CN204440629U - A kind of low-power consumption bus data acquisition device - Google Patents
A kind of low-power consumption bus data acquisition device Download PDFInfo
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- CN204440629U CN204440629U CN201520111527.1U CN201520111527U CN204440629U CN 204440629 U CN204440629 U CN 204440629U CN 201520111527 U CN201520111527 U CN 201520111527U CN 204440629 U CN204440629 U CN 204440629U
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Abstract
The utility model relates to a kind of low-power consumption bus data acquisition device, electronic remote transmission water meter information is collected to data acquisition unit by Modbus data bus, re-use hand-held meter reader from data acquisition unit, read electronic remote transmission water meter information, again information is uploaded to main website, it is characterized in that, comprise MCU control panel, battery, sensor, flash memory, antenna, MCU control panel is core component, MCU control panel is connected with sensor, flash memory, antenna, battery is that MCU control panel is powered, and described MCU control panel is built-in with CC110 radio-frequency module.Advantage is: use single chips just can complete the collection of data, process, transmission and reception, make bus data acquisition device become less, be more convenient for using, more cheap.Various signal can be gathered, the data security collected stably can be sent to intermediate data collection point.
Description
Technical field
The utility model relates to a kind of low-power consumption bus data acquisition device.
Background technology
House remote meter-reading system is the network structure coupled together by channel by remote transmitting water meter, data acquisition unit, hand-held meter reader and main website, by running kilowatt meter reading-out system software, realizes automatic copy reading house water meter.
As a kind of master-slave network Modbus network allow multiple or one communicate from machine with a main frame, wherein response message and command message are corresponding relations, namely adopt order response mode.Main frame is given an order message, and in time receiving the message that main frame is sent, corresponding response message sends and responds command message.Eachly have a unique address in a network from machine, the slave addresses of access is included in the order that main frame sends, to the order of response make response be have this address from machine.
Transmission mode ASCII and RTU is used in Modbus agreement.Parity check bit, 2 off-positions, 8 data bit are not had to be transformats of RTU.Rely on receive intercharacter application time RTU receiving equipment to a frame start judge, after the time is 3 half characters, does not complete frame or does not have new character, this frame can be received equipment and abandon, and the beginning of new frame is to set character late as standard.The information of 1 byte is counted as 8 characters and sends in RTU pattern.And be sent out in ascii mode as two ascii characters.This kind of mode power consumption is excessive, limits the application of Modbus, debugs loaded down with trivial details, and assembling trouble, particularly to non-technical personnel.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this utility model is to provide a kind of low-power consumption bus data acquisition device, realizes automatic copy reading house water meter more reliably.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of low-power consumption bus data acquisition device, electronic remote transmission water meter information is collected to data acquisition unit by Modbus data bus, re-use hand-held meter reader from data acquisition unit, read electronic remote transmission water meter information, again information is uploaded to main website, comprise MCU control panel, battery, sensor, flash memory, antenna, MCU control panel is core component, and MCU control panel is connected with sensor, flash memory, antenna, battery is that MCU control panel is powered, and described MCU control panel is built-in with CC110 radio-frequency module.
Described MCU control panel is CC430F5137.
The Modbus data bus of described electronic remote transmission water meter information under RTU remote data terminal pattern adopts CRC check.
Described MCU control panel is connected with 26MHz crystal oscillator.
Compared with prior art, the beneficial effects of the utility model are:
Use single chips just can complete the collection of data, process, transmission and reception, make bus data acquisition device become less, be more convenient for using, more cheap.Adopt the wireless awakening function of radio-frequency module, when after system request successful connection, will enter wireless awakening pattern, now system is in sleep pattern, achieves the low-power consumption object of collector.Power consumption is extremely low in such a mode, and electric current can be low to 2 μ A.Various signal can be gathered, the data security collected stably can be sent to intermediate data collection point.
Accompanying drawing explanation
Fig. 1 is electronic long-distance transmission kilowatt meter reading-out system structural drawing.
Fig. 2 is Modbus agreement principal and subordinate order-response relation figure.
Fig. 3 is data acquisition device system composition diagram.
Fig. 4 is data acquisition unit circuit theory diagrams.
Fig. 5 is data acquisition flow figure.
Fig. 6 is the data acquisition flow figure under data awakening mode
Embodiment
Below in conjunction with Figure of description, the utility model is described in detail, but it should be noted that enforcement of the present utility model is not limited to following embodiment.
See Fig. 1-Fig. 6, a kind of low-power consumption bus data acquisition device, electronic remote transmission water meter information is collected to data acquisition unit by Modbus data bus, re-use hand-held meter reader from data acquisition unit, read electronic remote transmission water meter information, again information is uploaded to main website, comprise MCU control panel, battery, sensor, flash memory, antenna, MCU control panel is core component, MCU control panel is connected with sensor, flash memory, antenna, battery is that MCU control panel is powered, and described MCU control panel is built-in with CC110 radio-frequency module.
