CN104574848A - Warning method of fuel gas warning device - Google Patents
Warning method of fuel gas warning device Download PDFInfo
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- CN104574848A CN104574848A CN201510018667.9A CN201510018667A CN104574848A CN 104574848 A CN104574848 A CN 104574848A CN 201510018667 A CN201510018667 A CN 201510018667A CN 104574848 A CN104574848 A CN 104574848A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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Abstract
The invention relates to a warning method of a fuel gas warning device. The first threshold value, the safe concentration change rate and the pre-warning duration of the situation that the fuel gas concentration change rate is higher than the safe concentration change rate are preset in the fuel gas warning device. When the fuel gas concentration change rate is higher than the safe concentration change rate for a time period longer than the pre-warning duration and fuel gas concentration is lower than the first threshold value, the fuel gas warning device is in the pre-warning state and gives a pre-alarm. When fuel gas concentration rises to be higher than the first threshold value, the fuel gas warning device is in the danger alarm state and gives a danger alarm. According to the method, fuel gas users can not panic at hearing a loud danger alarm, the old and children in a house are prevented from getting scared, and disturbance of a tradition fuel gas alarm to users is reduced; due to the fact that users are reminded that fuel gas concentration is rising before fuel gas concentration reaches the alarm threshold value, users can find the reason in time to prevent dangers, and safety is improved.
Description
Technical field
The present invention relates to signal alarm technical field, particularly relate to a kind of alarm method of gas alarm device.
Background technology
Along with the combustion gas such as coal gas, rock gas, biogas enter most of family as a kind of energy that is clean, environmental protection, for ensureing the use safety of combustion gas, fuel gas alarm is also universal gradually to come.The alarm method of the gas security now commercially sold is: presetting a threshold value more much lower than dangerous concentrations (is generally 25%LEL, namely explosion ratio lower limit 25%), namely sound and light alarm signal is sent higher than this threshold value when monitoring gas concentration in environment, user manually can cancel sound and light alarm signal or after removing dangerous matter sources, sound and light alarm signal is cancelled, automatically as shown in the time diagram of Fig. 1.
The shortcoming of this method is, because alarm threshold value step-up error is large, can create disturbances to, also need user to make a desperate move and close warning because of false alarm to user's generation.Therefore need a kind of fuel gas alarm, while adopting new alarm method can ensure to provide enough warnings accurately and timely, user is not caused and create disturbances to.
Summary of the invention
The object of the invention is to the defect for overcoming prior art, and a kind of alarm method of gas alarm device is provided.
For achieving the above object, the present invention by the following technical solutions: a kind of alarm method of gas alarm device, comprises the steps:
Preset first threshold value, safe concentration rate of change and early warning duration in gas alarm device;
Be greater than early warning duration when gas concentration rate of change continues duration higher than safe concentration rate of change, but gas concentration is lower than the first secure threshold, gas alarm device enters pre-alarm state, sends pre-alarm signal;
When gas concentration is higher than first threshold, gas alarm device enters danger warning state, sends danger alarm signal.
Further, described danger warning state manually cannot be cancelled by user, automatically can only cancel at the gas concentration detected lower than first threshold.
Further, in gas alarm device, be also provided with the Second Threshold lower than first threshold;
When gas concentration rate of change is higher than safe concentration rate of change and this state continues duration is greater than early warning duration, when gas concentration is higher than Second Threshold but lower than first threshold, gas alarm device enters abnormal alarm state, sends abnormal alarm.
Further, in gas alarm device, be also provided with the 3rd threshold value lower than Second Threshold;
Danger warning state manually cannot be cancelled by user, only has when gas concentration being detected lower than the 3rd threshold value, and gas alarm device is cleared alarm condition, enters normal condition.
Further, the first abnormality alarm duration, the second abnormality alarm duration is preset in gas alarm device, when gas alarm device is greater than the first abnormality alarm duration at the duration of normal condition and pre-alarm state work, and detect that gas concentration is higher than Second Threshold, gas alarm device enters abnormal alarm state by precaution alarm state;
Described abnormal alarm state is cancelled lower than Second Threshold or the 3rd threshold value automatically at the gas concentration detected, also manually can be cancelled by user;
If manually cancel abnormal alarm state, after the continuous working duration being less than the second abnormality alarm duration, gas alarm device is because detecting that gas concentration enters abnormal alarm state again higher than Second Threshold, this abnormal alarm state manually cannot be cancelled by user, only automatically cancels lower than Second Threshold or the 3rd threshold value at the gas concentration detected.
