CN109917317A - Hall current sensor calibration detection apparatus and method - Google Patents
Hall current sensor calibration detection apparatus and method Download PDFInfo
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- CN109917317A CN109917317A CN201910219147.2A CN201910219147A CN109917317A CN 109917317 A CN109917317 A CN 109917317A CN 201910219147 A CN201910219147 A CN 201910219147A CN 109917317 A CN109917317 A CN 109917317A
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Abstract
The application provides a kind of Hall current sensor calibration detection apparatus and method, comprising: testboard, a reference source, current source, standard scale, data acquisition module and host computer, testboard is for carrying Hall current sensor；A reference source and host computer communication connection, PC control a reference source export one-time detection electric current；Current source is electrically connected with a reference source, the one-time detection electric current for outputting reference source；Standard scale is connected in the output circuit of current source, and standard scale is used for the size of current of measuring current source output；Standard scale and a reference source communication connection, feed back to a reference source for its measured value；Data acquisition module is used to acquire the reality output data of Hall current sensor, and the application improves the precision and detection efficiency to Hall current sensor quality testing.
Description
Technical field
This application involves Hall sensor technical field of quality detection more particularly to a kind of calibration inspections of Hall current sensor
Survey device and method.
Background technique
With the continuous development of industrial automation, more and more smart machines need to acquire data using sensor, right
The data of acquisition carry out data analysis to predict that some possible things occurred improve production to reduce disorderly closedown loss
Efficiency.Hall current sensor is a kind of magnetic field sensor made according to Hall effect, it has to magnetic-field-sensitive, structure letter
It is single, small in size, frequency response is wide, output voltage variation greatly with long service life the advantages that, it is electrical to be widely used in AC and DC
Current measurement, monitoring, the protection of route and equipment, electric energy management, electric power, communication, meteorology, railway, oil field, building, metering, electricity
Solution, industrial automation technology, detection technique and information processing etc..
The fast development of industrial automation, is substantially improved production efficiency, to propose to production, detection efficiency higher
Requirement, at present Hall current sensor in calibration and detection majority be manual operation, due to manual operation low precision, efficiency
Low, testing staff causes detection efficiency to reduce it is easy to appear fatigue, cannot be lasting on the time, and consistency difference of product etc. lacks
Point is also easy to cause missing inspection once worker-hours are too long, and personal mood, the state of mind also can be to product testing precisions
No small influence is caused with detection efficiency.
Summary of the invention
The application's is designed to provide a kind of Hall current sensor calibration detection apparatus, and the arrangement increases to Hall
The precision and detection efficiency of current sensor quality testing, reduce manual labor, reduce production cost, are suitable for difference
The product testing of model.
In order to achieve the above objectives, the application provides a kind of Hall current sensor calibration detection apparatus, comprising: testboard,
A reference source, current source, standard scale, data acquisition module and host computer, the testboard are passed for carrying Hall current to be detected
Sensor；The a reference source and the host computer communication connection, a reference source described in the PC control export one-time detection electric current；
The current source is electrically connected with a reference source, and the current source exports the one-time detection electric current of a reference source, described primary
Detection electric current is for making Hall current sensor to be detected generate Hall effect；The standard scale is connected on the defeated of the current source
Out in circuit, the standard scale is used to measure the size of current of the current source output；The standard scale and a reference source are logical
News connection, the current value measured feed back to a reference source；The data acquisition module is for acquiring the Hall current
The reality output data of sensor, the data acquisition module and the host computer communication connection, described in the host computer receives
The data of data collecting module collected.
As above, wherein parallel interval is installed with the first test section and second along its length on the testboard
Test section.
As above, wherein the current source connects primary current copper rod, the primary electricity far from one end of a reference source
Stream copper rod for penetrating in the inner hole of multiple Hall current sensors in the horizontal direction.
As above, wherein it being spaced apart on the testboard and is fixed with multiple cylinders, the cylinder is arranged along the vertical direction,
The telescopic rod of the cylinder is fixedly connected with attachment device, and the attachment device is fixedly connected with the primary current copper rod.
As above, wherein the attachment device includes upper link block and lower connecting block, and upper link block and lower connecting block are removable
Dismantle, dug into semicircle through slot on the surface that upper link block and lower connecting block are in contact with each other, the semicircle through slot of upper link block with
The corresponding setting of semicircle through slot of lower connecting block, two semicircle through slots form the through-hole that can penetrate the primary current copper rod.
