CN105571789A - Wireless natural gas detector based on wireless receiving circuit - Google Patents
Wireless natural gas detector based on wireless receiving circuit Download PDFInfo
- Publication number
- CN105571789A CN105571789A CN201510958377.2A CN201510958377A CN105571789A CN 105571789 A CN105571789 A CN 105571789A CN 201510958377 A CN201510958377 A CN 201510958377A CN 105571789 A CN105571789 A CN 105571789A
- Authority
- CN
- China
- Prior art keywords
- triode
- pole
- electric capacity
- resistance
- base stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention discloses a wireless natural gas detector based on a wireless receiving circuit. The wireless natural gas detector mainly comprises a microcontroller, a gas sensor, and a power supply, a display, an alarm, a storage and a wireless receiving circuit which are connected with the microcontroller, an A/D conversion chip connected with the gas sensor, and a wireless transmitting circuit connected with the A/D conversion chip, wherein the wireless transmitting circuit is connected with the wireless receiving circuit through a wireless network. The wireless natural gas detector transmits signals through the wireless network, and detection personnel can detect whether natural gas leakage exists without going to a detection site, thereby providing a safety guarantee for the detection personnel. The detector transmits signals through the wireless transmitting circuit, and can process the signals to enable the signals to be relatively stable in a long-distance transmission process, thereby enabling distance of signal transmission to be relatively long. The detector receives and processes signals through the wireless receiving circuit, thereby enabling received signals to be relatively stable.
Description
Technical field
The present invention relates to a kind of detector, specifically refer to a kind of wireless natural gas detector based on wireless receiving circuit.
Background technology
Along with rock gas is more and more universal, people also more and more pay attention to the use safety of natural gas.Present people use portable natural gas detector whether to have leakage to detect natural gas usually, but natural gas itself also exists diffusion rapidly, the features such as easy blast, after micro-natural gas leaks, at wind-force, under the acting in conjunction of the external conditions such as environment temperature, leakage point can expand rapidly, large-area calamity danger district will be formed within the time that the scene of the accident is extremely short, when people use traditional portable natural gas detector to be tested with when natural gas is revealed as testing staff cannot withdraw at short notice, Site Detection personnel are then easily caused to occur poisoning situation.
Summary of the invention
The object of the invention is to overcome traditional natural gas detector to use at Test Field, bring the defect of personal safety hidden danger to testing staff, a kind of wireless natural gas detector based on wireless receiving circuit is provided.
Object of the present invention is achieved through the following technical solutions: a kind of wireless natural gas detector based on wireless receiving circuit, primarily of microcontroller, gas sensor, the power supply be connected with microcontroller respectively, display, alarm, reservoir and wireless receiving circuit, the A/D conversion chip be connected with gas sensor, and the radio transmitter be connected with A/D conversion chip forms, described radio transmitter is connected with wireless receiving circuit by wireless network, described wireless receiving circuit is by triode VT5, triode VT6, triode VT7, positive pole is connected with antenna, negative pole is then in turn through electric capacity C8 that inductance L 3 is connected with the collector of triode VT7 after resistance R14, be serially connected in the resistance R11 between the negative pole of electric capacity C8 and the base stage of triode VT5, positive pole is connected with the negative pole of electric capacity C8, the electric capacity C9 of minus earth, N pole is connected with the collector of triode VT5 after resistance R12, the diode D5 of P pole ground connection, P pole is connected with the emitter of triode VT5, the diode D6 that N pole is then connected with the base stage of triode VT7 after resistance R13, positive pole is connected with the collector of triode VT5, the electric capacity C10 that negative pole is then connected with the base stage of triode VT6, one end is connected with the collector of triode VT6, the inductance L 4 that the other end is then connected with the tie point of resistance R14 with inductance L 3, positive pole is connected with the emitter of triode VT6, the electric capacity C11 that negative pole is then connected with the emitter of triode VT7, positive pole is connected with the emitter of triode VT7, negative pole then meets the electric capacity C12 of 5V voltage, and positive pole is connected with the collector of triode VT7, the electric capacity C13 of negative pole ground connection after resistance R15 forms, the grounded emitter of described triode VT5, the negative pole of described electric capacity C13 then forms the signal output part of this wireless receiving circuit and is connected with microcontroller.
