CN112556559B - Displacement and vibration monitoring device - Google Patents
Displacement and vibration monitoring device Download PDFInfo
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- CN112556559B CN112556559B CN202011376558.1A CN202011376558A CN112556559B CN 112556559 B CN112556559 B CN 112556559B CN 202011376558 A CN202011376558 A CN 202011376558A CN 112556559 B CN112556559 B CN 112556559B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a displacement and vibration monitoring device, which comprises a frame, a measuring mechanism and a sensing mechanism, wherein the measuring mechanism is arranged on the frame; the frame is arranged on the object to be detected; the measuring mechanism is arranged on the frame and can monitor the displacement parameter and the vibration parameter of the object to be measured; the sensing mechanism is arranged on the rack and comprises a telescopic component and a sensing piece; the telescopic assembly is contacted with the measuring mechanism and can move along with the action of the measuring mechanism. By applying the technical scheme of the invention and adopting the combination of the measuring mechanism and the sensing mechanism, the effect is as follows: the sensing mechanism is used for monitoring the vibration threshold of the object to be measured, so that the sensing mechanism controls the measuring mechanism to improve the sampling frequency of displacement, and the displacement parameter and the vibration parameter of the object to be measured can be effectively monitored in real time.
Description
Technical Field
The invention relates to the field of safety monitoring, in particular to a displacement and vibration monitoring device.
Background
In the field of structural object safety monitoring, the safety condition of a structural object is analyzed and judged mainly based on the change condition of a measurement parameter, the commonly used measurement parameter at present comprises displacement, stress, strain, inclination and the like, the monitoring on the vibration parameter of the structural object is lacked, and the vibration parameter can directly reflect the current safety condition of the structural object, so that the monitoring on the vibration parameter of the structural object is very important.
Chinese patent CN201820281740.0 discloses an integral type slope monitoring stake based on big dipper satellite navigation system, its displacement parameter that comes the real-time supervision structure through the removal condition of location antenna, and this patent has only utilized big dipper location most basic space displacement measurement function, lacks the monitoring to structure vibration parameter, and the practicality is not strong.
In view of the above, there is a need for a monitoring device capable of monitoring displacement and vibration of a structure to solve the above problems.
Disclosure of Invention
The invention aims to provide a monitoring device capable of monitoring displacement parameters and vibration parameters of an object (structure) to be detected, and the specific technical scheme is as follows:
a displacement and vibration monitoring device comprises a sensing mechanism, a measuring mechanism and a frame; the frame is arranged on the object to be detected; the measuring mechanism is arranged on the rack and used for monitoring the displacement parameter and the vibration parameter of the object to be measured; the sensing mechanism is arranged on the rack and used for triggering the measuring mechanism to improve the sampling frequency of displacement, the sensing mechanism comprises a telescopic assembly and a sensing piece, the telescopic assembly is in contact with the measuring mechanism, the sensing piece is arranged on the telescopic assembly, and the telescopic assembly and the sensing piece on the telescopic assembly can move along with the movement of the measuring mechanism.
Preferably, the telescopic assembly comprises a support, a connecting rod and an elastic piece; the support is arranged on the frame; the connecting rod is movably arranged on the support, and one end of the connecting rod is contacted with the measuring mechanism; the elastic piece is sleeved on the connecting rod, one end of the elastic piece is connected with the connecting rod, and the other end of the elastic piece is contacted with the support and/or the rack; the induction piece comprises a first induction single piece and a second induction single piece; the first induction single piece is arranged on the support; the second induction single piece is arranged on the connecting rod and matched with the first induction single piece to trigger the measuring mechanism to improve the sampling frequency of the displacement of the object to be measured.
Preferably, in the above technical solution, the sensing mechanism further includes a weight member and a limiting member; the counterweight is arranged on the connecting rod; one end of the limiting part is arranged on the support, and the other end of the limiting part is connected with the connecting rod and can limit the connecting rod.
Preferably, the measuring mechanism comprises a positioning piece, a receiving piece, a rotating disc and a power unit arranged on the rack; the positioning piece is arranged on the turntable; the rotary table is connected with the power unit and can rotate; the receiving piece is used for receiving the position information of the positioning piece.
