JP6920253B2 - Ground radio equipment and its control method - Google Patents

Description

The present invention relates to a terrestrial radio device and a control method thereof, and is particularly suitable for being applied to a terrestrial element used in a security system for railway control.

Conventionally, the ground element applied to the railway security system receives electric power by using electromagnetic induction by the electric power wave transmitted from the on-board element mounted on the train, and drives the received electric power as a power source for various controls. The telegram data of the information is transmitted to the on-board child.

On the train side, based on the control information received by the on-board child, control to prevent collision with the train in front, derailment due to a dash to a point that is not open, and control necessary for smooth train operation. (Continuing power running, brake output, etc.) is being executed.

Once an error occurs, it can lead to a serious accident, so the ground element is required to have high safety, reliability and availability. Therefore, Patent Document 1 describes a message creating unit that creates an FSK modulated signal in which a different code is assigned to each frequency as a message for train control to the ground device of the train control system, and a message creating unit via a cable. When the coil antenna for wirelessly transmitting the supplied FSK modulation signal, the failure determination unit that determines the presence or absence of a failure based on the current flowing through the cable, and the failure determination unit determines that a failure has occurred. It is disclosed that a failure notification unit for notifying an external device of a failure is provided.

Japanese Unexamined Patent Publication No. 2016-116176

By the way, the invention disclosed in Patent Document 1 notifies an external device of a failure that has occurred in the ground device, and does not detect the occurrence of the failure in advance. Therefore, if the ground device disclosed in Patent Document 1 fails, the function of the ground device for railways as a whole is degraded, and the failed ground device returns to the normal state or fails at some point. There is a problem that the train cannot operate normally until the ground device is replaced with a normal ground device.

On the other hand, in recent years, the reliability of semiconductors, passive elements such as resistors and capacitors, and electronic components such as relays has been increasing due to the improvement of technological capabilities of each vendor and corporate efforts, and failures occur under predetermined environmental conditions. It is becoming less likely to occur.

However, electronic components applied to industrial equipment such as railways are often used for a long period of time (for example, 10 years or more). For this reason, deterioration of the life of electronic components due to high temperature operation and temperature stress such as temperature cycle and the soldering portion of the terminal to the substrate is the main factor controlling the reliability and failure rate of the electronic device.

For example, ground elements used in railroad security systems are designed to operate with the low power given by the on-board elements as power waves when the train is located at the farthest position where it can communicate. It is designed to withstand the excessive power given as a power wave from the on-board child when the train is located directly above.

However, if the train passes over the ground element at a low speed or the train stops on the ground element, the ground element will continue to receive excessive power during that time, so the electronic circuit inside the ground element will be used. The temperature of each of the constituent electronic components rises, and then when the train passes over the ground element, the temperature of each electronic component falls. When such an event occurs repeatedly, the load of the temperature cycle, which most affects the reliability of the electronic components, is applied, which affects the deterioration of the life of these electronic components.

When the ground element is affected by the temperature cycle and the internal function fails in this way, it becomes impossible to transmit the necessary control information to the on-board child, and as a result, until the ground element is repaired or replaced. Since the train cannot be operated normally, the operating rate of the railway control security system including the train operation is lowered.

The present invention has been made in consideration of the above points, and an object of the present invention is to propose a terrestrial radio device and a control method thereof that can effectively prevent a decrease in the operating rate of the entire railway control security system including train operation. It is a thing.

In order to solve such a problem, in the present invention, in a terrestrial wireless device installed on the ground and wirelessly transmitting predetermined control information to an on-board element mounted on a train, electric power is received from the outside and the received electric power is output. A first power receiving unit that operates by the electric power output from the power receiving unit and wirelessly transmits the control information to the on-board child, and the electric power output from the power receiving unit is a predetermined first. A cumulative time counting unit that counts the cumulative time exceeding the threshold voltage and at least one of an overvoltage detecting unit that detects that the power supplied from the power receiving unit to the transmitting unit has become an overvoltage are provided. In addition to the control information, the transmission unit transmits power information regarding at least one of the cumulative time counted by the cumulative time counting unit and the detection result of the overvoltage detecting unit to the on-board child. I did.

