CN113776572A - Reinforcing structure, detection assembly and detection assembly reinforcing method - Google Patents
Reinforcing structure, detection assembly and detection assembly reinforcing method Download PDFInfo
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- CN113776572A CN113776572A CN202110875945.8A CN202110875945A CN113776572A CN 113776572 A CN113776572 A CN 113776572A CN 202110875945 A CN202110875945 A CN 202110875945A CN 113776572 A CN113776572 A CN 113776572A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 92
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 230000001133 acceleration Effects 0.000 claims description 25
- 230000001681 protective effect Effects 0.000 claims description 16
- 238000005728 strengthening Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000005284 excitation Effects 0.000 description 15
- 239000012530 fluid Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008713 feedback mechanism Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The invention relates to the technical field of detection elements and discloses a reinforcing structure, a detection assembly and a detection assembly reinforcing method, wherein the reinforcing structure is used for a sensor, the sensor is arranged on the outer side of the pipe wall of a pipeline to be detected, a measurement section of the sensor is inserted into the pipeline to be detected, and the reinforcing structure comprises: and the clamping assembly is arranged on the outer side of the pipe wall of the pipeline to be measured and corresponds to the measuring section of the sensor, and the clamping assembly is used for adjusting the clamping degree of the measuring section when the amplitude signal of the sensor exceeds a preset range. According to the reinforcing structure, the detection assembly and the detection assembly reinforcing method provided by the invention, the clamping assembly is arranged to apply clamping force to the sensor, so that the natural frequency of the sensor can be adjusted, the clamping degree of the clamping assembly is further adjusted according to the amplitude signal of the sensor to avoid resonance, the natural frequency of the plug-in sensor can be effectively adjusted in a self-adaptive manner, resonance avoidance in a wider range is realized, and the application of the plug-in sensor in a specific environment can be realized.
Description
Technical Field
The invention relates to the technical field of detection elements, in particular to a reinforcing structure, a detection assembly and a detection assembly reinforcing method.
Background
When measuring physical parameters of the flowing working medium in the pipeline, the plug-in sensor represented by a thermometer is used for measuring the physical parameters of the flowing working medium in the pipeline, such as temperature and the like, by penetrating the measuring section into the pipeline. In actual measurement, working medium may flow around the measuring section of the plug-in sensor, and flow interference in forms of karman vortex street and the like occurs, so that unsteady pulsating fluid excitation force with a certain frequency occurs, and the frequency of the unsteady pulsating fluid excitation force is in positive correlation with the flow speed of the flowing working medium. The unsteady pulsating fluid excitation force acts on the plug-in sensor, which causes the plug-in sensor to deform and vibrate.
The general plug-in sensors have fixed natural frequencies, if the excitation frequency of the unsteady pulsating fluid excitation force is very close to the natural frequency of the plug-in sensor, a resonance phenomenon occurs, so that the plug-in sensor is subjected to huge alternating stress, and breakage caused by resonance may occur, so that the problem of resonance needs to be considered when the plug-in sensor is used, and the resonance phenomenon needs to be avoided in use, which is reflected in relevant standards.
In practical situations, the flow velocity in the pipeline may change drastically, and it is difficult to completely avoid the resonance problem of the insertion sensor in the design.
Disclosure of Invention
The invention provides a reinforcing structure, a detection assembly and a detection assembly reinforcing method, which are used for solving the defect that the resonance problem of an insertion type sensor in the prior art is difficult to avoid and realizing the purpose of avoiding resonance in a wide range.
The invention provides a reinforcing structure for a sensor, wherein the sensor is arranged on the outer side of the pipe wall of a pipeline to be measured, a measuring section of the sensor is inserted into the pipeline to be measured, and the reinforcing structure comprises: the clamping assembly is arranged on the outer side of the pipe wall of the pipeline to be measured and at the corresponding position of the measuring section of the sensor, and the clamping assembly is used for adjusting the clamping degree of the measuring section when the amplitude signal of the sensor exceeds a preset range.
According to the reinforcing structure provided by the invention, the clamping assembly comprises a pair of clamping jaws and a driving part connected with the clamping jaws, the clamping jaws are arranged on two sides of the measuring section, and the driving part is used for driving the clamping jaws to clamp or unclamp.
