CN1749718A - Detecting instrument for monitoring strand tension in steel wire rope production - Google Patents
Detecting instrument for monitoring strand tension in steel wire rope production Download PDFInfo
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- CN1749718A CN1749718A CN 200510038347 CN200510038347A CN1749718A CN 1749718 A CN1749718 A CN 1749718A CN 200510038347 CN200510038347 CN 200510038347 CN 200510038347 A CN200510038347 A CN 200510038347A CN 1749718 A CN1749718 A CN 1749718A
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Abstract
The detecting instrument for monitoring strand tension in steel cable has strain gauge sensor for determining the strand tension in steel cable, signal processing circuit connected through conversion switch to the strain gauge sensor, A/D converter circuit and I/O interface circuit connected to microprocessor, and display circuit connected to the microprocessor. The present invention provides new way of on-line detecting strand tension in steel cable, and has novel structure, smart design, and high performance stability.
Description
Technical field:
The present invention relates to physical measurement techniques, is a kind of instrument of measuring tension force, specifically, is a kind of testing tool that is used for monitoring steel wire rope production run strand tension force.
Background technology:
Homemade wire rope main cause of low quality is the inhomogeneous of mechanical property, chemical constitution, twisting quality, the inhomogeneous level that depends mainly on China's metallurgical industry of mechanical property and chemical constitution wherein, twisting wire rope quality whether (mainly be twisting balancing tension) is then closely related with the manufacture level of wire rope industry.The way of present domestic each strand of wire rope enterprise control twisting equalization of strain is experience and manual method fully, and therefore, the inhomogeneous of twisting quality is the technical barrier that the wire rope industry should solve and be badly in need of solving.
The research of wire rope aspect is divided into product detection and production run control two parts substantially.The research of domestic wire rope aspect mainly concentrates on the product context of detection: based on magneto sensor, the broken wires in the wire rope finished product are carried out detection by quantitative as Yang Shuzi etc., effectively improved the usage level of wire rope.Yang Gongxun etc. extract wire rope and are subjected to force signal by the skill pressure sensor being sealed in the mode of wire rope, deliver to computing machine and handle, and have developed hoister steel wire rope tension on-line detecting system, and safeguarding for wire rope provides foundation.
About control twisting tension force, improve production run control technologys such as twisting quality, domestic research begins to relate to sth. made by twisting thigh stage of being become strand by silk, what technical difficulty was bigger becomes the tension control technology in one-tenth rope stage of rope then blank fully by thigh.Xu Honglin etc. have compared the difference of the sth. made by twisting thigh equipment of Europe wire rope industry and domestic wire rope industry, and proposing double twisting device twisting strand is the development in future direction, but this article is not touched upon into the situation in rope stage, does not carry out concrete research yet.Ji Haiqing has designed the Killing unit of tubular stranding machine, has eliminated the elastic stress of twisting steel wire preferably, helps strand uniformity of interior each steel wire.Huang Runliu has put in order the rope verification experimental verification by wire rope and has become the relation of rope stage strand twisting uniform tension in order degree and disrumpent feelings number of share of stock, rupture pull force and fatigue behaviour, but fails to propose to measure, be controlled to the measure of rope stage strand twisting tension force.
The way of each strand of the twisting of domestic enterprise's control at present equalization of strain is empirical method fully: general enterprise all stipulates 500～800 meters wire rope of every twisting, should stop, and the operator determines with sensation whether each strand tension force is balanced with each strand of have gentle hands light press.As feel basically identical, continue to produce; As think that deviation is bigger, the stretching pulley of then manual setting I-beam wheel side is adjusted manual the pushing that finish once more, resumes production after feeling to meet the requirements.After product is made,, generally do not put in order the rope test, and replace, consequently can't find the unbalanced degree of tension force between each strand, stay accident potential with the dissolution of partnership test to the service check of wire rope.
