CN212871136U - Fastening state real-time sensing device of vertical transportation equipment structure connecting piece - Google Patents
Fastening state real-time sensing device of vertical transportation equipment structure connecting piece Download PDFInfo
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- CN212871136U CN212871136U CN202022183069.6U CN202022183069U CN212871136U CN 212871136 U CN212871136 U CN 212871136U CN 202022183069 U CN202022183069 U CN 202022183069U CN 212871136 U CN212871136 U CN 212871136U
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Abstract
The patent of the utility model discloses a real-time perception device of fastening state of perpendicular transportation equipment structure connecting piece. The vibration wire type sensor comprises a vibration wire type sensor and a structural connecting piece, and is characterized in that a supporting end of the vibration wire type sensor is fixed by a first support, a movable part of the vibration wire type sensor is connected with a connecting rod, the other end of the connecting rod is connected with a third support through a spring, and the first support and the third support are respectively fixed at two connecting ends of the structural connecting piece. The utility model discloses a have the wide advantage of measurement deformation range, can effectively monitor structure connecting piece fastening state, the prevention is because of the accident that the structure connection inefficacy caused.
Description
Technical Field
The utility model belongs to engineering detection area, concretely relates to real-time perception device of fastening state of perpendicular transportation equipment structure connecting piece.
Background
The vertical transportation equipment for building construction is high-risk equipment for safe production of building construction, accidents occur frequently, and the accident consequences are particularly serious. The reason is that the loosening or falling of the bolts and the pins of the connecting pieces of the heavy equipment structures is one of the direct reasons. Therefore, real-time sensing and monitoring of the fastening state of the structural connecting pieces of the vertical transportation equipment for building construction becomes necessary.
At present, a vibrating wire strain sensor is widely applied to strain measurement of structures, the sensitivity and the accuracy of the vibrating wire strain sensor are widely accepted, and the vibrating wire surface strain sensor is used for stress strain measurement of structures such as concrete and steel structures. The structure of the vibrating wire sensor is described in the principles and applications of the Xuruilan et al, as shown in FIG. 1, where a tensioned vibrating wire 200 is placed in a magnetic field, one end is connected to the support 100 and the other end is connected to the movable member 400, and the natural frequency f of the vibrating wire 200 is0Can be determined by the following formula:
l is the length of the vibrating wire, rho is the linear density of the vibrating wire, and the frequency f of the vibrating wire0The tension T determines that the exciting coil 500 is adopted to suck the iron wire 700 on the vibrating wire 200 in the prior art, so that the vibrating wire 200 starts to vibrate, the vibrating wire 200 cuts the magnetic induction wire, so that the induced potential is generated in the receiving coil 300, and the induced potential is amplified by the amplifier 600 and then the frequency of the potential is directly measured, so that the tensile stress borne by the vibrating wire 200 can be obtained. In addition, the deformation of the connecting piece of the vertical transportation equipment is generally large, and the construction environment of the vertical transportation equipment is complex. The existing vibrating wire surface strain sensor has small measuring range and mostly adopts wired data transmission, which is not convenient for the complex construction condition of the vertical transportation equipment and can not meet the requirements of the vertical transportation equipmentAnd in the measuring range, the data is transmitted to the background to delay, so that real-time early warning cannot be performed.
Disclosure of Invention
The characteristics to perpendicular transportation equipment and the defect of current device, the utility model provides a real-time perception device of fastening state of perpendicular transportation equipment structure connecting piece. A wide range of measurements of microstrain to small deformations in the millimeter range can be made on structural joints.
The technical scheme adopted for realizing the above purpose of the invention is as follows:
the utility model provides a real-time perception device of fastening state of perpendicular transportation equipment structure connecting piece, includes vibration wire formula sensor, structure connecting piece, the support end of vibration wire formula sensor is fixed by support one, the movable part of vibration wire formula sensor connects the connecting rod, and the other end and the support tee of this connecting rod cross the spring and link to each other, support one, support three are fixed respectively in two junction departments of structure connecting piece.
