JP3371987B2 - Orbit signal detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an orbit signal detecting device used for controlling a moving body, and more specifically, a phase difference between a local signal and an orbit signal, an orbit signal reception level and an in-phase orbit circuit signal in-phase signal. By detecting the reverse phase, the state of the track circuit is normal and the moving body is "absent". In-phase signal, anti-phase signal, the moving body "exists" or the state of the track circuit is abnormal. The present invention relates to a technique for detecting the third-order signal of a signal.

[0002]

2. Description of the Related Art As a conventional track signal detecting device used for controlling a moving body, a binary track circuit receiver disclosed in Japanese Patent Laid-Open No. 64-18768 is known. The dual-type track circuit receiver delays the drive torque of the dual-type track relay, which is generally used in the technical field of railroad, for a certain period of time so that the phase of the local voltage matches the phase of the track voltage. It is obtained by multiplying the local side voltage by the track side voltage, and the level is determined by averaging the averages to determine the quality of the track circuit and the presence / absence of a train.

[0003]

However, although the conventional orbit signal detecting device has achieved the miniaturization and easy adjustment of the binary orbit relay by the computerization, the orbit signal detecting device of the binary orbit relay has been achieved. The driving torque is calculated by multiplying the local voltage and the orbital voltage by delaying the local voltage for a certain period of time so that the local voltage phase matches the orbital voltage phase.Therefore, the multiplication result is always positive and negative The phase signal cannot be detected. Therefore, it is not possible to adopt the control system of the three-order signal useful for controlling the moving body in the intermediate closed section. The control method of the third-order signal is to invert and transmit the transmission signal of the blocking section when there is a moving body in the immediately preceding blocking section, and transmit the moving body detection signal for each blocking section to the centralized equipment room. There is a usefulness such as abolishing the transmission cable and enabling distributed mobile control.

Therefore, an object of the present invention is to solve the above-mentioned problems and to make the function of a conventional orbital relay electronic so that the size and the adjustment can be facilitated and the orbit capable of detecting a three-position signal can be detected. It is to provide a signal detection device.

[0005]

In order to solve the above-mentioned problems, the present invention is a trajectory signal detection apparatus including a local input circuit, a trajectory input circuit, and an arithmetic processing circuit, wherein the local input circuit comprises: A signal of either in-phase or anti-phase to the transmission signal transmitted from one end of the track circuit is input as a local signal, and a reference signal is generated when the local signal changes from negative to positive or from positive to negative. The track input circuit receives the transmission signal received at the other end of the track circuit as a track signal, A / D-converts the track signal, and outputs the track output signal. The arithmetic processing circuit receives the reference signal and the trajectory output signal, and when the reference circuit is input when the moving object is “absent” in the trajectory circuit at the beginning of installation, the trajectory is calculated. The output signal is Initially store the phase difference until reaching a high value as a reference phase difference, and multiply the detected peak value by the cosine value of the difference between the phase difference detected based on the trajectory output signal during operation and the reference phase difference. However, the in-phase signal is output when the multiplication value is greater than or equal to the positive reference value, the in-phase signal is output when the multiplied value is less than or equal to the negative reference value, and the detection signal that detects the rest as no signal is output.

[0006]

In the local input circuit, either the in-phase signal or the anti-phase signal with respect to the transmission signal transmitted from one end of the track circuit is input as the local signal, and the local signal changes from negative to positive or from positive to negative. The orbit input circuit receives a transmission signal received at the other end of the orbit circuit as a orbit signal, and A / D converts the orbit signal to output as an orbit output signal. The arithmetic processing circuit initially stores the phase difference from when the reference signal was input at the time of installation until the orbit output signal reaches the peak value as the reference phase difference, and based on the orbit output signal during operation. Since the cosine value of the difference between the detected phase difference and the reference phase difference is multiplied by the detected peak value, the orbit signal is in-phase or anti-phase with the local signal depending on the polarity of the multiplication value. Can judge It can determine the state of the track circuit by the multiplication value.

As an example, the local input circuit uses a signal in phase with the transmission signal transmitted to the track circuit as a local signal, and generates a reference signal when the local signal changes from negative to positive. explain. If the transmission signal transmitted to the track circuit and the local signal are in phase, if the phase difference from the input of the reference signal to the peak value of the track output signal is calculated, the track output signal at that time is calculated. The peak value of is a positive value. When the connection from the transmitter to the track circuit is switched and the transmission signal transmitted to the track circuit and the local signal have opposite phases, the peak value of the track output signal at that time becomes a negative value. The difference between the detected phase difference and the reference phase difference is 90
Since the cosine value of the difference between the detected phase difference and the reference phase difference is a positive value, the multiplication value is "positive".
In the case of, it can be determined that the phase is in-phase, and in the case of "negative", it can be determined that the phase is reverse-phase. If the difference between the phase difference detected based on the trajectory output signal during operation and the reference phase difference becomes large, the cosine value becomes small, and the multiplication value becomes small, it can be determined that the impedance of the track circuit has changed over time. . When the peak value of the orbit output signal becomes small and the multiplication value becomes small, it can be determined that there is a moving object on the orbit.

