JP2716960B2 - Moving object detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a magnetic belt transport system (BT) recently developed for mountain railways and urban traffic.
M) and a device for detecting a moving body such as a train in a new transportation system such as a train.

[0002]

2. Description of the Related Art As a conventional moving object detecting device of this kind,
There is one disclosed in JP-B-60-47970. This device is called a check-in / check-out system in which two types of transmitters and transmission antennas having different transmission frequencies are mounted on the front and rear of the vehicle, and a reception loop antenna is laid at the boundary of a block section on the ground. The device is used. This method checks the approach of the front of the train at the entrance of the block section, stores this in the train counter on the ground to detect the presence of the train in the section, and then the tail of the train exits the block section. Check that it passes,
Thus, the storage of the train counter is released, and the absence of the train in the block section is detected.

[0003]

Since the above-mentioned conventional detecting device detects a train by radio, a transmitter for transmitting a signal from the train to ground equipment on a car,
Equipment such as a transmission antenna is required, and equipment such as a loop antenna for receiving a signal transmitted from a vehicle is also required on the ground. Therefore, the equipment is complicated both on the vehicle and on the ground. In addition, the on-vehicle equipment requires a power source, and thus is susceptible to electric circuit failure and noise of the electric circuit, and has a problem in reliability.

Accordingly, the present invention solves the above-mentioned conventional problems, does not require the equipment such as a transmitter required on a car, and the equipment on the ground can be installed in a minimum space. It is an object of the present invention to provide a moving object detection device capable of improving reliability without increasing the complexity of the equipment as in the related art and without having to consider malfunction or failure of equipment on the vehicle. And

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an apparatus for detecting a moving body such as a vehicle used in a new transportation system or the like. , A magnet detector installed on the entrance side and the exit side of a block section provided on the traveling path of the movable body for detecting the magnetism of the magnet of the movable body, and the entrance side and the entrance And a moving object detection processing device for exchanging signals with the magnet detector on the side. The moving object detection processing device includes a checking signal comparing unit, a previous value comparing unit, a determining unit including a counter that sets an initial value when there is no moving object in the block section, and magnet detection on the entry side and the exit side. The inspection device and the inspection signal comparison unit each have an inspection signal generation unit that outputs an inspection signal composed of a square wave having a constant period of a high level and a low level. The entrance-side magnet detector outputs a high-level signal when detecting the magnetism of the magnet of the moving body, and outputs a checking signal from the checking signal generating unit when detecting no magnetism of the magnet of the moving body. When the magnet detector on the advancing side detects the magnetism of the magnet of the moving body, it outputs a check signal from the check signal generation unit,
If the magnetism of the moving body is not detected, a high level signal is output.

[0006] The judging section is configured to output the inspection signal output from the inspection signal generation section to the comparison section and the inspection signal output from the inspection signal generation section to the comparison section via the entrance-side and exit-side magnet detectors. The comparison signal is used to compare the square wave with the same period in the reference signal comparison unit.If the reference signal is a square wave with the same period, the signal value output as a logical value from the reference signal comparison unit is sampled every half period. The previous value comparison unit compares the signal value output from the previous value comparison unit with the value one half cycle before, and adds 1 to the initial value when the signal value output from the previous value comparison unit continues the same value more than once. When the output signal value continues alternately with a different value, the counter counts so that 1 is subtracted from the added value, and when the initial value is added and changed, the moving object enters the blockage section. Judgment and the initial value is subtracted Moving body is adapted to determine that it has advanced from block section when you return to fine the initial value.

[0007]

FIG. 1 is a schematic front view showing a train detection apparatus (check-in / check-out system) according to one embodiment of the present invention. A train 1 is connected to a plurality of trains and runs on a straddle-type monorail 2 made of a steel pipe girder made of a magnetic material. A magnet belt 3 is mounted on the front train 1 and the rear train 1. As shown in FIGS. 2 and 3, the magnet belt 3 has permanent magnets 7 attached at predetermined intervals in the longitudinal direction of the surface of an endless belt body 6 wound between a driving wheel 4 and a driven wheel 5. The train 1 is rotated by the drive motor 8 so that the train 1 travels. The lower part of the vehicle body 10 traveling over the monorail 2 as seen from FIG. The monorail 2 is attached to the support frame 11 so as to sandwich the monorail 2. The number of vehicles per vehicle is two pairs of left and right one pair on the left and right across the monorail 2, for a total of four. In FIG. 2, reference numeral 12 denotes a support wheel running on the monorail 2.

