CN101908993A - Signal short-distance wireless transmission instrument based on CAN protocol - Google Patents
Signal short-distance wireless transmission instrument based on CAN protocol Download PDFInfo
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- CN101908993A CN101908993A CN 201010248872 CN201010248872A CN101908993A CN 101908993 A CN101908993 A CN 101908993A CN 201010248872 CN201010248872 CN 201010248872 CN 201010248872 A CN201010248872 A CN 201010248872A CN 101908993 A CN101908993 A CN 101908993A
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Abstract
The invention discloses a signal short-distance wireless transmission instrument based on a CAN (Controller Area Network) protocol, comprising a singlechip, a CAN bus control chip, a CAN bus transceiver chip, a wireless chip, a radio-frequency antenna and a power supply module. The power supply module is respectively and electrically connected with the singlechip, the CAN bus control chip, the CAN bus transceiver chip, the wireless chip and the radio-frequency antenna; the CAN bus control chip is respectively connected with the singlechip and the CAN bus transceiver chip; and the wireless chip is respectively connected with the singlechip and the radio-frequency antenna. The invention firstly realizes the short-distance wireless transmission of a CAN bus signal, has the advantages of simple structure, high data wireless transmission speed, reliable signal transmission, and the like and can be accessed in a wireless local network so as to realize that the signals between the CAN bus and the Ethernet based on TCP/IP are shared and transmitted.
Description
Technical field
The present invention relates to a kind of short distance CAN signal wireless transmission instrument, be based on the network control of CAN industrial field bus, mainly is the short range wireless transmission that is used for the CAN bus signals.
Background technology
The transmission of the industrial bus CAN signal of now using all is to realize with twisted-pair feeder, can't satisfy the CAN bus transfer under mobile industrial equipment and the adverse circumstances.
Summary of the invention
The shortcoming that to the objective of the invention is at present CAN communication all be wire transmission provides a kind of signal short-distance wireless transmission instrument based on the CAN agreement.
For achieving the above object, the technical solution that the present invention taked is: should comprise single-chip microcomputer, CAN bus control chip, CAN bus transceiving chip, wireless chip, radio-frequency antenna and power module based on the signal short-distance wireless transmission instrument of CAN agreement, described power module is electrically connected with single-chip microcomputer, CAN bus control chip, CAN bus transceiving chip, wireless chip and radio-frequency antenna respectively, CAN bus control chip is connected with CAN bus transceiving chip with single-chip microcomputer respectively, and wireless chip is connected with radio-frequency antenna with single-chip microcomputer respectively.
Further, the present invention also comprises indicating module, and indicating module is connected with power module with single-chip microcomputer respectively.
Further, wireless chip of the present invention is the wireless chip based on the IEEE802.11b/g agreement.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention has realized the short range wireless transmission of CAN bus signals first.(2) structure of the present invention is modularized design, has advantages such as simple in structure, that the data wireless transmission speed fast, the signal transmission is reliable.(3) the present invention can search mistake in the signal transmission easily by using indicating module.(4) instrument of the present invention is owing to can adopt the most frequently used wireless network based on the IEEE802.11b/g agreement of present local area network (LAN), therefore this instrument WLAN (wireless local area network) be can be inserted, thereby CAN bus and sharing and transmission realized based on signal between the Ethernet of TCP/IP.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the circuit theory diagrams of single-chip microcomputer of the present invention.
Fig. 3 is the circuit theory diagrams of wireless communication module of the present invention.
Fig. 4 is the circuit theory diagrams of CAN bus communication module of the present invention.
Fig. 5 is the circuit theory diagrams of LED indicating module of the present invention.
Embodiment
The signal short-distance wireless transmission instrument that the present invention is based on the CAN agreement comprises four modules: top control module, wireless communication module, CAN communication module and power module.As shown in Figure 1, wherein, single-chip microcomputer 1 is a top control module, forms the CAN bus communication module by CAN bus control chip 2 and CAN bus transceiving chip 3, form wireless communication module by wireless chip 4 and radio-frequency antenna 5, power module 6 is above-mentioned each module for power supply separately.
As shown in Figure 1, power module 6 is electrically connected with single-chip microcomputer 1, CAN bus control chip 2, CAN bus transceiving chip 3, wireless chip 4 and radio-frequency antenna 5 respectively, CAN bus control chip 2 is connected with CAN bus transceiving chip 3 with single-chip microcomputer 1 respectively, and wireless chip 4 is connected with radio-frequency antenna 5 with single-chip microcomputer 1 respectively.
For showing easily and searching mistake in the signal transmission, instrument of the present invention can also comprise indicating module 7 as shown in Figure 1, and indicating module 7 is connected with power module 6 with single-chip microcomputer 1 respectively.
As one embodiment of the present invention, single-chip microcomputer 1 can be selected the chip ATMEGA16L of the AVR series of atmel corp for use, also can select the chip of arm7 or arm9 type for use.CAN bus control chip 2 and CAN bus transceiving chip 3 can be selected the CAN bus control chip SJA1000 and the CAN bus transceiving chip 82C250 of PHILIPS Co. respectively for use, and also optional usefulness has the product of other models of function of the same race.
The frequency range of radio-frequency antenna 5 is identical with wireless chip 4 transmit frequency ranges.Power module 6 is selected for use can provide the regular tap of 5V and 24V power supply to get final product.Indicating module 7 can adopt common LED light, and single-chip microcomputer 1 links to each other to finish the deixis of meter status with indicating module 7 by the I/O mouth.
