CN203966114U - A kind of intrinsic safety type usb circuit for inflammable and explosive place electronic equipment - Google Patents
A kind of intrinsic safety type usb circuit for inflammable and explosive place electronic equipment Download PDFInfo
- Publication number
- CN203966114U CN203966114U CN201420081593.4U CN201420081593U CN203966114U CN 203966114 U CN203966114 U CN 203966114U CN 201420081593 U CN201420081593 U CN 201420081593U CN 203966114 U CN203966114 U CN 203966114U
- Authority
- CN
- China
- Prior art keywords
- signal
- power supply
- safety barrier
- circuit
- suppression diode
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model relates to the intrinsic safety type usb circuit design that is applied to inflammable and explosive place electronic equipment.This design has adopted the technology of power supply magnetic isolation+signal magnetic isolation+safety barrier, by the acting in conjunction of boost module, power isolation module, signal isolating chip, Transient Suppression Diode and safety barrier, reach the explosion-proof effect in the USB interface essential safety of inflammable and explosive place electronic equipment.The design is mainly comprised of boost module, insulating power supply, signal isolating chip, safety barrier, common mode inductance and Transient Suppression Diode.This design that the utility model provides, has advantages of that reliability is high, stable performance, can fundamentally solve the essential safety problem of electronic equipment signaling interface communication in inflammable and explosive place.
Description
Technical field
The utility model belongs to safety in production support equipment field.Be particularly related to the electronic device design with equipment room interactive interface in inflammable and explosive place.
Background technology
Along with social progress, the development of science and technology, the electronic equipment that is applied to the hazardous area such as inflammable and explosive is more and more, the intelligent level of these equipment is also more and more higher, therefore the communication of data need to be carried out in explosive area under many circumstances by interface, due to the specific (special) requirements of working environment, if Design of Communication Interface is improper, make to nonserviceable strike sparks down, the situation such as overheated, will cause potential dangerous hidden danger.
Therefore, the above problem existing for the electronic equipment of the hazardous area such as inflammable and explosive, develop a kind of safe, reliably, data communication interface device easily, have important practical significance.
Summary of the invention
USB interface has become the de facto standard that digital product is communicated by letter with PC at present.The purpose of this utility model is for overcoming the weak point of prior art, proposes a kind of usb circuit design that is applied to the hazardous area such as inflammable and explosive.Applying the USB interface of this circuit can directly use in hazardous location, avoid increasing at flame proof bulkhead in order to use interface communication the labyrinth of interface hatch door, and having alleviated weight of equipment and design difficulty, the design original intention of this interface be take intrinsic safety interface as target design.
The utility model proposes a kind of usb circuit design that is applied to the electronic equipment of the hazardous area such as inflammable and explosive, it is characterized in that, this main circuit will be comprised of boost module, insulating power supply chip, signal isolating chip, safety barrier, common mode inductance and Transient Suppression Diode; Wherein, a side of power supply chip, signal isolating chip, corresponding safety barrier, boost module, corresponding Transient Suppression Diode and corresponding common mode inductance are as circuit part I, and all the other are as circuit part II.The power supply of integrated circuit is to reach circuit part II by circuit part I, and signal carries out two-way differential transfer between circuit part I and circuit part II.Power supply is being introduced into boost module after corresponding safety barrier, then enters the primary side of insulating power supply and the primary side of isolating chip, gives the primary side of power isolation module and the power supply of the primary side of signal isolating chip; The corresponding safety barrier of differential data signals Yi road signal process, then pass through common mode inductance, the primary side of while arriving signal isolating chip under the monitoring that is subject to Transient Suppression Diode; The secondary side of insulating power supply is connected with the secondary side of isolation signals chip; The isolation signals of isolation signals chip secondary side is connected with miscellaneous equipment circuit through common mode inductance and safety barrier under the monitoring of Transient Suppression Diode; Another road signal of differential data signals anti-phase from isolation signals end through the corresponding safety barrier of secondary side of signal isolating chip, Transient Suppression Diode, common mode inductance the data-signal to circuit part I, the differential signal communication of complete.
These technology common guarantee the normal use of USB interface in inflammable and explosive hazardous area, and the anti-explosion safety performance of intrinsically safe circuit.
Boost module described in the utility model is for maintaining the USB supply voltage of feeder ear.
Insulating power supply described in the utility model is for generation of the safe voltage of isolation.
Safety barrier described in the utility model, for when the faults such as system is short-circuited, releasing energy of limiting circuit, guarantees system nature's safety.
Common mode inductance described in the utility model is in order to eliminate the common-mode noise in USB difference mode signal.
Transient Suppression Diode described in the utility model is mainly used in circuit component to carry out quick overvoltage protection.
The utlity model has following characteristics and beneficial effect:
The utility model circuit is applicable to the electronic device design with USB interface communication in inflammable and explosive place; on power supply and in data transmission, all adopted the technology of magnetic isolation; and combine safety barrier technology, voltage stabilizing technique and the transient voltage protection of boosting; make that this circuit form is simple, fast response time, safe reliability be high; on this basis; can be so that field apparatus volume reduce, weight saving, and bring convenience to the structural design of complete machine.This circuit volume is little, portable strong, can be used as the general scheme under the explosive site surrounding of combustion with the electronic device design of USB interface communication.
