WO2010022663A1 - 距离检测感应装置 - Google Patents

距离检测感应装置 Download PDF

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Publication number
WO2010022663A1
WO2010022663A1 PCT/CN2009/073568 CN2009073568W WO2010022663A1 WO 2010022663 A1 WO2010022663 A1 WO 2010022663A1 CN 2009073568 W CN2009073568 W CN 2009073568W WO 2010022663 A1 WO2010022663 A1 WO 2010022663A1
Authority
WO
WIPO (PCT)
Prior art keywords
distance detecting
lens
receiving
sensing device
transmitting
Prior art date
Application number
PCT/CN2009/073568
Other languages
English (en)
French (fr)
Inventor
汤乔梅
陈国峰
Original Assignee
上海科勒电子科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海科勒电子科技有限公司 filed Critical 上海科勒电子科技有限公司
Priority to EP09809248A priority Critical patent/EP2327957A4/en
Priority to US13/061,102 priority patent/US9007568B2/en
Publication of WO2010022663A1 publication Critical patent/WO2010022663A1/zh

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00Measuring distances in line of sight; Optical rangefinders
    • G01C3/02Details
    • G01C3/06Use of electric means to obtain final indication
    • G01C3/08Use of electric radiation detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/04Systems determining the presence of a target
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06Systems determining position data of a target
    • G01S17/46Indirect determination of position data
    • G01S17/48Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481Constructional features, e.g. arrangements of optical elements
    • G01S7/4811Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G01S7/4813Housing arrangements

Definitions

  • the infrared emitter emits infrared rays of a certain wavelength, and after being reflected by the human body, after receiving through the infrared receiver, the intensity of the reflected signal is judged to realize automatic sensing judgment.
  • some substances with low infrared reflectance such as black clothes, hair, etc.
  • the infrared light of the infrared emitter is reflected by the substances, only a very small amount of infrared light is received by the infrared receiver. Since the intensity of the reflected signal is insufficient, the sensor cannot judge whether or not there is a target, thereby causing the sensor to malfunction.
  • the distance detecting and sensing device controls the working state of the sanitary ware to perform water discharge, flushing, and the like.
  • the distance detecting sensing device determines the distance between the target object and the distance detecting sensing device to achieve the purpose of automatic sensing, instead of determining the intensity of the transmitted signal, the traditional infrared sensing can effectively solve the "induction failure due to insufficient intensity of the reflected signal. "Defects. However, with the distance detecting and sensing device, it is easily affected by the halo of the infrared emitting light, thereby causing problems such as affecting the detection accuracy.
  • a distance detecting sensing device comprising: a housing, a focusing lens, a circuit board mounted with a plurality of electronic components, and a transmitting device for emitting infrared light and receiving the infrared reflected light Receiving device.
  • the housing includes a main body portion and two circular openings on a top surface of the main body portion.
  • the lens includes an emitting lens and a receiving lens disposed at a position of the opening of the housing.
  • the circuit board is installed in the main body of the casing, and is provided with a plurality of electronic components for processing signals;
  • the transmitting device is an infrared light emitting diode mounted on the circuit board to emit infrared light to the emitting lens.
  • the receiving device is a distance detecting sensing module mounted on the circuit board to sense reflected light focused from the receiving lens.
  • the distance detecting and sensing device further includes a light emitting guiding device mounted between the transmitting lens and the emitting device, including a large circular hole at the position of the transmitting lens and a small circular hole at the position of the transmitting die of the transmitting device, wherein The small circular hole and the large circular hole form a tapered infrared light emitting channel.
  • the small circular aperture is smaller than the light emitting surface of the transmitting die.
  • the emission light guiding device further includes an accommodating portion for accommodating the transmitting device, and the accommodating portion is penetrated through the small circular hole.
  • the distance detecting sensing device further includes an indicator light for displaying an operating state or an abnormal condition, the indicator light being mounted on the circuit board and located near the transmitting device.
  • the light emitting guiding device is correspondingly provided with an indicator light display hole.
  • the distance detecting sensing device further includes a seal mounted between the receiving lens and the receiving device.
  • the distance detecting and sensing device further includes a wire arranging device fixed to the casing by screws.
  • the distance detecting and sensing device further includes a shielding cover installed around the transmitting device and the receiving device to prevent electromagnetic interference.
  • the shielding cover is divided into first and second shielding covers that are welded to each other, wherein the first shielding cover is fixed to the housing by screws and is in contact with the circuit board, and the second shielding cover passes through the buckle structure and the housing. Fixed, said The transmitting and receiving device is mounted between the shield and the circuit board. Further, the lens and the housing are mounted together by injection molding. Further, the housing is made of a conductive material.
