CN103575203A - Plant leave thickness nondestructive measurement instrument with adjustable pre-pressure and measurement method - Google Patents

Plant leave thickness nondestructive measurement instrument with adjustable pre-pressure and measurement method Download PDF

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Publication number
CN103575203A
CN103575203A CN201310585090.0A CN201310585090A CN103575203A CN 103575203 A CN103575203 A CN 103575203A CN 201310585090 A CN201310585090 A CN 201310585090A CN 103575203 A CN103575203 A CN 103575203A
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China
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precompression
bar
gear
plant leaf
measurement instrument
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CN201310585090.0A
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CN103575203B (en
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刘九庆
朱福安
董光辉
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Northeast Forestry University
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Northeast Forestry University
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Abstract

The invention discloses a plant leave thickness nondestructive measurement instrument with the adjustable pre-pressure and a measurement method, and relates to the plant leave thickness nondestructive measurement instrument. The plant leave thickness nondestructive measurement instrument is used for ensuring accurate measurement on the thicknesses of plant leaves under the situation that the plant leaves are not destructive. A control mechanism which can conduct micro-adjustment is designed to control a pre-pressure rod to move, a pressure sensor is installed on the pre-pressure rod, signals transmitted by the sensor are transmitted to a single chip microcomputer through A/D conversion and then transmitted by the single chip microcomputer to an upper computer, and the upper computer displays the size of the pre-pressure. After the pre-pressure rod is fixed, a probe of an inductive displacement sensor makes contact with the plant leaves and conducts micro-displacement changes along with changes of the thicknesses of the leaves, changes of inductance inside the sensor are caused along with the movement of the probe, signals transmitted by the sensor are transmitted to the single chip microcomputer through A/D conversion, and the upper computer displays the real-time leave thickness change situation, so that the leave thickness measurement under the fixed pre-pressure is carried out. The plant leave thickness nondestructive measurement instrument and the measurement method are applicable to the plant leave thickness nondestructive measurement.

