CN1862249A - 干电池供电主动式红外感应器具的节能处理方法 - Google Patents

干电池供电主动式红外感应器具的节能处理方法 Download PDF

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CN1862249A
CN1862249A CNA2006100258574A CN200610025857A CN1862249A CN 1862249 A CN1862249 A CN 1862249A CN A2006100258574 A CNA2006100258574 A CN A2006100258574A CN 200610025857 A CN200610025857 A CN 200610025857A CN 1862249 A CN1862249 A CN 1862249A
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infrared
mouth
circuit
resistance
pulse
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CN1862249B (zh
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陈伟根
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Shanghai Kohler Electronics Ltd
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Aokelin Water Supply & Heating Equipment Co Ltd Shanghai
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Priority to CN2006100258574A priority Critical patent/CN1862249B/zh
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Priority to CA002649605A priority patent/CA2649605A1/en
Priority to EP07734339A priority patent/EP2010940A4/en
Priority to PCT/IB2007/001020 priority patent/WO2007122475A1/en
Priority to JP2009505987A priority patent/JP2009535006A/ja
Priority to RU2008145755/09A priority patent/RU2008145755A/ru
Priority to MX2008013298A priority patent/MX2008013298A/es
Priority to AU2007242564A priority patent/AU2007242564A1/en
Priority to US12/297,474 priority patent/US8049155B2/en
Priority to KR1020087025436A priority patent/KR20090029688A/ko
Priority to US13/285,965 priority patent/US8274036B2/en
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Priority to US13/618,316 priority patent/US8686344B2/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/94042—Means for reducing energy consumption
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/941—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector
    • H03K2217/94102—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector characterised by the type of activation
    • H03K2217/94108—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector characterised by the type of activation making use of reflection

Abstract

本发明是干电池供电主动式红外感应器具的节能处理方法，属于红外感应控制领域，它是通过红外发光LED发射红外信号，经由物体反射，被红外接收管接收，接收的红外信号通过运放、比较器进入单片机，利用软件判别芯片接收引脚脉冲序列的宽度，动态调节红外发射脉冲信号的宽度，从而降低发射功耗，达到节能的效果。

