CN105353812A - Current sensor zero point automatic adjusting apparatus - Google Patents
Current sensor zero point automatic adjusting apparatus Download PDFInfo
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- CN105353812A CN105353812A CN201510637952.9A CN201510637952A CN105353812A CN 105353812 A CN105353812 A CN 105353812A CN 201510637952 A CN201510637952 A CN 201510637952A CN 105353812 A CN105353812 A CN 105353812A
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- current sensor
- resistance
- magnetic balance
- balance current
- sensor pcb
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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
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 pick-up unit of current sensor, particularly the pick-up unit at a kind of magnetic balance current sensor zero point.
Background technology
Resistance returns to zero, it is indispensable link during magnetic balance current sensor is produced, good and the bad precision determining product sensor of resistance zeroing, the fast manufacture efficiency with determining product sensor slowly, so resistance zeroing has decisive influence to the precision of magnetic balance current sensor and output.
Resistance zeroing comprises: the paster of the detection of the original zero test of product, the choosing of debugging resistance, resistance and welding, zero point these links of repetition measurement.These links of existing magnetic balance current sensor resistor zeroing all need manual operation to realize, cause the quality of product and production capacity stronger for the dependence of fabricator's skill level, consistance is difficult to guarantee.
Following shortcoming is there is when above-mentioned magnetic balance current sensor is debugged zero point:
1) magnetic balance current sensor offset output differs greatly, and zeroing required debugging resistance range is comparatively wide, and the debugging resistance that the same offset output of different products is applicable to also there are differences.Artificial when carrying out debugging zero point, by multimeter test products initial value at zero point, employee debugs according to remembering empirical value or choosing resistance to making a list again, because product magnet assembly there are differences, debug normal appearance based on experience value and to making a list and debug underproof phenomenon for the first time, again need debug according to Zero change situation, complex operation, efficiency are low.
2) zero point commissioning experience value and the table of comparisons large on the impact of product debugging efficiency at zero point, need not stop in process of production artificially to upgrade it simultaneously, if upgrade not in time or the abundant employee of commissioning experience leave the post, debugging production capacity will die-off.
3) manually carry out debugging at zero point, debugging resistance not by accurately testing out, but by what estimate out, there will be and can meet technical requirement the zero point after production debugging, but distribution is more discrete, and consistance is poor.
4) manually debug, debugging speed is comparatively slow, and cost of labor is higher.
5) manual debugging rely on employee to judge completely whether product is debugged qualified, and for product Zero change situation, selected debugging resistance size, production debugging procedural information not record before and after debugging, production debugging process can not be reviewed.
Summary of the invention
Technical matters to be solved by this invention provides magnetic balance current sensor automatic debugging device at zero point for above-mentioned the deficiencies in the prior art.
The present invention solves the problems of the technologies described above adopted technical scheme:
Current sensor automatic debugging device at zero point, comprise controller, streamline, resistance estimation mechanism, point tin cream mechanism, resistive patch mechanism, resistance welded mechanism, performance repetition measurement mechanism, resistance estimation mechanism comprises resistance estimation module, resistance estimation module travel mechanism, carrier, carrier fixator, test probe, test probe, product test pad, test probe is fixed in resistance estimation module, test probe is fixed in test probe, product test pad is fixed in each test point of magnetic balance current sensor PCB, carrier fixes magnetic balance current sensor PCB, positioning carrier is fixed on streamline by carrier fixator, resistance estimation module travel mechanism moves above resistance estimation module to each test point of magnetic balance current sensor PCB, and lower general who has surrendered's test probe is connected on product test pad, resistance estimation module is carried out resistance test to magnetic balance current sensor PCB and is obtained position and resistance, a tin cream mechanism is passed to by controller, streamline moves and positioning carrier is moved on to a place of tin cream mechanism, the position point tin that some tin cream mechanism determines on magnetic balance current sensor PCB, moved by streamline again and positioning carrier is moved on to resistive patch mechanism the resistance determined is attached on magnetic balance current sensor PCB, again by streamline move positioning carrier moved on to resistance welded mechanism by resistance welded mechanism by the resistance welded after paster on magnetic balance current sensor PCB, moved by streamline again and positioning carrier is moved on to performance repetition measurement mechanism zero point repetition measurement is carried out to magnetic balance current sensor PCB, determine that whether magnetic balance current sensor PCB is qualified.
