CN106525605B - It is a kind of for measuring the device and method of crop lodging resistance - Google Patents
It is a kind of for measuring the device and method of crop lodging resistance Download PDFInfo
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- CN106525605B CN106525605B CN201611130194.2A CN201611130194A CN106525605B CN 106525605 B CN106525605 B CN 106525605B CN 201611130194 A CN201611130194 A CN 201611130194A CN 106525605 B CN106525605 B CN 106525605B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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Abstract
The present invention provides a kind of for measuring the device and method of crop lodging resistance, including support frame, the upper end of support frame as described above is equipped with the screw rod gone up and down along the vertical direction being driven by motor, and the top setting of the screw rod is connected with torque sensor, drives the rotating mechanical arm to rotate in the horizontal direction by servo motor；Using the device, by adjusting screw rod lifting in the vertical direction, the rotation of control rotating mechanical arm and measure the lodging resistance of crop.The apparatus structure is simple, and measurement method is accurate, will not cause to damage to crop, realizes and detects to the Full-automatic nondestructive of crop.
Description
Technical field
The present invention relates to crops technical field of performance test, resistant to lodging for measuring crop more particularly, to one kind
The device and method of property.
Background technique
Crop lodging resistance is the important indicator that breeding industry carries out excellent variety screening, under normal circumstances, anti-fall
Fu Xingyue is good, and crop yield is higher, illustrates that kind is better, therefore the measurement of crop lodging resistance is for crop breeding and germ plasm resource
Screening be of great significance.In recent years, there is some crop performance test devices and method, can performance to crop into
Row test.
It is such as anti-application No. is a kind of evaluation corn stem is disclosed in 201610133636.2 Chinese invention patent file
The method of lodging ability is measured the stem skin puncture intensity of the following internode in stalk fringe position, saves the above internode to fringe position and incline
Rake angle is measured, and wears hardness in conjunction with stem skin and two aspect of flexibility carries out objectively synthesis to stalk lodging tolerance and comments
Valence.
Application No. is a kind of corn lodging resistance identification is disclosed in 201610104074.9 Chinese invention patent file
Microcosmic test method.2nd row of the invention every combination after maturation continuously takes 3 plants of stalks since the 3rd plant, measures each internode
Length and Internode diameter wrap fresh-keeping sample with plastic film, in case surveying stalk hardness；Time and the stalk of sampling has been determined
Position, test stem punctures and the machine of the straw stiffness analyzer of breaking force fills interior electrical path length and puncture is transformed with needle,
To be adapted to the performance measurement to corn stem.
It is a kind of based on ess-strain sensing application No. is being disclosed in the Chinese invention patent file of 201410392267.X
The stalk lodging resistance test macro patent of invention of device.The invention is blown using simulation of wind unit simulation varying strength natural wind
Crop is measured the ess-strain parameter of tested crop by stress strain gauge, and humidity temperature pickup is arranged in institute
It states on the soil where tested crop, for measuring the temperature and humidity of the soil.The number of processor receiving sensor acquisition
According to, and data are handled, obtain crop stem lodging resistance situation.
Application No. is 201010237712.7 Chinese patents to disclose a kind of hand-held measuring lodging-resistant strength of crop dress
It sets.It using cantilever beam sensor, is fixed with clamping unit, real-time measurement pushes away stalk application to be measured by what clamping unit was transmitted
The value of power, and convert electric signal for the value and send, then pass through obliquity sensor real-time measurement shell inclining with respect to the horizontal plane
Oblique angle angle value is simultaneously converted into electric signal transmission, obtains the lodging resistance parameter of crop.
Above-mentioned existing field crops lodging resistance detection device and method, the lodging resistance of crop can be can be carried out compared with
Effective measurement, but need to damage plant itself, it can not achieve nondestructive measurement；Or need the direct participation of people that can complete,
Vulnerable to survey crew's subjective impact, measurement consistency is poor, is not able to satisfy the demand of the extensive work production of modern agriculture.
