AU2016399957B2

AU2016399957B2 - A system to detect human intrusion

Info

Publication number: AU2016399957B2
Application number: AU2016399957A
Authority: AU
Inventors: William Thyang Heng FOO; Ming Guan LIM
Original assignee: Azti Tech Sdn Bhd
Current assignee: Azti Technology Sdn Bhd
Priority date: 2016-03-31
Filing date: 2016-07-25
Publication date: 2021-12-02
Anticipated expiration: 2036-07-25
Also published as: SG11201802866YA; PH12018501108A1; AU2016399957A1; CN209607102U; WO2017171539A1; MY180241A

Abstract

The present invention relates to an apparatus comprising a vibration pick up means for detecting vibration signal and transmitted to a signal analyzing means (8), via the extension of coaxial cable, wherein the vibration pick up means includes a contact plate (3) and a sensor cable (4), characterized in that the contact plate (3) placed over a coil spring (11) in a row having the sensor cable (4) fitted throughout length of the row to dampened the vibration signal that triggers an alert signal when an intruder object having weight greater than a predefined weight is detected, in which the predefined weight is defined by adjusting damping coefficient of the spring (11).

Description

A SYSTEM TO DETECT HUMAN INTRUSION

FIELD OF INVENTION This invention relates to apparatus and system for detecting intrusion of a human in an off-limits area, such as railway tracks. In particular, to differentiate and eliminate the possible frequency signal generated from a non-human object which is typically lighter that human being and may trigger the fault alarm. BACKGROUND ART

Automatic emergency stop systems have the potential to be more reliable and to have a better response time than manual systems employing an operator situated at the machinery. Moreover, automatic emergency stop systems are essential in the case of fully automated driver-less machinery, such as those used in some light rapid-transit systems.

However, known automated emergency stop systems have not proved to be effective. For example, existing level crossing systems, utilizing floating boards resting on an array of micro-switches which trigger depending upon the weight incident thereon, are very costly to maintain and prone to false alarms such as those caused by a gradual build up of snow.

Other systems, relying upon light beams or microwaves, have been proposed for use as emergency stop systems for driver-less trains, but these systems in many cases must be turned off as the train approaches the station, or while the train is in the station, to prevent false alarms caused by the train itself and passengers entering and exiting the train. As a result, such light beam or microwave systems tend to be ineffective in preventing accidental deaths resulting, for example, from visually-impaired passengers mistaking the gaps between adjacent passenger cars for the open car doors. Prior art systems also tend to be relatively ineffective at distinguishing between intrusions caused by human beings and other objects.

Some present application uses noisy cable is mounted on top of the plate of a railway track, which the cable exposed causing it to be easily interfere with other mechanical system and get damaged or broken. Further, the noisy cable is a sensitive cable which may pick up error signal in between the platform and the equipment room. Therefore there is a need for a system to reduce the faulty alarm that triggered by a non-human object which is typically causes delay of the operations of a machinery or train.

Summary of invention

One aspect of the present invention relates to an apparatus comprising a vibration pick up means for detecting vibration signal and transmitted to a signal analyzing means, via the extension of coaxial cable, wherein the vibration pick up means includes a contact plate and a sensor cable, characterized in that the contact plate placed over a coil spring in a row having the sensor cable fitted throughout length of the row to dampened the vibration signal that triggers an alert signal when an intruder object having weight greater than a predefined weight is detected, in which the predefined weight is defined by adjusting damping coefficient of the spring.

Preferably, the contact plate includes at least one groove to accommodate the sensor cable.

Further, the apparatus includes at least one filler for securing the sensor cable onto the contact plate.

Preferably, the vibration signal is detected and transmitted to a signal analyzing means, via the extension of coaxial cable.

Preferably, the coil spring is mounted on a supporting structure, in which the contact plates placed over the supporting structure, having the coil spring. Preferably, the contact plates are independently mounted on the supporting structure, and the coil spring, so as to move independently of each other.

Preferably, the contact plates are constructed from a thin, rectangular plate such as fiberglass reinforced plastic. Preferably, the contact plates are mounted on the supporting structure.

Preferably, the supporting structure, having a bottom bracket and a top bracket, wherein the bottom bracket includes a long hole allows a leveling height adjustment of the supporting structure by locking positions.

Preferably, the damping coefficient of the spring set to meet the critical damped and overdamped when the intruder object weight is lower than the set minimum weight.

Preferably, the apparatus set up in a train station.

