技术领域technical field
本发明属于无线通信技术领域，涉及一种低功耗无线通信模块，特别是一种工作在510MHz频段的低功耗无线通信模块。The invention belongs to the technical field of wireless communication, and relates to a low-power wireless communication module, in particular to a low-power wireless communication module working in the 510MHz frequency band.
背景技术Background technique
无线通信是利用电磁波信号可以在空中自由传播的特性进行信息交换的一种通信方式，在近些年的通信领域中，无线通信技术是发展最快、应用最关的现代通信技术。现在，随着无线通信技术的飞速发展，无线通信技术已经广泛应用在商务、军事、工控等各大领域。Wireless communication is a communication method that uses the characteristics that electromagnetic wave signals can freely propagate in the air to exchange information. In the field of communication in recent years, wireless communication technology is the fastest-growing and most relevant modern communication technology. Now, with the rapid development of wireless communication technology, wireless communication technology has been widely used in business, military, industrial control and other fields.
随着各种技术的高速发展，无线通信模块应用于各种网络进行数据传输。人们对无线通信的要求越来越高，长距离、便捷、低功耗的无线通信技术正在引起越来越多的关注。With the rapid development of various technologies, wireless communication modules are applied to various networks for data transmission. People have higher and higher requirements for wireless communication, and wireless communication technology with long distance, convenience and low power consumption is attracting more and more attention.
无线通信模块能量受到限制，因为无线通信模块大部分是采用电池供电，无线通信模块一般被布置在环境比较恶劣、无人值守区域，供电电池耗尽后无法及时更换，导致无线通信模块不在工作，将会影响到我们的使用。因此，低功耗是无线传感器网络最重要的设计准则之一。如何降低无线通信模块的功耗是我们现在重要研究的内容。无线通信模块是构建其他无线通信网络的硬件基础，它的功耗至关重要。The energy of the wireless communication module is limited, because most of the wireless communication modules are powered by batteries, and the wireless communication modules are generally placed in harsh environments and unattended areas. After the power supply battery is exhausted, it cannot be replaced in time, resulting in the wireless communication module not working. Will affect our use. Therefore, low power consumption is one of the most important design criteria for wireless sensor networks. How to reduce the power consumption of the wireless communication module is our important research content now. The wireless communication module is the hardware basis for constructing other wireless communication networks, and its power consumption is very important.
发明内容Contents of the invention
有鉴于此，本发明的目的在于提供一种支持IEEE802.15.4g标准的510MHz无线低功耗通信模块，以MSP430F5529单片机和CC1200射频芯片分别作为处理器模块和射频通信模块，能够实现通信模块的低功耗、发射功率、频率偏移、传输通信距离、可靠性通信、接收灵敏度、抗干扰性、发射中心频率的误差容限、接收机期望信号的最大输入电平和误差矢量幅值等方面的一系列技术指标的选择。In view of this, the purpose of the present invention is to provide a 510MHz wireless low-power communication module supporting the IEEE802.15.4g standard, using the MSP430F5529 single-chip microcomputer and the CC1200 radio frequency chip as the processor module and the radio frequency communication module respectively, so that the low power consumption of the communication module can be realized. Power consumption, transmission power, frequency offset, transmission communication distance, reliability communication, reception sensitivity, anti-interference, error tolerance of transmission center frequency, maximum input level of receiver expected signal and error vector magnitude, etc. Selection of series technical indicators.
