CN105510686A - Current measurement apparatus and method - Google Patents
Current measurement apparatus and method Download PDFInfo
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- CN105510686A CN105510686A CN201510926629.3A CN201510926629A CN105510686A CN 105510686 A CN105510686 A CN 105510686A CN 201510926629 A CN201510926629 A CN 201510926629A CN 105510686 A CN105510686 A CN 105510686A
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- current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)
Abstract
The invention provides a current measurement apparatus and method. A coil in a multi-measuring-range Hall current sensor is connected in parallel with a coil in a Hall current sensor, currents to be measured are measured through selection of any one measuring range in the multi-measuring-range Hall current sensor, and the currents to be measured pass through the Hall current sensor. If the currents to be measured are connected with any one measuring range of the multi-measuring-range Hall current sensor for measurement, voltage values when the currents to be measured are connected with any one measuring range of the multi-measuring-range Hall current sensor for measurement and voltage values when the currents to be measured flow through the Hall current sensor are measured, then according to a Hall effect, corresponding current values under each measuring range of the multi-measuring-range Hall current sensor and current values measured by the Hall current sensor are converted, and the converted current values measured by the Hall sensor current are taken as reference current values.
Description
Technical field
The present invention relates to electronic information field, more specifically, relate to a kind of current measuring device and method.
Background technology
The device of general measurement electric current needs a selected suitable range when utilizing Hall element to measure, to obtain more accurate measured value, if also have than access measurement range more accurate range time, often need again to change a more accurate range, user often needs first to obtain measurement result, then judge whether that the range accessed is best range according to measurement result, if not, also need user again to connect to change range to measure again, the time cycle that repeated measurement selects suitable range to cause user to obtain the precision current value of oneself needs is elongated greatly, make the operation more complicated of current measurement simultaneously, intelligent not.
Summary of the invention
The invention provides a kind of current measuring device and method, solve the problem that the operation of existing current measuring device is more complicated.
Another object of the present invention is to provide a kind of current measuring method.
In order to reach above-mentioned technical purpose, technical scheme of the present invention is as follows:
A kind of current measuring device, comprises Hall current sensor, multirange Hall current sensor, electric current scaler and current value comparison device;
The range of described Hall current sensor is the maximum range of described current measuring device, and electric current to be measured converts voltage to by described Hall current sensor;
Described multirange Hall current sensor comprises two or more ranges, electric current to be measured converts corresponding voltage to by the corresponding range in described multirange Hall current sensor, described multirange Hall current sensor interior loop and described Hall current sensor interior loop are connected in parallel, use any range in described multirange Hall current sensor to treat and survey electric current when measuring, electric current to be measured is by described Hall current sensor, if electric current to be measured is measured by described Hall current sensor, then electric current to be measured is only through described Hall current sensor,
The size of described voltage is converted into current value according to Hall effect by described electric current scaler, the current value that the size that described Hall current sensor converts voltage to is converted into is as reference current value, measure if electric current to be measured connects described Hall current sensor, then obtain the voltage corresponding with electric current to be measured, directly convert according to Hall effect and obtain the current value of electric current to be measured, if use any range in described multirange Hall current sensor to treat survey electric current to measure, described in described electric current scaler also exports described voltage large young pathbreaker according to described multirange Hall current sensor, each range of multirange Hall current sensor converts out by current value during electric current to be measured,
Described current value comparison device described each range of multirange Hall current sensor obtained that converted by described electric current scaler is compared by current value during electric current to be measured and described reference current value, selects current value closest to described reference current value as measuring the current value obtained.
Further, also comprise outrange judgment means, described outrange judgment means is used for when the current value that electric current scaler converts out exceeds corresponding connection range, and described outrange judgment means judges that electric current to be measured connects outrange.
Further, two or more ranges in the range of described Hall current sensor and described multirange Hall current sensor successively decrease successively with prearranged multiple relation.
Further, described Hall current sensor measures the range of electric current is 50A.
