JP2007322441A - Abnormality detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality detector that can pursue the miniaturization and weight reduction, can improve the durability to an external condition such as external vibration, ambient environmental temperature, or the like, and is suitable for abnormality detection of a rolling member mounted on a moving facility. <P>SOLUTION: A sensor unit having only a physical quantity detecting element for detecting the physical quantity in the rolling operation of the rolling member of a moving body is disposed. The sensor unit is separated from a signal processing circuit for applying predetermined processing to an output signal of the physical quantity detecting element, and mounted to a mechanism component of the rolling member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention, for example, a sensor unit for detecting a physical quantity of a rolling member such as a rolling bearing incorporated in a moving equipment such as a railway vehicle, and determining whether there is an abnormality in the rolling member based on the physical quantity detected by the sensor unit. In particular, the present invention relates to improvements to make the apparatus compact and to improve durability against external vibration.

In a rolling member such as a rolling bearing, wear and damage of components appear as changes in physical quantities such as vibration and temperature during operation.
Therefore, conventionally, as an abnormality detection device for determining the presence or absence of an abnormality of a rolling bearing mounted on a mechanical facility or the like, a vibration detecting element such as an acceleration sensor that detects vibration as a physical quantity during operation of the rolling bearing and outputs it as an electrical signal. And a signal processing circuit that performs filter processing, amplification processing, waveform shaping processing, signal digitization processing, etc. on the output signal of the vibration detection element and outputs the result as an actual measurement digital signal, and an actual measurement output from the signal processing circuit The thing of the structure provided with the computer as a control apparatus which determines the presence or absence of abnormality in a rolling member by implementing a regular evaluation process with respect to a digital signal is proposed (for example, refer patent document 1).

JP-A-3-221354

  However, conventional abnormality detection devices are generally based on the premise that the equipment to be judged for the presence or absence of abnormality is mechanical equipment that is fixedly installed in a building. It is difficult to divert as it is.

  For example, when the equipment for installing an abnormality detection device is a vehicle, etc., unlike the case of mechanical equipment fixedly installed in a building, external vibration applied to the vehicle body from the road surface, etc. during traveling is applied to the abnormality detection device. It is important to improve the mounting strength of the components and to select components with high vibration resistance so that each component of the detector will not drop off or be damaged by external vibration. .

  In addition, the equipment installed in the building is usually designed at an ambient temperature of 5 to 50 ° C. However, in a vehicle or the like traveling outdoors, the ambient environment temperature is -20 to 100 ° C. There is a possibility, and it is necessary to review the durability of each part used for the abnormality detection equipment against the ambient temperature.

  In addition, in order to suppress an increase in unsprung load that hinders the running performance of the vehicle, it is important to make the vibration detection element and the like equipped in the unsprung rolling bearing and the like compact and lightweight.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a sensor unit and an abnormality detection device suitable for detecting an abnormality of a rolling member mounted on a moving facility. That is, the physical quantity detection element mounted on the unsprung rolling member or the like in a moving facility such as a vehicle, as a single unit, pursues downsizing and weight reduction, and the unsprung load that hinders the traveling performance of the moving facility. Sensor unit and mobile equipment abnormality detection that can suppress the increase, have high durability against external vibration and ambient temperature acting on the mobile equipment, and can maintain stable abnormality detection processing in the mobile equipment for a long time To provide an apparatus.

  The above object is achieved by the following configurations.

