CN100444208C - Alarm with data recording device for detecting combustible gas - Google Patents
Alarm with data recording device for detecting combustible gas Download PDFInfo
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- CN100444208C CN100444208C CNB2006100155760A CN200610015576A CN100444208C CN 100444208 C CN100444208 C CN 100444208C CN B2006100155760 A CNB2006100155760 A CN B2006100155760A CN 200610015576 A CN200610015576 A CN 200610015576A CN 100444208 C CN100444208 C CN 100444208C
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- 238000001514 detection method Methods 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 208000001408 Carbon monoxide poisoning Diseases 0.000 description 1
- 206010017740 Gas poisoning Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
An alarm being used to detect flammable gas and being set with data record unit consists of A/D converter, detection unit, alarm mechanism and power supply. It is featured as connecting monolithic computer to storage through data line enabling to write voltage data in storage on fixed time and clock line port, connecting monolithic computer to detection unit by data line and connecting one storage to monolithic computer to output alarm signal being consistency with alarming conditions to relay and buzzer as well as indication lamp, simultaneously storing position data of alarm data in storage.
Description
Technical Field
The invention relates to an electronic device for gas detection, in particular to a combustible gas detection alarm device with an electronic recording unit.
Background
In the prior art, for example, chinese patent 03270719.3 discloses a portable intelligent gas detector, which includes one or more gas detection sensors, an I/V conversion and amplification processing circuit connected to each gas detection sensor, a temperature sensor circuit, a microprocessor having multiple analog signal input terminals, an external program memory storing data of a standard curve table of zero point and temperature of the sensors, and a liquid crystal display circuit; the gas detection sensor is connected with a corresponding analog signal input end of the microprocessor through an I/V conversion amplification processing circuit, and the temperature sensor is connected with a corresponding analog signal input end of the microprocessor; the external program memory and the liquid crystal display circuit are both connected with the microprocessor, and the microprocessor finds out the corresponding correction value from the external program memory by using the acquired temperature value, and automatically records and stores the monitoring data of the set time period.
Also as disclosed in chinese patent application 01251431.4, the present invention provides a gas detector, which includes a sensor, an amplifying circuit, an a/D converting circuit, a single chip, a display circuit, a clock circuit, a memory, a communication circuit, an information button, an information collecting circuit, and a power circuit; the output of the sensor is connected with an amplifying circuit, the amplifying circuit is connected with an A/D conversion circuit, the A/D conversion circuit is connected with a single chip microcomputer, the single chip microcomputer is connected with a display circuit, meanwhile, the single chip microcomputer is also connected with a clock circuit, a memory and an information reading button circuit, and a power supply circuit is connected with all parts and supplies power to the whole circuit.
The conventional gas detecting device cannot record and store relevant parameters before and after an accident when a fire or explosion occurs. The industry hopes that the gas detection device can have the function of a black box, even if the recorded data in the detected house damage detection device can be well stored, analysis is provided, the same accident can be avoided in the future, and safety measures can be better taken.
In addition, most of the conventional technologies cannot record real-time operation data of the detector in a normal monitoring state and an alarm state, so that engineering problems existing in practical use, such as the fact that the sensor is aged and needs to be replaced, the quality of the sensor is poor, a combustible gas alarm system gives a false alarm or a false alarm fault, and the like, cannot be found, and accident analysis and responsibility judgment cannot be carried out after a gas leakage accident occurs.
Furthermore, the existing detectors capable of memorizing time data mostly use timing clock chips and use internal storage batteries to keep the continuous work of the clock chips when the products are powered off, so that the construction cost is high, the cost of the whole product of the household combustible gas detection alarm is high, and the industrial popularization is influenced.
Disclosure of Invention
The invention aims to solve the problem that the defects of the conventional technology are overcome, and the combustible gas detection alarm with the data recording device can still accurately measure time by eliminating a timing clock chip and an internal storage battery structure.
