CN101275858A - Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof - Google Patents
Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof Download PDFInfo
- Publication number
- CN101275858A CN101275858A CNA2008100968854A CN200810096885A CN101275858A CN 101275858 A CN101275858 A CN 101275858A CN A2008100968854 A CNA2008100968854 A CN A2008100968854A CN 200810096885 A CN200810096885 A CN 200810096885A CN 101275858 A CN101275858 A CN 101275858A
- Authority
- CN
- China
- Prior art keywords
- angle
- steel structure
- metallic cord
- frequency
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 111
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims description 9
- 239000002184 metal Substances 0.000 claims abstract description 59
- 229910052751 metal Inorganic materials 0.000 claims abstract description 59
- 238000005070 sampling Methods 0.000 claims abstract description 50
- 230000008859 change Effects 0.000 claims abstract description 14
- 230000004044 response Effects 0.000 claims description 20
- 230000004913 activation Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 8
- 230000008447 perception Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000005489 elastic deformation Effects 0.000 abstract 1
- 239000000306 component Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000005284 excitation Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a metallic cord type pulse output model angular displacement sensor for steel structure elastic angle used for detecting signals. The sensor is arranged on an assist device of a detected metal steel structure elastic angle sampling part. When the detected metal steel structure elastic angle is effected by angle external force, the sensor makes the metal steel structure elastic angle generate angular displacement of elastic deformation. The deformation angular displacement is transferred on a metallic cord via the assist device, the sampling department, a sampling part, a link arm, a reference junction and the link arm to make a angle constraint which the metallic cord gains generate a proportionality of micro change, so as to make natural vibration frequency of the metallic cord generate corresponding change. The invention transforms mechanical parameters natural frequency into electric quantity resonance frequency via a resonator and then sends the electric quantity resonance frequency to a detector. One outputing end of the detector is used for providing needed energy of metallic cord mechanical vibration as input of a drive, and at the same time the other end of the detector is used for providing output of detecting the signals. The sensor has the advantages of simple structure, high reliability, high sensitivity and long service life.
Description
Technical field
The present invention relates to a kind of sensor and measuring method thereof, particularly relate to a kind of angle micro-displacement sensor and measuring method thereof that is used for the metallic cord formula pulse output type of steel structure elastic angle detection.
Background technology
The classical classic method of measured angular micrometric displacement has two kinds.First resistance-strain chip angle micro-displacement sensor, it two is condenser type angle micro-displacement sensors.
1, strain chip angle micro-displacement sensor can define rigorously again and be " resistance-type semiconductor angular displacement sensor ", this sensor belongs to passive semiconductor devices class, be a kind of be used for specially measuring steel structure elastic angle when stressed the device of strain angular displacement takes place.Because object is subjected to the effect of angle external force, produces corresponding angular deformation, resistance-strain chip angle micro-displacement sensor just can be measured external force indirectly and act on the stressed size of steel structure elastic angle.
The measuring principle of resistance-strain chip angle micro-displacement sensor is: resistance-strain type angle micro-displacement sensor can be used as the resistor equivalence, sectional area and resistivity one timing when resistive conductor, its resistance value is directly proportional with the length of resistive conductor, under the effect of no external force, after this resistance-strain chip angle micro-displacement sensor connects with certain circuit form, firmly closely sticked on the surface measurements of detected steel structure elastic angle.Be subjected to the time spent of doing of external force when this metal steel structure elastic angle, mechanical little deformation of corresponding geometric angle will take place in its metal steel structure elastic angle, by the resistance-strain chip angle micro-displacement sensor of firmly closely pasting geometric deformation being taken place thereupon also, or elongate and attenuate, or shortens chap.Because the angle sampling section of resistance-strain chip angle micro-displacement sensor, issue looks when answering little deformation of angle in the effect of external force, make the semiconductor lattice of micro-displacement sensor inside, resistance-strain chip angle that the dislocation distortion take place, thereby make this bulk resistor of resistance-strain chip angle micro-displacement sensor also along with the conversion of the angle micrometric displacement amount of metal steel structure elastic angle and change, type of attachment by different circuit, make the output voltage of resistance-strain chip angle micro-displacement sensor also along with the variation of the angle micrometric displacement amount of metal steel structure elastic angle and change, thereby reach the purpose that the little variable in the angle of carrying out the metal steel structure elastic angle is converted into the little variable of aanalogvoltage.
Resistance strain gage type sensor is from its birth development till now, the history of existing nearly three more than ten years, under desirable environmental baseline, micro-angular displacement resistance strain gage type sensor presents the external characteristics of good output, thereby micro-angular displacement foil gauge type sensor is employed in some fields.Because what micro-angular displacement foil gauge type sensor material adopted is semiconductor material, its basic physical characteristics distinguishingly under the occasion condition, has its fatal weakness at some.Its weakness is as follows:
● the core of resistance-strain chip angle micro-displacement sensor is that semi-conductive silicon materials are made, and its temperature is had higher sensitivity, therefore is not suitable for the bigger occasion of temperature variation span and uses.
