CN103185775A - Combustible gas detection alarm device - Google Patents
Combustible gas detection alarm device Download PDFInfo
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- CN103185775A CN103185775A CN 201110446653 CN201110446653A CN103185775A CN 103185775 A CN103185775 A CN 103185775A CN 201110446653 CN201110446653 CN 201110446653 CN 201110446653 A CN201110446653 A CN 201110446653A CN 103185775 A CN103185775 A CN 103185775A
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Abstract
The invention discloses a flammable gas detection alarm device, which comprises a hardware part and a software part, wherein the hardware circuit is mainly composed of a singlechip circuit, a data acquisition circuit, a temperature compensation circuit, an LED display circuit and a data transmission group; and the software mainly includes an acquisition module program, a temperature measurement program, a display program, and a wireless transmission program. The hardware part also takes hardware anti-jamming measures, including a power anti-jamming measure, a channel transmission anti-jamming measure and a printed circuit board anti-jamming measure. The flammable gas detection alarm device of the present invention helps to improve the measurement accuracy and controls the communication module to realize wireless data transmission, can meet the accuracy requirements of most industrial production occasions, is easy to operate, inexpensive, and suitable for occasions of complex installation conditions.
Description
Technical field
The present invention relates to instrument and meter, be specifically related to a kind of inflammable gas detection alarm device.
Background technology
Methane, carbon monoxide, sulfuretted hydrogen etc. are flammable, explosion hazard gases is one of reason that causes serious accident in the production fields such as the exploration exploitation of coal, petroleum gas and chemical industry.Therefore, detection inflammable to this type of in these environment, explosion hazard gases is an important link that realizes safety in production.
The product specification of gas detecting instrument has 300 to 400 kinds in the world at present.That gas concentration detector can be divided on apparatus structure and the detection method is portable, pocket and fixed 3 classes.Portable instrumentation is mainly pump suction type.The pump suction type instrument generally has long stopple coupon, can be used for dangerous operation place (as: pipeline, sewer, cabin, gas tank etc.) harmful flammable explosive gas of unknown concentration is detected; Be suitable for the testing staff and regularly carry out safety detection and mouthful normal the detection; The detection method of pocket instrument is mainly based on diffusion method, is suitable for that the Security Officer carries use in the dangerous operation environment, and single type and compound 2 kinds are arranged; Fixed detecting instrument is used for real-time online and detects, and is installed on the scene that may produce peril, realizes real-time detection alarm, and its detection method is usually based on diffusion method.
Along with the fast development of gas detecting instrument technology, the safety in production of industry and the protection of environment are played an important role.Especially in prevention and production fields such as the exploration exploitation that reduces coal, petroleum gas and chemical industry serious accident played vital, irreplaceable effect.Great industrial scenes such as exploration exploitation at coal, petroleum gas all exist flammable, poisonous gas in a large number inevitably, when inflammable gas accumulates in together, will be easy to when concentration has surpassed explosion limits concentration blast, people's safety of life and property has been brought great destruction; When poisonous gas accumulates to certain concentration, the people is poisoned, therefore can not keep the safety in production, serious meeting jeopardizes people's life.Therefore the detection to the various harmful gases of these occasions just becomes indispensable link in the industrial safety production.
Though the present both at home and abroad investigative technique of flammable and toxic gas pick-up unit comparative maturity, yet many like products exist function singleness, sensitive or operate shortcomings such as loaded down with trivial details, that price is high inadequately on the market.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of inflammable gas detection alarm device is provided, can satisfies the accuracy requirement of most commercial production occasions, and easy to operate, cheap, also designed wireless data transceiver module simultaneously, the occasion that is fit to the mounting condition complexity is used.
