CN109283387A - A kind of non-contact current detection type electrical quantity measurement arrangement of pipe detector - Google Patents
A kind of non-contact current detection type electrical quantity measurement arrangement of pipe detector Download PDFInfo
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- CN109283387A CN109283387A CN201811285718.4A CN201811285718A CN109283387A CN 109283387 A CN109283387 A CN 109283387A CN 201811285718 A CN201811285718 A CN 201811285718A CN 109283387 A CN109283387 A CN 109283387A
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- 238000005259 measurement Methods 0.000 title claims abstract description 20
- 230000003750 conditioning effect Effects 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 20
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- 238000005070 sampling Methods 0.000 claims description 15
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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Abstract
The present invention relates to a kind of pipe detectors with non-contact current detection type electrical quantity measurement arrangement, connect with battery pack, including voltage detecting circuit, current detection circuit, signal conditioning circuit, A/D converter circuit, single-chip microcontroller, display component and voltage conversion circuit.Current detection circuit carries out non-contact current detecting using Hall element, when avoiding series connection precision resistance progress current detecting, the power consumption of generation, and avoid the normal work problem that battery main circuit power supply is influenced in precision resistance failure.The present invention can make pipe detection personnel when carrying out pipe detection using pipe detector, and the power consumption condition for understanding battery pack in real time can in time replace it when battery electric quantity exhausts；The present invention is small in size, light weight and cost is low, and simple production process.
Description
Technical field
The present invention relates to power technique fields more particularly to a kind of non-contact current detection type electricity of pipe detector to survey
Measure device.
Background technique
Pipeline body security evaluation is carried out with pipe detector, is that current oil-gas pipeline detection is main and most effective
Means.In order to ensure detector can safely and steadly be run in the duct, need to carry out the battery pack powered for detector
Necessary control and management, so that each of battery pack single battery can be utilized fully, and keep good performance,
It prolongs its service life.
Summary of the invention
The present invention is to solve technical problem present in well-known technique and provide a kind of pipe detector non-contact electric current
Detection formula electrical quantity measurement arrangement, to monitor the electricity consumption situation and remaining capacity of battery pack.
The technical scheme adopted by the present invention to solve the technical problems existing in the known art is that a kind of pipe detector
It with non-contact current detection type electrical quantity measurement arrangement, is connect with battery pack, including voltage detecting circuit, current detection circuit, letter
Number conditioning circuit, A/D converter circuit, single-chip microcontroller and display component；
The voltage detecting circuit connects battery pack positive and negative electrode, exports the real-time voltage sampled value of battery pack to the letter
Number conditioning circuit；
The current detection circuit uses non-contact current detection mode, exports battery-powered main circuit current sampled value
To the signal conditioning circuit；
After the signal conditioning circuit carries out signal condition to voltage sample value and current sampling data, it is output to AD conversion electricity
Road；
The A/D converter circuit carries out analog to digital conversion, the detection of output digitized voltage and current detecting data to single-chip microcontroller；
The single-chip microcontroller is connect with the display component；For the real-time electricity consumption of battery pack and remaining capacity data to be sent
It is shown to the display component.
Further, the current detection circuit, comprising: Hall current sensor ACS711, capacitor C1 and resistance R3；Institute
12 connection+5V the power supply of pin of ACS711 is stated, pin 5 is grounded；Pin 1,2 is shorted, and after pin 3,4 is shorted, accesses battery pack master
Current supply circuit flows into main circuit current from pin 1,2, flows out from pin 3,4；Pin 11 exports current sampling data；Pin 12
Resistance R3 is connected between pin 6, and filter capacitor C1 is connected between pin 12 and ground.
Current detecting is carried out using Hall effect, when avoiding series connection precision resistance progress current detecting, is connected on battery
The power consumption of the precision resistance of group main circuit power supply, and avoid in precision resistance failure, influence battery main circuit power supply
Normal work problem；Even if measuring device breaks down, the normal work of main circuit power supply is nor affected on.
Further, the voltage detecting circuit uses electric resistance partial pressure measuring device, including resistance R1, resistance R2 and sampling
Switch SW1；The sampling switch SW1, resistance R1 and resistance R2 are sequentially connected in series the positive and negative electrode in battery pack.
