近年来,随着养殖场信息化建设的推进,奶牛行为监控设备逐步得以应用,并显现出功能的重要性.本文主要介绍了奶牛行为监控设备的推广应用对养殖场改进管理和提升效益的重要意义,重点分析了目前的推广应用情况和存在的主要问题,并提出了对策.最后,对奶牛行为监控设备的未来发展趋势进行了展望.

本文从畜禽养殖机械化消杀防疫设备发展的现实需求出发,分析了近年有关政策支持的情况,介绍了相关推广技术依据的完善情况及有关工作进展,详细介绍了主要设备有关参数的统计结果,分析了存在的主要问题,提出了有关对策建议,以期促进畜禽养殖机械化消杀防疫相关技术研究深入,增强产品适用性,充分发挥机械化设备在加强畜禽养殖安全方面的重要作用.

随着智能手机用户不断增加和网络平台的快速发展,通过视频学习解决农机使用维修中遇到的实际问题已成为重要渠道.利用教学视频开展培训,越来越受到各级农机化主管部门的重视,既丰富了培训形式,也提升了培训效果.本文旨在总结农机使用维修教学视频课件项目实施过程中的常见问题,并提出相关解决建议,为项目组织者提供有意义的参考.

通过开发在线学习平台,有助于满足农机驾驶操作与维修人员、教学培训人员学习需求,帮助解决常见问题和提升技能水平,同时有利于吸引优质课件等学习资源,并且进一步聚集和扩散.笔者参与组织了“农机使用维修技能学习平台”的开发,自2017年初上线以来,参加学习人数不断增加,平台精品课件平均单个阅读超20万次,达到了设计的培训效果.

It is known that the resonant operation of the coupled coils has important influences to reduce the reactive power and improve the transmission efficiency from the features of the resonant coupling circuit in the contractless power transmission(CPT) system.Based on above theory,a resonant frequency tracking method was presented in the CPT system by a DSP TMS320F2812 based software phase locked loop,and then the specific designing ideas and software flowcharts were introduced.Finally,the experimental results demonstrate the feasibility and effectiveness of this method.

The invention discloses a CPT resonance frequency device based on a DSP phase lock technique. The CPT resonance frequency device based on the DSP phase lock technique mainly comprises a power supply unit, an LC resonance coupler and a frequency tracking unit, wherein the frequency tracking unit comprises a digital signal processor (DSP), the pulse width modulation (PWM) input end of the DSP is connected with a power amplifier connected with the LC resonance coupler, inductors and capacitors of a primary coil and a secondary coil of the LC resonance coupler are arranged symmetrically, PWM waves produced by the DSP are converted to sinusoidal waves through second order filtering, input into the power amplifier, and outputs sinusoidal signals with certain power to the LC resonance coupler. According to the CPT resonance frequency device based on the DSP phase lock technique, signal output power of the power amplifier is controlled by PWM waves produced by the DSP, phase lock is achieved by utilizing the DSP, not only hardware circuits are simplified and cost is reduced, but also problems of burn-in, temperature drift and the like of devices in analog circuits are solved, and accuracy and speed of the phase lock are improved.