CN2413273Y

CN2413273Y - Ultrasonic oil-water interface detector

Info

Publication number: CN2413273Y
Application number: CN 00216765
Authority: CN
Inventors: 朱士明; 梁军汀; 卢杰
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2000-03-09
Filing date: 2000-03-09
Publication date: 2001-01-03
Anticipated expiration: 2010-03-09

Abstract

The utility model relates to an ultrasonic oil-water interface detector, which adopts a three-way type probe which is composed of two level measuring tubes and a vertical measuring tube. The utility model adopts an ultrasonic method to measure sound velocity (the sound velocity of oil and water) in an upper and a lower level measuring tubes under the real-time temperature and sound velocity (the mixing sound velocity of oil and water) in the vertical measuring tube, and temperature compensation can be automatically carried out and the height of oil-water interface in the vertical measuring tube can be worked out by a computer. The utility model has the advantages of simple structure and convenient operation; the utility model can measure continuously and automatically in the field, and change conditions of the interface can be displayed intuitively and exactly at charts and digital forms and can be stored for calculating and printing further, so the measurement precision of the oil-water interface is less than 1 mm.

Description

Ultrasound wave water-oil interface detector

The utility model relates to a kind of detector that adopts the ultrasonic measurement water-oil interface.

The detector that is used to measure water-oil interface at present has: 1. capacitance Oil vs Water Boundary Detecting Instrument, it mainly is located at the position that the capacitance variations that forms between electrode in the container and the water calculates water-oil interface in the container by measurement.But electrode is immersed in the profit for a long time, and the erosion that is subjected to profit can change gradually, influences the accuracy of capacitance measurement and the position at fluid interface.2. ultrasound wave profit detector that adopts the ultrasonic principle of two-beam, it launches ultrasound wave by the ultrasonic transducer that is arranged on two different frequencies in oil vessel bottom in container, by measuring in hyperacoustic two-way time that two transducers send and the container speed of ultrasonic propagation in the oil product, calculate the interface of profit in the container, this detector is not temperature compensated, can't revise the sonic velocity change that causes oil and water owing to temperature variation, influence the accuracy of measuring.Above-mentioned detector generally all is used for oil vessel, and the water that is deposited in the container for discharging provides information, because these instruments itself can not be used for water-oil interface are controlled demanding commercial production.

The utility model provides a kind of velocity of sound that can distinguish METHOD FOR CONTINUOUS DETERMINATION oil and water at the scene voluntarily, can accurately measure water-oil interface height, control water-oil interface again continuously, has the ultrasound wave water-oil interface detector of the numeral demonstration of auto thermal compensation function.

The utility model is made up of computing machine, single-chip microcomputer (comprising radiating circuit, amplifying circuit, Zero crossing level testing circuit or door, timing door, high frequency crystal oscillator markers, ROM, CPU) and three way type probe.The three way type probe is made up of the vertical survey pipe with of upper and lower two levels survey pipe, surveys between the pipe to be communicated with each other, and whole probe is connected on the profit container by connecting pipe as bypass, is full of tested oil and aqueous solution in the probe.On the limit, two ends of each survey pipe a slice piezoelectric chip is installed respectively and is used for hyperacoustic transmitting and receiving.With ultrasound wave measure respectively upper and lower two levels survey real time temperature in the pipe down oil and during the sound of water (velocity of sound) and vertical when surveying the profit compound voice that records in the pipe (velocity of sound), automatically carry out temperature compensation and calculate the particular location of water-oil interface by computing machine, and the amplitude of fluctuation of water-oil interface position is controlled by computing machine, the whole on-line continuous that is measured as is carried out, and the precision that water-oil interface are measured is better than 1mm.

Characteristics of the present utility model are: adopt by two levels and survey the three way type ultrasonic probe that the vertical survey with of pipe pipe constitutes, when utilizing directly measurement level of ultrasonic technique to survey the sound of oil in the pipe and water (velocity of sound), measuring vertical is surveyed the position of the water-oil interface in the pipe, whole measurement is carried out continuously automatically, and can revise automatically at any time since the profit sonic velocity change that causes of temperature variation to the influence of interface level measurement precision, measurement result is intuitively accurately shown with chart and digital form by computing machine and can store, further calculate or print, the measuring accuracy height, easy to operate.

