CN106776415A - Evidence obtaining all-in-one on-off circuit and evidence obtaining machine - Google Patents
Evidence obtaining all-in-one on-off circuit and evidence obtaining machine Download PDFInfo
- Publication number
- CN106776415A CN106776415A CN201710035839.2A CN201710035839A CN106776415A CN 106776415 A CN106776415 A CN 106776415A CN 201710035839 A CN201710035839 A CN 201710035839A CN 106776415 A CN106776415 A CN 106776415A
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- CN
- China
- Prior art keywords
- resistance
- chips
- evidence obtaining
- electric capacity
- circuit
- 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.)
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4286—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a handshaking protocol, e.g. RS232C link
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0002—Serial port, e.g. RS232C
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
Abstract
The invention belongs to electronic applications, there is provided one kind evidence obtaining all-in-one on-off circuit, the on-off circuit includes：A04419 chips, voltage source VCC, resistance, electric capacity, triode Q5 and voltage output end；Wherein,Voltage source VCC is connected with one end of the 6th resistance R6,The other end connection control signal input port of the 6th resistance R6,Control signal input port is connected with one end of the 5th resistance R5,The other end of the 5th resistance R5 connects the G pins of A04419 chips,The S1 of VCC and A04419 chips,S2,S3 pins are connected,The D1 of A04419 chips,D2,D3,D4 interfaces are connected with voltage output end respectively,One end connection VCC of the 7th electric capacity C7,The other end of the 7th electric capacity C7 connects the G pins of A04419 chips,The base stage of triode Q5 connects the other end of the 5th resistance R5,The colelctor electrode of triode Q5 connects one end of the 7th resistance R7,The other end connection voltage output end of the 7th resistance R7,The grounded emitter of triode Q5.The present invention has the advantages that safe.
Description
Technical field
The present invention relates to law and electronic technology field, more particularly to a kind of evidence obtaining all-in-one on-off circuit and evidence obtaining
Machine.
Background technology
Evidence obtaining all-in-one is the common equipment of public security or office of law court, and it is mainly used in being transferred to court evidence, special
It is not to be transferred for the data of electronic evidence, it is more and more that existing electronic evidence is at law, so evidence obtaining one
The use of body machine is also more and more, and evidence obtaining all-in-one can only read, it is impossible to write, because for evidence, if write-in,
The more change of evidence can be caused, this is impermissible for for Evidence in Litigation, thus evidence obtaining all-in-one need read-only interface, it is necessary to
Write-in functions are closed, existing evidence obtaining all-in-one on-off circuit reliability is low, causes security low.
The content of the invention
An object of the present invention is to provide a kind of evidence obtaining all-in-one on-off circuit, and it mainly solves existing evidence obtaining one
The low shortcoming of machine security.
First aspect, there is provided one kind evidence obtaining all-in-one on-off circuit, the on-off circuit includes：
A04419 chips, voltage source VCC, resistance, electric capacity, triode Q5 and voltage output end；
Wherein, voltage source VCC is connected with one end of the 6th resistance R6, and the other end connection control signal of the 6th resistance R6 is defeated
Entrance, control signal input port is connected with one end of the 5th resistance R5, and the other end of the 5th resistance R5 connects the G of A04419 chips
Pin, VCC is connected with S1, S2, S3 pin of A04419 chips, D1, D2, D3, D4 interface of A04419 chips respectively with voltage
Output end is connected, and the other end of one end connection VCC, the 7th electric capacity C7 of the 7th electric capacity C7 connects the G pins of A04419 chips, three
The base stage of pole pipe Q5 connects the other end of the 5th resistance R5, and the colelctor electrode of triode Q5 connects one end of the 7th resistance R7, the 7th
The other end connection voltage output end of resistance R7, the grounded emitter of triode Q5.
A kind of second aspect, there is provided evidence obtaining machine, the evidence obtaining machine includes above-mentioned evidence obtaining all-in-one on-off circuit.
Although those of ordinary skill in the art will be appreciated that following detailed description carries out referenced in schematic embodiment, accompanying drawing,
But the present invention is not limited in these embodiments.But, the scope of the present invention is extensive, and is intended to be bound only by appended right
It is required that limiting the scope of the present invention.
