CN107085242A - A kind of contactless winter bamboo shoot detection device and method - Google Patents
A kind of contactless winter bamboo shoot detection device and method Download PDFInfo
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- CN107085242A CN107085242A CN201710401160.0A CN201710401160A CN107085242A CN 107085242 A CN107085242 A CN 107085242A CN 201710401160 A CN201710401160 A CN 201710401160A CN 107085242 A CN107085242 A CN 107085242A
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- 241001330002 Bambuseae Species 0.000 title claims abstract description 82
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 81
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 81
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 81
- 239000011425 bamboo Substances 0.000 title claims abstract description 81
- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title description 6
- 239000002689 soil Substances 0.000 claims abstract description 26
- 239000000523 sample Substances 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000002452 interceptive effect Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 210000002615 epidermis Anatomy 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000035772 mutation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 208000031968 Cadaver Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/081—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the magnetic field is produced by the objects or geological structures
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Abstract
The invention discloses a kind of contactless winter bamboo shoot detection device, probe unit including producing detectable signal, display unit, result of detection is judged according to detectable signal and result of detection is driven the control unit to display unit, the probe unit includes the signal projector for producing the primary magnetic field that magnetic field intensity is changed over time and the signal receiver for receiving primary sound magnetic field signal and the secondary magnetic field signal induced by primary magnetic field in soil；The contactless winter bamboo shoot detection device of the present invention is simple in construction, convenient to carry and move in the measurements, is easy to field to use；Instrumentation is simple simultaneously, and intelligence degree is high, infringement bamboo shoots with it is rhizomatous in the case of can effectively detect bamboo shoots.
Description
Technical field
The present invention relates to underground corps detection technology field, more particularly to a kind of contactless winter bamboo shoot detection device and side
Method.
Background technology
Winter bamboo shoot are the bamboo shoot buds of the beginning of autumn front and rear subterranean stem (bamboo whip) lateral bud development by mao bamboon (bamboo), and Yin Shangmo goes out
Soil, bamboo shoot matter children is tender, is the dish that one of people extremely likes eating.In addition, the nutritive value of winter bamboo shoot is very high, have " golden clothing white jade,
One is exhausted in vegetable " good reputation.But, because it will not get out ground before spring next year is warm, therefore it is higher to excavate difficulty.People are only
Can by earth's surface whether have protuberance with cracking feature, the leaf of bamboo deviation etc. experience judged, this result in dig bamboo shoot people often sentence
Dislocation is missed, and accidentally injures bamboo shoots subterranean stem, the development of influence bamboo shoots and the yield of bamboo shoots, and it is again low to take the laborious efficiency of labor.
At present, the Winter bamboo shoot detecting instrument of existing resistance-type or electrical conductivity needs that many underground will be inserted with probe.For example
The A of application publication number CN 102788996 patent document discloses a kind of resistance-type winter bamboo shoot detector, by battery direct current supply
Circuit, grounding resistance detection circuit, single chip machine controlling circuit, digital pipe display circuit and acousto-optic bulletin circuit composition；Also shell
Digitron display screen, acoustical generator or photophore, store button, display mode control button and battery main switch on body, housing；
Housing bottom surface is equipped with both positive and negative polarity probe.The detector, which has, automatically processes correlated digital harmony lightshow function, is touched suitable for getting up early
Used during black, dark with the bamboo shoot agriculture of dysphotia；Detection is reliable, it is to avoid disorderly digging makes forest land riddled with gaping wounds, the disconnected subterranean stem of pick
The problem of with the yield for digging broken bamboo shoot body, influence bamboo shoot and bamboo, occurs, and digging bamboo shoot work efficiency is high, simple to operate, low manufacture cost.
