The viscosity of paint dissolved liquid for enameled Wire is key that manufacture enameled wire, paint dissolved liquid is volatilization and change every moment, this paper presents a new method for real-time measurement of the viscosity of paint dissolved liquid for enameled wire, the new method is by piezoelectric effect and inverse piezoelectric effect, and supported by PIC16F877 single-chip microcomputer, the viscosity measurement and the real-time change of the viscosity of paint dissolved liquid, in order to produce the high quality of the enameled wire.

在电子元器件测量仪器行业中,正弦波的应用十分重要,可是设计的正弦波发生器总是不能达到理想的效果,存在高次谐波,产生叠加量,影响了测量的精度.因此本文叙述了基于PIC16F873单片机正弦波发生器的设计.

在电磁元器件行业中绕线机的应用十分广泛,绕线机是在同一个面板上由多头异步电机组成,并通过一个PIC16F873单片机芯片控制板来控制.由于绕线机适用于很多电磁元器件行业,因此需经常对绕线机进行参数的修改,提出使用PS/2接口的16位按键的小键盘作为修改工具,进行对参数的修改设定.

Based on the present situation of the domestic wire paint coating equipment and technology,the new method of tension control of superfine wire paint process is put forward,tension control of super fine wire paint process is realized by the control system,which is composed of the tension sensor,PIC16F873 single chip microcomputer control chip,torque motor 3 unit.The experiment and application results show that it has the meaning of reality of this control method to improve the superfine wire product quality.

In production of enameled wire,the concentration of the paint is usually measured.A 16-bit PS/2 interface small keyboard used as input tool and method of controlling MCU communication mode is proposed.

Mutant Klebsiella penumonia(Kp8) transform biodiesel waste glycerol to 3-HPA under free and immbolization condition.It showed that 3-HPA relative production rate of Kp8 conversion 30 g/L waste glycerol(condition I) was 13.75 % higher than originality Klebsiella penumonia(Kp0) conversion 30 g/L simple glycerol(condition II);Kp8 and Kp0 immobilized by sol-gel and ferment under condition I and condition II,3-HPA relative producing rate of former was 73.75 % of free Kp0's,the latter was 65.6 %;Immobilized cells fermented for 7 batchs,3-HPA producing rate of condition I fell from 80 % to 60 %,3-HPA overall yield fell from 0.321 g/g to 0.243 g/g,conversion rate was fall from 40.1 % to 30.4 %,3-HPA relativity produce rate of condition II remained between 70 %~80 %,3-HPA overall yield remained between 0.315 g/g~0.276 g/g,conversion rate remained between 39.4 %~34.5 %.

采用激光复合诱变方式筛选产中性植酸酶的大肠杆菌（Escherichia coli）、枯草杆菌（Bacillus subtilis）,混合波长λ=1.06+0.53μm,辐照时间1 m in,辐照功率15 W;酶的细胞定位实验表明,所产中性植酸酶是胞外酶;酶学特性测定表明,大肠杆菌所产植酸酶酶反应最适pH为7.4,最适温度为37℃,枯草杆菌所产植酸酶反应最适pH为7.4,最适温度为37℃;酶学性质分析表明,大肠杆菌所产植酸酶具有一定的pH适性和一定的温度耐受性。

Phytase producing Aspergillus niger was treated with 1.06 μm,0.53 μm and 1.06 μm+0.53 μm high repetition rate Nd:YAG laser by sequential and pulse radiate manner.From the results of mutagenesis and the comparison of the product of the forward mutate ratio and the forward mutate range,it showed that the mutate result of sequential better than that of the pulse;Among the sequential manner,the mutate effect of 1.06 μm laser radiation was prominence with 15 W power and 1 min radiate time,to 0.53 μm laser,radiation the radiation time should be protracted radiate time;Among the pulse radiation manner,mutate effect of 1.06 μm laser radiation was better and the suitable pulse number was 100~200.One mutate fungus that produced thermostability phytase was screened,the effect of high temperature was lower,its activity remained 44 % after being keept for 10 min at 80 ℃.

A long period fiber grating(LPG) biosensor for detecting bio-layer thickness is introduced in this paper.The principle of the biosensor is by coating a idiosyncratic bioactive layer(with refractive index n_3 ) on the fiber cladding(with refractive index n_2),and in the condition of n_3≥ n_2,the variety of bio-layer thickness brings about variety of resonant wavelengths of LPG.So the variety of bio-layer thickness can be detected by measuring resonant wavelengths of LPG.Main function of the biosensor is to detect antigen in blood while antibody as bioactive layer.Reaction between antigen and antibody occurs and it shows that there is antigen in blood when resonant wavelengths shift is detected.Silicify layer is used as fundus layer since its refractive index is much the same as that of antigen and antibody.The thickness of fundus layer is about 120 nm.Resonant wavelengths is demodulated by using a turnable F-P interferometer of simple and small frame and with practicability.

Phytase-producing fungus Aspergillus niger was mutated by laser radiation under different conditions.The appropriate conditions was determinated:1.06 μm Nd:YAG high repetition rate sound-optic Q-modulation laser,4 kHz,10 W power,and plane irradiation for 2~2.5 min.The mutant fungus gene bank was established.Through high flux sieving,one mutant fungus(phy226),its enzymatic properties more accordant with industrial requirement,was selected,because its second enzymatic activity apex between pH=2~3 was improved by 40% and stabilized at 30~60 ℃.The fermentation liquor was purified through salting out,dialysis,gel chromatography and ion-exchange chromatography,and 7.8-fold purification was attained with 25.2% recovery.