Further, in the present invention, in the control method of the terrestrial wireless device which is installed on the ground and wirelessly transmits predetermined control information to the on-board child mounted on the train, the terrestrial wireless device receives electric power from the outside and receives electric power. A power receiving unit that outputs the generated electric power and a transmitting unit that operates by the electric power output from the power receiving unit and wirelessly transmits the control information to the on-board child are provided, and the electric power output from the power receiving unit is preliminarily generated. A first step of counting the cumulative time exceeding a predetermined first threshold voltage and / or detecting that the electric power given from the power receiving unit to the transmitting unit has become an overvoltage, and the transmitting unit. However, in addition to the control information, the count result of the cumulative time when the power output from the power receiving unit exceeds the first threshold voltage and the power given from the power receiving unit to the transmitting unit are overvoltages. A second step of transmitting electric power information regarding at least one of the detection results for the above-mentioned is provided to the on-board child.

According to the terrestrial radio device of the present invention and its control method, the current status of electronic components / circuits in the terrestrial radio device can be estimated based on the power information transmitted from the terrestrial radio device, and the estimation result. Based on this, the ground element can be replaced before the ground radio device fails.

According to the present invention, it is possible to prevent a situation such as a delay or stop of train operation due to a failure of the ground element, and thus the entire railway control security system including train operation. It is possible to realize a terrestrial wireless device and a control method thereof that can effectively prevent a decrease in the operating rate as a vehicle.

It is a conceptual diagram used to explain the problem of the conventional ground element. It is a block diagram which shows the structure of the terrestrial radio apparatus by 1st and 3rd Embodiment. It is a conceptual diagram which shows the data map of the memory in 1st Embodiment. It is a block diagram which shows the structure of the terrestrial radio device by 2nd Embodiment. It is a conceptual diagram which shows the data map of the memory in 2nd Embodiment. It is a circuit diagram which shows the partial structure of the voltage monitor according to 3rd Embodiment.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Problems of the conventional ground element FIG. 1 is installed at a predetermined position between a train 2 traveling on a rail 1 in the direction of arrow a and two rails 1. It is shown that the ground element 3 is made. In FIG. 1, P ₁ indicates the farthest point of the train 2 in which the ground element 3 can communicate with the on-board element 4 of the approaching train 2, and in P ₃ , the ground element 3 is the own ground element. 3 Indicates the farthest point of the train 2 that can communicate with the on-board child 4 of the train 2 that has passed over it. Further, P ₂ is a point directly above the ground element 3. The on-board child 4 mounted on the train 2 always transmits a power wave downward.

Ground coil 3 is configured to obtain to generate electric power therein by electromagnetic induction by the power wave from the on-board coil 4 (receiving power from pickup coil 4) the train 2 has reached the point P ₁ It starts at the stage and starts transmitting the message data of the control information to the on-board child 4. Thereafter, increased power train 2 occurs in the ground coil 3 inside toward the point P _2, the train 2 (more precisely, on-board coil 4) reaches a point P _2, the ground coil 3 internally generated The electric power to be generated reaches the maximum value in the transit time zone of the train 2.

Thereafter, the train 2 but also decreases power generated by the internal ground coil 3 with distance past the point P _2, communication between board coil 4 and the ground coil 3 is continued. Then, eventually the train 2 moves past the point P _3, the ground coil 3 power generated internally below the rated voltage of each electronic component therein, the operation of the ground coil 3 is stopped.

Here, in general, the radio wave level of the power wave emitted from the on-board element 4 mounted on the train 2 is not constant for each model, type, and organization of the train 2. Therefore, normally, the ground element 3 is designed and manufactured so that it can operate within the range of the upper limit value and the lower limit value of the radio wave level of the power wave defined by the design standard or the standard.

In this case, for example, for the ground element 3 applied in the Eurovaris system compliant with the ETCS (European Train Control System) standard for Europe, the minimum received power and the maximum received power have a wide dynamic range of 700 times or more. It is stipulated that you should have.

Ground coil 3 conforming to the order ETCS standard, electronic components and circuits can operate at a minimum level of the power by the power wave received from the pickup coil 4 of the train 2 Zaisen the point P ₁ or point P ₃ in FIG. 1 while produced using, must consume it in the same electronic components and circuits for large power wave several hundred times received from pickup coil 4 of the train 2 Zaisen near the point P ₂ .. However, since the electric power generated inside the ground element by such a power wave imposes a large load on these electronic components / circuits, a corresponding temperature rise occurs in these electronic components / circuits.

In this case, for example, the ground element 3 installed in the middle of the station receives power waves at most several tens [ms] because the train 2 passes at high speed, and if it is about this time, The temperature rise of the electronic components inside the ground element 3 does not matter.

