CN115201335A - Tunnel lining detects uses excitation device with self-powered function - Google Patents
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Abstract
The invention provides an excitation device with self-powered function for tunnel lining detection, which comprises: the shock excitation device comprises a shock excitation device shell, a self-generating module, a Bluetooth device, an electric energy conversion storage module, an impact head, a trigger device and a controller, wherein the Bluetooth device, the electric energy conversion storage module, the controller, the self-generating module and the trigger device are arranged inside the shock excitation device shell, the impact head is fixedly arranged at the top of the shock excitation shell, the self-generating module is connected with the electric energy conversion storage module, the electric energy conversion storage module is connected with the Bluetooth device, the trigger device and the controller, the trigger device is electrically connected with the controller, and the controller is in communication connection with a detection host through the Bluetooth device. The excitation device with the self-power supply function for tunnel lining detection, provided by the invention, can realize the self-power generation function, can supply power for the internal module, and can be used for a long time.
Description
Technical Field
The invention relates to the technical field of tunnel detection, in particular to an excitation device with a self-powered function for tunnel lining detection.
Background
As a common road connection form with strong bias selectivity, a tunnel is widely used as a road communication method in infrastructure construction projects such as railways. Along with the large-scale construction of high-speed railways in China in recent years, china has become the country which reserves most high-speed railway tunnels in the world and is also the country with the most diversified tunnel structure forms. At present, the total length of the Sichuan-Tibet railway which is built in China reaches more than 1700 kilometers, bridges and tunnels account for 80 percent of the total length, 6 tunnels with the length of more than 30 kilometers are planned and built according to incomplete statistics, and the longest tunnel reaches 42.5 kilometers.
The tunnel construction quality detection and monitoring are particularly important in the railway completion acceptance and railway operation stages. The existing method for detecting the surface defects of the tunnel lining is a geological radar method matched with a tapping method, namely, the tunnel lining detection is regulated to use the geological radar method matched with the tapping method in the acceptance standard of railway tunnel engineering construction quality (TB 10417-2018) implemented in 2019, 2, 1 and 2 months.
The tapping method (shock elastic wave method) has become the mainstream detecting instrument for tunnel lining due to its wide application and continuous improvement of testing precision. With the progress of science and technology, the detecting instrument is gradually wireless, namely the knocking device is wirelessly connected with the detecting host.
However, when the overlong tunnel is detected, especially when the detection is performed on the tibetan line, a large number of detection distribution points can lead to heavy detection tasks, the electric quantity of the Bluetooth module can be exhausted due to long-time use of the knocking device, and due to the limitation of the actual environmental conditions of the overlong tunnel, the energy charging of the vibration excitation device can be more complicated, so that the detection tasks are inconvenient. Therefore, it is necessary to design an excitation device for tunnel lining detection having a self-powered function.
Disclosure of Invention
The invention aims to provide an excitation device with a self-power supply function for tunnel lining detection, which can realize a self-power generation function, can supply power for an internal module and can be used for a long time.
In order to achieve the purpose, the invention provides the following scheme:
an excitation device with self-powered function for tunnel lining detection comprises: the shock excitation device comprises a shock excitation device shell, a self-generating module, a Bluetooth device, an electric energy conversion storage module, an impact head, a trigger device and a controller, wherein a power supply control cavity, a self-generating cavity and a trigger cavity are sequentially arranged in the shock excitation device shell from bottom to top, the impact head is fixedly arranged at the top of the shock excitation shell, the Bluetooth device, the electric energy conversion storage module and the controller are arranged in the power supply control cavity, the self-generating module is arranged in the power supply control cavity, the trigger device is arranged in the trigger cavity, the self-generating module is connected with the electric energy conversion storage module, the electric energy conversion storage module is connected with the Bluetooth device, the trigger device and the controller and used for supplying power, the trigger device is electrically connected with the controller, and the controller is in communication connection with a detection host through the Bluetooth device;
the utility model discloses a cutting coil, including magnet piece, insulating casing and coil, from the fixed setting in inside in electricity generation chamber insulating casing, insulating casing's outside is around establishing the coil, the coil is connected electric energy conversion storage module for conversion and storage electric energy, insulating casing's inside is provided with the smooth pipeline in the magnetic path, the inside setting of smooth pipeline in the magnetic path the magnet piece, the magnet piece is used for doing the cutting coil motion along smooth pipeline in the magnetic path under the effect of external force.
Optionally, a threaded rod is fixedly arranged at the top of the shell of the excitation device, a thread groove is formed in the bottom of the impact head corresponding to the threaded rod, the threaded rod is in threaded connection with the thread groove, and the impact head is fixedly arranged at the top of the shell of the excitation device.
