CN101916505A

CN101916505A - Multi-group serial port data concentrator

Info

Publication number: CN101916505A
Application number: CN 201010237839
Authority: CN
Inventors: 翟雪超; 肖永明; 薛志峰
Original assignee: BEIJING VALEEN LEADING GREEN-BUILDING TECH Co Ltd
Current assignee: BEIJING VALEEN LEADING GREEN-BUILDING TECH Co Ltd
Priority date: 2010-07-23
Filing date: 2010-07-23
Publication date: 2010-12-15
Anticipated expiration: 2030-07-23
Also published as: CN101916505B

Abstract

The invention relates to a multi-group serial port data concentrator comprising a channel input module, a channel output module, a data processing module circuit, a photoelectric isolating module circuit, a power supply isolating module circuit, a serial port expanding module circuit and a level converting module circuit which are sequentially connected, wherein the channel input module comprises a plurality of groups of data exchanging interface terminals and a protection circuit, and the protection circuit is connected with a first level converting circuit and a data exchanging terminal; the channel output module comprises a plurality of groups of data exchanging interface terminals as well as a transient voltage inhibitor and a protection circuit; the serial port expanding module circuit comprises a chip of a serial port communication protocol, a serial port expanding chip can expand a plurality of serial ports by connecting with the data processing module circuit, each group of serial ports have equal priority levels and all have the function of data interrupt; and the level converting module circuit comprises a level converting circuit for a plurality of serial bus communication protocol signals. The multi-group serial port data concentrator has the function of flexible data concentration and can realize the real-time concentration of 16 groups of RS485 communication protocol data.

Description

The multi-group serial port data concentrator

Technical field

The present invention relates to the data concentrator in a kind of commercial measurement field, particularly a kind of multi-group serial port data concentrator of 19 groups of serial ports, these 19 groups of serial ports are gathered concentrator and are used for the building energy consumption data centralization, control of photovoltaic power generation grid-connecting system and data centralization.

Technical background

The direction that the complicated high speed of measuring process forward maximizes develops, along with computer technology, and infotech, the fast development of new and high technologies such as network technology, data centralization is more and more higher in the intelligent degree of the instrument of measuring and control the role.Simultaneously a kind of incessantly by the data of concentrating in a lot of occasions, need to concentrate a plurality of data and the instrument of gathering is monitored, the concentrator of requirement needs hyperchannel.In data concentrator, all adopt singlechip technology to constitute embedded system at present, finish the processing of data, owing to be subjected to single-chip microcomputer performance and technology limitation: the serial ports passage is few, and gathering 16 groups of passages simultaneously needs a plurality of concentrators cooperations to finish to bring the cost height, poor reliability, the later maintenance inconvenience.

Summary of the invention

The objective of the invention is to, by a kind of multi-group serial port data concentrator is provided, the data concentrator that adopts modular combinational circuit to be designed to have 19 groups of serial communication functions, few to change the serial ports passage that exists at present, need a plurality of concentrator cooperations to finish bring expensive, poor reliability, the problem of later maintenance inconvenience.

The present invention adopts following technological means to realize:

To achieve these goals, 19 groups of serial data concentrators of the present invention are achieved in that 19 groups of serial data concentrators comprise passage load module, passage output module, data processing module circuit, photoelectric isolation module circuit, serial ports expansion modular circuit, the level switch module circuit that is communicated with successively; Described passage load module comprises the data exchange interface terminal of 16 groups of RS485 serial bus communication agreements and the holding circuit of being made up of with posistor (PTC thermistor) device Transient Voltage Suppressor (TVS pipe) and overcurrent (overload) protection; this holding circuit links to each other with the data exchange interface terminal with first level shifting circuit; described passage output module comprises 1 group of RS232 and 2 groups of holding circuits that RS485 serial bus communication protocol data is uploaded Interface Terminal and is made up of with posistor (PTC thermistor) device Transient Voltage Suppressor (TVS pipe) and overcurrent (overload) protection; this holding circuit links to each other with the data upload Interface Terminal with second level shifting circuit; described data processing module circuit comprises high-performance of ST Microelectronics; low-power consumption; the little process chip circuit of single-chip microcomputer of inner integrated real-time timepiece chip circuit; described serial ports expansion modular circuit comprises utilizes 4 high-speed synchronous serial communication protocol extended chips to realize the circuit of 16 groups of serial port communicating protocols; 4 serial ports expansion chips link to each other with the data processing module circuit and expand 16 groups of serial ports; every group of serial ports priority equates; every group of serial ports all has the data interruption function; described level switch module circuit comprises 18 MAX13487 and 1 MAX232 chip circuit, and described photoelectric isolation module circuit comprises 38 photoelectric isolated chips.

The present invention compared with prior art has following remarkable advantages and beneficial effect:

Have data centralization function flexibly, can realize that 16 groups of RS485 communications protocol data in real time are concentrated.RS485 communications protocol data centralization, long transmission distance, antijamming capability is strong, is fit to than data centralization under the rugged surroundings.16 groups of RS485 communications protocol ports, every group of RS485 communications protocol port can be to the next stage cascade.16 groups of RS485 data acquisition port prioritys equate that every group of RS485 communications protocol port all has interrupt function.Data concentrator can cascade.

