KR100848604B1 - Portable device for measuring blood flow - Google Patents

Abstract

The present invention relates to a portable blood flow measuring device, comprising: a Doppler sensor built in a main body and attached to a rear surface to transmit and receive an ultrasonic Doppler from a transmitting and receiving unit; A filtering and frequency conversion circuit unit built in the main body and configured to be converted into a frequency for being digitized and displayed while the frequency received by the Doppler sensor is filtered; An output circuit unit configured to visually identify a signal of the circuit unit; A band mounted to the main body such that a Doppler sensor is adjacent to the skin; Is installed on the main body is made of a control unit consisting of a plurality of buttons for switching the power of the Doppler sensor and the display unit.

Because of this, after wearing a blood flow measurement device configured in the wristwatch or in the form of a wristwatch on the wrist, it is possible to check the physical condition of the subject to be measured at any time without limitation of time and space, thereby preventing disease And management can be made easily so that you can always maintain a healthy state.

Blood Flow Monitor, Radial Artery, Pulse, Doppler, Watch

Description

Portable device for measuring blood flow

1 is a plan view schematically showing a portable blood flow measuring apparatus according to an embodiment of the present invention,

2 is a rear view of FIG. 1;

3 is a flowchart of a circuit embedded in the measuring apparatus shown in FIG. 1;

4 is a block diagram of FIG.

<Brief description of the main symbols in the drawings>

100 blood flow measurement device ...

120 ... band 130 ... Doppler sensor,

132 ... transmitter 134 ... receiver,

140 ... filtering and frequency conversion circuit section 10 ... analog circuit,

20 digital circuit 150 output circuit section,

152 Display 160 Control unit.

The present invention relates to a portable blood flow measuring device, and more particularly, to a portable blood flow measuring device which is worn on the wrist to measure the blood flow of the wrist of the human body, that is, the radial artery, by using an ultrasonic doppler.

In general, in one shot, in order to check for abnormalities such as diseases of the human body, the radial artery is usually checked to check the pulse.

On the basis of this, in order to satisfy the high health concern of modern people, a device that can always carry around and check the pulse regardless of time and place when necessary is required.

On the other hand, there are always wristwatches that can be carried around the wrist, and the wristwatches also have advanced technology. Recently, they have built-in chips for public transportation or mp3 function to listen to music on the go. It also became.

In addition, the watch is worn on the wrist of the human body, that is, the radial is located close to the radial artery.

Therefore, there is a need for a blood flow measuring device in which a wrist watch and a device capable of measuring the blood flow state of the radial artery are combined to measure the change of the human body at all times in order to prevent and manage diseases.

The present invention has been made in order to solve the above-described proposal, the body and the band portion is provided in the form of a wrist watch to be worn on the watch or wrist, blood flow measured by the ultrasonic Doppler sensor built in the watch or the body The signal is obtained by the filtering and frequency conversion circuitry, and the obtained information is made visible to the naked eye through the display.

Therefore, by providing a portable blood flow measurement device that is easy to carry, as well as by measuring the blood flow state of the radial artery regardless of time and place, it is possible to check the changes in the human body, such as cardiac output, pulse rate, and manage the disease at any time. There is a purpose.

Portable blood flow measurement apparatus according to the present invention for achieving the above object, the Doppler sensor is built in the main body and attached to the rear, the Doppler sensor to transmit and receive the ultrasonic Doppler from the transmitter and receiver; A filtering and frequency conversion circuit unit built in the main body and configured to be converted into a frequency for being digitized and displayed while the frequency received by the Doppler sensor is filtered; An output circuit unit configured to visually identify a signal of the circuit unit; A band mounted to the main body such that a Doppler sensor is adjacent to the skin; Is installed on the main body is made of a control unit consisting of a plurality of buttons for switching the power of the Doppler sensor and the display unit.

The transmitter of the Doppler sensor is configured with an oscillator circuit for outputting a transmission frequency to the Doppler sensor probe by using any one of the IC selected from TR, TTL, and Gate, the low voltage of the ultrasonic sensor probe by the RF transformer included in the circuit It is made to step up to a voltage suitable for driving.

