CN103575203B - A kind of plant leaf blade thickness nondestructive measurement instrument and measuring method of adjusting prepressing power - Google Patents
A kind of plant leaf blade thickness nondestructive measurement instrument and measuring method of adjusting prepressing power Download PDFInfo
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- CN103575203B CN103575203B CN201310585090.0A CN201310585090A CN103575203B CN 103575203 B CN103575203 B CN 103575203B CN 201310585090 A CN201310585090 A CN 201310585090A CN 103575203 B CN103575203 B CN 103575203B
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- precompression
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- leaf blade
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Abstract
Plant leaf blade thickness nondestructive measurement instrument and the measuring method of adjusting prepressing power, relate to a kind of plant leaf blade thickness nondestructive measurement instrument. It is for plant leaf blade thickness accurately being measured in the situation that ensureing that plant leaf blade is harmless. The present invention has designed a kind of movement of the operating mechanism control precompression bar that carries out trace adjusting, on precompression bar, pressure sensor is installed, sensor outgoing signal is passed to single-chip microcomputer through A/D conversion, and single-chip microcomputer is passed to host computer afterwards, shows the size of its precompression via host computer; After precompression bar is fixing, the probe contact plant leaf blade of inductive displacement transducer, and carry out micro-change in displacement with the variation of vane thickness, cause that along with probe is mobile sensor internal inductance changes, the signal that sensor spreads out of is passed to single-chip microcomputer through A/D conversion, by shown the thick situation of change of its real-time leaf by host computer. Thereby the vane thickness that carries out determining under precompression is measured. The present invention is applicable to plant leaf blade thickness nondestructive measurement.
Description
Technical field
The present invention relates to a kind of plant leaf blade thickness nondestructive measurement instrument.
Background technology
Present existing Measurement of Thickness of Plant Leaf is all non-contact measurement substantially, the certainty of measurement of this measuring methodLower and be easily subject to external environmental condition as the impact of the conditions such as temperature, vibrations, wind speed. Now, contact withoutDamage Measurement of Thickness of Plant Leaf device aspect domestic almost blank, the China Measures Institute designed a contact vane thickness and surveyedAmount instrument, but their gauge head is directly to contact by gravity, can not accurately control, so can not accomplish harmless surveyAmount, and measurement data is also subject to the impact of blade deformation.
Summary of the invention
The present invention is in order in the situation that ensureing that plant leaf blade is harmless, plant leaf blade thickness accurately to be measured, thereby providesA kind of plant leaf blade thickness nondestructive measurement instrument of adjusting prepressing power.
A plant leaf blade thickness nondestructive measurement instrument for adjusting prepressing power, it comprise blade emplacing platform 1, checkout gear support 2,Inductive displacement transducer 3, decelerating step motor 4, Quincunx elastic coupler 5, precompression provide mechanism's enclosing cover 6, pressPower sensor 8, worm shaft 9, bearing 10, gear 11, gear shaft 12, No. two bearings 13, worm gear 14, precompressedPower provides mechanism shell 15, precompression bar 16, spring 17, A/D converter, single-chip microcomputer and host computer;
The front end one of checkout gear support 2 is fixed with blade emplacing platform 1, and described blade emplacing platform 1 is semicircle loop configuration;The main body of inductive displacement transducer 3 is arranged on checkout gear support 2 inside, and the probe of inductive displacement transducer 3 stretches outCheckout gear support 2, and be positioned at the open area of blade emplacing platform 1; The stator of decelerating step motor 4 is fixed on inductance typeIn the main body of displacement transducer 3, precompression provides side correspondence relative on mechanism shell 15 to have two through holes, described inNo. two bearing 13 is fixed therein in a through hole; The output shaft of described decelerating step motor 4 stretches into through another through holeProvide mechanism shell 15 inside to precompression, the output shaft of decelerating step motor 4 is by Quincunx elastic coupler 5 and snailOne end of bar axle 9 connects; The other end of described worm shaft 9 is connected with No. two bearing 13 bearings;
Precompression provides in mechanism shell 15 worm gear 14 is installed, and described worm gear 14 engages with worm shaft 9; Worm gear 14Center is fixedly connected with one end of gear shaft 12; The other end of described gear shaft 12 and bearing 10 bearing fits;
Precompression provides on the bottom surface of mechanism shell 15 and has through hole, provides on the end face of mechanism shell 15 inside at precompressionThe position corresponding with this through hole is fixed with spring position-limiting tube, and spring 17 is arranged in this spring position-limiting tube, the top of precompression bar 16End stretch in spring position-limiting tube and with spring 17 close contacts; The other end of described precompression bar 16 provides machine by precompressionThrough hole on structure housing 15 bottom surfaces stretches out precompression provides mechanism shell 15, and the other end of described precompression bar 16 is positioned at electricityDirectly over the probe of sense formula displacement transducer 3;
In the main body of described precompression bar 16, be provided with tooth bar, in the main body of gear shaft 12, be set with and be fixed with gear 11,Tooth bar in the main body of described gear 11 and precompression bar 16 engages; Precompression provides mechanism's enclosing cover 6 to provide machine by precompressionStructure housing 15 seals;
The bottom of precompression bar 16 is provided with pressure sensor 8, and signal output part and the A/D of described pressure sensor 8 turnThe signal input part of parallel operation connects; The signal output part of described A/D converter is connected with the signal input part of single-chip microcomputer; InstituteState the signal output part of single-chip microcomputer and the signal input part of host computer is connected.
The plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power based on above-mentioned is measured the method for plant leaf blade thickness, itRealized by following steps:
Step 1, the rotation of employing decelerating step motor control worm screw, rise to blade emplacing platform at a distance of 0.8 precompression barTo the position of 1.2cm;
Step 2, plant leaf blade to be measured is put on blade emplacing platform, and displacement sensor probe is contacted to plant leaf blade following tableFace;
Step 3, to the pressure sensor operation of returning to zero;
The control precompression bar of step 4, employing decelerating step motor declines; And detect in real time precompression value, when precompression valueWhile arriving preset value, control decelerating step motor out of service;
Step 5, to the displacement transducer operation of returning to zero, and under preset pressure, carry out vane thickness measurement.
The present invention accurately measures plant leaf blade thickness in the situation that ensureing that plant leaf blade is harmless, thereby it is raw to obtain plantMorphological change in long period. Certainty of measurement on year-on-year basis prior art has improved 20%.
Brief description of the drawings
Fig. 1 is Split type structure schematic diagram of the present invention; Fig. 2 is the structural representation after the present invention assembles.
Detailed description of the invention
Detailed description of the invention one, in conjunction with Fig. 1 and Fig. 2, this detailed description of the invention is described, a kind of plant leaf blade of adjusting prepressing powerThickness nondestructive measurement instrument, it comprises blade emplacing platform 1, checkout gear support 2, inductive displacement transducer 3, the step of slowing downEnter motor 4, Quincunx elastic coupler 5, precompression provide mechanism's enclosing cover 6, pressure sensor 8, worm shaft 9, No. oneBearing 10, gear 11, gear shaft 12, No. two bearings 13, worm gear 14, precompressions provide mechanism shell 15, precompressionBar 16, spring 17, A/D converter, single-chip microcomputer and host computer;
The front end one of checkout gear support 2 is fixed with blade emplacing platform 1, and described blade emplacing platform 1 is semicircle loop configuration;The main body of inductive displacement transducer 3 is arranged on checkout gear support 2 inside, and the probe of inductive displacement transducer 3 stretches outCheckout gear support 2, and be positioned at the open area of blade emplacing platform 1; The stator of decelerating step motor 4 is fixed on inductance typeIn the main body of displacement transducer 3, precompression provides side correspondence relative on mechanism shell 15 to have two through holes, described inNo. two bearing 13 is fixed therein in a through hole; The output shaft of described decelerating step motor 4 stretches into through another through holeProvide mechanism shell 15 inside to precompression, the output shaft of decelerating step motor 4 is by Quincunx elastic coupler 5 and snailOne end of bar axle 9 connects; The other end of described worm shaft 9 is connected with No. two bearing 13 bearings;
Precompression provides in mechanism shell 15 worm gear 14 is installed, and described worm gear 14 engages with worm shaft 9; Worm gear 14Center is fixedly connected with one end of gear shaft 12; The other end of described gear shaft 12 and bearing 10 bearing fits;
Precompression provides on the bottom surface of mechanism shell 15 and has through hole, provides on the end face of mechanism shell 15 inside at precompressionThe position corresponding with this through hole is fixed with spring position-limiting tube, and spring 17 is arranged in this spring position-limiting tube, the top of precompression bar 16End stretch in spring position-limiting tube and with spring 17 close contacts; The other end of described precompression bar 16 provides machine by precompressionThrough hole on structure housing 15 bottom surfaces stretches out precompression provides mechanism shell 15, and the other end of described precompression bar 16 is positioned at electricityDirectly over the probe of sense formula displacement transducer 3;
In the main body of described precompression bar 16, be provided with tooth bar, in the main body of gear shaft 12, be set with and be fixed with gear 11,Tooth bar in the main body of described gear 11 and precompression bar 16 engages; Precompression provides mechanism's enclosing cover 6 to provide machine by precompressionStructure housing 15 seals;
The bottom of precompression bar 16 is provided with pressure sensor 8, and signal output part and the A/D of described pressure sensor 8 turnThe signal input part of parallel operation connects; The signal output part of described A/D converter is connected with the signal input part of single-chip microcomputer; InstituteState the signal output part of single-chip microcomputer and the signal input part of host computer is connected.