Further, described radio transmitter by mixting circuit, the common emitter amplifying circuit be connected with mixting circuit, and the radiating circuit be connected with common emitter amplifying circuit forms.
Described mixting circuit is by transformer T, triode VT1, triode VT2, one end is connected with the Same Name of Ends of the former limit telefault of transformer T, the other end then meets the resistance R1 of 5V voltage, be serially connected in the resistance R2 between the Same Name of Ends of the former limit telefault of transformer T and the base stage of triode VT1, positive pole is connected with the collector of triode VT1, the electric capacity C2 that negative pole is then connected with the base stage of triode VT1 after inductance L 1, ground connection while N pole is connected with the negative pole of electric capacity C2, the diode D1 that P pole is then connected with the base stage of triode VT1 after electric capacity C1, the resistance R3 be in parallel with inductance L 1, positive pole is connected with the Same Name of Ends of the former limit telefault of transformer T, the electric capacity C3 of minus earth, resistance R4 between the centre tap being serially connected in the positive pole of electric capacity C3 and the secondary inductance coil of transformer T, N pole is connected with the non-same polarity of the secondary inductance coil of transformer T, the diode D2 that P pole is then connected with the base stage of triode VT2, P pole is connected with the Same Name of Ends of the secondary inductance coil of transformer T, the diode D3 that N pole is then connected with the base stage of triode VT2, and one end is connected with the base stage of triode VT2 after resistance R5, the resistance R6 that the other end is then connected with A/D conversion chip forms, the emitter of described triode VT1 is connected with the non-same polarity of the former limit telefault of transformer T, the base stage of described triode VT2 is all connected with common emitter amplifying circuit with collector, and its emitter is then connected with the positive pole of electric capacity C3.
Described common emitter amplifying circuit is by amplifier P, triode VT3, field effect transistor MOS, be serially connected in the resistance R7 between the output terminal of amplifier P and the base stage of triode VT3, the diode D4 that N pole is connected with the output terminal of amplifier P, P pole is then connected with the grid of field effect transistor MOS, the electric capacity C4 that positive pole is connected with the negative pole of amplifier P, negative pole is then connected with the P pole of diode D4, and positive pole is connected with the collector of triode VT3, the electric capacity C6 of minus earth forms; The positive pole of described amplifier P is connected with the base stage of triode VT2, and its negative pole is then connected with the source electrode of field effect transistor MOS, its output terminal then with while triode VT2 collector be connected with radiating circuit; The grounded drain of described field effect transistor MOS; The emitter of described triode VT3 is then connected with radiating circuit.
Described radiating circuit is by triode VT4, the electric capacity C5 that positive pole is connected with the output terminal of amplifier P, negative pole is then connected with the base stage of triode VT4, be serially connected in the resistance R8 between the base stage of triode VT4 and the emitter of triode VT3, be serially connected in the resistance R10 between the collector of triode VT4 and the emitter of triode VT3, the resistance R9 that one end is connected with the base stage of triode VT4, the other end is then connected with the emitter of triode VT4 after inductance L 2, and the electric capacity C7 that positive pole is connected with the emitter of triode VT4, negative pole connects antenna forms; The tie point of described resistance R9 and inductance L 2 connects 12V voltage.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention is transmitted signal by wireless network, and whether testing staff does not need body to face Test Field can to detect and have natural gas to reveal, thus provides safety guarantee to testing staff.
(2) the present invention is transmitted signal by radio transmitter, and it can process signal, makes signal more stable in the process of long range propagation, thus makes the distance of Signal transmissions of the present invention farther.
(3) the present invention to be received signal by wireless receiving circuit and processes, thus makes the signal that receives more stable.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is the structural representation of radio transmitter of the present invention.