Preferably, the connecting rod is sleeved in the through hole of the second support, and the outer periphery of the connecting rod is in sliding connection with the inner periphery of the through hole through rolling steel balls.
Preferably, the signal output end of the vibrating wire sensor is in signal connection with a pulse current conversion module, and the pulse current conversion module converts the potential frequency output by the signal output end of the vibrating wire sensor into an analog signal, and converts the analog signal into a digital signal through an AD conversion module. According to the utility model discloses a pulse current conversion module can select for use the pulse signal in patent CN209497449U and current signal's converting circuit, through wave detection, isolation, conversion voltage signal with the pulse signal of electric potential frequency, and the secondary filter is converted voltage signal into the current signal that changes with voltage in direct proportion again; the WIN311 chip can also be selected to directly convert the potential frequency into a digital signal.
The utility model discloses a measurement principle does: the first support and the third support are located at the two connecting ends of the structural connecting piece, and when the structural connecting piece deforms, the first support and the third support synchronously displace. The tension state of the vibrating wire in the spring and the vibrating wire type sensor is changed. Because the vibrating wire passes through the movable part and the connecting rod series spring, the utility model isNovel holistic elastic coefficient of sensor diminishes, the utility model discloses a holistic extreme condition of sensor decides by the limit bearing capacity of vibrating wire, if the utility model discloses a sensor and traditional vibrating wire formula sensor are under the same limit atress condition, the utility model discloses a displacement that the sensor can be measured is great, consequently, the utility model discloses a sensor can realize measuring on a large scale from micro-strain to millimeter level micro deformation. The specific principle derivation process is as follows: with kkSpring rate is expressed as kεThe stiffness of the vibrating wire is expressed, the mark distance of the vibrating wire is expressed by l (usually 100mm), then the utility model discloses a relation equation of the total measurement deformation x of the sensor and the strain epsilon measured by the frequency of the vibrating wire is
Therefore, the frequency of the vibrating wire when being excited changes synchronously with the corresponding relation of the deformation of the sensor. The signal output end of the vibrating wire type sensor outputs the potential frequency of the excited vibrating wire in real time, the pulse current conversion module converts the potential frequency signal into a current signal, and the current signal is converted into a digital signal through the AD conversion module.
Compared with the prior art, the utility model discloses a beneficial effect and advantage lie in:
the vibrating wire sensor with the novel structure reduces the overall elastic coefficient of the sensor, effectively enlarges the measuring range of the sensor and can realize the measurement from micro strain to millimeter-level small deformation;
drawings
FIG. 1 is a schematic diagram of a conventional vibrating wire sensor;
FIG. 2 is a structural diagram of the sensing device of the present invention;
FIG. 3 is a second view of the support of the sensing device of the present invention;
the sensor comprises a support I, a support II, a connecting rod 4, a spring 5, a support III, a rolling steel ball 7 and a structural connecting piece 8, wherein the support I is 1, the vibration wire type sensor 2, the support II is 3, the connecting rod is 4, the rolling steel ball is 6, and the structural connecting piece is 8.
Detailed Description
The fastening state sensing device for the structural connection member will be described in detail with reference to the accompanying drawings.
The structure of the structure connecting piece fastening state sensing device is shown in fig. 2, the sensing device, the supporting end 100 of the vibrating wire sensor 2 is fixed by a first support 1, the movable part 400 of the vibrating wire sensor 2 is rigidly connected with a low-rigidity spring 5 through a connecting rod 4, the other end of the low-rigidity spring 5 is fixed by a third support 6, the first support 1 and the third support 6 are respectively fixed at two connecting ends of a structure connecting piece 8 during measurement, the first support 1 and the third support 6 can synchronously displace along with the deformation of the structure connecting piece 8 when the structure connecting piece 8 deforms, if the structure connecting piece 8 is horizontally arranged, the connecting rod 4 is further sleeved in a second support 3, the second support 3 is installed on the structure connecting piece 8, the inner periphery of the second support 3 is in sliding connection with the outer periphery of the connecting rod 4 through a rolling steel ball 7, and the sensor structure can be prevented from being. The rolling steel balls 7 on the inner wall of the through hole of the second support 3 enable the connecting rod 4 to freely translate left and right, and influence on the accuracy of the sensor is reduced. The second support 3 is constructed as shown in fig. 3.
