JP2009142577A - Heartbeat telemeter system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact heartbeat telemeter system for collecting and displaying heartbeat data of a plurality of subjects in real-time. <P>SOLUTION: The heartbeat telemeter system includes: a slave set (1) for mediating the timing of a signal synchronized with a heartbeat signal and that of the poling signal of a master set, and transmitting the heartbeat data; the master set (2) for controlling a radio line, and receiving the data of the slave set; and a processor part (4) for storing and displaying the received data. Specifically, the heartbeat telemeter system sequentially transmits data by the control of the master set through the use of the same line frequency among a biological information detecting means (1) for detecting periodically generated biological information, a transmitting means (2) for transmitting by radio wave the biological information detected by the biological information detecting means, a means (3) for receiving the biological information transmitted by the transmitting means, a means (4) for receiving the reception data and processing the data, and a plurality of transmission devices use the same frequency of the line to successively perform the transmission of the data by the control of the master set. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heart rate telemeter system that detects a heart rate signal emitted from a human body and simultaneously performs transmission display for a plurality of people.

  When exercising or in daily living activities, the number of heart beats per minute is detected and displayed as a heart rate, and if it increases too much, serious health problems may occur. Various devices have been developed for self-management, such as jogging if a detection device is incorporated in the belt worn on the chest and the data is sent to the wristwatch for display. The heart rate can be displayed while performing a light exercise (see Patent Document 1).

  However, if a wristwatch is equipped with a detection display device, it is confirmed by visual inspection only when the person wearing the watch wants to see it. When grasping the data, the data was acquired by incidental actions such as taking a record each time. In addition, for the purpose of sports training and health management, it is necessary to perform the same work for a plurality of people, which requires a lot of time and troublesome work.

On the other hand, heart rate data and various information from a living body are transmitted wirelessly and data from multiple subjects are collected in one place for centralized monitoring. Traditionally, electrocardiogram telemeters and the like are used for electrocardiograms. The waveform was transmitted in the form of an analog waveform, data for multiple people was displayed, and the heart rate was detected from the data and displayed.
Recently, an apparatus for performing digital processing and transmitting and displaying this data to a personal computer is used (see Patent Document 2).

When transmitting heart rate data wirelessly, a device is used that measures the heart rate cycle and performs data processing while monitoring the heart rate signal to prevent noise associated with communication control from suppressing the heart rate signal and making measurement difficult. (See Patent Document 3).
International Publication Number W096 / 29005 Japanese National Patent Publication No. 9-503938 JP 2005-318968 A

As described above, in order to detect and transmit heart rate data and other biological information from the human body, a small transmitter having a detection function and a reception display device that receives the same have been used. Was complicated and expensive.
In addition, when a detection electrode is provided on the belt attached to the chest and the detected data is sent to a wristwatch-type receiving device and displayed once, there is a sense of resistance for use by women, and the measurement results are displayed on a wristwatch-type display. Since it was displayed only on the device, it was not possible to know the data from the outside.

  Further, in the case of a device that transmits the electrocardiogram data and biometric information detected from the child device to the parent device and obtains heart rate data of a plurality of persons, the device of Patent Document 2 sets the ch (channel) number at the frequency of the wireless line. In order to use a plurality of slave units separately, when handling many slave units, there is a problem that the master unit is proportionally enlarged.

Furthermore, since a device for transmitting data by dividing time without dividing channels (channels) by frequency is not incorporated, it is not possible to reduce the size of the device by sharing a receiver as time division in one channel. It is possible.
When one channel is used in time-sharing, the heartbeat timing detected by each slave unit and the wireless transmission / reception operations are synchronized at the same time, that is, the possibility of collision is inevitable and time-sharing Therefore, it is extremely difficult to transmit and receive heart rate data by a system in which the line frequency of the wireless part is automatically set by phased lock loop (PLL) or crystal switching.

  In order to solve the above-mentioned problem, the invention of claim 1 is capable of receiving data from a plurality of slave units by a polling operation using a single radio link from the base unit or a radio line having only upstream and downstream frequencies separated. It is said.

  According to a second aspect of the present invention, in the first aspect of the present invention, a synchronization component is generated from a heartbeat signal detected in order to enable data reception from a plurality of slave units by a polling operation, and a timing with a polling operation is generated by a timing generation circuit Mediation is in progress.