(1) It has only a physical quantity detection element for detecting a physical quantity at the time of rolling operation of the rolling member of the moving body,
A sensor unit, wherein the sensor unit is separate from a signal processing circuit that performs a predetermined process on an output signal of the physical quantity detection element, and is attached to a mechanical component of the rolling member.
(2) The sensor unit according to (1), wherein the physical quantity detection element is a vibration sensor that detects vibration generated during a rolling operation of the rolling member.
(3) The sensor unit according to (1), wherein the physical quantity detection element is a temperature sensor that detects a temperature of the rolling member or the vicinity thereof.
(4) a sensor unit having a physical quantity detection element for detecting a physical quantity during the rolling operation of the rolling member of the moving body;
A signal processing circuit for performing predetermined processing on the output signal of the physical quantity detection element;
A control device that performs abnormality determination of the rolling member based on an output signal of the signal processing circuit, and an abnormality detection device for mobile equipment comprising:
The abnormality detection device for moving equipment, wherein the sensor unit is separate from the signal processing circuit and the control device and is attached to a mechanical component of the rolling member.
(5) The abnormality detection device for mobile equipment according to (4), wherein the capacitor mounted on the signal processing circuit is a ceramic capacitor.
(6) The abnormality detection device for mobile equipment according to (4) or (5), wherein the signal processing circuit is a separate relay unit attached to the mobile equipment independently of the control device. .
(7) Any one of (4) to (6), wherein the moving facility is a railway vehicle, and the rolling member is a rolling bearing device that supports a rotating shaft mounted on the railway vehicle. An abnormality detection device for mobile equipment as described in 1.
(8) The mobile equipment according to any one of (4) to (7), wherein the physical quantity detection element is a vibration sensor that detects vibration generated during a rolling operation of the rolling member. Abnormality detector.
(9) The abnormality detection for mobile equipment according to any one of (4) to (7), wherein the physical quantity detection element is a temperature sensor that detects a temperature of the rolling member or the vicinity thereof. apparatus.
(10) The abnormality detection device for mobile equipment according to any one of (4) to (9), wherein the signal processing circuit and the control device are integrally configured.

Here, the above-mentioned moving equipment means vehicles such as railway vehicles and automobiles, portable VTR devices, and portable personal computers. The term “rolling member” also includes a linear rolling member that rolls on a linear surface in addition to a rotating rolling member that performs rolling such as rotation. This corresponds to a component such as a bearing or a component of a linear motion mechanism such as a ball screw or a linear guide.
Further, the physical quantity at the time of rolling operation of the rolling member is a physical quantity that changes according to the rolling state such as rotation or linear movement of the rolling member, for example, sound or vibration generated by the rolling member, The number of revolutions, temperature, and distortion generated on the rolling member components are considered.

According to the sensor unit and the moving equipment abnormality detecting device of the present invention, the physical quantity detecting element is separated from the signal processing circuit and the control device to be a single sensor unit. Therefore, the physical quantity detecting element is attached to the moving equipment. In pursuit of compactness and weight reduction, including the structure, even when a sensor unit is assembled to an unsprung rolling member in a moving facility such as a vehicle, an increase in unsprung load that hinders the traveling performance of the moving facility is suppressed. can do.
In addition, the unsprung parts of the vehicle and the like are exposed to the outside air, and the vibration acting from the running track etc. acts directly when the vehicle is running, so external conditions such as external vibration and ambient environment temperature become severe, but physical quantity detection Since the element is housed in a dedicated mounting case, the external case can be used to moderate the external conditions appropriately, improving the durability of the physical quantity detection element against external conditions such as external vibration and ambient temperature. As a result, a stable abnormality detection process can be maintained for a long time in the mobile equipment.
Furthermore, since the signal processing circuit and the control device are separate units separated from the sensor unit, select a part where a severe external condition does not act on the moving equipment as the installation position away from the sensor unit mounting position. It is possible to suppress the influence of external conditions on the signal processing circuit and the control device, and to improve the operational stability of these signal processing circuit and the control device.

Further, according to the present invention, in the signal processing circuit, the shock resistance of the capacitor itself and the resistance to the ambient temperature are improved as compared with the conventional case in which an electrolytic capacitor using a trimmer, tantalum or aluminum is mounted. To do.
Therefore, even if the signal processing circuit is arranged close to the physical quantity detection element installed at a position where the external conditions are severe, it is possible to prevent inconvenience such as malfunction or damage of the capacitor due to the influence of the external conditions.
And, by arranging the signal processing circuit close to the physical quantity detection element, the signal transmission path length between the physical quantity detection element and the signal processing circuit is shortened, and the deterioration of the detection accuracy due to the influence of external noise is prevented. Can contribute to improving the accuracy of abnormality detection processing.

