CN209588971U - The intelligent anchor bolt of multiaxis strain ga(u)ge and the built-in multiaxis strain ga(u)ge - Google Patents
The intelligent anchor bolt of multiaxis strain ga(u)ge and the built-in multiaxis strain ga(u)ge Download PDFInfo
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- CN209588971U CN209588971U CN201920066638.3U CN201920066638U CN209588971U CN 209588971 U CN209588971 U CN 209588971U CN 201920066638 U CN201920066638 U CN 201920066638U CN 209588971 U CN209588971 U CN 209588971U
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Abstract
The intelligent anchor bolt of multiaxis strain ga(u)ge and the built-in multiaxis strain ga(u)ge, the strain ga(u)ge includes: conducting wire, substrate and the bridge circuit that base internal is arranged in, the bridge circuit includes: four resistance sensitive grids, first resistor sensitive grid and second resistance sensitive grid connect to form branch one, 3rd resistor sensitive grid and the 4th resistance sensitive grid connect to form branch two, it is in parallel between branch one and branch two, intermediate point is arranged in two branches, voltage difference U 1 between two intermediate points, when anchor bolt is axially not subject to pressure, above-mentioned 4 resistances are equal；When axial force increases, the resistance value of first resistor sensitive grid and 3rd resistor sensitive grid becomes larger, and voltage difference U 1 then becomes larger, and voltage difference U 1 sends a signal to interlock circuit, to calculate voltage value, axial deformation amount and axial force.A blind hole is issued in anchor bolt nut installation direction, multiaxis strain ga(u)ge, which is embedded into blind hole, monitors axial stress.
Description
Technical field
The present invention relates to architectural engineering anchoring assembly fields, and in particular to multiaxis strain ga(u)ge and built-in multiaxis resistance
The anchor bolt of strain gauge monitoring axial stress.
Background technique
Anchor bolt is a kind of component that steel construction piece and concrete are tightly fastened, and anchor bolt one end is deep into inside concrete and melts
It is integrated, other end is closely connected by gasket, nut and steel construction piece.It is commonly used for highway bridge, dam, advertisement
The equipment in the places such as board, curtain wall, industrial premises is installed and is fixed.In practical applications since the lack of standardization of installation, environment occur
The combined causes such as variation and natural aging, so that exceed prestress value range, thus cannot achieve effective carrying of anchor bolt,
The service life of equipment is shortened, causes to be caused an accident by falling off for anchoring piece under serious situation.Therefore it supervises in real time in use
The stress working condition for surveying anchor bolt is necessary.The prior art has improvement of the strain ga(u)ge in bolt/anchor bolt, see with
Lower documents:
The patent disclosure " a kind of intelligent bolt " that number of patent application is CN201520131780.3, bolt use through-hole knot
Structure, optical fiber pass through through-hole, therefore optical fiber is not suitable for the anchor bolt structure of one end Transducers Embedded in Concrete through bolt.Fibre Optical Sensor simultaneously
Device needs the mating biggish Grating Modulation demodulator of volume that could work, and fiber grating modem is due to generating laser and adjusting
Signal processed, therefore the big power consumption of volume is high, is not suitable for in-site installation, and indicate its working condition.Meanwhile this patent application structure is
Bolt, structure and Force principle are different from anchor bolt.
It is disclosed in the Chinese patent literature that number of patent application is 201610933180.8 " a kind of to be surveyed for concrete stress
The strain ga(u)ge of examination ", including two layers of elastomer, two layers of elastomer are sandwiched between strain gauge；Strain gauge includes strain gauge substrate,
There is strain gauge sensitive grid, strain gauge sensitive grid is connected with strain gauge pad, and strain gauge sensitive grid two sides are in strain gauge substrate
Strain gauge side grid；Include the elastomer patch region for fixing strain gauge sensitive grid on one of elastomer, and is used for
The strain gauge pad installation region of fixed strain gauge pad, strain gauge pad installation region side are provided with connection strain gauge pad
The conducting wire placement region of installation region and elastomeric outer.The documents are to be sandwiched between strain gauge in two layers of elastomer, are led to
The mode for crossing setting strain gauge sensitive grid carries out concrete stress test.Using uniaxial strain ga(u)ge in the documents, i.e.,
Only has 1 resistance in strain gauge substrate, only 1 resistance changes when deformation occurs for elastomer, also, documents
It is middle that temperature-compensating and distortion measurement are completed by a resistance, distortion measurement and temperature-compensating are handled by a resistance simultaneously
Two functions are difficult.
