CN108593959A - A kind of transmitting detection circuit based on ADCP systems - Google Patents
A kind of transmitting detection circuit based on ADCP systems Download PDFInfo
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- CN108593959A CN108593959A CN201810602087.8A CN201810602087A CN108593959A CN 108593959 A CN108593959 A CN 108593959A CN 201810602087 A CN201810602087 A CN 201810602087A CN 108593959 A CN108593959 A CN 108593959A
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- 230000005888 antibody-dependent cellular phagocytosis Effects 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 79
- 238000012545 processing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
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- 238000004146 energy storage Methods 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
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- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/241—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by using reflection of acoustical waves, i.e. Doppler-effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
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- Engineering & Computer Science (AREA)
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- Analogue/Digital Conversion (AREA)
Abstract
The present invention provides a kind of transmitting self-checking circuits based on ADCP systems.The circuit includes:Emitting voltage unit, voltage sampling unit, digital circuit board, transmitting driving unit and energy converter, the emitting voltage unit includes positive emitting voltage unit and negative emitting voltage unit, the positive emitting voltage unit is connected with the voltage sampling unit, the negative emitting voltage unit is connected with voltage sampling unit, the voltage sampling unit is connected with the transmitting driving unit, the digital circuit board is connected with the voltage sampling unit, the transmitting driving unit is connected with the energy converter, for driving the energy converter according to the voltage source of offer.The present invention can from which further follow that the current value of transmission channel by acquiring the parameter of emitting voltage, it can determine whether specially which module breaks down according to voltage value and current value, the detection for realizing radiating circuit has many advantages, such as to realize that simply easy to operation and hardware design complexity is small.
Description
Technical field
The present invention relates to water volume flow rate fields of measurement more particularly to a kind of transmitting detection circuits based on ADCP systems.
Background technology
ADCP, that is, acoustic Doppler fluid velocity profile instrument is a kind of measurement water volume flow rate based on acoustic Doppler principle development
Equipment.Sound wave is mainly emitted to waters to be measured by energy converter, sound wave generates reflection in waters to be measured.We pass through survey
Reflected acoustic signals are measured to calculate water volume flow rate.When energy converter emits sound wave to waters to be measured, energy converter can be sent out
Transmit-receive radio road drives, to launch sound wave.So being just particularly important to radiating circuit self-test, on the one hand we are using
Before ADCP products, can self-test first be carried out to our emission circuit system, we can know this equipment in advance in this way
It can work normally, avoid unnecessary measurement work.If another aspect equipment work is abnormal, we can position quickly again
To the place of problem, it is convenient to be brought to maintenance of equipment.Generally there are three units for the transmission channel of ADCP main products at present simultaneously
Composition：Emitting voltage generation unit emits driving unit and energy converter group unit, and each unit has many devices to constitute.
Even if the problem of navigating to radiating circuit in this way, it is also difficult to which it is which module is out of joint to navigate to.And currently on the market
ADCP products, some do not emit self-checking circuit, some have, and can only also do and simply identify whether it is that radiating circuit goes out a bit
Problem.Cannot further localizing emission system problem place.It can inevitably be brought not to the maintenance maintenance of later product in this way
Necessary trouble.
In view of this, it would be highly desirable to develop a kind of a kind of transmitting detection electricity based on ADCP systems that can be solved the above problems
Road.
Invention content
The purpose of the present invention aims to solve the problem that the above problem, to provide a kind of transmitting detection circuit based on ADCP systems.
To achieve the above object, the present invention also provides a kind of transmitting detection circuits based on ADCP systems.The circuit packet
It includes:Emitting voltage unit, voltage sampling unit, digital circuit board, transmitting driving unit and energy converter,
The emitting voltage unit includes positive emitting voltage unit and negative emitting voltage unit, the positive emitting voltage unit
It is connected with the voltage sampling unit, to provide positive emitting voltage source；The negative emitting voltage unit and voltage sampling unit
It is connected, to provide negative emitting voltage source；
The voltage sampling unit is connected with the transmitting driving unit, to acquire positive emitting voltage unit output respectively
The voltage signal of the positive voltage signal at end and negative emitting voltage unit output end；
The digital circuit board is connected with the voltage sampling unit, sample simultaneously in fact to control voltage sampling unit
The processing of existing sampled voltage signal；
The transmitting driving unit is connected with the energy converter, for driving the energy converter according to the voltage source of offer；
The energy converter is driven for passing through driving unit, realizes the transmitting of signal.
