CN105353812B - Current sensor zero point automatic adjusting apparatus - Google Patents
Current sensor zero point automatic adjusting apparatus Download PDFInfo
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- CN105353812B CN105353812B CN201510637952.9A CN201510637952A CN105353812B CN 105353812 B CN105353812 B CN 105353812B CN 201510637952 A CN201510637952 A CN 201510637952A CN 105353812 B CN105353812 B CN 105353812B
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- current sensor
- resistance
- magnetic balance
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- balance current
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a current sensor zero point automatic adjusting apparatus. Product test pads are fixed to test points of a magnetic balance current sensor PCB; a carrier fixes the magnetic balance current sensor PCB; the positioning carrier is fixed to a streamline by a carrier fixing device; a resistance prediction module mobile mechanism moves a resistance prediction module to the place above the test points of the magnetic balance current sensor PCB; test probes are connected to the product test pads; the magnetic balance current sensor PCB is subjected to a resistance test by the resistance prediction module, then the position and resistance of the PCB is obtained; the position and resistance are sent to a solder paste mechanism through a controller, so that the solder paste mechanism can apply the solder on the determined position at the magnetic balance current sensor PCB; the positioning carrier is moved to a resistor welding mechanism through the movement of the streamline, then a pasted resistor is welded to the magnetic balance current sensor PCB through the resistor welding mechanism; and then the positioning carrier is moved to a performance retest mechanism for retesting the zero point of the magnetic balance current sensor PCB, so that whether the magnetic balance current sensor PCB is qualified is determined.
Description
Technical field
The present invention relates to a kind of detection means of current sensor, more particularly to a kind of magnetic balance current sensor zero point
Detection means.
Background technology
Resistance returns to zero, and is indispensable link during magnetic balance current sensor is produced, and what resistance returned to zero is determined with bad well
The precision of product sensor, soon with the manufacture efficiency for determining product sensor slowly, so resistance returns to zero to magnetic balance electric current
The precision and yield of sensor has decisive influence.
Resistance zeroing includes：The detection of the original zero test of product, the selection of debugging resistance, the paster of resistance and welding,
Zero point repetition measurement these links.These links of existing magnetic balance current sensor resistor zeroing are required for artificial operation
Realize, cause the quality and production capacity of product stronger for the dependency of maker proficiency level, concordance it is difficult to ensure that.
There is following shortcoming when debugging in above-mentioned magnetic balance current sensor zero point：
1）Magnetic balance current sensor offset output differs greatly, and debugging resistance range is wider needed for returning to zero, different
The debugging resistance that the same offset output of product is adapted to there is also difference.Manually when zero point debugging is carried out, by general-purpose
Table test product zero point initial value, employee are chosen resistance further according to memory empirical value or synopsis and are debugged, because product
Magnet assembly has differences, and carries out based on experience value debugging with synopsis often occur and debug underproof phenomenon for the first time, needs basis
Zero change situation is debugged again, and cumbersome, efficiency is low.
2）Zero point commissioning experience value and synopsis affect big to product zero point debugging efficiency, while needing in process of production
Do not stop artificially to update which, if updating not in time or the abundant employee of commissioning experience leaves the post, debugging production capacity will die-off.
3）Manually carry out zero point debugging, debugging resistance not by accurately testing out, but by estimating out,
Occur that the zero point after production debugging can meet technical requirements, but distribution is more discrete, concordance is poor.
4）Manually debugged, debugging speed is slower, cost of labor is higher.
5）Manual debugging fully relies on employee and judges whether product debugs qualified, for product Zero change feelings before and after debugging
Condition, selected debugging resistance size, production debugging procedural information are not recorded, and production debugging process can not be reviewed.
The content of the invention
The technical problem to be solved is to provide magnetic balance current sense for above-mentioned the deficiencies in the prior art
Device zero point automatic debugging device.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for：
Current sensor zero point automatic debugging device, including controller, streamline, resistance estimation mechanism, point tin cream mechanism,
Resistive patch mechanism, resistance welding mechanism, performance repetition measurement mechanism, resistance estimation mechanism include resistance estimation module, resistance estimation
Module travel mechanism, carrier, carrier holder, test probe, test probe, product test pad, test probe are fixed
In resistance estimation module, test probe is fixed in test probe, and product test pad is fixed on magnetic balance current sense
In each test point of device PCB, carrier fixes magnetic balance current sensor PCB, and positioning carrier is fixed on stream by carrier holder
On waterline, resistance estimation module travel mechanism moves each test point of resistance estimation module to magnetic balance current sensor PCB
Top, and lower general who has surrendered test probe be connected on product test pad, resistance estimation module is entered to magnetic balance current sensor PCB
Row resistance test obtains position and resistance, passes to a tin cream mechanism by controller, and positioning carrier is moved on to by streamline movement
Place of point tin cream mechanism, puts tin cream mechanism point stannum at the defined location on magnetic balance current sensor PCB, then is moved by streamline
Positioning carrier is moved on to resistive patch mechanism the resistance of determination is attached on magnetic balance current sensor PCB, then moved by streamline
It is dynamic by positioning carrier move on to resistance welding mechanism by resistance welding mechanism by the resistance welding after paster in magnetic balance current sense
On device PCB, then positioning carrier is moved on to into performance repetition measurement mechanism by streamline movement magnetic balance current sensor PCB zero points are carried out
Repetition measurement, determines whether magnetic balance current sensor PCB is qualified.
Preferably, detent mechanism is also set up in resistance estimation module travel mechanism, resistance estimation module travel mechanism passes through
Detent mechanism moves resistance estimation module, such resistance estimation module and magnetic again after determining magnetic balance current sensor PCB positions
Product test pad positioning on balanced balanced current sensor PCB is more accurate.
Preferably, glue applying mechanism is also set up in performance repetition measurement mechanism, glue applying mechanism does not conform in magnetic balance current sensor PCB
Labelling on lattice product correspondence marked area point, is easy to distinguish product.
Above-mentioned resistance estimation module travel mechanism is robot arm, can be with Multidirectional-moving product.
Controller also records automatically debugged product type, production code member, zero point and initially exports, debugs resistance, tune
Examination resistance position, presetting rear output of products, final repetition measurement offset output, production time and operation employee information, it is convenient to produce
Product are reviewed.
Compared with prior art, first by debugging module test product zero point initial value, debugging system is calculated the present invention
Go out debugging resistance and the position of suitable each product, then by debugging module simulation output correspondence resistance, product is carried out pre-
Debugging, until product offset output meets setting value requirement, system records product necessary resistance resistance size, the welding position automatically
Put, product zero point information, and pass information to rear station and carry out debugging resistance automatic welding, therefore advantages of the present invention exists
In：The debugging of magnetic balance sensor zero point can be automatically performed.Production debugging efficiency high, production capacity are stable, debugging cost is low；Product is adjusted
Examination process approach unification, product zero point concordance are good；Whole debugging process information is recorded automatically, is conveniently reviewed.Product can also be improved
The production capacity and quality of product, is reduced to artificial dependence.
Description of the drawings
Fig. 1 is the current-output type product test wiring diagram of embodiment of the present invention current sensor zero point measurement.
Fig. 2 is the voltage output type product test wiring diagram of embodiment of the present invention magnetic balance current sensor zero point measurement.
Fig. 3 is the production debugging active component schematic diagram of embodiment of the present invention magnetic balance current sensor zero point measurement.
Fig. 4 is the product structure schematic diagram of embodiment of the present invention magnetic balance current sensor zero point automatic debugging device.
Fig. 5 is the product orientation meaning to be debugged of embodiment of the present invention magnetic balance current sensor zero point automatic debugging device
Figure.
Fig. 6 is the carrier positioning schematic diagram of embodiment of the present invention magnetic balance current sensor zero point automatic debugging device.
Fig. 7 is that the resistance estimation mechanism of embodiment of the present invention magnetic balance current sensor zero point automatic debugging device is illustrated
Figure.
Fig. 8 is the test probe schematic diagram of embodiment of the present invention magnetic balance current sensor zero point automatic debugging device.
Specific embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described.
Two kinds of existing magnetic balance current sensor zero point debugging principle point, is shown in Fig. 1 and Fig. 2.
As shown in Figure 1 and Figure 2, working power, test product M end output signal is provided by double loop power supply to product, R0 is
Load resistance.M ends output signal is both of which：Current output mode and voltage output pattern.Current output mode M ends export
Between I=I0- Δ I～I0+ Δ I, wherein I is M ends output current value, and I0 product standard zero current values, Δ I are product
The absolute value of zero current error amount；Between voltage output pattern M end output U=U0- Δ U～U0+ Δ U, wherein U is M ends
Output voltage values, U0 product standard zero-point voltage values, absolute values of the Δ U for product zero-point voltage error amount.
The principle of zero point debugging is exactly by adjusting the debugging resistance in product circuit, product is input into without primary current
In the case of, the output of M ends：I is as far as possible little with the absolute value of normal zero I0 differences；U is most with the absolute value of normal zero U0 differences
Amount is little, i.e. the absolute value of Δ I or Δ U is as far as possible little.
The component of production debugging resistance section shown in Fig. 3, reaches change product by choosing Ra, Rb of different resistances when zero point is debugged
The purpose of product M end signals output.Wherein when M ends export I ＜ I0 or U ＜ U0, reduce the resistance of resistance Ra, Δ I or Δ U will subtract
The little resistance for persistently reducing resistance Ra, Δ I or Δ U will be reduced to zero, then become big, now output of products I ＞ I0 or U ＞ U0；
When M ends export I ＞ I0 or U ＞ U0, reduce the resistance of resistance Rb, Δ I or Δ U will reduce, persistently reduce the resistance of resistance Rb,
Δ I or Δ U will be reduced to zero, then become big, now output of products I ＜ I0 or U ＜ U0.
Apparatus of the present invention are corresponding when being actually used with product, by resistance estimation mechanism, point tin cream mechanism, resistive patch
The position that mechanism, resistance welding mechanism, performance repetition measurement mechanism are located is referred to as station, is divided into five stations, and corresponding structure is total
Figure as shown in figure 4, in figure station one for determine debugging resistance and position resistance estimation station, station two be correspondence tune
The point tin cream station of examination resistance position spot printing tin cream, station three are that correspondence valued resistor is affixed on the position that product needed debugs resistance
The resistive patch station put, station four are the resistance welding station for completing resistance welding, and station five is zero point repetition measurement, is determined whether
Debugging is qualified, and the performance re-measurement station indicated to substandard product.
In Fig. 4,91 is complete equipment master control machine, and 92 are the optical alignment detection of prediction work station product, and 93 is resistance estimation mould
Block, 94 is resistance estimation station PC, and 96 is three axle robert, and 97 are prediction station electrical control cubicles, and 98 is automatically controlled for point tin cream station
Cabinet, 99 is the quantitative spot printing mechanism of tin cream, and 10 detect for the optical alignment of SMT work station products, and 11 is resistive patch mechanism, and 12 is resistance
Charging tray, 13 be resistive patch position correction mechanism, 14 be resistive patch station electrical control cubicles, 15 be resistive patch station PC, 16
For welding post electrical control cubicles, 17 is welding mechanism, and 18 is zero point re-measurement station electrical control cubicles, and 19 is zero point repetition measurement module, and 20 are stream
Waterline.