The surface hardness and microstructure distribution of three kinds of steel(3Cr2W8、Cr12、T8A),which are changed by single line heat treatment and folded line heat treatment,are studied in this article.It is indicated that the surface microstructure of the material by single line heat treatment,is comprised of interface zone and hardened zone,the hardness is also improved.The difference between the folded line treatment and the single line treatment are the surface hardness and microstructure of the tempering region,the hardness of this zone is decreased respectively by tempering process.The reasons of these phenomena have also been analyzed in this paper.These technologies have been proved conductive in practice.

KTP gray-tracking caused by the high power laser limits the further increase of the second harmonic conversion efficiency.Using a pico-second laser pulse generated by a convex-ARR unstable resonator Nd:YAG laser to study the SHG of the KTP and BBO crystals.The influence of KTP gray tracking on the SH conversion efficiencies is analyzed.In the experiment ,the conversion efficiencies 43.8% and 32% for extra-cavity frequency doubling,53.4% and 70% for intra-cavity frequency doubling are obtained,respectively.It shows that at lower power density (below the threshold of KTP gray-tracking),the SH efficiency in KTP is higher than that in BBO crystal;but for the high power density,the conversion efficiency in KTP becomes lower compared to BBO crystal since the KTP gray-tracking generated.

Second harmonic energy conversion efficiencies in KTP and BBO crystals have been investigated by using pico-second pulse. For extracavity-doubled, conversion efficiencies 43.8% and 32% were obtained, respectively. In intracavity-doubled, efficiencies 53.4% and 70% by using convex-ARR (Anti-resonant Ring) unstable resonator, 60.2% and 80.6% by using unstable confocal resonator were achieved, respectively. It shows that KTP crystal has higher conversion efficiency at lower intensity (under KTP gray-tracking threshold) and lower efficiency at high power laser compared to the BBO crystal. This result principally caused by the KTP gray-tracking phenomena.

研究3Cr2W8钢在激光热处理和交叠处理下材料表面显微组织的分布特征和表面硬度分布,并且确定了在一定条件下的最佳加工功率;激光表面热处理后硬化表面由过渡区和相变硬化区组成,加工后的硬度很高;激光交叠处理后的差异表现在回火软化区,硬度会相应有所下降,回火软化区是由于后道激光处理时的回火作用造成的.

An Anti-Resonant Ring (ARR) structure was introduced to a conventional passively solid-state Q-switched Nd:YAG laser for the first time. Using a plane-ARR critical resonator, and Cr4+:YAG crystal, BDN dye film and color centered LiF:F-2 crystal as saturable absorber. High energy and high stability single Q-switched pulse with the output energies range from 101.6 - 82.5 mJ and stabilities range from 99.2 - 98.6% were obtained respectively. The experimental results were analyzed well by using the mechanism of the transient grating effect generated by ARR structure.

A antiresonant ring(ARR) was introduced to a conventional passively Qswitched laser.Cr4+:YAG crystal,BDN dye film and LiF:F-2 color center crystal were selected as saturable absorbers.PlaneARR critical resonator and convexARR unstable resonator were adopted in our experiments.High stability and large energy single Qswitched pulses with energy greater than 80 mJ and fluctuation less than 1.5 % were obtained,respectively.The results were explained well by the grating effect of ARR and the excited state absorption of saturable absorber.

本文叙述了激光涂敷技术的优点及目前研究现状,采用HJ-4型2KW横流CO2激光器作为激光源,用A3纲及45#纲作涂敷材料的基体,以Ni基粉及掺有陶瓷粉末及稀土元素粉末的材料作为激光涂层材料,在实验中发现,该技术存在有一个最佳涂敷预涂层厚度,这种厚度与基体材料,涂层材料及有关的激光参数如激光功率,激光扫描速度,光斑尺寸等有关.在涂敷材料中加入了陶瓷材料如Al2O3可以提高熔敷层的硬度及强度,加入稀土元素如Y2O3粉末可以作为涂层的稳定剂,可以减少熔敷层的裂纹及增加强度.

在带抗共振环 (ARR) 的非稳腔Nd∶YAG激光器中, 将调Q材料 Cr4+∶YAG晶体和LiF∶F2色心晶体置于ARR中心,获得调Q单脉冲能量分别为86.1 mJ和85.3 mJ.这一输出能量远大于相同实验条件下传统的平-凸非稳腔激光器,理论分析很好地解释了实验结果.

分析Cr4+:YAG 被动锁模机理及KTP晶体的倍频效率,设计合适的谐振腔以保证Cr4+:YAG 处有足够大的激光功率密度和通过KTP的光束为平行光束.实现了Cr4+:YAG 作为可饱和吸收体的脉冲式Nd:YAG内腔倍频激光器的被动锁模运转,得到波长532nm、输出能量为13.5mJ的皮秒单脉冲序列.

本文采用简并四波混频技术在室温下研究晶化a-Si:H/a-SiNx:H多层纳米硅复合膜三阶非线性光学性质,首次观察到这种多层膜的相位共轭信号,在共振光波波长λ=589nm处实验所用样品的三阶非线性极化率为χ(3)=1.4×10-6esu,分析表明其非线性光学响应增强的原因是纳米硅的强量子限域作用.