Description of drawings:

Fig. 1 is a logic diagram of the present invention;

Fig. 2 is a serial ports expansion module logical diagram of the present invention;

Fig. 3 is 19 groups of serial port logic figure of the present invention.

Embodiment

Below in conjunction with Figure of description the specific embodiment of the present invention is illustrated.

A kind of 19 groups of serial data concentrator embodiment comprise passage load module 1, the first level signal change-over circuit 2, the first photoelectric isolation module circuit 3, serial ports expansion modular circuit 4, data processing module circuit 5, the second level signal change-over circuit 6, the second photoelectric isolation module circuit 7, the passage output module circuit 8 that connects successively referring to Fig. 1, Fig. 2, Fig. 3, described data concentrator.

Described passage load module 1 comprises the data exchange interface terminal of 16 groups of RS485 communications protocol and the holding circuit of being made up of with posistor (PTC thermistor) device Transient Voltage Suppressor (TVS pipe) and overcurrent (overload) protection, and this holding circuit is connected with the exchanges data terminal with first level shifting circuit 2.

Described passage output module 8 comprises that 1 group of RS232 communications protocol data upload Interface Terminal and holding circuit 81 and 2 groups of RS485 communications protocol data upload Interface Terminals of being made up of with posistor (PTC thermistor) device Transient Voltage Suppressor (TVS pipe) and overcurrent (overload) protection reach the holding circuit of being made up of with posistor (PTC thermistor) device Transient Voltage Suppressor (TVS pipe) and overcurrent (overload) protection 82, and this holding circuit is connected with the data upload Interface Terminal with second level shifting circuit 7.

Described first level shifting circuit 2 comprises 16 groups of MAX13487 chip circuits.

The described first photoelectric isolation module circuit 3 comprises 32 photoelectric isolated chip circuit.

Described data processing module 5 comprises the little process chip circuit of single-chip microcomputer of high-performance of ST Microelectronics, low-power consumption, inner integrated real-time timepiece chip circuit.

Described serial ports expansion modular circuit comprises the

chip circuit

41,42,43,44 that utilizes 4 to realize 16 groups of serial port communicating protocols of high-speed synchronous serial port communication protocol extension, 4 serial ports expansion chips link to each other with the data processing module circuit and can expand 16 serial ports, and each serial ports expansion chip all has interrupt function.

Described second level shifting circuit 6 comprises 2 road MAX13487 and 1 road MAX232 chip circuit.

The described second photoelectric isolation module circuit 7 comprises 6 photoelectric isolated chip circuit.

The described data concentrator of present embodiment comprises passage load module 1, the first level signal change-over circuit 2, the first photoelectric isolation module circuit 3, serial ports expansion modular circuit 4, data processing module 5, the second level signal change-over circuit 6, the second photoelectric isolation module circuit 7, the passage output module 8 that connects successively, adopt unified electrical design standard to place in the same housing, adopt outside direct current 24V input, be treated to each functional module through interior power supply circuit power supply is provided.

It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this instructions has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. a multi-group serial port data concentrator comprises the passage load module that connects successively, passage output module, data processing module circuit, photoelectric isolation module circuit, power isolation module circuit, serial ports expansion modular circuit, level switch module circuit; It is characterized in that:

Described passage load module comprises the data exchange interface terminal of array serial bus communication agreement and the holding circuit of being made up of with PTC thermistor device Transient Voltage Suppressor and overload protection, and this holding circuit is connected with the exchanges data terminal with first level shifting circuit;

Described passage output module comprises the data exchange interface terminal of array serial bus communication agreement and the holding circuit of being made up of with PTC thermistor device Transient Voltage Suppressor and overload protection, and this holding circuit is connected with the data upload Interface Terminal with second level shifting circuit;

Described data processing module circuit comprises the little process chip circuit of single-chip microcomputer;

Described serial ports expansion modular circuit comprises the chip of the serial port communicating protocol of realizing high-speed synchronous serial port communication protocol extension, the serial ports expansion chip links to each other with the data processing module circuit can expand a plurality of serial ports, the priority of every group of serial ports equates that every group of serial ports all has the data interruption function;

Described first, second level switch module circuit comprises multipath serial bus communication protocol signal level shifting circuit.

2. multi-group serial port data concentrator according to claim 1 is characterized in that: described multi-group serial port is 19 groups of serial ports.

3. multi-group serial port data concentrator according to claim 1 is characterized in that: the data exchange interface terminal of the array serial bus communication agreement of described passage load module is 16 groups.

4. multi-group serial port data concentrator according to claim 1 is characterized in that: described passage output module comprises 1 group of RS232 communications protocol and 2 groups of RS485 communications protocol data communication interface terminals and interface protective circuit.

5. multi-group serial port data concentrator according to claim 1 is characterized in that: the chip of described serial port communicating protocol is 4, and this chip links to each other with the data processing module circuit and expands to 16 serial ports.

6. multi-group serial port data concentrator according to claim 1 is characterized in that: described level switch module comprises 18 MAX13487 and 1 MAX232 chip circuit.