CN204154889U - A kind of mutual inductor load box calibrating installation - Google Patents
A kind of mutual inductor load box calibrating installation Download PDFInfo
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- CN204154889U CN204154889U CN201420598823.4U CN201420598823U CN204154889U CN 204154889 U CN204154889 U CN 204154889U CN 201420598823 U CN201420598823 U CN 201420598823U CN 204154889 U CN204154889 U CN 204154889U
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- 238000006243 chemical reaction Methods 0.000 claims description 6
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- 238000005259 measurement Methods 0.000 abstract description 3
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Abstract
The utility model provides a kind of mutual inductor load box calibrating installation, comprise housing, Switching Power Supply, power amplifier, gear switch circuit, sample circuit and processor, wherein: power amplifier, gear switch circuit, sample circuit and processor are arranged in housing; Switching Power Supply provides power supply for power amplifier, the power source of power amplifier to input amplifies, and the signal after amplifying is passed to gear switch circuit, gear switch circuit selects voltage or electric current gear according to power input source size, sample circuit is sampled to the voltage of input or current signal, and by the signal of employing to processor, processor processes in real time to the data gathered, and carries out controlling of sampling by power amplifier simultaneously.The utility model structure is simple, easy to carry, measurement is accurate, meets industry spot requirement.
Description
Technical field
The utility model relates to electric instrument equipment technical field, particularly, relates to a kind of mutual inductor load box calibrating installation.
Background technology
Mutual inductor load box is when calibration current or voltage transformer (VT), for being provided the gauging instrument of a kind of Multi-value of simulation load by school mutual inductor.The fast development of national economy makes the demand of electric power increasing, and stability, the reliability of the work of electrical measurement mutual inductor are most important in electrical measurement process control.As mutual inductor load box calibration equipment, the checkout equipment of traditional mutual inductor load box is bulky, and link is complicated, and inconvenient operation, can not meet the request for utilization of industry spot.
Along with a large amount of uses of mutual inductor load box, the verifying work of mutual inductor load box also increasingly sharpens, classic method adopts high-power program control source output voltage current signal, adopt the electric current in High-precision standard table testing load case both end voltage, loop and the phase place between voltage and electric current, when the load of electric current and voltage Burden box is very little, the voltage measured or electric current will be very little, and standard scale general like this can not meet measuring accuracy.And when measuring with external standard scale, also error will be brought to electric current and voltage, and more cannot realize real-time recorded data and calculate error, and operation is very loaded down with trivial details, realize a large amount of calibratings, time-consuming, effort.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of mutual inductor load box calibrating installation, and easy to operate, volume is little, meets the request for utilization of industry spot.
The utility model provides a kind of mutual inductor load box calibrating installation, comprise housing, Switching Power Supply, power amplifier, gear switch circuit, sample circuit and processor, wherein: housing is connected with Switching Power Supply, power amplifier, gear switch circuit, sample circuit and processor circuit; Switching Power Supply provides power supply for power amplifier, the input end connection handling device of power amplifier, output terminal connect the input end of gear switch circuit, the output terminal of gear switch circuit connects the input end of sample circuit, the input end of the output terminal connection handling device of sample circuit; The power source of power amplifier to input amplifies, and the signal after amplifying is passed to gear switch circuit, and gear switch circuit selects voltage or electric current gear according to power input source size; Sample circuit is sampled to the voltage of input or current signal, and by the signal of employing to processor; Processor processes in real time to the data gathered, and carries out controlling of sampling by power amplifier simultaneously.
Preferably, described housing comprises front panel and rear panel, wherein:
Described front panel is distributed with display screen, knob, button, signal input terminal, signal output terminal, wherein: described knob is rotary encoder, for finely tuning operation or cursor switching efficiently; Described button comprises numerical function key and shortcut; Described signal input terminal is connected with Burden box with described signal output terminal, for the transmission of voltage or current signal; Described display screen, rotary encoder connect described processor;
Described rear panel is distributed with fan and ventilating opening, instrument working power interface, power switch button, ground terminal, communication interface, instrument factory calibration mark.