Further, described prearranged multiple is 5 times.
A kind of current measuring method, comprises step:
Preset the range of Hall current sensor and multirange Hall current sensor, and to set described Hall current sensor range be maximum range, described multirange Hall current sensor has two or more ranges, described multirange Hall current sensor interior loop and described Hall current sensor interior loop are connected in parallel, connect any range treat survey electric current measure;
Measure if electric current to be measured connects described Hall current sensor, then obtain the voltage corresponding with electric current to be measured, directly convert according to Hall effect and obtain the current value of electric current to be measured, if electric current to be measured connects described multirange Hall current sensor, any range is measured, then obtain electric current to be measured and connect corresponding voltage value that any range of described multirange Hall current sensor carries out measuring and the electric current to be measured magnitude of voltage through described Hall current sensor;
Convert according to Hall effect and draw the current value of the range be connected with by described multirange Hall current sensor by the current value of the electric current to be measured of described Hall current sensor, the current value that the described Hall current sensor drawn converting is measured as reference current value, and connects according to electric current to be measured the current value that magnitude of voltage that any range of described multirange Hall current sensor obtains converses the electric current to be measured that each range passes through in described multirange Hall current sensor;
Current value and the described reference current value of the electric current to be measured passed through by each range in the described multirange Hall current sensor that draws of converting are compared, and select current value closest to described reference current value as measuring the current value obtained.
Further, when described corresponding current value and described reference current value being compared, also comprise step: when the current value that electric current scaler converts out exceeds corresponding connection range, described outrange judgment means judges that electric current to be measured connects outrange.
Further, two or more ranges set in the range of described Hall current sensor and described multirange Hall current sensor successively decrease successively with prearranged multiple relation.
Further, determine that the maximum measurement range measuring electric current is 50A.
Further, determine that described prearranged multiple is 5 times.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
Above-mentioned current measuring device and method, be connected in parallel by multirange Hall current sensor interior loop and described Hall current sensor interior loop, electric current to be measured is selected when any range is measured in described multirange Hall current sensor, electric current to be measured is through described Hall current sensor.If electric current to be measured connects described multirange Hall current sensor, any range is measured, then measure and obtain electric current to be measured and connect magnitude of voltage that any range of described multirange Hall current sensor carries out measuring and the electric current to be measured magnitude of voltage through described Hall current sensor, convert according to Hall effect and obtain the current value that corresponding current value under each range of multirange Hall current sensor and described Hall current sensor measurements obtain, the current value of the described Hall current sensor measurement drawn converting is as reference current value.By current value comparison device, select the current value that the current value closest to described reference current value obtains as measurement electric current to be measured, if when electric current to be measured selects described Hall current sensor to measure, electric current to be measured is only through described Hall current sensor, direct measurement obtains magnitude of voltage, obtains current value through converting.Its magnitude of voltage corresponding with electric current to be measured is drawn by selecting one of them range of multirange Hall current sensor and measuring, if converse described other range of multirange Hall current sensor again to connect, the current value that then other ranges are corresponding, the corresponding current value conversed under described each range of multirange Hall current sensor and reference current value are compared, select the most accurate current value under suitable range as measurement result, do not need the plug carried out between range to switch, make current measurement more intelligent.
Accompanying drawing explanation
Fig. 1 is the device connection layout of a wherein embodiment of current measuring device of the present invention and method;
Fig. 2 be the Hall current sensor interior loop of current measuring device of the present invention and method and multirange Hall current sensor interior loop wherein an embodiment be connected in parallel figure;
Fig. 3 is the method flow diagram of a wherein embodiment of current measuring device of the present invention and method.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Embodiment 1
As described in Figure 1, a kind of current measuring device, comprises Hall current sensor 110, multirange Hall current sensor 120, electric current scaler 130 and current value comparison device 140;
The range of described Hall current sensor 110 is the maximum range of described current measuring device, and electric current to be measured converts voltage to by described Hall current sensor 110; Hall current sensor 110 in the present embodiment measurement situation concrete according to electric current to be measured is selected, and the range that described Hall current sensor 110 can detect is the maximum range of current measuring device, guarantee that electric current to be measured can not outrange by described Hall current sensor 110, so that described Hall current sensor 110 measures the current value that obtains as reference current value.
