JP2006189371A - Speed detection system for vehicle - Google Patents

Speed detection system for vehicle Download PDF

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Publication number
JP2006189371A
JP2006189371A JP2005002626A JP2005002626A JP2006189371A JP 2006189371 A JP2006189371 A JP 2006189371A JP 2005002626 A JP2005002626 A JP 2005002626A JP 2005002626 A JP2005002626 A JP 2005002626A JP 2006189371 A JP2006189371 A JP 2006189371A
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Prior art keywords
speed
difference
vehicle
detection device
detecting
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Japanese (ja)
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Chikato Ishitobi
親人 石飛
Masayuki Ueno
雅之 上野
Satoshi Kobayashi
学志 小林
Takafumi Fukushima
隆文 福島
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Mitsubishi Electric Corp
Central Japan Railway Co
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Mitsubishi Electric Corp
Central Japan Railway Co
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Priority to JP2005002626A priority Critical patent/JP2006189371A/en
Publication of JP2006189371A publication Critical patent/JP2006189371A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a speed detection system for a vehicle for detecting abnormality generated on any of a power generating part, a wheel shaft and a power transmission mechanism. <P>SOLUTION: The speed detection system comprises a speed generator 6 for detecting a rotation speed of the wheel shaft 13 of the vehicle, a speed generator 7 for detecting rotation speed of a generator 4 being a drive source of the wheel shaft 13, and a difference detecting means 8 for detecting a difference between a first rotation speed detected with the speed generator 6 and a second rotation speed detected with the speed generator 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、車両の輪軸の回転速度と動力発生部の回転速度とを比較して異常を検出する車両用速度検出装置に関する。   The present invention relates to a vehicle speed detection device that detects an abnormality by comparing a rotation speed of a wheel shaft of a vehicle with a rotation speed of a power generation unit.

従来の車両用速度検出装置は、動力発生部または輪軸のどちらか一方にのみ速度検出器を取り付けて回転速度を検出している（例えば、非特許文献１参照）。   A conventional vehicle speed detection device detects a rotational speed by attaching a speed detector only to either the power generation unit or the wheel shaft (for example, see Non-Patent Document 1).

内田清五著、「新幹線のブレーキシステム」、初版、有限会社レールアンドテック社、２００１年３月３０日、ｐ．２４−ｐ．２６By Uchida Kiyogo, “Shinkansen Brake System”, first edition, Rail and Tech Co., Ltd., March 30, 2001, p. 24-p. 26

従来の車両用速度検出装置は、動力発生部または輪軸のどちらか一方にのみ速度検出器が取り付けられているので、動力発生部、輪軸、および動力発生部から輪軸に至る動力伝達機構の何れかに異常が発生した場合、速度検出器が取り付けられた箇所で発生した異常については、異常を検知できるが、速度検出器が取り付けられていない箇所で発生した異常については、異常を検知することができないという問題点があった。   Since the conventional vehicle speed detection device has a speed detector attached only to either the power generation unit or the wheel shaft, any one of the power generation unit, the wheel shaft, and the power transmission mechanism from the power generation unit to the wheel shaft If an abnormality occurs, the abnormality can be detected for the abnormality that occurred at the place where the speed detector is attached, but the abnormality can be detected for the abnormality that occurred at the place where the speed detector is not attached. There was a problem that it was not possible.

この発明は、上記のような問題点を解決することを課題とするものであって、その目的は、輪軸の回転速度と動力発生部の回転速度とを比較することによって、動力発生部、輪軸および動力伝達機構の何れかに発生した異常を検知することができる車両用速度検出装置を提供するものである。   An object of the present invention is to solve the above-described problems, and an object of the present invention is to compare the rotational speed of the wheel shaft with the rotational speed of the power generating section, thereby And a vehicle speed detection device capable of detecting an abnormality occurring in any of the power transmission mechanisms.

この発明に係る車両用速度検出装置は、車両の輪軸の回転速度を検出する第１の検出手段と、輪軸の駆動源である動力発生部の回転速度を検出する第２の検出手段と、第１の検出手段で検出した第１の回転速度と、第２の検出手段で検出した第２の回転速度との差異を検出する差異検出手段とを備えたものである。   The vehicle speed detection device according to the present invention includes a first detection means for detecting a rotation speed of a wheel shaft of a vehicle, a second detection means for detecting a rotation speed of a power generation unit that is a drive source of the wheel shaft, And a difference detection means for detecting a difference between the first rotation speed detected by the first detection means and the second rotation speed detected by the second detection means.

