CN201247325Y - Wireless sensor network device for detecting mobile object based on microwave radar technology - Google Patents
Wireless sensor network device for detecting mobile object based on microwave radar technology Download PDFInfo
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Abstract
本实用新型属于无线传感器网络领域，具体是一种利用微波雷达传感器模块探测移动物体的无线传感器网络装置，它包括微波雷达传感模块、滤波降噪单元、差分放大单元、电平转换单元、控制单元和射频单元。本实用新型通过雷达传感模块探测移动物体频谱信号，实时探测并计算出移动物体的速度，并通过无线传输的通信方式把数据发送至基站以进行应用处理。本实用新型具有不受环境状况和天气情况影响、无需经常维护、探测灵敏度高、探测角宽、探测距离远和安装便捷等特点，适用于室内或户外多种场合，在监控或安防领域具有广阔的应用前景。
The utility model belongs to the field of wireless sensor networks, in particular to a wireless sensor network device using a microwave radar sensor module to detect moving objects, which includes a microwave radar sensor module, a filtering noise reduction unit, a differential amplification unit, a level conversion unit, a control unit and RF unit. The utility model detects the spectrum signal of the moving object through the radar sensing module, detects and calculates the speed of the moving object in real time, and sends the data to the base station through the communication mode of wireless transmission for application processing. The utility model has the characteristics of not being affected by environmental conditions and weather conditions, no need for frequent maintenance, high detection sensitivity, wide detection angle, long detection distance and convenient installation. application prospects.
Description
技术领域 technical field
本实用新型属于无线传感器网络领域，具体是一种基于微波雷达技术探测移动物体的无线传感器网络装置。The utility model belongs to the field of wireless sensor networks, in particular to a wireless sensor network device for detecting moving objects based on microwave radar technology.
背景技术 Background technique
移动物体检测技术主要应用与监控和防盗领域，目前移动物体检测主要通过红外手段实现，但是这种方法容易受到天气环境的影响和遮挡物的干扰，外界的热源也会干扰到正常的探测，并且外场安装的设备日积月累下来由于尘埃的作用需要人工清洗维护，红外技术探测移动物体的固有缺陷给这项技术的应用带来了诸多不便。Mobile object detection technology is mainly used in monitoring and anti-theft fields. At present, mobile object detection is mainly realized by infrared means, but this method is easily affected by the weather environment and interference from obstructions, and external heat sources will also interfere with normal detection, and The equipment installed in the field has accumulated over time due to the effect of dust and needs to be cleaned and maintained manually. The inherent defects of infrared technology to detect moving objects have brought a lot of inconvenience to the application of this technology.
本实用新型是基于微波雷达技术探测移动物体的无线传感器网络装置，它具有不受环境状况和天气情况影响、无需经常维护、探测灵敏度高、探测角宽、探测距离远和安装便捷的优点。The utility model is a wireless sensor network device for detecting moving objects based on microwave radar technology, which has the advantages of not being affected by environmental conditions and weather conditions, no need for frequent maintenance, high detection sensitivity, wide detection angle, long detection distance and convenient installation.
发明内容 Contents of the invention
本实用新型的目的是提供一种基于微波雷达技术探测移动物体的无线传感器网络装置和实现方法。The purpose of this utility model is to provide a wireless sensor network device and implementation method for detecting moving objects based on microwave radar technology.
本实用新型要解决的是现有移动物体探测方法受环境干扰和天气情况影响大、需要经常维护、探测角窄、探测距离近和安装繁琐等问题。The utility model aims to solve the problems that the existing mobile object detection method is greatly affected by environmental interference and weather conditions, requires frequent maintenance, narrow detection angle, short detection distance and cumbersome installation.
为实现以上目的，本实用新型由微波雷达传感模块、滤波降噪单元、差分放大单元、电平转换单元、控制单元和射频单元组成。微波雷达传感器模块连接与滤波降噪单元，滤波降噪单元和差分放大单元连接，差分放大单元连接和电平转换单元连接，电平转换单元和控制单元连接，控制单元连接于射频单元。In order to achieve the above objectives, the utility model is composed of a microwave radar sensing module, a filter noise reduction unit, a differential amplification unit, a level conversion unit, a control unit and a radio frequency unit. The microwave radar sensor module is connected with the filter noise reduction unit, the filter noise reduction unit is connected with the differential amplifier unit, the differential amplifier unit is connected with the level conversion unit, the level conversion unit is connected with the control unit, and the control unit is connected with the radio frequency unit.