Resistance R1 and resistance R2 is big valued resistor, is divided by series connection and carries out voltage sample, can reduce measuring device
Power consumption, tandem tap SW1 can off voltage detection circuit as needed.
Further, the signal conditioning circuit includes voltage signal conditioning circuit and current signal conditioning circuit；
After the voltage signal conditioning circuit carries out signal filtering and isolation to voltage sample value, it is output to AD conversion electricity
Road；
After the current signal conditioning circuit carries out signal filtering and differential amplification to current sampling data, it is output to AD conversion
Circuit.
By being carried out signal condition, filtering clutter signal respectively to voltage sample value and current sampling data, isolation is put
Greatly, meet the amplitude requirement of AD conversion.
Further, the signal conditioning circuit includes dual operational amplifier chip LM258, resistance R4, R5, R6, R7, R8
With capacitor C2, C3；
The amplifier 1 and resistance R4, R5 and capacitor C2 of LM258 constitutes voltage follower, carries out signal filter to voltage sample value
Wave and isolation；
The amplifier 2 and resistance R6, R7, R8 and capacitor C3 of LM258 constitutes difference amplifier, carries out signal to current sampling data
Filtering and differential amplification；
It specifically connects and includes:
The pin 1 of LM258 is connected by the pin 2 of resistance R5 and LM258, and for exporting the voltage detecting after improving
Signal is to A/D converter circuit；
The pin 3 of LM258 is connected by the output end of resistance R4 and voltage detecting circuit, and is grounded by capacitor C2；
The pin 4 of LM258 is grounded；
The pin 5 of LM258 is connected by the output end of resistance R6 and current detection circuit, and is grounded by capacitor C3；
The pin 6 of LM258 passes through resistance R7 connection+2.5V power supply；
The pin 7 of LM258 is connected by the pin 6 of resistance R8 and LM258, and for exporting the current detecting after improving
Signal is to A/D converter circuit；
The pin 8 of LM258, connects+5V power supply.
Further, the single-chip microcontroller is ATmega128.
Further, the A/D converter circuit is using the ADC module embedded in single chip computer AT mega128.
Further, the display component is OCMJ4X8C_3 type liquid crystal display or three Digital sum pipes.
It further, further include to voltage detecting circuit, current detection circuit, signal conditioning circuit, A/D converter circuit, list
The voltage conversion circuit of piece machine and display component power supply, the voltage conversion circuit includes DC-DC module 1 and DC-DC module 2；
The positive and negative electrode of the input terminal connection battery pack of the DC-DC module 1, output+5V arrive current detection circuit, signal
Conditioning circuit and display component power supply；Meanwhile the 1 output+5V of DC-DC module arrives DC-DC module 2；The DC-DC module 2
+ 3.3V voltage is exported to power to single-chip microcontroller；Export the reference electricity of+2.5V voltage to signal conditioning circuit as differential amplifier circuit
Pressure.
Further, the DC-DC module 1 realizes decompression transformation using DC/DC chopper circuit；The DC-DC module 2 is logical
It crosses AMS1117 and peripheral circuit is realized and converted from+5V to 3.3V ,+5V to the voltage of 2.5V.
The advantages and positive effects of the present invention are: realizing the real time monitoring to battery pack current and voltage, pass through
The real-time electricity consumption of chip microcontroller battery pack and the real time monitoring of remaining capacity are believed by display component real-time display correlation
Breath makes pipe detection personnel when carrying out pipe detection using pipe detector, can understand the power consumption condition of battery pack in real time,
When battery electric quantity exhausts, it can be replaced in time.Non-contact current detecting is carried out using Hall element, is avoided
When series connection precision resistance carries out current detecting, it is connected on the power consumption of the precision resistance of main circuit power supply, and avoid in essence
When close Resistance Fault, the normal work problem of battery main circuit power supply is influenced；Even if measuring device breaks down, confession is nor affected on
The normal work of electric major loop.And the present invention is small in size, light weight and cost is low, and simple production process.
