开关控制.人员传感器.技术

**以下译文来自122-21 颜泽欣**

COURSE DESCRIPTION
课程描述

Occupancy sensors are switching devices that detect when a space is unoccupied and automatically turn OFF (or dim) the lights after a short period of time to save energy. The device may also turn the lights ON automatically upon detecting the presence of people, providing convenience and a potential security aid.
占空传感器是种交换设备，用来检测当一个空间没人住时自动关闭（或调暗）灯后的短时间内起到节省能源。该装置还可以检测人存在时自动接通灯，提供了方便和潜在的安全援助。
Due to their relative simplicity and high energy savings potential, occupancy sensors have become a standard feature in new construction, and are increasingly mandated by commercial building energy codes.
由于其相对简单和高节能潜力，占空传感器已成为新的功能建设的标准，并越来越多的商业建筑物授权了能源代码。
Occupancy Sensors: Technology provides knowledge about occupancy sensor technology, including typical energy savings, detection method, coverage area and patterns, mounting packages and special features. By the end of the course, participants will be able to work with occupancy sensor technology in lighting control system designs.
占空传感器：技术支持下的信息占用的传感器技术，包括典型的节能，检测方法，覆盖范围和模式，安装包和特殊功能。在课程结束后，学员将能够使用占空传感器技术在工作和照明控制系统的设计中。

LEARNING OBJECTIVES
学习目标
At the end of the course, participants will be able to:
在课程结束后，学员将能够：
• understand how occupancy sensing works as an energy code-compliant automatic lighting shutoff strategy and typical energy savings in various applications based on industry estimates.
• 了解占空传感器工作时的能源符合规定和照明自动关闭的方法和典型的能源节约以及基于行业规定的各种应用。
• select operating modes (auto-ON to 100%, auto-ON to 50%, manual ON), detection method (PIR, ultrasonic, dual-technology), coverage area and pattern, mounting packages (ceiling, high wall/corner, wall switch, luminaire mounting, workstation), and special features.
• 选择操作模式（自动开至100％时，自动开至50％，人工开启），检测方法（PIR，超声波，双技术），覆盖范围和模式，安装包（天花板，墙高/角落，墙壁开关，灯具安装，工作站），以及特殊功能。
• understand the value of light loggers as a tool for gathering information about occupancy patterns and thereby more accurately estimate energy savings from occupancy sensors.
• 了解光记录器作为一种工具的价值是收集有关占用模式的信息，从而用感应器更准确地估计节约能源。
• work with occupancy sensor technology in lighting control system designs.
• 在照明控制系统设计中使用占空传感器技术。
ENERGY SAVINGS
节约能源
The amount of energy cost savings an occupancy sensor can produce is variable, dependent
on a numberof factors such as occupancy patterns and sensor settings, but research suggests

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significant savings in manycommon commercial applications.

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占空传感器节省能源费用的量是可变的，依赖于许多因素，如占空模式和传感器的设置，但是
研究表明许多常见的商业应用中都显著节省了能源。
Space Type Lighting Energy Savings Demonstrated in Research or Estimated as Potential Study Reference
Private Office 38% An Analysis of the Energy and Cost Savings Potential of Occupancy Sensors for Commercial Lighting Systems, Lighting Research Center/EPA, August 2000.
Classroom 55%
Restroom 60%
Conference room 50%
Break room 29%
Open Office 15% Lighting Controls: Patterns for Design, R. A. Rundquist Associates, Electric Power Research Institute, 1996.
Open Office (individual fixture control) 35% Canada National Research Council study on integrated lighting controls in open office, 2007.