Summary of the invention
The present invention, which provides, a kind of overcomes the above problem or at least be partially solved the above problem can be used in lossless inspection
Survey and can measure different height, different growing stages crop lodging resistance device and method.
According to an aspect of the present invention, it provides a kind of for measuring the device of crop lodging resistance comprising support frame,
The upper end of support frame as described above is equipped with the screw rod gone up and down along the vertical direction being driven by motor, and the upper end of the screw rod, which is screwed on, to be connected with
Torque sensor drives the rotating mechanical arm to rotate in the horizontal direction by servo motor.
The measuring device contacts the active force generated by the rotating mechanical arm rotated in rotary course with crop
Size analyzes the lodging resistance of crop certain height position, will not cause to damage to crop, will not influence the normal of crop
Growth.
Meanwhile the height of rotating mechanical arm is adjusted by screw rod, so that measuring device is measured the crop of different height
Lodging resistance.The regulative mode that screw rod adjusts rotating mechanical arm height is simple, enables measuring device to same strain/batch crop
The lodging resistance of different height position or different growing stages can be carried out accurate measurement, and then more acurrate analysis crop is resistant to lodging
Performance.
According to an aspect of the present invention, a kind of method for measuring crop lodging resistance is provided comprising following step
It is rapid:
S1, the side that the device for measuring crop lodging resistance is fixed on to crop to be measured；
S2, height of the adjustment rotating mechanical arm apart from ground, laser range sensor obtain altitude information information and to micro-
Controller exports the altitude information information；
S3, servo motor drive rotating mechanical arm at the uniform velocity to rotate；
S4, torque sensor export the force data in rotating mechanical arm rotary course with crop to microcontroller.
The measurement method measurement process is simple, will not cause to damage to crop, will not influence the normal growth of crop.Measurement
Without human intervention, measurement process is performed fully automatic, and improves detection efficiency at scene.In addition, in measurement process, rotating mechanical arm
It is at the uniform velocity rotated by servo motor driving, effectively raises the accuracy of measurement, avoid manual operation or speed-change process to measurement
Caused by adverse effect.
The application proposes a kind of for measuring the device and method of crop lodging resistance that its advantages are mainly as follows:
(1) rotating mechanical arm having an effect for contacting with crop can either at the uniform velocity rotate, and can be realized vertically
Lifting on direction, realize crop different height, different growing stages lodging resistance measurement, effectively raise measurement range and
Measurement accuracy；
(2) rotating mechanical arm is obtained by torque sensor and contacts the effect force information generated with crop, analysis crop is anti-
Lodge performance, will not cause to damage to crop, will not influence crop normal growth；
(3) by laser range sensor precise measurement rotating mechanical arm at a distance from ground, so that it is special accurately to obtain crop
Determine the lodging resistance of height；
(4) rotating mechanical arm is at least set above screw rod, improves the efficiency of measurement；
(5) microcontroller is set, realizes the automatic operating of measurement process；
(6) long-range, the real-time Transmission of measurement data, lodging resistance measurement method are realized in the setting of tele-control system
Simply, control mode is easy.
Detailed description of the invention
Fig. 1 is according to a kind of for measuring the structural schematic diagram of the device of crop lodging resistance of the embodiment of the present invention；
Fig. 2 is according to a kind of for measuring the flow diagram of the method for crop lodging resistance of the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
It is shown in Figure 1, it is a kind of for measuring the device of crop lodging resistance, including support frame 2, the upper end of support frame 2
Equipped with screw rod 5, screw rod 5 is gone up and down in the vertical direction by the driving of motor 7.The upper end of low bar 5 is connected with rotating mechanical arm 1, rotation
Mechanical arm 1 is horizontally disposed, also, can be rotated in the horizontal direction relative to screw rod 5 by the driving of servo motor 4.
Due to the setting of screw rod 5 and servo motor 4, rotating mechanical arm 1 is enable to go up and down in the vertical direction and adjust height
Position is spent, can also be rotated in the horizontal direction.Since rotating mechanical arm 1 can adjust different height and positions, make
Rotating mechanical arm 1 can measure same strain/batch crop different height position lodging resistance, also can be used in measuring different height
Crop or different growing stages crop lodging resistance, greatly extend measurement range, enhance applicability.
