TWI651691B - A rail cable theft system - Google Patents

Abstract

A track cable anti-theft system is suitable for detecting a track cable, the track cable has a power transmission start end and a power transmission end, and includes a sensing device and a first loading device. The sensing device is disposed at the beginning of the transmission and includes a current sensing component and a sensing terminal control circuit. The first loading device is disposed at the end of the power transmission and includes a first switching member, a first load member, and a first loading control circuit. The first loading control circuit controls the first switching member such that the first load member uses power of the track cable, and the current sensing member detects a current passed by the track cable, so that the sensing terminal control circuit determines the track Is the cable complete?

Description

Track cable anti-theft system

The invention relates to a cable anti-theft system, in particular to a track cable anti-theft system.

Due to the high price of metal recycling, the phenomenon of cable theft is very serious. In order to effectively carry out cable anti-theft work in the early stage, the daily patrol line system was established to activate the cable alarm system on the one hand, and to strengthen the prevention and control of frequently occurring areas on the other hand.

With the advancement of technology, the cable burglar alarm has been added to the cable anti-theft system, and the cable burglar alarm detects the cable line. If an abnormality occurs, the instrument will send an alarm signal. At present, common cable anti-theft technologies include power line carrier communication monitoring and anti-theft system, capacitance detection and monitoring anti-theft system, and current detection type monitoring and anti-theft system.

The power line carrier communication monitoring technology integrates transmission signals into power and belongs to a concept derived from the intersection of power and communication. In the wire and cable anti-theft system, the signal transmission means is used, and the detection carrier signal is loaded on the cable of the detection range, and the alarm device of the monitoring center is connected with the carrier signal on the monitored cable. Once the cable cross section causes the signal transmission to be interrupted, the alarm cannot be used. When the signal is received, it will automatically alarm to achieve the warning function.

Capacitance detection and monitoring technology is to first short-circuit the cable terminal with a pair of vacant cables, and connect the other end to the multi-resonant sway of the alarm. When the cable is working properly, the oscillator's oscillator does not vibrate. When the cable is out In the line section, the vacant cable becomes a simple capacitor, the oscillator outputs a signal, causing an alarm, and the frequency of the oscillator output signal varies with the position at which the cable is cut.

The current detection type monitoring technology determines the integrity of the cable system by detecting whether there is a transmission current in the cable loop. That is to say, when the cable works normally, the detection system does not respond. When there is no current in the cable, the detection system activates the alarm system.

Please refer to Taiwan Patent No. M487496, a cable anti-theft notification device and system thereof, which discloses a cable anti-theft device using power line carrier technology. The power line carrier is an information transmission technology, which is to add information waves to the power line to allow the power line to transmit power. In addition, it also sends and receives digital information.

However, the technology of power line carrier as a cable anti-theft system has the following disadvantages:

First, the information transmission is too close:

The power carrier is to add high-frequency information to the power line, and the high-frequency information will be attenuated as the distance increases. Therefore, for long-distance cables, a power carrier anti-theft device must be set at intervals, and the power carrier is also susceptible. Electromagnetic disturbance (EMI) interferes with the transmission distance.

Second, unable to pass the transformer:

The transformer in the power system is transformed by alternating current, and is composed of two separate and mutually inductive coils. During the transformer induction process of AC power, the power carrier cannot be transmitted to another coil, resulting in the power carrier failing to pass. transformer.

Third, it will be absorbed by the surge absorber:

Surge waves are noises in the power system and can damage electrical equipment. Therefore, a surge absorber is installed on the power system to absorb the surge to protect the electrical equipment. The power carrier is a voltage carrier on the power line, and the surge The absorber will absorb the power carrier and make the power carrier unable to transmit in the power line.

Therefore, how to extend the distance of the anti-theft of the cable and reduce the number of anti-theft devices is an urgent need for the technicians.

In view of the above, it is an object of the present invention to provide a track cable anti-theft system for detecting a track cable having a power transmission start end and an opposite power transmission end, the track cable anti-theft system including an inductive device. And a first loading device.

The sensing device is disposed at the beginning of the power transmission, and includes a current sensing component and a sensing terminal control circuit electrically connected to the current sensing component.