A kind of " direct-reading tension-measuring anchor rod " is disclosed in the Chinese patent literature that number of patent application is 02255332.0, is belonged to
Device for measuring force in mine and geotechnical engineering, it is mainly made of screw-thread steel, strain ga(u)ge, protective rubber etc..This is practical new
Type uses strain ga(u)ge as sensing element, which is both suspension device and experiences the elastomer of external force variation.Gu
The strain ga(u)ge tied on screw-thread steel forms full-bridge circuit, thus improves the sensitivity of measurement, can be straight by secondary meter
It connects and reads anchor pole institute stress value.By 4 strain ga(u)ges of installation for measuring in the documents, since resistance-strain measures
Micro- deformation is measured, in order to guarantee the validity of installation, installment work is subtle and careful, and installment work consumes the plenty of time, installation 4
It is 4 times for installing 1 strain ga(u)ge in the time principle of a strain ga(u)ge, in addition, the number of installation is more, then installing
Generated probability of failure also just accordingly increases, and therefore, 4 strain ga(u)ges in the documents are installed complicated.
For this purpose, the inventor of the utility model optimizes on the basis of existing technology by continuous experimental study
It improves, proposes the anchor bolt of a kind of multiaxis strain ga(u)ge and built-in multiaxis strain ga(u)ge monitoring axial stress, it is existing to solve
There is the problem of technology.
Summary of the invention
For the defect for overcoming the above-mentioned prior art, the purpose of this utility model is to provide a kind of simple multiaxis electricity of structure
Hinder strain gauge.
The second of the utility model is designed to provide that a kind of structure is simple, built-in multiaxis strain ga(u)ge easy to use
Monitor the intelligent anchor bolt of axial stress.
To achieve the above object, the technical solution adopted in the utility model is as follows:
It is a kind of for detecting the multiaxis strain ga(u)ge of fastener axial pre tightening force, the multiaxis strain ga(u)ge 6 wraps
Include: conducting wire 1, substrate 2 and the bridge circuit being arranged in inside substrate 2, the bridge circuit include: first resistor sensitive grid
R1, second resistance sensitive grid R2,3rd resistor sensitive grid R3 and the 4th resistance sensitive grid R4, the first resistor sensitive grid R1
It connects to form branch one with second resistance sensitive grid R2, the 3rd resistor sensitive grid R3 and the 4th resistance sensitive grid R4 series connection
Branch two is formed, in parallel between branch one and branch two, the first resistor sensitive grid R1 and second resistance of the branch one are sensitive
First intermediate point A is set between grid R2, is set between the 3rd resistor sensitive grid R3 of the branch two and the 4th resistance sensitive grid R4
The second intermediate point B is set, measures what the voltage difference U 1 of the first intermediate point A and the second intermediate point B changed as the axial pre tightening force
Monitoring signals.
The calculation formula of the voltage difference U 1 are as follows: when applying voltage U0 to bridge circuit, U1=U0 [R3/ (R3+R4)-
R2/ (R1+R2)] or U1=U0 [R2 (R1+R2)-R3/ (R3+R4)], and the first resistor sensitive grid R1, second resistance are sensitive
Grid R2,3rd resistor sensitive grid R3 and the 4th resistance sensitive grid R4 are designed to when the multiaxis strain ga(u)ge is not by axial direction
R3=R4=R2=R1 when power.
