JP2005337965A - Device system for diagnosing rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnostic device of a rotating machine, capable of measuring vibration easily. <P>SOLUTION: The device system for diagnosing the rotating machine 35 is configured so that an A/D converter which converts a sensor signal output from a sensor 30 into digital data, and a PC card controller for transmitting the data converted by the A/D converter to the side of a PDA 33 are built into a CF card 34, and a middle unit 32 where a plurality of low-pass filters having cutoff frequencies different, respectively and a boost chopper circuit generating a voltage supply for driving a detection sensor 3, based on the voltage supplied from the PDA 33 side are built in, is disposed between the detection sensor 30 and the CF card 34 and connected with them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a diagnostic apparatus system for a rotating machine for diagnosing an abnormality by detecting, for example, vibration of a bearing of the rotating machine.

For example, for a rotating machine such as an electric motor, it is diagnosed whether a mechanical abnormality has occurred in a device by measuring and analyzing vibration and noise. In a production facility configured using an electric motor or the like, preventive maintenance is very important in order to improve productivity. In particular, when mechanical damage occurs in a bearing constituting an electric motor or the like, the equipment is greatly damaged, and the equipment operation rate may be significantly reduced. Therefore, it is preferable to periodically perform the above diagnosis on the bearing.
In the above diagnosis, for example, vibration generated in a device is converted into an acoustic electric signal using a vibration pickup, a sound collecting microphone, etc., and then A / D converted and taken into a computer, and the signal waveform is obtained. It is done by analyzing.

FIG. 6 shows a configuration example of the diagnostic apparatus. That is, the vibration pickup 3 is attached to the bearing 2 (built in the housing) of the electric motor 1, and the output signal from the vibration pickup 3 is a drive amplifier (a charge amplifier or a sensor amplifier depending on the type of the vibration pickup 3). 4 is amplified and analyzed by the FFT analyzer 5. The analysis processing result is given to the personal computer 6. For example, Non-Patent Document 1 discloses the configuration of the drive amplifier 4 used in the above device.
Toyo Technica 2003 General Catalog Accelerometer AC Power Supply Signal Conditioner Model: PCB-3581-00-0301000-269-4.0-T7G-CA

  However, the apparatus configuration described above is very poor in portability, and it has been extremely troublesome to install these in the vicinity of the electric motor 1 and perform vibration measurement. In particular, in an environment where a plurality of electric motors 1 are arranged close to each other, it is difficult to make a diagnosis for each electric motor 1. Therefore, in order to make it possible to more easily perform vibration measurement, the applicant has proposed a diagnostic apparatus configured as follows in Japanese Patent Application No. 2003-73821.

That is, as shown in FIG. 7, the vibration sensor 8 for detecting the vibration of the bearing of the rotating machine can be connected to the PC card 7, and the driving power for the vibration sensor 8 is generated based on the power supplied from the PDA 9 side. Built-in boost chopper circuit. Then, the vibration signal detected by the vibration sensor 8 is converted into digital data and transferred to the PDA 9 side. The PDA 9 includes a measurement / diagnosis program for diagnosing an abnormality in the bearing 2 based on data transferred from the PC card 7 side.
According to the diagnostic apparatus configured in this way, the operator can easily measure the vibration generated in the bearing 2 of the rotating machine while carrying a very small PDA 9 as compared with the conventional configuration, and perform the diagnosis. It becomes possible.

  FIG. 8 shows the internal configuration of the PC card 7. The sensor amplifier 10 includes a boost chopper circuit 11, a constant current circuit 12, an amplifier 13, and a filter 14. The step-up chopper circuit 11 receives 5V power supplied from the PDA 9 through the connector, and generates a power source of voltage 20V by performing a step-up chopping operation. The constant current circuit 12 receives a boosted power supply of 20 V and supplies a constant current of 2 mA to the signal line 15 of the vibration sensor 5.

