JP2006337199A - Signal recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To confirm a measuring state in real time, while measuring surely a moving body moving at high speed. <P>SOLUTION: In the first mode, a CPU 14 supplies all measured data inputted through an A/D converter 11 and CPLD 12 to a Bluetooth radio communication module 15. The Bluetooth radio communication module 15 transmits all the measured data to a communication terminal device 30 in real time. In the second mode, the Bluetooth radio communication module 15 transmits intermittent data acquired by thinning out the measured data to a host computer 40 through the communication terminal device 30. The CPLD 12 writes all the measured data inputted from the A/D converter 11 in a memory 13. After finish of measurement, the data in the memory 13 are read out and transmitted to the host computer 40. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a signal recording apparatus, and more particularly to a signal recording apparatus that records a signal related to a moving body in a state of being attached to the moving body that repeats a cycle that moves at high speed on a predetermined locus.

  There has been disclosed a small data collection device for measuring and collecting an analog amount without receiving external power supply and performing various data analysis using a computer (see, for example, Patent Document 1).

  A small-sized data collection device described in Patent Document 1 has an analog / digital conversion function, a function of recording data in a data recording unit, and a function of outputting data recorded in the data recording unit to an external personal computer. A data collection device body including a computer and a battery that supplies power to the microcomputer and the data recording unit is provided, and a plurality of analog sensors are connected to the data collection device body.

  The small-sized data collection device having such a configuration is formed in a small size so that it can be installed in a limited narrow space without requiring power supply from others. A plurality of different analog quantities can be measured and collected, and a plurality of different analog quantities can be analyzed in various ways using a general-purpose personal computer.

In addition, a telemeter system, a wireless data transmitter, a wireless LAN, and the like have been conventionally used as devices for transmitting measurement data wirelessly.
JP-A-8-159817

  Since a data collection device that does not have a real-time transmission function as described in Patent Document 1 is attached to a measurement object independently, measurement data cannot be transmitted to the outside during the movement of the measurement object. For this reason, there is a problem that it is not possible to know the state of the measurement object and whether the measurement is being performed correctly.

  In addition, an analog telemeter that transmits measurement data wirelessly generates noise depending on the radio wave condition and is difficult to measure in a good condition.

  In addition, the digital data transmission apparatus not only has the above-described noise problem, but also reduces the data transfer rate when it is attempted to reduce the size. For this reason, there has been a problem that it cannot cope with high-frequency measurement signals that require high-speed sampling. Further, when trying to increase the data transfer speed, there is a problem that a complicated circuit is required and the data transmission apparatus becomes large and cannot be attached to a high-speed motion measuring object.

  The present invention has been proposed in order to solve the above-described problems, and an object thereof is to provide a signal recording apparatus capable of confirming a measurement state in real time while reliably measuring a moving body that moves at high speed. To do.

  A signal recording apparatus according to the present invention is a signal recording apparatus that is attached to a moving body that repeats a cycle that moves on a predetermined trajectory, and that records a signal according to the state of the moving body while moving integrally with the moving body. A signal input means for inputting a signal corresponding to the state of the moving body; a storage means for storing the signal input to the signal input means; and a signal input to the signal input means by radio or infrared. Communication means for communicating.

  Therefore, the signal recording device moves integrally with the moving body, stores a signal corresponding to the state of the moving body in the storage means, and communicates the signal to thereby generate a signal corresponding to the state of the moving body. In addition to being able to record reliably, the signal can be monitored in real time at the communication destination.

  In the above invention, the communication means may communicate all the signals input to the signal input means, or may communicate a signal thinned out from the input signals.

  Further, the communication means communicates all the signals input to the signal input means when the transfer rate exceeds the sampling rate of the signal input to the signal input means, and the transfer rate is equal to or lower than the sampling rate. At this time, a signal thinned out from the input signal may be communicated. This makes it possible to monitor at least the status of the input signal regardless of the sampling rate of the input signal.

