CN1272607C - Mechanical comparision type force standard machine - Google Patents
Mechanical comparision type force standard machine Download PDFInfo
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- CN1272607C CN1272607C CN 200410087641 CN200410087641A CN1272607C CN 1272607 C CN1272607 C CN 1272607C CN 200410087641 CN200410087641 CN 200410087641 CN 200410087641 A CN200410087641 A CN 200410087641A CN 1272607 C CN1272607 C CN 1272607C
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Abstract
The present invention relates to a mechanical comparison type force standard machine which is used for the technical field of the performance detection of a weighing device, a force measuring sensor and an electronic balance. The present invention is characterized in that the mechanical comparison type force standard machine comprises a measuring zone and a force value generating zone, wherein the force measuring sensor and a force transmission mechanism are arranged on the upper part of the measuring zone; a boosting frame is arranged at the bottom of the measuring zone, and is respectively and downwards connected with a guide mechanism, a ball leading screw, a speed reducer and a servo motor. An electric control part has the structure that the output end of an industrial control terminal is connected with a computer which is connected with an industrial control card; a programmable controller is respectively connected with the industrial control card, a position control module and a photoelectric measurement and feedback system through an interface end, wherein the output end of the position control module is connected with a servo driver; the output end of the servo driver is connected with a servo motor, and the output signal of the servo motor is fed back to the photoelectric measurement and feedback system. The mechanical comparison type force standard machine makes use of the numerical control technology and the precise mechanical transmission technology to realize 0.00015 mm/s micrometric displacement feeding for the first time, ensures that the difference value of the added load and the required load is in the precision range of a force machine, realizes dynamic loading, controls the precision of a loading force value within 0.01%, and realizes that the mechanical comparison type force standard machine is used as creep measurement for the first time.
Description
Technical field
The invention belongs to the metrological testing technology field, specifically a kind ofly be used to weigh, the mechanical comparision type force standard machines of force cell, electronic scales Performance Detection technology.
Background technology
LOAD CELLS, electronic scales are worth performance detection apparatus energetically and all adopt comparison formula force standard machines.Comparison formula force standard machines is that standard transducer and tested sensor are serially connected on the force standard machines together, produces the proof force value by mechanical deformation, utilizes standard transducer examination criteria power value, realizes tested sensor by comparison.The highest ranking of national standard (JJG734-2001) regulation force standard machines is 0.03 grade.In the market about the force standard machines mainstream product: mainly contain: 300KN piezoelectric ceramics comparison formula force standard machines; 300KN mechanical comparision type force standard machines; 500KN fully automatic hydraulic comparison formula force standard machines; 100KN lever force standard machines; 500KN lever force standard machines.
No matter be hydraulic pressure, machinery, piezoelectric ceramic type force standard machines, all exist long-time stability bad at present, or load time, load mode do not meet the requirement of OIML60 international recommendation, its test data does not possess " comparability " with external LOAD CELLS data of producing, thereby the LOAD CELLS that is unfavorable for China is moved towards the international market and exchanged with international.And, the comparison formula force standard machines of producing all can not really be done creep both at home and abroad, creep is the important indicator in the force transducer test, manufacturer's creep measurement is all by recovering measurement indirectly both at home and abroad, creep and recovery come down to distinguishing, recovery value is less than creep value, and the difference of creep and recovery and elastomeric material, thermal treatment, foil gauge, glue, technology are relevant.
Summary of the invention
The purpose of this invention is to provide a kind of mechanical comparision type force standard machines that can detect LOAD CELLS, the whole static performance index of electronic scales.Test a difficult problem with full performance (comprising linearity, sluggishness, repeatability, creep, sensitivity) in the solution wide range sensor production process, and meet the requirement of OIML60 international recommendation.
The object of the present invention is achieved like this: be made up of physical construction and electrical control two parts, physical construction wherein partly includes upper plate, middle plate, base plate, column, force cell, guiding mechanism, it is characterized in that: surround measurement zone by upper plate, middle plate, column, surround power value generating region by middle plate, base plate, column; Be provided with a force cell that is connected with upper plate and a force transmission mechanism on the top of measurement zone, the plate place is provided with an afterburning framework in the bottom of measurement zone, and this reinforcing framework is connected with guiding mechanism, ball-screw, reductor and servomotor respectively through power value generating region downwards; Electric control system includes the Industry Control terminal, computing machine, and programmable controller, the output terminal of Industry Control terminal is connected with computing machine, and computing machine is connected with the Industry Control card; Programmable controller by interface end respectively with the Industry Control card, position control module is connected with the photoelectric measurement feedback system, the output terminal of position control module is connected with servo-driver, the output terminal of servo-driver is connected with servomotor, and the output signal of servomotor feeds back to the photoelectric measurement feedback system again.The present invention is applied to Numeric Control Technology on the testing apparatus that it comprises that AC servo drive system, AC servo motor, accurate reductor, precision ball screw are paid first, afterburning framework, standard transducer and Numeric Control Technology.Computing machine sends instruction, through the servo driving card, the control servo-driver is regulated servomotor, servomotor drives reductor, through the shaft coupling that is installed on the reductor ball-screw is passed in gyration, the ball-screw revolution promotes screw and moves up and down, and running fix is led by linear bearing, screw drives afterburning framework and moves up and down and standard transducer is applied to power produces the proof force value, and this proof force value is applied on the tested sensor through afterburning framework simultaneously.
