JP2895026B2 - Point control type signal sorting device - Google Patents
Point control type signal sorting deviceInfo
- Publication number
- JP2895026B2 JP2895026B2 JP17784497A JP17784497A JP2895026B2 JP 2895026 B2 JP2895026 B2 JP 2895026B2 JP 17784497 A JP17784497 A JP 17784497A JP 17784497 A JP17784497 A JP 17784497A JP 2895026 B2 JP2895026 B2 JP 2895026B2
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- JP
- Japan
- Prior art keywords
- signal
- synchronous detection
- circuit
- reference signal
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Train Traffic Observation, Control, And Security (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、列車の停止制御
や踏切制御等の各種制御に使用される地上子を使用した
点制御式信号選別装置、特に車上装置の構成の簡略化に
関するものである。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 level crossing control, and more particularly to a simplification of the configuration of an on-board device. is there.
【０００２】[0002]
【従来の技術】自動列車停止装置としては、図３に示す
ように、車上装置として車上子３のコイルを帰還回路と
した増幅器２２による常時発振周波数ｆの発振回路部２
１を設け、地上装置には一定周波数ｆ0の共振回路から
なる地上子１を設け、走行している列車の車上子３が地
上子１の上を通るときに、発振回路部２１の常時発振周
波数ｆが地上子に設定された共振回路の周波数ｆ0に変
周して、列車に停止指令を出し、一定時間以内に確認扱
いをしないときには、自動的に非常ブレ−キにより列車
を停止させるＡＴＳ−Ｓ形が広く実用化されている。ま
た、地上子を検出する方法として高速フ−リエ変換を用
いた方法も開発されている。2. Description of the Related Art As an automatic train stopping apparatus, as shown in FIG. 3, an oscillation circuit section 2 having a constant oscillation frequency f by an amplifier 22 having a coil of an upper armature 3 as a feedback circuit as an onboard apparatus.
The ground device is provided with a grounding element 1 comprising a resonance circuit having a constant frequency f 0 , and when the vehicle armature 3 of the running train passes over the grounding element 1, the oscillation circuit 21 and Edit the frequency f 0 of the resonant circuit oscillation frequency f is set to the ground element, issues a stop command to the train, when no confirmation handled within a predetermined time, automatically emergency blur - stop train by key ATS-S type is widely used. Further, a method using a fast Fourier transform has been developed as a method for detecting a ground child.
【０００３】また、地上子の共振周波数に対応した信号
を車上子から送信する方法も採用されている。この方法
の場合、地上子の共振周波数には製造上の誤差や経年変
化による許容変動範囲があるため、車上子からの送信信
号に対して地上子の共振周波数にずれが生じると、中心
周波数を半値幅で割った地上子の共振の尖鋭度に応じて
車上子の２次側コイルに誘起する信号の大きさが低下す
る。その影響を軽減するために地上子の共振周波数の許
容変動範囲の限界を規制する２つの周波数を加算して対
応している。また、車上子の送信信号と地上子の共振周
波数のずれの度合いにより車上子の２次側コイルに誘起
する信号と送信信号との位相が変化するので、位相の変
化に選らずに振幅を求めるために１つの周波数に対して
２組の同期検波回路を使用している。この地上子の共振
周波数の許容変動範囲を例えば±２ｋＨｚとし、地上子
の共振周波数ｆ0＝(100±２)ｋＨｚとした場合、図４に
示すように、車上装置の信号発生器３１の発振回路３２
ａから出力した地上子１の共振周波数の許容変動範囲の
限界を規制する99ｋＨｚの信号と発振回路３２ｂから出
力した101ｋＨｚの信号を加算回路３３で加算し、加算
した信号を電力増幅回路３４で増幅して車上子３の１次
側コイルに入力する。発振回路３２ａから出力した99ｋ
Ｈｚの信号は２つの同期検波回路３５ａ，３５ｂに入力
し、発振回路３２ｂから出力した101ｋＨｚの信号は２
つの同期検波回路３５ｃ，３５ｄに入力している。同期
検波回路３５ａは99ｋＨｚの信号を０度シフタ３７を介
して乗算器３６に参照信号として入力し、同期検波回路
３５ｂは99ｋＨｚの信号を９０度シフタ３８を介して乗
算器３６に参照信号として入力している。同期検波回路
３５ｃは101ｋＨｚの信号を０度シフタ３７を介して乗
算器３６に参照信号として入力し、同期検波回路３５ｄ
は101ｋＨｚの信号を９０度シフタ３８を介して乗算器
３６に参照信号として入力している。この状態で車上子
３が共振周波数ｆ0＝(100±２)ｋＨｚと電磁結合して共
振し、発生した発振出力を２次側コイルから各同期検波
回路３５ａ〜３５ｄの乗算器３６に信号入力として送
る。各同期検波回路３５ａ〜３５ｄの乗算器３６は送ら
れた共振周波数ｆ0の信号を参照信号で同期検波して検
波出力を演算回路に送る。演算回路３９は入力した検波
出力信号から振幅成分と位相成分を演算して出力する。
このようにして共振周波数の許容変動範囲98ｋＨｚ〜10
2ｋＨｚの地上子１の信号を確実に選別するようにして
いる。Further, a method of transmitting a signal corresponding to the resonance frequency of a ground child from a vehicle child is also adopted. In the case of this method, since the resonance frequency of the grounding element has an allowable variation range due to manufacturing errors and aging, if the resonance frequency of the grounding element is shifted with respect to the transmission signal from the vehicle element, the center frequency is changed. Is divided by the half-value width, and the magnitude of the signal induced in the secondary coil of the vehicle child decreases according to the sharpness of the resonance of the ground child. In order to reduce the influence, two frequencies that regulate the limit of the allowable variation range of the resonance frequency of the grounding element are added and corresponded. Also, since the phase of the signal induced in the secondary coil of the vehicle and the transmission signal changes depending on the degree of deviation between the transmission signal of the vehicle and the resonance frequency of the ground, the amplitude is selected regardless of the phase change. In order to obtain the following equation, two sets of synchronous detection circuits are used for one frequency. If the allowable variation range of the resonance frequency of the grounding element is, for example, ± 2 kHz and the resonance frequency f 0 of the grounding element is (100 ± 2) kHz, as shown in FIG. Oscillation circuit 32
The signal of 99 kHz that regulates the limit of the allowable variation range of the resonance frequency of the ground element 1 output from the signal a and the signal of 101 kHz output from the oscillation circuit 32 b are added by the addition circuit 33, and the added signal is amplified by the power amplification circuit 34. And input to the primary coil of the upper armature 3. 99k output from oscillation circuit 32a
Hz signal is input to the two synchronous detection circuits 35a and 35b, and the 101 kHz signal output from the oscillation circuit 32b is 2 kHz.
