Bimetal Thermostat Ceramics play a role as the insulating, connecting,
supporting components in a variety of bimetal thermostats, temperature
controllers, thermostat switches, they are one of earliest advanced ceramic
parts which used in electrical industries. Bimetal Thermostat Ceramics,Bimetal Thermostat Zjt-1B Ceramic,Hot Press Bimetal Thermostat Ceramics,Good Hardness Ceramics For Bimetal Thermostat Jinghui Industry Ltd. , https://www.industrialcerams.com
The thermostat ceramics are regularly made from 95% alumina or steatite,
all of them could offer super insulation strength and mechanical properties.
Our factory has been producing various of thermostat ceramics over 10
years, including a dozen of standard types for ceramic pins, ceramic washers,
Ceramic Tubes, ceramic holders, also we support custom-made ones as per
customers' specification. All of these ceramic parts will be fully inspected by
auto imaging system inspection machine. So the quality from every batch can be
guaranteed.
Security products are varied! Such as monitors, cameras, hard disk recorders and so on. While people are concerned about the use of results, another concern is the service life.
The service life of various types of security products varies and varies.
The life of a CRT monitor is approximately 60,000 hours, which is based on the life of the picture tube. The nominal number of monitors varies from monitor to monitor, and it is theoretically possible to use 8 to 10 years.
The service life of the LCD monitor is calculated based on the service life of the LCD screen. The service life of the LCD screen is mainly determined by two aspects. The first is the aging speed of the screen, and the second is the lifetime of the backlight lamp.
The quality of the screen is an important factor in determining the aging speed. Excessive brightness will greatly accelerate the aging of the screen and shorten the life of the screen. The lifetime of a high-quality LCD within a reasonable brightness range can reach 50,000 hours or more. Industrial LCD screen life is probably less than 70,000 hours. This is basically the same, basically this life.
As for the service life of the camera, the life span of the surveillance camera is one year and ten years. It mainly depends on the quality and the use environment. Of course, no one stipulates how long it will take and there is no national document. We must know that video cameras are the most embarrassing products for electrical and electronic products. We all know that the use of the environment is harsh. Normally there are no problems in the next 3-5 years.
In addition infrared camera infrared light manufacturing principle. Infrared lamps are mainly manufactured in three modes: halogen lamps, multi-chip LEDs, and single-chip LEDs.
Halogen is a very old technology. It has high energy consumption, amazing heat output, and short service life. Due to its low efficiency, it does not really work long distances. It is estimated that it will exit the market soon.
Multi-chip LED is a very deceptive technology that needs to fight back. There are two main types of multi-chip LEDs, one is the "piranha", which contains 4 to 8 chips, and the other is an array of light-emitting chips. Why do multiple chips?
Their theory is: Infrared light is not enough because the distance is not enough energy, more chips together, of course, the energy is large, take it for granted that the irradiation distance is longer, this is a typical amateur technical theory? Of course, farther distances require more energy, but not how much infrared light is emitted by the infrared light, but how much infrared light is used by the camera.
Because of its inherent inherent disadvantages, multi-chip LEDs have no light-emitting focus, the luminescence optical system is unreasonable, and the useful light efficiency is relatively low (of course, several times stronger than halogen lamps).
The advantages did not come into play, and fatal injuries came out. For example, arrayed LEDs, whose current is as high as 1000 mA or more, are basically just a penny coin size, and heat dissipation becomes a problem. The most afraid of LED is the high fever, it is not bad to blame it. At the same time, the production requirements of multi-chip LEDs are very strict. Each chip cannot have a slight difference in performance. Otherwise, one chip is broken and the whole machine is finished. In general, the life of multi-chip LEDs is far from enough compared to single-chip LEDs.
Single-chip LED production process is simple, easy to ensure quality, low calorific value, light emitting optical system is reasonable, is to do the ideal amount of infrared light device, the theoretical life of up to 100,000 hours or more.
So, is the lifetime of all single-chip LED lights good? In fact, far from it. There are many reasons for this, for example, some LED chips are very low level, impurities exceeded; some production processes but off, there is leakage; some use of super power, rated 20mA, use more than 50mA; some no protection circuit, or circuit design Unreasonable, these can cause the single-chip LED infrared lamp to break quickly.
In order to ensure the longevity of infrared cameras, we must first use high-grade LED chips. High-grade chips have large power, good consistency, high luminous efficiency, and low heat generation. A high-grade LED is 10 times better than ordinary LED. Of course, the price is very expensive. Second, the design of the optical system should be reasonable, uniform light emission, high utilization, and fast heat dissipation.
Third, strict control of the voltage, the LED is very sensitive to the voltage, the voltage is slightly higher, the LED die will burn off; slightly lower, the amount of light will be greatly reduced. It is best to match high-quality switching power supply. According to China's harsh power environment, it is better to input voltage from 170V to 270V. Fourth, the input power line is preferably made of high-temperature, low-temperature, ultra-soft and bend-resistant.
There is a manufacturer of infrared light, the input power cord can be used in low temperature minus 60 degrees, 250 degrees above zero at normal use, minus four, fifty degrees as soft as silk, showing its professionalism, this product can only be trusted.
DVR Lifetime Technology Precautions The life of equipment such as hard disk recorders and detectors, there is currently no technical protection office regulations and corresponding documents. The hard disk video recorder is divided into two types: PC architecture and embedded system. It excludes human damage and the PC architecture's virus impact. Generally, there will be no major problems in 3-5 years. Good quality can be used for 6-8 years is not a problem.
