When the surveillance camera is not online, it usually occurs when the webcam is installed. If the analog camera has a similar situation, the video is displayed without a video signal. If the monitor camera is not online on the display, you can solve it as follows:
1.First check if the line is smooth
During the actual installation monitoring process, there are many factors that cause the monitoring line to be interrupted. For example, the crystal head is not pressed, the interface is not fixed, or the IP address of the camera is not in the same address segment as the back-end recorder.
2.Can use the ping command to detect
Using the ping command is the easiest and most direct way to detect whether the camera line is unobstructed. Generally, there are only two types of results. One is pingable and the other is pinging.
(1) The situation that can be pinged
If the surveillance analog outdoor cctv camera display is not online, but the ping command can be used to ping, then the line from the camera to the recorder is intact. Under normal circumstances, the image can be displayed. The reason why there is no image display, it is likely that the camera settings or some parameters do not match, such as onvif protocol, such as video compression format, etc., this time use the computer to access the camera and change the camera configuration.
(2) Cannot ping through
If the ping fails the analog video bullet surveillance camera, it means that the middle line is not smooth. You can follow the first method to see if the crystal head is not ready or the interface is not connected. In addition, there may be problems with the camera itself. You can try to power off the camera, or use a laptop to connect directly to the camera and use the ping command again.
Flat Hollow Inductor, a single-layer coil is wound around a paper tube or bakelite skeleton with insulated wires. Such as transistor radio medium wave antenna coil.
Ferrite cores and iron powder core coils, Flat Hollow Inductor's inductance depends on the presence or absence of a magnetic core. Inserting a ferrite core into an air-core coil can increase the inductance and improve the quality factor of the coil.
Copper-core coils, copper-core coils are widely used in the ultra-short wave range. The position of the copper core in the coil is used to change the inductance. This adjustment is relatively convenient and durable.
The color-coded inductor is a kind of high-frequency Flat Hollow Inductor, which is made by winding some enameled wire on the magnetic core and then encapsulating it with epoxy resin or plastic. Its operating frequency is 10KHz to 200MHz, and the inductance is generally between 0.1uH and 3300uH. Color-coded inductors are inductors with a fixed amount of inductance. The method of marking the inductance is marked with a color ring in the same way as a resistor. Its unit is uH.
Choke coils (chokes), coils that restrict the passage of alternating current are called choke coils, and are divided into high-frequency choke coils and low-frequency choke coils.
In order to obtain a larger inductance value, air core inductors are often wound with more enameled wire, and in order to reduce the influence of the line resistance of the inductor itself on the DC current, a thicker enameled wire must be used. However, in some smaller products, it is not practical to use a very heavy air core inductor, which not only increases the cost, but also limits the size of the product.
In the beginning of the production process of cloth chinese lanterns, lanterns need to be determined first, and then measured on site. Generally speaking, the designer of the lantern group is the soul of lantern production. According to the requirements of the park, he can design beautiful lanterns according to local conditions, so that the art of lanterns can be closely combined with local culture, which can form a distinctive regional theme. After the plan is determined, the designer can perform field measurements to determine the specific size of the lantern.
Then you need the artist to stake out and outline the skeleton, which can be transformed from actual drawings into actual lanterns. This requires rich imagination and changing the "front view" on the pattern into a "stereoscopic view". Most people think that the skeleton of the lantern is made of bamboo and wood products, or is made of thin iron wires, but this is not true. Because the strength of bamboo, wood products and thin iron wires are not enough, it is relatively easy to deform and flammable. Therefore, the general lantern frame is made of steel bars with a diameter of 5-8 mm, and the producer generally cuts the steel bars into small sections Then it is welded again, so the lamp bone of each segment needs to be calculated very accurately, otherwise it will affect the viewing effect of the entire lamp group.
Welders are alive and well, and a prototype is built. A steel bar with a diameter of 5-8 millimeters is usually broken as soon as it is welded. This phenomenon does not occur when the welder is welding when the lantern is produced. Because the lanterns have formed an industry in Kaifeng, after welding by the welder, the lantern components are connected one by one, and the "brown shape" of the lantern is formed.
The electrician is meticulous, preventing electricity from transmitting light. After making a prototype, the next step is to install a light bulb. The industry term is called internal penetration. In this link, you need to take protective measures for safe electricity consumption in accordance with relevant standards, and protect electrical circuits and lamps from leakage . As an electrician in the production team of the lamp group, it is necessary to check repeatedly after the production is completed to ensure that the lamp group has no dark dead corners as much as possible.
Paper color separation, color display, after finishing the prototype and the penetration, then you need to carry on the prototype on the prototype. The satin used in the lantern is called satin in the industry. Satin fabric with good reflectivity, bright color and strong durability. This satin is glued to the frame of the lantern, and then beautified and adjusted by the artist.
Of course, according to the original design pattern, more than a dozen different colors of satin may be used. This work is very tedious and is called "color separation and papering." Only a group of lanterns can be basically completed and show their charm. Generally speaking, a group of colored lights with a length of about 6 meters requires at least 50 man-hours for binding. Therefore, a large-scale lantern show was full of the wisdom and hard work of the lantern workers.