Fig. 3 is the structural representation of wireless receiving circuit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, wireless natural gas detector based on wireless receiving circuit of the present invention, primarily of microcontroller, gas sensor, the power supply be connected with microcontroller respectively, display, alarm, reservoir and wireless receiving circuit, the A/D conversion chip be connected with gas sensor, and the radio transmitter be connected with A/D conversion chip forms; Described radio transmitter is connected with wireless receiving circuit by wireless network.
Wherein, the MD61 type sensor of natural gas that gas sensor adopts Shanghai Mei Si Electronic Science and Technology Co., Ltd. to produce, the sensor of natural gas of this model is highly sensitive, the life-span is long, with low cost.The simulating signal that this A/D conversion chip is used for gas sensor exports is converted to digital electric signal, it preferentially adopts ADC0809 type A/D conversion chip, the EOC pin of this ADC0809 type A/D conversion chip is connected with the output terminal of gas sensor, and its ALE pin is then connected with the signal input part of radio transmitter.This radio transmitter is used for carrying out process afterwards and send to wireless receiving circuit by wireless network to the digital electric signal that A/D conversion chip exports.As shown in Figure 2, this radio transmitter by mixting circuit, the common emitter amplifying circuit be connected with mixting circuit, and the radiating circuit be connected with common emitter amplifying circuit forms.
Wherein, described mixting circuit is by transformer T, and triode VT1, triode VT2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, inductance L 1, electric capacity C1, electric capacity C2, electric capacity C3, diode D1, diode D2 and diode D3 form.
During connection, one end of resistance R1 is connected with the Same Name of Ends of the former limit telefault of transformer T, its other end then connects 5V voltage.Between the Same Name of Ends that resistance R2 is serially connected in the former limit telefault of transformer T and the base stage of triode VT1.The positive pole of electric capacity C2 is connected with the collector of triode VT1, its negative pole is then connected with the base stage of triode VT1 after inductance L 1.While the N pole of diode D1 is connected with the negative pole of electric capacity C2, ground connection, its P pole are then connected with the negative pole of electric capacity C1.The positive pole of described electric capacity C1 is then connected with the base stage of triode VT1.Resistance R3 and inductance L 1 are in parallel.The positive pole of electric capacity C3 is connected with the Same Name of Ends of the former limit telefault of transformer T, its minus earth.Resistance R4 is serially connected between the centre tap of the positive pole of electric capacity C3 and the secondary inductance coil of transformer T.The N pole of diode D2 is connected with the non-same polarity of the secondary inductance coil of transformer T, its P pole is then connected with the base stage of triode VT2.The P pole of diode D3 is connected with the Same Name of Ends of the secondary inductance coil of transformer T, its N pole is then connected with the base stage of triode VT2.The signal input part that one end of resistance R6 is connected with the base stage of triode VT2 after resistance R5, its other end then forms this mixting circuit is also connected with the ALE pin of ADC0809 type A/D conversion chip.The emitter of described triode VT1 is connected with the non-same polarity of the former limit telefault of transformer T.The base stage of described triode VT2 is all connected with common emitter amplifying circuit with collector, and its emitter is then connected with the positive pole of electric capacity C3.
In said structure, electric capacity C1, diode D1, electric capacity C2 and triode VT1 forms oscillatory circuit, it can produce a local oscillation signal, after the digital electric signal of A/D conversion chip output is come in from the signal input part input of this mixting circuit, mixting circuit carries out mixing digital electric signal and its local oscillation signal, and exports radiofrequency signal to common emitter amplifying circuit.
Described common emitter amplifying circuit is by amplifier P, triode VT3, field effect transistor MOS, be serially connected in the resistance R7 between the output terminal of amplifier P and the base stage of triode VT3, the diode D4 that N pole is connected with the output terminal of amplifier P, P pole is then connected with the grid of field effect transistor MOS, the electric capacity C4 that positive pole is connected with the negative pole of amplifier P, negative pole is then connected with the P pole of diode D4, and positive pole is connected with the collector of triode VT3, the electric capacity C6 of minus earth forms.