  The amplifier 13 amplifies the vibration signal transmitted through the signal line 15 and outputs it to the filter 14. The filter 14 is a low-pass filter (anti-alias filter) that passes only the frequency band of vibration generated in the bearing 2, and the output signal of the filter 14 is given to the A / D converter 16. The A / D converter 16 samples the amplified vibration signal at a maximum rate of 50 kHz based on the wave format, performs A / D conversion, and outputs digital data to the PC card controller 17.

  However, the diagnostic apparatus having the above configuration has the following problems. That is, the diagnostic device is basically premised on A / D conversion and processing of the signal detected by the sensor, but if the detection target is different, the sampling rate is set according to the signal characteristics of the target. Need to change. When the sampling rate is changed, the cutoff frequency of the low-pass filter 14 arranged on the input side of the A / D converter 16 must be changed accordingly.

  However, it is difficult to place a plurality of low-pass filters 14 in advance inside the PC card 7 assuming a plurality of measurement objects due to space limitations. Therefore, conventionally, each PC card 7 is prepared for each measurement object, and each time the measurement object is changed, the PC card 7 is replaced to cope with it. Therefore, it was difficult to perform a series of measurement operations smoothly.

  Further, the PDA 9 needs to have a main body as small as possible, and generally does not have a slot for directly connecting the PC card 7. Therefore, the PC card 7 is connected via the jacket 18 having a connector (not shown) for connection to both the PDA 9 side and the PC card 7 side. Therefore, there exists a problem that the whole containing the jacket 18 will become large.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a diagnostic apparatus system for a rotating machine that can perform vibration measurement more easily.

The diagnostic apparatus system for a rotating machine according to the present invention includes a detection sensor for detecting a physical quantity generated according to the rotating operation of the rotating machine and a signal processing circuit for processing a sensor signal output from the detection sensor. A function expansion card and a mobile terminal configured to be connectable to the function expansion card,
The function expansion card is an A / D conversion means for converting the sensor signal output from the detection sensor into digital data, and for transferring the data converted by the A / D conversion means to the portable terminal side. Built-in data transfer means,
A sensor signal output by the detection sensor is low-pass filtered between the detection sensor and the function expansion card, and is supplied from the mobile terminal side with a plurality of low-pass filters each having a different cutoff frequency. An intermediate unit including a power supply circuit that generates a power supply for driving the detection sensor based on a power supply is connected.

  That is, since a plurality of low-pass filters and a detection sensor power supply circuit that require a relatively large circuit area are arranged in an intermediate unit outside the function expansion card, the space problem is solved. And if the sampling rate of A / D conversion is changed according to the object to be measured, if it is used by switching to the one with the optimum cut-off frequency among the multiple low-pass filters in the intermediate unit, it will function as before There is no need to replace and use expansion cards one by one.

  According to the present invention, even when a series of measurements are performed on a plurality of diagnostic items related to a rotating machine, it is possible to cope with at least replacement of a detection sensor, so that measurement efficiency can be improved.

  An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 shows a state where vibrations of a bearing of an electric motor are measured by the diagnostic device system of the present invention. Cylindrical joining plates 25 and 26 are fixedly attached to the tip of the rotating shaft 22 of the electric motor (for example, induction motor, rotating machine) 21 and the tip of the rotating shaft 24 of the load device 23. The respective joining plates 25 and 26 are joined and fixed with bolts, whereby the electric motor 21 and the load device 23 are joined.

Roller bearings 28 for supporting the rotating shaft 22 are mounted at both ends of the motor frame 27, and these roller bearings (hereinafter simply referred to as bearings) 28 are accommodated in a housing 29 of the motor frame 27. Yes.
An acceleration sensor (detection sensor) 30 made of a piezoelectric element, which is a vibration detection means, is attached to the upper portion of the outer peripheral surface of the housing 29 that houses the bearing 28 on the rear end side (left side in FIG. 2) by the magnetic force of the magnet. ing. When the acceleration sensor 30 receives vibration due to the rotation of the rotating shaft 22 of the electric motor 21, the vibration is converted into an analog electric signal (vibration signal) by the piezoelectric element, and this vibration signal is transmitted to the PDA via the signal line 31 and the intermediate unit 32. The data is output to an input terminal of a CF card (Compact Flash card, function expansion card) 34 connected to (Personal Digital Assistants, portable terminal) 33.