As above, wherein terminal line is provided on the testboard, described terminal line one end is electrically connected with working power,
The other end with the terminal of the Hall current sensor for connecting.
The working power includes single supply and dual power supply, wherein single supply is used for and the Hall current sensor
Positive terminal connection, dual power supply with the positive terminal of the Hall current sensor and negative terminal for connecting.
It is as above, wherein the data acquisition module include it is multiple, the data acquisition module includes voltage acquisition module
And current detection module.
A kind of Hall current sensor calibration detection method, this method comprises:
S1 sets the parameter limit value of Hall current sensor: the error including setting Hall current sensor output voltage
Upper limit value, error floor value and static current of lcd limit；
S2, the value that setting passes through the one-time detection electric current of Hall current sensor；
S3 obtains the actual parameter value of Hall current sensor: obtaining Hall current sensor and is passed through one-time detection electric current
Output end voltage value afterwards, obtain Hall current sensor terminal positive static current of lcd value and/or reversed static current of lcd value and
The error amount of output end output voltage；
S4 screens rejected product, by the positive static current of lcd value and/or reversed static current of lcd value and step S1 in step S3
The static current of lcd limit of middle setting is compared, and by step S3 output voltage error value and step S1 in the mistake that sets
Poor upper limit value and error floor value are compared, and judge whether testing product is qualified product
As above, wherein the error amount of the output voltage is actual measurement output end voltage value and theoretical output voltage
The difference of value.
What the application realized has the beneficial effect that:
(1) the application testboard is when check bit detects, including two test zones, and a reference source can be tested at two
Region switching circuit electric current after the product for such as installing first test zone, is examined the product of first test zone
During survey, while the product of second test zone is installed, after the completion of the product testing of first test zone
Can the product directly to second test zone test, wherein check bit, which includes: 32, (indicates that the area A can place Hall electricity
The quantity of flow sensor)+32 (indicating that the area B can place the quantity of Hall current sensor) when, amount to 64 check bits, save
The time of second test zone product of installation, improve product detection efficiency, 1 hour detectable 350-400 Hall electricity
Flow sensor, speed are 20-25 times of worker.
(2) the application is suitable for the Hall current sensor of different model specification.
(3) output end of the application current source is in series with standard scale, and standard scale is equivalent to a powerful Multifunctional multi
With table, for the accurate measurement of DC current, the current output value that standard scale is measured feeds back to a reference source, if feedback
When current value differs larger with the current output value of standard, then the current output value of a reference source is reset by host computer, is mentioned
The output accuracy of high current, to improve the detection accuracy of Hall current sensor.
(4) current detection module of the application can detecte the size of Hall current sensor product operating current, will be real
Border size of current is compared with the static current of lcd limit value of setting, judges that whether there is short circuit for Hall current sensor interiors of products
Or open circuit.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application can also be obtained according to these attached drawings other attached for those skilled in the art
Figure.
Fig. 1 is a kind of schematic diagram of Hall current sensor calibration detection apparatus of the present invention.
Fig. 2 is the flow chart that a kind of Hall current sensor of the present invention calibrates detection method.
Fig. 3 is a kind of wiring diagram of the Hall current sensor of Hall current sensor calibration detection apparatus of the present invention.
Fig. 4 is a kind of scheme of installation of the primary current copper rod of Hall current sensor calibration detection apparatus of the present invention.
Fig. 5 is a kind of front view of Hall current sensor calibration detection apparatus of the present invention.
Fig. 6 is a kind of top view of Hall current sensor calibration detection apparatus of the present invention.
Appended drawing reference: 10- a reference source, 11- current source, 12- standard scale, 13- Hall current sensor, 14- working power,
15- data acquisition module, 16- host computer, 31- primary current copper rod, 41- cylinder, 42- attachment device, the upper link block of 43-, 44-
Lower connecting block, 51- testboard, the first test section 71-, the second test section 72-, 131- inner hole.
Specific embodiment
Below with reference to the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Ground description, it is clear that described embodiment is some embodiments of the present application, instead of all the embodiments.Based on the application
In embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the range of the application protection.