Described multirange Hall current sensor 120 comprises two or more ranges, electric current to be measured converts corresponding voltage to by the corresponding range in described multirange Hall current sensor 120, described multirange Hall current sensor 120 interior loop and described Hall current sensor 110 interior loop are connected in parallel, use any range in described multirange Hall current sensor 120 to treat and survey electric current when measuring, electric current to be measured is by described Hall current sensor 110, if electric current to be measured selects described Hall current sensor 110 to measure, then electric current to be measured is only through described Hall current sensor 110.Described multirange Hall current sensor 120 range determines by around coil turn on a sensor.Two or more varying number coil turns are utilized to be around on described multirange Hall current sensor 120 in the present embodiment, separate unaffected between coil, form the multirange Hall current sensor 120 of two or more different ranges.As shown in Figure 2, the multirange Hall current sensor of 10A and 2A is respectively for two ranges, be connected in parallel in coil in multirange Hall current sensor and Hall current sensor coil, when guaranteeing that in electric current to be measured access multirange Hall current sensor, range is measured arbitrarily, electric current to be measured necessarily passes Hall current sensor, namely when electric current to be measured connects that in multirange Hall current sensor, any range is measured, magnitude of voltage and the Hall current sensor of measuring transmission under can obtaining an electric current access range to be measured of multirange Hall current sensor measurement measure the magnitude of voltage transmitted.
The size of described voltage is converted into current value according to Hall effect by described electric current scaler 130, the current value that the size that described Hall current sensor 110 converts voltage to is converted into is as reference current value, measure if electric current to be measured connects described Hall current sensor 110, then obtain the voltage corresponding with electric current to be measured, directly convert according to Hall effect and obtain the current value of electric current to be measured, if use any range in described multirange Hall current sensor 120 to treat survey electric current to measure, described in described electric current scaler 130 also exports described voltage large young pathbreaker according to described multirange Hall current sensor 120, each range of multirange Hall current sensor 120 converts out by current value during electric current to be measured, measure with multirange Hall current sensor 120 magnitude of voltage corresponding with electric current to be measured obtained by Hall current sensor 110, corresponding current value is converted into again by Hall effect, any range of electric current access multirange Hall current sensor 120 to be measured obtains the output voltage values corresponding with accessing range, by Hall effect and other ranges of multirange Hall current sensor 120 around coil turn, the electric current to be measured that converses that can be corresponding accesses the current value that other ranges obtain.
Converted by described electric current scaler 130 current value of electric current to be measured that each range in the described multirange Hall current sensor 120 that obtains passes through and described reference current value of described current value comparison device 140 is compared, and selects current value closest to described reference current value as measuring the current value obtained; Described reference current value is the current value that maximum range detects the electric current to be measured obtained, in multirange Hall current sensor 120, each range is all less than the range of Hall element, and the current value degree of accuracy that the current value that the relatively little detection of range obtains necessarily gets than the relatively large detection of range is high, therefore, in multirange Hall current sensor 120, the corresponding current value of each range to be compared with reference current value through converting out, using the corresponding current value closest to described reference current value as finally detecting the current value obtained.