Technical scheme of the present invention is: a kind of inflammable gas detection alarm device, and it comprises hardware components and software section; Hardware circuit mainly is made up of single chip circuit, data acquisition circuit, temperature-compensation circuit, LED display circuit and data transmission; Software mainly comprises acquisition module program, temperature survey program, display routine, wireless receiving and dispatching program;
Wherein, MSP 430 single-chip microcomputers that single chip circuit uses, the analog to digital converter that has 12 bit resolutions is realized analog acquisition by the A/D passage in the sheet, and single-chip microcomputer adopts the interface of the existing digital data acquisition circuit of general I/O cause for gossip, and comes the collection of control figure amount by a general I/O mouth; Utilize the UART in the single-chip microcomputer sheet to realize serial communication; Single-chip microcomputer adopts the clock signal of a 32kHZ, adopts the clock signal of a 8MHZ; The clock part all adopts crystal oscillator to realize; The electric capacity that increases by 0.1 a μ F at the pin of power supply is realized filtering, to reduce the interference that input end is subjected to; Single-chip microcomputer also has the analog power input end in addition, and the analog power input end increases a filter capacitor to reduce interference;
Data acquisition circuit adopts the RS of R0, R9, R10 and TGS813 to constitute an electric bridge, realizes resistance-voltage transitions; An operational amplifier A among the LM324 being connected into voltage follower and resistance R 7, stabilivolt D1 form mu balanced circuit, is the electric bridge power supply; The input end that the voltage of electric bridge conversion is added to another one operational amplifier B among the LM324 amplifies, and adjustable resistance R11 is used for regulating the enlargement factor of amplifying circuit, so that export suitable voltage for the AD conversion of back;
Temperature-compensation circuit has adopted " one-wire bus " digital temperature sensor DS18B20 to carry out temperature survey; Measuring temperature range is-55 ℃
-+ 125 ℃, at-10 ℃
-In+85 ℃ of scopes, precision is no more than ± and 0.5 ℃, ultimate resolution can reach 0.0625 ℃; This sensor contains parasite power, but both unibus power supplies, also available external power source, and have good negative pressure characteristic; Simultaneously, DS18B20 supports 3V
-The voltage range of 5V;
What the LED display circuit adopted is the simple LED display mode, and this display circuit directly is connected P1.0 with the I/O mouth of single-chip microcomputer
-P1.7 is used for showing data, P2.0
-P2.3 is used for controlling the strobe state of charactron;
The data transmission of wireless transmission circuit is selected the NRF905 chip of NORDIC company for use, and this chip is made up of the receiver of a fully-integrated frequency modulator, a band detuner, a power amplifier, a crystal oscillator and a regulator; Frequency of operation can dispose by software, is arranged on the open ISM band of 433/868/915MHZ, and this device is operated in the 433MHZ frequency range; Maximum data rate 100kb/s, efficient GPSK modulation, 125 channel selections; The error detection of built in hardware CRC check and the control of point-to-multipoint delivery address; 1.9V
-3.6V low-power consumption work, quiescent current only is 2.5 μ A under the standby mode; Transceiver mode is short switching time, less than 650 μ s; Chip can arrange the address by software, can be connected use by direct and various single-chip microcomputers; The power supply of nRF905 separates by electric capacity; In PCB, beat some through holes as much as possible, the ground of top layer and bottom can fully be contacted;
Acquisition module is mainly concerned with the operation of A/D conversion and timer A; Be the acquisition tasks of changing to finish data by the A/D in the MSP430F149 sheet, the analog reference voltage of collection adopts the reference voltage in the sheet; Finish by timer A the interval time of data acquisition, when each timer A interrupts arriving, read A/D exactly and transform the data that collect, before read data, stop the A/D conversion earlier, start the A/D conversion reading the data back that finishes, if the data of obtaining, a zone bit notice master routine then is set, tells master routine to obtain new data; Whole module adopts is that the structure of interrupt service routine is finished;
The temperature probe of temperature compensation module program has adopted the temperature sensor DS18B20 of U.S. DALLAS semiconductor company as detecting element; This sensor temperature-measuring range is-55 ℃
-+ 125 ℃, the resolution maximum can reach 0.0625 ℃; In addition, this sensor can directly be read the dut temperature value, and it only is connected with three lines when single-chip microcomputer links to each other; After DS18B20 receives the temperature transition order, the conversion of beginning start-up temperature; Temperature value after converting just is stored in the 1st, 2 bytes of its inner high speed temporary storage with the two's complement situation of 16 bit strip sign extended; Single-chip microcomputer can be read this data by one-wire interface, reads the status during read data earlier, after read a high position, data are represented with 0.0625 ℃/LSB form;
The display circuit of display routine directly is connected with the data I/O mouth of single-chip microcomputer; P1.0
-P1.7 is used for showing data, P2.0
-P2.3 is used for controlling the strobe state of charactron, such as showing at DS1, only need provide the high-level strobe charactron at the P2.3 pin and just can show; Display module just simply is presented at data on the charactron, and this module comprises that mainly port initialization and data show two parts; The port initialization part: this part is finished P1.0
-P1.7 port, P2.0
-The initial work of P2.3 port is arranged to corresponding input and output direction;
The wireless receiving and dispatching program has adopted the nRF905 radio receiving transmitting module that data are carried out long-distance transmissions; The realization of nRF905 module radio transmission-receiving function mainly is by single-chip microcomputer its pin to be controlled to realize;
Power unit adopts the TPS76033 chip of TI company to realize, this chip can finely satisfy this requirements for hardware, and this chip has very little encapsulation in addition, therefore can effectively save the area of pcb board.
