JP5883150B2 - Body moisture meter and display control method - Google Patents

Description

  The present invention relates to an in-vivo moisture meter that measures the amount of moisture in a living body of a subject and a control method thereof.

  It is important to measure the water content of a subject's living body. Dehydration in the living body is a pathological condition in which the water in the living body decreases, and is often expressed during exercise or when the temperature is high when a large amount of water is discharged from the body due to sweating or an increase in body temperature. In particular, in the case of an elderly person, the water retention ability of the living body itself is reduced, and thus dehydration is more likely to occur than in a normal healthy person.

  Usually, it is said that body temperature regulation is impaired when water in the living body is lost by 3% or more of body weight. When a body temperature regulation disorder occurs and the body temperature rises, it causes a further decrease in water in the living body, resulting in a vicious circle, and finally a pathological condition called heat stroke. Heat stroke has pathological conditions such as heat convulsions, heat fatigue, and heat stroke, and sometimes systemic organ damage may occur. For this reason, in order to avoid the risk of causing heat stroke, it is indispensable to accurately grasp the water content of the living body.

  As a so-called in-vivo moisture meter that grasps the moisture content of a living body, for example, a device that measures human body impedance with a device that holds a handle with both hands and calculates the moisture content in the body from the measurement result is known. (Patent Document 1). In addition, when dehydration occurs, the ability to sweat is reduced and the axilla, which is supposed to be a moist environment, is dried. In order to capture this phenomenon and easily detect invisible dehydration, the present applicant has proposed a moisture meter in the body that measures the amount of moisture in the body by pressing an electrode against the body surface in the axilla (patent) Reference 2). In this type of moisture meter, the amount of moisture in the stratum corneum of the axilla is detected, and the state where the axilla is dry is detected.

JP 11-318845 A JP 2012-090878 A

  By measuring the amount of water in the axilla, the in-vivo moisture meter described in Patent Document 2 is compared to the in-vivo moisture meter described in Patent Document 1 in which the subject himself is required to hold the handle with both hands. It is possible to easily measure the amount of water in the body. In particular, it has an excellent characteristic that a third party (measurer) other than the subject can easily measure the moisture content in the body of the subject. For this reason, it is possible to easily carry out checks of dehydration of children and infants in the care of elderly people.

  By the way, the moisture meter in the body that measures the amount of moisture in the body in the axilla can provide operability like a thermometer. However, with regard to the amount of water in the body, there is no standard that has become widely established like body temperature, and it is easy to measure the amount of water in the body, and even if you can know the value, how much is it dehydrated? It is difficult to intuitively determine whether it is dehydrated. Therefore, in order to be able to determine whether or not there is a tendency of dehydration or dehydration as easily as body temperature measurement, the measured amount of water in the body is compared with a threshold value to determine whether or not it is dehydrated. It is desirable to determine whether or not and notify the determination result.

  The amount of water on the skin surface decreases with age. For this reason, when the dry state of the child's axilla is compared with the dry state of the elderly's axilla, the amount of water is smaller when the axilla of the elderly is dry. Therefore, it is necessary to determine the degree of dehydration by measuring the amount of water after determining whether the subject is an elderly person or a child. Also, the axilla of the elderly is generally very deep, while the axilla of the child / infant is shallow. Therefore, for example, an in-vivo moisture meter having a shape suitable for measuring the amount of water in an axilla of an elderly person may be difficult to operate when measuring the amount of water in an axilla of a child.

  The present invention has been made in view of the above problems, and it is possible to provide an appropriate shape according to the age of the measurement subject and an appropriate reference for determining the dehydration state. The purpose is to provide.

In order to achieve the above object, the moisture meter in the body according to the present invention has the following configuration. That is,
An attachment unit having an electrode for measuring the amount of moisture, and a body unit having a calculation means for calculating the amount of moisture based on an electrical signal from the electrode, wherein the attachment unit and the body unit are detachable A body moisture meter,
A discriminating means for discriminating the type of attachment part mounted on the main body part;
Setting means for setting a reference value for determining the dehydration state based on the type determined by the determining means;
Determination means for determining the dehydration state based on the amount of water calculated by the calculation means and the reference value set by the setting means.

