Integrated Ultrasonic Level Meter

DLM551 Integrated Ultrasonic Level Meter, DLM552 Integrated Ultrasonic Level Meter

It uses advanced micro-processor and special EchoDiscovery Echo processing technology. The ultrasonic level meter can be used in the many harsh environments and offer high accuracy measurement. There is temperature sensor in the instrument which can do temperature compensation. This ultrasonic transducer adopts advance acoustic match patented technology which make the transmit power can be radiated more efficiently and realize accuracy measurement.

SHANGHAI AUTOMATION INSTRUMENTATION CO. LTD.

NO. 5 AUTOMATION INSTRUMENTATION FACTORY

Shanghai Yi Electric Actuator

SHANGYI ELECTRIC ACTUATOR

SHANGYI BRAND

SHANGZIYI THEMOCOUPLE AND PRESSURE GAUGE

	DLM551	DLM552
application	Liquid measurement especially water industry	Liquid measurement especially water industry
Measure range	liquid：0.25….4m	liquid：0.4….8m
Process connection	GI 1/2A	G2A
Case material of transducer	PTFE、PU/PC	PTFE、PU/PC
Process temperature	-40…70℃	-40…70℃
Process pressure	-0.2…1bar	-0.2…1bar
Signal output	Two-wire/four-wire 4…20mA/HART	Two-wire/four-wire 4…20mA/HART

 

	DLM553
application	Liquid media
Measure range	Liquid：0.5….15m
Process connection	Flange or hanger
Case material of transducer	PU/PC
Process temperature	-40…70℃
Process pressure	-0.2…1bar
Signal output	Two-wire/four-wire4…20mA/HART

principle

According to the principle of signal detection Ultrasonic flow meter can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method and frequency difference method), beam shift method, Doppler method, cross correlation method, And noise and so on.

Ultrasonic flowmeter and ultrasonic flowmeter, as the instrument flow channel does not set any obstructions, are unimpeded flowmeter, is suitable for solving the flow measurement problems of a class of flow meters, especially in large diameter flow measurement is more prominent The advantages of it is one of the rapid development of a class of flowmeters.

Ultrasonic flowmeter using time difference measurement principle: a probe transmission signal through the tube wall, the media, the other side of the tube wall, was received by another probe, while the second probe the same signal was received by the first probe , Due to the influence of the medium flow rate, there is a time difference Δt between the two, and the conversion relation V = (C2 / 2L) × Δt between the flow rate V and the time difference Δt can be obtained from the calculation, and the flow rate Q

advantage

Ultrasonic flowmeter is a non-contact instrument that can measure both large diameter media flow and can be used for measurements that are less accessible and observed. It is very accurate measurement, almost no interference with the various parameters of the measured medium, in particular, can not solve other instruments can not be strong corrosive, non-conductive, radioactive and flammable and explosive media flow measurement.

Disadvantages

The shortcomings of the present invention are mainly that the temperature range of the measured fluid is limited by the temperature tolerance of the coupling material between the ultrasonic transducer and the transducer and the pipe, and the original data of the measured velocity of the measured fluid at high temperature is incomplete. At present, China can only be used to measure the fluid below 200 ℃. In addition, the ultrasonic flowmeter measurement line than the general flow meter complex. This is because the general industrial measurement of liquid flow rate is often a few meters per second, while the sound wave in the liquid in the propagation speed of about 1500m / s or so, measured fluid flow rate (flow) changes to bring the maximum speed of change is 10- 3 orders of magnitude. If the accuracy of the measured flow rate is 1%, the accuracy of the measurement of the speed of sound to be 10-5 ~ 10-6 order of magnitude, it must have a perfect measurement line can be achieved, which is Shanghai Automation Instrumentation Co., Ltd. Ultrasonic Flowmeter only in the rapid development of integrated circuit technology under the premise of the practical application of the reasons.

Shanghai Automation Instrumentation Co., Ltd. ultrasonic flowmeter by the ultrasonic transducer, electronic lines and flow display and accumulation system composed of three parts. Ultrasonic emission transducer converts electrical energy into ultrasonic energy and emits it to the measured fluid. The ultrasonic signal received by the receiver is amplified by an electronic circuit and converted into an electrical signal for the representative flow. The display and the integrated meter are displayed And total. This enables the detection and display of traffic.

Ultrasonic flowmeter commonly used piezoelectric transducer. It utilizes the piezoelectric effect of the piezoelectric material, and uses the appropriate emission circuit to apply the electric energy to the piezoelectric element of the transmitting transducer to produce ultrasonic vibration. The ultrasonic waves are propagated at a certain angle into the fluid and then received by the receiving transducer and turned into electrical energy by the piezoelectric element for detection. The transmitting transducer utilizes the inverse piezoelectric effect of the piezoelectric element, while the receiving transducer utilizes the piezoelectric effect.

Ultrasonic flowmeter transducer piezoelectric components are often made into round flakes, vibrating along the thickness. The diameter of the sheet exceeds 10 times the thickness to ensure the directionality of the vibration. Piezoelectric element materials are mostly lead zirconate titanate. To fix the piezoelectric element, the ultrasonic wave is injected into the fluid at a suitable angle, and the element is put into the acoustic wedge to form the whole transducer (also known as the probe). Acoustic wedge material not only requires high strength, anti-aging, and requires ultrasonic vibration by the wedge after the energy loss is small that the transmission coefficient close to 1. Commonly used wedge material is plexiglass, because it is transparent, you can observe the sound wedge in the assembly of piezoelectric components. In addition, some rubber, plastic and bakelite can also be used for wedge material.

Features

◆ unique signal digital processing technology, the instrument measurement signal is more stable, anti-interference ability, more accurate measurement.

◆ No mechanical transmission parts are not easy to damage, maintenance-free, long life.

◆ circuit is more optimized, high integration, low power consumption, high reliability.

◆ intelligent standard signal output, friendly man-machine interface, a variety of secondary signal output, for your choice.

◆ tube-type small diameter measurement is economical and convenient, high precision measurement.

SHANGHAI AUTOMATION INSTRUMENTATION CO. LTD.

NO. 11 AUTOMATION INSTRUMENTATION FACTORY

Shanghai Yi Electric Actuator

SHANGYI ELECTRIC ACTUATOR

SHANGYI BRAND

SHANGZIYI THEMOCOUPLE AND PRESSURE GAUGE