CN205982666U - Cell -phone detecting door system - Google Patents
Cell -phone detecting door system Download PDFInfo
- Publication number
- CN205982666U CN205982666U CN201620570185.4U CN201620570185U CN205982666U CN 205982666 U CN205982666 U CN 205982666U CN 201620570185 U CN201620570185 U CN 201620570185U CN 205982666 U CN205982666 U CN 205982666U
- Authority
- CN
- China
- Prior art keywords
- signal
- converter
- mobile phone
- door system
- industrial computer
- 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.)
- Active
Links
Landscapes
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The utility model discloses a cell -phone detecting door system, include: the industry control computer, analog -to -digital conversion module, signal processing module surveys the module, wherein, the industry control computer sends data signal to the DA converter, the DA converter converts data signal into an analog signal, power amplifier unit is with an analog signal's power amplification, the analog signal of emission unit after with power amplification launches by detection area, receiving element receives by the 2nd analog signal of detection area reflection, voltage follower resists the processing of crosstalking to the 2nd analog signal, the low noise amplifying unit improves through anti SNR of crosstalking the 2nd analog signal after handling, the 2nd analog signal transition after the AD converter improves the SNR is data signal, it reads to reach the industry control computer. The utility model discloses simple structure, portable, strong, the detection precision height of interference killing feature.
Description
Technical field
This utility model is related to mobile phone Detection Techniques field, and more particularly, to a kind of mobile phone detects door system.
Background technology
In recent years, safety and privacy concerns are subjected to great challenge, and increasing secrecy place and closing are empty
Between need to mobile phone etc. carry communication sound-recording function equipment detect.Existing mobile phone etc. communicates the detection master of sound pick-up outfit
There is active and two kinds of passive type, active detection door adopts the principle of metal detection, that is, by the search coil of detection door
Changes of magnetic field whether determine whether that metal object is passed through；Passive detection door adopts fluxgate sensor technology, coordinates software
Intelligent algorithm is calculated.But, the signal processing circuit of existing mobile phone detection door mainly adopts analog component, makes multiple
Miscellaneous, high cost is it is difficult to miniaturization leads to Portability poor, and poor anti jamming capability, and detection accuracy is low to be visited it is impossible to meet mobile phone
Survey applied environment and the market demand of door.
Utility model content
Main purpose of the present utility model is that providing a kind of mobile phone to detect door system detects it is intended to solve existing mobile phone
Door detection accuracy is low, poor anti jamming capability and problem inconvenient to carry.
For achieving the above object, the utility model proposes a kind of mobile phone detects door system, including：
Industrial computer, the data interaction for each module of this system and process；
Analog-to-digital conversion module, connects described industrial computer, including D/A converter and AD converter；
Signal processing module, connects described analog-to-digital conversion module, including power amplification unit, voltage follower and LNA
Big unit；
Detecting module, connects described signal processing module, including transmitter unit and receiving unit；
Wherein, described industrial computer sends digital signal to described D/A converter；
Described digital signal is converted to the first analogue signal by described D/A converter；
Described power amplification unit is by the power amplification of described first analogue signal；
The first analogue signal after power amplification is transmitted into detected region by described transmitter unit；
Described receiving unit receives the second analogue signal of detected region reflection；
Described voltage follower carries out resistance to crosstalk process to described second analogue signal；
Described low noise amplifying unit improves the signal to noise ratio of the second analogue signal after processing through resistance to crosstalk；
The second analogue signal processing through low frequency suppression is converted to digital signal by described AD converter, and reaches industry control
Computer is read out.
Further, described signal processing module also includes filter unit, after described filter unit is to signal to noise ratio raising
Second analogue signal carries out low frequency suppression process.
Further, this mobile phone detects door system and also includes：
Display module, connects described industrial computer, for showing the result of detection that described industrial computer reads.
Further, this mobile phone detects door system and also includes：
Alarm module, connects described industrial computer, sends alarm when detecting contraband.
Further, described D/A converter and AD converter connect described industrial computer by DIO interface.
