CN1182249A - 红外物体探测器 - Google Patents
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Abstract
一种红外物体探测器,包括;一对光接收透镜,红外传感器组件,一对热电装置,一对场效应晶体管(FETs),一对安装在红外传感组件的锥形绝缘衬底下方的电阻片,一个硅滤波器,以及密封件;和信号处理器,其用于处理来自红外传感器组件的输出信号,其中通过信号处理器的输出信号确定位于探测区域中的物体位置,所述探测区域由光接收透镜的光接收视界的交叉部分限定。
Description
本发明涉及一种采用红外热电装置的物体探测器。
通常,将带有红外传感器的物体探测器用于自动门的控制装置或防盗报警系统中。这种红外物体探测器感测出现在特定探测区域中的物体。图1表示在日本专利公报平成4-324329中公开的常规物体探测器。常规的物体探测器具有用于感测物体的传感器100和用于对感测到的物体信息进行信号处理的信号处理器200。
参照图1,在传感器100两端的前表面上装有光接收窗110和120,而在光接收窗110和120的周围设有用于确定光接收窗视界的遮光板130和140。在光接收窗110和120的后面分别设置与信号处理器200相连的红外透镜150、160和红外传感器组件170、180。
参照图2,红外传感器组件170包括位于外壳171中的热电装置172和场效应晶体管(FET)173。热电装置172检测穿过光接收窗110的红外光,并输出相应的电信号。该信号由FET173进行阻抗转换后输出到图1的信号处理器200。
从红外传感器组件170和180输出的信号分别由信号处理器200的放大器211和212放大,然后送到比较器221和222。通过与门230对比较器211和222的输出信号进行处理。利用与门230的输出信号可以确定在探测区域中是否存在物体。
在上述传统的红外物体探测器中,把能够测到物体的探测区域D(见图1)确定为一对光接收窗110和120的光接收视界彼此交叉的部分。也就是说,当物体进入探测区D时,从位于各光接收窗110和120后面的红外传感器组件170、180输出的信号发生周期性重叠。因此,可以确定出在探测区域D中是否存在物体。
然而,如果物体进入离传感器100短距离或远距离的区域内,那么就不可能发生信号重叠,从而很难确定是否存在物体。此外,由于物体的探测区限定在两维范围,所以不能以三维形式确定存在的物体。另外,由于具有传感器组件的传感器100体积过大,所以很难使所用的传统红外物体探测器适用于象摄像机这样的小型产品,而且热电装置的输出信号随环境温度的变化而改变,因此降低了用于例如对空调器的输出信号进行最佳控制的传统红外物体探测器的可靠性。
为了克服上述已有技术的问题,本发明的一个目的在于提供一种用于高精度确定物体在探测区中的位置,同时建立三维区域并消除环境温度影响的红外物体探测器。
本发明的另一个目的在于提供一种用于空调器的红外物体探测器,该探测器能够通过高精度确定物体在探测区内的位置,同时建立三维区域和消除环境温度的影响而得到最佳的空调器输出。
为了实现上述目的,所提供的红外物体探测器包括:一对光接收透镜,每个透镜由两个半球形透镜构成而且每个透镜安装在印刷电路板的表面上并具有内部间隙;安装在内部间隙中的红外传感器组件,该组件与印刷电路板电性连接并且具有一个锥形绝缘衬底;一对热电装置,其分别安装在锥形绝缘衬底的锥形表面两相对侧上;一对安装在锥形绝缘衬底不同部分上的场效应晶体管(FETs);一对分别与FETs相对应地安装在锥形绝缘衬底下方的电阻片;一个固定在光接收透镜和锥形绝缘衬底之间的硅滤波器;以及用于密封内部间隙的密封件;和设置在印刷电路板上的信号处理器,其用于处理来自红外传感器组件的输出信号,其中通过信号处理器的输出信号确定位于探测区域中的物体位置,所述探测区域由光接收透镜的光接收视界的交叉部分限定。
为实现另一个目的,提供了一种用于空调器的红外物体探测器,该探测器包括:一对光接收透镜,每个透镜由两个半球形透镜构成而且每个透镜安装在印刷电路板的表面上,并留有内部间隙;安装在内部间隙中的红外传感器组件,该组件与印刷电路板电性连接并且具有锥形绝缘衬底,一对热电装置,其分别安装在锥形绝缘衬底的锥形表面两相对侧上;一对安装在锥形绝缘衬底不同部分上的场效应晶体管(FETs);一对分别与FET相应地安装在锥形绝缘衬底下方的电阻片,一个固定在光接收透镜和锥形绝缘衬底之间的硅滤波器;以及用于密封内部间隙的密封件;设置在印刷电路板上的信号处理器,其用于处理来自红外传感器组件的输出信号;和利用从信号处理器输出的信号确定物体在探测区域中的位置并根据确定结果输出控制空调器工作的信号的微计算机,所述探测区域由光接收透镜的光接收视界交叉部分限定。
