英國CLASS的CARGO-SAFE艙口蓋超聲波泄漏儀特點(diǎn)和優(yōu)勢
The Cargo-Safe and Door-Safe receivers unparalleled performance.
The signal from the ultrasonic transmitter is a bi-tone, slightly above and slightly below 40 kHz. Therefore, the receivers must exclusively capture these two very close frequencies. Any other frequencies produced by machinery, welding, repair work, or possibly from fluorescent lighting, must be rejected by the receiver. Any noise interference would show up on the receiver's display and be heard in the headphones which increases the display reading above the true value and obscuring the transmitter's bee-boo sound in the headphones. When the signal to the receiver is weak the display error can be significant. for instance at the critical time when readings are being taken from the closed hatch cover. Consequently, it is essential that the receiver only registers the transmitter sound and nothing else. The Class Instrumentation receiver has a unique capability to filter out all other sounds outside the transmitter's precise frequency range of 40 kHz, making it unparalleled in recording reliable and error-free results; essential requirements for an error free ultrasonic receiver.
貨物保險(xiǎn)箱和門保險(xiǎn)箱具有無與倫比的性能。
超聲波發(fā)射器的信號(hào)是雙音，略高于和略低于40kHz。因此，接收器必須專門捕獲這兩個(gè)非常接近的頻率。接收器必須拒絕機(jī)械、焊接、維修工作或熒光燈產(chǎn)生的任何其他頻率。任何噪聲干擾都會(huì)出現(xiàn)在接收器的顯示器上，并在耳機(jī)中聽到，這會(huì)使顯示器讀數(shù)高于真實(shí)值，并掩蓋耳機(jī)中發(fā)射器的蜂鳴聲。當(dāng)接收器的信號(hào)較弱時(shí)，顯示錯(cuò)誤可能會(huì)很大。例如在從關(guān)閉的艙口蓋讀取讀數(shù)的關(guān)鍵時(shí)刻。因此，接收器必須只記錄發(fā)射器的聲音，而不記錄其他聲音。Class Instrumentation接收器具有獨(dú)特的能力，可以過濾掉發(fā)射器40 kHz頻率范圍之外的所有其他聲音，使其在記錄可靠和無誤差的結(jié)果方面無與倫比；無誤差超聲波接收器的基本要求。
Transmitter Emitter testers for hatch-cover testersare crucial for ensuring accurate measurements.These transmitters employ multiple emitters to create a uniform spread of ultrasound. Each emitter must operate at maximum power to produce this even distribution. The uniform spread of ultrasound is essential to ensure consistent energy levels impact the entire hatch-cover seal. This consistency allows the open-hatch value (OHV) to be measured anywhere around the hatch-cover, yielding reliable decibel readings. The pass/fail criteria for hatch-cover seals are standardised at 10% of the OHV. Thus, it is vital that each emitter functions at maximum power to maintain consistent ultrasound throughout the ship's hold.
Testing the output of each emitter requires individual assessment using a calibrated emitter tester. Class Instrumentation Ltd includes a dedicated emitter tester in their Cargo-Safe hatch-cover testing kit. This tester is used before each survey to verify the transmitter's proper operation, ensuring compliance with all hatch-cover testing regulations. Class Instrumentation Ltd provides these essential tools.
艙口蓋超聲波泄漏儀的發(fā)射器---發(fā)射器對(duì)于確保準(zhǔn)確測量至關(guān)重要。
這些發(fā)射器采用多個(gè)發(fā)射器來產(chǎn)生均勻的超聲波傳播。每個(gè)發(fā)射器必須以功率運(yùn)行，以產(chǎn)生這種均勻的分布。超聲波的均勻傳播對(duì)于確保一致的能量水平影響整個(gè)艙口蓋密封至關(guān)重要。這種一致性允許在艙口蓋周圍的任何地方測量打開艙口值（OHV），從而產(chǎn)生可靠的分貝讀數(shù)。艙口蓋密封件的合格/不合格標(biāo)準(zhǔn)標(biāo)準(zhǔn)為OHV的10%。因此，至關(guān)重要的是，每個(gè)發(fā)射器都以功率工作，以在整個(gè)船艙內(nèi)保持一致的超聲波。
測試每個(gè)發(fā)射器的輸出需要使用校準(zhǔn)的發(fā)射器測試儀進(jìn)行單獨(dú)評(píng)估。Class Instrumentation有限公司在其貨艙