CN107741441A - A kind of compound sensor for being used to measure ensilage parameter - Google Patents
A kind of compound sensor for being used to measure ensilage parameter Download PDFInfo
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- CN107741441A CN107741441A CN201710862143.7A CN201710862143A CN107741441A CN 107741441 A CN107741441 A CN 107741441A CN 201710862143 A CN201710862143 A CN 201710862143A CN 107741441 A CN107741441 A CN 107741441A
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- hollow metal
- metal rod
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- 150000001875 compounds Chemical class 0.000 title claims abstract 7
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000003750 conditioning effect Effects 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims description 103
- 239000002184 metal Substances 0.000 claims description 103
- 239000004460 silage Substances 0.000 claims description 37
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910052697 platinum Inorganic materials 0.000 claims description 15
- 230000006698 induction Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910001120 nichrome Inorganic materials 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 241001149930 Protura <class> Species 0.000 abstract 3
- 238000012856 packing Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 7
- 239000010902 straw Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/028—Circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/045—Circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention provides a kind of compound sensor for being used to measure ensilage parameter, and the first end of hollow metallic rod is connected with conehead, and the second end of hollow metallic rod is connected with support bar；First dead ring is enclosed in hollow metallic rod；Becket and the second dead ring are enclosed on the first dead ring, and the second dead ring is among conehead and becket；The moisture electrode signal that deformation electric signal, conehead and becket that sensing element exports export is converted to normal voltage and is output to external measuring circuitry by signal conditioning unit, completes the degree of packing of ensilage and the measurement of moisture content.Compound sensor provided by the present invention for measuring ensilage parameter, realizes the degree of packing and moisture content synchronous real-time measurement.
Description
Technical Field
The invention relates to the technical field of agricultural engineering measurement, in particular to a composite sensor for measuring silage parameters.
Background
Ensiling, a method for storing green fodder, is to treat green fodder or straws, pack and package the treated green fodder or straws, and ferment the treated green fodder or straws with lactic acid bacteria under the condition of isolating the treated green fodder or straws from air to generate organic acid, so as to prepare the fodder capable of being stored for a long time. Tests show that the compactness and the water content are important factors influencing the quality of the silage.
In recent years, cone index meters have been used in the field of silage compactness measurement. The silage cone index is defined as the pressure that the base area of the cone per unit bears during penetration of the cone into the silage. The cone index of silage can really represent the penetration resistance, namely the compactness of the silage. The cone index meter is widely used due to the simple use method and accurate measurement. The method for measuring the water content based on the dielectric property can accurately measure the water content of the silage under the condition that the interior of the silage is not damaged.
Because the compactness and the water content are important factors influencing the quality of the silage, and the two parameters have mutual influence, in order to accurately describe the quality characteristics of the silage, the compactness and the water content of the silage should be obtained at the same time. The method can only realize the measurement of single parameter, and the measurement of the compactness and the water content of the silage needs to be independently completed. This not only makes the measurement process loaded down with trivial details, and the disturbance of the measurement of former physical quantity to silage can influence the measurement accuracy of another physical quantity moreover, can not reflect the quality characteristics of silage comprehensively, effectively.
Disclosure of Invention
To at least partially overcome the above-mentioned problems in the prior art, the present invention provides a composite sensor for measuring silage parameters.
The invention provides a composite sensor for measuring silage parameters, comprising: the device comprises a probe, a support rod and a signal adjusting unit; the probe comprises a hollow metal rod, a first insulating ring, a second insulating ring, a metal ring, a conical head and an induction element; the first end of the hollow metal rod is connected with the conical head, and the second end of the hollow metal rod is connected with the supporting rod; the first insulating ring is sleeved on the hollow metal rod; the metal ring and the second insulating ring are sleeved on the first insulating ring, and the second insulating ring is arranged between the conical head and the metal ring; and the signal adjusting unit is used for converting the deformation electric signal output by the sensing element and the moisture electrode signal output by the conical head and the metal ring into standard voltage and outputting the standard voltage to an external measuring circuit to finish the measurement of the compactness and the moisture content of the silage.