Are input to two synchronous detection circuits 35c and 35d. The synchronous detection circuit 35a inputs a 99 kHz signal as a reference signal to a multiplier 36 via a 0-degree shifter 37, and the synchronous detection circuit 35b inputs a 99 kHz signal as a reference signal to the multiplier 36 via a 90-degree shifter 38. doing. The synchronous detection circuit 35c inputs the 101 kHz signal as a reference signal to the multiplier 36 via the 0-degree shifter 37, and outputs the signal to the synchronous detection circuit 35d.
Inputs a 101 kHz signal to a multiplier 36 as a reference signal via a 90-degree shifter 38. In this state, the upper armature 3 is electromagnetically coupled with the resonance frequency f 0 = (100 ± 2) kHz to resonate, and the generated oscillation output is sent from the secondary coil to the multipliers 36 of the synchronous detection circuits 35a to 35d. Send as input. Multipliers 36 of each synchronous detection circuit 35a~35d are synchronously detects the reference signal a signal of the resonance frequency f 0 sent sent to the arithmetic circuit a detection output. The arithmetic circuit 39 calculates an amplitude component and a phase component from the input detection output signal and outputs the result.
Thus, the allowable variation range of the resonance frequency is 98 kHz to 10
The signal of the ground element 1 of 2 kHz is surely selected.
【０００４】[0004]
【発明が解決しようとする課題】上記自動列車停止装置
は車上装置の発振回路部が一般の増幅回路と車上子の２
つのコイルによる帰還回路との組合せであるため、広範
囲の周波数の地上子に対応させることが困難であった。
また、外部からのノイズにより妨害を受けやすいという
短所もあった。In the above automatic train stopping device, the oscillation circuit of the on-board device is composed of a general amplification circuit and an on-board device.
Since this is a combination with a feedback circuit using two coils, it has been difficult to cope with a ground element having a wide range of frequencies.
In addition, there is a disadvantage in that it is easily disturbed by external noise.
【０００５】また、高速フ−リエ変換を用いて地上子を
検出するためには、走行している列車と地上子とが結合
している時間が短いため高速な演算を行う必要があり、
簡単な構成で実現することは困難であった。Further, in order to detect the ground child using the high-speed Fourier transform, it is necessary to perform high-speed calculations because the time when the running train and the ground child are coupled is short.
It was difficult to realize with a simple configuration.
【０００６】地上子の共振周波数の許容変動範囲内の変
動の影響を軽減するために地上子の共振周波数の許容変
動範囲の限界を規制する２つの周波数を加算して対応
し、かつ１つの周波数に対して２組の同期検波回路を使
用していると、１つの地上子に対して同期検波回路を４
組必要となり、車上装置の機器構成が複雑になってしま
う。In order to reduce the influence of the fluctuation of the resonance frequency of the grounding element within the allowable fluctuation range, two frequencies regulating the limit of the allowable fluctuation range of the resonance frequency of the grounding element are added and corresponded, and one frequency is added. If two sets of synchronous detection circuits are used for a single ground antenna, four synchronous detection circuits are used.
A pair is required, and the equipment configuration of the on-board device becomes complicated.
【０００７】この発明はかかる短所を改善するためにな
されたものであり、異なる周波数の地上子に簡単に対応
することができるとともに外部の電磁雑音にたいしても
影響を受けずに、かつ簡単な機器構成で地上子の共振周
波数の許容変動範囲内の変動の影響を軽減することがで
きる点制御式信号選別装置を得ることを目的とするもの
である。SUMMARY OF THE INVENTION The present invention has been made in order to improve such disadvantages, and can easily cope with grounds of different frequencies, and is not affected by external electromagnetic noise, and has a simple device configuration. Accordingly, it is an object of the present invention to provide a point-controlled signal selection device capable of reducing the influence of the fluctuation of the resonance frequency of the ground element within an allowable fluctuation range.
【０００８】[0008]
【課題を解決するための手段】この発明に係る点制御式
信号選別装置は、地上装置と車上装置とを有し、地上装
置は複数の地上子を有し、各地上子は異なる周波数の共
振回路からなり、車上装置は車上子（３）と信号発生部
（４）と電力増幅回路（５）と同期検波部（６）と演算
部（７）を有し、車上子（３）は１次側コイルと２次側
コイルを有し、列車が走行するにしたがって地上子と電
磁結合し、信号発生部（４）は各地上子の共振周波数の
許容変動範囲を一定の周期で掃引した周波数の波形を示
す参照信号と、各参照信号を加算した送信信号と、掃引
する一定の周期に同期した波形を示す参照信号Ｄ１及び
掃引する一定の周期に同期した波形を示す参照信号Ｄ１
と90度の位相差を有する波形を示す参照信号Ｄ２を生成
し、電力増幅回路（５）は信号発生部（４）から出力す
る送信信号を増幅して車上子（３）の１次側コイルに送
り、同期検波部（６）は各地上子の共振周波数に対応し
た３組の同期検波回路（６１、６２、６３）を有し、初
段の同期検波回路（６１）は車上子（３）の２次側コイ
ルからの信号と対応する地上子の共振周波数に応じて生
成した参照信号を入力して同期検波し、後段の一方の同
期検波回路（６２）は初段の同期検波回路（６１）の検
波信号と信号発生部（４）で生成した掃引する一定の周
期に同期した波形を示す参照信号Ｄ１とを入力して同期
検波し、後段の他方の同期検波回路（６３）は初段の同
期検波回路（６１）の検波信号と信号発生部（４）で生
成した掃引する一定の周期に同期した波形を示す参照信
号Ｄ１と90度の位相差を有する波形を示す参照信号Ｄ２
とを入力して同期検波し、演算回路（７）は後段の各同
期検波回路（６２、６３）からの検波出力から地上子の
信号を選別することを特徴とする。SUMMARY OF THE INVENTION A point control type signal sorting apparatus according to the present invention has a ground unit and an on-board unit, the ground unit has a plurality of ground units, and each ground unit has a different frequency. The on-vehicle device includes a resonance circuit, and has an on-board element (3), a signal generation section (4), a power amplification circuit (5), a synchronous detection section (6), and a calculation section (7). 3) has a primary side coil and a secondary side coil, and is electromagnetically coupled with the grounding element as the train travels, and the signal generation unit (4) sets the allowable variation range of the resonance frequency of each grounding element at a constant cycle. A reference signal indicating the waveform of the frequency swept in the above, a transmission signal obtained by adding each reference signal, a reference signal D1 indicating a waveform synchronized with a fixed cycle to be swept, and a reference signal indicating a waveform synchronized with a fixed cycle to be swept D1
And a reference signal D2 having a waveform having a phase difference of 90 degrees, and the power amplifier circuit (5) amplifies the transmission signal output from the signal generation unit (4) to the primary side of the vehicle arm (3). The synchronous detection section (6) has three sets of synchronous detection circuits (61, 62, 63) corresponding to the resonance frequencies of the ground elements, and the first-stage synchronous detection circuit (61) has an on-board element (61). 3) The signal from the secondary side coil and the reference signal generated in accordance with the resonance frequency of the grounding element corresponding to the signal are input and synchronously detected. One of the synchronous detection circuits (62) in the subsequent stage is a synchronous detection circuit (62) in the first stage. 61) and the reference signal D1, which is generated by the signal generator (4) and indicates a waveform synchronized with a fixed period to be swept, is inputted and synchronously detected, and the other synchronous detection circuit (63) at the subsequent stage is connected to the first stage. The detection signal of the synchronous detection circuit (61) and the sweep signal generated by the signal generation unit (4) Reference signal the reference signal D1 to the period of indicating the synchronization waveform and shows a waveform having a phase difference of 90 degrees D2
And a synchronous detection circuit, and the arithmetic circuit (7) selects a ground signal from a detection output from each of the subsequent synchronous detection circuits (62, 63).