Better, in resistance estimation module, travel mechanism also arranges detent mechanism, resistance estimation module travel mechanism is by moving resistance estimation module again behind detent mechanism determination magnetic balance current sensor PCB position, and it is more accurate that the product test pad on such resistance estimation module and magnetic balance current sensor PCB is located.
Better, at performance repetition measurement mechanism also set-point gluing mechanism, glue applying mechanism marks on the point of magnetic balance current sensor PCB substandard product corresponding marked area, is convenient to distinguish product.
Above-mentioned resistance estimation module travel mechanism is mechanical hand, can Multidirectional-moving product.
Controller also records debugged product type automatically, production code member, zero point initially export, debug resistance, debugging resistance position, presetting rear output of products, final repetition measurement offset output, production time and operation employee information, facilitate product back-tracing.
Compared with prior art, the present invention is first by debugging module test products initial value at zero point, debug system calculates debugging resistance and the position of applicable each product, again by the corresponding resistance of debugging module modulating output, product is debugged in advance, until product offset output meets setting value requirement, system records resistance size needed for this product, welding position, product information at zero point automatically, and information is passed to rear station and carry out debugging resistance automatic welding, therefore the invention has the advantages that: automatically can complete the debugging of magnetic balance sensor zero point.Production debugging efficiency is high, production capacity stable, debugging cost is low; Production debugging process approach is unified, and product consistance at zero point is good; The automatic record of whole debug process information, conveniently reviews.Production capacity and the quality of product can also be improved, reduce artificial dependence.
Accompanying drawing explanation
Fig. 1 is the current-output type product test wiring diagram of embodiment of the present invention current sensor measurement at zero point.
Fig. 2 is the voltage output type product test wiring diagram of embodiment of the present invention magnetic balance current sensor measurement at zero point.
Fig. 3 is the production debugging active component schematic diagram of embodiment of the present invention magnetic balance current sensor measurement at zero point.
Fig. 4 is the product structure schematic diagram of embodiment of the present invention magnetic balance current sensor automatic debugging device at zero point.
Fig. 5 is the product orientation intention to be debugged of embodiment of the present invention magnetic balance current sensor automatic debugging device at zero point.
Fig. 6 is the carrier location schematic diagram of embodiment of the present invention magnetic balance current sensor automatic debugging device at zero point.
Fig. 7 is the resistance estimation structural scheme of mechanism of embodiment of the present invention magnetic balance current sensor automatic debugging device at zero point.
Fig. 8 is the test probe schematic diagram of embodiment of the present invention magnetic balance current sensor automatic debugging device at zero point.
Embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described.
Existing magnetic balance current sensor debugging principle at zero point divides two kinds, sees Fig. 1 and Fig. 2.
As shown in Figure 1 and Figure 2, provide working power by double loop power supply to product, test products M holds output signal, and R0 is pull-up resistor.M holds output signal to be two kinds of patterns: current output mode and voltage output mode.Current output mode M holds and exports between I=I0-Δ I ~ I0+ Δ I, and wherein I is that M holds output current value, I0 product standard zero current value, and Δ I is the absolute value of product zero current error amount; Voltage output mode M holds and exports between U=U0-Δ U ~ U0+ Δ U, and wherein U is that M holds output voltage values, and U0 product standard zero-point voltage value, Δ U is the absolute value of product zero-point voltage error amount.
The principle of debugging at zero point is exactly the debugging resistance by regulating in product circuit, and make product when inputting without primary current, M holds output: the absolute value of I and normal zero I0 difference is as far as possible little; The absolute value of U and normal zero U0 difference is as far as possible little, and namely the absolute value of Δ I or Δ U is as far as possible little.