According to the reinforcing structure provided by the invention, one side of the clamping jaw, which faces the measuring section, is provided with a flexible layer.
According to the reinforcing structure provided by the invention, the reinforcing structure further comprises a protective shell, the protective shell is covered on the clamping assembly, and a through hole for the measurement section to pass through is formed in the protective shell.
According to the reinforcing structure provided by the invention, the reinforcing structure further comprises an acceleration sensor, wherein the acceleration sensor is connected to the sensor and is used for detecting the amplitude signal of the sensor.
According to the reinforcing structure provided by the invention, the reinforcing structure further comprises a controller, the driving piece and the acceleration sensor are respectively in signal connection with the controller, and the controller is used for controlling the driving piece to operate according to the amplitude signal detected by the acceleration sensor.
The invention also provides a detection assembly which comprises the reinforcing structure and a sensor, wherein the sensor comprises a connecting section, a measuring section and a mounting base, the first end of the connecting section is connected with the first end of the measuring section, the mounting base is provided with a through mounting hole, the second end of the measuring section penetrates through the mounting hole and is inserted into the to-be-detected pipeline, the connecting section is connected with the mounting base, the mounting base is mounted on the outer side of the pipe wall of the to-be-detected pipeline, and the reinforcing structure is arranged between the mounting base and the pipe wall of the to-be-detected pipeline.
According to the detection assembly provided by the invention, the first end of the connecting section is inserted into the mounting hole and is in threaded connection with the mounting base.
According to the detection assembly provided by the invention, the second end of the connecting section is provided with the limiting piece, and the limiting piece is used for blocking the second end of the connecting section from entering the mounting hole.
The invention also provides a detection assembly reinforcing method based on the reinforcing structure, wherein the detection assembly comprises a sensor, and the detection assembly reinforcing method comprises the following steps: monitoring an amplitude signal of the sensor during sensor detection; and when the amplitude signal of the sensor exceeds a preset range, adjusting the clamping degree of the measuring section of the sensor until the amplitude signal of the sensor is within the preset range.
According to the reinforcing structure, the detection assembly and the detection assembly reinforcing method provided by the invention, the clamping assembly is arranged to apply clamping force to the sensor, so that the natural frequency of the sensor can be adjusted, the clamping degree of the clamping assembly can be adjusted according to the amplitude signal of the sensor to avoid resonance, the natural frequency of the plug-in sensor can be effectively adjusted in a self-adaptive manner, resonance avoidance in a wider range is realized, and the application of the plug-in sensor in a specific environment can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of an arrangement of a detection assembly provided by the present invention;
FIG. 2 is a schematic view of the open state of the clamping assembly provided by the present invention;
fig. 3 is a schematic view of the clamping assembly provided by the present invention in a closed state.
Reference numerals:
1. a signal connection box; 2. a compression nut; 3. a connecting section; 4. mounting a base; 5. a protective shell; 6. a measuring section; 7. a tube wall; 8. an acceleration sensor; 9. a power line; 10. a signal output line; 11. a clamping jaw; 12. a drive member; 13. a reinforcing structure power supply line; 14. a flexible layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The reinforcing structure, the inspection unit, and the inspection unit reinforcing method of the present invention will be described below with reference to fig. 1 to 3.
The present embodiment provides a reinforcing structure for a sensor, wherein, referring to fig. 1, the sensor is installed outside a pipe wall 7 of a pipeline to be measured, and a measuring section 6 of the sensor is inserted into the inside of the pipeline to be measured. The measuring section 6 of the sensor is in contact with the fluid inside the pipeline to be measured, and relevant parameters of the fluid are detected. Referring to fig. 2, the reinforcing structure for a sensor includes: the clamping assembly is arranged on the outer side of the pipe wall 7 of the pipeline to be measured and at the position corresponding to the measuring section 6 of the sensor, and the clamping assembly is used for adjusting the clamping degree of the measuring section 6 when the amplitude signal of the sensor exceeds a preset range.
