CN204087439U - A kind of detecting alarm - Google Patents
A kind of detecting alarm Download PDFInfo
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- CN204087439U CN204087439U CN201420536233.9U CN201420536233U CN204087439U CN 204087439 U CN204087439 U CN 204087439U CN 201420536233 U CN201420536233 U CN 201420536233U CN 204087439 U CN204087439 U CN 204087439U
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Abstract
The utility model discloses a kind of detecting alarm, comprising: the center that a microprocessor is used for described detecting alarm controls and signal transacting; One sensor is connected to microprocessor, and sensor, by processor Time-sharing control heating power, realizes same sensor timesharing and detects gas with various; One temperature detection control circuit is connected to microprocessor, and temperature detection control circuit realizes temp sensing type fire alarm by temperature detection, and using the temperature that detects as temperature compensation input pickup, carries out the correction of the testing result of sensor.
Description
Technical field
The utility model relates to a kind of detecting alarm, can detect the detecting alarm of at least two kinds of gas with various while of particularly relating to a kind of.
Background technology
In current life of urban resident, almost every household all can use combustion gas, in different regions, the gas families used is different, has rock gas (principal ingredient methane), liquefied gas (principal ingredient propane), coal gas (principal ingredient hydrogen or carbon monoxide).Due to specific physical, the chemical attribute of combustion gas, the security of its application particularly merits attention.In order to ensure the person and the safety of property, there is now the product of various detection gas leakage warning on the market, also having various patented technology.By the analysis to existing gas alarm product, discovery is all the warning of pure gas kind, such as only detects methane or propane, or only detects carbon monoxide or hydrogen.Its object is only and prevents the leakage of burning line from meeting accident.
Main application no matter for which kind of gas utensil (gas heater, fuel wall hanging dual-purpose stove, gas kitchen ranges) combustion gas is burning, as long as just likely there is rough burning phenomenon in burning, rough burning will produce carbon monoxide, carbon monoxide is toxic and harmful, it is annual because the casualty accident that anthracemia causes happens occasionally, appear in the newspapers end repeatly, so kitchen safety is the important topic that relevant departments carry out studying always.Another one security fields in kitchen are fire prevention, so often can place fire detector in kitchen.The security precautions of individual user is comparatively strong, can install Fuel Gas Leak Alarm, carbon monoxide alarm, fire-alarm respectively, to tackle different abnormal accidents.Multiple alarm detector will be laid in such kitchen, very large waste is caused to social resources.
So some producers just develop the alarm that can detect two kinds of gases, such as methane and carbon monoxide.Its object is exactly the carbon monoxide of the insufficient generation of gas leakage and fuel gas buring in order to prevent kitchen.But this series products majority existing is employing two gas sensors, detects methane and carbon monoxide respectively.Because the Wuli-Shili-Renli system approach of these two kinds of gases is inconsistent, the principle of work detecting the sensor of this two classes gas is also inconsistent, and most semiconductor or catalytic combustion type sensor of adopting detects methane, uses electrochemical transducer[sensor to detect carbon monoxide.Its mission life of the sensor of two kinds of different principle and technological disparity differ greatly, so can cause the life-span of whole alarm " shortening ", technical feature " narrows ", and cost also increases simultaneously.
Because alarm needs power supply, or need externally to provide IO interface, connection wire must be had.By the installation requirement of building structure with other equipment, required connection wire length is uncertain.In general alarm with wire slightly have more than needed, not the scene of advising go increase wire, remaining wire may be had when so just causing connecting at the scene, if unnecessary wire is cut, just fall short of once its wire of needs mobile device.If do not cut unnecessary wire, then just use unsightly in the family.
General electrical equipment or product have its mission life, generally have now the life-span of correlation standard electric equipment products.For ordinary consumer, do not know that these specify, and also generally cannot remember product be when buy or dispatch from the factory, the product immediately had posts life-span overdue mark, and user is generally also difficult to check or notice.Particularly for security products, once exceed its mission life, just lose guarantee for consumers, equal, " deception " consumer, to considerably increase potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of detecting alarm, cannot detect at least two kinds of gases to overcome same acquisition sensor in prior art, the life of product caused is affected simultaneously, increases cost, and cannot safety instruction be carried out, the security hidden trouble brought to the life-span of product.
