CN104301055A - Mobile phone signal detector - Google Patents
Mobile phone signal detector Download PDFInfo
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- CN104301055A CN104301055A CN201410632805.8A CN201410632805A CN104301055A CN 104301055 A CN104301055 A CN 104301055A CN 201410632805 A CN201410632805 A CN 201410632805A CN 104301055 A CN104301055 A CN 104301055A
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Abstract
The invention relates to a mobile phone signal detector. The mobile phone signal detector is characterized by comprising a 12V direct current power supply, a receiving antenna and centimeter wave resonance circuit, a radio-frequency signal voltage comparison circuit and a signal power amplifying and displaying circuit, wherein the receiving antenna and centimeter wave resonance circuit consists of a receiving antenna ANT, a capacitor C1, a capacitor C2 and a capacitor C3, a round flaky capacitor is used as the capacitor C3, the length of a pin wire of the capacitor C3 is controlled at 18 mm, and the distance between two wires is controlled at 8 mm; the radio-frequency signal voltage comparison circuit consists of an operational amplifier IC1, a resistor R1, a resistor R2, an electrolysis capacitor C4 and a resistor R3, and the model of the selected operational amplifier IC1 is CA3130; the signal power amplifying and displaying circuit consists of an NPN (Negative-Positive-Negative) type transistor VT1, a resistor R4 and a light emitting diode LED. As long as a detected mobile phone is in a calling or receiving state, some important occasions can be detected by the mobile phone.
Description
Technical field
The invention belongs to radio signal detection techniques field, relate to a kind of mobile phone signal detector.
Background technology
Mobile phone signal detector can detect the mobile phone particular location worked, and general radio frequency (RF) wave detector is commonly used LC oscillator and completed detection function, but this detecting way is not suitable for superhigh frequency band (GHz) mobile phone.The working frequency range of mobile phone is 3.3 ~ 10cm at 0.9 ~ 3GHz, wavelength, detection range >=1.5 meter of the present invention, as long as be in " calling " or " reception " state by the mobile phone detected, some important places can be detected with it, as: examination hall middle school student carry or use mobile phone in violation of rules and regulations, and this detector can detect the existence of mobile phone within the specific limits.This mobile phone signal detector can be used for prison, army or concerning security matters department, and for fields such as earthquake searching rescues, detects standby mobile phone, and can find out the position of its mobile phone exactly.
Below describe necessity, the critical technology contents that mobile phone signal detector of the present invention is involved in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: mobile phone signal detector can detect the mobile phone particular location worked, general radio frequency (RF) wave detector is commonly used LC oscillator and is completed detection function, but this detecting way is not suitable for superhigh frequency band (GHz) mobile phone.The working frequency range of mobile phone is 3.3 ~ 10cm at 0.9 ~ 3GHz, wavelength, detection range >=1.5 meter of the present invention, as long as be in " calling " or " reception " state by the mobile phone detected, some important places can be detected with it, as: examination hall middle school student carry or use mobile phone in violation of rules and regulations, and this detector can detect the existence of mobile phone within the specific limits.This mobile phone signal detector can be used for prison, army or concerning security matters department, and for fields such as earthquake searching rescues, detects standby mobile phone, and can find out its position exactly.
Circuit working principle: employ electric capacity C3 in mobile phone signal detector circuit, this electric capacity is a kind of round sheet electric capacity, catches mobile phone radio frequency (RF) signal with it.The cut to lengthen of electric capacity C3 pin leads at 18mm, the spacing of two wires controls at 8mm, and electric capacity C3 forms centimeter wave loop aerial jointly with described wire, and it is for radio frequency (RF) signal of resonance mobile phone.
The in-phase end of the operational amplifier IC1 (CA3130) in circuit be connected electric capacity C3 between end of oppisite phase, jointly complete the voltage transformation of radio frequency (RF) signal.Operational amplifier IC1 is a kind of COMSP raceway groove amplifier, has very high input impedance, extremely low input current and high-speed computation performance, and it is well suited for micro-signal input and the maximum of its output voltage reaches 10mV.