  • FIG. 1a is a perspective view of a distance detecting and sensing device of the present invention.
  • Figure lb is another perspective view of the distance detecting sensing device of the present invention.
  • 2 is an exploded perspective view of the distance detecting and sensing device of the present invention.
  • 3 is an exploded perspective view of the distance detecting sensing device of the present invention from another angle.
  • 4a is a partially assembled, isometric view of the distance detecting sensing device of the present invention.
  • Figure 4b is another perspective view of Figure 4a.
  • Figure 4c is an exploded perspective view of the structure shown in Figure 4b.
  • Figure 5 is a perspective view of the housing of the distance detecting sensing device of the present invention.
  • Figure 6 is a view of the launch positioning bracket of the distance detecting sensing device of the present invention.
  • Figure 7a is an exploded view of the receiving device of the distance detecting sensing device of the present invention and its positioning bracket.
  • Figure 7b is another perspective view of Figure 7a.
  • Figure 8 is a cross-sectional view along line AA of Figure la.
  • Figure 9 is a schematic diagram of the operation of the prior art distance detecting sensing device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be specifically described below with reference to the drawings in which the same structure or function Marked. It is to be understood that the appended drawings are not intended to be As shown in FIG. 1 to FIG.
  • the distance detecting and sensing device 100 of the present invention is mainly installed in various types of automated sanitary equipment, such as a sensor urinal, a sensor toilet, and a sensor faucet.
  • the distance detecting and sensing device 100 of the present invention mainly comprises: a housing 1, a focusing lens 2, a circuit board 3 provided with a plurality of electronic components, a transmitting device 4 for emitting infrared light, a receiving device 5 for receiving reflected light and sensing, and Shielding cover 6 for electromagnetic shielding.
  • the transmitting device 4 and the receiving device 5 are mounted on the same side of the circuit board 3. In the illustrated embodiment of the invention, the transmitting device 4 and the receiving device 5 are soldered to the circuit board 3 by solder fillets.
  • the lens 2 is fixed to the casing 1, and includes an emitting lens 21 that focuses and emits infrared light rays, and a receiving lens 22 that focuses the reflected light onto the receiving device 5. Since the distance between the transmitting device 4 and the receiving device 5 and the position of the transmitting device 4 and the receiving device 5 and the lens 2 need to have a certain precision, the distance detecting and sensing device 100 of the present invention further includes The positioning bracket 7 of the transmitting device 4 is fixed, and the positioning bracket 8 of the receiving device 5 is fixed. The transmitting and receiving positioning brackets 7, 8 receive the transmitting device 4 and the receiving device 5, and are positioned and cooperated with the housing 1, thereby ensuring the positional accuracy of the transmitting device 4 and the receiving device 5.
  • the shield 6 is shielded from the periphery of the circuit board on the side where the transmitting device 4 and the receiving device 5 are mounted to prevent electromagnetic interference (EMI) of the surrounding environment to the transmitting device 4 and the receiving device 5.
  • the housing 1 includes a vertically long main body portion 10 and first and second circular openings 11 and 12 provided on the top surface of the main body portion 10.
  • the lens 2, the circuit board 3 provided with a plurality of electronic components, the transmitting device 4, the receiving device 5, and the shielding cover 6 are all located in the main body portion 10 of the casing 1.
  • the emitting lens 21 and the receiving lens 22 of the lens 2 are respectively mounted in the first and second circular openings 11, 12.
  • the housing 1 is made of an insulating material (such as ordinary plastic, etc.).
  • the housing 1 may be made of a conductive material (such as metal or conductive plastic) to achieve the desired. Anti-electromagnetic interference effect.
  • the emitting lens 21 of the lens 2 and the receiving lens 22 are mounted in the first and second circular openings 11, 12 of the housing 1 by injection molding. Specifically, how the lens 2 and the housing 1 are mounted The injection molding is performed twice, that is, the lens 2 is first injection molded, and then the injection molded lens 2 is placed in a mold of the casing 1 and integrally molded with the casing 1. The injection molding method not only solves the sealing problem between the lens 2 and the outer casing 1, but also ensures the relative position of the lens 2 at the center and the outer casing 1.
  • the lens 2 and the housing 1 can also be assembled and assembled.
  • the circuit board 3 is integrated with a plurality of electronic components, and the first through hole 31 and the second through hole 32 are disposed on the transmitting lens 21 and the receiving lens 22.
  • the first through hole 31 allows the emission positioning bracket 7 to pass therethrough.
  • the circuit board 3 processes the signals and transmits the processed data to the main controller to further control the sanitary equipment (not shown).