Brief description of the drawings
By the detailed description made to non-limiting example made with reference to the following drawings of reading, it is of the invention other
Feature, objects and advantages will become more apparent upon：
Fig. 1 illustrates for the circuit of the evidence obtaining read-only interface circuit of all-in-one provided according to a preferred embodiment of the invention
Figure.
Fig. 2 is the change-over circuit schematic diagram provided according to a preferred embodiment of the invention.
Fig. 3 is the control circuit diagram provided according to a preferred embodiment of the invention.
Fig. 4 is the on-off circuit schematic diagram provided according to a preferred embodiment of the invention.
Specific embodiment
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The treatment described as flow chart or method.Although operations to be described as flow chart the treatment of order, therein to be permitted
Multioperation can be implemented concurrently, concomitantly or simultaneously.Additionally, the order of operations can be rearranged.When it
The treatment can be terminated when operation is completed, it is also possible to have the additional step being not included in accompanying drawing.The treatment
Can correspond to method, function, code, subroutine, subprogram etc..
Alleged within a context " computer equipment ", also referred to as " computer ", referring to can be by running preset program or referring to
Make performing the intelligent electronic device of the predetermined process process such as numerical computations and/or logical calculated, its can include processor with
Memory, the survival instruction prestored in memory by computing device performs predetermined process process, or by ASIC,
The hardware such as FPGA, DSP perform predetermined process process, or are combined by said two devices and to realize.Computer equipment includes but does not limit
In server, PC, notebook computer, panel computer, smart mobile phone etc..
Method (some of them are illustrated by flow) discussed hereafter can be by hardware, software, firmware, centre
Part, microcode, hardware description language or its any combination are implemented.Implement when with software, firmware, middleware or microcode
When, it is used to implement that the program code or code segment of necessary task can be stored in machine or computer-readable medium (is such as deposited
Storage media) in.(one or more) processor can implement necessary task.
Concrete structure disclosed herein and function detail are only representational, and are for describing of the invention showing
The purpose of example property embodiment.But the present invention can be implemented by many alternative forms, and be not interpreted as
It is limited only by the embodiments set forth herein.
Although it should be appreciated that may have been used term " first ", " second " etc. herein to describe unit,
But these units should not be limited by these terms.It is used for the purpose of a unit and another unit using these terms
Make a distinction.For example, in the case of the scope without departing substantially from exemplary embodiment, it is single that first module can be referred to as second
Unit, and similarly second unit can be referred to as first module.Term "and/or" used herein above include one of them or
Any and all combination of more listed associated items.
Term used herein above is not intended to limit exemplary embodiment just for the sake of description specific embodiment.Unless
Context clearly refers else, and singulative " one " otherwise used herein above, " one " also attempt to include plural number.Should also
When understanding, term used herein above " including " and/or "comprising" specify stated feature, integer, step, operation,
The presence of unit and/or component, and do not preclude the presence or addition of one or more other features, integer, step, operation, unit,
Component and/or its combination.
It should further be mentioned that in some replaces realization modes, the function/action being previously mentioned can be according to different from attached
The order indicated in figure occurs.For example, depending on involved function/action, the two width figures for showing in succession actually may be used
Substantially simultaneously to perform or can perform in a reverse order sometimes.
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention provides a kind of evidence obtaining read-only interface circuit of all-in-one, the circuit as described in Figure 1, including：One point of four extension
Device 10, change-over circuit 11, control circuit 12, on-off circuit 13；
Wherein, one point of four expander 10 includes：1 input port of USB interface 101 and 4 output ends of USB interface
Mouthful, 1 the two of the output port of USB interface data in the input of change-over circuit 11 and 4 output ports of USB interface
Interface (USB1+, USB1 -) is connected, and the output end of change-over circuit 11 is RS232 ports, the RS232 ports and control circuit 12
Input connection, control circuit 12 two output ends distinguish connecting valve circuit input, the output end of on-off circuit
Respectively with two power interfaces of USB interface.