Detailed description of the invention
Fig. 1 is structural schematic block diagram of the invention；
Fig. 2 is current detection circuit connection schematic diagram of the invention；
Fig. 3 is voltage detecting circuit connection schematic diagram of the invention；
Fig. 4 is voltage signal conditioning circuit connection schematic diagram of the invention；
Fig. 5 is current signal conditioning circuit connection schematic diagram of the invention；
Fig. 6 is voltage conversion circuit connection schematic diagram of the invention.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
Please refer to FIG. 1 to FIG. 6, the non-contact current detection type electrical quantity measurement arrangement of a kind of pipe detector, with battery pack
Connection, as shown in Figure 1, include voltage detecting circuit, current detection circuit, signal conditioning circuit, A/D converter circuit, single-chip microcontroller,
Display component and voltage conversion circuit；
Wherein,
Voltage detecting circuit connects battery pack positive and negative electrode, and the real-time voltage sampled value for exporting battery pack is electric to signal condition
Road；
Current detection circuit uses non-contact current detection mode, exports battery-powered main circuit current sampled value to letter
Number conditioning circuit；
After signal conditioning circuit carries out signal condition to voltage sample value and current sampling data, it is output to A/D converter circuit；
After A/D converter circuit carries out analog to digital conversion, the detection of output digitized voltage and current detecting data to single-chip microcontroller；
The single-chip microcontroller is connect with the display component；The electricity consumption and remaining capacity data for calculating battery pack are sent to display
Component is shown.
Specifically, current detecting is carried out using Hall effect using the current detection circuit of non-contact current detection mode,
When avoiding series connection precision resistance progress current detecting, it is connected on the power consumption of the precision resistance of battery-powered major loop, and
Avoid the normal work problem that battery main circuit power supply is influenced in precision resistance failure；Even if measuring device breaks down,
Nor affect on the normal work of main circuit power supply.
As shown in Fig. 2, current detection circuit includes Hall current sensor ACS711, capacitor C1 and resistance R3；Wherein,
The pin 1,2 of ACS711 is shorted, and after pin 3,4 is shorted, is accessed battery pack major loop, is flowed into main circuit current from pin 1,2,
It is flowed out from pin 3,4；The pin 12 of ACS711 connects supply voltage VCC, and pin 5 is grounded, 11 output electric current measure signal of pin
U1；Resistance R3 is connected between pin 12 and pin 6, and filter capacitor C1 is connected between pin 12 and ground.
For ACS711 according to Hall effect, the size of current that will flow through the short circuit of pin 1,2 and pin 3,4 is converted to corresponding electricity
Pressure value is exported from pin 11；When input current is zero, the voltage that pin 11 exports is not zero, and the one of output supply voltage VCC
Half, the present embodiment VCC are 5V.
As shown in figure 3, voltage detecting circuit uses electric resistance partial pressure voltage measuring apparatus, including resistance R1, resistance R2 and adopt
Sample switch SW1；Wherein, sampling switch SW1, resistance R1 and resistance R2 are sequentially connected in series the positive and negative electrode in battery pack, voltage detecting letter
Number U2 is drawn from the both ends of resistance R2；Specifically, the internal resistance of battery is smaller, there is preferable carrying load ability, load resistance is bigger,
Power consumption is smaller, to reduce power consumption, big resistance is selected to be divided, and R1 chooses the Chip-R that resistance value is 100K Ω, and R2 chooses resistance
Value is the Chip-R of 10K Ω；The work of switch SW1 control voltage detecting circuit.
Due to voltage, electric current it is actually detected in, it may appear that error and interference need signal conditioning circuit to output
Voltage, current signal are pre-processed；To further increase the stability of voltage, current measurement, excluding a large amount of interference signals, need
Add low-pass filter circuit, meanwhile, Hall current sensor measurement output voltage signal it is too small, need to by integrated transporting discharging by its
Amplification carries out analog-to-digital conversion to it convenient for analog-digital converter (ADC)；Since voltage signal, current signal require to carry out signal
Conditioning, therefore signal conditioning circuit selects dual operational amplifier chip LM258；Voltage is collectively constituted by LM258 and peripheral circuit
Signal conditioning circuit and current signal conditioning circuit.
As shown in figure 4, voltage signal conditioning circuit includes amplifier 1, resistance R4, R5 and the capacitor C2 of LM258；
Resistance R4 and capacitor C2 are connected between voltage detecting output end and ground, constitute low-pass filter, 1 foot of resistance R4
It is connect with voltage detecting output end, the noninverting input pin 3 of the 2 feet connection amplifier 1 of resistance R4；R4 resistance is 1K Ω, and C2 is
0.47uF, low-pass filter circuit cutoff frequency at this time are 338.6Hz；
On the one hand the output pin 1 of amplifier 1 is connect by resistance R5 with the reverse input end pin 2 of amplifier 1, another
Aspect exports the voltage detection signal after conditioning to A/D converter circuit.