  According to a third aspect of the present invention, in the first aspect of the present invention, a basic timing for performing a polling operation is generated, and this is transmitted to each slave unit to designate a transmission time and transmitted at a designated time. The data transmitted from the machine is received and the received data is transferred to the processor.

  The invention of claim 4 analyzes the data obtained in the invention of claim 3 and displays the data in a form that matches the intended use. When the user inputs a marking instruction during the display, the data is also displayed. Add a mark to the effect and save it in memory.

  According to a fifth aspect of the present invention, in the second aspect of the invention, the detected heartbeat signal is extracted from the level and the elapsed time of the level to determine the waveform, and from the time when the waveform is determined to the next determination By measuring the time between them and using this as cycle data, using this data to reproduce the heartbeat cycle and using it as a gate signal, about +/- 20% of the time when the heartbeat signal is expected to be generated It is possible to pass an analog signal only during the interval, and as a result, the signal can be obtained by limiting to only the heartbeat signal, so that the influence of noise is prevented and the circuit power supply is cut off while the gate is closed. It is possible to perform processing involving generation of large noise such as power generation or control of a radio circuit.

  An embodiment of the present invention will be described with reference to the drawings. In the heart rate telemeter system of the present embodiment, a plurality of slave units (2) are controlled by one master unit (3), data from the slave units is collected, analyzed by the processor unit (4), and displayed. .

  The handset (2) is caused by myoelectricity or noise by a filter that selectively passes a frequency component in the vicinity of the highest level called the R wave of the heartbeat signal after the detection signal amplifier. A heartbeat signal from which the influence of level fluctuation is removed is generated.

The heartbeat signal that has passed through the filter is passed or blocked by a control method described later through a gate circuit. The gate circuit is opened and closed by a gate signal obtained from the heartbeat cycle reproduction circuit (24c), and blocks other than necessary signal components. The heartbeat signal selectively passed in this way measures the level per time from the waveform of the R wave by the R wave synchronization circuit and determines whether or not it is an R wave. Start counting. FIG. 5 shows a configuration for realizing this operation. The heartbeat signal passing through the signal gate (24a) is measured by the heartbeat waveform measuring unit (24b) to determine whether or not the heartbeat signal is matched. 24d) is started and the measurement result is output, and the signal gate (24a) is opened and closed by reproducing the time width of the feeding period to the heartbeat period reproduction unit. At this time, it is possible to supplement even if there is fluctuation in the heartbeat by opening the gate with a width of plus or minus 20% in advance.

  Switch signal detection (25a), acceleration signal detection (25b), and temperature sensor detection (25c) are detected separately from the synchronization of the heartbeat signal and converted into data for transmission. The slave unit (2) is not limited to these signals, and may detect a biological signal and various information around it, convert it to data, and transmit it to the master unit.

  Various signals such as cycle data and switch signals obtained by the heartbeat period measuring unit are transmitted from the timing circuit and stored in the FIFO memory, and the obtained timing signal is similarly stored in the timing circuit (27). It is determined whether or not to transmit the FIFO data by adjusting the timing with the parent device polling signal obtained from the transmission / reception circuit.

  At the timing of the R wave and polling shown in FIG. 6, while the synchronization of the R wave is established and the period is measured, the timing control unit measures the call time from the parent device by using a counter and measures the time. Search reception starts when is near. At this time, if the generation of the R wave is predicted, the search is interrupted, and the search is started again when the processing of the R wave is completed. When a call from the parent device is detected by the search, the child device immediately starts response processing. Even if an R wave is generated at this time, the R wave processing is interrupted and the wireless processing is continued. FIG. 7 shows a situation where the priority of processing changes in accordance with the situation at that time.

  In the configuration shown in FIG. 1, data from the slave unit is sequentially transmitted to the master unit such as call 1 and response 1, and is transmitted according to the radio wave transmission conditions and various conditions on the slave unit side in this sequential call. There are times when there is no time, and this is as shown in FIG.

  The control timing shown in FIG. 2 is generated in the timing circuit of the master unit (3), and the data obtained each time is demodulated by the data demodulating circuit and transmitted to a processor such as a personal computer for display and storage. While the data from the machine is displayed on the screen, or while observing the situation of the subject equipped with the child machine, the measurement points are combined with the accumulated data and sequentially stored as parallel memos, for example in sports measurements It is possible to clearly record the moment when the start is started or the moment when there is an accident with data.