【０００９】[0009]
【発明の実施の形態】この発明の点制御式信号選別装置
は地上装置として異なる周波数ｆ1，ｆ2の共振回路から
なる地上子（１ａ），（１ｂ）と列車に搭載された車上
装置とを有する。地上子（１ａ）の共振周波数ｆ1は例
えば(100±２)ｋＨｚに設定され、地上子（１ｂ）の共
振周波数ｆ2は例えば(108±２)ｋＨｚに設定されてい
る。車上装置（２）は車上子（３）と信号発生部（４）
と電力増幅回路（５）と同期検波部（６）と演算部
（７）を有する。DETAILED DESCRIPTION OF THE INVENTION controlled signal sorting device feature of this invention consists of the resonant circuit of different frequencies f 1, f 2 as ground apparatus ground coil (1a), (1b) and on-board equipment mounted on the train And The resonance frequency f 1 of the ground coil (1a) is set to, for example, (100 ± 2) kHz, the resonant frequency f 2 of the ground coil (1b) is set to, for example, (108 ± 2) kHz. The on-board device (2) is composed of an on-board child (3) and a signal generator (4)
And a power amplification circuit (5), a synchronous detection unit (6), and a calculation unit (7).
【００１０】信号発生器（４）は鋸波発振回路（４１）
と２組の電圧制御発振回路（４２ａ），（４２ｂ）と加
算回路（４３）と波形整形回路（４４）及び移相回路
（４５）を有し、地上子（１ａ）の共振周波数ｆ1＝100
ｋＨｚの変動範囲である98ｋＨｚ〜102ｋＨｚを鋸波の
周期で掃引した参照信号Ａと地上子１ｂの共振周波数ｆ
2＝108ｋＨｚの変動範囲である106ｋＨｚ〜110ｋＨｚを
鋸波の周期で掃引した参照信号Ｂを加算した送信信号Ｃ
を電力増幅回路（５）に常時出力し、２組の電圧制御発
振回路（４２ａ），（４２ｂ）で生成した参照信号Ａ，
Ｂと波形整形回路（４４）で生成した参照信号Ｄ１及び
移相回路（４５）で反転した参照信号Ｄ２を同期検波部
（６）に常時出力している。電力増幅回路（５）は入力
した送信信号Ｃを増幅して車上子（３）の１次側コイル
に送る。この状態で列車が共振周波数ｆ1＝(100±２)ｋ
Ｈｚの地上子（１ａ）の位置に達すると、車上子（３）
は共振周波数ｆ1＝(100±２)ｋＨｚの地上子（１ａ）と
電磁結合して共振し、発生した98ｋＨｚ〜102ｋＨｚの
周波数範囲の発振出力を２次側コイルから同期検波回路
（６１ａ），（６１ｂ）に信号入力として送る。地上子
（１ａ）の共振周波数ｆ1に対応した同期検波回路（６
１ａ）は車上子（３）の２次側コイルからの発振出力を
参照信号Ａで同期検波して直流信号に掃引周波数の交流
信号を加えた周波数の低い検波信号を同期検波回路（６
２ａ），（６３ａ）に出力する。同期検波回路（６２
ａ）は送られた検波信号を波形整形回路（４４）で生成
した参照信号Ｄ１で同期検波し、同期検波回路（６３
ａ）は送られた検波信号を移相回路４５で生成し参照信
号Ｄ１と90度移相が異なる参照信号Ｄ２で同期検波して
直流信号の検波信号を演算回路（７）に送る。一方、地
上子（１ｂ）の共振周波数ｆ2に対応して106ｋＨｚ〜11
0ｋＨｚを掃引した参照信号Ｂが入力している同期検波
回路（６１ｂ）からは直流信号の検波信号が出力され、
同期検波回路（６２ｂ），（６３ｂ）からは演算回路
（７）に０Ｖの信号が送られている。そこで演算回路７
は各同期検波回路（６２，６３）から送られる検波信号
により共振周波数ｆ1の地上子１ａを選別する。The signal generator (4) is a sawtooth oscillation circuit (41)
And two sets of voltage controlled oscillation circuits (42a) and (42b), an addition circuit (43), a waveform shaping circuit (44) and a phase shift circuit (45), and the resonance frequency f 1 of the ground element (1a) = 100
A reference signal A obtained by sweeping a fluctuation range of 98 kHz to 102 kHz at a cycle of a sawtooth wave and a resonance frequency f of the ground element 1b.
2 = Transmission signal C to which reference signal B obtained by sweeping 106 kHz to 110 kHz, which is a fluctuation range of 108 kHz, at a sawtooth cycle is added.
Is constantly output to the power amplifier circuit (5), and the reference signal A, which is generated by the two voltage-controlled oscillator circuits (42a) and (42b),
B and the reference signal D1 generated by the waveform shaping circuit (44) and the reference signal D2 inverted by the phase shift circuit (45) are constantly output to the synchronous detector (6). The power amplification circuit (5) amplifies the input transmission signal C and sends it to the primary coil of the vehicle upper body (3). In this state, the train has a resonance frequency f 1 = (100 ± 2) k
When the vehicle reaches the position of the ground child (1a) in Hz, the vehicle upper child (3)
Is electromagnetically coupled with the ground element (1a) having a resonance frequency f 1 = (100 ± 2) kHz and resonates. The generated oscillation output in the frequency range of 98 kHz to 102 kHz is output from the secondary coil to the synchronous detection circuit (61a), (61b) as a signal input. Synchronous detection circuit corresponding to the resonance frequency f 1 of the ground coil (1a) (6
1a) synchronously detects the oscillation output from the secondary coil of the upper armature (3) with the reference signal A, and converts a low frequency detection signal obtained by adding an AC signal having a sweep frequency to a DC signal to a synchronous detection circuit (6).