Wherein the hollow metal rod comprises a first hollow metal rod having a first outer diameter and a second hollow metal rod having a second outer diameter; wherein the first outer diameter is greater than the second outer diameter; the sensing element is disposed at a middle position of an outer surface of the second hollow metal rod.
Wherein the first insulating ring comprises a third insulating ring having a third outer diameter and a fourth insulating ring having a fourth outer diameter; wherein the third outer diameter is less than the fourth outer diameter; the metal ring and the second insulating ring are sleeved on the third insulating ring.
Wherein the supporting rod is a hollow round rod; the conical head is connected with the first end of the hollow metal rod through threads; the support rod is connected with the second end of the hollow metal rod through threads.
Wherein, the material of the cone head is nickel-chromium alloy; the cone angle of the cone head is 30 degrees, and the diameter of the cone head is 12.83 mm.
The induction element is a platinum resistance strain gauge; the platinum resistance strain gauge is adhered to the middle position of the outer surface of the second hollow metal rod to form a bridge circuit.
The hollow metal rod is provided with a first wire outlet hole and a second wire outlet hole; wherein the first wire outlet hole is on the first hollow metal rod; the second wire outlet hole is formed in the second hollow metal rod.
And a third wire outlet hole is formed in the third insulating ring.
Wherein, still include: a wire; wherein the wire connects the cone head, the metal ring, and the inductive element with the signal conditioning unit.
Wherein the signal conditioning unit includes: a high-frequency oscillator, a detector circuit, and an operational amplifier; wherein,
the high-frequency oscillator is used for converting the water electrode signal into a high-frequency signal;
the detection circuit is used for filtering the high-frequency signal to obtain a first signal and filtering the electric signal output by the induction element to obtain a second signal;
the operational amplifier is used for converting the first signal and the second signal into a first standard voltage and a second standard voltage respectively.
In summary, the composite sensor for measuring the parameters of the silage provided by the invention has the advantages that the first end of the hollow metal rod is connected with the conical head, and the second end of the hollow metal rod is connected with the supporting rod; the first insulating ring is sleeved on the hollow metal rod; the metal ring and the second insulating ring are sleeved on the first insulating ring, and the second insulating ring is arranged between the conical head and the metal ring; the signal conditioning unit converts the deformation electric signal output by the sensing element, the water electrode signal output by the conical head and the metal ring into standard voltage and outputs the standard voltage to an external measuring circuit, so that the compactness and the water content of the silage are measured. The composite sensor for measuring the parameters of the silage realizes synchronous real-time measurement of compactness and water content.
Drawings
FIG. 1 is a schematic diagram of a composite sensor for measuring silage parameters according to an embodiment of the invention;
FIG. 2 is a schematic exploded view of a probe portion of a composite sensor for measuring silage parameters according to an embodiment of the invention;
FIG. 3 is a schematic illustration of a cross-sectional view of the position of a platinum resistance strain gage of a composite sensor for measuring silage parameters in accordance with an embodiment of the invention;
FIG. 4 is a circuit diagram of a platinum resistance strain gage of a composite sensor for measuring silage parameters according to an embodiment of the invention;
fig. 5 is a flow chart of the operation of a signal conditioning unit of a combi sensor for measuring silage parameters according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment of the present invention, referring to fig. 1 and 2, a composite sensor for measuring silage parameters, comprising: the device comprises a probe 1, a support rod 2 and a signal adjusting unit; wherein,
the probe 1 comprises a hollow metal rod 3, a first insulating ring 4, a second insulating ring 6, a metal ring 5, a conical head 7 and an induction element 9;
the first end of the hollow metal rod 3 is connected with the conical head 7, and the second end of the hollow metal rod 3 is connected with the supporting rod 2;
the first insulating ring 4 is sleeved on the hollow metal rod 3;
the metal ring 5 and the second insulating ring 6 are sleeved on the first insulating ring 4, and the second insulating ring 6 is arranged between the conical head 7 and the metal ring 5;
and the signal adjusting unit is used for converting the deformation electric signal output by the sensing element 9 and the moisture electrode signal output by the conical head 7 and the metal ring 5 into standard voltage and outputting the standard voltage to an external measuring circuit.