The magnetism of the permanent magnets 7 of the magnet belt 3 mounted on the train 1 is detected on the approach (check-in) side and the advance (check-out) side of the block section 13 provided on the monorail 2 which is the traveling path of the train 1. Magnet detectors 14 and 15 are provided. Magnet detectors 14 and 15 are train detection processors
Connected to 16. The train detection processing device 16 includes a determination unit 17 and a check signal generation unit 18 as shown in FIG. The reference signal generation unit 18 generates a reference signal composed of a square wave (logical values 1 and 0) having a constant cycle of a high level and a low level,
They are output to the magnet detectors 14 and 15 and to a later-described inspection signal comparison unit 20 of the determination unit 17. Upon receiving the inspection signal from the inspection signal generator 18, the entrance-side magnet detector 14 outputs a high-level signal when detecting the magnetism of the permanent magnet 7 of the magnet belt 3 mounted on the train 1, and detects the magnetism of the permanent magnet 7. If not detected, check signal generator
Outputs the reference signal (square wave) from 18. The entry side magnet detector 15 is a permanent magnet 7 of the magnet belt 3 mounted on the train 1.
When the magnetism of the permanent magnet 7 is detected, a high-level signal is output when the magnetism of the permanent magnet 7 is not detected. When the magnet detectors 14 and 15 detect the magnetism of the permanent magnets 7 of the magnet belt 3, counting is performed in units of magnet belts 3.
In this case, two trains 1 are counted in the rear train 1 (in this case, only one of the left and right magnet belts 3 is counted).

The judgment section 17 comprises a check signal comparison section 20, a previous value comparison section 21, and a counter 22. Reference signal comparison section
Reference numeral 20 denotes an inspection signal output from the inspection signal generation unit 18 to the comparison unit, and output from the inspection signal generation unit 18 to the comparison unit via the entry-side magnet detector 14 and the entrance-side magnet detector 15. A comparison is made as to whether the reference signal is a square wave having the same period. When the previous value comparison unit 21 is a square wave having the same cycle in the above comparison, the signal value output as a logical value from the inspection signal comparison unit 20 is sampled every half cycle and sequentially compared with the value half a cycle before. Compare. Counter 22 indicates that train 1 is in block 13
The initial value (+5 in this embodiment) in the case where there is no signal is set in advance, and 1 is added to the initial value when the signal value output from the previous value comparing unit 21 has the same value and continues for more than a plurality of times. When the signal value output from the previous value comparing section 21 continues alternately with a different value, counting is performed so that 1 is subtracted from the added value. In FIG. 4, reference numeral 23 denotes a relay output unit provided in the train detection processing device 16.

Next, the operation of the embodiment will be described with reference to FIG. (1) When the train 1 does not exist in the block section 13 and the entrance and exit magnet detectors 14 and 15 do not detect the magnetism of the permanent magnets 7 of the magnet belt 3 of the train 1 (FIG. 5A). A train detection processor is installed on the entrance and exit magnet detectors 14 and 15.
A current is supplied from a power supply 16 (not shown), and a check signal is output from a check signal generator 18. In such a state, an inspection signal is output from the entrance-side magnet detector 14 and a high-level signal is output from the exit-side magnet detector 15 to the inspection signal comparison unit 20 of the train detection processor 16. The comparison signal and the high-level signal are compared by the comparison signal comparison unit 20 of the determination unit 17 of the train detection processing device 16, and when a square wave having the same cycle is output to the next previous value comparison unit 21, If they are different, they are compared with the next half cycle value, and they are compared and confirmed whether they match, and it is determined whether or not the influence is due to noise. Noise is compared for three cycles, and if it is always a high level signal, it is regarded as train detection, so that no malfunction due to noise is caused. The signal output to the previous value comparing unit 21 is treated as a 2-bit binary number, and is further subjected to AND processing to be converted to a hexadecimal number.
→ 1 → 3 → 1 → 3 → 1 ... 3 → 1 is called one set.