  • the transmitting device 4 is an infrared light emitting diode (IR LED), is mounted on the circuit board 3, and is located on the lower side of the circuit board 3 (as shown in FIG. 2 and FIG. 3, the side of the circuit board 3 facing the lens 2 is an upper side, The other side is the lower side of the circuit board 3).
  • IR LED infrared light emitting diode
  • the transmitting device 4 is further provided with an indicator light 41 for indicating the function of detecting the operating state of the sensing device 100 or an abnormal situation such as insufficient battery power.
  • the receiving device 5 is a distance sensing module (PSD Sensing Module), is mounted on the circuit board 3, and is also located on the lower side of the circuit board 3.
  • the shielding cover 6 is mounted on the bottom of the casing 1 by screws 101 and 102, and shields the transmitting device 4 and the receiving device 5, and includes a first shielding cover 61 and a second shielding cover 62.
  • the first shielding cover 61 is first fixed to the casing 1 and grounded by a slight contact between the screws 101 and 102 and the grounding wire of the circuit board 3.
  • the buckle is fixed to the housing 1 and is in soldering contact with the first shield 61 and is grounded. This arrangement prevents a single mask from being set separately and is not suitable for mounting and fixing.
  • the launch positioning bracket 7 is mounted on the housing 1 and includes a large circular hole 71 at the top end of the bracket and matched with the transmitting lens 21, and a receiving portion 72 at the bottom end of the bracket for receiving the transmitting device 4. The diameter of the large circular hole 71 is substantially equal to the emitting surface of the emitting lens 21.
  • the launch positioning bracket 7 further includes a square boss 74 on both sides of the bracket, the square boss 74 mating with the positioning groove 13 on the inner top surface of the housing 1 to position the launch positioning bracket 7 and the housing 1. It is true that the square boss 74 can also be other shapes mounted on other locations of the launch positioning bracket 7, such as a cylindrical boss.
  • the receiving portion 72 of the launch positioning bracket 7 passes through the first through hole 31 of the circuit board 3 from above the circuit board 3, and the transmitting device 4 is received and positioned on the lower side of the circuit board 3.
  • the soldering legs of the transmitting device 4 are bent and bent by the notches (not labeled) on both sides of the receiving portion 72, and are soldered to the circuit board 3.
  • the launch positioning bracket 7 is made of an insulating material, and may of course be made of a conductive material. When it is made of a conductive material, it can be used as a shield against electromagnetic interference.
  • the launch positioning bracket 7 further includes a small circular hole 75 close to the receiving portion 72 of the transmitting device 4 and an indicator display hole 76 of the indicator light 41. As shown in FIG.
  • the emission small circular hole 75 and the large circular hole 71 form a tapered infrared light emitting channel, which is arranged such that light is emitted from the die of the emitting device 4 through the small circular hole 75, passes through the large circular hole 71, and passes through the emitting lens. 21 shot and shot. Therefore, it is ensured that the emitted light does not hit other areas in the casing 1, affecting efficiency and generating light interference, and is not affected by the reflection and refraction of the internal light to the receiving device 5, thereby affecting the detection effect. At the same time, the emitted light has a large halo due to the large die of the launching device.
  • the infrared rays emitted from the emitter of the emitter housed in the housing portion 72 are emitted only through the small circular holes 75.
  • the small circular hole 75 is smaller than the light emitting surface of the emitting device, and the unnecessary portion is blocked. This setting can also effectively reduce the effect of the halo on the detection signal, which can make the detection accuracy higher.
  • the launch positioning bracket 7 at this time serves as a light guiding means for emitting light.
  • the receiving positioning bracket 8 includes a beam 81 mounted to the housing and a receiving portion 82 that is coupled to the beam 81 to receive the receiving device 5.
  • the accommodating portion 82 has a housing space 821 that houses the receiving device 5.
  • the top surface of the receiving portion 82 is provided with a rectangular opening 820 aligned with the second through hole 32 of the circuit board to facilitate receiving light. It enters the receiving surface of the receiving device 5.
  • the accommodating portion 82 is horizontally extended from the middle portion of the beam 81, so that the welding legs of the receiving device 5 can be easily extended from the notches (not shown) on both sides of the accommodating portion 82 to facilitate the welding.
  • the two free ends of the beam 81 are engaged with the positioning grooves 14 on the two side walls of the main body portion 10 of the housing 1 for effective positioning.
  • the distance detecting and sensing device 100 of the present invention further includes a wire arranging device 9 which can efficiently organize the wires (not shown) on the circuit board 3 and is fixed in the casing 1 by screws 103.
  • the distance detecting and sensing device 100 of the present invention further includes a sealing member 104 between the lens 2 and the circuit board 3 for sealing.