The first insulating ring 4 and the second insulating ring 6 are made of PVC.
Specifically, the second insulating ring 6 is arranged between the conical head 7 and the metal ring 5, and the conical head 7 and the metal ring 5 are respectively used as two water electrodes of a measuring sensor to measure the water content; the sensing element 9 measures the degree of compactness by converting the deformation generated at the second end of the hollow metal rod 3 into a deformation electric signal.
The embodiment provides a composite sensor for measuring silage parameters, wherein a first end of a hollow metal rod is connected with a conical head, and a second end of the hollow metal rod is connected with a supporting rod; the first insulating ring is sleeved on the hollow metal rod; the metal ring and the second insulating ring are sleeved on the first insulating ring, and the second insulating ring is arranged between the conical head and the metal ring; the signal conditioning unit converts the deformation electric signal output by the sensing element, the water electrode signal output by the conical head and the metal ring into standard voltage and outputs the standard voltage to an external measuring circuit, so that the compactness and the water content of the silage are measured. The utility model provides a composite sensor for measuring silage parameter, realized compactness and moisture content synchronous real-time measurement.
In another embodiment of the present invention, on the basis of the above-described embodiment, the hollow metal rod 3 includes a first hollow metal rod having a first outer diameter and a second hollow metal rod having a second outer diameter; wherein,
the first outer diameter is greater than the second outer diameter;
the inductive element 9 is arranged in the middle of the outer surface of the hollow metal rod of the second outer diameter.
Wherein, the second hollow metal rod is used as a stressed elastic body.
The first end of the first hollow metal rod is connected with the conical head 7, and the second end of the first hollow metal rod is connected with the first end of the second hollow metal rod; the second end of the second hollow metal rod is connected with the support rod 2.
Wherein, the first hollow metal rod and the second hollow metal rod are integrally formed to form the hollow metal rod 3.
Specifically, the sensing element 9 is arranged at the middle position of the outer surface of the second hollow metal rod, the deformation of the elastic body causes the change of the electric signal, and the sensing element 9 transmits the measured electric signal to the signal conditioning unit and outputs the measured electric signal to the external measuring circuit through the signal conditioning unit.
In another embodiment of the present invention, on the basis of the above embodiment, the first insulating ring 4 includes a third insulating ring having a third outer diameter and a fourth insulating ring having a fourth outer diameter; wherein,
the third outer diameter is less than the fourth outer diameter;
the metal ring 5 and the second insulating collar 6 are on the third insulating ring.
Wherein, the third insulating ring and the fourth insulating ring are integrally formed to form the first insulating ring 4.
Preferably, the fourth insulating ring and the second hollow metal rod are arranged correspondingly and are arranged in a superposition way; the third insulating ring and the first hollow metal rod are arranged correspondingly and are arranged in a superposition mode.
In a further embodiment of the present invention, on the basis of the above embodiment, the support rod 2 is a hollow round rod;
the conical head 7 is connected with the first end of the hollow metal rod 3 through threads;
the support rod 2 is connected with the second end of the hollow metal rod 3 through threads.
Specifically, the support rod 2 is a hollow round rod and is detachably connected with the hollow metal rod 3; the hollow metal rod 3 is detachably connected with the conical head 7.
In another embodiment of the present invention, on the basis of the above embodiment, the material of the conical head is nichrome; the cone angle of the cone head is 30 degrees, and the diameter of the cone head is 12.83 mm.
In a further embodiment of the present invention, on the basis of the above embodiment, with reference to fig. 3 and 4, the sensing element 9 is a platinum resistance strain gauge;
and the platinum resistance strain gauge is adhered to the outer surface of the second hollow metal rod to form a bridge circuit.