Rotating mechanical arm 1 is connected with torque sensor 3.When measuring the lodging resistance of crop, the driving rotation of servo motor 4
Mechanical arm 1 rotates in the horizontal direction, and in rotary course, rotating mechanical arm 1 contacts with crop to be measured and generate active force, and torque passes
Sensor 3 senses the active force occurred between crop in 1 rotary course of rotating mechanical arm, and the force data is exported,
To be analyzed for the data in later period, to analyze the lodging resistance of crop.
Pass through the lodging resistance of the mechanics analysis crop in 1 rotary course of rotating mechanical arm between crop, measurement
In the process, crop will not be caused to damage, will not influence the normal growth of crop, realize the lossless inspection of crop lodging resistance
It surveys.
The outside of 5 lower end of screw rod and the inside of 2 upper end of support frame are equipped with the thread matching structure to match, 5 upper end of screw rod
Be screwed on a vertical bar 11, and the upper end of vertical bar 11 is screwed on rotating mechanical arm 1.
Support frame 2 has hollow structure, and the lower end of screw rod 5 extend into the inside of support frame 2, and driving screw rod 5 is in vertical side
The inside of support frame 2 is installed on to the motor 7 of lifting.
Motor 7 drives screw rod 5 to rotate, and screw rod 5 is made directly in the vertical direction by thread matching structure relative to support frame 2
Line movement, so that the rotating mechanical arm 1 for being connected to 5 upper end of screw rod be driven to go up and down in the vertical direction and change the height apart from ground
Degree, the crop lodging resistance of measurement different height, different growing stages.
The upper end of vertical bar 11 is arranged in torque sensor 3, and close to rotating mechanical arm 1.When screw rod 5 in the vertical direction
When lifting, torque sensor 3 is gone up and down in the vertical direction with rotating mechanical arm 1 without relative displacement occurs, and guarantees to turn round
Normal, the stable running of square sensor 3.
Servo motor 4 is installed on vertical bar 11, and servo motor 4 is set to the lower section of torque sensor 3.
Laser range sensor 9 is provided on rotating mechanical arm 1, laser range sensor 9 is installed on rotating mechanical arm 1
Lower end surface on.Laser range sensor 9 detects rotating mechanical arm 1 at a distance from ground, when the crop for measuring certain altitude
When lodging resistance, laser range sensor 9 records the altitude information and exports, for analyzing the crop in certain height position
The lodging resistance set.
Microcontroller 6 is set to inside the hollow structure of support frame 2.Microcontroller 6 respectively with torque sensor 3 and laser
Distance measuring sensor 9 is connected, to receive and process the information that torque sensor 3 and laser range sensor 9 export；Microcontroller 6
It is connected respectively with servo motor 4 and motor 7, to control the adjusting of measurement height and 1 revolving speed of rotating mechanical arm.
Microcontroller 6 controls motor 7 and operates, and motor 7 drives screw rod 5 to make elevating movement in the vertical direction, to drive
The rotating mechanical arm 1 of 5 top of screw rod adjusts height and position, measures the lodging resistance of the crop of different height position；Microcontroller
Device 6 control servo motor 4 operate, servo motor 4 drive rotating mechanical arm 1 rotate in the horizontal direction, by rotary course with
The active force generated between crop measures the lodging resistance of crop.
Screw rod 5 drives rotating mechanical arm 1 to adjust to suitable height when measuring, and is arranged on rotating mechanical arm 1
Laser range sensor 9 obtains rotating mechanical arm 1 at a distance from ground, to obtain the certain height positional number of crop to be measured
According to, and the altitude information is exported to microcontroller 6, for analyzing crop lodging resistance.
Servo motor 4 drives rotating mechanical arm 1 to rotate in the horizontal direction, and rotating mechanical arm 1 is in rotary course
In contacted and power of having an effect with crop, the torque sensor 3 connecting with rotating mechanical arm 1 senses the active force, and should
Force data is exported to microcontroller 6, for analyzing crop lodging resistance.
