CN105241756A - Device and method for measuring crop stem lodging resistance strength - Google Patents
Device and method for measuring crop stem lodging resistance strength Download PDFInfo
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Abstract
The invention discloses a device for measuring crop stem lodging resistance strength and a method for measuring stem lodging resistance strength by using the device. The device includes a force application mechanism, a tensile mechanism, a stem inclination collection mechanism and a stem fixture which is fixed on a crop stem. The force application mechanism comprises a base and a mobile tensile component installed on the base through a hinge; the mobile tensile component includes a tension rod, pedals and a mobile fastening part arranged on the tension rod; and a tension sensor is arranged on the tensile mechanism. The device for measuring crop stem lodging resistance strength can realize storage of a large amount of measured data in measurement of crop stem lodging resistance strength, and can realize the output of the measurement data; and repeated and convenient measurement can be carried out in the measurement of crop stem lodging resistance strength, and stable measurement data can be obtained. The method for measuring crop stem lodging resistance strength can obtain more accurate and reliable tensile strength measurement data in the measurement of crop lodging resistance.
Description
Technical field
The present invention relates to strength meter, be specifically related to a kind of crop stem measuring lodging-resistant strength device and carry out crop stem measuring lodging-resistant strength method with this kind of device.
Background technology
Plant lodging is that the crop plant stem stalk that caused by extraneous factor is from natural erectility to the phenomenon of permanent dislocation, be under the effect of natural conditions such as wind and rain when reason is plant growth and form a kind of bending force vertical with plant, cause plant to bend, even fracture.When this bending force within limits time, under natural growth conditions, can also recover, but when exceeding certain limit, just can cause expendable destruction, formed lodging.Lodging phenomenon be common in cereal crop as, corn, paddy rice, wheat, soybean etc.Research shows that the crop such as corn, wheat, paddy rice, tobacco causes the production loss of crop very huge because lodging, and crop stem lodging intensity is one affects the very important index of crop yield.The New Crop Varieties cultivated, determine whether this kind has premium properties, wherein the mensuration of lodging resistance traits very important.
Chinese invention CN103822829A then discloses one can carry out same intensity tension measuring device to crop from different perspectives, and obviously can reduce the different impact on measurement result of direction of pull, make tensile strength measurement data when crop is resistant to lodging measures more accurate, reliable.But this device can only carry out stretch bending operation by artificial hand when carrying out measuring lodging-resistant strength of crop, very requires great effort time-consuming, operation uses inconvenience, nor is beneficial to and takes multiple measurements; In addition, this device cannot store a large amount of data, and acquired measurement data cannot realize outside transmission.
Summary of the invention
It is more accurate that the technical problem to be solved in the present invention is to provide a kind of testing result, more convenient to operate and time saving and energy saving crop stem measuring lodging-resistant strength device and assay method.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Designing a kind of crop stem measuring lodging-resistant strength device, comprising tensile machine, force application mechanism, stem stalk inclination angle collecting mechanism and for being fixed on the stem stalk fixture on crop stem;
The mobile tensile part that described force application mechanism is comprised base, is arranged at the T-shaped handle on described base and is installed on by hinge on described base, described mobile tensile part comprises stayed mast, pedal and is arranged at the mobile fasteners on described stayed mast; Described pedal is movably installed on described stayed mast;
Described stem stalk inclination angle collecting mechanism comprises wireless transmission sensor, second source module and at least one gradient sensor, the angle [alpha] that described gradient sensor tilts relative to vertical direction for measuring crop stem.