Preferably, described processor adopts the design of ARM and DSP double-core, ARM is responsible for voltage or current sample, calculating, calibration, storage calibration data and gear switch, last and DSP communication is by data upload, and shown by DSP real-time system, the collection of DSP primary responsibility voltage or current signal and FFT calculate, voltage or electric current gear calculate and switch and Keyboard Control, thus both can alleviate the burden of DSP calculating, can by table source separately, make between table source unaffected mutually again.
Preferably, described Switching Power Supply adopts high power switching power supply, described high power switching power supply is combined with voltage or the accurate sample circuit of electric current, voltage or electric current verification employing one road power amplifier time-sharing multiplex, this avoid the mutual interference between electric current and voltage, and reduce merging, and calibration equipment volume also can do little, light, be easy to carry about with one.
Compared with prior art, the utility model has following beneficial effect:
The utility model structure is simple, light, is convenient for carrying, and avoids the mutual interference between electric current and voltage simultaneously, measures more accurately, simply, is applicable to industry spot request for utilization.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is the utility model one-piece construction schematic diagram;
Fig. 2 is the utility model front panel schematic diagram;
Fig. 3 is the utility model rear panel schematic diagram;
In figure: 1 is housing, 2 is high power switching power supply, and 3 is power amplifier, and 4 is gear switch circuit, and 5 is sample circuit, and 6 is processor;
11 is front panel, and 11-1 is display screen, and 11-2 is rotary encoder, and 11-3 is numerical function key, and 11-4 is shortcut, and 11-5 signal input terminal is, 11-6 is signal output terminal;
11-5-1 is " RsH ", 11-5-2 is " RsL ", 11-6-1 is " UoH ", 11-6-2 is " UoL ";
12 is rear panel, and 12-1 is fan and ventilating opening, and 12-2 is instrument working power interface, and 12-3 is power switch button, and 12-4 is ground terminal, and 12-5,12-6 are communication interface, and 12-7 is instrument factory calibration mark.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
As shown in Figure 1, the present embodiment provides a kind of mutual inductor load box calibrating installation, comprise housing 1, high power switching power supply 2, power amplifier 3 (voltage power amplifier and current amplifier circuit time-sharing multiplex), gear switch circuit 4 (voltage gear commutation circuit and electric current gear commutation circuit), sample circuit 5 (accurate voltage sample circuit and precision current sample circuit) and processor 6, wherein: housing 1 is connected with high power switching power supply 2, power amplifier 3, gear switch circuit 4, sample circuit 5 and processor 6 circuit; High power switching power supply 2 provides power source for power amplifier 3, the input end connection handling device 6 of power amplifier 3, output terminal connect the input end of gear switch circuit 4, the output terminal of gear switch circuit 4 connects the input end of sample circuit 5, the input end of the output terminal connection handling device 6 of sample circuit 5; The power source of power amplifier 3 to input amplifies, and the signal after amplifying is passed to gear switch circuit 4, and gear switch circuit 4, according to power input source size, selects voltage or electric current gear automatically; Sample circuit 5 is sampled to the voltage of input or current signal, and by the signal of employing to processor 6; Processor 6 processes in real time to the data gathered, and carries out controlling of sampling by power amplifier 3 simultaneously.
As shown in Figure 2,3, described housing 1 comprises front panel 11 and rear panel 12.
As shown in Figure 2, described front panel 11 is distributed with display screen 11-1, rotary encoder 11-2, numerical function key 11-3, shortcut 11-4, signal input terminal 11-5 (11-5-1 is " RsH " and 11-5-2 is " RsL "), signal output terminal 11-6 (11-6-1 is " UoH " and 11-6-2 is " UoL "), wherein: described display screen 11-1 shows information; Described rotary encoder 11-2 is used for fine setting operation efficiently or cursor switches; Described signal input terminal 11-5 is connected with Burden box with described signal output terminal 11-6, for the transmission of voltage or current signal.
As shown in Figure 3, described rear panel 12 is distributed with fan and ventilating opening 12-1, instrument working power interface 12-2, power switch button 12-3, ground terminal 12-4, communication interface 12-5,12-6, instrument factory calibration mark 12-7.
In the present embodiment, what described display screen 11-1 adopted is VGA wide Wen Zhencai HHHHTFT-LCD LCDs.