● resistance-strain chip angle micro-displacement sensor is that semiconductor material is synthetic made, and its mechanical life is limited, and mission life is not more than half a year under continuously dynamic operating mode.
● when making resistance-strain chip angle micro-displacement sensor, need resistance strain gage firmly be sticked on the auxiliary mould spare closely, influence accuracy of detection to a certain extent with bonding agent.
● to product in batch, these Sensor core parts can only sampling Detection, can't carry out the detection of electric parameter to each core component, and therefore the quality of each product being held is to do indirectly.
2, condenser type angle micro-displacement sensor can be defined as " condenser type angle micro-displacement sensor " again, and this sensor belongs to passive device class, is that a kind of measured angular that is used for is specially answered the device of angle micrometric displacement.Because the object angle is subjected to the effect of angle external force, will produce the little deformation in corresponding angle, condenser type angle micro-displacement sensor just can be measured angle of departure external force indirectly and act on the stressed size in object angle, and external force is to little variable of object angle effect variation.
The measuring principle of condenser type angle micro-displacement sensor is: condenser type angle micro-displacement sensor can be used as the capacitor equivalence, the a pair of sheet metal that can carry out relatively little displacement is set as capacitor on the monitored angle of object, the projected area of two sheet metals or distance are the important parameters of this capacitance of decision.
In the following time of effect of no external force, after this condenser type angle micro-displacement sensor connects with certain circuit form, by closely fixedly on the testee angular measurement face.When this object angle time spent of doing that is subjected to external force useless, the projected area of two sheet metal or distance are static relatively, and are keeping the capability value of original static electric capacity.
In the following time of effect that external force is arranged, this object angle is subjected to the time spent of doing of external force, the projected area of two sheet metals that it is fixed or distance will take place to change relatively, thereby make the reference capacitance of condenser type angle micro-displacement sensor also along with the conversion of the angle micrometric displacement at object angle and change, type of attachment by different circuit, the variable quantity of capacitance is converted to voltage, make the output voltage of condenser type angle micro-displacement sensor change along with the variation of the angle micrometric displacement amount at testee angle, thereby reach projected area or distance variation relatively that the little variable in the angle of carrying out the object angle is converted into two sheet metals, then make the projected area or relative variation of distance of two sheet metals be converted to the variation of capacitance again, and then reach the purpose that electric capacitance change is converted to the little variable of aanalogvoltage.
Its weakness is as follows: 1, temperature is had higher sensitivity, be not suitable for the bigger occasion of temperature variation span and use.2, back and forth return difference is big for machinery, makes that reciprocal measuring accuracy error is big.3, anti-vibration characteristic is more weak, and incompatible occasion work in very severe influences accuracy of detection to a certain extent.
Summary of the invention
The objective of the invention is to overcome the weakness of the micro-angular displacement quantity sensor that above-mentioned resistance-type angle micro-displacement sensor and condenser type angle micro-displacement sensor detect as steel structure elastic angle, provide that a kind of sensing range is big, the life-span is long, dynamic response is fast, good stability, can carry out the full machines electrical property of product again, be used for the micro-angular displacement sensor of the metallic cord formula pulse output type of steel structure elastic angle detection.
Goal of the invention is achieved in that an end of a metallic cord (I) is fixed on reference on the end points (A), and links to each other with an end of sampling portion (E) by linking arm (C); The other end of metallic cord (I) be fixed on can little mobile sampling end points (B) on, and link to each other with the other end of sampling portion (E) by corresponding linking arm (D), sampling portion (E) and assistor (K) join.
An end that is used to detect the resonator (Y) of metallic cord (I) vibrational state is connected with wave detector (X), and the other end of resonator (Y) is connected with an end of driver (Z); An end that is used to extract the wave detector (X) of resonator (Y) electric signal is connected with the other end of driver (Z), and this end of wave detector (X) is connected with external circuit as output simultaneously; Wave detector (X), resonator (Y) and driver (Z) are converted to the resonant frequency electric weight with the mechanical resonance amount.