  The signal recording apparatus is configured to supply power obtained by the second electromagnetic coupling unit paired with the first electromagnetic coupling unit provided at a communication destination of the communication unit, and the power obtained by the second electromagnetic coupling unit. And an accumulating means for accumulating as the above. Thereby, the signal recording apparatus can operate the circuit using the power supplied from the outside.

  The signal recording apparatus according to the present invention stores a signal according to the state of the moving body in the storage means, and reliably records the signal according to the state of the moving body by communicating the signal wirelessly or by infrared. In addition, the signal can be monitored in real time at the communication destination.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a configuration diagram of a moving body measurement system according to the first embodiment of the present invention. The moving body measurement system measures the moving body 5 that repeats a cycle of moving at high speed on a predetermined trajectory. The moving body measurement system includes a data recording device 10 attached to the moving body 5, a communication terminal device 30 that performs wireless communication with the data recording device 10, and a host computer 40 that receives data from the communication terminal device 30. And.

  In FIG. 1, the moving body 5 is a belt member hung between two pulleys with a constant tension, but the present invention is not limited to this. That is, the moving body 5 only needs to repeat a cycle that moves on a predetermined locus.

  FIG. 2 is a block diagram showing a detailed configuration of the data recording apparatus 10. The data recording device 10 moves together with the moving body and records a measurement signal corresponding to the state of the moving body. The measurement signal corresponding to the state of the moving body is, for example, a signal representing the temperature of the moving body, the speed of the moving body, and the like.

  The data recording device 10 includes an A / D converter 11 that converts a measurement signal of a moving body that is an analog signal into measurement data of a digital signal, a CPLD (Complex Programmable Logic Device) 12 that controls writing and reading of the measurement data, A memory 13 that stores measurement data, a CPU (Central Processing Unit) 14 that performs overall control, a Bluetooth wireless communication module 15 that performs Bluetooth wireless communication, and a wireless antenna 16 are provided.

  The data recording apparatus 10 further includes an electromagnetic coupling coil 21, an electromagnetic induction circuit 22 that performs electromagnetic induction, and a power source / charging circuit 23 that charges a rechargeable battery 24, which will be described later, using power obtained by the electromagnetic induction circuit 22 as a power source. And a rechargeable battery 24 that stores power to be supplied to each circuit.

  The communication terminal device 30 supplies power to the data recording device 10 and receives data from the data recording device 10. The communication terminal device 30 includes a wireless antenna 31 for receiving radio waves from the data recording device 10 and an electromagnetic coupling coil 32 for performing electromagnetic coupling with the electromagnetic coupling coil 21. A current is supplied from the communication terminal device 30 to the electromagnetic coupling coil 32, and a magnetic field is generated from the electromagnetic coupling coil 32. The communication terminal device 30 is connected to the host computer 40 via a USB cable.

  At the time of measurement of the moving body 5, the data recording device 10 rotates with the moving body 5 and moves so as to follow the same locus. Each time the data recording device 10 passes near the communication terminal device 30, the electromagnetic coupling coil 21 and the electromagnetic coupling coil 32 perform electromagnetic coupling. The electromagnetic induction circuit 22 generates electric power by electromagnetic coupling, and accumulates the electric power in the rechargeable battery 24 via the power source / charging circuit 23. The power supply / charge circuit 23 supplies the power stored in the rechargeable battery 24 to the CPU 14 and other circuits as a power supply voltage.

  On the other hand, the CPLD 12 writes the measurement data of the moving body 5 supplied via the A / D converter 11 to the memory 13 and supplies it to the CPU 14. The CPU 14 supplies the measurement data to the Bluetooth wireless communication module 15 and instructs the Bluetooth wireless communication module 15 to wirelessly communicate the measurement data. The Bluetooth wireless communication module 15 wirelessly communicates measurement data to the communication terminal device 30 via the wireless antenna 16.

  The data recording device 10 configured as described above operates in one of the following two modes depending on the state of the moving body 5 that is the measurement object.

  FIG. 3 is a diagram showing the relationship between the operation mode of the data recording apparatus 10 and the transfer rate. When the Bluetooth data transfer rate is 100 kbps (low-speed transfer mode with low power consumption), if 1 data is 64 bits (2 bytes 4 channels), the transmittable data is about 1500 data / sec. Modes are divided on the basis of this transfer rate.