In contrast, in the ground coil 3 installed in the station yard or garage or the like, the case where the train 2 to stop in the pass or just above at a low speed not a few, power ground coil 3 from the vicinity of the point P ₂ in FIG. 1 It is said that the temperature of the electronic components / circuits inside will rise significantly after receiving the waves for a long time (tens of seconds to tens of minutes or more), and then the temperature of the electronic components / circuits will drop when the train 2 passes. Since the temperature cycle is repeated, the life of these electronic components / circuits is shortened.

The ground element 3 for railways is often put into actual operation for 10 to 20 years or more, and if such stress is applied to electronic parts / circuits over a long period of time, the life of the electronic parts / circuits will be shortened or the circuit will break down. Increases the risk of reaching. Therefore, if the life of such electronic parts / circuits can be detected in advance and the ground element 3 can be systematically replaced before it breaks down, the entire railway control security system including the operation of the train 2 can be used. It is considered that the decrease in the operating rate can be suppressed.

Therefore, in the present embodiment, we propose a ground element that appropriately notifies the outside of information that can estimate the life of electronic components / circuits inside itself due to the temperature cycle. Hereinafter, the ground element of the present embodiment will be described.

(1-2) Configuration of Terrestrial Radio Device of the Present Embodiment In FIG. 2, 10 indicates a terrestrial radio device according to the present embodiment housed inside the ground element 3 as a whole. The terrestrial wireless device 10 wirelessly communicates with the on-board child 4 mounted on the train 2 passing over the own ground element 3, and transmits necessary control information such as position information to the on-board child 4. It is a wireless communication device having a function.

In the terrestrial radio device 10, the power wave emitted from the on-board element 4 is received by the receiving antenna 11. Then, at this time, an AC voltage based on the AC current generated in the receiving antenna 11 by electromagnetic induction is applied to the rectifier 12.

The rectifier 12 rectifies the AC voltage given from the receiving antenna 11 and converts it into a DC voltage, and outputs this DC voltage to the regulator 13. Further, the regulator 13 converts the DC voltage given from the rectifier 12 into a constant voltage from which ripples are removed, and outputs this as a power supply voltage to the control unit 14 and the power amplifier 15.

Then, when the train 2 approaches the ground element 3 incorporating the ground radio device 10, the power supply voltage given from the regulator 13 to the control unit 14 and the power amplifier 15 reaches a voltage at which the control unit 14 and the power amplifier 15 can operate. First, the memory controller 20 of the control unit 14 reads out the message data of the control information stored in the memory 21.

Practically, the memory 21 is composed of a non-volatile semiconductor memory capable of reading and writing data. Then, in the memory 21, telegram data of control information such as the position of the own ground element 3 is stored in advance. Thus, after the memory controller 20 is started, the message data of the control information is read from the memory 21 at a fixed cycle (for example, a cycle of several milliseconds), and these are sequentially output to the modulator 22.

The modulator 22 modulates the message data read from the memory 21 by a predetermined modulation method such as frequency shift keying (FSK), and outputs the modulated signal thus obtained to the power amplifier 15. .. Further, the power amplifier 15 amplifies the modulated signal given from the modulator 22, and transmits the modulated signal as an information wave to the on-board element 4 via, for example, a transmitting antenna 16 composed of a loop antenna.

On the other hand, the output voltage of the rectifier 12 is also given to the voltage monitor 30. The voltage monitor 30 constantly compares the output voltage of the rectifier 12 with a preset first threshold voltage. The rated voltage of the regulator 13 is set as the first threshold voltage. Then, when the output voltage of the rectifier 12 exceeds the first threshold voltage, the voltage monitor 30 activates the timer 23 of the control unit 14, and the output voltage of the rectifier 12 exceeds the first threshold voltage. Start counting the time.

Further, the voltage monitor 30 then stops the counting operation of the timer 23 of the control unit 14 when the output voltage of the rectifier 12 becomes equal to or lower than the first threshold voltage. Then, when the timer 23 stops the counting, the timer 23 notifies the accumulator 24 of the count value at that time.

When the count value is given by the timer 23, the accumulator 24 reads the cumulative value of the count value of the timer 23 stored in the memory 21 up to that time via the memory controller 20 and converts it into the read cumulative value. At that time, the count value given by the timer 23 is added. Then, the accumulator 24 sets the latest cumulative value of the count value of the timer 23 obtained in this manner (the total time when the output voltage of the rectifier 12 exceeds the first threshold voltage up to now) in the memory controller 20. It is stored in the memory 21 via.