通过参照附图详细地描述本发明的优选实施例将会使本发明的上述目的和优点变得更加明显。其中:
图1是传统红外物体探测器的示意图;
图2是图1所示传统红外物体探测器的红外传感器组件的剖面图;
图3是表示本发明的红外物体探测器和物体探测区的平面图;
图4是设在本发明的红外物体探测器中的红外传感器组件的剖面图;
图5是表示用于空调器中的本发明的红外物体探测器的示意性方框图;
图6是根据本发明另一实施例的红外物体探测器的绝缘衬底的剖面图;
参照图3,本发明的红外物体探测器包括一对光接收透镜301,一对安装在光接收透镜301中的红外传感器组件300,和印刷电路板310,印刷电路板上带有信号处理器,用于处理从红外传感器组件300输出的信号。
每个光接收透镜301都是由两个半球形透镜或两个Fresnel透镜构成的。
参照图4,每个红外传感器组件300包括一个锥形绝缘衬底330,其具有锥形表面330a和330b,分别安装在绝缘衬底330的锥形表面330a和330b两相对侧上的一对热电装置331和332,一对位于绝缘衬底330下方的电阻片333和334,一对分别相应于电阻片333和334设置在绝缘衬底330上的FETs335和336,和设置在光接收透镜301和绝缘衬底330之间的硅滤波器340。绝缘衬底330由密封件320密封并通过导线柱338电性连接到印刷电路板310上。
绝缘衬底330由绝缘材料例如氧化铝或FR4构成,而且在锥形表面的尖端处安装有衰减器337。此外,热电装置331和332是例如PZT、PLT、或聚合物构成的薄膜或薄片。
如上所述,由两个半球形透镜构成的每个光接收透镜301和锥形绝缘衬底300使本发明的红外物体探测器可以具有如图3所示的多个探测区A,B,C,D,E和F。即,把包含区域B的区域A和C确定为短距离探测区,其中区域B由光接收透镜301的光接收视界彼此交叉而获得。同样,把包含区域E的区域D和F确定为长距离探测区,其中区域E是光接收视界彼此交叉得到的区域。例如,当一个物体例如一个人进入区域D、E或F时,通过图4中的硅滤波器340传输的热能小于物体处于区域A、B或C中时的热能。在此基础上,由印刷电路板310上的信号处理器对来自热电装置331和332的电压进行比较并确定在长距离探测区中是否存在物体。
锥形绝缘衬底330可防止在锥形表面330a和330b相对侧上接收到的光强度和热能之间的相互干扰,由此消除了环境温度的影响。设置在锥形表面330a顶端上的衰减器337能进一步减小环境温度的影响。
如图3所示,本发明的红外物体探测器与装置主体400例如空调器或摄像机的主电路板相连。图5表示将本发明的红外物体探测器与空调器相连的情况。把图3中适用于红外物体探测器的印刷电路板310上的信号处理器310′连接到空调器的微计算机400′上。信号处理器310′包括分别与每个红外传感器组件331和332中的热电装置331和332相连的放大器360,和分别与放大器360相连的比较器370。在这种结构中,例如,当一个人处于图3所示的一个探测区域中时,热电装置331和332检测区域中的温度变化并把温度变化转换成电信号。放大器360接收该电信号并将其放大。比较器370把经放大的信号转换成可被微计算机400′接收的数字信号。然后,用微计算机400′中包含的程序对信号进行处理以便确定探测区中的人是处在短距离、中距离、还是远距离。根据表示人的数量、位置和运动状态的确定结果,微计算机400′控制空调器以有效的方式工作。通过输出散热信号Lo使空气流向人所在的区域或输出信号Fo来控制风扇的转速即可实现这一目标。因此,空调器总是能以最有效地工作来改变室内的条件。
同时,图6表示根据本发明另一实施例的红外物体探测器的绝缘衬底330′。在此,用相同的标号表示与上述附图中相同的部件。如图中所示,水平部分330c、330d形成在绝缘衬底330′的锥形表面330a、330b的顶部和基部之间的中部位置上。热电装置331′和332′分别安装在相对两侧的水平部分330c、330d上。
如上所述,红外物体探测器能够通过由两个半球形透镜和锥形绝缘衬底构成的光接收透镜建立三维探测区,并能高精度地确定物体在探测区中的位置,同时消除环境温度的影响。此外,在把本发明的红外物体探测器用于例如空调器的情况下,能够确定物体的位置,由此控制空调器最有效地工作。而且,由于本发明的红外物体探器能够做得比传统的探测器小,所以当把这种探测器用照相机或集拍摄于一体的摄相机时能够更精确地确定物体的位置。