2a) and (63a). Synchronous detection circuit (62
a) synchronously detects the sent detection signal with the reference signal D1 generated by the waveform shaping circuit (44), and performs synchronous detection on the synchronous detection circuit (63).
In a), the transmitted detection signal is generated by a phase shift circuit 45, synchronously detected by a reference signal D2 having a 90-degree phase shift different from that of the reference signal D1, and a detection signal of a DC signal is sent to an arithmetic circuit (7). On the other hand, corresponding to the resonance frequency f 2 of the ground coil (1b) 106kHz~11
A detection signal of a DC signal is output from the synchronous detection circuit (61b) to which the reference signal B sweeping 0 kHz is input,
A signal of 0 V is sent from the synchronous detection circuits (62b) and (63b) to the arithmetic circuit (7). Therefore, the arithmetic circuit 7
The sorting balise 1a of the resonance frequency f 1 by the detection signal sent from the synchronous detection circuit (62, 63).
【００１１】[0011]
【実施例】図１はこの発明の一実施例の構成を示すブロ
ック図である。図に示すように、点制御式信号選別装置
は、地上装置として異なる周波数ｆ1，ｆ2の共振回路か
らなる地上子１ａ，１ｂと列車に搭載された車上装置２
とを有する。地上子１ａの共振周波数ｆ1は例えば(100
±２)ｋＨｚに設定され、地上子１ｂの共振周波数ｆ2は
例えば(108±２)ｋＨｚに設定されている。ここで±２
ｋＨｚは各地上子１ａ，１ｂの製造上の誤差や経年変化
による許容変動範囲である。車上装置２は車上子３と信
号発生部４と電力増幅回路５と同期検波部６と演算部７
を有する。車上子３は１次側コイルと２次側コイルを有
し、列車が走行するにしたがって地上子１ａ，１ｂと電
磁結合する。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. As shown, the point controlled signal sorting apparatus, different frequencies f 1, the ground coil 1a consisting of the resonant circuit of the f 2, the onboard car 1b and the train unit 2 as ground apparatus
And The resonance frequency f 1 of the ground coils 1a, for example (100
± 2) are set in kHz, the resonant frequency f 2 of the ground coils 1b is set to, for example, (108 ± 2) kHz. Where ± 2
kHz is an allowable variation range due to a manufacturing error of each ground element 1a, 1b or aging. The on-board device 2 includes an on-board element 3, a signal generator 4, a power amplifier 5, a synchronous detector 6, and a calculator 7.
Having. The upper armature 3 has a primary side coil and a secondary side coil, and is electromagnetically coupled with the ground children 1a and 1b as the train travels.
【００１２】信号発生部４は鋸波発振回路４１と２組の
電圧制御発振回路４２ａ，４２ｂと加算回路４３と波形
整形回路４４及び移相回路４５を有する。鋸波発振回路
４１は、例えば掃引周波数幅ｆｓ＝１ｋＨｚの掃引用の
鋸波を発生する。２組の電圧制御発振回路４２ａ，４２
ｂは掃引用の鋸波によってその発振周波数を変化させる
ものであり、電圧制御発振回路４２ａは地上子１ａの共
振周波数ｆ1＝100ｋＨｚの変動範囲である98ｋＨｚ〜10
2ｋＨｚを掃引用の鋸波の周期で掃引した周波数の波形
の参照信号Ａを生成する。電圧制御発振回路４２ｂは地
上子１ｂの共振周波数ｆ2＝108ｋＨｚの変動範囲である
106ｋＨｚ〜110ｋＨｚを掃引用の鋸波の周期で掃引した
周波数の波形の参照信号Ｂを生成する。加算回路４３は
２組の電圧制御発振回路４２ａ，４２ｂで生成した参照
信号Ａ，Ｂを加算して送信信号Ｃとする。波形整形回路
４４は掃引用の鋸波の周期に同期した矩形波の参照信号
Ｄ１を生成し、移相回路４５は波形整形回路４４で生成
した参照信号Ｄ１と90度の位相差を有する参照信号Ｄ２
を生成する。The signal generator 4 includes a sawtooth oscillation circuit 41, two sets of voltage controlled oscillation circuits 42a and 42b, an addition circuit 43, a waveform shaping circuit 44, and a phase shift circuit 45. The sawtooth oscillation circuit 41 generates a sawtooth wave for sweeping with a sweep frequency width fs = 1 kHz, for example. Two sets of voltage controlled oscillation circuits 42a, 42
b changes the oscillation frequency by a sawtooth wave, and the voltage-controlled oscillation circuit 42a operates in a range of 98 kHz to 10 kHz, which is a fluctuation range of the resonance frequency f1 of the ground element 1a = 100 kHz.
A reference signal A having a frequency waveform obtained by sweeping 2 kHz at a cycle of a sawtooth wave for sweeping is generated. The voltage-controlled oscillation circuit 42b has a fluctuation range of the resonance frequency f 2 of the ground element 1b = 108 kHz.