Preferably, the turntable is provided with at least one group of limiting grooves; the spacing of carousel can be realized with the contact of flexible subassembly to the spacing groove.
Preferably, the power unit comprises a power part, a gear set and an escapement mechanism; the power part is arranged on the frame; the gear set is respectively connected with the power part and the turntable and is used for transmitting power; the escapement mechanism cooperates with the gear set for controlling the rotational speed of the gear set.
Preferably, in the above technical solution, the power unit further includes a clutch; the clutch is respectively connected with the gear set and the power part and used for controlling the power output of the power part.
The technical scheme of the invention has the following beneficial effects:
(1) the monitoring device comprises a frame, a measuring mechanism and a sensing mechanism; the frame is arranged on the object to be detected; the measuring mechanism is arranged on the frame and can monitor the displacement parameter and the vibration parameter of the object to be measured; the sensing mechanism is arranged on the rack and comprises a telescopic component and a sensing piece; the telescopic assembly is in contact with the measuring mechanism and can move along with the action of the measuring mechanism; the sensing part is arranged on the telescopic component, an acceleration is given to the telescopic component when the object to be measured vibrates, the telescopic component and the sensing part are driven to act, the sensing part triggers the measuring mechanism to improve the sampling frequency of the displacement of the object to be measured, the acquisition of vibration parameters is realized, and on the premise of reducing power consumption, the displacement and the vibration parameters of the object to be measured can be monitored; the sensing mechanism is mechanically matched with the measuring mechanism, the sensing mechanism is used for sensing the vibration of the object to be measured (when the vibration of the object to be measured reaches a threshold value, a telescopic component of the sensing mechanism is separated from the measuring mechanism in a contact mode), the measuring mechanism is matched to monitor vibration parameters, and the phenomenon that the electromagnetic signal interferes with a device due to circuit design to cause misjudgment is avoided.
(2) The telescopic assembly comprises a support, a connecting rod and an elastic piece; the connecting rod acts, the second sensing single piece arranged on the connecting rod is separated from the first sensing single piece arranged on the support, and the measuring mechanism connected (preferably in wireless connection) with the first sensing single piece improves the displacement sampling frequency of the object to be measured, so that the high-frequency acquisition requirement required by the measurement of the vibration parameters of the object to be measured is met. The sensing mechanism also comprises a counterweight part and a limiting part; the counterweight is arranged on the connecting rod, so that the telescopic assembly can conveniently monitor the vibration threshold of the object to be detected; the locating part can carry on spacingly to the connecting rod, has guaranteed that the connecting rod can be when vertical direction motion, can not take place radial deviation, and the practicality is strong. Here, preferably, the link includes a first link and a second link; the counterweight is arranged on the first connecting rod, so that the mounting space is reasonably utilized, and the counterweight can be quickly replaced; the second induction single piece is arranged on the first connecting rod and is convenient to be correspondingly matched with the first induction single piece arranged on the support; the second connecting rod is movably arranged on the support, the elastic piece (preferred spring) is sleeved on the second connecting rod, two ends of the elastic piece are respectively connected with the first connecting rod and the limiting piece (particularly the ejector pin seat of the limiting piece), the telescopic direction of the elastic piece is consistent with the motion direction of the second connecting rod, the radial deviation of the elastic piece is prevented, and the vibration of the object to be detected is convenient to monitor.
(3) The measuring mechanism comprises a positioning piece, a receiving piece, a rotating disc and a power unit; the carousel lower extreme is equipped with the spacing groove with flexible subassembly contact, breaks away from flexible subassembly when the carousel, and power pack drives the carousel uniform motion for in the position data of the setting element that receives the piece, have a known periodic law, the observation and the analysis of the data of being convenient for, the position information through the setting element is poor with the displacement value of setting element on the carousel, obtains the more accurate displacement and the vibration data of determinand. The measuring mechanism can also adopt the matching of a positioning piece (preferably a Beidou positioning antenna) and a receiving piece (preferably a Beidou receiver); the setting element sets up in the frame, flexible subassembly sets up in the frame, the determinand vibration gives flexible subassembly (specifically the connecting rod of flexible subassembly) a decurrent power, make the connecting rod downstream, make the first response singleton that sets up on the support and the second response singleton disconnection signal of setting on the connecting rod, receive the signal that the piece received first response singleton (here receive piece and response piece wireless connection, can carry out information transfer), improve the displacement sampling frequency to the determinand, realize obtaining of vibration parameter.
