概述

　　可实现手势识别功能的住宅新风系统是一种被广泛应用在家庭，不仅可以有效过滤室内空气中PM2.5、甲醛等有害物质，还可以持续输入新鲜空气的机器。它具有不间断地输入新鲜空气、实时监测室内空气指标、自动净化空气、调节室内空气湿度以及远程通讯等功能，除此之外，更有特色的是，在人机交互中，它还可以实现手势识别控制功能。

　　优势

　　· 高精度温湿度传感器(Si7021)，温度±0.4℃、湿度±3%，封装3x3 mm，并带专利保护盖，可以精准检测空气温湿度并有防尘的作用。

【Si7021】

带 I2C 接口的 Si7021-A20-IM1 数字相对湿度和温度传感器

Si7021-A20-IM1 数字相对湿度和温度传感器将湿度和温度传感器元件、一个模拟数字转换器、信号处理功能以及一个 I2C 接口集成到单一芯片中。Si7021-A20-IM1 具有 ±0.4 °C 的温度精度和 ±3% 的相对湿度精度。创新性 CMOS 设计还为相对湿度和温度传感器提供业内最低功耗。凭借完全的工厂校准，Si7021-A20-IM1 在 PCB 装配期间不需要额外的相对湿度/温度校准。

规格摘要

温度精度最大值 (C):±0.4

相对湿度精度最大值：±3%

温度范围下限 (ºC)：-40

温度范围上限 (ºC)：125

滤波器盖：是

封装格式：绝缘卷带

封装类型：DFN6

【Si7020】

I2C HUMIDITY AND TEMPERATURE SENSOR

Features

> Precision Relative Humidity Sensor

》 ± 4% RH (max), 0–80% RH

> High Accuracy Temperature Sensor

》±0.4 °C (max), –10 to 85 °C

> 0 to 100% RH operating range

> Up to –40 to +125 °C operatingrange

> Wide operating voltage(1.9 to 3.6 V)

> Low Power Consumption

》150 µA active current

》60 nA standby current

> Factory-calibrated

> I2C Interface

> Integrated on-chip heater

> 3x3 mm DFN Package

> Excellent long term stability

> Optional factory-installed cover

》Low-profile

》Protection during reflow

》Excludes liquids and particulates

Applications

> HVAC/R

> Thermostats/humidistats

> Respiratory therapy

> White goods

> Indoor weather stations

> Micro-environments/data centers

> Automotive climate control and defogging

> Asset and goods tracking

> Mobile phones and tablets

Description

The Si7020 I2C Humidity and Temperature Sensor is a monolithic CMOS IC integrating humidity and temperature sensor elements, an analog-to-digital converter, signal processing, calibration data, and an I2C Interface. The patented use of industry-standard, low-K polymeric dielectrics for sensing humidity enables the construction of low-power, monolithic CMOS Sensor ICs with low drift and hysteresis, and excellent long term stability.

The humidity and temperature sensors are factory-calibrated and the calibration data is stored in the on-chip non-volatile memory. This ensures that the sensors are fully interchangeable, with no recalibration or software changes required.

The Si7020 is available in a 3x3 mm DFN package and is reflow solderable. It can be used as a hardware- and software-compatible drop-in upgrade for existing RH/ temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing over a wider range and lower power consumption. The optional factory-installed cover offers a low profile, convenient means of protecting the sensor during assembly (e.g., reflow soldering) and throughout the life of the product, excluding liquids (hydrophobic/oleophobic) and particulates.

The Si7020 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring humidity, dew-point, and temperature, in applications ranging from HVAC/R and asset tracking to industrial and consumer platforms.

Functional Block Diagram

　　· 宽感应范围手势检测传感器(Si1153)，最远2米感应距离，封装2.9x4.9 mm，兼具红外及环境光检测功能，在空气净化器中，具有手势识别及环境光检测的功能，可实现手势控制住宅新风系统。

【Si1153】

Proximity/Ambient Light Sensor IC with I2C Interface

The Si1153-AA00/AA09/AA9x is an ambient light sensor, proximity, and gesture detectorwith I2C digital interface and programmable-event interrupt output.