Further, the apparatus comprising a sensor platform control panel, a cable, an end of line resistor and a BNC (Bayonet Neill-Concelman) coaxial cable joint typically installed in the train platform area; and a coaxial extension cable, which is are an extension from the sensor cable to the signal analyzing means and/or the signal analyzing means to platform control panel.

Further, the apparatus includes another row placed between a passenger platform and a railway track having the sensor cable fitted throughout length of the row such that the dampened vibration signal triggers the alert signal when the intruder object weight is higher than a predetermined minimum weight detected.

Preferably, the signal analyzing means send a relay signal to a train operator using a supervisory control and data acquisition (SCADA) and Automatic Train Control System (ATC) to carry out an action to stop at least one emerging train to a particular platform area having the apparatus. Preferably, the signal analyzing means sends a signal to a platform control panel, via a coaxial cable to activate or trigger at least one alarm system fitted into the apparatus. Preferably, the alert signal is fed into an alarm generating means to produce an appropriate signal for driving relays which interface with SCADA, Automatic Train Control System or any other external system.

Another aspect of the present invention relates to a system for detecting vibration signal and transmitted to a signal analyzing means, by a vibration pick up means, wherein the vibration pick up means comprising a contact plate and a sensor cable, characterized in that the contact plate placed over a coil spring in a row having the sensor cable fitted throughout length of the row to dampened the vibration signal that triggers an alert signal when an intruder object having weight greater than a predefined weight is detected, in which the predefined weight is defined by adjusting damping coefficient of the spring.

Another aspect of the present invention relates to a method for detecting vibration signal and transmitted to a signal analyzing means, by a vibration pick up means, comprising steps of: adjusting damping coefficient of the spring to define a predefined weight; and placing over a coil spring in a row having a sensor cable fitted throughout length of the row to dampened the vibration signal that triggers an alert signal when an intruder object having weight greater than a predefined weight is detected, wherein the vibration pick up means comprising a contact plate and a sensor cable.

The present invention consists of features and a combination of parts hereinafter fully described and illustrated in the accompanying drawings, it being understood that various changes in the details may be made without departing from the scope of the invention or sacrificing any of the advantages of the present invention.

BRIEF DESCRIPTION OF PREFERRED EMBODIMENT

To further clarify various aspects of some embodiments of the present invention, a more particular description of the invention will be rendered by references to specific embodiments thereof, which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the accompanying drawings in which:

Figure 1 illustrates one embodiment of an intrusion detection apparatus set up in a train station with side platform.

Figure 2 illustrates another embodiment of an intrusion detection apparatus set up in a train station with a center platform.

Figure 3 illustrates one embodiment of a cross section view of an intrusion detection apparatus set up in a train station. Figure 4 illustrates one embodiment of an overall electrical diagram for the intrusion detection apparatus.

Figure 5 illustrates a BNC (Bayonet Neill-Concelman) coaxial cable joint. Figure 6 illustrates a cross section view of contact plates.

Figure 7 illustrates an isometric view of the assembly of sensor cable and rubber filler in the contact plate's groove. Figure 8 illustrates one embodiment of a coil spring. Figure 9 illustrates one embodiment of a side plate support 12.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Figure 1 illustrates one embodiment of an intrusion detection apparatus set up in a train station with side platform 1 , where the train station comprising of two tracks will be placed at the center and the platform will be placed on each opposing sides of the tracks. The intrusion detection apparatus include of contact plates 3 and sensor cable 4. The sensor cable 4 act as a vibration pick up means, where the vibration signal is picked up and transmitted to a signal analyzing means 8, via the extension of coaxial cable. Preferably, the coaxial cable is a RG59 type cable. The contact plates 3 are mounted on a steel structure 12,13. The steel structure 12,13 preferably placed over a coil spring 1 1 in a row, preferably row A and row B as shown in Figure 1 . The row A of contact plates 3 is situated between passenger platform 1 and running rail 2a. The row B of contact plates 3 is situated between running rail 2a and 2b. Preferably, the contact plates 3 are constructed from a thin, rectangular plate such as fiberglass reinforced plastic. The sensor cable 4 extends throughout the length of rows A and B, and preferably attached to each contact plate 3 of a particular row. The Sensor cable 4 attached, fitted or fastened to the contact plate 3 by using at least one filler 14, such as rubber filler. Each of contact plates 3 are independently mounted on steel structure 12, 13 and a coil spring 1 1 , so as to move independently of each other.