空间类型 经过论证或研究估计的潜在的照明节能值 研究参考
私人办公室 38%
分析占空传感器的能源和成本节约潜力的商业照明系统，照明研究中心/ EPA，2000年8月。
课堂 55%
卫生间 60%
会议室 50%
休息室 29%
开放式办公 15% 照明控制：模式设计，RA Rundquist Associates公司，电力科学研究院，1996年。
开放式办公
（个别灯具控制） 35% 加拿大国家研究理事会的综合性照明控制研究办公所，2007年。

OPERATING MODE
操作模式
Traditional occupancy sensors turn the lights on upon detecting the presence of people in the space. However, research has found that this approach saves less energy than requiring users to turn the lights on manually.
传统的感应器在检测空间有人时开启灯。然而，研究发现，这种方法节省的能量小于用户手动的打开灯。
The latest generation of energy codes is beginning to favor these so-called manual-on occupancy sensors, also called vacancy sensors. Another option is to configure the lights for bilevel switching and turn the lights on to 50%; the user must flip a switch to achieve 100%.
最新一代的能源规则开始青睐这些所谓的手动式感应器，也叫空置传感器。另一种选择是装配灯的双相交换并且灯的转化达到50%;用户必须翻转开关以达到100％。

OPERATING MODE CLTC
操作模式CLTC
In one California Lighting Technology Center study involving occupants in perimeter private offices, four operating modes were evaluated: auto-ON to 100% (baseline), auto-ON to 100% with bilevel switching, auto-ON to 50% with bilevel switching, and manual-ON with bilevel switching. 一个加州照明技术中心的研究所研究了周边私人的办公室，对四种工作模式进行了评价：自动开至100％（基线），自动开至100％的双极切换，自动开至50％的双极交换，手动开启的双双极交换。
The auto-ON to 100% bilevel switching scenario saved an additional 34% energy compared to the baseline. The auto-on to 50% bilevel sensor saved 52%, and the manual-on bilevel sensor saved 46%.
自动开到100％的双极换方案节省了额外的34％的能源比基础的。自动开至50％的双极传感器节约52％，并且手动开至双极传感器保节约46％。
While manual-ON saves more energy than auto-ON to 100%, note that it may be perceived as less convenient than auto-ON modes, since it requires the occupant to use a switch every time they enter the space. 虽然手动开启节省更多的能量比自动开到100％，请注意，它比自动开启的不方便，因为它需要人们进入的空间时，每次都要使用一下开关。
DIGITAL OCCUPANCY SENSORS
数字占用传感器
The latest generation of occupancy sensor controls feature digital construction enabling a number of benefits, including onboard intelligence, self commissioning, feedback (report on usage) and easier connections than allowed by traditional wiring methods.
最新一代的占空传感器在控制功能上采用了数字化结构，实现了许多性能，包括板块智能化，自动调试，反馈（使用情况报告），通过对比比传统的接线方法更容易。
In the digital control system shown to the right, all devices are connected using RJ45 low-voltage cables and plugged into the two-relay central controller, which senses the attached devices and automatically configures for optimal energy-saving operation.
如右图所示的数字控制系统，所有设备均采用RJ45低压电缆连接，并插入到双蓄电池中央控制器中，它通过检测连接的设备，自动配置到最佳的节能运行状态。

SENSING TECHNOLOGY
传感技术
Occupancy sensors detect the absence of people using one or a combination of several methods. The most common single-technology methods are passive infrared (PIR) and ultrasonic. Dual-technology sensors combine PIR with ultrasonic or acoustic sensing.
占空传感器检测的情况下人们使用一种或几种组合的方法。最常见的单技术方法是被动红外（PIR）和超声波。双传感器技术相结合PIR超声波或声检测。
PIR
被动红外
Ultrasonic
超声波
Dual Technology
双传感器技术
PASSIVE INFRARED
被动红外
PIR occupancy sensors react to the movement of heat emitted by people in motion. These sensors detect motion within a field of view that requires a line of sight; they cannot "see" through obstacles. The sensor may detect motion through glass in some cases depending on the glass's infrared transmission characteristics.
PIR感应器是用来响应人在运动中产生的热。这些传感器检测时需要图像在视线上的运动；他们无法通过障碍“看到”。 该传感器检测运动可通过玻璃在某些情况下变化，玻璃的红外线透射特性决定了他。