The positive pole of this amplifier P is connected with the base stage of triode VT2, and its negative pole is then connected with the source electrode of field effect transistor MOS, its output terminal then with while triode VT2 collector be connected with radiating circuit.The grounded drain of described field effect transistor MOS.The emitter of described triode VT3 is then connected with radiating circuit.
The radiofrequency signal exported from mixting circuit carries out inputting radiating circuit after distortionless amplification through common emitter amplifying circuit, and radiofrequency signal is after treatment more stable.
Described radiating circuit is by triode VT4, and resistance R8, resistance R9, resistance R10, inductance L 2, electric capacity C5 and electric capacity C7 forms.During connection, the positive pole of electric capacity C5 is connected with the output terminal of amplifier P, its negative pole is then connected with the base stage of triode VT4.Resistance R8 is serially connected between the base stage of triode VT4 and the emitter of triode VT3.Resistance R10 is serially connected between the collector of triode VT4 and the emitter of triode VT3.One end of resistance R9 is connected with the base stage of triode VT4, its other end is then connected with the emitter of triode VT4 after inductance L 2.The electric capacity C7 that positive pole is connected with the emitter of triode VT4, negative pole connects antenna forms.The tie point of described resistance R9 and inductance L 2 connects 12V voltage.This radiofrequency signal sends to wireless receiving circuit by radiating circuit by wireless network.
In addition, the radiofrequency signal that wireless receiving circuit sends for receiving radio transmitter, as shown in Figure 3, it is by triode VT5, triode VT6, triode VT7, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, inductance L 3, inductance L 4, diode D5 and diode D6 forms.
During connection, the positive pole of electric capacity C8 is connected with antenna, its negative pole is then connected with the collector of triode VT7 after resistance R14 through inductance L 3 in turn.Resistance R11 is serially connected between the negative pole of electric capacity C8 and the base stage of triode VT5.The positive pole of electric capacity C9 is connected with the negative pole of electric capacity C8, its minus earth.The N pole of diode D5 is connected with the collector of triode VT5 after resistance R12, its P pole ground connection.The P pole of diode D6 is connected with the emitter of triode VT5, its N pole is then connected with the base stage of triode VT7 after resistance R13.The positive pole of electric capacity C10 is connected with the collector of triode VT5, its negative pole is then connected with the base stage of triode VT6.One end of inductance L 4 is connected with the collector of triode VT6, its other end is then connected with the tie point of inductance L 3 with resistance R14.The positive pole of electric capacity C11 is connected with the emitter of triode VT6, its negative pole is then connected with the emitter of triode VT7.The positive pole of electric capacity C12 is connected with the emitter of triode VT7, negative pole then connects 5V voltage.The positive pole of electric capacity C13 is connected with the collector of triode VT7, its negative pole ground connection after resistance R15.The grounded emitter of described triode VT5.The negative pole of described electric capacity C13 then forms the signal output part of this wireless receiving circuit and is connected with microcontroller.
The signal received leaches the digital electric signal of 315MHz frequency range through the sample circuit that electric capacity C8 and inductance L 3 form, and this digital electric signal amplifies through triode VT5 again.Electric capacity C11, electric capacity C12, triode VT6, triode VT7, inductance L 4 and resistance R14 then form oscillatory circuit, and this oscillatory circuit sends local oscillation signal, and this wireless receiving circuit carries out the voltage signal of stable output after mixing digital electric signal and local oscillation signal.
Microcontroller is then as control center of the present invention, it preferentially adopts MAX716 type micro-chip processor, and the B1 pin of this MAX716 type micro-chip processor is connected with the signal output part of wireless receiving circuit, and its UCC pin connects power supply, its B7 pin connects display, and B5 pin is device taking alarm then.This power supply is used for providing working power to microcontroller, and display is then for showing the concentration value of natural gas, and alarm is then for sounding the alarm when having detected that natural gas is revealed, and this reservoir is then for storing the concentration value of natural gas.
