Measurement device, measurement system, and power supply method for measurement device

Abstract

The invention provides a measurement device, a measurement system, and a measurement method of the measurement device. This measurement device is provided with: a measurement meter that measures a fluid; a measurement device includes a measurement meter, and a main body to which the measurement meter is attached and detached, the measurement meter including a plurality of measurement terminals, the main body including a plurality of main body terminals, the plurality of main body terminals being attached to the main body by the measurement meter and being in contact with the plurality of measurement terminals, the measurement device including: a power supply unit that supplies power to the plurality of main body terminals; a detection unit that detects the attachment of the measurement meter to the main body; and a switching unit that switches the power supply unit and at least one of the plurality of main body terminals from an electrically cut-off state to a connected state when the detection unit detects that the power supply unit is attached to the plurality of main body terminals.

Description

Technical Field

[0001] The present invention relates to a measuring device, a measuring system, and a power supply method for the measuring device. Background Art

[0002] Conventionally, for example, a measuring device includes: a measuring meter that measures a fluid; a main body to which the measuring meter is attached and detached; and a power supply unit that supplies power to the measuring meter (for example, Patent Document 1). In the measuring device of Patent Document 1, the power of the power supply unit is directly supplied to the measuring meter without passing through the main body. However, there is a desire to supply the power of the power supply unit to the measuring meter via the main body.

[0003] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2010-60395 Summary of the invention

[0004] Technical issues Therefore, the present invention aims to provide a measuring device, a measuring system, and a method for supplying power to the measuring device, which are capable of supplying power from a power supply unit to a measuring instrument via a main body.

[0005] Technical Solution The measuring device has: a meter that measures a fluid; and A main body for loading and unloading the measuring meter, The measuring instrument includes a plurality of measuring terminals. The main body includes a plurality of main body terminals, and the plurality of main body terminals are in contact with the plurality of measurement terminals when the measurement meter is mounted on the main body. The measuring device comprises: a power supply unit for supplying power to the plurality of main body terminals; a detection unit that detects attachment of the measuring meter to the main body; and A switching unit switches the power supply unit and at least one of the plurality of main body terminals from an electrically disconnected state to a connected state when the detection unit detects the attachment.

[0006] The measurement system has: The measuring device; and A communication device capable of communicating with the measuring device.

[0007] A method for supplying power to a measuring device is a method for supplying power to a measuring device including a measuring meter for measuring a fluid and a main body to which the measuring meter is attached and detached. The measuring instrument includes a plurality of measuring terminals. The main body includes a plurality of main body terminals, and the plurality of main body terminals are in contact with the plurality of measurement terminals when the measurement meter is mounted on the main body. The measuring device comprises: a power supply unit for supplying power to the plurality of main body terminals; a detection unit that detects attachment of the measuring meter to the main body; and a switching unit that switches the power supply unit and at least one of the plurality of main body terminals from an electrically disconnected state to a connected state when the detection unit detects the installation, The power supply method includes mounting the measuring meter on the main body in such a manner that the plurality of measuring terminals are in contact with the plurality of main body terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of a measurement system according to one embodiment.

[0009] Figure 2 This is a schematic diagram of the measuring device of this embodiment.

[0010] Figure 3 This is a perspective view of the main parts of the measuring device of this embodiment, and shows a state in which the measuring instrument is removed from the main body.

[0011] Figure 4 This is a perspective view of the main parts of the measuring instrument according to this embodiment as seen from below.

[0012] Figure 5 It is a perspective view of the main body of this embodiment.

[0013] Figure 6 It is a side view showing a partial cross section of the measuring device according to this embodiment, and is a view showing a state in which the measuring instrument is detached from the main body.

[0014] Figure 7 It is a side view showing a partial cross section of the measuring device according to this embodiment, and is a view showing a state where the measuring instrument is attached to the main body.

[0015] Figure 8 is a circuit diagram of a measuring device according to this embodiment.

[0016] Fig. 9 yes Figure 5 A magnified view of region IX.