The cosine value of the difference between the detected phase difference and the reference phase difference includes the common phase difference between the detected phase difference and the reference phase difference. The phase is adjusted so that the phase change of the orbit output signal can be detected. Therefore, adjustment can be facilitated.

The arithmetic processing circuit outputs an in-phase signal when the multiplication value is greater than or equal to the positive reference value, a negative-phase signal when the multiplication value is less than or equal to the negative reference value, and a detection signal for detecting other signals as no signal. From the in-phase signal, which means that the track circuit is in a normal state and the mobile body is “absent”, a reverse-phase signal, and the signal is a “three” signal, which means that the tracker circuit is abnormal or the track circuit is in an abnormal state. Can be detected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first orbit signal detecting device according to the present invention.
3 is a block diagram showing the configuration of the embodiment of FIG. In the figure,
1 is a local input circuit, 2 is a track input circuit, 3 is an arithmetic processing circuit, 40-42 are track circuits, 5 is a track circuit transmitter, 6 is a polarity switching circuit, 7 is a train, and 81 and 82 are traffic signals.
The local input circuit 1, the trajectory input circuit 2, and the arithmetic processing circuit 3 constitute a trajectory signal detection device. The orbit signal detecting device is composed of a microcomputer. The track circuit transmitter 5 is connected to one end 411 of the track circuit 41 and transmits a transmission signal S1. The polarity switching circuit 6 switches the connection to the two rails forming the track circuit 41 by the train detection signal S8 of the track circuit 42 in the front, and switches the transmission signal S1 to the same phase or the opposite phase. The track circuit 41 is short-circuited by the axle of the train 7. Although the drawing is limited to the track circuit 41, the track circuits 40 and 42 have the same configuration.

The local input circuit 1 includes one end 4 of the track circuit 41.
A signal of either in-phase or anti-phase with respect to the transmission signal S1 transmitted from 11 is input as a local signal S3, and a reference signal S4 is generated when the local signal S3 changes from negative to positive or from positive to negative. To do. Specifically, it is composed of a zero-cross circuit, a signal in phase with the transmission signal S1 becomes a local signal S3, and when the local signal S3 changes from negative to positive, the reference signal S4 is generated. The reference signal S4 is provided at the rising edge of the square wave signal. Although not shown, the track circuit transmitter 6 is configured to switch between the in-phase transmitter that transmits the in-phase transmission signal S1 and the anti-phase transmitter that transmits the anti-phase transmission signal S1 and transmit the same to the track circuit 41. In this case, either the in-phase transmitter or the transmission signal S1 of the anti-phase transmitter may be selected as the local signal S3.

The track input circuit 2 includes the other end 4 of the track circuit 41.
The transmission signal S1 received at 12 is input as the orbit signal S5, the orbit signal S5 is A / D converted, and the orbit output signal S is obtained.
Output as 6. The trajectory input circuit 2 is a general A / D
It can be composed of a conversion circuit.

The local input circuit 1 and the trajectory input circuit 2 are provided with a band-pass filter (not shown) that allows the frequency component of the transmission signal S1 to pass therethrough to block noise components.

The arithmetic processing circuit 3 receives the reference signal S4 and the trajectory output signal S6. At the beginning of installation, track circuit 41
In the state where the moving body is "absent", the phase difference from when the reference signal S4 is input to when the trajectory output signal S6 reaches the peak value is initially stored as the reference phase difference. The detected crest value is multiplied by the cosine value of the difference between the phase difference detected based on the trajectory output signal S6 during operation and the reference phase difference, and when the multiplication value is equal to or greater than the positive reference value, the in-phase signal, When it is less than or equal to the negative reference value, the detection signal S7 that outputs a negative phase signal and no signal other than the negative phase signal is output.

FIG. 2 is a waveform diagram for explaining the operation of the first embodiment. In the figure, S3 is the waveform of the local signal, S4 is the waveform of the reference signal, S60 is the waveform of the orbit output signal at the time of installation, and S6 is the waveform of the orbit output signal during operation.
The trajectory output signals S60 and S6 represent envelopes of A / D converted values. φ0 is the reference phase difference due to the trajectory output signal S60, φ is the phase difference due to the trajectory output signal S6, Pm0 is the peak value of the trajectory output signal S60, and Pm is the peak value of the trajectory output signal S6. Hereinafter, FIG. 2 will be described together with the operation with reference to FIG.

As described above, in the local input circuit 1, either the in-phase signal or the anti-phase signal with respect to the transmission signal S1 transmitted from the one end 411 of the track circuit 41 is the local signal S.
3, the reference signal S4 is generated when the local signal S3 changes from negative to positive or from positive to negative, and the track input circuit 2 receives the transmission signal at the other end 412 of the track circuit 41. S1 is input as the trajectory signal S5,
The orbit signal S5 is A / D-converted and output as the orbit output signal S6. The arithmetic processing circuit 3 starts the orbit output signal S60 from when the reference signal S4 is input at the beginning of installation.
Is initially stored as the reference phase difference φ0 until the peak value Pm0 reaches the crest value Pm0, and the cosine value {cos (φ−) of the difference between the phase difference φ detected based on the orbit output signal S6 and the reference phase difference φ0.
Since the peak value Pm is multiplied by φ0)}, it is determined that the orbit signal S5 is in-phase or anti-phase with the local signal S3 according to the polarity of the multiplication value {Pm cos (φ-φ0)}. Yes, multiplication value {Pm cos (φ-φ0)}
Thus, the state of the track circuit 41 can be determined.

The local input circuit 1 uses a signal in phase with the transmission signal S1 transmitted to the track circuit 41 as a local signal S3, and triggers the rising of the square wave signal when the local signal S3 changes from negative to positive. To generate a reference signal S4. When the orbit signal S5 and the local signal S3 transmitted to the orbit circuit 41 have the same phase, the phase difference φ from when the reference signal S4 is input until the orbit output signal S6 reaches the peak value Pm is calculated. , The peak value P of the orbit output signal S6 at that time
m is a positive value. Switch the connection to the track circuit 41,
The transmission signal S1 and the local signal S3 transmitted to the track circuit 41
If and are in reverse phase, the trajectory output signal S
The peak value Pm of 6 becomes a negative value. The difference between the phase difference φ detected based on the orbit output signal S6 and the reference phase difference φ0 is 90.
Cosine value {cos (φ-φ0
)} Is a positive value, the multiplication value {Pm cos (φ−
If φ 0)} is “positive”, it can be determined that the phase is in-phase, and if “φ 0)} is“ negative ”, it can be determined that the phase is in-phase. When the difference between the phase difference φ detected based on the orbit output signal S6 and the reference phase difference φ0 becomes large and the cosine value {cos (φ−φ0)} becomes small, the change over time in the impedance of the track circuit 41 changes. It can be determined that there was. That is, the abnormality of the track circuit 41 can be determined. The peak value Pm of the orbit output signal S6 becomes smaller and the multiplication value {P
When m cos (φ-φ 0)} becomes small, it can be determined that the train 7 is on the track. Train 7 is track circuit 4
When 1 is short-circuited between gauges, the peak value Pm becomes almost zero.

Since the cosine value {cos (φ-φ0)} includes the common phase difference φc between the phase difference φ and the reference phase difference φ0, the orbit output signal S6 should be in phase with the reference signal S4 at the beginning of installation. Then, the phase change of the trajectory output signal S6 is detected. Therefore, adjustment can be facilitated.

The arithmetic processing circuit 3 uses the multiplication value {Pm cos
(Φ−φ0)} is a positive reference value or more, an in-phase signal, a negative reference value or less, a negative-phase signal, and a detection signal that detects the other signals as no signal. Four
1 is normal and in-phase signal, which means "no train", opposite-phase signal,
It is possible to detect a non-signal third-order signal which means that the train “present” or the track circuit 41 is abnormal. For the positive reference value and the negative reference value, the cosine value {cos (φ-φ0)} is usually recognized up to about 0.8, and the peak value Pm due to weather fluctuation
Change of about 10% is recognized, so the peak value Pm of 0.7
It is set about twice. In the field of train control, train "Yes"
Since it is more fail-safe to output the detection signal S7 indicating that the train is "absent", the positive reference value and the negative reference value tend to be set higher.

Therefore, by making the function of the conventional orbital relay electronic, it is possible to miniaturize and facilitate the adjustment, and to provide an orbital signal detecting device capable of detecting a three-position signal.

FIG. 3 is a waveform diagram for explaining the operation of the second embodiment of the orbit signal detecting apparatus according to the present invention. In the figure, the same reference numerals as those in FIG. 2 denote the same components.