この発明の車両用速度検出装置によれば、輪軸の回転速度と動力発生部の回転速度とを比較することができるので、回転速度の差異に基づいて、動力発生部、輪軸および動力伝達機構の何れかに発生した異常を検知することができる。   According to the vehicle speed detection device of the present invention, the rotational speed of the wheel shaft and the rotational speed of the power generation unit can be compared. Therefore, based on the difference in rotational speed, the power generation unit, the wheel shaft, An abnormality occurring in any one of them can be detected.

以下、この発明の各実施の形態について図に基づいて説明するが、各図において同一、または相当する部材、部位については、同一符号を付して説明する。
実施の形態１．
図１は、この発明の実施の形態１に係る車両用速度検出装置を示す構成図である。
図１において、この車両用速度検出装置１は、両端部に車輪２が固定された車軸３の端部に設けられ、車軸３の回転速度を検出する第１の検出手段である速度発電機６を有している。
また、この車両用速度検出装置１は、第１の平歯車１６および第２の平歯車５を介して車軸３に動力を供給する動力発生部である電動機４の回転軸の一端に設けられ、電動機４の回転軸の回転速度を検出する第２の検出手段である速度発電機７を有している。
なお、電動機４の回転軸の他端に固定された第１の平歯車１６と、車軸３に固定された第２の平歯車５とにより、動力伝達機構を構成している。
ここで、車輪２と車軸３とにより、輪軸１３は構成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.
Embodiment 1 FIG.
1 is a block diagram showing a vehicle speed detection device according to Embodiment 1 of the present invention.
In FIG. 1, the vehicle speed detection device 1 is provided at an end portion of an axle 3 with wheels 2 fixed at both ends, and a speed generator 6 serving as a first detection means for detecting the rotational speed of the axle 3. have.
The vehicle speed detection device 1 is provided at one end of a rotating shaft of an electric motor 4 that is a power generation unit that supplies power to the axle 3 via a first spur gear 16 and a second spur gear 5. A speed generator 7 serving as second detection means for detecting the rotational speed of the rotating shaft of the electric motor 4 is provided.
The first spur gear 16 fixed to the other end of the rotating shaft of the electric motor 4 and the second spur gear 5 fixed to the axle 3 constitute a power transmission mechanism.
Here, the wheel shaft 13 is constituted by the wheel 2 and the axle 3.

速度発電機６、７は、磁石が埋め込まれた歯車が設けられた車軸３が回転し、その回転によって、歯車と歯車に対向して設けられたコイルとの間で磁束密度が変化してコイルに誘起電圧が発生し、その誘起電圧に基づいて回転速度を演算出力するものである。   In the speed generators 6 and 7, the axle 3 provided with the gear in which the magnet is embedded is rotated, and the rotation causes the magnetic flux density to change between the gear and the coil provided facing the gear. An induced voltage is generated in the motor, and the rotational speed is calculated and output based on the induced voltage.

また、この車両用速度検出装置１は、速度発電機６および速度発電機７に接続され、第１の回転速度である輪軸１３の回転速度と第２の回転速度である電動機４の回転速度との差異を検出する差異検出手段８と、差異検出手段８の出力に基づいて、電動機４の駆動を制御する制御装置９に停止指令を出力する指令手段１０とを備えている。   The vehicle speed detection device 1 is connected to the speed generator 6 and the speed generator 7, and the rotation speed of the wheel shaft 13 that is the first rotation speed and the rotation speed of the electric motor 4 that is the second rotation speed. Difference detecting means 8 for detecting the difference between the two and a command means 10 for outputting a stop command to the control device 9 for controlling the driving of the electric motor 4 based on the output of the difference detecting means 8.

以下、上記構成の車両用速度検出装置１についての動作を説明する。
まず、電動機４で発生した動力は、第１の平歯車１６および第２の平歯車５を介して車軸３に伝達され、車輪２を回転させる。
同時に、速度発電機６は、第１の回転速度を検出し、速度発電機７は、第２の回転速度を検出する。
続いて、第１の回転速度と第２の回転速度とは、差異検出手段８で比較される。 Hereinafter, the operation of the vehicle speed detection device 1 having the above-described configuration will be described.
First, the power generated by the electric motor 4 is transmitted to the axle 3 via the first spur gear 16 and the second spur gear 5 to rotate the wheel 2.
At the same time, the speed generator 6 detects the first rotation speed, and the speed generator 7 detects the second rotation speed.
Subsequently, the first rotation speed and the second rotation speed are compared by the difference detection means 8.