In another example the A of application publication number CN 104635279 patent document discloses a kind of separate type ultrasonic wave and ground resistance
Complementary Winter bamboo shoot detecting instrument, by storage battery power supply circuit, ultrasonic listening circuit, single-chip ultrasonic ripple filtering process, grounding resistance
Detection circuit, single chip machine controlling circuit, LED display circuit, ultrasonic signal bulletin lamp and electric signal bulletin circuit composition；Glass
Glass steel plate, glass epoxy surface have binding post, glass epoxy bottom surface to be connect equipped with both positive and negative polarity probe, on negative probe equipped with ultrasonic wave
Receive and ultrasonic transmitter is housed on the positive probe of device and diagonally opposing corner；Display system have LED display,
Ultrasonic wave bulletin lamp, electric signal bulletin lamp and battery main switch.The Winter bamboo shoot detecting instrument is exclusively used in underground winter bamboo shoot detection,
Self-employed worker and enterprise are planted suitable for winter bamboo shoot；This survey meter has detection accuracy high, digs bamboo shoot efficiency high, simple to operate, cost of manufacture
Low, environment-adapting ability is strong, can Intelligent treatment data the advantages of.
But said apparatus easily causes damage to winter bamboo shoot and subterranean stem, and detection is required for plugging probe every time, uses work
Sequence is relatively complicated, wastes time and energy.
The content of the invention
, can be in the case of not damaging bamboo shoots and be rhizomatous the invention provides a kind of contactless winter bamboo shoot detection device
Effectively detect bamboo shoots.
A kind of contactless winter bamboo shoot detection device, including produce the probe unit of detectable signal, display unit, according to detection
Signal judges result of detection and result of detection is driven into the control unit to display unit, and the probe unit includes producing magnetic field
The signal projector in the primary magnetic field that intensity is changed over time and receive primary sound magnetic field signal and by primary magnetic field in soil
In the signal receiver of secondary magnetic field signal that induces.
And primary sound magnetic field signal and secondary magnetic field signal are delivered to control unit, control unit control display unit work
Make.
The present invention uses contactless probe unit, and bamboo shoot are determined whether by the change in magnetic field in soil.
Signal projector produces the primary magnetic field that magnetic field intensity is changed over time, and primary magnetic field is with the increase of depth of soil
Gradually weaken, the primary magnetic field of change makes occur faint induced-current in soil, so as to induce secondary magnetic field, signal is received
Device had not only received primary Magnetic Field but also had received secondary magnetic field information.Because the organic matter such as winter bamboo shoot epidermis and its internal bamboo fibre hinders
Electric current conduction can cause relatively low electrical conductivity, therefore the electrical conductivity of winter bamboo shoot compares time having around mutation, i.e. winter bamboo shoot compared with surrounding soil
The ratio of magnetisation field signal and primary sound magnetic field signal is changed, and calculation control unit sets threshold value to realize according to the variable signal
Control display unit alarm indication has bamboo shoot.
The display unit can use the man-machine interactive system with a variety of functions, with display screen, can quickly have
Effect ground shows result of detection to user.
In order to improve sensitivity and the accuracy of detection, it is preferred that the spacing of the signal projector and signal receiver
For 40~80cm.It is further preferred that the spacing of the signal projector and signal receiver is 60~80cm.Further preferably
, the spacing of the signal projector and signal receiver is 40~60cm.In order to avoid the interference of reflection electromagnetic wave, signal connects
Receiving device needs to leave signal generation end certain distance.Simultaneously as instrument detection be signal occur end and signal receiving end it
Between soil average conductivity, therefore between the two away from also should not too far, otherwise can cause bamboo shoots detection sensitivity reduction, even
It can not be detected.
In order to improve the accuracy of detection, it is preferred that the working frequency of the signal projector is 13kHz~16kHz.By
Used in the wild in apparatus of the present invention, supply voltage is generally 12V, be commonly used for chargeable lithium cell, generally pass through voltage
12V direct currents to be powered after voltage to control unit, exchange are converted to by inverter circuit by 12V photovoltaic conversions by change-over circuit
Signal projector is supplied after electricity, the primary magnetic field of sufficient intensity can be produced by setting above-mentioned working frequency, to improve Detection results.