In a specific embodiment, microcontroller 6 passes through wireless communication mode and tele-control system connection.
Tele-control system includes remote collection controller, wireless transport module and wireless acquisition module.Remote collection control
Device processed exports action command to microcontroller 6 by wireless transport module and wireless acquisition module, and microcontroller 6 is according to long-range
The instruction control motor 7 and servo motor 4 of control system act, and to control the lifting and rotation of rotating mechanical arm 1, are made with measuring
The lodging resistance of object；The data information that microcontroller 6 obtains is delivered to far by wireless acquisition module and wireless transport module
Journey acquisition controller analyzes the lodging resistance of crop.
Action signal is delivered to microcontroller 6 by tele-control system, and microcontroller 6 is conveyed according to tele-control system
Signal, controls motor 7 and servo motor 4 acts accordingly.
Microcontroller 6 receives the active force number that the altitude information that laser range sensor 9 conveys and torque sensor 3 convey
According to, and the altitude information and force data are exported to tele-control system, it is used for network analysis crop lodging resistance.
Power supply unit 8 is also equipped in the inside of support frame 2.In a specific embodiment, power supply unit 8 is using too
Positive energy power supply module.It is charged using solar energy to power supply unit, has effectively delayed cruise duration and the service life of measuring device,
Meanwhile it is energy saving, optimization efficiency utilizes.
Power supply unit 8, motor 7, servo motor 4 are mounted directly or indirectly on support frame 2, not only make measuring device
It is compact-sized, moreover, enhancing the weight of support frame 2, its frictional force with ground is increased, improves the stationarity of support frame 2,
In favor of the stable operation of measuring device.
The lower end of support frame 2 be equipped with support leg 10, support leg 10 at least one, further, it is possible to be inserted into soil.?
Multiple support legs 10 being inserted into soil are arranged in the lower end of support frame 2, fully ensure that the stationarity of support frame 2, to protect
The measurement for demonstrate,proving measuring device is stable and safe.
Rotating mechanical arm 1 at least one be arranged in the top of screw rod 5.In order to enhance the measurement efficiency of measuring device,
The rotating arm of one or more is set, wider, different height position crop lodging resistance can be measured simultaneously.
It is shown in Figure 2, a method of for measuring crop lodging resistance, comprising the following steps:
S1, the side that the device for measuring crop lodging resistance is fixed on to crop to be measured；
S2, height of the adjustment rotating mechanical arm 1 apart from ground, laser range sensor 9 obtain altitude information information and to
Microcontroller 6 exports the altitude information information；
S3, servo motor 4 drive rotating mechanical arm 1 at the uniform velocity to rotate；
S4, torque sensor 3 export the force data in 1 rotary course of rotating mechanical arm with crop to microcontroller
6。
In above-mentioned steps S2, when needing to measure the lodging resistance of crop certain altitude position, screw rod is driven by motor 7
5 go up and down in the vertical direction to suitable position, to adjust rotating mechanical arm 1 to the position flushed with crop height to be measured.To
After height and position determines, laser range sensor 9 obtains the altitude information information, and the altitude information information is exported to micro-control
Device 6 processed, for analyzing crop in the lodging resistance of the height and position.
It in above-mentioned steps S3, issues and instructs from microcontroller 6 to servo motor 4, servo motor 4 operates, and drives whirler
Tool arm 1 at the uniform velocity rotates in the horizontal direction, contacts in 1 rotary course of rotating mechanical arm with crop, generates active force.Measurement process
In, servo motor 4 drives rotating mechanical arm 1 at the uniform velocity to rotate, and rotation speed variation in 1 rotary course of rotating mechanical arm is avoided to cause
The problem of measurement data inaccuracy.
In above-mentioned steps S4, in 1 rotary course of rotating mechanical arm, torque sensor 3 senses rotating mechanical arm 1 and crop
The force data generated is contacted, and the force data is exported to microcontroller 6, with the lodging resistance for analyzing crop
Energy.