Sensor its deformation under rated load is 0.3mm, under the 100000 sensor calibration, and sensor deformational displacement value 0.000003mm, dimension needs minimum loading displacement below 3nm, could guarantee measuring accuracy.
Utilize Numeric Control Technology and precision mechanical transmission technology, by servo-driven module control servo drive system, the photoelectric measurement feedback system realizes closed-loop speed control.Realized the feeding of 0.00015mm/s micrometric displacement in the world first, during the creep test, guaranteed that institute adds load F and requires load F1 difference DELTA F in power machine precision is 0.01 grade of scope, realize dynamic load, dynamic load power value precision can be controlled in ten thousand/in, realized first doing creep measurement (creep control principle figure as shown in Figure 3) with the mechanical comparision type force standard machines.
Creep testing procedure (as shown in Figure 4):
1, the power machine is loaded on theoretical value F1 load by zero load in 5 seconds, and the power machine stops to load;
2, judge that whether the difference DELTA F of actual forces value F and F1 is greater than power machine precision (F1-Δ F1);
If 3 Δ F are greater than F1-Δ F1, with the feeding of 0.00015mm/s micrometric displacement, realize dynamic load, dynamic load power value precision ten thousand/in;
If 4 Δ F less than F1-Δ F1, stop to load, carry out the creep test.
Mechanical comparision type force standard machines physical construction is made up of the two large divisions, and middle plate top is a measurement zone, and middle plate below is a power value generating region.Measurement zone is surrounded by upper plate, middle plate, column, at measurement zone installation code sensor, force transmission mechanism.Power value generating region is surrounded by middle plate, base plate, column, in power value generating region servomotor, reductor, ball screw assembly,, guiding mechanism, afterburning framework etc. is installed.The generation of power value: servomotor inputs to reductor through shaft coupling, pass to ball screw assembly, after the reductor commutation, ball-screw adjutant gyration changes rectilinear motion into, ball-screw is added to the power value on the afterburning framework, tested sensor is laid in afterburning framework top, tested sensor is passed to standard transducer by transmission rod with power, and power value size is read by standard transducer.
Also be provided with a high low temperature test box at the middle part of measurement zone, in order to the performance index under the survey sensor environment temperature.
Electrical control is made up of two parts, and the one, host computer, the 2nd, slave computer.Host computer comprises computing machine, printer, and slave computer comprises programmable controller, servo-driven module, servo-driver, photoelectric measurement feedback system, Industry Control card etc.Host computer is responsible for reception, demonstration, processing, the printing of form and the drafting of graph of errors of data.Slave computer is responsible for servo drive system, realizes speed control, and the power machine is loaded, unloads the communication that reaches with host computer.Computing machine outputs signal to the Industry Control card, the Industry Control card is handled through programmable controller and is sent position control instruction to position control module, control module output signal in position amplifies signal through servo-driver exports to servomotor, the servomotor output torque is given mechanical system, generation power value, the servomotor rotational angle is through the photoelectric measurement feedback system measures and feed back to programmable controller, realizes closed-loop control.
Technical performance indexs such as the linearity of products such as the present invention can detect and weigh, force cell, electronic scales, repeatability, hysteresis, creep, SPAN.Accuracy class can reach 0.01 grade.
Force standard machines of the present invention is controlled servo drive system by servo-driven module, utilizes the photoelectric measurement feedback system to realize closed-loop speed control.Utilize wide speed control range, micrometric displacement feeding when realizing low speed guarantees that sensor loads fast feed during high speed, the velocity range that realization equipment moves up and down (0.00015mm/s-0.17mm/s) stepless speed regulation with nanoscale.