  Here, FIG. 1 shows an enlarged configuration of the diagnostic apparatus system 35 including the PDA 33. The PD 33 is a small personal computer (so-called mobile computer) configured to be portable. On the upper surface of the case, a display input unit 36 configured to display with an LCD or the like and also capable of pen touch input, an operation key 37 for performing a simple operation, and the like are arranged. Further, the PDA 33 has a card slot (not shown) for connecting the CF card 34 formed on the upper end side of the main body.

  An intermediate unit 32 is inserted between the acceleration sensor 30 and the CF card 34. The intermediate unit 32 has a case formed in a cylindrical pen shape, and a hook 32a is formed so that the operator can attach the intermediate unit 32 to a pocket of clothes when the diagnostic device system 35 is used. Has been. The internal configuration of the intermediate unit 32 will be described later.

  In FIG. 3, the electrical configuration of the PDA 33 is shown in functional blocks. The PDA 33 includes a CPU 38, a memory (storage means) 39, an ISA bus interface (I / F) 40, and the like. The ISA bus I / F 40 performs bus control with the CF card 34. In the memory 39, WINDOWS CE (registered trademark) is installed as an operating system (OS) 41, and a measurement / diagnostic program (diagnostic means) 42 is stored as an application program operating on the OS 41.

The measurement / diagnosis program 42 stores the vibration data transferred from the CF card 34 in the memory 39 as a part of the diagnosis data file 43 in the RIFF WAVE format. In addition, a Windows Media Player (registered trademark) 44 is installed as an application program, and an audio signal can be reproduced and output based on the diagnostic data file 43.
The audio signal can be output from the headphone jack 46 via the D / A converter 45. That is, the operator can listen to the audio signal reproduced and output by connecting a headphone (not shown) to the headphone jack 46.

  FIG. 4A shows the electrical configuration of the intermediate unit 32 and the CF card 34 as functional blocks. The intermediate unit 32 is configured such that various detection sensors shown in FIG. Here, in addition to the acceleration sensor 30, examples of the detection sensor include a microphone 48, a current transformer (CT) 49, a temperature sensor 50, and the like. These sensors 30 and 48 to 50 are connected to the connector 47 on the intermediate unit 32 side via the respective connectors 51 to 54.

  The connector 47 has 6 pins, the first pin is ground, the second to fourth pins are sensor signal input terminals, and the fifth and sixth pins are the determination signal lines L1 and L2. One of the signal lines in each sensor is connected to the first pin of each of the connectors 51 to 54, and the other of the signal lines includes the acceleration sensor 30 and the microphone (detection sensor) 48 as the fourth pin. A (detection sensor) 49 is connected to the third pin, and a temperature sensor (detection sensor) 50 is connected to the second pin. Further, the fifth pin of the connector 52, the sixth pin of the connector 53, and the fifth and sixth pins of the connector 52 are all connected to the first pin, and when connected to the connector 47, it drops to the ground level. It is configured.

In the intermediate unit 32, the determination signal lines L1 and L2 connected to the fifth and sixth pins of the connector 47 are both pulled up to a 5V power source via a resistance element, and the connector on the CF card 34 side. 55. The 5V power is supplied from the PDA 33 via the connector 55 and the CF card 34, although not specifically shown.
The second, third, and fourth pins of the connector 47 are connected to input terminals of a high-pass filter (HPF) 56, a buffer 57, and a high-pass filter 58, respectively. Each of the high-pass filters 56 and 58 is a filter whose cutoff frequency is set to 0.05 Hz and cuts the DC component of the input signal, and the output terminals thereof are both connected to the input terminal of the buffer 57 in common. . However, the booster chopper circuit (power supply circuit) 60 is connected to the input terminal of the connector 47: the high-pass filter 58 on the fourth pin side via the constant current circuit 59. That is, when the current transformer 49 is connected, the high-pass filters 56 and 58 are not connected.