Description

干电池供电主动式红外感应器具的节能处理方法
所属技术领域：
干电池供电主动式红外感应控制领域。
背景技术：
主动式红外感应方式是通过发射一定波长的红外光线，经由物体反射后，处理其反射信号来实现判别控制的传感方式。由于红外感应器传感器部分是由干电池供电，功耗就成为该产品性能的一个重要指标，为了延长干电池的工作寿命，降低功耗势在必行。现有技术都是通过对硬件电路各个组成部分的精确计算和选型并辅以软件在待机时的周期性休眠功能达到功耗要求，但是在动态使用阶段，并未对红外发射能量进行自动调节，而实际上在动态工作阶段红外发光LED发射红外光线时所占的功耗比率很大。本发明就是在对硬件电路的最优化和软件休眠功能使用的基础上，在保证使用可靠的前提下，通过对红外接收信号反馈强弱的判别处理，动态调节红外发射的脉冲宽度来达到降低功耗的一种方法。
发明内容：
本发明是通过判别接收信号的强弱来调整红外发射脉冲宽度，在此过程中，接收信号强弱判别是在大量实验后通过软件设定实现的。
附图说明：
图1是红外发射接收处理的总体硬件原理图；
图2是图1中比较输出信号处理电路[1]的一种局部图；
图3是图1中比较输出信号处理电路[1]由图2组成时RA2发射的脉冲时序图；
图4是图1中比较输出信号处理电路[1]由图2组成时RA1发射的脉冲时序图；
图5是图1中比较输出信号处理电路[1]由图2组成时RA3接收的脉冲时序图；
图6是图2中比较输出信号处理电路[1]由一条导线组成时运放的基准电平时序图；
图7是图2中比较输出信号处理电路[1]由一条导线组成时RA1发射的脉冲时序图；
图8是图2中比较输出信号处理电路[1]由一条导线组成时RA2接收的脉冲时序图；
图9是图1中比较输出信号处理电路[1]由图2组成时的2个循环流程。
具体实施方式：
此发明可通过以下两种途径实现：
一、通过一段持续的脉冲序列判别接收信号强弱来调整红外发射脉冲宽度。
其硬件原理框图如图1，图1中比较输出信号处理电路[1]由图2组成。其工作原理叙述如下：上电初始化后，单片机[IC]中的RA2输出一组由N个周期为T1、脉宽T2的脉冲组成的脉冲序列，该组脉冲序列总的时间为T3，且每两组脉冲序列发送间隔时间为T[如图3]；在RA2输出第一个脉冲的t1秒后，RA1输出周期(T+T2+T3)、脉宽T5的脉冲信号[如图4中1]，同时导通了NPN型三极管[Q1]，从而驱动了发射管[I]；红外线接收器[P]接收的红外光线转换成电信号通过电阻[R1]、电容[C1]组成的滤波电路后通过[R0、R2]组成的运放基准电平电路输入到运放[A1]正向端，通过电阻[R3、R4]、电容[C2]组成的负反馈回路，放大后由运放[A1]输出，经过由电阻[R5]、电容[C3]组成的滤波电路，输入到比较器[A2]正向端，通过与由电阻[R6、R7]组成的分压电阻组成的比较器负向端比较，输出到PNP型三极管[Q2]的基极，当输入到三极管[Q2]的基极电平低于三极管[Q2]的发射极电平，三极管[Q2]导通，由单片机[IC]中RA3采集计数单元(Q1)的集电极脉冲信号，此时采集到的脉冲数记为n；当输入到三极管[Q2]的基极的电平高于三极管[Q2]的发射极电平，三极管[Q2]截止，RA3采集不到脉冲信号。
脉冲信号判断  符号说明：p，A，a是通过大量实验得到的数据，p表示设定的初始比较脉冲数，A表示单片机[IC]中RA1相应减少的脉宽，a表示设定的递减脉冲数；总的思想是通过单片机中的单片机[IC]中RA3检测到脉冲数目n来判别接收信号强弱，当n＞p时，为弱信号，重新采集脉冲数；当n≤p时，为强信号，具体判断步骤如流程图9，此流程仅描述了2个循环的判别，余下的循环如下：设RA3端口的脉冲信号数目为n，根据n的大小来判别是强信号还是弱信号，当为弱信号则重新采集脉冲数，为强信号时n与在前一循环(p-ma)的基础上再减a(m≥0的整数)的值(即(p-(m+1)a))相比较，如果n＜(p-(m+1)a)，则RA1则在原有输出脉宽(T5-mA)基础上再递减A，继续采集RA3的脉冲信号数目进行如上的循环，这样动态调节可以使发射脉宽变窄，从而达到我们理想的节能效果；如果n≥(p-(m+1)a)，则RA1输出脉宽为(T5-mA)，继续采集RA3口的脉冲信号数目进行上述的循环。
二、通过对接收信号变化的判别触发单片机中断来即时调整红外发射脉冲宽度。
其硬件原理框图如图1，图1中比较输出信号处理电路[1]由一条导线组成，连接到[IC]的RA3，其中RA2悬空。其工作原理叙述如下：上电初始化后，由于运放输入端叠加了一个与红外线接收器[P]电源同步([P]电源是由单片机[IC]一个引脚输出周期T10、脉宽T11的脉冲信号)的基准电平(V)，基准电平由[R0、R2]分压组成，周期为T10、脉宽为T11的脉冲信号[如图6]；延时t2秒后，单片机[IC]的RA1输出周期T10、脉宽T12的高电平脉冲[如图4中1]，此时NPN型三极管[Q1]导通，从而驱动了发射管[I]；红外线接收器[P]接收的红外光线转换成电压信号经过电阻[R1]、电容[C1]组成的滤波电路后通过电阻[R0、R2]组成的分压进入运放[A1]的正向输入端，通过电阻[R3、R4]、电容[C2]组成的负反馈，放大后由运放[A1]的输出端输出到由电阻[R5]、电容[C3]组成的滤波电路，然后进入比较器[A2]的同相输入端，通过与电阻[R6、R7]构成[A2]的反向输入端比较，比较结果输出到RA3，单片机[IC]根据RA3的信号变化来进行时时判别处理。如果RA3在T11周期内采集不到上升沿脉冲[如图8中4]，则判别为弱信号，RA1输出波形[如图7中2]；如果RA3在T11周期内采集到一个上升沿脉冲[如图8中5]，则判别为强信号(判别过程用了t3秒)，根据单片机[IC]检测接收到的外部脉冲信号上升沿触发中断，使RA1本周期输出由高电平立即转变为低电平[如图7中3]，直到下个周期RA1恢复电平脉冲，重新判别RA3的信号变化来进行处理。这样通过中断可时时调节发射脉宽，降低了发射功耗，达到了节能的效果。
以上两种途径中第一种途径相对第二种途径比较繁琐、费功耗，特别是在判别过程中对发射电平脉冲变化的延时性，达不到第二种途径的时时性变化；但是由于第一种途径的主芯片没有中断功能，价格相对便宜。以上两种途径虽然处理方法不太一样，但是原理一样都是利用反馈信号的强弱，通过软件对电平信号的判别，来调整发射脉冲信号，达到节能的效果。
有益效果：
通过软件对红外发射脉宽的自动调节，降低整机功耗，延长了干电池的工作寿命。