The invention solves the technical problem by adopting the following technical scheme that the combustible gas detection alarm with the data recording device comprises a singlechip with an analog-to-digital converter, a detection unit, an alarm mechanism and a power supply, wherein the detection unit, the alarm mechanism and the power supply are respectively connected with the singlechip,
the single chip microcomputer is connected with the memory through a data line and a clock line port, and the data line and the clock line port can write voltage data into the memory at fixed time in a preset minute or second time interval unit; the single chip microcomputer is provided with a preset alarm threshold value memory unit for providing data comparison processing, a normal state data value memory unit, an alarm threshold value memory unit for detecting short circuit and open circuit faults of the unit and a detection unit temperature compensation data table memory unit; the single chip microcomputer is connected with the detection unit through data lines respectively;
the port of a memory is respectively connected with a clock line and a data line of the singlechip and used for receiving and storing each group of data from the singlechip, and the memory is provided with storage units for respectively storing each group of data according to a preset address sequence; the memory is provided with a detection unit voltage memory unit, a data memory unit, a current data set address pointer memory unit and an alarm threshold memory unit, wherein the detection unit voltage memory unit is used for providing data comparison processing and detecting in real time by the detection unit, the current data set address pointer memory unit and the alarm threshold memory unit are used for outputting alarm signals meeting preset alarm conditions to a relay, a buzzer and a state indicator lamp and storing position data of alarm data into the memory.
The technical problem can be solved by adopting the following technical measures to further realize the following steps:
the combustible gas detection alarm with the data recording device is characterized in that the detection unit consists of a gas sensor, a carbon monoxide sensor and a temperature sensor, and the signal output ends of the gas sensor, the carbon monoxide sensor and the temperature sensor are respectively connected with the corresponding ports of the singlechip capable of performing analog-to-digital conversion.
In the combustible gas detection alarm with the data recording device, the output end of the power supply is respectively connected with the power input ends of the gas sensor and the carbon monoxide sensor after on-off control according to a preset working time sequence for the sensors through an I/O port of the single chip microcomputer; the output end of the power supply is connected with the power input end of the temperature sensor; and the output end of the power supply is also connected with the power ends of the singlechip and the memory respectively.
In the combustible gas detection alarm with the data recording device, the gas sensor and the carbon monoxide sensor are semiconductor sensors, and the temperature sensor is a thermistor.
In the combustible gas detection alarm with the data recording device, the single chip microcomputer is a PIC16F73 type single chip microcomputer, and the memory is a 24C16 type memory.
The alarm mechanism is composed of a relay, a buzzer and a status indicator lamp, the relay and the buzzer are respectively connected with an output port of the single chip microcomputer through an amplifier, and the output port of the single chip microcomputer is connected with a corresponding end of the status indicator lamp.
Compared with the prior art, the invention has obvious advantages and beneficial effects. According to the technical scheme, the invention has at least the following advantages under excellent structure configuration:
the invention is provided with the gas sensor, the carbon monoxide sensor and the temperature sensor, thereby integrating gas leakage detection alarm, carbon monoxide safety detection alarm and fire constant temperature alarm, and cutting off the gas source while alarming, so as to effectively guarantee the personal safety of users.
The invention relates to a single chip microcomputer and a memory which are configured in a more reasonable mode, when engineering problems occur or engineering problem analysis or accident analysis and responsibility judgment are needed after an accident occurs, data in the memory can be read out through software interface operation of a special computer connected with the single chip microcomputer, corresponding four operation data curves are formed, and after comprehensive analysis is carried out according to the data curves, whether gas leakage occurs in an accident site, what alarm occurs when the gas leakage occurs, whether the accident is gas poisoning or carbon monoxide poisoning caused by forgetting to shut off fire by a user or whether the accident is caused by pipeline gas leakage and the like can be judged very easily. Therefore, reliable and effective data basis can be provided for gas leakage detection judgment, related accident analysis, responsibility analysis, engineering problem judgment, determination of wounded rescue schemes and the like in engineering practical application.
The reasonable configuration of the singlechip and the memory can remove a clock circuit or a clock chip which can not be reduced by the prior art, abandons the concept of absolute time, and adopts the concept of relative time to set a data storage unit, so that the requirement of the alarm can be met only by needing a data storage space of a few K bytes, the product cost can be effectively reduced, the alarm is compatible with audiences, and the wide industrial popularization is realized. Compared with the prior art, the invention has obvious contribution and progress, completely realizes the technical purpose, and is really a good technology with novelty, creativity and practicability.
The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a schematic diagram of the circuit of the present invention.
Detailed Description
The details of the embodiments, structures, features and functions provided by the present invention are described in the following detailed description and the best mode for carrying out the invention.