That is, the measuring section 6 of the sensor passes through the clamping assembly when inserted into the pipeline to be measured, so that the clamping assembly can clamp or loosen the corresponding part of the measuring section 6. The clamping assembly can be fixedly installed with the pipe wall 7 of the pipeline to be measured integrally, the corresponding position of the measuring section 6 of the sensor is clamped by applying force, and the clamping assembly can also be loosened to release the clamping force on the corresponding position of the measuring section 6. Furthermore, the natural frequency of the sensor can be adjusted by applying the change of the clamping force to the clamping degree of the measuring section 6 through the clamping component, so that the natural frequency is prevented from generating resonance with the fluid in the pipeline to be measured.
Specifically, the present embodiment provides that in the sensor detection process, the amplitude signal of the sensor can be detected and obtained, and whether there is a tendency of generating resonance is determined according to the amplitude signal. I.e. if resonance occurs, the amplitude signal of the sensor will increase. The preset range can be set, when the amplitude signal of the sensor is detected to exceed the preset range, the clamping assembly can be utilized to apply clamping force to the measuring section 6 and adjust the clamping degree, so that the natural frequency of the sensor is adjusted, the amplitude signal of the sensor is reduced to the preset range, and the occurrence of resonance is avoided.
According to the reinforcing structure provided by the embodiment, the clamping assembly is arranged to apply clamping force to the sensor, the natural frequency of the sensor can be adjusted, the clamping degree of the clamping assembly can be adjusted according to the amplitude signal of the sensor to avoid resonance, the natural frequency of the plug-in sensor can be effectively adjusted in a self-adaptive mode, resonance avoidance in a wide range is achieved, and the application of the plug-in sensor in a specific environment can be achieved.
On the basis of the above embodiment, further, referring to fig. 2, the clamping assembly includes a pair of clamping jaws 11 and a driving member 12 connected to the clamping jaws 11, the pair of clamping jaws 11 are disposed on two sides of the measuring section 6, and the driving member 12 is used for driving the clamping jaws 11 to clamp or unclamp. The clamping assembly comprises two clamping jaws 11, and the two clamping jaws 11 are driven by a driving part 12 to clamp or release the sensor measuring section 6. So that the clamping assembly has an open state and a closed state and can be switched between the open state and the closed state.
In particular, with reference to fig. 2, in the open condition of the clamping assembly, the two jaws 11 are separated, the two jaws 11 are not in contact with the measuring section 6 of the sensor, and there is no clamping force on the measuring section 6. Referring to fig. 3, in the closed state of the clamping assembly, the two jaws 11 are closed, and both jaws 11 are in contact with the measuring section 6 of the sensor, exerting a clamping force on the measuring section 6.
Further, the jaw 11 may be arc-shaped; facilitating mating contact with the surface of the measuring section 6. The driving piece 12 can drive one clamping jaw 11 to move to realize the separation or the closing of the two clamping jaws 11; the driving member 12 can also drive the two clamping jaws 11 to move simultaneously to separate or close the two clamping jaws 11. In particular, the driving member 12 may be a clamping jaw cylinder capable of driving the two clamping jaws 11 to move apart or close together simultaneously.
On the basis of the above-described embodiment, furthermore, the side of the clamping jaw 11 facing the measuring section 6 is provided with a flexible layer 14. The flexible layer 14 is made of a material that is somewhat flexible, such as hard rubber, so that when the measuring section 6 of the sensor is secured (see the closed position shown in fig. 3), it does not damage the measuring section 6, while providing some damping, which helps to reduce the amplitude of the sensor.
On the basis of the above embodiment, further, the reinforcing structure for the sensor further includes a protective shell 5, and the protective shell 5 is covered on the clamping assembly. The protective housing 5 is arranged at the periphery of the clamping jaw 11 and the driving part 12, plays a role in protection and protection, and the protective housing 5 is arranged, so that the reinforcing structure can be conveniently installed and fixed. The protective shell 5 is provided with a through hole for the measuring section 6 to pass through. The measuring section 6 can be inserted into the pipeline to be measured through the through hole and through the protective shell 5. Specifically, the through hole is correspondingly positioned between two clamping jaws 11 of the clamping assembly; so that the measuring section 6 is located between the two clamping jaws 11.