  • the seal 104 prevents the epoxy from entering the receiving device 5, such as through the second through hole 32, into the receiving device 5; on the other hand, it prevents the interference light from entering the housing 1 or entering the receiving device 5 .
  • the sealing member 104 is made of silicone rubber, and may of course be made of other sealing materials.
  • the infrared light emitted from the emitting device 4 is incident on the emitting lens 21 through the first through hole 31 due to the first and second through holes 31, 32 formed in the circuit board 3.
  • the emitting lens 21 focuses the infrared emitting light to the target area, and when a human body or moving object enters the target area, the infrared light is reflected.
  • the receiving lens 22 receives the reflected infrared light, and after focusing, the received reflected light is irradiated onto the receiving device 5 through the second through hole 32.
  • the receiving device 5 measures the distance of the target according to the triangulation principle of the PSD, and finally controls the sanitary equipment.
  • the transmitting device 4 and the receiving device 5 can be mounted on the lower side of the circuit board 3 (i.e., the side of the circuit board 3 facing the lens 2 is the upper side, and the other side of the circuit board 3 is the lower side). Since the focal length required for the lens 2 of the distance detecting sensing device 100 of the present invention is constant, such an arrangement can make full use of the thickness of the circuit board 3 as a part of the focal length.
  • the positioning brackets 7, 8 are secured to the housing 1 to ensure the relative position of the transmitting device 4 and the receiving device 5 to the housing 1. Mounting the transmitting device 4 and the receiving device 5 to After the corresponding receiving portions of the brackets 7, 8 are positioned, the welding is fixed, and the positional accuracy is ensured to be unaffected by the installation, thereby effectively preventing the transmitting device 4 and the receiving device 5 from being soldered on the circuit board 3, because of the installation process, etc.
