压力传感器温度补偿技术分析

压力传感器是一种较为常用的传感器件,由于自身的非线性特点以及外界因素的影响,传感器的输出结果容易产生误差,其中温度的影响最大,因此,对传感器的温度补偿就显得尤为重要。文章对目前常用的温度补偿方法进行了分析,在此基础上,提出了一种新的温度补偿方法 ,并对BP神经网络进行了改进,从研究结果来看,该方法有效提高了传感器的稳定性及精度。     

压阻式压力传感器的温度特性研究

本文针对压阻式压力传感器的温度特性,提出了对其零位温度漂移和灵敏度温度漂移的补偿方法在传感器芯片上加做温敏电阻和加热电阻对其零位温度漂移和灵敏度温度漂移进行补偿,并通过试验证明这种方法是非常有效的.     

DS18B20在解决应变测量中的应用

工业现场的温度变化范围大而剧烈，工作在工业现场的传感器大多数都对温度有一定的敏感度，这样就会使传感器的零点发生漂移，导致测量出现附加误差，因此温度补偿问题一直是传感器技术中的关键环节。根据单总线数字式温度传感器DS18820的工作原理、结构，并以电阻应变式传感器为例，提出了具体的补偿方案。     

压阻式压力传感器的温度特性研究

本文针对压阻式压力传感器的温度特性,提出了对其零位温度漂移和灵敏度温度漂移的补偿方法:在传感器芯片上加做温敏电阻和加热电阻对其零位温度漂移和灵敏度温度漂移进行补偿,并通过试验证明这种方法是非常有效的.     

霍尔式位移传感器的温度特性

本文研究了霍尔式位移传感器的温度特性，在理论分析的基础上设计了温度补偿电路和相应的软件补偿程序，使温度误差小于０．１％Ｃ＾－１。误差分析的结果与温度实验相吻合，证明了方法的可行性。     

基于钹式换能器的振动加速度传感器温度特性研究

使用2-（0）-2连通型的金属．陶瓷压电复合材料作为敏感元件构成压电振动加速度传感器。研究了这种新型压电振动加速度传感器的输出电压的温度特性．将DS18820集成到传感器内部用于内部环境温度的测量。利用单片机对传感器零位输出电压进行记录，得到传感器零位电压温度特性曲线。采用了基于最小二乘原理的分段线性插值法，对其温度特性的非线性进行了有效地补偿。试验结果表明，经过温度补偿后，在20～80℃范围内，零点输出电压温度误差由原来的9．8％降到了0．8％。     

基于MAX1457的加速度硅微传感器的信号处理

测高g值的加速度硅微传感器采用单晶硅材料制成，直接输出信号小，存在严重的温度误差。采用MAX1457专用传感器信息处理器，它可以补偿传感器的温度误差和非线性误差。本文分析了MAX1457的工作原理，设计了获得补偿参数的系统，最后采用高速的CMOS逻辑或门对8个阵列传感器信号进行选择。     

高精度扩散硅压力传感器的温度补偿

本文分析了扩散硅压力传感器的零点、零位温度系数及灵敏度温度系数三个基本参数并给出了温度补偿的计算公式。理论及实践均表明：采用此种方法补偿扩散硅压力传感器能满足高精度压力测量的要求。     

带温度补偿基于薄壁圆筒结构的光纤光栅压力传感器

阐述了一种带温度补偿、基于薄壁圆筒结构的高量程光纤光栅（FBG）压力传感器.薄壁圆筒直接作为弹性体,在压力作用下产生轴向位移来拉动压力敏感光纤以实现压力传感;通过被动温度补偿和残留温度效应主动实时修正来共同消除薄壁圆筒和压力敏感FBG的温度漂移;同时,对带温度补偿的FBG压力传感器的温度稳定性进行了讨论,给出了理想情况下该系统可达到的最优温度稳定性及决定因素.研究结果表明：基于30CrMiSiA材料管道结构的FBG压力传感器可以进行压力传感,其重复性为0.505 2%;回程误差为4.006%;线性度为0.285 5%;传感器精度为±2.639 8%;基于温度补偿进行温度去敏也有很好的效果,在-30～100℃范围内,该系统的温度稳定性因子为9.079 6%;随着实验温度范围减小至0～60℃,系统温度稳定性因子也减小至4.0%.     

扩散硅绝对压力传感器的补偿方法研究

本文简要介绍了扩散硅绝对压力传感器的工作原理与结构,重点分析了传感器的零位温度系数与灵敏度温度系数及其温度补偿的方法,解决了此类传感器的稳定性问题。     

Application of induction transducers for measuring displacements at high temperatures

Conclusions The above transducer can be used as a basis for designing an instrument for automatic checking and control of the starting and operating of powerful steam turbines. The temperature-compensated transducer can also be used for remote contactless measurements of clearances in other machines which operate at high temperatures. The above method of temperature compensation can be used for induction transducer measurements of other quantities. There exists the possibility of increasing the temperature operating range of the transducer. However, for this purpose it may be necessary to use magnetic materials with higher Curie points, for instance, cobalt.     

燃油流量高精度计量的研究

分析了涡轮流量传感器的工作原理。研究了由于燃油的温度变化引起的传感器本身尺寸变化、燃油密度变化给计量精度带来的影响。在温度、压力可调整的燃油实验装置上对传感器进行了实验研究。发现可以用线性公式来描述质量仪表系数随温度变化的规律；质量仪表系数的绝对变化量、相对变化量可近似为恒定值。提出了两种温度补偿方法，可分别得到优于0．2％和优于0．25％的质量流量计量精度。     

Verification of thermally induced nanometer actuation of magnetic recording transducer to overcome mechanical and magnetic spacing challenges

Protrusion of the recording element during the write process due to Joule heating and eddy-current losses adds a significant constraint in reducing the flying height of sliders found in magnetic recording devices. Variation of the drive temperature also adds similar constraint to the system. One method of overcoming these challenges is to control the relative position of the magnetic recording transducer with respect to the disk surface by thermally heating the transducer region, a concept outlined in a U.S. patent. In this paper, we experimentally show that the thermal actuation concept outlined in the patent can indeed be employed to control the magnetic spacing.     