On the other hand, the output of the regulator 13 is also given to the overvoltage detector 31. The overvoltage detector 31 constantly compares the output voltage of the regulator 13 with a preset second threshold voltage. Then, when the voltage value of the output voltage of the regulator 13 exceeds the second threshold voltage, the overvoltage detector 31 notifies that the overvoltage is detected (hereinafter, this is referred to as an overvoltage detection notification) of the control unit 14. It is transmitted to the memory controller 20.

Here, an arbitrary voltage value can be set in the overvoltage detector 31 as the second threshold voltage. In the case of the present embodiment, as the second threshold voltage, the control unit 14 and the power amplifier when the rated output of the regulator 13 or more and the power level of the information wave emitted from the transmitting antenna 16 become an inappropriate value. A power supply voltage value of 15 is set. Therefore, when the voltage value of the output voltage of the regulator 13 is an inappropriate value for the power level of the information wave emitted from the transmitting antenna 16, the above-mentioned overvoltage detection notification is given to the memory controller 20 of the control unit 14. Become.

Then, when the overvoltage detection notification is given from the overvoltage detector 31, the memory controller 20 sets the flag stored in the predetermined area of the memory 21 (hereinafter, this is the overvoltage detection flag) to “1”.

Here, FIG. 3 shows a data map of the memory according to the present embodiment. In the memory 21, the first storage area 21A for writing the cumulative value of the count value of the timer 23 as described above, the second storage area 21B in which the above-mentioned overvoltage detection flag is stored, and each control information. A plurality of third storage areas 21C in which the telegram data of the above is stored in advance are provided.

Then, the accumulator 24 of the control unit 14 reads the cumulative value stored in the first storage area 21 from the memory 21 via the memory controller 20, or reads the cumulative value stored in the first storage area 21A. Update to the latest cumulative value. When the overvoltage detector 31 detects the overvoltage as described above, the overvoltage detector 31 sets the value of the overvoltage detection flag stored in the second storage area 21B to “1” via the memory controller 20.

The cumulative value stored in the first storage area 21A of the memory 21 and the overvoltage detection flag stored in the second storage area 21B are read out by the control information stored in each of the third storage areas 21C. The information is read out together with the control information at the timing of being output to the modulator 22, is given to the modulator 22, and is modulated by the modulator 22 together with the control information, and then the information is transmitted through the transmitting antenna 16. It is transmitted to the on-board child 4 as a wave.

Further, the on-board child 4 that has received this information wave demodulates the received information wave. Then, the on-board element 4 or a higher-level device thereof (not shown) executes vehicle control (power running continuation, braking, etc.) according to the control information based on the above-mentioned telegram data thus obtained.

Further, the on-board child 4 or a higher-level device thereof compares the above-mentioned cumulative value transmitted together with the telegram data with a preset threshold value (hereinafter, this is referred to as a cumulative value threshold value). As the cumulative value threshold value, an appropriate value is set for determining that the life of the electronic components / circuits constituting the terrestrial wireless device 10 is approaching due to the thermal stress applied to the terrestrial wireless device 10.

Then, when the cumulative value is equal to or greater than the cumulative value threshold value, the on-board child 4 or a higher-level device thereof generates alarm data provided at the time of periodic maintenance work of a predetermined maintenance department. Further, the on-board element 4 or a higher-level device thereof also generates such alarm data even when the value of the above-mentioned overvoltage detection flag transmitted together with the telegram data is "1".

Thus, in the maintenance department, when the maintenance work is regularly performed as described above, the ground element 3 is replaced based on these alarm data in anticipation of the train operation stop time zone such as at night. This makes it possible to operate the railway security system without lowering the operating rate of the terrestrial radio device 10 of each terrestrial element 3 or the entire security system.

(1-3) Effect of the present embodiment As described above, in the terrestrial radio device 10 of the present embodiment, the cumulative time when the output voltage of the rectifier 12 exceeds the first threshold voltage (rated voltage of the regulator 13) is accumulated. A control unit that counts the values and when the output voltage of the regulator becomes the above-mentioned second threshold voltage (greater than or equal to the rated output of the regulator 13 and the power level of the information wave emitted from the transmitting antenna 16 becomes an inappropriate value). 14 and the power supply voltage value of the power amplifier 15), the value of the overvoltage detection flag is set to "1", and the cumulative value and the value of the overvoltage detection flag are transmitted to the on-board child 4 together with the message data of the control information. do.