Accompanying drawing is the utility model embodiment, wherein:

Fig. 1 is the utility model fundamental diagram;

Fig. 2 is the structural representation of probe 10 among Fig. 1;

Fig. 3 is transceiver circuit figure.

The utility model will be further described in conjunction with the accompanying drawings.

Fig. 1, single-chip microcomputer main body 3 are respectively with

radiating circuit

4 ₁, 4 ₂, 4 ₃An end and Zero crossing

level testing circuit

6 ₁, 6 ₂, 6 ₃An end connect.

Radiating circuit

4 ₁, 4 ₂, 4 ₃The other end and transmission piezoelectric wafer 15, connect

reception amplifier

5 ₁, 5 ₂, 5 ₃Input end with receive piezoelectric chip 15 ₁Connect output terminal and Zero crossing

level testing circuit

6 ₁, 6 ₂, 6 ₃An end connect Zero crossing

level testing circuit

6 ₁, 6 ₂, 6 ₃The other end with or door 7 be connected, timing door 8 one ends are connected with crystal oscillator markers 9, the other end is connected with single-chip microcomputer main body 3, computing machine 2 is connected with display screen 1 with single-chip microcomputer main body 3.

Fig. 2, three way type probe 10 is surveyed pipe 18 and vertical survey by level and is managed 19 and constitute to be threaded.

Piezoelectric chip

15,15 ₁One side be attached on the corrosion resistant plate 16, another side directly welds with cable, cable is drawn and radiating circuit 4 by the wire hole on the cover plate 13 12 ₁, 4 ₂, 4 ₃,

reception amplifier

5 ₁, 5 ₂, 5 ₃Circuit connects.Corrosion resistant plate 16 is pushed down by cover plate 13, and tightens a cover plate 13 difference sealing and fixing with screw 14 and manage on 19 two ends with vertical survey at level survey pipe 18.Survey in upper and lower two levels and also respectively to be provided with a hole 17 on the pipe 18 and to be used for being connected, so that vertical to survey the interior interfacial level of water-oil interface height and container in the pipe 19 identical with the top and the bottom of profit container 11.

The triggering emission start signal that Fig. 3, single-chip microcomputer main body 3 transmit launches monostable 20, the square wave drive emission power tube G1 conducting that to produce a width be the wafer resonant frequency, produce a sound wave pulse by capacitor C 1 stimulated emission piezoelectric chip 15, propagate and reception piezoelectric chip 15 over there in the liquid of this sound wave pulse in surveying pipe ₁On excite one corresponding to the electric signal that arrives acoustical signal.Received signal is passed to reception amplifier 5 by capacitor C 2 and is amplified.

Claims

1, ultrasound wave water-oil interface detector comprises three way type probe, display screen (1), computing machine (2), single-chip microcomputer main body (3), radiating circuit (4 ₁), (4 ₂), (4 ₃), amplifying circuit (5 ₁), (5 ₂), (5 ₃), Zero crossing level testing circuit (6 ₁), (6 ₂), (6 ₃) or door (7), timing door (8), high frequency crystal oscillator markers (9), it is characterized in that probe surveys pipe (17) by two levels and manage (18) with vertical survey and connect to form transmission piezoelectric wafer (15), reception piezoelectric chip (15 ₁) one side be attached on the corrosion resistant plate (16), another side directly with the cable welding, cable is drawn and radiating circuit (4 by the wire hole (12) on the cover plate (13) ₁), (4 ₂), (4 ₃), reception amplifier (5 ₁), (5 ₂), (5 ₃) the circuit connection, corrosion resistant plate (16) is pushed down by cover plate (13), and tightens the difference sealing and fixing with screw (14) and manage on (19) two ends with vertical survey at level survey pipe (18).

2, water-oil interface detector according to claim 1 is characterized in that transceiver circuit is made of emission monostable (20), triode G1, resistance R 1, capacitor C 1, C2, amplifier (5).