安全光幕/光柵的分辨率有多重要？
WHAT IS THE IMPORTANCE OF THE RESOLUTION OF YOUR SAFETY LIGHT CURTAIN/BARRIER?
光幕有多條光束，非常適合檢測手指或手等小物體。安全光幕的分辨率與光束之間的距離有關(guān)。14 毫米分辨率用于檢測手指，30 毫米分辨率用于檢測手或身體的較大部位。
行人通道光幕通常有 2/3 或 4 條光束。
分辨率 R = I + D（其中：I = 兩個相鄰光學(xué)元件之間的軸間距 & d = 鏡頭直徑）
A light curtain has multiple light beams, which makes it ideal for the detection of small objects such as fingers or hands. The resolution of the safety light curtains relates to how close the light beams are together. 14mm resolution is designed to detect fingers, 30mm resolution is to detect hands or larger parts of the body.
Pedestrian access light curtains are usually 2/3 or 4 beams.
Resolution R = I + D (where: I = Interaxes between two adjacent optics & d = Lens diameter)
光幕/光柵的各種安全功能
VARIOUS SAFETY FUNCTIONS OF LIGHT CURTAIN/BARRIERS
旁路"靜音"
BYPASS "MUTE"
在一些應(yīng)用和自動過程中，出于實際原因，可能有必要斷開遮光罩的安全功能。使用光保護(hù)靜音需要對機(jī)器進(jìn)行風(fēng)險評估，以確定繞過光保護(hù)是否存在任何風(fēng)險。在以下情況下可以使用旁路：
? 在自動過程中輸入或輸出時影響光保護(hù)的材料
? 物料處理需要操作員處于影響光保護(hù)的位置
? 機(jī)器處于安全位置
為了實現(xiàn)安全，需要至少具有兩個相互獨(dú)立信號的復(fù)制和監(jiān)控旁路系統(tǒng)。應(yīng)選擇構(gòu)成屏蔽功能的安全相關(guān)部件的性能等級，以便屏蔽功能的引入不會降低相關(guān)保護(hù)功能所需的安全等級。
In some applications and automatic processes, for practical reasons it may be necessary to disconnect the safety function of the light shield. The use of a mute on light protection requires a risk assessment of the machine to find out if there are any risks with bypassing the light protection. Bypass can be used in the following circumstances:
? Material that affects light protection when input or output in the automatic process
? Material handling requires the operator to be positioned so that the light protection is affected
? The machine is in safe position
To achieve safety, a duplicated and monitored bypass system with at least two mutually independent signals is required. The performance level of the safety-related parts that make up the muting function shall be selected so that the introduction of the muting function does not lower the required safety level for the relevant protection function.
手動啟動功能
MANUAL START FUNCTION
當(dāng)光柵/光幕損壞時，會向危險區(qū)域內(nèi)的危險機(jī)器發(fā)出停止信號，并且復(fù)位燈會亮起。要重新啟動機(jī)器，必須先復(fù)位光柵/光幕。
這是通過復(fù)位按鈕完成的，該按鈕必須位于無法從受保護(hù)區(qū)域內(nèi)觸及的位置。
對復(fù)位功能有很高的要求。也就是說，短路或組件故障都不能提供自動復(fù)位。
當(dāng)復(fù)位按鈕被激活時，輸出被激活，復(fù)位燈熄滅。
注意！復(fù)位安全電路只能允許重新啟動機(jī)器。
When a light barrier / light curtain is broken, a stop signal is given to dangerous machines within the risk area and a reset light comes on. To restart the machine, the light bar / curtain must first be reset.
This is done with a reset button that must be positioned so that it cannot be reached from inside the protected area.
Great demands are placed on the reset function. That is, neither a short circuit nor component failure must provide automatic reset.
When the reset button has been activated, the outputs are activated and the reset light goes out.
NOTE! Resetting the safety circuit should only allow the machine to be restarted.
固定 / 浮動消隱
FIXED / FLOATING BLANKING
消隱使得可以將一根或多根光束與遮光罩的保護(hù)區(qū)域斷開。這樣做的目的是允許例如工具和材料進(jìn)料通過保護(hù)區(qū)域而不向機(jī)器發(fā)送停止信號。有兩種版本可供選擇：固定和浮動消隱
固定消隱
在“固定消隱”中，物體不能在保護(hù)區(qū)內(nèi)移動，但必須始終阻擋相同的光束。如果一個人移除物體，則會向機(jī)器發(fā)送停止信號。
浮動消隱
浮動消隱可以將最多三條光束從保護(hù)區(qū)域斷開。然后，物體可以在保護(hù)區(qū)域內(nèi)移動，而不會向機(jī)器發(fā)送停止信號。
注意！重要的是要記住分辨率會更高，并且必須重新計算保護(hù)距離。
Blanking makes it possible to disconnect one or more beams from the protection field of the light shield. The purpose of this is to allow e.g. tools and material feeds pass the protective field without sending a stop signal to the machine. Available in two versions, Fixed and Floating blanking
FIXED BLANKING
In "Fixed blanking" the object can not move in the protection field, but the same beams must be blocked at all times. If one e.g. removes the object, a stop signal is sent to the machine.