PASSIVE INFRARED
被动红外
The sensor's multi-faceted lens defines its coverage area as a series of discrete fan-shaped zones. As an occupant crosses these zones, motion is detected. As a result, PIR sensors are more sensitive to motion occurring lateral to the sensor. The sensor's lens also determines the size of motion it is best suited to detect.
传感器的多面透镜的覆盖区域可以看为一系列离散的扇形区域，当人们穿过这些区域，会被检测出运动，结果表示，被动红外传感器对运动的横向传感更敏感。传感器的透镜还确定被检测的运动大小。
The gaps between the coverage zones widen with distance, which results in decreasing sensitivity to motion proportional to distance from the sensor. Most PIR sensors are sensitive to full body movement up to about 40 ft. but are sensitive to hand movement, which is more discrete, up to about 15 ft.
拉大覆盖区域之间的距离差距，这导致传感器到距离的灵敏度运动成比例降低。大多数红外传感器对全身运动敏感至多约40英尺。但是手部的运动，是更离散的，敏感高达约15英尺。

ULTRASONIC
超声波
Ultrasonic occupancy sensors emit an ultrasonic high-frequency signal throughout a space, monitor the frequency of the reflected signal, and interpret change in frequency as motion. Alternately, they can set up a standing wave and look for changes in both amplitude and frequency due to motion. The frequency of the waves is typically well above (32-40 kHz) what the normal ear can detect (20 kHz) to avoid incompatibilities with devices such as hearing aids. These sensors do not require a direct line of sight (coverage is volumetric), making them ideal for applications such as multiple public restroom stalls.
超声波感应器会在整个空间发射出高频超声波信号，监测反射信号的频率，并且体现运动变化的频率，或者，他们可以建立一个驻波，由于运动而变化幅度和频率。波的频率通常远高于（32-40千赫），正常的耳朵可以检测（20千赫），以避免不兼容，如助听器设备。这些传感器不需要直接视线（覆盖区域），它们非常适用于诸如多个休息室中。

These sensors are highly sensitive, able to detect hand motion at a distance up to 25 ft. Shown here is a typical sensitivity pattern for a wall-mounted ultrasonic sensor. The sensor is most sensitive to motion occurring to and from the sensor.
这些传感器是高度灵敏的, 能够检测手的运动的距离可达25英尺. 这里展示的是用于壁挂式超声波传感器的典型灵敏度模式。该传感器对运动的发生十分敏感。
DUAL TECHNOLOGY
双技术
Dual-technology sensors utilize two detection methods to increase reliability in applications where a higher degree of detection is desirable, such as classrooms and conference rooms.
双技术传感器利用两种检测方法，在检测中有较高的可靠性，就像教室或者会议室中。

Most manufacturers offer sensors that combine ultrasonic and PIR technologies. The lights are turned ON only when both technologies detect the presence of people, eliminating the possibility of false-ON triggering. Similarly, only one technology is needed to hold the lights ON, significantly reducing the possibility of false-OFF switching
大多数厂商提供的传感器，结合超声波和红外技术。把灯打开时，只有当人进行两种技术检测时，才能消除虚假点亮触发的可能性。同样，只有一项技术需要保持灯的打开时，能显著减少假-OFF切换的可能性。

ACOUSTIC DETECTION
声学探测
Another type of dual-technology sensor combines PIR technology with acoustic detection, enabling the sensor to detect occupants via their motion or the noises they make. This method is effective in applications where there are obstructions and/or occupants that are not moving for long periods of time. The lights are only turned ON when the PIR technology detects initial motion, thus preventing false-ON switching. The lights are then turned OFF only when there is no detected occupant motion or occupant sound, thereby preventing false-OFF switching. The device's microphone is tuned to listen only for sounds caused by occupants, and distinguishes sharp variations from white noise. It is also known as passive dual-technology because no sound waves are emitted into the space. The primary manufacturer is Sensor Switch.
另一种类型的双传感器技术结合了被动红外技术和声学检测，使传感器通过运动，或者噪音检测居住者。当有障碍物或人们长时间未移动的情况下，这种方法是有效的。只有当PIR技术检测初步议案后灯才会被打开，从而防止虚假点亮转换。只有当没有检测到人们的运动或人们的声音时，灯才会被关闭，这样防止了虚假关闭的切换。该设备的麦克风被调整为只能被居住者的听到的声音，去并区别于急剧变化的白噪声。它也被称为被动双技术，因为没有声波发射到空间中。主要的厂家是Sensor Switch（感应开关）。

