CN211628378U - Piezoelectric induction earthquake alarm - Google Patents
Piezoelectric induction earthquake alarm Download PDFInfo
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- CN211628378U CN211628378U CN202020423701.7U CN202020423701U CN211628378U CN 211628378 U CN211628378 U CN 211628378U CN 202020423701 U CN202020423701 U CN 202020423701U CN 211628378 U CN211628378 U CN 211628378U
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- cantilever beam
- voltmeter
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Abstract
The utility model belongs to earthquake alarm field to specifically disclose a piezoelectricity response earthquake alarm, it includes alarm system, earthquake detecting system and control system, wherein: the alarm system comprises a direct current power supply, an alarm bell, an alarm lamp and a switch, wherein the direct current power supply, the alarm bell and the switch are connected in series, and the alarm lamp and the alarm bell are connected in parallel; the earthquake detection system comprises a base, a cantilever beam, piezoelectric patches and a voltmeter, wherein the cantilever beam is fixed on the base, the piezoelectric patches are attached to the upper surface and the lower surface of the cantilever beam and are close to one side where the cantilever beam is contacted with the base, and the voltmeter is connected to the piezoelectric patches; and the control system is respectively connected with the switch and the voltmeter. The utility model discloses an earthquake alarm collects earthquake detection and alarm in an organic whole, can not only detect out the earthquake, can also in time early warning simultaneously, reminds people to withdraw rapidly danger area, increases the user and withdraws the time, avoids causing the casualties.
Description
Technical Field
The utility model belongs to the earthquake alarm field, more specifically relates to a piezoelectricity response earthquake alarm.
Background
The sudden earthquake brings great threat to the life safety of the masses. Seismic waves are classified into three types according to propagation modes: longitudinal waves, transverse waves, and surface waves. The longitudinal wave is a propulsion wave and has the fastest propagation speed in the crust of the earth, so that the longitudinal wave firstly reaches the ground, the ground vibrates up and down, and the destructiveness is weaker; the transverse wave is shear wave, the propagation speed in the earth crust is slower than that of the longitudinal wave, and then the transverse wave reaches the ground, so that the ground shakes forwards and backwards, leftwards and rightwards, and the destructiveness is strong; the surface wave is a mixed wave generated by excitation after the longitudinal wave and the transverse wave meet at the earth surface. Its wavelength is large, amplitude is strong, it can only be propagated along ground surface, so that it is the main factor for making building strongly damaged.
For the piezoelectric cantilever beam, the beam structure is excited by seismic waves to vibrate and deform, the deformation can be detected by the piezoelectric sheet and converted into an electric signal, and the information of the coming earthquake can be found by processing the electric signal. Because the earthquake is often hidden and suddenly occurs, a device integrating detection and alarm is needed to be designed to provide enough escape time for people.
SUMMERY OF THE UTILITY MODEL
To prior art's above defect or improvement demand, the utility model provides a piezoelectricity response earthquake alarm, its aim at, after detecting seismic signal through earthquake detecting system, transmit control system, control system opens alarm system and sends out the police dispatch newspaper, the utility model discloses can not only detect out the earthquake rapidly, can also in time early warning simultaneously, remind people to withdraw danger area rapidly, avoid causing the casualties.
In order to achieve the above object, the utility model provides a piezoelectric induction earthquake alarm, including alarm system, earthquake detecting system and control system, wherein:
the alarm system comprises a direct current power supply, an alarm bell, an alarm lamp and a switch, wherein the direct current power supply, the alarm bell and the switch are connected in series, and the alarm lamp and the alarm bell are connected in parallel;
the earthquake detection system comprises a base, a cantilever beam, piezoelectric patches and a voltmeter, wherein the cantilever beam is fixed on the base, the piezoelectric patches are attached to the upper surface and the lower surface of the cantilever beam and are close to one side where the cantilever beam is contacted with the base, and the voltmeter is connected to the piezoelectric patches;
the control system is respectively connected with the switch and the voltmeter.
As a further preferred, the alarm bell, alarm lamp are mounted on the ceiling; the earthquake detection system is arranged on the wall surface, and the cantilever beam and the ground are kept horizontal.
It is further preferred that the natural frequency of the cantilever is within the frequency range of the seismic longitudinal wave.
More preferably, the piezoelectric sheet has a size of 5cm × 5cm × 0.5 cm.
More preferably, the material of the cantilever beam is polytetrafluoroethylene, and the size of the cantilever beam is 30cm multiplied by 5cm multiplied by 1 cm.
As a further preference, the cantilever beam and the base are fixed by glue.
Generally, through the utility model above technical scheme who thinks compares with prior art, mainly possesses following technical advantage:
1. the utility model discloses an earthquake alarm collects earthquake detection and alarm in an organic whole, detects seismic signal through earthquake detecting system after, transmits control system, and control system opens alarm system and sends out the police dispatch newspaper, can not only detect out the earthquake, can also in time the early warning simultaneously, reminds people to withdraw danger area rapidly, increases the user and withdraws the time, avoids causing the casualties.
2. The utility model discloses an earthquake alarm components and parts are few, and are with low costs, easy popularization to the installation is simple, only needs to adorn alarm system on the ceiling, adorn earthquake detection system at the wall can.
3. The utility model discloses in the frequency range of the natural frequency design of cantilever beam for seismic wave longitudinal wave, the reason has two points: firstly, the longitudinal wave has the fastest propagation speed and reaches the ground firstly, and more escape time can be provided for a user by detecting the longitudinal wave; and secondly, the natural frequency of the cantilever beam is designed to be within the frequency range of the longitudinal wave, so that the resonance of the cantilever beam can be excited, the voltage change of the voltmeter is large, and the detection sensitivity and accuracy are improved.
Drawings
Fig. 1 is a schematic structural view of a piezoelectric sensing earthquake alarm according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-direct current power supply, 2-alarm bell, 3-alarm lamp, 4-switch, 5-cantilever beam, 6-piezoelectric sheet, 7-piezoelectric sheet, 8-voltmeter, 9-base and 10-seismic wave excitation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The embodiment of the utility model provides a pair of piezoelectric induction earthquake siren, as shown in fig. 1, including alarm system A, earthquake detecting system B and control system C, wherein:
the alarm system A comprises a direct current power supply 1, an alarm bell 2, an alarm lamp 3 and a switch 4, wherein the direct current power supply 1, the alarm bell 2 and the switch 4 are connected in series, the alarm lamp 3 is connected with the alarm bell 2 in parallel, system breakdown caused by faults of the alarm bell 2 or the alarm lamp 3 is avoided, reliability is improved, and a circuit main loop is controlled by the switch 4;
the earthquake detection system B comprises a base 9, a cantilever beam 5, a piezoelectric sheet 6, a piezoelectric sheet 7 and a voltmeter 8, wherein the cantilever beam 5 is fixed on the base 9 and is firmly adhered together through glue; the piezoelectric sheets 6 and 7 are respectively attached to the upper and lower surfaces of the root part of the cantilever 5, even if the piezoelectric sheets 6 and 7 are close to the contact side of the cantilever 5 and the base 9, the voltmeter 8 is connected to the piezoelectric sheets 6 and 7 and is used for measuring the voltage generated by the piezoelectric sheets 6 and 7;
the control system C is respectively connected with the switch 4 and the voltmeter 8, and particularly, when the voltage value of the voltmeter 8 in the earthquake detection system B is very low and is close to 0, the control system C controls the switch 4 in the alarm system A to be disconnected, and the alarm system does not work; when the voltage value detected by the voltmeter 8 in the earthquake detection system B exceeds a critical value (a value set according to the earthquake intensity sensed by the ground), the control system C controls the switch 4 in the alarm system a to be closed, and the alarm system works.
Specifically, the alarm bell 2 and the alarm lamp 3 are arranged on a striking place on a ceiling, so that the user can be more noticed when early warning is initiated; the earthquake detection system B is arranged on the wall surface, and the cantilever beam 5 in the earthquake detection system B is kept horizontal with the ground.
Furthermore, the natural frequency of the cantilever beam 5 is within the frequency range of the longitudinal wave of the seismic wave, and is generally lower than 20Hz, so that the arrangement is that on one hand, the longitudinal wave has the fastest propagation speed and reaches the ground firstly, and the detected longitudinal wave can provide more escape time for a user; on the other hand, the natural frequency of the cantilever beam 5 is designed to be within the frequency range of the longitudinal wave, the resonance of the cantilever beam can be excited, the voltage change of the voltmeter 8 is large, and the detection sensitivity and accuracy are improved. Specifically, the material of the cantilever beam 5 is polytetrafluoroethylene, and the density and Young modulus of the material are about 2200kg/m as can be seen from the data3And 61.4Mpa, which is dimensioned to be 30cm × 5cm × 1cm, the natural frequency of the cantilever 5 being calculated to be about 10hz, and the resonance being temporarily excited by the earthquake in the frequency range of the seismic waves.
Further, the piezoelectric sheets 6 and 7 have the same size, and are 5cm × 5cm × 0.5 cm.
When an earthquake occurs, the seismic wave excitation 10 is transmitted to the earthquake detection system B to cause the resonance of the cantilever beam 5, the cantilever beam 5 deforms, so that a voltage difference is generated between the piezoelectric sheet 6 and the piezoelectric sheet 7, the voltage is detected by the voltmeter 8, the voltage value on the voltmeter 8 exceeds a critical value, then the control system C controls the switch 4 in the alarm system A to be closed, current flows through the circuit, the alarm bell 2 in the alarm system A gives an alarm sound, meanwhile, the alarm lamp 3 shines light, and a user can escape from a dangerous area in time after receiving alarm information.
The utility model provides a piezoelectricity response earthquake alarm can not only detect out the earthquake, can also in time early warning simultaneously, reminds people to withdraw rapidly danger area, avoids causing casualties.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A piezoelectric induction seismic alarm comprising an alarm system, a seismic detection system and a control system, wherein:
the alarm system comprises a direct current power supply (1), an alarm bell (2), an alarm lamp (3) and a switch (4), wherein the direct current power supply (1), the alarm bell (2) and the switch (4) are connected in series, and the alarm lamp (3) and the alarm bell (2) are connected in parallel;
the earthquake detection system comprises a base (9), a cantilever beam (5), piezoelectric patches and a voltmeter (8), wherein the cantilever beam (5) is fixed on the base (9), the piezoelectric patches are attached to the upper surface and the lower surface of the cantilever beam (5) and are close to one side where the cantilever beam (5) is contacted with the base (9), and the voltmeter (8) is connected to the piezoelectric patches;
the control system is respectively connected with the switch (4) and the voltmeter (8).
2. Piezoelectric induction earthquake alarm according to claim 1, characterised in that said alarm bell (2), alarm lamp (3) are mounted on the ceiling; the earthquake detection system is arranged on the wall surface, and the cantilever beam (5) is kept horizontal with the ground.
3. Piezoelectric induction seismic alarm according to claim 1, characterised in that the natural frequency of the cantilever beam (5) is in the frequency range of the seismic wave longitudinal wave.
4. A piezo-electric induction seismic alarm according to claim 1 wherein said piezo-electric sheet has dimensions of 5cm x 0.5 cm.
5. Piezoelectric induction seismic alarm according to claim 1, characterised in that the material of the cantilever beam (5) is polytetrafluoroethylene with dimensions of 30cm x 5cm x 1 cm.
6. A piezo-electric induction seismic alarm according to any of claims 1-5, characterized in that the cantilever beam (5) and the base (9) are fixed by glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020423701.7U CN211628378U (en) | 2020-03-27 | 2020-03-27 | Piezoelectric induction earthquake alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020423701.7U CN211628378U (en) | 2020-03-27 | 2020-03-27 | Piezoelectric induction earthquake alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211628378U true CN211628378U (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020423701.7U Active CN211628378U (en) | 2020-03-27 | 2020-03-27 | Piezoelectric induction earthquake alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211628378U (en) |
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2020
- 2020-03-27 CN CN202020423701.7U patent/CN211628378U/en active Active
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