On the basis of the above embodiment, further, the reinforcing structure for a sensor further includes an acceleration sensor 8, and the acceleration sensor 8 is connected to the sensor and is used for detecting an amplitude signal of the sensor. The acceleration sensor 8 is connected with the sensor, so that the vibration of the sensor can be measured in real time, and the amplitude signal of the sensor can be obtained.
On the basis of the above embodiment, further, the reinforcing structure for a sensor further includes a controller, the driving element 12 and the acceleration sensor 8 are respectively connected to the controller through signals, and the controller is configured to control the driving element 12 to operate according to the amplitude signal detected by the acceleration sensor 8. Specifically, the controller is configured to control the operation of the driving member 12 to adjust the clamping degree of the clamping assembly on the measuring section 6 when the amplitude signal detected by the acceleration sensor 8 exceeds a preset range.
Specifically, the acceleration sensor 8 is connected with a power line 9 and a signal output line 10; the power line 9 is used for being connected with an external power supply to supply power to the acceleration sensor 8; the signal output line 10 is connected to the controller for sending the detected vibration signal to the controller. The controller can be arranged in the protective shell 5 of the reinforcing structure, and the controller is in signal connection with the driving part 12 and can be connected through a signal wire. The clamp assembly of the reinforcing structure is connectable to a reinforcing structure power cord 13, the reinforcing structure power cord 13 being connectable to an external power source for powering the controller and the driver 12.
On the basis of the above embodiments, further, the present embodiment provides a detection assembly, which includes the reinforcing structure described in any of the above embodiments, and referring to fig. 1, the detection assembly further includes a sensor, which includes a connection section 3, a measurement section 6, and a mounting base 4.
The first end of linkage segment 3 with the first end of measuring section 6 links to each other, be equipped with the mounting hole that runs through on the mounting base 4, the second end of measuring section 6 passes the mounting hole is inserted in the inside of awaiting measuring the pipeline, linkage segment 3 with mounting base 4 links to each other, mounting base 4 install in the pipe wall 7 outside of the pipeline that awaits measuring, additional strengthening locates mounting base 4 with between the pipe wall 7 of the pipeline that awaits measuring. The sensor can be fixed on the pipe wall 7 of the pipeline to be detected through the mounting base 4, so that the sensor is fixed, and detection and measurement of the sensor are facilitated.
And the reinforced structure is arranged between the mounting base 4 and the pipe wall 7 of the pipeline to be tested, and the reinforced structure can be compressed and fixed through the connection of the mounting base 4 and the pipe wall 7. And this setting structure of sensor for measuring section 6 has two positions of can fixing, and one is the position of being connected with linkage segment 3, and another is the position that corresponds with clamping component, and the interval sets up between these two positions of can fixing, and then can be more obvious through clamping component's the change natural frequency of measuring section 6, and better realization is to measuring section 6's fixed, in order to avoid resonating.
Further, a matched limiting structure is arranged between the reinforcing structure and the pipe wall 7 of the pipeline to be measured, or between the reinforcing structure and the mounting base 4. Limit structure can be recess lug structure etc. for example can set up the lug on mounting base 4, sets up the recess or the trompil of matching at the corresponding part of additional strengthening's protective housing 5, and then can be better the realization to additional strengthening's spacing fixed, guarantee to strengthen the effect.
On the basis of the above embodiment, further, the first end of the connecting section 3 is inserted into the mounting hole and is screwed with the mounting base 4. The first end of linkage segment 3 can be established to the external screw thread structure, and the mounting hole can be established to the internal thread structure, realizes that the fixed of linkage segment 3 and mounting base 4 links to each other through threaded connection, but and threaded connection convenient to detach installation.
On the basis of the above embodiment, further, a limiting member is disposed at the second end of the connecting section 3, and the limiting member is used for blocking the second end of the connecting section 3 from entering the mounting hole. Namely, the limiting member is located on one side of the mounting base 4 departing from the pipe wall 7 of the pipeline to be measured, and is used for limiting and fixing the measuring section 6 on the side of the mounting base 4.
Further, the acceleration sensor 8 may be connected to a limiting member to obtain an amplitude signal of the measurement section in real time. The sensor further comprises a signal connection box 1, which signal connection box 1 can be arranged at a second end of the connection section 3 for receiving a detection signal of the measurement section 6. The signal connection box 1 may have a housing in which elements for receiving signals are arranged. The acceleration sensor 8 can also be connected with the signal connection box 1, and the specific connection position is not limited, so that the purpose is to better reflect the amplitude signal of the sensor.
