RU2315335C1 - Acoustic range finding method - Google Patents

Abstract

FIELD: acoustic ranging finding and acoustic control, possible use for measuring distances to objects which move through internal pipe spaces without violating integrity of a pipeline.

SUBSTANCE: method includes sending a probing signal by first receiving-emitting sensor, receiving that signal by second receiving-emitting sensor, positioned on moving in-pipe device, dispatching of response signal from it, receipt of response signal by first receiving-emitting sensor and detection of distance between two receiving-emitting sensors by measuring time of bidirectional passage of probing signal and response signal. Injection of probing ultrasound signal and receipt of response signal is performed outside the pipe.

EFFECT: increased efficiency.

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Description

The invention relates to the field of sound ranging and acoustic control and can be used to measure distances to objects that change the direction of the reflected signal or have a small reflective surface.

A known method of measuring the distance between two points by the method of unidirectional measurement (Gorbatov A.A., Rudashevsky G.E. Acoustic methods for measuring distances and control. - M .: Energoizdat, 1981. - P.7-9), containing the supply of an ultrasonic signal from an emitter of an ultrasonic signal installed at one point, receiving an ultrasonic signal by a receiver installed at another point, and measuring the distance between two points by the time the ultrasonic signal travels from one point to another.

A known method of measuring the distance between two points by the method of "echolocation" (Gorbatov A.A., Radashevsky G.E. Acoustic methods for measuring distances and control. - M .: Energoizdat, 1981. - S. 7-9), containing ultrasonic a signal from a receiving-emitting acoustic unit installed at one point, receiving a reflected ultrasonic signal from an object located at another point, and measuring the distance between two points along the travel time of the emitted and reflected ultrasound signal.

A known method for determining the location of an in-tube projectile (JP patent No. 6323837), selected as a prototype, comprising supplying an ultrasonic signal with a receiving-emitting sensor installed inside the pipe in a fixed place, receiving this signal with a receiving-emitting sensor located on the in-tube device, supplying a response signal , its reception and measurement of the distance between two receiving-emitting sensors by the time of bidirectional propagation of the emitted and response ultrasonic signal.

Known methods cannot be applied to measure distances to objects moving in the pipe spaces without violating the integrity of the pipeline.

The disadvantages of the known methods are limited functionality.

The invention solves the problem of creating a method of sound ranging, allowing the measurement of distances to objects moving in the pipe spaces without violating the integrity of the pipeline.

The problem is solved due to the fact that in the method of acoustic ranging, as well as in the prototype, which includes the supply of a probing ultrasonic signal by a first receiving-emitting sensor, the reception of this signal by a second receiving-emitting sensor located on a movable in-tube device, the supply of a response signal from it , receiving a response signal and determining the distance between two receiving-emitting sensors by the time of bidirectional passage of the probing and response ultrasonic signals.

According to the invention, a probing ultrasonic signal is supplied and a response signal is received from the outside of the pipe.

By supplying a sounding ultrasonic signal and receiving a response signal from the outside of the pipe, it is possible to determine the distance to an object moving in the pipe interior without violating the integrity of the pipeline.

Presented is a drawing illustrating the proposed method.

The table shows the results of measuring the distance from the in-tube object to the receiving-emitting sensor located outside the pipe.

An acoustic ranging device that implements the proposed method (see the drawing) comprises an acoustic range finder 1 with a receiving-emitting sensor mounted on the outside of the pipe 2, and an active response generating device 3 with its receiving-emitting sensor installed on the object 4 moving in in-tube space.

The performance of the acoustic rangefinder 1 and the device for generating an active response 3 are standard.

An acoustic range finder 1 with a receiving-emitting sensor delivers a sounding ultrasonic signal to the in-tube object 4, moved inside the pipe 2, and receiving a response ultrasonic signal from the active response generating device 3 located on the in-tube object 4.

The device for generating an active response 3 provides the reception of a probe ultrasonic signal from the acoustic range finder 1 and the supply of a response signal to the side of the acoustic range finder 1.

The acoustic range finder 1 determines the distance from the location of the range finder 1 to the object located inside the tube, by the time of the bi-directional passage of the ultrasonic signal to the object and vice versa.

Tests of the acoustic ranging method were carried out at a laboratory bench. The length of the pipe was 4.2 meters; the diameter of the pipe was 0.3 meters. The pipe was installed vertically and was filled with water. The device for generating an active response was placed on a simulator of an in-tube object. The simulator was made in the form of a cylinder with a diameter of 0.28 meters and a length of 0.3 meters. Movement of the simulator inside the pipe was carried out using a rope on which the markings were applied in increments of 0.05 meters. A block was installed at the upper end of the pipe, which allows the rope simulator to raise and lower the in-pipe object simulator.

The results of bench tests of the acoustic ranging method, given in the table, prove the possibility of measuring distance by this method and allow to obtain high measurement accuracy. The error of distance measurement does not exceed 0.05 meters in the range from 0.5 to 3.9 meters.

Claims (1)

An acoustic ranging method, including supplying a sounding signal by a first receiving-emitting sensor, receiving this signal by a second receiving-emitting sensor located on a movable in-tube device, supplying a response signal therefrom, receiving a response signal by a first receiving-emitting sensor, and determining a distance between two receiving-emitting sensors by measuring the time of bi-directional passage of the sounding signal and response signal, characterized in that the supply of a probing ultrasonic signal la and the reception of a response signal is produced from the outside of the pipe.