Because this type of equipment operates 24 hours a day, the working environment of the hard disc recorder is very important. If it is too hot or dirty, it will seriously affect the equipment life. If you want to extend the life of your hard disk recorder, it is best to install the equipment in a constant temperature and humidity room. There are no relevant regulatory documents for such devices.
Invasion detector lifetime: Active infrared intrusion detector, passive infrared intrusion detector, microwave intrusion detector, microwave and passive infrared intrusion detector, ultrasonic intrusion detector, vibration intrusion detector, magnetic switch intrusion detector, ultrasonic and Passive infrared intrusion detector. These products such as active infrared detectors, the general use of the environment is outdoor, the majority of the service life is between 3-5 years, good quality can be used for 6-8 years.
Indoor infrared detectors, ultrasonic, microwave passive infrared detectors have a longer life expectancy, generally can use 5-6 years, good quality can be used for about 10 years.
Anti-theft alarm controller, anti-theft alarm host: contains lines, wireless anti-theft alarm control, transmission, display, storage and other equipment. The power consumption of these devices is relatively large, they are frequently used, and they work without interruption for 24 hours. The general service life is 3-5 years.
To understand the service life of the video intercom system, we have to talk about some of the tricks of building intercom products. With the increasingly widespread use of floor apartment intercom, the competition in the industry has become increasingly fierce. Many manufacturers have used their own advantages in product technology and have resorted to various means for engineering and real estate companies that belong to the “disadvantaged†group. Listed below are some of the methods that are commonly used. Please ask consumers to increase your eyes. Do not let the manufacturer’s propaganda blind.
Video intercom without video line. This is represented by a video intercom manufacturer in Shenzhen. Don't use video cable, how to transmit video? Manufacturers use multi-core shielded cable, with one of the core to replace the traditional video cable. We know that the bandwidth and impedance matching of the transmission line have a large impact on the picture. Using this type of shielding line, neither the bandwidth nor the impedance can meet the requirements.
Even though the subjective image can be received, the actual signal has been greatly lost, and the black and white image cannot be seen, but it is unbearable under the color signal. The effect may not be seen at a short distance, but the distance is a little longer, especially for online video, and the image effect is definitely a mess.
Two core lines enter the home. Most small manufacturers use this type of publicity. Do not think that you only need two wires, the actual situation is two lines - a video line SYV 75-3 (or 75-5), a multi-wire RVV 5 * 0.5 (or 6 * 0.5, etc.). This method is used by many manufacturers, including what the two bus or something.
Engineers and friends may take great care not to think that they can save money online. There are also some manufacturers, because the product line is more, in the promotion will choose the most provincial way of wire as a selling point, and when actually need what function, do not know how many lines need to add.
Secondary black and white picture tube. According to a company’s marketing staff, a large video intercom manufacturer in Shenzhen purchased a large number of secondary black-and-white imaging modules each month. The secondary product is actually the manufacturer's defective product (non-conforming product). The defects, distortion rate, and vacuum rate cannot reach the target and the service life is limited. However, because it is a defective product, the price is less than half that of the primary product.
When you encounter a factory with black and white video intercom prices are particularly low, you have to play 12 points. Some manufacturers who claim to be "absolutely using the first-level tube" are not a bit "no silver three hundred and two" here?
Used color LCD screen. Because color intercom prices and profits are relatively good, in order to seek greater profits, some manufacturers will reach out to the old color LCD screen. Most of these second-hand color LCD screens are Japanese goods, EPSON, SHARP, and TOSHIBA. Due to the earlier production time, the display effect is very poor, but because of the used goods, the life cannot be guaranteed. So when you ask for replacement for two years, no manufacturer will promise you. In particular, the EPSON screen may not succeed for a year or even when debugging.
New color LCD screen. According to new things, there is no trick to play, but there are still vendors. The 4-6.4-inch screen has a resolution of 320×234, but some people say it is 960×234. Why? Explain to the customer that my product has a high resolution and good image quality. What is the actual situation? Because the liquid crystal is driven by three primary colors, that is, each point is synthesized by three points of R, G, and B, and 320×3=960, so high resolution is obtained.
Three-way calling. It is not the same time that three parties can talk at the same time, but the door to the room, the room to the center, the center to the door can talk to each other. It is also confusing to talk about households, because intercoms are mostly bus-based systems, which are bound to make other users unable to use. Some manufacturers try to solve this problem by using multi-channel methods, but you need to see what you are buying.
Under normal circumstances, if manufacturers choose new good quality ICs, picture tubes and LCD screens and other components, the service life of building video intercoms can be maintained for at least 5-8 years, but it is very regrettable that manufacturers are pursuing more. The economic benefits and values, many of the products of the cottage are using disassemble screens and used pipes, the quality can not be guaranteed, can use more than three years are problems,
The service life of the parking plant management system and the community card system, parking lots management system The majority of the service life of the electronic systems or networks that automatically log in, monitor and manage the vehicles entering and leaving the parking garage (field). In 5-8 years, among them, the management host is used frequently and its lifetime is slightly shorter.
Each security product manufacturer's after-sales, maintenance, and warranty will be different. The after-sales service of general security products is consistent with the state-provided electronic products. One-year free warranty, and some will increase or reduce the warranty time according to their actual situation.
May 03, 2023