Preferably, described tensile machine comprises signals collecting and amplification module, data processing module, the first power module, button and display module, wireless receiving sensor, data memory module, data upload module;
Described signals collecting and amplification module comprise pulling force sensor, A/D converter, operational amplifier and at least one pulling force angular transducer; The two ends of described pulling force sensor are respectively equipped with hook, and wherein the hook of one end is used for being connected with described stem stalk fixture, and the hook of the other end is used for being connected with described mobile fasteners; Described pulling force angular transducer is for measuring pulling force relative to the angle beta in horizontal direction, and described pulling force sensor is corresponding with described signals collecting and amplification module to be connected;
Preferably, described data processing module comprises central processing unit PIC24FV32KA304, and it is that high performance CPUC adopts modified Harvard framework, and highest running speed can reach 16MIPS.Described data memory module is external 24FC1025, it is a serial electric erasable EEPROM, and maximum memory space is 1024Kb, operating voltage range wide (1.7V ~ 5.5V), and there is page write function, be particularly suitable for low-power consumption, the data of portable equipment store.Described data upload module is CH340G, and it is the connect chip of a usb bus, realizes USB and turns serial port function, common serial equipment directly can be upgraded to usb bus, thus makes the data-transformation facility that is convenient for measuring between device and PC.
Preferably, described stem stalk inclination angle collecting mechanism is provided with the clip for being connected with described stem stalk fixture.
Preferably, described stem stalk fixture is provided with the junction button for being connected with the hook of described pulling force sensor.
Preferably, be provided with the mounting hole be equally spaced of some on the top of described stayed mast, described mobile fasteners is installed together by corresponding mounting hole and described stayed mast; The top of described stayed mast is provided with the bending part be provided with between the part of mounting hole and the bottom of stayed mast laterally.
A measuring method for crop stalk penetrometer resistance, comprises the steps:
(1) use above-mentioned crop stem measuring lodging-resistant strength device, described stem stalk fixture is fixed on crop stem to be measured, then described stem stalk inclination angle collecting mechanism is fixed on described stem stalk fixture;
Be connected by the junction button of the hook of described tensile machine one end with described stem stalk fixture, the hook of the other end is connected with described mobile fasteners;
(2) stretch bending crop stem to be measured is carried out by the mode of trampling described pedal downwards, stem stalk inclination angle collecting mechanism and tensile machine record respectively stem stalk from the vertical crop stem corresponding to the maximum pull value F snap-off process, maximum pull value relative to vertical direction tilt angle alpha and now pulling force relative to horizontal direction upper angle β, data processing is carried out according to formula I, draw crop stem penetrometer resistance data, the standard as evaluation stem stalk lodging tolerance:
F '=FCOS (| β |-| α |)---formula I
F ' is the penetrometer resistance measuring the crop stem obtained.
Preferably, before measurements, first with following method, described pulling force sensor is demarcated:
Pulling force sensor is applied to the pulling force of a series of value of thrust (Kg), record the A/D value of the correspondence that pulling force sensor A/D converter collects simultaneously, magnitude of voltage is now tried to achieve according to formula 5v/4096=X/ (A/D), then according to conversion coefficient 20Kg/ (the 0.01V*495)=4.0404Kg/VKg/V of magnitude of voltage and pulling force in the hope of value of thrust (Kg), if be that ordinate is as output with value of thrust, A/D value be horizontal ordinate as input, obtain the relation between A/D value and corresponding value of thrust:
F=4.0404* (5V/4.96) * A/D---formula II
Wherein, F represents that the value of thrust (Kg) that actual conversion exports, A/D represent the A/D transformation result of the signal that the corresponding moment collects.
Preferably, before measurements, first with following method, angular transducer is demarcated:
When angular transducer being placed in different angles, record A/D value now respectively, utilize formula 5v/4096=X/ (A/D) just can obtain output voltage Vout now, then formula α=arcsin (0.5*Vout-1.25) is utilized, obtain radian now, utilize formula θ=(180/3.141592) * α can obtain angle value now according to radian value; Using A/D as input, with angle as output, corresponding input/output relation is as follows:
θ=(180/3.141592) * arcsin [(2.5*A/D)/4096-1.25]---formula III
The wherein angle value that exports after conversion of θ representative, A/D value be analog voltage that angular transducer exports under this angle collected after the value that draws through conversion.
