The current conference modes mainly include remote video conferences and local conferences. The audio and video acquisition methods of these two kinds of conferences are essentially different. Therefore, there are two types of conference video recorders in the market, video conference recorders and local conference recorders. A unit that sometimes opens video conferences and sometimes opens local conferences will need to purchase two products, a video conference recorder and a local conference recorder, respectively, which greatly increases the procurement costs. The newly launched MR-01 HD DVR from Shenzhen ChunYuan Liying Electronic Technology Co., Ltd. not only meets the requirements for recording audio and video for remote video conferences, but also meets the requirements for recording local conferences. It is only necessary to purchase one product. Greatly reduce the cost of business!

First, video conference video requirements for hard disk video recorders
Remote videoconferencing is the installation of a videoconferencing terminal device connected to the monitor in each conference room distributed in different locations. Through the Internet, they can see each other on their respective monitors and can interact with each other. The feature of the video conference terminal equipment is that, in the multi-screen mode on the local monitor, the remote party's video and own video can be seen, and the other party's audio can be heard. However, in order to shield the noise of omnidirectional microphones, their audio is not transmitted locally and can only be transmitted to the other party. The method of recording a video conference is that, between the video conference terminal device and the display, a conference video recorder is installed both from the output interface of the terminal device to the input interface of the video recorder, and then from the video recorder to the display. There is also input from the matrix to the recorder first, and then from the recorder to the monitor.
The basic requirements for recording video conferences on video recorders:
1. The video recorder must have an input interface corresponding to the output interface of the video conference terminal device. Current videoconferencing endpoint devices generally have HDMI output interfaces, with a few being DVI interfaces and individual VGA interfaces.
2. It must support the input recording of the resolution frames output by the output interface of the videoconferencing terminal device and support high-definition real-time playback. The resolution frame number of the HDMI output of most video conference terminal devices is 1080P60hz. If the recorder only supports 720P60, it cannot be used.
3, video recorders must be compatible with HDCP protocol, can record all types of encrypted video. Currently listed videoconferencing endpoint devices are embedded with the international standard HDCP protocol. If the video recorder is not compatible with the protocol, recording is not allowed.
4, the input interface of the recorder must have a wide range of adaptability. Because video conference video, most of the direct output from the video conferencing terminal equipment interface directly to the recorder, and sometimes need to input from the matrix to the recorder. Many video recorders do not support matrix input signals. Therefore, videoconferencing video recorders must be compatible with all types of input devices.
5, video recorder must have a good mix of features. The HDMI interface of the video conference terminal device outputs the remote and local video signals and the remote audio signals. After the HDMI is input to the video recorder, the recorded data is missing the local audio. If you want to integrate local sound with remote and local video, and achieve remote local audio and video synchronization recording, you need to input audio into the VCR locally through a mixer or wired or wireless microphone during a conference. Conventional video recorders do not have the ability to input additional analog audio, and videoconferencing video recorders must support the re-input of analog audio and the perfect harmony of HDMI audio and video signals.
6, video recorders must support large-capacity hard disk recording for a long time. Because some video conferences are open for a long time, and HD recording takes up a lot of hard disk space, if the video recorder is not compatible with large-capacity hard disks, it will not be sufficient. Video recorders that only support SD cards, TF cards, or USB flash drives cannot be used.
7. Recorder's hard disk recording preferably has redundant video recording function. The so-called redundant video recording means that the same content can be recorded on two hard disks simultaneously. Because the conference is difficult to reproduce, if the recorded hard disk is damaged, the conference data can no longer be found, and it has a redundant function, there is no worry.
8. The video recorder for recording video conferences can preferably have a built-in hard disk and can easily copy the conference information recorded into the hard disk to an external mobile hard disk or USB flash drive. Because there are more participants and the ingredients are different, the hard disk is better built-in for the sake of protecting the hard disk and the convenience of operation. The convenient backup copy is convenient for editing the data in the late session.
9, video recorder output interface as much as possible and support a variety of display device connection. Sometimes there are more people attending the meeting. If there is only one monitor, the following personnel will not be able to see clearly.
10, video recorders to support real-time side-by-side record, put side record. This function can detect whether the recording is successful or look back at the recorded or recording video at any time.
Second, the local meeting video on the hard disk recorder requirements
The local conference not only refers to the general meeting room, but also includes classroom teaching, training training, theatrical performances, group gatherings, birthday parties, etc.
Recording audio and video of local conferences is more complicated than recording video conferences. In addition to meeting the above ten requirements for recording video conferences, it is particularly important that the following two requirements must also be met:
1. The area of ​​a local conference venue is different. Sometimes it is necessary to set up multiple HD cameras. Therefore, the video recorder must also support multi-channel cameras to input and record at the same time.
2. When opening a local conference, not only one host speaks, but sometimes three or five people in different positions speak into the microphone. The recorder must be able to support the input of multiple channels of analog audio input to a home screen video to achieve simultaneous audio and video recording. .
Of course, the input interface of the conference recorder must also correspond to the output interface of the high-definition camera.
