CN202818362U - HART modem base on WiFi protocol - Google Patents
HART modem base on WiFi protocol Download PDFInfo
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- CN202818362U CN202818362U CN 201220524438 CN201220524438U CN202818362U CN 202818362 U CN202818362 U CN 202818362U CN 201220524438 CN201220524438 CN 201220524438 CN 201220524438 U CN201220524438 U CN 201220524438U CN 202818362 U CN202818362 U CN 202818362U
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Abstract
The utility model relates to an HART modem base on a WiFi protocol. The utility model comprises a WiFi module, a one-chip microcomputer, a signal selector, a HART transition chip, and a power supply management module. The WiFi module is bidirectionally connected with a corresponding port of the one-chip microcomputer. The HART transition chip is connected with a corresponding output terminal of the one-chip microcomputer through the signal selector. The signal selector is bidirectionally connected with the HART transition chip. The power supply management module is respectively connected with the HART transition chip and a corresponding input terminal of the one-chip microcomputer. According to the utility model, a relatively stable and rapid device is provided for the management of internal intelligent instruments of a factory, thereby saving the cost for building a new wired communication network in the earlier stage and for maintaining the wired communication network in the later stage, realizing the free sharing of network resources and the remote real-time management of instrument data, and substantially saving the resource cost.
Description
Technical field
The utility model relates to a kind of Hart modulator-demodulator based on the WiFi agreement.
Background technology
HART (Highway Addressable Remote Transducer), the open communication agreement of highway addressable remote transducer is U.S. Rosement company released in 1985 a kind of for the communication protocol between field intelligent instrument and the control room equipment.The HART device provides has relatively low bandwidth, and the communication of appropriateness response time through the development in twenties years, has become a de facto standards in process automation field, and increasing intelligence instrument is supported the HART agreement.It is a kind of short range wireless transmission technology for WiFi, can support the radio signal of the Internet access in the hundreds of feet scope.Utilize the WiFi technology, can effectively simplify the communication between the various mobile communication terminal equipments, thereby make the transfer of data between these modern communications equipments and the internet become efficient more rapidly.
The HART modulator-demodulator is as the key equipment of HART field apparatus and other equipment interactive information of client, and its employed communication modes directly affects the equipment result of use.At present, the HART modulator-demodulator of domestic main flow is wired generally provides RS232 standard serial port interface, and wireless access technology generally has blue tooth interface, zigbee, WiFi interface.These three kinds of interfacings belong to the 2.4G technology, and the bluetooth main feature is that distance is shorter, generally is no more than 10 meters distance, not too is fit to be applied to industrial networking demand.Zigbee compares with the Wifi technology, and the application of Wifi is more mature and stable, although that Zigbee has long transmission range is far away, transmission bandwidth is well below WIFI.And along with the wireless penetration of inside plants supervising the network, the popularizing of WiFi wireless network, Zigbee is easy to be subject to the interference of external environment.When connecting on-the-spot HART equipment, existing all kinds of HART modulation /demodulation modules only provide the ability of one tunnel connection signal, and the on-the-spot a certain measuring point of typical industry generally comprises temperature, pressure, three kinds of signals of flow signal.
Use the wireless communication modules such as GPRS module or CDMA module then to need to pay the network operation expense, the running cost of generation often is difficult to allow the user accept.
The utility model content
Technical problem to be solved in the utility model provides a kind of reasonable in design, and is simple in structure, the Hart modulator-demodulator based on the WiFi agreement that equipment cost is lower.
The utility model adopts following technical scheme:
The utility model is comprised of WIFI module, single-chip microcomputer, signal selector, HART conversion chip and power management module, described WIFI module is connected with the corresponding port of single-chip microcomputer is two-way, described HART conversion chip is connected with the corresponding output end of single-chip microcomputer by signal selector, described signal selector is connected with the HART conversion chip is two-way, and described power management module is connected with the respective input of HART conversion chip, single-chip microcomputer respectively.
Be provided with the RS232 conversion chip on the described single-chip microcomputer, its model is Max3226.
The model of described WIFI module is OS-WF-01.
The model of described single-chip microcomputer is S3C6410.
The model of described signal selector is OS-SIN-01.
The model of described HART conversion chip is A5191.
The model of described power management module is 7033Q.