  When the heartbeat data is acquired in the slave unit (2), the detection electrode (1) is generally connected to the points V1 to V6 of the chest lead that are often used for medical purposes. The shape, that is, the heartbeat signal, can be detected as a plus or minus pulse component in the whole body with the peak around the heart, that is, near V2.

  On the other hand, the detection electrode (1) is often used by sticking to the chest with an adhesive tape or the like, and in order to prevent it from becoming troublesome when measuring frequently, the side of the back as a collar type shown in FIG. It is possible to perform measurement simultaneously by a plurality of subjects regardless of gender by performing measurement with one touch on the neck.

The figure which shows the systematic diagram of the whole apparatus of this invention, and the relationship of operation | movement. The timing diagram of the same call response relation. FIG. FIG. The figure which shows the operation | movement relationship of a child machine R wave synchronous circuit. The figure which shows the relationship between the R wave and radio | wireless timing in the same subunit | mobile_unit. The figure showing the processing priority in the same child machine. The figure which shows a mode that the electrode of the same child machine is connected. The figure in the case of uniting the electrodes of the child machine and placing them around the neck.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Detection part 2 Child machine 21 Biological signal amplification part 22 Frequency filter 23 A / D conversion circuit 24 R wave synchronous circuit 24a Signal gate 24b Heartbeat waveform measurement part 24c Heartbeat period reproduction | regeneration part 24d Heartbeat period measurement part 25a Switch signal detection 25b Acceleration signal Detection 25c Temperature sensor detection 26 FIFO
27 Timing circuit 28 Radio transmission / reception circuit 28a Slave unit antenna 29 Battery control circuit 3 Base unit 31 Master unit antenna 32 Base unit radio transmission / reception circuit 33 Data demodulation circuit 34 Data transfer circuit 35 Timing circuit 4 Processor unit 41 Processor 42 Display unit 43 Data storage Part 44 Marking operation part

Claims (5)

  Biological information detection means (1) for detecting biological information generated periodically, transmission means (2) for wirelessly transmitting and transmitting biological information detected by the biological information detection means, and the biological information transmitted by the transmission means Means (3) for receiving the received data, means (4) for receiving the received data and processing the data, and a plurality of transmitting devices can sequentially transmit data under the control of the master unit using the same line frequency. Heart rate telemeter system.   In the biological information detection means (1) and transmission means (2), an amplification circuit (21) for amplifying a signal from the biological information detection means (1), and only a necessary frequency component from the amplified signal is obtained. A frequency filter to be extracted (22), an A / D conversion circuit (23) for converting a signal extracted by the frequency filter from an analog value to a digital value, and an electrocardiographic waveform from the A / D converted signal. An R-wave synchronization circuit (24) for detecting the R-wave portion therein and synchronizing the period thereof, a FIFO-type memory (26) for sequentially sending out the data obtained by the R-wave synchronization circuit, and the FIFO-type A wireless transmission / reception circuit (28) for transmitting data in the memory through a wireless line, wherein the wireless transmission / reception circuit refers to a timing obtained by the R-wave synchronization circuit and controls a wireless unit; Heart telemetry system according to claim 1, characterized in that it comprises a battery control circuit for controlling the power supply to the circuit from the battery in response to an instruction of the circuit.   In the means (3) for receiving the biological information, means (32) for receiving a radio signal received by the antenna 31, and a data demodulation circuit (33) for demodulating data from the received signal obtained by the receiving means. The heart rate telemeter system according to claim 1, further comprising a data transfer circuit (34) for transferring data of the data demodulation circuit to a processor, and a timing circuit for controlling the receiving device (3).   In the data processing means (4), means (41) for analyzing the received data, means (43) for storing the analysis processing data, means (42) for displaying the analysis data, 2. The heart rate telemeter system according to claim 1, further comprising marking means (44) for marking the display data with a time display or a mark having some meaning. The R-wave synchronization circuit (24) includes a signal gate (24a) that allows a heartbeat signal to pass through, a heartbeat waveform measurement unit (24b) that measures and determines the waveform of the signal that has passed through the signal gate, and the heartbeat is measured by a meter. A heart rate cycle measurement unit (24d) that performs cycle measurement using the signal obtained by the unit, and reproduces a signal equivalent to the heart rate cycle by using the cycle information obtained by the heart rate cycle measurement unit to generate a gate signal The heart rate telemeter system according to claim 2, further comprising a heart rate cycle reproduction unit (24c) provided as

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