Optionally, the magnet block is a ferromagnetic magnet block.
Optionally, the excitation device shell and the insulating shell are regular hexagonal prism-shaped shells.
Optionally, the electric energy conversion and storage module includes an electric energy conversion and storage circuit and a storage battery, the coil and the controller are connected to the electric energy conversion and storage circuit, and the electric energy conversion circuit is connected to the storage battery and is used for charging the storage battery.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the excitation device with the self-powered function for tunnel lining detection is provided with the self-powered module and the electric energy conversion storage module, can convert mechanical energy into electric energy when the excitation device is pushed by manpower to move up and down during excitation detection, stores the electric energy through the electric energy conversion storage module, supplies power for a Bluetooth device, a trigger device and a controller, and solves the problem that the excitation device cannot be used for a long time, wherein a magnet block moves up and down in an insulating shell under the action of manpower to cut a coil wound outside the insulating shell to generate electric energy, and the magnet block is a strong magnetic block and can generate power better; in addition, the top of the shell of the vibration excitation device is connected with the impact head through the threaded rod, so that the impact head can be conveniently replaced after being damaged, and the vibration excitation device is convenient to use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an excitation device for tunnel lining detection with a self-powered function according to an embodiment of the present invention;
FIG. 2 is an enlarged sectional view A;
FIG. 3 is an enlarged view of section B;
FIG. 4 is a schematic view of the motion process;
FIG. 5 is a graph of acceleration versus time waveforms;
FIG. 6 is a schematic Cartesian coordinate system;
FIG. 7 is a circuit diagram of a coil energy harvesting module;
FIG. 8 is a circuit diagram of a voltage conversion module;
fig. 9 is a circuit diagram of a bluetooth transmission module.
Reference numerals are as follows: 1. an excitation device housing; 2. a coil; 3. a coil joint; 4. an electric energy conversion and storage module; 5. a Bluetooth device; 6. an insulating housing; 7. a trigger device; 8. a trigger chamber; 9. an impact head; 10. an inner slideway of the magnetic block; 11. a magnet block; 12. a threaded rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide an excitation device with a self-power supply function for tunnel lining detection, which can realize a self-power generation function, can supply power for an internal module and can be used for a long time.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3, an excitation device for tunnel lining detection having a self-power supply function according to an embodiment of the present invention includes: the device comprises an excitation device shell 1, a self-generating module, a Bluetooth device 5, an electric energy conversion storage module 4, an impact head 9, a trigger device 7 and a controller, wherein a power supply control cavity, a self-generating cavity and a trigger cavity 8 are sequentially arranged in the excitation device shell 1 from bottom to top, the impact head 9 is fixedly arranged at the top of the excitation shell 1, the Bluetooth device 5, the electric energy conversion storage module 4 and the controller are arranged in the power supply control cavity, the self-generating module is arranged in the power supply control cavity, the trigger device 7 is arranged in the trigger cavity, the self-generating module is connected with the electric energy conversion storage module 4, the electric energy conversion storage module 4 is connected with the Bluetooth device 5, the trigger device 7 and the controller for supplying power, the trigger device 7 is electrically connected with the controller, and the controller is in communication connection with a detection host through the Bluetooth device 5;
the triggering device 7 and the impact head 9 are all realized by adopting the conventional technical means of the excitation device in the prior art.
As shown in fig. 2, from the electricity generation module including magnet piece 11, insulating casing 6 and coil 2, from the fixed setting in inside in electricity generation chamber insulating casing 6, insulating casing 6's outside is around establishing coil 2, coil 2 is connected electric energy conversion storage module 4 for conversion and storage electric energy, insulating casing 6's inside is provided with the interior smooth pipeline of magnetic path 10, the inside setting of smooth pipeline 10 in the magnetic path magnet piece 11, magnet piece 11 is used for doing the cutting coil motion along the interior smooth pipeline of magnetic path 10 under the effect of external force.
As shown in fig. 3, a threaded rod 12 is fixedly provided on the top of the excitation device housing 1, a threaded groove is provided on the bottom of the impact head 9 corresponding to the threaded rod 12, the threaded rod 12 is in threaded connection with the threaded groove, and the impact head 9 is fixedly provided on the top of the excitation device housing 1.
The magnet block 11 is a ferromagnetic magnet block.
The shell 1 of the excitation device and the insulating shell 6 are regular hexagonal prism-shaped shells.