Claims (3)

1.一种干电池供电主动式红外感应器具的节能处理方法，其特征是：通过对红外发射脉宽的动态调节，降低发射管的功耗，从而达到节能的目的，包括红外发光电路、红外受光电路，红外发光电路由红外发光LED[1]，电阻[R8，R9]，晶体管[Q1]组成，晶体管的基极通过一个电阻连接到[IC]的RA1口，RA1口输出脉冲序列，当输出为高电平时，晶体管[Q1]导通，此时红外发光LED[1]发射红外光；红外受光电路由红外接收管[P]，滤波电路，分压电路，运算放大器，比较器组成，当接收管接收到信号时，[IC]的RA3口通过采集输入的脉冲数目，动态的调整RA1口输出的脉冲序列的宽度，以达到降低发射功耗的目的。
2.根据权利要求1所述的电路，其特征在于：当芯片[IC]没有中断功能时，比较器[A2]输出信号处理电路[1]由电阻[R10、R11]，晶体管[Q2]组成，电阻[R10]的一端连接比较器[A2]的输出，另一端连接晶体管[Q2]的基极，晶体管[Q2]的集电极连接[IC]的RA2口，发射极连接[IC]的RA3口，电阻[RA3]为发射极电阻，另一端接地。
3.根据权利要求1所述的电路，其特征在于：当芯片[IC]有中断功能时，比较器[A2]输出信号直接连接[IC]的RA3口，RA2口悬空。
CN2006100258574A 2006-04-20 2006-04-20 干电池供电主动式红外感应器具的节能处理方法 Active CN1862249B (zh)

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CN2006100258574A CN1862249B (zh) 2006-04-20 2006-04-20 干电池供电主动式红外感应器具的节能处理方法
MX2008013298A MX2008013298A (es) 2006-04-20 2007-04-19 Metodo de procesamiento y aparato de ahorro de energia de instrumento de induccion activa infrarroja alimentado por bateria seca.
US12/297,474 US8049155B2 (en) 2006-04-20 2007-04-19 Processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery
PCT/IB2007/001020 WO2007122475A1 (en) 2006-04-20 2007-04-19 A processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery
JP2009505987A JP2009535006A (ja) 2006-04-20 2007-04-19 乾電池によって電源供給されるアクティブ赤外線方式誘導型機器のエネルギー節約のための処理方法及び装置
RU2008145755/09A RU2008145755A (ru) 2006-04-20 2007-04-19 Способ и устройство обработки для экономии электроэнергии активного инфракрасного индукционного прибора, питаемого от сухого аккумулятора
CA002649605A CA2649605A1 (en) 2006-04-20 2007-04-19 A processing method and apparatus for energy saving of an active infrared induction instrument powered by dry battery
AU2007242564A AU2007242564A1 (en) 2006-04-20 2007-04-19 A processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery
EP07734339A EP2010940A4 (en) 2006-04-20 2007-04-19 PROCESSING METHOD AND DEVICE FOR SAVING ENERGY IN AN ACTIVE INFRARED INDUCTION INSTRUMENT PROVIDED BY A DRY BATTERY
KR1020087025436A KR20090029688A (ko) 2006-04-20 2007-04-19 건전지에 의해 구동되는 능동 적외 유도 장치의 에너지 절약을 위한 처리방법과 그 기구
US13/285,965 US8274036B2 (en) 2006-04-20 2011-10-31 Processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery
US13/618,316 US8686344B2 (en) 2006-04-20 2012-09-14 Processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery

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US8274036B2 (en) 2006-04-20 2012-09-25 Shanghai Kohler Electronics, Ltd. Processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery
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US8049155B2 (en) 2011-11-01
US20130009061A1 (en) 2013-01-10
US8274036B2 (en) 2012-09-25
EP2010940A4 (en) 2011-11-02
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US8686344B2 (en) 2014-04-01
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US20090309639A1 (en) 2009-12-17
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CN1862249B (zh) 2012-01-04
AU2007242564A1 (en) 2007-11-01
CA2649605A1 (en) 2007-11-01

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