[0017] Explanation of symbols 1…Measurement system, 2…Measurement device, 2a…Inflow portion, 2b…Outflow portion, 2c…Flow path, 3…Communication device, 4…Measurement meter, 4a…Measurement connection portion, 4b…First measurement engagement portion, 4c…Second measurement engagement portion, 5…Main body, 5a…Common portion, 5b…Main body connection portion, 5c…First main body engagement portion, 5d…Second main body engagement portion, 6…Power supply portion (DC power supply), 6d…First polarity portion, 6e…Second polarity portion, 7…Processing portion, 8… Cable, 9...Measurement terminal portion, 10...Main body terminal portion, 11...Measurement terminal, 11a...First measurement detection terminal, 11b, 11c, 11d...First measurement switching terminal, 11e...Second measurement detection terminal, 11f, 11g...Second measurement switching terminal, 12...Main body terminal, 12a...First main body detection terminal (first main body terminal), 12b, 12c, 12d...First main body switching terminal (first main body terminal), 12e...Second main body detection terminal (second main body terminal), 12f, 12g...Second main body switching terminal (second main body terminal), 13...Terminal movable portion, 14...Terminal fixing portion, 15...Detection portion, 15a...Detection circuit portion, 15b...Current detection portion, 16...Switching portion, 41...Measurement insertion portion, 41a...First measurement protrusion, 41b...Second measurement protrusion, 41c...Stopped portion, 42...Measurement circuit portion, 42a...Power supply circuit portion, 42b...Control circuit portion, 50 …main body, 51…main body recess, 51a…first clamping part, 51b…second clamping part, 51c…first main body protrusion, 52…base, 52a…first through hole, 52b…second through hole, 52c…third through hole, 53…sealing part, 54…stopper, 55…stopper force applying part, 56…operating part, 57…first holding part, 58…second holding part, D1…first lateral direction, D2…second lateral direction, D3…up and down direction, X1…communication unit DETAILED DESCRIPTION

[0018] In the drawings, for example, the actual size of the components may be enlarged or reduced for easy understanding, and the size ratios between the drawings may be inconsistent. It should be noted that in the drawings, for example, a part of the components may be omitted for easy understanding.

[0019] Although terms including ordinal numbers such as first and second are used to describe various structural elements, such terms are only used to distinguish one structural element from other structural elements, and the structural elements are not particularly limited by the terms. It should be noted that the number of structural elements including ordinal numbers is not particularly limited, for example, it may sometimes be one. In addition, the ordinal numbers used in the following description and drawings are sometimes different from the ordinal numbers recorded in the claims.

[0020] In the following, an embodiment of a measuring system and a measuring device is described with reference to Figures 1 to 9 It should be noted that the following embodiments are provided as examples to help understanding of the configurations of the measurement system and the measurement device, and do not limit the configurations of the measurement system and the measurement device.

[0021] like Figure 1 As shown, the measuring system 1 may include, for example, a measuring device 2 for measuring a fluid and a communication device 3 capable of communicating with the measuring device 2 using a communication unit X1. The fluid is not particularly limited, and includes, for example, not only liquids but also mixtures of liquids and gases, mixtures of liquids and solids, and the like.

[0022] In the drawings, the first direction D1 is the first lateral direction D1 , the second direction D2 is the second lateral direction D2 which is the lateral direction orthogonal to the first lateral direction D1 , and the third direction D3 is the up-down direction D3 orthogonal to the lateral directions D1 and D2 .

[0023] Although not particularly limited, for example, as shown in this embodiment, the communication device 3 may be a mobile terminal (for example, a smart device, a tablet computer, a notebook personal computer, etc.). In addition, the communication unit X1 may be a wireless communication unit such as Wi-Fi and a wireless LAN, and may be a wired communication unit such as a communication cable and a wired LAN.

[0024] like Figure 1 to Figure 3 As shown, the measuring device 2 may include, for example: a plurality of (three in this embodiment) measuring meters 4 for measuring fluids, and a main body 5 for attaching and detaching the respective measuring meters 4. It should be noted that the number of the measuring meters 4 is not particularly limited, and may be, for example, one, two, or four or more.

