JP3233237B2 - On-board equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle apparatus, and more particularly, to an error between a travel distance obtained by calculating a speed signal of a speed detector which becomes non-linear in a low speed range and an actual travel distance. The present invention relates to a technology for reducing the amount of light.

[0002]

2. Description of the Related Art As an example of a mobile control device including an on-board device, an automatic train stop device (hereinafter, referred to as an ATS device).
An ATS-SP type device is known as an example of the ATS device. The ATS-SP type device is an intelligent version of the ATS-S type device, and automatically determines whether a train can be stopped by a traffic signal indicating a stop signal. That is, the ATS-SP type device provides a speed check pattern including a distance to a traffic signal and an allowable speed when a stop signal is received, and checks the running position and running speed of the moving body as needed.

The ATS-SP type device obtains a speed signal of a moving body from a speed generator provided on an axle. The speed generator outputs a linear speed signal proportional to the rotation speed if the rotation speed of the axle is equal to or higher than a certain value, and a non-linear speed signal that is not proportional to the rotation speed when the rotation speed falls below a certain value. Is output. The traveling distance of the moving body is obtained by integrating the speed signal.

[0004]

However, the conventional on-vehicle apparatus uses a speed generator which generates an unstable nonlinear speed signal in a low speed range as a speed detector in order to obtain a traveling distance. In order to remove the influence of the unstable speed signal, the speed signal in the low speed range is processed as being stopped, so that there is a discrepancy between the calculated travel distance and the actual travel distance. Recently, it has been required to improve the accuracy of moving object control, and a difference in running distance has become a problem.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide an on-vehicle device capable of reducing a difference in traveling distance even when a speed detector that becomes non-linear in a low speed range is used. That is.

[0006]

In order to solve the above-described problems, the present invention includes a speed detector and a signal processing circuit,
An on-vehicle device mounted on a moving body, wherein the speed detector outputs a linear speed signal in a high-speed range and outputs a non-linear speed signal in a low-speed range. When the speed signal is input and the speed signal is within a linear region, the speed signal is integrated to obtain a moving distance of the moving body, and the speed signal is within the non-linear region. The correction distance is determined assuming that the moving body has been decelerated or accelerated at a uniform acceleration when the vehicle enters the vehicle, and the travel distance of the moving body is determined by adding the movement distance and the correction distance.

[0007]

The signal processing circuit receives the speed signal from the speed detector and integrates the speed signal when the speed signal is within the linear region to obtain the moving distance of the moving body. An accurate moving distance can be obtained according to the speed signal.

The signal processing circuit obtains a correction distance assuming that the moving object has been decelerated or accelerated at a constant acceleration when the speed signal enters the non-linear region in the low speed range, and determines the moving distance and the correction distance. Since the distance traveled by the moving object is obtained by adding the speed, the speed of the moving object from the upper limit speed in the low speed range to the stop speed or the speed from the start to the upper limit speed in the low speed range is linearly approximated, Correction distance is calculated accurately,
A more accurate travel distance is required than the travel distance including an unstable speed signal. Normally, when the moving body starts and stops, the moving body is given an equal acceleration. Therefore, there is no problem even if the running speed is linearly approximated. For this reason, the speed signal of the non-linear portion, which was conventionally processed as a stop, can be substantially used, and even if a speed detector that becomes non-linear in a low speed range is used, the difference in the traveling distance can be reduced. Can be reduced.

[0009]

FIG. 1 is a block diagram showing the configuration of an on-board device according to the present invention. The figure shows a case where the present invention is applied to an ATS-SP type device, 1 is a speed detector, 2 is a signal processing circuit, 3 is a train which is a moving body, 4 is a traffic light, 5 is a ground transmitter, 51 is a loop antenna, 51 is a loop antenna, 52 is a power receiver, 6 is an instrument box, 61 to 6
3 is a ground child and 7 is an orbit. The on-board device includes a speed detector 1 and a signal processing circuit 2.

The speed detector 1 outputs a linear speed signal S1 when the running speed of the train 3 is high and outputs a non-linear speed signal S1 when the running speed is low. In the embodiment, the speed detector 1
Consists of a speed generator. The speed generator 1 is provided on the axle 31 of the train 3 and outputs the rotation speed of the axle 31 as a speed signal S1. The speed signal S1 indicates that the traveling speed is 5 k
Shows linearity proportional to running speed at m / h or more, 5 km
When the value is less than / h, unstable nonlinearity not proportional to the traveling speed is exhibited.