The electric energy conversion and storage module 4 comprises an electric energy conversion and storage circuit and a storage battery, the coil 2 is connected with the electric energy conversion and storage circuit through the coil connector 3, the controller is connected with the electric energy conversion and storage circuit, and the electric energy conversion circuit is connected with the storage battery and used for charging the storage battery.
One embodiment of the invention is:
when the device is used for vibration excitation detection, a human power is adopted to push the vibration excitation device to upwards excite a detection object such as a tunnel, wherein the vibration excitation process comprises 4 motion processes of upward motion, contact of the device and the detected object, stop of the device and return of the device, as shown in fig. 4, wherein due to inertia, the magnet block only cuts a coil to move when the vibration excitation device stops, and therefore the motion process of the magnet block is considered to be decomposed into two processes: (1) when the exciting device stops, the magnet block has inertia velocity V 0 Moving upwards until contacting the top of the pipeline sliding in the magnetic block; (2) the magnetic block falls back to the bottom of the sliding pipeline in the magnetic block after colliding with the top.
According to the initial inertial velocity V of the magnet block 0 Since the velocity is the same as the velocity immediately after the excitation device comes into contact with the excited object and is an instantaneous velocity, the velocity is obtained by integrating:
during the excitation process, the acceleration-time curve at the moment when the excitation device contacts with the excited object can be captured by the acceleration sensor in the trigger device to form a waveform curve chart, as shown in fig. 5, and the instantaneous speed V can be obtained according to the curve integral 0 Therefore, the initial energy of the magnetic block is as follows:
according to the law of conservation of energy, the electric energy generated by the magnetic block cutting coil is as follows:
in the formula, V t The final speed of the magnetic block sliding to the top due to inertia is shown, M is the mass of the magnetic block, h is the sliding height of the magnetic block, K is an electric energy conversion coefficient, and the calculation formula is as follows:
solving the initial mechanical energy of the magnetic block:
the technical indexes of an acceleration sensor of the trigger device are as follows, wherein the relation between the acceleration and the measured voltage is as follows:
wherein a is acceleration in m/s 2 S is the sensitivity of the acceleration sensor and the unit is 0.3pc/m/S 2 ，
For the magnification factor, 0.05 times is taken, and V is the measurement voltage and is in units of V.
The maximum measurement voltage is taken empirically as 1V, and the maximum acceleration can be found from fig. 5 as:
a max ≈66.67×10 3 m/s 2 (5)
establishing a Cartesian coordinate system according to the curve, with a start point t 0 As an origin, time as an abscissa, acceleration as an ordinate, and a coordinate system as shown in fig. 6 are established, and a parabolic equation can be obtained by obtaining two-point coordinates and vertex coordinates of the X-axis, which can be known from the above-mentioned waveform diagram, so that the parabolic equation is obtained as follows:
y＝-0.1275x 2 +0.2025x (6)
converted into an equation of acceleration versus time of
a＝-0.1275t 2 +0.2025t (7)
Wherein the abscissa unit of the equation is ms, and the ordinate unit is m/ms 2 ；
Since the waveform is an acceleration change diagram from the start of contact to the stop of the excitation device, it is considered that when the time reaches t 1 Time (as can be seen from FIG. 5, t) 1 =1.5813ms ≈ 1.6 ms), the magnet block starts to cut the coil movement upward, i.e., t 1 The moment is the moment of electric energy conversion, and the speed of the slide block is V at the moment 0 V can be obtained from the formulas (1) and (7) 0 The initial speed of the magnet block is obtained as follows:
V 0 ＝67.38m/s (8)
similarly, according to the process of obtaining the initial speed of the magnetic block, the speed V of the magnetic block moving to the top end of the slide way can be obtained t The value is:
V t ＝63.89m/s (9)
the inductive electric energy obtained by the energy conversion mechanism must be converted and stored, and the pulsating, alternating and weak inductive voltage is converted into continuous and stable direct current to be output. Therefore, the generated electric energy needs to be rectified, boosted and stored, and an energy storage circuit is designed according to the requirement, wherein the whole energy storage circuit is divided into a coil energy collection module, a voltage conversion module and a Bluetooth sending module.
Wherein, as shown in fig. 7, the coil energy harvesting module: the induced electromotive force generated by the exciting coil is stored by a super capacitor (farad capacitor), and when the electric field energy is stored to a certain degree, the super capacitor can be used as a power supply to provide energy for a post-stage circuit.
As shown in fig. 8, the voltage conversion module: unstable voltage provided by a power supply (a farad capacitor storing certain energy) is subjected to DC-DC voltage conversion, certain output voltage regulation (such as 3.3V and 5V) can be performed according to a feedback circuit, the output voltage is relatively stable, and energy can be provided for a load.