Preferably, in described step (2), described pulling force sensor, gradient sensor, pulling force angular transducer gather pulling force information F, the angle information α in corresponding moment respectively, angle information β is processed by following method by data processing module via after signal transacting:
Angle calcu-lation: by the angle β of direction of pull and horizontal direction, and the angle [alpha] that crop stem is bending relative to vertical direction, calculate pulling force and perpendicular to by the angle theta between stretch bending corn crop stem stalk direction;
θ=|β|-|α|
Calculate initial tensile force value: the A/D value corresponding by pulling force, calculate the original value of thrust obtained, computing formula can be obtained by formula in calibration process II, and value of thrust F can represent:
F=4.0404*(5V/4.96)*A/D
Angularity correction value of thrust: establish the value of thrust after angularity correction to be set to
, then the value of thrust that finally can be carried out angle correct is:
F′=F*COSθ
Value of thrust F ' is the value of thrust after the calibration of real-time direction, namely measures the penetrometer resistance F ' of the crop stem obtained.
The present invention has actively useful effect:
1. crop stem measuring lodging-resistant strength device of the present invention can realize when measuring crop stem penetrometer resistance, store a large amount of measurement data, and the output of measurement data can be realized, and can repeatedly measure easily when crop stem measuring lodging-resistant strength, stable measurement data can be obtained.This apparatus structure is reasonable, convenient operation, can directly show penetrometer resistance value after measurement, and measurement result more accurately, intuitively.
2. this device has and is convenient to field is carried, compact, accuracy rate are high, easy for installation, be convenient to data storage and analysis and can carries out crop stem experiment resistant to lodging in field, achieve fast and accurately to the measurement of crop stem penetrometer resistance, and consistent pulling force data can be obtained, establish the universalization standard of crop stem measurement resistant to lodging.
3. the measuring method of crop stalk penetrometer resistance of the present invention, obviously can eliminate the different impact on measurement result of direction of pull, measuring process is time saving and energy saving, and the measurement data obtained more accurately, reliably.
Accompanying drawing explanation
Fig. 1 is the side structural representation after crop stem measuring lodging-resistant strength device of the present invention is installed;
Fig. 2 is the opposite side structural representation of crop stem measuring lodging-resistant strength device in Fig. 1;
Fig. 3 is the structural representation in Fig. 1 in the use procedure of crop stem measuring lodging-resistant strength device;
Fig. 4 is the enlarged drawing in A portion in Fig. 3;
Fig. 5 is the structural representation of stayed mast when turning to extreme lower position;
Wherein, 1 be force application mechanism, 2 be tensile machine, 3 for stem stalk inclination angle collecting mechanism, 4 be stem stalk fixture, 5 be base, 6 is T-shaped handle, 7 is stayed mast, and 8 is pedal, and 9 is mobile fasteners, and 10 is junction button, 11 is mounting hole, and 12 is bending part, and 13,14 is hook, and 15 is positive stop strip.
The connecting circuit figure of pulling force signals collecting and amplification in Fig. 6 apparatus of the present invention;
Fig. 7 is angular transducer connecting circuit figure in apparatus of the present invention;
Fig. 8 is in apparatus of the present invention first or the circuit diagram of battery live part of second source part.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
Embodiment 1: design a kind of crop stem measuring lodging-resistant strength device, as shown in Fig. 1 to Fig. 5, comprises force application mechanism 1, tensile machine 2, stem stalk inclination angle collecting mechanism 3 and for being fixed on the stem stalk fixture 4 on crop stem;
The mobile tensile part that force application mechanism 1 is comprised base 5, is arranged at the T-shaped handle 6 on base 5 and is installed on by hinge on base 5, the mobile fasteners 9 that mobile tensile part comprises stayed mast 7, pedal 8 and is arranged on stayed mast 7; Pedal 8 is movably installed on stayed mast 7; Be provided with the mounting hole 11 that some is equally spaced on the top of stayed mast 7, mobile fasteners 9 is installed together with stayed mast 7 by corresponding mounting hole 11, and mobile fasteners 9 adjusts its relative position by being arranged in different mounting holes.
Stayed mast 7 top is provided with the part of mounting hole relative to its underpart generation bending laterally, the kink 12 produced between the part of mounting hole and stayed mast bottom is laterally provided with on stayed mast top, when measuring, base 5 is positioned over the side of crop stem, now the bottom of stayed mast 7 is also positioned at the side of crop stem, the top of stayed mast 7 is then in same plane with stem stalk, tensile machine 2, avoids there is restraining mass when lower stem pulling stalk below stem stalk.Base 5 is also provided with positive stop strip 15, stayed mast 7 Forced rotation is contacted with this positive stop strip 15 to during minimum point, avoid stayed mast 7 to continue to rotate and damage the link of itself and base.