(4) When the vibration of the object to be tested does not reach the threshold set by the telescopic assembly, the second connecting rod can limit the rotary table through the limiting groove, when the vibration of the object to be tested reaches the threshold set by the telescopic assembly, the second connecting rod is separated from the limiting groove, and when the rotary table rotates to the next limiting groove, the second connecting rod is clamped into the next limiting groove again (when the second connecting rod is clamped into the next limiting groove from the rotation of the limiting groove, the receiving part quickly receives the displacement information of the positioning part), so that the situation that the rotary table continuously rotates to cause insufficient power of a power unit is avoided.
(5) The power unit of the invention comprises a power member (comprising a barrel, a spring knob and a rotating shaft), a gear set and an escapement mechanism; the power part drives the turntable to rotate, the escapement mechanism is matched with the gear set to control the turntable to move at a constant speed, so that the vibration parameters can be conveniently obtained and the observation of the vibration curve output based on the parameters can be conveniently realized. Preferably here, the power unit further comprises a clutch (preferably an overrunning clutch); the clutch is respectively connected with the gear set and the rotating shaft of the power part and used for controlling the rotation of the rotating shaft, so that the power part is prevented from influencing the gear set when storing force.
(6) The rack comprises a mounting base, a cylinder body, a glass fiber reinforced plastic cover and a cover plate; the stack shell sets up on the installation base, and the apron setting is at stack shell tip and installation base cooperation, makes the stack shell form a cavity that is used for the part installation, and the structure is rigorous, and the stack shell is connected with the glass steel cover, can protect measuring mechanism, extension fixture life.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In the drawings:
fig. 1 is a sectional view of a monitoring device of the present embodiment; (receiving parts not shown)
FIG. 2 is a schematic illustration of the structure of the gear set of FIG. 1;
FIG. 3 is a schematic view of the sensing mechanism of FIG. 1;
FIG. 4 is a schematic illustration of the power unit of FIG. 1;
wherein, 1, a sensing mechanism; 1.1, a telescopic component; 1.1.1, a support; 1.1.1.1, an upper support; 1.1.1.2, a lower support; 1.1.2, connecting rod; 1.1.2.1, a second connecting rod; 1.1.2.2, a first link; 1.1.3, an elastic piece; 1.2, an induction piece; 1.2.1, a first inductive singlet; 1.2.2. a second induction single piece; 1.3, a counterweight; 1.4, a limiting piece; 1.4.1, a thimble seat; 1.4.2, a thimble; 2. a measuring mechanism; 2.1, positioning parts; 2.2, a turntable; 2.2.1, a ring-shaped guide rail; 2.2.2, plane ball bearing; 2.2.3, a metal feeler lever; 2.3, a power unit; 2.3.1, a power part; 2.3.1.1, respectively; a barrel; 2.3.1.2, spiral spring; 2.3.1.3, a rotating shaft; 2.3.2, gear set; 2.3.2.1, a first gear; 2.3.2.2, a second gear; 2.3.2.3, a third gear; 2.3.3, escapement; 2.3.3.1, escape wheel; 2.3.3.2, respectively; a balance spring assembly; 2.3.4, clutch; 3. a frame; 3.1, installing a base; 3.2, a cylinder body; 3.3, a glass fiber reinforced plastic cover; 3.4, a cover plate; 3.4.1, ring-shaped metal ring.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The embodiment is as follows:
a displacement and vibration monitoring device comprises a sensing mechanism 1, a measuring mechanism 2 and a frame 3; as shown in fig. 1-4. The method comprises the following specific steps:
the frame 3 comprises a mounting base 3.1 (preferably a round base plate), a cylinder body 3.2 (round), a glass fiber reinforced plastic cover 3.3 and a cover plate 3.4; as shown in fig. 2; the mounting base is provided with a plurality of groups of waist-shaped holes and is mounted on the object to be tested through the waist-shaped holes; the lower end face of the cylinder body is arranged on the mounting base, the upper end face of the cylinder body is provided with a cover plate 3.4, and the cover plate is matched with the mounting base to enable the cylinder body to form a cavity for mounting the sensing mechanism and the measuring mechanism (particularly a power unit 2.3 of the measuring mechanism 2); the measuring mechanism (specifically, the positioning part 2.1 and the turntable 2.2) is arranged on the cover plate, and a glass fiber reinforced plastic cover for protecting and sealing the measuring mechanism is arranged on the cover plate (the glass fiber reinforced plastic cover can allow electromagnetic waves to pass through, and the specific model and the material refer to the prior art).