A kind of current measuring method, comprises step:
Step S210, preset the range of Hall current sensor and multirange Hall current sensor, and to set described Hall current sensor range be maximum range, described multirange Hall current sensor has two or more ranges, described multirange Hall current sensor interior loop and described Hall current sensor interior loop are connected in parallel, connect any range treat survey electric current measure.In the present embodiment, the range of Hall current sensor and multirange Hall current sensor selects suitable range according to concrete measurement situation, the range that described Hall current sensor can detect is the maximum range of current measuring device, guarantee that electric current to be measured can not outrange in measurement current course to be measured by described Hall current sensor, so that the current value that described Hall current sensor measurement obtains is as reference current value.Two or more varying number coil turns are utilized to be around on described multirange Hall current sensor in the present embodiment, separate unaffected between coil, form the multirange Hall current sensor of two or more different ranges, described multirange Hall current sensor interior loop and described Hall current sensor interior loop are connected in parallel.When any range connecting described multirange Hall current sensor is measured, electric current to be measured is by while described multirange Hall current sensor, also pass through Hall current sensor, if connect described Hall current sensor when measuring, electric current to be measured is only through described Hall current sensor.
Step S220, measure if electric current to be measured connects described Hall current sensor, then obtain the voltage corresponding with electric current to be measured, directly convert according to Hall effect and obtain the current value of electric current to be measured, if electric current to be measured connects described multirange Hall current sensor, any range is measured, then obtain electric current to be measured and connect corresponding voltage value that any range of described multirange Hall current sensor carries out measuring and the electric current to be measured magnitude of voltage through described Hall current sensor.
Step S230, convert according to Hall effect and draw the current value of the range be connected with by described multirange Hall current sensor by the current value of the electric current to be measured of described Hall current sensor, the current value that the described Hall current sensor drawn converting is measured as reference current value, and connects according to electric current to be measured the current value that magnitude of voltage that any range of described multirange Hall current sensor obtains converses the electric current to be measured that each range passes through in described multirange Hall current sensor.By the magnitude of voltage corresponding with electric current to be measured that Hall current sensor and the measurement of multirange Hall current sensor obtain, corresponding current value is converted into again by Hall effect, any range of electric current access multirange Hall current sensor to be measured obtains the output voltage values corresponding with accessing range, by Hall effect and other ranges of multirange Hall current sensor around coil turn, the electric current to be measured that converses that can be corresponding accesses the current value that other ranges obtain.
Step S240, current value and the described reference current value of the electric current to be measured passed through by each range in the described multirange Hall current sensor that draws of converting are compared, and select current value closest to described reference current value as measuring the current value obtained.If any range of electric current access multirange Hall current sensor to be measured is measured, convert and obtain the current value of each range of multirange Hall current sensor corresponding to electric current to be measured, only needing converts obtains the current value that electric current to be measured accesses the electric current to be measured of described one of them range of multirange Hall current sensor, namely obtains the current value of the electric current to be measured under the measurement of each range by converting.The current value obtained by converting again and described reference current value are compared, and the current value closest to the current value of reference current value is the measured value of the electric current to be measured under suitable range.If electric current access journey Hall current sensor to be measured is measured, then the current value to be measured under the Hall current sensor range obtained converting is as the measured value of the electric current to be measured under suitable range.
Above-mentioned current measuring device and method, be connected in parallel by multirange Hall current sensor interior loop and described Hall current sensor interior loop, electric current to be measured is selected when any range is measured in described multirange Hall current sensor, electric current to be measured is through described Hall current sensor.If electric current to be measured connects described multirange Hall current sensor, any range is measured, then measure and obtain electric current to be measured and connect magnitude of voltage that any range of described multirange Hall current sensor carries out measuring and the electric current to be measured magnitude of voltage through described Hall current sensor, convert according to Hall effect and obtain the current value that corresponding current value under each range of multirange Hall current sensor and described Hall current sensor measurements obtain, the current value of the described Hall current sensor measurement drawn converting is as reference current value.By current value comparison device, select the current value that the current value closest to described reference current value obtains as measurement electric current to be measured, if when electric current to be measured selects described Hall current sensor to measure, electric current to be measured is only through described Hall current sensor, direct measurement obtains magnitude of voltage, obtains current value through converting.Its magnitude of voltage corresponding with electric current to be measured is drawn by selecting one of them range of multirange Hall current sensor and measuring, if converse described other range of multirange Hall current sensor again to connect, the current value that then other ranges are corresponding, the corresponding current value conversed under described each range of multirange Hall current sensor and reference current value are compared, select the most accurate current value under suitable range as measurement result, do not need the plug carried out between range to switch, make current measurement more intelligent.