In addition, according to the present invention, the signal processing circuit can be properly protected from external conditions such as external vibration and ambient temperature due to the dedicated mounting case, so that the position of the signal processing circuit can be relatively easy. In addition, it can be installed near the sensor unit, and the layout design of the sensor unit and the relay unit is facilitated.
In addition, since the physical quantity detection element, the signal processing circuit, and the control device are equipped as independent units, each mounting case that accommodates them is insulated according to the external conditions at each mounting position. Therefore, it is possible to individually set the properties, vibration resistance, and the like, and to prevent excessive quality that causes an increase in cost for each mounting case, thereby reducing the cost of the entire apparatus.

In addition, according to the present invention, particularly when the moving equipment is a railway vehicle and the rolling member is a rolling bearing device that supports a rotating shaft such as an axle mounted on the railway vehicle, the size reduction and external conditions are achieved. The effects of the present invention, such as improving the tolerance of the, become useful.
Further, in terms of downsizing the sensor unit, it is preferable that only the vibration detection element is accommodated in the attachment case as the physical quantity detection element, or only the temperature detection element is accommodated in the attachment case as the physical quantity detection element.
By doing so, the number of physical quantity detection elements can be minimized and the size can be reduced to the maximum.

  Hereinafter, a mobile equipment abnormality detection apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment)
FIG. 1 to FIG. 3 show a first embodiment of an abnormality detection apparatus for mobile equipment according to the present invention. FIG. 1 is a schematic configuration diagram of the abnormality detection apparatus for mobile equipment according to the first embodiment, and FIG. FIG. 3 is an explanatory diagram of a configuration example of the signal processing circuit shown in FIG. 1. FIG. 3 is a cross-sectional view of the main part of the vehicle bearing portion to which the sensor unit shown in FIG.

  The abnormality detection device 1 for moving equipment is a physical quantity detection element that is assembled to the components of the rolling member 5 mounted on the moving equipment 3 and detects a physical quantity during the rolling operation of the rolling member 5 and outputs it as an electrical signal. 7, a signal processing circuit 9 that performs filter processing, amplification processing, waveform shaping processing, signal digitization processing, and the like on the output signal of the physical quantity detection element 7 and outputs it as an actual measurement digital signal, and the signal processing circuit 9 A prescribed evaluation process (for example, an evaluation process based on comparison with a reference signal sampled through the physical quantity detection element 7 and the signal processing circuit 9 during normal operation of the rolling member 5) is performed on the actually measured digital signal output by Thus, a control device 11 that determines whether there is an abnormality in the rolling member 5, a cable 13 as a signal transmission path that passes the output signal of the physical quantity detection element 7 to the signal processing circuit 9, and a signal A configuration in which a signal transmission line 15 to pass the output measured digital signals to the controller 11 of the processing circuit 9.

In this embodiment, the moving equipment 3 is a railway vehicle, and the rolling member 5 is a tapered roller bearing device that rotatably supports an axle 21 of the railway vehicle.
Moreover, in this embodiment, as shown in FIG. 2, the tapered roller bearing device as the rolling member 5 has an outer periphery in the inner ring 22 in which the axle 21 is fitted to the inner periphery and the axle box 23 in which the axle 21 is inserted. The outer ring 24 to be fitted, the tapered rollers 25 as a plurality of rolling elements disposed between the inner and outer rings so as to freely roll, the cage 26 for holding the tapered rollers 25, and the ends of the inner and outer rings are sealed. A sealing device 27, an annular ring 28 that contacts the end of the inner ring 22 for positioning the inner ring 22 in the axial direction, and an annular ring 28 that is screwed to the end of the axle 21 and pressed against the inner ring 22 side. The tightening nut 29 is provided.
The outer ring 24 is equipped with a detachable lid 24 a so as to cover the end of the axle 21.

