CN106706177B - A kind of double-layer cross intersection construction particles collision sensor based on PVDF - Google Patents
A kind of double-layer cross intersection construction particles collision sensor based on PVDF Download PDFInfo
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- CN106706177B CN106706177B CN201611039729.5A CN201611039729A CN106706177B CN 106706177 B CN106706177 B CN 106706177B CN 201611039729 A CN201611039729 A CN 201611039729A CN 106706177 B CN106706177 B CN 106706177B
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- 239000002245 particle Substances 0.000 title claims abstract description 46
- 239000002033 PVDF binder Substances 0.000 title claims abstract description 28
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 239000010410 layer Substances 0.000 claims abstract description 79
- 238000000034 method Methods 0.000 claims abstract description 44
- 230000004927 fusion Effects 0.000 claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims abstract description 8
- 239000003822 epoxy resin Substances 0.000 claims description 28
- 229920000647 polyepoxide Polymers 0.000 claims description 28
- 239000012528 membrane Substances 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 17
- 229920002799 BoPET Polymers 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 4
- 241001269238 Data Species 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 235000013339 cereals Nutrition 0.000 description 15
- 238000010586 diagram Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013340 harvest operation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
- A01D41/12—Details of combines
- A01D41/127—Control or measuring arrangements specially adapted for combines
- A01D41/1271—Control or measuring arrangements specially adapted for combines for measuring crop flow
- A01D41/1272—Control or measuring arrangements specially adapted for combines for measuring crop flow for measuring grain flow
- A01D41/1273—Control or measuring arrangements specially adapted for combines for measuring crop flow for measuring grain flow for measuring grain loss
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of double-layer cross intersection construction particles collision sensor based on PVDF.Including stacking gradually the x stacked from top to bottom to sensor layer, insulating trip, y to sensor layer and support plate, x to sensor layer include multiple x to sensor unit, y includes multiple y to sensor unit to sensor layer, and x is vertical to sensor unit and y to the direction arranged in parallel of sensor unit；X is parallel-connected to x to electric signal process unit to electrical signal collection device through respective x to sensor unit, y is parallel-connected to y to electric signal process unit to electrical signal collection device through respective y to sensor unit, to be formed with interlayer sensor electrical parallel and the different concatenated structure of interlayer sensor mechanics.The present invention is that particles collision sensor proposes a kind of double-layer cross intersection construction, and particles collision location information can be obtained by multi-sensor fusion technology and improves detection accuracy, new mentality of designing is provided for particles collision sensor.
Description
Technical field
The present invention relates to a kind of particles collision sensors, intersect more particularly, to a kind of double-layer cross based on PVDF
Structure particles crash sensor can be applied in agricultural harvesting machinery as Grain Loss Sensor.
Background technique
It, need to be by cutting off crop stem, separation paddy when agricultural harvesting machinery such as combine harvester etc. carries out harvest operation
Grain with stalk, stalk disintegrating dish out, cereal collect and etc..Modern grain combine is generally in separator ridlle tail portion and clear grain
Grain Loss Sensor is installed to detect Grain Loss situation at sieve outlet, Grain Loss Sensor is according to particles collision sensor
The amplitude and frequency different instructions grain and other impurities of produced electric signal.Particles collision sensor design is single layer at present
Piezoelectric material structure can only improve detection accuracy by the number for increasing sensor and obtain location information, and Typical Representative is for example special
Sharp US20160025531A1.The present invention is that particles collision sensor proposes a kind of double-layer cross intersection construction, can be passed by more
Sensor integration technology come obtain particles collision location information and improve detection accuracy, new design is provided for particles collision sensor
Thinking.
Summary of the invention
The purpose of the present invention is propose a kind of based on PVDF to obtain particles collision location information and raising detection accuracy
Double-layer cross intersection construction particles collision sensor.