Preferably, the first sampling resistor network element includes the first sampling resistor, the first divider resistance, the second partial pressure
Resistance, third divider resistance, the 4th divider resistance, the first Zero-ohm resistor and the second Zero-ohm resistor, the first sampling electricity
Resistance one end is connected with positive emitting voltage unit output end and first divider resistance one end, the first divider resistance other end and second point
Piezoresistance one end is connected with first Zero-ohm resistor one end, second divider resistance other end ground connection；First sampling resistor is another
One end is connected with third divider resistance one end, the third divider resistance other end and the 4th divider resistance one end and the second zero ohms electricity
It hinders one end to be connected, the 4th divider resistance other end ground connection；
The second sampling resistor network element includes the second sampling resistor, the 5th divider resistance, the 6th divider resistance, the
Seven divider resistances, the 8th divider resistance, third Zero-ohm resistor and the 4th Zero-ohm resistor, second sampling resistor one end with
Negative emitting voltage unit output end and the 5th divider resistance one end are connected, the 5th divider resistance other end and the 6th divider resistance one
End is connected with third Zero-ohm resistor one end, the 6th divider resistance other end ground connection；The second sampling resistor other end and
Seven divider resistance one end are connected, the 7th divider resistance other end and the 8th divider resistance one end and the 4th Zero-ohm resistor one end phase
Even, the 8th divider resistance other end ground connection；
The AD sampling units and the first Zero-ohm resistor other end, the second Zero-ohm resistor other end, third zero ohms
The resistance other end, the 4th Zero-ohm resistor other end are respectively connected with, to acquire the voltage signal at each endpoint.
Preferably, the positive voltage of the positive emitting voltage unit output is 40V, and the negative emitting voltage unit output is born
Voltage is -40V.
Preferably, the AD sampling units are LTC1090 chips.
Preferably, the resistance value of first sampling resistor and the second sampling resistor is 0.5 ohm, the first divider resistance, the
Three divider resistances, the 5th divider resistance and the 7th divider resistance are 90K ohm, the second divider resistance, the 4th divider resistance,
Six divider resistances, the 8th divider resistance are 10K ohm.
The present invention can be obtained further by acquiring the parameter of positive emitting voltage unit and negative emitting voltage unit emitting voltage
The current value for going out transmission channel can determine whether specially which module breaks down according to voltage value and current value, realize transmitting electricity
The detection on road has and realizes simple, easy to operation advantage, will not bring too big hardware spending, will not give ADCP systems
Hardware design brings too big design complexities.
Description of the drawings
Fig. 1 is a kind of functional block diagram of transmitting detection circuit based on ADCP systems of the present invention；
Fig. 2 is a kind of voltage and current sample circuit figure of transmitting detection circuit based on ADCP systems of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be noted that attached drawing is merely illustrative, do not painted according to stringent ratio
It makes, and promising may wherein describe convenient and the partial enlargement of progress, diminution, may also have for conventional partial structure certain
It is default.
Fig. 1 is a kind of functional block diagram of transmitting detection circuit based on ADCP systems of the present invention.
As shown in Figure 1, the transmitting detection circuit based on ADCP systems of the present invention includes:Emitting voltage unit 1, voltage are adopted
Sample unit 2, digital circuit board 3, transmitting driving unit 4 and energy converter 5.
Emitting voltage unit 1 includes positive emitting voltage unit 11 and negative emitting voltage unit 12, positive emitting voltage unit 11
It is connected with voltage sampling unit 2, is responsible for providing positive emitting voltage source.Negative emitting voltage unit 12 is connected with voltage sampling unit 2,
It is responsible for providing and bears emitting voltage source.Positive emitting voltage unit in the present embodiment generates positive 40V voltages using DC-DC module and supplies
Electricity bears emitting voltage unit and generates negative 40V power voltage supplies using DC-DC module.
Voltage sampling unit 2 is connected with transmitting driving unit 4, is mainly responsible for positive 11 output end of emitting voltage unit of acquisition
Positive voltage signal and negative 12 output end of emitting voltage unit voltage signal.