The multiaxis strain ga(u)ge, first resistor sensitive grid R1 and 3rd resistor sensitive grid R3 are designed to resistance value
It is to generate the resistance sensitive grid of variation with deformation, material is constantan or card Ma, and when axial tension increases, axial length increases
Add, first resistor sensitive grid R1 and 3rd resistor sensitive grid R3 resistance value increase.
The multiaxis strain ga(u)ge, second resistance sensitive grid R2 and the 4th resistance sensitive grid R4 are designed to resistance value
The resistance sensitive grid not changed with deformation, be positive tc compensation resistance, and material is nickel.
The multiaxis strain ga(u)ge, the material of the substrate 2 are phenolic aldehyde or polyimides glue.
A kind of intelligent anchor bolt of built-in aforementioned multiaxis strain ga(u)ge, the anchor bolt includes stud 7 and nut 4, the spiral shell
Column 7 issues a blind hole 3 in the installation direction of the nut 4, the multiaxis strain ga(u)ge 6 be embedded into the blind hole 3 with
For monitoring the axial stress of the anchor bolt whether in normal range.
The intelligent anchor bolt, intelligent anchor bolt further include control unit, and the voltage difference U 1 is transferred to control unit, described
Control unit calculates axial deformation amount and corresponding axial force according to the voltage difference U 1 and judges whether fastener is normal；Institute
Stating control unit includes signal processing unit, microprocessor, signal transmission unit, prewarning unit；The prewarning unit includes existing
Field prompt unit and remote terminal prewarning unit, the signal transmission unit are equipped with for transmitting signal to live prompt unit
Wire communication circuit and for remote terminal prewarning unit transmission signal radio communication circuit 14.
The intelligent anchor bolt, the signal processing unit include amplifying circuit 10, analog to digital conversion circuit 11；The resistance
Voltage difference U 1 is sent to the amplifying circuit 10 by strain gauge 6, and the amplifying circuit 10 is sent to modulus and turns after amplifying pressure difference
Change circuit 11, digital signal is sent to microprocessor 12 by analog-digital conversion circuit as described 11, and the microprocessor 12 is according to described
Digital signal judges whether the axial pre tightening force of the anchor bolt is sent respectively to indicate in normal range, and by judging result
Circuit 13 and radio communication circuit 14；The microprocessor 12 is filtered the digital signal, rejects interference signal, screening
Effective digital signal out calculates the practical pressure born of sensor according to the corresponding relationship of digital signal and stress；Then
The practical pressure born of sensor pre-tightens force threshold with anchor bolt and compares, and judges whether intelligent anchor bolt working condition is normal.
The intelligent anchor bolt, when microprocessor 12 judges that the practical pressure born of the strain ga(u)ge is greater than the anchor
Bolt pretightning force threshold maximum value, the microprocessor 12 issue overload prompt to the prewarning unit；When microprocessor judges institute
It states and thinks that pretightning force is reduced when the practical pressure born of strain ga(u)ge pre-tightens force threshold minimum value lower than the anchor bolt, it is described micro-
Processor is issued to the prewarning unit loosens prompt.
The intelligent anchor bolt, the intelligence anchor bolt further includes cone nut 9 and gasket 5, and the gasket 5 is set in stud 7, position
Between the nut 4 and cone nut 9.
Using the utility model has the beneficial effects that:
First, there are 4 resistance sensitive grid built-up circuits, first resistor in multiaxis strain ga(u)ge substrate in the utility model
Sensitive grid R1 and 3rd resistor sensitive grid R3 generates change in resistance with deformation, when circuit in same deformation, the utility model
The voltage amplitude of output is 2 times of 1 resistance built-up circuit output voltage, therefore this programme sensitivity is increased, and is especially being measured
Function is significant when micro- deformation；
Second, second resistance sensitive grid R2 and the 4th resistance sensitive grid R4 is mended as independent temperature in the utility model circuit
Charging resistance uses ambrose alloy material, is arranged on temperature compensation parameter more flexible, more independently, avoids handling shape by resistance
Become the difficult point that measurement mutually takes into account with temperature-compensating.