ここで、第１の回転速度と第２の回転速度とを比較することで、電動機４、輪軸１３、第１の平歯車１６および第２の平歯車５の何れかに生じた異常を検出することができる。
例えば、電動機４、輪軸１３、第１の平歯車１６および第２の平歯車５の何れにも異常がない場合、第１の回転速度と第２の回転速度とは、それぞれ第１の平歯車１６および第２の平歯車５の比に応じた一定の値を示している。
しかしながら、電動機４、輪軸１３、第１の平歯車１６および第２の平歯車５の何れかに異常が生じた場合、第１の回転速度と第２の回転速度との、それぞれ第１の平歯車１６および第２の平歯車５の比に応じた一定の値の間に差異が生じる。
このとき、差異検出手段８から出力された第１の回転速度と第２の回転速度との差異が、指令手段１０に設定された値を越えたとき、指令手段１０は、電動機４の制御装置９に対して、停止の指令を発して、電動機４を停止させる。 Here, by comparing the first rotation speed and the second rotation speed, an abnormality occurring in any of the electric motor 4, the wheel shaft 13, the first spur gear 16 and the second spur gear 5 is detected. be able to.
For example, when there is no abnormality in any of the electric motor 4, the wheel shaft 13, the first spur gear 16, and the second spur gear 5, the first rotational speed and the second rotational speed are respectively the first spur gear. A constant value corresponding to the ratio of the 16 and the second spur gear 5 is shown.
However, when an abnormality occurs in any of the electric motor 4, the wheel shaft 13, the first spur gear 16, and the second spur gear 5, the first spur speed and the second spur speed are respectively set to the first spur speed. There is a difference between certain values depending on the ratio between the gear 16 and the second spur gear 5.
At this time, when the difference between the first rotation speed and the second rotation speed output from the difference detection unit 8 exceeds a value set in the command unit 10, the command unit 10 controls the motor 4. A stop command is issued to 9 to stop the motor 4.

この発明の実施の形態１に係る車両用速度検出装置１によれば、速度発電機６を車軸３の端部に設け、速度発電機７を電動機４の端部に設け、第１の回転速度と第２の回転速度とを差異検出手段８で比較することができるので、回転速度の差異に基づいて、電動機４、輪軸１３、第１の平歯車１６および第２の平歯車５の何れかに異常が生じたことを検知することができる。
また、差異検出手段８の出力に基づいて指令手段１０が電動機４の停止指令を出力することもできる。 According to the vehicle speed detection device 1 according to the first embodiment of the present invention, the speed generator 6 is provided at the end of the axle 3, the speed generator 7 is provided at the end of the electric motor 4, and the first rotational speed is set. And the second rotational speed can be compared by the difference detecting means 8, so that any one of the electric motor 4, the wheel shaft 13, the first spur gear 16, and the second spur gear 5 is based on the difference in rotational speed. It is possible to detect that an abnormality has occurred.
Further, the command means 10 can output a stop command for the electric motor 4 based on the output of the difference detection means 8.

なお、上記の説明において、動力発生部は電動機４であるとしたが、勿論このものに限定されるものではなく、例えば内燃動力機関であってもよい。この場合の構成を図２に示す。
ここで、エンジン本体１４とクランクシャフト１１とにより、動力発生部である内燃動力機関は構成されており、クランクシャフト１１に第１の検出手段である速度発電機７が取り付けられている。
また、クランクシャフト１１の端部に固定された第１の傘歯車１７と、車軸３に固定された第２の傘歯車１８とにより、動力伝達機構を構成している。
この構成においても、第１の回転速度と第２の回転速度とを差異検出手段８で比較することができるので、エンジン本体１４、輪軸１３、第１の傘歯車１７および第２の傘歯車１８の何れかに異常が生じたことを検知することができる。 In the above description, the power generation unit is the electric motor 4. However, the present invention is of course not limited to this, and may be, for example, an internal combustion power engine. The configuration in this case is shown in FIG.
Here, the engine main body 14 and the crankshaft 11 constitute an internal combustion power engine that is a power generation unit, and the speed generator 7 that is the first detection means is attached to the crankshaft 11.
The first bevel gear 17 fixed to the end of the crankshaft 11 and the second bevel gear 18 fixed to the axle 3 constitute a power transmission mechanism.
Also in this configuration, the first rotation speed and the second rotation speed can be compared by the difference detection means 8, so that the engine main body 14, the wheel shaft 13, the first bevel gear 17 and the second bevel gear 18 can be compared. It is possible to detect that an abnormality has occurred in any of the above.