Tensile machine 2 is provided with pulling force sensor, and the two ends of pulling force sensor are respectively equipped with hook 13,14, and wherein the hook 13 of one end is for being connected with stem stalk fixture, and the hook 14 of the other end is for being connected with mobile fasteners 9; Stem stalk inclination angle collecting mechanism 3 is provided with the clip for being connected with stem stalk fixture 4.Stem stalk fixture 4 is provided with the junction button 10 for being connected with the hook 13 of pulling force sensor.By such structure, stem stalk fixture 4 is made to be fixed on crop stem to be measured, stem stalk inclination angle collecting mechanism 3 is arranged on stem stalk fixture 4, the hook at the pulling force sensor two ends in tensile machine 2 is connected with mobile fasteners 9 with stem stalk fixture 4 respectively, stem stalk, tensile machine 2 and stayed mast 7 are joined together, when being exerted a force to stayed mast 7 by pedal 8, also under tension is downward-sloping thereupon for stem stalk.
Tensile machine 2 also comprises signals collecting and amplification module, data processing module, the first power module, button and display module, wireless receiving sensor, data memory module, data upload module; Signals collecting and amplification module comprise pulling force sensor, A/D converter, operational amplifier A D620 and at least one pulling force angular transducer, pulling force angular transducer is for measuring pulling force relative to the angle beta in horizontal direction, and pulling force sensor is corresponding with signals collecting and amplification module to be connected.
The collection to signal of signals collecting and amplification module can be divided into the collection of pulling force signal and the collection of angle signal, the collection of pulling force signal adopts the bridge circuit of pulling force sensor, gather the pulling force suffered by crop, the collection of angle signal utilizes inclinator SCA60C to carry out the collection of information.
In the collection of pulling force signal, adopt traditional pulling force sensor to gather signal, by pulling force sensor, pulling force signal is converted to electric signal, the amplification of signal is carried out again by AD620, signal is converted to the voltage signal that can directly process, the pulling force signals collecting of design and the connecting circuit of amplification are as shown in Figure 6.In figure, namely J101 is the interface of pulling force sensor, and wherein 1 pin connects power supply, and 2,3 pins are the difference mode signal source exported, and export the amplification that AD620 carries out signal to.
Changed by the angle in the process of forgetting about it to record crop stem, design have employed the collection source of single-shaft inclination angle sensor SCA60C as angle signal, and the angular transducer connecting circuit figure of design as shown in Figure 7.As seen from the figure, data clock pin 1, the C1 pin 2 of obliquity sensor SCA60C are connected with self-test input pin 5 respectively with Schema control input pin 3, grounding pin 4 ground connection of obliquity sensor SCA60C, the power pins 8 of obliquity sensor SCA60C connects power supply, simultaneously power pins 8 be connected with two electric capacity C106 and C107 in parallel between ground, output pin 7 connects next stage AD by resistance R103, and output pin 7 is connected to the ground by resistance R103 and electric capacity C108 successively.
Data processing module comprises central processing unit PIC24FV32KA304, and it is that high performance CPUC adopts modified Harvard framework, and highest running speed can reach 16MIPS.
Stem stalk inclination angle collecting mechanism comprises wireless transmission sensor, second source module and at least one gradient sensor, the angle [alpha] that gradient sensor tilts relative to vertical direction for measuring crop stem.