The measuring method of the angle micro-displacement sensor of the described metallic cord formula pulse output type that is used to detect steel structure elastic angle comprises: the metallic cord of sensor (I) be fixed on reference to end points (A) and can little mobile sampling end points (B) between, with reference to the linking arm (D) of the linking arm (C) of end points (A) and sampling end points (B) be fixed on sampling portion (E) above, and closely cooperate with assistor (K), the steel structure arm (H) that direct and detected steel structure elastic angle two ends, the two ends of assistor (K) prolong links to each other with steel structure arm (J), detect the sampling section of metal steel structure elastic angle (Φ), metallic cord (I) and with reference to end points (A), sampling end points (B) closely cooperates on technology; Connection measured angle probe (M) below sampling portion (E), described measured angle probe (M) plays the role of positioning when measuring; Described metallic cord (I), sampling portion (E) also constitute angle micrometric displacement triangle with assistor (K) and survey responsive part;
When no external force (F) acts on continuous two ends prolongation steel structure arm (H) of tested metal steel structure elastic angle (Φ) and steel structure arm (J), angle micrometric displacement triangle is surveyed the angle micrometric displacement that metal deformation does not take place responsive part, thereby the angle micrometric displacement triangle of surveying metal steel structure elastic angle (Φ) variation is surveyed the variable quantity that responsive part does not have perception metal steel structure elastic angle (Φ) yet, metallic cord this moment (I) is cooperating angle micrometric displacement triangle to survey responsive part, is keeping basic dwell angle tension force (F
2), this basic dwell angle tension force (F
2) determined the frequency (f of the intrinsic static vibration of metallic cord (I)
2 machines), the electric frequency (f that employs selectively of resonator (Y)
2) and the electrical activation frequency (f of driver (Z)
2 drive);
When external force (F) acts on tested metal steel structure elastic angle (Φ), acting on the two ends that link to each other prolongs on steel structure arm (H) and the steel structure arm (J), and pass to angle micrometric displacement triangle and survey responsive part, the angle micrometric displacement variable quantity (± ΔΦ) of metallic elastic angular deformation will take place in this part, simultaneously also make the displacement of the lines of assistor (K) length that the line micrometric displacement variable quantity of (± Δ L) also takes place, be used to survey the responsive variable quantity that partly perceives metal steel structure elastic angle (Φ ± ΔΦ) of angle micrometric displacement triangle detection that the metal steel structure elastic angle changes, when metallic cord this moment (I) is surveyed responsive part at cooperation angle micrometric displacement triangle, the resonant frequency high-speed response dynamic angular tension force (F of metallic cord (I)
2± Δ F) variation, the angle tension force (F of this dynamic change
2± Δ F) determined the frequency (f of metallic cord (I) dynamic vibration
2 machines± Δ f
Machine), the electric frequency (f that employs selectively of resonator (Y)
2± Δ f
) and the electrical activation frequency (f of driver (Z)
2 drive± Δ f
Drive) variation.
Be used to detect the frequency (f of metallic cord (I) dynamic vibration
2 machines± Δ f
Machine) the output terminal of resonator (Y) link to each other with the input end of wave detector (X), to finish the intrinsic mechanical vibration frequency signal (f of metallic cord (I)
2 machines± Δ f
Machine) to electric frequency signal (f
2± Δ f
) conversion; The output terminal of wave detector (X) links to each other with the input end of driver (Z), at its electrical activation frequency (f
2 drive± Δ f
Drive) driving under, make metallic cord (I) obtain the vibration energy needed, and make the frequency (f of metallic cord (I) proper vibration
2 machines± Δ f
Machine) drive resonance point response in the electromagnetic component with harmonic wave; Another road of wave detector (X) output is as the output of the electric frequency variable response of this sensor.
The invention has the advantages that: 1, highly sensitive: under the condition of equal angular detection radius, compare with the measuring accuracy of condenser type angle micro-displacement sensor with resistance-type angle micro-displacement sensor, can be to the grade of angle-measurement accuracy raising greater than a quantity; 2, adaptability is good: can carry out work in the radiation environment of various different-energy forms; 3, response speed is fast: because the responsive part quality of sampling is less, the frequency corresponding speed is fast; 4, output form: the electric signal of frequency number word string shape amount, be convenient to digitized signal transmission and processing; 5, long working life: the continuous working life-span is not less than 10 years; 6, environmental compatible is good: very strong antijamming capability is arranged, and good Electro Magnetic Compatibility is arranged; 7, from low in energy consumption: the self-heating influence is minimum; 8, simple in structure: as to be convenient to Installation and Debugging and maintenance.
Description of drawings
Fig. 1 is the physical parameter transitive relation figure of micro-angular displacement sensor;
Fig. 2 a: angle micro-displacement sensor theory structure relation;
Fig. 2 b: the angle micro-displacement sensor to steel structure angle is installed and physical parameter transitive relation figure.
Embodiment
Embodiment:
Implement structure: be used for steel structure elastic angle metallic cord formula pulse output type angle micro-displacement sensor basic design philosophy as shown in Figure 1, wherein metallic cord I who is used to vibrate, measured angle probe M, the E of sampling portion and cooperates formation triangle machinery to be configured to and the mechanical resonance amount is converted to the device of resonant frequency electric weight with assistor K ratio; The end of metallic cord I is fixed on reference on the terminal A, and links to each other with sampling portion E one end by linking arm C; The other end of metallic cord I be fixed on can little mobile sampling terminal B on, and link to each other with the other end of the E of sampling portion by linking arm D, the E of sampling portion and assistor K join, and constitute the angle micrometric displacement triangle detection sensitive part of geometry shapes; An end that is used to detect the resonator Y of metallic cord I vibrational state is connected with wave detector X, and the other end of resonator Y is connected with the end of driver Z; An end that is used to extract the wave detector X of resonator Y electric signal is connected with the other end of driver Z, and this end of wave detector X is connected with external circuit as output simultaneously.
