本文關(guān)鍵詞：基于STM32和Android的綜合聽力檢測系統(tǒng)的設(shè)計　出處：《南方醫(yī)科大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 耳聲發(fā)射 聽覺腦干反應(yīng) STM32單片機 安卓操作系統(tǒng)

【摘要】：耳聲發(fā)射(otoacoustic Emission,OAE)和聽覺腦干反應(yīng)(auditory brainstem response,ABR)是臨床常用的客觀聽力檢測方法。OAE是由耳蝸中產(chǎn)生,通過聽骨鏈和鼓膜傳導(dǎo)釋放在外耳道的音頻信號。OAE提供了一種客觀且無創(chuàng)的耳蝸檢查方法,因此OAE被廣泛應(yīng)用于臨床新生兒聽力篩查、耳蝸病變診斷等。ABR是人聽覺神經(jīng)受到聲刺激后,在額頭及乳突之間測量得到的生物腦電信號。ABR可以反映人體聽覺神經(jīng)通路的健康狀況,在臨床常用于新生兒聽力篩查、鑒別蝸后病變等。單一的OAE檢測或ABR檢測只能判斷人聽覺系統(tǒng)耳蝸或聽覺神經(jīng)功能,因此臨床上需要結(jié)合兩種方法做聽力檢測。OAE和ABR的檢測方法都是通過聲刺激人體聽覺系統(tǒng)后采集誘發(fā)信號,信號測量方法存在共性。然而目前臨床常用的OAE檢測系統(tǒng)和ABR檢測系統(tǒng)大部分由不同的儀器獨立完成,且該類設(shè)備為國外廠商壟斷,價格昂貴。另外傳統(tǒng)聽力檢測設(shè)備都以電腦作為數(shù)據(jù)處理、數(shù)據(jù)呈現(xiàn)和人機交互平臺,但電腦體積大不便攜帶,且功耗大、線纜多信號易受干擾。隨著移動互聯(lián)網(wǎng)發(fā)展和移動智能設(shè)備的出現(xiàn),將傳統(tǒng)醫(yī)療設(shè)備與之結(jié)合產(chǎn)生的移動醫(yī)療設(shè)備逐漸興起。但目前國內(nèi)市場尚無基于移動醫(yī)療設(shè)備設(shè)計原理的OAE和ABR綜合檢測儀器�；谝陨显虮疚脑O(shè)計了一款基于STM32單片機和安卓(Android)手機的、具備檢測OAE和ABR功能的便攜式聽力檢測系統(tǒng)。該系統(tǒng)主要包含一個以STM32單片機為核心的下位機,以及一臺安卓智能手機作為上位機。系統(tǒng)通過安卓智能手機控制下位機產(chǎn)生刺激聲,傳感器采集數(shù)據(jù)后在下位機分析處理,并將檢測結(jié)果通過無線藍牙傳輸?shù)绞謾C,手機進行檢測結(jié)果數(shù)據(jù)的呈現(xiàn)和存儲等。本文詳述聽力檢測系統(tǒng)的硬件設(shè)計、軟件設(shè)計等。聽力檢測系統(tǒng)硬件設(shè)計以高集成度和低噪聲為原則。系統(tǒng)硬件包括電源電路、STM32單片機電路、刺激聲產(chǎn)生電路、OAE預(yù)處理電路、ABR預(yù)處理和驅(qū)動電路、ADC和信號隔離電路、阻抗測量和信號隔離電路、藍牙模塊電路等。系統(tǒng)軟件包括STM32單片機固件程序和安卓應(yīng)用程序。固件程序包含控制部分和信號處理部分,其中控制部分用于控制刺激聲播放以及OAE和ABR信號采集、阻抗測量、信號傳輸?shù)?信號處理部分用于OAE和ABR信號處理。安卓應(yīng)用程序包含人機交互模塊、藍牙通信以及數(shù)據(jù)存儲模塊等。本文最后通過實驗驗證聽力檢測系統(tǒng)設(shè)計的可行性和有效性,分別進行了噪聲測試、刺激聲播放和阻抗測量測試、同步性測試、OAE測試以及ABR測試。通過實驗結(jié)果證明設(shè)計的聽力檢測系統(tǒng)可以進行OAE和ABR檢測。
[Abstract]:Otoacoustic emission (OAE) and auditory brainstem response (BAE) and auditory brainstem response (auditory brainstem response). ABR is a commonly used clinical objective audiometry. OAE is produced in cochlea. The auditory chain and tympanic membrane conduction release audio signal in the external auditory canal. OAE provides an objective and non-invasive method for cochlear examination, so OAE is widely used in clinical neonatal hearing screening. The diagnosis of cochlea lesion. ABR is a biological EEG signal measured between the forehead and mastoid process after the auditory nerve is stimulated by sound. ABR can reflect the health status of human auditory nerve pathway. Single OAE or ABR can only judge the cochlea or auditory nerve function of human auditory system. Therefore, it is necessary to combine the two methods to detect the hearing. OAE and ABR in clinic are to collect the evoked signals through the sound stimulation of human auditory system. However, most of the current clinical OAE detection systems and ABR detection systems are independently completed by different instruments, and this kind of equipment is monopolized by foreign manufacturers. In addition, the traditional hearing testing equipment takes the computer as the data processing, data presentation and human-computer interaction platform, but the large size of the computer is inconvenient to carry, and the power consumption is large. With the development of mobile Internet and the emergence of mobile intelligent devices, cable multi-signal is vulnerable to interference. The combination of traditional medical devices with mobile medical devices is emerging gradually. However, there are no OAE and ABR integrated testing instruments based on the design principle of mobile medical devices in the domestic market. A single chip based on STM32 and Android (. Android. A portable hearing testing system with the functions of OAE and ABR. The system mainly includes a lower computer with STM32 microcontroller as the core. As well as an Android smart phone as the host computer. The system controls the lower computer to produce stimulatory sound through the Android smart phone, the sensor collects the data and analyzes the data in the lower computer. And the detection results are transmitted to the mobile phone through wireless Bluetooth, the mobile phone to display and store the results of the data. This paper describes the hardware design of the hearing detection system. The hardware design of the hearing detection system is based on the principle of high integration and low noise. The hardware of the system includes the power supply circuit STM32 single chip microcomputer circuit and the stimulation sound generation circuit and the OAE preprocessing circuit. ABR preprocessing and driving circuits, ADCs and signal isolation circuits, impedance measurement and signal isolation circuits. Bluetooth module circuit and so on. System software includes STM32 MCU firmware program and Android application program. Firmware program includes control part and signal processing part. The control part is used to control the sound playing of stimuli, OAE and ABR signal acquisition, impedance measurement, signal transmission and so on. The signal processing part is used for OAE and ABR signal processing. Android applications contain human-computer interaction modules. Bluetooth communication and data storage module etc. Finally, the feasibility and effectiveness of the design of hearing test system are verified by experiments. Noise test, stimulus sound playing test and impedance measurement test, synchronization test are carried out respectively. OAE test and ABR test. The experimental results show that the designed hearing test system can be used for OAE and ABR testing.
【學(xué)位授予單位】：南方醫(yī)科大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP274;R318.6

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