CN106595917A - Large-force-value digital force sensor - Google Patents
Large-force-value digital force sensor Download PDFInfo
- Publication number
- CN106595917A CN106595917A CN201710062378.8A CN201710062378A CN106595917A CN 106595917 A CN106595917 A CN 106595917A CN 201710062378 A CN201710062378 A CN 201710062378A CN 106595917 A CN106595917 A CN 106595917A
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- Prior art keywords
- elastomer
- sheath
- bedplate
- rosette
- force value
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
The invention relates to a large-force-value digital force sensor comprising a sheath, an elastomer arranged inside the sheath vertically, a base plate I welded to the opening of the lower end of the sheath in a sealing mode, a junction box I and a junction box I fixed at the two sides of the sheath respectively, a battery box arranged in the junction box I, and a circuit board being arranged in the junction box II and being provided with a Wheatstone bridge. The sheath having a cylindrical structure has an open upper end and an open lower end. With the stress of a long hole, stress distribution of the traditional column type elastomer is changed and thus the axial and horizontal transformation becomes consistent, so that an objective of non-linear error elimination can be achieved and thus force measurement of the large force value of over 500t can be realized. The digital force sensor has the excellent sealing performance, so that the waterproof and anti-corrosion effects can be improved effectively. With a temperature-sensing resistor, high-temperature and low-temperature circulating and program controlling are carried out and specific numerical values of zero-point and temperature zero-point compensation of a strain gauge can be detected and determined, so that high-precision control of the temperature performance of the strain gauge can be realized.
Description
Technical field
The present invention relates to a kind of digital force transducer of great force value.
Background technology
At present, traditional column type sensor, strain gauge is pasted onto on pole structure elastomer outer wall, due to its own measurement
The output of transducer sensitivity that the defect of structural principle makes and axial strain not direct proportionality, thus brings the non-of sensor
Linearity error.Need to compensate this non-linear with semiconductor gauge in manufacturing process, while also need to make supporting diaphragm, make
Sphere is made at sensor two ends, and face contact is changed to into a contact, could only in this way meet technical requirement.This is for 500t
For above great force value sensor, in addition to the complexity of production technology, the easy unstability of said structure does not apply to the carrying of great force value
Power is measured.Meanwhile, traditional wide range simulation column type sensor signal transmission distance is short, only tens meters.
The content of the invention
The present invention is in order to overcome the shortcomings of above technology, there is provided a kind of great force value number that can be measured with distant-range high-precision
Word formula force transducer.
The present invention overcomes the technical scheme that its technical problem is adopted to be：
A kind of digital force transducer of great force value, including：In tube structure and the sheath of upper and lower end opening, it is vertically positioned in sheath
Bedplate I at sheath lower ending opening of elastomer, sealing welding, be individually fixed in sheath both sides rosette I and wiring
Box II, the battery case being arranged in rosette I and the circuit board for being provided with Wheatstone bridge being arranged in rosette II, it is described
Elastomer top is positioned at the outside of sheath upper end open and it is into ball head structure, and the lower end of elastomer is by threaded fastener and bottom
Seat board I is connected, and is tightly connected by sealing device at the elastomer and the upper end open of sheath, the elastomer in sheath
It is above axially disposed to have elongated hole, strain gauge and quasiconductor compensating plate）In being arranged at elongated hole, pacify on the elastomer in sheath
Described equipped with warming resistor, strain gauge, quasiconductor compensating plate, warming resistor and battery case are all connected to circuit board, institute
State and cover plate I is fixed with the outer end opening of rosette I, cover plate II is fixed with the outer end opening of the rosette II.
The diaphragm and film ring of above-mentioned sealing device including annular, his elastomer is plugged in the endoporus of film ring and mutually
Sealing welding is fixed, and the film ring is plugged in the endoporus of diaphragm and seals against each other and is welded and fixed, the outer ring inserting of the film ring
At the upper end open of sheath, and seal against each other and be welded and fixed.
In order to play overload protective function, also including the bedplate II being arranged between elastomer and bedplate I, the bottom
The lower surface of seat board II contacts with the upper surface of bedplate I, the upper surface of the bedplate II and the lower surface phase of elastomer
Contact, the comprcssive strength of the bedplate II is less than the comprcssive strength of bedplate I.
In order to improve connecting portion, rosette I and the lid of sealing, above-mentioned rosette I and sheath, rosette II and sheath
The connecting portion and rosette II of plate I are respectively arranged with sealant layer with the connecting portion of cover plate II.
In order to improve sealing, rubberised layer is provided with above-mentioned elongated hole, the rubberised layer mends strain gauge and quasiconductor
Repay piece to be sealed in elongated hole.