  The step-up chopper circuit 60 receives the 5V power supplied from the PDA 33 side, and performs a step-up chopping operation at a switching frequency higher than the frequency band (˜20 kHz) of vibration generated in the bearing 28 of the rotating machine 210. A 20V power supply is generated. The constant current circuit 59 receives a boosted power supply of 20 V and supplies a constant current of 2 mA to the fourth pin of the connector 47.

  An output terminal of the buffer 57 is connected to input terminals of three low-pass filters (LPF) 62 to 64 via a demultiplexer 61. The demultiplexer 61 is configured by a combination of a plurality of analog switches, and a signal output destination is selected by a switching control signal supplied from the PDA 33 side via the connector 55. Note that the cutoff frequencies of the low-pass filters 62 to 64 are about several hundred Hz to about several tens kHz, and are different from each other.

  The output terminals of the low-pass filters 62 to 64 are connected to one of the input terminal of the integrator 65 and the input terminal of the multiplexer 66. The output terminal of the integrator 65 is connected to the other input terminal of the multiplexer 66 together with the input terminal of the integrator 67 of the next stage. The output terminal of the integrator 67 is also the other input terminal of the multiplexer 66. Connected to one of the two. The integrators 65 and 67 are constituted by a low-pass filter whose cutoff frequency is set to 3 Hz, for example.

The multiplexer 66 is constituted by a combination of a plurality of analog switches, selects any input signal according to a switching control signal given from the PDA 33 side via the connector 55, and outputs it to the CF card 34 side via the connector 55. It is supposed to be. That is, the output signals of the low-pass filters 62 to 64 are directly passed through (1) the integrator 65 and (3) both of the integrators 65 and 67 without going through the integrators 65 and 67. One of these three processing systems is selected by switching the multiplexer 66.
Further, the intermediate unit 32 is provided with a measurement start / stop switch (trigger switch) 68, and the operator operates the switch 68 to measure the PDA 33 via the connector 55 and the CF card 34. It is possible to start / stop.

  On the other hand, the CF card 34 has a connector 71 connected to the connector 55 on the intermediate unit 32 side, and a signal output from the multiplexer 66 is given to the amplifier 72 via the connector 71. The gain of the amplifier 72 is switched to +6 dB and 0 dB by the gain switching unit 73, and the signal amplified by the amplifier 72 is given to, for example, a 12-bit A / D converter 74.

  An A / D converter 74, a PC card controller (data transfer means) 76, a memory 77, and the like are connected to the CPU 75 via a bus. The CPU 75 controls the A / D converter 74 and the PC card controller 76 and performs signal input / output control via the I / O port 78. The control of the gain switching unit 73 described above is also performed via the I / O port 78.

  The PC card controller 76 is a logic configured to operate by decoding a control command given from the CPU 75 by an internal decoder (not shown) and transfer data between the CF card 34 and the PDA 33. . The PC card controller 24 receives the data output from the A / D converter 74 and transfers it to the PDA 33 side.

  Next, the operation of the present embodiment will be described with reference to FIG. The detailed structure of the rolling bearing 2 and the outline of the abnormality diagnosis method are disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-255241, and the description thereof is omitted here. Further, the basic processes of the vibration data measurement and diagnosis processes are the same as those described in Japanese Patent Application Laid-Open No. 2003-149090 or Japanese Patent Application No. 2003-73821. Since the present invention is not characterized in the contents of the measurement and diagnosis processing, these are also omitted.

