CN106004789A - Antitheft alarm with function of detecting radio-frequency interference signal - Google Patents
Antitheft alarm with function of detecting radio-frequency interference signal Download PDFInfo
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- CN106004789A CN106004789A CN201610554595.4A CN201610554595A CN106004789A CN 106004789 A CN106004789 A CN 106004789A CN 201610554595 A CN201610554595 A CN 201610554595A CN 106004789 A CN106004789 A CN 106004789A
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- circuit
- voltage comparator
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- signal
- comparator circuit
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
- B60R25/042—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor operating on the fuel supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
- B60R25/044—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor by limiting or blocking the air supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/30—Detection related to theft or to other events relevant to anti-theft systems
- B60R25/33—Detection related to theft or to other events relevant to anti-theft systems of global position, e.g. by providing GPS coordinates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention specifically relates to an antitheft alarm with a function of detecting a radio-frequency interference signal. The antitheft alarm comprises an antenna, a power wave-detecting circuit, a voltage comparator circuit and an alarm circuit, wherein an input end of the power wave-detecting circuit is electrically connected with the antenna while an output end is electrically connected with the input end of the voltage comparator circuit; the output end of the voltage comparator circuit is electrically connected with the alarm circuit; the antenna is used for receiving a radio signal in a surrounding environment and sending to the power wave-detecting circuit; the power wave-detecting circuit is used for outputting a voltage signal with an amplitude value changing in proportion to the radio signal power; the voltage comparator circuit is used for judging if the amplitude value of the voltage signal is more than a threshold value and sending an alarming signal to the alarm circuit. According to the technical scheme provided by the invention, the power of the radio-frequency interference signal is detected for judging if the vehicle is stolen.
Description
Technical field
The present invention relates to technical field of generators, be specifically related to one and there is Radio Frequency Interfere detection function
Burglar alarm.
Background technology
Currently, means of crime presents newcooperative medical system, intelligentized trend.Cartheft is had to utilize automobile to do very much
Disturb device to carry out stealing car.Automobile interference unit substantially a kind of signal shielding device, does not have decoding, unblock etc.
Function, launches the interference electromagnetic wave with vehicle communication device same frequency, can stop normal when car locking
Vehicle-locking signal, or interference vehicle GPS network communication signal, GPS, Big Dipper framing signal etc., it is achieved
Illegal objective.Existing burglar alarm cannot detect the Radio Frequency Interfere that automobile interference unit sends,
Safety is the highest.
Power is the important parameter characterizing radiofrequency signal characteristic, along with the development of mobile communication technology,
Accurate measurement to RF signal power has become the important ring during radio communication is measured.Radio frequency power meter
Generally it is made up of power sensor (or claiming power probe) and power indicator two parts, measures according to energy meter
The connected mode of circuit, energy meter can be divided into absorption (also known as terminal type) and by formula two kinds, absorption merit
Rate meter is using power probe as the terminator of system under test (SUT), and it absorbs all treats power scale, and by indicating
Device shows the performance number recorded.Prior art also lacks the radiofrequency signal sent by detection automobile interference unit
Power judges the technical scheme that automobile is the most stolen.
Summary of the invention
In view of this, it is an object of the invention to overcome the deficiencies in the prior art, it is provided that there is Radio frequency interference
The burglar alarm of signal testing function, it is achieved by detecting the power of Radio Frequency Interfere, it is judged that vehicle
The most stolen.
For realizing object above, the present invention adopts the following technical scheme that
A kind of burglar alarm with Radio Frequency Interfere detection function, including: antenna, power detection
Circuit, voltage comparator circuit and warning circuit, wherein,
Described power detection circuit, input is connected with described antenna electric, and outfan is with described voltage ratio relatively
The input electrical connection of circuit；The outfan of described voltage comparator circuit electrically connects with described warning circuit；
Described antenna receives the radio signal in surrounding, is sent to described power detection circuit；Institute
State the voltage signal of power detection circuit output amplitude change proportional to described radio signal power；Institute
State voltage comparator circuit and judge whether the amplitude of described voltage signal is more than threshold value, and to described warning circuit
Output alarm signal.
Preferably, described in there is the burglar alarm of Radio Frequency Interfere detection function, also include with described
The wireless signal transmission unit of the outfan electrical connection of voltage comparator circuit, described wireless signal transmission unit
With the intelligent terminal's wireless connections arranged in a mobile device, described wireless signal transmission unit is used for basis
The output signal of described voltage comparator circuit sends warning message to described intelligent terminal.