The present invention is adopted the technical scheme that in order to solve the above problem:
The present invention includes stacking gradually the x that stacks from top to bottom to sensor layer, insulating trip, y to sensor layer and support
Plate is connected by organic glue between above-mentioned four layers of adjacent two layers, x to sensor layer include it is multiple it is parallel side by side and mutually
The x of insulation to sensor unit, y to sensor layer include it is multiple it is parallel side by side and the y of mutually insulated is to sensor unit, x
To sensor unit direction arranged in parallel perpendicular to y to sensor unit direction arranged in parallel；X is passed through respectively to sensor unit
X be parallel-connected to x to electric signal process unit to electrical signal collection device, y is to sensor unit through respective y to electric signal
Collector is parallel-connected to y to electric signal process unit, to be formed with interlayer sensor electrical parallel and different interlayer sensor
The concatenated structure of mechanics.
Depending on sensor of the invention detection accuracy arranges density to sensor unit to sensor unit and y according to x, number
It is higher to measure the position precision that the more close then institute energy particles collision of more multiple rows of cloth can position.
The x is connected to computer to electric signal process unit and y to electric signal process unit, and x is to electrical signal collection
Device and y to electrical signal collection device acquire respectively electric signal from x to sensing unit and y to the electric signal of sensor unit, x is to telecommunications
Number processing unit and y receive what x was sent to electrical signal collection device and y to electrical signal collection device to electric signal process unit respectively
Acquired electric signal and being allowed to form square-wave signal and be output to computer, and computer receives x to electric signal process unit and y to electricity
The square-wave signal sent in signal processing apparatus carries out statistical disposition acquisition particle according to the source of square-wave signal and quantity and touches
Hit the data of number and position.
The x to sensor unit include x to PVDF piezoelectric membrane, two layers of x to epoxy resin layer and x to PET film,
X is bonded with x to epoxy resin layer to the upper and lower surface of PVDF piezoelectric membrane, and the x of upper surface is to epoxy resin layer and x to PET
Film bas bonding, two layers of x are respectively connected with x to plain weave conducting adhesive cloth to one side end face of epoxy resin layer, and x is to plain weave conducting adhesive cloth
It is connected with x to electrical signal collection device through x guiding line.
The y to sensor unit include y to PVDF piezoelectric membrane, two layers of y to epoxy resin layer and y to PET film,
Y is bonded with y to epoxy resin layer to the upper and lower surface of PVDF piezoelectric membrane, and the y of lower surface is to epoxy resin layer and y to PET
Top surface bonding, two layers of y are respectively connected with y to plain weave conducting adhesive cloth to one side end face of epoxy resin layer, and y is to plain weave conducting adhesive cloth
It is connected with y to electrical signal collection device through y guiding line.
The x is identical to electric signal process unit structure with y to electric signal process unit, includes sequentially connected electricity
Lotus amplifier, bandpass filter, envelope detector and voltage comparator, voltage comparator export square-wave signal.
The computer includes the square wave counter and use for handling the square-wave signal for having sensor unit information
In the Multi-sensor Fusion counter of Data Fusion, square wave counter is by the unit information of multiple sensors and number information
Multiple groups coordinate data is synthesized, multiple groups coordinate data passes to Multi-sensor Fusion counter, and Multi-sensor Fusion counter will
All coordinate datas by analysis, superposition, duplicate removal, count after obtain practical particles collision number and the every time position of collision generation
Set coordinate.
The invention has the benefit that
After the present invention is obtained respectively, handle to signal to, y by x, formed x to, y is horizontal to particles collision position, indulges seat
Mark, then convert the location information of particles collision sensor for cross, ordinate with multi-sensor fusion technology, can form
The location information of grain collision increases by one group of location information for collision particle, can reduce failing to judge, judging by accident for sensor, improve and pass
Sensor detection accuracy improves accuracy for agriculture grain loss detection.
Detailed description of the invention
Fig. 1 is surface structure schematic diagram of the present invention；
Fig. 2 is x of the present invention to sensor unit and x to the connected mode schematic diagram of electrical signal collection device；
Fig. 3 is y of the present invention to sensor unit and y to the connected mode schematic diagram of electrical signal collection device；
Fig. 4 is the electric signal process signal that x handles that multiple x are transmitted to electrical signal collection device 30 to electric signal process unit 50
Figure；
Fig. 5 is that computer 90 handles square-wave signal process schematic；
Fig. 6 is simple grain particles collision responsive state simplification figure of the present invention；
Fig. 7 is that two particles collide the present invention simultaneously, and position of collision coordinate has the identical condition responsive state of one
Schematic diagram.