Reset circuit can adopt the R-C reset circuit, the reset circuit that also can adopt chip to realize, and preferred plan is the reset circuit that adopts the chip that resets to realize, this system adopts the MAX809 chip.
The system hardware interference protection measure has power supply interference protection measure, channel transmission interference protection measure and printed circuit board (PCB) interference protection measure;
Wherein, the power supply interference protection measure is to add a decoupling capacitor between the power supply of each integrated circuit and ground; In addition, per about 10 integrated circuit adds a slice charge and discharge capacitance (be called and hold the discharge appearance), and the optional 10pF high frequency performance of electric capacity is potsherd electric capacity or multi-layer ceramic capacitance preferably;
Channel transmission interference protection measure is to add wave filter in input channel;
The printed circuit board (PCB) interference protection measure is that power lead has been carried out suitable widening, and power lead and ground wire are being walked upwards and the data line basically identical; Clock circuit is arranged in pcb board near center or the position that ground connection is good, makes clock as far as possible near microprocessor, and keep lead-in wire short as far as possible, simultaneously with the quartz oscillator earthing of casing; Artificial circuit part and digital circuit are partly separated, high speed circuit and low-speed circuits are separated, high-power circuit and small signal circuit are separated, noise element and non-noise element are separated, shorten the lead-in wire between the element simultaneously as far as possible, make the interference and coupling of asking mutually reach minimum.
Advantage of the present invention is: improved measuring accuracy, and the control communication module realizes the wireless data transmission; Can satisfy the accuracy requirement of most commercial production occasions, and easy to operate, cheap, and the occasion that is fit to the mounting condition complexity is used.
Description of drawings
Fig. 1 is hardware circuit diagram of the present invention.
Fig. 2 is the interface circuit synoptic diagram of single-chip microcomputer of the present invention.
Fig. 3 is data acquisition circuit figure of the present invention.
Fig. 4 is display circuit figure of the present invention.
Fig. 5 is acquisition module program flow diagram of the present invention.
Embodiment
Embodiment:
A kind of inflammable gas detection alarm device, it comprises hardware components and software section; Hardware circuit mainly is made up of single chip circuit, data acquisition circuit, temperature-compensation circuit, LED display circuit and data transmission; Software mainly comprises acquisition module program, temperature survey program, display routine, wireless receiving and dispatching program;
Wherein, 1. MSP 430 single-chip microcomputers that use of single chip circuit, the analog to digital converter that has 12 bit resolutions is realized analog acquisition by the A/D passage in the sheet, and single-chip microcomputer adopts the interface of the existing digital data acquisition circuit of general I/O cause for gossip, and comes the collection of control figure amount by a general I/O mouth; Utilize the UART in the single-chip microcomputer sheet to realize serial communication; Single-chip microcomputer adopts the clock signal of a 32kHZ, adopts the clock signal of a 8MHZ; The clock part all adopts crystal oscillator to realize; The electric capacity that increases by 0.1 a μ F at the pin of power supply is realized filtering, to reduce the interference that input end is subjected to; Single-chip microcomputer also has the analog power input end in addition, and the analog power input end increases a filter capacitor to reduce interference.