The coverage pattern/range for a PIR/acoustic sensor will always be the same as its PIR only counterpart. This is because lights will only turn ON through PIR. The acoustic dual technology provides overlapping detection of the PIR coverage area, but will not trigger lights initially ON. Additionally, because the sensor is not transmitting sound, the effective distance from occupants varies with the magnitude of the sound generated by the occupant and the acoustics of the space. Spaces with hard floors or very quiet rooms with little or no background noise will be more sensitive to small sounds. Additionally, advanced filtering is utilized to prevent noises from outside the PIR coverage area from keeping the lights ON indefinitely.
相同PIR /音响传感器的PIR覆盖图案/范围始终是一样的。这是因为灯光只会在PIR下打开。声双技术提供探测重叠的PIR覆盖区域，但不会触发灯的打开。此外，由于传感器不传送声音，距离居住者的有效距离随着居住者产生的声音大小和空间背景声音的大小改变。有硬板的空间或很安静的房间或没有背景噪音房间将对小声音更加敏感。此外，先进的过滤是用来防止噪音从PIR覆盖区域外噪音的进入用来保持灯亮下去。

**以下译文来自122-05-余方男**

POWER: LOW VOLTAGE
Occupancy sensors may be low- or line-voltage or wireless. Most sensors are low-voltage devices. They employ a separately installed power pack (also called a switch pack) to convert incoming AC voltage to DC voltage, and provide power switching via a relay. This allows the sensor to be located anywhere in the ceiling and easily repositioned without disturbing the power line. The power pack may be rated for one or more specific voltages or offered as a universal-voltage unit (example shownto the right).
The switching capacity of the relay should be rated at 20A to ensure a complete lighting circuit can be controlled if needed. The power pack may feature one or two relays for single-load or bilevel switching. Auxiliary units are available that feature a relay but no transformer, typically used in parallel with a single-relay power pack for switching non-lighting loads such as bathroom fans.
能源：低电压
占空传感器可以是低电压或是线电压或是无线电压。大多数是低压器件，它们采用一个单独安装电源组（也称为开关包）使输入的交流电压变为直流电压，并且经过继电器为开关提供能源。这就能够使传感器放在天花板的任何地方并且能够不影响电路的重新复位。电源包可以为一个或多个额定电源提供能够通用的电压单元。如果需要确保控制电路完全点亮，继电器的开关应设为额定20A的电流。动力包可以配备一或两个继电器来支持单负载或二负载的转换。而辅助单元可配备继电器不过没有变压器，一般可以通过单继电器的动力包用于并联的非照明负载的切换。就像浴室的排气扇。

POWER: LINE VOLTAGE
Some occupancy sensors are available as line-voltage units. These sensors do not use a separate power-pack; all components are integrated into a single unit suitable for applications where there is no plenum or junction boxes are difficult to access. Note that line-voltage ceiling sensors may only have the ability to switch about one-third the load of a ceiling sensor that uses a power pack. They can serve as a convenient alternative to low-voltage systems, especially for individual fixture control in applications such as warehouses and other small loads.
能源：线电压
有些感应器可用于线电压的单元。这些传感器不会作为单独的电源包而用。所有的器件都集成在一个适合应用的单个单元里。这个单元没有中，没有多余的物质，据接线盒也较远。需要注意的是线电压天花板传感器仅具有切换电源组天花板传感器大约三分之一负载的能力。它们可以方便的用于替代低压系统，特别适用于个人灯具的控制，如仓库等其他小负荷的控制。

POWER: WIRELESS
Wireless control devices communicate using a radio signal instead of wiring. They may be powered by batteries or through energy harvested from the operating environment, potentially reducing installation costs while increasing design and retrofit flexibility. High-quality batteries offer a rated life of 10 years. Self-powered devices are available using EnOcean's wireless radio-frequency technology and harvest energy from human activity, ambient light or temperature differences.
能源：无线
无线控制装置用无线电信号取代了有线信号。它们可通过电池获得能量或是从操作环境收获电能，从而潜在地减少安装成本，同时提高设计和改造的灵活性。高品质的电池可提供10年的额定寿命。自供电设备都可以使用EnOcean公司的无线射频技术和收获的能源来自人类活动，环境光或温度的差异。