In order to realize being wirelessly transferred for signal, also including the wireless transmitter module being fixed on the outside of sheath, described wireless
Penetrate module and be connected to circuit board.
In order to improve sealing, between above-mentioned bedplate II and elastomer and jacket inner wall rubberised layer is provided with.
Above-mentioned elastomer is made using following steps：
A) elastomer is Jing after lathe turning molding, into sodium hydroxide, sodium carbonate, tertiary sodium phosphate and water according to 1:2:0.3:5
Soak 20-30 minutes in the alkaline solution that ratio is made into；
B) elastomer Jing after alkaline solution immersion is put in the sulfuric acid solution that concentration is 70%-85% and soaks 5-8 minutes；
C) sandblasting is carried out to the outer surface of elastomer using sandblasting machine, the outer surface of elastomer forms some 15-20 μm of depression
Groove；
D) mixed liquor of 40CrNiMoA material powders and silica gel is filled into recessed groove；
E) outer elastomeric surface is electroplated the metal level to form that material is 40CrNiMoA；
F) elastomer is heated to into 1200 DEG C, and is incubated 2-3 minutes；
G) elastomer after heating is cooled to into natural temperature.
The invention has the beneficial effects as follows：Change the stress distribution of traditional column type elastomer using the stress concentration of elongated hole, make
Its deformation axially and also laterally is consistent, and so as to reach the purpose for improving nonlinearity erron, the deformation values of strain gauge measurement are by electricity
Wheatstone bridge on the plate of road, finally realizes the measurement of the power of more than 500t great force values.Because battery case closing is arranged at wiring
In box I, circuit board closing is arranged in rosette II his elastomer lower end and the sealing welding of bedplate I, leads at its upper end open
Cross sealing device to be connected with elastomeric seal, so as to the favorable sealing property of the digital force transducer of whole great force value, effectively carry
The high effect of waterproof anti-corrosion.Warming resistor detects and determines strain by carrying out high/low temperature circulation and programme-control
Meter needs to carry out the concrete numerical value of zero point and temperature zero compensation, it is achieved thereby that the high accuracy control of the temperature performance of strain gauge
System.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure, the 1. cover plate I 8. of 2. elastomer of sheath, 3. elongated hole, 4. strain gauge, 5. quasiconductor compensating plate, 6. rosette I 7.
The bedplate of 14. film ring of battery case 9. rosette, II 10. cover plate, II 11. circuit board, 12. warming resistor, 13. diaphragm 15.
The rubberised layer of I 16. bedplate II 17..
Specific embodiment
Below in conjunction with the accompanying drawings 1 the present invention will be further described.
A kind of digital force transducer of great force value, including：In tube structure and the sheath 1 of upper and lower end opening, it is vertically positioned at
Bedplate I 15 of the elastomer 2, sealing welding in sheath 1 at the lower ending opening of sheath 1, it is individually fixed in the both sides of sheath 1
Rosette I 6 and rosette II 9, the battery case 8 being arranged in rosette I 6 and it is arranged at being provided with rosette II 9
The circuit board 11 of Wheatstone bridge, the top of elastomer 2 is positioned at the outside of the upper end open of sheath 1 and it is into ball head structure, elastomer 2
Lower end be connected with bedplate I 15 by threaded fastener, it is close by sealing device at elastomer 2 and the upper end open of sheath 1
Envelope connection, axially disposed on the elastomer 2 in sheath 1 to have elongated hole 3, strain gauge 4 and quasiconductor compensating plate 5 are arranged at
In elongated hole 3, warming resistor 12, strain gauge 4, quasiconductor compensating plate 5, warming electricity are installed on the elastomer 2 in sheath 1
Resistance device 12 and battery case 6 are all connected to circuit board 11, and cover plate I 7, rosette II 9 are fixed with the outer end opening of rosette I 6
Outer end opening at be fixed with cover plate II 10.Because strain gauge 4 and quasiconductor compensating plate 5 are arranged in elongated hole 3, therefore work as
When elastomer 2 is under pressure, using the stress concentration of elongated hole 3 stress distribution of traditional column type elastomer is changed so as to axially and
Laterally flexible consistent, so as to reach the purpose for improving nonlinearity erron, the deformation values of the measurement of strain gauge 4 are by circuit board 11
Wheatstone bridge, finally realize the measurement of the power of more than 500t great force values.Because the closing of battery case 8 is arranged at rosette I 6
In, the closing of circuit board 11 is arranged in rosette II 9 his lower end of elastomer 2 and the sealing welding of bedplate I 15, its upper end open
Place is tightly connected by sealing device with elastomer 2, so as to the favorable sealing property of the digital force transducer of whole great force value, is had
Effect improves the effect of waterproof anti-corrosion.Warming resistor 12 is detected and determined by carrying out high/low temperature circulation and programme-control
Going out strain gauge needs to carry out the concrete numerical value of zero point and temperature zero compensation, it is achieved thereby that the temperature performance of strain gauge is high-precision
Degree control.