As shown in Figure 5 and Figure 6, debugged magnetic balance current sensor PCB5 is arranged on positioning carrier 55 in jigsaw mode
On, and pushed down by pressing plate 51, then by 52 pinning of pin, subsequently into one resistance estimation station of station, resistance estimation station passes through can
Product orientation carrier 55 to be fixed by detent mechanism 61.Product optical positioning system 92 starts, by product pcb board labelling
Putting identification, and upload the data to resistance estimation station PC 94 carries out data processing, so as to complete that product physical location is sat
Mark amendment, it is ensured that product orientation is accurate.Resistance estimation station control system 97 is according to debugged product model data base and optics
The coordinate that alignment system is provided, controls three axle robert 6,2 accurate movement of resistance estimation module is just gone up to each product to be debugged
Side, and decline, resistance estimation module detection probe 3 is connected with product test pad 6, as shown in fig. 7, proceeding by product zero
Point debugging.
In Fig. 7,1 is computer, and 2 is resistance estimation module, and 3 is test probe（Such as Fig. 8）, 4 are test probe, and 5 are
Product test pad, 6 is product to be debugged, and 7 is test circuit plate, and 8 is RS232 serial ports, and 9 is RS232 serial communication cables.
Above-mentioned test probe 3 is fixed in resistance estimation module 2, and test probe 4 is fixed in test probe 3, is produced
Product testing weld pad 5 is fixed in each test point of magnetic balance current sensor PCB5.
Fig. 8 is test probe figure, and test probe is the switching tooling of resistance estimation module and product, is provided simultaneously with electricity
Stream current-limiting function, has protective effect to module and product.
As resistance estimation module and test probe are separately provided, therefore different output types（Current-output type or
Voltage output type）The replaceable resistance estimation module of production debugging；The product of identical output type different model is surveyed according to product
Examination pad locations and the current settings threshold values corresponding test probe of replacing.
When resistance estimation module is successfully connected with magnetic balance current sensor PCB product, as shown in fig. 7, resistance estimation mould
First to product offer ± 15V working powers, V+ is+15V to block, and V- is -15V, and product is started working.Resistance estimation module is detected
Product M ends output signal, and M ends analogue signal is converted into into digital signal in resistance estimation module, then connect by RS232
Mouth carries out data transfer with computer.This signals collecting, transmission means can effectively ensure that the verity and accuracy of signal.
Because the zero signal of M ends output is usually the small current signal or the small voltage signal of 0.001V levels of 0.01mA levels, if directly
Long range propagation is carried out using analog quantity, signal is easily interfered, and unstable, it is impossible to as product zero point debugging according to
According to.
Computer is carried out to product by reading debugged product zero point original output situation, control resistance estimation module
Debugging, resistance estimation module connect correspondence resistance electricity by inside modules resistor to product Ra or Rb according to computer instruction
Resistance, then further according to product offset output situation of change, adjusts resistance size, wants until product offset output meets setting value
Ask, now record offset output before debugging resistance position, resistance size, production debugging needed for the product, offset output after debugging.
Resistance estimation work station product Debugging message is handed down to a tin cream station, resistive patch station, electricity by master control machine successively
Resistance welding post and zero point re-measurement station.Point tin cream station is welding resistance position according to production debugging information needed for product to be debugged
Put and complete tin cream spot printing；Resistive patch station is chosen correspondence resistance and is affixed on correspondence debugging resistance position；Resistance welding station passes through
Hot jet welding pattern is sequentially completed each production debugging resistance welding；Product finally flows into zero point re-measurement station, and re-measurement station is exchanged
Product after examination carries out zero point repetition measurement.If repetition measurement result meets zero point setting requirement, judge that the product is qualified；If repetition measurement result
Zero point setting requirement is unsatisfactory for, this judges that the product is unqualified.After same support plate other products complete repetition measurement, glue applying mechanism from
The red point on substandard product correspondence marked area point is moved, represents that the product is unqualified.