When by detect operating handset (comprising: receive or breathe out) time, electric capacity C3 and aforesaid micro loop antenna can obtain the signal of mobile phone, on electric capacity C3, now form electric field and storage of electrical energy, this electric field forms electric current at the input of operational amplifier IC1, and this input current is converted to corresponding voltage by operational amplifier IC1.
The resistance R1 that operational amplifier IC1 in-phase end is external and resistance R2 is biasing circuit, and to ensure that operational amplifier IC1 normally works, resistance R2 is also for electrochemical capacitor C4 provides discharge path simultaneously.Between operational amplifier IC1 end of oppisite phase the 2nd pin and output the 6th pin, cross-over connection resistance R3 is as negative feedback, and its object makes circuit working state more stable.
Once electric capacity C3 resonance to mobile phone signal, operational amplifier IC1 output will change with input signal height, this signal is added to NPN transistor VT1 base stage and carries out power amplification, NPN transistor VT1 is in and is interrupted on-off switch state, thus LED is glimmered.
Accompanying drawing explanation
Accompanying drawing 1 is mobile phone signal detector provided by the invention embodiment circuit working schematic diagram.
Embodiment
According to the mobile phone signal detector circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in execution mode requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
Technical scheme: mobile phone signal detector, it comprises 12V DC power supply, reception antenna and centimeter wave resonant tank, RF signal voltage comparison circuit, signal power amplification and display circuit, it is characterized in that:
Reception antenna and centimeter wave resonant tank: it is made up of reception antenna ANT, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C3 selects round sheet electric capacity, the cut to lengthen of electric capacity C3 pin leads is at 18mm, the spacing of two wires controls at 8mm, reception antenna ANT connects electric capacity C1 one end, operational amplifier IC1 the 2nd pin connects the electric capacity C1 other end and electric capacity C2 one end and electric capacity C3 one end, electric capacity C2 other end connection circuit ground another termination operational amplifier of GND, electric capacity C3 IC1 the 3rd pin;
RF signal voltage comparison circuit: it is made up of operational amplifier IC1, resistance R1, resistance R2 and electrochemical capacitor C4, resistance R3, the model that operational amplifier IC1 selects is CA3130, operational amplifier IC1 the 7th pin connection circuit positive pole VCC, operational amplifier IC1 the 4th pin connection circuit ground GND, operational amplifier IC1 the 2nd pin connect operational amplifier IC1 the 6th pin by resistance R3;
Signal power is amplified and display circuit: it is made up of NPN transistor VT1, resistance R4 and LED, operational amplifier IC1 the 6th pin connects NPN transistor VT1 base stage, NPN transistor VT1 collector electrode is by resistance R4 connection circuit positive pole VCC, NPN transistor VT1 emitter connects LED positive pole, LED negative pole connection circuit ground GND;
The positive pole connection circuit positive pole VCC of 12V DC power supply, the negative pole connection circuit ground GND of 12V DC power supply.
The technical parameter of components and parts and selection requirement thereof
| Element number | Components and parts title | Technical indicator or model | Quantity | Remarks |
| IC1 | Operational amplifier | CA3130, DIP specification | 1 | Direct insertion 8 pins |
| VT1 | NPN transistor | 2SC9013 | 1 | ? |
| R1 | Metalfilmresistor | 2.2MΩ、1/8W | 1 | ? |
| R2 | Metalfilmresistor | 100KΩ、1/8W | 1 | ? |
| R3 | Metalfilmresistor | 2.2MΩ、1/8W | 1 | ? |
| R4 | Metalfilmresistor | 910Ω、1/8W | 1 | ? |
| C1 | Electric capacity | 22PF | 1 | Sheet, vertical |
| C2 | Electric capacity | 22PF | 1 | Sheet, vertical |
| C3 | Electric capacity | 0.22PF | 1 | Round sheet, vertical |
| C4 | Electrochemical capacitor | 100μF/16V | 1 | Vertical |
| LED | Light-emitting diode | Diameter ￠ 5 | 1 | Red |
| DC | 12V DC power supply | 6V laminated cell two series connection | 2 | ? |
Circuit production main points, circuit debugging and using method
Because the circuit structure of mobile phone signal detector is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present invention does not substantially need to carry out debugging and can normally work;
When circuit production, an available fritter epoxy resin one side copper foil plate, in order to mounting related components, wherein the wire length (18mm, spacing 8mm) of electric capacity C3 should be taken by above-mentioned requirements, and should stop corresponding space, so that the fine tuning when Received signal strength;
Circuit components layout of the present invention, circuit structure design, its shape and size etc. of outward appearance are not all key technologies of the present invention; because not affecting specific implementation process of the present invention; neither the technology contents of application claims protection, therefore not illustrate one by one in the description.