First power module is identical with second source modular circuit connected mode, includes battery live part, and battery live part comprises USB socket, lithium cell charging integrated circuit CN3062, lithium battery connection terminal positive pole J2 and negative pole J3 and power switch, battery live part circuit diagram as shown in Figure 8, wherein J901 is USB socket, the FG pin 0 of J901 and the grounding pin 5 of J901 ground connection respectively, the VBUS pin 1 of J901 is connected with the voltage positive input pin 4 of lithium cell charging integrated circuit CN3062, voltage positive input pin 4 is connected with the positive pole of light emitting diode D902 with light emitting diode D901 respectively by resistance R901, the charged state that the charging done state that light emitting diode D901 and light emitting diode D902 negative pole export with the open-drain of lithium cell charging integrated circuit CN3062 respectively indicates pin 6 and open-drain to export indicates pin 7 to be connected, voltage positive input pin 4 is also connected to ground by electric capacity C900 simultaneously, grounding pin 3 ground connection of lithium cell charging integrated circuit CN3062, the battery connection pin 5 of lithium cell charging integrated circuit CN3062 detects input pin 8 with cell voltage Kelvin and is connected, after be connected with lithium battery connection terminal positive pole J2 with power switch respectively again, the battery temperature of lithium cell charging integrated circuit CN3062 detects input pin 1 and is connected with lithium battery connection terminal negative pole J3, and the constant-current charge electric current setting of lithium cell charging integrated circuit CN3062 simultaneously detects input pin 1 by resistance R905 with battery temperature with charging current monitoring pin 2 and is connected, cell voltage Kelvin detection input pin 8 is detected between input pin 1 with battery temperature and is connected by electric capacity C901.
Data memory module is external 24FC1025, and it is a serial electric erasable EEPROM, and maximum memory space is 1024Kb, operating voltage range wide (1.7V ~ 5.5V), and has page and write function, is particularly suitable for low-power consumption, the data of portable equipment store.Data upload module is CH340G, and it is the connect chip of a usb bus, realizes USB and turns serial port function, common serial equipment directly can be upgraded to usb bus, thus makes the data-transformation facility that is convenient for measuring between device and PC.
Utilize above-mentioned measurement mechanism to carry out the assay method of crop stalk penetrometer resistance, comprise the steps:
(1) pulling force sensor is demarcated:
Pulling force sensor is applied to the pulling force of a series of value of thrust (Kg), record the A/D value of the correspondence that pulling force sensor A/D converter collects simultaneously, magnitude of voltage is now tried to achieve according to formula 5v/4096=X/ (A/D), then according to conversion coefficient 20Kg/ (the 0.01V*495)=4.0404Kg/V of magnitude of voltage and pulling force in the hope of value of thrust (Kg), if be that ordinate is as output with value of thrust, A/D value be horizontal ordinate as input, then can wait until the relation between A/D value and corresponding value of thrust:
F=4.0404* (5V/4.96) * A/D---formula II
Wherein, F represents that the value of thrust (Kg) that actual conversion exports, A/D represent the A/D transformation result of the signal that the corresponding moment collects.
(2) angular transducer is demarcated:
Angular transducer is SCA60C angular transducer, it is single-shaft inclination angle sensor, measurement range is at-90 ° ~+90 °, the 5V of one pole powers, ratio-voltage exports, the analog voltage exported is at 0.5 ~ 4.5V, corresponding angle is-90 ° ~+90 °, when angular transducer being placed in different angles, record A/D value now respectively, we utilize formula 5v/4096=X/ (A/D) just can obtain output voltage Vout now, then formula α=arcsin (0.5*Vout-1.25) is utilized, obtain radian now, utilize formula θ=(180/3.141592) * α can obtain angle value now according to radian value.Using A/D as input, using angle as output, corresponding input/output relation is as follows:
θ=(180/3.141592) * arcsin [(2.5*A/D)/4096-1.25]---formula III
The wherein angle value that exports after conversion of θ representative, A/D value be analog voltage that angular transducer exports under this angle collected after the value that draws through conversion.
(3) use crop stem measuring lodging-resistant strength device, stem stalk fixture is fixed on crop stem to be measured, then stem stalk inclination angle collecting mechanism is fixed on stem stalk fixture; Be connected by the junction button of the hook of tensile machine one end with stem stalk fixture, the hook of the other end is used for being connected with mobile fasteners; Stretch bending crop stem is carried out by the mode of trampling pedal downwards, stem stalk inclination angle collecting mechanism and tensile machine record respectively stem stalk from vertical to snap-off process crop stem corresponding to maximum pull value F, maximum pull value F relative to vertical direction tilt angle alpha and now pulling force relative to horizontal direction upper angle β, data processing is carried out according to formula I, draw crop stem penetrometer resistance, as the standard of evaluation stem stalk lodging tolerance;
F '=FCOS (| β |-| α |)---formula I
F ' is the penetrometer resistance measuring the crop stem obtained.