In figure: x is to sensor unit 10, x to PVDF piezoelectric membrane 11, x to epoxy resin layer 12, x to plain weave conducting resinl
Cloth 13, x guiding line 14, x are to PET film 15；Y is to sensor unit 20, y to PVDF piezoelectric membrane 21, y to epoxy resin layer
22, y is to plain weave conducting adhesive cloth 23, y guiding line 24, y to PET film 25；X is to electrical signal collection device 30, y to electrical signal collection device
40, x is to electric signal process unit 50, y to electric signal process unit 60；Charge amplifier 51, bandpass filter 52, envelope detection
Device 53, voltage comparator 54；Insulating trip 70；Support plate 80；Computer 90, square wave counter 91, Multi-sensor Fusion counter
92。
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described in further details the present invention.
As shown in Figure 1, the present invention includes stacking gradually the x that stacks from top to bottom to sensor layer, insulating trip 70, y to biography
Sensor layer and support plate 80 are connected by organic glue between above-mentioned four layers of adjacent two layers, and x includes multiple flat to sensor layer
Row is side by side and the x of mutually insulated is to sensor unit 10, y to sensor layer include it is multiple it is parallel side by side and mutually insulated
Y is to sensor unit 20, and x is to the direction arranged in parallel of sensor unit 10 perpendicular to y to the direction arranged in parallel of sensor unit 20；
X is parallel-connected to x to electric signal process unit 50 to electrical signal collection device 30 through respective x to sensor unit 10, and x is to biography
All x of sensor layer are in parallel to sensor unit 10, and y is to sensor unit 20 through respective y to electrical signal collection device 40
Y is parallel-connected to electric signal process unit 60, y is in parallel to all y of sensor layer to sensor unit 20, to be formed
With interlayer sensor electrical parallel and the different concatenated structure of interlayer sensor mechanics.
In specific implementation as shown in Figure 1, multiple x to sensor unit 10 along x to arranged in parallel, each x is to sensor list
Mutually insulated between member 10, multiple y to sensor unit 20 along y to arranged in parallel, each y between sensor 20 mutually absolutely
Edge.
X is connected to computer 90 to electric signal process unit 50 and y to electric signal process unit 60, and x is to electrical signal collection
Device 30 and y acquired respectively to electrical signal collection device 40 electric signal from x to sensing unit 10 and telecommunications from y to sensor unit 20
Number, then it is separately sent to x to electric signal process unit 50 and y to electric signal process unit 60, x is to 50 He of electric signal process unit
Y receives x to electric signal process unit 60 respectively and is acquired to electrical signal collection device 30 and y to what electrical signal collection device 40 was sent
Electric signal and being allowed to form square-wave signal and be output to computer 90, and computer 90 receives x to electric signal process unit 50 and y to electricity
The square-wave signal sent in signal processing apparatus 60 carries out statistical disposition according to the source of square-wave signal and quantity and obtains particle
The data of collision frequency and position.
As shown in Fig. 2, x to sensor unit 10 include x to PVDF piezoelectric membrane 11, two layers of x to epoxy resin layer 12 and x
To PET film 15, x is bonded with x to epoxy resin layer 12 to the upper and lower surface of PVDF piezoelectric membrane 11, and the x of upper surface is to ring
Oxygen resin layer 12 is Nian Jie to 15 bottom surface of PET film with x, the x of upper surface to epoxy resin layer 12 by x to PET film 15 and x to
11 phase of PVDF piezoelectric membrane bonding, two layers of x are respectively connected with x to plain weave conducting adhesive cloth 13 to 12 1 side end face of epoxy resin layer, lead to
It crosses x and x is connected with x to PVDF piezoelectric membrane 11 to plain weave conducting adhesive cloth 13 to epoxy resin layer 12, x is to plain weave conducting adhesive cloth 13
It is connected with x to electrical signal collection device 30 through x guiding line 14.