The operations of intrusion detection apparatus or system set up in a train station are explained below;

When intrusion signal is detected, the system or apparatus will verify and confirm by using a signal analyzing means 8, thereafter the signal analyzing means 8 will send a relay signal to a train operator, for example through the train operator using a supervisory control and data acquisition (SCADA) and Automatic Train Control System (ATC) to carry out an action to stop the emerging train to the particular platform area. The signal analyzing means 8 also able to send a signal to a platform control panel 10, via a coaxial cable for example RG59 cable to activate or trigger at least one alarm system fitted into the system, for example the buzzer and siren lighting to alert the platform operator to verify and handle the intrusion incident which has been alerted or identified.

Figure 2 illustrates another embodiment of an intrusion detection apparatus set up in a train station with a center platform 1 , where the train station comprising of one platform placed at the center and the two tracks will be placed on each opposing sides of the tracks. The intrusion detection apparatus include of contact plates 3 and sensor cable 4. The sensor cable 4 act as a vibration pick up means, where the vibration signal is picked up and transmitted to a signal analyzing means 8, via the extension of coaxial cable. Preferably, the coaxial cable is a RG59 type cable. The contact plates 3 are mounted on a steel structure 12,13. The steel structure 12,13 preferably placed over a coil spring 1 1 in a row, preferably row A and row B as shown in Figure 2. The row A of contact plates 3 is situated between passenger platform 1 and running rail 2a. Meanwhile, the row B of contact plates 3 is situated between running rail 2a and 2b. Preferably, the contact plates 3 are constructed from a thin, rectangular plate such as fiberglass reinforced plastic. The sensor cable 4 extends throughout the length of rows A and B, and preferably attached to each contact plate 3 of a particular row. The Sensor cable 4 attached, fitted or fastened to the contact plate 3 by using at least one filler 14, such as rubber filler. Each of contact plates 3 are independently mounted on steel structure 12, 13 and a coil spring 1 1 , so as to move independently of each other.

The operations of intrusion detection apparatus or system set up in a train station with a center platform are explained below;

When there is an identified intrusion signal detected, verified and confirmed by a signal analyzing means 8, the signal analyzing means 8 will send a relay signal to a train operator, for example through the train operator using a supervisory control and data acquisition (SCADA) and Automatic Train Control System (ATC) to carry out an action to stop the emerging train to the particular platform area. The signal analyzing means 8 will also send a signal to a platform control panel 10, via a coaxial cable for example RG59 to activate its alarm system, for example the buzzer and siren lighting to alert the platform operator to attend to verify and/or handle the intrusion incident.

Figure 3 illustrates one embodiment of a cross section view of an intrusion detection apparatus set up in a train station. The intrusion detection apparatus include of contact plates 3 and sensor cable 4 as a vibration pick up means. The vibration signal is pick up and transmit to a signal analyzing means 8, via the extension of coaxial cable for example RG59. The contact plates 3 is mounted on a steel structure 12,13 and coil spring 1 1 in Row A and Row B as shown in Figure 3. Row A of contact plates 3 is situated between passenger platform 1 and running rail 2a. Row B of contact plates 3 is situated between running rail 2a and 2b. The contact plates 3 are constructed from a thin, rectangular plate such as fiberglass reinforced plastic. Sensor cable 4 extend the length of rows A and B, and are attached to each contact plate 3 of a particular row by rubber filler 14. Each of contact plates 3 is independently mounted on steel structure 12, 13 and a coil spring 1 1 , so as to move independently of each other.

Figure 4 illustrates an overall electrical diagram for the intrusion detection apparatus in this invention comprises sensor platform control panel 10, cable 4, end of line resistor 5 and BNC coaxial cable joint 6 which is typically installed in the train platform area; coaxial cable 7 and coaxial cable 9 which is are an extension from a sensor cable to a signal analyzing means 8 and signal analyzing means 8 to platform control panel 10; and signal analyzing means which is typically installed in an equipment room. Figure 5 illustrates a BNC (Bayonet Neill-Concelman) coaxial cable joint 6 which uses to electrically connect both sensor cable 4 and coaxial cable 7.

Figure 6 illustrates a cross section view of contact plates 3 which indicating the assembly of contact plate 3 on the coil spring 1 1 , steel bracket 12 and steel bracket 13. The cross section diagram also indicating the assembly of sensor cable 4 and rubber filler 14 in the contact plate's grooves 3a and 3b.

