Abstract:
Disclosed are a railway vehicle braking system and method. The railway vehicle braking system includes a braking command generating unit generating a braking command to stop a railway vehicle, a comparison unit determining whether the braking command has been changed, a delay unit delaying and outputting the braking command depending upon a determination result from the comparison unit, and a digital-to-analog converter converting the braking command, which has been delayed by the delay unit, into an analog signal and inputting the analog signal to an actuator.
Abstract:
A cartridge for tunnel blasting is provided a cartridge for tunnel blasting, which easily breaks a rock, by inserting a cartridge containing water into a bore hole formed in a rock by using a boring device, and injecting liquid nitrogen into the inserted cartridge, so as to induce cracks of the rock by using the characteristic of the water that expands when it is frozen.
Abstract:
An apparatus for detecting a position of a train, the apparatus includes a reader. The reader electrically irradiates beams along a plurality of directions toward a tag, combines signals received from the tag and obtains a beam direction information toward the tag, and then detects the position of the train using the beam direction information and a tag information of the tag.
Abstract:
Provided is a high heat resistant brake disk for a railroad vehicle, which is manufactured using a nano material having high heat conductivity, such as a carbon nanotube (CNT) or graphene, to improve heat resistance of an overheated portion of the brake disk, and which can extend a life of the brake disk by suppressing performance deterioration due to a thermal shock. The high heat resistant brake disk includes a hub inserted into an axle of the railroad vehicle and an outer circumference coupled to a vehicle wheel to coaxially rotate with the vehicle wheel, wherein at least one pattern unit made from a high heat resistant nano material is formed on one surface of the brake disk.
Abstract:
The present invention relates to a sealing type screen door device, wherein a screen door is provided so as to be encompassed by a door of a train entering a station building, and an adsorption means is provided at the screen door so as to allow the screen door to be completely sealed and fixed to the body of the train, thereby completely blocking a change in air pressure (pressure wave) generated by the entering of the train so as to prevent the inflow of pressure waves into the station building. According to the present invention, the screen door device comprises: a sliding unit provided at a screen so as to cover a screen door; and an adsorption unit provided at the sliding unit so as to be adsorbed on an outer surface of a train.
Abstract:
The present invention pertains to a tunnel excavation device, which includes an excavation head, a main body on which the excavation head is rotatably mounted, a motor provided in the main body and rotates the excavation head, and a controller for controlling the motor, wherein the excavation head includes a perforating means formed by maintaining a predetermined interval from the center of a body part, which has a front surface formed in the shape of a circular plate, to the outer surface of the body part, an injection means for injecting water and liquid nitrogen into the hole formed by the perforating means, and a plurality of cutters provided on the surface of the main body for crushing the bedrock. According to the present invention, the perforating means such as a laser drill or the like forms a hole and water and liquid nitrogen are injected into the hole so as to crush the bedrock when the excavation work is carried out. Therefore, vibrations, noise and the dust may be reduced around the work site, and the progress speed of processes may be increased. In particular, the one day excavation distance becomes longer than the conventional TBM (tunnel boring machine) such that the entire tunnel construction period is reduced. Furthermore, the lifespan is elongated due to prevention of the abrasion of a cutter such that the cutter replacement time becomes longer, and the maintenance costs can be reduced.
Abstract:
Provided is a tube railway system that reduces noise and air resistance using a sealed evacuated tube as a passage for a tube railway, thereby allowing a train to run at a higher speed. A vacuum division management system and a vacuum blocking screen device for a tube railway system required to maintain vacuum are provided, in which the vacuum blocking screen device is operated to rapidly block a passage for a tube railway in response to an operation signal, is installed at every certain section or at a designated section of the tube railway, and is operated in a specific section when a vacuum maintenance problem occurs, or when the vacuum needs to be released, or when the train needs to stop immediately, thereby allowing the specific section to be isolated from other sections to have a degree of vacuum different from those of the other sections.
Abstract:
A droplet-blocking air conditioning system inside a train compartment according to an exemplary embodiment may include an air conditioning system unit for regulating the temperature and humidity of the air inside the train compartment; an air supply regulation unit which uses downdraft air to supply the compartment with the air that has had the temperature and humidity regulated by the air conditioning system unit, thereby causing the droplets remaining in the compartment to flow below the compartment due to the downdraft air; mechanical and electronic motors which control a degree of rotation of the air adjustment member according to the degree of rotation of a rotary shaft inside the air supply regulation unit; and an air discharge unit for discharging the droplets and the downdraft air to the outside of the compartment.
Abstract:
A method and an apparatus for timing measurement based positioning to minimize the number of scans is provided. The positioning method for a terminal includes estimating a temporary location of the terminal; analyzing characteristics of obstacles between the temporary location of the terminal and peripheral access points (APs) based on a pre-stored map on which the peripheral APs and the obstacles are indicated; calculating distances between the temporary location of the terminal and the peripheral APs based on the map; selecting at least three peripheral APs from among the peripheral APs according to at least one of the distances or the obstacle characteristics; generating timing measurement data with the at least three peripheral APs using identification information of the at least three peripheral APs; and estimating a current location of the terminal using the timing measurement data.
Abstract:
A waste wood sleeper pyrolysis apparatus of a hybrid heating type includes a plurality of reactor containers arranged side by side, each having a space in which a waste wood sleeper is placed, a movement rail arranged parallel to an end of one side and an end of the other side of each of the plurality of reactor containers, and a microwave applicator coupled to the movement rail and including a plurality of microwave generators that move to upper portions of the plurality of reactor containers to transmit microwaves into the plurality of reactor containers.