(First mode: Digital tele mode)
The first mode is an optimal mode when measuring a relatively slow phenomenon such as temperature measurement. When the sampling rate is equal to or less than the transfer rate 1500 data / sec, the CPU 14 of the data recording apparatus 10 supplies all the measurement data input via the A / D converter 11 and the CPLD 12 to the Bluetooth wireless communication module 15. The Bluetooth wireless communication module 15 transmits all measurement data to the communication terminal device 30 in real time. Thereby, the host computer 40 can receive the measurement data of the moving body 5 in real time via the communication terminal device 30. When the host computer 40 receives all measurement data, the measurement is completed.

(Second mode: Real-time monitor mode)
The second mode is an optimal mode when a sampling rate exceeding 1500 data / sec is required to measure a phenomenon that changes at high speed.

  When the sampling rate exceeds 1500 data / sec, the Bluetooth wireless communication module 15 cannot transmit all measurement data in real time. Therefore, the CPU 14 thins out the measurement data input via the A / D converter 11 and the CPLD 12 and supplies this data (intermittent data) to the Bluetooth wireless communication module 15. At this time, the CPU 14 may perform calculation so that the time intervals of the intermittent data are equal based on the sampling rate and the transfer rate of the Bluetooth wireless communication module 15. The Bluetooth wireless communication module 15 transmits intermittent data to the host computer 40 via the communication terminal device 30. Note that the CPU 14 may supply all of the measurement data to the Bluetooth wireless communication module 15, and the Bluetooth wireless communication module 15 may perform wireless communication by thinning out the measurement data.

  While the measurement data is wirelessly transmitted to the communication terminal device 30, the CPLD 12 writes all measurement data input from the A / D converter 11 in the memory 13.

  Thereby, the host computer 40 can monitor the state of the measurement data in real time, and all necessary data is stored in the memory 13 of the data recording device 10. All the measurement data is stored in the memory 13, and when the measurement is completed, the measurement data stored in the memory 13 is transmitted to the communication terminal device 30 via the CPLD 12, the CPU 14, and the wireless antenna 16. Therefore, the host computer 40 can acquire all the measurement data of the moving body 5 after the measurement is completed.

  As described above, the data recording device 10 includes the memory 13 that stores the measurement data of the moving body 5 that moves along a certain locus, and the Bluetooth that transmits the measurement data to the communication terminal device 30 and the host computer 40 by wireless communication. A wireless communication module 15 is provided. As a result, the host computer 40 can confirm the phenomenon of the moving body 5 in real time, and the data recording apparatus 10 that is reduced in size and weight can acquire all of the measurement data of the moving body 5.

  In particular, in the first mode, the host computer 40 can acquire all measurement data of the moving body 5 in real time. In the second mode, the host computer 40 confirms the intermittent phenomenon of the moving body 5 in real time, and the data recording device 10 can acquire all measurement data of the moving body 5. In the first and second modes, since the communication between the data recording device 10 and the host computer 40 is established even during measurement, the settings of the data recording device 10 can be changed during measurement. is there.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The moving body measurement system according to the second embodiment operates the data recording device 10 alone when the communication terminal device 30 cannot be installed near the moving body 5.

  The data recording device 10 has a configuration in which the electromagnetic coupling coil 21, the electromagnetic induction circuit 22, the power source / charging circuit 23, and the rechargeable battery 24 are excluded from the circuit shown in FIG. As a result, the data recording apparatus 10 can be reduced in size and weight as compared with the first embodiment.

  In the present embodiment, the data recording device 10 cannot perform wireless communication with the communication terminal device 30 and is not supplied with power from the communication terminal device 30 during measurement. Therefore, the CPU 14 of the data recording device 10 stops the Bluetooth wireless communication module 15 to suppress power consumption.