The physical quantity at the time of the rolling operation of the rolling member 5 is a physical quantity that changes according to the rotation state during the rotational operation of the tapered roller bearing. For example, the sound and vibration generated by the tapered roller bearing, The temperature, the distortion etc. which arise on the component of the rolling member 5 can be considered. However, in this embodiment, only the vibration is the detection target as the physical quantity during the rolling operation of the rolling member 5.
Therefore, the physical quantity detection element 7 to be equipped is only the vibration detection element.

In the case of this embodiment, the vibration detection element which is the only physical quantity detection element 7 is housed in a dedicated mounting case 17 separately from the signal processing circuit 9 and the control device 11 as shown in FIGS. Apart from the signal processing circuit 9 and the control device 11, an independent sensor unit 31 that can be fixed to the lid 24a, which is a component of the rolling member 5, is provided.
The sensor unit 31 is attached to a lid 24 a of a bearing device as the rolling member 5.

  As the physical quantity detection element 7, the vibration detection element accommodated in the mounting case 17 uses a piezoelectric element (specifically, various types such as a bimorph type, a cantilever type, an annular type, etc., which have a double-supported beam structure). Various types can be used, such as a strain gauge type, a capacitance type, a piezoresistive type, a type utilizing micromachining, and a packaged IC package.

In the present embodiment, the signal processing circuit 9 and the control device 11 are accommodated in one mounting case 19 so as to be handled as an integrated processing unit 18.
As the control device 11, a general-purpose personal computer capable of executing an evaluation process with a predetermined program, or a one-chip or one-board type microcomputer in which an evaluation program is incorporated in advance is used.

FIG. 3 shows an amplification circuit mounted on the signal processing circuit 9 in order to convert the physical quantity detection element 7 into a voltage output from the charge output of the output signal.
This amplifier circuit amplifies and outputs the output voltage of the physical quantity detection element 7 by the operational amplifier 36, and the terminal of the physical quantity detection element 7 is connected to the positive terminal and the negative terminal of the operational amplifier 36.
A resistor R1 and a capacitor C1 are connected in parallel between the negative terminal of the operational amplifier 36 and the output contact.
In the case of this embodiment, the capacitors mounted on the signal processing circuit 9 are all ceramic capacitors, including the capacitor C1 on the differential amplifier circuit, and electrolytic capacitors using trimmers, tantalum or aluminum are used. Not.

In the mobile facility abnormality detection device 1 described above, the physical quantity detection element 7 is separated from the signal processing circuit 9 and the control device 11 to form a single unit 31, so that the physical quantity detection element 7 is connected to the mobile equipment 3. In pursuit of downsizing and weight reduction including the mounting structure, unsprung load that hinders the running performance of the moving equipment 3 even when the sensor unit is assembled to the unsprung rolling member 5 or the like in the moving equipment 3 such as a vehicle. Can be suppressed.
In addition, the unsprung parts of the vehicle and the like are exposed to the outside air, and the vibration acting from the running track etc. acts directly when the vehicle is running, so external conditions such as external vibration and ambient environment temperature become severe, but physical quantity detection Since the element 7 is accommodated in a dedicated mounting case 17, the mounting case 17 can appropriately reduce those external conditions, and the physical quantity detection element 7 with respect to external conditions such as external vibration and ambient temperature can be used. Durability can be improved, and as a result, stable abnormality detection processing can be maintained for a long time in the mobile equipment 3.

  Furthermore, since the signal processing circuit 9 and the control device 11 become another unit 18 separated from the sensor unit 31, it is separated from the mounting position of the sensor unit 31, and a part where severe external conditions do not act on the mobile equipment 3. Can be selected as the installation position, the influence of external conditions on the signal processing circuit 9 and the control device 11 can be suppressed, and the operational stability of the signal processing circuit 9 and the control device 11 can be improved.