Third, the utility model integrate 4 resistance sensitive grids by the way of one using 1 multiaxis strain ga(u)ge, section
It saves time, reduces probability of failure caused by installing.
4th, the utility model uses 4 resistance sensitivity grid materials, and 2 are served only for temperature-compensating, eliminates measurement by temperature
The influence of compensation, 2, which are served only for measurement deformation, has strong implementation.
5th, the utility model multiaxis strain ga(u)ge structure is simple, circuit theory is simple and convenient to operate, and is easy to use
In the anchor bolt of monitoring axial stress；The anchor bolt of the built-in multiaxis strain ga(u)ge monitoring axial stress of the utility model, because of energy
The pretightning force of enough anchor bolts of monitoring in real time simultaneously can issue prompt information, and engineering staff convenient and efficient can efficiently note abnormalities
Anchor bolt carries out checking that in time excluding hidden danger avoids causing danger, and the technical solution of the application greatly improves the safety of anchor bolt
Energy and reliability, while greatly having saved the cost of overhaul.
Detailed description of the invention
Fig. 1 is the anchor bolt that axis strain ga(u)ge built in the utility model monitors axial stress；
Fig. 2 is the structural schematic diagram of the utility model strain ga(u)ge；
Fig. 3 is the circuit diagram of the utility model strain ga(u)ge；
Fig. 4 is the electrical block schematic illustration that the utility model anchor bolt realizes monitoring；
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of anchor bolt of built-in resistor strain gauge monitoring axial stress, the anchor bolt includes cone nut 9, spiral shell
Column 7 and nut 4 further include gasket 5, and the gasket 5 is set on the stud 7, be located at the cone nut 9 and the nut 4 it
Between, the stud 7 issues a blind hole 3 in the installation direction of the nut 4, and the strain ga(u)ge 6 is embedded into the blind hole 3
In with the axial stress for monitoring the anchor bolt whether in normal range.
The voltage difference U 1 is transferred to control unit, and described control unit calculates axial deformation amount according to the voltage difference U 1
And corresponding axial force and judge whether fastener is normal；Described control unit includes signal processing unit, microprocessor, letter
Number transmission unit, prewarning unit；The prewarning unit includes live prompt unit and remote terminal prewarning unit, and the signal passes
Defeated unit is equipped with for the wire communication circuit to live prompt unit transmission signal and for passing to remote terminal prewarning unit
The radio communication circuit 14 of defeated signal；The signal processing unit includes amplifying circuit 10, analog to digital conversion circuit 11；The resistance
Voltage difference U 1 is sent to the amplifying circuit 10 by strain gauge 6, and the amplifying circuit 10 is sent to modulus and turns after amplifying pressure difference
Change circuit 11, digital signal is sent to microprocessor 12 by analog-digital conversion circuit as described 11, and the microprocessor 12 is according to described
Digital signal judges whether the axial pre tightening force of the anchor bolt is sent respectively to indicate in normal range, and by judging result
Circuit 13 and radio communication circuit 14；The microprocessor 12 is filtered the digital signal, rejects interference signal, screening
Effective digital signal out calculates the practical pressure born of sensor according to the corresponding relationship of digital signal and stress；Then
The practical pressure born of sensor pre-tightens force threshold with anchor bolt and compares, and judges whether intelligent anchor bolt working condition is normal；When micro-
Processor 12 judges that the practical pressure born of the strain ga(u)ge is greater than the anchor bolt pretightning force threshold maximum value, micro- place
It manages device 12 and issues overload prompt to the prewarning unit；When microprocessor judges that the practical pressure born of the strain ga(u)ge is low
Think that pretightning force is reduced when the anchor bolt pre-tightens force threshold minimum value, the microprocessor is issued to the prewarning unit to be loosened
Prompt.
