JP3004985B1 - Point control type signal sorting device - Google Patents

Abstract

Abstract: [PROBLEMS] To increase the amount of information for controlling a train with a simple configuration, and to improve equipment adjustment work and noise resistance. When a vehicle armature (3) electromagnetically couples with a ground armature having a resonance frequency (fi) to resonate, a frequency sweep signal of a frequency (f0 to fn) output from a secondary coil of the vehicle armature (3) has a frequency fi. The signal level increases. Phase discrimination circuit 5
1 demodulates a frequency sweep signal sent from the secondary coil of the upper armature 3 and outputs a demodulated signal of a frequency fi. The band pass filter 52 removes a noise component of the demodulated signal. The DC voltage conversion circuit 53 converts the demodulated signal from which noise components have been removed into a DC voltage corresponding to the frequency fi. The arithmetic circuit 54 determines the level of the DC voltage and the value of the frequency counter to select the ground terminal 2 having the resonance frequency fi.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a point control type signal selection device using a grounding element used for various controls such as a train stop control and a railroad crossing control, and more particularly to simplification of the configuration of an on-board device. .

[0002]

2. Description of the Related Art As an automatic train stopping device, as shown in FIG. 4, an oscillation circuit having a constant oscillation frequency f is provided as an on-board device by an amplifier 6 having a coil of an on-board member 3 as a feedback circuit. Is provided with a grounding element 2 composed of a resonance circuit having a constant frequency f1.
When passing over the train, the constant oscillation frequency f of the oscillation circuit fluctuates to the frequency f1 of the resonance circuit set on the grounding element 2 and issues a stop command to the train. The ATS-S type which stops a train by emergency braking is widely put into practical use. Further, a method using a fast Fourier transform has been developed as a method for detecting a ground child.

[0003]

In the above-mentioned conventional variable-speed automatic train stop device, in order to increase the amount of information for controlling the train, a frequency selector is attached to each frequency corresponding to the information to reduce the frequency. We needed to increase it. However, if a frequency selector is attached for each frequency, it is difficult to reduce the size of the automatic train stopping device, and it is also difficult to adjust the equipment and improve the noise resistance.

Further, in order to detect a ground child using the high-speed Fourier transform, it is necessary to perform high-speed calculations because the time during which the running train and the ground child are coupled is short.
It was difficult to realize with a simple configuration.

The present invention has been made in order to improve such disadvantages, and it is possible to increase the amount of information for controlling a train with a simple configuration, and at the same time, it is possible to adjust equipment and improve noise resistance. It is an object of the present invention to provide a control-type signal sorting device.

[0006]

According to the present invention, there is provided a point-controlled signal selection device including an on-board device and a grounding element, the on-board device includes an on-board element, a modulation section and a demodulation section, The unit has a programmable counter, a signal conversion circuit, and a power amplifier. The programmable counter sequentially outputs pulses of frequencies f0 to fn at a fixed period, and the signal conversion circuit outputs pulses of frequencies f0 to fn output from the programmable counter at frequency f0. Ｆfn, the power amplifier amplifies the frequency sweep signal output from the signal conversion circuit, and outputs the amplified signal to the upper part of the vehicle. The demodulation unit includes a phase discrimination circuit, a band-pass filter, a DC voltage conversion circuit, Having an arithmetic circuit,
The phase discrimination circuit demodulates the output signal of the vehicle upper part using the frequency sweep signal output from the signal conversion circuit of the modulation unit, and the bandpass filter removes noise components from the demodulated signal output from the phase discrimination circuit. The DC voltage conversion circuit converts the demodulated signal output from the band-pass filter into a DC voltage, the arithmetic circuit determines the level of the DC voltage signal output from the DC conversion circuit, and the vehicle arm is electromagnetically coupled with the ground arm. In some cases, the resonance frequency of the electromagnetically coupled ground element is selected.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This point control type signal sorting device has an on-board device mounted on a train and a grounding member installed on the ground. The on-board device has an on-board element, a modulating unit, and a demodulating unit.
The upper armature is electromagnetically coupled with the ground arm as the train travels. The modulation unit has a programmable counter, a signal conversion circuit, and a power amplifier, and outputs pulses of frequencies f0 to fn sequentially output from the programmable counter at a constant frequency to the frequency f.
The signal is converted from 0 to a frequency sweep signal having a frequency fn and output to the vehicle upper child. The demodulation unit has a phase discrimination circuit, a band-pass filter, a DC voltage conversion circuit, and an arithmetic circuit, and demodulates and demodulates the output signal of the vehicle body using the frequency sweep signal of the frequency f0 to fn created by the modulation unit. The converted signal is converted to a DC voltage and its level is determined.