变容量中央空调系统调节技术的比较分析

对变频控制技术、多级控制技术和数码涡旋技术的工作原理、容量输出与温度控制、能效比、除湿性能、可靠性等进行了分析，指出了各种调节控制技术的优缺点。通过比较发现，使用数码涡旋压缩机的系统运行性能稳定，容量控制灵活，系统能效比和可靠性高。在变容量系统中数码涡旋压缩机的使用具有良好的市场适应力和广阔的发展潜力。     

基于拓扑优化的压电分流阻尼抑振实验研究

将结构拓扑优化引入压电分流振动抑制中,以压电元件的分布面积为设计变量,压电元件产生的电荷最大化为优化目标,对压电元件的拓扑进行了优化以获得最佳抑振效果。针对悬臂梁结构,得到了对不同的结构模态进行抑制时的压电元件最优拓扑构型。建立了带有压电分流阻尼系统的悬臂梁振动控制实验模型,将压电元件拓扑优化后的压电分流阻尼系统应用于悬臂梁多阶弯曲模态的振动响应抑制实验,并对比分析了带最优拓扑和非优拓扑压电元件的悬臂梁压电分流阻尼抑振效果。结果表明,对压电元件进行拓扑优化可以明显提高压电分流阻尼系统的抑振效果。     

Design of a platinum resistance thermometer temperature measuring transducer and improved accuracy of linearizing the output voltage

An improved method is presented for designing a temperature measuring transducer, the electrical circuit of which comprises an unbalanced bridge, in one arm of which is a platinum resistance thermometer, and containing a differential amplifier with feedback. Values are given for the coefficients, the minimum linearization error is determined, and an example is also given of the practical design of the transducer, using the given coefficients. A determination is made of the limiting achievable accuracy in linearizing the output voltage of the measuring transducer, as a function of the range of measured temperature.Translated from Izmeritel'naya Tekhnika, No. 1, pp. 48–50, January, 1995.     

圆环换能器故障成因评判的实验设计

在实际工程中，批量的圆环换能器在工作一段时间后出现侧边打火、绝缘下降的故障现象，为摸清故障出现的原因，设计了评判故障成因的实验。实验环境模拟换能器的实际工作条件，实验过程中检测圆环换能器的阻抗、静态电容、绝缘电阻、外观及手感温度等变化情况，然后测试换能器的电声性能，并与正常性能的换能器进行对比。实验数据和结果表明：圆环换能器出现故障的原因为其在空气中进行大功率发射。     

Performance analysis of ultrasono-therapy transducer with contact detection

The performance of ultrasono-therapy transducer with contact detection by using the impedance phase change is described. Usually a therapy transducer is designed with a /spl lambda//2 frontal plate glued to a PZT-4 piezoceramic. This plate ensures a good mechanical protection of the piezoceramic with a corresponding high-transmission energy. Normally this transducer is operated at the minimum at the frequency of the impedance module of its input electric impedance, but this operation point is affected by the shift caused by the expected temperature increase. This shift could be higher than the narrow bandwidth presented. As a result we obtain a decrease in the power level for medical treatment. Usually electronic drivers with automatic control that follow the frequency change are designed, however, the relatively narrow bandwidth introduces difficulty in the design. Another frequency operation point is presented here and analyzed using the criteria of the maximum of the impedance phase with a wider bandwidth than in the previous case. Simulation with mechanical losses are presented with experimental results that show the convenience of this criteria for practical application.     

Impact of Electromagnetic Field upon Temperature Measurement of Induction Heated Charges

The use of thermoelements is a commonly applied method in industry and engineering. It provides a wide measurement range of temperature, a direct voltage signal from the transducer, low cost of the thermoelement, and its resistance to many unfavorable factors which occur in an industrial environment. Unfortunately, thermoelements may not be resistant to interferences of a strong electromagnetic field because of the nature and design of a transducer. Induction heating is the most commonly used type of heating, at present, for metals. In order to guarantee the correctness of the carried out heating process, it is essential to control the temperature of the heated element. The impact of a strong electromagnetic field upon the thermocouple temperature measurement of the inductively heated elements has been analyzed in this paper. The experiment includes dozens of measurements where the following parameters have been varied: frequency of the current which feeds the heating inductor, power supplied to the heating system, geometry of heat inductor, and the charge material and its geometrical dimensions. Interferences of the power-line frequency have been eliminated in part of the carried out measurements.     

Solid/Liquid State Sensor

A common problem in industrial processes, particularly those involving electroheat, is the holding of metallic charges at their solid/liquid state interface temperature. A transducer has been developed that achieves this by plunging and widthrawing a probe in an induction-heated metallic charge. The probe is driven by a servomotor whose armature current senses the state of the charge. Successful results have been obtained with induction-heated metals and alloys. In many cases the degree of control is so precise that the limit cycle amplitude is undetectable. Preliminary investigations into nonmetallic charges have also been conducted. These can be successful provided the induction heater output is low. The new transducer is simple, rugged, inexpensive, and constructed from items readily available in industrial instrumentation laboratories. The presentation is intended for the professional engineer concerned with the control of industrial processes.