Specifically, the sensing element 9 selects a platinum resistance strain gauge, four platinum resistance strain gauges are uniformly adhered around the second hollow metal rod, and the positions of the platinum resistance strain gauges are distributed as shown in fig. 3. The strain gauges are connected by wires to form a bridge circuit, as shown in fig. 4. The 4 arms of the bridge are respectively composed of a platinum resistance strain gauge, when the elastic body deforms, the resistance of the bridge arm changes, and the voltage U output by the bridge changes accordinglyoutComputing deviceThe formula is as follows:
in another embodiment of the present invention, on the basis of the above embodiment, the hollow metal rod 3 is provided with a first and a second outlet holes; wherein,
the first outlet hole 10 is formed in the first hollow metal rod;
the second outlet hole 8 is formed in the second hollow metal rod.
Specifically, the first outlet hole 10 is on the first hollow metal rod; the second outlet hole 8 is in the second hollow metal rod.
In another embodiment of the present invention, on the basis of the above embodiment, a third wire outlet 11 is provided on the third insulating ring.
Specifically, the third insulating ring is provided with a third wire outlet hole 11, and when the first insulating ring 4 is sleeved on the hollow metal rod 3, the third wire outlet hole 11 is overlapped with the first wire outlet hole 10.
In another embodiment of the present invention, on the basis of the above embodiment, the method further includes: a lead wire 12; wherein,
the lead 12 connects the conical head 7, the metal ring 5 and the inductive element 9 with the signal conditioning unit.
Specifically, the lead 12 connected with the metal ring 5 enters the hollow metal rod 3 through the third wire outlet hole 11 and the first wire outlet hole 10; the lead 12 connected with the induction element 9 enters the hollow metal rod 3 through the second wire outlet hole 8; the lead wire 12 is introduced into the interior of the support rod 2 through the hollow metal rod 3 and then connected to the signal conditioning unit.
In still another embodiment of the present invention, on the basis of the above-described embodiment, with reference to fig. 5, the signal conditioning unit includes: a high-frequency oscillator, a detector circuit, and an operational amplifier; wherein,
the high-frequency oscillator is used for converting the water electrode signal into a high-frequency signal;
the detection circuit is used for filtering the high-frequency signal to obtain a first signal and filtering the electric signal output by the induction element to obtain a second signal;
the operational amplifier is used for converting the first signal and the second signal into a first standard voltage and a second standard voltage respectively.
Specifically, as shown in fig. 5, the signal conditioning unit 13 has a working flow, wherein the high-frequency oscillator converts the moisture electrode signal into a high-frequency signal, the detection circuit filters the high-frequency signal to obtain a first signal, and the operational amplifier converts the first signal into a first standard voltage; the detection circuit filters the voltage signal output by the bridge to obtain a second signal, and the operational amplifier converts the second signal into a second standard voltage.
In another embodiment of the invention, on the basis of the above embodiment, during the measurement process, the composite sensor is inserted into silage, the conical head 7 is subjected to the resistance of the silage, the elastic body in the hollow metal rod 3 is deformed, the resistance of the platinum resistance strain gauge arranged on the elastic body is changed, the deformation is converted into an electric signal through the resistance strain gauge, the electric signal is transmitted to the signal conditioning unit through a lead, and the electric signal is filtered through the detection circuit and is converted into a standard voltage through the operational amplifier to be output to the external measurement circuit. Meanwhile, when the moisture of silage around the two electrodes of the conical head 7 and the metal ring 5 is changed, the characteristic impedance between the two electrodes is changed, the characteristic impedance value is transmitted to the signal adjusting unit through a lead, the high-frequency signal is converted into a high-frequency signal through the high-frequency oscillator, the high-frequency signal is filtered through the detection circuit, and the high-frequency signal is converted into standard voltage through the operational amplifier and is output to an external measuring circuit.