Wherein in an embodiment, described current measuring device, also comprise outrange judgment means, described outrange judgment means is used for when the current value that electric current scaler converts out exceeds corresponding connection range, and described outrange judgment means judges that electric current to be measured connects outrange.By outrange judgment means can be instant judge whether electric current to be measured exceeds the measurement range of multirange sensor.
Wherein in an embodiment, two or more ranges in the range of described Hall current sensor and described multirange Hall current sensor successively decrease successively with prearranged multiple relation.The range that described Hall current sensor measures electric current is 50A, wherein prearranged multiple preferably 5 times.For the ease of understanding, now be described for Hall current sensor and the multirange Hall current sensor comprising two ranges, the range selecting described Hall current sensor to measure electric current is 50A, then the range of corresponding multirange Hall current sensor is respectively 10A and 2A.If electric current to be measured accesses described Hall current sensor 50A range place and measures, then Hall current sensor correspondence exports the magnitude of voltage corresponding with electric current to be measured, converses the current value to be measured of measurement through excess current scaler 130.More accurate current measurement value to be measured is obtained if want, 10A range in multirange Hall current sensor is accessed arbitrarily or 2A range is measured by electric current to be measured, if when electric current to be measured passes through 10A range in multirange Hall current sensor, then obtain the magnitude of voltage of electric current to be measured by exporting during multirange Hall current sensor 10A range, by this magnitude of voltage according to Hall effect corresponding extrapolate the conversion current value that electric current to be measured connects 2A range, corresponding current value is converted into by electric current scaler, such as, when electric current to be measured is 5A, described Hall current sensor correspondence is measured and is obtained the value that is about 5A, measured value under 10 ranges that the measurement of multirange Hall current sensor obtains is about 5A, and measured value under 2A range exceeds the measurement range of 2A range due to 5A, the current value to be measured that then electric current estimation device is measured under extrapolating 2A range according to Hall effect is about 25A, the current value that described multirange Hall current sensor is corresponding with each range and described reference current value are compared, the current value measured under selecting the 10A range closest to described reference current value is as the current value of electric current to be measured.If when electric current to be measured is 1A, described Hall current sensor correspondence is measured and is obtained the value that is about 1A, measured value under 10 ranges that the measurement of multirange Hall current sensor obtains is about 1A, and the measured value under 2A range is about 1A, because the measuring accuracy of 2A range is higher than the measuring accuracy of 10A range, the current value that described multirange Hall current sensor is corresponding with each range and described reference current value are compared, and the current value measured under selecting the 2A range closest to described reference current value is as the current value of electric current to be measured.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (10)
1. a current measuring device, is characterized in that, comprises Hall current sensor, multirange Hall current sensor, electric current scaler and current value comparison device;
The range of described Hall current sensor is the maximum range of described current measuring device, and electric current to be measured converts voltage to by described Hall current sensor;
Described multirange Hall current sensor comprises two or more ranges, electric current to be measured converts corresponding voltage to by the corresponding range in described multirange Hall current sensor, described multirange Hall current sensor interior loop and described Hall current sensor interior loop are connected in parallel, use any range in described multirange Hall current sensor to treat and survey electric current when measuring, electric current to be measured is by described Hall current sensor, if electric current to be measured is measured by described Hall current sensor, then electric current to be measured is only through described Hall current sensor,
The size of described voltage is converted into current value according to Hall effect by described electric current scaler, the current value that the size that described Hall current sensor converts voltage to is converted into is as reference current value, measure if electric current to be measured connects described Hall current sensor, then obtain the voltage corresponding with electric current to be measured, directly convert according to Hall effect and obtain the current value of electric current to be measured, if use any range in described multirange Hall current sensor to treat survey electric current to measure, described in described electric current scaler also exports described voltage large young pathbreaker according to described multirange Hall current sensor, each range of multirange Hall current sensor converts out by current value during electric current to be measured,
Described current value comparison device described each range of multirange Hall current sensor obtained that converted by described electric current scaler is compared by current value during electric current to be measured and described reference current value, selects current value closest to described reference current value as measuring the current value obtained.