The first loading device is disposed at the end of the power transmission, and includes a first switch member, a first load member electrically connected to the first switch member, and a first load control circuit electrically connected to the first switch member.

The first loading control circuit controls the first switching member such that the first load member uses power of the track cable, and the current sensing member detects a current passed by the track cable, so that the sensing terminal control circuit determines the track Is the cable complete?

Another technical means of the present invention lies in the above induction The device further includes an information transceiver circuit electrically connected to the sensing terminal control circuit for externally releasing the information of the track cable.

Another technical means of the present invention is that the first loading control circuit has a first encoding module for controlling the frequency of opening and closing of the first switching member.

A further technical means of the present invention is the above-mentioned rail cable anti-theft system, further comprising at least one second loading device disposed in the middle of the track cable, comprising at least one second switch member, and a second switch member a second load member connected to the second load control circuit and a second load control circuit electrically connected to the second switch member, the second load control circuit having a second coding module for controlling the frequency of opening and closing of the second switch member .

Another technical means of the present invention is that the sensing terminal control circuit has a decoding module for analyzing the frequency generated by the first loading device and the second loading device.

Another technical means of the present invention is that the current sensing member is a coil type current sensing element, and the first load member and the second load member are resistive power consuming elements.

Another object of the present invention is to provide a track cable anti-theft system for detecting a plurality of track cables, each track cable having a transmission start end and an opposite power transmission end, the transmission start ends of the plurality of track cables being connected together, The track cable anti-theft system includes a sensing device and a plurality of first loading devices.

The sensing device is disposed at the beginning of the plurality of power transmissions, and includes a current sensing component, and a sensing terminal that is electrically connected to the current sensing component The circuit has a decoding module.

The plurality of first loading devices are respectively disposed at each of the power transmission ends, and each of the first loading devices includes a first switching member, a first load member electrically connected to the first switching member, and a first switch The first loading control circuit is electrically coupled to each of the first loading control circuits, and each of the first loading control circuits has a first encoding module for controlling the frequency of opening and closing of the first switching member.

Each first load control circuit controls the connected first switch member such that the plurality of first load members use the power of the track cable at a different frequency, and the current sensing member detects the current through the plurality of track cables, The decoding module of the sensing end control circuit can analyze different frequencies to determine whether the complex track cable is complete.

Another technical means of the present invention is that the sensing device further includes an information transceiver circuit electrically connected to the sensing terminal control circuit for externally releasing information of the plurality of track cables.

Another technical means of the present invention is that the track cable anti-theft system further includes a plurality of second loading devices disposed in the middle of the plurality of track cables, including a plurality of second switch members, and the plurality of second switch members respectively a second load component connected to the second load control circuit and a second load control circuit electrically connected to the second switch component, each second load control circuit has a second coding module to control the connected second switch component The frequency of closure.

Still another technical means of the present invention is that the current sensing member is a coil type current sensing element, and the first load member and the second load member are resistive power consuming elements.

The beneficial effect of the present invention is that the first loading device is at the end of the transmission of the track cable, and the frequency of using the power of the track cable causes the current passing through the track cable to rise and fall in frequency so as to be placed on the track. The sensing device at the beginning of the transmission of the cable can sense the frequency of the power used by the first loading device, is not affected by the distance of the track cable, is not absorbed by the noise absorber, and can be sensed by the transformer.

3‧‧‧Track cable

31‧‧‧Transportation start

32‧‧‧ End of transmission

4‧‧‧Induction device

41‧‧‧ Current sensing components

42‧‧‧Sensor control circuit

421‧‧‧Decoding module

43‧‧‧Information Transceiver Circuit

5‧‧‧First loading device

51‧‧‧First switch member

52‧‧‧First load member

53‧‧‧First load control circuit

531‧‧‧First coding module

6‧‧‧Second loading device

61‧‧‧Second switch member

62‧‧‧Second load member

63‧‧‧Second load control circuit

631‧‧‧Second coding module

1 is a schematic diagram showing a first preferred embodiment of the cable anti-theft system of the present invention; FIG. 2 is a schematic view of the device of the first preferred embodiment; FIG. 3 is a schematic view of the device The first loading device of the first preferred embodiment; FIG. 4 is a schematic view of a second preferred embodiment of the cable anti-theft system of the present invention; FIG. 5 is a schematic view of the device, illustrating the second preferred embodiment A second loading device; FIG. 6 is a system diagram illustrating a third preferred embodiment of the cable anti-theft system of the present invention; and FIG. 7 is a system diagram illustrating a fourth preferred embodiment of the cable anti-theft system of the present invention. Example.

