CN106872826B - Safety detection circuit for intelligent wireless communication module - Google Patents
Safety detection circuit for intelligent wireless communication module Download PDFInfo
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- CN106872826B CN106872826B CN201710121341.8A CN201710121341A CN106872826B CN 106872826 B CN106872826 B CN 106872826B CN 201710121341 A CN201710121341 A CN 201710121341A CN 106872826 B CN106872826 B CN 106872826B
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- safety detection
- detection signal
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- wireless communication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/252—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Alarm Systems (AREA)
Abstract
Safety detection circuit disclosed by the invention for intelligent wireless communication module, is set up using digital analog converter, voltage conversion circuit and analog-digital converter.Main system controls digital analog converter and detects signal using voltage change mode output safety；Voltage conversion circuit inputs safety detection signal, and exports converted safety detection signal；Analog-digital converter inputs converted safety detection signal, and formation testing result output signal is sent to main system and detects whether the testing result output signal is mutually matched with safety detection signal after processing.The present invention is the safety detection circuit that intelligent wireless communication module increases hardware aspect compared with the prior art, improves safety in utilization, the reliability of intelligent wireless communication module, can be widely used in finance device convenient for intelligent wireless communication module.
Description
Technical field
The present invention relates to the safety monitoring technologies of wireless communication field, and in particular to one kind is used for intelligent wireless communication module
Safety detection circuit.
Background technique
4G intelligent wireless communication module can directly run various application systems, such as Android system；It can support LTE-
(wideband code division is more by/WCDMA by FDD (Long Term Evolution-frequency division duplex)/LTE-TDD (Long Term Evolution-time division duplex)
Location)/TD-SCDMA (TD SDMA)/EVDO (Evolution Data Only)/CDMA (CDMA)/GSM
Multiple types such as (global system for mobile communications) support WiFi 802.11b/g/n, the wireless near field communications skill such as BT4.1LE
Art supports GPS/GLONASS (Global Satellite Navigation System)/Beidou multiple types satellite positioning；Support multiple voice and audio
Codec is internally integrated high performance graphics engine, can be with smooth playing 720P video；It is defeated to possess multiple audios, video input
Outgoing interface and GPIO abundant (universal input/output) interface.For a user, many ppus can be eliminated, are stored
Device and some peripheral hardwares related to this, such as GPS module, WIFI module, bluetooth module, LCM (liquid crystal display display module) drive
Dynamic chip, webcam driver chip, charging management chip etc..The intelligent object can substitute the hard of traditional AP+modem mode
Part design method.Therefore, this kind of intelligent object can be used for wireless POS machine；However it is not wireless to being used in the prior art
This kind of intelligent object in POS (Point Of Sale, point-of-sale terminal) machine carries out relevant safeguard protection design.
Summary of the invention
It is an object of the invention to ask for the safety monitoring etc. for solving intelligent wireless communication module in the prior art
The case where topic, occurs；A kind of safety detection circuit for intelligent wireless communication module is provided.
In order to achieve the above object, the invention is realized by the following technical scheme:
A kind of safety detection circuit for intelligent wireless communication module sets principal series in the intelligent wireless communication module
System, the safety detection circuit includes:
Digital analog converter, the main system control the digital analog converter using voltage change mode output safety detection letter
Number；
Voltage conversion circuit inputs the safety detection signal, and exports converted safety detection signal；
Analog-digital converter inputs the converted safety detection signal, forms testing result output signal after processing
It is sent to the main system and detects whether the testing result output signal is mutually matched with the safety detection signal.
Preferably, the voltage conversion circuit is bleeder circuit.
Preferably, the voltage conversion circuit includes:
One end of first impedance, first impedance is electrically connected with the digital analog converter, inputs the safety detection letter
Number；The other end of first impedance exports the converted safety detection signal, and is electrically connected with the analog-digital converter；
Second impedance, one end of second impedance are electrically connected with the other end of first impedance, second impedance
The other end ground connection.
Preferably, described use voltage change mode output safety detection signal for using voltage bounce variation pattern output
Safety detection signal, specifically includes:
The main system controls the digital analog converter and exports different electricity in equal time distances or not constant duration
Pressure value.