  • the problem is that the installation accuracy is insufficient, and the distance detecting sensing device 100 is not satisfactory, and even has the disadvantage of failure.
  • the distance detecting and sensing device 100 of the present invention has a low production cost and is advantageous for popularized applications.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Optical Distance (AREA)

Description

距离检测感应装置
【技术领域】 本发明有关一种红外感应装置, 尤其是指应用于自动感应水龙头、 自动冲水小便斗 等卫浴自动化领域内的距离检测感应装置 (PSD, Position Sensitive Detector )。 【背景技术】 红外感应器已经广泛应用于自动水龙头、 自动冲水小便斗、 抽水马桶冲洗设备、 喷 射热水的马桶坐圈、 手干燥器和装有热风风扇的抽水马桶等卫生设备中。 传统的红外感应器大部分采用主动式红外感应方式, 即红外发射器发射一定波长的 红外线, 经人体反射后, 通过红外接收器接收后, 判断该反射信号强度, 来实现自动感 应判断。 然而, 一些对红外线反射率低的物质 (如黑色衣服、 头发等), 就很难实现自动 感应判断。 红外发射器的红外光经过该些物质反射后, 只有极少数的红外光线被红外接 收器接收。 由于反射信号的强度不够, 而导致感应器无法判断是否有目标物存在, 因而 导致感应失灵。 为了解决上述传统红外感应洁具感应失灵的问题, 将距离检测感应装置 (PSD ) 引 入卫浴自动化领域内。 如图 9所示, PSD传感器是一种对入射光位置敏感的光电器件。 即当入射光照在器件感光面的不同位置时, PSD将输出不同的电信号。 PSD传感器是利 用三角测量原理, 能够精确测量距离的特点来实现的自动感应判断。 如图 9所示, 光源 发出的光经透镜 L1聚焦后投向待测体的表面。 反射光由透镜 L2聚焦到一维 PSD上, 形 成一个光点。 若透镜 L1与 L2间的中心距离为 b, 透镜 L2到 PSD表面之间的距离 (即 透镜 L2的焦距) 为 f, 聚焦在 PSD表面的光点距离透镜 L2中心的距离为 x, 则根据相 似三角形 PAB和 BCD的性质,可得出待测距离 DIS为: DIS = bf/x。因此,只要测出 PSD 的光点位置坐标 X的值, 即可测出待测体的距离。 当检测到待测体的距离位于预先设定的范围内时, 距离检测感应装置控制卫生洁具 的进行出水、 冲水等工作状态。 由于距离检测感应装置判断目标物与距离检测感应装置 的距离来实现自动感应的目的, 而不是判断发射信号的强度, 从而可有效解决传统红外 感应所存在"因反射信号的强度不够而导致感应失灵"的缺陷。 然而, 利用该距离检测感应装置, 容易受红外发射光线光暈的影响, 从而产生影响 检测精度等问题。
【发明内容】 本发明的目的在于提供一种具有较高检测精度的距离检测感应装置。 本发明的目的是通过如下技术方案实现的: 一种距离检测感应装置, 包括: 壳体、 聚焦用透镜、 安装有若干电子元器件的电路板以及发射红外光线的发射装置和接收感应 红外反射光线的接收装置。 其中壳体包括主体部以及位于主体部顶面上的两圆形开孔。 透镜包括设置于壳体开孔位置处的发射透镜和接收透镜。 电路板安装于壳体主体部内, 设有若干电子元器件, 对信号进行处理; 发射装置为红外发光二极管, 安装在电路板上, 发射红外光线到发射透镜。 接收装置为距离检测感应模块, 安装在电路板上, 感应从接 收透镜聚焦下来的反射光线。 距离检测感应装置还包括一安装在发射透镜与发射装置之 间的发射光线导引装置, 其包括位于发射透镜位置处的大圆孔以及位于发射装置的发射 管芯位置处的小圆孔, 其中所述小圆孔与大圆孔形成一锥形的红外光发射通道。 进一步地, 小圆孔比发射管芯的发光面小。 进一步地, 发射光线导引装置还包括收容发射装置的收容部, 该收容部与小圆孔贯 通。 进一步地, 距离检测感应装置还包括显示工作状态或异常情况的指示灯, 该指示灯 安装在电路板上并位于发射装置附近。 进一步地, 所述发射光线导引装置对应设置一指示灯显示孔。 进一步地, 距离检测感应装置还包括一安装于接收透镜与接收装置之间的密封件。 进一步地, 距离检测感应装置还包括一通过螺钉固定在壳体上的排线整理装置。 进一步地, 距离检测感应装置还包括遮蔽罩, 安装于发射装置与接收装置的周围, 防止电磁干扰。 