On the other hand, the filtering and signal conversion circuit unit is installed between the high frequency and low frequency filter for filtering the high frequency and low frequency noise to filter the frequency measured by the receiver, and the analog for amplifying the frequency is installed between the high frequency and low frequency filter A frequency calculator configured to mix an amplifier, a frequency from which noise of high and low frequencies is removed, and a frequency of the transmitter to convert the two signals into a difference and an agreement frequency and output an audio frequency of kHz band, and a frequency calculated by the frequency calculator. A frequency-to-voltage converter configured to convert the voltage into a voltage and convert the voltage into a state before the final audio filtering, and digitize the analog circuit installed to operate in conjunction with the Doppler sensor and the analog frequency passed through the analog circuit. / D frequency The microprocessor is configured to compare and analyze the converter and the frequency converted by the A / D frequency converter as output standby information. And digital circuitry having a storage device adapted to interoperate with the microprocessor.

In addition, the output circuit unit is a display configured to switch the screen by the control unit while the information stored in the digital circuit is visually identifiable, a wireless communication unit for wirelessly transmitting information stored in the digital circuit, and a digital circuit When a difference between the stored information and the inputted basic information occurs, an alarm device configured to alert by a signal of the microprocessor is included.

On the other hand, the operating method of the portable blood flow measuring device using the Doppler ultrasound is the step of transmitting the Doppler and receiving the echoed Doppler (S1); The high frequency and low frequency noise is alternately removed among the received frequencies, and the frequency is amplified during the removal. The reduced frequency is converted into a voltage value while the band of the frequency from which the noise is removed is reduced from Mhz to kHz. Filtering and calculating (S2) configured to filter the frequency; An A / D conversion step S3 in which an analog frequency converted into high quality audio is digitized in this step S2; Waiting for the digitized information to be compared with the basic information before being output (S4); A step S5 of storing the analyzed information of this step S4 for a long time; And step S6 output by the output circuit 150.
Hereinafter, a portable blood flow measuring apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

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1 is a plan view schematically illustrating a portable blood flow measuring apparatus according to a preferred embodiment of the present invention, FIG. 2 is a rear view of FIG. 1, and FIG. 3 is a flowchart of a circuit embedded in the measuring apparatus shown in FIG. 1. 4 is a block diagram of FIG. 3.

First, as shown in Figures 1 to 3, the portable blood flow measurement apparatus 100 according to a preferred embodiment of the present invention in the form of a wristwatch or wrist watch that includes the body 110 and the band 120 A filtering and frequency conversion circuit fabricated and equipped with the ultrasonic Doppler sensor 130 mounted on the main body 110 and the frequency obtained by the Doppler sensor 130 while filtering and converting the frequency into an information state before display. The unit 140, the display unit 150 mounted on the main body so that the information of the filtering and frequency conversion circuit unit 140 is displayed, the screen switching of the display unit 150 and the operation relationship between the Doppler sensor 130 Control unit 160 to control is made to include.

The band 120 is preferably made of an elastic member so that the Doppler sensor 130 mounted on the main body 110 is in close contact with the skin to obtain a high frequency frequency for blood flow such as a radial artery pulse.

The control unit 160 is composed of a plurality of buttons protruding from the side of the main body 110, etc., each of these buttons is the power of the measuring device 100 and the operation of the Doppler sensor 130, the display unit 150 It is configured to be able to switch the screen.

The Doppler sensor 130 is preferably installed to ensure a position capable of maintaining a minimum proximity distance to the radial artery, and thus may be attached to the rear outer surface as shown in the drawing of the main body 110, and the main body 110. It can also be attached to the inner back of the.

Here, the Doppler ultrasound is classified into a pulsed Doppler and a continuous wave Doppler, and in the case of the portable blood flow measuring apparatus 100, since the focus of the Doppler transmission and reception is shaken during the measurement, the comprehensive blood flow signal may be measured for a wide range of regions rather than the concentrated signal. It is preferred that continuous wave Doppler be used.

The Doppler sensor 130 includes a transmitter 132 and a receiver 134 to transmit and transmit the ultrasonic Doppler.

The transmitter 132 is configured to output an oscillator circuit for outputting a transmission frequency suitable for the Doppler sensor probe using an IC such as TR, TTL, or Gate, and outputs the same to the Doppler sensor probe.