A reference signal B having a waveform of a frequency obtained by sweeping 106 kHz to 110 kHz at a cycle of a sawtooth wave for reference is generated. The addition circuit 43 adds the reference signals A and B generated by the two sets of voltage controlled oscillation circuits 42a and 42b to generate a transmission signal C. The waveform shaping circuit 44 generates a reference signal D1 of a rectangular wave synchronized with the period of the sawtooth wave for sweeping, and the phase shift circuit 45 generates a reference signal having a phase difference of 90 degrees from the reference signal D1 generated by the waveform shaping circuit 44. D2
Generate
【００１３】電力増幅回路５は加算回路４３から出力す
る送信信号Ｃを増幅して車上子３の１次側コイルに送
る。同期検波部６は地上子１ａの共振周波数ｆ1に対応
した３組の同期検波回路６１ａ，６２ａ，６３ａと地上
子１ｂの共振周波数ｆ2に対応した３組の同期検波回路
６１ｂ，６２ｂ，６３ｂとを有する。地上子１ａの共振
周波数ｆ1に対応した１段目の同期検波回路６１ａは車
上子３の２次側コイルからの信号と電圧制御発振回路４
２ａで生成した参照信号Ａを乗算しフイルタを通した検
波出力を２段目の同期検波回路６２ａ，６３ａの信号入
力側に送る。同期検波回路６２ａは入力した信号と波形
整形回路４４で生成した参照信号Ｄ１を乗算しフイルタ
を通して出力する。同期検波回路６３ａは入力した信号
と移相回路４５で生成した参照信号Ｄ２を乗算しフイル
タを通して出力する。地上子１ｂの共振周波数ｆ2に対
応した１段目の同期検波回路６１ｂは車上子３の２次側
コイルからの信号と電圧制御発振回路４２ｂで生成した
参照信号Ｂを乗算しフイルタを通した検波出力を２段目
の同期検波回路６２ｂ，６３ｂの信号入力側に送る。同
期検波回路６２ｂは入力した信号と波形整形回路４４で
生成した参照信号Ｄ１を乗算しフイルタを通して出力す
る。同期検波回路６３ｂは入力した信号と移相回路４５
で生成した参照信号Ｄ２を乗算しフイルタを通して出力
する。演算回路７はＡ／Ｄ変換器とＣＰＵを有し、同期
検波回路６２ａ，６３ａ，６２ｂ，６３ｂからの検波出
力から地上子１ａ，１ｂの信号を選別する。The power amplifying circuit 5 amplifies the transmission signal C output from the adding circuit 43 and sends the amplified signal to the primary coil of the upper armature 3. 3 sets of the synchronous detection circuit 61a corresponding to the resonance frequency f 1 of the synchronous detector 6 ground element 1a, 62a, 63a and ground coil 1b three sets of the synchronous detection circuit 61b corresponding to the resonance frequency f 2 of, 62b, 63 b And Balise 1a of the resonance frequency synchronous detection circuit of the first stage corresponding to f 1 61a signals a voltage controlled oscillation circuit 4 from the secondary coil of the board coil 3
The reference signal A generated in 2a is multiplied and the detection output from the filter is sent to the signal input side of the second-stage synchronous detection circuits 62a and 63a. The synchronous detection circuit 62a multiplies the input signal by the reference signal D1 generated by the waveform shaping circuit 44 and outputs the result through a filter. The synchronous detection circuit 63a multiplies the input signal by the reference signal D2 generated by the phase shift circuit 45 and outputs the result through a filter. Balise 1b through the synchronous detection circuit 61b of the first stage corresponding to the resonance frequency f 2 multiplies the reference signal B generated with the signal and the voltage controlled oscillation circuit 42b from the secondary coil of the board coil 3 filters of The detected detection output is sent to the signal input side of the second-stage synchronous detection circuits 62b and 63b. The synchronous detection circuit 62b multiplies the input signal by the reference signal D1 generated by the waveform shaping circuit 44 and outputs the result through a filter. The synchronous detection circuit 63b is connected to the input signal and the phase shift circuit 45.
Is multiplied by the reference signal D2 generated in step (1) and output through a filter. The arithmetic circuit 7 has an A / D converter and a CPU, and selects signals of the ground terminals 1a and 1b from detection outputs from the synchronous detection circuits 62a, 63a, 62b and 63b.
【００１４】上記のように構成された車上装置２の信号
発生器４は地上子１ａの共振周波数ｆ1＝100ｋＨｚの変
動範囲である98ｋＨｚ〜102ｋＨｚを鋸波の周期で掃引
した参照信号Ａと地上子１ｂの共振周波数ｆ2＝108ｋＨ
ｚの変動範囲である106ｋＨｚ〜110ｋＨｚを鋸波の周期
で掃引した参照信号Ｂを加算した送信信号Ｃを電力増幅
回路５に常時出力し、２組の電圧制御発振回路４２ａ，
４２ｂで生成した参照信号Ａ，Ｂと波形整形回路４４で
生成した参照信号Ｄ１及び移相回路４５で反転した参照
信号Ｄ２を同期検波部６に常時出力している。電力増幅
回路５は入力した送信信号Ｃを増幅して車上子３の１次
側コイルに送る。この状態で列車が地上子１ａ，１ｂの
位置に達していないとき、周波数98ｋＨｚ〜102ｋＨｚ
を掃引した参照信号Ａを入力している同期検波回路６１
ａと周波数106ｋＨｚ〜110ｋＨｚを掃引した参照信号Ｂ
を入力している同期検波回路６１ｂからは直流信号が出
力され、同期検波回路６２ａ，６３ａ，６２ｂ，６３ｂ
からの出力信号は０Ｖになっている。列車が共振周波数
ｆ1＝(100±２)ｋＨｚの地上子１ａの位置に達すると、
98ｋＨｚ〜102ｋＨｚを掃引した参照信号Ａと106ｋＨｚ
〜110ｋＨｚを掃引した参照信号Ｂを加算した送信信号
Ｃが送られている車上子３は共振周波数ｆ1＝(100±２)
ｋＨｚの地上子１ａと電磁結合して共振し、発生した98
ｋＨｚ〜102ｋＨｚの周波数範囲の発振出力を２次側コ
イルから同期検波回路６１ａ，６１ｂに信号入力として
送る。このように車上子３が地上子１ａと電磁結合して
共振するときに、車上子３には98ｋＨｚ〜102ｋＨｚを
掃引した参照信号Ａと106ｋＨｚ〜110ｋＨｚを掃引した
参照信号Ｂを加算した送信信号Ｃが送られているから、
地上子１ａの共振周波数変動の影響を受けにくくするこ
とができる。また、信号発生器４で発振して生成した送
信信号Ｃを車上子３に送っているからインパルスノイズ
的な外部雑音に対しても安定して動作をすることができ
る。The signal generator 4 of the on-board device 2 having the above-described configuration includes a reference signal A obtained by sweeping 98 kHz to 102 kHz, which is a fluctuation range of the resonance frequency f 1 of the ground element 1a = 100 kHz, with a sawtooth cycle. Resonant frequency f 2 of ground element 1b = 108 kHz
A transmission signal C obtained by adding a reference signal B obtained by sweeping 106 kHz to 110 kHz, which is a fluctuation range of z, at a sawtooth cycle is constantly output to the power amplifier circuit 5, and two sets of voltage controlled oscillator circuits 42a,
The reference signals A and B generated at 42b, the reference signal D1 generated at the waveform shaping circuit 44, and the reference signal D2 inverted at the phase shift circuit 45 are always output to the synchronous detector 6. The power amplification circuit 5 amplifies the input transmission signal C and sends it to the primary coil of the upper armature 3. In this state, when the train has not reached the position of the ground child 1a, 1b, the frequency is 98 kHz to 102 kHz.