(4) pulling force sensor, gradient sensor, pulling force angular transducer gather β after pulling force information F, the angle information α in corresponding moment, angle information respectively, process by following method:
The first step: angle calcu-lation: by the angle β of direction of pull and horizontal direction, and the angle [alpha] that crop stem is bending relative to vertical direction, calculate pulling force and perpendicular to by the angle theta between stretch bending corn crop stem stalk direction;
θ=|β|-|α|
Second step: calculate initial tensile force value: the A/D value corresponding by pulling force, calculate the original value of thrust obtained, computing formula can be obtained by calibration process Chinese style formula II, and original value of thrust F can represent:
F=4.0404*(5V/4.96)*A/D
3rd step: angularity correction value of thrust: establish the value of thrust after angularity correction to be set to F ', then the value of thrust that finally can be carried out angle correct is:
F′=F*COSθ
Value of thrust F ' is the value of thrust after the calibration of direction, namely measures the penetrometer resistance F ' of the crop stem obtained.
To measure the penetrometer resistance of corn stem, adopt crop stem measuring lodging-resistant strength device of the present invention, stem stalk fixture is installed on corn stem, force application mechanism, tensile machine, after stem stalk inclination angle collecting mechanism correspondence installs, trample pedal downwards, stayed mast stressed drive corn stem is downward-sloping, in this course, pulling force sensor records corn stem from vertical to the maximum pull snap-off process, angle-data when pulling force angular transducer acquisition pulling force is maximum between direction of pull and horizontal line, gradient sensor records the angle-data that now corn crop stem stalk tilts relative to vertical direction, direction of pull is obtained and perpendicular to the angle-data between corn crop stem stalk in data handling procedure, thus pulling force is corrected on the direction vertical with crop stem, eventually through calculating corn stem penetrometer resistance F ', and measurement result is exported on the display screen of tensile machine.Crop stem measuring lodging-resistant strength device of the present invention obviously can eliminate the different impact on measurement result of direction of pull, and the effect of field natural wind to corn stem can be simulated, make the measurement resistant to lodging of corn crop stem stalk time saving and energy saving, and the corn stem Tensile strength data of this measurement device accurately, reliable and be convenient to scientific research analysis.Achieve fast and accurately to the measurement of corn crop stem stalk penetrometer resistance, and consistent pulling force data can be obtained, establish the universalization standard of corn crop stem stalk measurement resistant to lodging.
In conjunction with the accompanying drawings and embodiments embodiments of the present invention are elaborated above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also carry out changing or changing under the prerequisite not departing from present inventive concept.
Claims (10)
1. a crop stem measuring lodging-resistant strength device, comprises tensile machine, it is characterized in that, comprises force application mechanism, stem stalk inclination angle collecting mechanism and for being fixed on the stem stalk fixture on crop stem;
The mobile tensile part that described force application mechanism is comprised base, is arranged at the T-shaped handle on described base and is installed on by hinge on described base, described mobile tensile part comprises stayed mast, pedal and is arranged at the mobile fasteners on described stayed mast; Described pedal is movably installed on described stayed mast;
Described stem stalk inclination angle collecting mechanism comprises wireless transmission sensor, second source module and at least one gradient sensor, the angle [alpha] that described gradient sensor tilts relative to vertical direction for measuring crop stem.
2. crop stem measuring lodging-resistant strength device according to claim 1, is characterized in that: described tensile machine comprises signals collecting and amplification module, data processing module, the first power module, button and display module, wireless receiving sensor, data memory module, data upload module;
Described signals collecting and amplification module comprise pulling force sensor, A/D converter, operational amplifier and at least one pulling force angular transducer, the two ends of described pulling force sensor are respectively equipped with hook, wherein the hook of one end is used for being connected with described stem stalk fixture, and the hook of the other end is used for being connected with described mobile fasteners; Described pulling force angular transducer is for measuring pulling force relative to the angle beta in horizontal direction; Described pulling force sensor is corresponding with described signals collecting and amplification module to be connected.