the structure of the telescopic assembly is specifically as follows: the telescopic assembly 1.1 comprises a support 1.1.1, a connecting rod 1.1.2 and an elastic piece 1.1.3, the support 1.1.1 comprises an upper support 1.1.1 and a lower support 1.1.1.2, the upper support and the lower support are connected through a connecting plate, and the lower support is arranged on the rack (preferably on the mounting base); the connecting rod comprises a first connecting rod and a second connecting rod (the shapes of the first connecting rod and the second connecting rod are preferably circular), one end of the first connecting rod is vertically connected with the second connecting rod, and a counterweight part and a sensing part are arranged at the other end of the first connecting rod; one end of the second connecting rod is inserted into the through hole of the upper support and movably arranged in the through hole, and the end part of the second connecting rod passes through the through hole arranged on the cover plate to be contacted with the measuring mechanism, as shown in fig. 3; the elastic piece (preferably a spring) is sleeved on the second connecting rod, one end of the elastic piece is connected with the first connecting rod, and the other end of the elastic piece is connected with the limiting piece. The second connecting rod, the elastic element and the limiting element are preferably arranged on the same central axis.
The structure of response piece is specifically: the sensing piece 1.2 (such as a normally open hall sensor) comprises a first sensing single piece 1.2.1 and a second sensing single piece 1.2.2; the first sensing singleton is arranged on the upper support 1.1.1.1 and is connected (preferably wirelessly) to the receiving element of the measuring device, and the second sensing singleton is arranged on the first connecting rod and vertically corresponds to the first sensing singleton arranged on the upper support. The counterweight (such as a wood block) is arranged on the first connecting rod, so that the telescopic length of the elastic part can be conveniently adjusted.
The structure of the limiting part is specifically as follows: the limiting piece 1.4 comprises a thimble seat 1.4.1 and a thimble 1.4.2, as shown in fig. 3; the thimble seat is circular (the upper end of the thimble seat is provided with a groove capable of accommodating the elastic element), the outer wall of the thimble seat is provided with external threads, the lower support is provided with a mounting hole capable of accommodating the thimble seat, and the mounting hole is internally provided with internal threads matched with the external threads; the thimble seat is adjustably arranged on the lower support through thread matching (the position of the thimble seat on the lower support is adjusted through thread matching, so that the telescopic length of the elastic part is conveniently adjusted); one end of the ejector pin is arranged on the ejector pin base, and the other end of the ejector pin is inserted into the second connecting rod (the second connecting rod is provided with a blind hole capable of containing the ejector pin).
The measuring mechanism 2 has two schemes:
the first method is as follows: measuring mechanism includes setting element (like big dipper location antenna) and receives the piece (like big dipper receiver, and external power source is connected to big dipper receiver, and receives the piece and can transmit information to terminal equipment), and the setting element setting is in the frame, receives the positional information that the setting element was received to piece (receiving the piece and being connected with perception mechanism's response piece), specifically is: the setting element sets up on the apron of frame, and the acceleration that the determinand vibration produced gives telescopic assembly's connecting rod decurrent effort, and the connecting rod downstream makes the first response singleton that sets up on connecting rod (specifically first connecting rod) and the second response singleton disconnection signal of setting on telescopic assembly's support, and the receiving piece receives the signal of first response singleton, improves the sampling frequency to the displacement of determinand, acquires the vibration parameter of determinand.