Digital circuit board 3 is connected with voltage sampling unit 2, is mainly responsible for control voltage sampling unit 2 and is sampled simultaneously
Realize the processing of sampled voltage signal.
Transmitting driving unit 4 is connected with energy converter 5, for driving energy converter 5 according to the voltage source of offer.Energy converter 5 is logical
Over-drive unit is driven, and realizes the transmitting of signal.
When work, required emitting voltage is generated by positive emitting voltage unit 11 and negative emitting voltage unit 12 first, then
Emitting voltage is stored by energy storage device, emitting driving unit 4 at this time will work and emitting voltage before is loaded in transducing
On device 5 (quantity of the ADCP energy converters of different model is different), and this energy converter 5 is driven to work, to by 5 generation sound of energy converter
Wave completes emission process.During this period, it controls voltage sampling unit 2 by digital circuit board 3 to work, passes through voltage sampling unit 2
The state of electric current when monitoring the size of emitting voltage, and then learning transmitting, can be achieved with by two parameters of voltage and current to hair
The real-time monitoring of transmit-receive radio road.
In one embodiment, as shown in Fig. 2, voltage sampling unit 2 includes the first sampling resistor network element 21, second
Sampling resistor network element 22 and AD sampling units 23.
First sampling resistor network element 21 includes the first sampling resistor R8, the first divider resistance R6, the second divider resistance
R1, third divider resistance R2, the 4th divider resistance R7, the first Zero-ohm resistor R5 and the second Zero-ohm resistor R4.First sampling
The one end resistance R8 is connected with positive emitting voltage unit output end and first one end divider resistance R6, the first divider resistance R6 other ends
It is connected with second one end divider resistance R1 and first one end Zero-ohm resistor R5, second divider resistance R1 other ends ground connection.First
The sampling resistor R8 other ends are connected with the one end third divider resistance R2, the third divider resistance R2 other ends and the 4th divider resistance R7
One end is connected with second one end Zero-ohm resistor R4, the 4th divider resistance R7 other ends ground connection.
Second sampling resistor network element 22 includes the second sampling resistor R19, the 5th divider resistance R17, the 6th partial pressure electricity
Hinder R11, the 7th divider resistance R12, the 8th divider resistance R18, third Zero-ohm resistor R16 and the 4th Zero-ohm resistor R15.The
Two one end sampling resistor R19 are connected with negative emitting voltage unit output end and the 5th one end divider resistance R17, the 5th divider resistance
The R17 other ends are connected with the 6th one end divider resistance R11 and the one end third Zero-ohm resistor R16, and the 6th divider resistance R11 is another
End ground connection.The second sampling resistor R19 other ends are connected with the 7th one end divider resistance R18, the 7th divider resistance R18 other ends with
8th one end divider resistance R12 is connected with the 4th one end Zero-ohm resistor R15, the 8th divider resistance R12 other ends ground connection.
It is 14 AD that AD sampling units 23, which use LTC1090 chips, the chip, and AD input ranges are positive and negative 5V, and can
To realize that 4 sampling channel samplings, the pin 2 (CH0) of AD sampling A/D chips connect with the first Zero-ohm resistor R5 other ends, are used for
Acquire the voltage value V1 of the endpoint；The pin 3 (CH1) of AD sampling A/D chips and the second Zero-ohm resistor R4 other ends, for acquiring
The voltage value V2 of the endpoint；The pin 4 (CH2) of AD sampling A/D chips and the third Zero-ohm resistor R4 other ends, for acquiring the end
The voltage value V3 of point；The pin 4 (CH3) of AD sampling A/D chips and the 4th Zero-ohm resistor R4 other ends, for acquiring the endpoint
Voltage value V4.The 15-19 pins of AD sampling units 23 are connected with digital circuit board, and microcontroller may be used in digital circuit board
(MCU) connect with this AD.
