【正文】 但其對壓電振子的發(fā)電量有較大的要求，適合于振源充分，振動量大的場合，如作為汽車輪胎報警器的電源等。同時，雖然鎳氫電池充電時只需限制電流，而對鋰離子電池則需同時限制電壓和電流。雖然可充電電池可以作為壓電發(fā)電能的存儲元件，但還不能廣泛應(yīng)用于現(xiàn)行的電器元件中。其放電終止電壓為1V左右。通過對電解電容的充電和放電試驗，可以看出，普通的電解電容也可以作為儲能元件為電器設(shè)備供電。調(diào)節(jié)功率放大器，改變激振器的振幅，、電容選擇50V470微法的鋁電解電容。當(dāng)初始電壓相同時，不同容量的鋁電解電容其放電時間不同，其放電時間隨著電解電容的容量的增大而增大。鉭電解電容不像普通電解電容那樣使用鍍了鋁膜的電容紙燒制，所以本身幾乎沒有電感，但同時也限制了它的容量，目前，市場上所能買到的鉭電解電容，最大容量也只是100微法，其價格也比普通的鋁電解電容貴很多，而且鉭電解電容的耐電壓及電流能力相對較弱，并不是壓電發(fā)電能量存儲的最理想元件。為了比較兩種電解電容的充電特性，現(xiàn)取相同容量（100微法）的兩種電解電容進(jìn)行充電試驗。調(diào)節(jié)功率放大器，（以下試驗若無特別說明，均以此為標(biāo)準(zhǔn)），對電解電容、超級電容和可充電電池三種存儲介質(zhì)進(jìn)行存儲試驗比較。壓電振子固定在激振器上，構(gòu)成懸臂梁壓電發(fā)電裝置。同時，在某些場第三章壓電發(fā)電裝置的輸出功率與存儲特性分析，要保證在壓電發(fā)電裝置不工作的情況下，電器設(shè)備仍能正常工作，這就需要對壓電振子每次的發(fā)電量進(jìn)行存儲。電振子所輸出的有效電壓和有效功率與負(fù)載電阻之間的理論關(guān)系曲線；同時，利用試驗測試系統(tǒng)，選取不同阻值的電阻進(jìn)行試驗，可繪制出它們之間的試驗關(guān)系曲線，；，此時。金屬基板的材料為鈹青銅，尺寸參數(shù)為：LWh=80mm30mm。試驗過程中通過調(diào)節(jié)功率放大器的頻率及電壓，產(chǎn)生一個給定振幅和頻率的正弦激勵信號，使激振器按此正弦激勵振動。其中，壓電陶瓷的絕緣電阻相對于外部負(fù)載來說，阻值較大，可以忽略。因此，本章則對壓電發(fā)電裝置外接負(fù)載后的輸出功率進(jìn)行了系統(tǒng)的研究，并采用不同阻值的負(fù)載電阻進(jìn)行試驗驗證。 ⑤ high reliability. In order to pare the two types of charging characteristics of electrolytic capacitors, are taking the same capacity (100 micromethod) two electrolytic capacitor charging experiment. When external conditions are the same, the same capacity of electrolytic capacitors and tantalum electrolytic capacitors, which charge and discharge characteristics was nearly identical and no significant difference. Although pared to tantalum electrolytic capacitor aluminum electrolytic capacitors, there are many advantages, but it also has its own shortings. There is no electrolyte tantalum capacitor, it is suitable for high temperature work, so the use of metal tantalum medium for voltage, current limited occasions. Tantalum Electrolytic Capacitors Electrolytic Capacitors, as, unlike the ordinary use of the aluminumplated paper firing capacitor, so almost no inductance itself, but it also limited its capacity, at present, the market can buy tantalum electrolytic capacitors, the maximum capacity of only 100 micromethod, the price of aluminum electrolytic capacitors than ordinary expensive, and tantalum electrolytic capacitor voltage and current capacity is relatively weak, piezoelectric power generation is not the best energy storage ponents. In parison, aluminum electrolytic capacitors are cheap, and its larger capacity. In order to better understanding of the storage ，characteristics of electrolytic capacitors, with different capacity aluminum electrolytic capacitors, the chargedischarge test.When the piezoelectric vibrator when a certain output voltage, the electrolytic capacitor charge voltage eventually bee a stable value, that is reaching saturation voltage。 oscilloscope to measure the Parts of generating capacity. Since the piezoelectric vibrator support the use of cantilever, the natural frequency of a higher natural frequency for firstorder , and environment of the local oscillator frequency is well below this value, in order to make the frequency of piezoelectric vibrator and the environment of the natural frequency similarity may be in the piezoelectric vibrator additional focus on the quality of the free end of the block adjustment method. Trials, the increase in mass of the weight of grams, that it reduced the firstorder natural frequency . Regulation of power amplifiers, so that the output of a piezoelectric vibrator frequency of , the peak of the sinusoidal voltage of AC (in particular the absence of the following tests are used as criteria), on the electrolytic capacitors, super capacitors and rechargeable batteries in three storage medium for storage parison test. Containing polar electrolytic capacitors, the use of attention should be paid when the connection is negative, the electrolysis electric capacityCapacity can be used as a power supply. At present, the monly used electrolytic capacitors are tantalum electrolytic capacitors and aluminum electrolytic capacitors. Tantalum electrolytic capacitors and aluminum electrolytic capacitors pared to the benefits include: ① small。s normal work power, piezoelectric ceramics’ power capacity is extremely limited. At the same time, in certain third chapter of piezoelectricity electric power facility39。s resistance carries on the experiment, may draw up between them the experimental relations curve, its correspondence39。s size and the material performance parameter are as fol