Figure 7 illustrates an isometric view of the assembly of sensor cable 4 and rubber filler 14 in the contact plate's groove 3a.

Figure 8 illustrates one embodiment of a coil spring 1 1 , which is a supporting structure for the contact plates 3. The spring constants and Damping Coefficient^ of the coil spring is being carefully selected to set the minimum weight of object which will trigger the frequency signal to be generated and transferred to the sensor cable, with reference to the following formula :

Where as:

ζ = Damping Ratio

c = Damping Coefficient of the spring

k = Spring Constant

m = Mass

The value of the damping ratio ζ determines the behaviour of the system such that ζ=1 corresponds to being critically damped with larger values being overdamped and smaller values being underdamped. If ζ=0, the system is undamped. In typical scenario, the contact plates is required a minimum object weight of 7 kg to generate a significant frequency to be transferred to the sensor cable, to minimize the fault triggering caused by the non-human object. The spring constant and its damping coefficient will be set to meet the critical damped and overdamped when the intruder object weight is lower than the set minimum weight.

Figure 9 illustrates one embodiment of a side plate support 12 which comprises of the bottom bracket 12b and top bracket 12a. Top bracket 12a is a movable bracket to ease the installation of contact plate 3 on the supporting structure. The long hole 12c on the bottom bracket 12b allows an adjustment of total supporting structure leveling height by its screw locking positions. The intrusion detection apparatus provides a means of stopping trains at platforms through the use of track bed intrusion sensors which are formed by using at least one contact plate. The track bed intrusion sensor is designed to detect and amplify vibrations and movements detected and transmitted by using a noisy cable. The noisy cable is installed into a cable recess located or formed on the contact plate, which preferably held onto place by using a fastening means such as rubber filler or protective material, which may protect the cable being exposed. Preferably, the sensor cables are to be routed along the contact plate, or more than one row of contact plates of a track. The noisy cable, which takes the form of a coaxial cable, able to generate at least one electrical signal with a frequency profile that are proportional to the mechanical deformation or movement applied to the cable or the contact plate having the cable. When motion imparted to the contact plate, the noisy cable will generates an electrical signals with a frequency profile which are conducted, preferably via an electrically quiet coaxial cable (RG-59), to a signal analyzer. Preferably, the contact plate to be installed as continuous row to provide coverage for intrusion detection of the entire active section of each station platform. The contact plates are constructed from a thin, rectangular plate. The contact plates is manufactured from a fiberglass reinforced plastic, preferably using a resin process.

Preferably, the contact plate lower lateral sections will be assembled with a fasteners, preferably stainless steel rivets and screws. Exposed surface will be finished with UV resistant polyurethane paint preferably. In addition, a non-slip sand-type surface treatment in polyurethane could also be applied to the top surface of the contact plates.

Preferably, the contact plates preferably are supported on a coil springs which are fastened to the top angle support structures. Preferably, the coil springs are stainless steel inversed con shape coil. The contact plates are fixed in position which is only allowed for downward movement. The springs installed underneath the contact plates, is designed to have significant compression if the weight of object on the contact plate is greater than a predefined weight, such as 7kg. The predefined weight is defined based on research and testing on the object weight or human weight or formula calculation as mentioned in the present application.

When the contact plates are compressed down with a weight of more than the predefined minimum object weight or human weight, the noisy cable will pick up the frequency generated by the intruder and will transmit the frequency signal to the signal analyzer.

Preferably, the contact plate is designed to be able to support heavy loads, such that when the load is removed, the contact plate may not or will not exhibit or show signs of permanent deflection. Preferably, the contact plates to be installed between the running rails in the station platform areas may be provided with an adjustment mechanism, for both vertical and horizontal adjustment, to allow for future modifications and any necessary adjustment that may be required.

Preferably, the signal analyzer comprises of bandpass filtering, measuring and alarm generating means. The bandpass filter is designed to filter out a predefined frequency range, for example below 1 Hz and above 15 Hz or any other refined frequency range which is more accurately to define it is a human intrusion based on the final and actual set up on the particular platform. The predefined frequency is calculated based on research and testing of the system with or without human intrusion.