[0025] The measuring meter 4 is not particularly limited as long as it is an instrument that measures a value related to the fluid (for example, a characteristic value, a state value, etc.). For example, when the measuring meter 4 is a water quality meter that measures a value related to water, the measuring meter 4 may be, for example, a turbidity meter, a colorimeter, a pH meter, a residual chlorine concentration meter, a conductivity meter, a flow meter, a water temperature meter, etc. It should be noted that a plurality of measuring meters 4 may measure different values ​​related to the fluid.

[0026] As in the present embodiment, the main body 5 may include, for example, a plurality of main body parts 50 to which the measuring meter 4 is attached and detached, and a common part 5a. In addition, as in the present embodiment, for example, a plurality of main body parts 50 may be attached and detached to each other, and a common part 5a may be attached and detached to the main body part 50. It should be noted that the structure of the main body 5 is not limited to such a structure, and for example, the common part 5a and the plurality of main body parts 50 may be integrally configured in an inseparable manner.

[0027] As in the present embodiment, the measuring device 2 may include, for example, an inflow portion 2a for fluid to flow in, an outflow portion 2b for fluid to flow out, and a flow path 2c for fluid to flow from the inflow portion 2a to the outflow portion 2b. As in the present embodiment, for example, the measuring meter 4 may be mounted on the main body 5, and the flow path of the measuring meter 4 and the flow path of the main body 5 may be connected to each other to form the flow path 2c.

[0028] As in the present embodiment, the common portion 5a may include, for example, a power supply unit 6 for supplying power (power supply), a processing unit 7 for processing data (for example, a computer including a processor and a memory), and a communication unit (not shown) for communicating with the communication device 3. Furthermore, as in the present embodiment, the power supply unit 6 may supply power to each main body unit 50 via, for example, a cable 8 or the like.

[0029] like Figure 3 to Figure 5 As shown, for example, the main body 50 may include a main body recess 51 opened at the top, and the measuring meter 4 may include a measuring insertion portion 41 at the lower end thereof to be inserted into the main body recess 51. Thus, the measuring meter 4 is attached to the main body 50 by inserting the measuring insertion portion 41 into the main body recess 51.

[0030] Furthermore, as in the present embodiment, for example, the measurement insertion portion 41 may include a tubular measurement connection portion 4a extending in the vertical direction D3, and the main body recess 51 may include a recessed main body connection portion 5b inserted into the measurement connection portion 4a. Thus, by attaching the measurement meter 4 to the main body 50, the measurement connection portion 4a is connected to the main body connection portion 5b, and thus the flow path of the measurement meter 4 is connected to the flow path of the main body 5 (see Figure 2 ).

[0031] In addition, as in the present embodiment, for example, the main body 50 may include a stopper 54 that stops the measuring insertion portion 41 from above, and the measuring insertion portion 41 may include a concave stopped portion 41c that stops against the stopper 54 (see Figure 6 as well as Figure 7 Thus, the stopped portion 41c is stopped by the stopper 54, so that the measurement insertion portion 41 is positioned in the main body recess 51 in the up-down direction D3.

[0032] As in the present embodiment, the stopper 54 can be connected to the main body recess 51 in a rotatable manner, for example. Thus, the stopper 54 is rotatably displaced between a stop position where the stopped portion 41c of the measuring insertion portion 41 is pressed from above and a release position where the pressing is released. It should be noted that, as in the present embodiment, the main body 50 can also include a stopper force applying portion 55, for example, which applies an elastic restoring force to the stopper 54 in such a manner that the stopper 54 is located at the stopper position. Although not particularly limited, the stopper force applying portion 55 can be, for example, a spring.

[0033] As in the present embodiment, the main body recess 51 may include, for example, a pair of first clamping portions 51a, 51a that clamp the measurement insertion portion 41 in the first lateral direction D1, and a pair of second clamping portions 51b, 51b that clamp the measurement insertion portion 41 in the second lateral direction D2. Thus, the measurement insertion portion 41 is positioned in the main body recess 51 in the lateral directions D1, D2.