As shown in fig. 1-2, a combustible gas detection alarm with a data recording device comprises a single chip microcomputer U1 with an analog-to-digital converter and a detection unit J connected with the single chip microcomputer, wherein,
the power supply B is formed by connecting the input end of a direct current power supply B2 and the output end of a rectifying circuit B1; the power supply is rectified by a rectifying circuit B1 and stabilized by a DC/DC direct current power supply B2 to form stable VCC voltage for supplying power to the whole alarm; the DC/DC direct-current power supply B2 can be composed of a commercially available model MC34063 and related peripheral circuits, and the rectifying circuit B1 can be a commercially available model MB 6S;
one output end of the power supply is respectively connected with the power input ends of the gas sensor S1 and the carbon monoxide sensor S2 after on-off control of two I/O ports of BH and HEAT of a singlechip U1;
the other output end of the power supply is connected with the power supply input end of the temperature sensor Rt 1;
the output end of the power supply is connected with the power supply ends of the singlechip U1 and the memory U2 respectively; the BH and HEAT I/O ports of the single chip microcomputer respectively control the working power supplies of the sensors S1 and S2 by controlling the connection and disconnection of the triodes V1 and V2 according to the working time sequence preset for each sensor;
the detection unit J consists of a gas sensor S1, a carbon monoxide sensor S2 and a temperature sensor Rt1, and signal output ends AD0, AD1 and AD3 of the gas sensor S1, the carbon monoxide sensor S2 and the temperature sensor Rt1 are respectively connected with corresponding ports of the single chip microcomputer so that analog voltage signals of the sensors, which are acquired by the single chip microcomputer through AD0, AD1 and AD3 ports in real time, are converted into digital signals through analog-to-digital conversion of an internal analog-to-digital converter of the single chip microcomputer; the gas sensor and the carbon monoxide sensor can be semiconductor sensors, and the temperature sensor can be a thermistor;
the single chip microcomputer U1 can be a PIC16F73 single chip microcomputer, and is connected with a serial data port U11 of external data equipment (such as a computer) through serial data terminals TXD and RXD of the single chip microcomputer so as to call out detection data stored in the alarm for analysis; when a communication instruction of external data equipment is received, the single chip microcomputer U1 interrupts the current work, sequentially reads data in the memory U2 through an SCL clock line and an SDA data line, and sequentially sends the data to the external data equipment according to an appointed baud rate;
the alarm mechanism is composed of a relay J1, a buzzer B3 and a status indicator lamp HL1, the relay J1 and the buzzer B3 are respectively connected with the DCF and BUZ output ports of the single chip microcomputer through amplifiers, and the L-GRN and L-RED output ports of the single chip microcomputer are connected with the corresponding ends of the status indicator lamp HL 1;
when gas alarm or temperature alarm occurs, the single chip microcomputer U1 amplifies through a DCF output port and a triode V4 to drive a relay J1 to act and transmit alarm signals to the outside, and simultaneously amplifies through a BUZ output port and a triode V3 to drive a buzzer B3 to emit alarm sound and drives a state indicator lamp HL1 to emit alarm light signals through L-GRN and L-RED output ports;
when a sensor short circuit and open circuit fault occurs, the singlechip U1 amplifies and drives the buzzer B3 to send out a fault alarm sound through the BUZ output port through the triode V3 and drives the state indicator lamp HL1 to send out a fault alarm light signal through the L-GRN and L-RED output ports;
the single chip microcomputer is connected with the memory U2 through data line ports SCL and SDA; the single chip microcomputer is provided with a preset alarm threshold value memory, a normal state data value memory, a sensor short circuit and open circuit fault alarm threshold value memory and a sensor temperature compensation data table memory; the signals of each sensor which are acquired by the single chip microcomputer and are subjected to digital filtering processing are respectively compared with data such as a preset alarm set value and a high-low fault alarm threshold in the single chip microcomputer after being subjected to temperature compensation operation with a preset temperature compensation table in the single chip microcomputer; writing voltage data into the memory U2 at regular time by taking preset minutes or seconds as a time interval unit;
data line ports SCL and SDA of a memory U2 are respectively connected with a clock line and a data line of the single chip microcomputer, the memory receives and stores each group of data from the single chip microcomputer, each group of data occupies a respective independent storage space in the memory, each group of data in the memory is stored according to an address sequence and is updated circularly, an alarm signal meeting a preset alarm condition is output to a relay J1, a buzzer B3 and a state indicator HL1, and meanwhile position data of the alarm data are stored in the memory U2; the voltage value and the alarm threshold value of the sensor under clean air are prestored in the memory; the memory receives and stores the sensor operation data value and the current data set address pointer in real time; the memory may be a commercially available memory model number 24C16,