When external force F acts on tested metal steel structure elastic angle Φ, acting on the two ends that link to each other prolongs on steel structure arm H and the steel structure arm J, and pass to angle micrometric displacement triangle and survey responsive part, the angle micrometric displacement variable quantity ± ΔΦ of metallic elastic angular deformation will take place in this part, simultaneously also make the displacement of the lines of assistor K length also take place ± the line micrometric displacement variable quantity of Δ L, be used to survey the responsive variable quantity that partly perceives metal steel structure elastic angle Φ ± ΔΦ of angle micrometric displacement triangle detection that the metal steel structure elastic angle changes, this moment, metallic cord I was when cooperating angle micrometric displacement triangle to survey responsive part, the resonant frequency high-speed response dynamic angular tension force F of metallic cord I
2The variation of ± Δ F, the angle tension force F of this dynamic change
2± Δ F has determined the frequency f of metallic cord I dynamic vibration
2 machines± Δ f
Machine, resonator Y the electric frequency f of employing selectively
2± Δ f
Electrical activation frequency f with driver Z
2 drive± Δ f
Drive
Be used to detect the frequency f of metallic cord I dynamic vibration
2 machines± Δ f
MachineThe output terminal of resonator Y link to each other with the input end of wave detector X, to finish the intrinsic mechanical vibration frequency signal f of metallic cord I
2 machines± Δ f
MachineTo electric frequency signal f
2± Δ f
Conversion.The electrical activation frequency f of the output terminal of wave detector X and driver Z
2 drive± Δ f
DriveExcitation under, make metallic cord I obtain the vibration energy needed, and make the frequency f of metallic cord I proper vibration
2 machines± Δ f
MachineThe response point that drives in the electromagnetic component with harmonic wave resonates.Another road of wave detector X output is as the output of the electric frequency variable response of this sensor.
If this sensor has three kinds of duties.
State 1: this sensor is when this state, and the metallic cord I of monitoring metal steel structure elastic angle Φ wrestles when being zero outside, and the duty of this moment is called the quiescent point of this sensor again, and this is the duty of the basic zero-bit of sensor.Metallic cord I is F at reference angle tension force
2State the time, just be installed in when no external force F acts on continuous two ends prolongation steel structure arm H of tested metal steel structure elastic angle Φ and steel structure arm J, be used to survey the responsive variable quantity that does not partly have perception metal steel structure elastic angle Φ of angle micrometric displacement triangle detection that metal steel structure elastic angle Φ changes, angle micrometric displacement triangle is surveyed the angle micrometric displacement that metal deformation does not take place responsive part yet, this moment, metallic cord I cooperated angle micrometric displacement triangle to survey responsive part, was still keeping basic dwell angle tension force F
2, this basic dwell angle tension force F
2Determined the frequency f of metallic cord 1 intrinsic static vibration
2 machines, resonator Y the electric frequency f of employing selectively
2Electrical activation frequency f with driver Z
2 driveAt this moment sensor mechanical vibration frequency f
2 machinesBoth equaled the frequency-selecting frequency f
2, also equal the electrical activation frequency f
2 drive, that is: f
2 machines=f
2=f
2 drive=f
2, so f
2Can be defined as the frequency of sensor quiescent point.
State 2: when external force F acts on tested metal steel structure elastic angle Φ, acting on the two ends that link to each other prolongs on steel structure arm H and the steel structure arm J, and pass to angle micrometric displacement triangle and survey responsive part, the angle micrometric displacement variable quantity-ΔΦ of metallic elastic angular deformation will take place in this part, simultaneously also make the displacement of the lines of assistor K length also take place-the line micrometric displacement variable quantity of Δ L, be used to survey the responsive variable quantity that partly perceives metal steel structure elastic angle Φ-ΔΦ of angle micrometric displacement triangle detection that the metal steel structure elastic angle changes, this moment, metallic cord I was when cooperating angle micrometric displacement triangle to survey responsive part, the variation of the resonant frequency high-speed response dynamic angular tension force F2-Δ F of metallic cord I, the angle tension force F of this dynamic change
2-Δ F has determined the frequency f of metallic cord I dynamic vibration
2 machines-Δ f
Machine=f
1 machine, resonator Y the electric frequency f of employing selectively
2-Δ f
=f
1Electrical activation frequency f with driver Z
2 drive-Δ f
Drive=f
1 drivesBe used to detect the frequency f of metallic cord I dynamic vibration
2 machines-Δ f
Machine=f
1 machineThe output terminal of resonator Y link to each other with the input end of wave detector X, to finish the intrinsic mechanical vibration frequency signal f of metallic cord I
2 machines-Δ f
Machine=f
1 machineTo electric frequency signal f
2-Δ f
=f
1Conversion.The electrical activation frequency f of the output terminal of wave detector X and driver Z
2 drive-Δ f
Drive=f
1 drivesExcitation under, make metallic cord I obtain the vibration energy needed, and make the frequency f of metallic cord I proper vibration