Sealing device can be following structure, and it includes the diaphragm 13 and film ring 14 of annular, and he is plugged in film by elastomer 2
The endoporus of ring 14 and sealing against each other is welded and fixed, and film ring 14 is plugged in the endoporus of diaphragm 13 and seals against each other and is welded and fixed, film
The outer ring of ring 14 is plugged at the upper end open of sheath 1, and is sealed against each other and be welded and fixed.Elastomer 11 can first preheat after with it is outer
The less film ring 14 in footpath is welded, caudacoria ring 14 weld with the diaphragm 13 being welded and fixed on sheath 1 again, so as to have
Effect prevents the generation of welding deformation, improves welding quality and the sealing after welding.
Further, also including the bedplate II 16 being arranged between elastomer 2 and bedplate I 15, bedplate II 16
Lower surface contact with the upper surface of bedplate I 15, the upper surface of bedplate II 16 connects with the lower surface of elastomer 2
Touch, the comprcssive strength of bedplate II 16 is less than the comprcssive strength of bedplate I 15.Therefore the digital force transducer of this great force value is worked as
Operationally if subjected to pressure value when transfiniting, bedplate II 16 can first crushing, so as to effectively prevent bedplate I 1 with
The damage of elastomer 2, improves the reliability for using.In order to further improve sealing, rosette I 6 and sheath 1, rosette
II 9 with the connecting portion of sheath 1, the connecting portion and rosette II 9 and cover plate II 10 of rosette I 6 and cover plate I 7
Connecting portion is respectively arranged with sealant layer.Rubberised layer is provided with elongated hole 3, rubberised layer compensates strain gauge 4 and quasiconductor
Piece 5 is sealed in elongated hole 3.Rubberised layer 17 is provided between bedplate II 16 and elastomer 2 and the inwall of sheath 1.So as to further
Improve the effect of waterproof anti-corrosion.
Further, also including the wireless transmitter module for being fixed on the outside of sheath 1, the wireless transmitter module is connected to electricity
Road plate 11.The digital force sensor measuring of this great force value to result by wireless transmitter module carry out signal wireless transmit pass
It is defeated, effectively increase the transmission range of signal.
Elastomer 2 is made using following steps：A) elastomer 2 is Jing after lathe turning molding, into sodium hydroxide, carbonic acid
Sodium, tertiary sodium phosphate and water are according to 1:2:0.3:Soak 20-30 minutes in the alkaline solution that 5 ratio is made into, by alkaline solution
The oils and fatss that elastomer 2 adheres in machining are cleaned.B) elastomer 2 Jing after alkaline solution immersion is put into into concentration for 70%-
Soak 5-8 minutes in 85% sulfuric acid solution, cleaned up the rusty stain on elastomer 2 by sulfuric acid solution, the follow-up plating of preventing and treating
When metal level adhere to unstable situation and occur.C) sandblasting is carried out to the outer surface of elastomer 2 using sandblasting machine, elastomer 2
Outer surface forms some 15-20 μm of recessed groove；D) mixed liquor of 40CrNiMoA material powders and silica gel is filled to recessed groove
In, silica gel it possess viscosity and can prevent 40CrNiMoA material powders from overflowing from recessed groove.E) by the outer surface of elastomer 2 electricity
Plating forms the metal level that material is 40CrNiMoA；F) elastomer 2 is heated to into 1200 DEG C, and is incubated 2-3 minutes, be now recessed
40CrNiMoA material powders in groove are electroplated the 40CrNiMoA metal levels to be formed with appearance and are combined together after melting.G) will add
Elastomer 2 after heat is cooled to natural temperature, and now the 40CrNiMoA metals of the outer layer of whole elastomer 2 are due to there is multiple being placed in
Metal dots in recessed groove, therefore whole metal level is difficult for drop-off, so as to improve the erosion-resisting durable of whole elastomer 2
Property.