为达到上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种支持IEEE802.15.4g标准的510MHz无线低功耗通信模块，包括无线发送模块和无线接收模块；A 510MHz wireless low-power communication module supporting the IEEE802.15.4g standard, including a wireless sending module and a wireless receiving module;
所述无线发送模块包括：微控制器模块、射频模块、电源模块、下载口模块、通信接口、数模转换器、低通滤波器、正交混合器、功率放大器、阻抗匹配电路和天线；所述微控制器模块获取数据，数据经解析处理后通过通信接口发送给射频模块中的数字发送器，生成调制信号，然后送入数模转换器形成模拟调制信号，通过低通滤波器减少高频干扰，再通过正交混合器将模拟调制信号与载波信号叠加调制到510MHz射频频段，信号传递给功率放大器后，通过负载阻抗为50Ω的阻抗匹配电路，最后经过工作频段为510MHz，增益为3.5dbi的全向天线以电磁波的形式发射信号；The wireless transmission module includes: a microcontroller module, a radio frequency module, a power supply module, a download port module, a communication interface, a digital-to-analog converter, a low-pass filter, a quadrature mixer, a power amplifier, an impedance matching circuit and an antenna; The above microcontroller module acquires data, and after the data is analyzed and processed, it is sent to the digital transmitter in the radio frequency module through the communication interface to generate a modulation signal, and then sent to the digital-to-analog converter to form an analog modulation signal, and the high-frequency signal is reduced by a low-pass filter. Interference, and then through the quadrature mixer, the analog modulation signal and the carrier signal are superimposed and modulated to the 510MHz radio frequency band. After the signal is passed to the power amplifier, it passes through the impedance matching circuit with a load impedance of 50Ω, and finally passes through the working frequency band of 510MHz, with a gain of 3.5dbi The omnidirectional antenna emits signals in the form of electromagnetic waves;
所述无线接收模块包括：微控制器模块、射频模块、电源模块、巴伦电路、低噪声放大器、混频器、数字-模拟转换器、数字基带接收器、基带处理器、通信接口和天线；天线接收到信号通过一个巴伦电路将单端射频信号转换为两个正交信号后传递给射频模块，然后信号通过低噪声放大器将信号功率放大，到了混频器后，高频信号的频谱会被搬移到合适调制的频段，再通过数字-模拟转换器对接收信号进行抽样并再生成数字信号，然后，由数字域的数字基带接收器对数字信号进行处理，基带处理器执行进一步的过滤和信号处理后，最后通过通信接口传递给微控制器模块对数据进行解析处理。The wireless receiving module includes: a microcontroller module, a radio frequency module, a power module, a balun circuit, a low noise amplifier, a mixer, a digital-to-analog converter, a digital baseband receiver, a baseband processor, a communication interface and an antenna; The antenna receives the signal through a balun circuit to convert the single-ended RF signal into two orthogonal signals and then transmits it to the RF module. Then the signal is amplified by the low-noise amplifier. After reaching the mixer, the frequency spectrum of the high-frequency signal will be It is moved to a suitable modulated frequency band, and then the received signal is sampled by a digital-to-analog converter to generate a digital signal, and then the digital signal is processed by the digital baseband receiver in the digital domain, and the baseband processor performs further filtering and After the signal is processed, it is finally transmitted to the microcontroller module through the communication interface to analyze and process the data.
进一步，所述无线发射模块中的射频模块和无线接收模块中的射频模块都采用CC1200射频芯片。Further, the radio frequency module in the wireless transmitting module and the radio frequency module in the wireless receiving module both adopt CC1200 radio frequency chip.
进一步，定义寄存器RFCTRL0为配置芯片信道的寄存器，微控制器模块的主控芯片通过串行通信接口向射频芯片内部的RFCTRL0寄存器写值来配置射频芯片的信道。Further, the register RFCTRL0 is defined as a register for configuring the chip channel, and the main control chip of the microcontroller module writes a value to the RFCTRL0 register inside the radio frequency chip through the serial communication interface to configure the channel of the radio frequency chip.
进一步，无线发送模块和无线接收模块的信道设置为同一参数，两者进行通信的媒介采用频段为510MHz的电磁波；所述发送模块和接收模块首先配置同一个空闲的通信信道并清空缓存。Further, the channels of the wireless sending module and the wireless receiving module are set to the same parameter, and the medium for communication between the two uses electromagnetic waves with a frequency band of 510MHz; the sending module and the receiving module first configure the same idle communication channel and clear the cache.
