產品介紹∣UDS2-77 Ultrasonic Single Rail Flaw Detector

概述

The UDS2-77 ultrasonic single rail flaw detector is intended for continuous inspection of a rail in track and manual verification of indications caused by rail defects. This rail inspection equipment is manufactured in 9 modifications and can use either Slide or Roller Search Unit with 3 to 13 UT channels (probes). Bulk mode testing is done at a speed of 4 km/h. The unique scanning scheme, employing pulse echo, echo-shadow, and echo-image techniques, enables inspection of the whole rail, excluding its base blades.
		Easy-to-Use The UDS2-77 is easy to use due to its intuitive interface. The ‘Hot Keys’ panel gives quick access to all the main settings and functions of the detector.
Lightweight, Ergonomic, and Reliable The UDS2-77 consists of a support frame with adjustable rollers; an electronic unit for control and visualization; a multichannel unit (MUX); a storage battery; a couplant tank; 13 probe units for continuous inspection and 2 probe units for hand testing; a suspension mechanism to place the probe units into an operation or transportation position; an encoder. All the modules can be easily assembled and disassembled. The weight of the flaw detector without a storage battery and a couplant tank is no more than 16 kg. The electronic unit is 3-axis adjustable. The rollers are adjusted for the size of the rail. The suspension mechanism guarantees the stability of acoustic coupling of the slide probe unit, even if the frame is tilted at ±15°. The flaw detector performs excellently under difficult field conditions common for rail inspection.
		Probe units can be of two types The UDS2-77 flaw detector employs contact probe units of conventional type with both standard and specialized probes. The probe units are made from wear resistant plastic material, with hard-metal inserts on the working surface.
Slide probe unit	Roller search unit (with immersion probes) of handpush cart for ultrasonic rail inspection.

The slide probe units comprise the following probes:

Probe unit №1
0° probe	4 MHz
70° probe	2.5 MHz (Forward)
4х58°х34° probe	2.5 MHz
Probe unit №2
4х58°х34° probe	2.5 MHz
70° probe	2.5 MHz (Backward)
2х45° probe	2.5 MHz (Forward/Backward)

One 4 MHz probe, 0⁰ refracted angle is intended for inspection of the entire rail section by height in the web projection, for the detection of internal defects and laminations. This probe enables two testing techniques: pulse echo and echo-shadow.
Two 2.5 MHz probes, 70⁰ refracted angle of (one of them emits along, and another — across the trolley movement) are intended for inspection of the central part of the rail head, for the detection of mature transverse defects.
Two 2.5 MHz probes, 45⁰refracted angle (one of them emits along, and another — across the trolley movement) are intended for inspection of the entire rail section in the web projection, for the detection of internal defects, as well as for inspection of bolt holes for the detection of star-type defects.
Eight 2.5 MHz probes, 58⁰ refracted angle that are turned by 340 in relation to the rail axis. The probes are placed in two cases, with 4 piezoelectric-crystal plates each. These probes enable pulse echo and echo-image techniques and are intended for flaw detection across the entire rail head.

Suspension mechanism of the Slide Search Unit Suspension mechanism is responsible for positioning the probe unit (slide) in the rail head cross section. It also ensures a steady acoustic contact when the cart is turned by ±15°.

Fig. 3 — Suspension mechanism. Working position (lever down)	Fig. 4 — Suspension mechanism. Transport position (lever up)	Fig. 5 — Adaptive wheels

Electronic unit of UDS2-77
1 — Control Knob to change operation modes and parameter values in the software interface;

2 — Connector for headphones;

3 — Connector for USB-drive;

4 — Connector for Encoder;

5 — Connector for Multichannel (MUX).

Keypad
Keypad of UDS2-77 flaw detector consists of two navigation panels that are used for browsing through the menu items, modifying the parameter values, and calling for various operation modes with the aid of ‘hot’ keys.