  FIG. 5 is a flowchart showing an outline of measurement processing by the CPU 38 on the PDA 33 side. First, the PDA 33 reads the voltage levels of the determination signal lines L1 and L2 connected to the sensor input port, that is, the connector 55 in the intermediate unit 32 (step S1). Here, when the sensors 30, 48 to 50 are connected to the connector 47 of the intermediate unit 32, the voltage levels of the determination signal lines L1 and L2 are set as follows. “H” is 5 V, and “L” is the ground level.

L2 L1
Acceleration sensor 30 H H
Microphone 48 H L
Current transformer 49 L H
Temperature sensor 50 L L
Accordingly, the PDA 33 can determine the type of sensor connected to the connector 47 of the intermediate unit 32 by reading the voltage levels of the determination signal lines L1 and L2 (step S2).

Next, the PDA 33 sets the sampling rate of the A / D converter 74 according to the determined type of sensor (step S3). For example, when the acceleration sensor 30 is connected to the connector 47 and the vibration sensor tries to pick up a vibration signal up to a component of about 10 kHz, the sampling rate of the A / D converter 74 is set to about 25 kHz.
Subsequently, the low pass filters 62 to 64 having different cutoff frequencies are selected according to the setting of the sampling rate (step S4). That is, when the sampling rate is 25 kHz, the cutoff frequency of the low-pass filter as the anti-aliasing filter is 12.5 kHz. Also, in these steps S3 and S4, when the microphone 48 is connected to the connector 47 and noise measurement around the motor 21 is performed, the sampling rate of the A / D converter 74 and the cutoff frequency of the low-pass filters 62 to 64 are also measured. The choice will be about the same.

Further, when the current transformer 49 is connected to the connector 47 and the primary side current of the motor 21 is measured, the power supply frequency is 50 to 60 Hz, and the sideband observed when the motor 21 is poorly insulated is also near these frequencies. Therefore, the sampling rate is about 1 kHz, and the cutoff frequency of the selected low-pass filter is about 500 Hz.
Subsequently, the PDA 33 selects the integration process of the sensor signal (step S5). That is, as described above, the output signals of the low-pass filters 62 to 64 are (1) “output as is”, (2) “output only through the integrator 65”, and (3) “both the integrators 65 and 67”. Is selected by switching the input of the multiplexer 66. The selection of these integration processes is performed only when the acceleration sensor 30 is connected. For other sensor signals, (1) “Output as is” is selected.

  That is, since the acceleration sensor 30 outputs a vibration acceleration signal, an acceleration signal can be obtained by selecting “output as it is” in (1), and “output only through the integrator 65” in (2). If is selected, a speed signal is obtained. Further, if the “output through both integrators 65 and 67” in (3) is selected, the variation of the speed signal can be obtained.

  Next, the PDA 33 waits until the measurement start / stop switch 68 is turned on on the intermediate unit 32 side (step S6). When the measurement is turned on (“YES”), the A / D converter 74 performs the A / D conversion. Data converted and transferred from the CF card 34 side is read (step S7). Data reading is continued until the measurement start / stop switch 68 is turned on again (step S8). When the measurement start / stop switch 68 is turned on ("YES"), the measurement is terminated.

  As described above, according to this embodiment, the A / D converter 74 that converts the sensor signals output from the detection sensors 30 and 48 to 50 into digital data inside the CF card 34, and the A / D conversion. A PC card controller 76 for transferring the data converted by the device 74 to the PDA 33 side, and a plurality of low-pass filters 62 having different cutoff frequencies between the detection sensors 30, 48 to 50 and the CF card 34. ˜64 and the intermediate unit 32 including the boosting chopper circuit 60 that generates the driving power for the detection sensors 30 and 48 based on the power supplied from the PDA 33 side is connected, thereby diagnosing the system 35 of the rotating machine Configured.