The programmable counter of the modulating unit of the on-board device configured as described above always outputs pulse signals of frequencies f0 to fn in a fixed cycle, and the signal converting unit outputs the frequency f0 output from the programmable counter. ~ Fn
Is converted into a frequency sweep signal having frequencies f0 to fn. The power amplifier amplifies the frequency sweep signal output from the signal conversion circuit and sends the amplified signal to the primary coil of the vehicle. The phase discrimination circuit of the demodulation unit demodulates the output signal from the secondary coil of the vehicle upper part using the frequency sweep signal output from the signal conversion circuit. The demodulated signal output from the phase discrimination circuit has a constant voltage when the train has not reached the position of the ground.

[0009] In this state, the train advances, and the upper armature is electromagnetically coupled with, for example, the ground arm having the resonance frequency fi, and resonates.
Of the frequency sweep signal, the signal level of the frequency fi increases. The phase discriminating circuit demodulates the frequency sweep signal having the increased signal level of the frequency fi sent from the secondary coil of the vehicle, and outputs a demodulated signal of the frequency fi. The band-pass filter removes noise components of the demodulated signal and sends the signal to the DC voltage conversion circuit. The DC voltage conversion circuit converts the transmitted demodulated signal into a DC voltage according to the frequency fi. The level of the DC voltage and the value of the frequency counter are determined by an arithmetic circuit to select a ground terminal having a resonance frequency fi.

[0010]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. As shown in the figure, the point control type signal sorting device has an on-board device 1 mounted on a train and a ground child 2 installed on the ground. The on-vehicle device 1 has an on-vehicle child 3, a modulator 4, and a demodulator 5. The upper armature 3 is electromagnetically coupled with the ground armature 2 as the train travels. The modulation unit 4 outputs a frequency sweep signal having a frequency f0 to a frequency fn at a constant period, and includes a programmable counter 41, a signal conversion circuit 42 including a low-pass filter, a power amplifier 43, and a frequency counter 44. Programmable counter 4
Numeral 1 sequentially outputs pulses of frequencies f0 to fn at a constant cycle. The signal conversion circuit 42 converts the pulses of the frequencies f0 to fn output from the programmable counter 41 to the frequencies f0 to fn.
The signal is converted into an n frequency sweep signal and output. The power amplifier 43 amplifies the frequency sweep signal output from the signal conversion circuit 42 and outputs the amplified signal to the upper child 3. The frequency counter 44 counts the pulses of the frequencies f0 to fn output from the programmable counter 41 and outputs them to the demodulation unit 5. The demodulation unit 5 demodulates the output signal of the upper armature 3 using the frequency sweep signals of the frequencies f0 to fn created by the modulation unit 4,
It converts the demodulated signal into a DC voltage and determines the level thereof, and includes a phase discrimination circuit 51, a band-pass filter 52, a DC voltage conversion circuit 53, and an arithmetic circuit 54. The phase discrimination circuit 51 demodulates and outputs the output signal of the upper armature 3 using the frequency sweep signal output from the signal conversion circuit 42 of the modulation unit 4. Bandpass filter 52
Removes noise components from the demodulated signal output from the phase discrimination circuit 51. The DC voltage conversion circuit 53 converts the demodulated signal output from the band pass filter 52 into a DC voltage and outputs the DC voltage. The arithmetic circuit 54 determines the level of the DC voltage signal output from the DC conversion circuit 53 and the value of the frequency counter 44, and the frequency of the waveform output from the programmable counter 41 has a constant cycle and resolution based on the count value output from the frequency counter 44. To control the programmable counter 41 to sweep.