The second method is as follows: the measuring mechanism comprises a positioning piece 2.1, a receiving piece, a rotating disc 2.2 and a power unit 2.3, as shown in figure 2; the positioning piece is arranged on the turntable, the turntable is in a circular ring shape, the lower end of the circular ring is circumferentially provided with an annular guide rail 2.2.1 (preferably, the guide rail is a groove with a smooth groove surface), at least one group of limiting grooves are arranged on the bottom surface of the annular guide rail (preferably, six groups of limiting grooves are circumferentially arranged on the bottom surface of the annular guide rail at equal intervals, and the depth of the limiting grooves is selected according to actual requirements); the end part of the second connecting rod is contacted with the limiting groove to limit the turntable; the power pack sets up in the stack shell and is connected with the carousel, can drive the carousel and rotate, specifically is: the turntable also comprises two groups of cross beams, the cross beams are connected with the inner side wall of the circular ring, and the intersection part of the cross beams and the circular ring have the same central axis; a through hole is formed in the center of a cover plate 3.4 of the rack, and a power output shaft of the power unit penetrates through the through hole to be connected with the intersection position of the two groups of cross beams and can drive the rotary table and a positioning piece arranged on the rotary table to rotate. Preferably, the lower end of the cross beam is provided with a plane ball 2.2.2, which is convenient for the rotary disc to rotate on the cover plate.
Preferably, the connection mode of the positioning element and the receiving element is as shown in fig. 2: the lower extreme of crossbeam is equipped with metal feeler lever 2.2.3, the upper surface of apron 3.4 is equipped with the metal coating who corresponds with the metal feeler lever, metal coating is preferred to be annular becket 3.4.1, and the metal feeler lever can contact with annular becket (the crossbeam can keep contacting with annular becket rotating in-process metal feeler lever), and the setting element passes through line connection metal feeler lever, and the piece of receiving passes through line connection annular becket, can realize carrying out information transfer between piece and the setting element, has solved the carousel simultaneously and has rotated the circuit winding problem that the in-process probably appears. The metal touch rod is preferably arranged at the contact position of the metal touch rod and the metal coating, so that the influence on the rotation of the turntable can be avoided while the contact of the metal touch rod and the metal coating is ensured.
The power unit 2.3 includes a power member 2.3.1, a gear set 2.3.2, an escapement mechanism 2.3.3 and a clutch 2.3.4, as shown in fig. 1-2, as follows:
the structure of the power part is specifically as shown in fig. 1: the power element comprises a barrel 2.3.1.1, a spring turn 2.3.1.2 and a rotating shaft 2.3.1.3; the clockwork spring in the clockwork spring box is connected with the rotation shaft, clutch 2.3.4 (preferred freewheel clutch) connect gear train and rotation axis respectively, tighten up the clockwork spring through clockwork spring turn-knob rotation, and the clutch cooperates the clockwork spring to hold power for the rotation of rotation axis, guarantees to hold power in-process rotation axis and can not drive the gear train rotatory, causes the influence to the gear train, and balanced rotational speed when the rotation axis is rotatory simultaneously guarantees the uniform velocity of rotation axis and rotates. The barrel structure is referred to the prior structure.
The structure of the gear set is specifically as follows: the gear set 2.3.2 includes a first gear 2.3.2.1, a second gear 2.3.2.2, and a third gear 2.3.2.3; the first gear is connected with the clutch and can be driven to move by matching the clutch with the rotating shaft; the second gear is meshed with the first gear, a power output shaft of the second gear is connected with the rotary table (particularly the intersection part of the rotary table cross beam), and the third gear is meshed with the second gear.