As shown in figure 3, y to sensor unit 20 include y to PVDF piezoelectric membrane 21, two layers of y to epoxy resin layer 22 and y
To PET film 25, y is bonded with y to epoxy resin layer 22 to the upper and lower surface of PVDF piezoelectric membrane 21, and the y of lower surface is to ring
Oxygen resin layer 22 is Nian Jie to 25 top surface of PET film with y, the y of lower surface to epoxy resin layer 22 by y to PET film 25 and y to
21 phase of PVDF piezoelectric membrane bonding, two layers of y are respectively connected with y to plain weave conducting adhesive cloth 23 to 22 1 side end face of epoxy resin layer, lead to
It crosses y and y is connected with y to PVDF piezoelectric membrane 21 to plain weave conducting adhesive cloth 23 to epoxy resin layer 22, y is to plain weave conducting adhesive cloth 23
It is connected with y to electrical signal collection device 40 through y guiding line 24.
X is identical to electric signal process unit 50 and y to 60 structure of electric signal process unit, includes sequentially connected charge
Amplifier 51, bandpass filter 52, envelope detector 53 and voltage comparator 54, voltage comparator 54 export square-wave signal.
Specific implementation is as shown in figure 4, containing corresponding to collision in the square-wave signal that x is exported to electric signal process unit (50)
X to the serial number information of sensor unit, be respectively labeled as x1, x2, x3, x4, x5.Similarly, y is to electric signal process unit
(60) in the square-wave signal exported containing the corresponding y of collision to the serial number information of sensor unit, be respectively labeled as y1, y2,
y3、y4、y5。
As shown in figure 5, synthesis after coordinate data be respectively labeled as (x1, the n1) in the direction x, (x2, n2) ... (x5, n5) with
And (y1, m1), (y2, m2) ... (y5, the m5) in the direction y, n1, n2 ... n5 indicate that five x are respectively collected to sensor unit
Collision frequency, m1, m2 ... m5 indicate five y to the respective collected collision frequency of sensor unit,
Computer 90 includes for handling the square wave counter 91 for the square-wave signal for having sensor unit information, for inciting somebody to action
Sensor unit information and number information synthesize the data combiner of coordinate data and more sensings for handling coordinate data
Device merges counter 92, Multi-sensor Fusion counter 92 by all coordinate datas by analysis, superposition, duplicate removal, after counting
Obtain practical particles collision number and the every time position coordinates of collision generation.
By taking the simple grain particles collision present invention as an example, when the simple grain particles collision present invention, responsive state schematic diagram of the invention is such as
Shown in Fig. 6, when particle 100 hits the present invention, x to the drop point of sensor unit 10 be 101, due between sensor upper and lower level be power
Series relationship is learned, so the power of particle 100 is transferred to y to sensor unit 20, drop point 102.Particle 100 is in x to sensor
Collision forms electrical signal on unit 10, and electrical signal passes to x to electrical signal collection device 30, and x is into electrical signal collection device 30
Electrical signal carry square-wave signal x2 of the x to 10 information of sensor unit to being formed after electric signal process unit 50 by x101,
Similarly, the electrical signal that drop point 102 of the y on sensor unit 20 is formed, by y to electrical signal collection device 40 and y to telecommunications
Square-wave signal y2 is formed after number processing unit 60102, square-wave signal x2 of the x to electric signal process unit 50101It is transmitted to computer
(x2 is formed by square wave counter 91 in 90101, 1) carry sensors location information and number information coordinate, this coordinates table
Show has 1 collision on x2 sensor unit, similarly also will form (y2102, 1) coordinate, expression have on y2 sensor unit
1 collision, this, to coincideing, illustrates there is 1 collision in the present invention, and the coordinate collided with the collision on x2 sensor unit
For (x2, y2).
The situation that multiple particles are collided with the time and position of collision transverse and longitudinal coordinate is all different, can be according to simple grain particles collision
Method calculate.
It, can be according to x to electrical signal collection device if multiple particle different times collision, and position of collision transverse and longitudinal coordinate is identical
The number for the electrical signal that 30 and y is collected into electrical signal collection device 40, by x to electric signal process unit or y to electric signal
The square wave number formed after processing unit 60 counts out at square wave counter 91 and, calculated and collided several times.