Specifically, the limiting member may be a protrusion disposed on the outer surface of the second end of the connecting section 3. The limiting part can also be a compression nut 2 arranged on the periphery of the second end of the connecting section 3; the second end of the compression nut 2 and the second end of the connecting section 3 can be integrally and fixedly connected, the outer surface of the compression nut 2 is in a nut shape, and the connecting section 3 can be conveniently installed or detached in an installation hole by the force applied by an operator. The limiting member may have other structures, and is not particularly limited.
Further, a gasket can be arranged between the limiting member and the surface of the mounting base 4, so that the connection between the connecting section 3 and the mounting hole can be better realized.
On the basis of the foregoing embodiments, further, the present embodiment provides a detection component reinforcing method, where the detection component includes a sensor, the detection component reinforcing method is based on the reinforcing structure described in any of the foregoing embodiments, and the detection component reinforcing method includes: monitoring an amplitude signal of the sensor during sensor detection; when the amplitude signal of the sensor exceeds a preset range, the clamping degree of the measuring section 6 of the sensor is adjusted until the amplitude signal of the sensor is within the preset range.
Specifically, the clamping force of the clamping assembly on the measuring section 6 is adjusted, and then the clamping degree on the sensor measuring section 6 is adjusted. Because the clamping degree of the measuring section 6 of the sensor is different, the sensor has different natural frequencies, therefore, the clamping component of the reinforcing structure provided by the embodiment does not only have two positions of opening and closing, but is a gradually changing process when switching between the two positions, so that the natural frequency of the measuring section 6 can be continuously changed in a larger range, rather than only realizing the specific natural frequency of the measuring section 6, and the application range of the sensor is favorably enlarged; the amplitude signal change of the sensor is also monitored during the process, and a suitable clamping position is finally determined.
I.e. the degree of clamping of the measuring section 6 of the sensor is gradually adjusted when the amplitude signal of the sensor exceeds a preset range. Adjusting the degree of clamping of the measuring section 6 of the sensor specifically comprises: the clamping of the measuring section 6 is gradually increased or the clamping of the measuring section 6 is gradually decreased. To ensure that the sensor ultimately has a natural frequency that does not resonate with the fluid.
On the basis of the above embodiments, further, the technical problem to be solved in this embodiment is to overcome the problem that the conventional plug-in sensor has a single resonance frequency and is difficult to avoid the resonance phenomenon in the full flow rate range of the pipeline flowing medium in some operating environments.
The technical scheme adopted by the embodiment is as follows: referring to fig. 1, taking a thermometer as an example, an acceleration sensor 8 is mounted on a thermometer compression nut 2 to measure the vibration of the thermometer in real time; further, an amplitude signal obtained by measurement of the acceleration sensor 8 is transmitted to the reinforcing structure controller through a vibration signal output line 10, a reinforcing structure closing device, namely a clamping assembly, is controlled to act, the fixing effect of the reinforcing structure closing device on the thermometer measuring section 6 is adjusted, and the inherent frequency of the thermometer is adjusted, so that the resonance phenomenon is avoided in a wide range;
further, when the thermometer does not resonate, the amplitude is weak, the reinforcing structure controller controls the reinforcing structure closing device to be in the opening position, as shown in fig. 2, no limitation is carried out on the thermometer, and the thermometer is in a safe state because the thermometer does not resonate; when the thermometer resonates, the amplitude is strong, the reinforcing structure controller controls the reinforcing structure closing device to be in a closing position, the flexible layer 14 compresses the thermometer measuring section 6 to provide a certain clamping force, a certain fixing effect is provided for the thermometer measuring section 6, the inherent frequency of the thermometer can be effectively improved and is higher than the fluid excitation frequency, and therefore the thermometer is guaranteed not to resonate, the amplitude is controlled within a safety range, and the whole measuring device is safe and reliable.