In this case, the Doppler transmission signal may be attenuated due to the mismatch of the impedance caused by the ultrasonic sensor probe. In order to improve this, an RF transformer is additionally installed so that the impedance is properly matched so that the maximum output of the frequency is induced. While the conventional TTL level voltage is boosted to a voltage suitable for driving the Doppler sensor probe.

The receiver 134 is configured such that the frequency of the reflected state of the Doppler is amplified by the amplifier.

On the other hand, the filtering and frequency conversion circuit unit 140 is installed to operate in conjunction with the Doppler sensor 130, the analog circuit 10 is configured to filter the frequency measured by the receiver 134, and the analog circuit 10 The digital circuit 20 is configured to convert the analog frequency of the digital signal into a digital frequency so as to be temporarily and long-term stored in the information state before the display.

The analog circuit 10 includes a high pass filter 11 for removing low frequency noise due to a small vibration of a blood vessel wall to filter the frequency measured by the receiver 134, and a low pass filter 13 for removing high frequency noise. ) Is included.

In addition, the analog circuit 10 installs an amplifier 12 between the high frequency and low pass filters 11 and 13 to amplify the weakened frequency to the maximum while eliminating low frequency noise.

The analog circuit 10 further includes a frequency calculator 14 for reducing the band of the frequency passing through the low pass filter 13.

Since the frequency calculating unit 14 requires expensive equipment to process the frequency of the receiving unit 134 of the RF signal of the MHz band, in order to improve the frequency, the frequency passing through the low pass filter 13 is reduced to the kHz band. do.

The frequency calculating unit 14 is configured to mix the frequency of the receiving unit 134 and the frequency of the transmitting unit 132 to convert the difference between the two signals and the sum frequency, and the difference and the sum frequency are the kHz audio frequency. It is configured to suppress the occurrence of various spurious or harnomics that can occur.

In addition, the analog circuit 10 further includes a frequency-voltage signal converter 15 for converting a frequency passed through the frequency calculator 14 into a voltage value.

Since the frequency-voltage signal converter 15 is strictly speaking about the frequency of the kHz band output from the frequency calculator 14, it is an audio frequency transformed from the frequency of the first transmitter 132. It is required, but in order to improve this, the frequency is converted into a voltage value.

In addition, the analog circuit 10 further includes an audio filter 16 for final filtering on the audio frequency passed through the frequency-voltage signal converter 15.

On the other hand, the digital circuit 20 is an A / D frequency converter 21 for digitizing the analog frequency passed through the analog circuit 10, and the frequency converted by the A / D frequency converter 21 output standby state And a microprocessor 22 configured to compare and analyze the information with previously inputted basic information.

In addition, the storage device 23 is further included to exchange information with the microprocessor 22 while the information of the microprocessor 22 is stored for a long time.

The microprocessor 22 temporarily stores the digitized frequency in an information state before output, and compares and analyzes the digitized frequency with the basic information previously inputted to alert the output circuit 150 to be described later if the health state of the measurement target is poor. A signal is sent to the device 156 to activate the alarm sound and alarm light.

The storage device 23 is configured to exchange information with the microprocessor 22 while allowing the information of the microprocessor 22 to be stored for a long time, so as to transmit the accumulated information upon request of the microprocessor 22.

The output circuit 150 includes a display 152 such that the information of the microprocessor 22 can be visually identified.

The display 152 is configured to switch the screen by the control unit 160 installed in the main body 110.

In addition, the output circuit 150 wirelessly receives the information of the microprocessor 22, the wireless communication device 154 to be stored and output in a server (server) and display 152, such as a mobile phone, home or hospital Is made to include more.

The wireless communication device 154 may be a commonly used Zigbee, RFID, Bluetooth, and the like.

In addition, when the output circuit 150 approaches a risk level based on a difference between the information and the basic information of the measurement subject by the analysis of the microprocessor 22, an alarm device 156 that can immediately notify the measurement subject. Is made to include more.

The alarm device 156 may be operated by generating an alarm sound or flashing an alarm lamp.
Hereinafter, the portable blood flow measuring device according to the present invention will be briefly described based on the operation procedure.