Further, it is provided with analog switch between described receiving unit and described voltage follower, described analog switch
Timesharing switching is carried out to multichannel second analogue signal so that any instant only have road second analogue signal enter described voltage with
With device.
Further, the frequency range of the first analogue signal that described D/A converter is changed is 15KHz-20KHz.
Mobile phone of the present utility model detects door system, is changed, by D/A converter, the digital signal that industrial computer sends
For the first analogue signal, after amplifying through power amplification unit, detected region is transmitted in by transmitter unit, then by receiving
Unit receives the second analogue signal of detected region reflection, after the resistance to crosstalk, low noise processing and amplifying of signal processing module,
Digital signal is converted into by AD converter, is finally read out by computer.This utility model structure is simple, be easy to take
Band, strong antijamming capability, detection accuracy are high, disclosure satisfy that applied environment and the market demand of mobile phone detection door.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 detects the high-level schematic functional block diagram of door system one embodiment for this utility model mobile phone.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 10 | Industrial computer | 33 | Low noise amplifying unit |
| 20 | Analog-to-digital conversion module | 34 | Filter unit |
| 21 | D/A converter | 40 | Detecting module |
| 22 | AD converter | 41 | Transmitter unit |
| 30 | Signal processing module | 42 | Receiving unit |
| 31 | Power amplification unit | 50 | Display module |
| 32 | Voltage follower | 60 | Alarm module |
The realization of this utility model purpose, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe it is clear that described embodiment is only a part of embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not paying creative work premise
Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in this utility model embodiment
It is only used for explaining the relative position relation between each part, motion conditions etc. under a certain particular pose (as shown in drawings), such as
When really this particular pose changes, then directionality instruction also correspondingly changes therewith.
In addition, the description being related to " first ", " second " etc. in this utility model is only used for describing purpose, and it is not understood that
For indicating or implying its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ",
The feature of " second " can be expressed or implicitly include at least one this feature.In addition, the technical side between each embodiment
Case can be combined with each other, but must be capable of by those of ordinary skill in the art based on, when the combination of technical scheme
Will be understood that the combination of this technical scheme does not exist when appearance is conflicting or cannot realize, also do not require in this utility model
Protection domain within.
With reference to Fig. 1, Fig. 1 detects the high-level schematic functional block diagram of door system one embodiment for this utility model mobile phone, real at this
Apply in example, this mobile phone detects door system and includes：
Industrial computer 10, the data interaction for each module of this system and process；
Analog-to-digital conversion module 20, connects industrial computer 10, including D/A converter 21 and AD converter 22；
Signal processing module 30, connects analog-to-digital conversion module 20, including power amplification unit 31, voltage follower 32 and low
Make an uproar amplifying unit 33；
Detecting module 40, connects signal processing module 30, including transmitter unit 41 and receiving unit 42；
Wherein, industrial computer 10 sends digital signal to D/A converter 21；
Described digital signal is converted to the first analogue signal by D/A converter 22；
Power amplification unit 31 is by the power amplification of described first analogue signal；
The first analogue signal after power amplification is transmitted into detected region by transmitter unit 41；
Receiving unit 42 receives the second analogue signal of detected region reflection；
Voltage follower 32 carries out resistance to crosstalk process to described second analogue signal；
Low noise amplifying unit 33 improves the signal to noise ratio of the second analogue signal after processing through resistance to crosstalk；
The second analogue signal after signal to noise ratio is improved by AD converter 22 is converted to digital signal, and reaches industrial computer
10 are read out.
The mobile phone of the present embodiment detects door system, including：Industrial computer 10, for the data interaction of each module of this system
And process；Analog-to-digital conversion module 20, connects industrial computer 10, including D/A converter 21 and AD converter 22；Signal processing mould
Block 30, connects analog-to-digital conversion module 20, including power amplification unit 31, voltage follower 32 and low noise amplifying unit 33；Detect
Module 40, connects signal processing module 30, including transmitter unit 41 and receiving unit 42.