Preferably, described use voltage change mode output safety detection signal for using variation in voltage mode output safety
Signal is detected, is specifically included:
The main system controls the digital analog converter in equal time distances or not constant duration output voltage amplitude
Different predetermined waveforms.
Preferably, described use voltage change mode output safety detection signal for the voltage change side with setpoint frequency
Formula output safety detects signal, specifically includes:
The main system controls the waveform that the digital analog converter changes according to the setpoint frequency output voltage amplitude.
Preferably, the main system judges whether the safety detection signal matches with the testing result output signal；
Upon a match, the intelligent wireless communication module is allowed to operate normally.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
Safety detection circuit disclosed by the invention for intelligent wireless communication module is turned using digital analog converter, voltage
It changes circuit and analog-digital converter is set up.Main system is controlled digital analog converter and is detected using voltage change mode output safety
Signal；Voltage conversion circuit inputs safety detection signal, and exports converted safety detection signal；Analog-digital converter, input
Converted safety detection signal forms testing result output signal after processing and is sent to main system to detect the testing result defeated
Whether signal is mutually matched with safety detection signal out.The present invention is that intelligent wireless communication module increases compared with the prior art
The safety detection circuit of hardware aspect improves safety in utilization, the reliability of intelligent wireless communication module, is convenient for intelligent radio
Communication module can be widely used in finance device.
Detailed description of the invention
Fig. 1 is overall structure diagram of the present invention for the safety detection circuit of intelligent wireless communication module.
Fig. 2 is voltage conversion circuit figure of the present invention for the safety detection circuit of intelligent wireless communication module.
Fig. 3 is embodiment schematic diagram one of of the present invention for the safety detection circuit of intelligent wireless communication module.
Fig. 4 is the two of the embodiment schematic diagram for the safety detection circuit that the present invention is used for intelligent wireless communication module.
Fig. 5 is the three of the embodiment schematic diagram for the safety detection circuit that the present invention is used for intelligent wireless communication module.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of safety detection circuit for intelligent wireless communication module, set in intelligent wireless communication module
Main system 4, safety detection circuit include sequentially connected: digital analog converter 1, voltage conversion circuit 2 and analog-digital converter 3.
In the present embodiment, main system 4 controls digital analog converter 1 and detects signal using voltage change mode output safety；Electricity
Voltage conversion circuit 2 inputs safety detection signal, and exports converted safety detection signal；Analog-digital converter 3 inputs converted
Safety detection signal, after processing formed testing result output signal be sent to main system 4 detect the testing result output letter
Number whether it is mutually matched with safety detection signal.
In the present embodiment, main system 4 controls digital analog converter 1 and detects signal using voltage beating pattern output safety；Through
After voltage conversion circuit 2, the processing of analog-digital converter 3, relevant testing result output signal is exported.As shown in figure 3, digital-to-analogue conversion
It is defeated to export relevant testing result after voltage conversion circuit 2, the processing of analog-digital converter 3 for the voltage jitter that device 1 exports
Signal out.Wherein, the voltage magnitude of testing result output signal corresponds to the voltage of safety detection signal in section in different times
Amplitude halves.
In the present embodiment, the output safety detection signal by the way of voltage bounce of digital analog converter 1 is detected, this kind
The rule of safety detection signal is not easy to be noticeable, and is also not easy to be cracked by outside, therefore can realize well logical to intelligent radio
The hardware security protection for believing module, improves safety in utilization, the reliability of intelligent wireless communication module.
Embodiment 2
As shown in Figure 1, a kind of safety detection circuit for intelligent wireless communication module, set in intelligent wireless communication module
Main system 4, safety detection circuit include sequentially connected: digital analog converter 1, voltage conversion circuit 2 and analog-digital converter 3.
In the present embodiment, voltage conversion circuit 2 is bleeder circuit.As shown in Fig. 2, voltage conversion circuit 2 includes: the first resistance
Anti- R1, the second impedance R2.
