CN203941602U - A kind of high-sensitive multifunction earthquake alarming device - Google Patents
A kind of high-sensitive multifunction earthquake alarming device Download PDFInfo
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- CN203941602U CN203941602U CN201420255388.5U CN201420255388U CN203941602U CN 203941602 U CN203941602 U CN 203941602U CN 201420255388 U CN201420255388 U CN 201420255388U CN 203941602 U CN203941602 U CN 203941602U
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Abstract
The utility model discloses a kind of high-sensitive multifunction earthquake alarming device, comprise seismic signal sensor and warning circuit, described warning circuit comprises signal processing unit, amplifying unit, detection reset unit, self-locking holding unit, acoustic alarm unit, light alarm unit, timing unit and power supply unit; Described seismic signal sensor setting fixing base, arranges top electrode bearing and bottom electrode bearing on it, conduction device and shear wave sensing device are set between top electrode bearing and bottom electrode bearing.Experiment showed, and the utlity model has ripple compound sampling in length and breadth, sensitivity is higher, synchronously reflects the generation of earthquake, and the same alarm of acousto-optic, and warning is strong; The advantages such as antijamming capability misses by force, and report rate is low.And with low cost, resident's purchasing demand is strong.The utility model can have been accomplished the i.e. report in danger, and the whole people respond fast, contribute to protect people's life, property safety, and loss is reduced to bottom line, and its effective enforcement will be made positive contribution for preventing and reducing natural disasters of the mankind.
Description
Technical field
The utility model belongs to seismic signal checkout equipment technical field, be specifically related to a kind of simple in structure, the high-sensitive multifunction earthquake alarming device that cost of manufacture is cheap.
Background technology
The earth is one of the solar system nine major planets, the ellipse of revolution spheroid that shaped slightly is flat.The earth is made up of the earth's crust, earth mantle, the earth's core.The hierarchy of the earth is to divide by the velocity of propagation of seismic event (P and S) substantially.There is significant horizontal heterogeneity on earth upper strata: the thickness of continental crust and oceanic crust differs widely, and when earthquake, focus gives off two kinds of seismic events, compressional wave P and shear wave S.They respectively with different speed to all around propagating, arrive different place on ground through different time.
So-called " heaven easily, enters ground difficult ", the mankind so far cannot Accurate Prediction earthquake.May there is earthquake in detection, must must arrive and breed earthquake depth, arrive tens kilometers of even deeps of tens kilometers, and the degree of depth that at present world can reach also just more than 10 kilometers, dopes to entirely accurate great ruinous earthquake, does not still accomplish at present.China is positioned at the world's two violent earthquake bands, between circum-Pacific seismic zone and Eurasian seismic zone.According to statistics, since 20th century, there are nearly 800 times of more than 6 grades earthquake in middle Kuomintang-Communist, spreads all over province, Zi Ye district, municipality directly under the Central Government all except Guizhou, Zhejiang two provinces and farewell administrative area, Hong Kong.Earthquake is one of common disaster of China, is also the strongest destructive geologic hazard.Especially occur in " 5.12 " violent earthquake in 2008, the personnel and the property loss that cause are huge, attract people's attention and shock.
Although earthquake is not often to occur, loss people's lives and properties being caused when it inestimable temporarily.Just because of be not often to occur yet, so can not make immediately correct judgement once there are people, when particularly occur night, people often in one's sleep, have little time to react for the moment, incur loss through delay the quality time of escape, final often also much bigger than the injures and deaths of estimating.How as far as possible the generation of knowing earthquake of morning, reduces harm, especially hazard to person that earthquake causes the mankind, is that scientific worker expects the problem solving always.Also developed a lot of detection earthquakes and arrived, and sent chimes of doom, reminded people to do some preparations, won even the escape in several seconds or the time of escape from danger.But the warning device of prior art exists reaction to delay,, there is the more high drawback of rate of false alarm in poor anti jamming capability.For this reason, the inventor is through concentrating on studies, and intention exploitation one is quick on the draw, and the seismic signal that antijamming capability is strong detects and warning device, is the effective means addressing this problem.
Utility model content
It is a kind of simple in structure that the purpose of this utility model is to provide, and cost of manufacture is cheap, be quick on the draw, and the high-sensitive multifunction earthquake alarming device that antijamming capability is strong.