Relevant patent applications and technologies related to the present invention The detailed description of the four preferred embodiments with reference to the following drawings will be clearly presented. It should be noted that before the detailed description, similar elements are denoted by the same reference numerals.

1 and 2, a first preferred embodiment of a track cable anti-theft system according to the present invention is applicable to detecting a track cable 3 having a power transmission end 31 and an opposite power transmission end 32. The first preferred embodiment includes a sensing device 4 and a first loading device 5.

At least one transformer may be disposed in the track cable 3, and a low-voltage to high-voltage transformer may be disposed to reduce the loss of power transmission, or a high-voltage to low-voltage transformer may be provided to provide equipment for use in the power-consuming area. There is no transformer and it should not be limited to this.

The transmission start end 31 of the track cable 3 is connected to the transmission network to obtain the power of the transmission network, and transmits the power to the transmission end 32 of the track cable 3, so that the track cable 3 has power all over the line to provide the tram or the track. Use of electrical equipment.

The sensing device 4 is disposed at the beginning of the power transmission 31, and includes a current sensing component 41, a sensing terminal control circuit 42 electrically connected to the current sensing component 41, and an information transceiver circuit 43 electrically connected to the sensing terminal control circuit 42. .

The current sensing member 41 is a coil type current sensing element, and an induction coil is disposed around the outer circumference of the track cable 3, and the current of the track cable 3 is obtained by electromagnetic induction of alternating current, and the current sensing member 41 does not The track cable 3 is electrically connected and does not affect the power transmission of the track cable 3.

The sensing end control circuit 42 has a decoding module 421 for analyzing the current change of the track cable 3 to obtain the frequency of use of the power of the first loading device 5.

The information transceiver circuit 43 is configured to externally release the information of the track cable 3. Preferably, the information transceiver circuit 43 uses the network to release the information of the track cable 3 so that the train control center can know whether the track cable 3 is Normal, or has been stolen. In actual implementation, the information transceiver circuit 43 can use other communication technologies to externally release the information of the track cable 3, and should not be limited thereto.

The first loading device 5 is disposed at the power transmitting end 32 and includes a first switching member 51 , a first load member 52 electrically connected to the first switching member 51 , and a first electrical connection with the first switching member 51 . The first load control circuit 53.

The first loading control circuit 53 controls the first switching member 51 to open and close to control the power of the first load member 52 to use the track cable 3, and the current sensing member 41 detects the current passing through the track cable 3, so that The sensing end control circuit 42 determines whether the track cable 3 is intact.

The first loading control circuit 53 has a first encoding module 531 for controlling the frequency of opening and closing of the first switching member 51. The first encoding module 531 controls the first switch at a frequency of 1 Hz to 10 Hz. Member 51. Preferably, the frequency of the first encoding module 531 is 1 Hz, so that the first load member 52 uses the power of the track cable 3 at a frequency of 1 Hz. In actual implementation, the encoded parameters can be set in an interval mode. The transmission frequency is controlled by a frequency mode such as a variable frequency, and should not be limited thereto.

The first load member 52 is a resistive power consuming element. When the first switch member 51 is turned on, the first load member 52 uses the power of the track cable 3 to raise the current of the track cable 3, and when the first switch member 51 is open, the first load member 52 does not. The electric current of the rail cable 3 is used to lower the current of the rail cable 3.

For example, the voltage of the track cable 3 is 220 volts, and the first load member 52 is 2200 ohms. When no other load is connected, the current of the track cable 3 changes at a continuous frequency of 0 and 0.1 amps. When a 220 ohm device is using the power of the track cable 3, the current of the track cable 3 will vary at a continuous frequency of 1 and 1.1 amps. When four 220 ohm devices are using the power of the track cable 3, the current of the track cable 3 will vary at a continuous frequency of 4 and 4.1 amps.