MCU control panel is CC430F5137.The Modbus data bus of electronic remote transmission water meter information under RTU remote data terminal pattern adopts CRC check.
Low-consumption wireless data acquisition unit is that core is formed by CC430F5137 low-power consumption main control MCU control panel, and data acquisition unit is connected with intellectual water meter by bus.After data acquisition unit receives acquisition, first want initialization command frame, the protocol parameter Reseal in the packet received is become between the Modbus Frame of standard ability and intellectual water meter and carry out data transmission.According to Modbus agreement and frame format, address bit is the address code of the intellectual water meter that will gather.Data bit be difference according to acquisition parameter and select different register addresss and want shared by image data register parameters.What the Modbus agreement under RTU pattern adopted is CRC check.No matter message has no parity, all performs this verification, calculates the value of CRC, and be attached to the end of message according to the order of high byte after first low byte during initialization command frame.
When water meter receives accurately after command frame, can return corresponding response frame at once, collector starts the reception of Frame.In the process of data frame receipt, may occur that the register of stored data bit does not receive the situation of data or receive time-out, at this moment whether data are had by according to the data bit of the Modbus agreement acknowledgement frame received, namely receive buffer register in a program from the 3rd, whether have data to judge the integrality of data frame receipt.And utilize the on off state of timer to control receiving course, to guarantee the real-time received.Data acquisition unit, after successfully receiving response frame, carries out the parsing of agreement to it.First read acknowledgement frame from reception buffer zone, therefrom extract address bit, function code and CRC check code, judge it.When address bit, function code and check code are all accurate, show to have received correct data frame, the data that will gather can be read from the data bit of Frame.When reading data, also according to the data storage method of configuration and large small end mode, the concrete storage mode of data to be differentiated.
See Fig. 3, Fig. 4, the power supply voltage range of CC430F1537 is 1.8 ~ 3.6V, coordinates the setting of software farthest can reduce power consumption.The key component of system is that radio frequency sends the Anneta module utilizing a radio frequency, can ensure the stability of radio communication, and this wireless module is accessed by RF_N and RF_P two pins of chip.In addition according to the needs that radio frequency sends, access a 26MHz crystal oscillator.
P1.5, P1.6, P1.7 pin of CC430F5137 may be used for serial communication and communicates with SPI, use these three pins as AccessPort, P1.1, P1.2, P1.3 pin may be used for SPI and communicates with iic bus in addition, and these three interfaces are used for the chip of reserved connecting sensor.
In the design process of node system software, several important register is configured, the register be mainly configured has carrier frequency register, data rate register, carrier sense arranges absolute threshold register, radio frequency send and receive data packet length register and address detected open register.The register of SmartRF Studio 7 couples of CC430F5137 is adopted to be configured.The carrier frequency that configuration radio frequency sends is 433MHz, and the data rate of communication is 2.4kbps.And enable address detected function, each node has unique address.When the content do not had in the packet that node receives and Self address matches, then node device would not accept this packet, does not deal with it.When the packet only sent is corresponding with node address, node could receive and process data, and this just effectively prevents repeater node can be received by multiple node when different nodes sends data, effectively can transmit data, see Fig. 5.
When system one powers on, then can do corresponding initialization operation, such as serial ports, iic bus, and each register of radio frequency module is configured, initialization power Watch with magnifier etc.
After system initialization, system initiatively can initiate connection request to repeater node, tells repeater node the node address of oneself, for the data transmission between later repeater node and terminal node is prepared.After the request that sends connects, node can wait for the response of repeater node, if not response, node can continue request and connect, until carrying out next step process after receiving response.
In order to better reduce system capacity consumption, adopt the wireless module arousal function (WOR) of CC1101 radio-frequency module, when after system request successful connection, will enter wireless awakening pattern, now system is in sleep state.Power consumption is extremely low in such a mode, can reach 2.0 μ A.Radio frequency kernel can be arranged by software programming and wake up at set intervals, after waking up, system is in radio frequency reception state, if at this moment detected that Packet Generation is come, so system will exit wireless awakening state, proceeds to normal state and goes to process the packet received.If packet do not detected, system then can continue sleep and then detection of repeatedly waking up, and this ensures that theres when not needing data to transmit, and conserve energy effect consumption, is shown in Fig. 6 to greatest extent.
The embedded radio-frequency module of CC430F5137 has clear channel assessment (CCA) (CCA) function, when opening clear channel assessment (CCA) function, only just transmission state can be entered when channel idle, if channel busy detected, then accepting state can be remained on always.
Send the accuracy of data to repeater node in order to ensure this node, and the anti-interference improved when multiple interruption node sends data to repeater node simultaneously, adopt the carrier sense function of radio-frequency module, and be combined clear channel assessment (CCA) function and improve radio frequency and send function.