The resistance section of production debugging shown in Fig. 3 component, Ra, Rb by choosing different resistance when zero point debugs reach the object changing product M end signal and export.Wherein when M end exports I < I0 or U < U0, reduce the resistance of resistance Ra, Δ I or Δ U will reduce the resistance continuing to reduce resistance Ra, Δ I or Δ U will reduce to zero, then become large, now output of products I > I0 or U > U0; When M end exports I > I0 or U > U0, reduce the resistance of resistance Rb, Δ I or Δ U will reduce, continue the resistance reducing resistance Rb, Δ I or Δ U will reduce to zero, then become large, now output of products I < I0 or U < U0.
It is corresponding when apparatus of the present invention are use actual with product, by resistance estimation mechanism, point tin cream mechanism, resistive patch mechanism, resistance welded mechanism, the position at performance repetition measurement mechanism place is called station, be divided into five stations, corresponding structure is always schemed as shown in Figure 4, in figure, station one is for determining the resistance estimation station debugging resistance and position, station two is the some tin cream station at correspondence debugging resistance position spot printing tin cream, station three is the resistive patch station of the position corresponding valued resistor being affixed on product needed debugging resistance, station four is for completing the resistance welded station of resistance welded, station five is repetition measurement at zero point, determine whether that debugging is qualified, and to the performance re-measurement station that substandard product indicates.
In Fig. 4,91 is equipment set master control machine, 92 is prediction work station product optical alignment detection, 93 is resistance estimation module, 94 is resistance estimation station PC, 96 is three axle robert, 97 is prediction station electrical control cubicles, 98 is a tin cream station electrical control cubicles, 99 is the quantitative spot printing mechanism of tin cream, 10 is that the optical alignment of SMT work station product detects, 11 is resistive patch mechanism, 12 is resistance charging tray, 13 is resistive patch position correction mechanism, 14 is resistive patch station electrical control cubicles, 15 is resistive patch station PC, 16 is welding post electrical control cubicles, 17 is welding mechanism, 18 is re-measurement station electrical control cubicles at zero point, 19 is repetition measurement module at zero point, 20 is streamline.
As shown in Figure 5 and Figure 6, debugged magnetic balance current sensor PCB5 is arranged on positioning carrier 55 in jigsaw mode, and pushed down by pressing plate 51, again by pin 52 pinning, then enter station one resistance estimation station, resistance estimation station is by fixing product orientation carrier 55 by detent mechanism 61.Product optical positioning system 92 starts, and by product P CB plate reference point identifying, and upload the data to resistance estimation station PC 94 and carries out data processing, thus complete the correction of product actual position coordinate, ensures that product orientation is accurate.The coordinate that resistance estimation station control system 97 provides according to debugged product model database and optical positioning system, control three axle robert 6, resistance estimation module 2 is accurately moved to directly over each product to be debugged, and decline, resistance estimation module detector probe 3 is connected with product test pad 6, as shown in Figure 7, start to carry out product debugging at zero point.
In Fig. 7,1 is computing machine, and 2 is resistance estimation module, and 3 is test probe (as Fig. 8), and 4 is test probe, and 5 is product test pad, and 6 is product to be debugged, and 7 is testing circuit board, and 8 is RS232 serial ports, and 9 is RS232 serial communication cable.
Above-mentioned test probe 3 is fixed in resistance estimation module 2, and test probe 4 is fixed in test probe 3, and product test 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, possesses current limitation function simultaneously, has protective effect to module and product.
Because resistance estimation module and test probe are arranged all separately, the therefore replaceable resistance estimation module of production debugging of different output type (current-output type or voltage output type); The product of identical output type different model changes corresponding test probe according to product test pad locations and current settings threshold values.
When resistance estimation module is successfully connected with magnetic balance current sensor PCB product, as shown in Figure 7, first resistance estimation module provides ± 15V working power to product, and V+ is+15V, V-is-15V, and product is started working.Resistance estimation module testing product M holds output signal, and is held by M simulating signal to convert digital signal in resistance estimation module, then carries out data transmission by RS232 interface and computing machine.This signals collecting, transmission mode effectively can ensure authenticity and the accuracy of signal.Because the zero signal that M end exports is generally the small area analysis signal of 0.01mA level or the small voltage signal of 0.001V level, if directly adopt analog quantity to carry out long range propagation, signal is easily interfered, and unstable, cannot as the foundation of product debugging at zero point.