The specific connection relationships of the gear sets are as follows, as shown in fig. 4:
the second gear comprises two groups of second gear single pieces (a second gear A and a second gear B respectively), the two groups of second gear single pieces are connected through a connecting shaft, the first gear is meshed with the second gear A, and the second gear B is provided with a power output shaft for driving the turntable to rotate. The preferred gear ratio of the second gear a and the second gear B is here 3-7: 1.
The third gear comprises two groups of third gear single pieces (a third gear A and a third gear B respectively), the two groups of third gear single pieces are connected through a connecting shaft, and the third gear A is meshed with the second gear B. The gear ratio of the third gear a to the third gear B is preferably 3-7: 1.
The escapement mechanism is specifically configured as shown in fig. 4: said escapement 2.3.3 comprises an escape wheel 2.3.3.1, a pallet fork and a balance spring assembly 2.3.3.2; the escape wheel comprises two escape wheel single parts (escape wheel A and escape wheel B respectively); escape wheel A and escape wheel B pass through the connecting axle, and escape wheel B meshes with third gear B, and the first end (the one end that sets up into the tile and go out the tile) of pallet fork cooperates with escape wheel A, and the second end cooperates with balance hairspring subassembly (balance hairspring subassembly structure reference current structure), can realize the rotational speed control to the second gear, guarantees that the second gear can drive the carousel uniform rotation. The transmission ratio of escape wheel A and escape wheel B is 1: 3-7.
The monitoring device applying the embodiment specifically comprises:
firstly, setting a corresponding telescopic component according to an acceleration threshold of an object to be detected; when vibration occurs, the monitoring device changes from a static state to a vibration state, acceleration is generated in the change process, the acceleration causes the stress state of the connecting rod to change, when the acceleration occurs, the connecting rod is subjected to a downward force under the action of the acceleration, meanwhile, the connecting rod moves downwards and is subjected to two upward sliding friction forces, namely the sliding friction force of the connecting rod and the limiting groove and the sliding friction force of the connecting rod and the support (particularly an upper support), the connecting rod moves downwards to cause the elastic part to be pressed, upward elastic force is generated, and the analysis on the specific stress is shown in an expression 1):
in order to enable the connecting rod to leave the limiting groove under the action of acceleration and release the rotating disc to rotate, the stress of the connecting rod needs to satisfy expression 2):
G+F a ≥F k +f 1 +f 2 2)；
simultaneous expression 1) and expression 2), expression 3) is derived:
wherein:
g is the gravity of the connecting rod and the counterweight;
g is gravity acceleration;
a is the acceleration generated by the change of the monitoring device from a static state to a vibration state;
F a the acting force of the acceleration generated by the change of the monitoring device from a static state to a vibration state on the connecting rod is monitored;
F k is the elasticity of the elastic piece;
f 1 the sliding friction force of the connecting rod and the limiting groove is adopted;
f 2 the sliding friction force between the connecting rod and the support is adopted;
m is the mass of the connecting rod;
Δ m is the mass of the counterweight;
k is the elastic coefficient of the elastic member;
x 0 is the initial telescopic length of the elastic element;
Δ x is the displacement of the connecting rod completely leaving the limiting groove (i.e. the compression of the elastic element when the connecting rod completely leaves the limiting groove);
N 1 the pressure of the limiting groove on the connecting rod under the action of the driving force of the power unit is used;
N 2 the pressure of the support on the connecting rod under the action of the driving force of the power unit;
μ 1 the sliding friction coefficient of the limiting groove and the connecting rod is obtained;
μ 2 the sliding friction coefficient of the support and the connecting rod is obtained;
m is a stable moment given to the turntable by the power unit;
r is the distance between the middle point of the limiting groove and the rotating center of the turntable;
l is the distance from the contact point of the limiting groove and the connecting rod to the mass center of the connecting rod (particularly a second connecting rod) when the connecting rod slides;
l is the distance from the contact point of the support and the connecting rod to the mass center of the connecting rod (particularly a second connecting rod) when the connecting rod slides;
n is the ratio of the distance from the contact point of the limiting groove and the connecting rod to the mass center of the connecting rod (particularly the second connecting rod) during sliding to the distance from the contact point of the limiting groove and the connecting rod to the mass center of the connecting rod.