Further, in the signal processing circuit 9, all the capacitors used are ceramic capacitors, and compared with the conventional case in which an electrolytic capacitor using a trimmer, tantalum or aluminum is mounted, the shock resistance of the capacitor itself and the ambient environment temperature. Improves resistance to
Therefore, even if the signal processing circuit 9 is arranged close to the physical quantity detection element 7 installed at a position where the external conditions are severe, it is possible to prevent inconveniences such as malfunction and damage of the capacitor due to the external conditions. it can.
By disposing the signal processing circuit 9 close to the physical quantity detection element 7, the signal transmission path length between the physical quantity detection element 7 and the signal processing circuit 9 is shortened, and the detection accuracy is reduced due to the influence of external noise. Can be prevented and contribute to improving the accuracy of the abnormality detection process.

Accordingly, it is possible to make a highly accurate determination over a long period of time with respect to the presence or absence of an abnormality in the rolling bearing of the railway vehicle as the moving equipment 3 with a compact device configuration.
Further, by limiting the physical quantity detection element 7 to be provided only to the vibration detection element, the number of physical quantity detection elements 7 can be minimized and the size can be reduced to the maximum.

  Further, the signal processing circuit 9 is not limited to the conversion to a digital signal, performs analog signal processing to output an analog signal, or performs A / D conversion on the output of the physical quantity detection element 7 to perform digital signal processing and output. You may do. The signal processing circuit 9 performs signal processing on the output signal of the physical quantity detection element 7 in accordance with the input of the control device 11, and can be configured to perform various processes in accordance with the input.

  The control device 11 is not limited to the above, and performs abnormality detection by performing FFT processing and envelope processing of the output signal, performs comparison processing using an analog signal as an input signal, or digital signal by A / D conversion. An abnormality diagnosis may be performed by performing a comparison process after the conversion to. That is, the control device 11 only needs to be able to detect an abnormality using the output signal from the signal processing circuit 9 as an input signal.

(Second Embodiment)
FIG. 4 shows a schematic configuration of a second embodiment of the abnormality detection device for mobile equipment according to the present invention.
The moving equipment abnormality detection device 41 according to the second embodiment is configured to detect only the temperature as a physical quantity at the time of the rolling operation of the rolling member 5, and is accommodated in the mounting case 17 of the sensor unit 31. Except for the point that the physical quantity detection element is replaced with the temperature detection element 42, everything is the same as in the first embodiment.
Common components are given the same numbers, and descriptions thereof are omitted.

  Also in the case of this embodiment, the sensor unit 31 is equipped with only the temperature detection element 42 as the physical quantity detection element. By minimizing the number of physical quantity detection elements, the sensor unit 31 is similar to the first embodiment. The structure is suitable for pursuing 31 compactness.

  In addition, as a temperature detection element accommodated in the attachment case 17 as a physical quantity detection element, specifically, various thermistors such as NTC, PTC, CTR, and silicon, a resistance temperature detector (temperature resistance), a platinum resistance, and a temperature IC Etc. can be used.

In the above embodiment, only one physical quantity detection element is provided in the sensor unit 31. However, a plurality or types of physical quantity detection elements may be provided in the sensor unit 31.
For example, a configuration including both a vibration detection element and a temperature detection element, or a rotation detection element can be added to further increase the types of physical quantities to be detected. The number of equipment can be arbitrarily adjusted according to the required detection accuracy.

  In addition, the rotation detecting element that detects the rotation amount as a physical quantity during the operation of the rolling member can use a Hall effect (Hall element, Hall IC, etc.) or a magnetic resistance (MR element, etc.). .

  When measuring vibrations in two or more directions, a vibration detection element that can detect in multiple directions with one element may be selected, or two or more vibration detection elements that detect unidirectional vibration may be provided. May be.

  When detecting the rotational speed and direction of the axle, either process the teeth on the axle, or attach a permanent magnet (plastic magnet or rubber magnet) magnetized with multiple poles to the opposite location. What is necessary is just to arrange | position a detection element facing.

