At present, it is generally accepted that the matching distance between a viewing distance and a screen size refers to the best effective viewing angle of the same distance. High-definition picture sense requires a 16:9 widescreen and a large-sized tablet to achieve the best display effect. If the resident family's distance to watch TV is 1.7, 2.0, 2.4, 2.5, 2.7, 3.0, and 3.3 meters, you want to maximize the effect of television resolution, the required size of the flat-panel LCD TV is 26, 32, 37, 40. , 42, 47, 52 inches.
After looking at the map, it was discovered that the 48-inch LCD TV should be placed in either 3.5M or 3.0M. Xiaobian recommends several 48-inch LCD TVs here.
PHILIPS 48PFF3061/T3 48-inch Full HD LED LCD TV
Price 1999 yuan
Philips uses point-by-point high-definition picture quality processing technology to enhance picture quality in various aspects such as details, colors, layering, and motion picture, bringing vivid and natural high-definition picture quality. Full HD 1920×1080P LCD resolution brings high-definition video to restore true-to-view details. Intelligent noise reduction enhances the definition of the picture quality and automatically increases the vividness of the color. The sharpness enhances the sense of image hierarchy and makes every picture vivid and exquisite. Philips virtual surround sound and audiophile technology, which processes signals through electronic and acoustic principles, simulates surround sound without the need for additional sound, allowing you to enjoy rich stereo sound.
Haier Card 48K5 48 Inch Android Smart Network Narrow Frame Full HD LED LCD TV
Price 1899 yuan
Built-in Android 4.4 operating system, Internet, games, chat, viewing many content applications in one, want to download and download. Built-in WIFI allows you to get rid of the network cable trouble.
TCL D48A710 48 Inch Android Smart LED LCD TV
Price 2299 yuan
Using the patented technology of mixed dimming, the brightness segment of normal viewing by the user adopts DC dimming to solve the problem of bright and dark flickering of the screen. In addition, the EMC circuit is optimized to achieve a comfortable, non-flashing, healthy eye protection effect. The dynamic backlight adjustment technology realizes the sub-zone adjustment of the screen brightness, which not only can increase the screen layering in different areas of light and shade, but also can enrich the performance of the dark area and further improve the image quality. The use of an independent four-wheel-drive loudspeaker power supply design ensures sufficient power while instantly multiplying the bass effect, greatly enhancing the fidelity of the sound, and providing clear and full sound quality. Dolby Digital Plus's digital audio decoding technology enables 7.1-channel separation. Whether you are watching movies, TV shows, or online video, you can always enjoy a cinematic listening experience.
Toshiba 48L25EBC 48-inch Android Smart Full HD LCD TV
Price 2599 yuan
With REGZA's high-definition technology, the color, sharpness, and contrast of the TV screen are dramatically improved. Using smart imaging technology, using Dolby audio technology.
Changhong 48S1 48 inch APP Control Android Smart LCD TV
Price 1999 yuan
Using high-definition quality engine, chip-level optimization tuning. Using matrix light control technology, the brightness of the backlight automatically compensates for changes in the picture. The picture has a rich gradation and bright colors. Powerful 10-core processing engine enhances overall TV operation speed and online video processing speed. Built-in Dolby sound technology, bass ring design and dialogue enhancement, the built-in body sound continues to provide a quality viewing experience.
Leading intelligent media in the field of intelligent technology, never follow others, only seeking to break through - search the public number "Wisdom Power Grid" pays attention to WeChat micro-channel, fresh cool technology information immediately grasp.
Piezoelectric ceramic disc
Quick delivery
High performance
Application: flow meter measurement
There are many kinds of USF used in closed pipeline according to the measuring principle, and the most commonly used are propagation time method and Doppler method. Among them, time difference ultrasonic flowmeter is used to measure fluid flow by the principle that the time difference of sound wave propagating downstream and countercurrent is proportional to the velocity of fluid flow. It is widely used in raw water measurement of rivers, rivers and reservoirs, process flow detection of petrochemical products, water consumption measurement of production process and other fields. According to practical application, time-difference ultrasonic flowmeter can be divided into portable time-difference ultrasonic flowmeter, fixed time-difference ultrasonic flowmeter and time-difference gas ultrasonic flowmeter.
Ultrasonic flow-meters use at least two transducers aligned so that ultrasonic pulses travel across the flow of liquid or gas in a pipe at a known angle to the flow.
Technical data:
Electromechanical coupling coefficient Kp: > 0.62
Dielectric Loss tg δ: <2%
Nominal Piezo discs for ultrasonic flowmeter:
OD14.2*1MHz PZT-51
OD14.6*1MHz PZT-51
OD15*1MHz PSnN-5
OD15*2MHz PSnN-5
OD20*1MHz PSnN-5OD20*2MHz PSnN-5
OD15*1MHz PZT-51
OD15*2MHz PZT-51
OD20*1MHz PZT-51OD20*2MHz PZT-51
Size, Frequency and Electrode on request.
Piezoelectric Discs For Flowmeter Sensor
Piezoelectric Ceramic Disc,Piezoelectric Disk Flow Meter,Piezoelectric Flow Sensor,Piezo Discs Flowmeter
Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com