As shown in fig. 9, the bluetooth transmission module: namely a Bluetooth module (load), and transmits and receives data by linking and matching other functional modules.
From the above, it is necessary to confirm the electric energy conversion coefficient K, and confirm the total mechanical energy of the magnet block, and the mechanical energy can be calculated according to the formula (7), and the electric energy is recorded by a specific energy mobile phone device. The following table shows data obtained by multiple simulation tests (note: in the test, the mass of the sliding block is 0.05 kg);
table 1 simulation experiment data table
As can be seen from the above table, the lowest conversion coefficient is 40%;
the standard power consumption of the Bluetooth module of the excitation device is 0.4W, and the energy consumption in 1h is as follows:
W 2 ＝0.4×10 -3 kw·h＝1440j (10)
considering the conversion rate K of the electrical energy, the electrical energy is:
formula (12) is the electric energy that once motion produced, when doing tunnel lining etc. and detect, according to 1h detection task, on average 5s excitation once, can excite 720 times in 1h, then the total amount of generating electricity of module in 1h from electricity generation is:
because the loss of the circuit for storing the electric energy is about 20 percent, the requirement of using the Bluetooth module is met by W 1 ×80％＞W 2 The result of equation (12) is greater than the result of equation (10), i.e., the following equation should be satisfied:
W 1 ＝w×720×80％＞1440J (13)
namely:
and (3) bringing the formulas (9) and (10) into the formula (14), and calculating the relationship between the mass and the height of the magnet block according to the highest electric energy conversion efficiency K =40%, as shown in the formula (15):
the size length of the excitation device is 1.1m, the length of a sliding cavity of the magnetic block is considered to be 0.5m, the driven type (15) can know that m is more than 0.03kg, and the mass of the magnetic block is 0.05kg, so that the excitation device can be obtained and can meet the power supply requirement of a Bluetooth device.
The excitation device with the self-powered function for tunnel lining detection is provided with the self-powered module and the electric energy conversion storage module, can convert mechanical energy into electric energy when the excitation device is pushed by manpower to move up and down during excitation detection, stores the electric energy through the electric energy conversion storage module, supplies power for a Bluetooth device, a trigger device and a controller, and solves the problem that the excitation device cannot be used for a long time, wherein a magnet block moves up and down in an insulating shell under the action of manpower to cut a coil wound outside the insulating shell to generate electric energy, and the magnet block is a strong magnetic block, so that better power generation can be realized; in addition, the top of the shell of the vibration excitation device is connected with the impact head through the threaded rod and the threads, so that the impact head can be conveniently replaced after being damaged, and the vibration excitation device is convenient to use.
The principle and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. The utility model provides a tunnel lining detects uses excitation device with self-powered function which characterized in that includes: the device comprises a shell of the excitation device, a self-generating module, a Bluetooth device, an electric energy conversion storage module, an impact head, a trigger device and a controller, wherein a power supply control cavity, a self-generating cavity and a trigger cavity are sequentially arranged in the shell of the excitation device from bottom to top;
the utility model discloses a cutting coil, including magnet piece, insulating casing and coil, from the fixed setting in inside in electricity generation chamber insulating casing, insulating casing's outside is around establishing the coil, the coil is connected electric energy conversion storage module for conversion and storage electric energy, insulating casing's inside is provided with the smooth pipeline in the magnetic path, the inside setting of smooth pipeline in the magnetic path the magnet piece, the magnet piece is used for doing the cutting coil motion along smooth pipeline in the magnetic path under the effect of external force.
2. The excitation device with the self-powered function for the tunnel lining detection as claimed in claim 1, wherein a threaded rod is fixedly arranged at the top of the excitation device shell, a threaded groove is formed in the bottom of the impact head corresponding to the threaded rod, the threaded rod is in threaded connection with the threaded groove, and the impact head is fixedly arranged at the top of the excitation device shell.
3. The excitation device for tunnel lining detection with a self-powered function according to claim 1, wherein the magnet block is a ferromagnetic magnet block.
4. The excitation device with the self-powered function for detecting the tunnel lining as claimed in claim 1, wherein the excitation device shell and the insulating shell are both regular hexagonal prism-shaped shells.
5. The excitation device with self-powered function for tunnel lining detection as claimed in claim 1, wherein said electric energy conversion and storage module comprises an electric energy conversion and storage circuit and a storage battery, said coil and controller are connected with said electric energy conversion and storage circuit, and said electric energy conversion circuit is connected with said storage battery for charging said storage battery.
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| CN115201335B (en) | 2024-09-06 |
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