CN109407027A - Large range high precision current sensor metering method - Google Patents
Large range high precision current sensor metering method Download PDFInfo
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- CN109407027A CN109407027A CN201811388669.7A CN201811388669A CN109407027A CN 109407027 A CN109407027 A CN 109407027A CN 201811388669 A CN201811388669 A CN 201811388669A CN 109407027 A CN109407027 A CN 109407027A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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Abstract
The present invention relates to sensor element fields, in particular to a kind of large range high precision current sensor metering method, large range high precision current sensor metering method is by will export electric current after two current sources parallel connections, to increase the range and precision of the metering of range high precision electric current transducer.Large range high precision current sensor is given by exporting electric current after two current sources parallel connections, complete the metering to large range high precision current sensor, Calibrated current sensor is frequently replaced when to avoid measuring large range high precision current sensor, increases the metering range and precision of large range high precision current sensor.
Description
Technical field
The present invention relates to sensor element fields, measure in particular to a kind of large range high precision current sensor
Method.
Background technique
When measuring to large range high precision current sensor, the current sensor of a calibration, precision are needed
And range needs to be greater than large range high precision current sensor to be batched, therefore, when to a large range high precision electric current
When sensor is measured from milliampere grade to several hundred peaces, need ceaselessly to replace the current sensor of calibration.
How to solve the above problems, is urgently to be resolved at present.
Summary of the invention
The object of the present invention is to provide a kind of large range high precision current sensor metering methods.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
The embodiment of the invention provides a kind of large range high precision current sensor metering method, the large range high precisions
Current sensor metering method is by will export electric current after two current sources parallel connections, to increase in terms of range high precision electric current transducer
The range and precision of amount.
In preferred embodiments of the present invention, two current sources the are exported electric current method after in parallel includes:
Two current sources are the same as mutually output；
Detect the size of current of two current sources output；
High precision electric current transducer detects the size of current after parallel output；
The sum of the size of current of two current sources output is compared with the size of current after parallel output, is completed a large amount of
The metering of journey high precision electric current transducer.
In preferred embodiments of the present invention, the method for the size of current of the detection two current sources output passes through calibration
Current sensor is realized.
In preferred embodiments of the present invention, two current sources the are exported electric current method after in parallel includes:
Two current sources reversely export；
Detect the size of current of two current sources output；
High precision electric current transducer detects the size of current after parallel output；
The absolute value of the difference of the size of current of two current sources output is compared with the size of current after parallel output,
Complete the metering of large range high precision current sensor.
In preferred embodiments of the present invention, the method for the size of current of the detection two current sources output passes through calibration
Current sensor is realized.
Compared with the existing technology, the embodiment of the present invention has the advantages that
The embodiment of the invention provides a kind of large range high precision current sensor metering method, the large range high precisions
Current sensor metering method is by will export electric current after two current sources parallel connections, to increase in terms of range high precision electric current transducer
The range and precision of amount.Large range high precision current sensor is given by exporting electric current after two current sources parallel connections, is completed to big
The metering of range high precision electric current transducer, to frequently be replaced when avoiding measuring large range high precision current sensor
Calibrated current sensor increases the metering range and precision of large range high precision current sensor.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 shows the part process of large range high precision current sensor metering method provided by the embodiment of the present invention
Schematic diagram.
Fig. 2 shows another part of large range high precision current sensor metering method provided by the embodiment of the present invention
Flow diagram.
Fig. 3 shows the structural frames of large range high precision current sensor metering device provided by the embodiment of the present invention
Figure.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Embodiment
The embodiment of the invention provides a kind of large range high precision current sensor metering methods.The large range high precision
Current sensor metering method is by will export electric current after two current sources parallel connections, to increase in terms of range high precision electric current transducer
The range and precision of amount.Large range high precision current sensor is given by exporting electric current after two current sources parallel connections, is completed to big
The metering of range high precision electric current transducer, to frequently be replaced when avoiding measuring large range high precision current sensor
Calibrated current sensor increases the metering range and precision of large range high precision current sensor.
Referring to Fig. 1, two current sources the are exported electric current method after in parallel includes the following steps:
S110: two current sources are the same as mutually output.
In the present embodiment, two current sources are with mutually exporting, to improve the maximum range of output electric current.
S120: the size of current of detection two current sources output.
In the present embodiment, the method for the size of current of two current sources of detection output passes through Calibrated current sensor
It realizes.
S130: high precision electric current transducer detects the size of current after parallel output.
S140: the sum of the size of current of two current sources output is compared with the size of current after parallel output, complete
It is measured at large range high precision current sensor.
