CN209514605U - A kind of USB with intelligent parameter display function turns serial port device - Google Patents

Abstract

A kind of USB with intelligent parameter display function turns serial port device, including power supply mechanism, switching mechanism and mechanism for monitoring；Power supply mechanism includes that the overvoltage crowbar being electrically connected according to this, BUCK circuit and power isolation circuit, wherein overvoltage crowbar and USB interface are electrically connected；Switching mechanism includes the interface conversion chip, signal isolation unit and level conversion unit being successively electrically connected, the output end of interface conversion chip and USB interface and BUCK circuit is electrically connected, signal isolation unit is electrically connected with the output end of BUCK circuit, the output end of power isolation circuit and TTL interface, and output end, RS485/422 interface and the RS232 interface of level conversion unit and power isolation circuit are electrically connected；Mechanism for monitoring includes the arm processor and display screen being electrically connected.The utility model provides a kind of USB with intelligent parameter display function and turns serial port device, can obtain and show in real time the parameters in communication process, realizes the monitoring and control to device.

Description

A kind of USB with intelligent parameter display function turns serial port device

Technical field

It is specifically a kind of with intelligent parameter display function the utility model relates to interface conversion technical field USB turns serial port device.

Background technique

USB turns serial ports and realizes USB interface of computer to the conversion between universal serial port, and the computer for not serial ports mentions For quick channel, and using USB turn serial equipment and be equal to set the USB that traditional serial equipment becomes plug and play It is standby.It is one of essential communication interface of every computer as most widely used USB interface, its maximum feature is to support Hot plugging, plug and play, transmission speed are fast.

Modern industrial control field should most widely be no more than RS232, RS485, RS422 interface, and developing history is long, very much Field is all widely applied to be arrived.Such as some programming fans, serial ports can be used when using programmable device.There are also some machines Tool control system, access control system are all be unable to do without and are communicated using RS232, RS485, RS422.Traditional mainboard has this to connect Mouthful, but due to main board market positioning difference, many new mainboards and without serial interface.For example, notebook just seldom has this again A little legacy interfaces.Substitute other most of communication interfaces using USB interface so that some mainboards in connection RS232 serial ports or Difficult point is encountered when parallel port communication.There are also many products, the only simple power and energy completed between USB and serial ports, and Do not accomplish the monitoring and control to power and energy, the information such as voltage and current, the baud rate of product operation can not be learnt.

Utility model content

In order to solve deficiency in the prior art, the utility model provides a kind of USB with intelligent parameter display function Turn serial port device, can obtain and show in real time the parameters in communication process, realizes the monitoring and control to device.

To achieve the goals above, the utility model use the specific scheme is that a kind of have intelligent parameter display function USB turn serial port device, for connecting USB interface and serial line interface, serial line interface includes two RS485/422 interfaces, one RS232 interface and a TTL interface, described device include power supply mechanism, switching mechanism and mechanism for monitoring；The power supply mechanism packet The overvoltage crowbar being electrically connected according to this, BUCK circuit and power isolation circuit are included, wherein overvoltage crowbar and the USB Interface is electrically connected；The switching mechanism includes that the interface conversion chip, signal isolation unit and level being successively electrically connected turn Change unit, the output end of interface conversion chip and the USB interface and the BUCK circuit is electrically connected, signal isolation unit with The output end of BUCK circuit, the output end of the power isolation circuit and the TTL interface are electrically connected, level conversion unit It is electrically connected with the output end, the RS485/422 interface and the RS232 interface of power isolation circuit；The monitoring machine Structure includes the arm processor and display screen being electrically connected, the output end of arm processor and the overvoltage crowbar, described The output end of BUCK circuit, the output end of the power isolation circuit and the interface conversion chip and the signal isolation list The junction of member is electrically connected.

As a preferred embodiment, the model STM32F750V8T6 of the arm processor.

As a preferred embodiment, the overvoltage crowbar includes current monitoring chip, the model of current monitoring chip For zxct1009.

As a preferred embodiment, the BUCK circuit includes DC decompression converter, the model of DC decompression converter For MP2359.

