WMS WORKSTATION

User access to the WMS is via a database on a server. The equipment that loads the data into the database is discussed in the System Administration Guide.

A WCM Workstation is any WCM database that is opened directly by the user and not by the WCM program. This is typically one of the archives defined by the system manager.

The WCM Workstation starts the database in the selected user name's mode and presents the user with the view defined for that user name. This user mode may restrict the view to certain train types or vehicle owners depending upon the settings made by the system manager for that user account. All activity is read-only and the user can lookup and print any information in the system but cannot change data in any way.

The WCM Workstation will maintain updated displays to show new trains and vehicles as they enter the database but no programs run and no email or other automated events originate from the workstation.

Workstation access is normally via the LAN and the databases accessed in this manner should be on a SERVER. There are no files or directories that need to be installed on the workstation and the database is opened by executing the database MDE file on the server.


Train View
When you log into a FULL archive then the Train View is displayed by default. This "Train List" form is discussed in more detail later. The purpose here is to explain the two different views in the database.

Vehicle View
When you log into a VEHICLE archive the vehicle view form is automatically displayed as shown below. This form is discussed in more detail later. The purpose here is to explain the two different views in the database.
From this view you can review tagged vehicles and their running histories. You cannot expand to see the trains that the vehicles were in at the time.


Consist Speed
Train speed over the array is supposed to be reasonably consistent. If the speed of a train changes as it goes over the array there can be consist dynamics that set up significant (and transient) coupling induced forces in the track. These can appear as extreme wheel impacts. This problem is most noticeable when the train starts braking while over the array or it changes from a static/stable or decelerating state to acceleration or from accelerating to a stable speed.

The WCM analyzes consist speeds and it there are significant speed changes from one wheel to the next it invalidates all impact readings 4 axles either side of the event and logs an event advising that some wheels have not been successfully checked.

The plot to the left shows a minerals type of consist of over 400 axles accelerating through the array. The consist transitions into extension as the train speed increases but acceleration stops in the last 50 axles. There is a significant coupling event at the end of the train as the speed tapers of but the last vehicles slam forward into the main body of the train. These are highlighted in red on the graph and with an "H" on the "View Consist Detail" form.

Wheel-sets marked with an "H" have not been successfully checked for wheel condition because the train has traversed the site incorrectly. There is a risk that significant transient vertical forces caused by consist dynamics will cause erroneous readings and false alarms and so the wheels are ignored.

The graph on the left shows a train slowing down over the array and then speeding up. As you can see by all the red sections, the WCM has not analyzed much of the train because of the risks of false alarms from consist dynamics and coupling effects. The small "wiggle" at the front is caused by the dynamic braking in the 3 lead locomotives in this example.

An example of the type of consist speed variation that causes an alarm. In the example below the train sped up and slowed down over the array. It was over 900 axles long. The green areas are places where coupling dynamics were found and the zone at the end is where some serious forces were at work considering the mass per axle was in excess of 38 tonne. The green area around axle 460 is just behind the two centre locomotives.



Consist Load
If there is a weighbridge option installed then this function graphically shows the consist loading pattern.

The red dots show the wheelset weights. The example below shows why this is important. There is an empty vehicle in the front of the consist and an overloaded one at the rear. If the alarm settings are configured, this train would have alerted to two loading violations.







Other Examples

Non speed dependent Apparent shell/spall Good repeatability, even at very low speeds Typical degradation rate (8 week window) Adjacent wheel (3) clean but axle 2 developed similar fault
Last 60 Passes