进一步，该模块还包括电源管理模块，电源管理模块采用普通锂电池或5V直流电源供电；当电池供电不足时，通过外部的充电接口对电池进行充电，并且有指示灯来指示电池的充电情况。Further, the module also includes a power management module, which is powered by an ordinary lithium battery or a 5V DC power supply; when the battery power supply is insufficient, the battery is charged through an external charging interface, and there is an indicator light to indicate the charging status of the battery.
本发明的有益效果在于：在本发明中，MSP430F5529微处理器和CC1200射频芯片一起工作，可以制作超低功耗通信模块，最低功耗能达到0.18uA；同时，优化了阻抗匹配电路，使发射功率达到+16dBm，有效通信距离达到了1.4公里，射频芯片的接收灵敏度可达到-105dBm，并且通过电磁兼容测试保证了无线通信模块的抗干扰性。The beneficial effect of the present invention is that: in the present invention, the MSP430F5529 microprocessor and the CC1200 radio frequency chip work together to make an ultra-low power consumption communication module, and the minimum power consumption can reach 0.18uA; at the same time, the impedance matching circuit is optimized so that the transmission The power reaches +16dBm, the effective communication distance reaches 1.4 kilometers, the receiving sensitivity of the radio frequency chip can reach -105dBm, and the anti-interference performance of the wireless communication module is guaranteed through the electromagnetic compatibility test.
附图说明Description of drawings
为了使本发明的目的、技术方案和有益效果更加清楚，本发明提供如下附图进行说明：In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:
图1为本发明所述模块的结构示意图；Fig. 1 is the structural representation of module described in the present invention;
图2软件系统示意图。Figure 2 Schematic diagram of the software system.
具体实施方式detailed description
下面将结合附图，对本发明的优选实施例进行详细的描述。The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
图1为本发明的模块的结构示意图，本发明是一种支持IEEE802.15.4g标准的510MHz无线低功耗通信模块，包括：微控制器模块、射频通信模块、电源模块、巴伦电路、低噪声放大器、混频器、数字基带接收器、基带处理器、串行通信接口、数模转换器、低通滤波器、正交混合器、功率放大器、阻抗匹配电路和天线。Fig. 1 is a schematic structural diagram of the module of the present invention, the present invention is a 510MHz wireless low-power communication module supporting the IEEE802.15.4g standard, including: a microcontroller module, a radio frequency communication module, a power module, a balun circuit, a low Noise amplifiers, mixers, digital baseband receivers, baseband processors, serial communication interfaces, digital-to-analog converters, low-pass filters, quadrature mixers, power amplifiers, impedance matching circuits, and antennas.
无线低功耗发送模块的微控制器模块获取数据，数据经解析处理后通过串行通信接口发送给射频模块中的数字发送器，生成调制信号，然后送入数模转换器(DAC)形成模拟调制信号，通过低通滤波器减少高频干扰，再通过正交混合器将模拟调制信号与载波信号叠加调制到510MHz射频频段，信号传递给功率放大器(PA)后，通过负载阻抗为50Ω的阻抗匹配电路，最后经过工作频段为510MHz，增益为3.5dbi的全向天线以电磁波的形式发射信号。The microcontroller module of the wireless low-power transmission module acquires data, and after the data is analyzed and processed, it is sent to the digital transmitter in the radio frequency module through the serial communication interface to generate a modulated signal, and then sent to the digital-to-analog converter (DAC) to form an analog The modulated signal reduces high-frequency interference through a low-pass filter, and then superimposes the analog modulated signal and carrier signal through a quadrature mixer to modulate to a 510MHz radio frequency band. After the signal is transmitted to the power amplifier (PA), it passes through a load impedance of 50Ω The matching circuit finally transmits signals in the form of electromagnetic waves through an omnidirectional antenna with a working frequency of 510MHz and a gain of 3.5dbi.