Computing machine is by reading debugged product original output at zero point situation, controlling resistance prediction module is debugged product, resistance estimation module is according to computer instruction, corresponding valued resistor is connected to product Ra or Rb by inside modules resistor, and then according to product offset output situation of change, adjustment resistance size, until product offset output meets setting value requirement, now record offset output before debugging resistance position, resistance size, production debugging needed for this product, debug rear offset output.
Master control machine resistance estimation work station product Debugging message is handed down to successively a tin cream station, resistive patch station, resistance welded station and zero point re-measurement station.Point tin cream station, according to production debugging information, welds resistance position and completes tin cream spot printing needed for product to be debugged; Resistive patch station is chosen corresponding resistance and is affixed on corresponding debugging resistance position; Resistance welded station completes each production debugging resistance welded successively by hot air welding pattern; Product finally flows into re-measurement station at zero point, and re-measurement station carries out repetition measurement at zero point to the product after debugging.If repetition measurement result meets zero point setting requirement, then judge that this product is qualified; If repetition measurement result does not meet zero point setting requirement, this judges that this product is defective.After treating that other products of same support plate complete repetition measurement, glue applying mechanism is red point on the point of substandard product corresponding marked area automatically, represents that this product is defective.
Claims (4)
1. current sensor automatic debugging device at zero point, it is characterized in that: comprise controller, streamline, resistance estimation mechanism, point tin cream mechanism, resistive patch mechanism, resistance welded mechanism, performance repetition measurement mechanism, resistance estimation mechanism comprises resistance estimation module, resistance estimation module travel mechanism, carrier, carrier fixator, test probe, test probe, product test pad, test probe is fixed in resistance estimation module, test probe is fixed in test probe, product test pad is fixed in each test point of magnetic balance current sensor PCB, carrier fixes magnetic balance current sensor PCB, positioning carrier is fixed on streamline by carrier fixator, resistance estimation module travel mechanism moves above resistance estimation module to each test point of magnetic balance current sensor PCB, and lower general who has surrendered's test probe is connected on product test pad, resistance estimation module is carried out resistance test to magnetic balance current sensor PCB and is obtained position and resistance, a tin cream mechanism is passed to by controller, streamline moves and positioning carrier is moved on to a place of tin cream mechanism, the position point tin that some tin cream mechanism determines on magnetic balance current sensor PCB, moved by streamline again and positioning carrier is moved on to resistive patch mechanism the resistance determined is attached on magnetic balance current sensor PCB, again by streamline move positioning carrier moved on to resistance welded mechanism by resistance welded mechanism by the resistance welded after paster on magnetic balance current sensor PCB, moved by streamline again and positioning carrier is moved on to performance repetition measurement mechanism zero point repetition measurement is carried out to magnetic balance current sensor PCB, determine that whether magnetic balance current sensor PCB is qualified.
2. current sensor automatic debugging device at zero point as claimed in claim 1, is characterized in that: resistance estimation module travel mechanism is mechanical hand.
3. current sensor automatic debugging device at zero point as claimed in claim 1, it is characterized in that: in resistance estimation module, travel mechanism also arranges detent mechanism, resistance estimation module travel mechanism is by moving resistance estimation module again behind detent mechanism determination magnetic balance current sensor PCB position.
4. current sensor automatic debugging device at zero point as claimed in claim 1, is characterized in that: at performance repetition measurement mechanism also set-point gluing mechanism, and glue applying mechanism marks on the point of magnetic balance current sensor PCB substandard product corresponding marked area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN105353812A true CN105353812A (en) | 2016-02-24 |
| CN105353812B CN105353812B (en) | 2017-03-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| 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 |
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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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Address after: 315021 Zhejiang Province, Ningbo Jiangbei District Yongjiang Industrial Park No. 138 vibration Yonglu Applicant after: NINGBO CRRC TIMES SENSING TECHNOLOGY CO., LTD. Address before: 315021 Zhejiang Province, Ningbo Jiangbei District Yongjiang Industrial Park No. 138 vibration Yonglu Applicant before: Ningbo CSR Times Transducer Technique Co., Ltd. |
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