Third, the MR-01 function parameters, meet the requirements of recording video conferences, local meetings
MR-01 multi-function HD DVR not only meets the requirements for recording remote video conferences and local conferences, but also has more functions and more humanity, such as remote network live sharing, management functions, multi-channel video at the same time The recording function, etc., is more convenient to use, especially with four-channel analog audio input smart tuning function, perfectly meeting the mixing requirements of the conference recording. The specific function parameters are as follows:
1, with 1 HDMI, 1 VGA, 2 HD-SDI input interface. The four-way video interface can be input at the same time or optionally at the number of channels, and can be recorded simultaneously or optionally recorded.
2, HDMI, VGA input supports 1080P60Hz and the following types of parameters; SDI input supports 1080P25hz and the following types of parameters.
3, HDMI input compatible with HDCP protocol, you can record a variety of encrypted video.
4, HDMI input supports multiple analog audio mixing, can mix up to 4 audio at the same time to achieve simultaneous recording of multiple audio. 5, with 4 audio input interfaces for HDMI input mixing, four tuning knobs, you can easily adjust the volume level or turn off, turn on one of the input channels. VGA, SDI input video can also be set to mix according to customer needs.
6. It has 3 analog audio input interfaces corresponding to 1 VGA and 2 HD-SDI video inputs.
7, with 1 HDMI audio and video output interface; 1 VGA, 2 AV video output interface. At least three display devices can be externally output at the same time.
8, with 1 analog audio output interface, can be external power amplifier or active speaker.
9, with 3 USB ports, support wired or wireless mouse operation or external mobile hard disk for data copy.
10, with a LAN adaptive network port, support for connecting routers or switches to the Internet.
11, support boot automatically video, recording at any time, scheduled appointments video, motion detection video. You can record while putting, while putting records.
12. Recorded video resolution is 1080P25/30HZ or the following parameters. Recorded video format is H264 format. Output playback can be set up to 1920*1080P60hz and the following kinds of parameters.
13, support built-in 2 largest 3TB 3.5-inch serial hard disk. Two hard disks can be set to record disks one by one, or one disk can be set as a recording disk, one disk can be a redundant disk, and the same content can be recorded on two hard disks at the same time, and the data can be saved more safely.
14. You can set the hard disk to record from the earliest time after full recording or stop recording after the full record is over.
15. Video recorded to the internal hard disk can be copied from the USB external hard disk or U disk. Copy format can be AVI or H264 format.
16, with the input 1080P60 resolution, each input recording video takes about 1.8GB of space for an hour. 4-way video input at the same time, occupying 7.2GB hard disk space for one hour.
17. The operation mode supports wired or wireless mouse operation.
18, the output screen supports live video and playback of the four-screen synchronization output, single-screen zoom full-screen output. You can set up a single-screen or four-screen display.
19, support four high-definition video synchronization without delay real-time output. Playback supports channel selection and time retrieval.
20, after networking, support for local area networks or the Internet using computers, mobile phones for remote live broadcast or on-demand, can also be used to remotely control the computer. Supports 10 remote client visits at the same time. Support remote and local VCR voice intercom.
21, network protocol compatibility: 1 RS-485, supports a variety of PTZ TCP / IP, UDP, DHCP, DNS, PPPOE, DDNS, Email protocol.
22. It supports the display of video icon, time stamp, channel name on or off, and can also modify the channel name.
Fourth, MR-01 product appearance display
Fifth, the breakthrough products of digital HD video recorders have epoch-making historical significance
The MR-01 HD DVR can meet the requirements of recording video conferences and local conferences. It not only reduces the company's procurement costs, it is more convenient to install and operate, it is more convenient to use, and it can be used with various videos on the current market. The output interface of the conference terminal device corresponds to the output interface of the current common high-definition camera for the conference, and can successfully support the input of the high-definition resolution frames of various types of playback devices, and the recorded video reaches the highest definition parameter currently available. In particular, the intelligent tuning and mixing function, multi-channel simultaneous recording of high-definition, remote network broadcast control, scheduled recording, and no-delay live broadcasting are fundamentally different from conventional hard disk recorders. The rich features and excellent performance of the MR-01 are not only the perfect model for recording meetings, but also the ideal model for high-definition fans recording Blu-ray high-definition players, DVs, home-recording digital TV set-top boxes, and recording karaoke dubbing. In particular, the new listing of the aircraft, during the promotion, the price is excellent, whether it is a unit purchase, personal use, or joining the distribution have a very high price and rate of return!
(For more HD DVR information, please search "Chun Yuan Li Ying" on the web, and visit Chun Yuen Technology Network for more information!)

Bow Spring Centralizer

1.Function
1) Take casing to designed position by reducing sticking while casing going down.
2) Centralize casing in well.
3) Balance liquid pressure in annular space by reducing adhesion phenomenon.
4) Improving replacing ratio of mud and boosting cementing quality by reducing channeling effect.

2. Characteristics of Bow Spring Centralizer:
1) Designed for high restoring force and low starting and running force
2) The larger bows provide complete centralization in vertical or slightly deviated wells.
3) Due to the flexibility of bows, they can pass through narrow hole sections and expand in the targeted locations.
4) Undergo special coating process to prevent from rust
5) For hinged bow spring casing centralizers, end collars are designed with self-locking action, which are easy to assemble and can be shipped in half assembled condition for less shipping and storage costs.

3. Characteristics for Rigid Casing Centralizers:
1) Shock, impact and corrosion resistant.
2) High tensile and yield strengths.
3) Available with straight or spiral blades.
4) Helps ensure positive centering in deviated or horizontal holes.

Casing centralizers,Bow spring manufacturer

Puyang Junhong Rubber Co., Ltd. , https://www.pyjhxs.com