The UDS2-77 ultrasonic single rail flaw detector is a handpush cart intended for the inspection of one rail line. The product is manufactured in nine modifications and can employ either Slide Search Unit or Roller Search Unit, and contain from 3 to 13 UT probes.
The flaw detector utilizes a unique scanning scheme that allows testing the entire rail section, except for foot flanges, by pulse echo, echo-shadow and echo-image techniques.
Both mechanics (the cart) and electronics (the software) of the UDS2-77 are ergonomically designed, have a user-friendly intuitive interface, as well as they are resistant to severe weather conditions that may occur during operation on a railroad.
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.
The slide probe units comprise the following probes:
|Probe unit №1:||Probe unit №2:|
|0° probe — 4 MHz||4х58°х34° probe — 2.5 MHz|
|70° probe — 2.5 MHz (Forward)||70° probe — 2.5 MHz (Backward)|
|4х58°х34° probe — 2.5 MHz||2х45° probe — 2.5 MHz (Forward/Backward)|
1. One 4 MHz probe, 00 refracted angle is intended for inspection of the entire rail section by height in the web projection, for the presence of internal defects and laminations. This probe enables two testing techniques: pulse echo and echo-shadow.
2. 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 presence of mature transverse defects.
3. 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 presence of internal defects, as well as for inspection of bolt holes for the presence of star-type defects.
4. Eight 2.5 MHz probes, 580 refracted angle that are turned by 34° 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.
The suspension mechanism is responsible for positioning the slide probe unit in the rail head cross-section. It also ensures a steady acoustic coupling when the cart is turned by ±15°.
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 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.
|Software description||The UDS2-77 features a simple menu structure for setup and calibration, as well as setting of software functions/modes. The device is furnished with the Hot Keys panel to get an immediate access to main operation modes, such as display (А-scan/B-scan), correction of track coordinate, generation of test report, On/Off button for test result saving mode.|