The signal processing circuit 2 receives a speed signal S1 and a control signal S2. The control signal S2 is transmitted from the ground transmitter 5 and input to the signal processing circuit 2 via the loop antenna 51 and the power receiver 52. The control signal S2 is a signal relating to the traveling distance of the train 3, and for example, is a signal indicating that the train 3 stops before the traffic signal 4 at a distance of 600 meters. In order to control the train in response to the control signal S2, the signal processing circuit 2 integrates the speed signal S1 when the speed signal S1 is within the linearity region to obtain the travel distance of the train 3, and obtains the speed signal S1 Is calculated assuming that the train 3 has been decelerated or accelerated at a constant acceleration when the vehicle enters the non-linear region, and the travel distance of the train 3 is calculated by adding the travel distance and the corrected distance.

FIG. 2 is a characteristic diagram showing a speed signal input to the signal processing circuit when the train decelerates. In the figure, the horizontal axis indicates time, the vertical axis indicates speed, reference numeral A indicates an area where the speed signal S1 is linear in a high speed region, and reference numeral B
Indicates an area where the speed signal S1 is non-linear in the low speed range. The solid line indicates the actual speed signal S1, and the dotted line indicates the virtual speed signal when the train 3 is stopped at a constant acceleration from the upper limit speed V (5 km / h) in the low speed range B and stopped. Hereinafter, FIG. 2 will be described with reference to FIG.

As described above, the signal processing circuit 2 receives the speed signal S1 from the speed detector 1, and integrates the speed signal S1 when the speed signal S1 is within the linearity area A, thereby integrating the speed signal S1. Since the moving distance L1 is determined,
An accurate moving distance L1 can be obtained according to the speed signal S1. The movement distance L1 is given by an area surrounded by reference numeral bcde.

The signal processing circuit 2 calculates a correction distance L2 assuming that the train 3 has been decelerated at a constant acceleration when the speed signal S1 enters the non-linear region B, and calculates the correction distance L2 and the correction distance L2. Is added to obtain the traveling distance L3 of the train 3, so that the train 3
The speed from stop to stop is linearly approximated, and the correction distance L2
Is accurately calculated, and a more accurate running distance L3 is obtained than when the running distance including the unstable speed signal S1 is obtained.
The correction distance L2 is given by an area surrounded by reference numeral abc. Normally, when the train 3 starts and stops, a constant acceleration is applied to the train 3, so that there is no problem even if the virtual speed signal is linearly approximated. For this reason, the speed signal of the non-linear portion, which has been conventionally processed as a stop, can be substantially used, and even when a speed detector that is non-linear in a low-speed region is used, the calculated traveling distance L3 And the actual running distance can be reduced.

The signal processing circuit 2 sets the upper limit speed in the low speed range to V, and sets the time from deceleration from the upper limit speed V to stop by T1.
In this case, the correction distance L2 is obtained as L2 = (V * T1) / 2, so that the correction distance L2 when decelerating at a constant acceleration can be obtained. The time T1 is obtained by the signal processing circuit 2 from the speed signal S1. The acceleration is given by the gradient of the dotted line.

FIG. 3 is a characteristic diagram showing a speed signal input to the signal processing circuit when the train starts. In the figure, FIG.
The same reference numerals as those shown above indicate identical parts. The solid line shows the actual speed signal S1, and the dotted line shows the virtual speed signal when the train 3 is accelerated from the start to the upper limit speed V (5 km / h) of the low speed range B at a constant acceleration. Hereinafter, FIG. 3 will be described with reference to FIG.

The signal processing circuit 2 calculates the corrected distance L2 assuming that the train 3 is accelerated at a constant acceleration when starting, and calculates the traveling distance L3 of the train 3 by adding the moving distance L1 and the corrected distance L2. Therefore, the speed from the start of the train 3 to the upper limit speed V in the low speed range B is linearly approximated, the corrected distance L2 is accurately calculated, and the train 3 is more accurate than the travel distance including the unstable speed signal S1. The required running distance L3 is determined.

The signal processing circuit 2 sets the upper limit speed in the low speed range to V, and sets the time from stop to acceleration to the upper limit speed V as T.
In the case of 2, the correction distance L2 is obtained as L2 = (V * T2) / 2, so that the correction distance L2 when accelerating at a constant acceleration can be obtained.