Claims (4)
1. current sensor zero point automatic debugging device, it is characterised in that：Including controller, streamline, resistance estimation mechanism, point
Tin cream mechanism, resistive patch mechanism, resistance welding mechanism, performance repetition measurement mechanism, resistance estimation mechanism include resistance estimation module,
Resistance estimation module travel mechanism, carrier, carrier holder, test probe, test probe, product test pad, test are visited
Needle plate is fixed in resistance estimation module, and test probe is fixed in test probe, and product test pad is fixed on magnetic balance
In each test point of current sensor PCB, carrier fixes magnetic balance current sensor PCB, and carrier is fixed by carrier holder
On streamline, resistance estimation module travel mechanism moves each survey of resistance estimation module to magnetic balance current sensor PCB
Above pilot, and lower general who has surrendered test probe is connected on product test pad, and resistance estimation module is to magnetic balance current sensor
PCB carries out resistance test and obtains position and resistance, passes to a tin cream mechanism by controller, and carrier is moved on to by streamline movement
Place of point tin cream mechanism, puts tin cream mechanism point stannum at the defined location on magnetic balance current sensor PCB, then is moved by streamline
Carrier is moved on to resistive patch mechanism the resistance of determination is attached on magnetic balance current sensor PCB, then will by streamline movement
Carrier move on to resistance welding mechanism by resistance welding mechanism by the resistance welding after paster on magnetic balance current sensor PCB,
Carrier is moved on to performance repetition measurement mechanism by streamline movement again carries out repetition measurement to magnetic balance current sensor PCB zero points, determines magnetic
Whether balanced balanced current sensor PCB is qualified.
2. current sensor zero point automatic debugging device as claimed in claim 1, it is characterised in that：Resistance estimation module is moved
Mechanism is robot arm.
3. current sensor zero point automatic debugging device as claimed in claim 1, it is characterised in that：Move in resistance estimation module
Motivation structure also sets up detent mechanism, and resistance estimation module travel mechanism determines magnetic balance current sensor PCB by detent mechanism
Move resistance estimation module behind position again.
4. current sensor zero point automatic debugging device as claimed in claim 1, it is characterised in that：In performance repetition measurement mechanism also
Glue applying mechanism, glue applying mechanism labelling on magnetic balance current sensor PCB substandard products correspondence marked area point are set.
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| CN201510637952.9A CN105353812B (en) | 2015-09-30 | 2015-09-30 | Current sensor zero point automatic adjusting apparatus |
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|---|---|---|---|
| CN201510637952.9A CN105353812B (en) | 2015-09-30 | 2015-09-30 | Current sensor zero point automatic adjusting apparatus |
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| CN105353812B true CN105353812B (en) | 2017-03-22 |
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| CN110598310A (en) * | 2019-09-09 | 2019-12-20 | 珠海格力电器股份有限公司 | Signal conditioning method, circuit system, conditioning apparatus and storage medium |
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| CN103226165A (en) * | 2013-04-08 | 2013-07-31 | 无锡凌湖科技有限公司 | TMR self-zeroing digital current sensor and self-zeroing method thereof |
| CN104254784A (en) * | 2012-04-27 | 2014-12-31 | 精工电子有限公司 | Sensor device |
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| JP2015015390A (en) * | 2013-07-05 | 2015-01-22 | 木村 光照 | Offset voltage correction method of hall device and hall sensor employing the same |
| JP6320770B2 (en) * | 2014-01-31 | 2018-05-09 | 日置電機株式会社 | Zero magnetic flux control type current sensor and zero adjustment method for zero magnetic flux control type current sensor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104254784A (en) * | 2012-04-27 | 2014-12-31 | 精工电子有限公司 | Sensor device |
| CN103226165A (en) * | 2013-04-08 | 2013-07-31 | 无锡凌湖科技有限公司 | TMR self-zeroing digital current sensor and self-zeroing method thereof |
Non-Patent Citations (1)
| Title |
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| 霍尔电流传感器及其自动调测系统的设计;齐冬梅;《中国优秀硕士学位论文全文数据库》;20111215(第S2期);全文 * |
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