微波雷达传感器模块用来实时采集移动物体的频率变化，并输出相应的电压信号；The microwave radar sensor module is used to collect the frequency changes of moving objects in real time and output corresponding voltage signals;
滤波降噪单元用来滤去微波雷达传感器模块输出信号的噪声，提高信噪比；The filter noise reduction unit is used to filter out the noise of the output signal of the microwave radar sensor module and improve the signal-to-noise ratio;
差分放大单元用来对微波雷达模块的输出进行充分放大，并把放大后的信号送入电平转换单元；The differential amplification unit is used to fully amplify the output of the microwave radar module, and send the amplified signal to the level conversion unit;
电平转换单元将来自于差分放大单元的信号转换成控制单元可以接受的数字信号；The level conversion unit converts the signal from the differential amplifier unit into a digital signal acceptable to the control unit;
控制单元经过一定的算法处理得出是否存在移动物体及移动速度；The control unit obtains whether there is a moving object and the moving speed through certain algorithm processing;
控制单元控制射频单元的初始化，向射频单元传送数据，接收来自射频单元的数据；The control unit controls the initialization of the radio frequency unit, transmits data to the radio frequency unit, and receives data from the radio frequency unit;
控制单元还协调整个系统的有效运行，控制系统功耗，延长装置工作时间；The control unit also coordinates the effective operation of the entire system, controls the power consumption of the system, and prolongs the working time of the device;
射频单元与基站建立无线通信联系，进行数据交换。The radio frequency unit establishes a wireless communication link with the base station for data exchange.
本实用新型的装置通过对微波雷达传感器模块输出信号的预处理，采用相应的计算方法，实时探测出是否存在移动物体及其速度，并通过无线传输的通信方式把数据发送至基站以进行应用分析。The device of the utility model preprocesses the output signal of the microwave radar sensor module, adopts the corresponding calculation method, detects whether there is a moving object and its speed in real time, and sends the data to the base station for application analysis through the communication mode of wireless transmission .
本实用新型具有不受环境状况和天气情况影响、无需经常维护、探测灵敏度高、探测角宽、探测距离远和安装便捷等优点，适用于室内或户外多种场合，在监控或安防领域具有广阔的应用前景。The utility model has the advantages of not being affected by environmental conditions and weather conditions, no need for frequent maintenance, high detection sensitivity, wide detection angle, long detection distance and convenient installation. application prospects.
附图说明 Description of drawings
图1为本实用新型框图。Fig. 1 is a block diagram of the utility model.
具体实施方式 Detailed ways
下面结合附图及实施例对本实用新型作进一步说明。Below in conjunction with accompanying drawing and embodiment the utility model is further described.
如图所示，本实用新型由微波雷达传感模块、滤波降噪单元、差分放大单元、电平转换单元、控制单元和射频单元组成。As shown in the figure, the utility model is composed of a microwave radar sensing module, a filter noise reduction unit, a differential amplification unit, a level conversion unit, a control unit and a radio frequency unit.
微波雷达传感器模块连接与滤波降噪单元，滤波降噪单元和差分放大单元连接，差分放大单元连接和电平转换单元连接，电平转换单元和控制单元连接，控制单元连接于射频单元。The microwave radar sensor module is connected with the filter noise reduction unit, the filter noise reduction unit is connected with the differential amplifier unit, the differential amplifier unit is connected with the level conversion unit, the level conversion unit is connected with the control unit, and the control unit is connected with the radio frequency unit.
微波雷达传感器模块用来实时采集移动物体的频率变化，并输出相应的电压信号；滤波降噪单元用来滤去微波雷达传感器模块输出信号的噪声，提高信噪比；差分放大单元用来对微波雷达模块的输出进行充分放大，并把放大后的信号送入电平转换单元；电平转换单元将来自于差分放大单元的信号转换成控制单元可以接受的数字信号；控制单元经过一定的算法处理得出是否存在移动物体及移动速度；控制单元控制射频单元的初始化，向射频单元传送数据，接收来自射频单元的数据；控制单元还协调整个系统的有效运行，控制系统功耗，延长装置工作时间；射频单元与基站建立无线通信联系，进行数据交换。The microwave radar sensor module is used to collect the frequency changes of moving objects in real time and output corresponding voltage signals; the filter noise reduction unit is used to filter out the noise of the output signal of the microwave radar sensor module and improve the signal-to-noise ratio; the differential amplifier unit is used to detect microwave The output of the radar module is fully amplified, and the amplified signal is sent to the level conversion unit; the level conversion unit converts the signal from the differential amplification unit into a digital signal acceptable to the control unit; the control unit undergoes certain algorithm processing Find out whether there is a moving object and the moving speed; the control unit controls the initialization of the radio frequency unit, transmits data to the radio frequency unit, and receives data from the radio frequency unit; the control unit also coordinates the effective operation of the entire system, controls the power consumption of the system, and prolongs the working time of the device ; The radio frequency unit establishes a wireless communication link with the base station for data exchange.