2 machines-Δ f
Machine=f
1 machineThe response point that drives in the electromagnetic component with harmonic wave resonates.Another road of wave detector X output is as the output of the electric frequency variable response of this sensor.At this moment the mechanical vibration frequency f of sensor
1 machineBoth equaled the frequency-selecting frequency f
1, also equal the electrical activation frequency f
1 drivesThat is: f
1 machine=f
1=f
1 Drive=f
1, so f
1Can be defined as the dynamic frequency of operation of sensor negative sense.The dynamic frequency of operation f of state 2 sensor negative senses this moment
1Frequency f less than state 2 sensor quiescent points
2
State 3: when external force F acts on tested metal steel structure elastic angle Φ, acting on the two ends that link to each other prolongs on steel structure arm H and the steel structure arm J, and pass to angle micrometric displacement triangle and survey responsive part, the angle micrometric displacement variable quantity+ΔΦ of metallic elastic angular deformation will take place in this part, simultaneously also make the displacement of the lines of assistor K length also take place+the line micrometric displacement variable quantity of Δ L, be used to survey the responsive variable quantity that partly perceives metal steel structure elastic angle Φ+ΔΦ of angle micrometric displacement triangle detection that the metal steel structure elastic angle changes, this moment, metallic cord I was when cooperating angle micrometric displacement triangle to survey responsive part, the resonant frequency high-speed response dynamic angular tension force F of metallic cord I
2The variation of+Δ F, the angle tension force F of this dynamic change
2+ Δ F has determined the frequency f of metallic cord I dynamic vibration
2 machines+ Δ F
Machine=f
3 machines, resonator Y the electric frequency f of employing selectively
2+ Δ f
=f
3Electrical activation frequency f with driver Z
2 drive+ Δ f
Drive=f
3 driveBe used to detect the frequency f of metallic cord I dynamic vibration
2 machines+ Δ F
Machine=f
3 machinesThe output terminal of resonator Y link to each other with the input end of wave detector X, to finish the intrinsic mechanical vibration frequency signal f of metallic cord I
2 machines+ Δ f
Machine=f
3 machinesTo electric frequency signal f
2+ Δ f
=f
3Conversion.The electrical activation frequency f of the output terminal of wave detector X and driver Z
2 drive+ Δ f
Drive=f
3Under the excitation of driving, make metallic cord I obtain the vibration energy needed, and make the frequency f of metallic cord I proper vibration
2 machines+ Δ f
Machine=f
3 machinesThe response point that drives in the electromagnetic component with harmonic wave resonates.Another road of wave detector X output is as the output of the electric frequency variable response of this sensor.At this moment the mechanical vibration frequency f of sensor
3 machinesBoth equaled the frequency-selecting frequency f
3, also equal the electrical activation frequency f
3 driveThat is: f
3 machines=f
3=f
3 drive=f
3, so f
3Can be defined as the dynamic frequency of operation of sensor negative sense.The dynamic frequency of operation f of state 3 sensor forwards this moment
3Frequency f greater than state 2 sensor quiescent points
3
The theory structure block diagram that is used for the metallic cord formula pulse output type angle micro-displacement sensor that steel structure elastic angle detects as shown in Figure 2.
Mechanical part: with reference to terminal A is the reference position of fixing metal string I, and the sampling terminal B is the stressed sampling location of fixing metal string I, and metallic cord I is connected with reference between terminal A and the sampling terminal B.One end of C representative sensor angular flexibility linking arm; The other end of D representative sensor angular flexibility linking arm; G representative sensor shell; I represents the metallic cord device; Φ represents metal steel structure elastic angle to be detected; K represents assistor; E represents sampling portion; M measured angle probe.
Electric part: X represents wave detector; Y represents resonator; Z represents driver; W represents output port.
Steel structure elastic angle is a kind of sensor that the little variable of the angular flexibility of steel structure elastic angle is converted to the electrical quantity variable with metallic cord formula pulse output type angle micro-displacement sensor, and its mechanical part is by metallic cord I, formed with reference to terminal A, sampling terminal B, angular flexibility linking arm C, angular flexibility linking arm D, sensor outer housing G, assistor K, the E of sampling portion and measured angle probe M.Its electric part is by wave detector X, resonator Y, driver Z and output port W.
When this sensor is installed in the sampling position of detected metal steel structure elastic angle, metal steel structure elastic angle Φ is subjected to outer effect of wrestling, make metal steel structure elastic angle Φ produce flexible distortion angle micrometric displacement ± Φ, on linking arm C by this sensor and detected metal steel structure elastic angle and metallic cord I that linking arm D is delivered to this sensor, the transmittance process that this dynamic action is wrestled is realized by metal steel structure elastic angle Φ stress deformation.Because it is very little that the sectional area of metallic cord I is compared with the sectional area of detected metal steel structure elastic angle H, can ignore fully in the dispersion for acting force aspect unit angle tension force and the pressure.