Therefore, according to the terrestrial wireless device 10, the current status of the electronic components / circuits in the terrestrial wireless device 10 can be estimated based on the cumulative value and the value of the overvoltage detection flag, and based on the estimation result. Therefore, the ground element 3 can be replaced before the ground radio device 10 fails. Therefore, according to the terrestrial radio device 10, it is possible to prevent a situation such as a delay or stop of train operation due to the failure of the terrestrial element 3 from occurring, and the railway including the operation of the train 2 can be prevented. It is possible to effectively prevent a decrease in the operating rate of the control security system as a whole.

(2) Second Embodiment FIG. 4 showing the corresponding portion with FIG. 2 with the same reference numerals shows the terrestrial radio device 40 according to the second embodiment. In the terrestrial wireless device 40, the memory controller 41 holds the above-mentioned cumulative value threshold value, and the life of the electronic components / circuits constituting the terrestrial wireless device 40 is extended by the thermal stress applied to the terrestrial wireless device 40. It differs from the terrestrial radio device 10 of the first embodiment in that the terrestrial radio device 40 determines whether or not it is approaching.

FIG. 5 having the same reference numerals as those corresponding to FIG. 3 shows a data map of the memory 42 according to the present embodiment. The memory 42 of the present embodiment contains a first storage area 42A for storing the cumulative value of the count value of the timer 23, a second storage area 42B for storing the overvoltage detection flag, and message data of each control information. In addition to the plurality of third storage areas 42C each stored, the fourth storage area 42D in which the above-mentioned cumulative value threshold is stored in advance, and the fifth storage area 42D in which the terrestrial radio device abnormality determination flag described later is stored are stored. It differs from the memory 21 of the first embodiment in that the storage area 42E is provided.

Then, as described above, the memory controller 41 uses the cumulative value stored in the first storage area 42A of the memory 42 in response to the request from the accumulator 24 as the latest cumulative value (hereinafter, this is referred to as the latest cumulative value). ), The cumulative value threshold stored in the fourth storage area 42D is read out. Then, the memory controller 41 compares the latest cumulative value with the cumulative value threshold value read from the fourth storage area 42D, and when the latest cumulative value becomes equal to or greater than the cumulative value threshold value, the memory controller 41 shifts to the fifth storage area 42E. Set the value of the stored terrestrial radio device abnormality determination flag to "1".

Further, when the above-mentioned overvoltage detection notification is given from the overvoltage detector 31, the memory controller 41 sets the overvoltage detection flag stored in the second storage area 42B of the memory 42 to “1”, and also sets the overvoltage detection flag to “1”. The value of the terrestrial radio device abnormality determination flag stored in the fifth storage area 42E is also set to "1".

Therefore, the terrestrial radio device abnormality determination flag stored in the fifth storage area 42E is set when the latest cumulative value calculated by the accumulator 24 is equal to or greater than the cumulative value threshold, or when the overvoltage detector 31 sets the flag. When an abnormality in the output voltage of the regulator 13 is detected, it is set to "1".

When the memory controller 41 is in operation, the value of the terrestrial radio device abnormality determination flag stored in the fifth storage area 42E of the memory 42 and the message data stored in each of the third storage areas 42C are constant. It is read out at a cycle and output to the modulator 22. Thus, the modulator 22 modulates the values of the terrestrial radio device abnormality determination flags and the respective message data together, and transmits the obtained modulated signal to the on-board element 4 as an information wave via the transmission antenna 16. ..

The on-board child 4 side demodulates the received information wave. Further, the on-board element 4 or a higher-level device thereof executes vehicle control according to the control information based on the above-mentioned telegram data obtained by the demodulation. Further, when the value of the terrestrial radio device abnormality determination flag transmitted together with the telegram data is "1", the on-board child 4 or its higher-level device is provided at the time of regular maintenance work of a predetermined maintenance department. The above-mentioned alarm data to be generated is generated. As a result, the replacement work of the ground element 3 as described above is executed based on the alarm data.

As described above, in the present embodiment, the terrestrial wireless device 40 determines whether or not the life of the electronic components / circuits constituting the terrestrial wireless device 40 is approaching due to the thermal stress applied to the terrestrial wireless device 40. Since it is performed on the side, the load on the on-board element 4 or its higher-level device can be reduced accordingly.

(3) Third Embodiment In FIG. 2, 50 indicates a terrestrial radio device according to the present embodiment as a whole. The terrestrial radio device 50 is configured in substantially the same manner as the terrestrial radio device 10 of the first embodiment except that the configuration of the voltage monitor 51 is different from that of the voltage monitor 30 of the first embodiment. ..