Two particles collide the present invention simultaneously, and position of collision coordinate has the identical condition responsive state diagram of one such as
Shown in Fig. 7, particle 110 and particle 120 collide the present invention simultaneously, and particle 110 is in x to sensor unit 10 and y to sensor list
The mechanics drop point of member 20 is respectively 111 and 112, and particle 120 is in x to sensor unit 10 and y to the mechanics of sensor unit 20
Drop point is respectively 121 and 122, it is assumed that drop point 111 and drop point 121 in identical x on sensor unit, and because collision drop point
111 and 121 are formed simultaneously, so in x to an electric signal can only be collected at electrical signal collection device 30, and because of mechanics drop point
112 and 122 respectively in different y on sensor unit 20, respectively can be with so in two y on electrical signal collection device 40
It is collected into an electrical signal, after x is to electric signal process unit 50 and y to electric signal process unit 60, available side
Wave signal x21n1, y2112And y4122, it is after 90s that these square-wave signals are transmitted to computer, forms (x2 by square wave counter 911n1,
1), (y2112, 1) and (y4122, 1) and coordinate, expression has 1 time on x2 sensor unit collides, and has on y2 sensor unit 1 time
It collides, also there is 1 collision on y4 sensor unit, 2 collisions have occurred in this explanation in the present invention, and collision coordinate is respectively
(x2, y2) and (x2, y4).
The technical solution of double-layer cross intersection construction sensor of the invention, in each x to sensor unit 10 and y to biography
20 size reduction of sensor cell, when number becomes more, after arranging density increase, counting and positioning accuracy of the sensor to particles collision
It improves.
Claims (5)
1. a kind of double-layer cross intersection construction particles collision sensor based on PVDF, it is characterised in that:
Including stacking gradually the x stacked from top to bottom to sensor layer, insulating trip (70), y to sensor layer and support plate (80),
X is connected to sensor layer, insulating trip (70), y between sensor layer and the adjacent two layers of support plate (80) by organic glue,
X to sensor layer include it is multiple it is parallel side by side and the x of mutually insulated is to sensor unit (10), y includes more to sensor layer
It is a it is parallel side by side and the y of mutually insulated is to sensor unit (20), x to sensor unit (10) direction arranged in parallel perpendicular to
Y is to sensor unit (20) direction arranged in parallel；
X is parallel-connected to x to electric signal process unit to electrical signal collection device (30) through respective x to sensor unit (10)
(50), y is parallel-connected to y to electrical signal collection device (40) through respective y to sensor unit (20) and fills to Electric signal processing
(60) are set, to be formed with interlayer sensor electrical parallel and the different concatenated structure of interlayer sensor mechanics；
The x to sensor unit (10) include x to PVDF piezoelectric membrane (11), two layers of x to epoxy resin layer (12) and x to
PET film (15), x are bonded with x to epoxy resin layer (12), the x of upper surface to the upper and lower surface of PVDF piezoelectric membrane (11)
Nian Jie to PET film (15) bottom surface with x to epoxy resin layer (12), two layers of x is all connected with to (12) one side end face of epoxy resin layer
There is x to plain weave conducting adhesive cloth (13), x is to plain weave conducting adhesive cloth (13) through x guiding line (14) and x to electrical signal collection device (30) phase
Connection.
2. a kind of double-layer cross intersection construction particles collision sensor based on PVDF according to claim 1, feature
Be: the x is connected to computer (90) to electric signal process unit (50) and y to electric signal process unit (60), and x is to electricity
Signal collector (30) and y acquire x to electric signal from electrical signal collection device (40) to sensing unit (10) and y to sensor respectively
The electric signal of unit (20), x receive x to electric signal process unit (50) and y to electric signal process unit (60) to telecommunications respectively
Acquired electric signal that number collector (30) and y are sent to electrical signal collection device (40) is simultaneously allowed to form square-wave signal and is output to
Computer (90), computer (90) receive x and send to electric signal process unit (50) and y in electric signal process unit (60)
Square-wave signal, the data that statistical disposition obtains particles collision number and position are carried out according to the source of square-wave signal and quantity.