本实用新型的装置通过对微波雷达传感器模块输出信号的预处理，采用相应的计算方法，实时探测出是否存在移动物体及其速度，并通过无线传输的通信方式把数据发送至基站以进行应用分析。The device of the utility model preprocesses the output signal of the microwave radar sensor module, adopts the corresponding calculation method, detects whether there is a moving object and its speed in real time, and sends the data to the base station for application analysis through the communication mode of wireless transmission .
本实用新型对移动物体探测的原理是：把本装置安装于需要探测的区域附近，微波雷达传感器模块持续向外辐射频率高频电磁波，同时接收外界反射回来的电磁波，当有移动物体从探测区域经过时，由于移动物体存在一定的移动速度，根据多普勒效应，被移动物体反射并且被微波雷达传感器模块接收到的电磁波频率会发生改变，微波雷达传感器将这种频率变化转化为模拟信号输出，经过滤波降噪单元之后，通过差分放大单元进行放大，并由电平转换单元转化成数字信号输入控制单元，控制单元通过相应的计算方法，计算出物体是否移动及移动速度，然后将结果经由射频单元通过无线方式传输至基站。The principle of the utility model for detecting moving objects is: the device is installed near the area to be detected, the microwave radar sensor module continues to radiate frequency and high-frequency electromagnetic waves outward, and at the same time receives electromagnetic waves reflected from the outside, when there is a moving object from the detection area When passing by, because the moving object has a certain moving speed, according to the Doppler effect, the frequency of the electromagnetic wave reflected by the moving object and received by the microwave radar sensor module will change, and the microwave radar sensor will convert this frequency change into an analog signal output , after passing through the filtering and noise reduction unit, it is amplified by the differential amplifier unit, and converted into a digital signal input control unit by the level conversion unit. The control unit calculates whether the object moves and the moving speed through the corresponding calculation method, and then passes the result through The radio frequency unit transmits to the base station wirelessly.
为了使整个装置在一套完善的低功耗模式下工作，控制单元和射频单元只有在短暂的检测时间内处于正常工作模式，其余时间处于超低功耗模式，保证系统以最低的平均功耗进行工作。正常工作模式和超低功耗模式之间的切换靠控制单元协调实现。In order to make the whole device work in a complete set of low power consumption modes, the control unit and radio frequency unit are only in the normal working mode for a short detection time, and the rest of the time are in the ultra-low power consumption mode to ensure the system with the lowest average power consumption working. Switching between normal operating mode and ultra-low power mode is coordinated by the control unit.
本实用新型中的射频单元工作频率为433MHz，信道数目255个，射频单元的数据传输速率及功率可调，最大传输速率500kbps，最大传输功率10dBm，射频单元最大传输功率10dBm，射频单元室内布设最大无线传输距离为100米。The working frequency of the radio frequency unit in the utility model is 433MHz, the number of channels is 255, the data transmission rate and power of the radio frequency unit are adjustable, the maximum transmission rate is 500kbps, the maximum transmission power is 10dBm, the maximum transmission power of the radio frequency unit is 10dBm, and the indoor layout of the radio frequency unit is the largest The wireless transmission distance is 100 meters.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8830116B2 (en) | 2011-12-07 | 2014-09-09 | Industrial Technology Research Institute | Radar wave sensing apparatus and method |
| CN104202080A (en) * | 2014-09-09 | 2014-12-10 | 安徽四创电子股份有限公司 | 60M radar data transmission device |
| CN107219503A (en) * | 2017-06-21 | 2017-09-29 | 西南大学 | Radar signal frequency estimating methods based on sensor network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8830116B2 (en) | 2011-12-07 | 2014-09-09 | Industrial Technology Research Institute | Radar wave sensing apparatus and method |
| CN104202080A (en) * | 2014-09-09 | 2014-12-10 | 安徽四创电子股份有限公司 | 60M radar data transmission device |
| CN107219503A (en) * | 2017-06-21 | 2017-09-29 | 西南大学 | Radar signal frequency estimating methods based on sensor network |
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