Referring to Fig. 2, two current sources the are exported electric current method after in parallel is further comprising the steps of:
S210: two current sources reversely export；
In the present embodiment, two current source anti-phase outputs, to improve the minimum range of output electric current.
S220: the size of current of detection two current sources output.
In the present embodiment, the method for the size of current of two current sources of detection output passes through Calibrated current sensor
It realizes.
S230: high precision electric current transducer detects the size of current after parallel output；
S240: the size of current after the absolute value of the difference and parallel output of the size of current of two current sources output is carried out
It compares, completes the metering of large range high precision current sensor.
Referring to Fig. 3, the embodiment of the invention also provides a kind of large range high precision current sensor metering devices.Largely
Journey high precision electric current transducer metering device includes two current sources；And by the way that electric current will be exported after two current sources parallel connections, with
Expand the range and precision of the metering of large range high precision current sensor metering device.By will be exported after two current sources parallel connections
Electric current expands the metering range of large range high precision current sensor metering device, to large range high precision current sense
The current sensor of device metering device no replacement is required calibration, when metering, is convenient and efficient, practical.Wide range provided by the invention
The metering method of high precision electric current transducer can be carried out real by above-mentioned large range high precision current sensor metering device
It is existing.
Current direction in Fig. 3 is defined:
In Fig. 3 the current direction of current source to the left when be positive, to the right when be negative.
When two current sources export in the same direction, i.e., when current direction is all positive or is all negative, by Kirchhoff's law it is found that
The electric current for flowing into large range high precision current sensor is that two current sources export the sum of electric current, so that it is high-precision to expand a large amount of dirt
Spend the range of current sensor metering device；When two current sources reversely export, i.e., two sense of current one be positive it is another
It is a when being negative, by Kirchhoff's law it is found that the electric current for flowing into large range high precision current sensor is that two current sources are defeated
Difference between currents out, to improve the precision of a large amount of dirt high precision electric current transducer metering devices.
In the present embodiment, the large range high precision current sensor metering device further includes two Calibrated current sensings
Device；Two current sources respectively with after a Calibrated current sensor parallel with the large range high precision current sense
Device is connected in series；Two Calibrated current sensors are adapted to detect for the size of current of the current source output of series connection with it；It is described
Large range high precision current sensor be adapted to detect for the size of the electric current exported after two current sources are in parallel and with two marks
The size of current that constant current sensor detects is compared, to complete to measure large range high precision current sensor.Two
When a current source exports in the same direction, large range high precision current sensor is adapted to detect for the electric current exported after two current sources are in parallel
Size and the sum of the electric current detected with two Calibrated current sensors is compared；When two current sources reversely export,
Large range high precision current sensor be adapted to detect for the size of the electric current exported after two current sources are in parallel and with two marks
The absolute value for the difference between currents that constant current sensor detects is compared.
In conclusion the embodiment of the invention provides a kind of large range high precision current sensor metering methods by by two
Electric current is exported after a current source is in parallel, to increase the range and precision of the metering of range high precision electric current transducer.Pass through two electricity
Electric current is exported after stream source is in parallel and gives large range high precision current sensor, completes the meter to large range high precision current sensor
Amount increases big to frequently replace Calibrated current sensor when avoiding measuring large range high precision current sensor
The metering range and precision of range high precision electric current transducer.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of large range high precision current sensor metering method, which is characterized in that
The large range high precision current sensor metering method is by will export electric current after two current sources parallel connections, with incrementss
The range and precision of journey high precision electric current transducer metering.
2. large range high precision current sensor metering method as described in claim 1, which is characterized in that
It is described that by two current sources, the method for output electric current includes: after in parallel
Two current sources are the same as mutually output；
Detect the size of current of two current sources output；
High precision electric current transducer detects the size of current after parallel output；
The sum of the size of current of two current sources output is compared with the size of current after parallel output, it is high to complete wide range
The metering of precision current sensor.
3. large range high precision current sensor metering method as claimed in claim 2, which is characterized in that
The method of the size of current of the detection two current sources output is realized by Calibrated current sensor.
4. large range high precision current sensor metering method as described in claim 1, which is characterized in that
Two current sources are exported into the electric current method after in parallel further include:
Two current sources reversely export；
Detect the size of current of two current sources output；
High precision electric current transducer detects the size of current after parallel output；
The absolute value of the difference of the size of current of two current sources output is compared with the size of current after parallel output, is completed
The metering of large range high precision current sensor.
5. large range high precision current sensor metering method as claimed in claim 4, which is characterized in that
The method of the size of current of the detection two current sources output is realized by Calibrated current sensor.
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| CN201811388669.7A CN109407027A (en) | 2018-11-21 | 2018-11-21 | Large range high precision current sensor metering method |
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