It should be noted that the clamping force is adjustable, so that the corresponding fixing effect is also adjustable, and the natural frequency increase of the thermometer is also controllable and adjustable. This control effect of clamp force adjustable can guarantee even have two excitation frequencies in flowing just, the thermometer natural frequency is close when one is in the open mode with additional strengthening closing device, when one is close with the thermometer natural frequency when additional strengthening closing device is in the tight closure state (the clamping effect of maximum dynamics promptly), can also make and be in a suitable dynamics through adjusting additional strengthening closing device clamp force, guarantees that thermometer natural frequency is in between two excitation frequencies, avoids resonance.
Referring to fig. 1, the adaptive reinforcing structure for avoiding resonance in a wide range provided by this embodiment includes an acceleration sensor 8, a vibration signal output line 10, a protective shell 5, a reinforcing structure controller, a reinforcing structure clamping assembly, and a flexible layer 14, where the acceleration sensor 8 is disposed on the thermometer gland nut 2, and the reinforcing structure closing device and the reinforcing structure controller are disposed between the mounting base 4 and the pipeline wall 7.
Referring to FIG. 2, the fluid excitation frequency is set to f within a certain flow rate range1Natural frequency of thermometer f0The resonance region is f0±df0(general desirable df)0<0.1f0). When the thermometer does not resonate, there is f1>f0+df0Or f1<f0-df0At the moment, the amplitude of the vibration of the thermometer is weak, the vibration signal measured by the acceleration sensor 8 is weak, the generated vibration signal current is small, and after the vibration signal current is transmitted to the reinforcing structure controller through the vibration signal output line 10, the reinforcing structure controller controls the reinforcing structure closing device to be at the opening position without any limitation on the thermometer, and at the moment, the thermometer is in a safe state because the thermometer does not resonate;
when the thermometer resonates, see FIG. 3, there is f0-df0<f1<f0+df0(general desirable df)0<0.1f0) At the moment, the amplitude of the thermometer vibration is strong, the vibration signal obtained by the acceleration sensor 8 through measurement is strong, the generated vibration signal current is large, after the vibration signal is transmitted to the reinforcing structure controller through the vibration signal output line 10, the reinforcing structure controller controls the reinforcing structure closing device to be in the closing position, the flexible layer 14 compresses the thermometer measuring section 6, a fixing effect is provided for the thermometer measuring section 6, the inherent frequency of the thermometer can be effectively changed, and the thermometer can be enabled to follow f0Is lifted to f2。
As shown in fig. 1, the reinforced structure closing device, i.e. the clamping component, is arranged between the mounting base 4 and the pipeline wall 7, so that when the reinforced structure closing device is in a closed position, the fixed position of the thermometer measuring section 6 is moved from the thermometer pressing thread to the reinforced structure closing device, the size of the cantilever section is greatly reduced, and the natural frequency of the thermometer is greatly increased. Taking a certain type of thermometer as an example, when the extending length of the measuring section 6 of the thermometer is 45mm, 50mm, 55mm and 60mm from the fixed end, the structural simulation result shows that the natural frequencies are respectively as follows: 3700Hz, 3000Hz, 2500Hz, 2150Hz, it can be found that the amount of change in the natural frequency is relatively large.
When the reinforcing structure closing device is in a closed position, different clamping forces can generate different fixing effects, and the fixing effect generated by the clamping force with the maximum force is similar to the fixing effect generated when the cantilever section of the thermometer is shortened to the reinforcing structure closing device, namely the inherent frequencies of the two parts are similar; the clamping force with the middle force is between the opening of the reinforcing structure closing device and the maximum clamping closing of the reinforcing structure closing device, and the natural frequency of the reinforcing structure closing device can be continuously adjusted.
Therefore, f can be realized by adjusting the reinforcing structure to enable the closing device to be in the closing position and setting a certain clamping force2>f0+df0And f is1<f2-df2(general desirable df)2<0.1f2). At the moment, the thermometer does not resonate any more, the vibration amplitude of the thermometer is greatly weakened, the vibration signal measured by the acceleration sensor 8 is weakened, the generated vibration signal current is reduced, after the vibration signal current is transmitted to the reinforcing structure controller through the vibration signal output line 10, the reinforcing structure controller controls the reinforcing structure closing device to be slightly loose, the clamping force is reduced, the fixing effect provided for the thermometer measuring section 6 is weakened, the inherent frequency of the thermometer is reduced, and the fluid excitation frequency f is closer to the fluid excitation frequency f1The amplitude is again enhanced.