Claims (6)
1.一种红外物体探测器,包括:
一对光接收透镜,每个透镜由两个半球形透镜构成而且每个透镜安装在印刷电路板的表面上,并具有内部间隙;
安装在所述内部间隙中的红外传感器组件,该组件与所述印刷电路板电性连接并且具有一个锥形绝缘衬底,一对热电装置,其分别安装在所述锥形绝缘衬底的锥形表面的两相对侧上,一对安装在所述锥形绝缘衬底不同部分上的场效应晶体管(FETs),一对与所述FETs相对应分别安装在锥形绝缘衬底下方的电阻片,一个位于所述光接收透镜和所述锥形绝缘衬底之间的硅滤波器,以及用于密封所述内部间隙的密封件;和
设置在印刷电路板上的信号处理器,用于处理来自红外传感器组件的输出信号,其中通过所述信号处理器的输出信号确定物体在探测区域中的位置,所述探测区域由光接收透镜的光接收视界的交叉部分限定。
2.根据权利要求1所述的红外物体探测器,其中所述光接收透镜是半球形透镜和Fresnel透镜中的一种。
3.根据权利要求1所述的红外物体探测器,其中在所述锥形绝缘衬底顶部和基部之间的中部处且在所述锥形绝缘衬底的锥形表面上形成一个水平部分,而且所述热电装置安装在所述水平部分上。
4根据权利要求1所述的红外物体探测器,其中在所述锥形绝缘衬底的顶端安装有衰减器。
5.根据权利要求1所述的红外物体探测器,其中所述锥形绝缘衬底由氧化铝构成。
6.一种用于空调器的红外物体探测器,包括:
一对光接收透镜,每个透镜由两个半球形透镜构成而且每个透镜安装在印刷电路板的表面上,并具有内部间隙;
安装在所述内部间隙中的红外传感器组件,该组件与所述印刷电路板电性连接并且具有一个锥形绝缘衬底,一对热电装置,其分别安装在所述锥形绝缘衬底的锥形表面的两相对侧上,一对安装在所述锥形绝缘衬底不同部分上的场效应晶体管(FETs),一对与所述FETs相对应分别安装在锥形绝缘衬底下方的电阻片,一个位于所述光接收透镜和所述锥形绝缘衬底之间的硅滤波器,以及用于密封所述内部间隙的密封件;和
设置在印刷电路板上的信号处理器,用于处理来自红外传感器组件的输出信号;
一微处理机,其利用从所述信号处理器输出的信号确定物体在探测区中的位置并按照确定结果输出控制空调器工作的信号,其中所述探测区由所述光接收透镜的光接收视界的交叉部分限定。
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KR52164/96 | 1996-11-05 | ||
KR1019960052164A KR0176625B1 (ko) | 1996-11-05 | 1996-11-05 | 적외선 물체검출장치 |
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CN1182249A true CN1182249A (zh) | 1998-05-20 |
CN1091913C CN1091913C (zh) | 2002-10-02 |
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US (1) | US5986265A (zh) |
JP (1) | JPH10148569A (zh) |
KR (1) | KR0176625B1 (zh) |
CN (1) | CN1091913C (zh) |
GB (1) | GB2319080B (zh) |
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Also Published As
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GB9720420D0 (en) | 1997-11-26 |
GB2319080B (en) | 1999-10-13 |
KR0176625B1 (ko) | 1999-04-01 |
US5986265A (en) | 1999-11-16 |
GB2319080A (en) | 1998-05-13 |
KR19980034199A (ko) | 1998-08-05 |
JPH10148569A (ja) | 1998-06-02 |
CN1091913C (zh) | 2002-10-02 |
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