Here, in the voltage monitor 30 of the first embodiment, the output voltage of the rectifier 12 is compared with the preset first threshold voltage, and the output voltage of the rectifier 12 exceeds the first threshold voltage. During the period, the timer 23 was started to count the time when the output voltage of the rectifier 12 exceeded the first threshold voltage.

However, as the output voltage of the rectifier 12 is larger than the rated voltage of the regulator 13, the regulator 13 and the control unit 14 and the power amplifier 15 to which the power supply voltage is provided from the regulator 13 (hereinafter, these are appropriately combined into the regulator 13). The damage received is large, and it is not possible to accurately predict the life of the regulator 13 or the like simply by counting the time when the output voltage of the rectifier 12 exceeds the first threshold voltage.

Therefore, in the present embodiment, the voltage monitor 51 is configured so that the larger the output voltage of the rectifier 12 is, the larger the count value of the timer 23 is, even for the same time. Therefore, the regulator 13 is configured based on the count value of the timer 23. It is designed so that the life prediction such as can be accurately judged.

FIG. 6 shows a partial configuration of such a voltage monitor 51. As shown in FIG. 6, the voltage monitor 51 of the present embodiment includes first to fourth AND circuits 60A to 60D, first to fourth signal lines 61A to 61D, and first to fourth oscillators. It is configured to include 62A to 62D and an or circuit 63.

The first AND circuit 60A includes first and second non-inverting input terminals and first to third inverting input terminals. In the first AND circuit 60A, the first signal line 61A is connected to the first non-inverting input terminal, and the frequency output from the first oscillator 62A is AC to the second non-inverting input terminal. A signal is applied. Further, the second to fourth signal lines 61B to 61D are connected to the first to third inverting input terminals of the first AND circuit 60A, respectively.

Further, the second AND circuit 60B includes first and second non-inverting input terminals and first and second inverting input terminals. In the second AND circuit 60B, the second signal line 61B is connected to the first non-inverting input terminal, and the frequency output from the second oscillator 62B is AC to the second non-inverting input terminal. A signal is applied. A third signal line 61C is connected to the first inverting input terminal of the second AND circuit 60B, and a fourth signal line 61D is connected to the second inverting input terminal.

Further, the third AND circuit 60C is configured to include first and second non-inverting input terminals and inverting input terminals. In the third AND circuit 60C, the third signal line 61C is connected to the first non-inverting input terminal, and the frequency output from the third oscillator 62C is AC to the second non-inverting input terminal. A signal is applied. A fourth signal line 61D is connected to the inverting input terminal of the third AND circuit 60C.

The fourth AND circuit 60D is configured to include first and second non-inverting input terminals. In the fourth AND circuit 60D, the fourth signal line 61D is connected to the first non-inverting input terminal, and the frequency output from the fourth oscillator 62D is AC to the second non-inverting input terminal. A signal is applied.

The oscillation frequencies f1 to f4 in the first to fourth oscillators 62A to 62D are set so that f4 is the largest, then f3, then f2, and f1 is the smallest.

Further, the output ends of the first to fourth AND circuits 60A to 61D are connected to the input ends of the or circuit 63, respectively, and the output ends of the or circuit 63 are connected to the pulse input ends of the timer 23.

On the other hand, inside the voltage monitor 51, four-step threshold voltages Th ₁ , Th ₂ , Th ₃ and Th ₄ are preset as threshold voltages with respect to the output voltage of the rectifier 12. In this case, these threshold voltage _{Th 1,} Th 2, Th ₃ and Th _4, the threshold voltage Th ₄ is highest, other threshold voltage Th _3, the threshold voltage Th ₂ and the threshold voltage Th sequentially voltages at the _first order Is set to be low. The threshold voltage Th ₁ is the first signal line 61A, the threshold voltage Th ₂ is the second signal line 61B, the threshold voltage Th ₃ is the third signal line 61C, and the threshold voltage Th ₄ is the fourth signal line 61D. It is associated.

Then, in the voltage monitoring circuit 51, the output voltage of the rectifier 12 is compared with the voltage threshold _Th 1 to TH _4, respectively, the rectifier 12 output voltage all the associated low threshold voltage _Th 1 to TH ₄ than the A signal having a logic value of "H" is applied to the first to fourth signal lines 61A to 61D, respectively, and all the first to first to fourth signal lines associated with a _{threshold voltage Th 1 to Th 4 higher than the output voltage of the rectifier 12 are applied.} A signal having a logical value “L” level is applied to each of the fourth signal lines 61A to 61D.

