SU974256A1 - Device for ultrasonic inspection - Google Patents

Description

(5) DEVICE FOR ULTRASONIC CONTROL

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This invention relates to non-destructive testing and can be used to control the quality of adhesive joints.

A device for ultrasonic control is known that contains a rod and piezoelements-SPs placed in it. The disadvantage of this device is the low sensitivity due to the design features of the rod and the attachment of piezoelectric elements.

The closest in technical essence to the present invention is a device for ultrasonic testing, comprising a housing, a frame movably mounted relative to it, a sound-conducting rod displaced on it and a pieto-transducer 2 acoustically connected with it.

A disadvantage of this device is its low sensitivity, due to the design features of the frame and the sound-conducting rod.

The goal of this is to increase sensitivity.

The goal is achieved by the fact that the device for ultrasonic testing is supplied with a frame-connected electromagnet with a movable core, connected with a sound-conducting rod, and with two membranes, installed 0 nm on either side of the piezoelectric transducer.

The drawing shows a schematic diagram of the device for ultrasonic testing.

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Claims (2)

The device for ultrasonic testing includes a housing 1, a frame 2 which is movably mounted relative to it, a sound-conducting rod 3 placed on it, an piezotransducer k acoustically connected with it, an electromagnet S with a moving core 6 and two membranes 7 and 8 connected to the frame 2. , the device for ultrasonic testing is equipped with a locking screw 9, a table 10 electrically connected by a driver pulse generator 11, a power amplifier 12, a pre-amplifier 13, a main amplifier .k, a filter unit 15 ditch, block 16 of the registration of acoustic signals and block 17 synchronization. Position 18 marked, controlled product. The device for ultrasonic testing works as follows. The controlled article 18 is installed on the table 10, the frame 2 is moved relative to the housing 1 until the conductive rod 3 is in contact with the controlled product. The frame 2 is fixed by a locking screw 9. At the command of the synchronization unit 17, the driver pulse excitation generator 11 generates an electrical pulse, which is amplified by the amplifier 12 power and excites the electromagnet 5. The movable core 6 presses on the sound-conducting rod 3, which sags on the membranes 7 and 8 When. Removal of the load in the controlled product 18 results in acoustic signals that are transmitted to the piezoelectric transducer k through the sound-conducting rod 3, amplified by the preamplifier 13, the main amplifier C and through the filter unit 15 in the form of electrical signals to the acoustic signal recording unit 16. The synchronization unit 17 connects the acoustic signal acquisition unit 16 for the time required to receive the acoustic signals. Thus, the use of an electromagnet and membranes allows for increased sensitivity. Apparatus of the Invention The device for ultrasonic testing, comprising a housing, a frame movably mounted relative to it, a sound-conducting rod displaced thereon and a piezotransducer acoustically connected with it, characterized in that, for the purpose of increasing sensitivity, it is provided with an electromechanical frame connected to it. A moving core connected to the Beacon core and two membranes installed on either side of the piezo transducer. Sources of information taken into account during the examination 1. Defectoscopy, 197, No. 2, p. 36-107. 2. USSR author's certificate M, cl. G 01 N 29/0, 197.