For achieving the above object, the utility model provides a kind of detecting alarm, it is characterized in that, comprising:
One microprocessor: the center for described detecting alarm controls and signal transacting;
One sensor: be connected to described microprocessor, described sensor, by described processor Time-sharing control heating power, realizes same sensor timesharing and detects gas with various;
One temperature detection control circuit: be connected to described microprocessor, described temperature detection control circuit realizes temp sensing type fire alarm by temperature detection, and the temperature detected is inputted described sensor as temperature compensation, carry out the correction of the testing result of described sensor.
Above-mentioned detecting alarm, is characterized in that, described gas with various is two kinds of gases, and these two kinds of gases are: methane and carbon monoxide; Or, propane and carbon monoxide; Or, hydrogen and carbon monoxide.
Above-mentioned detecting alarm, is characterized in that, also comprises:
A pair outer linkage control circuit: be connected to described microprocessor, externally exports the system state level of described detecting alarm, carries out external unit coordinated signals;
One telecommunication circuit: be connected to described microprocessor, externally exports the system signal of described detecting alarm, carries out correspondence with foreign country.
Above-mentioned detecting alarm, is characterized in that, also comprises: be connected to a power circuit of described microprocessor, a smooth indicating circuit and an audible alarm circuit.
Above-mentioned detecting alarm, is characterized in that, also comprises:
Multiple external interface, is connected to described microprocessor, for exporting the alerting signal of described detecting alarm or obtaining input instruction from peripheral hardware.
Above-mentioned detecting alarm, it is characterized in that, based on the signal that described sensor gathers, described microprocessor carries out that exportable system after analysis is normal, gas alarm or system fault condition, and, described microprocessor can judge the mission life of described sensor, and carries out prompting tenure of use and fault alarm.
Above-mentioned detecting alarm, is characterized in that, described sensor also comprises a sensitive material operating circuit, this circuit working is in different temperature, described sensitive material, by different working temperatures, to the change of gas with various performance different resistance values, and then makes same sensor detect gas with various.
Above-mentioned detecting alarm, is characterized in that, described temperature detection control circuit also comprises a thermistor, and described thermistor and fixed resistance dividing potential drop, carry out voltage detecting output, and according to preset temperature threshold value, the normal or high temperature alarm state of output system.
Above-mentioned detecting alarm, is characterized in that, described multiple external interface comprises electric capacity output interface, direct current output interface, passive relay output interface, serial communication interface.
Above-mentioned detecting alarm, it is characterized in that, when methane oxidizing archaea or carbon monoxide surpass concentration normal time, described electric capacity output interface and described direct current output interface all export high resistant, described passive relay output interface exports normal ON signal, and described alarm exports normal condition; When after described alarm equipment alarm, described passive relay output interface exports normally closed signal, described alarm output alarm state.
Compared with prior art, the utility model has the following advantages: the sensor that the detecting alarm that the utility model provides adopts can detect at least two kinds of gas with various simultaneously; Detecting alarm employing dish wire casing design of the present utility model, can be wound around unnecessary power lead, improve the aesthetic degree that product uses; Meanwhile, detecting alarm of the present utility model provides product prompting function in serviceable life, improves product safety in utilization.
Accompanying drawing explanation
Fig. 1 is the board structure of circuit schematic diagram of the utility model detecting alarm;
Fig. 2 is the Facad structure schematic diagram of detecting alarm of the present utility model;
Fig. 3 is the side structure schematic diagram of detecting alarm of the present utility model;
Fig. 4 is the lower cover shell structure schematic diagram of detecting alarm of the present utility model.
Wherein, Reference numeral:
10 microprocessor 20 sensors
30 temperature detection control circuits 40 are linkage control circuit externally
50 telecommunication circuit 60 power circuits
70 smooth indicating circuit 80 audible alarm circuit
90 external interfaces
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, but not as to restriction of the present utility model.