Detection circuit 61 receiving reference signal A obtained by sweeping
a and reference signal B swept over a frequency of 106 kHz to 110 kHz
A DC signal is output from the synchronous detection circuit 61b to which the signal is input, and the synchronous detection circuits 62a, 63a, 62b, 63b
Is 0 V. When the train reaches the position of the ground child 1a at the resonance frequency f 1 = (100 ± 2) kHz,
Reference signal A swept from 98 kHz to 102 kHz and 106 kHz
The upper armature 3 to which the transmission signal C to which the reference signal B obtained by sweeping up to 110 kHz is added is sent to the resonance frequency f 1 = (100 ± 2)
The resonance is generated by electromagnetic coupling with the ground element 1a of
An oscillation output in the frequency range of kHz to 102 kHz is sent from the secondary coil to the synchronous detection circuits 61a and 61b as a signal input. When the vehicle armature 3 is electromagnetically coupled with the ground arm 1a and resonates in this manner, the vehicle armature 3 is transmitted by adding the reference signal A swept from 98 kHz to 102 kHz and the reference signal B swept from 106 kHz to 110 kHz. Since signal C is being sent,
It is possible to reduce the influence of the resonance frequency fluctuation of the grounding element 1a. Further, since the transmission signal C generated by oscillating in the signal generator 4 is sent to the upper armature 3, it can operate stably against external noise such as impulse noise.
【００１５】地上子１ａの共振周波数ｆ1に対応した同
期検波回路６１ａは車上子３の２次側コイルからの発振
出力を周波数98ｋＨｚ〜102ｋＨｚを掃引した参照信号
Ａで同期検波して直流信号に掃引周波数ｆｓ＝１ｋＨｚ
の交流信号を加えた周波数の低い検波信号を同期検波回
路６２ａ，６３ａに出力する。同期検波回路６２ａは送
られた検波信号を波形整形回路４４で生成した参照信号
Ｄ１で同期検波し、同期検波回路６３ａは送られた検波
信号を移相回路４５で生成した参照信号Ｄ２で同期検波
して直流信号の検波信号を演算回路７に送る。一方、地
上子１ｂの共振周波数ｆ2に対応して106ｋＨｚ〜110ｋ
Ｈｚを掃引した参照信号Ｂが入力している同期検波回路
６１ｂからは直流信号の検波信号が出力され、同期検波
回路６２ｂ，６３ｂからは演算回路７に０Ｖの信号が送
られている。演算回路７は送られた直流信号の検波信号
を処理して共振周波数ｆ1の地上子１ａを選別する。The ground coil 1a synchronization corresponding to the resonance frequency f 1 of the detection circuit 61a is synchronous detection to a DC signal by the reference signal A swept frequency 98kHz~102kHz the oscillation output from the secondary coil of the board coil 3 Sweep frequency fs = 1kHz
The detection signal having a low frequency to which the AC signal is added is output to the synchronous detection circuits 62a and 63a. The synchronous detection circuit 62a synchronously detects the transmitted detection signal with the reference signal D1 generated by the waveform shaping circuit 44, and the synchronous detection circuit 63a synchronously detects the transmitted detection signal with the reference signal D2 generated by the phase shift circuit 45. Then, the detection signal of the DC signal is sent to the arithmetic circuit 7. On the other hand, corresponding to the resonance frequency f 2 of the ground unit 1b 106KHz～110k
A detection signal of a DC signal is output from the synchronous detection circuit 61b to which the reference signal B whose frequency is swept is input, and a 0 V signal is sent to the arithmetic circuit 7 from the synchronous detection circuits 62b and 63b. Arithmetic circuit 7 processes the detection signal of the transmitted DC signal for selecting a ground coil 1a of the resonance frequency f 1.
【００１６】また、車上子３が共振周波数ｆ2の地上子
１ｂと電磁結合したときは、地上子１ｂの共振周波数ｆ
2に対応した同期検波回路６２ｂ，６３ｂから直流信号
の検波信号を演算回路７に送り、演算回路７で共振周波
数ｆ2の地上子１ｂを選別する。When the vehicle arm 3 is electromagnetically coupled to the ground arm 1b having the resonance frequency f 2 , the resonance frequency f
Synchronous detection circuit 62b corresponding to 2, the feed from 63b the detection signal of the direct current signal to the arithmetic circuit 7, selecting the balise 1b of the resonance frequency f 2 in the arithmetic circuit 7.
【００１７】このように同期検波部６を使用することに
より、外来の電磁雑音の影響を受けることなしで地上子
１ａを選別することができる。また、同期検波部６から
演算回路７に送られる検波信号は地上子１ａ，１ｂの共
振周波数の変動に応じて変化するから、その変化から地
上子１ａ，１ｂの共振周波数の変動を検知することもで
きる。さらに、同期検波部６には地上子１ａ，１ｂの共
振周波数毎に３組の同期検波回路６１，６２，６３を設
ければ良いから、各地上子の共振周波数の許容変動範囲
内の変動の影響を軽減するために地上子の共振周波数の
許容変動範囲の限界を規制する２つの周波数を加算して
対応する場合と比べて同期検波回路の数を減らすことが
できる。By using the synchronous detection unit 6 as described above, the ground element 1a can be selected without being affected by external electromagnetic noise. Further, since the detection signal sent from the synchronous detection unit 6 to the arithmetic circuit 7 changes according to the change in the resonance frequency of the ground elements 1a and 1b, it is necessary to detect the change in the resonance frequency of the ground elements 1a and 1b from the change. Can also. Further, the synchronous detector 6 may be provided with three sets of synchronous detection circuits 61, 62, 63 for each resonance frequency of the ground elements 1a, 1b. In order to reduce the influence, it is possible to reduce the number of synchronous detection circuits as compared with a case where two frequencies regulating the limit of the allowable variation range of the resonance frequency of the grounding element are added and correspondingly added.
【００１８】上記実施例は共振周波数ｆ1，ｆ2の地上子
１ａ，１ｂが設けられた場合について説明したが、２種
類以上の異なる周波数の地上子１が設けられている場合
には、異なる周波数毎に対応した電圧制御発振回路と３
組の同期検波回路を設ければ良い。[0018] The above embodiment if has been described, the ground coil 1 of 2 or more different frequencies are provided for the case where the ground coil 1a of the resonance frequency f 1, f 2, 1b are provided will vary Voltage controlled oscillator circuit corresponding to each frequency and 3
What is necessary is just to provide a set of synchronous detection circuits.