Using above-mentioned steps, the lodging resistance of crop certain height position can be effectively collected, without damaging crop,
The growth of crop will not be influenced, meanwhile, this method is easy to operate, and measurement is accurate.
On the basis of above-mentioned implementation process, carry out step S5: the data information that microcontroller 6 will acquire is sent to remotely
Control system.
Mode is exported to remote the height position information and force data information that microcontroller 6 will acquire by wireless communication
Process control system, so that the lodging resistance to crop can be carried out analysis.
Using the wireless communication connection of microcontroller 6 and tele-control system, the test of crop lodging resistance can be realized
Full-automatic implementation, save human and material resources, simplify measurement process, shorten measurement, data analysis time.
It further include step S6 on the basis of above-mentioned implementation process: the instruction control of the reception tele-control system of microcontroller 6
The lifting of rotating mechanical arm 1 processed repeats step S2-S5, it is anti-to measure same strain/batch crop different location height to another height
Lodging or another strain with different height/batch crop lodging resistance.
It is sent and is instructed to microcontroller using tele-control system, remotely operate the test of crop lodging resistance can,
Control, is not necessarily to execute-in-place, and great convenience test controls and operates.
After the completion of the lodging resistance test of a certain height and position to one plant/batch crop, tele-control system is to micro-
Controller 6 issues instruction, and microcontroller 6 controls motor 7 and operate according to the instruction, drives the lifting of screw rod 5 to another height position
It sets, repeats step S2-S5, measure same strain/batch another height and position of crop lodging resistance.
Accurate measurement can be carried out to the lodging resistance of the different height position of one plant/batch of crop, can more accurately divide
Analyse the lodging resistance of crop.
Simultaneously as can't cause to damage to crop, it will not influenced just during measuring lodging resistance
It is frequently grown, therefore, device is placed in same position for a long time, can be realized and same strain/batch crop different growing stage is resisted
The automatic measurement for the performance that lodges.
Of the invention is a kind of for measuring the device of crop lodging resistance, including support frame 2, and screw rod 5 is set to support frame 2
Upper end, driving screw rod 5 is set to the inside of support frame 2 in the motor 7 that vertical direction is gone up and down；The upper end connection of screw rod 5 is used for
The servo motor 4 for driving rotating mechanical arm 1 to rotate, the upper end of servo motor 4 is sequentially connected to rotate for measuring rotating mechanical arm 1
In the process between crop active force torque sensor 3 and rotating mechanical arm 1；The lower end surface of rotating mechanical arm 1 is equipped with survey
Measure the laser range sensor 9 of rotating mechanical arm 1 and ground distance height；For controlling the microcontroller of motor 7, servo motor 4
Device 6 is set to the inside of support frame 2, and microcontroller 6 is also used to receive laser range sensor 9 simultaneously and torque sensor 3 is defeated
Data information out, and the information is exported to tele-control system, for analyzing crop lodging resistance.
A kind of method for measuring crop lodging resistance of the invention, measuring device is set up in by crop；Long-range control
Mode is to the transmission instruction of microcontroller 6 for being set to 2 inside of bracket frame by wireless communication for system processed, and microcontroller 6 is according to finger
Control motor 7 or servo motor 4 is enabled to act；The upper end of support frame 2 is installed by the silk for being driven by motor 7 and being gone up and down in the vertical direction
Bar 5 drives the rotating mechanical arm 1 for being set to 5 top of screw rod to go up and down in the vertical direction, height of the rotating mechanical arm 1 apart from ground
Degree information is measured by the laser range sensor 9 being set on rotating mechanical arm 1；The upper end of screw rod 5 connects servo motor 4, watches
It takes the control rotating mechanical arm 1 of motor 4 to rotate in the horizontal direction, contacts and generate with crop in 1 rotary course of rotating mechanical arm
Active force, the effect force information are obtained by the torque sensor 3 connecting with rotating mechanical arm 1；What laser range sensor 9 measured
The effect force information that elevation information and torque sensor 3 obtain is exported to the microcontroller 6 for being set to 2 inside of support frame, micro-
By data information, mode is exported to tele-control system controller 6 by wireless communication.