Since the first load member 52 does use the electric power of the rail cable 3, the voltage of the rail cable 3 is not changed, and only the current of the rail cable 3 is raised. The current change of the track cable 3 is not a noise, and cannot be eliminated by a noise filter in the system or a surge noise filter.

In addition, the first load member 52 does use the electric power of the rail cable 3, and the current of the rail cable 3 rises when power is used, and the current of the rail cable 3 decreases when power is not used, and the current sensing of the induction device 4 The current induced by the member 41 is not affected by the length of the track cable 3.

The inventor has emphasized that the power of the first loading device 5 using the track cable 3 is encoded, and the sensing device 4 analyzes that the current change of the track cable 3 has a coding characteristic, and the track cable 3 can be judged. Overall integrity.

When the other equipment in the track cable 3 is turned on or off, or the current generated by the train by using power, or leaving, does not affect the current variation of the frequency generated by the first loading device 5, The sensing device 4 analyzes the current variation of the frequency generated by the first loading device 5, and can determine that the track cable 3 is intact.

4 and 5 are a second preferred embodiment of a track cable anti-theft system according to the present invention. The second preferred embodiment is substantially the same as the first preferred embodiment, and the same portions are not detailed here. The description is different in that the track cable 3 anti-theft system further comprises at least one second loading device 6.

The second loading device 6 is disposed in the middle of the track cable 3, and includes at least one second switch member 61, a second load member 62 electrically connected to the second switch member 61, and a second switch member 61. The second load control circuit 63 is electrically connected.

The second load member 62 is a resistive power consuming component. The second load control circuit 63 has a second encoding module 631 for controlling the frequency of opening and closing of the second switch member 61. Preferably, the first encoding module 531 and the second encoding module 631 generate different frequencies.

For example, the first encoding module 531 uses a frequency of 1 Hz, and the second encoding module 631 uses a frequency of 2 Hz to enable the sensing. The device 4 can respectively sense the frequency of power consumption of the first loading device 5 and the second loading device 6.

The sensing device 4 can respectively sense the power frequency of the first loading device 5 and the second loading device 6, and further determine whether the track cable 3 is completely intact or a section of the track cable 3 out.

When the inductive terminal control circuit 42 of the sensing device 4 analyzes the current of the track cable 3 and obtains the frequency characteristics of the first loading device 5 and the second loading device 6, it can be determined that the track cable 3 is completely intact. The information transceiver circuit 43 externally issues the complete message of the track cable 3.

When the induction end control circuit 42 of the sensing device 4 analyzes the current of the track cable 3, and only obtains the frequency characteristic of the second loading device 6, it can be determined between the first loading device 5 and the second loading device 6. A problem occurs in the track cable 3, and the information transmitting and receiving circuit 43 externally issues a message that a problem occurs in the sections of the first loading device 5 and the second loading device 6 of the track cable 3.

When the induction end control circuit 42 of the sensing device 4 analyzes the current of the track cable 3, the frequency characteristics of the first loading device 5 and the second loading device 6 are not obtained, and the sensing device 4 and the second loading can be determined. There is a problem with the track cable 3 between the devices 6, and the information transmitting and receiving circuit 43 externally issues a message of a problem with the segments of the sensing device 4 and the second loading device 6 of the track cable 3.

Wherein, according to the set length of the track cable, a plurality of second loading devices may be installed to distinguish the track cable into multiple segments, and Immediately monitor the condition of each section of the track cable.

Referring to FIG. 6, a third preferred embodiment of a track cable anti-theft system according to the present invention is substantially the same as the first preferred embodiment, and the same portions are not described in detail herein. The difference is that the number of the track cables 3 is plural, and the number of the first loading devices 5 is plural.

Each track cable 3 has a power transmission start end 31 and an opposite power transmission end 32, and the power transmission start ends 31 of the plurality of track cables 3 are connected together. In the third embodiment, the number of the track cables 3 is two to match the track setting of the tram, and the actual implementation should not be limited thereto.

The transmission start 31 of the plurality of track cables 3 uses the same source of power and then carries the power along the track to provide for use of the associated equipment of the tram transportation system.

