lock n. 1.鎖,閂,栓。 2.(運(yùn)河等的)船閘。 3.制輪楔。 4.【機(jī)械工程】氣閘,氣塞,鎖氣室。 5.【軍事】槍機(jī)。 6.鎖住,固定。 7.〔俚語(yǔ)〕拘留所。 8.〔英國(guó)〕性病醫(yī)院 (=lock hospital). 9.【自動(dòng)化】同步。 10.結(jié)合,固著。 11.(摔跤的)揪扭。 12.煞車。 off the lock未鎖。 on the lock鎖著。 trick lock(對(duì)字的)密碼鎖。 lock the stable door after the horse has been stolen 賊走關(guān)門。 be at [on, upon] the lock 〔方言〕在窘困中。 lock, stock and barrel 全部;完全。 under lock and key 鎖著,妥為保藏。 vt. 1. 鎖,鎖上。 2.收藏起來(lái),秘藏。 3.抱緊,挽?。痪九?。 4.(使資本等)固定。 5.使固定。 6.用水閘止?。皇雇ㄟ^(guò)水閘 (up down). 7.卡住,塞住。 8.將曲面印版裝在輪轉(zhuǎn)印刷機(jī)滾筒上。 lock a secret in one's heart 嚴(yán)守秘密。 be locked in a fight 打得難分難解。 be locked in contemplation 陷入沉思。 The ship was locked fast in ice. 這條船被冰封住。 The gears are locked. 齒輪卡住了。 vi. 1.鎖住。 2.緊閉,不動(dòng)。 3.抱住,揪扭,嵌進(jìn)。 4.(船)通過(guò)水閘;造水閘。 lock away 鎖起來(lái)。 lock down 讓船開出水閘。 lock horns 爭(zhēng)論 (over)。 lock in 關(guān)起來(lái);鎖在里面。 lock in synchronism 進(jìn)入同步。 lock on 用雷達(dá)波束自動(dòng)跟蹤(目標(biāo))。 lock oneself in 把自己關(guān)在里面,閉門謝客。 lock out 1. 關(guān)在外面。 2. (資本家)封閉工廠。 lock up 1. 上鎖,鎖住。 2. 監(jiān)禁。 3. 收藏(文件等)。 4. 固定(資本)。 adj. -less 無(wú)鎖的;無(wú)船閘的。 lock2 n. 1.一綹卷發(fā)。 〔pl.〕頭發(fā)。 2.(干草、羊毛等的)小量,一把,一撮。
Digital lock - in amplifier based on dsp and sampling adc 的數(shù)字鎖定放大器
Lock - in amplifiers 鎖定放大器
A computer controls the whole process of measurements by communicating with the lock - in amplifier via rs232 interface 計(jì)算機(jī)通過(guò)rs232接口與鎖相放大器通信,控制測(cè)量的全過(guò)程。
A lock - in amplifier is used to supply the driving signal and to detect the output signal corresponding to the sample ' s strain 使用鎖相放大器提供驅(qū)動(dòng)信號(hào),并同時(shí)檢測(cè)對(duì)應(yīng)于樣品形變的輸出信號(hào)。
Photoelectric detecting circuit is constituted of four parts , i / v conversion , lock - in amplifier , low - pass filter and operation 光電檢測(cè)電路由四部分組成,分別是i / v轉(zhuǎn)換環(huán)節(jié)、鎖相放大環(huán)節(jié)、低通濾波環(huán)節(jié)、運(yùn)算環(huán)節(jié)。
The core of the lock - in amplifier used to measure response of laps consists of a high precision modulator / demodulator and dds as signal generator 對(duì)于光尋址電位傳感器,我們?cè)O(shè)計(jì)了以高精度調(diào)制解調(diào)器件和數(shù)字頻率合成器件為核心的模擬鎖相放大器。
For the signals are very weak , the lock - in amplifier is employed to extract the signals in the circuit design . it can inhabit the noise in the most and maximize the signal - to - noise 因?yàn)樾盘?hào)十分微弱,所以在電路設(shè)計(jì)上采用鎖相放大器來(lái)提取信號(hào),最大限度的抑制噪聲,提高系統(tǒng)的信噪比。
Using the home made device , the relationship between the 3 voltage and the heating frequency is obtained by lock - in amplifier , thus the thermal conductivity of the fluid is calculated with the least square fit method 自行研制了流體導(dǎo)熱系數(shù)的測(cè)量裝置,采用鎖相放大器獲取3電壓與頻率的關(guān)系,并借助最小二乘法,算出待測(cè)試樣的導(dǎo)熱系數(shù)。
The experiment results show that : the frequency stabilization of the optimized doppler modulator has already reached rms error about 1 % , which could meet the need of reference signal of the lock - in amplifier 實(shí)驗(yàn)結(jié)果表明,經(jīng)過(guò)優(yōu)化后的多普勒調(diào)制器的輸出調(diào)制信號(hào)頻率的相對(duì)標(biāo)準(zhǔn)誤差達(dá)到了1 %左右,能夠滿足鎖相放大器對(duì)輸入?yún)⒖夹盘?hào)頻率穩(wěn)定度的要求。
Choosing y type reflection fiber optic detector , this thesis create a tiny displacement - detecting sensor that is made up of led ( light emitting diode ) , fiber optic detector , electric eye , lock - in amplifier , display and other electro circuits 本論文采用y型反射式光纖探頭設(shè)計(jì)制作了一種微位移測(cè)量裝置,它主要由發(fā)光二極管、光纖探頭、 、鎖相放大器、顯示器及相關(guān)電路組成。