In order to simplify structure and be easy to manufacture, it is preferred that the signal projector includes alternating current generator and hair
Ray circle.It is preferred that, the signal receiver is receiving coil.The signal projector is transmitting coil, by the alternation passed through
The primary magnetic field that current induced magnetic field intensity is changed over time, the signal receiver is receiving coil, for receiving the position
The secondary magnetic field signal produced by primary induced by magnetic field, secondary magnetic field signal inputs described control unit after A/D is changed, warp
Cross output after calculating judges whether there is bamboo shoots signal to display unit.
Manufacture is installed and carried for convenience, and the present invention also carries the brace of adjustable in length.
The invention also discloses a kind of contactless winter bamboo shoot detection method, detected and filled using above-mentioned contactless winter bamboo shoot
Put, comprise the following steps：
Step 1：It is being to produce what magnetic field intensity was changed over time at 2~5cm apart from ground level by signal projector
Primary magnetic field；
Step 2：It is being primary sound magnetic field signal to be received at 2~5cm and by original apart from ground level by signal projector
The secondary magnetic field signal that magnetisation field is induced in soil；
Step 3：Control unit is compared according to secondary magnetic field signal and primary sound magnetic field signal with default threshold value, is judged
Detection ground whether has bamboo shoot and result of detection is driven to display unit；
Step 4：Display unit has displayed whether bamboo shoot.
Accuracy is calculated and improved to be more convenient for, it is preferred that in step 3, control unit is according to secondary magnetic field signal
With primary sound magnetic field signal and concretely comprising the following steps that default threshold value is compared：
3-1, control unit calculate target conductivity EC according to secondary magnetic field signal and primary sound magnetic field signal, and calculation formula is such as
Under：
Wherein,
EC is soil apparent electrical conductivity, unit S/m；
Hs、HpRespectively secondary magnetic field and primary magnetic field intensity；
F is tranmitting frequency, unit Hz；
S is the spacing of signal projector and signal receiver, unit m；
μ0For the empty detecting field coefficient of conductivity.
The threshold value a set in 3-2, control unit is (2~10) * 10-3S/m, threshold value b are (1~2) * 10-3S/m, works as meter
When obtained target conductivity EC meets condition b ＜ EC ＜ a, control unit is determined as there are bamboo shoot, and output judging result signal is extremely
To display unit.
Target conductivity is measured using electromagnetic induction principle, and then determines whether winter bamboo shoot.Signal projector produces magnetic field
The primary magnetic field that intensity is changed over time and gradually weakened with the increase of depth of soil, variation magnetic field makes to occur in soil faint
Induced-current, so as to induce secondary magnetic field, signal receiver had not only received primary Magnetic Field but also had received secondary magnetic field information.
The output signal of signal receiver is converted into target conductivity by control unit.Generally, primary magnetic field and secondary magnetic field are two
The complicated function of terminal spacing, ac frequency and target conductivity, and secondary magnetic field and the ratio and electricity of primary magnetic field intensity
Conductance is in linear relation.Determine whether that bamboo shoot can improve accuracy by calculating electrical conductivity.This be due to winter bamboo shoot epidermis and
The organic matters such as its internal bamboo fibre hinder electric current conduction to cause relatively low electrical conductivity, therefore the electrical conductivity of winter bamboo shoot is compared with surrounding soil phase
Than there is mutation.General soil conductivity value is more than 20*10-3S/m, winter bamboo shoot electrical conductivity is less than 2*10-3S S/m, and the conductance of rock
Rate is almost 0, less than the accuracy of detection of the present invention, it is possible to can determine that in soil whether there is winter bamboo shoot according to electrical conductivity.
Beneficial effects of the present invention：
The contactless winter bamboo shoot detection device of the present invention is simple in construction, convenient to carry and move in the measurements, is easy to field
Use；Instrumentation is simple simultaneously, and intelligence degree is high, infringement bamboo shoots with it is rhizomatous in the case of can effectively detect bamboo
Bamboo shoot.