In the present embodiment, described high power switching power supply 2 is combined with accurate voltage or current sampling circuit 5, voltage or electric current verification employing one road power amplifier 3 time-sharing multiplex, this avoid the mutual interference between electric current and voltage, and reduce merging, and calibration equipment volume also can do little, light, is easy to carry about with one.Accurate voltage or current sampling circuit 5 adopt successive approximation analog to digital conversion circuit, are provided with one 16 without losing code sampling analog to digital converter, internal conversion clock, a multi-functional serial interface port and a sampling hold circuit in this analog to digital conversion circuit.Particularly, AD7688 chip can be adopted to realize.
In the present embodiment, described high power switching power supply 2 adopts 0.05 step voltage or the high-power source of electric current, adopts 0.05 step voltage or current standard table.
In the present embodiment, described processor 6 adopts ARM and DSP double-core to design, ARM is responsible for voltage or current sample, calculating, calibration, storage calibration data and gear switch, last and DSP communication is by data upload, shown by DSP real-time system, the collection of DSP primary responsibility voltage or current signal and FFT calculate, voltage or electric current gear calculate and switch and man-machine interface and Keyboard Control, so both can alleviate the burden that DSP calculates, can by table source separately, make between table source unaffected mutually again.In the present embodiment, described ARM can adopt chip LPC2114.Described DSP adopts chip BF532 and ADI BF532 high-speed dsp.
When the utility model is for verifying Burden box, adopt four-wire system connection, namely with wire, signal output terminal 11-6-1 (" UoH ") is connected with Burden box with 11-6-2 (" UoL "), and Burden box is connected with signal input terminal 11-5-1 (" RsH ") with 11-6-1 (" UoH ") link wire, Burden box is connected with signal input terminal 11-5-2 (" RsL ") with 11-6-2 (" UoL ") link wire.
When the utility model exports use as source, if current selection voltage gear, by signal input terminal 11-5-1 (" RsH ") and signal output terminal 11-6-1 (" UoH ") short circuit, signal input terminal 11-5-2 (" RsL ") and signal output terminal 11-6-2 (" UoL ") short circuit, from two-terminal output voltage; If select electric current gear, by signal output terminal 11-6-1 (" UoH ") and signal output terminal 11-6-2 (" UoL ") short circuit, output current.
Device described in the utility model before the use, need first by the ground terminal 12-4 on rear panel 12 by fuselage reliable ground, to prevent fuselage induction electrostatic in this plant running, affect measuring accuracy.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.
Claims (6)
1. a mutual inductor load box calibrating installation, is characterized in that, comprises housing, Switching Power Supply, power amplifier, gear switch circuit, sample circuit and processor, wherein: power amplifier, gear switch circuit, sample circuit and processor are arranged in housing; Switching Power Supply provides power source for power amplifier, the input end connection handling device of power amplifier, output terminal connect the input end of gear switch circuit, the output terminal of gear switch circuit connects the input end of sample circuit, the input end of the output terminal connection handling device of sample circuit; The power source of power amplifier to input amplifies, and the signal after amplifying is passed to gear switch circuit, and gear switch circuit selects voltage or electric current gear according to power input source size; Sample circuit is sampled to the voltage of input or current signal, and by the signal of employing to processor; Processor processes in real time to the data gathered, and carries out controlling of sampling by power amplifier simultaneously.
2. mutual inductor load box calibrating installation according to claim 1, is characterized in that, described housing comprises front panel and rear panel; Wherein:
Described front panel is distributed with display screen, knob, button, signal input terminal, signal output terminal, wherein: described knob is rotary encoder, for finely tuning operation or cursor switching efficiently; Described button comprises numerical function key and shortcut; Described signal input terminal is connected with Burden box with described signal output terminal, for the transmission of voltage or current signal; Described display screen, rotary encoder connect described processor;
Described rear panel is distributed with fan and ventilating opening, instrument working power interface, power switch button, ground terminal, communication interface, instrument factory calibration mark.
3. mutual inductor load box calibrating installation according to claim 1, it is characterized in that, described processor adopts the design of ARM and DSP double-core, ARM is responsible for voltage or current sample, calculating, calibration, storage calibration data and gear switch, last and DSP communication is by data upload, shown by DSP real-time system, the collection of DSP primary responsibility voltage or current signal and FFT calculate, and voltage or electric current gear calculate and switch and Keyboard Control.