The research report of external relevant twisting wire rope Tension Control aspect is also rare, and a large amount of research work concentrate on the tension force context of detection of steel wire.JimL.johnson and Patrick Flanagan have developed a kind of thread-tension measurement mechanism, and the tension recovery situation of filament detected: ThomasC.Renner has developed wire rod and has made distributed digital control system and corresponding software on the basis to the complete investigation of wire industry control mode; U.S. Tension Measurement has enumerated the steel wire rope tension testing sensor in the product sample of Inc, the monitoring of the wire rope operating load that this sensor is used for using; The Health and Safety Executive complete investigation the situation of wire rope industry Dynamic Non-Destruction Measurement and equipment in the world, to major equipment supplier such as Britain British Coal company in the industry, South Africa AATS company, Germany DMT company, the equipment of U.S. NDTTechnologies company etc. has carried out classification and has gathered, summarized materials shows, the said equipment is many to be to detect principle with the electromagnetic mode, the wire rope specification broad that is suitable for, but it is wherein directly few at the pick-up unit that becomes the rope process monitoring, and its size is bigger, weight is between 5kg-120kg, for the technological transformation of existing home equipment, obviously do not use may with value.
Summary of the invention:
The purpose of this invention is to provide and a kind ofly can improve the number of share of stock that wire rope is broken simultaneously, satisfy and produce actual needs, significantly improved the performance of wire rope, particularly improve the fatigue behaviour of wire rope, thereby improved the testing tool that is used for monitoring steel wire rope production run strand tension force of its safety in utilization.
Technical solution of the present invention is: a kind of testing tool that is used for monitoring steel wire rope production run strand tension force, it is characterized in that: be useful on the strain-gauge transducer of measuring each strand tension force of wire rope respectively, the sensor circuit of each strain-gauge transducer connects signal processing circuit through switch, signal processing circuit connects microprocessor through A/D transfer circuit and I/O interface circuit, and microprocessor is connected to display circuit.
Total six covers that are respectively applied for the size of measuring each strand of wire rope strand tension force of sensor described in the present invention and sensor circuit adopt strain chip full-bridge type structure, and are furnished with corresponding bridge balance circuit.Signal processing circuit adopts multistage structure for amplifying; prime adopts high-performance instrumentation amplifier INA128; its inside has three operational amplifiers and forms the differential amplifier structure, built-in input overvoltage protection, and by the external different big or small different gains of resistance realization.A/D converter adopts 8 successive approximation structures, shows respective detection parameter size by nixie display, and by positioning indicator tracing display sense channel.System adopts programmable keyboard display interface chip I ntel279, is furnished with 2 control buttons and 4 figure place sign indicating number displays, can realize the init state adjustment of detection system by keyboard.System adopts independent quality power, is furnished with independently voltage-stabilizing system, and with microprocessor application system and all circuit control panel devices in a shielding control box, each sensor line is all adopted the cable of band screen layer.
Beneficial effect of the present invention is: the apply materials deformation principle, systematic study the deformation rule of three-point bending sensor, and set up the mathematical model in the loading process, opened up the new way of the online detection of strand wire rope tension; Design first and made the strand tension pick-up, be used to extract strand tension force T signal.Performance test shows that the related coefficient of strand tension pick-up reaches 0.999992, relative error 2.3457 * 10
-3, show that sensor has good linearty and repeatability; The relative error 6.6921 * 10 of stability test under 10 hours 30N
-4, absolute error 5.4756 * 10
-2, show that sensor has good static stability.Design first and made and the matching used strand tensile measurer of sensor, under the state of disturbing, its Circuits System relative error is 1.225 * 10 in given static state
-3, absolute error is 5.178 * 10
-2, show that strand tonometry Circuits System has good static antijamming capability; Continuous working is 24 hours under given static condition, and relative error is 9.030 * 10
-4, absolute error 1.327 * 10
-2, show that strand tonometry hardware system has good static stability.Under given dynamic disturbance state, its relative error is 4.976 * 10
-2, absolute error is 0.5431, shows that strand tonometry Circuits System has the better dynamic antijamming capability; Continuous working is 12 hours under dynamical state, relative error 3.965 * 10
-2, absolute error 0.5524 shows that strand tonometry Circuits System has better dynamic stability.Adopt assembly language to develop the Control Software of measuring strand tension force respectively, adopt the AT89C52 single-chip microcomputer to realize 6 tunnel analog quantitys are sampled, and adopt software mode to realize the linearization process of sensor, dynamically show testing result.By detecting strand tension force, the production run of monitoring 6X19-3.00mm, 6X19-6.20mm wire rope, extract representative sample, put in order the rope tension test by GB8358-87 " breaking tensile test of rope method ", the result shows that the number of share of stock that wire rope is broken has simultaneously on average increased by 1 strand, increase ratio 27.8%.The result of whole rope test shows, the online detection of wire rope security performance of this project research and the actual needs of the satisfied fully production of monitoring technique in real time, significantly improved the performance of wire rope, particularly improved the fatigue behaviour of wire rope, thereby improved its safety in utilization, for Steel Wire Products Industry provides the brand-new approach that upgrades under the prerequisite that equipment is not changed substantially, has the wide prospect of promoting the use of.