As shown in figure 5, voltage signal conditioning circuit includes amplifier 2, resistance R6, R7, R8 and the capacitor C3 of LM258；
Since Hall current sensor quiescent output voltage is 2.5V, for the influence for eliminating 2.5V quiescent voltage, amplifier 2 connects
It is connected into differential amplifier circuit；
2.5V voltage is connected to the reverse input end pin 5 of amplifier 2 by resistance R7, the output pin 7 of amplifier 2, and one
Aspect is connect by resistance R8 with the reverse input end pin 6 of amplifier 1, and on the other hand the current detection signal after output conditioning arrives
A/D converter circuit；R7 resistance is 1K Ω, and R8 resistance is 5K Ω；
Resistance R6 and capacitor C3 are connected between voltage detecting output end and ground, constitute low-pass filter, 1 foot of resistance R6
It is connect with current detecting output end, the noninverting input pin 3 of the 2 feet connection amplifier 2 of resistance R6；R6 resistance is 1K Ω, and C3 is
0.47uF。
A/D converter circuit is AD converted the voltage detection signal and current detection signal of signal conditioning circuit output；
A/D converter circuit can be used integrated circuit and build, and also can use the ADC module carried in single-chip microcontroller and carries out；
Specifically, carrying out digital-to-analogue conversion using the ADC embedded in single-chip microcontroller in the present embodiment, does so, both can satisfy
Accuracy requirement, and can simplify circuit, reduce printed circuit board sizes.
The single-chip microcontroller of the present embodiment uses ATmega128.ATmega128 is 8 series monolithics of atmel corp's research and development
A single-chip microcontroller of middle highest configuration, has the characteristics of high stability, low-power consumption.ATmega128 uses risc architecture, has rich
Rich instruction set, most instructions can be completed in one cycle, and ATmega128 has the In-System Programmable of 128K byte
Flash has 10,000 write/erase except the period, can be realized reading, modification, write operation.Possess 4KB EEPROM, 4KB in piece
SRAM, 4 have the flexible timer/counters of comparison pattern, and 8 channels are single-ended or 10 ADC of Differential Input, can pass through
ISP realizes in-system programming, has 6 kinds of selectable energy-saving modes, has a compatible jtag interface, can be used for in-circuit emulation
Debugging.
Single chip computer AT mega128 is multiplied the supply current of battery pack to obtain output power with supply voltage, further according to confession
The electric time carries out the electricity consumption of accumulation calculating battery pack to output power, by subtracting each other to obtain electricity with the electricity of battery pack Full Charge Capacity
The remaining capacity of pond group.
The data such as the electricity consumption of measurement and remaining capacity are sent to display component and shown by the single-chip microcontroller；
Display component can need to choose three Digital sum pipes or liquid crystal display according to specific works environment and condition；
Optionally, display component is OCMJ4X8C_3 type liquid crystal display.Each pin of OCMJ4X8C_3 type liquid crystal display
Are as follows:
Pin 1 --- VSS logic power；
Pin 2 --- logic power+5V；
Pin 3 --- NC is connectionless；
Pin 4 --- RS (CS) is high: data are low: instruction (piece of serial input selects)；
Pin 5 --- R/W (SID) is high: reading low: writing (serial data)；
The enable end (serial clock) pin 6 --- E (SCLK)；
Pin 7-14 --- DB0-DB7 parallel data end；
Pin 15 --- PSB high: parallel/low: serial；
Pin 16 --- NC is connectionless；
Pin 17 ---/RST system reset low level is effective；
Pin 18 --- NC is without even；
Pin 19 --- LEDA backlight electric power+5V；
Pin 20 --- LEDK backlight electric power 0V.