Wherein the first sampling resistor R8, the second sampling resistor R19 resistance value preferably select the resistance of a little bigger resistance value, do so
Benefit be that the pressure difference at resistance both ends can be made big, be convenient for A/D chip sampling.The resistance of 0.5 ohm of selection, precision are herein
1%.The emitting voltage of another aspect ADCP systems is designed as positive and negative 40V, and emission current is about positive and negative 2A, in this way in sampling resistor
The voltage difference at both ends is about 1V, so need to add two resistance to be divided respectively at 0.5 ohm of resistance both ends, it is otherwise just super
Go out the input range of A/D chip sampling.For ease of calculation, in one embodiment, divider resistance resistance value is selected as shown to be
90K and 10K.At this time by calculating V1, V2, V3 in figure, the voltage value of V4 should be in positive and negative 4V or so, so the input of AD samplings
Range should be set in positive and negative 5V, meet design requirement.
When detecting radiating circuit, it can be sampled by chip AD7606-4 and obtain synchronization V1, V2, V3, V4 value.From
And it can be further by obtaining the voltage Vb=of voltage Va=((R11+R17)/R11) * V3 and B points of A points according to circuit counting
((R12+R18)/R12)*V4.Va is that we emit negative value at this time, and (Va-Vb)/R19 is the electric current of negative transmitting terminal
Value.The voltage and current value of positive transmitting terminal similarly can be obtained.So far we can be judged by the numerical value of emitting voltage electric current
The state of transmission channel, to realize transmitter self-test scheme.The calculating process can be realized by manually calculating, and can also be led to
The program of digital circuit board insertion is crossed to realize, embedded program is addition subtraction multiplication and division method calculation procedure common at present certainly, should
The main points of calculation procedure and non-present invention design.
As described above, by the voltage difference of above-mentioned the first sampling resistor obtained and the second sampling resistor both ends, this is obtained
When emitting voltage value and transmission channel at this time current value.If the voltage value sampled at this time is not right, and at this time
Current value very little is likely to be then that emitting voltage module is broken；If the voltage value that our samplings obtain at this time is not right, and this
When current value it is very big be likely to be then that transmitting drive module is broken；If our sampling at this time obtain voltage value be to
But the power that voltage value and current value calculate is not within the scope of our former design power, it is likely that is that energy converter does not connect
Caused (for example ADCP is made of four energy converters, the power of each energy converter is 20W, if some energy converter does not connect
Power good then that 20W can be lacked).
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of transmitting detection circuit based on ADCP systems, which is characterized in that including:Emitting voltage unit, voltage sample list
Member, digital circuit board, transmitting driving unit and energy converter,
The emitting voltage unit includes positive emitting voltage unit and negative emitting voltage unit, the positive emitting voltage unit and institute
It states voltage sampling unit to be connected, to provide positive emitting voltage source；The negative emitting voltage unit is connected with voltage sampling unit,
To provide negative emitting voltage source；
The voltage sampling unit is connected with the transmitting driving unit, to acquire positive emitting voltage unit output end respectively
The voltage signal of positive voltage signal and negative emitting voltage unit output end；
The digital circuit board is connected with the voltage sampling unit, is sampled and is realized controlling voltage sampling unit and adopted
The processing of sample voltage signal；
The transmitting driving unit is connected with the energy converter, for driving the energy converter according to the voltage source of offer；
The energy converter is driven for passing through driving unit, realizes the transmitting of signal.
2. a kind of transmitting detection circuit based on ADCP systems according to claim 1, which is characterized in that the voltage is adopted
Sample unit includes the first sampling resistor network element, the second sampling resistor network element and AD sampling units,
The first sampling resistor network element includes the first sampling resistor, the first divider resistance, the second divider resistance, third point
Piezoresistance, the 4th divider resistance, the first Zero-ohm resistor and the second Zero-ohm resistor, first sampling resistor one end and positive hair
Voltage cell output end and first divider resistance one end is penetrated to be connected, the first divider resistance other end and second divider resistance one end and
First Zero-ohm resistor one end is connected, second divider resistance other end ground connection；The first sampling resistor other end and third point
Piezoresistance one end is connected, and the third divider resistance other end is connected with the 4th divider resistance one end and second Zero-ohm resistor one end,
The 4th divider resistance other end is grounded；
The second sampling resistor network element include the second sampling resistor, the 5th divider resistance, the 6th divider resistance, the 7th point
Piezoresistance, the 8th divider resistance, third Zero-ohm resistor and the 4th Zero-ohm resistor, second sampling resistor one end and negative hair
Voltage cell output end and the 5th divider resistance one end is penetrated to be connected, the 5th divider resistance other end and the 6th divider resistance one end and
Third Zero-ohm resistor one end is connected, the 6th divider resistance other end ground connection；The second sampling resistor other end and the 7th point
Piezoresistance one end is connected, and the 7th divider resistance other end is connected with the 8th divider resistance one end and the 4th Zero-ohm resistor one end,
The 8th divider resistance other end is grounded；
The AD sampling units and the first Zero-ohm resistor other end, the second Zero-ohm resistor other end, third Zero-ohm resistor
The other end, the 4th Zero-ohm resistor other end are respectively connected with, to acquire the voltage signal at each endpoint.
3. a kind of transmitting detection circuit based on ADCP systems according to claim 1, which is characterized in that the positive transmitting
The positive voltage of voltage cell output is 40V, and the negative voltage of the negative emitting voltage unit output is -40V.
4. a kind of transmitting detection circuit based on ADCP systems according to claim 2, which is characterized in that the AD samplings
Unit is LTC1090 chips.
5. a kind of transmitting detection circuit based on ADCP systems according to claim 2, which is characterized in that described first adopts
The resistance value of sample resistance and the second sampling resistor be 0.5 ohm, the first divider resistance, third divider resistance, the 5th divider resistance and
7th divider resistance is 90K ohm, and the second divider resistance, the 4th divider resistance, the 6th divider resistance, the 8th divider resistance are equal
It is 10K ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602087.8A CN108593959A (en) | 2018-06-12 | 2018-06-12 | A kind of transmitting detection circuit based on ADCP systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602087.8A CN108593959A (en) | 2018-06-12 | 2018-06-12 | A kind of transmitting detection circuit based on ADCP systems |
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| CN108593959A true CN108593959A (en) | 2018-09-28 |
Family
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008004560A1 (en) * | 2006-07-04 | 2008-01-10 | Yasushi Takeda | Flow velocity measurement device and ultrasonic flow rate meter |
| CN101461724A (en) * | 2008-12-30 | 2009-06-24 | 深圳市蓝韵实业有限公司 | Doppler ultrasonic imaging system transmitting power supply monitoring device |
| CN104068888A (en) * | 2013-03-09 | 2014-10-01 | 佳能株式会社 | Detection circuit, driving method, probe, and subject information acquiring apparatus |
| CN105911147A (en) * | 2016-06-30 | 2016-08-31 | 湘潭大学 | Intelligent sound wave scanning detector and detection method |
| CN107070229A (en) * | 2016-12-20 | 2017-08-18 | 南京海普水文科技有限公司 | A kind of ADCP transmitting source levels conditioned circuit and method |
| CN108054728A (en) * | 2017-12-08 | 2018-05-18 | 珠海格力电器股份有限公司 | A kind of current protective device, compressor circuit and its current protection method |
| CN208207003U (en) * | 2018-06-12 | 2018-12-07 | 南京海普水文科技有限公司 | A kind of transmitting detection circuit based on ADCP system |
-
2018
- 2018-06-12 CN CN201810602087.8A patent/CN108593959A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008004560A1 (en) * | 2006-07-04 | 2008-01-10 | Yasushi Takeda | Flow velocity measurement device and ultrasonic flow rate meter |
| CN101461724A (en) * | 2008-12-30 | 2009-06-24 | 深圳市蓝韵实业有限公司 | Doppler ultrasonic imaging system transmitting power supply monitoring device |
| CN104068888A (en) * | 2013-03-09 | 2014-10-01 | 佳能株式会社 | Detection circuit, driving method, probe, and subject information acquiring apparatus |
| CN105911147A (en) * | 2016-06-30 | 2016-08-31 | 湘潭大学 | Intelligent sound wave scanning detector and detection method |
| CN107070229A (en) * | 2016-12-20 | 2017-08-18 | 南京海普水文科技有限公司 | A kind of ADCP transmitting source levels conditioned circuit and method |
| CN108054728A (en) * | 2017-12-08 | 2018-05-18 | 珠海格力电器股份有限公司 | A kind of current protective device, compressor circuit and its current protection method |
| CN208207003U (en) * | 2018-06-12 | 2018-12-07 | 南京海普水文科技有限公司 | A kind of transmitting detection circuit based on ADCP system |
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