[0034] In addition, as in the present embodiment, for example, the main body recess 51 may include an operating portion 56 for operation, and the operating portion 56 may constitute a first clamping portion 51a. As in the present embodiment, for example, the operating portion 56 may be operated so as to be in a clamping position (see Figure 3 , Figure 5 as well as Figure 7 ) and the retracted position separated from the measurement insertion portion 41 (see Figure 6 ) to perform transposition between such structures.

[0035] As in the present embodiment, the measuring insertion portion 41 may include, for example, a first measuring protrusion 41a protruding in the first lateral direction D1 and a second measuring protrusion 41b protruding in the second lateral direction D2. Also, as in the present embodiment, the main body recess 51 may include, for example, a first main body protrusion 51c protruding from the first clamping portion 51a in the first lateral direction D1.

[0036] In addition, as in the present embodiment, the measuring meter 4 and the main body 50 may include, for example, a first engaging portion and a second engaging portion 4b, 4c, 5c, 5d that engage with each other. As in the present embodiment, for example, the first measuring engaging portion 4b may be formed in a convex shape, and the first main body engaging portion 5c may be formed in a concave shape so as to be inserted into the first measuring engaging portion 4b, and the second main body engaging portion 5d may be formed in a convex shape, and the second measuring engaging portion 4c may be formed in a concave shape so as to be inserted into the second main body engaging portion 5d.

[0037] In addition, as in the present embodiment, for example, the measuring meter 4 may include the measuring terminal portion 9 as an electrical terminal group, and the main body 50 may include the main body terminal portion 10 as an electrical terminal group contacting the measuring terminal portion 9. Thus, the measuring meter 4 is mounted on the main body 50, so that the measuring terminal portion 9 and the main body terminal portion 10 are electrically connected.

[0038] In addition, as in the present embodiment, for example, the measurement terminal portion 9 may include a plurality of measurement terminals 11, and the main body terminal portion 10 may include a plurality of main body terminals 12 that contact the measurement terminals 11. It should be noted that the number of the measurement terminals 11 and the main body terminals 12 is not particularly limited, but is seven in the present embodiment.

[0039] like Figure 5 as well as Figure 6 As shown in the figure, the main body 50 may include, for example, a base portion 52 constituting the upper surface of the main body 50, and a sealing portion 53 fixed to the upper surface of the base portion 52 and sealing the measuring terminal 11 and the main body terminal 12. As in the present embodiment, the sealing portion 53 may be formed in a ring shape, for example, so that the main body terminal 12 is arranged inside. In addition, the sealing portion 53 may also have elasticity, for example.

[0040] As in the present embodiment, the main terminal 12 may include, for example: a terminal movable portion 13, which is movable in the upward and downward directions D3 relative to the base portion 52; a terminal fixing portion 14, which is fixed relative to the base portion 52 and can keep the terminal movable portion 13 sliding; and a terminal force applying portion (not shown) which applies an elastic restoring force upward to the terminal movable portion 13.

[0041] Next, regarding the method of attaching and detaching the measuring instrument 4 to the main body 50, refer to Figure 6 as well as Figure 7 It should be noted that the method of attaching and detaching the measuring instrument 4 to the main body 50 is not limited to the following method.

[0042] When the measuring meter 4 is mounted on the main body 50, Figure 6 As shown in FIG. 1 , the measurement insertion portion 41 is inserted into the interior of the main body recess 51. Then, the operation portion 56 is operated, as shown in FIG. Figure 7 As shown in FIG. 1 , the operation portion 56 is positioned at the clamping position. As a result, the operation portion 56 abuts against the measurement insertion portion 41, so that the measurement insertion portion 41 is clamped by the pair of first clamping portions 51a, 51a.

[0043] The stopper 54 abuts against the stopped portion 41c of the measuring insertion portion 41 from above at the stop position, and the stopper urging portion 55 applies elastic restoring force to the stopper 54, so that the measuring meter 4 does not fall off the main body 50. Thus, the measuring meter 4 is attached to the main body 50.

[0044] Then, the measuring terminal 11 is in contact with the main body terminal 12. Specifically, the measuring terminal 11 is arranged above the main body terminal 12, and the measuring terminal 11 is in contact with the main body terminal 12 in the up-down direction D3.