As shown in figure 4, the on-off circuit includes：Chip (model A04419), voltage source VCC, resistance, electric capacity, triode
Q5, voltage output end；
Wherein, VCC is connected with one end of the 6th resistance R6, the other end connection control signal input port of the 6th resistance R6
(i.e. 22, No. 24 pins of control chip), control signal input port is connected with one end of the 5th resistance R5, and the 5th resistance R5's is another
The G pins of one end connection chip (model A04419), VCC is connected with S1, S2, S3 pin of chip (model A04419), chip
D1, D2, D3, D4 interface of (model A04419) are connected with voltage output end respectively, one end connection VCC of the 7th electric capacity C7, the
The G pins of other end connection chip (model A04419) of seven electric capacity C7, the base stage of triode Q5 connects the another of the 5th resistance R5
One end, the colelctor electrode of triode Q5 connects one end of the 7th resistance R7, the other end connection voltage output end of the 7th resistance R7, three
The grounded emitter of pole pipe Q5.
Its principle is that A04419 is enhanced PMOS chip, when control signal input port input high level, A04419
Conducting, VCC by A04419 chips for voltage output end is powered, meanwhile, Q5 base stages due to also have high level, Q5 turn on, R7
It is protective resistance, corresponding protection is provided A04419, so it has the advantages that switch reliability is high, it is safe.
The concrete scheme of this circuit is to extend to 4 by 1 USB interface (USB interface with the equipment of evidence obtaining is connected)
Whether individual USB interface, with data output other two power supplies of USB are controlled by 1 interface in 4 USB interfaces, right
For should collecting evidence, when it has data output, USB1+, USB1-and signal is just had, the control circuit 12 is used for described
When RS232 has signal, control output end exports the such RS232 of high level and just has signal transmission to circuit is controlled, and control is electric
When road detects that RS232 has signal output, control output end output high level, so as to turn on the first triode and the two or three pole
Pipe, so that other 2 USB interfaces can be used.
The present invention is not related to the change of software, the driving that following chips (including conversion chip) can be provided using producer
To realize this circuit.
As shown in Fig. 2 as one of embodiment, the change-over circuit 11, including：Conversion chip (model：
FT232RL), filter circuit 112 and voltage source VCC, wherein, 15,16 pins of conversion chip connect respectively USB1+, USB1-；
1, No. 5 pins of conversion chip are respectively the TXD output ends and RXD output ends of RS232, the electric capacity of connection first of voltage source VCC
C1, the second electric capacity C2, one end of the 3rd electric capacity C3, the first electric capacity C1, the second electric capacity C2, the other end ground connection of the 3rd electric capacity C3,
20, No. 4 pins of the voltage source VCC also with conversion chip are connected.
Wherein the first electric capacity C1 is the electric capacity of high capacitance, and the second electric capacity C2 is the electric capacity of middle capacitance, the 3rd electric capacity C3
It is the electric capacity of small capacitances amount, this setting can be filtered treatment to different high frequencies, intermediate frequency, low frequency waveform, improve voltage source
Quality.
As shown in figure 3, used as one of embodiment, control circuit 12 includes：Chip (AT89S52-24AU), crystal oscillator electricity
Road 122；Wherein, 5, No. 7 pins connection of chip connects the TXD output ends and RXD output ends of conversion chip respectively, chip
22nd, No. 24 control signal input ports of pin difference connecting valve circuit, 29, the 38 pins connection voltage source VCC of chip, chip
No. 14 pins connection crystal oscillator Y one end, the other end of crystal oscillator Y connects No. 15 pins of chip, and first resistor R1 and crystal oscillator Y is simultaneously
Connection, the one end of one end of crystal oscillator Y also with the 4th electric capacity C4 be connected, and the other end of the 4th electric capacity C4 is grounded, and the other end of crystal oscillator Y is also
One end with the 4th electric capacity C5 is connected, the other end ground connection of the 5th electric capacity C5.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, can be with
Realize by another way.Device embodiment described above is only schematical, for example, the division of the unit,
It is only a kind of division of logic function, there can be other dividing mode when actually realizing, but for example, multiple units or component can
To combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or beg for
The coupling each other of opinion or direct-coupling or communication connection can be by some communication interfaces, device or unit it is indirect
Coupling is communicated to connect, and can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.