2. data acquisition circuit adopts the RS of R0, R9, R10 and TGS813 to constitute an electric bridge, realizes resistance-voltage transitions; An operational amplifier A among the LM324 being connected into voltage follower and resistance R 7, stabilivolt D1 form mu balanced circuit, is the electric bridge power supply; The input end that the voltage of electric bridge conversion is added to another one operational amplifier B among the LM324 amplifies, and adjustable resistance R11 is used for regulating the enlargement factor of amplifying circuit, so that export suitable voltage for the AD conversion of back.
3. temperature-compensation circuit has adopted " one-wire bus " digital temperature sensor DS18B20 to carry out temperature survey; Measuring temperature range is-55 ℃
-+ 125, at-10 ℃
-In+85 ℃ of scopes, precision is no more than ± and 0.5 ℃, ultimate resolution can reach 0.0625 ℃; This sensor contains parasite power, but both unibus power supplies, also available external power source, and have good negative pressure characteristic; Simultaneously, DS18B20 supports 3V
-The voltage range of 5V.
What 4. the LED display circuit adopted is the simple LED display mode, and this display circuit directly is connected P1.0 with the I/O mouth of single-chip microcomputer
-P1.7 is used for showing data, P2.0
-P2.3 is used for controlling the strobe state of charactron.
5. the data transmission of wireless transmission circuit is selected the NRF905 chip of NORDIC company for use, and this chip is made up of the receiver of a fully-integrated frequency modulator, a band detuner, a power amplifier, a crystal oscillator and a regulator; Frequency of operation can dispose by software, is arranged on the open ISM band of 433/868/915MHZ, and this device is operated in the 433MHZ frequency range; Maximum data rate 100kb/s, efficient GPSK modulation, 125 channel selections; The error detection of built in hardware CRC check and the control of point-to-multipoint delivery address; 1.9V
-3.6V low-power consumption work, quiescent current only is 2.5 μ A under the standby mode; Transceiver mode is short switching time, less than 650 μ s; Chip can arrange the address by software, can be connected use by direct and various single-chip microcomputers; The power supply of nRF905 separates by electric capacity; In PCB, beat some through holes as much as possible, the ground of top layer and bottom can fully be contacted.
6. acquisition module is the acquisition tasks of changing to finish data by the A/D in the MSP430F149 sheet, and the analog reference voltage of collection adopts the reference voltage in the sheet; Finish by timer A the interval time of data acquisition, when each timer A interrupts arriving, read A/D exactly and transform the data that collect, before read data, stop the A/D conversion earlier, start the A/D conversion reading the data back that finishes, if the data of obtaining, a zone bit notice master routine then is set, tells master routine to obtain new data; Whole module adopts is that the structure of interrupt service routine is finished.
7. the temperature probe of temperature compensation module program has adopted the temperature sensor DS18B20 of U.S. DALLAS semiconductor company as detecting element; This sensor temperature-measuring range is-55 ℃
-+ 125 ℃, the resolution maximum can reach 0.0625 ℃; In addition, this sensor can directly be read the dut temperature value, and it only is connected with three lines when single-chip microcomputer links to each other; After DS18B20 receives the temperature transition order, the conversion of beginning start-up temperature; Temperature value after converting just is stored in the 1st, 2 bytes of its inner high speed temporary storage with the two's complement situation of 16 bit strip sign extended; Single-chip microcomputer can be read this data by one-wire interface, reads the status during read data earlier, after read a high position, data are represented with 0.0625 ℃/LSB form.
8. the display circuit of display routine directly is connected with the data I/O mouth of single-chip microcomputer; P1.0
-P1.7 is used for showing data, P2.0
-P2.3 is used for controlling the strobe state of charactron, such as showing at DS1, only need provide the high-level strobe charactron at the P2.3 pin and just can show; Display module just simply is presented at data on the charactron, and this module comprises that mainly port initialization and data show two parts; The port initialization part: this part is finished P1.0
-P1.7 port, P2.0
-The initial work of P2.3 port is arranged to corresponding input and output direction.