Therefore, when the voltage value of the output voltage of the rectifier 12 _{is lower than the voltage threshold value Th 1} of the first stage, all the first to fourth AND circuits 60A to 60D maintain the off state, so that the or circuit 63 No signal is given to the timer 23 via the above, and as a result, the timer 23 does not count.

On the other hand, when the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold Th 1} of the first stage and lower than the voltage threshold Th ₂ of the second stage, only the first AND circuit 60A is turned on. .. Then, a pulse signal that rises to the logical value "H" only for a period in which the signal level of the AC signal output from the first oscillator 62A is higher than the voltage level of the logical value "H" is output from the first AND circuit 60A. This is given to the timer 23 via the or circuit 63. Thus, in the timer 23, the number of pulses of this pulse signal is sequentially counted during the period in which the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold Th 1 of the first stage and lower than the voltage threshold Th 2} of the second stage. Will be done.

When the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold Th 2} of the second stage and lower than the voltage threshold Th ₃ of the third stage, only the second AND circuit 60B is turned on. Then, a pulse signal that rises to the logical value "H" only for a period in which the signal level of the AC signal output from the second oscillator 62B is higher than the voltage level of the logical value "H" is output from the second AND circuit 60B. This is given to the timer 23 via the or circuit 63. Thus, in the timer 23, the number of pulses of this pulse signal is sequentially counted during the period when the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold Th 2 of the second stage and lower than the voltage threshold Th 3} of the third stage. Will be done.

Further, when the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold Th 3} of the third stage and lower than the voltage threshold Th ₄ of the fourth stage, only the third AND circuit 60C is turned on. Then, a pulse signal that rises to the logical value "H" only for a period in which the signal level of the AC signal output from the third oscillator 62C is higher than the voltage level of the logical value "H" is output from the third AND circuit 60C. This is given to the timer 23 via the or circuit 63. Thus, in the timer 23, the number of pulses of this pulse signal is sequentially counted during the period when the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold Th 3 of the third stage and lower than the voltage threshold Th 4} of the fourth stage. Will be done.

On the other hand, when the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold value Th 4} of the fourth stage, only the fourth AND circuit 60D is turned on. Then, a pulse signal that rises to the logical value "H" only for a period in which the signal level of the AC signal output from the fourth oscillator 62D is higher than the voltage level of the logical value "H" is output from the fourth AND circuit 60D. This is given to the timer 23 via the or circuit 63. Thus, in the timer 23, the number of pulses of this pulse signal is sequentially counted during the period when the voltage value of the output voltage of the rectifier 12 _{is higher than the voltage threshold value Th 4 of the fourth stage.}

As described above, in the terrestrial wireless device 50 of the present embodiment, the count value of the timer 23 increases as the voltage value of the output voltage of the rectifier 12 increases, that is, as the damage given to the regulator 13 and the like increases, even during the same period. .. Therefore, according to the present embodiment, the life of the regulator 13 and the like can be predicted with high accuracy based on the count value of the timer 23.

In this way, according to the terrestrial radio device 50 of the present embodiment, it is possible to prevent and more reliably prevent a situation such as a delay or stop of train operation due to a failure of the terrestrial element 3. Thus, it is possible to effectively prevent a decrease in the operating rate of the entire railway control security system including the operation of the train 2.

(4) Other Embodiments In the first to third embodiments described above, when the terrestrial wireless devices 10, 40, and 50 receive electric power given as electric power waves from the on-board element 4. However, the present invention is not limited to this, and the terrestrial radio devices 10, 40, and 50 may receive electric power from the outside such as the on-board child 4 by any other method.

Further, in the first to third embodiments described above, the case where the power receiving unit that receives power from the outside and outputs the received power is composed of the receiving antenna 11, the rectifier 12, and the regulator 13 will be described. However, the present invention is not limited to this, and various other configurations can be widely applied.

Further, in the first to third embodiments described above, the control units 14, 43 and the power amplifier 15 are the transmission units that operate by the electric power output from the power receiving unit and wirelessly transmit the control information to the on-board element 4. And the case where the transmission antenna 16 is used is described, but the present invention is not limited to this, and various other configurations can be widely applied.

Further, in the first to third embodiments described above, a cumulative time counting unit for counting the cumulative time when the power output from the power receiving unit exceeds a predetermined first threshold voltage is configured by ... However, the present invention is not limited to this, and the case where the voltage monitors 30 and 51, the timers 23 of the control units 14 and 43, and the accumulator 24 are used is described. The present invention is not limited to this, and various other configurations can be widely applied.