As shown in Figure 1, the application provides a kind of Hall current sensor calibration detection apparatus, comprising: testboard 51 is (as schemed
Shown in 5 and Fig. 6), a reference source 10, current source 11, standard scale 12, data acquisition module 15 and host computer 16, when to be detected, surveying
Test stand 51 is disposed with multiple Hall current sensors to be detected 13, and multiple Hall current sensors 13 are electric with working power 14
Connection；A reference source 10 and 16 communication connection of host computer, host computer 16 control a reference source 10 and export one-time detection electric current；Current source 11
Be electrically connected with a reference source 10, for the one-time detection electric current in outputting reference source 10, one-time detection electric current by be passed through it is to be detected suddenly
That current sensor, makes Hall current sensor to be detected generate Hall effect；Standard scale 12 is connected on the output of current source 11
In circuit, standard scale 12 is used for the size of current that measuring current source 11 exports；Standard scale 12 and 10 communication connection of a reference source, by it
The current value of measurement feeds back to a reference source 10；Data acquisition module 15 is electrically connected with the output end of Hall current sensor 13, is used
In the reality output data of acquisition Hall current sensor 13, data acquisition module 15 and 16 communication connection of host computer, host computer
16 receive the data that data acquisition module 15 acquires.
Specifically, a reference source 10 is the DC reference source of 200A, it is possible to provide the DC reference electric current of 0-200A, standard scale 12
With 10 communication connection of a reference source, it should be appreciated that standard scale is the equal of the multimeter of a large power multifunctional, for straight
The accurate measurement of galvanic electricity stream, what standard scale 12 was measured exports current feedback to a reference source 10, a reference source 10 and host computer 16
Carry out two-way communication, host computer 16 according to a reference source 10 receive standard scale 12 feed back size of current, if the electric current of the detection with
The one-time detection current value error of setting is more than certain range, then resets the one of the output of a reference source 10 by host computer 16
Secondary detection electric current, the precision for exporting one-time detection electric current reach 0.02 grade -0.05 grade, that is, guarantee what current source 11 exported
The difference of one-time detection current value and the one-time detection current value of setting improves product testing precision in the error range of permission
With the accuracy of detection.
Specifically, host computer 16 is communicated with a reference source 10, communication modes are RS232Modbus communication, host computer 16
With RS232 interface, RS232 interface is converted by RS485 interface by converter and carries out long range high-speed communication, and used
DL645-2007 communications protocol.According to the Hall current sensor of the testing requirements of client and different model, on host computer 16
Output calibration current value, set of currents number, output current value and the error amount of a reference source 10 can be set, and then meets client to product
Quality requirement.
Specifically, host computer 16 is communicated with data acquisition module 15, communication modes are RS232Modbus communication, on
Position machine 16 has RS232 interface, and RS232 interface is converted into RS485 interface to realize long range high-speed communication by converter,
And DL645-2007 communications protocol is used, it is electric in its power consumption that host computer 16 obtains each product that data acquisition module 15 acquires
Voltage output value when flow valuve, current point, and actual voltage output value is compared with standard value, it is defeated according to virtual voltage
Whether qualified the difference between value and standard value judges product whether in the error range of setting out, and indicates unqualified
Product.
As shown in fig. 6, parallel interval is installed with the first test section 71 and the second survey along its length on testboard 51
Area 72 is tried, when carrying out product testing, is spaced installation product (namely Hall current sensor 13) in the first test section 71 first,
During detecting to the product in the first test section 71, while product is installed (also in interval in the second test section 72
It is Hall current sensor 13), it, can be directly in the second test section 72 after the completion of the product testing in the first test section 71
Product is detected, and is saved the time of product in the second test section 72 of installation, is improved the detection efficiency of product.
Specifically, multiple Hall current sensors 13 in the first test section 71 are arranged in same rectilinear direction, the
Multiple Hall current sensors 13 of two test sections 72 are arranged in same rectilinear direction, and each Hall current sensor 13
Between it is spaced apart.
As shown in figure 3, a specific embodiment according to the present invention, current source 11 connects one far from one end of a reference source 10
Primary current copper rod 31, primary current copper rod 31 penetrates the inner hole 131 of multiple Hall current sensors 13, so that one-time detection electric current
It is passed through Hall current sensor to be detected.