进一步地, 遮蔽罩分为相互焊接的第一、 第二遮蔽罩, 其中第一遮蔽罩通过螺钉与 壳体固定并与电路板接触而实现接地, 而第二遮蔽罩通过卡扣结构与壳体固定的, 所述 发射和接收装置被安装于遮蔽罩与电路板之间。 进一步地, 透镜与壳体通过注塑成型的方式安装在一起。 进一步地, 壳体为导电材料制成。 与现有技术相比, 本发明距离检测感应装置具有较高的检测精度, 提高整机感应性 能。 【附图说明】 图 la是本发明距离检测感应装置的立体视图。 图 lb是本发明距离检测感应装置另一角度立体视图。 图 2是本发明距离检测感应装置的分解示意图。 图 3是本发明距离检测感应装置另一角度的分解示意图。 图 4a是本发明距离检测感应装置部分立体组装图。 图 4b是图 4a另一角度视图。 图 4c是 4b所示结构的分解示意图。 图 5是本发明距离检测感应装置的壳体视图。 图 6是本发明距离检测感应装置的发射定位支架视图。 图 7a是本发明距离检测感应装置的接收装置及其定位支架分解视图。 图 7b是图 7a另一角度视图。 图 8是图 la沿 A-A线的剖面视图。 图 9是现有技术距离检测感应装置工作原理图。 【具体实施方式】 下面参照附图具体介绍本发明的各种实施例, 图中相同的结构或功能用相同的数字 标出。 应该指出的是, 附图的目的只是便于对本发明具体实施例的说明, 不是一种多余 的叙述或是对本发明范围的限制, 此外, 附图没有必要按比例画出。 如图 1至图 7所示, 本发明距离检测感应装置 100, 主要安装于各类自动化的卫浴 设备中, 如感应小便斗、 感应便器以及感应水龙头等。 本发明距离检测感应装置 100主要包括: 壳体 1、 聚焦用透镜 2、 设置有若干电子元 器件的电路板 3、 发射红外光线的发射装置 4、 接收反射光线并感应的接收装置 5以及起 到电磁屏蔽功能的遮蔽罩 6。 其中, 发射装置 4与接收装置 5安装于电路板 3 同一侧上。 在本发明所示的实施方 式中, 发射装置 4与接收装置 5通过焊脚焊接到电路板 3上。 透镜 2固定在壳体 1上, 包括将红外发射光线聚焦发射出去的发射透镜 21和将反射光线聚焦照射到接收装置 5的 接收透镜 22。 由于距离检测感应装置 100对发射装置 4和接收装置 5之间的位置以及发射装置 4 与接收装置 5与透镜 2的位置需要具备一定的精度, 因此, 进一步, 本发明距离检测感 应装置 100还包括固定发射装置 4的定位支架 7、 固定接收装置 5的定位支架 8。 所述发 射和接收定位支架 7、 8收容发射装置 4与接收装置 5, 并通过与壳体 1配合定位, 从而 保证发射装置 4与接收装置 5的位置精度。 另外, 遮蔽罩 6遮蔽在安装有发射装置 4和接收装置 5的那一侧电路板外围, 以防 止周围环境对发射装置 4和接收装置 5的电磁干扰 (EMI)。 其中, 壳体 1包括纵长型的主体部 10以及设于主体部 10顶面的第一、 第二圆形开 孔 11、 12。 所述透镜 2、 设置有若干电子元器件的电路板 3、 发射装置 4、 接收装置 5及 遮蔽罩 6都位于壳体 1主体部 10内。 对应的, 透镜 2的发射透镜 21与接收透镜 22分别 安装于所述第一、 第二圆形开孔 11、 12内。 所述壳体 1 由绝缘材料 (如普通塑料等) 制 成, 诚然在本发明另一优选的实施方式中, 壳体 1 可以是导电材料 (如金属或导电塑料 等) 制成, 以达到理想的防电磁干扰效果。 在本发明优选的实施方式中, 透镜 2的发射透镜 21 以及接收透镜 22通过注塑成型 安装于壳体 1的第一、 第二圆形开孔 11、 12内。 具体来讲, 透镜 2与壳体 1的安装方式 为两次注塑而成, 即先将透镜 2注塑成型, 而后将注塑成型后的透镜 2放入壳体 1的模 具中与壳体 1一体注塑而成。 采用注塑成型的方式, 不但解决了透镜 2与外壳 1之间的 密封问题, 而且还可保证透镜 2中心与外壳 1上的相对位置精确。 其中, 所述发射与接 收透镜 21、 22的下部做成两个圆柱形, 以利于在与壳体 1注塑成型的过程中保证定位精 度。特别的, 发射透镜 21 以及接收透镜 22之间通过连接部 23连接。 以往的设计过程中, 发射透镜 21与接收透镜 22是单独设置的, 但是发射透镜 21与接收透镜 22之间, 透镜 2与发射装置 4、 接收装置 5之间存在一定的精度要求, 单独设置的设计不容易精确控制 位置, 显然较难满足精度的要求。 因此, 通过将发射透镜 21与接收透镜 22通过一连接 部 23连接, 作为一个整体安装, 可保证定位精度。 更进一步的, 该连接部 23还具有至 少一弯折部, 可防止发射光线直接沿着连接部 23从发射透镜 21传导到接收透镜 22, 发 生不必要的内部光反射和折射的现象, 从而影响 PSD的检测精度。 在图 2和图 3所示的 实施方式中, 该连接部为经过多次弯折而成, 大致呈 Z形。 