Industrial computer 10 is a kind of LCD ultra-thin tablet computer, has touch function, flexible for installation, is not subject to magnetic interference
Characteristic, industrial computer 10 adopts almag panel, has multiple PCI/ISA and have no chance base plate, can match total length/half long
CPU card or ATX mainboard, have MSF multi-scan function simultaneously, support many kinds of resolution of SXGA, XGA, SVGA, VGA.
D/A converter 21 is used for producing the first analogue signal, and the first analogue signal is sine wave, square wave or triangular wave, adopts
Power PC I simulated-bus amount output card, each analog output channel carries the double buffering DAC of 12, has
The maximum number renewal rate of 5Mhz, flexible input type and range set；AD converter 22 be used for by real-time obtain the
Two analogue signals are converted to the digital signal that industrial computer 10 can identify reading, and reach at industrial computer 10
Reason, AD converter 22 adopts a high-performance data capture card based on 32 pci bus architectures, and the maximum with 10MHz is adopted
Sample speed is so as to get the A/D sampling of industrial computer 10 internal memory is continuous, uninterrupted.
Power amplification unit 31 adopts that switching rate is high, distortion is little, output power TDA2030A integrated power amplifies
Device, makes the output amplitude of the first analogue signal sufficiently large, it is to avoid the new harmonic component that power amplifier brings；Voltage follower 32 adopts
The TL084 voltage follower of high-conversion rate, low input biasing and Low-bias Current, it is to avoid the second analogue signal of reception mutually it
Between crosstalk；Low noise amplifying unit 33 adopts the AD8572 low noise operational of low maladjustment voltage, Low Drift Temperature, high common mode inhibition to amplify
Device, realizes the low noise amplification of the second analogue signal, improves low noise ratio, is conducive to AD converter 22 to carry out analog-to-digital conversion process.
Transmitter unit 41 is the transmitting coil of two differential connections, and receiving unit 42 is a receiving coil, two transmittings
The magnetic field that the magnetic field that coil produces is produced with receiving coil maintains the detected region of a relative equilibrium, is now detected region
Interior generation mutual induction electromotive force equal in magnitude, in opposite direction, cancels out each other；When having mobile phone or other communication apparatus pass through, quilt
Galvanomagnetic-effect and eddy current effect can be produced in the alternating field of detection zone, and then break original magnetic field balance, output amplitude is sent out
Second analogue signal of changing.
The mobile phone of the present embodiment detects door system, sends digital signal from industrial computer 10 to D/A converter 21 first,
D/A converter 21 converts digital signals into the first analogue signal, then by power amplification unit 31 by the work(of the first analogue signal
Rate is amplified, and the first analogue signal after power amplification is transmitted into detected region by transmitter unit 41, and receiving unit 42 receives quilt
Second analogue signal of detection zone reflection, subsequently carries out resistance to crosstalk process by voltage follower 32 to the second analogue signal,
Low noise amplifying unit 33 improves the signal to noise ratio of the second analogue signal after resistance to crosstalk is processed, and is finally put forward signal to noise ratio by AD converter
The second analogue signal after height is converted to digital signal, reaches industrial computer 10 and is read out, realizes the communication apparatus such as mobile phone
Detection.
This utility model structure is simple, be easy to carry, strong antijamming capability, detection accuracy are high, disclosure satisfy that mobile phone detects
The applied environment of door and the market demand.
Further, with reference to Fig. 1, signal processing module 30 also includes filter unit 34, and filter unit 34 carries to signal to noise ratio
The second analogue signal after height carries out low frequency suppression process.
The mobile phone of the present embodiment detects door system, and signal processing module 30 also includes filter unit 34, and filter unit 34 is adopted
With noise is lower, dynamic characteristic more preferable MAX275 active filter chip, realize low frequency suppression and process so that filter unit 34
The second analogue signal after filtration all assumes high frequency state, is conducive to improving the accuracy that mobile phone detects door system.
Further, with reference to Fig. 1, this mobile phone detects door system and also includes：
Display module 50, connects industrial computer 10, for showing the result of detection that industrial computer 10 reads.
