【摘要】：沖擊波是武器彈藥威力研究的重要參數(shù),可以為武器彈藥的毀傷效能評(píng)估及地面防護(hù)提供有力依據(jù)。隨著分布式測(cè)試技術(shù)和無線通信技術(shù)的飛速發(fā)展,出現(xiàn)了基于ZigBee和藍(lán)牙等無線通信的分布式壓力測(cè)試系統(tǒng)。當(dāng)爆炸場(chǎng)測(cè)試節(jié)點(diǎn)數(shù)量增多、數(shù)據(jù)容量增大以及測(cè)試要求提高時(shí),對(duì)爆炸后無線數(shù)據(jù)回收速率提出了更高的要求。針對(duì)以上問題,本文具體研究?jī)?nèi)容如下:一、結(jié)合以太網(wǎng)通信技術(shù),將以太網(wǎng)接口的無線通信模塊應(yīng)用到分布式壓力測(cè)試系統(tǒng)中,設(shè)計(jì)了具有無線通信功能的沖擊波壓力測(cè)試節(jié)點(diǎn)。該節(jié)點(diǎn)主要由以太網(wǎng)接口式無線通信電路、ICP傳感器、信號(hào)調(diào)理電路、信號(hào)采集存儲(chǔ)電路和電源電路等幾部分組成,可以對(duì)沖擊波信號(hào)進(jìn)行采集、存儲(chǔ),并將采集到的信號(hào)通過無線通信模塊發(fā)送至無線控制終端,以便后續(xù)數(shù)據(jù)處理。二、本文構(gòu)建了分布式壓力測(cè)試系統(tǒng)的專屬無線局域網(wǎng)絡(luò)。該網(wǎng)絡(luò)主要由測(cè)試節(jié)點(diǎn)、覆蓋AP、中繼AP、接入點(diǎn)AP和控制終端組成。在該網(wǎng)絡(luò)中,一方面根據(jù)鏈路預(yù)算法對(duì)前端覆蓋范圍進(jìn)行了預(yù)測(cè),覆蓋半徑可達(dá)216米,且能在測(cè)試現(xiàn)場(chǎng)迅速組建;另一方面,通過增加無線中繼來加大無線通信的距離,實(shí)現(xiàn)了控制中心對(duì)遠(yuǎn)距離處測(cè)試場(chǎng)中測(cè)試節(jié)點(diǎn)的集中管理。實(shí)驗(yàn)中,不僅對(duì)無線測(cè)試節(jié)點(diǎn)的電路功能及無線局域網(wǎng)的通信功能進(jìn)行了驗(yàn)證,且無線覆蓋距離達(dá)到了200米,無線數(shù)據(jù)傳輸速率最低也可達(dá)1200kbps。在此基礎(chǔ)上,針對(duì)2.4GHz無線信號(hào)的傳播特性進(jìn)行了信道建模,用實(shí)測(cè)信號(hào)建立了近地電磁波信號(hào)的對(duì)數(shù)衰減模型,該模型表明無線信號(hào)會(huì)隨覆蓋距離的增加而呈對(duì)數(shù)衰減的趨勢(shì),并用相同環(huán)境下的測(cè)試數(shù)據(jù)驗(yàn)證了模型的合理性,即模型所得205米的覆蓋距離與實(shí)驗(yàn)環(huán)境下所得有效覆蓋距離200米十分接近。最后,對(duì)中繼的遠(yuǎn)距離傳輸進(jìn)行了實(shí)驗(yàn),實(shí)驗(yàn)中無線傳輸距離達(dá)到了2公里。在實(shí)際彈藥爆炸試驗(yàn)中,本文所研究的以太網(wǎng)接口無線通信系統(tǒng)具有良好的穩(wěn)定性和可靠性,且具有一定的實(shí)用價(jià)值。
[Abstract]:Shock wave is an important parameter in the study of weapon and ammunition power, which can provide a powerful basis for the evaluation of damage effectiveness of weapon and ammunition and ground protection. With the rapid development of distributed testing technology and wireless communication technology, distributed stress testing systems based on wireless communication such as ZigBee and Bluetooth have emerged. When the number of test nodes in the explosion field increases, the data capacity increases and the test requirements increase, the wireless data recovery rate after explosion is required to be higher. In view of the above problems, the specific contents of this paper are as follows: first, combining Ethernet communication technology, the wireless communication module of Ethernet interface is applied to the distributed pressure test system. A shock wave pressure test node with wireless communication function is designed. The node is mainly composed of an ICP sensor, a signal conditioning circuit, a signal acquisition and storage circuit, a power supply circuit and so on, which can collect and store the shock wave signals. The collected signal is transmitted to the wireless control terminal through the wireless communication module for subsequent data processing. Secondly, this paper constructs the wireless local area network of distributed stress testing system. The network consists of test nodes, overlay AP, relay AP, access point AP and control terminal. In this network, on the one hand, according to the link budget law, the front end coverage range is predicted, the coverage radius can reach 216 meters, and can be set up quickly in the test site; on the other hand, the distance of wireless communication is increased by increasing wireless relay. The centralized management of the test nodes in the remote test field is realized by the control center. In the experiment, not only the circuit function of the wireless test node and the communication function of the wireless local area network are verified, but also the wireless coverage distance is up to 200 meters, and the lowest wireless data transmission rate can be up to 1200 kbps. On this basis, the channel model of the propagation characteristics of 2.4GHz wireless signal is established, and the logarithmic attenuation model of near-ground electromagnetic wave signal is established with the measured signal. The model shows that the wireless signal will show a logarithmic attenuation trend with the increase of coverage distance. The rationality of the model is verified by the test data in the same environment, that is, the coverage distance of 205 meters obtained by the model is very close to that of the effective coverage distance of 200 meters in the experimental environment. Finally, the remote transmission of the relay is experimented, and the wireless transmission distance reaches 2 km. The Ethernet interface wireless communication system studied in this paper has good stability and reliability, and has certain practical value.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TJ410.6;TP393.11;TN925.93

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本文編號(hào)：2219882