Described first abnormality alarm duration is greater than early warning duration, and the first abnormality alarm duration is greater than the second abnormality alarm duration.
Further, preset security prompting duration in gas alarm device, when gas alarm device is in danger warning state, detect that gas concentration continues duration when being greater than safety instruction duration in lasting reduction, gas alarm device send safety instruction until gas concentration no longer continue reduce or until normal condition, when detecting that gas concentration is reduced to normal condition, gas alarm device is cleared and is reported to the police and safety instruction.
Further, described pre-alarm can be suspended by selection, also can be continued to perform by selection, suspends and the mode that continues is: user to suspend gas alarm device input at local or local terminal or remote terminal or continues instruction.
The present invention's beneficial effect is compared with prior art: when gas concentration rate of change is higher than safe concentration rate of change and this state continues duration is greater than early warning duration, but gas concentration is lower than the first secure threshold, gas alarm device enters pre-alarm state, send pre-alarm, send the pre-alarm gentleer than danger warning, to point out user's gas concentration to increase, need carefully to take precautions against.The benefit of such process has two: one, and user can not be absorbed in a hurry because of the danger warning sound hearing suddenly high-decibel, and decreasing user gets a fright, and decreases conventional gas alarm creating disturbances to user; Its two just point out user's gas concentration to rise because arrive before alarm threshold value in combustion gas, user just has an opportunity immediately to find root, takes precautions against in possible trouble, improves security.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is a kind of warning sequential chart of conventional gas alarm;
Fig. 2 is the warning sequential chart of first embodiment of the invention;
Fig. 3 is the warning sequential chart of second embodiment of the invention;
Fig. 4 is the warning sequential chart of third embodiment of the invention;
Fig. 5 is the warning sequential chart of four embodiment of the invention;
Fig. 6 is the warning sequential chart of fifth embodiment of the invention;
Fig. 7 is the module map of the gas alarm device realizing the inventive method.
Embodiment
In order to more fully understand technology contents of the present invention, below in conjunction with specific embodiment technical scheme of the present invention being introduced further and illustrating.
As shown in Figure 1, for a kind of warning sequential chart of conventional gas alarm, presetting a threshold value more much lower than dangerous concentrations (is generally 25%LEL, namely explosion ratio lower limit 25%), namely sound and light alarm signal is sent higher than this threshold value when monitoring gas concentration in environment, user manually can cancel sound and light alarm signal or after removing dangerous matter sources, sound and light alarm signal is cancelled automatically, the shortcoming of this method is: because alarm threshold value step-up error is large, can create disturbances to user's generation because of false alarm, also need user to make a desperate move and close warning.Therefore need a kind of fuel gas alarm, while adopting new alarm method can ensure to provide enough warnings accurately and timely, user is not caused and create disturbances to.
As shown in Figure 2, be the warning sequential chart of first embodiment of the invention, a kind of alarm method of gas alarm device, preset first threshold value, safe concentration rate of change and early warning duration T1 in gas alarm device; 1. gas concentration rate of change is being located higher than safe concentration rate of change, but gas concentration is lower than first threshold, be greater than after 2. early warning duration T1 arrive when gas concentration rate of change to continue duration higher than safe concentration rate of change, but gas concentration is lower than first threshold, gas alarm device enters pre-alarm state, sends pre-alarm; When gas concentration rises to higher than first threshold, gas alarm device enters danger warning state, sends danger warning.
Further, described danger warning state manually cannot be cancelled by user, automatically can only cancel at the gas concentration detected lower than first threshold.This method adopts first threshold, safe concentration rate of change and early warning duration T1 tri-parameters to monitor gas leakage situation, and adds pre-alarm step, more accurate to alert condition prognosis, alarm method hommization more, rationalization.