The metallic cord I of sensor is F at reference angle tension force
2State the time, the metallic cord I that just is installed in metal steel structure elastic angle Φ is when external force is zero static position, the sensor of this moment is in the state of quiescent point, also be the duty that sensor is in the mechanical zero angular displacement, the frequency of the intrinsic mechanical vibration of the metallic cord I of setting sensor is f
2 machines, resonator Y electric frequency-selecting frequency be f
2And the electrical activation frequency of driver Z is f
2 driveAt this moment the mechanical vibration frequency f of sensor
2 machinesBoth equaled the frequency-selecting frequency f
2, also equal the electrical activation frequency f
2 drive, that is: f
2 machines=f
2=f
2 drive=f
2, so f
2Can be defined as the frequency of sensor quiescent point, as shown in Figure 2.Described sensor mechanical switching device structure comprises: fixed endpoint A is the reference position of metallic cord I, and the sampling terminal B is the stressed position of metallic cord I, and metallic cord I is connected between fixed endpoint A and the sampling terminal B.Metallic cord I and can being closely connected by little mobile sampling end points (B).C representative sensor and detected metal steel structure elastic angle linking arm; D representative sensor and detected metal steel structure elastic angle linking arm; G representative sensor shell; I represents metallic cord; Φ represents metal steel structure elastic angle to be detected.Shell G is supporting whole metallic cord relevant mechanical switching device and telecommunications conversion equipment, and described sensor telecommunications conversion device structure comprises: resonator Y, driver Z, wave detector X and output port W etc. partly organize institute and become.The output terminal of resonator Y is a wave detector X input end, and wave detector X output terminal is the input end of driver Z, also is the output of output port W.
Driver Z is connected with resonator Y, sensor is under the excitation of driver Z, make metallic cord I obtain the required energy of mechanical vibration, and the natural vibration frequency of metallic cord I and the response point of driver Z in the excitation harmonic component are resonated, driver Z carries out the selection of resonance to the excitation harmonic component.Resonator Y is connected with wave detector X, and resonator Y is converted to the mechanical vibration of metallic cord I natural frequency with electric signal frequently, and input wave detector X handles.The wave detector X other end that is connected with driver Z is connected with output load R.The signal one tunnel of wave detector X output is input to driver Z, and as the driving energy of metallic cord I vibration, another road is as the output terminal of this sensor electrical variable signal response.The resonance point of the metallic cord I of this sensor is to change along with the microvariations of mechanical steel structure elastic angle.
The steel structure elastic angle provided by the invention design philosophy of metallic cord formula pulse output type angle micro-displacement sensor, mechanical switch partly comprises: metallic cord I, be connected between fixed endpoint A and the sampling terminal B with reference to terminal A, sampling terminal B, metallic cord I, be closely connected with the metallic cord I and the end points (B) of movably sampling.Angular flexibility linking arm C, angular flexibility linking arm D, sensor outer housing G, assistor K, the E of sampling portion and measured angle probe M form.Can finish outer wrestling for the function passes of mechanical angle deformation chord resonance.Electric part comprises it being by wave detector X, resonator Y, driver Z and output port W, can finish the electrical variable in function variable conversion position with mechanical perception, reaches the purpose of output.
It is characterized in that: fixed endpoint A is the reference position of metallic cord I, the sampling terminal B is the stressed position of metallic cord I, metallic cord I is connected between fixed endpoint A and the sampling terminal B, and cooperate with assistor K by the E of sampling portion, resonator Y and driver Z are positioned at the top of this strip metal string I, and are keeping constant utmost point near-earth perceived distance.The input end of the output terminal of resonator Y and wave detector X directly is electrically connected, and the output terminal of wave detector X should join with the input end of driver Z.
The driver Z of electric part is connected at resonator Y, and various piece adopts a common ground, and this sensor makes metallic cord I that resonant vibration take place under the excitation of driver Z drives.The natural vibration frequency resonance of drive components in excitation this moment and metallic cord, resonant frequency device Y carries out the selection of resonance to the harmonic component that driver Z drives in the excitation, then stabilizes to the mechanical sinusoidal vibration of resonance qualitly on metallic cord I.Resonance frequency selection circuit Y is connected with wave detector X, and the resonator Y vibration that metallic cord I is intrinsic is converted to sinusoidal wave electric signal frequently, and the input wave detector is handled.Wave detector X is connected with driver Z, and the other end links to each other with output port W.Signal one road enter drive Z of wave detector X output is as the driving energy of metallic cord I vibration.Another road is as the output terminal of this sensor electrical variable signal response.The mechanical resonance point of this sensor metal string I is that the variation with mechanical steel structure elastic angle Φ changes.
Transitive relation among Fig. 1 between the physical descriptor 1,2,3 is as follows:
1, state one function corresponding relation:
The angular displacement of Φ 1=Φ 2-ΔΦ reduces;
L1=L2-Δ L displacement of the lines reduces;
F1=f2-Δ f output frequency reduces.
2, state two function corresponding relations:
Φ 2=Φ 2 static benchmark angles;
The static basis displacement of L2=L2;
The static reference frequency of f2=f2.
3, state three function corresponding relations:
The angular displacement of Φ 3=Φ 2+ ΔΦ strengthens;
L3=L2+ Δ L displacement of the lines strengthens;
F3=f2+ Δ f output frequency strengthens.