Utilize high and low speed to change, guarantee that every grade of test duration is in the requirement of satisfying No. 60 suggestion of OIML " LOAD CELLS metrological regulation " regulation.(0.00015mm/s-0.003mm/s) micrometric displacement feeding when utilizing low speed, the requirement that has solved sensor test linearity, hysteresis, repeatability.Realized the feeding of 0.00015mm/s micrometric displacement in the world first, guaranteed that institute adds load and requires load difference in power machine accuracy rating, realize dynamic load, dynamic load power value precision can be controlled in ten thousand/in, realized first doing creep measurement with comparison formula force standard machines.
Description of drawings
Fig. 1 is a structural representation sketch of the present invention
Fig. 2 is the right view of Fig. 1
Fig. 3 is creep control principle figure of the present invention
Fig. 4 is a creep test logic block diagram of the present invention
Fig. 5 is a circuit control principle block scheme of the present invention
Fig. 6 is circuit control principle figure of the present invention
To be described in further detail invention by example below, but following example only is the present invention's example wherein, the rights protection scope of not representing the present invention and being limited, the scope of the present invention is as the criterion with claims.
Embodiment
Example 1
By Fig. 1-2 is the mechanical part of mechanical comparision type force standard machines
Include upper plate 1, middle plate 5, base plate 12, column 7, force cell 2, guiding mechanism 8 surrounds measurement zone by upper plate, middle plate, column, surrounds power value generating region by middle plate, base plate, column; Be provided with a force cell 2 that is connected with upper plate 1 and a force transmission mechanism 3 on the top of measurement zone, force transmission mechanism is provided with one and sets upright cylinder 13, and this other end of setting upright cylinder is connected with upper plate, also is provided with a high low temperature test box 4 at the middle part of measurement zone; The plate place is provided with an afterburning framework 6 in the bottom of measurement zone, and this reinforcing framework is connected with guiding mechanism 8, ball-screw 9, reductor 11 and servomotor 14 respectively through power value generating region downwards.Among the figure 10 is support plate in addition.
The generation of power value: servomotor inputs to reductor through shaft coupling, pass to ball screw assembly, after the reductor commutation, ball-screw adjutant gyration changes rectilinear motion into, ball-screw is added to the power value on the afterburning framework, tested sensor is laid in afterburning framework top, tested sensor is passed to standard transducer by transmission rod with power, and power value size is read by standard transducer.
Electric control system includes the Industry Control terminal, computing machine, and programmable controller (as: shown in Figure 5), the output terminal of Industry Control terminal is connected with computing machine, and computing machine is connected with the Industry Control card; Programmable controller by interface end respectively with the Industry Control card, position control module is connected with the photoelectric measurement feedback system, the output terminal of position control module is connected with servo-driver, the output terminal of servo-driver is connected with servomotor, and the output signal of servomotor feeds back to the photoelectric measurement feedback system again.Be divided into two parts by function, the one, host computer, the 2nd, slave computer.Host computer comprises computing machine, printer, and slave computer comprises programmable controller, servo-driven module, servo-driver, photoelectric measurement feedback system, Industry Control card etc.Host computer is responsible for reception, demonstration, processing, the printing of form and the drafting of graph of errors of data.Slave computer is responsible for servo drive system, realizes speed control, and the power machine is loaded, unloads the communication that reaches with host computer.Computing machine outputs signal to the Industry Control card, the Industry Control card is handled through programmable controller and is sent position control instruction to position control module, control module output signal in position amplifies signal through servo-driver exports to servomotor, the servomotor output torque is given mechanical system, generation power value, the servomotor rotational angle feeds back to programmable controller through the photoelectric measurement feedback system measures, realizes closed-loop control.
Method of testing (as shown in Figure 6) at first is installed in tested sensor on the test fixture, and sensor is placed on the test desk together with anchor clamps, aligns; After confirming that sensor installs, click on the Genius mouse on computers and select transducer range, carry out the creep test.Pass through man-machine interface, that is: the Industry Control terminal offers computer run with test instruction, and be transferred to programmable controller (PLC) by the output line signal 1-signal 8 of Industry Control card (pci card), programmable controller carries out data processing to input signal, and by related switch Q, Q1, Q2, Q3, show corresponding pilot lamp HG0-HG3, display lamp HR1-HR3, and send position control instruction and give position control module (354 module), 354 module output signals amplify signal through servo-driver exports to servomotor M1 (14 among Fig. 2), drive servomotor M1 running output torque and give mechanical system, generation power value, utilize photoelectric sensor COM1, COM2 measures, and signal fed back to programmable controller (PLC) through the photoelectric measurement feedback system measures by output line signal 9, export to computing machine with the full detail printout through the Industry Control card again.In addition, the KM among Fig. 5 is a contactor, and K and K1 are relay, and SAO is a control knob, and S is the control switch, and SB1-SB6 is a control knob, and FM is a hummer.