As shown in Figure 1, a kind of detecting alarm that the utility model provides, comprising: microprocessor 10, sensor 20, temperature detection control circuit 30, externally linkage control circuit 40, telecommunication circuit 50, power circuit 60, light indicating circuit 70, audible alarm circuit 80 and multiple external interface 90.
Wherein, microprocessor 10: the center for detecting alarm controls and signal transacting; Based on the signal that described sensor gathers, microprocessor carries out that exportable system after analysis is normal, gas alarm or system fault condition, and described microprocessor can judge the mission life of described sensor, and carries out prompting tenure of use and fault alarm.
In the present embodiment, microprocessor uses microchip company PIC16F73 single-chip microcomputer, judges and export complete machine duty by single-chip microcomputer.When complete machine working properly and without any warning time, complete machine is in normal operating conditions, Single-chip Controlling display normal condition or do not show any state; When complete machine working properly and detect gas alarm or carbon monoxide exceed or temperature alarming time, Single-chip Controlling display alarm state or send signal other equipment linkages are reported to the police; When microprocessor detect inputs to abnormal signal, if GAS terminal voltage in Fig. 1 is 0V, this signal can not occur in normal operation of sensor, detect that this signal means the short circuit of sensor pin, then complete machine exports fault-signal immediately, prompting complete machine is in malfunction, Single-chip Controlling display malfunction.This example can point out short circuit sensor, open circuit fault, thermistor open circuit, short trouble etc.Because sensor has life-span limit value, added up the actual run time of product by the program of single-chip microcomputer.When sensor adds up service time and exceed after it promises to undertake life-span, single-chip microcomputer according to timing degree prompting sensor failure fault, and sends acousto-optic alarm, prevents sensor to extend service in the army the detection Problem of Failure caused.
Sensor 20: be connected to microprocessor 10, sensor 10, by microprocessor 10 Time-sharing control heating power, realizes same sensor 20 timesharing and detects gas with various;
Sensor 20 also comprises a sensitive material operating circuit, and this circuit working is in different temperature, and described sensitive material, by different working temperatures, to the change of gas with various performance different resistance values, and then makes same sensor detect gas with various.Sensor 20 gathers gas by the air admission hole 4 of probe body, carries out gas detect.
The utility model uses a semiconductor-type sensors, realizes the detection of two kinds of gases, detects methane and carbon monoxide simultaneously, or propane and carbon monoxide, or hydrogen and carbon monoxide.So just can detect gas leakage alarm simultaneously, and the carbonic oxide alarming of the insufficient generation of burning.While carrying out gas detect, increase temperature detection, realize the fire alarm of temp sensing type, this is also the relevant safety regulations meeting Chinese kitchen.Such cost of products reduces, and the life-span of product also can not influence each other because of the characteristic of two kinds of gases simultaneously, makes user buy a Realization of Product multiple protective, also saves social resources.
The utility model specific embodiment adopts Japanese FIS company SB-95 semiconductor-type sensors, by controlling the heating power of sensor, make the sensitive material circuit working of its inside in different temperature, its sensitive material just reveals distinctive sensitivity characteristic (change of output resistance) to different gas meters, and then detects the gas needing to detect.According to the alarm threshold of processor internal preset, just can realize gas and surpass thresholding warning.By the heating power of processor Time-sharing control sensor, realize timesharing and detect different gas, and then realize using same sensor to detect the function of gas with various.
SB-95 sensor can detect methane and carbon monoxide two kinds of gases according to different heating-up temperatures.When sensor is in high power heating process, sensor is in CH_4 detection process, now sensor concentration of methane gas signal can be converted to electric signal by GAS end be input in single-chip microcomputer.Single-chip microcomputer collects this signal and compares according to presetting alerting signal, judges in current environment, whether methane exceedes setting value.When sensor is in low-power heating process, sensor is in Carbon Monoxide Detection process, and now sensor can convert carbon monoxide gas concentration signal to electric signal, the similar methane process of processing mode of single-chip microcomputer.Single-chip microcomputer holds the switch of control V1MOS pipe by HEAT, and then controls the heat energy size of sensor, realizes the switching of high power heating and low-power heating, and then realizes the function that a sensor detects two kinds of gas alarm simultaneously.
