In this article we introduce the basic principle of supersonic measure distance and analyze the structure and frequency characteristic of supersonic sensor .

u672cu6587u4ecbu7ecdu4e86 u8d85u58f0u6d4bu8dddu7684u57fau672cu539fu7406uff0cu5bf9u8d85u58f0u4f20u611fu5668u7684u7ed3u6784u53ca u9891u7387u7279u6027u8fdbu884cu4e86u5206u6790u3002

Using supersonic and speed - frequency variable technology the computer vector automatic mixing control system based on single chip microprocessor has been designed .

u901au8fc7u8fd0u7528 u8d85u58f0u6ce2 u68c0u6d4bu6280u672fu548c u53d8u9891u6280u672fuff0cu5f00u53d1u4e86u57fau4e8eu5355u7247u673au7684u77e2u91cfu81eau52a8u914du6bd4u88c5u7f6euff1b

Simulation and Research of Supersonic - Frequency Induction Water-Heater Based on MATLAB

u57fau4e8e MATLABu8d85 u97f3u9891u611fu5e94u52a0u70edu70edu6c34u5668u7684u4effu771fu4e0eu7814u7a76

Shock cell structure plays a crucial role in the generation of jet screech and broadband shock noise in supersonic jet . The shock cell spacing is a fundamental parameter for predicting the jet screech frequency .

u5728 u8d85u58f0 u901fu5c04u6d41u566au58f0u7684u4ea7u751fu4e2duff0cu55b7u5634u51fau53e3u7684u6fc0u6ce2u6805u683cu7ed3u6784u6709u5173u952eu7684u4f5cu7528uff0cu6fc0u6ce2u6805u683cu7684u95f4u8dddu662fu63a8u6d4bu6fc0u6ce2u566au58f0 u57fau9891u7684u57fau672cu53c2u6570u3002

No matter the boundary layer is subsonic or supersonic nonparallel effects are obvious at the critical Reynolds number such that the critical Reynolds number is reduced and the frequency range of unstable disturbances is broadened at the critical Reynolds number .

u65e0u8bbau662fu5728u4e9au97f3u901fu8fd8u662f u8d85u97f3u901fu8fb9u754cu5c42u4e2duff0cu975eu5e73u884cu6027u7684u5f71u54cdu5728u4e34u754cu96f7u8bfau6570u5904u6bd4u8f83u660eu663euff0cu5177u4f53u662fu4e00u4f7fu5f97u4e34u754cu96f7u8bfau6570u53d8u5c0fuff0cu4e8cu4f7fu5f97u4e34u754cu96f7u8bfau6570u5904u589eu957fu6270u52a8u7684 u9891u7387u8303u56f4u53d8u5f97u66f4u5927u3002

This paper introduces simply a 100 kW 20 kHz supersonic frequency induction heating power supply using IGBT modules .

u4ecbu7ecdu91c7u7528IGBTu7ec4u6210u7684 100kw20kHz u8d85 u97f3u9891u611fu5e94u52a0u70edu7535u6e90u3002

A 25 ~ 55 kHz serial DC chopping IGBT supersonic frequency induction heating power supply is introduced and the topology and operating principles of the power supply are described .

u4ecbu7ecdu5de5u4f5cu9891u7387u4e3a25uff5e55kHzu4e32u8054u578bu76f4u6d41u65a9u6ce2IGBT u8d85 u97f3u9891u611fu5e94u52a0u70edu7535u6e90u7684u57fau672cu7ed3u6784u548cu63a7u5236u539fu7406u3002

Linear subsonic supersonic and hypersonic analysis indicates that the vehicle is prone to body-freedom flutter resulting from the decrease in vibration frequency of the all-moveable wing at a high flight dynamic pressure .

u7ebfu6027u4e9au97f3u901fu7684u3001 u8d85u97f3u901fu7684u4ee5u53cau9ad8u8d85u58f0u901fu5206u6790u8868u660eu673au6784u7531u4e8eu5168u52a8u5e73u5c3eu5728u9ad8u52a8u538bu4e0bu632fu52a8 u9891u7387u7684u964du4f4eu800cu975eu5e38u5bb9u6613u4ea7u751fu673au4f53u81eau7531u98a4u632fu3002

Based on middle and supersonic frequency induction heating power supply The continuous produce of spring wire was realized and has been applied in industry .

u901au8fc7u4e2du9891u53ca u8d85 u97f3u9891u7535u6e90u611fu5e94u52a0u70edu7684u65b9u5f0fuff0cu5b9eu73b0u4e86 u6cb9 u56deu706bu5f39u7c27u94a2u4e1du7684u8fdeu7eedu751fu4ea7uff0cu5e76u5728u5de5u4e1au751fu4ea7u4e2du5230u4e86u5f88u597du5e94u7528u3002

In the design of supersonic wave treatment equipments the key factor to output efficiency is the acoustic resonance frequency tracking technology .

u5728 u8d85u58f0u6ce2u6cbbu7597u4eeau7684u8bbeu8ba1u4e2duff0cu58f0u5b66u7cfbu7edfu8c10u632f u9891u7387u81eau52a8u8ddfu8e2au6280u672fu662fu4fddu8bc1u8f93u51fau6548u7387u7684u5173u952eu56e0u7d20u3002

Improvement on Distortion of Roll-teeth Mould by Supersonic Frequency Induction Hardening

u8d85 u97f3u9891u6decu706bu6539u5584u8f67u9f7fu6a21u7684u7578u53d8

A Kind of Shield Method Used to Suppress Supersonic Impinging Jet Discrete Frequency Noise

u8d85u97f3u901fu51b2u51fbu5c04u6d41u79bbu6563 u9891u7387u566au58f0u7684u5c4fu853du6291u5236u65b9u6cd5

Then the supersonic ejector is used the high frequency noise will take place when the pressure in store tanks decreases to a specific value and the environment of tube area of the station is affected .

u4f46u4f7fu7528 u8d85u97f3u901fu5f15u5c04u5668u540euff0cu5f53u7403u7f50u538bu529bu4e0bu964du5230u67d0u4e00u503cu65f6u4f1au4ea7u751f u9ad8u9891u566au58f0uff0cu5f71u54cdu7ba1u675fu533au64cdu4f5cu73afu5883u3002

Study on Phase Tracing for Supersonic Frequency Induction Heating Power Supply Using IGBT

IGBT u8d85 u97f3u9891u611fu5e94u52a0u70edu7535u6e90u76f8u4f4du8ddfu8e2au7684u7814u7a76

This paper introduced the application of infrared ray supersonic wave high frequency laser radioisotope microwave and acoustic emission technology to wood industry .

u4ecbu7ecdu4e86u7ea2u5916u3001 u8d85u58f0u3001 u9ad8u9891u3001u6fc0u5149u3001u540cu4f4du7d20u3001u5faeu6ce2u3001u58f0u53d1u5c04u3001u8ba1u7b97u673au7b49u8fd1u4ee3u6280u672fu5728u6728u6750u5de5u4e1au4e0au7684u5e94u7528u6982u51b5u3002

Serial IGBT Type Supersonic Frequency Induction Heating Power Supply

u4e32u8054u578bIGBT u8d85 u97f3u9891u611fu5e94u52a0u70edu7535u6e90