本文選題：多閾值　切入點(diǎn)：碰撞傳感器　出處：《大連理工大學(xué)》2016年碩士論文

【摘要】：與加速度計(jì)不同,多閾值碰撞傳感器無(wú)需復(fù)雜的輔助電路和控制單元即可根據(jù)外界加速度的變化來(lái)快速切換不同工作狀態(tài),具有集慣性傳感與執(zhí)行于一體、無(wú)功耗和可靠性高的優(yōu)點(diǎn),在車輛安全系統(tǒng)、武器引信系統(tǒng)和防跌落保護(hù)系統(tǒng)具有廣泛的應(yīng)用需求�，F(xiàn)有碰撞傳感器存在的感應(yīng)閾值單一、接觸不穩(wěn)定和抗過載能力弱等不足,已難以滿足多級(jí)車輛安全保護(hù)系統(tǒng)的應(yīng)用需求。綜合分析影響碰撞傳感器感應(yīng)精度和接觸可靠性的關(guān)鍵因素,本文以新型多閾值碰撞傳感器設(shè)計(jì)為目標(biāo),具體展開以下工作：1)考慮車輛安全氣囊的引爆條件和要求,提出了基于非線性多穩(wěn)態(tài)機(jī)構(gòu)的多閾值碰撞傳感器設(shè)計(jì)方法,引入磁性觸點(diǎn)梁結(jié)構(gòu),利用磁吸合特性有效解決了過載回彈造成的接觸不穩(wěn)定問題；2)考慮氣膜阻尼的影響,建立了多閾值碰撞傳感器的靜力學(xué)和動(dòng)力學(xué)模型,分析了加速度閾值和脈寬對(duì)開關(guān)動(dòng)作的影響。數(shù)值仿真與實(shí)驗(yàn)結(jié)果表明,在10.0ms矩形脈沖加速度載荷激勵(lì)下,具有雙向6閾值加速度感應(yīng)功能,且最大抗過載能力可達(dá)到第一閾值加速度的15.3倍,第二閾值加速度的4.5倍和第三閾值加速度的2.9倍；3)通過分析碰撞過程中駕乘人員頭部運(yùn)動(dòng)特征,得到了基于加速度峰值法的碰撞傳感器引爆條件。研究了側(cè)向加速度干擾、振動(dòng)干擾環(huán)境下多閾值碰撞傳感器的敏感性能,仿真結(jié)果表明多閾值碰撞傳感器在1.0g的側(cè)向加速度下滿足設(shè)計(jì)要求,并且能夠在幅值為10.0m/s2的共振環(huán)境中正常工作。研制了多閾值碰撞傳感器試驗(yàn)樣件,理論仿真與實(shí)驗(yàn)結(jié)果基本一致,從而驗(yàn)證了多閾值碰撞傳感器設(shè)計(jì)方法的有效性和可行性。
[Abstract]:Unlike the accelerometer, multi threshold collision sensor without auxiliary circuit and control unit can be complicated to quickly switch between different working state according to the change of external acceleration, inertial sensing and actuating is set in one, no power consumption and high reliability, the vehicle safety system, fuze system and fall protection system with application requirements widely. The existing collision induced threshold single sensor, unstable contact and anti overload ability is poor, has been difficult to meet the application requirements of vehicle safety multistage protection system. The key factors affecting comprehensive analysis of collision sensor accuracy and reliability of the contact, using a new type of multi threshold collision sensor design, the following work: 1) consider tipping conditions and requirements of vehicle airbags, proposes a multi threshold mechanism based on nonlinear steady-state value collision The design method of the sensor, the introduction of magnetic contact beam structure, the use of magnetic pull in characteristics can effectively solve the overload caused by springback unstable contact problems; 2) taking into account the influence of the gas film damping, a static and dynamic model of multi threshold collision sensor, analyzes the influence of acceleration threshold and pulse width of the switching action. The results of numerical simulation and experiment show that in the acceleration excitation 10.0ms rectangular pulse, with two-way 6 threshold acceleration sensing function, 15.3 times and the maximum anti overload capacity can reach the first threshold acceleration of 2.9 times, second times and third of the 4.5 threshold acceleration threshold acceleration; 3) through the analysis of head movement characteristics of occupants in the collision process, the collision sensor the peak acceleration method based on the condition of lateral acceleration detonated. The sensitivity of interference, multi threshold collision sensor vibration interference environment Can, the simulation results show that the multi threshold collision sensors meet in the lateral acceleration 1.0g under the design requirements, and be able to work normally in the 10.0m/s2 resonance amplitude is developed. The multi threshold collision sensor test, theoretical simulation and experimental results are basically consistent, which verifies the validity of the design method of multi threshold collision sensor and feasibility.

【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U463.6

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本文編號(hào)：1716484