无线低功耗接收模块的510MHz天线接收到信号通过一个巴伦电路将单端射频信号转换为两个正交信号后传递给CC1200射频芯片，然后信号通过低噪声放大器(LNA)将信号功率放大，到了混频器后，高频信号的频谱会被搬移到合适调制的频段，再通过数字-模拟转换器(ADC)对接收信号进行抽样并再生成数字信号，然后，由数字域的数字基带接收器对数字信号进行处理，基带处理器执行进一步的过滤和信号处理后，最后通过串行通信接口传递给微控制器模块对数据进行解析处理。通过上位机接收的数据可以观察到此无线低功耗通信模块的通信的质量。The 510MHz antenna of the wireless low-power receiving module receives the signal through a balun circuit to convert the single-ended RF signal into two orthogonal signals and then transmits it to the CC1200 RF chip, and then the signal passes through a low-noise amplifier (LNA) to amplify the signal power, After arriving at the mixer, the frequency spectrum of the high-frequency signal will be moved to a frequency band suitable for modulation, and then the received signal will be sampled by a digital-to-analog converter (ADC) to generate a digital signal, and then received by the digital baseband in the digital domain After processing the digital signal, the baseband processor performs further filtering and signal processing, and finally transmits it to the microcontroller module through the serial communication interface to analyze and process the data. The communication quality of this wireless low-power communication module can be observed through the data received by the host computer.
当测试当前信道无线收发系统性能时，通过配置CC1200射频芯片的寄存器，将发送模块和接收模块设置为同样的中心频点，同样的波特率，同样的信道才能进行通信。发送模块和接收模块建立起无线通信连接，进行数据的发送与接收。进行通信的媒介是510MHz频段的电磁波。When testing the performance of the current channel wireless transceiver system, by configuring the registers of the CC1200 RF chip, the sending module and the receiving module are set to the same center frequency point, the same baud rate, and the same channel for communication. The sending module and the receiving module establish a wireless communication connection to send and receive data. The medium for communication is electromagnetic waves in the 510MHz frequency band.
发送模块和接收模块首先配置同一个空闲的通信信道并清空缓存。发送模块首先经过串口初始化，串行接口通信初始化及射频芯片初始化后将数据帧发送给接收模块，接收模块首先清空中断，然后等待FIFO(先入先出)存储器为空闲状态，再对数据进行CRC循环冗余校验码校验，若校验未通过，则丢弃数据帧，若校验通过，则对该数据帧进行解析接收，再通过串口方式传递给上位机直观的打印出数据。The sending module and the receiving module first configure the same idle communication channel and clear the cache. The sending module first initializes the serial port, serial interface communication initialization and RF chip initialization, and then sends the data frame to the receiving module. The receiving module first clears the interrupt, and then waits for the FIFO (first-in-first-out) memory to be idle, and then performs a CRC cycle on the data Redundancy check code verification, if the verification fails, the data frame will be discarded, if the verification is passed, the data frame will be parsed and received, and then passed to the host computer through the serial port to print out the data intuitively.
下面将以一具体实例对本发明的实施作进一步描述。The implementation of the present invention will be further described below with a specific example.