Description

A kind of plant leaf blade thickness nondestructive measurement instrument and measuring method of adjusting prepressing power
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, and the measuring accuracy of this measuring method is lower and be easily subject to external environmental condition as the impact of the conditions such as temperature, vibrations, wind speed.Now, domestic almost blank aspect the harmless Measurement of Thickness of Plant Leaf device of contact, the China Measures Institute designed a contact vane thickness measuring instrument, but their gauge head is directly to contact by gravity, can not accurately control, so can not accomplish nondestructive measurement, 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 guaranteeing that plant leaf blade is harmless, plant leaf blade thickness accurately to be measured, thereby a kind of plant leaf blade thickness nondestructive measurement instrument of adjusting prepressing power is provided.
A plant leaf blade thickness nondestructive measurement instrument for power, it comprises that blade emplacing platform 1, pick-up unit support 2, inductive displacement transducer 3, decelerating step motor 4, Quincunx elastic coupler 5, precompression provide mechanism's enclosing cover 6, pressure transducer 8, worm shaft 9, bearing 10, gear 11, gear shaft 12, No. two bearings 13, worm gear 14, precompressions that mechanism shell 15, precompression bar 16, spring 17, A/D converter, single-chip microcomputer and host computer are provided;
The front end one of pick-up unit 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 pick-up unit support 2 inside, and the probe of inductive displacement transducer 3 stretches out pick-up unit support 2, and is positioned at the open area of blade emplacing platform 1; The stator of decelerating step motor 4 is fixed in the main body of inductive displacement transducer 3, and precompression provides side correspondence relative on mechanism shell 15 to have two through holes, and described No. two bearings 13 are fixed therein in a through hole; The output shaft of described decelerating step motor 4 extend into precompression through another through hole provides mechanism shell 15 inside, and the output shaft of decelerating step motor 4 is connected with one end of worm shaft 9 by Quincunx elastic coupler 5; 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 meshes with worm shaft 9; The center of worm gear 14 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, at precompression, provide position corresponding with this through hole on the end face of mechanism shell 15 inside to be fixed with spring position-limiting tube, spring 17 is arranged in this spring position-limiting tube, the top of precompression bar 16 stretch in spring position-limiting tube and with spring 17 close contacts; The other end of described precompression bar 16 provides through hole on mechanism shell 15 bottom surfaces to stretch out precompression by precompression mechanism shell 15 is provided, the other end of described precompression 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 engagement in the main body of described gear 11 and precompression bar 16; Precompression provides mechanism's enclosing cover 6 to provide mechanism shell 15 sealings precompression;
The bottom of precompression bar 16 is provided with pressure transducer 8, and the signal output part of described pressure transducer 8 is connected with the signal input part of A/D converter; 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.
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, and it is realized by following steps:
Step 1, adopt decelerating step motor to control worm screw rotation, precompression bar is risen to blade emplacing platform at a distance of 0.8 to 1.2cm position;
Step 2, plant leaf blade to be measured is put on blade emplacing platform, and displacement sensor probe is contacted to plant leaf blade lower surface;
Step 3, to the pressure transducer 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 value arrives 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 guaranteeing that plant leaf blade is harmless, thereby obtains the morphological change of plant growth in the cycle.Measuring accuracy on year-on-year basis prior art has improved 20%.
Accompanying drawing explanation
Fig. 1 is Split type structure schematic diagram of the present invention; Fig. 2 is the structural representation after the present invention assembles.
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2, this embodiment is described, a plant leaf blade thickness nondestructive measurement instrument for power, it comprises that blade emplacing platform 1, pick-up unit support 2, inductive displacement transducer 3, decelerating step motor 4, Quincunx elastic coupler 5, precompression provide mechanism's enclosing cover 6, pressure transducer 8, worm shaft 9, bearing 10, gear 11, gear shaft 12, No. two bearings 13, worm gear 14, precompressions that mechanism shell 15, precompression bar 16, spring 17, A/D converter, single-chip microcomputer and host computer are provided;
The front end one of pick-up unit 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 pick-up unit support 2 inside, and the probe of inductive displacement transducer 3 stretches out pick-up unit support 2, and is positioned at the open area of blade emplacing platform 1; The stator of decelerating step motor 4 is fixed in the main body of inductive displacement transducer 3, and precompression provides side correspondence relative on mechanism shell 15 to have two through holes, and described No. two bearings 13 are fixed therein in a through hole; The output shaft of described decelerating step motor 4 extend into precompression through another through hole provides mechanism shell 15 inside, and the output shaft of decelerating step motor 4 is connected with one end of worm shaft 9 by Quincunx elastic coupler 5; 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 meshes with worm shaft 9; The center of worm gear 14 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, at precompression, provide position corresponding with this through hole on the end face of mechanism shell 15 inside to be fixed with spring position-limiting tube, spring 17 is arranged in this spring position-limiting tube, the top of precompression bar 16 stretch in spring position-limiting tube and with spring 17 close contacts; The other end of described precompression bar 16 provides through hole on mechanism shell 15 bottom surfaces to stretch out precompression by precompression mechanism shell 15 is provided, the other end of described precompression 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 engagement in the main body of described gear 11 and precompression bar 16; Precompression provides mechanism's enclosing cover 6 to provide mechanism shell 15 sealings precompression;
The bottom of precompression bar 16 is provided with pressure transducer 8, and the signal output part of described pressure transducer 8 is connected with the signal input part of A/D converter; 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.
Principle of work: the present invention has designed the contact vane thickness measuring instrument under a kind of adjusting prepressing power based on inductance principle.In this device, design a kind of catanator that carries out trace adjusting and controlled the movement of precompression bar, on precompression bar, pressure transducer 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, along with probe is mobile, cause that 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.
In the present invention, inductive displacement transducer 3 is installed in pick-up unit support 2; Precompression bar 16 is installed on precompression and provides in mechanism by spring 17 and eliminate its assemblage gaps, and precompression bar is stabilized in mechanism under the effect of spring force; On precompression bar, tooth bar is installed, itself and pinion wheel 11 are meshed; Pinion wheel 11 and worm gear 14 connect through gear shaft 12, and link; Pressure transducer 8 is installed on the end of precompression bar 16; Thereby decelerator 4 is connected and is controlled its rotation and control the lifting that whole precompression provides mechanism by shaft coupling 5 and worm screw 9.
Because worm gear diameter is greater than pinion wheel diameter and for certain ratio, and pinion wheel and worm gear are coaxial linkage mechanism; When 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 mesh by tooth bar and pinion wheel, thereby lifting is carried out in realization under the drive of pinion wheel, so when Motor Control worm and gear moves, precompression bar only can carry out the movement of small distance under the drive of pinion wheel, thereby the trace of realizing precompression bar regulates.
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 state of power, thereby make measuring instrument in the situation that of this approximate ideal, carry out the nondestructive measurement of vane thickness.
The difference of the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power described in embodiment two, this embodiment and embodiment one is, it also comprises fastening bolt 7, and described precompression provides mechanism's enclosing cover 6 to provide mechanism shell 15 sealings precompression by fastening bolt 7.
The difference of the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power described in embodiment three, this embodiment and embodiment one or two is, decelerating step motor 4 is PG28 planetary reduction gear stepper motors.
The difference of the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power described in embodiment four, this embodiment and embodiment three is, the diameter of worm gear 14 is four times of gear 11 diameters.
The plant leaf blade thickness nondestructive measurement instrument of embodiment five, a kind of adjusting prepressing power based on described in embodiment one is measured the method for plant leaf blade thickness, and it is realized by following steps:
Step 1, adopt decelerating step motor to control worm screw rotation, precompression bar is risen to blade emplacing platform at a distance of 0.8 to 1.2cm position;
Step 2, plant leaf blade to be measured is put on blade emplacing platform, and displacement sensor probe is contacted to plant leaf blade lower surface;
Step 3, to the pressure transducer 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 value arrives 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.
Embodiment six, the difference of measuring the method for plant leaf blade thickness according to the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power described in embodiment five be, in step 1, the distance of precompression bar and blade emplacing platform is 1.0cm.

