Wireless Gas Concentration Sensor Based on UWB Band Trapping Function

A gas concentration, ultra-wideband antenna technology, applied in the field of smart sensors, to achieve the effect of improving detection resolution and accuracy, simple structure, and convenient operation

Active Publication Date: 2016-06-15
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is no published solution for the wireless gas sensor based on the above-mentioned technologies.

Method used

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  • Wireless Gas Concentration Sensor Based on UWB Band Trapping Function
  • Wireless Gas Concentration Sensor Based on UWB Band Trapping Function
  • Wireless Gas Concentration Sensor Based on UWB Band Trapping Function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 and Figure 5 As shown, the present invention includes a dielectric substrate 1 and a ground plane 2 arranged on the ground surface of the dielectric substrate 1, and an ultra-wideband antenna 4 arranged on the upper surface of the dielectric substrate 1 and a conduction band 3 and a planar patch type structure , the ultra-broadband antenna 4 is a rectangular shape protruding downward at the middle position of the bottom and having double-step cut corners 4-1 on both sides of the bottom, and the conduction strip 3 and the middle position of the bottom of the ultra-broadband antenna 4 The downward protruding parts are connected, and the middle position of the ultra-wideband antenna 4 is etched with a double-line U-shaped slot line 5 composed of an inner line and an outer line. The inner side of the U-shaped slot line 5 A gas concentration sensor probe 6 is embedded between the line and the outer line; the gas concentration sensor probe 6 includes an int...

Embodiment 2

[0049] Such as figure 2 and Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the number of the gas concentration sensor probes 6 is two, and they are respectively embedded and installed on the two vertical sections of the U-shaped slot line 5, and the gas concentration The first electrode and the second electrode of the interdigitated electrode 7 of the sensor probe 6 are respectively connected to the inner line and the outer line of the vertical section of the U-shaped slot line 5 . All the other structures are the same as in Example 1.

[0050] This embodiment is a wireless gas concentration sensor that uses frequency modulation to detect ultra-broadband bandgap frequency points. The wireless gas concentration sensor is an active detection method. The DC voltage required for palladium-doped single-walled carbon nanotubes 8 comes from a DC power supply 10 , the ultra-wideband signal comes from the ultra-wideband signal generator 12, and i...

Embodiment 3

[0052] Such as figure 2 , Figure 6 and Figure 10 As shown, the difference between this embodiment and Embodiment 1 is that: the probe excitation source is an ultra-broadband microwave DC rectifier 11 , and the conduction band 3 is connected to the ultra-broadband microwave DC rectifier 11 . The ultra-broadband microwave DC rectifier 11 includes a load resistor 17 and a bandpass filter circuit 13, an impedance matching circuit 14, a rectifier circuit 15 and a DC output circuit 16 connected in sequence, and the output terminal of the DC output circuit 16 is connected to the One end of the load resistor 17 is connected and is the positive voltage output terminal V+ of the ultra-wideband microwave DC rectifier 11, and the other end of the load resistor 17 is grounded and is the negative voltage output terminal V- of the ultra-wideband microwave direct current rectifier 11. . All the other structures are the same as in Example 1.

[0053] This embodiment is a wireless gas co...

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PUM

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Abstract

The invention discloses a wireless gas concentration sensor based on the ultra-wideband trapping function, which includes a dielectric substrate, a ground plane, a conduction band and an ultra-wideband antenna. The conduction band is connected to the ultra-wideband antenna, and a U-shaped slot line is etched in the middle of the ultra-wide-band antenna, and a gas concentration sensor probe is embedded in the U-shaped slot line; the gas concentration sensor probe includes interdigitated electrodes, palladium Doped with single-walled carbon nanotubes, avalanche-type Zener diodes and probe excitation sources, palladium-doped single-walled carbon nanotubes are embedded and installed between one finger of the first electrode and one finger of the second electrode of the interdigitated electrode, The interdigitated electrodes, the avalanche type Zener diode and the excitation source of the probe are connected in series. The invention has simple structure, simple and easy sensing mechanism, convenient use and operation, high detection resolution and precision, can realize remote monitoring of gas, and is suitable for gas detection in dangerous environments.

Description

technical field [0001] The invention relates to the technical field of intelligent sensors, in particular to a wireless gas concentration sensor based on an ultra-wide band trapping function. Background technique [0002] Studies have shown that when the concentration of methane gas in the air reaches 4%, an explosion will occur. Therefore, in some environments facing the danger of gas explosion, such as underground coal mines, it is essential to monitor the concentration of methane gas. With the development and progress of wireless sensing technology, remote detection has become one of the safest, most convenient and efficient technical means to monitor gas concentration. technology, and involves the mutual complementation and integration of the two. [0003] Existing sensors for detecting gas concentration include catalytic bead metal oxide sensors and methane plus hydrocarbon gas infrared flame ionization sensors, the detection mechanism of which uses chemical oxidation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
Inventor 刘健
Owner XIAN UNIV OF SCI & TECH
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