FLOATING BLANKING
Floating blanking makes it possible to disconnect up to three beams from the protective field. The object can then move in the protective field without a stop signal being sent to the machine.
NOTE! It is important to keep in mind that the resolution will be higher and that you must recalculate the protection distance.
啟用靜音
MUTE ENABLE
用作第三個靜音信號。換句話說，啟用靜音的信號。當(dāng)連接到電機(jī)接觸器時，此功能非常適合在運(yùn)輸路徑中使用。當(dāng)軌道運(yùn)行時，會向光保護(hù)發(fā)出信號，表示可以靜音。這樣，就很難操縱保護(hù)裝置并進(jìn)入危險區(qū)域。
Acts as a third muting signal. In other words, a signal that enables muting. This function can be good to use in transport paths when connected to the motor contactor. When the track goes, a signal is given to the light protection that muting is possible. In this way, it is difficult to manipulate the protection and to enter a dangerous area.
覆蓋
OVERRIDE
即使由于靜音序列中的錯誤導(dǎo)致一個或多個安全光束被阻擋，覆蓋也可以暫時將光保護(hù)的安全輸出驅(qū)動到“突變”位置一段固定的時間。
例如，托盤卡在保護(hù)區(qū)內(nèi)，安全出口被破壞，并發(fā)出停止信號。只要托盤阻擋保護(hù)區(qū)，就無法重置光保護(hù)。
激活覆蓋功能可啟用光保護(hù)的保護(hù)
Override makes it possible to temporarily drive the safe outputs of the light protection for a fixed period of time to a "mutated" position even when one or more safe beams are blocked due to errors in the muting sequence.
For example, a pallet gets stuck in the protection field, whereby the safe exits are broken and a stop signal is given. As long as the pallet blocks the protection field, it is not possible to reset the light protection.
Activation of the Override function enables the protection of the light protection
級聯(lián)耦合
CASCADE COUPLING
級聯(lián)連接意味著可以將多個單元串聯(lián)起來?？偸菑倪B接在安全電路中的主設(shè)備開始，而所謂的從設(shè)備則由主設(shè)備控制。典型的應(yīng)用是所謂的“L”變體。
By cascade connection is meant that you can connect several units in series. You always start from a master that is connected in the safety circuit and the so-called slave is controlled by the master. Typical application is the so-called "L" variant.
EMD - 外部設(shè)備監(jiān)控
EMD - EXTERNAL DEVICE MONITORING
外部接觸器監(jiān)控。接觸器的 1 個常閉觸點通過 24v 連接到光幕上的專用輸入。如果一個或多個接觸器焊接，則無法重置光幕。
External contactor monitoring. 1 NC contact from the contactor is connected via 24v to a dedicated input on the light curtain. The light curtain cannot then be reset if one or more contactors have welded.
光幕有兩種使用方式：垂直和水平。
LIGHT CURTAINS CAN BE USED IN TWO WAYS, VERTICALLY AND HORIZONTALLY.
垂直安裝的光幕通常用于檢測手指和手，或用于行人出入控制。
水平安裝的光幕最常用于檢測站在危險機(jī)器前的人。
安全光幕的特點：
? 消隱/靜音
? 范圍 60 米
? 級聯(lián)耦合
? 手指/手保護(hù)
? 無需軟件
? SIL 3 / PL e
? 保護(hù)區(qū)域，150-1800 米
Vertically mounted light curtains are usually used to detect fingers and hands, or for pedestrian access control.
Horizontally mounted light curtains are most commonly used to detect a person standing in front of a dangerous machine.
Features of safety light curtains:
? Blanking / muting
? Range 60 m
? Cascade coupling
? Finger / hand protection
? No need for software
? SIL 3 / PL e
? Protective field, 150-1800 m
聲明：
- 文章轉(zhuǎn)載自O(shè)ME AUTOMATIC，由愛澤工業(yè)翻譯，如有侵權(quán)，請聯(lián)系刪除！
- 如有偏頗，歡迎指正！