under the normal operation state, the single chip microcomputer collects voltage data of the gas sensor, the carbon monoxide sensor and the temperature sensor in real time through the internal analog-to-digital converter, after data processing and temperature compensation operation is carried out through a temperature compensation table preset in the single chip microcomputer, the data are stored in the memory at a certain time interval according to the address sequence, an address pointer of the current data storage operation is stored in the memory, each group of data occupies a storage space with more than or equal to 4 data bytes, and the time interval is set to be minutes or seconds according to actual requirements. Each group of data occupies independent storage space in the memory, each group of data in the memory is stored according to the address sequence and is circularly updated, and the group of data less than or equal to 400 can be stored in the storage space of 2 Kbytes. When data analysis is needed, the change conditions of the gas concentration and the environmental temperature in a limited time period can be known only by reading out the data recorded in the memory, and the results of accident analysis and responsibility judgment can be obtained by comprehensively analyzing all data groups, so that the purpose of analyzing the information in relative time without a clock circuit or a clock chip is achieved.
The set time interval is assumed to be 4 minutes, 400 groups of data can be stored in the memory, the position of the last group of data before the alarm is powered off can be known by inquiring an address pointer, the time can be easily reversed by using external data equipment such as a computer according to the specific time value of the power-off moment of the alarm, a certain group of data or the specific time value of basically accurate alarm moment can be obtained, the maximum value of the time error is the preset time interval (such as 4 minutes), the conventional memory capable of storing 400 groups of data is low in market price and can meet the household requirement of the alarm, the alarm can store the data of the gas concentration and the environmental temperature change within 26 hours before the power-off moment, the requirement for describing the processes before and after the occurrence of an accident can be completely met, and the product cost can be effectively reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. A combustible gas detection alarm with a data recording device comprises a singlechip with an analog-to-digital converter, a detection unit, an alarm mechanism and a power supply which are respectively connected with the singlechip, and is characterized by also comprising a computer connected with the singlechip; wherein,
the computer is used for sending a communication instruction to the single chip microcomputer and receiving data sent by the single chip microcomputer;
the single chip microcomputer is provided with a preset alarm threshold value memory unit for providing data comparison processing, a normal state data value memory unit, an alarm threshold value memory unit for detecting short circuit and open circuit faults of the unit and a detection unit temperature compensation data table memory unit; the single chip microcomputer is connected with the detection unit through data lines respectively; the port connection of a data line and a clock line which are used for writing voltage data into the memory at fixed time by taking preset minutes or seconds as a time interval unit is connected with the memory; the single chip microcomputer acquires voltage data of the detection unit in real time through the analog-to-digital converter, stores the data into the memory at certain time intervals according to an address sequence after the data processing and the temperature compensation operation through a temperature compensation data table preset in the single chip microcomputer, and stores an address pointer of the current data storage operation into the memory;
the port of the memory is respectively connected with a clock line and a data line of the singlechip and used for receiving and storing each group of data from the singlechip, the memory is provided with a storage unit for respectively storing each group of data according to a preset address sequence, each group of data occupies independent storage space in the memory, and each group of data in the memory is stored according to the address sequence and is circularly updated; the memory is provided with a detection unit voltage memory unit, a data memory unit, a current data set address pointer memory unit and an alarm threshold memory unit, wherein the detection unit voltage memory unit is used for providing data comparison processing and detecting in real time by the detection unit, the current data set address pointer memory unit and the alarm threshold memory unit, so that an alarm signal meeting a preset alarm condition is output to a relay, a buzzer and a state indicator lamp, and meanwhile, position data of alarm data are stored in the memory;
when the single chip microcomputer receives a communication instruction of the computer, the single chip microcomputer interrupts the current work, sequentially reads the data stored in the memory through the clock line and the data line, and sequentially sends the data to the computer according to the appointed baud rate, and the computer reversely deduces the time according to the specific time value of the power-off time of the alarm to obtain the data in a relative time period before the power-off time or the specific time value with accurate alarm time; the maximum value of the time error is a preset time interval, and data information with accurate specific time values in the relative time period is analyzed to obtain accident cause analysis and responsibility judgment results.