3. a kind of double-layer cross intersection construction particles collision sensor based on PVDF according to claim 1, feature
Be: the y to sensor unit (20) include y to PVDF piezoelectric membrane (21), two layers of y to epoxy resin layer (22) and y
To PET film (25), y is bonded with y to epoxy resin layer (22) to the upper and lower surface of PVDF piezoelectric membrane (21), lower surface
Y is Nian Jie to PET film (25) top surface with y to epoxy resin layer (22), and two layers of y is all connected with to (22) one side end face of epoxy resin layer
There is y to plain weave conducting adhesive cloth (23), y is to plain weave conducting adhesive cloth (23) through y guiding line (24) and y to electrical signal collection device (40) phase
Connection.
4. a kind of double-layer cross intersection construction particles collision sensor based on PVDF according to claim 1, feature
Be: the x is identical to electric signal process unit (60) structure with y to electric signal process unit (50), includes successively connecting
Charge amplifier (51), bandpass filter (52), envelope detector (53) and the voltage comparator (54) connect, voltage comparator
(54) square-wave signal is exported.
5. a kind of double-layer cross intersection construction particles collision sensor based on PVDF according to claim 2, feature
Be: the computer (90) includes the square wave counter (91) for handling the square-wave signal for having sensor unit information
With the Multi-sensor Fusion counter (92) for Data Fusion, square wave counter (91) can be by the unit of multiple sensors
Information and number information synthesize multiple groups coordinate data, and multiple groups coordinate data passes to Multi-sensor Fusion counter (92), more
Sensor merge counter (92) by all coordinate datas by analysis, superposition, duplicate removal, count after the practical particles collision of acquisition
Number and the position coordinates that collision occurs every time.
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| CN201611039729.5A CN106706177B (en) | 2016-11-11 | 2016-11-11 | A kind of double-layer cross intersection construction particles collision sensor based on PVDF |
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| CN106706177B true CN106706177B (en) | 2019-01-25 |
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| CN108340412A (en) * | 2018-03-19 | 2018-07-31 | 上海优尼斯工业服务有限公司 | A kind of industrial machinery arm safety guard |
| CN108896469B (en) * | 2018-04-20 | 2021-04-27 | 浙江大学 | Grain loss sensor's signal acquisition circuit |
| CN108593155B (en) * | 2018-05-22 | 2020-05-12 | 浙江大学 | Signal conditioning module of grain loss sensor |
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| CN104316243A (en) * | 2014-09-29 | 2015-01-28 | 西北农林科技大学 | Raindrop impact kinetic energy testing system based on multipoint PVDF piezoelectric thin-film sensor |
| CN104536613A (en) * | 2015-01-08 | 2015-04-22 | 厦门大学 | Method for manufacturing polyvinylidene fluoride piezoelectric nanofiber touch screen sensitive elements |
| EP2977735A2 (en) * | 2014-07-22 | 2016-01-27 | Deere & Company | Particulate matter impact sensor |
| CN105352635A (en) * | 2015-12-29 | 2016-02-24 | 中国矿业大学 | Spatial pre-embedded type three-dimensional stress monitoring system and method for underground coal and rock mass |
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- 2016-11-11 CN CN201611039729.5A patent/CN106706177B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2977735A2 (en) * | 2014-07-22 | 2016-01-27 | Deere & Company | Particulate matter impact sensor |
| CN104316243A (en) * | 2014-09-29 | 2015-01-28 | 西北农林科技大学 | Raindrop impact kinetic energy testing system based on multipoint PVDF piezoelectric thin-film sensor |
| CN104536613A (en) * | 2015-01-08 | 2015-04-22 | 厦门大学 | Method for manufacturing polyvinylidene fluoride piezoelectric nanofiber touch screen sensitive elements |
| CN105352635A (en) * | 2015-12-29 | 2016-02-24 | 中国矿业大学 | Spatial pre-embedded type three-dimensional stress monitoring system and method for underground coal and rock mass |
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