Specifically, the first test section 71 be equipped with a primary current copper rod 31, the primary current copper rod 31 also cross
The inner hole 131 of multiple Hall current sensors 13 in first test section 71, primary current copper rod 31 are passed along multiple Hall currents
The orientation of sensor 13 is arranged, and also is provided with a primary current copper rod 31 in the second test section 72, set-up mode with the
The set-up mode of primary current copper rod 31 in one test section 71 is identical.
As Figure 4-Figure 6, it is spaced apart on testboard 51 and is fixed with multiple cylinders 41, cylinder 41 is arranged along the vertical direction, gas
The telescopic rod of cylinder 41 is fixedly connected with attachment device 42, and attachment device 42 is fixedly connected with primary current copper rod 31, attachment device
42 include upper link block 43 and lower connecting block 44, upper link block 43 and lower connecting block 44 is removable dismantles, upper link block 43 and lower company
It connects and has dug into semicircle through slot on the surface that block 44 is in contact with each other, the semicircle through slot of upper link block 43 and the semicircle of lower connecting block 44
The corresponding setting of through slot, two semicircle through slots form the through-hole that can penetrate primary current copper rod 31, and the through-hole is for fixed primary
Electric current copper rod 31.
Specifically, primary current copper rod 31 is first penetrated row's Hall current sensor when installation primary current copper rod 31
In 13 inner hole 131, then upper link block 43 is separated from lower connecting block 44, primary current copper rod 31 is put into semicircle through slot
It is interior, then upper link block 43 is fixedly connected to fix primary current copper rod 31 with lower connecting block 44, starts cylinder 41, telescopic rod
It stretches out, drives attachment device 42 and primary current copper rod 31 mobile, and then adjust the height of primary current copper rod 31, be located at
Detection accuracy is improved at the center of inner hole 131.Since 131 height of inner hole of the Hall current sensor 13 of different model is different, because
This is located at the center of inner hole 131, to improve Hall current sensor by adjusting the height of primary current copper rod 31
Actual output voltage precision, improve error precision, and then improve product quality detection accuracy.
A specific embodiment according to the present invention is provided with terminal line, terminal line one end and work electricity on testboard 51
Source 14 is electrically connected, and when detection, the other end of terminal line is electrically connected with the terminal of Hall current sensor 13 to be detected, specifically
, the multiple Hall current sensors 13 being arranged on testboard 51 are connected in the same working power 14 by terminal line,
The positive grade of power supply and power supply cathode of working power 14 pass through terminal line respectively and two of Hall current sensor 13 positive and negative extreme
Son connection, and then operating current is provided to Hall current sensor 13.
Working power 14 includes single supply and dual power supply, wherein single supply is used for the Hall current sensor just
Extreme son connection, dual power supply with the positive terminal of the Hall current sensor and negative terminal for connecting.
Specifically, the terminal of single supply is defined as: 1 ,+12V；2,GND；3, OUT (output is 2.5 ± 2V)；4,GND；It is double
The terminal of power supply is defined as 1 ,+12V；2, -12V；3, OUT (output is 0 ± 4V)；4,GND；Testboard 51 is by two kinds of work electricity
Source 14 can be applicable in design.We, which just take away -12V power end, when single supply prevents short circuit.
For data acquisition module 15 including multiple, data acquisition module 15 includes voltage acquisition module, each Hall current
Sensor is correspondingly connected with a voltage acquisition module, and the voltage that voltage acquisition module is used to acquire Hall current sensor output is big
It is small.
Data acquisition module 15 further includes current detection module, is connected in each Hall current sensor and working power 14
It is connected with current detection module at the terminal connect, for detecting the size of current at the terminal.
As shown in figure 3, for working power 14, the wiring diagram of data acquisition module 15 and two Hall current sensors 13,
Remaining Hall current sensor 13 is carried out according to the mode of connection shown in Fig. 3 and working power 14 and data acquisition module 15
Wiring.
As shown in Fig. 2, a kind of Hall current sensor calibrates a specific embodiment of detection method according to the present invention:
Scenario Name is single supply 50A, and the size of the one-time detection electric current used is 50A, the model of the Hall current sensor of detection
For SKHK1-50A/2V, equipment installation places Hall current sensor, by working power and data acquisition module on testboard
It is connected on the terminal of Hall current sensor.
Specifically, being installed first to the Hall current sensor of the first test section, then suddenly to the second test section
You are installed current sensor.
Power supply is opened, including opens benchmark source current and working power.