  That is, by appropriately selecting the detection sensors 30, 48 to 50 connected to the intermediate unit 32, even when a series of measurements are performed on a plurality of diagnostic items related to the electric motor 21, a configuration necessary for these measurements can be configured with a plurality of CF cards. There is no need to assign to 34. Then, according to changing the sampling rate of A / D conversion according to the object to be measured, the low-pass filters 62 to 64 in the intermediate unit 32 may be used by switching to the one having the optimum cutoff frequency. It is not necessary to replace the cards 34 one by one. Therefore, according to the diagnostic system 35 of the present invention, it is possible to cope with various types of measurement only by replacing at least the detection sensors 30 and 48 to 50, thereby improving work efficiency.

Further, the detection sensors 30, 48 to 50 and the intermediate unit 32 are connected via connectors 51 to 54 and 47, and the connector 47 is connected to the detection sensors 30, 48 to 50 via connectors 51 to 54. In such a case, a voltage signal (electrical signal) for determining the type of the connected detection sensor is output to the CF card 34 side.
More specifically, the number of determination signal lines L1 and L2 corresponding to the number of digits when the number of types of detection sensors assumed to be used is expressed in binary is prepared for the connectors 47 and 51 to 54 (this In the embodiment, the number of sensor types “4” is two), and the determination signal lines L1 and L2 are pulled up on the intermediate unit 32 side. When any of the connectors 51 to 54 is connected to the connector 47, a voltage signal is output according to the potential state change whether or not the level of the signal lines L1 and L2 is dropped to the ground. Therefore, even if the operator does not set the sensor type or the like, the PDA 33 can automatically determine these.

  Further, the connectors 47 and 51 to 54 are configured so that the signal input terminals differ depending on the type of the detection sensor to be connected, and on the intermediate processing unit 32 side, each signal input terminal includes a signal of the corresponding detection sensor. The high-pass filters 58 and 60 according to the characteristics can be connected, or the filter can be selected not to be connected. Accordingly, the filter selection can be automatically performed according to the type of the detection sensors 30 and 48 to 50 to be connected.

As for the acceleration sensor 30 and the microphone 48, the types of signals to be handled are vibration and noise, which are basically the same, and the frequency bands are substantially the same. Considered the same type.
In addition, the intermediate unit 32 is provided with a measurement start / stop switch 68 that outputs a trigger signal indicating the start / stop timing of detection by the detection sensors 30, 48 to 50 to the PDA 33 side, so that the operator operates the switch 68. By doing so, the timing of measurement start / stop can be controlled.

  In addition, since the power supply circuit built in the intermediate unit 32 is configured as the boost chopper circuit 60 for driving the acceleration sensor 30, it is possible to drive the acceleration sensor 30 that requires a relatively high-voltage drive power supply. Become. Furthermore, a hook 32 is formed on the case of the intermediate unit 32. Therefore, when the operator uses the diagnostic device system 35, the intermediate unit 32 can be mounted in a pocket of clothes, and the convenience is improved.

The present invention is not limited to the embodiments described above and shown in the drawings, and can be modified or expanded as follows.
Five or more types of detection sensors may be connected to the intermediate unit.
A configuration in which the PDA 33 automatically determines the type of the detection sensor by the connectors 47 and 51 to 54 may be provided as necessary. For example, the intermediate unit 32 may be provided with a switch for instructing the PDA 33 to set the sampling rate in the A / D converter 74 so that the operator operates the switch to perform the switching. good.

Even in the configuration in which the PDA 33 automatically determines the type of detection sensor, if it is desirable to adjust the sampling rate in accordance with the detection target, the above switches may be provided simultaneously.
For example, the wireless communication may be performed between the intermediate unit 32 and the CF card 34 by Bluetooth (registered trademark).

The function expansion card is not limited to the CF card, but may be a PCMCIA card.
The measurement start / stop switch 68 may be provided as necessary, and the measurement start / stop timing may be set on the PDA 33 side.
The power supply circuit built in the intermediate unit is not limited to the step-up chopper circuit 60 and may be any power supply circuit as long as it is necessary to generate a power supply among detection sensors that can be used.

