CN2166444Y

CN2166444Y - Liquid & solid two phase ultrasonic concentration meter

Info

Publication number: CN2166444Y
Application number: CN93216203U
Authority: CN
Inventors: 刘玉英; 刘增厚
Original assignee: Shanxi Institute of Coal Chemistry of CAS
Current assignee: Shanxi Institute of Coal Chemistry of CAS
Priority date: 1993-06-15
Filing date: 1993-06-15
Publication date: 1994-05-25
Anticipated expiration: 2003-06-15

Abstract

The utility model provides a liquid & solid two phase supersonic concentration meter which comprises a transmitting and receiving transducer and a transmitting and receiving circuit, wherein, the transmitting circuit adopts the supersonic generator of complex frequency waves; the receiving circuit adopts a wideband high-frequency amplifier to process input and output data by the processing circuit of a connected monolithic computer. The transmitting and receiving transducer for measuring pipelines comprises a probe head, a probe head box connected by a source nipple and the probe head, and a waist pipe connected with the probe head box. The concentration meter adopts a complex frequency wave circuit with the low Q value of a measuring head and wide frequency band, and thus a grain diameter has less influence on a measuring result. The utility model can be widely used for various measurements of solid phase concentration in suspension load, and both dynamic measurements and static measurements are available.

Description

Liquid & solid two phase ultrasonic concentration meter

The utility model belongs to the concentration determination instrument of measuring solids content in the liquid-solid two-phase body with ultrasonic technique.

The instrument of measuring solid concentration in the liquid-solid two-phase body with ultrasonic technique is existing many.The applicant provides a kind of analyzer of measuring sediment concentration in the river that is exclusively used in " ultrasound wave river load concentration determination instrument " (patent No. 87211075) of application in 87 years, this analyzer adopts modulating pulse wave to come the stimulated emission transducer, obtained matching effect and bigger electroacoustic conversion effect preferably, measuring accuracy is higher.This analyzer is owing to only selected single pulsating wave for use, so can only measure the very little river load of change of size scope, the not solid concentration of other liquid-solid two-phase body that the energy measurement change of size is bigger, and measurement transducer can only be used for the river can not be used for pipeline.

The purpose of this utility model provides a kind ofly can measure the ultrasonic concentration meter of solid concentration in the liquid-solid two-phase body in the bigger scope of change of size, and is provided for the transducer of duct survey.

Ultrasound wave concentration meter of the present utility model comprises and transmits and receives transducer and transmit and receive circuit, it is characterized in that said radiating circuit adopts multiple ripple ultrasonic generator frequently, adopted wide band radio-frequency amplifier in the receiving circuit, the single-chip microcomputer treatment circuit that the data of input and output are passed through to be connected has been handled.

What be used for duct survey transmits and receives transducer by popping one's head in, forming with pop one's head in probe cassette that is connected and the waist pipe that connects probe cassette with hickey.

The circuit work frequency of ultrasound wave concentration meter of the present utility model is the 100K-5M hertz.

Ultrasound wave concentration meter of the present utility model adopts multiple wave circuit frequently, and measuring head Q value is low, bandwidth, thereby measurement result is subjected to grain diameter influence less.Mean grain size husky in the river is in the 0.021mm-0.146mm scope, and the coal particle diameter does not have influence substantially to measuring in the coal slurry in 80-200 purpose scope.This concentration meter adopts single-chip microcomputer that data are handled, have rapidly, accurately, advantage easily, can be widely used in the measurement of solid concentration in the various suspended loads, but the both concentration of slurry in the measuring channel, also can survey the solid-liquid two-phase mixture concentration in river, the basin, but both kinetic measurements, but also static measurement.

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

Fig. 1 is for being used for the transducer architecture synoptic diagram of duct survey according to the ultrasonic concentration meter of liquid-solid two-phase body that the utility model proposes.

Fig. 2 is the radiating circuit schematic diagram.

Fig. 3 is the receiving circuit schematic diagram.

Fig. 4 is a single-chip data treatment circuit schematic diagram.

What be used for duct survey transmits and receives transducing as shown in Figure 1, and it is identical to transmit and receive transducer architecture, symmetric arrangement.The main parts of transducer are bonded in the front portion of probe 7 for probe 7, piezoelectric chip, and probe is put into probe cassette 2 and is connected with the hickey 1 of probe, after compressing with gland 3, probe cassette is welded on the waist pipe 4.5,6 all is packing rings.

Radiating circuit shown in Figure 2 adopts the multiple ripple frequently of CM1812 ultrasonic generator emission, drive transmitting transducer by power amplifier and produce ultrasound wave, the medium of this ultrasonic signal between emission and receiving transducer decayed, and the signal after decay is received by receiving transducer.According to the needs of actual measurement medium, the frequency of operation of oscillatory circuit can be regulated in the scope of 100K-5M hertz.

Receiving circuit shown in Figure 3 comprises match circuit, amplifying circuit, detecting circuit three parts, and amplifying circuit adopts wide band MPC1018 radio-frequency amplifier that the ultrasonic signal that receives is amplified.Match circuit and detecting circuit all can adopt universal circuit.

Single-chip data treatment circuit shown in Figure 4 adopts two 8031CPU, MC14433 is as the A/D change-over circuit, the SCM peripheral circuit is furnished with a 2764EPROM as external program memory, a slice 6264 is made external data memory, a slice 74LS373 makes the Z/O interface as address latch and 8255A, circuit is connected with screen display, LED demonstration and printer and input keyboard.Ultrasound wave amplifying signal in the receiving circuit is finished functions such as linearizing digital concentration demonstration, printing by above-mentioned single chip circuit.Described single chip circuit all can be selected universal circuit for use.

This instrument has the output signal of 4-20mA.

But the concentration of solid in the liquid-solid two-phase body in concentration meter measuring channel of the present utility model, basin and the river.The transducer of measuring channel as shown in Figure 1, the sealing of this transducer can be carried out with reference to Chinese patent 87211075.With the coal oil mixture concentration of the utility model measurement Zhejiang University and Anshan iron and steel plant generating plant, measure concentration range 0-52%, measuring error ± 1.5%.Measure Beijing Printing and Dyeing Mill's water coal slurry concentration, measure concentration range 0-70%, measuring error ± 1.0%.Measure the black water concentration of coal preparation plant, measure concentration range 0-420g/L, measuring error ± 2%.Measure the river silt content at hydrometric station, the Yellow River council Wubao, when to measure the silt content scope be 0.5-5 kilogram/cubic meter, relative error was ± 10%, and when measurement silt content scope was 5-500 kilogram/cubic meter, relative error was ± 5%.From above-mentioned example as seen, the utility model measuring accuracy height, and be not subjected to the influence of flow velocity, temperature, pressure.

Claims

1, the ultrasonic concentration meter of a kind of liquid-solid two-phase body, comprise and transmit and receive transducer and transmit and receive circuit, it is characterized in that said radiating circuit adopts multiple ripple ultrasonic generator frequently, adopted wide band radio-frequency amplifier in the receiving circuit, the single-chip microcomputer treatment circuit that the data of input and output are passed through to be connected has been handled.

2, concentration meter as claimed in claim 1 is characterized in that the described transducer that transmits and receives is by probe 7, form with the waist pipe 4 of pop one's head in 7 probe cassettes that are connected 2 and connection probe cassette 2 with hickey.

3, as claim 1 and 2 described concentration meters, the frequency of operation that it is characterized in that circuit is the 100K-5M hertz.