【００１９】また、上記実施例においては地上子１ａの
共振周波数ｆ1に対応して３組の同期検波回路６１ａ，
６２ａ，６３ａを設け、地上子１ｂの共振周波数ｆ2に
対応して３組の同期検波回路６１ｂ，６２ｂ，６３ｂを
設けた場合について説明したが、同期検波回路６１ａ，
６１ｂから出力される検波信号は地上子１ａ，１ｂの共
振周波数ｆ1、ｆ2と関係のない直流信号に掃引周波数ｆ
ｓ＝１ｋＨｚの交流信号を加えた周波数の低い信号であ
るから、同期検波回路６２ａ，６３ａ，６２ｂ，６３ｂ
の同期検波をマイコンで置き換えることもできる。Further, the synchronous detection circuit 61a of the three sets corresponding to the resonance frequency f 1 of the ground coils 1a in the above embodiment,
62a, the provided 63a, the synchronous detection circuit 61b of the three sets corresponding to the resonance frequency f 2 of the ground coil 1b, 62b, has been described in which a 63 b, the synchronous detection circuit 61a,
The detection signal output from 61b is converted into a DC signal irrelevant to the resonance frequencies f 1 and f 2 of the ground elements 1a and 1b, and the sweep frequency f
Since the signal is a low frequency signal obtained by adding an AC signal of s = 1 kHz, the synchronous detection circuits 62a, 63a, 62b, 63b
Can be replaced with a microcomputer.
【００２０】さらに、上記実施例は信号発生部４に鋸波
発振回路４１と２組の電圧制御発振回路４２ａ，４２ｂ
と加算回路４３と波形整形回路４４及び移相回路４５を
設けた場合について説明したが、図２に示すように、信
号発生部４にクロック信号を発生する発振器４０１とア
ドレスカウンタ４０２と送信波形データを格納した送信
波形データ記憶部４０３と１段目同期検波用の参照デー
タを格納した１段目参照データ記憶部４０４と２段目同
期検波用の参照データを格納した２段目参照データ記憶
部４０５とＤ／Ａ変換器４０６及びフリップフロップ４
０７，４０８を設けて、アドレスカウンタ４０２から指
定されたアドレスにより送信波形データ記憶部４０３か
ら送信波形データを読み出し、読み出した送信波形デー
タをＤ／Ａ変換器４０６でＤ／Ａ変換して送信信号Ｃを
出力し、アドレスカウンタ４０２から指定されたアドレ
スにより１段目参照データ記憶部４０４から１段目同期
検波用の参照データを読み出し、発振器４０１からのク
ロック信号によりフリップフロップ４０７から参照信号
Ａ，Ｂを出力し、アドレスカウンタ４０２から指定され
たアドレスにより２段目参照データ記憶部４０５から２
段目同期検波用の参照データを読み出し、発振器４０１
からのクロック信号によりフリップフロップ４０８から
参照信号Ｄ１，Ｄ２を出力するようにしても良い。Further, in the above embodiment, the signal generator 4 includes the sawtooth wave oscillating circuit 41 and two sets of voltage controlled oscillating circuits 42a and 42b.
The description has been given of the case where the adder 43, the waveform shaping circuit 44, and the phase shifter 45 are provided. As shown in FIG. 2, the signal generator 4 generates an oscillator 401 for generating a clock signal, an address counter 402, and transmission waveform data. , A first-stage reference data storage unit 404 storing reference data for first-stage synchronous detection, and a second-stage reference data storage unit storing reference data for second-stage synchronous detection. 405, D / A converter 406 and flip-flop 4
07 and 408 are provided, the transmission waveform data is read from the transmission waveform data storage unit 403 at the address designated by the address counter 402, and the read transmission waveform data is D / A-converted by the D / A converter 406 to transmit the transmission signal. C, reads reference data for the first-stage synchronous detection from the first-stage reference data storage unit 404 according to the address designated by the address counter 402, and outputs the reference signals A, B from the second-stage reference data storage unit 405 according to the address designated by the address counter 402.
The reference data for the stage synchronous detection is read out, and the oscillator 401
The reference signals D1 and D2 may be output from the flip-flop 408 in response to a clock signal from.
【００２１】[0021]
【発明の効果】この発明は以上説明したように、車上装
置の信号発生部は各地上子の共振周波数の許容変動範囲
を一定の周期で掃引した周波数の波形を示す参照信号を
生成し、生成した参照信号を加算して送信信号を生成し
て車上子に送るから、車上子が地上子と電磁結合して共
振するときに、地上子の共振周波数変動の影響を受けに
くくすることができる。また、信号発生器で発振して生
成した送信信号を車上子に送っているからインパルスノ
イズ的な外部雑音に対しても安定して動作をすることが
できる。As described above, according to the present invention, the signal generator of the on-board device generates a reference signal indicating a waveform of a frequency obtained by sweeping the allowable fluctuation range of the resonance frequency of each ground terminal at a constant cycle, Since the generated reference signal is added to generate a transmission signal and send it to the vehicle arm, when the vehicle arm is electromagnetically coupled with the ground arm and resonates, it is less susceptible to the resonance frequency fluctuation of the ground arm. Can be. Further, since the transmission signal generated by the oscillation of the signal generator is sent to the vehicle upper part, the operation can be stably performed against external noise such as impulse noise.
【００２２】また、同期検波部には各地上子の共振周波
数に対応した３組の同期検波回路を設け、初段の同期検
波回路は車上子の２次側コイルからの信号と対応する共
振周波数で生成した参照信号を入力して同期検波し、後
段の一方の同期検波回路は初段の同期検波回路の検波信
号と掃引する一定の周期に同期した波形を示す参照信号
とを入力して同期検波し、後段の他方の同期検波回路は
初段の同期検波回路の検波信号と、掃引する一定の周期
に同期した波形を示す参照信号と90度位相が異なる参照
信号とを入力して同期検波するようにしたから、外来の
電磁雑音の影響を受けることなしで異なる共振周波数の
地上子を選別することができる。さらに、同期検波部に
は地上子の共振周波数毎に３組の同期検波回路を設けれ
ば良いから、各地上子の共振周波数の許容変動範囲内の
変動の影響を軽減するために地上子の共振周波数の許容
変動範囲の限界を規制する２つの周波数を加算して対応
する場合と比べて同期検波回路の数を減らすことができ
る。The synchronous detection section is provided with three sets of synchronous detection circuits corresponding to the resonance frequency of each ground element, and the first-stage synchronous detection circuit has a resonance frequency corresponding to the signal from the secondary coil of the vehicle upper element. Input the reference signal generated in step 2 and perform synchronous detection.One of the subsequent synchronous detection circuits inputs the detection signal of the initial stage synchronous detection circuit and a reference signal indicating a waveform synchronized with a fixed period to be swept and performs synchronous detection. The other synchronous detection circuit at the subsequent stage receives the detection signal of the first-stage synchronous detection circuit and a reference signal indicating a waveform synchronized with a fixed period to be swept and a reference signal having a phase shifted by 90 degrees from the reference signal to perform synchronous detection. Therefore, it is possible to select ground resonators having different resonance frequencies without being affected by external electromagnetic noise. Furthermore, since the synchronous detector may be provided with three sets of synchronous detection circuits for each resonance frequency of the grounding element, the grounding element of the grounding element is reduced in order to reduce the influence of the fluctuation of the resonance frequency of each grounding element within the allowable fluctuation range. The number of synchronous detection circuits can be reduced as compared with a case in which two frequencies that regulate the limit of the allowable variation range of the resonance frequency are added and the two frequencies are added.