The mobile phone of the present embodiment detects door system, also includes connecting the display module 50 of industrial computer 10, so that by work
The result of detection that control computer 10 reads shows, display module 50 is the LCD display of industrial computer 10, can be used for many
Plant the display of image model, be favorably improved the detection efficient of mobile phone detection door.
Further, with reference to Fig. 1, this mobile phone detects door system and also includes：
Alarm module 60, connects industrial computer 10, sends alarm when detecting contraband.
The mobile phone of the present embodiment detects door system, the good alarm module 60 including connection industrial computer 10, and mobile phone detects
Door system can set to the type of violated product before devoting oneself to work, when the article detecting meet and set type,
Alarm module 60 can send alarm and reminding security staff, is conducive to the safety of protected area.
Further, with reference to Fig. 1, D/A converter 21 and AD converter 22 connect industrial computer 10 by DIO interface.
The mobile phone of the present embodiment detects door system, and D/A converter 21 and AD converter 22 pass through internal DIO interface and connect
Industrial computer 10, can reduce the energy loss in signal transduction process, and the interference of other signals outside.
Further, with reference to Fig. 1, between receiving unit 42 and voltage follower 32, it is provided with analog switch, analog switch
Timesharing switching is carried out to multichannel second analogue signal so that any instant only has road second analogue signal to enter voltage follower
32.
The mobile phone of the present embodiment detects door system, in order to obtain the positional information in detected region for the detected target and report
Alert accuracy, needs industrial computer 10 each road second analogue signal to be processed, therefore in receiving unit 42 and electricity
Multichannel second analogue signal that between pressure follower 32, setting analog switch receives to receiving unit 42 carries out timesharing switching,
The a certain moment only selects wherein one tunnel the second analogue signal and is processed, at this road signal so as to enter voltage follower 32
Manage after finishing, then next road is switched to by analog switch and processed it is ensured that an any instant only tunnel the second analogue signal is entered
Enter voltage follower 32, and then ensure that industrial computer 10 is processed to each road second analogue signal.Using analog switch
Decrease the uses covering signal processing system more, reduce cost, and debug conveniently.
Further, with reference to Fig. 1, the frequency range of the first analogue signal that D/A converter 21 is changed is 15KHz-20KHz.
The mobile phone of the present embodiment detects door system, and the frequency range of the first analogue signal of D/A converter 21 conversion is
15KHz-20KHz, disclosure satisfy that frequency and the more stable requirement of amplitude, and power consumption is relatively low.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every equivalent structure change under inventive concept of the present utility model, made using this utility model description and accompanying drawing content
Change, or directly/be indirectly used in other related technical fields and be included in scope of patent protection of the present utility model.
Claims (7)
1. a kind of mobile phone detects door system it is characterised in that including：
Industrial computer, the data interaction for each module of this system and process；
Analog-to-digital conversion module, connects described industrial computer, including D/A converter and AD converter；
Signal processing module, connects described analog-to-digital conversion module, amplifies single including power amplification unit, voltage follower and low noise
Unit；
Detecting module, connects described signal processing module, including transmitter unit and receiving unit；
Wherein, described industrial computer sends digital signal to described D/A converter；
Described digital signal is converted to the first analogue signal by described D/A converter；
Described power amplification unit is by the power amplification of described first analogue signal；
The first analogue signal after power amplification is transmitted into detected region by described transmitter unit；
Described receiving unit receives the second analogue signal of detected region reflection；
Described voltage follower carries out resistance to crosstalk process to described second analogue signal；
Described low noise amplifying unit improves the signal to noise ratio of the second analogue signal after processing through resistance to crosstalk；
The second analogue signal after signal to noise ratio is improved by described AD converter is converted to digital signal, and reaches industrial computer and enter
Row reads.
2. mobile phone according to claim 1 detects door system it is characterised in that described signal processing module also includes filtering
Unit, described filter unit carries out low frequency suppression process to the second analogue signal after signal to noise ratio raising.