3) highest ranking of national standard (JJG734-2001) regulation is 0.03 grade.Utilize the mechanical comparision type force standard machines of foregoing invention technology development, through 0.01 grade of China Testing Technology Institute's accuracy of detection, the OIML60 international recommendation of creep test method conforms and national standard (JJG734-2001) requirement.
With domestic mechanical comparision type force standard machines contrast table:
| Sequence number | Project | National standard | Home products | The |
| 1 | Power machine precision | 0.03 level | 0.01 level | 0.01 |
| 2 | Power value resolving power | 0.0001 | 0.00004-0.00005 | 0.00001-0.00003 |
| 3 | Test item | Creep, linearity, sluggishness, repeatability | Linear, sluggish, repeated | Creep, linearity, sluggishness, repeatability, SPAN |
| 4 | Rate of loading | 0.00075mm/s | 0.00015mm/ | |
| 5 | Add unloading time | 30s | Less than 30s | Less than |
| 6 | Control mode | Simulation | Numeral |
Claims (4)
1, the mechanical comparision type force standard machines that a kind ofly be used to weigh, force cell, the linearity of electronic scales, sluggishness, repeatability, creep, sensitivity behaviour detects, form by physical construction and electrical control two parts, physical construction wherein partly includes upper plate, middle plate, base plate, column, force cell, guiding mechanism is characterized in that: surround measurement zone by upper plate, middle plate, column, surround power value generating region by middle plate, base plate, column; Be provided with a force cell that is connected with upper plate and a force transmission mechanism on the top of measurement zone, the plate place is provided with an afterburning framework in the bottom of measurement zone, and this reinforcing framework is connected with guiding mechanism, ball-screw, reductor and servomotor respectively through power value generating region downwards; Electric control system includes the Industry Control terminal, computing machine, and programmable controller, the output terminal of Industry Control terminal is connected with computing machine, and computing machine is connected with the Industry Control card; Programmable controller by interface end respectively with the Industry Control card, position control module is connected with the photoelectric measurement feedback system, the output terminal of position control module is connected with servo-driver, the output terminal of servo-driver is connected with servomotor, and the output signal of servomotor feeds back to the photoelectric measurement feedback system again.
2, mechanical comparision type force standard machines according to claim 1 is characterized in that: also be provided with a high low temperature test box at the middle part of measurement zone.
3, mechanical comparision type force standard machines according to claim 1 is characterized in that: also be provided with one and set upright cylinder on force transmission mechanism, this other end of setting upright cylinder is connected with upper plate.
4, mechanical comparision type force standard machines according to claim 1, it is characterized in that: the output terminal of computing machine also is connected with printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410087641 CN1272607C (en) | 2004-11-23 | 2004-11-23 | Mechanical comparision type force standard machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410087641 CN1272607C (en) | 2004-11-23 | 2004-11-23 | Mechanical comparision type force standard machine |
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| CN1609569A CN1609569A (en) | 2005-04-27 |
| CN1272607C true CN1272607C (en) | 2006-08-30 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007036214B8 (en) * | 2006-12-07 | 2013-12-19 | Council Of Scientific & Industrial Research | Automated dead weight measuring machine for the calibration of strain gauges |
| CN101929903B (en) * | 2010-03-23 | 2012-11-28 | 昆山市创新科技检测仪器有限公司 | Anti-destruction device in static heavy machine experiment process |
| CN102564687B (en) * | 2011-12-28 | 2013-10-09 | 福建省计量科学研究院 | Height adjusting device for force standard machine |
| CN104406877A (en) * | 2014-12-04 | 2015-03-11 | 天津市计量监督检测科学研究院 | Portable force value loaded detection device |
| CN104807592A (en) * | 2015-05-18 | 2015-07-29 | 陶泽成 | Electric cylinder loading overlapping type force standard machine |
| CN106403867A (en) * | 2015-07-31 | 2017-02-15 | 北京航天计量测试技术研究所 | Linear displacement sensor test device applicable to high and low temperature environment |
| CN106289638A (en) * | 2016-09-18 | 2017-01-04 | 天津航天瑞莱科技有限公司 | A kind of low temperature force transducer performance verification device |
| CN107478381A (en) * | 2017-07-18 | 2017-12-15 | 霍丁格包尔文(苏州)电子测量技术有限公司 | Force snesor performance testing device and its application method |
| CN109654944B (en) * | 2019-02-01 | 2023-07-04 | 贵州精工利鹏科技有限公司 | Universal cartridge device test board |
| CN111521322B (en) * | 2020-06-03 | 2021-08-17 | 苏州铁马自动化科技有限公司 | Electro-hydraulic servo equipment for force standard machine and control method thereof |
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