COVERAGE AREA AND PATTERN
Manufacturers report coverage area and coverage pattern. Coverage area defines the boundaries within which the sensor can detect motion, with the coverage pattern being the resulting shape (circle, rectangle, ellipse, tear drop, etc.) that is graphically depicted in manufacturer literature. NEMA 7-2000 offers testing and reporting methods for coverage areas and patterns to ensure meaningful comparison between products. Shown here are coverage patterns for a wall switch ultrasonic sensor (top) and high- and low-bay occupancy sensors for 360and aisle coverage (bottom).
覆盖的区域或模式
厂商报告了覆盖面积和覆盖模式。覆盖区域限定在传感器可以检测到运动的边界内，在厂商文献图形描述中生成的覆盖图案的形状是圆形，矩形，椭圆形，泪滴等。NEMA7-2000提供测试方法，以及报告覆盖的范围和模式，以确保产品之间可以进行有意义的比较。这里展示的是墙壁开关的覆盖模式。
超声波传感器（顶部）和360度的高低型占空传感器和覆盖过道（底部）

MOUNTING PACKAGES: CEILING
Sensors may be configured for ceiling, high wall/corner, wall switch (wallbox ),workstation and luminaire mounting
Ceiling sensors are mounted on the ceiling in the same space as the controlled lights. The higher mounting is appropriate for control of large areas that feature obstacles such as partitions, in addition to narrow spaces such as corridors and warehouse aisles. Units can be networked for control of larger areas than can be controlled by a single sensor.
支撑部分：天花板
传感器安装配置在天花板，墙高/角落，墙壁开关（箱），工作站和灯具上。吊顶传感器可以作为对灯的控制安装在同一个空间。在较高的位置可以安装适合大面积工作区域的的控制器件，如分区隔板。（不包括狭小的空间，如走廊和过道仓库等）。相对应单个传感器控制来说本单元可以联网控制更大的区域。

MOUNTING PACKAGES: HIGH WALL/CORNER
These sensors are mounted high on a wall or corner of a space. As with ceiling sensors, it is appropriate for coverage of large areas that feature obstacles, but enables directional detection. For example, a ceiling sensor might detect motion in an adjacent hallway, and trigger the lights when it is not supposed to do so. An alternative is to mount the sensor on the wall over the door looking into the space.
支持部分：高墙拐角
这些传感器安装在高墙或转角上时。与天花板传感器一样，它可以覆盖大区域的功能障碍。且允许定向检测。例如，天花板传感器可能检测到运动并触发指示灯，但是运动的物体却在相邻的走廊里，那么它这样响应就是错误的。另一种方法是将传感器安装在门旁的墙壁上来寻找空间。

MOUNTING PACKAGES: WALL SWITCH (WALLBOX)
These relatively inexpensive and easy to install sensors are appropriate for smaller, enclosed spaces such as private offices with clear line of sight between sensor and task area. The field of view is typically 120-180°; some sensors can be masked to limit the field of view as needed. For maximum savings, select sensors that provide positive disconnect from the power when the lights are OFF to avoid residual power use (energy waste) during the OFF state.
支撑部分：墙壁开关（箱）
这些相对便宜且易于安装的传感器适用于较小的，封闭的空间，如传感器和任务区之间的具有清晰视线的私人办公室。视场通常为120-180°;如果需要限制视场一些传感器是可以被掩蔽的。为了最省电，选择传感器指示灯熄灭时自动断开电源。这样可以避免在关闭状态剩余电力的使用（能源的浪费）。

MOUNTING PACKAGES: LUMINAIRE MOUNTING
As with photosensors, some occupancy sensors are available that may be integrated into a luminaire (as a specifiable feature of the luminaire) for easier installation, greater design flexibility and an integrated appearance. Some occupancy sensors are designed to attach to luminaires, typically PIR sensors for medium- and high-bay applications.
支撑部分：灯具支架
和光敏传感器一样，一些占用传感器是可以集成到灯具中的（如照明设备的一个可指定功能），这样更易于安装，设计灵活性更高和会把所有集成在一起。一些感应器被设计为用来连接灯具，像PIR传感器中的中|高型的应用。