実施の形態２．
図３は、この発明の実施の形態２に係る車両用速度検出装置１を示す構成図である。
図３において、この車両用速度検出装置１は、実施の形態１で示したものに加えて、差異出力手段１２を有している。その他の構成については、実施の形態１と同様であり、その説明は省略する。 Embodiment 2. FIG.
FIG. 3 is a block diagram showing a vehicle speed detection device 1 according to Embodiment 2 of the present invention.
In FIG. 3, the vehicle speed detection device 1 includes difference output means 12 in addition to the one shown in the first embodiment. Other configurations are the same as those of the first embodiment, and the description thereof is omitted.

以下、上記構成の車両用速度検出装置１について、第１の回転速度と第２の回転速度とが一致しない場合の動作を説明する。
差異検出手段８から出力された第１の回転速度と第２の回転速度との差異が差異出力手段１２に設定された値を越えたとき、差異出力手段１２は、外部装置（図示せず）に異常を知らせる信号を出力する。
ここで、信号が出力される外部装置は、運転台に設けられた表示灯であってもよいし、運転状態を記憶するデータベースであってもよい。 Hereinafter, the operation in the case where the first rotation speed and the second rotation speed do not match in the vehicle speed detection device 1 having the above-described configuration will be described.
When the difference between the first rotation speed and the second rotation speed output from the difference detection means 8 exceeds the value set in the difference output means 12, the difference output means 12 is connected to an external device (not shown). Outputs a signal to notify the abnormality.
Here, the external device from which the signal is output may be an indicator lamp provided in the cab or a database that stores the operation state.

この発明の実施の形態２に係る車両用速度検出装置１によれば、異常を知らせる信号を表示灯やデータベースなどの外部装置に出力することができるので、運転士は異常を知ることができ、ブレーキ操作等の処置をとることができる。
また、データベースに信号を出力することができるので、運転状態を後から確認することができる。 According to the vehicle speed detection device 1 according to the second embodiment of the present invention, since a signal notifying the abnormality can be output to an external device such as an indicator lamp or a database, the driver can know the abnormality, Measures such as brake operation can be taken.
In addition, since a signal can be output to the database, the operation state can be confirmed later.

なお、指令手段１０の設定値と差異出力手段１２の設定値とは、それぞれ変更することができる。
ここで、指令手段１０の設定値と差異出力手段１２の設定値とを相互に調整することにより、例えば、第１の回転速度と第２の回転速度との差異が指令手段１０の設定値に達して電動機４に停止指令を出力する前に、差異出力手段１２により運転士に警報を与え、運転士の注意を喚起するというように、運転士に表示する情報を変えることができる。 Note that the setting value of the command means 10 and the setting value of the difference output means 12 can be changed.
Here, by adjusting the set value of the command means 10 and the set value of the difference output means 12, for example, the difference between the first rotation speed and the second rotation speed becomes the set value of the command means 10. Before reaching and outputting a stop command to the motor 4, the difference output means 12 can alert the driver and alert the driver so that the information displayed to the driver can be changed.

実施の形態３．
図４は、この発明の実施の形態３に係る車両用速度検出装置１を示す構成図である。
図４において、速度発電機７は、電動機４の駆動を制御する制御装置９に設けられた速度検知手段であるセンサレス回転速度検出装置１５である。
センサレス回転速度検出装置１５は、制御装置９から電動機４に出力した電圧情報および電流情報に基づいて、電動機４の回転軸の位置情報を演算し、位置情報を回転速度に変換するものである。 Embodiment 3 FIG.
FIG. 4 is a block diagram showing a vehicle speed detection device 1 according to Embodiment 3 of the present invention.
In FIG. 4, the speed generator 7 is a sensorless rotation speed detection device 15 that is a speed detection means provided in the control device 9 that controls the drive of the electric motor 4.
The sensorless rotation speed detection device 15 calculates position information of the rotating shaft of the electric motor 4 based on voltage information and current information output from the control device 9 to the electric motor 4, and converts the position information into rotation speed.

この発明の実施の形態３に係る車両用速度検出装置１によれば、制御装置９から電動機４に出力した電圧情報および電流情報に基づいて回転速度を検知することができるので、電動機４の端部に速度発電機７を別途設ける必要がなく、コストダウンを図ることができる。   According to the vehicle speed detection device 1 according to the third embodiment of the present invention, the rotational speed can be detected based on the voltage information and the current information output from the control device 9 to the electric motor 4, so that the end of the electric motor 4 can be detected. It is not necessary to separately provide the speed generator 7 in the part, and the cost can be reduced.