Hall is installed, primary current copper rod is passed into the inner hole of Hall current sensor, specifically, manually will be primary
Electric current copper rod passes through the inner hole of Hall current sensor, then primary current copper rod is fixed on to the connection dress being arranged on testboard
It sets, attachment device lifting is driven by cylinder, to adjust the height of primary current copper rod, guarantee that primary current copper rod is located at
The center of inner hole, the electric current for flowing through primary current copper rod (current-carrying conductor) is primary current, and primary current is in primary current copper rod
Four weekly assemblies generate a magnetic field, the size in magnetic field is directly proportional to primary current, magnetic field energy by primary current copper rod aggregation simultaneously
It senses on Hall current sensor, Hall current sensor output voltage signal, the size and primary current of the voltage signal
It is directly proportional with the product of magnetic flux density, by Hall voltage (the i.e. Hall current sensor for measuring Hall current sensor both ends
Both ends output voltage value) size measure the size for flowing through current-carrying conductor electric current indirectly.
Specific detection method is as follows:
S1 sets the parameter limit value of Hall current sensor: the error including setting Hall current sensor output voltage
Limit value (the error upper limit value and error floor value of Hall current sensor output voltage), static current of lcd limit can also include
Theoretical output voltage values etc.；
Static current of lcd limit is set as 20mA, and static current of lcd limit indicates power consumption when Hall current sensor work；
The specified output voltage of Hall current sensor is 10V, and output end is connected with load, and load is greater than 10K Ω, institute
It is less than 1mA to flow through the electric current of load, the current drain of Hall current sensor is usually required that less than 20mA, that is, requires function
Consume limit 20mA.
Further, the corresponding error upper limit of Hall current sensor, error floor and the reason of different electric current multiples are set
By output valve, and set the number of sampling and the interval time of sampling such as table 1.
Table 1
S2 sets the value of one-time detection electric current, sets test parameters, and test parameters information is inputted on host computer；
Specifically, test parameters setting is included in, the enterprising luggage of host computer sets parameter setting and test parameter is arranged and protects
Deposit the data of setting.
Specifically, setting device parameter includes: that PORT COM is set as COM1, which is host computer and a reference source
PORT COM, according to the difference of specific PORT COM, settable different port；Epitope number is set as 64, the number of the setting
It is worth identical as the total quantity of Hall current sensor on testboard；Standard scale is set as HS5103C, that is, selection and current source
The model of the standard scale of connection；Test parameter setting: default error number is set as 2,3 or 4；
Further, the setting that epitope number is carried out to each Hall current sensor, specifically, setting each Hall current
The one-time detection current value and output voltage values of sensor.If table 2 is to set epitope number, defeated to first four Hall current sensor
Enter current value, accuracy class, output voltage and the region (test section i.e. in table 2 for setting measured Hall current sensor
Domain), wherein input current value is the size of one-time detection electric current, and accuracy class is the electric current output that standard scale controls current source
Grade, output voltage are expressed as the standard output voltage value of Hall current sensor, all to other according to the setting value in table 2
Hall current sensor carry out parameter setting, that is, set corresponding epitope number, defeated to all Hall current sensor
Enter that current value is 50A, accuracy class 0.02, output voltage are 2V and test zone is A, if Hall current sensor setting is the
One test section, test zone can be set as A, if Hall current sensor is arranged in the second test section, test zone can be set
It is set to B, in addition, client can set different parameters according to their own needs.
Table 2
S3, obtains the actual parameter value of Hall current sensor: Hall current sensor is according to Hall effect principle by one
Secondary detection current transformation is output end voltage signal, obtains the output end electricity that Hall current sensor is passed through after one-time detection electric current
Pressure value, the positive static current of lcd value and/or reversed static current of lcd value and output end output electricity of acquisition Hall current sensor terminal
The error amount of pressure；
Test data is obtained, after the completion of parameter setting, starts test software in the prior art and obtains on computers and adopt
Collect the data of module acquisition, to obtain test data, the data that data acquisition module is acquired are output on host computer, on
The data of the display interface display acquisition of position machine.As shown in table 3, test data includes positive static current of lcd, reversed static current of lcd
And error amount.Specific forward direction static current of lcd and reversed static current of lcd are obtained by data acquisition module, and error amount is Hall current
The difference of the actually detected voltage value of sensor and theoretical output voltage values.
For example, obtaining the test data such as table 3 of epitope number 0002, other data, the present embodiment goes out with regard to different an example:
Table 3
Wherein, positive static current of lcd refers to power consumption of the Hall current sensor at positive terminal in table 3, for example,+
Power consumption at 12V, reversed static current of lcd refers to power consumption of the Hall current sensor at negative terminal, for example, at -12V
Power consumption, reversed static current of lcd is not no electric current for single supply theory.
S4 screens rejected product, that is, rejected product and qualified product is classified, and picks out rejected product as useless
The parameter limit value set in actual parameter value and step S1 in step S3 is compared by product, judge testing product whether be
Qualified product, if in the parameter limits that the actual parameter value in step S3 is set in step sl, the product of the detection is
Qualified product.
Specifically, by step S3 positive static current of lcd value and/or reversed static current of lcd value and step S1 in set
Static current of lcd limit is compared, and by step S3 output voltage error value and step S1 in the error upper limit value that sets
It is compared with error floor value, judges whether testing product is qualified product.If positive static current of lcd value and/or reversed power consumption electricity
Flow valuve be less than static current of lcd limit, then Hall current sensor interiors of products have do not open a way and short circuit；If output voltage error value
Within the scope of the error upper limit value and error floor value of setting, then the product is qualified product.
Wherein, the error amount of the output voltage is the difference of actual measurement output end voltage value and theoretical output voltage values
Value.
The voltage error value for calculating virtual voltage error measuring value and theoretical value, by the permission of actual error amount and setting
Error range is compared, if actual error amount, within the scope of allowable error, which is qualified product, no
It then, is rejected product.
Specifically, on the one hand, more positive static current of lcd and reversed static current of lcd whether Hall current sensor function
Consume in quota limit, the power consumption limit that the present embodiment set as 20mA (being shown in Table 1), positive static current of lcd in table 3 with reversely
Static current of lcd is respectively less than the power consumption limit 20mA set, therefore the static current of lcd in table 3 is qualified, for example, to first in table 3
Group data are compared, and positive static current of lcd is 16.2325mA, and 16.2325mA is less than 20mA, can obtain, which conforms to
It asks, it is otherwise, undesirable；Reversed static current of lcd is 1.114mA, is less than 20mA by 1.114mA, can obtain, which meets
It is required that otherwise, it is undesirable.Positive static current of lcd and reversed static current of lcd indicate that product is normal in power consumption quota limit,
Interiors of products is not opened a way and short circuit.
On the other hand, the allowable error lower limit and the error upper limit set to the error amount measured in table 3 with such as table 1 compares
Compared with, for example, be compared to first group of data in table 3, error is -0.0084, the error floor set in table 1 as -0.01,
The error upper limit is 0.002, and by -0.01 < -0.0084 < 0.002, therefore, error -0.0084 meets in the error range of permission
It is required that otherwise, it is undesirable, in conclusion if positive static current of lcd, reversed static current of lcd and error amount are in allowed band
Interior, then the product detected is qualified product, is rejected product, the Hall current sensor that above-mentioned epitope number is 0002 is conjunction otherwise
Lattice product.According to above-mentioned principle, whether qualified other Hall current sensors are successively detected.
According to other embodiments of the invention, using size of current is the one-time detection electric current of 100A to model SKHK2-
The Hall current sensor of 100A/2V is tested, and using size of current is the one-time detection electric current of 200A to model
The Hall current sensor of SKHK4-100A/2V is tested, and the Hall current of test method and detection SKHK1-50A/2V pass
Sensor it is identical.
What the application realized has the beneficial effect that:
(1) the application testboard is when check bit detects, including two test zones, and a reference source can be tested at two
Region switching circuit electric current after the product for such as installing first test zone, is examined the product of first test zone
During survey, while the product of second test zone is installed, after the completion of the product testing of first test zone
Can the product directly to second test zone test, wherein check bit, which includes: 32, (indicates that the area A can place Hall electricity
The quantity of flow sensor)+32 (indicating that the area B can place the quantity of Hall current sensor) when, amount to 64 check bits, save
The time of second test zone product of installation, improve product detection efficiency, 1 hour detectable 350-400 Hall electricity
Flow sensor, speed are 20-25 times of worker.
(2) the application is suitable for the Hall current sensor of different model specification.