Voltage conversion circuit is to voltage detecting circuit, current detection circuit, signal conditioning circuit, AD conversion in measuring device
Circuit, single-chip microcontroller and display component power supply, as shown in fig. 6, specifically including DC-DC module 1 and DC-DC module 2；
The positive and negative electrode of the input terminal connection battery pack of DC-DC module 1, converts output 5V by DC voltage and examines to electric current
Slowdown monitoring circuit, signal conditioning circuit and display component power supply；Meanwhile 5V is exported to DC-DC module 2；DC-DC module 1 uses DC/DC
Chopper circuit realizes decompression transformation.DC/DC chopper circuit output electric current is larger, and high conversion efficiency, power consumption is far smaller than pressure stabilizing core
Piece.Consider package size problem, selects integrated DC/DC conversion chip.It is 0~32V that technical requirement, which measures voltage range, real
In the case of border, cell voltage be less than certain value when, system will stop working, actual measurement voltage range 10~32V it
Between.Comprehensively consider, choose Linear Technology company produce LTM8025 converter, input voltage range be 3.6~
36V, output voltage are 0.8~24V, and the output electric current of up to 3A, operating temperature is -40 DEG C~125 DEG C, will by adjusting resistance
Output voltage is adjusted to 5V.
2 pairs of input 5V voltages progress DC voltage conversions of DC-DC module export 3.3V voltage and power to single-chip microcontroller, output
Reference voltage of the 2.5V voltage to signal conditioning circuit as differential amplifier circuit；
Specifically, DC-DC module 2 is realized by AMS1117 and peripheral circuit from+5V to 3.3V ,+5V to the electricity of 2.5V
Pressure conversion.
Voltage conversion circuit is not limited to only export above-mentioned voltage value power supply, when current detection circuit, signal conditioning circuit, list
When the change of piece machine and display component, same exportable corresponding required power voltage supply.
In conclusion pipe detector electricity consumption measuring device provided in an embodiment of the present invention, is realized to battery pack current
It is real-time by display component by the real-time electricity consumption and remaining capacity of chip microcontroller battery pack with the real time monitoring of voltage
It shows relevant information, makes pipe detection personnel when carrying out pipe detection using pipe detector, understand the consumption of battery pack in real time
Electric situation can in time replace it when battery electric quantity exhausts；The present invention is small in size, light weight and cost is low,
And simple production process.
Non-contact current detecting is carried out using Hall element, when avoiding series connection precision resistance progress current detecting, series connection
It in the power consumption of the precision resistance of main circuit power supply, and avoids in precision resistance failure, influences battery main circuit power supply
Normal work problem；Even if measuring device breaks down, the normal work of main circuit power supply is nor affected on.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, in the case where not departing from present inventive concept and scope of the claimed protection, goes back
Many forms can be made, within these are all belonged to the scope of protection of the present invention.
Claims (10)
1. a kind of non-contact current detection type electrical quantity measurement arrangement of pipe detector, connect with battery pack, which is characterized in that packet
Include voltage detecting circuit, current detection circuit, signal conditioning circuit, A/D converter circuit, single-chip microcontroller and display component；
The voltage detecting circuit connects battery pack positive and negative electrode, exports the real-time voltage sampled value of battery pack to the signal tune
Manage circuit；
The current detection circuit uses non-contact current detection mode, exports battery-powered main circuit current sampled value to institute
State signal conditioning circuit；
After the signal conditioning circuit carries out signal condition to voltage sample value and current sampling data, it is output to A/D converter circuit；
The A/D converter circuit carries out analog to digital conversion, the detection of output digitized voltage and current detecting data to single-chip microcontroller；
The single-chip microcontroller is connect with the display component；For the real-time electricity consumption of battery pack and remaining capacity data to be sent to institute
Display component is stated to be shown.
2. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 1, which is characterized in that
The current detection circuit includes Hall current sensor ACS711, capacitor C1 and resistance R3；The pin 12 of the ACS711 connects
+ 5V power supply is connect, pin 5 is grounded；Pin 1,2 is shorted, and after pin 3,4 is shorted, accesses battery-powered major loop, keeps major loop electric
Stream is flowed into from pin 1,2, is flowed out from pin 3,4；Pin 11 exports current sampling data；Resistance is connected between pin 12 and pin 6
R3 connects filter capacitor C1 between pin 12 and ground.
3. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 1, which is characterized in that
The voltage detecting circuit uses electric resistance partial pressure measuring device, including resistance R1, resistance R2 and sampling switch SW1；The sampling
Switch SW1, resistance R1 and resistance R2 are sequentially connected in series between the positive and negative electrode of battery pack.
4. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 1, which is characterized in that
The signal conditioning circuit includes voltage signal conditioning circuit and current signal conditioning circuit；
After the voltage signal conditioning circuit carries out signal filtering and isolation to voltage sample value, it is output to A/D converter circuit；
After the current signal conditioning circuit carries out signal filtering and differential amplification to current sampling data, it is output to AD conversion electricity
Road.
5. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 4, which is characterized in that
The signal conditioning circuit includes dual operational amplifier chip LM258, resistance R4, R5, R6, R7, R8 and capacitor C2, C3；
The amplifier 1 of LM258 and resistance R4, R5 and capacitor C2 constitute voltage follower, to voltage sample value carry out signal filtering and
Isolation；
The amplifier 2 and resistance R6, R7, R8 and capacitor C3 of LM258 constitutes difference amplifier, carries out signal filtering to current sampling data
And differential amplification；
It specifically connects and includes:
The pin 1 of LM258 is connected by the pin 2 of resistance R5 and LM258, and for exporting the voltage detection signal after improving
To A/D converter circuit；
The pin 3 of LM258 is connected by the output end of resistance R4 and voltage detecting circuit, and is grounded by capacitor C2；
The pin 4 of LM258 is grounded；
The pin 5 of LM258 is connected by the output end of resistance R6 and current detection circuit, and is grounded by capacitor C3；
The pin 6 of LM258 passes through resistance R7 connection+2.5V power supply；
The pin 7 of LM258 is connected by the pin 6 of resistance R8 and LM258, and for exporting the current detection signal after improving
To A/D converter circuit；
The pin 8 of LM258, connects+5V power supply.
6. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 4, which is characterized in that
The single-chip microcontroller is ATmega128.
7. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 6, which is characterized in that
The A/D converter circuit is using the ADC module embedded in single chip computer AT mega128.
8. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 6, which is characterized in that
The display component is OCMJ4X8C_3 type liquid crystal display or three Digital sum pipes.
9. the non-contact current detection type electrical quantity measurement arrangement of pipe detector according to claim 8, which is characterized in that
It further include being supplied to voltage detecting circuit, current detection circuit, signal conditioning circuit, A/D converter circuit, single-chip microcontroller and display component
The voltage conversion circuit of electricity, the voltage conversion circuit includes DC-DC module 1 and DC-DC module 2；
The positive and negative electrode of the input terminal connection battery pack of the DC-DC module 1, output+5V arrive current detection circuit, signal condition
Circuit and display component power supply；Meanwhile the 1 output+5V of DC-DC module arrives DC-DC module 2；The output of DC-DC module 2+
3.3V voltage is powered to single-chip microcontroller, exports the reference voltage of+2.5V voltage to signal conditioning circuit as differential amplifier circuit.
10. pipe detector according to claim 9 is existed with non-contact current detection type electrical quantity measurement arrangement, feature
In the DC-DC module 1 realizes decompression transformation using DC/DC chopper circuit；The DC-DC module 2 by AMS1117 and
Peripheral circuit is realized to be converted from+5V to 3.3V ,+5V to the voltage of 2.5V.
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| CN202903233U (en) * | 2012-07-04 | 2013-04-24 | 中国石油天然气股份有限公司 | System for automatically monitoring the parameters of a low temperature type buried oil and gas pipeline |
| CN203705621U (en) * | 2014-03-14 | 2014-07-09 | 重庆先锋渝州电器有限公司 | Metering circuit of residual capacity of battery pack |
| CN104052120A (en) * | 2014-06-20 | 2014-09-17 | 东北大学 | Power supply monitoring method and system of detector in petroleum pipeline with self-generating system |
| CN205404760U (en) * | 2015-12-25 | 2016-07-27 | 重庆恩信科技有限公司 | Battery intelligent online monitoring system |
| CN206400074U (en) * | 2016-12-21 | 2017-08-11 | 山东大学 | A kind of high-precision power battery pack data collecting system |
| CN209198539U (en) * | 2018-10-31 | 2019-08-02 | 中海油能源发展股份有限公司 | A kind of non-contact current detection type electrical quantity measurement arrangement of pipe detector |
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Effective date of registration: 20230103 Address after: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Applicant after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Applicant after: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Applicant after: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY Co.,Ltd. Address before: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Applicant before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Applicant before: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Applicant before: CNOOC PETROLEUM TECHNOLOGY DETECTION CO.,LTD. |