(Third embodiment)
FIG. 5 shows a third embodiment of the abnormality detector for mobile equipment according to the present invention.
This mobile equipment abnormality detection device 44 accommodates the signal processing circuit 9 in a dedicated mounting case 46 separately from the control device 11, and is an independent relay unit 47 that can be attached to the mobile equipment 3 separately from the control device 11. As a result, the control device 11 also becomes an independent control unit 49. As described above, the configuration other than the point that the signal processing circuit 9 and the control device 11 are separate units is the same as that of the first embodiment. As a result, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the configuration of the third embodiment, the signal processing circuit 9 can receive appropriate protection from external conditions such as external vibration and ambient temperature by the dedicated mounting case 46. It is possible to install the sensor unit 31 near the sensor unit 31 relatively easily, and the layout design of the sensor unit 31 and the relay unit 47 is facilitated.
In addition, since the physical quantity detection element 7, the signal processing circuit 9, and the control device 11 are provided as units 47 and 49 that are independent from each other, each mounting case that accommodates them has an external condition at each mounting position. The heat insulation, vibration resistance, etc. can be set individually according to the above, and it is possible to prevent excessive quality that increases costs for each mounting case, and to reduce the cost of the entire device Can do.

  When the signal transmission path 15 between the relay unit 47 and the control unit 49 is long, the impedance of the signal transmission path 15 is set to be small in order to reduce the influence of noise and the error of the output signal, or It is better to devise such as converting the output signal into a current output.

When the above-described abnormality detection device for mobile equipment 44 according to the third embodiment is used for abnormality detection of a rolling bearing for an axle of a railway vehicle as the mobile equipment 3, the sensor unit 31, the relay unit 47, and the control unit 49 described above. Is preferably arranged as shown in FIG.
The sensor unit 31 is arranged for each bearing device at a position closer to the bearing device on the carriage 51 on which the wheels and the axle are mounted so that the physical quantity of the bearing device which is a rolling member can be detected sharply. 47 is provided on the vehicle body 53 away from the carriage 51 so as not to be included in the unsprung load and to weaken the influence of external conditions such as vibration of the carriage 51 and ambient temperature during vehicle travel. Furthermore, the control unit 49 is preferably arranged in the center of the vehicle interior 55, which is less susceptible to external conditions.
With this arrangement, the cable 13 between the sensor unit 31 and the relay unit 47 can be shortened so as not to be affected by external noise, and the S / N of the detection signal from the sensor unit 31 can be reduced. By improving the ratio, it is possible to improve the accuracy of determining whether there is an abnormality.

As shown in FIG. 6, the number of relay units 47 installed is one for each carriage 51, and one relay unit 47 processes signals from a plurality of sensor units 31 equipped on the same carriage 51. By doing so, the number of relay units 47 can be reduced, and the apparatus configuration can be simplified and the cost can be reduced.
However, the relay unit 47 may be individually provided for each sensor unit 31.
Further, one control unit 49 is provided for each vehicle body 53. However, if there is a margin in processing capacity, one control unit 49 may be provided for each of a plurality of vehicle bodies. good.

(Fourth embodiment)
FIG. 7 shows a fourth embodiment of the abnormality detector for mobile equipment according to the present invention.
The mobile equipment abnormality detection device 61 of this embodiment is a further improvement of the mobile equipment abnormality detection device 44 of the third embodiment shown in FIG. 5, and the output signal of the signal processing circuit 9 is wirelessly transmitted to the relay unit 47. A wireless transmission circuit 63 is provided, and the control unit 49 is equipped with a wireless reception circuit 65 that receives an output signal of the wireless transmission circuit 63 and passes it to the control device 11. Signal transmission between them is made wireless.
By doing in this way, the cable wiring for long distance becomes unnecessary and the installation work process of the abnormality detection apparatus 61 for moving facilities can be reduced significantly. In addition, it is possible to avoid the occurrence of inconvenience due to cable disconnection or the like and to facilitate maintenance.