This touchless sensor IC includes dual 23-bit analog-to-digital converters, an integratedhigh-sensitivity array of visible and infrared photodiodes, a digital signal processor, andthree integrated LED drivers with programmable drive levels. The Si1153 offers excellentperformance under a wide dynamic range and a variety of light sources, includingdirect sunlight. The Si1153 can also work under dark glass covers. The photodiode responseand associated digital conversion circuitry provide excellent immunity to artificiallight flicker noise and natural light flutter noise. With two or more LEDs, the Si1153 iscapable of supporting multiple-axis proximity motion detection. The Si1153 is provided ina 10-lead 2x2 mm DFN package or in a 10-lead 2.9x4.9 mm LGA module with integratedLED, and is capable of operation from 1.62 to 3.6 V over the –40 to +85 °C temperaturerange.

KEY FEATURES

• Proximity detector

• From under 1 cm, to 50 cm withoutadditional lensing.

• From under 1 cm, to 200 cm with additional lensing (e.g., 5 mm hemispherical lens as in our EVB).

• Up to three independent LED drivers.

• 30 current settings from 5.6 mA to 360mA for each LED driver.

• Operates in direct sunlight with optionalon-die 940 nm passband filter.

• On die 940 bandpass filter that rejectsunwanted visible light and IR fromdaylight and other sources (Si1153-AA09/AA9X).

• Ambient light sensor

• <100 mlx resolution possible, allowingoperation under dark glass.

• Up to 128 klx dynamic range possibleacross two ADC range settings.

• Industry’s lowest power consumption

• 1.62 to 3.6 V supply voltage.

• 9 μA average current (LED pulsed 25.6μs every 800 ms at 180 mA plus 3 μASi1153 supply).

• <500 nA standby current.

• 25.6 μs LED “on” time keeps total powerconsumption duty cycle low withoutcompromising performance or noisecommunity.

• Internal and external wake support.

• Built-in voltage supply monitor andpower-on reset controller.

APPLICATIONS

• Wearables

• Handsets

• Display backlighting control

• Consumer electronics

1. Feature List

• Proximity detector

• From under 1 cm to 50 cm without additional lensing.

• From under 1 cm to 200 cm with additional lensing (e.g., 5mm hemispherical lens).

• Up to three independent LED drivers.

• 30 current settings from 5.6 mA to 360 mA for each LEDdriver.

• Operates in direct sunlight with optional on-die 940 nmpassband filter.

• On die 940 bandpass filter that rejects unwanted visible lightand IR from daylight and other sources (Si1153- AA09/AA9X).

• Ambient light sensor

• <100 mlx resolution possible, allowing operation under darkglass.

• Up to 128 klx dynamic range possible across two ADCrange settings.

• Industry’s lowest power consumption

• 1.62 to 3.6 V supply voltage.

• 9 μA average current (LED pulsed 25.6 μs every 800 ms at180 mA plus 3 μA Si1153 supply).

• <500 nA standby current.

• 25.6 μs LED “on” time keeps total power consumption dutycycle low without compromising performance or noise community.

• Internal and external wake support.

• Built-in voltage supply monitor and power-on reset controller.

• Trim-able internal oscillator with typical 1% accuracy.

• I2C Serial communications

• Up to 3.4 Mbps data rate.

• Slave mode hardware address decoding.