The measuring means comprise of a Schmitt trigger and pulse length separator. The filtered signal will then pass through a Schmitt trigger reacts to the value of the slope of the leading edge of incoming signal. If the slope is above the preselected value, Schmitt trigger triggers and remain latched. A pulse length separator is uses to measure the length of time that the Schmitt trigger remains latched. If the latching time is greater than a preset time, an alarm signal is generated by a pulse length separator. The pulse length separator is use to eliminate error signal reading cause by a high frequency spikes which is typically very short duration. It has been found that a latching time of about 0.25 second is a good compromise for many applications. However, the latching time period can be adjusted by an adjustable resistor, which is field adjustable to suit the particular application. Preferably, the alarm signal is then fed into an alarm generating means to produce an appropriate signal for driving relays which interface with SCADA, Automatic Train Control System and any other external system. Preferably, the noisy cable is mount in the glove on the contact plate. This is to minimize the exposure of the noisy cable to other mechanical system which may get damaged.

Preferably, the noisy cable will be connected to a RG59 coaxial cable before exiting the track area. The RG59 cable will then be extended to the equipment room to connect to the signal analyzer. This able to eliminate the error signal generation during the extension from the platform to the signal analyzer

The inversed con shape spring is use to replace the conventional resilient block, as the new and inventive spring design able to eliminate the object which is lighter than a predefined weight, such as 7kg from triggering the alarm

Preferably, the steel structure supporting means with adjustment mechanism ease the adjustment for contact plates leveling and position for an accurate and appropriate set up.

Another embodiment of the present invention relates to an improved intrusion detection apparatus with its improved features to minimize an error reading caused by a non-human object, for example a water bottle by replacing the prior resilient block to a coil spring support, which will only pick up an intruder frequency for object heavier than a predefined minimum weight, such as 7kg. The usage of an RG59 coaxial cable to extend the signal transmission from the platform area to the signal analyzer in equipment room has also minimize the error alarm due to the frequency signal pick up in between the platform and equipment room area. The new and inventive design of contact plates allows the noisy cable to be installed inside the glove which is minimize its exposure to the external environment, to minimize the error frequency signal pick up from the environment factor like strong wind. The present invention may be embodied in other specific forms without departing from its essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore indicated by the appended claims rather than by the foregoing description. All changes, which come within the meaning and range of equivalency of the claims, are to be embraced within their scope.

Claims

1 . An apparatus comprising a vibration pick up means for detecting vibration signal and transmitted to a signal analyzing means (8), via the extension of coaxial cable, wherein the vibration pick up means includes a contact plate (3) and a sensor cable (4), characterized in that the contact plate (3) placed over a coil spring (1 1 ) in a row having the sensor cable (4) fitted throughout length of the row to dampened the vibration signal that triggers an alert signal when an intruder object having weight greater than a predefined weight is detected, in which the predefined weight is defined by adjusting damping coefficient of the spring (1 1 ).

2. The apparatus according to claim 1 , wherein the contact plate includes at least one groove (3a, 3b) to accommodate the sensor cable (4).

3. The apparatus according to claim 1 , further includes at least one filler 14 for securing the sensor cable (4) onto the contact plate (3).

4. The apparatus according to claims 1 to 3, wherein the vibration signal is detected and transmitted to a signal analyzing means (8), via the extension of coaxial.

5. The apparatus according to claims 1 to 4, wherein the coil spring (1 1 ) is mounted on a supporting structure (12,13), in which the contact plates (3) placed over the supporting structure (12,13) having the coil spring (1 1 ).

6. The apparatus according to claims 1 to 5, wherein the contact plates (3) are independently mounted on the supporting structure 12, 13 and the coil spring (1 1 ), so as to move independently of each other.

7. The apparatus according to claims 1 to 6, wherein the contact plates (3) are constructed from a thin, rectangular plate such as fiberglass reinforced plastic.

8. The apparatus according to claims 1 to 7, wherein the contact plates (3) is mounted on the supporting structure (12,13).

9. The apparatus according to claims 1 to 8, wherein the supporting structure (12,13) having a bottom bracket (12b) and a top bracket (12a), wherein the bottom bracket (12b) includes a long hole (12c) allows a leveling height adjustment of the supporting structure by a locking positions.

10. The apparatus according to claims 1 to 9, wherein damping coefficient of the spring set to meet the critical damped and overdamped when the intruder object weight is lower than the set minimum weight.

1 1 . The apparatus according to claims 1 to 10, wherein the apparatus set up in a train station.

12. The apparatus according to claim 1 1 , further comprising a sensor platform control panel (10), a cable (4), an end of line resistor (5) and a BNC (Bayonet Neill-Concelman) coaxial cable joint (6) typically installed in the train platform area; and a coaxial extension cable (7,9) which is are an extension from the sensor cable (4) to the signal analyzing means (8) and/or the signal analyzing means (8) to platform control panel (10).