(2) When the train 1 enters the block 13 and the magnet detector 14 on the entry side detects the magnetism of the permanent magnet 7 of the magnet belt 3 of the train 1 (FIG. 5B). A high-level signal is output from the entry-side magnet detector 14 and a high-level signal is also output from the entry-side magnet detector 15 to the inspection signal comparison unit 20 of the train detection processing device 16. In this case, the judgment value is 3
→ 3 → 3 → 3 → 3 → 3 ... As described above, when the signal value output from the previous value comparing unit 21 has the same value and continues four or more times, the counter 22 counts to add 1 to the initial value. The counting method is based on the entry side magnet detector 14
Counts up the initial value each time a signal is received from. Then, as shown in FIG. 6 (A), when the initial value is added and changes from 6 → 7 → 8 → 9, the section where train 1 is closed
It is determined that the vehicle has entered 13. When the count value reaches 9, the train 1 is in a state where the train 1 completely enters the block 13 to the trailing train 1.

(3) The train 1 advances from the block section 13,
When the magnet detector 15 on the advance side detects the magnetism of the permanent magnet 7 of the magnet belt 3 of the train 1 (FIG. 5C). An inspection signal is sent from the entrance-side magnet detector 14 to the exit-side magnet detector.
The check signal is also sent from the check signal comparison unit of the train detection processor.
Output to 20. In this case, the judgment value is 3 → 0 → 3 → 0
→ 3 → 0 ... As described above, when the signal values output from the previous value comparison unit 21 continue alternately with different values,
The counter 22 counts so as to subtract 1 from the added value. The counting method counts down the initial value every time a signal is received from the magnet detector 15 on the advancing side. Then, as shown in FIG. 6B, when the initial value is subtracted and changes from 9 → 8 → 7 → 6, it is determined that the train 1 has advanced from the block section 13. When the count value returns to the initial value of 5 again, the above-mentioned train 1 comes out of the section 13 completely blocking the train 1 at the tail.

The counting method using the counter 22 as described above is employed for the following reasons. That is,
If the train is short, such as a one-car train, it is possible to perform sufficient detection by the processing up to that point without counting. An error occurs from the point of entry to the end of entry. For this purpose, as shown in FIG. 1, the magnet belt 3 is mounted on the front and rear portions of the train 1 and the approaching magnet detector 14 is installed.
Each time a single magnet belt 3 is detected, a signal is received and counting is performed from the initial value, and the count is reduced each time a signal is received from the magnet detector 15 on the advancing side. If this method is used, it is possible to determine whether or not the train 1 is on the block 13 regardless of the train length.

The relay output unit 23 determines whether the counter value of the counter 22 is an initial value of +5. When the counter value is +5, since the train 1 does not exist in the block section 13 as described above, the relay driver is driven to lift the non-vehicle on-rail relay (not shown). When the counter value is not +5, the train 1 is present in the block section 13, so that the driving of the relay driver is stopped and the non-vehicle relay is dropped.

In this embodiment, the train 1 is in a closed section 13.
It is very characteristic that the counter 22 has an initial value when it does not exist in the counter. Having an initial value for “no train” is that when the system goes down, the counter value becomes “0”, and thus the train 13 is regarded as “train on line” in the block 13. As a response after the system goes down, it is confirmed that there is no train 1 in the block section 13 and then the initial value is given to the counter 22 to ensure safety.