The present invention is further illustrated below in conjunction with drawings and Examples:
Description of drawings:
Fig. 1 is a kind of circuit structure block diagram that is used for the testing tool of monitoring steel wire rope production run strand tension force of the present invention;
Fig. 2 is the testing tool circuit diagram that is used for monitoring steel wire rope production run strand tension force of the present invention;
Fig. 3 is the structural representation that is used for sensor practical in the testing tool of monitoring steel wire rope production run strand tension force of the present invention;
Fig. 4 is the practical software flow pattern of testing tool that is used for monitoring steel wire rope production run strand tension force of the present invention.
Embodiment:
Fig. 1, Fig. 2, Fig. 3, Fig. 4 have described embodiments of the invention jointly.Below specify:
One, chip explanation:
UI-AT89C52-24PC；U2-TMP82C79P-2；U3-74LS138；
U4-ADC0809CCN；U5-INA128PA；U6-LM308；
U7-MC1403U；U8-DM7406N；U9-DM7406N；
U10-74LS74；U11-74LS02；U12-DS75451N；
U13-DS75451N。
Two, the general structure of detection system
Comprise among Fig. 1: positioning indicator 1, I/O interface circuit 2, display interface device circuit 3, light-emitting diode display 4, microprocessor 5, signal processing circuit 6, A/D converter 7, I/O interface circuit 8, time sequence control logic circuit 9, analog signal conversion switch 10, sensor circuit 11,12,13, address latch 14 etc.
Microprocessor system adopts AT89 series monolithic ATMEL89C52 as microcontroller, but the Flash storer of 8K overprogram is arranged in the sheet.According to the detection system application requirements, carried out necessary function expansion back and formed application system, comprising A/D interface circuit and programmable keyboard/display interface circuit etc.The detection system general structure as shown in Figure 2.
Detection system has the identical sensor circuit of six covers, is respectively applied for the size of measuring each strand of wire rope strand tension force, adopts strain chip full-bridge type structure, and is furnished with corresponding bridge balance circuit.Time sequence control logic by microprocessor is through address decoding gating respective channel; carry out the data sampling of signal; the hardware signal treatment circuit adopts multistage structure for amplifying; prime adopts high-performance instrumentation amplifier INA128; its inside has three operational amplifiers and forms the differential amplifier structure; built-in input overvoltage protection, and by the external different big or small different gains of resistance realization, applying flexible is convenient.A/D converter adopts 8 successive approximation structures.In order to monitor the detection case of respective channel, show respective detection parameter size by nixie display, and, high level value and low value are set according to examination criteria by positioning indicator tracing display sense channel.When testing result is higher than set high level value, show this strand strand overtension, high-level pilot lamp (redness) is lighted; When testing result is lower than set low value, show that this strand strand tension force is too small, low level indicator lamp (green) is lighted.System adopts programmable keyboard display interface chip I ntel 8279, is furnished with 2 control buttons and 4 figure place sign indicating number displays, can realize the init state adjustment of detection system by keyboard.