As shown in Figure 2 and Figure 3, the axis strain ga(u)ge 6 includes: the electric bridge that conducting wire 1 substrate 2 He is arranged in inside substrate 2
Circuit, the bridge circuit include: first resistor sensitive grid R1, second resistance sensitive grid R2,3rd resistor sensitive grid R3 and
4th resistance sensitive grid R4, the first resistor sensitive grid R1 and second resistance sensitive grid R2 connects to form branch one, described
3rd resistor sensitive grid R3 and the 4th resistance sensitive grid R4 connect to form branch two, in parallel between branch one and branch two, institute
It states and the first intermediate point A is set between the first resistor sensitive grid R1 of branch one and second resistance sensitive grid R2, the branch two
Second intermediate point B, the first intermediate point A and the second intermediate point are set between 3rd resistor sensitive grid R3 and the 4th resistance sensitive grid R4
The voltage difference U 1 of B, when anchor bolt is axially not subject to pressure, above-mentioned 4 resistance sensitive grid resistance value is equal, and voltage difference U 1 is 0V；When
When axial force increases, the resistance value of first resistor sensitive grid R1 and 3rd resistor sensitive grid R3 become larger, and voltage difference U 1 then becomes larger, voltage
Poor U1 sends a signal to interlock circuit, to calculate voltage value, axial deformation amount and axial force；When axial force crosses novel
The failure of bright pretightning force illustrates that the excessive lost of life of anchor bolt load even fails when axial force is excessive.
Illustrate around here, the material in the base 2 is phenolic aldehyde or polyimides glue；First resistor sensitive grid R1 and
3rd resistor sensitive grid R3 is to generate the resistance of variation with deformation, and material is constantan or card Ma, when axial tension increases,
Axial length increases, and first resistor sensitive grid R1 and 3rd resistor sensitive grid R3 resistance value increase；Second resistance sensitive grid R2 and
The resistance value of four resistance sensitive grid R4 does not change with deformation, and be positive tc compensation resistance, and material is nickel.
When applying voltage U0 to bridge circuit, the voltage difference U 1 of the second intermediate point B and the first intermediate point A: voltage difference U 1
=U0 [R3/ (R3+R4)-R2/ (R1+R2)]；Alternatively, the voltage difference U 1 of the first intermediate point A and the second intermediate point B: voltage difference U 1
=U0 [R2 (R1+R2)-R3/ (R3+R4)].
As shown in figure 4, the interlock circuit is amplifying circuit 10, analog to digital conversion circuit 11, microprocessor 12, instruction electricity
Voltage difference U 1 is sent to amplifying circuit 10, institute by conducting wire 1 by road 13 and radio communication circuit 14, the strain ga(u)ge 6
The amplifying circuit 10 stated is sent to analog to digital conversion circuit 11 after amplifying pressure difference, analog-digital conversion circuit as described 11 sends out digital signal
Microprocessor 12 is given, signal is sent respectively to indicating circuit 13 and radio communication circuit 14 by the microprocessor 12, described
Power circuit 16 provides voltage U0 for strain ga(u)ge 6 and foregoing circuit；Strain ga(u)ge 6 passes through conducting wire 1 for voltage difference U 1
It is sent to amplifying circuit 10, signal is converted to digital signal by analog to digital conversion circuit 11 after the amplification of amplifying circuit 10, number
Signal is sent to microcontroller 12, and microcontroller 12 is according to above-mentioned Digital Signals condition indication circuit 13 and telecommunication circuit 14
Work.
Strain ga(u)ge 6 forms bridge circuit, and power circuit 15 provides excitation power supply to electric bridge, and electric bridge output is lower than 5mV
Faint voltage signal is enlarged at least 50mV or more analog voltage signal through amplifying circuit 10.Analog signal turns by modulus
It changes circuit 11 and analog signal is converted to digital signal.
Illustrate around here, the model STM8L151 of 12 chip of microprocessor, foregoing circuit can use this field skill
The prior art well known to art personnel, these circuits are also not the key point of the present utility model application, so, in the application just not
It is described in detail one by one again.
The above, the only preferred embodiment of the utility model, not do limit in any form to the utility model
System.Anyone skilled in the art, in the case where not departing from technical solutions of the utility model ambit, all using above-mentioned
The technology contents make many possible changes and modifications to technical solutions of the utility model, or be revised as equivalent variations etc.