Claims (1)
1. a mobile phone signal detector, it comprises 12V DC power supply, reception antenna and centimeter wave resonant tank, RF signal voltage comparison circuit, signal power is amplified and display circuit, it is characterized in that: described reception antenna and centimeter wave resonant tank are by reception antenna ANT, electric capacity C1, electric capacity C2, electric capacity C3 forms, electric capacity C3 selects round sheet electric capacity, the cut to lengthen of electric capacity C3 pin leads is at 18mm, the spacing of two wires controls at 8mm, reception antenna ANT connects electric capacity C1 one end, operational amplifier IC1 the 2nd pin connects the electric capacity C1 other end and electric capacity C2 one end and electric capacity C3 one end, electric capacity C2 other end connection circuit ground GND, another termination operational amplifier of electric capacity C3 IC1 the 3rd pin,
Described RF signal voltage comparison circuit is made up of operational amplifier IC1, resistance R1, resistance R2 and electrochemical capacitor C4, resistance R3, the model that operational amplifier IC1 selects is CA3130, operational amplifier IC1 the 7th pin connection circuit positive pole VCC, operational amplifier IC1 the 4th pin connection circuit ground GND, operational amplifier IC1 the 2nd pin connect operational amplifier IC1 the 6th pin by resistance R3;
Described signal power is amplified and display circuit is made up of NPN transistor VT1, resistance R4 and LED, operational amplifier IC1 the 6th pin connects NPN transistor VT1 base stage, pole described in NPN transistor VT1 current collection is by resistance R4 connection circuit positive pole VCC, NPN transistor VT1 emitter connects LED positive pole, LED negative pole connection circuit ground GND;
The positive pole connection circuit positive pole VCC of described 12V DC power supply, the negative pole connection circuit ground GND of 12V DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410632805.8A CN104301055A (en) | 2014-11-10 | 2014-11-10 | Mobile phone signal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410632805.8A CN104301055A (en) | 2014-11-10 | 2014-11-10 | Mobile phone signal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104301055A true CN104301055A (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410632805.8A Pending CN104301055A (en) | 2014-11-10 | 2014-11-10 | Mobile phone signal detector |
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| Country | Link |
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| CN (1) | CN104301055A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138471A (en) * | 2019-05-22 | 2019-08-16 | 中控智慧科技股份有限公司 | A kind of detection method and relevant apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05219193A (en) * | 1992-02-04 | 1993-08-27 | Funai Electric Co Ltd | Ringer detecting circuit |
| CN102956087A (en) * | 2012-10-20 | 2013-03-06 | 中国石油化工股份有限公司 | Fire-proof and explosion-proof safety prompting device |
| CN204244249U (en) * | 2014-11-10 | 2015-04-01 | 周芸 | Mobile phone signal detector |
-
2014
- 2014-11-10 CN CN201410632805.8A patent/CN104301055A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05219193A (en) * | 1992-02-04 | 1993-08-27 | Funai Electric Co Ltd | Ringer detecting circuit |
| CN102956087A (en) * | 2012-10-20 | 2013-03-06 | 中国石油化工股份有限公司 | Fire-proof and explosion-proof safety prompting device |
| CN204244249U (en) * | 2014-11-10 | 2015-04-01 | 周芸 | Mobile phone signal detector |
Non-Patent Citations (1)
| Title |
|---|
| 华强电子网: "《移动信号传输检波器》", 《HTTP://WWW.HQEW.COM/TECH/FANGAN/1174576.HTML》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138471A (en) * | 2019-05-22 | 2019-08-16 | 中控智慧科技股份有限公司 | A kind of detection method and relevant apparatus |
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Application publication date: 20150121 |