Temperature detection control circuit 30: be connected to microprocessor 10, temperature detection control circuit 30 realizes temp sensing type fire alarm by temperature detection, and using the temperature that detects as temperature compensation input pickup 20, carries out the correction of the testing result of sensor 20.
Temperature detection control circuit 30 also comprises a thermistor 301, use thermistor 301 and fixed resistance dividing potential drop, detection voltage exports, according to the temperature characterisitic (corresponding relation of temperature and resistance value) of thermistor 301, by the computing function of processor, just can calculate current temperature, then according to the alarm threshold of processor inside, just can realize temperature alarming function.
Use thermistor RT, resistance R1 to form temperature sensing circuit in this example, the different manifestations of thermistor RT environmentally temperature goes out different resistance values, and then exports the magnitude of voltage of different size from resistance R1.Single-chip microcomputer is by this change in voltage of TEMP Port detecting and derive the size of current temperature value, goes out currently whether to occur that overtemperature is dangerous according to the characteristic analysis of temperature variation simultaneously.This temperature is also as temperature compensation input simultaneously, for the calculating correction of These gases sensor.In order to the change of better testing environment temperature, the non-sensitive part of thermistor RT leans out alarm host machine outside from alarm inside, and as shown in Figure 2 to 4, in order to protect thermistor 301, this warning utensil has temperature sensing cage 1.In this example, temperature sensing cage 1 is positioned at the front surface of upper cover housing 2, by different mould moldings during production.A firmly upper cover is combined into by viscose glue or the mode such as heat seal, distortion insertion after two structural member processing.During final assembly, thermistor 301 appears hole through between outside and temperature sensing cage 1 from upper cover housing 2, and then again can available protecting thermosensitive device while realizing temperature detecting function.This temperature sensing cage 1 adopts claw-like structures; the multiple parallel pawl pin comprising a disk-like structure and stretch out from this disk-like structure periphery; this temperature sensing cage 1 can prevent the object contact of diameter more than 5 ~ 8 millimeters to the non-sensitive part of thermistor 301, and then again can available protecting thermosensitive device while realizing temperature detecting function.
External linkage control circuit 40: be connected to microprocessor 10, externally exports the system state level of detecting alarm, carries out external unit coordinated signals;
After warning is detected for alarm, some external units can be controlled as required, such as: start blower fan air draft, valve-off, close other device power supply (DPS)s, start external acousto-optical etc.Concrete opertaing device object is different, and its circuit interface is different, and can adopt relay, controllable silicon, transistor, metal-oxide-semiconductor etc., its circuit engineering is current techique, no longer discusses in detail herein.
Telecommunication circuit 50: be connected to microprocessor 10, externally exports the system signal of detecting alarm, carries out correspondence with foreign country.
The external communication function of Realization of Product can have diversified hardware technology scheme and software engineering scheme, and the communication as digital quantity can have: Transistor-Transistor Logic level, RS232, RS485, CAN communication, distribution line carrier etc.; The communication of switching value has: PWM pulsewidth, switching value level, the output of light-coupled isolation level etc.; Also can by wired mode or wireless mode etc., can be one-way communication also can be both-way communication.Its technology maturation and general, no longer discusses in detail herein.The object of external communication is that this product is had mutual interface with extraneous, is convenient to the extraneous related data or the state that obtain this product, or controls this product.This product has the interface function to other equipment, such as this Product Status can be passed to gas utensil, carries out other further action process by gas utensil.
Further, power circuit 60, smooth indicating circuit 70 and an audible alarm circuit 80 of microprocessor 10 is connected to.
General circuit operationally all needs power supply, and its power technology is very ripe, and technology is also general, can adopt a lot of scheme to realize, and no longer discusses in detail herein.