Operation principle: the contact vane thickness that the present invention has designed under a kind of adjusting prepressing power based on inductance principle is measuredInstrument. In this device, design a kind of movement of the operating mechanism control precompression bar that carries out trace adjusting, at precompressionPressure sensor is installed on bar, and sensor outgoing signal is passed to single-chip microcomputer through A/D conversion, and single-chip microcomputer is passed to host computer afterwards,Show the size of its precompression via host computer; After precompression bar is fixing, the probe contact plant of inductive displacement transducerBlade, and carry out micro-change in displacement with the variation of vane thickness, cause that along with probe is mobile sensor internal inductance changes,The signal that sensor spreads out of is passed to single-chip microcomputer through A/D conversion, by shown the thick situation of change of its real-time leaf by host computer. FromAnd the vane thickness that carries out determining under precompression is measured.
In the present invention, inductive displacement transducer 3 is installed in checkout gear support 2; Precompression bar 16 is installed on precompressionProvide in mechanism and eliminate its assemblage gap by spring 17, and precompression bar is stabilized in mechanism under the effect of spring force;On precompression bar, tooth bar is installed, it is engaged with pinion 11; Pinion 11 and worm gear 14 connect through gear shaft 12,And link; Pressure sensor 8 is installed on the end of precompression bar 16; Decelerator 4 by shaft coupling 5 withThereby worm screw 9 is connected and controls its rotation and control whole precompression the lifting of mechanism is provided.
Because worm gear diameter is greater than pinion diameter and for certain ratio, and pinion and worm gear are coaxial linkage mechanism; WhenWhen turbine drives pinion rotation, the inverse ratio that the ratio of two gear displacements of the lines is its diameter; Because precompression bar is to pass through toothBar engages with pinion, thereby lifting is carried out in realization under the drive of pinion, enters so work as Motor Control worm and gearWhen row motion, precompression bar only can carry out the movement of small distance under the drive of pinion, thereby realizes the trace of precompression barRegulate.
Because precompression is adjustable, measuring instrument of the present invention can make precompression bar with plant leaf blade in contacting but do not apply the shape of powerState, thus make measuring instrument in the situation that of this approximate ideal, carry out the nondestructive measurement of vane thickness.
The leaves of plants of a kind of adjusting prepressing power described in detailed description of the invention two, this detailed description of the invention and detailed description of the invention oneThe difference of sheet thickness nondestructive measurement instrument is, it also comprises fastening bolt 7, and described precompression provides mechanism's enclosing cover 6 by tightFixing bolt 7 provides mechanism shell 15 to seal precompression.
Planting of a kind of adjusting prepressing power described in detailed description of the invention three, this detailed description of the invention and detailed description of the invention one or twoThe difference of thing vane thickness nondestructive measurement instrument is, decelerating step motor 4 is PG28 planetary reduction gear stepper motors.
The leaves of plants of a kind of adjusting prepressing power described in detailed description of the invention four, this detailed description of the invention and detailed description of the invention threeThe difference of sheet thickness nondestructive measurement instrument is, the diameter of worm gear 14 is four times of gear 11 diameters.