Accompanying drawing explanation
Fig. 1 is intrinsic safety type usb circuit schematic diagram of the present utility model.
Embodiment
The usb circuit design the utility model proposes, is applicable to the manufacture of inflammable and explosive hazardous area electronic equipment, can improve security, the practicality of product and reduce weight, by reference to the accompanying drawings 1 and embodiment be described in detail as follows:
As shown in Figure 1, this main circuit will be comprised of power isolation module 3, signal isolating chip 5, safety barrier 1, boost module 2, common mode inductance 4, Transient Suppression Diode 6 usb circuit described in the utility model; Wherein, the primary side of the primary side of insulating power supply 3, signal isolating chip 6 and corresponding safety barrier 1, boost module 2, common mode inductance 4, Transient Suppression Diode 6 have formed circuit part I jointly; The secondary side of the secondary side of insulating power supply 3, signal isolating chip 6 and corresponding common mode inductance 4, Transient Suppression Diode 6, safety barrier 1 have formed circuit I I jointly.Circuit part I and circuit part II can be according to actual master-slave communication situations (feeder ear is different), be placed on respectively explosive area and place of safety, for on-the-spot handheld device etc. from equipment, circuit part I just can be placed on place of safety, as flame proof out of my cabin, circuit part II just can be placed on non-security district, in flame proof cabin; For on-the-spot main equipment, circuit part I just can be placed on non-security district, and in flame proof cabin, circuit part II just can be placed on place of safety, as flame proof out of my cabin.Power supply is entering boost module 2 after corresponding isolation safe grid 1, then enters the primary side of insulating power supply 3 and the primary side of signal isolating chip 5, gives the primary side of power isolation module 3 and the power supply of the primary side of signal isolating chip 5; The secondary side of insulating power supply 3 is connected with the secondary side of signal isolating chip 5; The secondary side of insulating power supply 3 is given isolation power supply through corresponding safety barrier 1; Differential data signals is passed through corresponding safety barrier 1, pass through again corresponding common mode inductance 4, be subject to the protection of Transient Suppression Diode 6 simultaneously, then by signal isolating chip 5, again with corresponding common mode inductance 4, be subject to the protection of Transient Suppression Diode 6 simultaneously, finally by crossing corresponding safety barrier 1, form USB differential signal;
Function and the embodiment of each parts of the present utility model are respectively described below:
Safety barrier 1 described in the utility model.Its basic role is by Limited Current and voltage, makes at unusual condition, and under the state of short circuit, the energy that intrinsically safe circuit partly discharges is in safe controlled range.Safety barrier can adopt one or several connection in series-parallel in the elements such as fuse, resistance, transient voltage twin zener dioder, stabilivolt to use.A kind of typical application scheme is, the safety barrier of primary side adopts at a fuse of power end serial connection, then is connected in series one or more current-limiting resistances and and connects one or more Zener diodes.
Boost module 2 described in the utility model, is mainly used in maintaining the USB supply voltage of feeder ear, makes power supply and signal transmission more stable.
Insulating power supply 3 described in the utility model, adopts magnetic isolation method, gives signal isolating chip 5 power supplies.This power supply can adopt transformer or isolating chip, as Adum5000 chip.
Common mode inductance 4 described in the utility model is in order to eliminate the common-mode noise in USB difference mode signal, as ACM3225 chip.
Signal isolating chip 5 described in the utility model, adopts magnetic isolation method, by insulating power supply 3, powers to respectively signal isolating chip two ends.USB differential data signals is isolated through signal isolating chip 5.This isolation signals chip can adopt signal isolating chip, as Adum4160 chip.
Transient Suppression Diode 6 described in the utility model, is mainly used in circuit component to carry out quick overvoltage protection.It can the surging signal of " absorption " power up to thousands of watts.Transient Suppression Diode has the plurality of advantages such as volume is little, power large, response is fast, noiseless.
Principle of work of the present utility model is: communication power supply has adopted insulating power supply 3, and primary side and secondary side at insulating power supply 3 have all increased safety barrier 1, if therefore when the faults such as equipment is short-circuited, can guarantee that the voltage of intrinsically safe circuit power unit, electric current can not surpass the limit value of requirement of explosion proof; Boost module 2, guarantees that USB power supply is stable; Signal has adopted signal isolating chip 5, and side and secondary side at signal isolating chip 5 have all increased safety barrier 1, Transient Suppression Diode 6 and common mode inductance 4, guaranteed the quality of differential signal, and electric current and voltage is all within requirement of explosion proof, thereby guaranteed the safety of intrinsically safe circuit part.