• Two package options:

• 10-lead 2 x 2 x 0.65 mm DFN

• 10-lead 2.9 x 4.9 x1.2 mm LGA module with integrated 940nm LED

• Temperature Range: –40 to +85 °C

　　· 性能优越的蓝牙通讯模块(BGM121)，最高发射功率达+8dBm，集成了包括天线在内的所有蓝牙电路，且尺寸仅为6.5x6.5mm，可以很方便的集成到住宅新风系统中并减少客户开发时间。

【BGM121】

Blue Gecko BGM121 蓝牙® 模块 - SiP

全球最小的蓝牙 SiP 模块

Silicon Labs 的 BGM121 Blue Gecko SiP 蓝牙模块拥有 +8 dBm 的发射功率，专门为对超小尺寸、可靠高性能 RF、低功耗和简单应用开发等方面有较高要求的应用精心研发。6.5 x 6.5 x 1.4 毫米的封装使 BGM121 模块成为空间受限型应用的理想之选。BGM121 还集成有极为结实耐用的高性能天线，只需要极少的 PCB、塑料和金属间隙。BGM121 所需要的 PCB 总面积仅为 51 平方毫米。BGM121 还集成有符合 Bluetooth 4.2 要求的蓝牙堆栈，既可在板上运行最终用户应用，也可用作主机接口之一的网络协处理器。

模块优势

集成蓝牙收音机和天线：

出色的射频性能

集成的高性能天线

快速的上市时间和较低的研发成本

蓝牙和法规认证：

最低终端产品认证

更快的上市时间

久经验证的平台

经过预组装和预测试的平台：

模块经过预先组装

收音机经过预先测试

固件经过预先安装

模块规格

蓝牙低能耗产品社区支持

兼容蓝牙 4.2

蓝牙 5 广告

低功耗无线片上系统：

具有 DSP 指令和浮点单元以实现高效信号处理的 32 位 38.4 MHz ARM® Cortex®-M4

256 kB 闪存程序内存

32 kB RAM 数据内存

2.4 GHz 收音机操作

8 dBm 发射功率

低能耗：

8.7 mA RX 电流 @ 2.4 GHz

8.2 mA TX 电流 @ 0 dBm 输出功率 @ 2.4 GHz

63 μA/MHz(活动模式 (EM0))

2.5 μA EM2 深度睡眠电流(完全 RAM 保留并从 LFXO 运行 RTCC)

2.1 μA EM3 停止电流(状态/RAM 保留)

带有信号强度检测、前导码模式检测、帧检测和超时功能的收音机唤醒

卓越接收器性能：

-90 dBm 灵敏度 @ 1 Mbit/s GFSK (2.4 GHz)

宽工作范围：

1.85 V 到 3.8 V 单电源

使用 DC-DC 时的工作范围为 2.4 V 至 3.8 V

集成 DC-DC

-40 至 +85 摄氏度

网络安全性支持：

通用型 CRC

随机数发生器

用于 AES 128/256、SHA-1、SHA-2(SHA-224 和 SHA-256)和 ECC 的硬件加密加速

尺寸：

6.5 x 6.5 x 1.4 毫米

广泛的 MCU 外围设备选择：

12 位 1 Msps SAR 模数转换器 (ADC)

2 × 模拟比较器 (ACMP)

数模电流转换器 (IDAC)

32 个连接至模拟通道 (APORT) 并在模拟比较器、ADC 和 IDAC 之间共享的引脚 32 个带输出状态保持和异步中断功能的通用 I/O 引脚

8 通道 DMA 控制器

12 通道周边反射系统 (PRS)

2 × 16 位计时器/计数器

3 + 4 比较/捕获/PWM 通道

32 位实时计数器和日历

用于波形生成的 16 位低能耗计时器

可从任何能耗模式定期唤醒的 32 位超低能耗计时器/计数器

16 位脉冲计数器(异步操作)

看门狗定时器(带专用阻容振荡器 @ 50 nA)

2 × 通用同步/异步接收器/发射器 (UART/SPI/SmartCard (ISO 7816)/IrDA/I²S)

低能耗 UART (LEUART™)