The harmless survey of plant leaf blade thickness of detailed description of the invention five, a kind of adjusting prepressing power based on described in detailed description of the invention oneAmount instrument is measured the method for plant leaf blade thickness, and it is realized by following steps:
Step 1, the rotation of employing decelerating step motor control worm screw, rise to blade emplacing platform at a distance of 0.8 precompression barTo the position of 1.2cm;
Step 2, plant leaf blade to be measured is put on blade emplacing platform, and displacement sensor probe is contacted to plant leaf blade following tableFace;
Step 3, to the pressure sensor operation of returning to zero;
The control precompression bar of step 4, employing decelerating step motor declines; And detect in real time precompression value, when precompression valueWhile arriving preset value, control decelerating step motor out of service;
Step 5, to the displacement transducer operation of returning to zero, and under preset pressure, carry out vane thickness measurement.
Detailed description of the invention six, survey according to the plant leaf blade thickness of a kind of adjusting prepressing power described in detailed description of the invention five is harmlessThe difference that amount instrument is measured the method for plant leaf blade thickness is, in step 1, the distance of precompression bar and blade emplacing platform is1.0cm。
Claims (6)
1. a plant leaf blade thickness nondestructive measurement instrument for adjusting prepressing power, is characterized in that: it comprise blade emplacing platform (1),Checkout gear support (2), inductive displacement transducer (3), decelerating step motor (4), Quincunx elastic coupler (5),Precompression provide mechanism's enclosing cover (6), pressure sensor (8), worm shaft (9), a bearing (10), gear (11),Gear shaft (12), No. two bearings (13), worm gear (14), precompression provide mechanism shell (15), precompression bar (16),Spring (17), A/D converter, single-chip microcomputer and host computer;
The front end one of checkout gear support (2) is fixed with blade emplacing platform (1), and described blade emplacing platform (1) is semicircleLoop configuration; The main body of inductive displacement transducer (3) is arranged on checkout gear support (2) inside, and inductance type force-displacement passesThe probe of sensor (3) stretches out checkout gear support (2), and is positioned at the open area of blade emplacing platform (1); Deceleration steppingThe stator of motor (4) is fixed in the main body of inductive displacement transducer (3), and precompression provides on mechanism shell (15)Relative side correspondence has two through holes, and described No. two bearings (13) are fixed therein in a through hole; Described deceleration stepThe output shaft that enters motor (4) extend into precompression through another through hole provides mechanism shell (15) inside, deceleration stepping electricityThe output shaft of machine (4) is connected with one end of worm shaft (9) by Quincunx elastic coupler (5); Described worm shaft (9)The other end be connected with No. two bearings (13) bearing;
Precompression provides in mechanism shell (15) worm gear (14) is installed, and described worm gear (14) engages with worm shaft (9);The center of worm gear (14) is fixedly connected with one end of gear shaft (12); The other end and one of described gear shaft (12)Number bearing (10) bearing fit;
Precompression provides on the bottom surface of mechanism shell (15) and has through hole, provides mechanism shell (15) inner at precompressionOn end face, the position corresponding with this through hole is fixed with spring position-limiting tube, and spring (17) is arranged in this spring position-limiting tube, precompressionThe top of bar (16) stretch in spring position-limiting tube and with spring (17) close contact; Another of described precompression bar (16)End provides through hole on mechanism shell (15) bottom surface to stretch out precompression by precompression mechanism shell (15), described precompressed is providedThe other end of power bar (16) be positioned at inductive displacement transducer (3) probe directly over;
In the main body of described precompression bar (16), be provided with tooth bar, in the main body of gear shaft (12), be set with and be fixed with gear(11), the tooth bar in the main body of described gear (11) and precompression bar (16) engages; Precompression provides mechanism's enclosing cover (6)Provide mechanism shell (15) sealing by precompression;
The bottom of precompression bar (16) is provided with pressure sensor (8), the signal output part of described pressure sensor (8) withThe signal input part of A/D converter connects; The signal output part of described A/D converter is connected with the signal input part of single-chip microcomputer;The signal output part of described single-chip microcomputer is connected with the signal input part of host computer.
2. the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power according to claim 1, is characterized in that itAlso comprise fastening bolt (7), described precompression provides mechanism's enclosing cover (6) to provide machine by fastening bolt (7) by precompressionStructure housing (15) sealing.
3. the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power according to claim 1, is characterized in that subtractingSpeed stepper motor (4) is PG28 planetary reduction gear stepper motor.
4. the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power according to claim 1, is characterized in that snailThe diameter of wheel (14) is four times of gear (11) diameter.