Preferably, the outfan of described voltage comparator circuit is also electric with the control unit of vehicle GPS localizer
Connecting, the control unit of vehicle GPS localizer controls car according to the output signal of described voltage comparator circuit
Oil-break power break.
Preferably, the outfan of described voltage comparator circuit also control unit with vehicle centrally controrlled locking system is electrically connected
Connecing, the control unit of vehicle centrally controrlled locking system controls vehicle according to the output signal of described voltage comparator circuit
Electronic lock latches automatically.
Preferably, described power detection circuit includes: power detection chip U1, resistance R1, electric capacity C4,
C7, coupling electric capacity C1, decoupling capacitor C2, C3, C5, C6, wherein,
The model of power detection chip U1 is AD8362, totally 16 pins, No. 2 pins of chip U1
By electric capacity C4 ground connection, No. 3 pins are by decoupling capacitor C3 ground connection, and No. 4 pins are by coupling electric capacity
C1 meets antenna P1, and No. 6 pins are by decoupling capacitor C2 ground connection, simultaneously by decoupling capacitor C2 and resistance
R1 connects, and wherein resistance R1 is also connected with antenna P1；No. 9 pins are by electric capacity C7 ground connection；No. 11
Pin and No. 12 pins are connected with the input of voltage comparator circuit after being connected；No. 13 pins are in parallel
Decoupling capacitor C5 and C6 ground connection, the most external+5V DC source；No. 14 are connected with No. 15 pins；5
Number pin is vacant；No. 1, No. 7, No. 8, No. 10, No. 16 pin ground connection.
Preferably, described voltage comparator circuit includes: amplifier U2-A and resistance R3, R4, wherein,
No. 11 of the normal phase input end of amplifier U2-A and power detection chip U1 and No. 12 pins are connected, instead
Phase input passes through resistance R3 external+5V DC source, simultaneously by resistance R4 ground connection, and amplifier U2-A
Outfan be connected with the input of warning circuit.
Preferably, described warning circuit includes: NPN type triode Q1, buzzer U3 and resistance R2,
R5, wherein, the base stage of NPN type triode Q1 is by the outfan of resistance R2 and amplifier U2-A even
Connecing, colelctor electrode is connected with the signal input part of buzzer U3, grounded emitter；The power supply of buzzer U3
Input passes through resistance R5 external+5V DC source.
Preferably, described resistance R3 and R4 is adjustable resistance, described threshold value by regulation resistance R3 and
The resistance value of R4 is set.
Preferably, described in there is the burglar alarm of Radio Frequency Interfere detection function, also include preventing dust
Water shell, described power detection circuit, voltage comparator circuit and warning circuit be arranged in described shell,
Described shell is provided with the through hole making described antenna P1 and buzzer U3 lean out described shell.
Preferably, described in there is the burglar alarm of Radio Frequency Interfere detection function, also include charged electrical
Pond, described rechargeable battery is for powering for described power detection circuit, voltage comparator circuit and warning circuit.
The present invention uses above technical scheme, at least possesses following beneficial effect:
As shown from the above technical solution, what the present invention provided this has Radio Frequency Interfere detection function
Burglar alarm, can by the radio signal that antenna is received by power detection circuit be converted to amplitude with
The voltage signal of the proportional change of described radio signal power, voltage comparator circuit can interpolate that described electricity
Whether the amplitude of pressure signal is more than threshold value, and to warning circuit output alarm signal.Compared to existing technology,
The power by detecting Radio Frequency Interfere can be realized, it is judged that vehicle is the most stolen.
Accompanying drawing explanation
A kind of anti-theft journal with Radio Frequency Interfere detection function that Fig. 1 provides for one embodiment of the invention
The schematic block circuit diagram of alert device；
A kind of anti-theft journal with Radio Frequency Interfere detection function that Fig. 2 provides for one embodiment of the invention
The circuit theory diagrams of alert device.
Detailed description of the invention
Below by drawings and Examples, technical scheme is described in further detail.
Seeing Fig. 1, a kind of of one embodiment of the invention offer has the antitheft of Radio Frequency Interfere detection function
Alarm, including: antenna 1, power detection circuit 2, voltage comparator circuit 3 and warning circuit 4, its
In,
Described power detection circuit 2, input electrically connects with described antenna 1, outfan and described voltage ratio
The input electrical connection of relatively circuit 3；The outfan of described voltage comparator circuit 3 and described warning circuit 4
Electrical connection；
Described antenna 1 receives the radio signal in surrounding, is sent to described power detection circuit 2；
The voltage signal of described power detection circuit 2 output amplitude change proportional to described radio signal power；
Described voltage comparator circuit 3 judges whether the amplitude of described voltage signal is more than threshold value, and to described warning
Circuit 4 output alarm signal.
It should be noted that described threshold value is done according to the radio frequency launching the most common automobile interference unit
The power disturbing signal carries out setting after statistical analysis.
As shown from the above technical solution, what the present invention provided this has Radio Frequency Interfere detection function
Burglar alarm, can by the radio signal that antenna is received by power detection circuit be converted to amplitude with
The voltage signal of the proportional change of described radio signal power, voltage comparator circuit can interpolate that described electricity
Whether the amplitude of pressure signal is more than threshold value, and to warning circuit output alarm signal.Compared to existing technology,
The power by detecting Radio Frequency Interfere can be realized, it is judged that vehicle is the most stolen.
Preferably, described in there is the burglar alarm of Radio Frequency Interfere detection function, also include with described
The wireless signal transmission unit of the outfan electrical connection of voltage comparator circuit 3, described wireless signal transmission list
Unit and the intelligent terminal's wireless connections arranged in a mobile device, described wireless signal transmission unit is used for root
Warning message is sent to described intelligent terminal according to the output signal of described voltage comparator circuit 3.
Preferably, the outfan of described voltage comparator circuit 3 also with the control unit of vehicle GPS localizer
Electrical connection, the control unit of vehicle GPS localizer is according to the output signal control of described voltage comparator circuit 3
Vehicle oil-break power break processed.
Preferably, the outfan of described voltage comparator circuit 3 is also electric with the control unit of vehicle centrally controrlled locking system
Connecting, the control unit of vehicle centrally controrlled locking system controls car according to the output signal of described voltage comparator circuit 3
Electronic lock automatically latch.
It is understood that when voltage comparator circuit judges that the voltage magnitude that power detection circuit exports is more than
During threshold value, while warning circuit output alarm signal, the control unit of vehicle GPS localizer according to
The output signal of described voltage comparator circuit controls vehicle oil-break power break, the control unit of vehicle centrally controrlled locking system
Output signal according to described voltage comparator circuit controls the electronic lock of vehicle and automatically latches, can be the most anti-
Only vehicle stolen car thief steals.
See Fig. 2, it is preferable that described power detection circuit 2 includes:
Power detection chip U1, resistance R1, electric capacity C4, C7, coupling electric capacity C1, decoupling capacitor C2,
C3, C5, C6, wherein, C4 determines the 3dB cut-off point of input signal high pass filter, and C7 is loop
Wave filter integrating capacitor,
The model of power detection chip U1 is AD8362, totally 16 pins, No. 2 pins of chip U1
By electric capacity C4 ground connection, No. 3 pins are by decoupling capacitor C3 ground connection, and No. 4 pins are by coupling electric capacity
C1 meets antenna P1, and No. 6 pins are by decoupling capacitor C2 ground connection, simultaneously by decoupling capacitor C2 and resistance
R1 connects, and wherein resistance R1 is also connected with antenna P1；No. 9 pins are by electric capacity C7 ground connection；No. 11
Pin and No. 12 pins are connected with the input of voltage comparator circuit after being connected；No. 13 pins are in parallel
Decoupling capacitor C5 and C6 ground connection, the most external+5V DC source；No. 14 are connected with No. 15 pins；5
Number pin is vacant；No. 1, No. 7, No. 8, No. 10, No. 16 pin ground connection.
Preferably, described voltage comparator circuit 3 includes: amplifier U2-A and resistance R3, R4, wherein,
No. 11 of the normal phase input end of amplifier U2-A and power detection chip U1 and No. 12 pins are connected, instead
Phase input passes through resistance R3 external+5V DC source, simultaneously by resistance R4 ground connection, and amplifier U2-A
Outfan be connected with the input of warning circuit.
Preferably, described warning circuit 4 includes: NPN type triode Q1, buzzer U3 and resistance R2,
R5, wherein, the base stage of NPN type triode Q1 is by the outfan of resistance R2 and amplifier U2-A even
Connecing, colelctor electrode is connected with the signal input part of buzzer U3, grounded emitter；The power supply of buzzer U3
Input passes through resistance R5 external+5V DC source.
Preferably, described resistance R3 and R4 is adjustable resistance, described threshold value by regulation resistance R3 and
The resistance value of R4 is set.
The work of the circuit theory diagrams of the burglar alarm with Radio Frequency Interfere detection function shown in Fig. 2
As principle it is: when antenna P1 receives high-power RF interference signal, the 11 of power detection chip U1
Number and No. 12 pins output high level, when No. 11 of power detection chip U1 and No. 12 pins export
When high level amplitude is more than voltage magnitude (the most above-mentioned threshold value) of amplifier U2-A inverting input, put
Big device U2-A exports high level signal, and NPN type triode Q1 turns on, and controls buzzer U3 and sends report
Alert sound.