9. the wireless receiving and dispatching program has adopted the nRF905 radio receiving transmitting module that data are carried out long-distance transmissions; The realization of nRF905 module radio transmission-receiving function mainly is by single-chip microcomputer its pin to be controlled to realize.
Power unit adopts the TPS76033 chip of TI company to realize, this chip can finely satisfy this requirements for hardware, and this chip has very little encapsulation in addition.
Reset circuit is the reset circuit that adopts the chip that resets to realize, this system adopts the MAX809 chip.
The system hardware interference protection measure has power supply interference protection measure, channel transmission interference protection measure and printed circuit board (PCB) interference protection measure;
Wherein, the power supply interference protection measure is to add a decoupling capacitor between the power supply of each integrated circuit and ground; In addition, per 10 integrated circuit adds a slice charge and discharge capacitance (be called and hold the discharge appearance), and the optional 10pF high frequency performance of electric capacity is potsherd electric capacity preferably;
Channel transmission interference protection measure is to add wave filter in input channel;
The printed circuit board (PCB) interference protection measure is that power lead has been carried out suitable widening, and power lead and ground wire are being walked upwards and the data line basically identical; Clock circuit is arranged in pcb board near center or the position that ground connection is good, makes clock as far as possible near microprocessor, and keep lead-in wire short as far as possible, simultaneously with the quartz oscillator earthing of casing; Artificial circuit part and digital circuit are partly separated, high speed circuit and low-speed circuits are separated, high-power circuit and small signal circuit are separated, noise element and non-noise element are separated, shorten the lead-in wire between the element simultaneously as far as possible, make the interference and coupling of asking mutually reach minimum.
Claims (4)
1. inflammable gas detection alarm device, it comprises hardware components and software section; Hardware circuit is made up of single chip circuit, data acquisition circuit, temperature-compensation circuit, LED display circuit and data transmission; Software comprises acquisition module program, temperature survey program, display routine, wireless receiving and dispatching program;
It is characterized in that: MSP 430 single-chip microcomputers that single chip circuit uses, the analog to digital converter that has 12 bit resolutions is realized analog acquisition by the A/D passage in the sheet, single-chip microcomputer adopts the interface of the existing digital data acquisition circuit of general I/O cause for gossip, and comes the collection of control figure amount by a general I/O mouth; Utilize the UART in the single-chip microcomputer sheet to realize serial communication; Single-chip microcomputer adopts the clock signal of a 32kHZ, adopts the clock signal of a 8MHZ; The clock part all adopts crystal oscillator to realize; The electric capacity that increases by 0.1 a μ F at the pin of power supply is realized filtering, to reduce the interference that input end is subjected to; Single-chip microcomputer also has the analog power input end in addition, and the analog power input end increases a filter capacitor to reduce interference;
Data acquisition circuit adopts the RS of R0, R9, R10 and TGS813 to constitute an electric bridge, realizes resistance-voltage transitions; An operational amplifier A among the LM324 being connected into voltage follower and resistance R 7, stabilivolt D1 form mu balanced circuit, is the electric bridge power supply; The input end that the voltage of electric bridge conversion is added to another one operational amplifier B among the LM324 amplifies, and adjustable resistance R11 is used for regulating the enlargement factor of amplifying circuit, so that export suitable voltage for the AD conversion of back;
Temperature-compensation circuit has adopted " one-wire bus " digital temperature sensor DS18B20 to carry out temperature survey; Measuring temperature range is-55 ℃
-+ 125 ℃, at-10 ℃
-In+85 ℃ of scopes, precision is no more than ± and 0.5 ℃, ultimate resolution can reach 0.0625 ℃; This sensor contains parasite power, but both unibus power supplies, also available external power source, and have good negative pressure characteristic; Simultaneously, DS18B20 supports 3V
-The voltage range of 5V;
What the LED display circuit adopted is the simple LED display mode, and this display circuit directly is connected P1.0 with the I/O mouth of single-chip microcomputer
-P1.7 is used for showing data, P2.0
-P2.3 is used for controlling the strobe state of charactron;
The data transmission of wireless transmission circuit is selected the NRF905 chip of NORDIC company for use, and this chip is made up of the receiver of a fully-integrated frequency modulator, a band detuner, a power amplifier, a crystal oscillator and a regulator; Frequency of operation can dispose by software, is arranged on the open ISM band of 433/868/915MHZ, and this device is operated in the 433MHZ frequency range; Maximum data rate 100kb/s, efficient GPSK modulation, 125 channel selections; The error detection of built in hardware CRC check and the control of point-to-multipoint delivery address; 1.9V