Light indicating circuit 70 can adopt LED light emitting diode, or charactron, or LCD display, can show the running status of product, and such as sensor preheating, fault, warning, interlock export instruction, communication LED status.Its circuit engineering is current techique, no longer discusses in detail herein.
Acoustic alarm indicating circuit 80 can adopt loudspeaker or hummer.When alarm has abnormal (fault or warning) send different sound or tone and report to the police, come into the picture.Its circuit engineering is current techique, no longer discusses in detail herein.
Further, this detecting alarm, also comprises:
Multiple external interface 90, is connected to microprocessor 10, for exporting the alerting signal of detecting alarm or obtaining input instruction from peripheral hardware.Described multiple external interface comprises electric capacity output interface, direct current output interface, passive relay output interface, serial communication interface.
Multiple external interface in this combustible gas detecting alarm inputs instruction accordingly to the alerting signal of alarm be exported or obtaining from peripheral hardware.This interface mode is varied, there are in this example electric capacity output interface, direct current output interface, passive relay output interface and TTL serial communication interface etc. simultaneously, when alarm does not detect methane oxidizing archaea or carbon monoxide surpasses concentration, electric capacity output interface, direct current output interface all export high resistant, passive relay exports normal ON signal, uses during TTL communication interface inquiry alarm status and exports normal operating conditions; When after alarm equipment alarm, the electromagnetic valve that electric capacity output interlock is attached thereto or mechanical arm etc., direct current exports high level and also drives other external units be attached thereto, and passive relay exports normally closed signal, uses TTL communication interface inquiry alarm status alarm device output alarm state.
Certainly, according to the difference of functional requirement, the function of external output interface is also varied.As aforementioned direct current output interface may export high level when alarm normal condition; and state switches to direct current low level or pulse signal etc. after warning; enumerate its various output state combination herein no longer one by one; but by this kind of form or similar this kind of form, alerting signal is outputted to other external units or the process from external unit acquisition signal, the claim all by this utility model is protected.
In addition, connect wire lingering effect room problem attractive in appearance for solving, this alarm devises the structure that can be wound around residue wire, is wrapped on product base by unnecessary wire, makes product appearance clean and tidy.
As shown in Figure 2, this example mid-game wire casing 8 is between alarm lower cover housing 5 and mounting disc 6.Lower cover housing 5 and mounting disc 6 are respectively by two pieces of mould moldings, between lower cover housing 5 and mounting disc 6, a reelable dish wire casing 8 is formed after lower cover housing 5 and mounting disc 6 being assembled in production, have the locating device 7 of a fixed cable in the bottom of lower cover, this locating device 7 is a location snap fit simultaneously.Complete machine produce time or in-site installation time, unnecessary wire can be wrapped in this dish wire casing 8, be fixed to by wire after winding on the locating device 7 bottom lower cover, cabling unnecessary so is just perfectly hidden into complete machine inside, serves effect attractive in appearance.
The utility model is to disclose as above; but above-described embodiment just illustrates; and be not used to limit the utility model; those skilled in the art can carry out reasonable variation to above-described embodiment according to actual needs, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the utility model.
Claims (10)
1. a detecting alarm, is characterized in that, comprising:
One microprocessor: the center for described detecting alarm controls and signal transacting;
One sensor: be connected to described microprocessor, described sensor, by described microprocessor Time-sharing control heating power, realizes same sensor timesharing and detects gas with various;
One temperature detection control circuit: be connected to described microprocessor, described temperature detection control circuit realizes temp sensing type fire alarm by temperature detection, and the temperature detected is inputted described sensor as temperature compensation, carry out the correction of the testing result of described sensor.
2. detecting alarm according to claim 1, it is characterized in that, described gas with various is two kinds of gases, and these two kinds of gases are: methane and carbon monoxide; Or, propane and carbon monoxide; Or, hydrogen and carbon monoxide.
