CN204215537U - Contactless fire alarm - Google Patents
Contactless fire alarm Download PDFInfo
- Publication number
- CN204215537U CN204215537U CN201420712889.1U CN201420712889U CN204215537U CN 204215537 U CN204215537 U CN 204215537U CN 201420712889 U CN201420712889 U CN 201420712889U CN 204215537 U CN204215537 U CN 204215537U
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- CN
- China
- Prior art keywords
- amplifier
- switch
- fire alarm
- hall
- electric signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fire Alarms (AREA)
- Alarm Systems (AREA)
Abstract
The utility model relates to a kind of contactless fire alarm, belongs to technical field of fire control.Contactless fire alarm comprises: pushbutton switch, hall-effect switch, amplifier, comparer, isolator, controller and communication module, and wherein, hall-effect switch is for responding to pushbutton switch degree of closeness, and its output terminal is connected to amplifier; The electric signal that amplifier exports for amplifying hall-effect switch; Comparer compares for the electric signal that makes amplifier export and a threshold values; The electric signal that isolator is used for comparer exports is isolated, its output terminal connection control device; Communication module is connected to controller by level switch module, is provided with magnet in pushbutton switch.The contactless fire alarm that the utility model provides can prevent misoperation.
Description
Technical field
The utility model relates to a kind of contactless fire alarm, belongs to technical field of fire control.
Background technology
The major function of manned fire alarm of the prior art allows user to send signal in fire alarm control panel.Described panel is arranged on the position such as train, corridor.Under normal circumstances, when find the condition of a fire time, more early warning, property and human loss fewer.Once startup fire alarm, fire alarm system gives the alarm to the people of predetermined quantity.This is usually directed to buildings resident family, fire brigade or municipal fire department.After sending warning, corresponding crowd responds.Such as when fire alarm starts, by sending target location to nearest applicable unit, local municipal sector responds to fire alarm.Alarm also causes the response from local police and ambulance service.The fire alarm of contact-making switch type is very responsive to mechanical fault, and a kind of main cause causing these mechanical faults is environmental baseline.Such as, fire alarm is positioned at open air, parking lot, factory, chemical plant and refinery.These severe rugged environments cause polluting, the functipnal capability of the switch machine of interference contact fire alarm.In order to ensure the functipnal capability of switch, equipment needs periodic maintenance.Fire alarm periodic maintenance requires to coordinate with local emergency personnel and/or alarm monitoring companies, and such as warning system needs to be closed or to need notice municipality to keep in repair.Thus, desirable to provide a kind of fire alarm be activated based on non-contact switch.In addition, desirable to provide a kind of non-contact switch, this switch can be avoided unexpected tripping operation or start reporting to the police when affected by some conditioned disjunction.
Summary of the invention
For overcoming the technical matters existed in prior art, goal of the invention of the present utility model is to provide a kind of contactless fire alarm, and it can be prevented from accidental activation.
For realizing described goal of the invention, goal of the invention of the present utility model is to provide a kind of contactless fire alarm, it comprises: hall-effect switch, pushbutton switch, amplifier, comparer, isolator, controller and communication module, wherein, hall-effect switch is for responding to pushbutton switch degree of closeness, and its output terminal is connected to amplifier; The electric signal that amplifier exports for amplifying hall-effect switch; Comparer compares for the electric signal that makes amplifier export and a threshold values; The electric signal that isolator is used for comparer exports is isolated, its output terminal connection control device; Communication module is connected to controller by level switch module, is provided with magnet in pushbutton switch.
Compared with prior art, the contactless fire alarm that the utility model provides, can prevent from being accidentally.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the contactless fire alarm that the utility model provides.
Embodiment
Fig. 1 is the circuit diagram of the contactless fire alarm that the utility model provides.As shown in Figure 1, the contactless fire alarm that the utility model provides comprises: pushbutton switch, hall-effect switch, amplifier, isolator, controller and communication module, wherein, hall-effect switch is for responding to pushbutton switch degree of closeness, and its output terminal is connected to amplifier; The electric signal that amplifier exports for amplifying hall-effect switch; The electric signal that isolator is used for amplifier exports is isolated, its output terminal connection control device; Communication module is connected to controller by level switch module, is provided with magnet in pushbutton switch.