5. the measurement of the plant leaf blade thickness nondestructive measurement instrument based on a kind of adjusting prepressing power claimed in claim 1 plant leaf blade is thickThe method of degree, is characterized in that: it is realized by following steps:
Step 1, the rotation of employing decelerating step motor control worm screw, rise to precompression bar and blade emplacing platform 0.8cm apartTo the position of 1.2cm;
Step 2, plant leaf blade to be measured is put on blade emplacing platform, and by inductive displacement transducer probe contact leaves of plantsSheet lower surface;
Step 3, to the pressure sensor operation of returning to zero;
Step 4, employing decelerating step motor control precompression bar decline; And detect in real time precompression value, when precompression value arrivesWhile reaching preset value, control decelerating step motor out of service;
Step 5, to the inductive displacement transducer operation of returning to zero, and under preset pressure, carry out vane thickness measurement.
6. the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power according to claim 5 measurement plant leaf blade is thickThe method of degree, is characterized in that in step 1, the distance of precompression bar and blade emplacing platform is 1.0cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310585090.0A CN103575203B (en) | 2013-11-19 | 2013-11-19 | A kind of plant leaf blade thickness nondestructive measurement instrument and measuring method of adjusting prepressing power |
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| CN201310585090.0A CN103575203B (en) | 2013-11-19 | 2013-11-19 | A kind of plant leaf blade thickness nondestructive measurement instrument and measuring method of adjusting prepressing power |
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| CN103575203A CN103575203A (en) | 2014-02-12 |
| CN103575203B true CN103575203B (en) | 2016-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783693A (en) * | 2014-12-12 | 2016-07-20 | 通用电气公司 | Method And Apparauts For Measuring Thickness Of An Object |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375606B (en) * | 2018-01-10 | 2020-11-20 | 江苏大学 | Device and method for measuring water content of plant leaves |
| CN108534693B (en) * | 2018-06-28 | 2023-10-27 | 四川农业大学 | Tea gathering depth and height measuring device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058246U (en) * | 1989-09-26 | 1990-06-13 | 河北工学院 | Dynamic pachometer for plate form object |
| CN101074863A (en) * | 2006-04-26 | 2007-11-21 | 斯奈克玛 | Wall thickness measurement, in particular of a vane, by eddy currents |
| CN101126624A (en) * | 2007-09-18 | 2008-02-20 | 中国计量学院 | Plant leaf parameter measuring instrument |
| CN102175132A (en) * | 2011-02-22 | 2011-09-07 | 南通宏大实验仪器有限公司 | Full-automatic thickness tester for geo-technical synthetic material |
| CN203534515U (en) * | 2013-11-19 | 2014-04-09 | 东北林业大学 | Plant leaf thickness nondestructive measurement instrument with adjustable pre-pressure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2495868B (en) * | 2009-03-18 | 2013-10-23 | Helmut Fischer Gmbh Inst Fur Elektronik Und Messtechnik | Measurement stand and method of its electrical control |
-
2013
- 2013-11-19 CN CN201310585090.0A patent/CN103575203B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058246U (en) * | 1989-09-26 | 1990-06-13 | 河北工学院 | Dynamic pachometer for plate form object |
| CN101074863A (en) * | 2006-04-26 | 2007-11-21 | 斯奈克玛 | Wall thickness measurement, in particular of a vane, by eddy currents |
| CN101126624A (en) * | 2007-09-18 | 2008-02-20 | 中国计量学院 | Plant leaf parameter measuring instrument |
| CN102175132A (en) * | 2011-02-22 | 2011-09-07 | 南通宏大实验仪器有限公司 | Full-automatic thickness tester for geo-technical synthetic material |
| CN203534515U (en) * | 2013-11-19 | 2014-04-09 | 东北林业大学 | Plant leaf thickness nondestructive measurement instrument with adjustable pre-pressure |
Non-Patent Citations (2)
| Title |
|---|
| 传感技术在精确检测植物水分中的应用研究;蒋云飞等;《林业机械与木工设备》;20041231;第32卷(第12期);第49-51页 * |
| 植物叶片厚度微增量精确测量系统的研究设计;刘九庆等;《森林工程》;20081130;第24卷(第6期);第18-20页 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783693A (en) * | 2014-12-12 | 2016-07-20 | 通用电气公司 | Method And Apparauts For Measuring Thickness Of An Object |
| CN105783693B (en) * | 2014-12-12 | 2020-01-21 | 通用电气公司 | Method and device for measuring the thickness of an object |
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