Further, in the embodiment, the signal processing circuit 2 is configured to receive a power running notch signal S3 indicating start. The signal processing circuit 2 starts measuring the time T2 based on the powering notch signal S3. Therefore, the determination at the time of starting is clearer than the determination at the time of starting from the change in the speed signal S1, and the correction distance L2 can be calculated more accurately.

61 is a long ground child, 62 is a middle ground child,
Reference numeral 63 denotes an upper child, and 64 denotes an upper child. The appliance box 6
The permissible traveling speed signal S4 at each point is transmitted via the ground terminals 61 to 63. The signal processing circuit 2 receives the allowable speed signal S4 via the upper armature 64 and outputs a brake signal S5 when the speed signal S1 exceeds the allowable speed signal S4. Thereby, the ATS control is executed.

[0021]

As described above, according to the present invention, the following effects can be obtained. (A) Since the signal processing circuit receives the speed signal from the speed detector and integrates the speed signal when the speed signal is within the linear region, the moving distance of the moving body is obtained. It is possible to provide an on-board device that can obtain an accurate moving distance according to a speed signal. (B) The signal processing circuit obtains a correction distance assuming that the moving object has been decelerated or accelerated at a constant acceleration when the speed signal enters the non-linear region in the low-speed region, and determines the movement distance and the correction distance. Since the traveling distance of the moving body is obtained by adding the values, it is possible to provide an on-vehicle device capable of reducing a difference in traveling distance even when a speed detector that becomes non-linear in a low-speed region is used.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an on-board device according to the present invention.

FIG. 2 is a characteristic diagram illustrating a speed signal input to a signal processing circuit during deceleration.

FIG. 3 is a characteristic diagram illustrating a speed signal input to a signal processing circuit at the time of starting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Speed detector 2 Signal processing circuit 3 Moving body (train) 4 Traffic light 5 Ground transmitter 51 Loop antenna 52 Power receiver 6 Instrument box 61-63 Ground child 64 Car child 7 Track S1 Speed signal S2 Control signal S3 Power running notch Signal S4 Allowable speed signal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-161815 (JP, A) JP-A-5-221320 (JP, A) JP-A-4-315008 (JP, A) JP-A-3-315 145903 (JP, A) JP-A-59-136002 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 3/00-3/12 B60L ^7/ 20-7/24 B61L 1/00-3/24

Claims (4)

(57) [Claims] A speed detector and a signal processing circuit;
An on-vehicle device mounted on a moving object, wherein the speed detector outputs a linear speed signal when the traveling speed of the moving object is high and outputs a non-linear speed signal when the traveling speed is low. Wherein the signal processing circuit receives the speed signal and integrates the speed signal when the speed signal is within a linear region to obtain a moving distance of the moving body. The moving distance is calculated assuming that the moving body has been decelerated or accelerated at a constant acceleration when entering the non-linear region, and the moving distance and the corrected distance are added to calculate the traveling distance of the moving body. What you want
In the correction distance L2, V is an upper limit speed of the low speed range, and
The time from deceleration from the upper limit speed V to the stop is T1
In- vehicle device obtained as L2 = (V * T1) / 2 . A speed detector and a signal processing circuit;
An on-vehicle device mounted on a moving object, wherein the speed detector outputs a linear speed signal when the traveling speed of the moving object is high and outputs a non-linear speed signal when the traveling speed is low. Wherein the signal processing circuit receives the speed signal and integrates the speed signal when the speed signal is within a linear region to obtain a moving distance of the moving body. The moving distance is calculated assuming that the moving body has been decelerated or accelerated at a constant acceleration when entering the non-linear region, and the moving distance and the corrected distance are added to calculate the traveling distance of the moving body. The correction distance L2 is obtained by setting the upper limit speed of the low speed range to V, stopping
The time from acceleration to reaching the upper limit speed V is T2.
The on- board device obtained as L2 = (V * T2) / 2 . 3. The speed detector comprises a speed generator,
The on-vehicle device according to claim 1, wherein the speed generator is provided on an axle of the moving body. 4. The on-vehicle apparatus according to claim 2, wherein the signal processing circuit receives a power running notch signal indicating start, and starts measuring the time T2 based on the power running notch signal.