从成本与效果综合考虑, 这 样设计, 光线从发射透镜 21 要到达接收透镜 22, 需要经过两次反射, 光路更加复杂, 从而可以更加有效的防止发射光线直接从发射透镜 21 进入接收透镜 22。 诚然, 该弯折 部也可根据实际应用情况增加或减少。 在本发明另一实施方式中, 所述透镜 2 与壳体 1 之间也可采用装配组装的安装方式。 其中, 电路板 3集成有若干电子元器件, 正对发射透镜 21 以及接收透镜 22设有第 一通孔 31与第二通孔 32。 其中第一通孔 31容许发射定位支架 7穿过。 电路板 3对信号 进行处理, 并将处理后的数据传输给主控制器, 从而进一步控制卫浴设备 (未图示)。 其中, 发射装置 4为红外发光二极管 (IR LED), 安装于电路板 3上, 且位于电路板 3的下侧面 (如图 2、 3所示, 电路板 3面向透镜 2的一面为上侧面, 另一面则为电路板 3的下侧面)。 发射装置 4的一边还设有用以起指示作用的指示灯 41, 为反应距离检测感 应装置 100工作状态或如电池电量不足等异常情况的指示窗口。 其中, 接收装置 5为距离检测感应模块(PSD Sensing Module), 安装于电路板 3上, 且也位于电路板 3的下侧面。 其中, 遮蔽罩 6通过螺钉 101、 102安装在壳体 1底部, 将发射装置 4、 接收装置 5 遮蔽起来, 包括第一遮蔽罩 61与第二遮蔽罩 62。 其中第一遮蔽罩 61先与壳体 1固定并 通过螺钉 101、 102与电路板 3的接地线略接触而实现接地。 而第二遮蔽罩 62则通过卡 扣的形式固定在壳体 1上, 而与第一遮蔽罩 61焊接接触并实现接地。 这样设置, 可以防 止单独设置一整块遮蔽罩而不利于安装固定。 其中, 发射定位支架 7与壳体 1安装, 包括位于支架顶端且与发射透镜 21配合的大 圆孔 71以及位于支架底端用以收容发射装置 4的收容部 72。 该大圆孔 71的直径与发射 透镜 21 的发射面大致相当。 所述发射定位支架 7两侧还延伸设有支撑柱 73, 以将定位 支架 7抵接在电路板 3上, 使得电路板 3给予定位支架 7足够的支撑力, 防止定位支架 7在安装过程中掉出壳体 1 等问题的发生。 特别的, 发射定位支架 7还包括位于支架两 侧的方形凸台 74, 该方形凸台 74与壳体 1 内部顶面上的定位槽 13配合, 以将发射定位 支架 7与壳体 1定位。 诚然, 该方形凸台 74也可以是安装在发射定位支架 7其他位置上 的其他形状, 如圆柱形凸台。 所述发射定位支架 7的收容部 72从电路板 3的上方穿过电 路板 3的第一通孔 3 1, 在电路板 3的下侧面将发射装置 4收容定位。 所述发射装置 4的 焊接脚通过收容部 72两侧的缺口 (未标号)伸出弯折后与电路板 3焊接连接。 该发射定 位支架 7为绝缘材料制成, 当然也可以是导电材料制成。 当其用导电材料制成时, 可以 作为防电磁干扰的遮蔽体。 如图 6所示, 发射定位支架 7还包括靠近发射装置 4收容部 72的小圆孔 75以及指 示灯 41 的指示灯显示孔 76。 如图 8所示, 发射小圆孔 75和大圆孔 71形成锥形红外光 发射通道, 这样设置可使得光线从发射装置 4 的管芯通过小圆孔 75 射出、 通过大圆孔 71后经过发射透镜 21聚焦后射出。 从而可以保证发射光线不会射到壳体 1 内的其他区 域, 影响效率以及产生光干扰, 更不会通过内部光的反射及折射到接收装置 5上而影响 检测效果。 同时, 由于发射装置的管芯较大导致发出的光有很大的光暈。 这对于要求精 确信号的接收装置来说是非常不利的一个因素, 会影响检测感应的结果。 在本实施方式 中, 收容在收容部 72内的发射装置管芯发出的红外光线, 只通过小圆孔 75 向外发射。 小圆孔 75比发射装置的发光面小, 不需要的部分被挡住。 这样设置, 同样可有效减少光 暈对检测信号的影响, 可以使检测精度更高。 此时的发射定位支架 7充当发射光线导引 装置。 结合如图 7a、 图 7b所示, 接收定位支架 8包括安装到壳体上的横梁 81以及与横梁 81连接在一起收容接收装置 5的收容部 82。收容部 82有容纳接收装置 5的收容空间 821。 且收容部 82的顶面设有长方形开口 820与电路板第二通孔 32对齐, 以利于接收光线进 入接收装置 5的接收面上。 收容部 82为横梁 81 的中部水平延伸而成, 可以让接收装置 5的焊接脚很方便的从收容部 82的两侧的缺口 (未标号) 伸出并利于焊接。 同时, 横梁 81的两自由端与壳体 1主体部 10两侧壁上的定位凹槽 14卡持配合, 以起到有效定位的 目的。 本发明距离检测感应装置 100还包括一排线整理装置 9, 该装置 9可将电路板 3上 的线 (未图示) 有效整理并通过螺钉 103被固定在壳体 1内。 本发明距离检测感应装置 100还包括位于透镜 2与电路板 3之间, 起密封作用的密 封件 104。 该密封件 104—方面可防止环氧进入接收装置 5内, 如通过第二通孔 32进入 到接收装置 5 内; 另一方面也可防止干扰光线进入到壳体 1或进入到接收装置 5 内。 