带 SMBus 支持和 EM3 停止模式下的地址识别的 I²C 接口

BGM121系列

BGM121A256V2

BGM121A256V2R

BGM121N256V2

BGM121N256V2R

　　· 长距离Sub-G无线通讯芯片(Si4438)，最高发射功率 20dBm、接收灵敏度-124dBm，可穿 10堵墙，非常适合应用在住宅新风系统的使用环境，轻松实现穿墙、跨楼层通讯等。

【Si4438】

HIGH-PERFORMANCE, LOW-CURRENT TRANSCEIVER

Features

> Frequency range = 425–525 MHz

> Receive sensitivity = –124 dBm

> Modulation

》(G)FSK

》OOK

> Max output power

》+20 dBm

> Low active power consumption

》14 mA RX

> Ultra low current powerdown modes

》30 nA shutdown, 50 nA standby

> Data rate = 100 bps to 500 kbps

> Fast wake and hop times

> Power supply = 1.8 to 3.6 V

> Excellent selectivity performance

》58 dB adjacent channel

》75 dB blocking at 1 MHz

> Antenna diversity and T/R switch control

> Highly configurable packet handler

> TX and RX 64 byte FIFOs

> Auto frequency control (AFC)

> Automatic gain control (AGC)

> Low BOM

> Low battery detector

> Temperature sensor

> 20-Pin QFN package

> IEEE 802.15.4g ready

> China regulatory

Applications

> China smart meters

Description

Silicon Laboratories' Si4438 is a high-performance, low-currenttransceivers covering the sub-GHz frequency bands from 425 to525 MHz. The Si4438 is targeted at the Chinese smart meter market andis especially suited for electric meters. This device is footprint- andpin-compatible with the Si446x radios, which provide industry-leadingperformance for worldwide sub-GHz applications. The radios are part ofthe EZRadioPRO® family, which includes a complete line of transmitters,receivers, and transceivers covering a wide range of applications. Allparts offer outstanding sensitivity of –124 dBm while achieving extremelylow active and standby current consumption. The 58 dB adjacent channelselectivity with 12.5 kHz channel spacing ensures robust receiveoperation in harsh RF conditions. The Si4438 offers exceptional outputpower of up to +20 dBm with outstanding TX efficiency. The high outputpower and sensitivity results in an industry-leading link budget of 144 dBallowing extended ranges and highly robust communication links.

Functional Block Diagram

　　相关元件供应

　　型号：EFM8BB21F16G-C-QFN20R              品牌：SILICON LABS

　　型号：X1E000021016900                            品牌： EPSON

　　型号：SI4438-C2A-GMR                              品牌：SILICON LABS

　　型号：X1E000021048100                             品牌： EPSON

　　型号：X1E000021011900                             品牌：EPSON

　　型号：SI4438-B1C-FMR                                品牌：SILICON LABS

【新风系统】

　　新风系统是由送风系统和排风系统组成的一套独立空气处理系统，它分为管道式新风系统和无管道新风系统两种。管道式新风系统由新风机和管道配件组成，通过新风机净化室外空气导入室内，通过管道将室内空气排出;无管道新风系统由新风机组成，同样由新风机净化室外空气导入室内。相对来说管道式新风系统由于工程量大更适合工业或者大面积办公区使用，而无管道新风系统因为安装方便，更适合家庭使用。奥斯顿·淳以1935年，在经过多番尝试后发明、制造出了世界上第一台可以过滤空气污染的热交换设备，也称之为新风系统。

　　新风系统是根据在密闭的室内一侧用专用设备向室内送新风，再从另一侧由专用设备向室外排出，在室内会形成“新风流动场”，从而满足室内新风换气的需要。实施方案是：采用高风压、大流量风机、依靠机械强力由一侧向室内送风，由另一侧用专门设计的排风风机向室外排出的方式强迫在系统内形成新风流动场。在送风的同时对进入室内的空气进过滤、灭毒、杀菌、增氧、预热(冬天)。