Wherein, the input terminal INPUT of voltage conversion circuit 2 is connect with one end of the first impedance R1, voltage conversion circuit 2
Input terminal INPUT is connect with digital analog converter 1, inputs safety detection signal；The other end and voltage the conversion electricity of first impedance R1
The output end OUTPUT connection on road 2, the other end of the first impedance R1 export converted safety detection signal, and and analog-to-digital conversion
Device 3 connects.One end of second impedance R2 is connect with the other end of the first impedance R1, the other end ground connection of the second impedance R2.
In the present embodiment, use voltage change mode output safety detection signal for using voltage bounce variation pattern output
Safety detection signal, specifically includes:
Main system 4 controls digital analog converter 1 and exports different voltage values in equal time distances or not constant duration.Such as
Shown in Fig. 3, the voltage jitter that digital analog converter 1 exports, after voltage conversion circuit 2, the processing of analog-digital converter 3, output
Relevant testing result output signal.Wherein, the voltage magnitude of testing result output signal corresponding peace in section in different times
The voltage magnitude that full inspection surveys signal halves.
As shown in figure 3, time interval of the control digital analog converter 1 of main system 4 in 0.5s or 1s, safety detection signal
Voltage is changed by 1.8V, 2.4V, 0.8V, 1.2V, 2.0V.The detection knot of main system 4 is inputted after being handled by analog-digital converter 3
The constant duration changing voltage of fruit output signal is respectively 0.9V, 1.2V, 0.4V, and 0.6V, 1.0V are changed.
In the present embodiment, the output safety detection signal by the way of voltage bounce of digital analog converter 1 is detected, this kind
The rule of safety detection signal is not easy to be noticeable, and is also not easy to be cracked by outside, therefore can be realized to intelligent wireless communication module
Hardware security protection.
In a second embodiment, voltage change mode output safety detection signal is used to export using variation in voltage mode
Safety detection signal, specifically includes:
Constant duration output voltage amplitude is different in equal time distances or not for the control digital analog converter 1 of main system 4
Predetermined waveform.
As shown in figure 4, main system 4 controls the sine wave that 1 output smoothing of digital analog converter changes, pass through analog-digital converter 3
The testing result output signal that main system 4 is inputted after processing carries out multi-point sampling, then simulates original waveform and be compared.The reality
Apply the amplitude that example can make client that waveform be arranged according to actual needs, period of change, convenient for design.
In third embodiment, voltage change mode output safety detection signal is used to become for the voltage with setpoint frequency
Change mode output safety detects signal, specifically includes:
The waveform that main system control digital analog converter changes according to setpoint frequency output voltage amplitude.
As shown in figure 5, the waveform that digital analog converter 1 exports in the present embodiment can use sine wave, square wave, triangular wave
Deng, and waveform frequency can change.Amplitude and corresponding time by detection waveform, calculate the frequency of waveform, and pass through judgement
The correctness of frequency carries out safety verification.Advantage of this embodiment is that using periodically variable waveform as safety detection
Signal, it is bigger to crack difficulty compared with the prior art.
As shown in Figure 1, a kind of safety detection circuit for intelligent wireless communication module disclosed by the invention, specific works
Principle is as follows:
Main system 4 controls digital analog converter 1 and detects signal using voltage change mode output safety；Voltage conversion circuit 2
Safety detection signal is inputted, and exports converted safety detection signal；Analog-digital converter 3 inputs converted safety detection letter
Number, after processing formed testing result output signal be sent to main system 4 detect the testing result output signal whether with safety
Detection signal is mutually matched.
Main system 4 judges whether safety detection signal matches with testing result output signal；Upon a match, allow intelligent nothing
Line communication module operates normally.When mismatching, intelligent wireless communication module forces power-off, is forbidden to use.
In the present embodiment, the input of analog-digital converter 3 has certain allowance, then when the converted safety being an actually-received
Signal is detected compared to the allowance model that ideal converted safety detection signal has different and inputs in analog-digital converter 3
Signal output when enclosing interior, within the scope of the testing result output signal allowable error of the conversion output of analog-digital converter 3, it is thus possible to
Avoid the erroneous judgement as caused by the detection error in tolerance.