Good effect of the present utility model is as follows:
The utility model can be the management of inside plants intelligence instrument and provides a kind of comparatively stable, fast device, set up separately the expense of wire communication network and wired maintenance of later stage thereby save early stage, realize that Internet resources are freely shared and the long-distance real-time management of instrumented data, greatly saving resource cost.
Description of drawings
Accompanying drawing 1 is the utility model structural representation.
Accompanying drawing 2 is the utility model workflow diagram.
Accompanying drawing 3 is the utility model communication succession figure.
Embodiment
Shown in accompanying drawing 1,2, the utility model is comprised of WIFI module 2, single-chip microcomputer 3, signal selector 4, HART conversion chip 5 and power management module 6, described WIFI module 2 is connected with the corresponding port of single-chip microcomputer 3 is two-way, described HART conversion chip 5 is connected by the corresponding output end of signal selector 4 with single-chip microcomputer 3, described signal selector 4 and 5 two-way connections of HART conversion chip, described power management module 6 are connected with the respective input of HART conversion chip 5, single-chip microcomputer 3 respectively.Be provided with the RS232 conversion chip on the wherein said single-chip microcomputer 3, its model is Max3226, and the model of WIFI module 2 described in the utility model is that the model of OS-WF-01, single-chip microcomputer 3 is that the model of S3C6410, signal selector 4 is that the model of OS-SIN-01, HART conversion chip 5 is that the model of A5191, power management module 6 is 7033Q.
Single-chip microcomputer adopts the S3C6410 nucleus module, is used for supervisory signal to select distribution module, and the WiFi communication module, and will send at the signal that UART receives on WiFi module or other the UART.
Signal acquisition module is responsible for the various signals that the collection site smart machine sends, and acquisition module is divided into three the tunnel, and each road can gather the signal of an equipment.
Signal is selected distribution module, is responsible for and the control signal that receives CPU, and the work of control signal acquisition module.
Signal processing module mainly is divided into signal amplification unit and filter unit.Signal amplification unit amplifies the signal that inputs or outputs, and filter unit carries out filtering to the signal that inputs or outputs to be processed.
The RS232 modular converter is responsible for carrying out communication with CPU, and 9 needle serial port interfaces of standard externally is provided.
Power management module, power management part be mainly by power management chip, power supply switch circuit, and charging circuit three parts form.Power management can be accepted powered battery, two kinds of external power source, supply power voltage 5V.The power management part outputs to the chip of CPU, signal processing module and the power input of WiFi module with power supply;
The WiFi module provides wireless communication function, realizes the core component of wireless telecommunications, and it is by SDIO and CPU interconnection.To realizing that with the outside SOCKET is connected or the virtual serial port connection provides physical support.
Wherein, CPU is S3C6410, and the HART conversion chip adopts A5191, and power management chip adopts CN3052A, and 7033Q is adopted in the power supply voltage stabilizing, and 232 conversion chips are Max3226, and the WiFi module is for supporting the wireless universal module of SDIO interface.
Operation principle of the present utility model is:
At first send via distance host 1 and require signal, signal imports single-chip microcomputer 3 into through 2 conversions of WIFI module, single-chip microcomputer 3 resolve command, comprise standard HART protocol contents and telecommunication agreement packet data in the order, CPU resolves two parts data, according to the content of resolving, content operates selected cell, select a certain road of collection in worksite module to carry out work, simultaneously standard HART protocol data signal section is sent into the A5191 chip by the UART interface of CPU, the A5191 chip carries out digital-to-analogue conversion to the data that receive to be processed, and sends the data to the collection in worksite module, and acquisition module sends to terminal intelligent instrument 7 with data; Then equipment enters the time-delay wait state, when acquisition module had the new data response, sample circuit carried out collection signal, and signal form is 1200HZ or 2200HZ sine wave signal, by processing unit signal is amplified shaping filter again, by the A5191 collection signal and will process after digital signal put into UART, accepted by CPU, behind the CPU receive data, to the data processing of packing, add communication apparatus information, and import data into the WIFI module, be sent to remote terminal by the WiFi module.
Product of the present utility model, its hardware circuit adopts S3C6410CPU as system central processor, configuration 128MDDR internal memory, 2G NAND FLASH storage card, software systems adopt the Linux-2.6.36 platform, management system is the OS-HART long-distance management system, is responsible for the control of whole system and the processing of information, and system possesses data W EB issuing function simultaneously.Utilize the communication of the upper UART1 realization of Cpu and A5191 chip, the sequential of wherein managing the A5191 communication with the XURTSNO pin, sequential chart is as shown in Figure 3.