Combining expression 1), expression 2), and expression 3) yields: the acceleration required by the rotation of the release turntable is inversely proportional to the mass of the counterweight and directly proportional to the prepressing degree and the elastic coefficient of the elastic part; by adjusting the mass of the counterweight and the expansion amount of the elastic part or changing different elastic coefficients, different vibration thresholds of the object to be detected can be monitored.
Secondly, set up monitoring devices on the determinand, specifically be: a plurality of groups of waist-shaped holes are arranged on a frame of the monitoring device, corresponding mounting holes are arranged on the object to be detected, and the monitoring device is fixed on the object to be detected through fixing parts (such as bolts).
And finally, monitoring the displacement parameter and the vibration parameter:
for the case of a turntable, the following is specific:
when the acting force does not exceed the preset threshold value of the telescopic assembly, the sampling frequency of the receiving part on the displacement parameter of the positioning part is 5-10 min/time (the sampling frequency is set according to the actual requirement), and meanwhile, the telescopic assembly can limit the turntable through the limiting groove, so that the turntable can not rotate; when the exertion exceeds the threshold value of predetermineeing of flexible subassembly, the second connecting rod of flexible subassembly breaks away from the contact with measuring mechanism's carousel (second connecting rod drives first connecting rod downstream promptly), receive the piece and improve the sampling frequency to setting element displacement parameter to 0.01-1 s/time (when the second connecting rod rotates the card from the spacing groove and goes into next spacing groove, receive the displacement information of piece quick receipt setting element, the displacement data of the setting element that receives of receiving the piece do the difference with the displacement value of setting element, obtain the vibration parameter of determinand, it is as follows specifically to do poor rule:
suppose that the coordinates of the positioning element displacement data received by the receiver at a certain time t are: (x) a ，y a ) Because the rotation of the turntable is uniform rotation, the antenna displacement (delta x, delta y) caused by the rotation of the turntable can be calculated by the following formula (overlooking the turntable, taking the center of the turntable as the origin of coordinates, taking the distance from the positioning piece to the center of the turntable as rho, rotating the turntable counterclockwise, and keeping the angular velocity as omega):
Δx＝ρ·cosωt
Δy＝ρ·sinωt
the actual displacement value of the positioning element at a certain moment t, i.e. the vibration parameter (x) z ，y z ) Comprises the following steps:
x z ＝x a -ρ·cosωt
y z ＝y a -ρ·sinωt
in the formula:
(x a ，y a ) Absolute coordinates of the positioning piece displacement data at a certain moment t;
(Δ x, Δ y) are coordinate values of the positioning element displacement data at a certain time t added by the rotation of the disc;
ρ is the distance from the positioning piece to the center of the circle of the turntable;
omega is the angular speed of the rotation of the turntable;
(x z ，y z ) The vibration parameters of the object to be measured are the real coordinates of the object to be measured in the vibration process.
