On the application, development and present situation of underwater video recorder in commercial diving

In commercial diving, it involves a variety of underwater video equipment, mainly in the form of underwater video recorder, underwater surveillance system, underwater camera and so on. Underwater Video Recorder (VCR) refers to a complete set of equipment in which divers carry underwater cameras, transmit video to land by wired way, and watch and record video through the main machine of VCR. Underwater surveillance system refers to an integrated system in which one or more cameras are fixed under the water to monitor and record underwater video through a hard disk recorder on the shore. Other types of underwater video equipment include underwater cameras, underwater camcorders, and other types that have screens and allow divers to photograph themselves while underwater. This paper mainly introduces the application, development and present situation of underwater video recorder in commercial diving. Underwater monitoring system is mostly used for monitoring the working environment and video recording in the fields of aquaculture and scientific research. Underwater cameras and video cameras are mostly used for recreational diving, and ROV is used as the carrier of video equipment. This paper will not introduce too much.   Application of underwater video recorder in commercial diving   1. Underwater detection   Bridges, docks, ship, dam, offshore wind, offshore platform and submarine pipeline, culverts and so on all need to detect and record video on a regular basis, in order to understand the workings of these facilities, equipment, and archive in the form of video, to ensure that these facilities, able to timely maintenance equipment, safe operation, and history archives. In this application, the ground technician usually watches the picture on the main camera and directs the diver through the diver's walkie-talkie. The diver holds a front-end underwater camera and a headlight to take pictures of a specific underwater target.   2, construction work site record   Compared with the construction on land, commercial diving operation has the characteristics of high risk and high cost. Therefore, it is very important to make a detailed video recording of the underwater operation. This kind of application form is usually for the diver to wear underwater camera and light on the diving helmet or mask, the land technician and safety personnel watch the picture through the main video recorder, and direct the diver to carry on the construction operation through the underwater intercom.   3. Underwater video search   Underwater video search involves the field of emergency rescue, including underwater search for drowning people, drowning vehicles, etc., and this kind of application is mostly towed and vertical. When large area is searched, underwater camera, lighting and sonar probe can be carried on the fish tow, and side scan and video search can be carried out under the water by the boat towing the fish tow. For example, the location of the salvage object has been determined by sonar. The underwater camera and light can be lowered from the water surface to the specific location for video confirmation.   4. Other fields   Underwater video is widely used in the field of evidence collection in criminal investigation, underwater archaeology, underwater surveying and mapping, Marine pasture, underwater robot and intelligent identification of underwater objects, and plays an important role in all of them.   Second, the necessity of underwater video recorder application in commercial diving   1. Provide video basis for detection data   In underwater detection, divers need to measure and record a large amount of data. However, due to the limitation of divers' working environment, and the different understandings of divers on the data measurement process and measurement methods, the data provided by divers alone may be biased. Using underwater video recorders, a technician can guide and supervise the divers' measurements while on land, and video recordings can provide visual evidence of the measurements.   2. Provide reliable basis for operation plan customization and safety assessment.   Through the video uploaded by the underwater camera carried by the divers, on-site technicians and safety management personnel can monitor the underwater operation situation in real time, effectively master the working environment and conditions, and make reasonable operation plan according to the actual situation. If the working environment and conditions change and are not suitable for continuing the operation, the diver's operation can be terminated in time.   3. Accumulation of construction experience and case filing   The cost of commercial diving operations is high, the risk is high, and there are many kinds of operations. The operation process and operation plan can be recorded by video, which can effectively accumulate and share the operation experience. Archiving the implemented projects as cases contrib

Underwater Emergency Rescue Specialized Committee Seminar on "Underwater Facility Placement Technology and Equipment" was held in Tianjin

Haiyun Dive answers the decompression problems of free diving

Many people think that free diving does not use compressed gas, so there is no problem of decompression sickness, especially the depth of our leisure level.

Diving guide

Diving is a very interesting sport, but you should pay attention to the following points when participating in diving

Haiyun Diving teaches you how to cope with diving in strong currents

If you accidentally enter the strong downflow zone, remember to constantly remind yourself not to be nervous, keep calm, pay attention to breathing and ear pressure, and must not be nervous and excessive.

Haiyun Dive introduces you to common diving injury symptoms and first aid

In view of the fact that newcomers are easily injured to a certain degree during diving, they are not sure what is wrong and how to solve it after injury. Therefore, I have sorted out this issue and shared with you that even if you are not a rescue diver or a diver above the level, you can use it for emergency in the event of such injuries.

Diving skills: Coping skills for diving in strong currents

If you accidentally enter the strong downflow zone, remember to constantly remind yourself not to be nervous, keep calm, pay attention to breathing and ear pressure, and must not be nervous and excessive.

Poland will open the deepest pool of 45 meters

How deep is the general swimming pool? Do you have a concept? Most of them are about 100 centimeters to 200 centimeters, even deeper than 200 centimeters! But this year Poland will break the record and open a "deepest" swimming pool in the world! This "deepest swimming pool in the world", called "DeepSpot", is located in the central city of Msxczonow in Poland and will be officially opened this fall. The "deep pit" swimming pool will reach a depth of 45 meters, about 11 to 12 floors high, which is even more amazing than the current record holder, a 5 meter deep swimming pool in Montegrotto Terme, a northern town in Italy A great record-breaking building.