本实施例中所述微控制器采用TI公司的MSP430F55529芯片，它主要用来接收、存储和转发510MHz频段的数据，并将其中需要的数据信息转发到上位机；The microcontroller described in this embodiment adopts the MSP430F55529 chip of TI Company, which is mainly used to receive, store and forward data in the 510MHz frequency band, and forward the required data information to the host computer;
本实施例中所述微控制器选用了TI公司生产的MSP430F5529芯片，它主要用来接收、存储和转发510MHz频段的数据，并将其中需要的数据信息转发到上位机。该芯片是16位超低功耗微处理器，最高工作频率为25MHz，内置128K字节的闪存，具有关断、关闭和待机模式三种低功耗模式。同时，还具有丰富的外设接口，如USB、模拟比较器、DMA、硬件乘法器、RTC、USCI、12位DAC。提供JTAG/SWD下载调试接口，可通过四线方便地对芯片进行代码调试。该芯片的功耗最低可达到0.18uAThe MSP430F5529 chip produced by TI Company is selected as the microcontroller in this embodiment, which is mainly used to receive, store and forward data in the 510MHz frequency band, and forward the required data information to the host computer. The chip is a 16-bit ultra-low power consumption microprocessor with a maximum operating frequency of 25MHz, built-in 128K bytes of flash memory, and has three low power consumption modes: shutdown, shutdown and standby mode. At the same time, it also has rich peripheral interfaces, such as USB, analog comparator, DMA, hardware multiplier, RTC, USCI, 12-bit DAC. Provide JTAG/SWD download and debug interface, which can conveniently debug the code of the chip through four lines. The power consumption of the chip can reach as low as 0.18uA
本实施例中所述的射频模块采用TI公司的CC1200无线射频收发芯片，CC1200器件是一款全集成单芯片射频收发器，此器件设计用于在成本有效无线系统中实现极低功耗和低压运行的高性能。该器件主要用于工业、科学和医疗以及处于164-190MHz，410-475MHz和820-950MHz的短程设备频带。CC1200器件提供广泛硬件支持，以实现数据包处理、数据缓冲、突发传输、空闲信道评估、链路质量指示和无线电唤醒。CC1200器件的主要运行参数可由SPI接口进行配置，需要配置的寄存器参数包括中心频率、发射功率、频率偏移、工作模式、调制/编码、波特率、数据包格式等。支持的调制格式有2-频移键控(FSK)，2-高斯频移监控(GFSK)，4-FSK，4-GFSK，最小频移键控(MSK)和开关键控(OOK)，接收灵敏度可达-105dBm，低电流消耗断电电流低至0.3μA。The radio frequency module described in this embodiment adopts TI's CC1200 wireless radio frequency transceiver chip. The CC1200 device is a fully integrated single-chip radio frequency transceiver. This device is designed to achieve extremely low power consumption and low voltage in cost-effective wireless systems. high performance operation. The device is mainly used in industrial, scientific and medical and short range equipment frequency bands in 164-190MHz, 410-475MHz and 820-950MHz. The CC1200 devices provide extensive hardware support for packet processing, data buffering, burst transfers, clear channel assessment, link quality indication, and radio wake-up. The main operating parameters of the CC1200 device can be configured through the SPI interface. The register parameters that need to be configured include center frequency, transmit power, frequency offset, working mode, modulation/coding, baud rate, and data packet format. Supported modulation formats are 2-frequency shift keying (FSK), 2-Gaussian frequency shift monitoring (GFSK), 4-FSK, 4-GFSK, minimum frequency shift keying (MSK) and on-off keying (OOK), receiving Sensitivity can reach -105dBm, low current consumption power down current as low as 0.3μA.
本实施例中所述的电源模块采用普通的可充电的锂电池，或者也可使用标准电压为5V，电流为100mA的直流电源供电。输入电压通过AMS1117稳压芯片将电压转换成3.3V电压，为整个电路提供稳定的3.3V电源；当电池电量达不到最低电量要求时，可以通过5V电源接口对电池充电，充电芯片采用的是MCP738332，MCP738332是高级线性充电管理控制器，它的优点在于占用空间小，成本低，采用恒流/恒压充电算法，可选的预处理和充电终止。MCP73832可使用的环境温度范围为-40℃至+85℃。电源模块上的LED灯是用来指示电池充放电的情况，当电池充电时LED灯LED7会亮，当充电完毕时LED灯LED7将会熄灭。The power module described in this embodiment is powered by a common rechargeable lithium battery, or a DC power supply with a standard voltage of 5V and a current of 100mA. The input voltage is converted to 3.3V voltage by the AMS1117 voltage regulator chip, which provides a stable 3.3V power supply for the entire circuit; when the battery power does not meet the minimum power requirement, the battery can be charged through the 5V power interface, and the charging chip uses MCP738332, MCP738332 is an advanced linear charge management controller, which has the advantages of small footprint, low cost, constant current/constant voltage charging algorithm, optional pre-processing and charge termination. The ambient temperature range for the MCP73832 is -40°C to +85°C. The LED light on the power module is used to indicate the charging and discharging of the battery. When the battery is charging, the LED light LED7 will be on, and when the charging is completed, the LED light LED7 will be off.