  According to the present invention, it is possible to provide an appropriate shape according to the age of the measurement subject and an appropriate reference for determining the dehydration state, and an easy-to-use in-vivo moisture meter can be provided.

  Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the accompanying drawings, the same or similar components are denoted by the same reference numerals.

The accompanying drawings are included in the specification, constitute a part thereof, show an embodiment of the present invention, and are used to explain the principle of the present invention together with the description.
It is a figure which shows the external appearance structural example of the moisture meter in a body concerning embodiment. It is a figure for demonstrating the usage condition of the moisture meter in a body by embodiment. It is a figure explaining the attachment or detachment structure of a main-body part and an attachment part. It is a figure which shows the function structure of the moisture meter in a body by embodiment. It is a figure for demonstrating the measuring circuit of the moisture meter in a body by embodiment. It is a flowchart explaining operation | movement of the moisture meter in a body by embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
<1. External structure of moisture meter in the body>
FIG. 1 is a diagram illustrating an example of an external configuration of a moisture meter 100 in the body according to the present embodiment. The moisture meter 100 in the body brings the sensor part 121 into contact with the skin of the axilla, which is the body surface of the subject, and detects the physical quantity according to the electrical signal supplied in the sensor part 121 to thereby determine the amount of moisture in the subject's body. Is detected. In the body moisture meter 100 according to the present embodiment, by measuring the subject's capacitance as the physical quantity (data related to moisture in the living body), the wetness of the skin of the axilla is detected, and the moisture content in the body is determined. calculate. The physical quantity detected for calculating the amount of water in the body is not limited to the capacitance, and may be, for example, impedance measured by supplying a constant voltage or a constant current to the subject.

  As shown in FIG. 1, the in-vivo moisture meter 100 includes a main body 110 and an attachment 120 that can be attached to and detached from the main body 110. The main body 110 has an upper surface 114, a lower surface 115, and side surfaces 116 and 117 that are formed substantially parallel to the major axis direction (not shown), respectively, and are formed in a straight line as a whole. Various user interfaces are arranged on the housing surface of the main body 110, and an electronic circuit for calculating the amount of moisture in the body is housed inside the housing.

  In the example of FIG. 1, a power switch 111 and a display unit 112 are shown as a user interface. The power switch 111 is disposed in a recess in the rear end surface 113 of the main body 110. By adopting a configuration in which the power switch 111 is disposed in the recess in this manner, an erroneous operation on the power switch 111 can be prevented. When the power switch 111 is turned on, power supply from the power supply unit 411 (FIG. 4), which will be described later, to each part of the moisture meter 100 in the body is started, and the moisture meter 100 in the body enters an operating state.

  The display unit 112 is preferably arranged on the side surface 117 of the main body unit 110 slightly forward in the long axis direction. This is because when the moisture content in the body of the subject is measured using the moisture meter 100 in the body, even if the measurer grips the grip region 118, the display unit 112 is completely held by the hand gripped by the measurer. This is so as not to be covered (so that the measurement result can be visually recognized even in a gripped state).

The display unit 112 displays a moisture content measurement result 131. In addition, a moisture amount mark 132 for indicating the degree of dehydration possibility and the severity is also displayed. In the present embodiment, the display state of the moisture amount mark 132 is changed as follows.
If the moisture content measurement result is equal to or greater than the first reference value, the moisture content mark 132a filled with water droplets is displayed as normal.
・ If the measurement result of the moisture content is less than the first reference value and greater than or equal to the second reference value (where the first reference value> the second reference value), the water content is somewhat insufficient and the tendency to dehydration Assuming that there is a water content mark 132b in a state in which half of the water drops are filled.
If the measurement result of the water content is less than the second reference value, the water content mark 132c in a state where the water droplet is empty is displayed because it is dehydrated and may be serious.

  In this embodiment, the attachment part 120 can be attached to and detached from the main body part 110. For example, the attachment part 120 can be replaced with a plurality of attachment parts according to age, such as an attachment part for elderly people and an attachment part for children. Is possible. Then, appropriate values are selected as the first reference value and the second reference value described above according to the type of attachment part to be attached (the age of the subject to which the attachment part corresponds).