Claims (4)
1, a kind of angle micro-displacement sensor that is used to detect the metallic cord formula pulse output type of steel structure elastic angle, it is characterized in that: an end of a metallic cord (I) is fixed on reference on the end points (A), and links to each other with an end of sampling portion (E) by linking arm (C); The other end of metallic cord (I) be fixed on can little mobile sampling end points (B) on, and link to each other with the other end of sampling portion (E) by corresponding linking arm (D), sampling portion (E) and assistor (K) join.
2, be used to detect the angle micro-displacement sensor of the metallic cord formula pulse output type of steel structure elastic angle according to claim 1, its feature also is: an end that is used to detect the resonator (Y) of metallic cord (I) vibrational state is connected with wave detector (X), and the other end of resonator (Y) is connected with an end of driver (Z); An end that is used to extract the wave detector (X) of resonator (Y) electric signal is connected with the other end of driver (Z), and this end of wave detector (X) is connected with external circuit as output simultaneously; Wave detector (X), resonator (Y) and driver (Z) are converted to the resonant frequency electric weight with the mechanical resonance amount.
3, a kind of measuring method of angle micro-displacement sensor of the metallic cord formula pulse output type that is used to detect steel structure elastic angle, it is characterized in that: the metallic cord of sensor (I) be fixed on reference to end points (A) and can little mobile sampling end points (B) between, with reference to the linking arm (D) of the linking arm (C) of end points (A) and sampling end points (B) be fixed on sampling portion (E) above, and closely cooperate with assistor (K), the steel structure arm (H) that direct and detected steel structure elastic angle two ends, the two ends of assistor (K) prolong links to each other with steel structure arm (J), detect the sampling section of metal steel structure elastic angle (Φ), metallic cord (I) and with reference to end points (A), sampling end points (B) closely cooperates on technology; Connection measured angle probe (M) below sampling portion (E), described measured angle probe (M) plays the role of positioning when measuring; Described metallic cord (I), sampling portion (E) also constitute angle micrometric displacement triangle with assistor (K) and survey responsive part;
When no external force (F) acts on continuous two ends prolongation steel structure arm (H) of tested metal steel structure elastic angle (Φ) and steel structure arm (J), angle micrometric displacement triangle is surveyed the angle micrometric displacement that metal deformation does not take place responsive part, thereby the angle micrometric displacement triangle of surveying metal steel structure elastic angle (Φ) variation is surveyed the variable quantity that responsive part does not have perception metal steel structure elastic angle (Φ) yet, metallic cord this moment (I) is cooperating angle micrometric displacement triangle to survey responsive part, is keeping basic dwell angle tension force (F
2), this basic dwell angle tension force (F
2) determined the frequency (f of the intrinsic static vibration of metallic cord (I)
2 machines), the electric frequency (f that employs selectively of resonator (Y)
2) and the electrical activation frequency (f of driver (Z)
2 drive);
When external force (F) acts on tested metal steel structure elastic angle (Φ), acting on the two ends that link to each other prolongs on steel structure arm (H) and the steel structure arm (J), and pass to angle micrometric displacement triangle and survey responsive part, the angle micrometric displacement variable quantity (± ΔΦ) of metallic elastic angular deformation will take place in this part, simultaneously also make the displacement of the lines of assistor (K) length that the line micrometric displacement variable quantity of (± Δ L) also takes place, be used to survey the responsive variable quantity that partly perceives metal steel structure elastic angle (Φ ± ΔΦ) of angle micrometric displacement triangle detection that the metal steel structure elastic angle changes, when metallic cord this moment (I) is surveyed responsive part at cooperation angle micrometric displacement triangle, the resonant frequency high-speed response dynamic angular tension force (F of metallic cord (I)
2± Δ F) variation, the angle tension force (F of this dynamic change
2+ Δ F) determined the frequency (f of metallic cord (I) dynamic vibration
2 machines± Δ f
Machine), the electric frequency (f that employs selectively of resonator (Y)
2± Δ f
) and the electrical activation frequency (f of driver (Z)
2 drive± Δ f
Drive) variation.