Brief description of the drawings
Fig. 1 is the structural representation of the contactless winter bamboo shoot detection device of the present invention.
Fig. 2 is the circuit block line chart of the contactless winter bamboo shoot detection device of the present invention.
Fig. 3 is the measuring principle figure of the contactless winter bamboo shoot detection device of the present invention.
Wherein, 1, signal receiver；2nd, signal projector；3rd, casing；4th, brace；5th, the first brace fixing end；6th, second
Brace fixing end；7th, brace length-adjustment buckle；8th, button is operated；9 displays；10th, battery charging port；11st, man-machine interactive system；
12nd, power supply；13rd, voltage conversion circuit；14th, control unit；15th, A/D change-over circuits；16th, inverter circuit；17th, soil.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples：
As shown in figs. 1 and 2, the contactless winter bamboo shoot detection device of the present embodiment includes hardware components and circuit part, its
In, hardware components include casing 3, signal projector 2, signal receiver 1, brace 4, the first brace fixing end 5, the second brace and consolidated
Fixed end 6, brace length-adjustment buckle 7 and man-machine interactive system 11；Man-machine interactive system 11 include display 9, operation button 8 and
Battery charging port 10.
Circuit part mainly includes power supply 12, voltage conversion circuit 13, control unit 14, A/D change-over circuits 15, inversion electricity
Road 16；Power supply 12 uses 12V chargeable lithium cells, and 12V photovoltaic conversions are single to control after 5V voltages by voltage conversion circuit 13
Member 14 is powered；12V direct currents are converted to supply signal projector 2 after alternating current by inverter circuit 16；Ac frequency can be in people
Set and change in machine interactive system, working frequency of the present invention is 13kHz~16kHz；The signal that signal receiver 1 is gathered is through A/D
Control unit 14 is inputted after change-over circuit 15, control unit 14 is logical after the data signal collected is carried out data processing and judged
The display 9 crossed in man-machine interactive system 11 shows result.Circuit part is placed in inside casing 3, and man-machine interactive system 11 is located at
Above casing, it is connected with control unit 14, with Regulate signal emission parameter and no winter bamboo shoot information can be shown.
Brace 4 is detachable, and its two ends is attached separately to after the first brace fixing end 5 and the second brace fixing end 6 convenient carrying
And movement, brace 4 can pass through brace length-adjustment buckle 7 adjust brace length.In the present embodiment, the He of the first brace fixing end 5
The spacing of second brace fixing end 6 is 60cm.The spacing of signal projector 2 and signal receiver 1 is also 60cm.
As shown in figure 3, the present embodiment is detected using electromagnetic induction principle measurement target conductivity.In the present embodiment
In, it is primary that signal projector 2 (Tx) generation magnetic field intensity is changed over time and gradually weakened with the increase of the depth of soil 17
Magnetic field (Hp), variation magnetic field makes occur faint induced-current in soil 17, so as to induce secondary magnetic field (Hs), signal is received
Device 1 (Rx) had not only received primary Magnetic Field but also had received secondary magnetic field information.Control unit 14 is by the output signal of signal receiver 1
It is converted into target conductivity.Generally, primary magnetic field and secondary magnetic field are two-terminal spacing, ac frequency and target conductivity
Complicated function, and secondary magnetic field and the ratio and electrical conductivity of primary magnetic field intensity are in linear relation, and target conductivity can be with table
It is shown as：
Wherein, EC is soil apparent electrical conductivity (S/m)；Hs, Hp are respectively secondary magnetic field and primary magnetic field intensity；F is hair
Radio frequency rate (Hz)；S is distance (m) between signal receiver 1 and signal projector 2；μ0For the empty detecting field coefficient of conductivity.
It can cause relatively low electrical conductivity because the organic matter such as winter bamboo shoot epidermis and its internal bamboo fibre hinders electric current to conduct, therefore the winter
The electrical conductivity of bamboo shoot is compared compared with surrounding soil mutation.General soil conductivity value is more than 20*10-3S/m, winter bamboo shoot electrical conductivity is less than 2*
10-3S/m, and the electrical conductivity of rock is almost 0, less than the accuracy of detection of the present invention, it is possible to can determine that soil according to electrical conductivity
Whether there are winter bamboo shoot in earth.