It, can be by one section of predefined sequence code shielding during intelligent wireless communication module carries out production line test
Safety detection mechanism is stated, after engineering test completion puts goods on the market use, by the detection of safety detection circuit in the way of brush machine
Function enables.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (4)
1. a kind of safety detection circuit for intelligent wireless communication module, which is characterized in that the intelligent wireless communication module
Main system is inside set, the safety detection circuit includes:
Digital analog converter, the main system control the digital analog converter and detect signal using voltage change mode output safety；
It is described to use voltage change mode output safety detection signal for using voltage bounce variation pattern output safety detection letter
Number, it specifically includes:
The main system controls the digital analog converter and exports different voltage values in equal time distances or not constant duration；
Or,
It is described to use voltage change mode output safety detection signal to detect signal, tool using variation in voltage mode output safety
Body includes:
Constant duration output voltage amplitude is different in equal time distances or not for the main system control digital analog converter
Predetermined waveform；Or,
It is described to use voltage change mode output safety detection signal for the voltage change mode output safety with setpoint frequency
Signal is detected, is specifically included:
The main system controls the waveform that the digital analog converter changes according to the setpoint frequency output voltage amplitude；
Voltage conversion circuit inputs the safety detection signal, and exports converted safety detection signal；
Analog-digital converter inputs the converted safety detection signal, forms testing result output signal after processing and sends
Detect whether the testing result output signal is mutually matched with the safety detection signal to the main system.
2. being used for the safety detection circuit of intelligent wireless communication module as described in claim 1, which is characterized in that the voltage
Conversion circuit is bleeder circuit.
3. being used for the safety detection circuit of intelligent wireless communication module as claimed in claim 1 or 2, which is characterized in that described
Voltage conversion circuit includes:
One end of first impedance, first impedance is electrically connected with the digital analog converter, inputs the safety detection signal；Institute
The other end for stating the first impedance exports the converted safety detection signal, and is electrically connected with the analog-digital converter；
Second impedance, one end of second impedance are electrically connected with the other end of first impedance, second impedance it is another
One end ground connection.
4. being used for the safety detection circuit of intelligent wireless communication module as described in claim 1, which is characterized in that the principal series
System judges whether the safety detection signal matches with the testing result output signal；Upon a match, allow the intelligent nothing
Line communication module operates normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121341.8A CN106872826B (en) | 2017-03-02 | 2017-03-02 | Safety detection circuit for intelligent wireless communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121341.8A CN106872826B (en) | 2017-03-02 | 2017-03-02 | Safety detection circuit for intelligent wireless communication module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106872826A CN106872826A (en) | 2017-06-20 |
| CN106872826B true CN106872826B (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710121341.8A Active CN106872826B (en) | 2017-03-02 | 2017-03-02 | Safety detection circuit for intelligent wireless communication module |
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| CN205656608U (en) * | 2016-04-13 | 2016-10-19 | 广州小微电子技术有限公司 | Safety inspection circuit structure and contain chip, Chip module of this structure |
| CN106332157A (en) * | 2015-07-06 | 2017-01-11 | 中兴通讯股份有限公司 | Wireless communication device detection method and wireless communication device |
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|---|---|---|---|---|
| CN201344962Y (en) * | 2008-12-29 | 2009-11-11 | 比亚迪股份有限公司 | Antenna status detecting circuit for wireless module |
| KR20140019640A (en) * | 2012-08-07 | 2014-02-17 | (주)시스베이 | Apparatus for detecting motion using wireless tag and security apparatus comprising the same, and method for detecting motion using the same |
| CN103887760A (en) * | 2012-12-20 | 2014-06-25 | 通用电气公司 | Fault protection system and method |
| CN203151377U (en) * | 2013-02-26 | 2013-08-21 | 深圳市阿科达汽车电子有限公司 | Voltage converting circuit and vehicle-mounted DVD navigator |
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| CN106872826A (en) | 2017-06-20 |
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Address after: 200233 room 193, 2f, No. 25-1, Hongcao Road, Xuhui District, Shanghai Patentee after: QUECTEL WIRELESS SOLUTIONS Co.,Ltd. Address before: 200233 Shanghai city Xuhui District Tianzhou Road No. 99 building 13 Room 501 Patentee before: QUECTEL WIRELESS SOLUTIONS Co.,Ltd. |