The signal output part of hall-effect switch connects amplifier by resistance R1, described amplifier is the in-phase proportion amplifier be made up of operational amplifier OP2 and peripheral resistance R2, R3, between the output terminal that resistance R2 is connected to operational amplifier OP and inverting input, between the inverting input that resistance R3 is connected to operational amplifier OP and common port.The output terminal of amplifier is connected to comparer.Comparer is made up of operational amplifier OP1 and adjustable resistance RW1, and the movable end of adjustable resistance RW1 is connected to the in-phase end of operational amplifier, and the first stiff end is connected to power supply+12V, and the second stiff end is connected to common port.The output terminal of operational amplifier OP1 is connected to photoisolator, the light emitting diode of described photoisolator is connected to power supply+12V through resistance R4, the collector of photodiode is connected to power supply+5V through resistance R5, and collector is also connected to an input end of controller, and emitter connects common port.First output terminal of controller is connected to the base stage of transistor TR1 through resistance R6, the collector of transistor TR1 is connected to power supply+12V by resistance R7, light emitting diode successively, and emitter connects common port.Second output terminal of controller is connected to the base stage of transistor TR2 through resistance R8, the collector of transistor TR2 is connected to power supply+12V by local alarm, and emitter connects common port.The signal level that controller exports by level switch module is converted to the level required for communication module, the electric signal that level switch module exports by communication module to be modulated on high frequency and to send dual-mode antenna to, and dual-mode antenna is used for that the electric signal that communication module will send is converted to electromagnetic wave and is then transmitted into space.
The course of work of the contactless fire alarm that the utility model provides is as follows:
When pushbutton switch is moved by " non-start up " to " startup " position, the change of magnetic signal is converted to electric signal and is then sent to amplifier by Hall switch, amplifier amplifies it, then send the inverting input of comparer to, when the signal being sent to inverting input is greater than the threshold voltage of comparer, its output terminal output low level signal, now, the light-emitting diodes light of photoisolator is luminous, phototriode conducting and provide a low level signal to controller, controller receives this low level signal and exports high level signal to the first output terminal and the second output terminal, transistor TR1 drives lumination of light emitting diode, the local alarm of transistor driving sends the sound, frame information is provided to Serial output mouth with Time Controller, this frame information comprises the positional information at fire alarm place, frame information gives communication module by passing on after level switch module switching levels, this frame information is modulated on high frequency and then sends dual-mode antenna to by communication module, the electric signal that communication module sends by dual-mode antenna is converted to electromagnetic wave and is then sent to space, and then the terminal of fire control center is sent to by space, or in the mobile phone of user.Fire control center demodulates frame information after receiving this information from high-frequency signal, and then separates frame, therefrom extracting position information, can judge the position of breaking out of fire exactly.
Below by reference to the accompanying drawings, principle of work of the present utility model is described in detail.But those of ordinary skill in the art it should be understood that instructions is only for explaining claims.But protection domain of the present utility model is not limited to instructions.Any those skilled in the art of being familiar with are in the technical scope that the utility model discloses, and the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (1)
1. a contactless fire alarm, comprise: pushbutton switch, hall-effect switch, amplifier, comparer, isolator, controller and communication module, wherein, hall-effect switch is for responding to pushbutton switch degree of closeness, and its output terminal is connected to amplifier; The electric signal that amplifier exports for amplifying hall-effect switch; Comparer compares for the electric signal that makes amplifier export and a threshold values; The electric signal that isolator is used for comparer exports is isolated, its output terminal connection control device; Communication module is connected to controller by level switch module, is provided with magnet in pushbutton switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420712889.1U CN204215537U (en) | 2014-11-13 | 2014-11-13 | Contactless fire alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420712889.1U CN204215537U (en) | 2014-11-13 | 2014-11-13 | Contactless fire alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204215537U true CN204215537U (en) | 2015-03-18 |
Family
ID=52984190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420712889.1U Expired - Fee Related CN204215537U (en) | 2014-11-13 | 2014-11-13 | Contactless fire alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204215537U (en) |
-
2014
- 2014-11-13 CN CN201420712889.1U patent/CN204215537U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20151113 |
|
| EXPY | Termination of patent right or utility model |