In order to improve the reliability of whole detection system, taked certain interference protection measure.Detection system has adopted independent quality power power supply, and is furnished with independently voltage-stabilizing system.For fear of external static electrification induction and electromagnetic induction interference, microprocessor application system and all circuit control panel devices in a shielding control box, are all adopted the cable of band screen layer to each sensor line.
Four, detecting sensor
Also be self-control with the matching used strand wire rope tension of detector determination sensor, with the complete testing tool of the common composition of detector.This sensor is made up of strain ga(u)ge, resilient support and testing circuit three parts.Strain ga(u)ge is selected commercially available 120 ohm measuring resistance strainometer for use.The geometry signal of this strand tension pick-up as shown in Figure 5.It is made up of a bearing 35 and three semi-girders 32,33,36.Wherein 33 and 36 is fixed beams, the 32nd, and the work beam.Four corresponding respectively upper and lower surfaces that are attached to work beam 32 of resistance strain gage 34 are formed the full-bridge type structure.Wire rope strand 31 is come in below beam 33 grooves, around above beam 32 grooves, and then around below beam 36 grooves, coming out.Like this, when 31 tensions of wire rope strand, will produce pressure, make it produce certain flexural deformation semi-girder 32,33,36 contacted three some places.When semi-girder was crooked, the foil gauge that is attached on 32 beams produced corresponding dependent variable.Make arm resistance change, output relevant voltage signal V.
Five, detector software design
Control system software adopts the modular program designing technique, according to the functional requirement of system, system software is divided into relatively independent module.Software function mainly comprises two big classes: a class is to finish various substantial application software, comprises detecting operation, each channel data sampling, data processing and Presentation Function etc.; Another kind of is watchdog routine, is specifically designed to coordinate each execution module, finishes System self-test, initialization and processing command etc.
During start, system will carry out comprehensive power-on self-test, comprise cpu instruction system, internal memory RAM, interrupt function, program curing etc., after system finishes self check, will carry out initial work, and comprise stack pointer is set, put initial value to the data buffer, put each zone bit state etc.
Microprocessor external interrupt INT1 input signal comes from the EOC signal EOC pin of interface chip A/D, adopts interrupt mode to read sampled data.Same passage is carried out the sampling of continuous 5 secondary data, remove wherein maximal value and minimum value, ask the mean value of remaining three data then, with the noise of filtering superposition on signal.
Claims (6)
1, a kind of testing tool that is used for monitoring steel wire rope production run strand tension force, it is characterized in that: be useful on the strain-gauge transducer of measuring each strand tension force of wire rope respectively, the sensor circuit of each strain-gauge transducer connects signal processing circuit through switch, signal processing circuit connects microprocessor through A/D transfer circuit and I/O interface circuit, and microprocessor is connected to display circuit.
2, the testing tool that is used for monitoring steel wire rope production run strand tension force according to claim 1, it is characterized in that: total six covers that are respectively applied for the size of measuring each strand of wire rope strand tension force of sensor and sensor circuit, adopt strain chip full-bridge type structure, and be furnished with corresponding bridge balance circuit.
3, the testing tool that is used for monitoring steel wire rope production run strand tension force according to claim 1 and 2; it is characterized in that: signal processing circuit adopts multistage structure for amplifying; prime adopts high-performance instrumentation amplifier INA128; its inside has three operational amplifiers and forms the differential amplifier structure; built-in input overvoltage protection, and by the external different big or small different gains of resistance realization.
4, the testing tool that is used for monitoring steel wire rope production run strand tension force according to claim 1 and 2, it is characterized in that: A/D converter adopts 8 successive approximation structures, show respective detection parameter size by nixie display, and by positioning indicator tracing display sense channel.
5, the testing tool that is used for monitoring steel wire rope production run strand tension force according to claim 1 and 2, it is characterized in that: system adopts programmable keyboard display interface chip I ntel 8279, be furnished with 2 control buttons and 4 figure place sign indicating number displays, can realize the init state adjustment of detection system by keyboard.