In the present embodiment, control unit 14 uses the button 8 in the single-chip microcomputer of AT89S51 types 51, man-machine interactive system 11 to adopt
With key switch k1, k2, k3, k4, it is connected on P1.0, P1.1, P1.2, P1.3 mouth of single-chip microcomputer.Man-machine interaction system
Display 9 in system 11 uses QC12864B LCDs, and I/O mouthfuls of DB0~DB7 of its Data meet the P0.0 of single-chip microcomputer respectively
~P0.7 mouthfuls, W, E, RST mouthfuls of RS, R connects P2.0~P2.3 mouths of single-chip microcomputer respectively.Inverter circuit 16 by IRFU020 types metal-
The switch of oxide semiconductor field effect pipe (MOSFET) produces the electric current of exchange change, and MOSFET pipes are directly given birth to by AT89S51
Into pwm signal driving, pwm signal by single-chip microcomputer P2.7 mouths output.The drain electrode of MOSFET pipes connects 12V supply voltages, source class
Connect signal projector 1.A/D change-over circuits 15 are using 8 low-power consumption analog-digital converter PCF8951, and wherein AIN0 mouthfuls connects signal and connect
Device 2 is received, AOUT mouthfuls connect single-chip microcomputer P1.4 pins.Voltage conversion circuit 13 is straight using constant-current decompression chip LM7805 voltage stabilizings output 5V
Flow voltage.Wherein, Vin is 12V lithium battery input voltages, and Vcc is 5V input voltages after voltage conversion circuit 13 is changed.
Using the present embodiment detection winter bamboo shoot when, its operating process is as follows：
Power switch in the first step, push button 8, opens machine；
Second step, sets the working frequency of machine；
3rd step, lifting brace 4 makes signal projector 2 and signal receiver 1 towards ground, and with 2~5cm of ground distance；
4th step, observes display 9 when finding, such as finds winter bamboo shoot, display 9 can point out, then can excavate soil, obtain
Take winter bamboo shoot.
For those skilled in the art, technical scheme that can be as described above and design, make other each
It is kind corresponding to change and deform, and all these change and deformation should all belong to the protection model of the claims in the present invention
Within enclosing.
Claims (7)
1. a kind of contactless winter bamboo shoot detection device, including the probe unit of detectable signal is produced, display unit is believed according to detection
Number judge result of detection and result of detection is driven the control unit to display unit, it is characterised in that the probe unit bag
Include the signal projector for producing the primary magnetic field that magnetic field intensity is changed over time and reception primary sound magnetic field signal and by primary
The signal receiver for the secondary magnetic field signal that magnetic field is induced in soil.
2. contactless winter bamboo shoot detection device as claimed in claim 1, it is characterised in that the signal projector and signal connect
The spacing for receiving device is 40~80cm.
3. contactless winter bamboo shoot detection device as claimed in claim 1, it is characterised in that the work frequency of the signal projector
Rate is 13kHz~16kHz.
4. contactless winter bamboo shoot detection device as claimed in claim 1, it is characterised in that the signal projector includes alternation
Current feedback circuit and transmitting coil.
5. contactless winter bamboo shoot detection device as claimed in claim 1, it is characterised in that the signal receiver is reception line
Circle.
6. a kind of contactless winter bamboo shoot detection method, it is characterised in that using as described in Claims 1 to 5 any claim
Contactless winter bamboo shoot detection device, comprise the following steps：
Step 1：By signal projector apart from ground level be 2~5cm locate generation magnetic field intensity change over time it is primary
Magnetic field；
Step 2：It is being primary sound magnetic field signal to be received at 2~5cm and by primary magnetic apart from ground level by signal projector
The secondary magnetic field signal that field is induced in soil；
Step 3：Control unit is compared according to secondary magnetic field signal and primary sound magnetic field signal with default threshold value, judges detection
Whether ground has bamboo shoot and result of detection is driven to display unit；
Step 4：Display unit has displayed whether bamboo shoot.