参照图2，发送模块的主控部分首先进行串口初始化和SPI初始化，然后通过SPI控制CC1200射频模块，对其进行初始化。初始化包括设置其中心频率为510MHz、发射功率为+16dBm、滤波器带宽为25kHz、2-FSK调制、编码速率为1.2kbps等，初始化完成以后，主控模块将数据通过SPI传输给射频模块，射频模块把数据处理后，将数据从天线发射出来，载波为510MHz的电磁波，发送成功后LED会有提示。接收模块也会经过串口,SPI,射频初始化，然后接收模块会清除中断后检验是否空闲，接收模块接收到相同信道发送模块发送的数据后对数据进行字节数检验和CRC校验，若校验未通过，则丢弃数据帧，若校验通过，则对该数据帧进行解析。最后把数据打印到上位机。最后我们从上位机可以读出510MHz频段的信号强度RSSI，丢包率等数据以了解当前信道的通信质量。Referring to Figure 2, the main control part of the sending module first performs serial port initialization and SPI initialization, and then controls the CC1200 radio frequency module through SPI to initialize it. Initialization includes setting its center frequency to 510MHz, transmit power to +16dBm, filter bandwidth to 25kHz, 2-FSK modulation, encoding rate to 1.2kbps, etc. After initialization, the main control module transmits data to the RF module through SPI, and the RF After the module processes the data, it transmits the data from the antenna. The carrier wave is 510MHz electromagnetic wave. After the transmission is successful, the LED will prompt. The receiving module will also be initialized through the serial port, SPI, and radio frequency, and then the receiving module will clear the interrupt and check whether it is idle. If it fails, the data frame is discarded, and if the verification is passed, the data frame is parsed. Finally, print the data to the host computer. Finally, we can read the signal strength RSSI, packet loss rate and other data in the 510MHz frequency band from the host computer to understand the communication quality of the current channel.
按照上述结构，本发明可以配置相关参数，包括选择TX或RX模式。接收和发送模块通信时，如果模块的在相同的信道上就能接收到数据并把相应的信息通过上位机显示。比如，通过接收模块在上位机显示的实时收包个数、接收信号强度RSSI和测试发送和接收模块的通信质量，以便选择最合适的地点安装通信节点。According to the above structure, the present invention can configure related parameters, including selecting TX or RX mode. When the receiving and sending modules communicate, if the modules are on the same channel, they can receive data and display the corresponding information through the host computer. For example, the number of real-time received packets displayed on the host computer by the receiving module, the received signal strength RSSI and the communication quality of the test sending and receiving modules, so as to select the most suitable place to install the communication node.
最后说明的是，以上优选实施例仅用以说明本发明的技术方案而非限制，尽管通过上述优选实施例已经对本发明进行了详细的描述，但本领域技术人员应当理解，可以在形式上和细节上对其作出各种各样的改变，而不偏离本发明权利要求书所限定的范围。Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in terms of form and Various changes may be made in the details without departing from the scope of the invention defined by the claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044234.5ACN105704799A (en) | 2016-01-22 | 2016-01-22 | 510MHz wireless low-power-consumption communication module supporting IEEE802.15.4g standard |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044234.5ACN105704799A (en) | 2016-01-22 | 2016-01-22 | 510MHz wireless low-power-consumption communication module supporting IEEE802.15.4g standard |
| Publication Number | Publication Date |
|---|---|
| CN105704799Atrue CN105704799A (en) | 2016-06-22 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610044234.5APendingCN105704799A (en) | 2016-01-22 | 2016-01-22 | 510MHz wireless low-power-consumption communication module supporting IEEE802.15.4g standard |
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| CN (1) | CN105704799A (en) |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20160622 | |
| RJ01 | Rejection of invention patent application after publication |