【図１】この発明の実施例の構成を示すブロック図であ
る。FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.
【図２】信号発生部の他の構成を示すブロック図であ
る。FIG. 2 is a block diagram showing another configuration of the signal generator.
【図３】従来例の構成を示すブロック図である。FIG. 3 is a block diagram showing a configuration of a conventional example.
【図４】他の従来例の構成を示すブロック図である。FIG. 4 is a block diagram showing a configuration of another conventional example.
１ 地上子 ２ 車上装置 ３ 車上子 ４ 信号発生部 ５ 電力増幅回路 ６ 同期検波部 ７ 演算部 ４１ 鋸波発振回路 ４２ 電圧制御発振回路 ４３ 加算回路 ４４ 波形整形回路 ４５ 移相回路 ６１、６２、６３ 同期検波回路 REFERENCE SIGNS LIST 1 ground element 2 on-board device 3 on-board element 4 signal generation unit 5 power amplification circuit 6 synchronous detection unit 7 calculation unit 41 sawtooth wave oscillation circuit 42 voltage control oscillation circuit 43 addition circuit 44 waveform shaping circuit 45 phase shift circuit 61, 62 , 63 Synchronous detection circuit
Claims (1)
は複数の地上子を有し、各地上子は異なる周波数の共振
回路からなり、車上装置は車上子（３）と信号発生部
（４）と電力増幅回路（５）と同期検波部（６）と演算
部（７）を有し、車上子（３）は１次側コイルと２次側
コイルを有し、列車が走行するにしたがって地上子と電
磁結合し、信号発生部（４）は各地上子の共振周波数の
許容変動範囲を一定の周期で掃引した周波数の波形を示
す参照信号と、各参照信号を加算した送信信号と、掃引
する一定の周期に同期した波形を示す参照信号Ｄ１及び
掃引する一定の周期に同期した波形を示す参照信号Ｄ１
と90度の位相差を有する波形を示す参照信号Ｄ２を生成
し、電力増幅回路（５）は信号発生部（４）から出力す
る送信信号を増幅して車上子（３）の１次側コイルに送
り、同期検波部（６）は各地上子の共振周波数に対応し
た３組の同期検波回路（６１、６２、６３）を有し、初
段の同期検波回路（６１）は車上子（３）の２次側コイ
ルからの信号と対応する地上子の共振周波数に応じて生
成した参照信号を入力して同期検波し、後段の一方の同
期検波回路（６２）は初段の同期検波回路（６１）の検
波信号と信号発生部（４）で生成した掃引する一定の周
期に同期した波形を示す参照信号Ｄ１とを入力して同期
検波し、後段の他方の同期検波回路（６３）は初段の同
期検波回路（６１）の検波信号と信号発生部（４）で生
成した掃引する一定の周期に同期した波形を示す参照信
号Ｄ１と90度の位相差を有する波形を示す参照信号Ｄ２
とを入力して同期検波し、演算回路（７）は後段の各同
期検波回路（６２、６３）からの検波出力から地上子の
信号を選別することを特徴とする点制御式信号選別装
置。A ground device has a plurality of ground members, each of the ground members includes a resonance circuit having a different frequency, and the vehicle device has a ground member and a vehicle member. It has a signal generator (4), a power amplifier circuit (5), a synchronous detector (6), and a calculator (7), and the upper armature (3) has a primary side coil and a secondary side coil, As the train travels, it is electromagnetically coupled with the grounding element, and the signal generating section (4) generates a reference signal indicating a waveform of a frequency obtained by sweeping a permissible variation range of the resonance frequency of each grounding element at a constant cycle, and each reference signal. The added transmission signal, a reference signal D1 indicating a waveform synchronized with a fixed period to be swept, and a reference signal D1 indicating a waveform synchronized with a fixed period to be swept
And a reference signal D2 having a waveform having a phase difference of 90 degrees, and the power amplifier circuit (5) amplifies the transmission signal output from the signal generation unit (4) to the primary side of the vehicle arm (3). The synchronous detection section (6) has three sets of synchronous detection circuits (61, 62, 63) corresponding to the resonance frequencies of the ground elements, and the first-stage synchronous detection circuit (61) has an on-board element (61). 3) The signal from the secondary side coil and the reference signal generated in accordance with the resonance frequency of the grounding element corresponding to the signal are input and synchronously detected. One of the synchronous detection circuits (62) in the subsequent stage is a synchronous detection circuit (62) in the first stage. 61) and the reference signal D1, which is generated by the signal generator (4) and indicates a waveform synchronized with a fixed period to be swept, is inputted and synchronously detected, and the other synchronous detection circuit (63) at the subsequent stage is connected to the first stage. The detection signal of the synchronous detection circuit (61) and the sweep signal generated by the signal generation unit (4) Reference signal the reference signal D1 to the period of indicating the synchronization waveform and shows a waveform having a phase difference of 90 degrees D2
And a synchronous detection circuit, wherein the arithmetic circuit (7) selects signals of ground terminals from the detection outputs from the subsequent synchronous detection circuits (62, 63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17784497A JP2895026B2 (en) | 1997-06-19 | 1997-06-19 | Point control type signal sorting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17784497A JP2895026B2 (en) | 1997-06-19 | 1997-06-19 | Point control type signal sorting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1111313A JPH1111313A (en) | 1999-01-19 |
| JP2895026B2 true JP2895026B2 (en) | 1999-05-24 |
Family
ID=16038107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17784497A Expired - Lifetime JP2895026B2 (en) | 1997-06-19 | 1997-06-19 | Point control type signal sorting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2895026B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100700199B1 (en) | 2005-11-02 | 2007-03-28 | 서울메트로 | Protection-System for ATS's malfunction and method thereof |
| JP5204205B2 (en) * | 2010-12-07 | 2013-06-05 | 株式会社東芝 | Train control on-board equipment |
-
1997
- 1997-06-19 JP JP17784497A patent/JP2895026B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1111313A (en) | 1999-01-19 |
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