During work, if natural gas is not revealed, the present invention then can not send alerting signal.When there being natural gas to reveal, gas sensor detects in air and has inflammable gas, the conductivity of gas sensor increases with the increase of combustable gas concentration in air, and gas sensor is converted to the simulating signal corresponding with this combustable gas concentration the change of conductivity and exports to A/D change-over circuit simultaneously.This A/D change-over circuit sends through radio transmitter after simulating signal is converted to digital electric signal.This radio transmitter sends to wireless receiving circuit by wireless network after processing digital electric signal, and wireless receiving circuit then sends to microcontroller digital electric signal.The digital electric signal of microcontroller to input identifies and sends to display, reservoir and alarm respectively after being converted to natural gas concentration signal, this display demonstrates combustable gas concentration value, reservoir then stores this natural gas concentration value, and alarm sounds the alarm simultaneously.
As mentioned above, just well the present invention can be realized.
Claims (5)
1. the wireless natural gas detector based on wireless receiving circuit, primarily of microcontroller, gas sensor, the power supply be connected with microcontroller respectively, display, alarm, reservoir and wireless receiving circuit, the A/D conversion chip be connected with gas sensor, and the radio transmitter be connected with A/D conversion chip forms, described radio transmitter is connected with wireless receiving circuit by wireless network, it is characterized in that, described wireless receiving circuit is by triode VT5, triode VT6, triode VT7, positive pole is connected with antenna, negative pole is then in turn through electric capacity C8 that inductance L 3 is connected with the collector of triode VT7 after resistance R14, be serially connected in the resistance R11 between the negative pole of electric capacity C8 and the base stage of triode VT5, positive pole is connected with the negative pole of electric capacity C8, the electric capacity C9 of minus earth, N pole is connected with the collector of triode VT5 after resistance R12, the diode D5 of P pole ground connection, P pole is connected with the emitter of triode VT5, the diode D6 that N pole is then connected with the base stage of triode VT7 after resistance R13, positive pole is connected with the collector of triode VT5, the electric capacity C10 that negative pole is then connected with the base stage of triode VT6, one end is connected with the collector of triode VT6, the inductance L 4 that the other end is then connected with the tie point of resistance R14 with inductance L 3, positive pole is connected with the emitter of triode VT6, the electric capacity C11 that negative pole is then connected with the emitter of triode VT7, positive pole is connected with the emitter of triode VT7, negative pole then meets the electric capacity C12 of 5V voltage, and positive pole is connected with the collector of triode VT7, the electric capacity C13 of negative pole ground connection after resistance R15 forms, the grounded emitter of described triode VT5, the negative pole of described electric capacity C13 then forms the signal output part of this wireless receiving circuit and is connected with microcontroller.
2. a kind of wireless natural gas detector based on wireless receiving circuit according to claim 1, it is characterized in that: described radio transmitter is by mixting circuit, the common emitter amplifying circuit be connected with mixting circuit, and the radiating circuit be connected with common emitter amplifying circuit forms.
3. a kind of wireless natural gas detector based on wireless receiving circuit according to claim 2, it is characterized in that: described mixting circuit is by transformer T, triode VT1, triode VT2, one end is connected with the Same Name of Ends of the former limit telefault of transformer T, the other end then meets the resistance R1 of 5V voltage, be serially connected in the resistance R2 between the Same Name of Ends of the former limit telefault of transformer T and the base stage of triode VT1, positive pole is connected with the collector of triode VT1, the electric capacity C2 that negative pole is then connected with the base stage of triode VT1 after inductance L 1, ground connection while N pole is connected with the negative pole of electric capacity C2, the diode D1 that P pole is then connected with the base stage of triode VT1 after electric capacity C1, the resistance R3 be in parallel with inductance L 1, positive pole is connected with the Same Name of Ends of the former limit telefault of transformer T, the electric capacity C3 of minus earth, resistance R4 between the centre tap being serially connected in the positive pole of electric capacity C3 and the secondary inductance coil of transformer T, N pole is connected with the non-same polarity of the secondary inductance coil of transformer T, the diode D2 that P pole is then connected with the base stage of triode VT2, P pole is connected with the Same Name of Ends of the secondary inductance coil of transformer T, the diode D3 that N pole is then connected with the base stage of triode VT2, and one end is connected with the base stage of triode VT2 after resistance R5, the resistance R6 that the other end is then connected with A/D conversion chip forms, the emitter of described triode VT1 is connected with the non-same polarity of the former limit telefault of transformer T, the base stage of described triode VT2 is all connected with common emitter amplifying circuit with collector, and its emitter is then connected with the positive pole of electric capacity C3.
4. a kind of wireless natural gas detector based on wireless receiving circuit according to claim 3, it is characterized in that: described common emitter amplifying circuit is by amplifier P, triode VT3, field effect transistor MOS, be serially connected in the resistance R7 between the output terminal of amplifier P and the base stage of triode VT3, N pole is connected with the output terminal of amplifier P, the diode D4 that P pole is then connected with the grid of field effect transistor MOS, positive pole is connected with the negative pole of amplifier P, the electric capacity C4 that negative pole is then connected with the P pole of diode D4, and positive pole is connected with the collector of triode VT3, the electric capacity C6 of minus earth forms, the positive pole of described amplifier P is connected with the base stage of triode VT2, and its negative pole is then connected with the source electrode of field effect transistor MOS, its output terminal then with while triode VT2 collector be connected with radiating circuit, the grounded drain of described field effect transistor MOS, the emitter of described triode VT3 is then connected with radiating circuit.
5. a kind of wireless natural gas detector based on wireless receiving circuit according to claim 4, it is characterized in that: described radiating circuit is by triode VT4, positive pole is connected with the output terminal of amplifier P, the electric capacity C5 that negative pole is then connected with the base stage of triode VT4, be serially connected in the resistance R8 between the base stage of triode VT4 and the emitter of triode VT3, be serially connected in the resistance R10 between the collector of triode VT4 and the emitter of triode VT3, one end is connected with the base stage of triode VT4, the resistance R9 that the other end is then connected with the emitter of triode VT4 after inductance L 2, and positive pole is connected with the emitter of triode VT4, the electric capacity C7 that negative pole connects antenna forms, the tie point of described resistance R9 and inductance L 2 connects 12V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958377.2A CN105571789A (en) | 2015-12-19 | 2015-12-19 | Wireless natural gas detector based on wireless receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958377.2A CN105571789A (en) | 2015-12-19 | 2015-12-19 | Wireless natural gas detector based on wireless receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105571789A true CN105571789A (en) | 2016-05-11 |
Family
ID=55882175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510958377.2A Withdrawn CN105571789A (en) | 2015-12-19 | 2015-12-19 | Wireless natural gas detector based on wireless receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105571789A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1546670A2 (en) * | 2002-09-27 | 2005-06-29 | Honeywell International, Inc. | Low power gas leak detector |
| US20070261505A1 (en) * | 2005-05-13 | 2007-11-15 | Nunally Patrick O | Systems and methods for operational, systems or integrity management of natural gas pipeline infrastructures |
| CN201845420U (en) * | 2010-11-05 | 2011-05-25 | 河南理工大学 | Sensor-based wireless communication network alarm system |
| CN201926474U (en) * | 2010-12-15 | 2011-08-10 | 成都伦力表具有限公司 | Intelligent gas meter capable of preventing gas leakage |
| CN201972688U (en) * | 2011-03-25 | 2011-09-14 | 陈福明 | Shaft flow rate monitoring instrument |
| CN202082629U (en) * | 2011-04-06 | 2011-12-21 | 黄定军 | Natural gas pipeline leakage monitoring system |
| CN202422369U (en) * | 2011-12-30 | 2012-09-05 | 成都市三宇仪表科技发展有限公司 | Gas leakage linkage alarm device |
| CN203179236U (en) * | 2012-11-30 | 2013-09-04 | 陕西视联科技有限公司 | Remote natural gas detection alarm system |
| CN103294037A (en) * | 2013-06-09 | 2013-09-11 | 河南财经政法大学 | Natural gas vehicle gas wireless monitoring controller based on CC2530 and control method thereof |