  During measurement of the moving body 5, all measurement data is stored in the memory 13. After the measurement, the user may remove the data recording device 10 from the moving body 5 and bring the data recording device 10 closer to the communication terminal device 30. At this time, the measurement data stored in the memory 13 of the data recording device 10 is transmitted to the communication terminal device 30 via the CPLD 12, the CPU 14, and the wireless antenna 16. Therefore, the host computer 40 can acquire all the measurement data of the moving body 5 after the measurement is completed.

  As described above, the data recording apparatus 10 according to the second embodiment is reduced in size and weight so as to minimize the influence on the movement of the moving body 5. For this reason, the data recording device 10 can be attached to various moving bodies 5.

[Third Embodiment]
FIG. 4 is a block diagram showing a detailed configuration of the data recording apparatus 10 according to the third embodiment.

  The data recording apparatus 10 is provided with a Bluetooth built-in CPU 17 in which these are integrated instead of the CPLD 12, the CPU 14, and the Bluetooth wireless communication module 15 shown in FIG. The Bluetooth built-in CPU 17 includes a Bluetooth communication circuit 17 a for performing wireless communication via the wireless antenna 16. Since the data recording device 10 can execute main functions with one IC chip (CPU 17 with built-in Bluetooth), it is smaller and lighter than the data recording device 10 of the first embodiment. ing.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can also be applied to a design modified within the scope of the claims. For example, in the first to third embodiments, the case where there is one input channel for measurement data has been described as an example, but there may be two or more input channels. In the first embodiment, when the moving body 5 reciprocates, the installation location of the communication terminal device 30 may be set as follows.

  FIG. 5 is a diagram illustrating an installation location of the communication terminal device 30 when the moving body 5 reciprocates. As shown in the figure, when the data recording device 10 reaches the end point of the reciprocating motion together with the moving body 5, the electromagnetic coupling coil 21 of the data recording device 10 and the electromagnetic coupling coil 32 of the communication terminal device 30 are close to each other. A communication terminal device 30 is arranged.

  Thereby, when the data recording device 10 reaches the end point of the reciprocating motion together with the moving body 5, the time for the electromagnetic coupling coil 21 of the data recording device 10 and the electromagnetic coupling coil 32 of the communication terminal device 30 to approach each other becomes longer. The amount of power supply from the terminal device 30 to the data recording device 10 can be increased.

  In the first to third embodiments, the data recording device may be provided with an infrared communication module for performing infrared communication with the communication terminal device 30 instead of the Bluetooth wireless communication module 15.

1 is a configuration diagram of a moving body measurement system according to a first embodiment of the present invention. It is a block diagram which shows the detailed structure of a data recording device. It is a figure which shows the relationship between the operation mode of a data recording device, and a transfer rate. It is a block diagram which shows the detailed structure of the data recording device which concerns on 3rd Embodiment. It is a figure which shows the installation place of a communication terminal device in case a moving body reciprocates.

Explanation of symbols

10 Data Recording Device 11 A / D Converter 12 CPLD
13 Memory 14 CPU
15 Bluetooth wireless communication module 16 Wireless antenna 21 Electromagnetic coupling coil 22 Electromagnetic induction circuit 23 Power supply / charging circuit 24 Rechargeable battery 30 Communication terminal device 40 Host computer

Claims (4)

A signal recording device that is attached to a moving body that repeats a cycle that moves on a predetermined locus, and that records a signal according to the state of the moving body while moving integrally with the moving body,
Signal input means for inputting a signal according to the state of the moving body;
Storage means for storing a signal input to the signal input means;
A communication means for communicating a signal input to the signal input means by radio or infrared;
A signal recording apparatus comprising: The signal recording apparatus according to claim 1, wherein the communication unit communicates all the signals input to the signal input unit, or communicates a signal thinned out from the input signal. The communication means communicates all of the signals input to the signal input means when the transfer rate exceeds the sampling rate of the signal input to the signal input means, and the transfer rate is equal to or lower than the sampling rate. The signal recording apparatus according to claim 2, wherein a signal thinned out from the input signal is sometimes communicated. Second electromagnetic coupling means paired with first electromagnetic coupling means provided at a communication destination of the communication means;
Storage means for storing the power obtained by the second electromagnetic coupling means as a power source;
The signal recording apparatus according to claim 1, further comprising:

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