The purpose of this utility model is to realize like this, comprise seismic signal sensor and warning circuit, described warning circuit comprises signal processing unit, amplifying unit, detection reset unit, self-locking holding unit, acoustic alarm unit, light alarm unit, timing unit and power supply unit; It is characterized in that: described signal processing unit signalization access terminal, its lead-out terminal connects amplifying unit and self-locking holding unit, and described amplifying unit connects the loudspeaker Y of acoustic alarm unit; The controllable silicon T of described self-locking holding unit connects with the light emitting diode of light alarm unit, and in parallel with timing unit; Described seismic signal sensor setting fixing base, top electrode bearing and bottom electrode bearing are set on it, conduction device and shear wave sensing device are set between top electrode bearing and bottom electrode bearing, described conduction device comprises compressional wave conduction messenger wire, weight and compressional wave conduction bottom electrode, described compressional wave conduction messenger wire upper end connects conduction device, its lower end connects weight, weight bottom and the compressional wave conduction bottom electrode clearance fit being arranged on bottom electrode bearing; The socket of the shear wave conducting electrode of described shear wave sensing device and weight coordinates, and with the electric connection of bottom electrode bearing, on described sensor, electrode support and bottom electrode bearing are connected respectively the signal incoming end of warning circuit.
The utility model adopts in length and breadth ripple composite sensing device as seismic signal pick-up unit, and by the electric signal access music alarm circuit of its response, immediately sends alerting signal clearly, prompting people coming earthquake, fast-escape.Experiment showed, and the utlity model has ripple compound sampling in length and breadth, sensitivity is higher, synchronously reflects the generation of earthquake, and the same alarm of acousto-optic, and warning is strong; The advantages such as antijamming capability misses by force, and report rate is low.And with low cost, resident's purchasing demand is strong.Country is building a harmonious society; people-oriented; cherish life is basic demand; the utility model can have been accomplished the i.e. report in danger; the whole people respond fast; the life, the property safety that contribute to protect people, be reduced to bottom line loss, and its effective enforcement will be made positive contribution for preventing and reducing natural disasters of the mankind.
Brief description of the drawings
Fig. 1 is the utility model one-piece construction and electrical principle schematic;
Fig. 2 is the left view of Sensor section in Fig. 1;
Fig. 3 is the a-quadrant enlarged drawing of Fig. 1;
In figure: 1-fixing base, 2-top electrode bearing, 3-bottom electrode bearing, 4-conduction device, 5-compressional wave conduction messenger wire, 6-weight, 7-compressional wave conduction bottom electrode, 8-shear wave conducting electrode, 81-electrode suppor, 9-shear wave electrode support, 91-electrode support, 92-regulates swing handle, polar conductor under 10-, the upper polar conductor of 11-, 12-shield assembly, 13-set collar; AN1 is test button, and AN2 is reset button, and BG is amplifying triode, D is light emitting diode, and M is clock module and stepper motor, and T is controllable silicon, Y is loudspeaker, and C1 is anti-tampering electric capacity, and C2 is filtering capacitance of voltage regulation, C2 is anti-shake electric capacity, the current-limiting resistance that R1 is T, the current-limiting resistance that R2 is D, the current-limiting resistance that R3 is M, and IC is signal processing unit, Vdd is power supply input positive terminal, TG is signal terminal, and OUT is output terminal, and Vss is power supply input negative pole end.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but never in any form the utility model is limited, any change or the improvement done based on the utility model training centre, all belong to protection domain of the present utility model.
As shown in Figure 1, the utility model comprises seismic signal sensor and warning circuit, and described warning circuit comprises signal processing unit, amplifying unit, detection reset unit, self-locking holding unit, acoustic alarm unit, light alarm unit, timing unit and power supply unit; Described signal processing unit signalization access terminal, its lead-out terminal connects amplifying unit and self-locking holding unit, and described amplifying unit connects the loudspeaker Y of acoustic alarm unit; The controllable silicon T of described self-locking holding unit connects with the light emitting diode D of light alarm unit, and in parallel with timing unit; Described seismic signal sensor setting fixing base 1, top electrode bearing 2 and bottom electrode bearing 3 are set on it, conduction device and shear wave sensing device are set between top electrode bearing 2 and bottom electrode bearing 3, described conduction device comprises compressional wave conduction messenger wire 5, weight 6 and compressional wave conduction bottom electrode 7, described compressional wave conduction messenger wire 5 upper ends connect conduction device 4, its lower end connects weight 6, weight 6 bottoms and compressional wave conduction bottom electrode 7 clearance fit that are arranged on bottom electrode bearing 3; 6 sockets of the shear wave conducting electrode 8 of described shear wave sensing device and weight coordinate, and are electrically connected with bottom electrode bearing 3, and on described sensor, electrode support 2 and bottom electrode bearing 3 are connected respectively the signal incoming end of warning circuit.
The conduction device 4 of described conduction device is longitudinal extension electrically conductive elastic structure, its upper end and electrical affixed cooperation of top electrode bearing 2; Lower end is conducted messenger wire 5 by compressional wave and is coordinated with electric conductivity weight 6 is affixed, and weight 6 bottoms coordinate with compressional wave conduction bottom electrode 7 upper gap.
The conduction device 4 of described conduction device is annular extension spring structure, and its axial line and compressional wave conduct messenger wire 5 on same perpendicular line, and corresponding with compressional wave conduction bottom electrode 7.
Compressional wave conduction bottom electrode 7 and bottom electrode bearing 3 threaded engagement of described conduction device, the gap between compressional wave conduction bottom electrode 7 and weight 6 bottoms is adjustable, and its distance is 0.1 ~ 1.0cm; The elasticity coefficient of described conduction device 4 is 0.1 ~ 0.6, and the characteristic resonant frequency of described conduction device is 1 ~ 15Hz.
Distance between compressional wave conduction bottom electrode 7 and the weight 6 of described conduction device is 1 ~ 10mm, described weight 6 is highly 0.5～3cm, described compressional wave conduction messenger wire 5 length are 2～48cm, the regime of elastic deformation of described conduction device 4 is 1 ~ 10mm, distance between described top electrode bearing 2 and bottom electrode bearing 3 is the length sum that conduction device 4 and compressional wave conduct messenger wire 5, weight 6, compressional wave conduction bottom electrode 7, and its resonance frequency is 0.1Hz～10Hz.
In the form of a ring or bottomless funnel-form, it is by shear wave electrode suppor 81 and shear wave electrode support 9 threaded engagement for the shear wave conducting electrode 8 of described shear wave sensing device, the two ends of shear wave electrode support 9 be fixed on electrode support 91 on fixing base 1 and move and coordinate; Shear wave conducting electrode 8 coordinates with the coaxial socket of weight 6, and the gap of shear wave conducting electrode 8 inner edges and weight 6 outer rims is 2 ~ 10mm, and shear wave conducting electrode 8 connects bottom electrode bearing 3 by shear wave electrode support 9.By regulating shear wave electrode column 9, can make weight 6 move up and down in shear wave conducting electrode 8.
Described conduction device arranges shield assembly 12 outward, outer rim and fixing base 1 Joint, and at least the compressional wave of conduction device conduction messenger wire 5 and weight 6 are arranged in shield assembly 12, and coordinate with its inwall noncontact; Described shield assembly 12 is hood configuration, coordinates with fixing base 1 is affixed by set collar 13.
The signal processing unit IC of described warning circuit is 12 sections of music modules, the anti-tampering capacitor C 1 of cross-over connection between its power supply input positive terminal Vdd and signal terminal TG; The output terminal OUT of described signal processing unit IC connects the adjustable side of controllable silicon T by current-limiting resistance R1; The positive pole of described controllable silicon T is connected in series light emitting diode D by current-limiting resistance R2, and connects power supply unit.
Clock module and the stepper motor M of the controllable silicon T circuit timing unit in parallel of described warning circuit, and be arranged in parallel anti-shake capacitor C 2, described clock module is connected power supply unit with stepper motor M by current-limiting resistance R3.
Described signal processing unit IC connects detection reset unit, and between signal processing unit IC and power supply input negative pole end Vss and signal terminal TG, cross-over connection arranges test button AN1; Positive pole one side of power supply unit arranges reset button AN2.
