CN2274779Y

CN2274779Y - Miniature earthquake alarm

Info

Publication number: CN2274779Y
Application number: CN 96249156
Authority: CN
Inventors: 段江洪
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-17
Filing date: 1996-12-17
Publication date: 1998-02-18
Anticipated expiration: 2006-12-17

Abstract

The utility model provides a miniature earthquake alarm, which is composed of a sensing head, a control circuit and a casing, wherein, one end of the sensing head is connected with a power supply and the emitting electrode of a triode V < 1 >; the other end is connected with the collecting electrode of the triode V < 1 > and one end of a luminous diode; a triode V < 2 > and the triode V < 1 > are connected into a regenerative feedback mode; the base electrode of the triode V < 2 > is connected with an alarm acoustic circuit; the sensing head is a unidirectional mercury switch, which is arranged in a sealed cylinder-shaped glass cavity; a mercury drop is poured in the sealed cylinder-shaped glass cavity and a positive electrode and a negative electrode which are respectively long and short are arranged in the sealed cylinder-shaped glass cavity; the alarm acoustic circuit is composed of four acoustic alarm sheets, a piezoelectric ceramic sheet and an output transformer. The utility model has the advantages of high sensitivity, convenient regulation, visual regulation, memory function for vibration, small size, portability, convenient installation and low cost.

Description

The micro-earthquakes alarm

The utility model relates to a kind of micro-earthquakes alarm, belongs to the fine motion automatic detection and control device.

At present, people are when the various fine motion detecting device sensing head of design, and most of mechanical system that adopts promptly utilizes various springs to make the mode of intermediary.At the spring top prill is installed, when vibration takes place, bead swing and cylinder type metal housing contacts, the circuit instantaneous short circuit starts supporting electronic circuit, reaches the purpose that detects control.

The mechanical sensing mode of this kind is influenced by structure and material, in actual applications, has a large amount of defectives:

1, complex manufacturing-spring requires vertical with right cylinder concentric;

2, volume is big;

3, sensitivity adjusting difficulty-sensitivity is relevant with the right cylinder gap with Metal Ball;

4, sensitivity low-be subjected to material aging, deformation effect, above-mentioned gap can not be too little;

5, spring material is required height;

6, cost height.

General warning device reminds people strick precaution in time or hide when earthquake takes place, therefore the huge infringement that human life's property is caused, so in time alarm when this series products must or take place before earthquake takes place, reminds people is adopted an effective measure, and avoids or reduces life and property loss.

The purpose of this utility model is exactly to provide a kind of micro-earthquakes alarm at the deficiency of prior art, mechanism and effect that it can utilize earth earthquake to produce, sound, acoustic alarm in time when (several-tens seconds) or earthquake take place before earthquake, reminds people is adopted an effective measure, and avoids or reduces life and property loss.

The purpose of this utility model is achieved in that a kind of micro-earthquakes alarm, it is by sensing head, control circuit and housing are formed, the first emitter that terminates at power supply and triode V1 of sensing wherein, the collector of another termination triode V1 and an end of light emitting diode, triode V2 and triode V1 connect and are the positive feedback form, the base stage of triode V2 sound circuit taking alarm.

Connect between the base stage of the collector of triode V1 and triode V2 and establish cancel switch K1.The alarm sound circuit is made up of four tones of standard Chinese pronunciation alarm and piezoelectric ceramic piece and output transformer.Between the base stage of triode V1 emitter and triode V2 and be connected to Test Switchboard K2.

Described sensing head can two.

Described sensing head is unidirectional mercury cut-off, and device is at O-ring column type glass chamber, and irritate the inside has a mercury to drip and positive and negative two utmost points that are equipped with that one is long and the other is short, and horizontal welding is connected on the printed circuit board (PCB).

Described sensing head is length L≤3mm, diameter phi≤3mm.

According to the technique scheme analysis as can be known, the utility model newspaper adopts the sensing head and the supporting electronic circuit of recent studies on design, has solved the problems of the prior art preferably.It has following characteristics:

1, highly sensitive;

2, sensitivity adjusting is convenient directly perceived;

3, have the vibration memory function, when certain once vibrates generation and after taking place, can constantly report to the police;

4, power saving.Under the state of alert, the coupling electrode is few, improves battery serviceable life;

5, manual measuring ability is arranged, be convenient to this product of the daily detection of user, prevent that product or battery failure from can not in time report to the police;

6, manual detection and false alarm removing function are arranged;

7, sound, light are reported to the police simultaneously, and chimes of doom reminds the user in time to adopt an effective measure greater than 110 decibels;

8, adopt No. 5 common batteries power supplies, make things convenient for the user to choose the replacing battery;

9, volume is small and exquisite, and installation is easy to carry;

10, with low cost, be more suitable for market competition.

The utility model is described in more detail below in conjunction with accompanying drawing and specific embodiments.

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is the structural representation of sensing head of the present utility model.

Referring to Fig. 1,2, the utility model mainly detects sensing head by fine motion and supporting control circuit is formed.

According to the earthquake principle as can be known, earthquake is that the earth part earth's crust changes the sharp pounding that the back produces violent moving for a certain reason.During earthquake, because sharp impacts, the extruding of the part earth's crust, can produce in the earth's crust and propagate two kinds of ripples: a kind of is compressional wave, and it spreads out of with prestissimo from need, does not generally have destruction; Another kind is shearing wave (shear wave), it generally slow tens seconds than compressional wave, its impulsive force can destroy ground all.(seismograph in Ancient Chinese generation just is based on the manufacturing of this earthquake fluctuation propagation principle and forms).When utilizing the generation of seismic event and communication theory and ripple in liquid, to propagate, liquid can absorb the energy of ripple and the physical principle of stimulated oscillation and the physical characteristics that spherosome easily rolls, therefore utilize mercury to design and manufacture the sensing head of following planform, it can the very sensitive existence that detects seismic event.

Sensing head S1, S2 are two O-ring column type glass chambers, and irritate the inside has a mercury to drip and positive and negative two utmost points that are equipped with that one is long and the other is short, and this structure is unidirectional mercury cut-off, but best length L≤3mm, diameter phi≤3mm, and mercury can not pour into too many, drip the rolling smoothness with mercury and exceed.Thereby guarantee that little mercury drips the few energy of acquisition and can roll.Two this mercury cut-off horizontal weldings are connected on the printed circuit board (PCB), after debugging is good, is sealed in the little plastic housing with glue and gets final product.

This sensing head is very sensitive, and when seismic event transmitted, rollings of quivering that can impulse of little mercury bulb caused the positive and negative electrode instantaneous short circuit, generation signal pulse control level.The debugging of sensing head sensitivity is distinguished by sensitivity, can make plurality of specifications, to satisfy multiple needs.Debug very simple, convenience, i.e. two mercury cut-off horizontal positioned welding, sensitivity is the highest; Down stir two mercury cut-off heads.Sensitivity reduces, and it is big more to stir angle, and sensitivity is low more.

Corresponding electronic control circuit is produced by trigger control circuit and chimes of doom and output circuit is formed.Wherein trigger control circuit provides the seismic signal impulse level for alarm circuit; Guides user is correctly installed this device and is provided light emitting diode glittering when reporting to the police.Triode V1, V2 design effort are at strong positive feedback state in this circuit, when alarm correctly installs, after K switch 1 is closed, this moment, alarm entered the state of alert, as shown in Figure 2, the collector of V1, V2 is added with working inverse voltage, and triode ends, and circuit is power consumption hardly under the state of alert.In case there is transient voltage to be added in the E point, be sensing head S1, S2 or K2 instantaneous short circuit, V1, V2 are owing to be operated in the positive feedback state, rapid saturation conduction, E point current potential is approximately equal to supply voltage (deducting the pressure drop of V1 saturation conduction), trigger voltage was disappeared, because the discharge effect of capacitor C has still guaranteed V1, V2 saturation conduction.

When this alarm of user installation, according to the characteristic of above-mentioned sensing head, when alarm up and down during the center line out of plumb, S1 or S2 conducting, the light emitting diode conducting is luminous, instructs (promptings) user that (installation method regard sb. as an outsider sight structural sections) in detail correctly is installed.

Simultaneously, select V1, V2 design trigger circuit for use, both can improve E point current potential, help improving sound intensity; Triode is low and easy buying than controllable silicon price.

In the alarm sound output circuit, for improving functional reliability and volume, raise the efficiency, reduce volume and cost, adopted four tones of standard Chinese pronunciation alarm PM9561 and piezoelectric ceramic piece and match help the operatic tunes and output transformer, make output volume greater than 110 decibels.

During user installation, at first open K1 switch (position, pass) and load onto battery, vertical ground is at a distance of the hole that L bores two dark 15mm with φ 6 percussion bits on the wall, and φ 6 plastics of packing into the pipe that rises is slightly fixed alarm on the wall with self-tapping screw, owing to measure and operate miss, alarm possibility out of plumb ground, this moment, light emitting diode meeting conducting was luminous, reminded the user, the user is translation alarm lower end slightly, extinguishes until light emitting diode.Tighten upper and lower two self-tapping screws this moment, fixes alarm, the K1 switch that closes (position of opening), and alarm is in the normal armed duty, and the user installation process finishes.

Among the figure K2 for manually detect button be used to detect this alarm can operate as normal; K1 is the alarm release switch, when K1 opens, has destroyed the positive feedback condition of work of V1, V2, and capacitor C is discharged by resistance R.Close behind the K1, circuit is in the original state of alert again.When whether the detection alarm device is working properly, clicks K2 key (test) alarm and can warn your writing, diode is glittering.Remove to report to the police as desire, the K1 switch is pushed the position of pass, get back to the initial alert state again.

Claims

1, a kind of micro-earthquakes alarm, it is by sensing head, control circuit and housing are formed, it is characterized in that: the first emitter that terminates at power supply and triode V1 of described sensing, the collector of another termination triode V1 and an end of light emitting diode, triode V2 and triode V1 connect and are the positive feedback form, the base stage of triode V2 sound circuit taking alarm.

2, micro-earthquakes alarm according to claim 1 is characterized in that: connect between the base stage of the collector of triode V1 and triode V2 and establish cancel switch K1.

3, micro-earthquakes alarm according to claim 1 is characterized in that: the alarm sound circuit is made up of four tones of standard Chinese pronunciation alarm and piezoelectric ceramic piece and output transformer.

4, micro-earthquakes alarm according to claim 1 is characterized in that: between the base stage of triode V1 emitter and triode V2 and be connected to Test Switchboard K2.

5, micro-earthquakes alarm according to claim 1 is characterized in that: described sensing head can two.

6, micro-earthquakes alarm according to claim 1, it is characterized in that: described sensing head is unidirectional mercury cut-off, device is at O-ring column type glass chamber, and irritate the inside has a mercury to drip and positive and negative two utmost points that are equipped with that one is long and the other is short, and horizontal welding is connected on the printed circuit board (PCB).

7, micro-earthquakes alarm according to claim 6 is characterized in that: described sensing head is length L≤3mm, diameter phi≤3mm.