As a preferred embodiment, the power isolation circuit includes voltage isolating chip, the model of voltage isolating chip For F0505S-1WRZ.

As a preferred embodiment, the model FT4232HL of the interface conversion chip.

As a preferred embodiment, the signal isolation unit includes four the first isolating chips and second isolated core Piece, four the first isolating chips are for realizing signal isolation, and the second isolating chip is for realizing for electric isolution, the first isolating chip Model ADUM1201AR, the model ADUM1200AR of the second isolating chip.

As a preferred embodiment, the level conversion unit includes electrical level transferring chip, and electrical level transferring chip electrically connects Three groups of driving chips are connected to, three groups of driving chips are electric with two RS485/422 interfaces and a RS232 interface respectively Property connection, the quantity of every group of driving chip is two, the model SN75LBC184D of driving chip.

The utility model has the advantages that when the utility model is used, arm processor is in real time from interface conversion chip and signal isolation unit Junction obtain the parameter of communication process, such as baud rate information etc., and obtain electrical parameter in real time from power supply mechanism, such as Then voltage, electric current etc. are output on display screen by liquid crystal control panel and are shown, so that user checks at any time, thus Realize the real-time monitoring to device.

Detailed description of the invention

Fig. 1 is the overall structure block diagram of the utility model；

Fig. 2 is the schematic diagram of the overvoltage crowbar of the utility model；

Fig. 3 is the schematic diagram of the BUCK circuit of the utility model；

Fig. 4 is the schematic diagram of the power isolation circuit of the utility model；

Fig. 5 is the connected mode schematic diagram of the interface conversion chip of the utility model；

Fig. 6 is the schematic diagram of the signal isolation unit of the utility model；

Fig. 7 is the schematic diagram of the level conversion unit of the utility model；

Fig. 8 is the schematic diagram of the serial line interface of the utility model；

Fig. 9 is the connected mode schematic diagram of the arm processor of the utility model；

Figure 10 is the schematic diagram of the connector of the utility model；

Figure 11 is the connected mode schematic diagram of the display screen of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, a kind of USB with intelligent parameter display function turns serial port device, for connecting USB interface and string Line interface, serial line interface include two RS485/422 interfaces, a RS232 interface and a TTL interface, and device includes power supply Mechanism, switching mechanism and mechanism for monitoring.

Power supply mechanism includes the overvoltage crowbar being electrically connected according to this, BUCK circuit and power isolation circuit, wherein mistake Voltage protection circuit and USB interface are electrically connected.

Switching mechanism includes the interface conversion chip, signal isolation unit and level conversion unit being successively electrically connected, and is connect The output end of mouth conversion chip and USB interface and BUCK circuit is electrically connected, the output end of signal isolation unit and BUCK circuit, The output end and TTL interface of power isolation circuit are electrically connected, the output end of level conversion unit and power isolation circuit, RS485/422 interface and RS232 interface are electrically connected.

Mechanism for monitoring includes the arm processor and display screen being electrically connected, the output of arm processor and overvoltage crowbar The connection at end, the output end of BUCK circuit, the output end of power isolation circuit and interface conversion chip and signal isolation unit Place is electrically connected.

When the utility model is used, being powered by USB interface, the electric current of USB interface input is by overvoltage protection electricity It is converted into 3.3V after road and BUCK circuit, is that the first half of arm processor, interface conversion chip and signal isolation unit carries out Power supply is powered using after power isolation circuit for the latter half of signal isolation unit and level conversion unit.Interface Conversion chip is used to complete the conversion of USB interface data and serial interface data, and realizes signal using signal isolation unit It is isolated, in serial line interface, two RS485/422 interfaces and a RS232 interface pass through level conversion unit and signal isolation list Member is electrically connected, and TTL interface is directly electrically connected with signal isolation unit.Arm processor in device operational process in real time from The junction of interface conversion chip and signal isolation unit obtains signal transmission information, obtains from the output end of overvoltage crowbar Voltage and current forms the first pyroelectric monitor information, obtains voltage and current composition the second pyroelectric monitor letter from the output end of BUCK circuit Breath, from the output end of power isolation circuit obtain voltage and current form third pyroelectric monitor information, then by signal transmit information, First pyroelectric monitor information, the second pyroelectric monitor information and third pyroelectric monitor information are transferred to display screen and are shown, to show in real time Show current data transmission scenarios and circuit conditions, realize the monitoring to device, and then is conducive to carry out signals transmission Control.