Poll is the common method of systematic collection data.In the wireless network, non-leader cluster node is subject to the restriction of power consumption, and except uploading data, other times all can be in dormant state.In order to ensure to shake hands and communicate successfully, leader cluster node can increase the inquiry number of times of each terminal node in communication range, causes the time resting on single node elongated.Suppose that acquisition node A and F at a time wakes up simultaneously, traditional polling mechanism is after A point uploading data completes, and F point needs the poll time going through B, C, D, E4 node just can communicate.The poll of system to terminal node is separated with data-transformation facility, find during poll node that a certain node needs to communicate, by the module of this node information notification data acquisition, be responsible for after the module of data acquisition receives information, carrying out exchanges data with this node immediately.Leader cluster node, while carrying out data communication, also carries out poll.If before the communication of A node data completes, poll has found that F node data needs transmission, then system is after completing the exchange of A node data, can carry out the communication of F node at once.This communication scheme mode will improve the efficiency of reading and looking for Operation Status Equipment node.When there is the larger single node of data especially in systems in which, advantage can be more obvious.Therefore data collection station adopts active call handshake method to reduce power consumption further.The poller module of data reader once can monitor simultaneously and reduce the handshake of 6 terminals polling cycle, decrease shaking hands the stand-by period of terminal.In program design, rationality design wireless module each unit data transmission time interval length, system sleep and wake up, optimization system clock and work schedule, reduced instruction be the effective ways reducing equipment power dissipation.
Adopt the intellectual water meter low power consumption data collector of Modbus agreement, inside is integrated with the MCU control panel of radio frequency core, and built-in CC1101 radio-frequency module, use single chips just can realize the collection of intellectual water meter data, process, transmission and reception, thus make data acquisition unit become less, more convenient, more cheap.System have employed the wireless awakening function of radio-frequency module, significantly reduces system power dissipation, and electric current can be low to 2 μ A.In system, carrier sense function and channel idle evaluation function can be optimized radio frequency and send function, effectively can improve interference free performance when multiple node sends data simultaneously.
Design of System Software adopts event polling mechanism, and after each module initialization, system just enters low power mode of operation automatically.When networking signal waken system, start to enter interrupt processing pattern, continue to enter low power mode of operation after information processing terminates, this software architecture greatly can reduce system power dissipation.
Claims (4)
1. a low-power consumption bus data acquisition device, electronic remote transmission water meter information is collected to data acquisition unit by Modbus data bus, re-use hand-held meter reader from data acquisition unit, read electronic remote transmission water meter information, again information is uploaded to main website, it is characterized in that, comprise MCU control panel, battery, sensor, flash memory, antenna, MCU control panel is core component, MCU control panel is connected with sensor, flash memory, antenna, battery is that MCU control panel is powered, and described MCU control panel is built-in with CC110 radio-frequency module.
2. a kind of low-power consumption bus data acquisition device according to claim 1, it is characterized in that, described MCU control panel is CC430F5137.
3. a kind of low-power consumption bus data acquisition device according to claim 1, is characterized in that, the Modbus data bus of described electronic remote transmission water meter information under RTU remote data terminal pattern adopts CRC check.
4. a kind of low-power consumption bus data acquisition device according to claim 1, is characterized in that, described MCU control panel is connected with 26MHz crystal oscillator.
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| CN201520111527.1U CN204440629U (en) | 2015-02-16 | 2015-02-16 | A kind of low-power consumption bus data acquisition device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023568A (en) * | 2016-08-09 | 2016-10-12 | 大连理工大学 | Intelligent meter reading control system and method |
| CN106205098A (en) * | 2016-08-30 | 2016-12-07 | 广东柯内特环境科技有限公司 | Environment Internet of Things data acquisition transmission terminal |
| CN108036718A (en) * | 2018-02-02 | 2018-05-15 | 中国民用航空飞行学院 | A kind of tablet planeness detection system and its method |
| CN109448349A (en) * | 2018-11-22 | 2019-03-08 | 广州南湾信息科技有限公司 | A kind of hydrological telemetering equipment |
-
2015
- 2015-02-16 CN CN201520111527.1U patent/CN204440629U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023568A (en) * | 2016-08-09 | 2016-10-12 | 大连理工大学 | Intelligent meter reading control system and method |
| CN106205098A (en) * | 2016-08-30 | 2016-12-07 | 广东柯内特环境科技有限公司 | Environment Internet of Things data acquisition transmission terminal |
| CN108036718A (en) * | 2018-02-02 | 2018-05-15 | 中国民用航空飞行学院 | A kind of tablet planeness detection system and its method |
| CN109448349A (en) * | 2018-11-22 | 2019-03-08 | 广州南湾信息科技有限公司 | A kind of hydrological telemetering equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161222 Address after: 114000 Liaoning province Anshan laser hi tech Zone Industrial Park North Park No. 7 Building 3 layer Patentee after: LIAONING XIN HONG YUAN SCIENCE AND TECHNOLOGY CO.,LTD. Address before: 114000 Anshan province Liaoning City Tiedong District 51 Road No. 26 building 28 room 290 Silong Patentee before: Wu Jingxin |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20220216 |