As shown in Figure 3, be the warning sequential chart of second embodiment of the invention, a kind of alarm method of gas alarm device, is also provided with the Second Threshold lower than first threshold in gas alarm device; 1. locating gas concentration rate of change higher than safe concentration rate of change, but gas concentration is lower than first threshold, is greater than after 2. early warning duration T1 arrive when gas concentration rate of change to continue duration higher than safe concentration rate of change, enters pre-alarm state, send pre-alarm; 3. locating, gas concentration rise to higher than Second Threshold but lower than first threshold time, gas alarm device enters abnormal alarm state, sends abnormal alarm; 4. locating, gas concentration rises to higher than first threshold, and gas alarm device enters danger warning state, sends danger warning.Second Threshold is set, and abnormality alarm state is set between alert status and danger warning state, more can react alert situation accurately.
Further, as shown in Figure 4, be the warning sequential chart of third embodiment of the invention, in gas alarm device, be also provided with the 3rd threshold value lower than Second Threshold; Danger warning state manually cannot be cancelled by user, only has when gas concentration being detected lower than the 3rd threshold value, and gas alarm device is cleared alarm condition, enters normal condition.This kind of method can prevent combustion gas user from could not pay attention to alert situation, and agitation is in the signal of hydropac, and when alert is not removed, the clear-cut signal manually cancelling hydropac, finally may lead to a disaster.
As shown in Figure 5, it is the warning sequential chart of four embodiment of the invention, an alarm method for gas alarm device, presets first abnormality alarm duration T2, the second abnormality alarm duration T3 of gas concentration rate of change higher than safe concentration rate of change in gas alarm device; When gas concentration rate of change higher than safe concentration rate of change continue duration be greater than the first abnormality alarm duration T2 time, namely reach 4. through the running hours being greater than the first abnormality alarm duration T2 from 1. place, and detect that gas concentration rises to higher than the second secure threshold, enter abnormal alarm state by precaution alarm state;
Abnormal alarm state is cancelled lower than Second Threshold or the 3rd threshold value automatically at the gas concentration detected, also can 5. located manual cancellation by user;
In the present embodiment, user manually cancels abnormal alarm state, after the continuous working duration being less than the second abnormality alarm duration T3,6. locating again because detecting that gas concentration enters abnormal alarm state again higher than Second Threshold, this again abnormal alarm state manually cannot be cancelled by user, only automatically cancel lower than Second Threshold or the 3rd threshold value at the gas concentration detected.This kind of mode is to remind user to pay attention to alert situation, and alert of making a thorough investigation is originated, and avoids major accident to occur.
First abnormality alarm duration T2 is greater than early warning duration T1, and the first abnormality alarm duration T2 is greater than the second abnormality alarm duration T3.
As shown in Figure 6, it is the warning sequential chart of fifth embodiment of the invention, the alarm method of gas alarm device described in, preset security prompting duration T4 in gas alarm device, when gas alarm device is in danger warning state, detect that gas concentration continues duration when being greater than safety instruction duration T4 in lasting reduction, gas alarm device send safety instruction until gas concentration no longer continue reduce or until normal condition, when detecting that gas concentration is reduced to normal condition, gas alarm device is cleared warning, gets back to normal condition.This kind of method makes user have gas leakage situation, recovery situation to control more accurately, understands.
Further, for convenience of user, pre-alarm can be suspended by selection, also can be continued to perform by selection, suspends and the mode that continues is: user to suspend gas alarm device input at local or local terminal or remote terminal or continues instruction.
As shown in Figure 7, be the module map of the gas alarm device realizing the inventive method, a kind of gas alarm device comprises microprocessor or has the integration module 110 of microprocessor function; Storer 120, preserves threshold data, long data etc. when arranging; Message output module 130, comprises the LCD display 131 for exhibiting device current state information and loudspeaker 132; MIM message input module 140, comprises machinery input 141 and photoelectricity input 142; Wireless communication module 150, comprises and the long-range communications module 151 of remote facility radio communication and the short-range communication module 152 with local device radio communication; Gas security 160.