Fig. 2 to 11 is please referred to, in the present embodiment, the model STM32F750V8T6 of arm processor.

Further, overvoltage crowbar includes current monitoring chip, the model zxct1009 of current monitoring chip.

Further, BUCK circuit includes DC decompression converter, the model MP2359 of DC decompression converter.

Further, power isolation circuit includes voltage isolating chip, the model F0505S- of voltage isolating chip 1WRZ。

Further, the model FT4232HL of interface conversion chip.

Further, signal isolation unit include four the first isolating chips and second isolating chip, four first Isolating chip is for realizing signal isolation, and the second isolating chip is for realizing for electric isolution, the model of the first isolating chip ADUM1201AR, the model ADUM1200AR of the second isolating chip.

Further, level conversion unit includes electrical level transferring chip, and electrical level transferring chip is electrically connected with three groups of drivings Chip, three groups of driving chips are electrically connected with two RS485/422 interfaces and a RS232 interface respectively, every group of driving chip Quantity be two, the model SN75LBC184D of driving chip.

Further, common-mode filter, the type of common-mode filter are electrically connected between USB interface and interface conversion chip Number be WCM2012F2SF-900T04, common-mode filter is for reducing the electromagnetic interference between USB interface and interface conversion chip Signal.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (8)

1. a kind of USB with intelligent parameter display function turns serial port device, for connecting USB interface and serial line interface, serially Interface includes two RS485/422 interfaces, a RS232 interface and a TTL interface, it is characterised in that: described device includes Power supply mechanism, switching mechanism and mechanism for monitoring；

The power supply mechanism includes the overvoltage crowbar being electrically connected according to this, BUCK circuit and power isolation circuit, wherein mistake Voltage protection circuit and the USB interface are electrically connected；

The switching mechanism includes the interface conversion chip, signal isolation unit and level conversion unit being successively electrically connected, and is connect The output end of mouth conversion chip and the USB interface and the BUCK circuit is electrically connected, signal isolation unit and BUCK circuit Output end, the power isolation circuit output end and the TTL interface be electrically connected, level conversion unit and power supply every It is electrically connected from the output end of circuit, the RS485/422 interface and the RS232 interface；

The mechanism for monitoring includes the arm processor and display screen being electrically connected, arm processor and the overvoltage crowbar Output end, the output end of the BUCK circuit, the output end of the power isolation circuit and the interface conversion chip and institute The junction for stating signal isolation unit is electrically connected.

2. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute State the model STM32F750V8T6 of arm processor.

3. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute Stating overvoltage crowbar includes current monitoring chip, the model zxct1009 of current monitoring chip.

4. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute Stating BUCK circuit includes DC decompression converter, the model MP2359 of DC decompression converter.

5. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute Stating power isolation circuit includes voltage isolating chip, the model F0505S-1WRZ of voltage isolating chip.

6. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute State the model FT4232HL of interface conversion chip.

7. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute State signal isolation unit include four the first isolating chips and second isolating chip, four the first isolating chips for realizing Signal isolation, the second isolating chip is for realizing for being electrically isolated, and the model ADUM1201AR of the first isolating chip, second is isolated The model ADUM1200AR of chip.

8. a kind of USB with intelligent parameter display function as described in claim 1 turns serial port device, it is characterised in that: institute Stating level conversion unit includes electrical level transferring chip, and electrical level transferring chip is electrically connected with three groups of driving chips, three groups of driving cores Piece is electrically connected with two RS485/422 interfaces and a RS232 interface respectively, and the quantity of every group of driving chip is Two, the model SN75LBC184D of driving chip.