The sensing device 4 is disposed at the complex transmission start end 31 to simultaneously sense the current change of the plurality of track cables 3, including a current sensing member 41, and a sensing end control circuit 42 electrically connected to the current sensing member 41. The sensing end control circuit 42 has a decoding module 421

The plurality of first loading devices 5 are respectively disposed at each of the power transmission ends 32. Each first loading device 5 includes a first switching member 51, a first load member 52 electrically coupled to the first switch member 51, and a first load control circuit 53 electrically coupled to the first switch member 51. Each first loading control circuit 53 has a first encoding module 531 for controlling the frequency of opening and closing of the first switching member 51.

Each of the first loading control circuits 53 controls the connected first switching member 51 to open and close, and the frequency of the opening and closing of the first switching member 51 is controlled by the first encoding module 531, and the frequency thereof can be set, so that the frequency can be set. The plurality of first load members 52 use the power of the track cable 3 at a different frequency.

For example, one of the first load members 52 of the first loading device 5 uses the power of the track cable 3 at a frequency of 1 Hz, and the first load member 52 of the other first loading device 5 uses the frequency at a frequency of 1.5 Hz. The power of the track cable 3, and so on.

The current sensing component 41 detects the current passing through the plurality of track cables 3, and the decoding module 421 of the sensing terminal control circuit 42 can analyze the detected current changes to different frequency characteristics for respectively determining the plurality of track cables 3 is it complete.

When the induction end control circuit 42 of the sensing device 4 analyzes the current change of the plurality of track cables 3 and obtains the frequency characteristics of the plurality of first loading devices 5, it can be determined that the plurality of track cables 3 are intact. When it is found that the frequency characteristic of one of the first loading devices 5 disappears, it can be judged that the track cable 3 in which the first loading device 5 is located has a problem. The information of the plurality of track cables 3 is externally distributed by the information transmitting and receiving circuit 43 of the sensing device 4.

The current sensing member 41 is a coil type current sensing element, and an induction coil is disposed on the track cable 3, and the current of the track cable 3 is obtained by electromagnetic induction of alternating current, and is not electrically connected to the track cable 3, and does not The power transmission of the track cable 3 is affected.

The first load member 52 is a resistive power consuming element. When the first switch member 51 is turned on, the first load member 52 uses the power of the track cable 3 to raise the current of the track cable 3, and when the first switch member 51 is open, the first load member 52 does not. The electric current of the rail cable 3 is used to lower the current of the rail cable 3.

FIG. 7 is a fourth preferred embodiment of a track cable anti-theft system according to the present invention. The fourth preferred embodiment is substantially the same as the third preferred embodiment, and the same portions are not described in detail herein. The difference is that the track cable 3 anti-theft system further comprises a plurality of second loading devices 6.

The plurality of second loading devices 6 are disposed in the middle of the plurality of track cables 3, and include a plurality of second switch members 61, a plurality of second load members 62 electrically connected to the second switch members 61, and a plurality of second and second load members, respectively The second loading control circuit 63 is electrically connected to the switching member 61. Each of the second loading control circuits 63 has a second encoding module 631 for controlling the frequency of opening and closing of the connected second switching member 61.

The plurality of second load members 62 are resistive power consuming components. When the plurality of second switching members 61 are turned on, the plurality of second load members 62 use the electric power of the rail cable 3 to raise the current of the track cable 3, and when the plurality of second switch members 61 are disconnected, the plural number The second load member 62 does not use the electric power of the rail cable 3, so that the current of the track cable 3 is lowered.

The first encoding module 531 of the plurality of first loading control circuits 53 and the second encoding module 631 of the plurality of second loading control circuits 63 are used at different frequencies so that the sensing terminal control circuit 42 The decoding module 421 can analyze different frequency characteristics to further determine whether the complex track cable 3 is complete.

It can be seen from the above description that the track cable anti-theft system of the present invention does have the following effects:

First, it will not affect the power transmission:

The current sensing member 41 is a coil type current sensing element, and an induction coil is disposed on the track cable 3, and the current of the track cable 3 is obtained by electromagnetic induction of alternating current, and is not electrically connected to the track cable 3, and does not The power transmission of the track cable 3 is affected.