3. crop stem measuring lodging-resistant strength device according to claim 2, it is characterized in that: described data processing module comprises central processing unit PIC24FV32KA304, described data memory module is external 24FC1025, and described data upload module is CH340G.
4. crop stem measuring lodging-resistant strength device according to claim 1, is characterized in that: on the collecting mechanism of described stem stalk inclination angle, be provided with the clip for being connected with described stem stalk fixture.
5. crop stem measuring lodging-resistant strength device according to claim 1, is characterized in that: on described stem stalk fixture, be provided with the junction button for being connected with the hook of described pulling force sensor.
6. crop stem measuring lodging-resistant strength device according to claim 1, it is characterized in that: the equidistant mounting hole being provided with some on the top of described stayed mast, described mobile fasteners is installed together by described mounting hole and described stayed mast; Described stayed mast top is provided with the kink be provided with between the part of mounting hole and stayed mast bottom laterally.
7. an assay method for crop stalk penetrometer resistance, comprises the steps:
(1) use the crop stem measuring lodging-resistant strength device described in claim 1, described stem stalk fixture is fixed on crop stem to be measured, then described stem stalk inclination angle collecting mechanism is fixed on described stem stalk fixture;
Be connected by the junction button of the hook of described tensile machine one end with described stem stalk fixture, the hook of the other end is connected with described mobile fasteners;
(2) stretch bending crop stem to be measured is carried out by the mode of trampling described pedal downwards, stem stalk inclination angle collecting mechanism and tensile machine record respectively stem stalk from the vertical crop stem corresponding to the maximum pull value F snap-off process, maximum pull value F relative to vertical direction tilt angle alpha and now pulling force relative to the angle beta of horizontal direction, data processing is carried out according to formula I, draw crop stem penetrometer resistance data, as the standard of evaluation stem stalk lodging tolerance;
F '=FCOS (| β |-| α |)---formula I
F ' is the penetrometer resistance measuring the crop stem obtained.
8. crop stalk penetrometer resistance assay method according to claim 7, is characterized in that, before measurements, first demarcates described pulling force sensor with following method:
Pulling force sensor is applied to the pulling force of a series of value of thrust (Kg), record the A/D value of the correspondence that pulling force sensor A/D converter collects simultaneously, magnitude of voltage is now tried to achieve according to formula 5v/4096=X/ (A/D), then according to conversion coefficient 20Kg/ (the 0.01V*495)=4.0404Kg/V of magnitude of voltage and pulling force in the hope of value of thrust (Kg), if be that ordinate is as output with value of thrust, A/D value be horizontal ordinate as input, obtain the relation between A/D value and corresponding value of thrust:
F=4.0404* (5v/4.96) * A/D---formula II
Wherein, F represents that the value of thrust (Kg) that actual conversion exports, A/D represent the A/D transformation result of the signal that the corresponding moment collects.
9. crop stalk measuring lodging-resistant strength method according to claim 7, is characterized in that, before measurements, first demarcates angular transducer with following method:
When angular transducer being placed in different angles, record A/D value now respectively, utilize formula 5v/4096=X/ (A/D) just can obtain output voltage Vout now, then utilize formula α=arcsin (0.5*Vout-1.25) to obtain radian now, utilize formula θ=(180/3.141592) * α can obtain angle value now according to radian value; Using A/D as input, using angle as output, corresponding input/output relation is as follows:
θ=(180/3.141592) * arcsin [(2.5*A/D)/4096-1.25]---formula III
The wherein angle value that exports after conversion of θ representative, A/D value be analog voltage that angular transducer exports under this angle collected after the value that draws through conversion.