Claims (6)

1. the plant leaf blade thickness nondestructive measurement instrument of an adjusting prepressing power, it is characterized in that: it comprises blade emplacing platform (1), pick-up unit support (2), inductive displacement transducer (3), decelerating step motor (4), Quincunx elastic coupler (5), precompression provides mechanism's enclosing cover (6), pressure transducer (8), worm shaft (9), a bearing (10), gear (11), gear shaft (12), No. two bearings (13), worm gear (14), precompression provides mechanism shell (15), precompression bar (16), spring (17), A/D converter, single-chip microcomputer and host computer,
The front end one of pick-up unit 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 pick-up unit support (2) inside, and the probe of inductive displacement transducer (3) stretches out pick-up unit support (2), and is positioned at the open area of blade emplacing platform (1); The stator of decelerating step motor (4) is fixed in the main body of inductive displacement transducer (3), and precompression provides the upper relative side correspondence of mechanism shell (15) to have two through holes, and described No. two bearings (13) are fixed therein in a through hole; The output shaft of described decelerating step motor (4) extend into precompression through another through hole mechanism shell (15) inside is provided, and the output shaft of decelerating step motor (4) is connected with one end of worm shaft (9) by Quincunx elastic coupler (5); The other end of described worm shaft (9) is connected with No. two bearings (13) bearing;
Precompression provides in mechanism shell (15) worm gear (14) is installed, and described worm gear (14) meshes with worm shaft (9); The center of worm gear (14) is fixedly connected with one end of gear shaft (12); The other end of described gear shaft (12) and a bearing (10) bearing fit;
Precompression provides on the bottom surface of mechanism shell (15) and has through hole, at precompression, provide the position corresponding with this through hole on the inner end face of mechanism shell (15) to be fixed with spring position-limiting tube, spring (17) is arranged in this spring position-limiting tube, the top of precompression bar (16) stretch in spring position-limiting tube and with spring (17) close contact; The other end of described precompression bar (16) provides through hole on mechanism shell (15) bottom surface to stretch out precompression by precompression mechanism shell (15) is provided, the other end of described precompression 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 engagement in the main body of described gear (11) and precompression bar (16); Precompression provides mechanism's enclosing cover (6) to provide mechanism shell (15) sealing by precompression;
The bottom of precompression bar (16) is provided with pressure transducer (8), and the signal output part of described pressure transducer (8) is connected with the signal input part of A/D converter; 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, it is characterized in that it also comprises fastening bolt (7), described precompression provides mechanism's enclosing cover (6) by precompression, to provide mechanism shell (15) sealing by fastening bolt (7).
3. the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power according to claim 1, is characterized in that decelerating step 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, the diameter that it is characterized in that worm gear (14) is four times of gear (11) diameter.
5. the plant leaf blade thickness nondestructive measurement instrument based on a kind of adjusting prepressing power claimed in claim 1 is measured the method for plant leaf blade thickness, it is characterized in that: it is realized by following steps:
Step 1, adopt decelerating step motor to control worm screw rotation, precompression bar is risen to blade emplacing platform at a distance of 0.8 to 1.2cm position;
Step 2, plant leaf blade to be measured is put on blade emplacing platform, and displacement sensor probe is contacted to plant leaf blade lower surface;
Step 3, to the pressure transducer 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 value arrives 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.
6. the plant leaf blade thickness nondestructive measurement instrument of a kind of adjusting prepressing power according to claim 5 is measured the method for plant leaf blade thickness, it is characterized in that in step 1, the distance of precompression bar and blade emplacing platform is 1.0cm.
CN201310585090.0A 2013-11-19 2013-11-19 A kind of plant leaf blade thickness nondestructive measurement instrument and measuring method of adjusting prepressing power Expired - Fee Related CN103575203B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN108375606A (en) * 2018-01-10 2018-08-07 江苏大学 A kind of plant leaf blade moisture percentage measuring apparatus and method
CN108534693A (en) * 2018-06-28 2018-09-14 四川农业大学 One plant tea holds together depth height measuring device
CN117949201A (en) * 2024-03-25 2024-04-30 苏州工业园区耐斯达自动化技术有限公司 Pre-pressure testing machine and testing method thereof

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TWI636233B (en) * 2014-12-12 2018-09-21 美商通用電機股份有限公司 Method and apparatus for measuring thickness of an object

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108375606A (en) * 2018-01-10 2018-08-07 江苏大学 A kind of plant leaf blade moisture percentage measuring apparatus and method
CN108534693A (en) * 2018-06-28 2018-09-14 四川农业大学 One plant tea holds together depth height measuring device
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CN117949201A (en) * 2024-03-25 2024-04-30 苏州工业园区耐斯达自动化技术有限公司 Pre-pressure testing machine and testing method thereof

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