In the above embodiment, one system is shown, but two systems may be used as shown in FIGS. That is, on a line operating in a single track, the train 1 enters the block 13 from both directions, and as shown in FIG.
4, 15, 14a, and 15a are incorporated into the entrance section and the exit side of the block 13 in pairs. In this case, the system is independently processed for each approach direction of the train 1. In this way, when two types of circuits are put in one magnet detector, it is usually sufficient to process the case where the train enters from the magnet detector 14 side and goes out to the magnet detector 15 side. System magnet detector 14a
Those that enter from the side and advance toward the magnet detector 15a are wasted. For this reason, numbers having the same size and inverted signs are assigned to the initial values of both systems.
As a result, when the count values output by both systems are viewed as absolute values, they always show the same value, and the train values can be more reliably detected by comparing the output values of both systems. become. Further, since the signs of the initial value and the value of the count value of both systems are inverted, even if each system is processed in a double system by the same program, no abnormality occurs at the same time. Using a diversity system in which a program having a structure is assigned to each system, AND processing of output values at the final stage is performed to determine whether or not a train has been detected.

[0017]

According to the present invention, equipment such as a transmitter which is conventionally required on a vehicle is not required, and equipment on the ground can be installed in a minimum space. Therefore, it is not necessary to consider the malfunction or failure of the equipment on the vehicle, and the reliability can be improved. Further, since the counting method using the counter is used, it is possible to determine whether or not the moving object exists in the block section regardless of the length of the moving object. Furthermore, since the initial value is set in the counter when there is no moving object in the block section, even if the system goes down, it can be assumed that there is a moving object in the block section and safety can always be ensured. Has an effect.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a train detection device according to one embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a train.

FIG. 3 is a partial perspective view showing a drive system of the train.

FIG. 4 is a block diagram showing a detection configuration of the above.

FIG. 5 is an operation explanatory view.

FIG. 6 is an operation explanatory view.

FIG. 7 is a schematic front view showing another embodiment.

FIG. 8 is a block diagram showing a detection configuration of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Train (moving body) 2 Monorail (runway) 3 Magnet belt 7 Permanent magnet 13 Blockage section 14 Entry side magnet detector 15 Entry side magnet detector 16 Train detection processing device 17 Judgment unit 18 Reference signal generation unit 20 Reference Signal comparison section 21 Previous value comparison section 22 Counter

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-61066 (JP, A) JP-A-59-84661 (JP, A) JP-A-4-358962 (JP, A) JP-A-6-106 19539 (JP, A)

Claims (1)

(57) [Claims] An apparatus for detecting a moving body such as a vehicle used in a new transportation system or the like, comprising: a moving body having magnets installed at a front part and a rear part; Magnet detectors installed on the entrance side and exit side of the block section provided on the traveling path of the mobile object for detection, and a mobile object detection processing device that exchanges signals with the magnet detectors on the entrance side and the exit side The moving object detection processing device includes: a checking signal comparing unit, a previous value comparing unit, and a determining unit including a counter that sets an initial value when there is no moving object in the block section; The entrance-side magnet detector and the inspection signal comparison unit each have an inspection signal generation unit that outputs an inspection signal composed of a square wave having a constant cycle of a high level and a low level, and the entrance-side magnet detector moves. When the magnetism of the body magnet is detected, When the magnet of the moving body is not detected, the checking signal is output from the checking signal generating unit, and when the magnet detector of the moving side detects the magnetism of the magnet of the moving body, the checking signal from the checking signal generating unit is output. A signal is output, and a high-level signal is output if the magnetism of the moving body is not detected. The determination unit outputs the inspection signal output from the inspection signal generation unit to the comparison unit, and the entrance and exit from the inspection signal generation unit. The inspection signal comparison unit compares whether the inspection signal output to the comparison unit via the magnet detector on the side is a square wave of the same cycle, and when the inspection signal is a square wave of the same cycle, The signal value output as a logical value from the comparison unit is sampled every half cycle and sequentially compared with the value half a cycle before by the previous value comparison unit, and the signal value output from the previous value comparison unit is the same value. If it continues more than once, add 1 to the initial value and When the signal value output from the comparing unit continues alternately with a different value, the counter counts so that 1 is subtracted from the added value. A moving object detection device, which determines that the moving object has entered, and when the initial value is subtracted and returned to the initial value again, it is determined that the moving object has advanced from the block section.