10. crop stalk measuring lodging-resistant strength method according to claim 7, it is characterized in that: in described step (2), described pulling force sensor, gradient sensor, pulling force angular transducer process by following method after gathering pulling force information F, the angle information α in corresponding moment, angle information β respectively:
Angle calcu-lation: by the angle β of direction of pull and horizontal direction, and the angle [alpha] that crop stem is bending relative to vertical direction, calculate pulling force and perpendicular to by the angle theta between stretch bending corn crop stem stalk direction;
θ=|β|-|α|
Calculate initial tensile force value: the A/D value corresponding by pulling force, calculate the original value of thrust obtained, computing formula can be obtained by formula in calibration process II, and original value of thrust F can represent:
F=4.0404*(5V/4.96)*A/D
Angularity correction value of thrust: establish the value of thrust after angularity correction to be set to F ', then the value of thrust that finally can be carried out angle correct is:
F′=F*COSθ
Value of thrust F ' is the value of thrust after the calibration of real-time direction, namely measures the penetrometer resistance F ' of the crop stem obtained.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107991228A (en) * | 2017-11-09 | 2018-05-04 | 贾鑫 | A kind of survey tool of selection and breeding corn variety resistant to lodging |
| CN108169035A (en) * | 2018-03-01 | 2018-06-15 | 青岛农业大学 | A kind of crop measuring device resistant to lodging |
| CN108303316A (en) * | 2018-01-19 | 2018-07-20 | 广东省农业科学院水稻研究所 | A kind of crop stalk penetrometer resistance automatic measuring instrument |
| CN109030178A (en) * | 2018-08-14 | 2018-12-18 | 江苏徐淮地区淮阴农业科学研究所 | Gramineous crop stalk fracture resistence force rapid determination device |
| CN110024580A (en) * | 2019-04-28 | 2019-07-19 | 黑龙江省农业科学院耕作栽培研究所 | A method of measurement plant different type root system power resistant to lodging |
| CN113671133A (en) * | 2021-09-23 | 2021-11-19 | 中国农业科学院油料作物研究所 | Device for monitoring and correcting crop inclination angle in real time and crop lodging resistant method thereof |
| CN114166654A (en) * | 2021-11-09 | 2022-03-11 | 中国科学院东北地理与农业生态研究所 | Crop lodging resistance performance measuring equipment, system and method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991228A (en) * | 2017-11-09 | 2018-05-04 | 贾鑫 | A kind of survey tool of selection and breeding corn variety resistant to lodging |
| CN108303316A (en) * | 2018-01-19 | 2018-07-20 | 广东省农业科学院水稻研究所 | A kind of crop stalk penetrometer resistance automatic measuring instrument |
| CN108303316B (en) * | 2018-01-19 | 2023-08-08 | 广东省农业科学院水稻研究所 | Automatic measuring instrument for lodging-resistant strength of crop stems |
| CN108169035A (en) * | 2018-03-01 | 2018-06-15 | 青岛农业大学 | A kind of crop measuring device resistant to lodging |
| CN109030178A (en) * | 2018-08-14 | 2018-12-18 | 江苏徐淮地区淮阴农业科学研究所 | Gramineous crop stalk fracture resistence force rapid determination device |
| CN110024580A (en) * | 2019-04-28 | 2019-07-19 | 黑龙江省农业科学院耕作栽培研究所 | A method of measurement plant different type root system power resistant to lodging |
| CN110024580B (en) * | 2019-04-28 | 2021-05-11 | 黑龙江省农业科学院耕作栽培研究所 | Method for measuring lodging resistance of different types of root systems of corn plants |
| CN113671133A (en) * | 2021-09-23 | 2021-11-19 | 中国农业科学院油料作物研究所 | Device for monitoring and correcting crop inclination angle in real time and crop lodging resistant method thereof |
| CN113671133B (en) * | 2021-09-23 | 2023-08-15 | 中国农业科学院油料作物研究所 | Device for monitoring and correcting inclination angle of crops in real time and method for resisting lodging of crops by device |
| CN114166654A (en) * | 2021-11-09 | 2022-03-11 | 中国科学院东北地理与农业生态研究所 | Crop lodging resistance performance measuring equipment, system and method |
| CN114166654B (en) * | 2021-11-09 | 2023-08-22 | 中国科学院东北地理与农业生态研究所 | Crop lodging resistance measuring equipment, system and method |
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