13. The apparatus according to claims 1 1 and 12, further includes another row placed between passenger a platform (1 ) and a railway track (2a,2b) having the sensor cable (4) fitted throughout length of the row such that the dampened vibration signal triggers the alert signal when the intruder object weight is greater than a predetermined minimum weight detected.

14. The apparatus according to claims 1 1 to 13, wherein the signal analyzing means (8) send a relay signal to a train operator using a supervisory control and data acquisition (SCADA) and Automatic Train Control System (ATC) to carry out an action to stop at least one emerging train to a particular platform area having the apparatus.

15. The apparatus according to claims 1 1 to 14, wherein the signal analyzing means (8) sends a signal to a platform control panel (10), via a coaxial cable to activate or trigger at least one alarm system fitted into the apparatus.

16. The apparatus according to claims 1 1 to 15, wherein the alert signal is fed into an alarm generating means to produce an appropriate signal for driving relays which interface with SCADA, Automatic Train Control System or any other external system.

17. A system for detecting vibration signal and transmitted to a signal analyzing means (8), by a vibration pick up means, wherein the vibration pick up means comprising a contact plate (3) and a sensor cable (4), characterized in that the contact plate (3) placed over a coil spring (1 1 ) in a row having the sensor cable (4) fitted throughout length of the row to dampened the vibration signal that triggers an alert signal when an intruder object having weight greater than a predefined weight is detected, in which the predefined weight is defined by adjusting damping coefficient of the spring (1 1 ).

18. The system according to claim 17, wherein the contact plate includes at least one groove (3a, 3b) to accommodate the sensor cable (4).

19. The system according to claim 17, further includes at least one filler 14 for securing the sensor cable (4) onto the contact plate (3).

20. The system according to claims 17 to 19, wherein the vibration signal is detected and transmitted to a signal analyzing means (8), via the extension of coaxial.

21 . The system according to claims 17 to 20, wherein the coil spring (1 1 ) is mounted on a supporting structure (12,13), in which the contact plates (3) placed over the supporting structure (12,13) having the coil spring (1 1 ).

22. The system according to claims 17 to 21 , wherein the contact plates (3) are independently mounted on the supporting structure (12,13) and the coil spring (1 1 ), so as to move independently of each other.

23. The system according to claims 17 to 22, wherein the contact plates (3) are constructed from a thin, rectangular plate such as fiberglass reinforced plastic.

24. The system according to claims 17 to 23, wherein the contact plates (3) is mounted on the supporting structure (12,13).

25. The system according to claims 17 to 24, wherein the supporting structure (12,13) having a bottom bracket (12b) and a top bracket (12a), wherein the bottom bracket (12b) includes a long hole (12c) allows a leveling height adjustment of the supporting structure by a locking positions.

26. The system according to claims 17 to 25, wherein damping coefficient of the spring set to meet the critical damped and overdamped when the intruder object weight is lower than the set minimum weight.

27. The system according to claims 17 to 26, wherein the system set up in a train station.

28. The system according to claim 27, further comprising a sensor platform control panel (10), a cable (4), an end of line resistor (5) and a BNC (Bayonet Neill-Concelman) coaxial cable joint (6) typically installed in the train platform area; and a coaxial extension cable (7,9) which is are an extension from the sensor cable (4) to the signal analyzing means (8) and/or the signal analyzing means (8) to platform control panel (10).

29. The system according to claims 27 and 28, further includes another row placed between passenger a platform (1 ) and a railway track (2a,2b) having the sensor cable (4) fitted throughout length of the row such that the dampened vibration signal triggers the alert signal when the intruder object weight is higher than a predetermined minimum weight detected.

30. The system according to claims 27 to 29, wherein the signal analyzing means (8) send a relay signal to a train operator using a supervisory control and data acquisition (SCADA) and Automatic Train Control System (ATC) to carry out an action to stop at least one emerging train to a particular platform area having The system.

31 . The system according to claims 27 to 30, wherein the signal analyzing means (8) sends a signal to a platform control panel (10), via a coaxial cable to activate or trigger at least one alarm system fitted into the system.

32. The system according to claims 27 to 31 , wherein the alert signal is fed into an alarm generating means to produce an appropriate signal for driving relays which interface with SCADA, Automatic Train Control System or any other external system.