2. The flammable gas detection alarm with data logging device of claim 1, wherein each set of data occupies a storage space of 4 bytes or more.
3. The flammable gas detection alarm with data logging device of claim 2, wherein when the time interval is set to 4 minutes and 400 sets of data are stored in the memory, the alarm can store data within 26 hours before the power-off time.
4. The combustible gas detection alarm with the data recording device as claimed in claim 1, wherein the detection unit is composed of a gas sensor, a carbon monoxide sensor and a temperature sensor, and the signal output ends of the gas sensor, the carbon monoxide sensor and the temperature sensor are respectively connected with the corresponding ports of the singlechip capable of analog-to-digital conversion.
5. The combustible gas detection alarm with the data recording device according to claim 4, wherein the output end of the power supply is respectively connected with the power input ends of the gas sensor and the carbon monoxide sensor after on-off control according to a preset working time sequence for the sensors through an I/O port of a single chip microcomputer; the output end of the power supply is connected with the power input end of the temperature sensor; and the output end of the power supply is also connected with the power ends of the singlechip and the memory respectively.
6. A combustible gas detection alarm with a data logging device according to claim 5 wherein the gas sensor and the carbon monoxide sensor are semiconductor sensors and the temperature sensor is a thermistor.
7. The flammable gas detecting and alarming device with the data recording device as claimed in claim 6, wherein the single chip microcomputer is a PIC16F73 type single chip microcomputer, and the memory is a 24C16 type memory.
8. A flammable gas detecting alarm with a data logging device as claimed in any one of claims 1 to 7 wherein the alarm mechanism is comprised of a relay, a buzzer and a status indicator light, the relay and the buzzer are connected to the output port of the single chip microcomputer through an amplifier, and the output port of the single chip microcomputer is connected to the corresponding end of the status indicator light.
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| CNB2006100155760A CN100444208C (en) | 2006-09-04 | 2006-09-04 | Alarm with data recording device for detecting combustible gas |
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| CN2008101804118A Division CN101425216B (en) | 2006-09-04 | 2006-09-04 | Method for collocating combustible gas detecting alarm with data recording function |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103388747B (en) * | 2012-05-08 | 2016-02-03 | 上海化学工业区公共管廊有限公司 | Gas transmission pipeline monitoring system |
| CN103776956A (en) * | 2012-10-18 | 2014-05-07 | 河南宏天实业有限公司 | Gas detection digital bridge and intelligent processing technology |
| CN103742793B (en) * | 2014-01-02 | 2017-01-18 | 浙江海洋学院 | crude oil pipeline leakage alarm device |
| CN110718049A (en) * | 2019-10-15 | 2020-01-21 | 福州市协成智慧科技有限公司 | Household gas leakage alarm system |
| CN114283552B (en) * | 2021-12-27 | 2022-11-15 | 河南驰诚电气股份有限公司 | Combustible gas alarm system and method for driving wireless electromagnetic valve |
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Denomination of invention: Alarm with data recording device for detecting combustible gas Effective date of registration: 20110302 Granted publication date: 20081217 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Puhai New Tech Co., Ltd., Tianjin City Registration number: 2011990000060 |
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Date of cancellation: 20120515 Granted publication date: 20081217 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Puhai New Tech Co., Ltd., Tianjin City Registration number: 2011990000060 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Alarm with data recording device for detecting combustible gas Effective date of registration: 20120515 Granted publication date: 20081217 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Puhai New Tech Co., Ltd., Tianjin City Registration number: 2012990000207 |
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Date of cancellation: 20131101 Granted publication date: 20081217 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Puhai New Tech Co., Ltd., Tianjin City Registration number: 2012990000207 |
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Denomination of invention: Alarm with data recording device for detecting combustible gas Effective date of registration: 20131101 Granted publication date: 20081217 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Puhai New Tech Co., Ltd., Tianjin City Registration number: 2013990000813 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20120515 Granted publication date: 20081217 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Puhai New Tech Co., Ltd., Tianjin City Registration number: 2011990000060 |
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