The present embodiment provides a composite sensor for measuring silage parameters, a platinum resistance strain gauge disposed on an outer surface of a second end of a hollow metal rod; the first insulating ring is sleeved on the hollow metal rod; the metal ring and the second insulating ring are sleeved on the first insulating ring, and the second insulating ring is arranged between the conical head and the metal ring; the signal conditioning unit converts the electric signal output by the platinum resistance strain gauge and the water electrode signal output by the cone head and the metal ring into standard voltage and outputs the standard voltage to an external measuring circuit, thereby realizing synchronous real-time measurement of compactness and water content.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A compound sensor for measuring silage parameters, comprising: the device comprises a probe, a support rod and a signal adjusting unit; wherein,
the probe comprises a hollow metal rod, a first insulating ring, a second insulating ring, a metal ring, a conical head and an induction element;
the first end of the hollow metal rod is connected with the conical head, and the second end of the hollow metal rod is connected with the supporting rod;
the first insulating ring is sleeved on the hollow metal rod;
the metal ring and the second insulating ring are sleeved on the first insulating ring, and the second insulating ring is arranged between the conical head and the metal ring;
and the signal adjusting unit is used for converting the deformation electric signal output by the sensing element and the moisture electrode signal output by the conical head and the metal ring into standard voltage and outputting the standard voltage to an external measuring circuit to finish the measurement of the compactness and the moisture content of the silage.
2. The composite sensor of claim 1, wherein the hollow metal rod comprises a first hollow metal rod having a first outer diameter and a second hollow metal rod having a second outer diameter; wherein,
the first outer diameter is greater than the second outer diameter;
the sensing element is disposed at a middle position of an outer surface of the second hollow metal rod.
3. The compound sensor of claim 1, wherein the first insulating ring comprises a third insulating ring having a third outer diameter and a fourth insulating ring having a fourth outer diameter; wherein,
the third outer diameter is less than the fourth outer diameter;
the metal ring and the second insulating ring are sleeved on the third insulating ring.
4. The composite sensor of claim 1, wherein the support rod is a hollow round rod;
the conical head is connected with the first end of the hollow metal rod through threads;
the support rod is connected with the second end of the hollow metal rod through threads.
5. The compound sensor of claim 1, wherein the material of the cone head is nichrome;
the cone angle of the cone head is 30 degrees, and the diameter of the cone head is 12.83 mm.
6. The composite sensor of claim 1, wherein the sensing element is a platinum resistance strain gage;
the platinum resistance strain gauge is adhered to the middle position of the outer surface of the second hollow metal rod to form a bridge circuit.
7. The composite sensor of claim 2, wherein the hollow metal rod is provided with first and second wire outlets; wherein,
the first wire outlet hole is formed in the first hollow metal rod;
the second wire outlet hole is formed in the second hollow metal rod.
8. The composite sensor of claim 3, wherein the third insulating ring has a third wire hole.
9. The composite sensor of claim 1, further comprising: a wire; wherein,
the wire connects the cone head, the metal ring and the inductive element with the signal conditioning unit.
10. The compound sensor of claim 1, wherein the signal conditioning unit comprises: a high-frequency oscillator, a detector circuit, and an operational amplifier; wherein,
the high-frequency oscillator is used for converting the water electrode signal into a high-frequency signal;
the detection circuit is used for filtering the high-frequency signal to obtain a first signal and filtering the electric signal output by the induction element to obtain a second signal;
the operational amplifier is used for converting the first signal and the second signal into a first standard voltage and a second standard voltage respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710862143.7A CN107741441B (en) | 2017-09-21 | 2017-09-21 | composite sensor for measuring silage parameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710862143.7A CN107741441B (en) | 2017-09-21 | 2017-09-21 | composite sensor for measuring silage parameters |
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| CN107741441A true CN107741441A (en) | 2018-02-27 |
| CN107741441B CN107741441B (en) | 2020-01-31 |
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2017
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