双张材料传感器 UDC-18GM50-255-3E1产品说明书百度网盘下载链接：https://pan.baidu.com/s/11Mi3ewdEOMWoEHifTsqMiw 提取码： wiq7

采用超声波检测原理，检测是否两个薄板材粘连在一起，比如常见的钣金折弯行业，需要检测棒材是否2张粘在一起。

倍加福双张材料传感器用于可靠检测无、单张或者双张重叠材料的超声波系统，更适宜检测纸。

1. 不需要TEACH-IN
2. 从所有角度都可以看见功能指示灯
3. 对印刷物、颜色和光亮的表面不敏感
4. 材料重量冲 10 g/m2 到超过 2000 g/m2
5. 可检测的材料范围广，可检测纸、薄的金属以及塑料和金属薄膜
6. 根据不同的检测面需要可垂直或倾斜安装传感器
7. 参数可选

Description of sensor functions

The ultrasonic double sheet monitor (UDC) is used in all situations in which the automatic distinction between single and double sheets is required in order to protect machines or avoid waste production. The double sheet monitor is based on the ultrasonic through-beam principle. The following can be detected:

• No sheet, i. e. air
• Individual sheet
• Double sheet or multiple sheets (no distinction can be made for the numberof sheets)

A microprocessor system evaluates the signals. The appropriate switch outputs are set as a result of the evaluation. Changes in ambient conditions such as temperature and humidity are compensated for automatically.

Working principle

The measuring principle of the double sheet control is based on measuring and evaluating the transmitted sound amplitude through a sheet of paper. If there is no paper, no sound is absorbed and the received signal reaches its maximum level. If there are two sheets of paper, one on top of the other, almost all of the signal is absorbed due to multiple reflection between the layers.

The amplitude of the signal passing through thus reaches a minimum level.

The thicker or denser a given type of paper is, the lower the portion of sound that will pass through it according to the working principle. Because of this, the functionality of the double sheet control is limited to types of paper that fall within a specific range. Paper that is too thin allows too much sound to pass through so that it is not sufficiently different from air. On the other hand, paper that is too thick absorbs so much of the sound that the amplitude for single sheets is already in the range of a double sheet.

Therefore, the double sheet control offers the user 4 different programs for different ranges of material, making it possible to adjust to the ideal setting for different applications. There is no need to perform TEACH-IN for single sheet. This makes the product more user-friendly. Fluttering movements of the paper do not affect reliable operation of the UDC.

Function input

Function input (wire colour pink, PK) is used to adjust the sensor and assign
parameters to it. The following functions are available:

• Alignment aid
• Program selection
• Output pulse extension

During normal operation, the function input must always be securely connected with +UB or -UB, to avoid possible interference or improper functionality.

Measuring system

A complete unit consists of an ultrasonic emitter unit and an evaluation and receiver unit. The sensor heads are optimally adjusted to each other when they leave the factory. Therefore, they should not be used separately or exchanged with other devices of the same type. The plug connector on the emitter/receiver connection cable is only intended to be used for easier mounting,not to replace units.

Installation and adjustment

Correct functionality of the sensor can only be ensured if the emitter and receiver are adjusted so they are exactly centred on each other. This condition is automatically fulfilled if the MH-UDB01 mounting aid (see chapter 8 "Accessories" on page 16) is used. In addition, the UDC-18GM50 offers an electronic alignment aid (see chapter 6.6.1 "Alignment aid" on page 11).

Recommended spacing between the sensor heads:d = 40 mm ... 45 mm

Angular misalignment: α < +/- 1°

Maximum misalignment: s < +/- 1 mm