The warning message of gas alarm device can show user locally through message output module 130, also can be sent in the terminal of long-range or local user by wireless communication module 150, the computing machine of the client of coupling, panel computer, mobile phone etc. are such as housed.
In the present invention, term " first ", " second " are only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity or order that indicate indicated technical characteristic.
Although the alarm method herein for gas alarm device gives specific embodiment, but also go for other security alarm scenes, include but not limited to supervision on hazardous substances warning in water, electromagnetic radiation intensity monitoring, alarming, monitoring poisonous gas are reported to the police, Smoke Detection is reported to the police.
The above only further illustrates technology contents of the present invention with embodiment, so that reader is easier to understand, but does not represent embodiments of the present invention and is only limitted to this, and any technology done according to the present invention extends or recreation, all by protection of the present invention.
Claims (7)
1. an alarm method for gas alarm device, is characterized in that, comprises the steps:
Preset first threshold value, safe concentration rate of change and early warning duration in gas alarm device;
When gas concentration rate of change is higher than safe concentration rate of change and this state continues duration is greater than early warning duration, but gas concentration is lower than the first secure threshold, and gas alarm device enters pre-alarm state, sends pre-alarm signal;
When gas concentration is higher than first threshold, gas alarm device enters danger warning state, sends danger alarm signal.
2. the alarm method of gas alarm device as claimed in claim 1, it is characterized in that, described danger warning state manually cannot be cancelled by user, automatically can only cancel at the gas concentration detected lower than first threshold.
3. the alarm method of gas alarm device as claimed in claim 1, is characterized in that, be also provided with the Second Threshold lower than first threshold in gas alarm device;
When gas concentration rate of change is higher than safe concentration rate of change and this state continues duration is greater than early warning duration, when gas concentration is higher than Second Threshold but lower than first threshold, gas alarm device enters abnormal alarm state, sends abnormal alarm.
4. the alarm method of gas alarm device as claimed in claim 3, is characterized in that, be also provided with the 3rd threshold value lower than Second Threshold in gas alarm device;
Danger warning state manually cannot be cancelled by user, only has when gas concentration being detected lower than the 3rd threshold value, and gas alarm device is cleared alarm condition, enters normal condition.
5. the alarm method of gas alarm device as claimed in claim 4, it is characterized in that, the first abnormality alarm duration, the second abnormality alarm duration is preset in gas alarm device, when gas alarm device is greater than the first abnormality alarm duration at the duration of normal condition and pre-alarm state work, and detect that gas concentration is higher than Second Threshold, gas alarm device enters abnormal alarm state by precaution alarm state;
Described abnormal alarm state is cancelled lower than Second Threshold or the 3rd threshold value automatically at the gas concentration detected, also manually can be cancelled by user;
If manually cancel abnormal alarm state, after the continuous working duration being less than the second abnormality alarm duration, gas alarm device is because detecting that gas concentration enters abnormal alarm state again higher than Second Threshold, this abnormal alarm state manually cannot be cancelled by user, only automatically cancels lower than Second Threshold or the 3rd threshold value at the gas concentration detected.
Described first abnormality alarm duration is greater than early warning duration, and the first abnormality alarm duration is greater than the second abnormality alarm duration.
6. the alarm method of gas alarm device as described in as arbitrary in claim 1 or 4, it is characterized in that, preset security prompting duration in gas alarm device, when gas alarm device is in danger warning state, detect that gas concentration continues duration when being greater than safety instruction duration in lasting reduction, gas alarm device send safety instruction until gas concentration no longer continue reduce or until normal condition, when detecting that gas concentration is reduced to normal condition, gas alarm device is cleared and is reported to the police and safety instruction.
7. the alarm method of gas alarm device as claimed in claim 1; it is characterized in that; described pre-alarm can be suspended by selection; also can be continued to perform by selection, to suspend and the mode that continues is: user to suspend gas alarm device input at local or local terminal or remote terminal or continues instruction.
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| CN201510018667.9A CN104574848B (en) | 2015-01-14 | 2015-01-14 | A kind of alarm method of gas alarm device |
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| CN201510018667.9A CN104574848B (en) | 2015-01-14 | 2015-01-14 | A kind of alarm method of gas alarm device |
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