As shown in Figure 2, the ATMEGA16L single-chip microcomputer is a top control module of the present invention, the ATMEGA16L single-chip microcomputer links to each other with CAN bus control chip SJA1000 and wireless telecommunications chip STLC4550 respectively by the I/O input/output port, thus, the transmission of ATMEGA16L Single-chip Controlling CAN communication signal and wireless communication signal.
As shown in Figure 3, wireless chip STLC4550 based on the IEEE802.11b/g agreement realizes communication by spi bus and single-chip microcomputer 1, radio-frequency antenna 5 is installed on wireless chip STLC4550 again simultaneously wireless signal transmission is gone out, to realize the radio transmission of CAN signal.Because used the wireless chip STLC4550 based on the IEEE802.11b/g agreement, instrument of the present invention can be linked in the WLAN (wireless local area network), thereby realize CAN bus and sharing and transmission based on signal between the Ethernet of TCP/IP.
As shown in Figure 4, CAN bus control chip SJA1000 is connected with CAN bus transceiving chip 82C250 with single chip computer AT MEGA16L respectively, thereby has realized reception, processing and the transmission of CAN communication signal.
In conjunction with Fig. 2 and Fig. 5 as can be known, because the I/O mouth of ATMEGA16L single-chip microcomputer is limited, indicate present communication state so utilize latch chip 74ALS573 that the I/O mouth is drawn with each indicator light of control indicating module 7.
As shown in Figure 1, in order to realize the CAN wireless transmission of signal, when the present invention is based on the signal short-distance wireless transmission instrument work of CAN agreement, at first, the CAN communication data is received by CAN bus transceiving chip 82C250, sends on the single chip computer AT MEGA16L chip after handling through CAN bus control chip SJA1000 then; Single chip computer AT MEGA16L chip sends to wireless chip STLC4550 after the CAN conversion of signals is become wireless signal, and wireless chip STLC4550 sends signal through radio-frequency antenna again, thereby realizes the short range wireless transmission of CAN signal.If indicating module 7 is provided with three indicator lights, each indicator light is by the output signal control of singlechip chip ATMEGA16L, then can be respectively applied for power-up state, CAN communication receiving/transmission state, the wireless telecommunications reiving/transmitting state of indication wireless transmission instrument of the present invention, to show easily and to search mistake in the signal transmission.
Claims (3)
1. signal short-distance wireless transmission instrument based on the CAN agreement, it is characterized in that: comprise single-chip microcomputer (1), CAN bus control chip (2), CAN bus transceiving chip (3), wireless chip (4), radio-frequency antenna (5) and power module (6), described power module (6) respectively with single-chip microcomputer (1), CAN bus control chip (2), CAN bus transceiving chip (3), wireless chip (4) and radio-frequency antenna (5) are electrically connected, CAN bus control chip (2) is connected with CAN bus transceiving chip (3) with single-chip microcomputer (1) respectively, and wireless chip (4) is connected with radio-frequency antenna (5) with single-chip microcomputer (1) respectively.
2. the signal short-distance wireless transmission instrument based on the CAN agreement according to claim 1 is characterized in that: also comprise indicating module (7), described indicating module (7) is connected with power module (6) with single-chip microcomputer (1) respectively.
3. the signal short-distance wireless transmission instrument based on the CAN agreement according to claim 1 and 2 is characterized in that: described wireless chip (4) is the wireless chip based on the IEEE802.11b/g agreement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010248872 CN101908993A (en) | 2010-08-06 | 2010-08-06 | Signal short-distance wireless transmission instrument based on CAN protocol |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010248872 CN101908993A (en) | 2010-08-06 | 2010-08-06 | Signal short-distance wireless transmission instrument based on CAN protocol |
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| CN101908993A true CN101908993A (en) | 2010-12-08 |
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| CN 201010248872 Pending CN101908993A (en) | 2010-08-06 | 2010-08-06 | Signal short-distance wireless transmission instrument based on CAN protocol |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533793A (en) * | 2016-12-12 | 2017-03-22 | 深圳市瑞凌实业股份有限公司 | CAN protocol based communication method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017601A (en) * | 2006-12-08 | 2007-08-15 | 天津大学 | A system used for electric-controlled vehicle radio remote monitoring, marking and failure diagnosis |
| CN101114165A (en) * | 2007-07-12 | 2008-01-30 | 上海交通大学 | Two-way CAN bus vehicle mounted remote communicating and satellite positioning system |
| CN201289680Y (en) * | 2008-09-25 | 2009-08-12 | 裴守龙 | Intelligent remote-control device using CAN bus system |
| CN201839305U (en) * | 2010-08-06 | 2011-05-18 | 浙江大学 | Signal short-range wireless transmission instrument based on CAN agreement |
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2010
- 2010-08-06 CN CN 201010248872 patent/CN101908993A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017601A (en) * | 2006-12-08 | 2007-08-15 | 天津大学 | A system used for electric-controlled vehicle radio remote monitoring, marking and failure diagnosis |
| CN101114165A (en) * | 2007-07-12 | 2008-01-30 | 上海交通大学 | Two-way CAN bus vehicle mounted remote communicating and satellite positioning system |
| CN201289680Y (en) * | 2008-09-25 | 2009-08-12 | 裴守龙 | Intelligent remote-control device using CAN bus system |
| CN201839305U (en) * | 2010-08-06 | 2011-05-18 | 浙江大学 | Signal short-range wireless transmission instrument based on CAN agreement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533793A (en) * | 2016-12-12 | 2017-03-22 | 深圳市瑞凌实业股份有限公司 | CAN protocol based communication method and system |
| CN106533793B (en) * | 2016-12-12 | 2019-08-20 | 深圳市瑞凌实业股份有限公司 | Communication means and system based on CAN protocol |
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Application publication date: 20101208 |