7. contactless winter bamboo shoot detection device as claimed in claim 6, it is characterised in that in step 3, control unit is according to secondary
Magnetisation field signal and primary sound magnetic field signal and concretely comprising the following steps that default threshold value is compared：
3-1, control unit calculate target conductivity EC according to secondary magnetic field signal and primary sound magnetic field signal, and calculation formula is as follows：
<mrow>
<mi>E</mi>
<mi>C</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mn>2</mn>
<msub>
<mi>H</mi>
<mi>s</mi>
</msub>
</mrow>
<mrow>
<msub>
<mi>&pi;H</mi>
<mi>p</mi>
</msub>
<msub>
<mi>f&mu;</mi>
<mn>0</mn>
</msub>
<msup>
<mi>S</mi>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</mrow>
Wherein,
EC is soil apparent electrical conductivity, unit S/m；
Hs、HpRespectively secondary magnetic field and primary magnetic field intensity；
F is tranmitting frequency, unit Hz；
S is the spacing of signal projector and signal receiver, unit m；
μ0For the empty detecting field coefficient of conductivity.
The threshold value a set in 3-2, control unit is (2~10) * 10-3S/m, threshold value b are (1~2) * 10-3S/m, when calculating is obtained
Target conductivity EC when meeting condition b ＜ EC ＜ a, control unit is determined as there are bamboo shoot, and output judging result signal is to display
Unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401160.0A CN107085242A (en) | 2017-05-31 | 2017-05-31 | A kind of contactless winter bamboo shoot detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401160.0A CN107085242A (en) | 2017-05-31 | 2017-05-31 | A kind of contactless winter bamboo shoot detection device and method |
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| CN107085242A true CN107085242A (en) | 2017-08-22 |
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| CN201710401160.0A Pending CN107085242A (en) | 2017-05-31 | 2017-05-31 | A kind of contactless winter bamboo shoot detection device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814160A (en) * | 2019-03-07 | 2019-05-28 | 浙江农林大学 | Integrated vehicle is excavated in winter bamboo shoot detection |
| CN112327059A (en) * | 2020-08-12 | 2021-02-05 | 浙江大学 | Non-contact soil conductivity measurement system based on electromagnetic eddy current method |
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| CN102788996A (en) * | 2012-07-04 | 2012-11-21 | 浙江农林大学 | Resistance-type winter bamboo shoot detector and detection method |
| CN104635279A (en) * | 2013-11-13 | 2015-05-20 | 浙江农林大学 | Separation type ultrasonic and grounding resistance winter bamboo shoots detector and detecting principle thereof |
| CN206804887U (en) * | 2017-05-31 | 2017-12-26 | 浙江大学 | A kind of contactless winter bamboo shoot detection device |
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2017
- 2017-05-31 CN CN201710401160.0A patent/CN107085242A/en active Pending
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| CN102788996A (en) * | 2012-07-04 | 2012-11-21 | 浙江农林大学 | Resistance-type winter bamboo shoot detector and detection method |
| CN104635279A (en) * | 2013-11-13 | 2015-05-20 | 浙江农林大学 | Separation type ultrasonic and grounding resistance winter bamboo shoots detector and detecting principle thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814160A (en) * | 2019-03-07 | 2019-05-28 | 浙江农林大学 | Integrated vehicle is excavated in winter bamboo shoot detection |
| CN112327059A (en) * | 2020-08-12 | 2021-02-05 | 浙江大学 | Non-contact soil conductivity measurement system based on electromagnetic eddy current method |
| CN112327059B (en) * | 2020-08-12 | 2021-11-16 | 浙江大学 | Non-contact soil conductivity measurement system based on electromagnetic eddy current method |
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Application publication date: 20170822 |
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