1, optical fiber usually has SC, ST, FC and other types of interface, and we simulate the wireless monitoring device is the AV interface, if the two are to communicate with each other is not direct communication, the signal must be converted, this time It is necessary to use analog optical transceivers to convert optical signals to analog signals.
A video optical transceiver is a device that converts one to multiple analog video signals through various encodings into optical signals through optical fiber media. The analog optical transceiver adopts the PFM modulation technology to transmit the image signal in real time. The transmit end first performs the PFM modulation on the analog video signal, and then performs the electro-optical conversion. After the optical signal is transmitted to the receiving end, the optical-electrical conversion is performed, and then the PFM demodulation is performed to recover the video signal. Due to the use of PFM modulation technology, the transmission distance can reach 50KM or more. Through the use of wavelength division multiplexing technology, it is also possible to realize bidirectional transmission of image and data signals on a single optical fiber to meet the actual needs of the monitoring project.
2. If the optical fiber wants to communicate with a wireless bridge, and the wireless bridge is an RJ45 interface, then we just need to use a digital optical transceiver to convert the front-end fiber signal into an RJ45 signal, and then transmit the signal through a wireless bridge.
Since digital technology has obvious advantages in many respects compared with traditional analog technologies, digital technology has just replaced analog technology in many fields. The digitalization of optical transceivers is also an inevitable trend. There are mainly two kinds of digital video optical transceivers: one is an MPEG11 video compression digital optical transceiver, and the other is a digital non-compressed video optical transceiver.
The image compression digital optical transceiver generally adopts MPEG11 image compression technology. It can compress moving images into N*2Mbps data streams and transmit them through a standard telecommunication interface or directly through optical fiber. Due to the use of image compression technology, it can greatly reduce the signal. Transmission bandwidth.
The all-digital uncompressed video optical transceiver adopts all-digital non-compression technology, so it can support any high-resolution active, still-image distortion-free transmission; overcome the conventional analog FM, phase modulation, and amplitude modulation. , Disadvantages of environmental interference, poor transmission quality, and low stability in long-term operation. And support audio two-way, data bidirectional, switch bidirectional, Ethernet, telephone and other signals in parallel transmission, convenient field wiring, plug and play.
Optical transceivers can be divided into 2 optical transceivers, 4 optical transceivers, 6 optical transceivers, 8 optical transceivers, 16 optical transceivers, and even more (32, 64, 128) optical transceivers. Specifically how to choose according to your specific project situation.
Wireless bridge and optical fiber connection diagram:
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A 3-Axis CNC Machining Center/Mill is used for creating various industrial parts. This is achieved by using a wide-range of tooling and cutters depending on the type of material being cut and the end product being manufactured.
A 3-axis CNC Mill works on three separate axes:
X-Axis: Moving longitudinally or [left-to-right"
Y-Axis: Moving laterally or [front-to-back"
Z-Axis: Moving Vertically or [up-and-down"
CNC Vertical Machining Centers can include an additional axis to do specific cutting applications.
Rotary Tables are common as a 4th Axis on mills. They can vary in size and weight capacities and can have a horizontal or vertical configuration. They are generally an add-on to a standard 3-axis mill. The mill will have to have a proper 4th axis interface (generally a 4th axis card, drive and CNC Control) to accept a 4th axis rotary table.
Trunnion Tables can also be an add-on to a vertical CNC Mill. A Trunnion table adds a 4th and 5th axis to a standard mill by incorporating an A-Axis (which rotates around the X-Axis) as well as a C-Axis (which rotates around the Z Axis).
A true 5-axis machine can allow for continuous 5-axis machining simultaneously. This increases both speed and accuracy when machining the part.
CNC Vertical Mills generally have a single spindle, automatic tool changer, work table and CNC Control.
The spindle on a CNC Machining Center can have a wide range of speeds depending on what material is being cut and the depth of cut that is required. Typical spindle speed ranges from 0 to 10,000 RPM. Higher speeds are used for lighter materials including graphite and aluminum among others. Higher speeds can reach 12,000 RPM up to 50,000 RPM and higher.
The Spindle is loaded with tool holders and cutters to achieve the proper material removal. There are many different styles of tool holders including BT and CAT – which have a conical shape as well as HSK, which uses flanges instead of a taper to lock the holder in place. BT and CAT Holders can come in various sizes including 30, 40 and 50 taper depending on the size of tool the cutter requires. HSK (Hollow taper ShanK) comes in a variety of types – A through F – and sizes from HSK-32 up to HSK-160. HSK is considered a better tool holder for high speed machining as there is more surface contact between the spindle and the holder, reducing vibration and keeping the tool from pulling back into the receiver when cutting at high speeds.
A CNC Vertical Machining Center offers different styles of automatic tool changers as well. The most common style is the umbrella-style. This is where the tool holders are loaded into the carousel vertically. The other style is a drum or side-mount style. The tools are loaded in horizontally in this type. This allows for greater part height in the work area and can help accommodate a rotary table, fixture or any additional work holding devices mounted to the table.
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