  The battery display unit 133 displays the remaining amount of the battery (power supply unit 411 in FIG. 3). When an invalid measurement result is obtained or a measurement error is detected, “E” is displayed on the display unit 112 to notify the user to that effect. Note that characters and the like displayed on the display unit 112 are displayed with the upper surface 114 side of the main body unit 110 as the upper side and the lower surface 115 side as the lower side. The type marks 134 and 135 display the type of the attachment part to which the main body part 110 is attached. In the present embodiment, two types of attachment parts for elderly people and attachment parts for children can be attached, and the type mark 134 is used when the attachment part for elderly people is attached to the main body 110. Is displayed. The type mark 135 is displayed when a child attachment is attached to the main body 110.

  The attachment unit 120 of the moisture meter 100 in the body has an upper surface 124 and a lower surface 125 having curved surfaces, and is gently curved as a whole with respect to the main body 110. A sensor unit 121 is held on the distal end surface 122 of the attachment unit 120 so as to be slidable in the directions of the arrows 141a and 141b.

  The sensor unit 121 has a sensor head 123 having a surface substantially parallel to the distal end surface 122, and in order to ensure the pressure of the sensor head 123 to ensure close contact with the skin, a spring (not shown) It is biased in the direction of arrow 141a (for example, a biasing force of about 150 gf). When the sensor head 123 is pressed against the skin of the subject's axilla, the sensor unit 121 moves in a direction indicated by an arrow 141b (a direction substantially orthogonal to the tip surface 122, that is, a normal direction of the tip surface 122) ( For example, 1 mm to 10 mm (3 mm in this embodiment) is slid and measurement is started by this (hereinafter, the direction of the arrow 141b is referred to as a slide direction).

  Specifically, after the user turns on the power switch 111 to set the in-vivo moisture meter 100 in an operating state, the sensor head 123 has been pressed against the subject's axilla for a predetermined time or longer (for example, 2 seconds or longer). When detected, measurement of the amount of water in the body is started. In the present embodiment, after the user turns on the power switch 111 to set the moisture meter 100 in the operating state, the sensor head 123 is placed on the subject's axilla with a predetermined load (for example, 20 gf to 200 gf, more preferably 100 gf to 190 gf, In this embodiment, when it is detected that pressing is performed at 150 gf), measurement of the body water content is started. With such a mechanism, the degree of adhesion of the sensor head 123 to the axilla during measurement can be made constant.

  An electrode is laid on the contact surface of the sensor head 123 with the subject, and a protective material is provided so as to cover the electrode. Further, the contact surface of the sensor head 123 is not limited to a planar shape, and may be a convex curved surface shape. An example of the shape of such a contact surface is a part of a spherical surface (for example, a spherical surface having a radius of 15 mm).

<2. Usage example of moisture meter in the body>
Next, a usage example of the in-vivo moisture meter 100 having the characteristic external shape will be described. FIG. 2 is a diagram for explaining an example of use of the moisture meter 100 in the body. 2A in FIG. 2 schematically shows the upper left body of the person to be measured, and 2B in FIG. 2 schematically shows an aa cross section of 2A. It is shown. As shown in 2B of FIG. 2, the in-vivo moisture meter 100 is configured to measure the amount of moisture in the body of the subject in a state where the sensor unit 121 is pressed against the axilla between the left upper arm of the subject and the left chest wall. Measure.

  In pressing the sensor unit 121 against the armpit, the measurer grips the grip region 118 of the moisture meter 100 with the right hand so that the sensor unit 121 faces upward, and from the lower front side of the subject toward the armpit. The sensor unit 121 is inserted.

  As shown in FIG. 1, the attachment part 120 of the moisture meter 100 in the body is gently curved, and when inserted from the front lower side of the subject toward the axilla, the front side wall of the upper arm and the moisture meter in the body 100 does not interfere, and the right hand of the measurer can press the sensor unit 121 against the armpit at a substantially right angle without interfering with the upper arm of the subject.

  In addition, since the curved shape of the attachment unit 120 is formed so that the bending direction of the attachment unit 120 and the sliding direction of the sensor unit 121 coincide with each other, the measurer presses along the bending direction 205, The sensor unit 121 can be pressed to the armpit at a substantially right angle.

  Thus, according to the shape of the in-vivo moisture meter 100 according to the present embodiment, even a subject with a deep axilla, such as an elderly person, can easily perform measurement. In addition, as described above, the attachment unit 120 having the electrode (sensor unit 121) for measuring the moisture content, the measurement circuit 421 for calculating the moisture content from the electric signal obtained from the electrode, and the control unit 401 (see FIG. 4). It is detachable from the main body 110 having a later-described. For example, as shown in FIG. 3, an attachment part 120 a having a shape different from that of the attachment part 120 can be attached to the main body part 110 instead of the attachment part 120. The attachment part 120a is shorter than the attachment part 120, for example, and has a shape suitable for measuring the amount of water in the child's axilla. In addition, in this embodiment, although the attachment part 120 for elderly people and the attachment part 120a for children are shown as an exchangeable attachment part, the kind of attachment part which can be replaced is not limited to these. That is, a plurality of attachment units corresponding to a plurality of age groups may be provided. Further, in this embodiment, the names “for elderly” and “for children” are classified, but “for elderly” is an object to be measured, and “for children” is an object to be measured. ~ To be understood as an infant.

  With reference to FIG. 3, attachment of the attachment parts 120 and 120a and the main body part 110 will be described. When the attachment unit 120 is attached to the main body 110, the attachment unit 120 is provided on a panel (a panel forming the upper surface 114 and the lower surface 115) orthogonal to the panel (the panel forming the side surface 117) on which the display unit 112 is present. The convex portions 301 a and 303 a provided in the attachment portion 120 are fitted into the concave portions 301 and 303. Further, the pins 311 a and 312 a of the attachment part 120 are inserted into the electrode holes 311 and 312 of the main body part 110. The pins 311 a and 312 a are respectively connected to electrodes provided in the sensor head 123, and these are inserted into the electrode holes 311 and 312, whereby an electric signal from the electrodes is transmitted to the main body 110. The attachment part 120 being mounted is detected from the fact that the convex parts 301a and 303a are fitted in the concave parts 301 and 303, and the concave parts 302 and 304 are open (described later with reference to FIG. 4). ).

  On the other hand, when the attachment part 120a is attached to the main body part 110, the convex part 302a provided on the attachment part 120a is provided in the concave part 302, 304 provided on the panel in which the display part 112 of the main body part 110 is present and the panel opposite thereto. 304a is fitted. Further, the pins 311 a and 312 a of the attachment part 120 a are inserted into the electrode holes 311 and 312 of the main body part 110. Note that the attachment 120a being mounted is detected because the convex portions 302a and 304a are fitted in the concave portions 302 and 304, and the concave portions 301 and 303 are in an open state (see FIG. 4). Will be described later).

  In addition, in the attachment part 120 for elderly people, since the shape of the axilla of the elderly person is greatly depressed, the angle formed by the longitudinal direction of the main body part 110 and the sliding direction of the sensor part 121 is about 20 degrees to 40 degrees. It is trying to become. Further, the attachment unit 120 is assumed to be thinner toward the tip on which the sensor unit 121 is mounted. On the other hand, in the attachment part 120a for children, since the child has a lot of meat in the axilla and the depth of the axilla is also short, the distance from the mounting part to the tip part is made shorter than the attachment part 120. In addition, in the attachment part 120a, the angle formed by the longitudinal direction of the main body part 110 and the sliding direction of the sensor part 121 is set to 0 degrees to 30 degrees. Moreover, in the case of the attachment part 120a, it is preferable that the front-end | tip in which the sensor part 121 is mounted shall be a roundish shape. Further, as shown in the figure, the mounting state of the attachment part 120 to the main body part 110 is uniquely determined by shifting the positions of the concave parts 301 to 304 and the positions of the convex parts 301a to 304a from the center. ing. Needless to say, other modes may be used to uniquely determine the mounting state, for example, the shape of the mounting portion may be a trapezoid.

<3. Functional configuration of body moisture meter>
FIG. 4 is a block diagram illustrating a functional configuration example of the moisture meter 100 in the body according to the present embodiment. In FIG. 4, the control unit 401 has a CPU 402 and a memory 403, and executes various controls in the moisture meter 100 in the body by the CPU 402 executing a program stored in the memory 403.

  For example, the CPU 402 executes display control of the display unit 112, which will be described later with reference to the flowchart of FIG. 6, drive control of the buzzer 422 and the vibrator 423, measurement of the amount of moisture in the body (capacitance measurement in this embodiment), and the like. The memory 403 includes a nonvolatile memory and a volatile memory. The nonvolatile memory is used as a program memory, and the volatile memory is used as a working memory for the CPU 402.

  The power supply unit 411 has a replaceable battery or a rechargeable battery, and supplies power to each part of the moisture meter 100 in the body. The voltage regulator 412 supplies a constant voltage (for example, 2.3 V) to the control unit 401 and the like. The remaining battery level detection unit 413 detects the remaining battery level based on the voltage value supplied from the power source unit 411 and notifies the control unit 401 of the detection result. The control unit 401 controls the display of the battery display unit 133 on the display unit 112 based on the remaining battery level detection signal from the remaining battery level detection unit 413.

  When the power switch 111 is pressed, power supply from the power supply unit 411 to each unit is started. And if the control part 401 detects that pressing by the user of the power switch 111 continued for 1 second or more, it will make the moisture meter 100 in a body into a power-on state. That is, the control unit 401 maintains power supply to each unit from the power supply unit 411, and puts the moisture meter 100 in the body into an operating state. As described above, the measurement switch 414 is turned on when the sensor unit 121 is pushed a predetermined amount or more in the direction of the arrow 141b. When the control unit 401 detects that the ON state of the measurement switch 414 has continued for a predetermined time (for example, 2 seconds), the control unit 401 starts measuring the moisture content. In order to prevent exhaustion of the power supply unit 411, if the measurement does not start even after 5 minutes have passed since the in-vivo moisture meter 100 is in the operating state, the control unit 401 automatically turns on the in-vivo moisture meter 100. Transition to the off state.

  The measurement circuit 421 is connected to the sensor head 123 included in the attachment unit 120 via the electrode holes 311 and 312 and the pins 311a and 312a, and measures the capacitance. FIG. 5 is a diagram illustrating a configuration example of the measurement circuit 421. The operational amplifiers 501 and 502, the resistors 503 and 504, and the subject capacitor 510 form a CR oscillation circuit. Since the oscillation frequency of the output signal 505 changes depending on the subject volume 510, the control unit 401 calculates the subject volume 510 by measuring the frequency of the output signal 505. The control unit 401 further converts the subject volume 510 into the amount of moisture in the body and displays it as the measurement result 131 on the display unit 112. In the sensor head 123 of the present embodiment, for example, two comb-shaped electrodes are arranged so that the respective comb teeth are alternately arranged, but the present invention is not limited to this.

  Returning to FIG. The projections 301a to 304a of the attachment parts 120 and 120a and the recesses 301 to 304 of the main body part 110 are provided with electrodes so as to come into contact with each other in the fitted state. In the main body 110, the electrodes provided in the recesses 303 and 304 are connected to the ground level. The type discriminating unit 450 determines the type of the attached attachment unit 120 or 120a based on an electrical signal obtained through the electrodes provided in the recesses 301 and 302. For example, in the attachment part 120, the electrodes provided in the convex parts 301a and 303a are short-circuited, and in the attachment part 120a, the electrodes provided in the convex parts 302a and 304a are short-circuited.

  Therefore, when the attachment part 120 is attached, as shown in FIG. 4, the electrodes provided in the concave part 301 of the main body part 110 are at the ground level via the electrodes provided in the convex parts 301a and 303a. The type discriminating unit 450 identifies the attachment unit 120 for elderly people by detecting that the electrode of the recess 301 is at the ground level and the electrode of the recess 302 is in a floating state. Similarly, when the attachment unit 120a is attached, the type determination unit 450 detects that the electrode of the recess 302 is at the ground level and the electrode of the recess 301 is in a floating state, and thereby the attachment unit 120a. It is determined that is attached.

  As described above, the type discriminating unit 450 discriminates the type of the attached attachment unit by checking which concave electrode is at the ground level. In this embodiment, for example, the protrusions 302a and 304a are not present in the attachment part 120. However, if the short circuit state between the electrodes is as described above, the protrusions 301a and 303a may be present. It doesn't matter. Needless to say, the method for determining the type of attachment portion is not limited to this. For example, a mechanical switch that is turned on by inserting the convex portions 301a to 304a may be provided in the concave portions 301 to 304, and the type of the attachment portion may be determined based on the state of these switches.

  The display unit 112 performs display as described in FIG. 1 under the control of the control unit 401. The buzzer 422 rings when the measurement starts when the sensor unit 121 is pressed or when the moisture content in the body is completed, and notifies the user of the start or completion of the measurement. The vibrator 423 also performs the same notification as the buzzer 422. That is, the vibrator 423 is driven when measurement by pressing the sensor unit 121 or measurement of the moisture content in the body is completed, and notifies the user of the measurement start or completion. The timer unit 424 operates by receiving power supply from the power source unit 411 even when the power is off, and notifies the control unit 401 of the time in the operating state.

<4. Operation of body moisture meter>
The operation of the in-vivo moisture meter 100 according to the present embodiment having the above-described configuration will be described with reference to the flowchart of FIG. The process shown in FIG. 6 is started when the main body 110 is turned on by pressing the power switch 111.

  First, in step S <b> 601, the control unit 401 uses the type determination unit 450 to determine the type of attachment unit attached to the main body unit 110. In the present embodiment, one of the above-described elderly attachment unit 120 and child attachment unit 120a is determined. In addition, when the attachment part is not mounted | worn, the buzzer 422 rings with a predetermined pattern, for example, and the notification to that effect is given.

Subsequently, the control unit 401 sets a reference value for determining the dehydration state based on the type of the attachment unit being mounted determined in step S601. That is, the reference value is set according to the age group to which the attached attachment unit corresponds among the plurality of attachment units provided according to the plurality of age groups. In the present embodiment, attachment units for elderly people and children are provided. If it is determined that the attached attachment unit is for elderly people, the process proceeds to step S602. In step S602, the control unit 401 displays a type mark 134 indicating that the attachment unit is for the elderly, and uses the reference values for the elderly as the first and second reference values for determining the dehydration state. Set. On the other hand, when it is determined that the attached attachment part is for children, the control unit 401 displays a type mark 135 indicating that the attachment part is for children in step S603, and displays a dehydration state determination. First, a reference value for children is set as the second reference value. An example of the reference value for the elderly and the reference value for the child is shown in Table 1 below.
[Table 1]
For seniors For children First standard value 35% 40%
Second reference value 25% 28%

  In step S604, the control unit 401 waits to detect an instruction to start measurement. In the present embodiment, the state of the measurement switch 414 is monitored, and it is determined that the measurement start instruction has been detected when the measurement switch 414 remains on for 2 seconds or longer. Note that the user may be notified of the start of measurement by driving the buzzer 422 and / or the vibrator 423 with a predetermined pattern for a predetermined period in response to detection of an instruction to start measurement. Further, while waiting for an instruction to start measurement, processing for determining the type of attached attachment unit may be executed at a predetermined interval.

  In step S604, when an instruction to start measurement is detected, the control unit 401 starts measuring the body water content. First, in step S605, the control unit 401 measures the oscillation frequency of the output signal 505 from the measurement circuit 421. In step S606, the control unit 401 calculates the moisture content in the body of the subject based on the oscillation frequency of the output signal 505 measured in step S605. In the following steps S607 to S611, a process of determining a dehydration state based on the reference value set in step S602 or S603 and the body water content calculated in step S606 and notifying the user of the determination result. Done.

  First, in step S607 and step S608, the control unit 401 compares the first and second reference values set in step S603 or S604 with the body water content calculated in step S606. If the moisture content in the body is equal to or greater than the first reference value, the process proceeds to step S609, and the control unit 401 selects a moisture content mark 132a indicating that the normal value is free of fear of dehydration. If the moisture content in the body is less than the first reference value and greater than or equal to the second reference value, the process proceeds to step S610, and the control unit 401 selects the moisture content mark 132b indicating that there is a possibility of dehydration. Furthermore, when the moisture content in the body is less than the second reference value, the process proceeds to step S611, and the control unit 401 selects the moisture content mark 132c indicating that the dehydration state is proceeding.

Therefore, when the attachment part 120 for elderly people is mounted | worn, a dehydration state is determined as follows and the moisture amount mark 132 is displayed.
-Body water content ≥ 35%: Display water content mark 132a (normal)
・ 35%> body water content ≧ 25%: display water content mark 132b (prone to dehydration)
・ 25%> body water content: display water content mark 132c (dehydrated)

  In the present embodiment, the display form is changed according to the first reference value and the second reference value, but the present invention is not limited to this. For example, the display form may be changed by judging whether the dehydrated state is normalized only with the first reference value, or the display form may be changed sequentially with three or more reference values. good.

  Next, in step S612, the control unit 401 displays the moisture content in the body calculated by the current measurement on the display unit 112 as the measurement result 131. At this time, the control unit 401 displays the moisture amount mark 132 selected in any of the above steps S609 to S6011 on the display unit 112. The user knows the measured value of the moisture content in the body, and can easily determine the dehydration state or the non-dehydration state by the display of the moisture amount mark 132 and its severity. In particular, since the reference value for dehydration determination is appropriately selected depending on whether the attachment unit is for elderly people or children, it becomes possible to notify the dehydration state more accurately according to the subject. . Moreover, since attachments having different shapes according to the respective subjects can be used for the elderly and children, the ease of measurement of the water content in the body is also improved.

<5. About modification>
In the above embodiment, the reference value for the elderly and the reference value for the child are set according to the determination result of the type of the attached attachment part, and these reference values are always used. Instead, the reference value may be changed by the user. For example, it may be possible to change to a reference value corresponding to an attachment part different from the attachment part currently mounted by a user operation. If it does in this way, the usage method of using the reference value for children in the state where attachment part 120 for elderly people was equipped can be performed. This is because, for example, the control unit 401 recognizes that the power switch 111 is pressed long (more than 2 seconds) as a power-off operation, and the power switch 111 is pressed for less than 1 second (hereinafter, short press) to switch the reference value. This can be realized by recognizing it as an operation. For example, when a short press of the power switch 111 is detected while waiting for the start of measurement in step S604, the reference value is switched. For example, when the attachment unit 120 is attached and the type mark 134 is displayed, when the power switch 111 is pressed for a short time, the display is switched to the type mark 135 and a reference value for children is set. Thereafter, when the power switch 111 is pressed again for a short time, the display is switched to the type mark 134 and the setting is returned to the reference value for the elderly. By repeating the above operation every time the power switch 111 is pressed shortly, it is possible to set a reference value different from the age group to which the attached attachment portion corresponds.

  In the above-described embodiment, the reference value is changed according to the type of the attached attachment unit. However, the notification form of the completion of measurement or the dehydration state may be changed according to the type of the attachment unit. For example, the buzzer 422 is used for notification of completion of measurement or dehydration when the attachment part 120 for elderly people is attached, and when the attachment part 120a for children is attached, the vibrator is used. 423 is used. In this way, if the person to be measured is an elderly person, a buzzer sound with a relatively large volume can notify the completion of measurement or an alarm of dehydration, and even the elderly can easily recognize the completion of measurement. . On the other hand, when the measurement subject is a child, the measurement completion is notified only by driving the vibrator 423, so that a situation in which the measurement subject sleeping with a loud buzzer sound is awakened can be avoided. .

In addition, when the attachment parts 120 and 120a are replaced, if the electrical characteristics of the electrodes included in the respective attachment parts change, calibration of moisture amount calculation is performed according to the type of attached attachment part. You may do it. For example, the method for calculating the amount of water is
The output signal 505 (subject's capacitance) when measured in the air using the moisture meter 100 in the body is S1, and the output signal 505 (subject's capacitance) when measured in water is S2. In this case, 0% body water content is assigned to S1, and 100% body water content is assigned to S2.
-The output signal of the moisture meter 100 in the body between S1 and S2 and the moisture content in the body (0 to 100%) are assigned linearly, and the measurement result of the moisture content in the body is converted by converting the output signal from the sensor into the moisture content in the body obtain,
In this case, if S1 and S2 are different for each attached attachment part, an error occurs, and the body water content cannot be calculated correctly.

  Therefore, it is necessary to calibrate such an error. For example, it is conceivable that the control unit 401 holds a calibration value used for such calibration for each type of attachment unit, and the control unit 401 calculates the moisture content using this calibration value. Alternatively, the calibration value may be provided from the attachment unit 120. In this case, a ROM that stores calibration values in the attachment unit 120 may be built in and a calibration value may be provided to the main body unit 110. Alternatively, the calibration value may be divided into 256 stages, for example, and the calibration level may be indicated by an 8-bit jumper pin provided in the attachment unit. If a calibration value can be provided from the attachment unit to the main body unit 110, even if there is a variation in the electrical characteristics of the electrodes for each attachment unit, a plurality of arbitrary attachment units 120 for one main body unit 110 is provided. Can be provided separately.

  Note that the type of attachment unit may be provided from a ROM provided in the attachment unit, or a jumper pin having an appropriate number of bits may be used. Discrimination of the type of attachment part in the above embodiment is an example of discrimination similar to the use of jumper pins. Further, if only the electrode of the recess 304 is connected to the ground level, and any electrode among the electrodes of the remaining recesses 301 to 303 is connected to the electrode of the recess 304, the type is represented. The type can be expressed with 3 bits.

  Although the case where there are two types of attachment units has been described, it is needless to say that the present invention can be applied to a configuration in which three or more types of reference values are switched by three or more types of attachment units. For example, it is divided into a plurality of age groups such as 0 to 10 years old, 11 to 20 years old, 21 to 60 years old, 61 years old and over, and a plurality of attachment units corresponding to each age group are prepared. In the processing of steps S601 to S603, the control unit 401 of the main body 110 operates to determine a corresponding age group from the type of attached attachment, and to set a reference value corresponding to the determined age group To do. Thus, the structure which can mount | wear with three or more types of attachment parts is realizable.

  As is apparent from the above description, according to the moisture meter 100 in the body according to the present embodiment, the user can determine whether or not the dehydration state is present according to the display form of the moisture amount mark 132 and the severity of the body temperature measurement. Can be easily determined. In addition, an easy-to-use attachment unit can be used according to the age group (children or elderly people) of the subject, and the dehydration state is appropriately indicated according to the age of the subject, so that ease of use is improved. Improve and make appropriate decisions.

  In the above embodiment, the display form is changed by changing the water drop mark when the measurement result is lower than the first reference value or lower than the second reference value. However, the present invention is not limited to this. Needless to say. For example, the display form may be changed so that the user can be alerted by notifying the user that the reference value has fallen below the reference value, such as changing the display color.

The present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, in order to make the scope of the present invention public, the following claims are attached.

Claims (6)

An attachment unit having an electrode for measuring the amount of moisture, and a body unit having a calculation means for calculating the amount of moisture based on an electrical signal from the electrode, wherein the attachment unit and the body unit are detachable A body moisture meter,
A discriminating means for discriminating the type of attachment part mounted on the main body part;
Setting means for setting a reference value for determining the dehydration state based on the type determined by the determining means;
An in-vivo moisture meter comprising: determination means for determining a dehydration state based on a moisture amount calculated by the calculation means and a reference value set by the setting means. The main body part can be equipped with each of a plurality of attachment parts according to the age group of the person being measured,
The in-vivo moisture meter according to claim 1, wherein the setting means sets a reference value according to an age group corresponding to the type of the attached attachment part determined by the determination means.   The in-vivo moisture meter according to claim 1 or 2, further comprising display means for performing display for notifying a user of the type determined by the determination means.   4. The apparatus according to claim 1, further comprising first changing means for changing the reference value set by the setting means to a reference value corresponding to another type of attachment unit in response to a predetermined user operation. The moisture meter in a body of any one of these.   Second change means for changing at least one of a notification form for notifying the user of the completion of the measurement of the moisture amount and a notification form for notifying the user of the dehydration state according to the type determined by the determination means The moisture meter in a body according to any one of claims 1 to 4, further comprising: An attachment unit having an electrode for measuring the amount of moisture, and a body unit having a calculation means for calculating the amount of moisture based on an electrical signal from the electrode, wherein the attachment unit and the body unit are detachable A control method for a body moisture meter,
A determination step of determining the type of attachment part mounted on the main body part,
Setting means for setting a reference value for determining a dehydration state based on the type of the attachment part determined in the determination step;
A body moisture meter control method comprising: a determination unit that determines a dehydration state based on a moisture amount calculated by the calculation unit and a reference value set by the setting unit.

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