Imitate embodiment.Therefore, all contents without departing from technical solutions of the utility model, the technology according to the utility model is to the above reality
Any change modification, equivalent variations and modification that example is made are applied, the protection scope of the technical program is belonged to.
Claims (10)
1. a kind of multiaxis strain ga(u)ge, for detecting fastener axial pre tightening force, feature exists the multiaxis strain ga(u)ge
In: the multiaxis strain ga(u)ge (6) includes: the bridge circuit of conducting wire (1), substrate (2) and setting in substrate (2) inside,
The bridge circuit includes: first resistor sensitive grid (R1), second resistance sensitive grid (R2), 3rd resistor sensitive grid (R3) and
4th resistance sensitive grid (R4), the first resistor sensitive grid (R1) and second resistance sensitive grid (R2) series connection form branch
One, the 3rd resistor sensitive grid (R3) and the series connection of the 4th resistance sensitive grid (R4) form branch two, branch one and branch two
Between it is in parallel, the first intermediate point is set between the first resistor sensitive grid (R1) and second resistance sensitive grid (R2) of the branch one
(A), the second intermediate point (B) is set between the 3rd resistor sensitive grid (R3) and the 4th resistance sensitive grid (R4) of the branch two,
Measure the monitoring signals that the voltage difference U 1 of the first intermediate point (A) and the second intermediate point (B) changes as the axial pre tightening force.
2. multiaxis strain ga(u)ge according to claim 1, it is characterised in that: the calculation formula of the voltage difference U 1 are as follows:
When applying voltage U0 to bridge circuit, U1=U0 [R3/ (R3+R4)-R2/ (R1+R2)] or U1=U0 [R2 (R1+R2)-R3/
(R3+R4)], and the first resistor sensitive grid (R1), second resistance sensitive grid (R2), 3rd resistor sensitive grid (R3) and the 4th
Resistance sensitive grid (R4) is designed to the R3=R4=R2=R1 when the strain ga(u)ge is not by axial force.
3. multiaxis strain ga(u)ge according to claim 2, it is characterised in that: first resistor sensitive grid (R1) and third electricity
It is to generate the resistance sensitive grid of variation with deformation that resistance sensitive grid (R3), which is designed to resistance value, and material is constantan or card Ma,
When axial tension increases, axial length increases, and first resistor sensitive grid (R1) and 3rd resistor sensitive grid (R3) resistance value increase.
4. multiaxis strain ga(u)ge according to claim 2, it is characterised in that: second resistance sensitive grid (R2) and the 4th electricity
Resistance sensitive grid (R4) is designed to the resistance sensitive grid that resistance value does not change with deformation, and the tc compensation resistance that is positive is sensitive
Grid, material are nickel.
5. multiaxis strain ga(u)ge according to claim 1-4, it is characterised in that: the material of the substrate (2)
For phenolic aldehyde or polyimides glue.
6. a kind of intelligent anchor bolt of the described in any item multiaxis strain ga(u)ges of built-in the claims 1-5, the anchor bolt packet
Include stud (7) and nut (4), which is characterized in that the stud (7) issues a blind hole in the installation direction of the nut (4)
(3), the multiaxis strain ga(u)ge (6) be embedded into the blind hole (3) with the axial stress for monitoring the anchor bolt whether
In normal range.
7. intelligence anchor bolt according to claim 6, it is characterised in that: intelligent anchor bolt further includes control unit, the voltage
Poor U1 is transferred to control unit, and described control unit calculates axial deformation amount and corresponding axial force according to the voltage difference U 1
And judge whether fastener is normal；Described control unit includes signal processing unit, microprocessor, signal transmission unit, early warning
Unit；The prewarning unit includes live prompt unit and remote terminal prewarning unit, and the signal transmission unit is equipped with and is used for
To the wire communication circuit of live prompt unit transmission signal and for the channel radio to remote terminal prewarning unit transmission signal
Believe circuit (14).