CPU utilizes SDIO interface and WIFI module, utilizes the function of LINUX system to realize the WIFI module is realized management.
The design of systems soft ware mainly comprises the maintenance of communication link, and the parsing of data receives, and sends.Comprise that also data communication device crosses the WEB form, realize remote management capability.Data link mainly comprises dual mode, and a kind of is the Socket connected mode, and a kind of is the connected mode of virtual serial port.The Socket connected mode makes whole hardware device operate in client mode.Simultaneity factor also can store software with textual form.
Power unit, power supply are realized the conversion of powered battery and externally fed by the characteristic of TP2502.Powered battery realizes Charge Management by CN3052C.Provide stable DC voltage by power supply chip 7233Q, it is stabilized in 3.3V with externally fed or powered battery, and power supply is offered the A5191 chip, and A5191 chip reference voltage is provided by LM285.
Amplifying circuit, filter circuit, it is right to be mainly used to, the signal of the instrument that receives amplifies and filtering, filter circuit is comprised of the resistance capacitance of some preset parameters, amplifying circuit is mainly finished with 2252A, and signal is finished amplification filtering and obtained purer signal, and purified signal is input to A5191.
In the selection of input/output signal, select the transistor of 8050 and 8550 pairings, by the RTS pin transistor is controlled, according to upper figure sequential, finish the reception of data, and transmission work.In the selection of data channel, select three transistors 9012 as switching tube, realize the selection of communication channel, so just solved the problem that multichannel is used.
Claims (7)
1. Hart modulator-demodulator based on the WiFi agreement, it is characterized in that it is by WIFI module (2), single-chip microcomputer (3), signal selector (4), HART conversion chip (5) and power management module (6) form, the two-way connection of corresponding port of described WIFI module (2) and single-chip microcomputer (3), described HART conversion chip (5) is connected by the corresponding output end of signal selector (4) with single-chip microcomputer (3), described signal selector (4) and two-way connection of HART conversion chip (5), described power management module (6) respectively with HART conversion chip (5), the respective input of single-chip microcomputer (3) is connected.
2. a kind of Hart modulator-demodulator based on the WiFi agreement according to claim 1 is characterized in that being provided with the RS232 conversion chip on the described single-chip microcomputer (3), and its model is Max3226.
3. a kind of Hart modulator-demodulator based on the WiFi agreement according to claim 2, the model that it is characterized in that described WIFI module (2) is OS-WF-01.
4. a kind of Hart modulator-demodulator based on the WiFi agreement according to claim 3, the model that it is characterized in that described single-chip microcomputer (3) is S3C6410.
5. a kind of Hart modulator-demodulator based on the WiFi agreement according to claim 4, the model that it is characterized in that described signal selector (4) is OS-SIN-01.
6. a kind of Hart modulator-demodulator based on the WiFi agreement according to claim 5, the model that it is characterized in that described HART conversion chip (5) is A5191.
7. a kind of Hart modulator-demodulator based on the WiFi agreement according to claim 6, the model that it is characterized in that described power management module (6) is 7033Q.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524438 CN202818362U (en) | 2012-10-15 | 2012-10-15 | HART modem base on WiFi protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524438 CN202818362U (en) | 2012-10-15 | 2012-10-15 | HART modem base on WiFi protocol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818362U true CN202818362U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220524438 Expired - Fee Related CN202818362U (en) | 2012-10-15 | 2012-10-15 | HART modem base on WiFi protocol |
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| CN (1) | CN202818362U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451321A (en) * | 2015-12-01 | 2016-03-30 | 小米科技有限责任公司 | Method, apparatus and device for improving WIFI signal strength |
-
2012
- 2012-10-15 CN CN 201220524438 patent/CN202818362U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451321A (en) * | 2015-12-01 | 2016-03-30 | 小米科技有限责任公司 | Method, apparatus and device for improving WIFI signal strength |
| CN105451321B (en) * | 2015-12-01 | 2019-06-04 | 小米科技有限责任公司 | Promote the method, device and equipment of WIFI signal intensity |
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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: 20130320 Termination date: 20161015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |