随着光伏发电系统快速发展,以及电动汽车充电桩的普及,传统的剩余电流保护器无法满足实际需求。介绍了一款B型剩余电流保护器,采用磁调制剩余电流互感器和零序电流互感器采集剩余电流。根据GB/T 22794—2017标准要求,可识别1 kHz及以下的正弦交流、带和不带直流分量的脉动直流、平滑直流等剩余电流信号。经信号调理电路将电压信号送到单片机进行采集和判断。通过试验测试,该样机在测试精度和速度上均符合国家标准的相关要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
标签: 电流保护器
上传时间: 2022-03-27
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入室抢劫事件屡见不鲜,针对此现象进行分析不难发现,造成失窃事件的极大原因是人们慵懒和意识差等不良性格造成习惯性不锁门.本文以STC89C52单片机为基础,设计了一种基于人体红外传感器的自动关门锁门装置,来解决此类问题.The incidents of burglary are so common. It is not difficult to find that the main reason for the burglary is the habit of unlocking of doors caused by people's laziness and poor consciousness. Based on the single chip microcomputer of STC89C52, a device used with infrared sensor of human body is introduced in this paper, which can achieve the effect of automatic closing and locking doors.
上传时间: 2022-03-27
上传用户:canderile
文章提出了一种基于AT89S51单片机的智能家居系统的设计,该系统具有室内煤气以及烟雾的检测、家庭室内防盗等功能。文章详细分析了系统的总体设计,详尽分析并设计了煤气传感器模块、烟雾传感器模块、人体红外感应传感器模块、报警模块等各硬件部分,并利用PROTUES软件进行了系统仿真。仿真结果证明:系统具有成本低、效率高、操作方便等优点,达到了预期设计的效果。This paper presents the design of an intelligent home system based on AT89S51 microcontroller.The system has the functions of detecting indoor gas and smoke,guarding against theft in the home,and so on.The overall design of the system is analyzed in detail.The gas sensor module,smoke sensor module,human infrared sensor module,alarm module and other hardware parts are analyzed and designed in detail,and the system simulation is carried out using PROTUES software.The simulation results show that the system has the advantages of low cost,high efficiency,convenient operation and so on,and achieves the expected design effect.
上传时间: 2022-03-28
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因此,您想编写一个内核模块。您知道C,您已经编写了一些可以作为进程运行的常规程序,现在您想知道真正的动作在哪里,一个通配指针可以擦掉文件系统,核心转储意味着重新启动。内核模块到底是什么?模块是可以根据需要加载和卸载的代码段。它们扩展了内核的功能,而无需重新引导系统。例如。模块驱动程序的一种类型是设备驱动程序,它允许内核访问没有模块的系统硬件,我们将不得不构建单片内核并将新功能直接添加到内核映像中,除了具有更大的内核之外,这还具有缺点每次我们想要新功能时都要求我们重建并重新启动内核的过程So, you want to write a kernel module. You know C, you, ve written a few normal programs to run as processes, and now you want to get to where the real action is, to where a single wild pointer can wipe out your file system and a core dump means a reboot.What exactly is a kernel module? Modules are pieces of code that can be loaded and unloaded into th upon demand. They extend the functionality of the kernel without the need to reboot the system. For example.one type of module is the device driver, which allows the kernel to access hardware connected to the syste without modules, we would have to build monolithic kernels and add new functionality directly into the em ernel image, Besides having larger kernels
标签: linux
上传时间: 2022-03-30
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电学中的测量技术涉及范围非常广,电流测量在电学计量中占有非常重要的位置。如何精确地进行电流测量是精密测量的一大难题。传统的电流检测电路多采用运算放大芯片与片外电流检测电路相结合的方式,电路集成度很低,需要较多的接口和资源才能完成对电路的检测。本文把所有电路部分都集成在一块芯片上,包括检测电阻,运算放大器电路及模拟转数字转换电路,从而在电路内部可以进行电流检测,使电路更好的集成化。前置电路使用二级共源共栅结构的运算放大器,减小沟道长度调制效应造成的电流误差。10位SAR ADC中采用电容驱动能力强的传输门保证了模数转化器的有效精度。比较器模块采用再生锁存器与迟滞比较器作为基础单元组合解决精密测量的问题。本设计可以作为嵌入芯片内的一小部分而检测芯片中的微小电流1mA~100mA,工作电压在1.8v左右,电流检测精度预期达到10uA的需求。The measurement technology in electricity involves a wide range,and current measurement plays a very important position in electrical measurement.How to accurately measure current is a big problem in precision measurement. The traditional current detecting circuit adopts the combination of the operational amplifier chip and theoff-chip current detecting circuit, The circuit integration is very low, and more interfaces and resources are needed tocomplete the circuit detection.This topic integrates all the circuit parts into one chip, including detection resistance, operational amplifier circuit andanalog to digital conversion circuit. Highly integrated circuit makes the external resources on the chip more intensive,so that current detection can be carried out inside the circuit, so that the circuit can be better integrated. Thefront-end circuit of this project uses two-stage cascade operational amplifier and cascade tube to reduce the currenterror caused by channel length modulation effect. In 10-bit SAR ADC, the transmission gate with strong capacitivedriving ability ensures the effective accuracy of the analog-to-digital converter. Comparator module uses regenerativelatch and hysteresis comparator as basic unit to solve the difficult problem of precision measurement. This topic can beused as a small part of the embedded chip to detect the micro-current in the chip 1 mA~100 mA, the working voltageis about 1.8v, and the current detection accuracy is expected to reach the requirement of 10 uA.
上传时间: 2022-04-03
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为设计高效率、低损耗的PFC电路,本文基于UCC28019进行电路设计。以UCC28019输出的PWM波形来控制Boost升压斩波为核心电路,使电路中的电容交替地充放电、电感交替的储存和释放能量,最后实现在输入AC20V~24V电压情况下稳定输出DC38V。测试结果表明,系统实现效率为95%左右,电压调整率小于1%,电源功率因数0.99。交流输入电压为19.0-25.8 V时,输出直流电压稳定性较好,电感无明显啸叫且纹波小,具有一定的带负载能力和实用性。In order to design the PFC circuit with high efficiency and low loss,this paper designs the circuit based on UCC28019.The PWM waveform output by UCC28019 is used to control boost chopper as the core circuit,which alternately charges and discharges capacitors,stores and releases energy by inductors,and finally achieves stable output of DC38 V under the input voltage of AC20 V~24 V.The test results show that the system achieves about 95% efficiency,the voltage adjustment rate is less than 1%,the power factor is 0.99,and the AC input voltage is 19.0-25.8 V.The output DC voltage stability is good,the inductance has no obvious whistle and the ripple is small,so it has certain load capacity and practicability.
上传时间: 2022-04-03
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目的:自主研制一款超声手术刀电源控制系统,以减少能量的消耗,维持手术刀的正常温度。方法:对超声换能器在谐振附近的等效电路建立模型,并设计基于数字信号处理(DSP)的超声手术刀的硬件控制系统。结果:经对电源控制系统的电路和工作性能测试,生成的电流和电压的有效值等参数,能够及时调整电源的频率,并达到预期的功能指标,使超声手术刀工作在谐振状态。结论:以DSP为核心设计的超声手术刀电源控制系统,测试指标均能够达到预期的要求,能够使系统在谐振状态下工作。Objective: To independently develop a power control system of ultrasonic scalpel so as to reduce the energy consumption and maintain the normal temperature of ultrasonic scalpel. Methods: In this paper, the model of equivalent circuit of ultrasonic transducer nearby syntony was built up, and the hardware control system of ultrasonic scalpel based on digital signal processing(DSP) was designed. Results: Through testing the circuit and work performance of power control system, the series of parameters such as effective value and so on which were produced by this system could adjust frequency of power source in time and attain anticipative functional indicator, and it took the ultrasonic scalpel to work in syntonic situation. Conclusion: The tested indicators of power control system of ultrasonic scalpel based on the kernel design of DSP can attain anticipative requirement, and can take this system to work in syntonic situation.
上传时间: 2022-04-03
上传用户:bluedrops
本文设计了一种磁致伸缩位移传感器,介绍了该磁致伸缩位移传感器的测量原理,通过结构优化设计提高了仪器的性能,详述了硬件电路设计及实现方法,完成了软件设计,实现了高压充电、问询脉冲加载、时间测量及滤波等功能,并通过实验对其性能进行了验证。所研制的磁致伸缩位移传感器具有测量精度高、长期稳定性好等特点,满足了大量程、高精度、恶劣环境等测量的要求。A kind of sensor based on magnetostrictive principle is designed.The measuring principle of the magnetostrictive displacement sensor is introduced,the performance of the instrument is improved by the structural optimization design,and introduced the hardware circuit design and the realization method,completed the software design,realized the functions of the high voltage charging,inquiries pulse loading,time measurement and filtering,and its performance is verified through the experiment.The magnetostrictive displacement sensor has the characteristics of high measuring precision.The sensor meets the requirements of large range,high precision,poor environment and so on.
标签: 位移传感器
上传时间: 2022-04-06
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产品型号:VK3603 产品品牌:VINKA/永嘉微电 封装形式:ESOP8 产品年份:新年份 联 系 人:陈锐鸿 Q Q:361 888 5898 联系手机:188 2466 2436(信) 概述: VK3603具有3个触摸按键,可用来检测外部触摸按键上人手的触摸动作。该芯片具有较 高的集成度,仅需极少的外部组件便可实现触摸按键的检测。 提供了3路直接输出功能。芯片内部采用特殊的集成电路,具有高电源电压抑制比,可 减少按键检测错误的发生,此特性保证在不利环境条件的应用中芯片仍具有很高的可靠性。 此触摸芯片具有自动校准功能,低待机电流,抗电压波动等特性,为各种触摸按键+IO 输出的应用提供了一种简单而又有效的实现方法。 特点: • 工作电压 2.4-5.5V • 待机电流7uA/3.3V,14uA/5V • 上电复位功能(POR) • 低压复位功能(LVR) • 触摸输出响应时间: 工作模式 48mS 待机模式160mS • CMOS输出,低电平有效,支持多键 • 有效键最长输出16S • 无触摸4S自动校准 • 专用脚接对地电容调节灵敏度(1-47nF) • 各触摸通道单独接对地小电容微调灵敏度(0-50pF) • 上电0.25S内为稳定时间,禁止触摸 • 封装SOP8-EP(150mil)(4.9mm x 3.9mm PP=1.27mm) 产品型号:VK3601 产品品牌:VINKA/永嘉微电 封装形式:SOT23-6 产品年份:新年份 联 系 人:陈锐鸿 概述: VK3601 是一款单触摸通道带1个逻辑控制输出的电容式触摸芯片。 特点和优势: • 可通过触摸实现各种逻辑功能控制,操作简单、方便实用 • 可在有介质(如玻璃、亚克力、塑料、陶瓷等)隔离保护的情况下实现触摸功能,安全性高。 • 应用电压范围宽,可在 2.4~5.5V 之间任意选择 • 应用电路简单,外围器件少,加工方便,成本低 • 低待机工作电流(没有负载) @VDD=3.3V,典型值 4uA,最大值 8uA。@VDD=5.0V,典型值 8uA,最大值 16Ua • 专用管脚接外部电容(1nF-47nF)调灵敏度 • 抗电源干扰及手机干扰特性好。EFT 可以达到±2KV 以上;近距离、多角度手机干扰情况下, 触摸响应灵敏度及可靠性不受影响。 • 上电后的初始输出状态由上电前 AHLB 的输入状态决定。AHLB 管脚接 VDD(高电平)或者悬空上电,上电后SO 输出高电平;AHLB 管脚接 GND(低电平)上电,上电后SO输出低电平。•按住 TI,对应 SO的输出状态翻转;松开后回复初始状态 • 上电后约为0.25秒的稳定时间,此期间内不要触摸检测点,此时所有功能都被禁止 • 自动校准功能刚上电的4秒内约62.5毫秒刷新一次参考值,若在上电后的4秒内有触摸按键或4秒后仍未触摸按键,则重新校准周期切换时间约为1秒 • 4S无触摸进入待机模式 ————————————————— 标准触控IC-电池供电系列: VKD223EB --- 工作电压/电流:2.0V-5.5V/5uA-3V 感应通道数:1 通讯界面 最长回应时间快速模式60mS,低功耗模式220ms 封装:SOT23-6 VKD223B --- 工作电压/电流:2.0V-5.5V/5uA-3V 感应通道数:1 通讯界面 最长回应时间快速模式60mS,低功耗模式220ms 封装:SOT23-6 VKD233DB --- 工作电压/电流:2.4V-5.5V/2.5uA-3V 1感应按键 封装:SOT23-6 通讯界面:直接输出,锁存(toggle)输出 低功耗模式电流2.5uA-3V VKD233DH ---工作电压/电流:2.4V-5.5V/2.5uA-3V 