江苏海宏信息科技有限公司 | Silo material weight metering system and method based on distributed weighing nodes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235116Y (en) * | 1995-07-18 | 1996-09-11 | 陆俊华 | Frequency conversion adjustable speed belt weigh meter |
| CN2615652Y (en) * | 2003-05-13 | 2004-05-12 | 叶锦林 | Leather belt conveyor metering device based on dynamic measurement |
| CN201522319U (en) * | 2009-09-28 | 2010-07-07 | 莱芜钢铁集团有限公司 | Network-type dynamic metering device for belt delivery |
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2014
- 2014-02-08 CN CN201410047750.4A patent/CN103823436A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235116Y (en) * | 1995-07-18 | 1996-09-11 | 陆俊华 | Frequency conversion adjustable speed belt weigh meter |
| CN2615652Y (en) * | 2003-05-13 | 2004-05-12 | 叶锦林 | Leather belt conveyor metering device based on dynamic measurement |
| CN201522319U (en) * | 2009-09-28 | 2010-07-07 | 莱芜钢铁集团有限公司 | Network-type dynamic metering device for belt delivery |
Non-Patent Citations (1)
| Title |
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| 王坤玮: "基于ARM的多功能电子皮带秤控制仪表设计", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608242A (en) * | 2017-08-30 | 2018-01-19 | 滁州市西控电子有限公司 | A kind of distributed metering and centralized management system |
| CN109612562B (en) * | 2018-12-03 | 2021-01-05 | 江苏海宏信息科技有限公司 | Silo material weight metering system and method based on distributed weighing nodes |
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Application publication date: 20140528 |