Second, not affected by cable length:

The first load member 52 does use the electric power of the rail cable 3, and the current of the rail cable 3 rises when power is used, and the current of the rail cable 3 decreases when power is not used, and the change in current is not affected by the length of the rail cable 3. Affected.

Third, will not be eliminated:

The first load member 52 does use the power of the track cable 3, and does not change the voltage and only boosts the current. The current change of the track cable 3 is not a noise, and cannot be eliminated by a noise filter in the system or a surge noise filter.

In summary, the plurality of first loading devices 5 and the plurality of second loading devices 6 can operate independently, without connecting to the remote end, and use the power of the track cable 3 at the set frequency, the sensing device 4 The current change of the plurality of track cables 3 can be analyzed to obtain the frequency characteristics of the first loading device 5 and the second loading device 6, and the plural number is further determined. Whether the track cable 3 is complete or not, and then the analysis information is transmitted to the outside, so that the control center can immediately grasp the condition of the plurality of track cables 3, so the object of the present invention can be achieved.

However, the above is only the four preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes made by the scope of the present invention and the description of the invention are Modifications are still within the scope of the invention.

Claims (8)

A track cable anti-theft system for detecting a track cable, the track cable having a power transmission start end and an opposite power transmission end, comprising: an inductive device disposed at the beginning of the power transmission, comprising a current sensing component, and a a sensing end control circuit electrically connected to the current sensing member; and a first loading device disposed at the end of the power transmission, comprising a first switching member, a first load member electrically connected to the first switching member, and a first a first loading control circuit electrically connected to the first switching member; the first loading control circuit has a first encoding module for controlling a frequency of opening and closing of the first switching member, so that the first load member uses the track The power of the cable, the current sensing component detects the current passing through the track cable, and the sensing terminal control circuit has a decoding module for analyzing the frequency generated by the first loading device, and causing the sensing terminal control circuit to determine the track Is the cable complete? The track cable anti-theft system according to claim 1, wherein the sensing device further comprises an information transceiving circuit electrically connected to the inductive end control circuit for externally releasing information of the track cable. The track cable anti-theft system according to claim 2, further comprising at least one second loading device disposed in the middle of the track cable, comprising at least one second switch member, and an electrical connection with the second switch member a second load member, and a second load control circuit electrically coupled to the second switch member, the second load control circuit having a second code mode The group is configured to control the frequency of opening and closing of the second switch component, and the decoding module of the sensor control circuit analyzes the frequency generated by the second loading device. The track cable anti-theft system according to claim 3, wherein the current sensing member is a coil type current sensing element, and the first load member and the second load member are resistive power consuming elements. The utility model relates to a track cable anti-theft system, which is suitable for detecting a plurality of track cables, each track cable has a power transmission start end, and an opposite power transmission end, and the transmission start ends of the plurality of track cables are connected together, comprising: a sensing device, disposed in the plurality The beginning of the transmission includes a current sensing component, and a sensing end control circuit electrically connected to the current sensing component, the sensing terminal control circuit has a decoding module, and a plurality of first loading devices are respectively disposed at each of the transmitting ends. Each first loading device includes a first switching member, a first load member electrically coupled to the first switching member, and a first loading control circuit electrically coupled to the first switching member, each first loading The control circuit has a first encoding module for controlling the frequency of opening and closing of the first switching member; each first loading control circuit controls the connected first switching member such that the plurality of first load members are different The frequency of the track cable in which the frequency is used, the current sensing component detects the current passing through the plurality of track cables, and the sensing end controls The path decoding module is different frequencies can be analyzed to determine whether the plurality of track cable is complete. The track cable anti-theft system according to claim 5, wherein the sensing device further comprises an information transceiving circuit electrically connected to the inductive end control circuit for externally releasing information of the plurality of track cables. The track cable anti-theft system according to claim 6, further comprising a plurality of second loading devices disposed in the middle of the plurality of track cables, including a plurality of second switch members, the plurality of electrically connected to the second switch member a second load member, and a plurality of second load control circuits respectively electrically connected to the second switch member, each second load control circuit having a second coding module for controlling the connected second switch member to open and close The frequency. The track cable anti-theft system according to claim 7, wherein the current sensing member is a coil type current sensing element, and the plurality of first load members and the plurality of second load members are resistive power consuming elements.