If the function is to realize in the form of SFU software functional unit and as independent production marketing or when using, can be with
Storage is in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used to so that a computer equipment (can be individual
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it all should cover in the middle of the scope of claim of the invention and specification.
Claims (2)
1. a kind of evidence obtaining all-in-one on-off circuit, it is characterised in that the on-off circuit includes：
A04419 chips, voltage source VCC, resistance, electric capacity, triode Q5 and voltage output end；
Wherein, voltage source VCC is connected with one end of the 6th resistance R6, the other end connection control signal input of the 6th resistance R6
Mouthful, control signal input port is connected with one end of the 5th resistance R5, and the G of the other end connection A04419 chips of the 5th resistance R5 draws
Pin, VCC is connected with S1, S2, S3 pin of A04419 chips, and D1, D2, D3, D4 interface of A04419 chips are defeated with voltage respectively
Go out end connection, the other end of one end connection VCC, the 7th electric capacity C7 of the 7th electric capacity C7 connects the G pins of A04419 chips, three poles
The base stage of pipe Q5 connects the other end of the 5th resistance R5, and the colelctor electrode of triode Q5 connects one end of the 7th resistance R7, the 7th electricity
Hinder the other end connection voltage output end of R7, the grounded emitter of triode Q5.
2. a kind of evidence obtaining machine, it is characterised in that the evidence obtaining machine includes evidence obtaining all-in-one switch electricity as claimed in claim 1
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035839.2A CN106776415A (en) | 2017-01-17 | 2017-01-17 | Evidence obtaining all-in-one on-off circuit and evidence obtaining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035839.2A CN106776415A (en) | 2017-01-17 | 2017-01-17 | Evidence obtaining all-in-one on-off circuit and evidence obtaining machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106776415A true CN106776415A (en) | 2017-05-31 |
Family
ID=58944360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710035839.2A Pending CN106776415A (en) | 2017-01-17 | 2017-01-17 | Evidence obtaining all-in-one on-off circuit and evidence obtaining machine |
Country Status (1)
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2638140Y (en) * | 2003-06-18 | 2004-09-01 | 联想(北京)有限公司 | Computer external equipment capable of supply expanded USB interface |
| CN101794267A (en) * | 2010-03-12 | 2010-08-04 | 上海华申智能卡应用系统有限公司 | USB (Universal Serial Bus) switching device and realizing method thereof |
| CN101860188A (en) * | 2010-06-07 | 2010-10-13 | 鸿富锦精密工业（深圳）有限公司 | Switch power supply circuit |
| CN101959351A (en) * | 2010-10-15 | 2011-01-26 | 上海小糸车灯有限公司 | P-MOS tube driving circuit and driving method thereof |
| US20110161545A1 (en) * | 2009-12-31 | 2011-06-30 | Alcor Micro Corp. | I2c/spi control interface circuitry, integrated circuit structure, and bus structure thereof |
| CN203950306U (en) * | 2014-06-13 | 2014-11-19 | 深圳市卓翼科技股份有限公司 | USB port expanded circuit and mobile terminal |
-
2017
- 2017-01-17 CN CN201710035839.2A patent/CN106776415A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2638140Y (en) * | 2003-06-18 | 2004-09-01 | 联想(北京)有限公司 | Computer external equipment capable of supply expanded USB interface |
| US20110161545A1 (en) * | 2009-12-31 | 2011-06-30 | Alcor Micro Corp. | I2c/spi control interface circuitry, integrated circuit structure, and bus structure thereof |
| CN101794267A (en) * | 2010-03-12 | 2010-08-04 | 上海华申智能卡应用系统有限公司 | USB (Universal Serial Bus) switching device and realizing method thereof |
| CN101860188A (en) * | 2010-06-07 | 2010-10-13 | 鸿富锦精密工业（深圳）有限公司 | Switch power supply circuit |
| CN101959351A (en) * | 2010-10-15 | 2011-01-26 | 上海小糸车灯有限公司 | P-MOS tube driving circuit and driving method thereof |
| CN203950306U (en) * | 2014-06-13 | 2014-11-19 | 深圳市卓翼科技股份有限公司 | USB port expanded circuit and mobile terminal |
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