3. mobile phone according to claim 1 detects door system it is characterised in that this mobile phone detection door system also includes：
Display module, connects described industrial computer, for showing the result of detection that described industrial computer reads.
4. mobile phone according to claim 1 detects door system it is characterised in that this mobile phone detection door system also includes：
Alarm module, connects described industrial computer, sends alarm when detecting contraband.
5. mobile phone according to claim 1 detects door system it is characterised in that described D/A converter and AD converter pass through
DIO interface connects described industrial computer.
6. mobile phone according to claim 1 detects door system it is characterised in that described receiving unit and described voltage follow
It is provided with analog switch, described analog switch carries out timesharing switching to multichannel second analogue signal so that any instant between device
Only one tunnel the second analogue signal enters described voltage follower.
7. mobile phone according to claim 1 detects door system it is characterised in that the first simulation of described D/A converter conversion
The frequency range of signal is 15KHz-20KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570185.4U CN205982666U (en) | 2016-06-14 | 2016-06-14 | Cell -phone detecting door system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570185.4U CN205982666U (en) | 2016-06-14 | 2016-06-14 | Cell -phone detecting door system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205982666U true CN205982666U (en) | 2017-02-22 |
Family
ID=58020702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620570185.4U Active CN205982666U (en) | 2016-06-14 | 2016-06-14 | Cell -phone detecting door system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205982666U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109157207A (en) * | 2018-08-23 | 2019-01-08 | 深圳北芯生命科技有限公司 | Cross-interference elimination device and method based on FFR measurement |
| CN110969737A (en) * | 2019-12-23 | 2020-04-07 | 青海海西东诺化工有限公司 | Access control system for explosive production workshop |
-
2016
- 2016-06-14 CN CN201620570185.4U patent/CN205982666U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109157207A (en) * | 2018-08-23 | 2019-01-08 | 深圳北芯生命科技有限公司 | Cross-interference elimination device and method based on FFR measurement |
| CN110969737A (en) * | 2019-12-23 | 2020-04-07 | 青海海西东诺化工有限公司 | Access control system for explosive production workshop |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103019438B (en) | For the force transducer interface of touch controller | |
| CN100468291C (en) | Display system, interrelated electric equipment and method of displaying image data | |
| US9134824B2 (en) | Touch sensing device and double sampling method thereof | |
| RU2011153426A (en) | INTERFACE SUSPENSIBLE TO TOUCH OR NEARBY | |
| JP4154342B2 (en) | Wireless powerless handwriting device for computer input | |
| CN204480336U (en) | Multi-functional work attendance roll-call all-in-one and attendance checking system | |
| CN105511667A (en) | Back touch control mobile terminal and method based on back pressure transducer | |
| CN103593099A (en) | Input system and method for detecting touch using the same | |
| CN104750330A (en) | Touch sensing system | |
| CN103135840A (en) | Touch screen sensing device and method for sensing touch screen | |
| CN205982666U (en) | Cell -phone detecting door system | |
| CN101901096A (en) | User interface apparatus and method for an electronic device touchscreen | |
| US20210200296A1 (en) | Capacitance detection circuit, touch control chip and electronic device | |
| CN101452353A (en) | Touch screen input detecting method and touch screen equipment | |
| WO2021147007A1 (en) | Capacitance detection circuit, touch-control chip, and electronic device | |
| TW200712913A (en) | Multi-mode foldable electronic apparatus and method thereof | |
| CN206147550U (en) | Active electric capacity screen forced induction touch -control pen | |
| CN210377399U (en) | State detection device of touch control pen and terminal equipment | |
| CN205607928U (en) | Acoustic emission vibration detection device based on piezoceramics piece | |
| CN204666159U (en) | A kind of navigational system based on dsp processor | |
| CN203116846U (en) | An environmental noise monitoring system | |
| CN105786222A (en) | Ultrasonic induction writing method and system, intelligent terminal and writing end | |
| CN101923760A (en) | Minitype precious exhibit monitor | |
| CN202995861U (en) | Active-passive infrared passenger flow counting device | |
| CN203811817U (en) | Concealed earphone detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |