WO2010071043A1 - 電子血圧計 - Google Patents
電子血圧計 Download PDFInfo
- Publication number
- WO2010071043A1 WO2010071043A1 PCT/JP2009/070472 JP2009070472W WO2010071043A1 WO 2010071043 A1 WO2010071043 A1 WO 2010071043A1 JP 2009070472 W JP2009070472 W JP 2009070472W WO 2010071043 A1 WO2010071043 A1 WO 2010071043A1
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- WIPO (PCT)
- Prior art keywords
- battery
- control unit
- value
- voltage
- switching control
- Prior art date
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/02233—Occluders specially adapted therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0025—Sequential battery discharge in systems with a plurality of batteries
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
- A61B2560/0214—Operational features of power management of power generation or supply
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/20—The network being internal to a load
- H02J2310/23—The load being a medical device, a medical implant, or a life supporting device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
Definitions
- the present invention relates to an electronic sphygmomanometer, and more particularly to an electronic sphygmomanometer equipped with a battery.
- the electronic blood pressure monitor is driven by a primary battery (hereinafter referred to as “dry battery”), an AC (Alternating Current) adapter, or a secondary battery (hereinafter referred to as “rechargeable battery”).
- dry battery a primary battery
- AC (Alternating Current) adapter a secondary battery
- rechargeable battery a secondary battery
- Patent Document 1 proposes a technique for notifying the number of remaining measurements from the voltage value of the battery.
- the battery capacity consumption is affected by the pressurization time and environmental temperature of the pump depending on the arm circumference and blood pressure value (maximum blood pressure), it is difficult to accurately indicate the remaining number of measurements. Therefore, in the above conventional technique, there is a possibility that the dry battery may be replaced or the rechargeable battery may be charged although the measurement can still be performed. On the other hand, even if the number of measurements is 1 or more, there is a possibility that the capacity becomes insufficient during the measurement and the measurement cannot be continued.
- the present invention has been made to solve the above-described problems, and an object thereof is to provide an electronic sphygmomanometer that can be measured when a user wants to perform measurement and can use a battery efficiently. It is to be.
- An electronic sphygmomanometer is an electronic sphygmomanometer for measuring a blood pressure of a measurement subject, and detects a cuff for winding around a predetermined body part of the measurement subject and a pressure in the cuff.
- An electronic sphygmomanometer including a primary battery and a secondary battery including a pressure sensor for measuring, a measurement control unit for performing control for measuring blood pressure of the measurement subject, and a primary battery and a secondary battery based on a signal from the pressure sensor Based on the detection result of the feature value detection unit, the characteristic value detection unit for detecting the characteristic value of each of the primary battery and the secondary battery, and the primary battery and the secondary battery A switching control unit for performing switching control.
- the characteristic value is a value related to the remaining amount of each of the primary battery and the secondary battery.
- the solar cell further includes a solar cell for receiving sunlight and converting the received light energy into electrical energy, and the secondary battery stores electrical energy generated by the solar cell.
- the switching control unit predicts the weather based on a signal from the pressure sensor, and selects the primary battery or the secondary battery according to the weather prediction result.
- the secondary battery is selected, and when the feature value of the secondary battery is less than the first threshold, the weather The primary battery or the secondary battery is selected according to the prediction result.
- the switching control unit sets the first battery when the feature value of the first battery determined to be used preferentially among the primary battery and the secondary battery is larger than the first threshold value.
- a first selection processing unit for selecting the second battery that is the other battery is included.
- the apparatus further includes a pressurizing unit for pressurizing the cuff using the power supplied from the power supply unit as a drive source
- the switching control unit further includes a pressurizing unit when the first battery is selected at the time of startup.
- the switching control unit further determines that the voltage of the first battery during pressurization by the pressurization unit is When it is determined that the third threshold value is lower than the second threshold value, the second battery is switched to the first battery again.
- the third threshold value may be a value equal to the first threshold value or a value higher than the first threshold value.
- the switching control unit preferentially selects one of the primary battery and the secondary battery that is designated in advance by the user.
- the apparatus further includes a generation unit for generating an alarm sound at a specific timing designated by the user, and the switching control unit further includes a detection result by the feature value detection unit when the specific timing arrives. Switching control between the primary battery and the secondary battery is performed.
- the feature value represents one of a voltage value, a voltage level based on the voltage value, and a measurable number of times calculated based on the voltage value.
- the primary battery and the secondary battery are provided, and both of them can be switched based on the characteristic values related to the respective remaining amounts. Therefore, it is possible to avoid a situation in which measurement cannot be performed unexpectedly. Moreover, both battery remaining charge can be used efficiently.
- FIG. 1 is a diagram showing an external appearance of a sphygmomanometer 1 according to Embodiment 1 of the present invention.
- sphygmomanometer 1 includes a main body portion 10, a cuff 20 for wrapping around the upper arm of the measurement subject, and an air tube 24 for connecting the main body portion 10 and the cuff 20. .
- FIG. 2 is a perspective view of main body 10 according to Embodiment 1 of the present invention as viewed from the rear.
- main body 10 is a pentahedron, an installation surface in contact with a table such as a desk, a surface 10 ⁇ / b> A forming a predetermined angle with the installation surface, and a surface perpendicular to the installation surface. And have two side surfaces 10B and 10C and a back surface 10D.
- a display unit 40 for displaying measurement results and an operation unit 41 for receiving an instruction input from a user (typically a person to be measured) are arranged on the surface 10A of the main body unit 10.
- the operation unit 41 for example, a power switch 41A for switching power ON / OFF, a measurement switch 41B for inputting a measurement start instruction, and an instruction for reading and displaying past measurement results. And a memory switch 41C.
- the display part 40 is comprised by displays, such as a liquid crystal, for example.
- the air tube 24 described above is connected to the left side surface 10 ⁇ / b> B of the main body 10.
- a solar cell (solar panel) 50 is disposed on the back surface 10D of the main body 10.
- the solar cell 50 receives sunlight and converts the received light energy into electrical energy. That is, the solar cell 50 generates electrical energy according to the amount of received light.
- the generated electrical energy is output to a rechargeable battery (secondary battery) 51 (see FIG. 3) built in the main body 10.
- FIG. 3 is a block diagram showing a hardware configuration of sphygmomanometer 1 according to the first embodiment of the present invention.
- the cuff 20 of the sphygmomanometer 1 includes an air bag 21 in which air is contained.
- the air bladder 21 is connected to an air system 25 built in the main body 10 via an air tube 24.
- the air system 25 includes a pressure sensor 32 for detecting the pressure in the air bag 21 (hereinafter referred to as “cuff pressure”), a pump 33 for supplying air to the air bag 21, and the air in the air bag 21. And an exhaust valve 34 that is opened and closed for draining or sealing.
- a pressure sensor 32 for detecting the pressure in the air bag 21 (hereinafter referred to as “cuff pressure”)
- a pump 33 for supplying air to the air bag 21, and the air in the air bag 21.
- an exhaust valve 34 that is opened and closed for draining or sealing.
- the main body unit 10 measures a time (CPU) 100, a non-volatile memory 39, a display unit 40, an operation unit 41, a power supply unit 60, and a time for centrally controlling and monitoring each unit.
- the main body 10 further includes an oscillation circuit 35, a pump drive circuit 36 for driving the pump 33, and a valve drive circuit 37 for driving the exhaust valve 34 in association with the air system 25.
- the pump drive circuit 36 controls the drive of the pump 33 based on a control signal given from the CPU 100.
- the valve drive circuit 37 performs opening / closing control of the exhaust valve 34 based on a control signal given from the CPU 100.
- the capacity value of the pressure sensor 32 changes depending on the cuff pressure.
- the oscillation circuit 35 outputs a signal having an oscillation frequency corresponding to the capacitance value of the pressure sensor 32 to the CPU 100.
- the CPU 100 detects the pressure by converting the signal obtained from the oscillation circuit 35 into a pressure.
- the memory 39 stores various programs and various data.
- the memory 39 includes a measurement result storage area for storing blood pressure measurement results.
- the power supply unit 60 includes a rechargeable battery 51 for storing electrical energy generated by the solar battery 50, a detachable dry battery (primary battery) 52, and a power supply control circuit 53.
- the power supply unit 60 may further include an AC adapter (not shown) for rapidly charging the rechargeable battery 51.
- the power supply control circuit 53 is electrically connected to the rechargeable battery 51 and the dry battery 52, and selectively supplies the electric power stored in both to various devices such as the pump drive circuit 36 and the valve drive circuit 37.
- the power supply control circuit 53 is electrically connected to the CPU 100 and transmits / receives signals to / from the CPU 100. A configuration example of the power supply control circuit 53 will be described later.
- the rechargeable battery 51 is, for example, a nickel metal hydride battery.
- the dry battery 52 is, for example, an alkaline battery.
- FIG. 4 is a functional block diagram of sphygmomanometer 1 according to the first embodiment of the present invention.
- power supply control circuit 53 includes voltage detection unit 56 for detecting the voltage of rechargeable battery 51, voltage detection unit 57 for detecting the voltage of dry battery 52, rechargeable battery 51 and dry battery 52. And a switching unit 58 for switching the output of.
- the remaining battery level can be detected (estimated) based on the voltage. Therefore, also in the present embodiment, the voltage is detected as a feature value (correlated) related to the remaining amount of each of the batteries 51 and 52. However, the voltage is not limited as long as it has a correlation with the remaining amount.
- the switching unit 58 is configured by a switch, for example.
- voltage detection units 56 and 57 are included in power supply control circuit 53 of power supply unit 60, but these may be provided independently of power supply unit 60.
- the CPU 100 includes a switching control unit 102, a measurement control unit 104, and an alarm control unit 106 as its functions.
- the switching control unit 102 performs switching control of the rechargeable battery 51 and the dry battery 52 based on the voltage value detected by the voltage detection units 56 and 57. More specifically, a control signal is transmitted to the switching unit 58 to cause the switching unit 58 to select one of the rechargeable battery 51 and the dry battery 52. Detailed switching control will be described later.
- the measurement control unit 104 controls the pump drive circuit 36 and the valve drive circuit 37 shown in FIG.
- the measurement control unit 104 calculates a blood pressure value (for example, maximum blood pressure, minimum blood pressure) based on a signal (cuff pressure signal) from the oscillation circuit 35 shown in FIG. 3 according to, for example, an oscillometric method. Further, the pulse rate is calculated according to a known method.
- the alarm control unit 106 is connected to the buzzer 44 shown in FIG. 3 and performs control for generating an alarm sound at a specific timing (for example, date and time) designated by the user.
- each functional block may be realized by executing software stored in the memory 39, and at least one of these functional blocks may be realized by hardware.
- the memory 39 stores information indicating that the rechargeable battery 51 is used preferentially, that is, the rechargeable battery priority mode.
- the battery to be preferentially used may be determined in advance by default when the blood pressure monitor 1 is shipped. Alternatively, the user may be able to specify (set and change) by operating the operation unit 41.
- FIG. 5 is a flowchart showing processing (hereinafter referred to as “measurement-related processing”) executed by the CPU 100 in relation to blood pressure measurement control in the first embodiment of the present invention.
- the processing shown in the flowchart of FIG. 5 is stored in advance in the memory 39 as a program, and the CPU 100 reads and executes this program.
- step S102 a power source selection process at the time of activation is executed. This process will be described in detail with reference to a subroutine in FIG.
- FIG. 6 is a flowchart showing power source selection processing according to Embodiment 1 of the present invention.
- the rechargeable battery 51 is selected in the switching unit 58. Further, it is assumed that the remaining amount of the dry battery 52 is sufficient. That is, it is assumed that the voltage of the dry battery 52 obtained from the voltage detection unit 57 is equal to or higher than a threshold value THm (for example, 4.5 V) described later.
- THm for example, 4.5 V
- switching control unit 102 determines whether or not the voltage of rechargeable battery 51 is greater than a predetermined threshold value THm (step S212).
- the voltage of the rechargeable battery 51 is obtained from the output from the voltage detection unit 56 shown in FIG.
- Threshold value THm may be a value equal to or higher than a voltage necessary for completing at least one blood pressure measurement process. Here, for example, it is a value obtained by adding a predetermined value to the voltage required for completing one blood pressure measurement process.
- switching control unit 102 selects rechargeable battery 51 (step S214). Since the rechargeable battery 51 is selected at the beginning of the process, the switching control unit 102 does not switch the power source in this case.
- switching control unit 102 selects dry battery 52 (step S216). In this case, the switching control unit 102 performs power source switching processing. That is, a control signal is transmitted to the switching unit 58 so as to select the dry battery 52.
- step S216 it is preferable that the CPU 100 informs the rechargeable battery 51 to be charged.
- step S214 the switching control unit 102 displays on the display unit 40 whether the battery used is the rechargeable battery 51 or the dry battery 52 (step S218).
- the measurement control unit 104 starts driving the pump 33 and gradually increases the pressure of the air bladder 21 (step S106).
- the rechargeable battery 51 is selected for the switching unit 58 of the power supply control circuit 53
- the electric power stored in the rechargeable battery 51 becomes a drive source for the pump 33.
- the dry battery 52 is selected for the switching unit 58 of the power supply control circuit 53
- the electric power stored in the dry battery 52 becomes the drive source of the pump 33.
- the measurement control unit 104 stops the pump 33, gradually opens the closed exhaust valve 34, and gradually exhausts the air in the air bladder 21. Thereby, the cuff pressure is gradually reduced (step S107).
- the measurement control unit 104 calculates blood pressure (maximum blood pressure, minimum blood pressure) by a known method (step S108). Specifically, in the process of gradually decreasing the cuff pressure, the measurement control unit 104 extracts pulse wave information based on the oscillation frequency obtained from the oscillation circuit 35. Then, the blood pressure is calculated from the extracted pulse wave information. The measurement control unit 104 may further calculate the pulse rate.
- the blood pressure is calculated based on the pulse wave information obtained in the decompression process, but the blood pressure may be calculated based on the pulse wave information obtained in the pressurization process.
- the measurement control unit 104 displays the measurement result, that is, the blood pressure value and the pulse rate calculated in step S108 on the display unit 40 (step S110).
- the measurement result is stored in a measurement result storage area (not shown) in the memory 39 (step S112).
- measurement data including a measurement date and a measurement value (maximum blood pressure, minimum blood pressure, pulse rate) is stored in a record format for each measurement.
- step S102 a series of measurement processes is completed (power OFF). It is assumed that the battery selected in the power source selection process (step S102) is continuously selected even after the measurement process is completed.
- the dry battery 52 is selected. Therefore, the situation where the capacity of the rechargeable battery 51 becomes insufficient during the measurement and the measurement is stopped can be surely avoided.
- the rechargeable battery priority mode is taken as an example, but the same processing can be performed even in a mode in which the dry battery 52 is preferentially used, that is, in the dry battery priority mode.
- the above-described power source selection process is performed only at the time of startup, but may be performed at other timings as long as the phase is not related to blood pressure measurement control. For example, it may be executed when charging of the rechargeable battery 51 is completed, when the dry battery 52 is inserted, or when an instruction for power source switching control is input by the user.
- the sphygmomanometer including an automatic pressurizing unit for example, the pump 33, the exhaust valve 34, etc.
- a sphygmomanometer including an automatic pressurizing unit for example, a rubber ball
- the pump 33, the exhaust valve 34, the pump drive circuit 36, and the valve drive circuit 37 shown in FIG. 3 are unnecessary.
- the sphygmomanometer may include a rubber ball (not shown) connected to the air bladder 21 via the tube 24.
- the sphygmomanometer 1 since the sphygmomanometer 1 according to the present embodiment includes the solar battery 50, it may not be possible to charge the rechargeable battery 51 when the weather is cloudy or rainy. Therefore, power supply switching control may be performed based on not only the battery voltage but also the weather prediction result.
- FIG. 7 is a flowchart showing the power supply selection process in the first modification of the first embodiment of the present invention.
- the remaining measurable number of times (referred to as “remaining number of times of measurement”) is used in place of the voltage as the characteristic value related to the remaining battery level.
- switching control unit 102 calculates the remaining number of measurements of rechargeable battery 51 and displays it on display unit 40 (step S222).
- the remaining number of measurements is calculated based on, for example, the voltage of the rechargeable battery 51 and a data table (stored in the memory 39) in which the relationship between the voltage and the number of measurements is defined in advance.
- the feature value (remaining measurement count) in this modification is a value calculated by the CPU 100 based on the outputs from the voltage detection units 56 and 57.
- step S224 determines whether or not the calculated number of remaining measurements is 20 or more. If the remaining number of measurements is 20 or more (YES in step S224), the process proceeds to step S228. On the other hand, if the remaining number of measurements is less than 20 (NO in step S224), the process proceeds to step S225.
- step S225 the switching control unit 102 performs a weather prediction process.
- the switching control unit 102 predicts weather using the pressure sensor 32.
- the pressure sensor 32 detects an absolute value or a relative value of atmospheric pressure.
- the switching control unit 102 periodically receives a signal from the oscillation circuit 35 and records the absolute value or relative value trend of the atmospheric pressure in the memory 39. Then, for each predetermined time (for example, 6 hours), future weather (for example, weather after 3 hours) is predicted based on the trend of the absolute value or the relative value of the atmospheric pressure.
- a weather prediction method a known method may be employed.
- step S226 determines whether or not the remaining measurement count is 10 or more and the weather prediction is clear. If the condition is satisfied (YES in step S226), the process proceeds to step S228. On the other hand, if the condition is not satisfied (NO in step S226), the process proceeds to step S230.
- step S228, the switching control unit 102 selects the rechargeable battery 51.
- a switching signal is transmitted to the switching unit 58 only when the dry battery 52 is selected when the power is turned off.
- step S230 the switching control unit 102 selects the dry battery 52.
- a switching signal is transmitted to the switching unit 58 only when the rechargeable battery 51 is selected when the power is turned off.
- step S228 or step S230 When the process of step S228 or step S230 is completed, the power supply selection process is terminated.
- the threshold value (20 times, 10 times) used for the determination of the remaining number of measurements may be fixed (predetermined value) or may be set based on the measurement data recorded in the memory 39. In the latter case, the switching control unit 102 calculates the average number of measurements per day of the person being measured, sets the first threshold (step S224) for two days, and sets the second threshold (step S226) for one day. May be minutes.
- the user may be able to set and change the two threshold values directly.
- the remaining number of measurements is used as a feature value related to the remaining battery level, but the battery voltage may be used as in the first embodiment.
- the feature value related to the remaining battery level corresponds to the voltage in the first embodiment and the remaining number of measurements in the first modification of the first embodiment, but may represent a voltage level.
- the power source switching control based on the voltage level of the rechargeable battery 51 will be described below. For the sake of simplicity, the description will be made in comparison with the first modification.
- FIG. 8 is a flowchart showing the power supply selection process in the second modification of the first embodiment of the present invention.
- the same step numbers are assigned to the same processes as the power source selection process shown in FIG. Therefore, description thereof will not be repeated here.
- steps S222A, S224A, and S226A are executed instead of steps S222, S224, and S226 in FIG.
- step S222A the switching control unit 102 calculates the voltage level of the rechargeable battery 51 and displays it on the display unit 40.
- the voltage level is calculated based on, for example, the voltage of the rechargeable battery 51 and a data table (stored in the memory 39) in which the relationship between the voltage and the voltage level (for example, levels 0 to 3) is defined in advance.
- the feature value (voltage level) in the present modification is also a value calculated by the CPU 100 based on the outputs from the voltage detection units 56 and 57.
- FIG. 9 is a diagram illustrating a display example according to the voltage level of the rechargeable battery 51.
- the switching control unit 102 determines whether or not the voltage level of the rechargeable battery 51 is level 2 or higher.
- step S226A the switching control unit 102 determines whether or not the voltage level of the rechargeable battery 51 is level 1 or higher and the weather prediction is clear.
- Embodiment 1 and Modification 2 may be combined. That is, the switching control unit 102 does not have to perform weather prediction.
- the user may be able to select which of the remaining measurement count and the voltage level is the feature value. Thereby, it becomes possible to switch a power supply at a desired timing for every user. Moreover, since the desired feature value is displayed directly or indirectly, usability can be improved.
- the power source switching control is executed only once at the time of startup.
- the power source switching control is executed a plurality of times at the timing related to the blood pressure measurement process.
- the configuration of the blood pressure monitor and its basic operation in the present embodiment are the same as those in the first embodiment. Accordingly, only the parts different from the first embodiment will be described below by taking the blood pressure monitor 1 shown in FIGS. 1 to 4 as an example. It is assumed that blood pressure monitor 1 in the present embodiment includes an automatic pressurizing unit.
- FIG. 10 is a flowchart showing measurement-related processing in the second embodiment of the present invention.
- the processing shown in the flowchart of FIG. 10 is also stored in advance in the memory 39 as a program, and the CPU 100 reads and executes this program.
- the switching control unit 102 executes a power source selection process at startup (steps S402, S404, and S406).
- the dry battery 52 is selected by the switching unit 58 at the start of the process. Further, it is assumed that the remaining capacity of the rechargeable battery 51 is sufficient. That is, it is assumed that the voltage of the rechargeable battery 51 obtained from the voltage detection unit 56 is equal to or higher than the threshold value THm described in the first embodiment.
- the switching control unit 102 determines whether or not the voltage of the dry battery 52 is greater than a threshold value THo (for example, 4.1 V).
- the threshold value THo represents, for example, a voltage value at which the sphygmomanometer 1 can be operated at a minimum (for example, the display unit 40 and the operation unit 41 can be activated). That is, even if the voltage of the dry battery 52 is about the threshold value THo, it means that the dry battery 52 alone cannot be pressurized to an appropriate value (for example, 180 mmHg).
- the switching control unit 102 selects the dry battery 52 (step S404).
- switching control unit 102 selects rechargeable battery 51 (step S406). In this case, the switching control unit 102 performs power source switching processing. That is, a control signal is transmitted to the switching unit 58 so as to select the rechargeable battery 51.
- the switching control unit 102 displays on the display unit 40 which of the rechargeable battery 51 and the dry battery 52 is used. The same applies to the following power source selection process.
- step S410 a measurement start instruction is input by the user. Then, pressurization control is executed (step S410). The pressurization control will be described with reference to a subroutine in FIG.
- FIG. 11 is a flowchart showing pressurization control in the second embodiment of the present invention.
- switching control unit 102 executes a power source selection process (steps S502, S504, S508) immediately before driving the pump.
- step S502 it is determined whether or not the voltage of the dry battery 52 is greater than a predetermined threshold THp (for example, 4.5 V).
- the threshold value THp is a value sufficiently higher than the threshold value THo (operable voltage) at the time of activation, and represents a voltage value (+ predetermined value) necessary for driving the pump 33.
- step S502 When the voltage of the dry battery 52 is greater than the threshold value THp (YES in step S502), the switching control unit 102 selects the dry battery 52 (step S504). On the other hand, if the voltage of dry battery 52 is equal to or lower than threshold value THp (NO in step S502), switching control unit 102 selects rechargeable battery 51 (step S506).
- the measurement control unit 104 starts driving the pump 33 and gradually increases the pressure of the air bladder 21 (step S508).
- the measurement control unit 104 determines whether or not the pressurization end timing has come (step S510).
- the pressurization end timing may be a time point when the systolic blood pressure is estimated during pressurization by a known method.
- step S510 Pressurization is continued until the pressurization end timing is reached (NO in step S510).
- step S510 measurement control unit 104 stops driving of pump 33 (step S512).
- step S512 the process returns to the main routine.
- measurement control unit 104 starts depressurization (step S412).
- the switching control unit 102 executes power source selection processing (steps S414, S416, and S418) at the start of pressure reduction (immediately after the pump is stopped).
- steps S414, S416, and S418 may be the same as steps S402, S404, and S406 at the time of startup, respectively. Therefore, description here will not be repeated.
- the measurement control unit 104 calculates blood pressure (maximum blood pressure, minimum blood pressure) and pulse rate by a known method (step S420).
- the measurement control unit 104 displays the measurement result on the display unit 40 (step S422). Further, the measurement result is stored in a measurement result storage area (not shown) in the memory 39 (step S424).
- steps S420, S422, and S424 may be the same as steps S108, S110, and S112 of FIG. 5 in the first embodiment, respectively.
- FIG. 12 is a timing chart showing power supply switching timing in the second embodiment of the present invention. Also in this timing chart, an example in the dry battery priority mode is shown.
- the voltage VA of the rechargeable battery 51 is greater than the threshold value THp
- the voltage VB of the dry battery 52 is greater than the threshold value THo and less than or equal to the threshold value THp.
- the rechargeable battery 51 is selected as the power source.
- the battery 52 is charged from the dry battery 52 at the time point when the driving of the pump 33 is started (t3).
- the power source is switched to the battery 51 (step S506 in FIG. 11). Thereby, the remaining amount of the rechargeable battery 51 is consumed for driving the pump 33.
- the dry battery 52 can be selected as the power source in a phase other than the drive of the pump 33. .
- the remaining amount of the dry battery 52 can be used efficiently.
- the dry battery 52 can be used up.
- the dry battery priority mode has been described as an example, but also in the rechargeable battery priority mode, the life of the rechargeable battery 51 can be extended by using up the rechargeable battery 51 to the lower limit value.
- the power source selection process is not performed at the time (t1) when the dry battery 52 is inserted.
- the power source selection process may be performed even at the time.
- the power source selection process may be performed not only when the pump is stopped (t4) but also when the blood pressure calculation is completed (t5).
- Time t5 corresponds to the end of decompression.
- the power source selection process is performed only at a specific timing.
- the voltage values of both the batteries 51 and 52 are periodically monitored and periodically. Power supply selection processing may be performed. This makes it possible to use the battery even more efficiently.
- Embodiment 2 and Modifications 1 and 2 of Embodiment 1 may be combined.
- ⁇ Modification> In the said Embodiment 2, it fixed to the battery determined just before the pump drive during the pressurization period. However, the most power is consumed during the pressurization period when the driving of the pump 33 is started. Therefore, in order to fully use the priority battery (the battery determined to be used preferentially), it may be determined again whether or not the priority battery can be switched after a certain period of time has elapsed after the start of driving of the pump 33. .
- FIG. 13 is a flowchart showing pressurization control in a modification of the second embodiment of the present invention.
- the same step numbers are assigned to the same processes as those in the flowchart of FIG. 11 used in the second embodiment. Therefore, description thereof will not be repeated here.
- step S502A is executed instead of step S502 of FIG. Further, the processes of steps S602 to S608 are added between step S508 and step S510 of FIG.
- step S502A the switching control unit 102 determines whether or not the voltage of the dry battery 52 is greater than a predetermined threshold THpa (for example, 4.5 V).
- the threshold value THpa represents a voltage value (+ predetermined value) required at the initial driving of the pump 33.
- THpa may be lower than threshold THp in the second embodiment, but is sufficiently higher than threshold THo at the time of activation.
- the switching control unit 102 determines whether or not an elapsed time (that is, a pump driving time) after starting the driving of the pump 33 is less than a predetermined time Ta (Ste S602).
- the pump driving time may be calculated based on the output (current day, hour, minute, second) from the time measuring unit 43. Alternatively, it may be counted by a timer not shown.
- step S602 it is determined whether the voltage of the battery being used has recovered. Instead of determining the predetermined time Ta, it may be determined whether or not the voltage of the battery in use has returned to the threshold THpa at the initial driving stage.
- switching control unit 102 determines whether or not the voltage of dry battery 52 is greater than a threshold THpb (for example, 4.2 V) (step S604).
- the threshold value THpb represents a voltage value (+ predetermined value) necessary for continuing driving of the pump 33.
- the threshold value THpb is lower than the threshold value THpa in the initial stage of pressurization. Further, the threshold value THpb is a value equal to or higher than the threshold value THo at the time of activation.
- step S604 When it is determined that the voltage of the dry battery 52 is greater than the threshold value THpb (YES in step S604), the dry battery 52 is selected (step S606). On the other hand, when it is determined that the voltage of the dry battery 52 is equal to or lower than the threshold value THpb (NO in step S604), the rechargeable battery 51 is selected (step S608).
- step S510 When any battery is selected, it is determined in step S510 described above whether or not the pressurization end timing has come. If it is not the pressurization end timing (NO in step S510), the process returns to step S604. If the pressurization end timing is reached (YES in step S510), the pump 33 is stopped in step S512 described above.
- FIG. 14 is a timing chart showing the power supply switching timing in the modification of the second embodiment of the present invention. Also in this timing chart, an example in the dry battery priority mode is shown.
- the voltage VA of the rechargeable battery 51 is larger than the threshold THp (voltage that can drive the pump 33) used in the second embodiment. Further, it is assumed that the voltage VB of the dry battery 52 is greater than the threshold value THpb (continuable voltage) and equal to or less than the threshold value THpa (drive initial voltage) at the start of the timing chart.
- the states at times t11 to t13 are the same as those at times t1 to t3 in FIG.
- the states at times t16 and t17 are the same as those at times t4 and t5 in FIG. 12, respectively. Therefore, detailed description of the states at these timings will not be repeated.
- the rechargeable battery 51 is selected at the time when the drive of the pump 33 is started (t13) (step S506 in FIG. 13).
- the capacity (remaining amount) of the dry battery 52 is reduced during pressurization (time t15). That is, it is assumed that the voltage value VB of the dry battery 52 becomes equal to or less than the threshold value THpb. Then, the power source is switched again from the dry battery 52 to the rechargeable battery 51 (NO in step S604, S608).
- the rechargeable battery 51 is selected until the pump 33 is stopped.
- the power source selection process is performed again. It is assumed that the voltage VB of the dry battery 52 is equal to or lower than the threshold value THpb but is larger than the operable voltage THpo. In that case, the power source is switched again from the rechargeable battery 51 to the dry battery 52 which is the priority battery (YES in step S414 in FIG. 10, S416).
- the power source can be switched even during the pressurization period. Therefore, the priority battery can be used more preferentially.
- the power source selection process (switching control) is performed in association with the blood pressure measurement control.
- FIG. 15 is a flowchart showing alarm processing according to Embodiment 3 of the present invention.
- the processing shown in the flowchart of FIG. 15 is also stored in advance in the memory 39 as a program, and the function of alarm processing is realized by the CPU 100 reading and executing this program.
- the dry battery priority mode is assumed. Referring to FIG. 15, this process is executed when dry battery 52 is inserted.
- the present invention is not limited to this, and instead of / in addition to this, it may be executed when charging of the rechargeable battery 51 is completed, or when an instruction for power source switching control is input by the user.
- the switching control unit 102 determines whether or not the voltage of the dry battery 52 is greater than the threshold value THo (step S802).
- the switching control unit 102 selects the dry battery 52 (step S804).
- the switching control unit 102 selects the rechargeable battery 51 (step S806).
- the sphygmomanometer 1 is turned off (step S808).
- the switching control unit 102 determines whether or not the alarm time recorded in the memory 39 has arrived (step S810). Here, it is actually determined whether or not the current time obtained from the time measuring unit 43 is a predetermined time (for example, 10 seconds) before the alarm time.
- the power supply selection process is executed for the switching control unit 102.
- the switching control unit 102 determines whether or not the voltage of the dry battery 52 is greater than a threshold value THb (for example, 4.3 V) (step S812).
- the threshold value THb is a voltage (+ predetermined value) necessary for driving the buzzer 44, and is larger than the threshold value THo that is an operable voltage.
- the switching control unit 102 selects the dry battery 52 (step S814).
- the switching control unit 102 selects the rechargeable battery 51 (step S816).
- the alarm control unit 106 sounds (operates) the buzzer 44 when the alarm time recorded in the memory 39 arrives (step S818). As a result, the buzzer 44 generates an alarm sound.
- FIG. 16 is a timing chart showing power supply switching timing of alarm processing according to Embodiment 3 of the present invention. Also in this timing chart, an example in the dry battery priority mode is shown.
- the sphygmomanometer 1 is in a power OFF state from the insertion of the dry battery 52 until the alarm time (time t22).
- the voltage of the dry battery 52 is equal to or less than the voltage value THb that enables the buzzer 44 to operate, and at this time, the rechargeable battery 51 is selected again as a power source (in step S812 of FIG. 15). NO, S816).
- Embodiment 3 and Modifications 1 and 2 of Embodiment 1 may be combined.
- auxiliary battery the voltage value of the battery that is not the priority battery
- the voltage value of the auxiliary battery is below various threshold values.
- rapid charging of the rechargeable battery 51 by an AC adapter may be promoted.
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Abstract
Description
<外観および構成について>
(外観について)
はじめに図1および図2を参照して、本実施の形態における電子血圧計(以下「血圧計」と略す)1の外観について説明する。
図1を参照して、血圧計1は、本体部10と、被測定者のたとえば上腕に巻付けるためのカフ20と、本体部10とカフ20とを接続するためのエアチューブ24とを備える。
図1および図2を参照して、本体部10は、5面体であり、机などの台と接する設置面と、設置面と所定の角度をなす表面10Aと、設置面に対して垂直な面である2つの側面10B,10Cおよび背面10Dとを有している。
本体部10の左側面10Bには、上述のエアチューブ24が接続されている。
(ハードウェア構成について)
図3は、本発明の実施の形態1における血圧計1のハードウェア構成を示すブロック図である。
図4は、本発明の実施の形態1における血圧計1の機能ブロック図である。
なお、本実施の形態では、電圧検出部56,57は、電源部60の電源制御回路53内に含まれることとしたが、これらは、電源部60とは独立して設けられてもよい。
本実施の形態における血圧計1の動作について説明する。
なお、以下の説明において、はじめは、充電池51が切替部58において選択されているものと仮定する。また、乾電池52の残量は十分にあるものと仮定する。つまり、電圧検出部57から得られる乾電池52の電圧が、後述する閾値THm(たとえば4.5V)以上であると仮定する。
再び図5を参照して、起動時の電源選択処理が終わり、測定スイッチ41Bが押下されると、測定開始の指示が入力される(ステップS104)。
測定処理終了後も、電源選択処理(ステップS102)において選択された電池が継続して選択されるものとする。
本実施の形態における血圧計1は太陽電池50を備えているため、天気がくもりや雨の場合には、充電池51を充電したくてもできない場合がある。そこで、電池の電圧だけでなく、さらに、天気の予測結果に基づいて、電源の切替制御を行なってもよい。
図7を参照して、切替制御部102は、充電池51の残測定回数を算出し、表示部40に表示する(ステップS222)。残測定回数は、たとえば、充電池51の電圧と、電圧と測定回数との関係を予め定義したデータテーブル(メモリ39内に格納)とに基づいて、算出される。このように、本変形例における特徴値(残測定回数)は、電圧検出部56,57からの出力に基づいてCPU100によって演算される値である。
また、本変形例では、残測定回数を、電池の残量に関連する特徴値として用いたが、上記実施の形態1と同様に、電池の電圧を用いてもよい。
電池の残量と関連する特徴値は、実施の形態1では電圧、実施の形態1の変形例1では残測定回数に対応していたが、電圧レベルを表わしてもよい。
ステップS224Aにおいて、切替制御部102は、充電池51の電圧レベルがレベル2以上であるか否かを判断する。
上記実施の形態1およびその変形例1,2では、起動時に一度だけ電源の切替制御が実行されるものであった。これに対し、本実施の形態では、血圧の測定処理と関連するタイミングで、複数回、電源の切替制御が実行される。
そうすると、加圧制御が実行される(ステップS410)。加圧制御については、図11にサブルーチンを挙げて説明する。
図11を参照して、まず、切替制御部102が、ポンプ駆動直前の電源選択処理(ステップS502,S504,S508)を実行する。
加圧終了タイミングが到来すると(ステップS510においてYES)、測定制御部104は、ポンプ33の駆動を停止する(ステップS512)。この処理が終わると、処理はメインルーチンに戻される。
同時に、切替制御部102は、減圧開始時(ポンプ停止直後)の電源選択処理(ステップS414,S416,S418)を実行する。
図12は、本発明の実施の形態2における電源切替タイミングを示すタイミングチャートである。このタイミングチャートにおいても、乾電池優先モードである場合の例が示されている。
<変形例>
上記実施の形態2では、加圧期間中は、ポンプ駆動直前に判定された電池に固定された。しかし、加圧期間中、最も電力を消費するのは、ポンプ33の駆動開始時である。そのため、優先電池(優先的に使用するよう定められた電池)をより十分に使い切るためには、ポンプ33の駆動開始後、一定期間経過すると、優先電池に切り替えられるかを再び判定してもよい。
図13は、本発明の実施の形態2の変形例における加圧制御を示すフローチャートである。なお、図13において、実施の形態2で用いた図11のフローチャートと同様の処理については同じステップ番号を付してある。したがって、これらについての説明はここでは繰返さない。
ポンプ33の駆動が停止されると(時間t16)、再び、電源選択処理が行なわれる。乾電池52の電圧VBが、閾値THpb以下であるが、動作可能電圧THpoよりも大きいとする。その場合、再度、充電池51から、優先電池である乾電池52に電源が切替えられる(図10のステップS414にてYES,S416)。
上述の各実施の形態では、血圧の測定制御に関連して電源選択処理(切替制御)を行なった。
図15は、本発明の実施の形態3におけるアラーム処理を示すフローチャートである。図15のフローチャートに示す処理も、予めプログラムとしてメモリ39に格納されており、CPU100がこのプログラムを読み出して実行することにより、アラーム処理の機能が実現される。
図15を参照して、この処理は、乾電池52が挿入された場合に実行されるものとする。なお、限定的ではなく、これに代えて/加えて、充電池51の充電終了時、ユーザによる電源の切替制御の指示が入力された時などに実行されてもよい。
図16は、本発明の実施の形態3におけるアラーム処理の電源切替タイミングを示すタイミングチャートである。このタイミングチャートにおいても、乾電池優先モードである場合の例が示されている。
なお、実施の形態3と実施の形態1の変形例1,2とを組合わせてもよい。
Claims (10)
- 被測定者の血圧を測定するための電子血圧計(1)であって、
被測定者の所定の身体部位に巻き付けるためのカフ(20)と、
前記カフ内の圧力を検知するための圧力センサ(32)と、
前記圧力センサからの信号に基づいて、前記被測定者の血圧を測定するための制御を行なうための測定制御部(104)と、
一次電池(52)および二次電池(61)を含み、前記電子血圧計を動作させるための電力を蓄えるための電源部(60)と、
前記一次電池および前記二次電池それぞれの特徴値を検出するための特徴値検出部(56,57)とを備え、
前記特徴値は、前記一次電池および前記二次電池それぞれの残量に関連する値であり、
前記特徴値検出部による検出結果に基づいて、前記一次電池および前記二次電池の切替制御を行なうための切替制御部(102)をさらに備える、電子血圧計。 - 太陽光を受光し、受光した光エネルギーを電気エネルギーに変換するための太陽電池(50)をさらに備え、
前記二次電池は、前記太陽電池が発電した電気エネルギーを蓄える、請求の範囲第1項に記載の電子血圧計。 - 前記切替制御部は、前記圧力センサからの信号に基づいて天気を予測し、天気の予測結果に応じて、前記一次電池または前記二次電池を選択する、請求の範囲第2項に記載の電子血圧計。
- 前記切替制御部は、起動時に、前記二次電池の前記特徴値が第1の閾値以上である場合に、前記二次電池を選択し、前記二次電池の前記特徴値が前記第1の閾値未満である場合には、前記天気の予測結果に応じて、前記一次電池または前記二次電池を選択する、請求の範囲第3項に記載の電子血圧計。
- 前記切替制御部は、起動時に、前記一次電池および前記二次電池のうち優先的に使用することが定められた第1の電池の前記特徴値が第1の閾値より大きい場合に、前記第1の電池を選択し、前記第1の電池の前記特徴値が前記第1の閾値以下である場合には、前記一次電池および前記二次電池のうちの他方の電池である第2の電池を選択する、請求の範囲第1項に記載の電子血圧計。
- 前記電源部から供給される電力を駆動源として前記カフを加圧するための加圧部(33,36)をさらに備え、
前記切替制御部は、さらに、起動時に前記第1の電池が選択されている場合、前記加圧部による加圧前における前記第1の電池の前記特徴値が、前記第1の閾値よりも高い第2の閾値以下であると判定したときには、前記第2の電池に電源を切替える、請求の範囲第5項に記載の電子血圧計。 - 前記切替制御部は、さらに、加圧前に前記第2の電池が選択されている場合に、前記加圧部による加圧途中における前記第1の電池の電圧が、前記第2の閾値よりも低い第3の閾値以上であると判定したときには、再度、前記第2の電池から前記第1の電池に切替える、請求の範囲第6項に記載の電子血圧計。
- 前記切替制御部は、前記一次電池および前記二次電池のうち、ユーザにより予め指定された方の電池を優先的に選択する、請求の範囲第1項に記載の電子血圧計。
- ユーザにより指定された特定タイミングでアラーム音を発生するための発生部(44)をさらに備え、
前記切替制御部は、前記特定タイミングが到来したときに、さらに、前記特徴値検出部による検出結果に基づいて、前記一次電池および前記二次電池の切替制御を行なう、請求の範囲第1項に記載の電子血圧計。 - 前記特徴値は、電圧値、電圧値に基づく電圧レベル、および、電圧値により算出される測定可能回数のいずれかを表わす、請求の範囲第1項に記載の電子血圧計。
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DE112009003746.1T DE112009003746B4 (de) | 2008-12-17 | 2009-12-07 | Elektronisches Blutdruckmessgerät |
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CN200980151141.0A CN102256538B (zh) | 2008-12-17 | 2009-12-07 | 电子血压计 |
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- 2009-12-07 WO PCT/JP2009/070472 patent/WO2010071043A1/ja active Application Filing
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Also Published As
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DE112009003746B4 (de) | 2024-05-29 |
DE112009003746T5 (de) | 2013-03-14 |
RU2011129623A (ru) | 2013-01-27 |
RU2520156C2 (ru) | 2014-06-20 |
US9161702B2 (en) | 2015-10-20 |
CN102256538A (zh) | 2011-11-23 |
CN102256538B (zh) | 2014-12-17 |
US20110245696A1 (en) | 2011-10-06 |
JP5228880B2 (ja) | 2013-07-03 |
JP2010142371A (ja) | 2010-07-01 |
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