3. detecting alarm according to claim 1, is characterized in that, also comprise:
A pair outer linkage control circuit: be connected to described microprocessor, externally exports the system state level of described detecting alarm, carries out external unit coordinated signals;
One telecommunication circuit: be connected to described microprocessor, externally exports the system signal of described detecting alarm, carries out correspondence with foreign country.
4. detecting alarm according to claim 1 or 3, is characterized in that, also comprises: be connected to a power circuit of described microprocessor, a smooth indicating circuit and an audible alarm circuit.
5. detecting alarm according to claim 4, is characterized in that, also comprise:
Multiple external interface, is connected to described microprocessor, for exporting the alerting signal of described detecting alarm or obtaining input instruction from peripheral hardware.
6. detecting alarm according to claim 1, it is characterized in that, based on the signal that described sensor gathers, described microprocessor carries out that exportable system after analysis is normal, gas alarm or system fault condition, and, described microprocessor can judge the mission life of described sensor, and carries out prompting tenure of use and fault alarm.
7. detecting alarm according to claim 1, it is characterized in that, described sensor also comprises a sensitive material operating circuit, this circuit working is in different temperature, described sensitive material is by different working temperatures, to the change of gas with various performance different resistance values, and then same sensor is made to detect gas with various.
8. detecting alarm according to claim 1, it is characterized in that, described temperature detection control circuit also comprises a thermistor; described thermistor and fixed resistance dividing potential drop; carry out voltage detecting output, and according to preset temperature threshold value, the normal or high temperature alarm state of output system.
9. detecting alarm according to claim 5, it is characterized in that, described multiple external interface comprises electric capacity output interface, direct current output interface, passive relay output interface, serial communication interface.
10. detecting alarm according to claim 9, it is characterized in that, when methane oxidizing archaea or carbon monoxide surpass concentration normal time, described electric capacity output interface and described direct current output interface all export high resistant, described passive relay output interface exports normal ON signal, and described alarm exports normal condition; When after described alarm equipment alarm, described passive relay output interface exports normally closed signal, described alarm output alarm state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536233.9U CN204087439U (en) | 2014-09-18 | 2014-09-18 | A kind of detecting alarm |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420536233.9U CN204087439U (en) | 2014-09-18 | 2014-09-18 | A kind of detecting alarm |
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| CN204087439U true CN204087439U (en) | 2015-01-07 |
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| CN201420536233.9U Active CN204087439U (en) | 2014-09-18 | 2014-09-18 | A kind of detecting alarm |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240449A (en) * | 2014-09-18 | 2014-12-24 | 天津市浦海新技术有限公司 | Detection alarm |
| CN104977318A (en) * | 2015-03-02 | 2015-10-14 | 深圳市卡卓无线信息技术有限公司 | Gas concentration detection method of carbon monoxide, formaldehyde and alcohol, and mobile terminal |
| CN106526086A (en) * | 2016-12-02 | 2017-03-22 | 浙江莱诺工程技术有限公司 | Gas sensor |
| CN114563447A (en) * | 2020-11-27 | 2022-05-31 | 李玉钦 | Low-power detection method for gas chip of thermal runaway early warning sensor |
-
2014
- 2014-09-18 CN CN201420536233.9U patent/CN204087439U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240449A (en) * | 2014-09-18 | 2014-12-24 | 天津市浦海新技术有限公司 | Detection alarm |
| CN104977318A (en) * | 2015-03-02 | 2015-10-14 | 深圳市卡卓无线信息技术有限公司 | Gas concentration detection method of carbon monoxide, formaldehyde and alcohol, and mobile terminal |
| CN104977318B (en) * | 2015-03-02 | 2019-03-29 | 深圳市卡卓无线信息技术有限公司 | The gas concentration detection method and mobile terminal of carbon monoxide, formaldehyde and alcohol |
| CN106526086A (en) * | 2016-12-02 | 2017-03-22 | 浙江莱诺工程技术有限公司 | Gas sensor |
| CN114563447A (en) * | 2020-11-27 | 2022-05-31 | 李玉钦 | Low-power detection method for gas chip of thermal runaway early warning sensor |
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