4. the mutual inductor load box calibrating installation according to any one of claim 1-3, it is characterized in that, described Switching Power Supply adopts high power switching power supply, and described high power switching power supply is combined with voltage or the accurate sample circuit of electric current, voltage or electric current verification employing one road power amplifier time-sharing multiplex.
5. mutual inductor load box calibrating installation according to claim 4, it is characterized in that, described sample circuit adopts successive approximation analog to digital conversion circuit, is provided with one 16 without losing code sampling analog to digital converter, internal conversion clock, a multi-functional serial interface port and a sampling hold circuit in this analog to digital conversion circuit.
6. mutual inductor load box calibrating installation according to claim 5, is characterized in that, described sample circuit adopts AD7688 chip to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598823.4U CN204154889U (en) | 2014-10-16 | 2014-10-16 | A kind of mutual inductor load box calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598823.4U CN204154889U (en) | 2014-10-16 | 2014-10-16 | A kind of mutual inductor load box calibrating installation |
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| CN204154889U true CN204154889U (en) | 2015-02-11 |
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| CN201420598823.4U Expired - Lifetime CN204154889U (en) | 2014-10-16 | 2014-10-16 | A kind of mutual inductor load box calibrating installation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915191A (en) * | 2016-06-20 | 2016-08-31 | 上海觉浅广播器材有限公司 | Controller for frequency-modulated high power amplifier |
| CN106772197A (en) * | 2017-01-05 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | Calibration device for load box of mutual inductor |
| CN107422290A (en) * | 2017-09-13 | 2017-12-01 | 云南电网有限责任公司电力科学研究院 | A kind of device for being used to control mutual inductor load box gear switch |
| CN107860991A (en) * | 2017-10-16 | 2018-03-30 | 国网江苏省电力公司电力科学研究院 | A kind of intelligent network lotus interactive terminal time-sharing multiplex detection means and method |
| CN108363030A (en) * | 2018-05-18 | 2018-08-03 | 福州大学 | A kind of portable three-phase voltage current calibration instrument and its control method |
| CN108646210A (en) * | 2018-05-18 | 2018-10-12 | 云南电网有限责任公司电力科学研究院 | current transformer load box calibration point switching device |
| CN116125357A (en) * | 2023-04-04 | 2023-05-16 | 湖北蓝博新能源设备股份有限公司 | Battery testing method and calibration device and method of battery testing equipment |
-
2014
- 2014-10-16 CN CN201420598823.4U patent/CN204154889U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915191A (en) * | 2016-06-20 | 2016-08-31 | 上海觉浅广播器材有限公司 | Controller for frequency-modulated high power amplifier |
| CN106772197A (en) * | 2017-01-05 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | Calibration device for load box of mutual inductor |
| CN106772197B (en) * | 2017-01-05 | 2019-11-01 | 云南电网有限责任公司电力科学研究院 | Calibration device for load box of mutual inductor |
| CN107422290A (en) * | 2017-09-13 | 2017-12-01 | 云南电网有限责任公司电力科学研究院 | A kind of device for being used to control mutual inductor load box gear switch |
| CN107422290B (en) * | 2017-09-13 | 2023-11-10 | 云南电网有限责任公司电力科学研究院 | Device for controlling shift switching of transformer load box |
| CN107860991A (en) * | 2017-10-16 | 2018-03-30 | 国网江苏省电力公司电力科学研究院 | A kind of intelligent network lotus interactive terminal time-sharing multiplex detection means and method |
| CN107860991B (en) * | 2017-10-16 | 2020-08-14 | 国网江苏省电力公司电力科学研究院 | Time-sharing multiplexing detection device and method for intelligent network charge interactive terminal |
| CN108363030A (en) * | 2018-05-18 | 2018-08-03 | 福州大学 | A kind of portable three-phase voltage current calibration instrument and its control method |
| CN108646210A (en) * | 2018-05-18 | 2018-10-12 | 云南电网有限责任公司电力科学研究院 | current transformer load box calibration point switching device |
| CN116125357A (en) * | 2023-04-04 | 2023-05-16 | 湖北蓝博新能源设备股份有限公司 | Battery testing method and calibration device and method of battery testing equipment |
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