-3.6V low-power consumption work, quiescent current only is 2.5 μ A under the standby mode; Transceiver mode is short switching time, less than 650 μ s; Chip can arrange the address by software, can be connected use by direct and various single-chip microcomputers; The power supply of nRF905 separates by electric capacity; In PCB, beat some through holes as much as possible, the ground of top layer and bottom can fully be contacted;
Acquisition module is mainly concerned with the operation of A/D conversion and timer A; Be the acquisition tasks of changing to finish data by the A/D in the MSP430F149 sheet, the analog reference voltage of collection adopts the reference voltage in the sheet; Finish by timer A the interval time of data acquisition, when each timer A interrupts arriving, read A/D exactly and transform the data that collect, before read data, stop the A/D conversion earlier, start the A/D conversion reading the data back that finishes, if the data of obtaining, a zone bit notice master routine then is set, tells master routine to obtain new data; Whole module adopts is that the structure of interrupt service routine is finished;
The temperature probe of temperature compensation module program has adopted the temperature sensor DS18B20 of U.S. DALLAS semiconductor company as detecting element; This sensor temperature-measuring range is-55 ℃
-+ 125, the resolution maximum can reach 0.0625 ℃; In addition, this sensor can directly be read the dut temperature value, and it only is connected with three lines when single-chip microcomputer links to each other; After DS18B20 receives the temperature transition order, the conversion of beginning start-up temperature; Temperature value after converting just is stored in the 1st, 2 bytes of its inner high speed temporary storage with the two's complement situation of 16 bit strip sign extended; Single-chip microcomputer can be read this data by one-wire interface, reads the status during read data earlier, after read a high position, data are represented with 0.0625 ℃/LSB form;
The display circuit of display routine directly is connected with the data I/O mouth of single-chip microcomputer; P1.0
-P1.7 is used for showing data, P2.0
-P2.3 is used for controlling the strobe state of charactron, such as showing at DS1, only need provide the high-level strobe charactron at the P2.3 pin and just can show; Display module just simply is presented at data on the charactron, and this module comprises that mainly port initialization and data show two parts; The port initialization part: this part is finished P1.0
-P1.7 port, P2.0
-The initial work of P2.3 port is arranged to corresponding input and output direction;
The wireless receiving and dispatching program has adopted the nRF905 radio receiving transmitting module that data are carried out long-distance transmissions; The realization of nRF905 module radio transmission-receiving function mainly is by single-chip microcomputer its pin to be controlled to realize.
2. inflammable gas detection alarm device according to claim 1 is characterized in that: described power unit adopts the TPS76033 chip of TI company to realize that this chip has very little encapsulation in addition.
3. inflammable gas detection alarm device according to claim 1, it is characterized in that: described reset circuit can adopt the R-C reset circuit, the reset circuit that also can adopt chip to realize, preferred plan are the reset circuits that adopts the chip that resets to realize, this system adopts the MAX809 chip.
4. inflammable gas detection alarm device according to claim 1, it is characterized in that: described hardware components has also been taked the hardware anti-interference measure: power supply interference protection measure, channel transmission interference protection measure and printed circuit board (PCB) interference protection measure; Wherein, the power supply interference protection measure is to add a decoupling capacitor between the power supply of each integrated circuit and ground; In addition, per about 10 integrated circuit adds a slice charge and discharge capacitance (be called and hold the discharge appearance), the optional 10pF high frequency performance of electric capacity is potsherd electric capacity or multi-layer ceramic capacitance preferably, channel transmission interference protection measure is to add wave filter in input channel, the printed circuit board (PCB) interference protection measure is that power lead has been carried out suitable widening, and power lead and ground wire are being walked upwards and the data line basically identical; Clock circuit is arranged in pcb board near center or the position that ground connection is good, makes clock as far as possible near microprocessor, and keep lead-in wire short as far as possible, simultaneously with the quartz oscillator earthing of casing; Artificial circuit part and digital circuit are partly separated, high speed circuit and low-speed circuits are separated, high-power circuit and small signal circuit are separated, noise element and non-noise element are separated, shorten the lead-in wire between the element simultaneously as far as possible, make the interference and coupling of asking mutually reach minimum.