2. current measuring device according to claim 1, it is characterized in that, also comprise outrange judgment means, described outrange judgment means is used for when the current value that electric current scaler converts out exceeds corresponding connection range, and described outrange judgment means judges that electric current to be measured connects outrange.
3. current measuring device according to claim 1 and 2, is characterized in that, two or more ranges in the range of described Hall current sensor and described multirange Hall current sensor successively decrease successively with prearranged multiple relation.
4. current measuring device according to claim 1 and 2, is characterized in that, the range that described Hall current sensor measures electric current is 50A.
5. current measuring device according to claim 3, is characterized in that, described prearranged multiple is 5 times.
6. a current measuring method, is characterized in that, comprises step:
Preset the range of Hall current sensor and multirange Hall current sensor, and to set described Hall current sensor range be maximum range, described multirange Hall current sensor has two or more ranges, described multirange Hall current sensor interior loop and described Hall current sensor interior loop are connected in parallel, connect any range treat survey electric current measure;
Measure if electric current to be measured connects described Hall current sensor, then obtain the voltage corresponding with electric current to be measured, directly convert according to Hall effect and obtain the current value of electric current to be measured, if electric current to be measured connects described multirange Hall current sensor, any range is measured, then obtain electric current to be measured and connect corresponding voltage value that any range of described multirange Hall current sensor carries out measuring and the electric current to be measured magnitude of voltage through described Hall current sensor;
Convert according to Hall effect and draw the current value of the range be connected with by described multirange Hall current sensor by the current value of the electric current to be measured of described Hall current sensor, the current value that the described Hall current sensor drawn converting is measured as reference current value, and connects according to electric current to be measured the current value that magnitude of voltage that any range of described multirange Hall current sensor obtains converses the electric current to be measured that each range passes through in described multirange Hall current sensor;
Current value and the described reference current value of the electric current to be measured passed through by each range in the described multirange Hall current sensor that draws of converting are compared, and select current value closest to described reference current value as measuring the current value obtained.
7. current measuring method according to claim 6, it is characterized in that, when described corresponding current value and described reference current value are compared, also comprise step: when the current value that electric current scaler converts out exceeds corresponding connection range, described outrange judgment means judges that electric current to be measured connects outrange.
8. the current measuring method according to claim 6 or 7, is characterized in that, two or more ranges set in the range of described Hall current sensor and described multirange Hall current sensor successively decrease successively with prearranged multiple relation.
9. the current measuring method according to claim 6 or 7, is characterized in that, determines that the maximum measurement range measuring electric current is 50A.
10. current measuring method according to claim 8, is characterized in that, determines that described prearranged multiple is 5 times.
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| CN109407027A (en) * | 2018-11-21 | 2019-03-01 | 苏州英特模汽车科技有限公司 | Large range high precision current sensor metering method |
| CN109683532A (en) * | 2019-01-08 | 2019-04-26 | 上海应用技术大学 | A kind of steering engine and more steering engine controllers and unmanned aerial vehicle control system |
| CN110286257A (en) * | 2019-06-20 | 2019-09-27 | 西安易朴通讯技术有限公司 | Electric current detecting method and device, electronic equipment and computer readable storage medium |
| CN115833705A (en) * | 2023-02-15 | 2023-03-21 | 中国科学院宁波材料技术与工程研究所 | Seamless switching method and device between multiple current sensors of rim motor |
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Application publication date: 20160420 |