For the case without a turntable, the following is specific:
when the acting force does not exceed the preset threshold value of the telescopic assembly, the sampling frequency of the receiver on the displacement parameters of the positioning piece is 5-10 min/time (the sampling frequency is set according to actual requirements); when the acting force exceeds a preset threshold value of the telescopic assembly, the connecting rod of the telescopic assembly moves, the first sensing single piece arranged on the connecting rod is disconnected with the second sensing single piece arranged on the support, the receiving piece increases the sampling frequency of the displacement parameter of the positioning piece to 0.01-1 s/time, the sampling duration is 1-5s (preferably 3s), and the displacement data of the positioning piece received by the receiving piece is the vibration parameter of the object to be detected. The receiver adopts a Beidou high-precision GNSS receiver, and the model of the receiver is BD-DM-001.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A displacement and vibration monitoring device is characterized by comprising a sensing mechanism (1), a measuring mechanism (2) and a machine frame (3); the frame is arranged on the object to be detected; the measuring mechanism is arranged on the rack and used for monitoring the displacement parameter and the vibration parameter of the object to be measured; the sensing mechanism is arranged on the rack and used for triggering the measuring mechanism to improve the sampling frequency of displacement, the sensing mechanism comprises a telescopic component (1.1) and a sensing piece (1.2), the telescopic component is in contact with the measuring mechanism, the sensing piece is arranged on the telescopic component, and the telescopic component and the sensing piece on the telescopic component can move along with the action of an object to be measured; the measuring mechanism (2) comprises a positioning piece (2.1), a receiving piece, a rotating disc (2.2) and a power unit (2.3) arranged on the rack; the positioning piece is arranged on the turntable; the rotary table is connected with the power unit and can rotate; the receiving piece is used for receiving the position information of the positioning piece;
the coordinate of the positioning piece displacement data received by the receiving piece at a certain moment t is as follows: (x) a ，y a ) Due to the fact thatThe rotation of the turntable is a uniform rotation, so the antenna displacement (Δ x, Δ y) caused by the rotation of the turntable is calculated by the following formula:
Δx＝ρ·cosωt
Δy＝ρ·sinωt
the actual displacement value of the positioning element at a certain moment t, i.e. the vibration parameter (x) z ，y z ) Comprises the following steps:
x z ＝x a -ρ·cosωt
y z ＝y a -ρ·sinωt
in the formula:
the circle center of the rotary table is the origin of coordinates;
(x a ，y a ) Absolute coordinates of the displacement data of the positioning piece at a certain moment t;
(Δ x, Δ y) is the coordinate value of the positioner displacement data at a time t added by the rotation of the disk;
ρ is the distance from the positioning piece to the center of the circle of the turntable;
omega is the angular speed of the rotation of the turntable;
(x z ，y z ) The vibration parameters of the object to be measured, namely the real coordinates of the object to be measured in the vibration process; the positioning element is an antenna.
2. A displacement and vibration monitoring device according to claim 1, characterized in that the telescopic assembly (1.1) comprises a support (1.1.1), a connecting rod (1.1.2) and an elastic member (1.1.3); the support is arranged on the frame; the connecting rod is movably arranged on the support, and one end of the connecting rod is contacted with the measuring mechanism; the elastic piece is sleeved on the connecting rod, one end of the elastic piece is connected with the connecting rod, and the other end of the elastic piece is contacted with the support and/or the rack; the induction piece (1.2) comprises a first induction single piece (1.2.1) and a second induction single piece (1.2.2); the first induction single piece is arranged on the support; the second sensing single piece is arranged on the connecting rod and matched with the first sensing single piece to trigger the measuring mechanism to improve the sampling frequency of the displacement of the object to be measured.
3. The displacement and vibration monitoring device according to claim 2, wherein the sensing mechanism (1) further comprises a weight (1.3) and a limit stop (1.4); the counterweight is arranged on the connecting rod; one end of the limiting part is arranged on the support, and the other end of the limiting part is connected with the connecting rod and can limit the connecting rod.
4. The displacement and vibration monitoring device of claim 1, wherein the turntable is provided with at least one set of limiting grooves; the spacing of carousel can be realized with the contact of flexible subassembly to the spacing groove.
5. The displacement and vibration monitoring device according to claim 1, characterized in that the power unit (2.3) comprises a power member (2.3.1), a gear set (2.3.2) and an escapement mechanism (2.3.3); the power part is arranged on the rack; the gear set is respectively connected with the power part and the turntable and is used for transmitting power; the escapement mechanism is matched with the gear set and used for controlling the rotating speed of the gear set.
6. The displacement and vibration monitoring device according to claim 5, wherein the power unit further comprises a clutch (2.3.4); the clutch is respectively connected with the gear set and the power part and used for controlling the power output of the power part.
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Denomination of invention: A displacement and vibration monitoring device Effective date of registration: 20230613 Granted publication date: 20220726 Pledgee: Agricultural Bank of China Limited Changsha Wangcheng District sub branch Pledgor: Hunan Lianzhi Technology Co.,Ltd. Registration number: Y2023980043732 |