BILEVEL STAIRWELL LIGHTING
Another interesting application for luminaire-integrated occupancy sensors is stairwell lighting. Stairwells may be unoccupied for a significant part of operating hours, but must remain ON for safety and security reasons. Manufacturers are now offering bilevel luminaires with occupancy sensors that turn the lights ON full when the stairwell is occupied and gradually dims to a preset level when unoccupied.
二层的楼梯间照明
对于灯具集成感应器的另一个有趣的应用是楼梯间的照明。楼梯可能就是在工作时间最突出的不被使用或是闲置的一部分。但也同样必须保证安全。厂商现在提供双极灯具的传感器控制，使楼梯间没有被占用时也能达到预设的照明标准。

MOUNTING PACKAGES: WORKSTATION
This personal, portable sensor is appropriate for individual cubicles and workstations. The sensor is connected to a power strip for simultaneous control of lighting and plug loads such as computer monitors, task lights, radios and space heaters.
支撑部分：工作站
这个个人的，便携的传感器适合于个人隔间和工作站。传感器连接到电源板，可以用于同时控制照明和插头负载。如计算机监视器，工作灯，收音机和空间加热器。
OCCUPANCY SENSOR CHARACTERISTICS
Mounting Location Sensor Technology Angle of Coverage Typical Effective Range\* Optimum Mounting Height
Ceiling Ultrasonic 360º 500-2000 sq.ft. 8-12 ft.
Ceiling PIR 360º 300-1000 sq.ft. 8-30+ ft.
Ceiling Dual technology (PIR/ultrasonic) 360º 300-2000 sq.ft. 8-12 ft.
Wall switch Ultrasonic 180º 275-300 sq.ft. 40-48 in.
Wall Switch PIR 170-180º 300-1000 sq.ft. 40-48 in.
Corner wide view PIR and dual technology (PIR/ultrasonic) 110-120º To 40 ft. 8-15 ft.
Corner narrow view PIR 12º To 130 ft. 8-15 ft.
Corridor Ultrasonic 360º To 100 ft. 8-14 ft.
High mount PIR 12-120º To 100 ft. To 30 ft.
High mount corner Dual technology (PIR/ultrasonic) 110-120º 500-1000 ft. 8-12 ft.
High mount ceiling Dual technology (PIR/ultrasonic) 360º 500-1000 ft. 8-12 ft.
Luminaire-integrated PIR, ultrasonic 360º To 12 ft. 8-12 ft.
Luminaire-attached PIR 360º, aisle To 40 ft. 20-40 ft.

* Sensitivity to minor motion may be substantially less than noted above, depending on environmental factors.

Mounting Location:安装位置 Ceiling：天花板 Wall switch：墙壁开关
sensor Technology：传感器技术 Corner wide view：角落视野宽度 Corner narrow view：角落视野窄度
Angle of Coverage：覆盖角度 Corridor：走廊 High mount corner：高安装角
Typical Effective Range\*：一般有效的范围 High mount ceiling：高安装天花板 Luminaire-attached：灯具连接 Optimum Mounting Height：最佳安装高度 Luminaire-integrated：灯具集成
Sensitivity to minor motion may be substantially less than noted above, depending on environmental factors.：轻微的运动实质上要少于上面所写的，主要取决于环境因素。

SPECIAL FEATURES: ANNUNCIATORS AND WARNING SIGNALS

Most occupancy sensors communicate detection status using either an LED indicator light or audible signal. When the light is ON, motion is being detected.
For those sensors that use an audible alarm, the sensor will quietly emit sound shortly before turning OFF the li ghts
特殊功能：报警器和警告信号
当灯亮，移动，正在检测时。大多数感应器会使用一个LED指示灯或声音信号进行通信的状态检测。对于那些使用声音报警传感器，传感器会悄悄关掉灯前不久发出声音