In the arithmetic processing circuit 3 of this embodiment, the detected peak value Pm is the trajectory output signal value Pm1 at the phase difference φ and the trajectory output signal value P at the point 180 ° behind the phase difference φ.
It is given as the difference from m2. The orbit output signal value Pm1 is the same as the peak value Pm in the first embodiment, and the expression is changed for convenience of explanation. The phase difference is equivalent to time. The trajectory output signal value Pm2 is obtained from the trajectory output signal S6 at the time when 1/2 cycle has elapsed from the time when the trajectory output signal value Pm1 was detected. When the transmission signal S1 transmitted to the track circuit 41 is in phase, the track output signal value Pm2 is equal to the track output signal value Pm1 and the polarities are opposite. Therefore, the peak value Pm is given by Pm = Pm1 − (− Pm1) = 2Pm1. Transmission signal S1 transmitted to the track circuit 41
The same applies to the case where P is in the opposite phase, and the peak value Pm is given by Pm = -Pm1-Pm1 = -2Pm1. As a result, the multiplication value {Pm cos (φ-
φ 0)} is twice the multiplication value of the first embodiment, and the noise resistance is improved.

In the above embodiment, the local signal S3 is transmitted as a cable and is treated as having a constant attenuation rate without any change with time. That is, in the formula of the drive torque of the orbit relay given in JP-A-64-18768,
The peak value of the local signal S3 is treated as a constant 1. Therefore, when the peak value Pm is small and the multiplication value is too small, the multiplication value can be set to an appropriate value by increasing the constant corresponding to the peak value of the local signal S3.

[0024]

As described above, according to the present invention, the local input circuit inputs either the in-phase signal or the anti-phase signal as the local signal to the transmission signal transmitted from one end of the track circuit. The reference signal is generated when the local signal changes from negative to positive or from positive to negative, and the orbit input circuit receives the transmission signal received at the other end of the orbit circuit as the orbit signal, The signal is A / D converted and output as a trajectory output signal.
The phase difference between when the reference signal is input at the beginning of installation and when the orbit output signal reaches the peak value is initially stored as the reference phase difference, and the phase difference and the reference phase difference detected based on the orbit output signal during operation are stored. Multiply the detected crest value by the cosine value of the difference between, and the in-phase signal when the multiplied value is equal to or greater than the positive reference value,
When it is less than the negative reference value, it outputs a negative-phase signal and a detection signal that detects other signals as no signal. It is possible to provide an orbit signal detection device that can detect the three-position signal while facilitating the simplification.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of a trajectory signal detection device according to the present invention.

FIG. 2 is a waveform diagram illustrating the operation of the first embodiment.

FIG. 3 is a waveform diagram for explaining the operation of the second embodiment of the orbit signal detecting apparatus according to the present invention.

[Explanation of symbols]

1 Local input circuit 2 orbit input circuit 3 arithmetic processing circuit 4 track circuits 5 Track circuit transmitter 6 polarity switching circuit 7 moving body S1 transmission signal S3 local signal S4 reference signal S5 orbit signal S6 orbit output signal S7 detection signal

Front page continuation (72) Hidetaka Saegusa Hidetaka Saegusa 1-13-8 Kamikizaki, Urawa-shi, Saitama Nihon Signal Co., Ltd. Yono Works (56) References JP 59-184058 (JP, A) JP Heihei 3-293901 (JP, A) Jikkouhei 3-42477 (JP, Y2) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B61L 1/18

Claims (2)

(57) [Claims] 1. A trajectory signal detection device including a local input circuit, a trajectory input circuit, and an arithmetic processing circuit, wherein the local input circuit is in phase with a transmission signal transmitted from one end of the trajectory circuit or Either one of the opposite-phase signals is input as a local signal, and the local signal is to generate a reference signal when the local signal changes from negative to positive or from positive to negative. The transmission signal received at the other end is input as a trajectory signal, A / D-converts the trajectory signal and outputs it as a trajectory output signal, and the arithmetic processing circuit includes the reference signal and the trajectory output. Signal is input, the phase difference from the time when the reference signal is input to the peak value of the track output signal when the moving body is “absent” in the track circuit at the time of installation is the reference phase difference. As an initial note Incidentally, when the cosine value of the difference between the phase difference detected based on the orbit output signal during operation and the reference phase difference is multiplied by the detected peak value, and the multiplication value is a positive reference value or more. An in-phase signal, a reverse-phase signal when the value is less than or equal to a negative reference value, and a detection signal that detects other signals as no signal. 2. The arithmetic processing circuit is given by a difference between the orbit output signal value at the phase difference and the orbit output signal value at a point delayed by 180 degrees from the phase difference. The orbit signal detection device according to Item 1.