1感应按键 封装:SOT23-6 通讯界面:直接输出,锁存(toggle)输出 有效键最长时间检测16S VKD233DS --- 工作电压/电流:2.4V-5.5V/2.5uA-3V 1感应按键 封装:DFN6(2*2超小封装) 通讯界面:直接输出,锁存(toggle)输出 低功耗模式电流2.5uA-3V VKD233DR --- 工作电压/电流:2.4V-5.5V/1.5uA-3V 1感应按键 封装:DFN6(2*2超小封装) 通讯界面:直接输出,锁存(toggle)输出 低功耗模式电流1.5uA-3V VKD233DG --- 工作电压/电流:2.4V-5.5V/2.5uA-3V 1感应按键 封装:DFN6(2*2超小封装) 通讯界面:直接输出,锁存(toggle)输出 低功耗模式电流2.5uA-3V VKD233DQ --- 工作电压/电流:2.4V-5.5V/5uA-3V 1感应按键 封装:SOT23-6 通讯界面:直接输出,锁存(toggle)输出 低功耗模式电流5uA-3V VKD233DM --- 工作电压/电流:2.4V-5.5V/5uA-3V 1感应按键 封装:SOT23-6 (开漏输出) 通讯界面:开漏输出,锁存(toggle)输出 低功耗模式电流5uA-3V VKD232C --- 工作电压/电流:2.4V-5.5V/2.5uA-3V 感应通道数:2 封装:SOT23-6 通讯界面:直接输出,低电平有效 固定为多键输出模式,内建稳压电路 MTP触摸IC——VK36N系列抗电源辐射及手机干扰: VK3601L --- 工作电压/电流:2.4V-5.5V/4UA-3V3 感应通道数:1 1对1直接输出 待机电流小,抗电源及手机干扰,可通过CAP调节灵敏 封装:SOT23-6 VK36N1D --- 工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:1 1对1直接输出 触摸积水仍可操作,抗电源及手机干扰,可通过CAP调节灵敏封装:SOT23-6 VK36N2P --- 工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:2 脉冲输出 触摸积水仍可操作,抗电源及手机干扰,可通过CAP调节灵敏封装:SOT23-6 VK3602XS ---工作电压/电流:2.4V-5.5V/60UA-3V 感应通道数:2 2对2锁存输出 低功耗模式电流8uA-3V,抗电源辐射干扰,宽供电电压 封装:SOP8 VK3602K --- 工作电压/电流:2.4V-5.5V/60UA-3V 感应通道数:2 2对2直接输出 低功耗模式电流8uA-3V,抗电源辐射干扰,宽供电电压 封装:SOP8 VK36N2D --- 工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:2 1对1直接输出 触摸积水仍可操作,抗电源及手机干扰,可通过CAP调节灵敏封装:SOP8 VK36N3BT ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:3 BCD码锁存输出 触摸积水仍可操作,抗电源及手机干扰,可通过CAP调节灵敏 封装:SOP8 VK36N3BD ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:3 BCD码直接输出 触摸积水仍可操作,抗电源及手机干扰,可通过CAP调节灵敏 封装:SOP8 VK36N3BO ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:3 BCD码开漏输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP8/DFN8(超小超薄体积) VK36N3D --- 工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:3 1对1直接输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N4B ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:4 BCD输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N4I---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:4 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N5D ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:5 1对1直接输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N5B ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:5 BCD输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N5I ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:5 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N6D --- 工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:6 1对1直接输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N6B ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:6 