在 本实施方式中, 该密封件 104为硅橡胶制成, 当然也可以是其他密封材料制成。 诚然, 在条件允许的情况下, 发射透镜 21与发射装置 4之间也可设置类似的密封件结构。 结合图 8所示, 由于电路板 3上开设的第一、 第二通孔 31、 32, 发射装置 4的红外 发射光线通过第一通孔 31射向发射透镜 21。发射透镜 21聚焦红外发射光线到目标区域, 当有人体或移动目标物进入该目标区域内时, 红外光线被反射。 而接收透镜 22则接收该 反射红外光线, 并聚焦后将接收到的反射光线通过第二通孔 32照射到接收装置 5上。 而 接收装置 5则根据 PSD的三角测量原理, 测算出目标物的距离, 最终控制卫浴设备。 这 样设置, 使得发射装置 4和接收装置 5可以安装在电路板 3的下侧面 (即电路板 3 向着 透镜 2的一面为上侧面, 而电路板 3另外一面为下侧面)。 由于本发明距离检测感应装置 100透镜 2需要的焦距一定, 因此这样设置可以充分利用电路板 3 的厚度来作为焦距的 一部分。 同时, 由于电路板 3上需要设置其他电子元器件, 将发射装置 4与接收装置 5 安装在电子元器件之间, 能充分利用壳体 1 内部以及电路板 3上、 下两侧面的空间。 综 上所述, 这样设置可以降低整个距离检测感应装置 100的高度、 减小体积。 另外, 发射装置 4和接收装置 5安装后位于电路板 3 (也可起到屏蔽效果) 与遮蔽 罩 6之间, 可以有效屏蔽外部的干扰。 本发明距离检测感应装置 100的发射装置 4和接收装置 5通过定位支架 7、 8固定, 确保发射装置 4和接收装置 5的位置精度。 该定位支架 7、 8通过与壳体 1配合固定而可 保证发射装置 4和接收装置 5与壳体 1的相对位置。 将发射装置 4和接收装置 5安装至 定位支架 7、 8相应的收容部后再进行焊接固定, 而可保证其位置精度不受安装的影响, 从而可以有效防止将发射装置 4和接收装置 5焊接在电路板 3上, 因为安装工艺等问题 而导致安装精度不够, 距离检测感应装置 100效果不理想, 甚至失效的缺点。 另外, 本发明距离检测感应装置 100生产成本较低, 利于普及应用。 虽然上面已经揭示了本发明的具体实施方式, 但是它们不是本发明范围的局限, 熟 知本技术领域的人员对以上所述具体实施的修改和变化也包含在本发明的范围之内。

Claims

权 利 要 求 书
1. 一种距离检测感应装置, 包括: 壳体、 聚焦用透镜、 安装有若干电子元器件的电 路板以及发射红外光线的发射装置和接收感应红外反射光线的接收装置, 其中壳体包括 主体部以及位于主体部顶面上的两圆形开孔; 透镜包括设置于壳体开孔位置处的发射透 镜和接收透镜; 电路板安装于壳体主体部内, 设有若干电子元器件, 对信号进行处理; 发射装置为红外发光二极管, 安装在电路板上, 发射红外光线到发射透镜; 接收装置为 距离检测感应模块, 安装在电路板上, 感应从接收透镜聚焦下来的反射光线; 其特征在 于: 距离检测感应装置还包括一安装在发射透镜与发射装置之间的发射光线导引装置, 包括位于发射透镜位置处的大圆孔以及位于发射装置的发射管芯位置处的小圆孔, 其中 所述小圆孔与大圆孔形成一锥形的红外光发射通道。
2. 如权利要求 1所述的距离检测感应装置, 其特征在于: 小圆孔比发射管芯的发光 面小。
3. 如权利要求 1或 2所述的距离检测感应装置, 其特征在于: 发射光线导引装置还 包括收容发射装置的收容部, 该收容部与小圆孔贯通。
4. 如权利要求 1或 2所述的距离检测感应装置, 其特征在于: 距离检测感应装置 还包括显示工作状态或异常情况的指示灯, 该指示灯安装在电路板上并位于发射装置附 近。
5. 如权利要求 4所述的距离检测感应装置, 其特征在于: 所述发射光线导引装置对 应设置一指示灯显示孔。
6. 如权利要求 1或 2所述的距离检测感应装置, 其特征在于: 距离检测感应装置还 包括一安装于接收透镜与接收装置之间的密封件。
7. 如权利要求 1或 2所述的距离检测感应装置, 其特征在于: 距离检测感应装置 还包括一通过螺钉固定在壳体上的排线整理装置。
8. 如权利要求 1或 2所述的距离检测感应装置, 其特征在于: 距离检测感应装置还 包括遮蔽罩, 安装于发射装置与接收装置的周围, 防止电磁干扰。
9. 如权利要求 8所述的距离检测感应装置, 其特征在于: 遮蔽罩分为相互焊接的第 一、 第二遮蔽罩, 其中第一遮蔽罩通过螺钉与壳体固定并与电路板接触而实现接地, 而 第二遮蔽罩通过卡扣结构与壳体固定的, 所述发射和接收装置被安装于遮蔽罩与电路板 之间。
10. 如权利要求 1 或 2所述的距离检测感应装置, 其特征在于: 透镜与壳体通过注 塑成型的方式安装在一起。
11. 如权利要求 1或 2所述的距离检测感应装置,其特征在于:壳体为导电材料制成。
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