The programmable counter 41 of the modulating unit 4 of the on-board device 1 configured as described above always outputs pulse signals of frequencies f0 to fn at regular intervals T as shown in the waveform diagram of FIG. ing. The signal conversion unit 42 outputs the frequencies f0 to fn output from the programmable counter 41.
Is converted into a frequency sweep signal having frequencies f0 to fn and output. The power amplifier 43 is a signal conversion circuit 4
2 is amplified and sent to the primary coil of the upper armature 3. Phase discrimination circuit 51 of demodulation unit 5
Demodulates the signal output from the secondary coil of the upper armature 3 using the frequency sweep signal output from the signal conversion circuit 42. The demodulated signal output from the phase discriminating circuit 51 has a constant voltage when the train has not reached the position of the ground child 2.

In this state, the train advances, and the upper armature 3 is electromagnetically coupled with, for example, the ground arm 2 having the resonance frequency fi and resonates. When the upper armature 3 resonates, the frequency f output from the secondary coil of the upper armature 3 becomes higher.
Among the frequency sweep signals of 0 to fn, the signal level of the frequency fi increases. The phase discrimination circuit 51 is connected to the vehicle
The frequency sweep signal transmitted from the secondary coil and having the increased signal level of the frequency fi is demodulated using the frequency sweep signal output from the signal conversion circuit 42, and as shown in the waveform diagram of FIG. Output the demodulated signal. The demodulated signal of the frequency fi is sent to the DC voltage conversion circuit 53 via the band-pass filter 52, and the DC voltage conversion circuit 53 converts the demodulated signal into a DC voltage corresponding to the frequency fi. The level of the DC voltage and the value of the frequency counter 44 are determined by the arithmetic circuit 54 to select the ground terminal 2 having the resonance frequency fi.

In this manner, information from the ground terminal 2 having a resonance frequency corresponding to the frequencies f0 to fn of the frequency sweep signal output from the modulation section 4 can be received, and the amount of information for controlling the train can be reduced. Can be significantly increased.

[0014]

As described above, according to the present invention, a frequency sweep signal having a frequency of f0 to fn is transmitted to a vehicle child, and the vehicle child is electromagnetically coupled with a ground child, and the frequency sweep signal having a frequency of f0 to fn is output. Since the resonance frequency of the grounding element is selected from the frequency that oscillated at the resonance frequency of the grounding element and increased, it is possible to receive information of the amount of information according to the frequency sweep signal sent to the vehicle upper part Thus, the amount of information for controlling the train can be greatly increased.

Further, since it is only necessary to add a modulating unit and a demodulating unit to the on-board device, it is possible to reduce the size of the device and to improve equipment adjustment work and noise resistance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a waveform diagram showing an operation of the on-board device when the vehicle is not connected to a grounding element.

FIG. 3 is a waveform diagram showing an operation of the on-board device when the vehicle is connected to a grounding element.

FIG. 4 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 On-board apparatus 2 Ground element 3 On-board element 4 Modulation unit 5 Demodulation unit 41 Programmable counter 42 Signal conversion circuit 43 Power amplifier 44 Frequency counter 51 Phase discrimination circuit 52 Bandpass filter 53 DC voltage conversion circuit 54 Operation circuit

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B61L 1/00-23/34

Claims (1)

(57) [Claims] An on-board device has an on-board device, a modulator and a demodulator, the modulator has a programmable counter, a signal conversion circuit, and a power amplifier, and is programmable. The counter has a frequency f0
fn pulses are sequentially output at a constant cycle, and the signal conversion circuit outputs frequencies f0 to fn output from the programmable counter.
Is converted to a frequency sweep signal having a frequency of f0 to fn, the power amplifier amplifies the frequency sweep signal output from the signal conversion circuit and outputs the amplified signal to the vehicle upper body, and the demodulation section includes a phase discrimination circuit, a bandpass filter, and the like. It has a DC voltage conversion circuit and an arithmetic circuit, and the phase discrimination circuit demodulates the output signal of the vehicle upper part using the frequency sweep signal output from the signal conversion circuit of the modulation unit, and the band pass filter outputs A noise component is removed from the output demodulated signal, a DC voltage conversion circuit converts the demodulated signal output from the bandpass filter into a DC voltage, and an arithmetic circuit determines the level of the DC voltage signal output from the DC conversion circuit. ,
A point control type signal selection device, wherein when a vehicle arm is electromagnetically coupled to a ground arm, the resonance frequency of the electromagnetically ground arm is selected.