4, as the measuring method of the angle micro-displacement sensor of the metallic cord formula pulse output type that is used to detect steel structure elastic angle as described in the claim 3, it is characterized in that: the frequency (f that is used to detect metallic cord (I) dynamic vibration
2 machines± Δ f
Machine) the output terminal of resonator (Y) link to each other with the input end of wave detector (X), to finish the intrinsic mechanical vibration frequency signal (f of metallic cord (I)
2 machines± Δ f
Machine) to electric frequency signal (f
2± Δ f
) conversion; The output terminal of wave detector (X) links to each other with the input end of driver (Z), at its electrical activation frequency (f
2 drive± Δ f
Drive) driving under, make metallic cord (I) obtain the vibration energy needed, and make the frequency (f of metallic cord (I) proper vibration
2 machines± Δ f
Machine) drive resonance point response in the electromagnetic component with harmonic wave; Another road of wave detector (X) output is as the output of the electric frequency variable response of this sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100968854A CN101275858B (en) | 2008-05-08 | 2008-05-08 | Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100968854A CN101275858B (en) | 2008-05-08 | 2008-05-08 | Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101275858A true CN101275858A (en) | 2008-10-01 |
| CN101275858B CN101275858B (en) | 2010-10-27 |
Family
ID=39995514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100968854A Expired - Fee Related CN101275858B (en) | 2008-05-08 | 2008-05-08 | Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101275858B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865324A (en) * | 2016-05-12 | 2016-08-17 | 全普光电科技(上海)有限公司 | Capacitance sensing device |
| CN110260835A (en) * | 2019-06-21 | 2019-09-20 | 天津理工大学 | A kind of method and device using intrinsic frequency measurement included-angle-changeable angle |
| CN113433213A (en) * | 2021-07-05 | 2021-09-24 | 吉林大学 | Multi-trace high-sensitivity synchronous sensing device and method based on multi-modal internal resonance |
| CN114088120A (en) * | 2022-01-21 | 2022-02-25 | 成都宏明电子股份有限公司 | Composite displacement sensor with bidirectional linear displacement and angular displacement detection functions |
-
2008
- 2008-05-08 CN CN2008100968854A patent/CN101275858B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865324A (en) * | 2016-05-12 | 2016-08-17 | 全普光电科技(上海)有限公司 | Capacitance sensing device |
| CN105865324B (en) * | 2016-05-12 | 2019-02-01 | 全普光电科技(上海)有限公司 | Capacitive sensing apparatus |
| CN110260835A (en) * | 2019-06-21 | 2019-09-20 | 天津理工大学 | A kind of method and device using intrinsic frequency measurement included-angle-changeable angle |
| CN110260835B (en) * | 2019-06-21 | 2021-03-16 | 天津理工大学 | Method and device for measuring variable included angle by using natural frequency |
| CN113433213A (en) * | 2021-07-05 | 2021-09-24 | 吉林大学 | Multi-trace high-sensitivity synchronous sensing device and method based on multi-modal internal resonance |
| CN114088120A (en) * | 2022-01-21 | 2022-02-25 | 成都宏明电子股份有限公司 | Composite displacement sensor with bidirectional linear displacement and angular displacement detection functions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101275858B (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1728058B1 (en) | Load cell including displacement transducer, and associated methods of use and manufacture | |
| Kubba et al. | A micro-capacitive pressure sensor design and modelling | |
| US7454978B2 (en) | Versatile strain sensor employing magnetostrictive electrical conductors | |
| RU2305261C2 (en) | Method and device for measuring mechanical stress and longitudinal deformation | |
| CN105277297B (en) | Has balanced force snesor | |
| CN101275858B (en) | Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof | |
| CN104697677B (en) | A kind of piezomagnetic strain gauge | |
| CN103551922A (en) | Strain gauge integrated three-dimensional turning force sensor | |
| Elbestawi | Force measurement | |
| CN112888912A (en) | Strain measurement structure with structured bearing | |
| CN103245819A (en) | Method for measuring direct current or direct voltage by adopting magnetic excitation resonant piezoresistive cantilever beam | |
| US7705583B2 (en) | Micro-electromechanical system (MEMS) based current and magnetic field sensor | |
| CN201199163Y (en) | Micro-angular displacement sensor for detecting steel elastic angle | |
| CN105277109B (en) | Displacement sensor outputting digital frequencies | |
| Feng et al. | Research progress of mechanical vibration sensors | |
| CN110441551B (en) | Atomic force probe type sensor based on quartz ring resonator | |
| Krantz et al. | Project update: applied research on remotely queried embedded microsensors | |
| CN201199164Y (en) | Metallic cord type pulse output type sensor for detecting elastic micro-change displacement amount of steel body | |
| CN109115136A (en) | Angle micro-displacement sensor | |
| CN104697679B (en) | A kind of inductance type strain gauge | |
| CN204404986U (en) | A kind of electronic installation for installing current vortex sensor probe | |
| CN208902079U (en) | Precision actuation displacement measuring device | |
| CN113588149A (en) | Flexible multi-mode touch sensor combining silicon-based MEMS unit and coil array | |
| CN207066658U (en) | Type vibration wire anchor dynamometer | |
| CN100464175C (en) | Metal filmtype pulse output type steel body elastic micro variable sensor and its measuring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHAO LIANG Free format text: FORMER OWNER: WUXI KANGHUA STEEL STRUCTURE SAFETY TECHNOLOGY CO., LTD. Effective date: 20120321 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214142 WUXI, JIANGSU PROVINCE TO: 100080 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120321 Address after: 100080 7 gate 96, 501 East Zhongguancun Road, Beijing, Haidian District Patentee after: Zhao Liang Address before: 214142 Jiangsu province Wuxi New Area Shuofang Airport Industrial Park No. 9 Zheng Tong Patentee before: Wuxi Kanghua Steel Structure Safety Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20140508 |