The installation position of the sensor unit 31 is not limited to the lid 24a. For example, the axle box 23 or the sealing device 27 may be equipped. When the sensor unit 31 is provided in the sealing device 27, the mounting space is small and the strength is small compared to the axle box 23 and the lid 24a. Therefore, the necessity for downsizing is high, and the effects of the present invention are fully utilized. be able to.
Moreover, it is not restricted to the form assembled | attached directly to the component (For example, said cover 24a of a bearing apparatus in said example.) Like each said embodiment. It is only necessary to detect a physical quantity generated during the operation of the rolling member 5, and the equipment position may be set to an appropriate mechanical component on the moving equipment 3 that supports the rolling member 5.

  Moreover, in this embodiment, a moving installation is not restricted to the rail vehicle shown in the said embodiment. For example, a vehicle such as an automobile is also included. In addition, since the present invention can be applied not only to vehicles but also to portable VTR devices and portable personal computers that are configured on-board or the like, the mobile equipment in the present invention includes these portable devices. .

  Moreover, in this embodiment, a rolling member is not restricted to the tapered roller bearing apparatus shown in the said embodiment. For example, various rolling bearing devices using rolling elements other than the tapered roller are also applicable. Furthermore, the rolling member is not limited to a bearing, and includes a linear rolling member that slides on a linear sliding contact surface in addition to a rotating rolling member that rolls by rotating a rolling element, etc. Specifically, it corresponds to a component such as a rolling bearing or a sliding bearing, or a component of a linear motion mechanism such as a ball screw or a linear guide.

It is a schematic block diagram of 1st Embodiment of the abnormality detection apparatus for mobile facilities which concerns on this invention. It is principal part sectional drawing of the vehicle bearing part which attached the sensor unit shown in FIG. It is explanatory drawing of the structural example of the signal processing circuit shown in FIG. It is a schematic block diagram of 2nd Embodiment of the abnormality detection apparatus for moving facilities which concerns on this invention. It is a schematic block diagram of 3rd Embodiment of the abnormality detection apparatus for moving facilities which concerns on this invention. It is a schematic block diagram of the vehicle which has arrange | positioned the sensor unit and relay unit shown in FIG. It is a schematic block diagram of 4th Embodiment of the abnormality detection apparatus for moving facilities which concerns on this invention.

Explanation of symbols

1 Anomaly detection equipment for mobile equipment 3 Mobile equipment (railway vehicles)
5 Rolling members (conical roller bearings)
7 Physical quantity detection element (vibration detection element)
9 Signal processing circuit 11 Control device (computer)
13 Cable (signal transmission line)
15 Signal transmission line (cable)
DESCRIPTION OF SYMBOLS 17 Installation case 18 Installation case 19 Installation case 21 Axle 31 Sensor unit 41 Abnormality detection device for moving equipment 42 Temperature detection element 44 Abnormality detection device for moving equipment 47 Relay unit 49 Control unit 51 Car 53 Car body 55 In-vehicle 61 Abnormality detection for moving equipment Device 63 Wireless transmission circuit 65 Wireless reception circuit

Claims (5)

A physical quantity detecting element for detecting a physical quantity at the time of rolling operation of the rolling member;
A signal processing circuit for performing predetermined processing on the output signal of the physical quantity detection element;
Based on the output signal of the signal processing circuit, a control device that performs abnormality determination of the rolling member;
An abnormality detection device comprising:
All the capacitors mounted on the signal processing circuit are ceramic capacitors, and are not electrolytic capacitors using tantalum and aluminum.   2. The vehicle abnormality according to claim 1, wherein the signal processing circuit is a relay unit that performs filtering, amplification, and waveform processing on an output signal of the physical quantity detection element and outputs the processed signal to the control device. Detection device.   The abnormality detection device according to claim 1, wherein the signal processing circuit converts an output signal of the physical quantity detection element into a digital signal or a current output and transmits the converted signal to the control device.   The abnormality detection device according to claim 1, wherein the signal processing circuit transmits an output signal to the control device wirelessly.   The abnormality detection device according to any one of claims 1 to 4, wherein the abnormality detection device is for mobile equipment.

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