6, the testing tool that is used for monitoring steel wire rope production run strand tension force according to claim 1 and 2, it is characterized in that: system adopts independent quality power, is furnished with independently voltage-stabilizing system, and with microprocessor application system and all circuit control panel devices in a shielding control box, each sensor line is all adopted the cable of band screen layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038347 CN1749718A (en) | 2005-02-06 | 2005-02-06 | Detecting instrument for monitoring strand tension in steel wire rope production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038347 CN1749718A (en) | 2005-02-06 | 2005-02-06 | Detecting instrument for monitoring strand tension in steel wire rope production |
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| CN1749718A true CN1749718A (en) | 2006-03-22 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169031A (en) * | 2011-05-25 | 2011-08-31 | 杭州海成电子技术有限公司 | Device for measuring and displaying stresses of rope belt and rope belt ferrule |
| CN102169032A (en) * | 2011-05-25 | 2011-08-31 | 杭州海成电子技术有限公司 | Measure and display apparatus of rope stress |
| CN102322987A (en) * | 2011-05-25 | 2012-01-18 | 杭州海成电子技术有限公司 | Device for measuring and displaying stress of rope belt and lantern ring of rope belt |
| CN102491147A (en) * | 2011-11-15 | 2012-06-13 | 江苏赛福天钢索股份有限公司 | Online tension control system and online tension control method for steel wire rope of elevator |
| CN102828288A (en) * | 2012-09-19 | 2012-12-19 | 焦作市海华纺织股份有限公司 | Spinning frame drafting drive system |
| CN103471758A (en) * | 2013-08-28 | 2013-12-25 | 重庆工商职业学院 | Tester for tension of steel wire and multi-steel wire spring processing system based on tester for tension of steel wire |
| CN103884461A (en) * | 2012-12-22 | 2014-06-25 | 中航贵州飞机有限责任公司 | Tension measuring device of tensile machine |
| CN104879122A (en) * | 2014-08-05 | 2015-09-02 | 中国石油集团渤海钻探工程有限公司 | Simulation and test device for sensors of depth tracking system |
-
2005
- 2005-02-06 CN CN 200510038347 patent/CN1749718A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169031A (en) * | 2011-05-25 | 2011-08-31 | 杭州海成电子技术有限公司 | Device for measuring and displaying stresses of rope belt and rope belt ferrule |
| CN102169032A (en) * | 2011-05-25 | 2011-08-31 | 杭州海成电子技术有限公司 | Measure and display apparatus of rope stress |
| CN102322987A (en) * | 2011-05-25 | 2012-01-18 | 杭州海成电子技术有限公司 | Device for measuring and displaying stress of rope belt and lantern ring of rope belt |
| CN102491147A (en) * | 2011-11-15 | 2012-06-13 | 江苏赛福天钢索股份有限公司 | Online tension control system and online tension control method for steel wire rope of elevator |
| CN102491147B (en) * | 2011-11-15 | 2014-08-27 | 江苏赛福天钢索股份有限公司 | Online tension control system and online tension control method for steel wire rope of elevator |
| CN102828288A (en) * | 2012-09-19 | 2012-12-19 | 焦作市海华纺织股份有限公司 | Spinning frame drafting drive system |
| CN103884461A (en) * | 2012-12-22 | 2014-06-25 | 中航贵州飞机有限责任公司 | Tension measuring device of tensile machine |
| CN103471758A (en) * | 2013-08-28 | 2013-12-25 | 重庆工商职业学院 | Tester for tension of steel wire and multi-steel wire spring processing system based on tester for tension of steel wire |
| CN103471758B (en) * | 2013-08-28 | 2015-09-30 | 重庆工商职业学院 | A kind of many wire springs system of processing based on steel wire tension tester |
| CN104879122A (en) * | 2014-08-05 | 2015-09-02 | 中国石油集团渤海钻探工程有限公司 | Simulation and test device for sensors of depth tracking system |
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