8. intelligence anchor bolt according to claim 7, it is characterised in that: the signal processing unit includes amplifying circuit
(10), analog to digital conversion circuit (11)；Voltage difference U 1 is sent to the amplifying circuit (10) by the multiaxis strain ga(u)ge (6),
The amplifying circuit (10) is sent to analog to digital conversion circuit (11) after amplifying pressure difference, and analog-digital conversion circuit as described (11) will be digital
Signal is sent to microprocessor (12), and the microprocessor (12) judges the axial pretightening of the anchor bolt according to the digital signal
Judging result is sent respectively to indicating circuit (13) and radio communication circuit (14) whether in normal range by power；Institute
It states microprocessor (12) to be filtered the digital signal, rejects interference signal, effective digital signal is filtered out, according to number
The corresponding relationship of signal and stress calculates the practical pressure born of sensor；Then the practical pressure born of sensor with
Anchor bolt pre-tightens force threshold and compares, and judges whether intelligent anchor bolt working condition is normal.
9. intelligence anchor bolt according to claim 8, it is characterised in that: when microprocessor (12) judges the strain ga(u)ge
The pressure actually born is greater than the anchor bolt pretightning force threshold maximum value, and microprocessor (12) the Xiang Suoshu prewarning unit issues
Overload prompt；When microprocessor judges that the practical pressure born of the strain ga(u)ge pre-tightens force threshold minimum lower than the anchor bolt
Think that pretightning force is reduced when value, the microprocessor is issued to the prewarning unit loosens prompt.
10. intelligence anchor bolt according to claim 6, it is characterised in that: the intelligence anchor bolt further includes cone nut (9) and gasket
(5), the gasket (5) is set in stud (7), between the nut (4) and cone nut (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920066638.3U CN209588971U (en) | 2019-01-15 | 2019-01-15 | The intelligent anchor bolt of multiaxis strain ga(u)ge and the built-in multiaxis strain ga(u)ge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920066638.3U CN209588971U (en) | 2019-01-15 | 2019-01-15 | The intelligent anchor bolt of multiaxis strain ga(u)ge and the built-in multiaxis strain ga(u)ge |
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|---|---|
| CN209588971U true CN209588971U (en) | 2019-11-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021125126A1 (en) * | 2019-12-17 | 2021-06-24 | 株式会社ＮｅｊｉＬａｗ | Coupling member and measurement system |
| CN113655729A (en) * | 2021-10-20 | 2021-11-16 | 北京创米智汇物联科技有限公司 | Control device, control method, control system, and storage medium |
| CN114777970A (en) * | 2022-05-23 | 2022-07-22 | 电子科技大学 | Film strain gauge bridge circuit based on flexible circuit board on high-rigidity force measuring knife handle |
-
2019
- 2019-01-15 CN CN201920066638.3U patent/CN209588971U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021125126A1 (en) * | 2019-12-17 | 2021-06-24 | 株式会社ＮｅｊｉＬａｗ | Coupling member and measurement system |
| JP2021096162A (en) * | 2019-12-17 | 2021-06-24 | 株式会社ＮｅｊｉＬａｗ | Connection member and measurement system |
| US20230098763A1 (en) * | 2019-12-17 | 2023-03-30 | NejiLaw inc. | Coupling member and measurement system |
| CN113655729A (en) * | 2021-10-20 | 2021-11-16 | 北京创米智汇物联科技有限公司 | Control device, control method, control system, and storage medium |
| CN113655729B (en) * | 2021-10-20 | 2021-12-14 | 北京创米智汇物联科技有限公司 | Control device, control method, control system, and storage medium |
| CN114777970A (en) * | 2022-05-23 | 2022-07-22 | 电子科技大学 | Film strain gauge bridge circuit based on flexible circuit board on high-rigidity force measuring knife handle |
| CN114777970B (en) * | 2022-05-23 | 2023-04-11 | 电子科技大学 | Film strain gauge bridge circuit based on flexible circuit board on high-rigidity force measuring knife handle |
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