Claims (2)
1. for an intrinsic safety type usb circuit for inflammable and explosive place electronic equipment, it is characterized in that, this main circuit will be comprised of boost module, insulating power supply chip, signal isolating chip, safety barrier, common mode inductance and Transient Suppression Diode; Wherein, a side of power isolation module, a side of signal isolating chip, corresponding safety barrier, boost module, corresponding Transient Suppression Diode and corresponding common mode inductance are as circuit part I, and the secondary side of power isolation module, the secondary side of signal isolating chip, corresponding safety barrier, corresponding Transient Suppression Diode and corresponding common mode inductance are as circuit part II.
Power supply is being introduced into boost module after corresponding safety barrier, then enters the primary side of insulating power supply and the primary side of isolating chip, gives the primary side of power isolation module and the power supply of the primary side of signal isolating chip; The corresponding safety barrier of differential data signals Yi road signal process, then pass through common mode inductance, the primary side of while arriving signal isolating chip under the monitoring that is subject to Transient Suppression Diode; The secondary side of insulating power supply is connected with the secondary side of isolation signals chip; The isolation signals of isolation signals chip secondary side is connected with miscellaneous equipment circuit through common mode inductance and safety barrier under the monitoring of Transient Suppression Diode; Another road signal of differential data signals anti-phase from isolation signals end through the corresponding safety barrier of secondary side of signal isolating chip, Transient Suppression Diode, common mode inductance the data-signal to circuit part I, the differential signal communication of complete.
2. usb circuit as claimed in claim 1, is characterized in that, the power supply of integrated circuit be by circuit part I to circuit part II, signal carries out two-way differential transfer between circuit part I and circuit part II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420081593.4U CN203966114U (en) | 2014-02-25 | 2014-02-25 | A kind of intrinsic safety type usb circuit for inflammable and explosive place electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420081593.4U CN203966114U (en) | 2014-02-25 | 2014-02-25 | A kind of intrinsic safety type usb circuit for inflammable and explosive place electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203966114U true CN203966114U (en) | 2014-11-26 |
Family
ID=51926671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420081593.4U Expired - Fee Related CN203966114U (en) | 2014-02-25 | 2014-02-25 | A kind of intrinsic safety type usb circuit for inflammable and explosive place electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203966114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866449A (en) * | 2014-02-25 | 2015-08-26 | 北京中安科创科技发展有限公司 | Intrinsic safety type USB (universal serial bus) interface circuit for electronic devices in flammable and combustible places |
-
2014
- 2014-02-25 CN CN201420081593.4U patent/CN203966114U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866449A (en) * | 2014-02-25 | 2015-08-26 | 北京中安科创科技发展有限公司 | Intrinsic safety type USB (universal serial bus) interface circuit for electronic devices in flammable and combustible places |
| CN104866449B (en) * | 2014-02-25 | 2018-10-12 | 北京中安科创科技发展有限公司 | A kind of intrinsic safety type usb circuit for combustible and explosive area electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104866449A (en) | Intrinsic safety type USB (universal serial bus) interface circuit for electronic devices in flammable and combustible places | |
| CN105188207B (en) | A kind of centrally connected power source centralized Control type illuminator | |
| CN204788092U (en) | Safe type electric cap initiating device | |
| CN202815566U (en) | Isolated intelligent safety barrier | |
| CN203966114U (en) | A kind of intrinsic safety type usb circuit for inflammable and explosive place electronic equipment | |
| CN102761117A (en) | Steel rail potential protector and working method thereof | |
| CN103927020A (en) | Intrinsically-safe-type keyboard circuit used for electronic equipment in flammable and explosive places | |
| CN202166673U (en) | Experiment power box with voice alarm function | |
| CN202102987U (en) | Mining explosion-proof breaker circuit | |
| CN205377048U (en) | Intelligent cubical switchboard with state of synthesis detects function | |
| CN103885343A (en) | Wireless gateway device with explosion suppression and electromagnetic shielding function | |
| CN205195256U (en) | Surge and pulse group suppression circuit | |
| CN203026938U (en) | Lightning protection protector for oil-electricity hybrid workover rig | |
| CN206542483U (en) | A kind of analog video signal isolation circuit of explosive atmosphere electrical installation | |
| CN102315636A (en) | Lightning protection circuit for direct current motor and main power supply circuit | |
| CN204145454U (en) | Mine-used I. S audio digital signals transducer | |
| CN204013225U (en) | Power control circuit | |
| CN206322953U (en) | A kind of RJ45 connectors of integrated lightning protection function | |
| CN202797876U (en) | Mining intrinsic safety type light-emitting diode (LED) display screen | |
| CN201887448U (en) | Isolating safety barrier | |
| CN202565149U (en) | Intrinsically safe converter wide in input voltage range | |
| CN202221890U (en) | Lightening proof circuit used for DC motor and main power source return circuit | |
| CN204271634U (en) | A kind of large through-flow module lightning protection device structure | |
| CN203720296U (en) | New type welding machine open-phase and housing grounding detection device | |
| CN203522172U (en) | Electromagnetic interference protection circuit for gas engine ECU ignition module |
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: 20141126 Termination date: 20150225 |
|
| EXPY | Termination of patent right or utility model |