Preferably, described in there is the burglar alarm of Radio Frequency Interfere detection function, also include preventing dust
Water shell, described power detection circuit 2, voltage comparator circuit 3 and warning circuit 4 are arranged on described shell
In, described shell is provided with the through hole making described antenna P1 and buzzer U3 lean out described shell.
Preferably, described in there is the burglar alarm of Radio Frequency Interfere detection function, also include charged electrical
Pond, described rechargeable battery is used for as described power detection circuit 2, voltage comparator circuit 3 and warning circuit 4
Power supply.
The present invention is not limited to above-mentioned preferred forms, and anyone can draw it under the enlightenment of the present invention
His various forms of products, no matter but in its shape or structure, make any change, every have and this Shen
Please same or like as technical scheme, within all falling within protection scope of the present invention.Term " first ",
" second " is only used for describing purpose, and it is not intended that indicate or hint relative importance.Term is " many
Individual " refer to two or more, unless otherwise clear and definite restriction.
Claims (10)
1. a burglar alarm with Radio Frequency Interfere detection function, it is characterised in that including:
Antenna, power detection circuit, voltage comparator circuit and warning circuit, wherein,
Described power detection circuit, input is connected with described antenna electric, and outfan is with described voltage ratio relatively
The input electrical connection of circuit；The outfan of described voltage comparator circuit electrically connects with described warning circuit；
Described antenna receives the radio signal in surrounding, is sent to described power detection circuit；Institute
State the voltage signal of power detection circuit output amplitude change proportional to described radio signal power；Institute
State voltage comparator circuit and judge whether the amplitude of described voltage signal is more than threshold value, and to described warning circuit
Output alarm signal.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 1, its
It is characterised by, also includes the wireless signal transmission unit electrically connected with the outfan of described voltage comparator circuit,
Described wireless signal transmission unit and the intelligent terminal's wireless connections arranged in a mobile device, described wireless
Signal transmitter unit is for sending report according to the output signal of described voltage comparator circuit to described intelligent terminal
Alarming information.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 1, its
Being characterised by, the outfan of described voltage comparator circuit also control unit with vehicle GPS localizer is electrically connected
Connecing, the control unit of vehicle GPS localizer controls vehicle according to the output signal of described voltage comparator circuit
Oil-break power break.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 1, its
Being characterised by, the outfan of described voltage comparator circuit also control unit with vehicle centrally controrlled locking system electrically connects,
The control unit of vehicle centrally controrlled locking system controls the electronics of vehicle according to the output signal of described voltage comparator circuit
Lock latches automatically.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 1, its
Being characterised by, described power detection circuit includes: power detection chip U1, resistance R1, electric capacity C4,
C7, coupling electric capacity C1, decoupling capacitor C2, C3, C5, C6, wherein,
The model of power detection chip U1 is AD8362, totally 16 pins, No. 2 pins of chip U1
By electric capacity C4 ground connection, No. 3 pins are by decoupling capacitor C3 ground connection, and No. 4 pins are by coupling electric capacity
C1 meets antenna P1, and No. 6 pins are by decoupling capacitor C2 ground connection, simultaneously by decoupling capacitor C2 and resistance
R1 connects, and wherein resistance R1 is also connected with antenna P1；No. 9 pins are by electric capacity C7 ground connection；No. 11
Pin and No. 12 pins are connected with the input of voltage comparator circuit after being connected；No. 13 pins are in parallel
Decoupling capacitor C5 and C6 ground connection, the most external+5V DC source；No. 14 are connected with No. 15 pins；5
Number pin is vacant；No. 1, No. 7, No. 8, No. 10, No. 16 pin ground connection.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 5, its
Being characterised by, described voltage comparator circuit includes: amplifier U2-A and resistance R3, R4, wherein, puts
The big normal phase input end of device U2-A is connected with No. 11 of power detection chip U1 and No. 12 pins, anti-phase
Input passes through resistance R3 external+5V DC source, simultaneously by resistance R4 ground connection, and amplifier U2-A
Outfan be connected with the input of warning circuit.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 6, its
Being characterised by, described warning circuit includes: NPN type triode Q1, buzzer U3 and resistance R2,
R5, wherein, the base stage of NPN type triode Q1 is by the outfan of resistance R2 and amplifier U2-A even
Connecing, colelctor electrode is connected with the signal input part of buzzer U3, grounded emitter；The power supply of buzzer U3
Input passes through resistance R5 external+5V DC source.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 6, its
Being characterised by, described resistance R3 and R4 is adjustable resistance, and described threshold value is by regulation resistance R3 and R4
Resistance value be set.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 7, its
It is characterised by, also includes dustproof and waterproof shell, described power detection circuit, voltage comparator circuit and warning
Circuit is arranged in described shell, and described shell is provided with and makes described antenna P1 and buzzer U3 lean out institute
State the through hole of shell.
The burglar alarm with Radio Frequency Interfere detection function the most according to claim 1,
It is characterized in that, also include rechargeable battery, described rechargeable battery is used for as described power detection circuit, electricity
Pressure comparison circuit and warning circuit are powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610554595.4A CN106004789B (en) | 2016-07-14 | 2016-07-14 | A kind of burglar alarm with Radio Frequency Interfere detection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610554595.4A CN106004789B (en) | 2016-07-14 | 2016-07-14 | A kind of burglar alarm with Radio Frequency Interfere detection function |
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| CN106004789A true CN106004789A (en) | 2016-10-12 |
| CN106004789B CN106004789B (en) | 2018-07-27 |
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| CN201610554595.4A Active CN106004789B (en) | 2016-07-14 | 2016-07-14 | A kind of burglar alarm with Radio Frequency Interfere detection function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597501A (en) * | 2016-12-13 | 2017-04-26 | 天津代双科技有限公司 | Dynamo-electric-based GPS indoor anti-shielding unmanned plane positioning system |
| CN106961314A (en) * | 2017-02-23 | 2017-07-18 | 珠海德百祺科技有限公司 | Vehicle anti-interference method and vehicle anti-interference system |
| CN108075849A (en) * | 2017-12-28 | 2018-05-25 | 成都市智讯联创科技有限责任公司 | GPS and GSM interference signal direction detecting positioning systems based on detection |
| CN109300290A (en) * | 2018-10-16 | 2019-02-01 | 叶春林 | Meet with information delivery mode when interference |
| CN112019230A (en) * | 2020-09-18 | 2020-12-01 | 中国电子科技集团公司第十四研究所 | Antenna high-power reflection protection system and transceiving assembly |
| CN112838843A (en) * | 2020-12-30 | 2021-05-25 | 北京千方科技股份有限公司 | Signal conditioning device and signal conditioning method |
| CN113917213A (en) * | 2021-09-17 | 2022-01-11 | 威凯检测技术有限公司 | Voltmeter for checking conducted disturbance immunity test system |
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| CN205769174U (en) * | 2016-07-14 | 2016-12-07 | 深圳车伙伴科技有限公司 | A kind of burglar alarm with Radio Frequency Interfere detection function |
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| US20080045175A1 (en) * | 2006-08-18 | 2008-02-21 | Samsung Electronics Co., Ltd. | Ultra wide band device and detect-and-avoid method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597501A (en) * | 2016-12-13 | 2017-04-26 | 天津代双科技有限公司 | Dynamo-electric-based GPS indoor anti-shielding unmanned plane positioning system |
| CN106961314A (en) * | 2017-02-23 | 2017-07-18 | 珠海德百祺科技有限公司 | Vehicle anti-interference method and vehicle anti-interference system |
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| CN108075849A (en) * | 2017-12-28 | 2018-05-25 | 成都市智讯联创科技有限责任公司 | GPS and GSM interference signal direction detecting positioning systems based on detection |
| CN108075849B (en) * | 2017-12-28 | 2024-01-09 | 成都市智讯联创科技有限责任公司 | GPS and GSM interference signal direction-finding positioning system based on detection |
| CN109300290A (en) * | 2018-10-16 | 2019-02-01 | 叶春林 | Meet with information delivery mode when interference |
| CN112019230A (en) * | 2020-09-18 | 2020-12-01 | 中国电子科技集团公司第十四研究所 | Antenna high-power reflection protection system and transceiving assembly |
| CN112838843A (en) * | 2020-12-30 | 2021-05-25 | 北京千方科技股份有限公司 | Signal conditioning device and signal conditioning method |
| CN112838843B (en) * | 2020-12-30 | 2024-02-27 | 北京千方科技股份有限公司 | Signal conditioning device and signal conditioning method |
| CN113917213A (en) * | 2021-09-17 | 2022-01-11 | 威凯检测技术有限公司 | Voltmeter for checking conducted disturbance immunity test system |
| CN113917213B (en) * | 2021-09-17 | 2024-04-12 | 威凯检测技术有限公司 | Voltmeter for checking conduction disturbance immunity test system |
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| CN106004789B (en) | 2018-07-27 |
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