BCD输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N6I ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:6 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N7B ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:7 BCD输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N7I ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:7 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N8B ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:8 BCD输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N8I ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:8 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N9I ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:9 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) VK36N10I ---工作电压/电流:2.2V-5.5V/7UA-3V3 感应通道数:10 I2C输出 触摸积水仍可操作,抗电源及手机干扰 封装:SOP16/DFN16(超小超薄体积) 1-8点高灵敏度液体水位检测IC——VK36W系列 VK36W1D ---工作电压/电流:2.2V-5.5V/10UA-3V3 1对1直接输出 水位检测通道:1 可用于不同壁厚和不同水质水位检测,抗电源/手机干扰封装:SOT23-6 备注:1. 开漏输出低电平有效 2、适合需要抗干扰性好的应用 VK36W2D ---工作电压/电流:2.2V-5.5V/10UA-3V3 1对1直接输出 水位检测通道:2 可用于不同壁厚和不同水质水位检测,抗电源/手机干扰封装:SOP8 备注:1. 1对1直接输出 2、输出模式/输出电平可通过IO选择 VK36W4D ---工作电压/电流:2.2V-5.5V/10UA-3V3 1对1直接输出 水位检测通道:4 可用于不同壁厚和不同水质水位检测,抗电源/手机干扰封装:SOP16/DFN16 备注:1. 1对1直接输出 2、输出模式/输出电平可通过IO选择 VK36W6D ---工作电压/电流:2.2V-5.5V/10UA-3V3 1对1直接输出 水位检测通道:6 可用于不同壁厚和不同水质水位检测,抗电源/手机干扰封装:SOP16/DFN16 备注:1. 1对1直接输出 2、输出模式/输出电平可通过IO选择 VK36W8I ---工作电压/电流:2.2V-5.5V/10UA-3V3 I2C输出 水位检测通道:8 可用于不同壁厚和不同水质水位检测,抗电源/手机干扰封装:SOP16/DFN16 备注:1. IIC+INT输出 2、输出模式/输出电平可通过IO选择 KPP878
标签: 3603 VK 脚位 电源供电 电子秤 触摸检测 芯片
上传时间: 2022-04-14
上传用户:shubashushi66
随着科技的发展,人们在日常生活中使用的电器越来越多,电子设备的电磁兼容性(EMC)也越来越重要。所以,人们对电子设备的电磁兼容性的要求也越来越严格,越来越规范。而在市场竞争中,如何降低成本、减少设备体积,是各电子设备制造厂家重点研究的课题。通过对开关电源的EMI滤波电路的类别和相应的技术特点进行分析,设计出一种既能提高性能,又能降低成本的滤波电路。With the development of technology, appliances people use in their daily lives, more and more electronic devices electromagnetic compatibility ( EMC ) has become increasingly important. So, people electromagnetic compatibility requirements of electronic devices have become increasingly stringent, more and more standardized. The competition in the market, how to reduce costs, reduce equipment size, is the subject of the electronic equipment manufacturer focused on research. Through the technical characteristics of the respective category and the EMI filter circuit switching power supply is analyzed both designed to improve a performance of the filter circuit can reduce the cost.
上传时间: 2022-04-23
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