(3) output end of the application current source is in series with standard scale, and standard scale is equivalent to a powerful Multifunctional multi
With table, for the accurate measurement of DC current, the current output value that standard scale is measured feeds back to a reference source, if feedback
When current value differs larger with the current output value of standard, then the current output value of a reference source is reset by host computer, is mentioned
The output accuracy of high current, to improve the detection accuracy of Hall current sensor.
(4) current detection module of the application can detecte the size of Hall current sensor product operating current, will be real
Border size of current is compared with the static current of lcd limit value of setting, judges that whether there is short circuit for Hall current sensor interiors of products
Or open circuit.
Claims (10)
1. a kind of Hall current sensor calibration detection apparatus characterized by comprising testboard, a reference source, current source, mark
Quasi- table, data acquisition module and host computer,
The testboard is for carrying Hall current sensor to be detected；
The a reference source and the host computer communication connection, a reference source described in the PC control export one-time detection electric current；
The current source is electrically connected with a reference source, and the current source exports the one-time detection electric current of a reference source, described
One-time detection electric current is for making Hall current sensor to be detected generate Hall effect；
The standard scale is connected in the output circuit of the current source, and the standard scale is used to measure the current source output
Size of current；The standard scale and a reference source communication connection, the current value measured feed back to a reference source；
The data acquisition module is used to acquire the reality output data of Hall current sensor, the data acquisition module and institute
Host computer communication connection is stated, the host computer receives the data of the data collecting module collected.
2. Hall current sensor calibration detection apparatus according to claim 1, which is characterized in that edge on the testboard
Its length direction parallel interval is installed with the first test section and the second test section.
3. Hall current sensor calibration detection apparatus according to claim 1, which is characterized in that the current source is separate
One end of a reference source connects primary current copper rod, and the primary current copper rod is multiple to be detected for penetrating in the horizontal direction
In the inner hole of Hall current sensor.
4. Hall current sensor calibration detection apparatus according to claim 3, which is characterized in that between on the testboard
It separating and is fixed with multiple cylinders, the cylinder is arranged along the vertical direction, and the telescopic rod of the cylinder is fixedly connected with attachment device,
The attachment device is fixedly connected with the primary current copper rod.
5. Hall current sensor calibration detection apparatus according to claim 4, which is characterized in that the attachment device packet
Include link block and lower connecting block, upper link block and lower connecting block is removable dismantles, what upper link block and lower connecting block were in contact with each other
Dig into semicircle through slot on surface, the semicircle through slot of upper link block and the corresponding setting of the semicircle through slot of lower connecting block, two
Semicircle through slot forms the through-hole that can penetrate the primary current copper rod.
6. Hall current sensor calibration detection apparatus according to claim 1, which is characterized in that set on the testboard
It is equipped with terminal line, described terminal line one end is electrically connected with working power, and the other end is for the end with the Hall current sensor
Son electrical connection.
7. Hall current sensor calibration detection apparatus according to claim 6, which is characterized in that the working power packet
Include single supply and dual power supply, wherein for connecting with the positive terminal of the Hall current sensor, dual power supply is used for single supply
It is connect with the positive terminal of the Hall current sensor and negative terminal.
8. Hall current sensor calibration detection apparatus according to claim 1, which is characterized in that the data acquisition module
Block include it is multiple, the data acquisition module includes voltage acquisition module and current detection module.
9. a kind of Hall current sensor calibrates detection method automatically, which is characterized in that this method comprises:
S1 sets the parameter limit value of Hall current sensor: the error upper limit including setting Hall current sensor output voltage
Value, error floor value and static current of lcd limit；
S2, the value that setting passes through the one-time detection electric current of Hall current sensor；
S3 obtains the actual parameter value of Hall current sensor: after acquisition Hall current sensor is passed through one-time detection electric current
Output end voltage value, the positive static current of lcd value and/or reversed static current of lcd value of acquisition Hall current sensor terminal and output
Hold the error amount of output voltage；
S4, screen rejected product, by step S3 positive static current of lcd value and/or reversed static current of lcd value and step S1 in set
Fixed static current of lcd limit is compared, and by step S3 output voltage error value and step S1 in the error that sets
Limit value and error floor value are compared, and judge whether testing product is qualified product.
10. a kind of Hall current sensor according to claim 9 calibrates detection method automatically, which is characterized in that described
The error amount of output voltage is the difference of actual measurement output end voltage value and theoretical output voltage values.
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