SPECIAL FEATURES: MASKING
Depending on the manufacturer, a number of special features may be available for its products that can be used to optimize their application.
For example, PIR sensors may be available with masking labels, blinders or shutters that allow the coverage area to be fine-tuned to prevent false-ON triggering. For example, if a sensor's coverage monitors a private office but also an adjacent corridor, then the masking label can be used to obstruct the sensor's line of sight to the corridor.
Another way to accomplish this is via automatic sensitivity adjustment in the sensor. When the sensor signals the lights to turn OFF due to the absence of people, sensitivity will be automatically reduced. Once the lights are turned ON, the sensitivity increases back to its original setting.
特殊功能：屏蔽
根据厂商报告，一些特殊功能可使其产品进行优化应用。例如，PIR传感器可在眼罩或百叶窗提等覆盖的区域来进行微调，以防止假接通触发屏蔽标签。例如，如果一个传感器监视私人办公室，同时也覆盖相邻的走廊，掩蔽标签可用于阻挠视线传感器通往走廊的线路。另一种方式进行实现，是通过传感器自动灵敏度调节。当传感器信号的灯关掉，由于没有人，灵敏度会自动降低。一旦灯被接通时，灵敏度提高了回其原始设置.
SPECIAL FEATURES: BILEVEL SWITCHING
Bilevel switching is encouraged by most energy codes. Some power packs include two separate relays for controlling two circuits simultaneously or independently. This allows the sensor to integrate two manual switches for bilevel switching, which saves energy. For example, in a three-lamp light fixture, one switch could control the ballast powering the outboard lamps, and the other switch could control the ballast powering the inboard lamp, as shown in this example
特殊功能：二层开关
双层开关被大多数能源效益守则所支持。一些动力组件包括两个独立的继电器同时独立的控制两个回路。这使得传感器的两个手动开关集成为二层交换，从而节省了能源。例如，在一个三灯灯具，一个开关可以控制镇流器供电的舷外灯，另一个开关能够控制镇流器供电的内侧灯管，如本例所示：

SPECIAL FEATURES: DAYLIGHT HARVESTING
Some sensors can work with a light sensor to turn OFF the lights in response to sufficient ambient daylight and/or prevent the lights from reactivating as long as sufficient daylight is available. The setting is typically adjustable and can be overridden.
特殊功能：日光采集
一些传感器用光传感器工作在熄灯环境下，响应发生只要有足够的环境日光即可或是主要有足够的日光就可重新激活。所述设置通常可调和可复位。

SPECIAL FEATURES: COMBINATION DIMMER/OCCUPANCY SENSOR
Some wall switch sensors combine the functionality of an occupancy sensor and dimmer. The lights can be switched or dimmed based on occupancy.
Dimming fluorescent and HID lighting requires a compatible dimmable ballast.
特殊功能：组合调光/占用传感器
一些墙壁开关传感器结合了占空传感器和调光器的功能。该灯可以通过切换调节或是基于占用的光环境的明暗进行调节。
调光荧光灯和HID灯需要一个兼容的调光镇流器。

SPECIAL FEATURES: ISOLATED RELAY
Some power packs and/or sensors contain a separate small low-voltage switch for control of and interfacing with additional loads such as HVAC, security and building automation systems. For example, people entering a building after hours trigger not only the required lighting, but also heating or air conditioning as well.
特殊功能：隔离继电器
一些电源包或传感器包含了一个独立的小低压开关进行控制或是额外的负载，例如空调，安防和楼宇自动化系统的接口。例如，人们进入建筑物后一段时间，不仅需要照明，暖气或空调。

LIGHT LOGGERS
Since energy savings delivered by occupancy sensors can be highly variable, developing an economic analysis often involves a number of assumptions. As another solution, some manufacturers offer devices that are temporarily installed in an existing facility for which occupancy sensors are being considered. These devices analyze how long the lights were left on while the monitored space is unoccupied. The data can then be downloaded into software for more accurate energy savings projections and analysis.
LIGHT记录仪
由于占空传感器节约的能源可提供大范围可变的，发展的经济分析，而这些分析往往涉及若干假设。另一种解决方案，部分厂家报价的装置是临时安装的感应器是现有的设施设备。这些器件分析灯亮多久都是在同时监测空间没人的情况下。这些数据可以被下载到软件从而进行更准确的能量节约的预测和分析。