The synchronous displacement of the first support 1 and the third support 6 along with the deformation of the structural connecting piece 8 can change the tensioning states of the vibrating wire 200 and the low-stiffness spring 5 in the vibrating wire type sensor 2. The vibrating wire type sensor 2 is connected with the low-stiffness spring 5 in series, so that the elastic coefficient of the whole sensor is reduced, the limit state of the sensor is determined by the limit bearing capacity of the vibrating wire 200 in the sensor, and if the sensor with the improved structure is under the same limit stress condition as the traditional sensor, the displacement which can be measured by the sensor with the improved structure is larger, and therefore the sensor with the improved structure can realize the measurement from micro strain to millimeter-scale micro deformation. With kkSpring rate is expressed as kεThe rigidity of the vibrating wire type sensor 2 is expressed, l represents the gauge length (usually 100mm) of the vibrating wire type sensor 2, and the relation equation of the total measured deformation x of the sensor with the improved structure and the strain epsilon measured by the vibrating wire frequency is as follows
Further, the frequency of the vibrating wire when excited is changed synchronously with the deformation of the structural connecting piece. Signal connection pulse current conversion of signal output end of vibrating wire sensorAnd the pulse current conversion module converts the potential frequency output by the signal output end of the vibrating wire sensor into an analog signal, and converts the analog signal into a digital signal through the AD conversion module. According to the utility model discloses a pulse current conversion module can select for use the pulse signal in patent CN209497449U and current signal's converting circuit, through wave detection, isolation, conversion voltage signal with the pulse signal of electric potential frequency, and the secondary filter is converted voltage signal into the current signal that changes with voltage in direct proportion again; the WIN311 chip can also be selected to directly convert the potential frequency into a digital signal.
Claims (3)
1. The utility model provides a real-time perception device of fastening state of perpendicular transportation equipment structure connecting piece, includes vibration wire formula sensor, structure connecting piece, its characterized in that, the support end of vibration wire formula sensor is fixed by support one, the movable part of vibration wire formula sensor connects the connecting rod, and the other end and the support tee of this connecting rod cross the spring and link to each other, two junction departments at the structure connecting piece are fixed respectively to support one, support three.
2. The device for sensing the fastening state of the structural connecting piece of the vertical transportation equipment as claimed in claim 1, wherein the connecting rod is sleeved in the through hole of the second support, and the outer periphery of the connecting rod is slidably connected with the inner periphery of the through hole through a rolling steel ball.
3. The device for sensing the fastening state of the structural connecting piece of the vertical transportation equipment according to any one of claims 1 to 2, wherein a signal output end of the vibrating wire sensor is in signal connection with a pulse current conversion module, and the pulse current conversion module converts potential frequency output by the signal output end of the vibrating wire sensor into an analog signal and converts the analog signal into a digital signal through an AD (analog-to-digital) conversion module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022183069.6U CN212871136U (en) | 2020-09-29 | 2020-09-29 | Fastening state real-time sensing device of vertical transportation equipment structure connecting piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022183069.6U CN212871136U (en) | 2020-09-29 | 2020-09-29 | Fastening state real-time sensing device of vertical transportation equipment structure connecting piece |
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| Publication Number | Publication Date |
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| CN212871136U true CN212871136U (en) | 2021-04-02 |
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| CN202022183069.6U Active CN212871136U (en) | 2020-09-29 | 2020-09-29 | Fastening state real-time sensing device of vertical transportation equipment structure connecting piece |
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- 2020-09-29 CN CN202022183069.6U patent/CN212871136U/en active Active
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