CN204244249U - Mobile phone signal detector - Google Patents
Mobile phone signal detector Download PDFInfo
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- CN204244249U CN204244249U CN201420669547.6U CN201420669547U CN204244249U CN 204244249 U CN204244249 U CN 204244249U CN 201420669547 U CN201420669547 U CN 201420669547U CN 204244249 U CN204244249 U CN 204244249U
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- electric capacity
- operational amplifier
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- mobile phone
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Abstract
The utility model relates to a kind of mobile phone signal detector, and its feature comprises: 12V DC power supply, reception antenna and centimeter wave resonant tank, RF signal voltage comparison circuit, signal power are amplified and display circuit; Described reception antenna and centimeter wave resonant tank are made up of reception antenna ANT, electric capacity C1, electric capacity C2, electric capacity C3, and electric capacity C3 selects round sheet electric capacity, and the cut to lengthen of electric capacity C3 pin leads is at 18mm, and the spacing of two wires controls at 8mm; Described RF signal voltage comparison circuit is made up of operational amplifier IC1, resistance R1, resistance R2 and electrochemical capacitor C4, resistance R3, and the model that operational amplifier IC1 selects is CA3130; Described signal power is amplified and display circuit is made up of NPN transistor VT1, resistance R4 and LED.As long as be in " calling " or " reception " state by the mobile phone detected, some important places can be detected with it.
Description
Technical field
The utility model belongs to radio signal detection techniques field, relates 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 utility model, 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 described in the utility model is involved in implementation process in detail.
Utility model content
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 utility model, 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 embodiment circuit working schematic diagram that the utility model provides.
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 utility model content, 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 utility model, is further described correlation technique of the present utility model 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 utility model 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 utility model, circuit structure design, its shape and size etc. of outward appearance are not all key technologies of the present utility model; because not affecting the utility model specific implementation process; neither the claimed technology contents of the utility model, therefore do 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 amplification and display circuit, it is characterized in that:
Described reception antenna and centimeter wave resonant tank are 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;
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, 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 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 |
|---|---|---|---|
| CN201420669547.6U CN204244249U (en) | 2014-11-10 | 2014-11-10 | Mobile phone signal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669547.6U CN204244249U (en) | 2014-11-10 | 2014-11-10 | Mobile phone signal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244249U true CN204244249U (en) | 2015-04-01 |
Family
ID=52773685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420669547.6U Expired - Fee Related CN204244249U (en) | 2014-11-10 | 2014-11-10 | Mobile phone signal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204244249U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301055A (en) * | 2014-11-10 | 2015-01-21 | 周芸 | Mobile phone signal detector |
-
2014
- 2014-11-10 CN CN201420669547.6U patent/CN204244249U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301055A (en) * | 2014-11-10 | 2015-01-21 | 周芸 | Mobile phone signal detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20151110 |
|
| EXPY | Termination of patent right or utility model |