The figure which is one Example of this invention, and shows the structure of a diagnostic apparatus system The figure which shows the state which performs the vibration measurement of the bearing of an electric motor with a diagnostic device system Functional block diagram showing electrical configuration of PDA (A) is a functional block diagram showing the electrical configuration of the intermediate unit and the CF card, (b) is a diagram showing various detection sensors connected to the intermediate unit Flow chart showing an outline of measurement processing by the CPU on the PDA side FIG. 2 equivalent diagram showing the prior art 1 equivalent diagram Functional block diagram showing the internal configuration of the PC card

Explanation of symbols

In the drawing, 21 is an induction motor (rotary machine), 28 is a bearing, 30 is an acceleration sensor (detection sensor), 32 is an intermediate unit, 33 is a PDA (portable terminal), 34 is a CF card (function expansion card), 35 Is a diagnostic device system, 32a is a hook for mounting, 47 is a connector, 48 is a microphone (detection sensor), 49 is a current transformer (detection sensor), 50 is a temperature sensor (detection sensor), 51 to 54 are connectors, 56 and 58 Is a high-pass filter, 60 is a step-up chopper circuit (power supply circuit), 62 to 64 are low-pass filters, 68 is a measurement start / stop switch (trigger switch), 74 is an A / D converter, and 76 is a PC card controller (data transfer means) ).

Claims (8)

Function expansion card incorporating a detection sensor for detecting a physical quantity generated according to the rotation operation of the rotating machine, a signal processing circuit for processing a sensor signal output from the detection sensor, and the function expansion A diagnostic device system for a rotating machine using a portable terminal configured to be connectable with a card,
The function expansion card is an A / D conversion means for converting the sensor signal output from the detection sensor into digital data, and for transferring the data converted by the A / D conversion means to the portable terminal side. Built-in data transfer means,
A sensor signal output by the detection sensor is low-pass filtered between the detection sensor and the function expansion card, and is supplied from the mobile terminal side with a plurality of low-pass filters each having a different cutoff frequency. A rotating machine diagnosis device system, wherein an intermediate unit including a power supply circuit that generates a power supply for driving the detection sensor based on a power supply is connected. The detection sensor and the intermediate unit are configured to be connectable via a connector,
The connector is configured such that when the detection sensor is connected, an electrical signal for determining the type of the detection sensor can be output to the function expansion card side. The diagnostic device system for a rotating machine according to claim 1. The connector is connected to a signal line for determination corresponding to the number of digits when the number of types of detection sensors assumed to be used is expressed in binary.
Their signal lines for discrimination are pulled up,
3. The rotating machine according to claim 2, wherein the electrical signal is output in accordance with each potential state of the determination signal line when each detection sensor is connected to the connector. Diagnostic equipment system. The detection sensor and the intermediate unit are configured to be connectable via a connector,
The connector is configured such that the signal input terminal differs according to the type of detection sensor to be connected,
4. Each of the signal input terminals is configured such that a filter corresponding to the signal characteristic of the corresponding detection sensor is connected, or whether or not the connection is selected is selected. A diagnostic device system for a rotating machine according to any one of the above.   5. The intermediate unit is provided with a trigger switch for outputting a trigger signal indicating a physical quantity detection start / stop timing by the detection sensor to the mobile terminal side. A rotating machine diagnostic apparatus system according to any one of the above.   6. The switch according to claim 1, wherein the intermediate unit is provided with a switch for instructing switching of a sampling rate in an A / D conversion means arranged on the function expansion card side. A diagnostic apparatus system for a rotating machine according to claim 1. When the detection sensor is an acceleration sensor,
7. The diagnostic system for a rotating machine according to claim 1, wherein the power supply circuit built in the intermediate unit is configured as a booster circuit for driving the acceleration sensor. 8. The diagnostic apparatus system for a rotating machine according to claim 1, wherein a hook for attachment to an operator's clothes is formed outside the intermediate unit.

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