Claims (8)
1. the digital force transducer of a kind of great force value, it is characterised in that include：In tube structure and upper and lower end opening sheath
（1）, be vertically positioned at sheath（1）In elastomer（2）, sealing welding is in sheath（1）Bedplate I at lower ending opening（15）, point
Sheath is not fixed on it（1）The rosette I of both sides（6）And rosette II（9）, be arranged at rosette I（6）In battery case（8）With
And it is arranged at rosette II（9）In the circuit board for being provided with Wheatstone bridge（11）, the elastomer（2）Top is located at sheath
（1）The outside of upper end open and its into ball head structure, elastomer（2）Lower end by threaded fastener and bedplate I（15）Phase
Even, the elastomer（2）With sheath（1）Upper end open at be tightly connected by sealing device, positioned at sheath（1）Interior elasticity
Body（2）It is above axially disposed to have elongated hole（3）, strain gauge（4）And quasiconductor compensating plate（5）It is arranged at elongated hole（3）In, positioned at shield
Set（1）Interior elastomer（2）On warming resistor is installed（12）, described, strain gauge（4）, quasiconductor compensating plate（5）, warming
Resistor（12）And battery case（6）It is all connected to circuit board（11）, the rosette I（6）Cover plate I is fixed with outer end opening
（7）, the rosette II（9）Outer end opening at be fixed with cover plate II（10）.
2. the digital force transducer of great force value according to claim 1, it is characterised in that：The sealing device includes annulus
The diaphragm of shape（13）With film ring（14）, his elastomer（2）It is plugged in film ring（14）Endoporus and sealing against each other be welded and fixed,
The film ring（14）It is plugged in diaphragm（13）Endoporus in and seal against each other and be welded and fixed, the film ring（14）Outer ring be plugged in
Sheath（1）Upper end open at, and seal against each other and be welded and fixed.
3. the digital force transducer of great force value according to claim 1, it is characterised in that：Also include being arranged at elastomer
（2）With bedplate I（15）Between bedplate II（16）, the bedplate II（16）Lower surface and bedplate I（15）It is upper
End face contacts, the bedplate II（16）Upper surface and elastomer（2）Lower surface contact, the bedplate II（16）
Comprcssive strength be less than bedplate I（15）Comprcssive strength.
4. the digital force transducer of great force value according to claim 1 or 2 or 3, it is characterised in that：The rosette I（6）
With sheath（1）, rosette II（9）With sheath（1）Connecting portion, rosette I（6）With cover plate I（7）Connecting portion and connect
Line box II（9）With cover plate II（10）Connecting portion be respectively arranged with sealant layer.
5. the digital force transducer of great force value according to claim 4, it is characterised in that：The elongated hole（3）Inside it is provided with
Rubberised layer, the rubberised layer is by strain gauge（4）And quasiconductor compensating plate（5）It is sealed in elongated hole（3）It is interior.
6. the digital force transducer of great force value according to claim 4, it is characterised in that：Also include being fixed on sheath（1）
The wireless transmitter module in outside, the wireless transmitter module is connected to circuit board（11）.
7. the digital force transducer of great force value according to claim 3, it is characterised in that：The bedplate II（16）With bullet
Gonosome（2）And sheath（1）Rubberised layer is provided between inwall（17）.
8. the digital force transducer of great force value according to claim 1, it is characterised in that：The elastomer（2）Using such as
Lower step is made：
A) elastomer（2）Jing after lathe turning molding, into sodium hydroxide, sodium carbonate, tertiary sodium phosphate and water according to 1:2:0.3:5
The alkaline solution that is made into of ratio in soak 20-30 minutes；
B) by the elastomer Jing after alkaline solution immersion（2）It is put in the sulfuric acid solution that concentration is 70%-85% and soaks 5-8 minutes；
C) using sandblasting machine to elastomer（2）Outer surface carry out sandblasting, elastomer（2）Outer surface form some 15-20 μm
Recessed groove；
D) mixed liquor of 40CrNiMoA material powders and silica gel is filled into recessed groove；
E) by elastomer（2）Outer surface electroplates the metal level to form that material is 40CrNiMoA；
F) by elastomer（2）1200 DEG C are heated to, and are incubated 2-3 minutes；
G) by the elastomer after heating（2）It is cooled to natural temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710062378.8A CN106595917A (en) | 2017-02-03 | 2017-02-03 | Large-force-value digital force sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710062378.8A CN106595917A (en) | 2017-02-03 | 2017-02-03 | Large-force-value digital force sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106595917A true CN106595917A (en) | 2017-04-26 |
Family
ID=58586978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710062378.8A Pending CN106595917A (en) | 2017-02-03 | 2017-02-03 | Large-force-value digital force sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106595917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117553946A (en) * | 2024-01-12 | 2024-02-13 | 锐马（福建）电气制造有限公司 | Temperature compensation method for force transducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117553946A (en) * | 2024-01-12 | 2024-02-13 | 锐马（福建）电气制造有限公司 | Temperature compensation method for force transducer |
| CN117553946B (en) * | 2024-01-12 | 2024-06-04 | 锐马（福建）电气制造有限公司 | Temperature compensation method for force transducer |
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Application publication date: 20170426 |