| CN103364365A (en) * | 2013-07-05 | 2013-10-23 | 扬州大学 | WSN (Wireless Sensor Network) sensor node for natural gas content in air |
-
2015
- 2015-12-19 CN CN201510958377.2A patent/CN105571789A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1546670A2 (en) * | 2002-09-27 | 2005-06-29 | Honeywell International, Inc. | Low power gas leak detector |
| US20070261505A1 (en) * | 2005-05-13 | 2007-11-15 | Nunally Patrick O | Systems and methods for operational, systems or integrity management of natural gas pipeline infrastructures |
| CN201845420U (en) * | 2010-11-05 | 2011-05-25 | 河南理工大学 | Sensor-based wireless communication network alarm system |
| CN201926474U (en) * | 2010-12-15 | 2011-08-10 | 成都伦力表具有限公司 | Intelligent gas meter capable of preventing gas leakage |
| CN201972688U (en) * | 2011-03-25 | 2011-09-14 | 陈福明 | Shaft flow rate monitoring instrument |
| CN202082629U (en) * | 2011-04-06 | 2011-12-21 | 黄定军 | Natural gas pipeline leakage monitoring system |
| CN202422369U (en) * | 2011-12-30 | 2012-09-05 | 成都市三宇仪表科技发展有限公司 | Gas leakage linkage alarm device |
| CN203179236U (en) * | 2012-11-30 | 2013-09-04 | 陕西视联科技有限公司 | Remote natural gas detection alarm system |
| CN103294037A (en) * | 2013-06-09 | 2013-09-11 | 河南财经政法大学 | Natural gas vehicle gas wireless monitoring controller based on CC2530 and control method thereof |
| CN103364365A (en) * | 2013-07-05 | 2013-10-23 | 扬州大学 | WSN (Wireless Sensor Network) sensor node for natural gas content in air |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203055121U (en) | Soil compaction data wireless transmitting device based on Zigbee technology | |
| CN202494785U (en) | Metal detector | |
| CN105572181A (en) | Wireless natural gas detector | |
| CN105488960A (en) | Wireless natural gas detector based on self-gain amplification circuit | |
| CN105571789A (en) | Wireless natural gas detector based on wireless receiving circuit | |
| CN105651827A (en) | High-precision wireless natural gas detector based on self-gain amplification circuit | |
| CN105548266A (en) | A wireless natural gas detector based on a notch filter circuit | |
| CN105551198A (en) | Long-distance wireless natural gas detector based on trap wave filtering circuit | |
| CN106441497A (en) | Signal buffering and amplifying type water level early warning system based on Internet-of-Things technology | |
| CN203931175U (en) | Telepilot detector | |
| CN105590416A (en) | Long-distance wireless natural gas detector based on self-gain amplification circuit | |
| CN105608846A (en) | High precision wireless natural gas detector based on notch filter circuit | |
| CN206726424U (en) | A kind of wireless gas sensor detection circuit | |
| CN205029789U (en) | City pipeline safety is surveyed and monitored control system | |
| CN209674384U (en) | Fully automated management information collecting device | |
| CN101493372A (en) | Leakage detection device based on wireless communication | |
| CN203162557U (en) | On-line monitoring system for leakage of city water supply pipe network | |
| CN106770998A (en) | A kind of food security integral type detection platform | |
| CN206146598U (en) | Underground pipe gallery gas pipeline monitoring system based on intelligent robot | |
| CN205826815U (en) | A kind of PCBA board test equipment | |
| CN217181030U (en) | Shore power box voltage abnormity alarm device | |
| CN206756271U (en) | Ultrasonic liquid level measuring and warning system | |
| CN205405827U (en) | Wireless temperature and humidity measurement and alarm system | |
| CN205879349U (en) | Reinforced earth retaining wall shakes alarm system based on acousto -optic warning | |
| CN204422062U (en) | A kind of environmental noise tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160511 |
|
| WW01 | Invention patent application withdrawn after publication |