なお、実施の形態１〜３では、動力伝達機構として、第１の平歯車１６および第２の平歯車５を用いて説明したが、動力伝達機構はベルトやチェーン等であってもよい。
また、第１の検出手段および第２の検出手段は、速度発電機６、７であるとしたが、勿論このものに限定されるものではなく、車軸に凹凸やスリットを設け、車軸に対向して設けられた光送受信機から車軸に光を照射し、反射に要する時間や反射の有無を読み取って、回転速度を演算出力する光エンコーダであってもよい。
さらに、速度発電機６、７は、必ずしも車軸３に設けられる必要はなく、車輪２に設けられていてもよい。 In the first to third embodiments, the first spur gear 16 and the second spur gear 5 are used as the power transmission mechanism. However, the power transmission mechanism may be a belt, a chain, or the like.
In addition, the first detection means and the second detection means are the speed generators 6 and 7, but of course the invention is not limited to this, and the axle is provided with irregularities and slits so as to face the axle. An optical encoder that irradiates light to the axle from an optical transmitter / receiver provided, reads the time required for reflection and the presence / absence of reflection, and calculates and outputs the rotational speed.
Furthermore, the speed generators 6 and 7 are not necessarily provided on the axle 3 and may be provided on the wheel 2.

この発明の実施の形態１に係る車両用速度検出装置を示す構成図である。It is a block diagram which shows the vehicle speed detection apparatus which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る車両用速度検出装置を示す別の構成図である。It is another block diagram which shows the vehicle speed detection apparatus which concerns on Embodiment 1 of this invention. この発明の実施の形態２に係る車両用速度検出装置を示す構成図である。It is a block diagram which shows the vehicle speed detection apparatus which concerns on Embodiment 2 of this invention. この発明の実施の形態３に係る車両用速度検出装置を示す構成図である。It is a block diagram which shows the vehicle speed detection apparatus which concerns on Embodiment 3 of this invention.

符号の説明Explanation of symbols

１ 車両用速度検出装置、２ 車輪、３ 車軸、４ 電動機（動力発生部）、６ 速度発電機（第１の検出手段）、７ 速度発電機（第２の検出手段）、８ 差異検出手段、９ 制御装置、１０ 指令手段、１２ 差異出力手段、１３ 輪軸、１４ エンジン本体、１５ センサレス回転速度検出装置（第２の検出手段）。   1 speed detector for vehicle, 2 wheels, 3 axles, 4 electric motor (power generation unit), 6 speed generator (first detection means), 7 speed generator (second detection means), 8 difference detection means, 9 control device, 10 command means, 12 difference output means, 13 wheel shaft, 14 engine body, 15 sensorless rotation speed detection device (second detection means).

Claims (5)

車両の輪軸の回転速度を検出する第１の検出手段と、
前記輪軸の駆動源である動力発生部の回転速度を検出する第２の検出手段と、
前記第１の検出手段で検出した第１の回転速度と、前記第２の検出手段で検出した第２の回転速度との差異を検出する差異検出手段と
を備えたことを特徴とする車両用速度検出装置。 First detecting means for detecting the rotational speed of the wheel shaft of the vehicle;
Second detection means for detecting a rotational speed of a power generation unit that is a driving source of the wheel shaft;
A vehicle having a difference detecting means for detecting a difference between the first rotational speed detected by the first detecting means and the second rotational speed detected by the second detecting means; Speed detection device. 前記差異に基づいて、前記動力発生部の停止指令を出力する指令手段を備えたことを特徴とする請求項１に記載の車両用速度検出装置。   The vehicle speed detection device according to claim 1, further comprising command means for outputting a stop command for the power generation unit based on the difference. 前記差異を外部に出力する差異出力手段を備えたことを特徴とする請求項１または請求項２に記載の車両用速度検出装置。   The vehicle speed detection device according to claim 1, further comprising difference output means for outputting the difference to the outside. 前記第２の検出手段は、前記動力発生部の駆動軸に設けられていることを特徴とする請求項１から請求項３の何れか１項に記載の車両用速度検出装置。   4. The vehicle speed detection device according to claim 1, wherein the second detection unit is provided on a drive shaft of the power generation unit. 5. 前記第２の検出手段は、前記動力発生部の駆動を制御する制御装置に設けられ、前記動力発生部に出力した制御情報に基づいて、前記第２の回転速度を検知する速度検知手段であることを特徴とする請求項１から請求項３の何れか１項に記載の車両用速度検出装置。   The second detection unit is a speed detection unit that is provided in a control device that controls driving of the power generation unit and detects the second rotation speed based on control information output to the power generation unit. The vehicle speed detection device according to claim 1, wherein the vehicle speed detection device is a vehicle speed detection device.
JP2005002626A 2005-01-07 2005-01-07 Speed detection system for vehicle Pending JP2006189371A (en)

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