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|---|---|---|---|
| CN 201110446653 CN103185775A (en) | 2011-12-27 | 2011-12-27 | Combustible gas detection alarm device |
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|---|---|---|---|
| CN 201110446653 CN103185775A (en) | 2011-12-27 | 2011-12-27 | Combustible gas detection alarm device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092791A (en) * | 2015-08-12 | 2015-11-25 | 福建美营自动化科技有限公司 | Combustible and explosible gas detection device |
| CN105548266A (en) * | 2015-12-19 | 2016-05-04 | 成都尼奥尔电子科技有限公司 | A wireless natural gas detector based on a notch filter circuit |
| CN105572181A (en) * | 2015-12-19 | 2016-05-11 | 成都尼奥尔电子科技有限公司 | Wireless natural gas detector |
| CN105577191A (en) * | 2015-12-11 | 2016-05-11 | 中国航空工业集团公司西安航空计算技术研究所 | Integrated ADC information sharing circuit based on Xilin FPGA |
| CN105651827A (en) * | 2015-12-19 | 2016-06-08 | 成都尼奥尔电子科技有限公司 | High-precision wireless natural gas detector based on self-gain amplification circuit |
| CN105699430A (en) * | 2016-03-28 | 2016-06-22 | 南通理工学院 | Multifunctional gas concentration detector |
| CN106645584A (en) * | 2016-12-30 | 2017-05-10 | 重庆安迈科技有限公司 | Combustible gas detector and compensation method thereof |
| CN109741590A (en) * | 2019-02-26 | 2019-05-10 | 张家港氢芯电气系统科技有限公司 | Hydrogen fuel cell engine Wireless data acquisition unit |
| CN110726809A (en) * | 2019-10-19 | 2020-01-24 | 北京工业大学 | Design method of high-reliability combustible gas state monitoring and alarming equipment |
-
2011
- 2011-12-27 CN CN 201110446653 patent/CN103185775A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092791A (en) * | 2015-08-12 | 2015-11-25 | 福建美营自动化科技有限公司 | Combustible and explosible gas detection device |
| CN105577191A (en) * | 2015-12-11 | 2016-05-11 | 中国航空工业集团公司西安航空计算技术研究所 | Integrated ADC information sharing circuit based on Xilin FPGA |
| CN105577191B (en) * | 2015-12-11 | 2018-09-21 | 中国航空工业集团公司西安航空计算技术研究所 | ADC information sharing circuits are integrated based on Xilinx FPGA |
| CN105548266A (en) * | 2015-12-19 | 2016-05-04 | 成都尼奥尔电子科技有限公司 | A wireless natural gas detector based on a notch filter circuit |
| CN105572181A (en) * | 2015-12-19 | 2016-05-11 | 成都尼奥尔电子科技有限公司 | Wireless natural gas detector |
| CN105651827A (en) * | 2015-12-19 | 2016-06-08 | 成都尼奥尔电子科技有限公司 | High-precision wireless natural gas detector based on self-gain amplification circuit |
| CN105699430A (en) * | 2016-03-28 | 2016-06-22 | 南通理工学院 | Multifunctional gas concentration detector |
| CN106645584A (en) * | 2016-12-30 | 2017-05-10 | 重庆安迈科技有限公司 | Combustible gas detector and compensation method thereof |
| CN109741590A (en) * | 2019-02-26 | 2019-05-10 | 张家港氢芯电气系统科技有限公司 | Hydrogen fuel cell engine Wireless data acquisition unit |
| CN110726809A (en) * | 2019-10-19 | 2020-01-24 | 北京工业大学 | Design method of high-reliability combustible gas state monitoring and alarming equipment |
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Application publication date: 20130703 |