The process forms a negative feedback mechanism, a balance state can be finally achieved, the reinforcing structure closing device is located at a closing position at the moment, a certain clamping force is provided, the thermometer does not have a strong resonance phenomenon, the amplitude is controlled within a safety range, and the whole measuring device is safe and reliable.
Another benefit of the control process is that when there are multiple excitation frequencies in the flow, such as two excitation frequencies, one near the natural frequency of the thermometer when the reinforcing structure closure device is in the open state and one near the natural frequency of the thermometer when the reinforcing structure closure device is in the closed state (i.e., the clamping effect of maximum force), it is still possible to ensure that the natural frequency of the thermometer is different from the excitation frequencies by feedback adjustment of the clamping force, avoiding resonance.
In another embodiment, it is also possible that the amplitude signal of the sensor exceeds a predetermined range when the clamping assembly is in the closed position, and that the natural frequency of the sensor is adjusted to be more distant from the excitation frequency of the fluid by gradually loosening the clamping assembly, i.e. by gradually reducing the clamping of the measuring section 6, so as to avoid resonance.
The embodiment provides a self-adaptive reinforcing structure capable of avoiding resonance in a wide range, and the self-adaptive reinforcing structure can effectively and self-adaptively adjust the natural frequency of the plug-in sensor, avoid resonance and realize the application of the plug-in sensor in a specific environment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a reinforced structure for the sensor, wherein, the sensor is installed in the pipe wall outside of the pipeline that awaits measuring, the measurement section of sensor insert to the inside of the pipeline that awaits measuring, its characterized in that, reinforced structure includes: the clamping assembly is arranged on the outer side of the pipe wall of the pipeline to be measured and at the corresponding position of the measuring section of the sensor, and the clamping assembly is used for adjusting the clamping degree of the measuring section when the amplitude signal of the sensor exceeds a preset range.
2. A reinforcing arrangement according to claim 1, wherein the clamping assembly comprises a pair of clamping jaws disposed on either side of the measuring section, and a drive member connected to the clamping jaws for driving the clamping jaws to clamp or unclamp.
3. A reinforcing arrangement according to claim 2, wherein the side of the clamping jaw facing the measuring section is provided with a flexible layer.
4. The reinforcing structure of any one of claims 1 to 3, further comprising a protective shell, wherein the protective shell is covered on the clamping assembly, and a through hole for the measuring section to pass through is formed in the protective shell.
5. The reinforcing structure of claim 2, further comprising an acceleration sensor connected to the sensor for detecting an amplitude signal of the sensor.
6. The reinforcing structure of claim 5, further comprising a controller, wherein the driving member and the acceleration sensor are respectively connected to the controller by signals, and the controller is configured to control the driving member to operate according to the amplitude signal detected by the acceleration sensor.
7. A detection assembly, characterized by, include the additional strengthening of any of above-mentioned claims 1-6, still include the sensor, the sensor includes linkage segment, measurement section and mounting base, the first end of linkage segment with the first end of measurement section links to each other, be equipped with the mounting hole that runs through on the mounting base, the second end of measurement section passes the mounting hole is inserted and is arranged in the inside of the pipeline that awaits measuring, the linkage segment with the mounting base links to each other, mounting base install in the pipe wall outside of the pipeline that awaits measuring, additional strengthening locates the mounting base with between the pipe wall of the pipeline that awaits measuring.
8. The detection assembly of claim 7, wherein the first end of the connecting segment is inserted into the mounting hole and is threadably coupled to the mounting base.
9. The detecting assembly according to claim 7, wherein the second end of the connecting section is provided with a stopper for stopping the second end of the connecting section from entering the mounting hole.
10. A method for reinforcing a sensing member, wherein the sensing member includes a sensor, based on the reinforcing structure of any one of claims 1 to 6, the method comprising:
monitoring an amplitude signal of the sensor during sensor detection;
and when the amplitude signal of the sensor exceeds a preset range, adjusting the clamping degree of the measuring section of the sensor until the amplitude signal of the sensor is within the preset range.
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