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First, when the Doppler sensor 130 is operated by wearing the blood flow measuring apparatus 100 on the wrist and operating the control unit 160, the Doppler is sent and received by the transmitting and receiving units 132 and 134 to the high pass filter 11. The signal is transmitted to the frequency calculator 14 via the analog amplifier 12 and the low pass filter 13.

At this time, the frequency calculator 14 mixes the frequency passed by the low pass filter 13 and the frequency of the transmitter 132 to generate a difference and a sum frequency to reduce the audio frequency in the kHz band.

When the band is reduced in pressure, the frequency is converted to the A / D converter 21 through the frequency-voltage converter 15 and the audio filter 16, and is compared and analyzed with the basic information inputted from the microprocessor 22. The operation information is sent to the alarm device 156 according to the analyzed information, or the real-time measurement information of the measurement subject is displayed on the display 152.

In addition, the measurement information of the measurement subject is stored and displayed by the wireless communication device 154 in a server and the display 152 of any place in the near or far distance, that is, a mobile phone, a home or a hospital.
On the other hand, the method of operating the portable blood flow apparatus 100, as shown in Figure 3 and 4, the step of sending the Doppler from the Doppler sensor 130 and receiving the echoed Doppler (S1); Filtering and calculating the received frequency in an analog circuit (S2); An A / D conversion step S3 in which the frequency converted into high quality audio in this step S2 is digitized by the A / D converter 21; Comparing the digitized information with the basic information by the microprocessor 22 and waiting before outputting (S4); A step S5 in which the analyzed information of the step S4 is stored in the storage device 23 for a long time and a step S6 outputted by the output circuit 150 are included.

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In the transmitting / receiving step (S1), the Doppler ultrasound is transmitted by the transmitter 132, and the transmitted echo is received by the receiver 134.

In addition, in the filtering and calculating step (S2), high and low frequency noises are removed by the high and low pass filters 11 and 13 to remove high and low frequency noises, and the high and low pass filters 11 and 13 are removed. The frequency is amplified by the analog amplifier 12 located between the), the frequency band is reduced by the frequency calculating section 14 and the frequency is converted into an audio frequency of the voltage value by the frequency-voltage signal converter 15 The audio filter 16 is then filtered on the converted audio frequency.

The A / D conversion step S3 is performed to convert the audio frequency of the analog filtered by the A / D converter 21 to digital.

The information digitized in the analysis step S4 and the storage step S5 and the basic information inputted in advance are compared and analyzed by the microprocessor 22, and the resultant values are stored for a long time. The operation signal is sent to the alarm device 156 to be described later in the output step (S6).

The output step (S6) is installed so as to be associated with the microprocessor 22 so that the result is displayed 152 or operated as an alarm device 156 or displayed or stored in a mobile phone, home, hospital, etc. via the wireless communication device 154 Is done.

According to the present invention as described above, the blood flow measurement device configured in the wristwatch or manufactured in the form of a wristwatch is worn on the wrist so that the physical condition of the subject can be checked at any time without limitation of time and space, and through this disease Prevention and management of the can be made easily has the effect of maintaining a healthy state at all times.

Claims (5)

A Doppler sensor embedded in the main body and attached to the rear side to transmit and receive an ultrasonic Doppler from a transmitting and receiving unit, a band mounted to the main body so that the Doppler sensor is close to the skin, a power supply of the Doppler sensor installed on the main body, and In the blood flow measurement device consisting of a control unit consisting of a plurality of buttons for screen switching of the display unit, The filtering and frequency conversion circuit is built in the main body and configured to convert the frequency received by the Doppler sensor into a frequency for digitization and display while filtering the high frequency and low frequency noise so as to filter out the high frequency and low frequency noise to filter the frequency measured by the receiver. The difference between the two signals is a mixture of a low pass filter, an analog amplifier installed between the high frequency and low pass filters to amplify the frequency, a frequency through which the noise of high frequency and low frequency is removed through the low pass filter, and a frequency of a transmission unit. A frequency calculator configured to convert the frequency to the sum of the frequency and the sum, and output the audio frequency in the kHz band, a frequency-voltage converter configured to convert the frequency calculated by the frequency calculator into a voltage and convert the frequency to a state before final audio filtering; remind Portable blood flow measurement device is associated with the Doppler sensor signal of the circuit is installed for operation consisting of the output circuit configured to be visually identified. delete delete delete delete

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