Finally, the present processes are only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of for measuring the device of crop lodging resistance, it is characterised in that: it includes support frame (2), support frame as described above (2)
Upper end be equipped with the screw rod (5) gone up and down along the vertical direction that is driven by motor (7), the upper end of the screw rod (5) is connected with rotation
Mechanical arm (1), the rotating mechanical arm (1) are connected with torque sensor (3), and the rotating mechanical arm (1) is by servo motor (4)
Driving to rotate in the horizontal direction.
2. as claimed in claim 1 a kind of for measuring the device of crop lodging resistance, it is characterised in that: the screw rod (5) it is upper
End, which is screwed on, supports the vertical bar (11) of the rotating mechanical arm (1), and it is close that the torque sensor (3) is set to vertical bar (11) upper end
The position of rotating mechanical arm (1).
3. as claimed in claim 1 a kind of for measuring the device of crop lodging resistance, it is characterised in that: the rotating mechanical arm
(1) it is provided on for measuring height of the rotating mechanical arm (1) apart from ground and exporting the laser ranging of the elevation information
Sensor (9).
4. as claimed in claim 3 a kind of for measuring the device of crop lodging resistance, it is characterised in that: support frame as described above (2)
Inside is equipped with the microcontroller for receiving and processing the output information of the torque sensor (3) and laser range sensor (9)
(6), the microcontroller (6) is also used to control the operation of the motor (7) and servo motor (4), with realize measurement height and
The adjusting of rotating mechanical arm (1) revolving speed.
5. as claimed in claim 1 a kind of for measuring the device of crop lodging resistance, it is characterised in that: support frame as described above (2)
Inside is installed by the power supply unit (8) for being provided with electric power energy.
6. such as any device for being used to measure crop lodging resistance of claim 1-5, it is characterised in that: support frame as described above
(2) lower end is equipped at least one support leg being inserted into soil (10).
7. such as any device for being used to measure crop lodging resistance of claim 1-5, it is characterised in that: the screw rod (5)
At least one rotating mechanical arm (1) is arranged in top.
8. a kind of method that device as claimed in claim 4 is used to measure crop lodging resistance, which is characterized in that it includes following
Step:
S1, the side that the device for measuring crop lodging resistance is fixed on to crop to be measured；
S2, adjustment rotating mechanical arm (1) height apart from ground, laser range sensor (9) obtain altitude information information and to
Microcontroller (6) exports the altitude information information；
S3, servo motor (4) drive rotating mechanical arm (1) at the uniform velocity to rotate；
S4, torque sensor (3) export the force data in rotating mechanical arm (1) rotary course with crop to microcontroller
(6)。
9. the method as claimed in claim 8 for measuring crop lodging resistance, which is characterized in that further include step S5: microcontroller
The data information that device (6) will acquire is sent to tele-control system.
10. the method as claimed in claim 9 for measuring crop lodging resistance, which is characterized in that further include step S6: microcontroller
Device (6) receives the lifting of instruction control rotating mechanical arm (1) of tele-control system to another height, repeats step S2-S5, surveys
It measures same strain/lodging resistance of batch crop different location height or another strain with different height/and criticizes the resistant to lodging of crop
Performance.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107991228B (en) * | 2017-11-09 | 2020-10-16 | 贾鑫 | Measuring tool for breeding lodging-resistant corn varieties |
| CN107825125B (en) * | 2017-11-30 | 2023-06-23 | 中国地质大学（武汉） | Screw hole positioning and locking screw unloading device based on visual servo |
| 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 |
| CN110763547B (en) * | 2019-11-18 | 2022-02-22 | 河南科技学院 | Simulation crop group and correction method for resistance coefficient of lodging-resistant strength measuring probe |
| CN111442750B (en) * | 2020-04-30 | 2022-03-08 | 国电科学技术研究院有限公司 | Device and method for measuring relative elevation of bearing seat of steam turbine generator unit |
| CN113984519B (en) * | 2021-10-21 | 2023-07-25 | 石家庄益康农科技发展有限公司 | Corn mechanics research device |
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