Further, in the third embodiment described above, as a means for increasing the count value of the timer 23 as the output voltage of the rectifier 12 increases even at the same time, the threshold voltage with respect to the output voltage of the rectifier 12 is set to a four-step threshold. Although the case where the voltages Th ₁ , Th ₂ , Th ₃ and Th ₄ are set is described, the present invention is not limited to this, and the threshold voltage of 2 or 3 steps or 5 steps or more is set. You may.

The present invention can be applied to ground elements used in railway control security systems.

2 ... train, 3 ... ground element, 4 ... on-board element, 10, 40, 50 ... ground radio device, 11 ... receiving antenna, 12 ... rectifier, 13 ... regulator, 14 ... control unit , 15 ... Power amplifier, 16 ... Transmit antenna, 20, 41 ... Memory controller, 21, 42 ... Memory, 22 ... Modulator, 23 ... Timer, 24 ... Accumulator, 30, 51 ... ... Voltage monitor, 31 ... Overvoltage detector, 60A-60D ... And circuit, 61A-61D ... Signal line, 62A-62D ... Antenna, 63 ... Or circuit.

Claims (10)

In a terrestrial wireless device that is installed on the ground and wirelessly transmits predetermined control information to an on-board child mounted on a train.
A power receiving unit that receives power from the outside and outputs the received power,
A transmission unit that operates by the electric power output from the power receiving unit and wirelessly transmits the control information to the on-board child.
The cumulative time counting unit that counts the cumulative time when the power output from the power receiving unit exceeds a predetermined first threshold voltage, and the power given from the power receiving unit to the transmitting unit become an overvoltage. It is equipped with at least one of the overvoltage detectors that detect that.
The transmitter
In addition to the control information, the electric power information regarding at least one of the cumulative time counted by the cumulative time counting unit and the detection result of the overvoltage detecting unit is transmitted to the on-board child. Ground radio equipment. The power receiving unit
The terrestrial wireless device according to claim 1, wherein the electric power is received as an electric power wave from the on-board element. The transmitter
In addition to the control information, at least one of the cumulative time counted by the cumulative time counting unit and the detection result of the overvoltage detecting unit is transmitted to the on-board child as the power information. The terrestrial wireless device according to claim 1. The transmitter
The power output from the power receiving unit holds the threshold value of the cumulative time when the power exceeds the first threshold voltage.
The ground surface according to claim 1, wherein when the cumulative time exceeds the threshold value, information indicating that the cumulative time exceeds the threshold value is transmitted to the on-board child as the electric power information. Wireless device. The cumulative time counting unit
The terrestrial wireless device according to claim 1, wherein the cumulative time is counted so that the count value increases as the output power of the power receiving unit increases even at the same time. In the control method of a terrestrial wireless device that is installed on the ground and wirelessly transmits predetermined control information to an on-board child mounted on a train.
The terrestrial radio device
A power receiving unit that receives power from the outside and outputs the received power,
It has a transmitting unit that operates by the electric power output from the power receiving unit and wirelessly transmits the control information to the on-board child.
The cumulative time when the power output from the power receiving unit exceeds a predetermined first threshold voltage is counted, and / or the power given from the power receiving unit to the transmitting unit has become an overvoltage. The first step to detect and
In addition to the control information, the power receiving unit counts the cumulative time when the power output from the power receiving unit exceeds the first threshold voltage, and the power receiving unit gives the power receiving unit to the transmitting unit. A control method for a terrestrial radio device, comprising: a second step of transmitting electric power information regarding at least one of a detection result for an overvoltage of electric power to the on-board child. The power receiving unit
The control method for a terrestrial wireless device according to claim 6, wherein the electric power is received as an electric power wave from the on-board element. In the second step, the transmitter is
In addition to the control information, the count result of the cumulative time when the power output from the power receiving unit exceeds the first threshold voltage and the power given from the power receiving unit to the transmitting unit become an overvoltage. The control method for a terrestrial wireless device according to claim 6, wherein at least one of the detection results for the above is transmitted as the electric power information to the on-board child. The transmitter
The power output from the power receiving unit holds the threshold value of the cumulative time when the power exceeds the first threshold voltage.
In the second step, the transmitter is
The ground according to claim 6, wherein when the cumulative time exceeds the threshold value, information indicating that the cumulative time exceeds the threshold value is transmitted to the on-board child as the electric power information. How to control the wireless device. In the first step,
The control method for a terrestrial wireless device according to claim 6, wherein the cumulative time is counted so that the count value increases as the output power of the power receiving unit increases even at the same time.

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