the utility model principle of work and the course of work:
The utility model adopts in length and breadth ripple compound sensor as seismic signal pick-up unit, and by the electric signal access music alarm circuit of its response, immediately sends alerting signal clearly, prompting people coming earthquake, fast-escape.Seismic event sensor is exclusive for earthquake long wave, detection, the collection of the vibration signal of ultralow frequency ripple design, only comparatively responsive to seismic event, high frequency waves to mankind's activity are insensitive, thereby can effectively avoid the interference of mankind's activity, such as impacting, beat etc., in high sensitivity situation, significantly reduce rate of false alarm.In the time that seismic event arrives, lateral wave will cause tup to swing all around to encounter shear wave sensing set collar, and send seismic signal.And longitudinal wave will cause tup bob to encounter compressional wave sensing fixed pivot, and send seismic signal.Be that seismic event sensor is equivalent to a contact-making switch, its not power consumption at ordinary times, be output as 12 sections of music IC modules of switching signal trigger alarm unit, in the time receiving trigger pip, its output terminal output (high level) music signal, be used for starting self-locking holding circuit T, can carry out the warning output of 12 different music, its power consumption lower (when standby 1 microampere of left and right).In noisy environment, sometimes may can't hear music sound, the high brightness LED D of light alarm unit sends light warning signal, and in dark surrounds, this light also can be used as emergency light for finding electric torch or escape illumination at auxiliary night etc.
Self-locking holding circuit adopts micro-electric current controllable silicon T as detecting starting element, and it is subject to high level pulse effect for the first time, and realizes self-sustaining, resets and removes until artificial.
The R3 of timing unit provides the reliability service electric current of pointer clock M and the minimum maintenance electric current of T, and C2 works to stablize M operating voltage.When normal work, C2 both end voltage equals supply voltage substantially, when clock is normally walked.Have seismic signal when input, the T C2 both end voltage that is triggered to reduce to the forward voltage (being less than 0.7V) of T, clock stops and keeping.Seismic signal is below to T generation effect, but on not impact of music output, reports to the police therefore can realize repeatedly.
Shear wave conducting electrode 8 adopts the good copper material of electric conductivity to make conventionally, and the outer intermarginal distance of electrode retaining collar and weight is adjusted in adjustment ring footpath, can change the sensitivity of shear wave conduction.Or by the adjusting swing handle 92 on shear wave electrode support 9, drive shear wave electrode support 9 to rotate between electrode support 91, drive electrode suppor 81 to move up and down along drive electrode pillar 91, thereby adjust relative position or air line distance between shear wave conducting electrode 8 and weight 6 root edges, reach the object of adjusting shear wave conducted susceptibility.
Adopt infundibulate shear wave conducting electrode 8 to contribute to adjust, the sensitivity of shear wave conduction, electrode is in upper position, in the minimum aperture of weight in funnel time, the sensitivity of shear wave conduction is the highest, otherwise the air line distance of weight root edge and infundibulate electrode is far away, and sensitivity is lower.Therefore,, when practical installation and trial, can adjust flexibly according to earthquake-resistant building grade or according to the actual requirements sensitivity.
The utility model is compared with other products, the key that realizes high sensitivity and low rate of false alarm is that top electrode bearing 2 is to the distance of weight center of gravity and the resonance length of seismic event, the resonance frequency of device is controlled to the lower frequency limit of the interfering frequency of 2Hz(mankind's activity) below, to avoid the interference of mankind's activity.According to the related science data of actual vibration frequency, except the frequency of massif directional blasting (explosion of atomic bomb etc.) is lower, other behavior frequency is higher (vibroll (higher than 5Hz) all, beaing etc. (higher than 20Hz of house decoration, people's ear can be heard), this inductor is not affected substantially).Due to low work ratio and the high reliability request of this device, comprise that sensor, switch etc. have contact element all to require to carry out anti-oxidant treatment.
As embodiment of the utility model, its top electrode bearing 2 is 24.8cm with bottom electrode bearing 3, and its resonance frequency is 1Hz.If the resonance frequency of system is determined, zoom in or out by the multiple of the fundamental distance between upper/lower electrode bearing, get final product maximization or the miniaturization of implement device.
When work, when after the access of 3V battery, 12 sections of music IC enter holding state, and OUT holds no-output, BG, all not conductings of T.C2 charges by D, R2 and R3, and in the time that voltage reaches 1.4V, electronic quartz clock M starts working (now must aim at Beijing time), enters normal condition.
In the time that seismic event sensor has signal input, over the ground, OUT holds output alarm music to IC music block TG terminal voltage, triode BG work, and loudspeaker Y is sent alarm sound.Micro-electric current controllable silicon T triggers and conducting through R1, and C2 both end voltage is by short circuit, electronic quartz clock M dead electricity and stopping, and light emitting diode D forms path through R2, T and luminous.Because of the characteristic of controllable silicon T, this state keeps for a long time.Until artificially reset.Because of the charge-discharge characteristic of capacitor C 3, will not respond the follow-up ripple of vibrations each time, and only aftershock afterwards be had to response, and send repeatedly alarm sound through loudspeaker Y simultaneously.In the time of Pen-down detection button AN1, its effect is identical with the situation of receiving one earthquake ripple.And in the time finding that light has lighted, first write down current time (time of earthquake for the first time), and then Pen-down detection button AN1, listens to music stroke below carefully, and it will have vibration (stroke subtracts 1 time) several times before prompting.In the time pressing reset button AN2, its effect is identical with the situation that reloads battery, can carry out general reset to stroke number of times and light warning.After reset, should again aim at Beijing time.
The utlity model has following advantage:
1, the same alarm of acousto-optic, so that different crowd responds fast;
2, stable body of wall is basic as installing, and sensor sealing installation, has reduced artificial or noise jamming, reduces rate of false alarm.
3, ripple compound sampling in length and breadth, sensitivity is higher, May in 2014 7 Chuxiong Prefecture Yuanmou County Yang Jie townshiies of Wan Yunnan Province earthquake, the 1st time was sent alerting signal, fitted like a glove with the time of official report.
4, alarm logging hold mode for the first time, contributes to ex-post analysis and alarm self assessment to have larger help.Warning lamp keeps Chang Liang simultaneously, auxiliary escape illumination at night.
5, adopt and repeat music logging modles 12 times, can to the aftershock after first record and repeatedly music alarm point out.
6, test button is set, can checks that whether battery electric quantity and music be normal.
7, reset button is set, can carries out general reset to warning light and recorded information.
8, power pole is low, and No. 5 batteries of two joints can be worked more than half a year, are a kind of earthquake instant alarming devices of easy and extensive practicality.
Inventor understands the earthquake Alarm of selling on market, few, and multi-functional do not have especially, general is easily subject to wind, the external interference such as close the door.Price 100-800 yuan is not etc., is not difficult to find out, Multifunctional earthquake warning device has an enormous advantage at tool aspect production cost, serviceable life, product structure.Cost of manufacture estimation of the present utility model, if this product drops into batch production, every cover cost can be controlled in 80 yuan of left and right, estimates that price can be controlled in 180 yuan of left and right, waits market to open, and when turnout is large, estimates that price can be controlled in 140 left and right.With regard to producer, cost is low, and income is good.About 10 years serviceable life, the cost of sharing each year is only a few unit ~ tens yuan, concerning masses, can bear completely.
Claims (10)
1. a high-sensitive multifunction earthquake alarming device, comprise seismic signal sensor and warning circuit, described warning circuit comprises signal processing unit, amplifying unit, detection reset unit, self-locking holding unit, acoustic alarm unit, light alarm unit, timing unit and power supply unit, it is characterized in that: described signal processing unit signalization access terminal, its lead-out terminal connects amplifying unit and self-locking holding unit, and described amplifying unit connects the loudspeaker (Y) of acoustic alarm unit, the controllable silicon (T) of described self-locking holding unit is connected with the light emitting diode (D) of light alarm unit, and in parallel with timing unit, described seismic signal sensor setting fixing base (1), top electrode bearing (2) and bottom electrode bearing (3) are set on it, between top electrode bearing (2) and bottom electrode bearing (3), conduction device and shear wave sensing device are set, described conduction device comprises compressional wave conduction messenger wire (5), weight (6) and compressional wave conduction bottom electrode (7), described compressional wave conduction messenger wire (5) upper end connects conduction device (4), its lower end connects weight (6), weight (6) bottom and compressional wave conduction bottom electrode (7) clearance fit being arranged on bottom electrode bearing (3), the shear wave conducting electrode (8) of described shear wave sensing device coordinates with weight (6) socket, and be electrically connected with bottom electrode bearing (3), electrode support on described sensor (2) and bottom electrode bearing (3) are connected respectively the signal incoming end of warning circuit.
2. high-sensitive multifunction earthquake alarming device according to claim 1, is characterized in that: the conduction device (4) of described conduction device is longitudinal extension electrically conductive elastic structure, its upper end and electrical affixed cooperation of top electrode bearing (2); Messenger wire (5) and affixed cooperation of electric conductivity weight (6) are conducted by compressional wave in lower end, and weight (6) bottom coordinates with compressional wave conduction bottom electrode (7) upper gap.
3. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: the conduction device (4) of described conduction device is annular extension spring structure, its axial line and compressional wave conduct messenger wire (5) on same perpendicular line, and corresponding with compressional wave conduction bottom electrode (7).
4. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: compressional wave conduction bottom electrode (7) and bottom electrode bearing (3) threaded engagement of described conduction device, gap between compressional wave conduction bottom electrode (7) and weight (6) bottom is adjustable, and its distance is 1 ~ 10mm; The elasticity coefficient of described conduction device (4) is 0.1 ~ 0.6, and the characteristic resonant frequency of described conduction device is 1 ~ 15Hz.
5. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: the distance between compressional wave conduction bottom electrode (7) and the weight (6) of described conduction device is 1 ~ 10mm, described weight (6) is highly 0.5～3cm, described compressional wave conduction messenger wire (5) length is 2～48cm, the regime of elastic deformation of described conduction device (4) is 1 ~ 10mm, distance between described top electrode bearing (2) and bottom electrode bearing (3) is conduction device (4) and compressional wave conduction messenger wire (5), weight (6), the length sum of compressional wave conduction bottom electrode (7), its resonance frequency is 0.1Hz～10Hz.
6. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: the shear wave conducting electrode (8) of described shear wave sensing device in the form of a ring or bottomless funnel-form, it is by electrode suppor (81) and shear wave electrode support (9) threaded engagement, the two ends of shear wave electrode support (9) be fixed on electrode support (91) on fixing base (1) and move and coordinate; Shear wave conducting electrode (8) coordinates with the coaxial socket of weight (6), and the gap of shear wave conducting electrode (8) inner edge and weight (6) outer rim is 2 ~ 10mm, and shear wave conducting electrode 8 connects bottom electrode bearing (3) by shear wave electrode support (9).
7. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: described conduction device arranges shield assembly (12) outward, outer rim and fixing base (1) Joint, at least the compressional wave of conduction device conduction messenger wire (5) and weight (6) are arranged in shield assembly (12), and coordinate with its inwall noncontact; Described shield assembly (12) is hood configuration, by set collar (13) and affixed cooperation of fixing base (1).
8. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: the signal processing unit (IC) of described warning circuit is 12 sections of music modules the anti-tampering electric capacity of cross-over connection (C1) between its power supply input positive terminal (Vdd) and signal terminal (TG); The output terminal (OUT) of described signal processing unit (IC) connects the adjustable side of controllable silicon (T) by current-limiting resistance (R1); The positive pole of described controllable silicon (T) is connected in series light emitting diode (D) by current-limiting resistance (R2), and connects power supply unit.
9. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: clock module and the stepper motor (M) of controllable silicon (T) the circuit timing unit in parallel of described warning circuit, and be arranged in parallel anti-shake electric capacity (C2), described clock module is connected power supply unit with stepper motor (M) by current-limiting resistance (R3).
10. high-sensitive multifunction earthquake alarming device according to claim 1, it is characterized in that: described signal processing unit (IC) connects detection reset unit, between signal processing unit (IC) and power supply input negative pole end (Vss) and signal terminal (TG), cross-over connection arranges test button (AN1); Positive pole one side of power supply unit arranges reset button (AN2).
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| CN201420255388.5U CN203941602U (en) | 2014-05-19 | 2014-05-19 | A kind of high-sensitive multifunction earthquake alarming device |
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| CN201420255388.5U CN203941602U (en) | 2014-05-19 | 2014-05-19 | A kind of high-sensitive multifunction earthquake alarming device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956029A (en) * | 2014-05-19 | 2014-07-30 | 车小月 | Multifunctional high-sensitivity earthquake warning device |
| CN105548609A (en) * | 2016-02-15 | 2016-05-04 | 魏平源 | One-way swing sensor |
-
2014
- 2014-05-19 CN CN201420255388.5U patent/CN203941602U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956029A (en) * | 2014-05-19 | 2014-07-30 | 车小月 | Multifunctional high-sensitivity earthquake warning device |
| CN103956029B (en) * | 2014-05-19 | 2016-09-21 | 车小月 | A kind of high-sensitive multifunction earthquake alarming device |
| CN105548609A (en) * | 2016-02-15 | 2016-05-04 | 魏平源 | One-way swing sensor |
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