[0045] At this time, the terminal movable portion 13 of the main terminal 12 is pressed downward by the measuring terminal 11, so that the terminal movable portion 13 moves downward relative to the terminal fixing portion 14. In addition, since the terminal force applying portion (not shown) applies an upward elastic restoring force to the terminal movable portion 13, the terminal movable portion 13 presses and contacts the measuring terminal 11. Thus, the measuring terminal 11 and the main terminal 12 can be reliably electrically connected.

[0046] Furthermore, since the base portion 52 of the main body 50 and the measuring gauge 4 sandwich the sealing portion 53 in the vertical direction D3, the sealing portion 53 elastically deforms in the vertical direction D3 and comes into close contact with the measuring gauge 4. Thus, since the sealing portion 53, the base portion 52, and the measuring gauge 4 cooperate to cover the measuring terminals 11 and the main body terminals 12, the measuring terminals 11 and the main body terminals 12 are sealed.

[0047] In addition, the first measuring protrusion 41a (see Figure 3 as well as Figure 4 ) and the first main body protrusion 51c (see Figure 5 ), it is possible to effectively suppress the positional deviation of the measuring insertion portion 41 in the first lateral direction D1 relative to the main body recess 51. It should be noted that, as in the present embodiment, for example, the protruding height of the first measuring protrusion 41a increases as it moves upward, and the protruding height of the first main body protrusion 51c increases as it moves downward.

[0048] In addition, the second measuring protrusion 41b (see Figure 3 as well as Figure 4 ), it is possible to effectively suppress the positional displacement of the measuring insertion portion 41 in the second lateral direction D2 relative to the main body recess 51. It should be noted that, as in the present embodiment, for example, the protruding height of the second measuring protrusion 41b may increase as it moves upward.

[0049] On the contrary, when the measuring meter 4 is separated from the main body 50, Figure 6 As shown in FIG. 1 , the operation portion 56 is operated to be located at the retracted position. Thus, the operation portion 56 is separated from the measurement insertion portion 41 . Furthermore, the measurement meter 4 is separated from the main body 50 by pulling the measurement insertion portion 41 out of the main body recess 51 .

[0050] Next, regarding the structure of the measurement terminal section 9 and the main body terminal section 10, and the method of supplying power to the measurement device 2 (specifically, the method of supplying power to the measurement meter 4), see Figure 8 as well as Fig. 9 It should be noted that the configurations of the measurement terminal section 9 and the main body terminal section 10 are not limited to the following configurations, and the power supply method of the measurement device 2 is not limited to the following method.

[0051] like Figure 8 As shown, for example, the power supply unit 6 is a DC power supply 6. The DC power supply 6 may include a first polarity unit 6d having a first polarity (eg, positive) and a second polarity unit 6e having a second polarity (eg, negative) different from the first polarity.

[0052] The measuring meter 4 may include, for example, a measuring circuit unit 42 for measuring the fluid. As in the present embodiment, the measuring circuit unit 42 may include, for example, a power supply circuit unit 42a which serves as a main power supply of the measuring meter 4, and a control circuit unit 42b which serves as a control power supply of the measuring meter 4 (for example, a power supply used in an electrical signal indicating a measured value, a control signal for controlling each part of the measuring meter 4, etc.).

[0053] As in the present embodiment, the main body terminal 12 may include, for example, a plurality of first main body terminals 12a to 12d electrically connected to the first polarity portion 6d and a plurality of second main body terminals 12e to 12g electrically connected to the second polarity portion 6e. The number of each main body terminal 12 is not particularly limited, but in the present embodiment, for example, the number of the first main body terminals 12a to 12d is four, and the number of the second main body terminals 12e to 12g is three.

[0054] In addition, as in the present embodiment, the measuring device 2 may include, for example, a detection unit 15 that detects the attachment of the measuring meter 4 to the main body 5, and a switching unit 16 that switches between an electrically disconnected state and a connected state between the power supply unit 6 and the main body terminal unit 10 based on the detection by the detection unit 15. The detection unit 15 may detect the attachment of the measuring meter 4 to the main body 5 by, for example, detecting the contact between the measuring terminal 11 of the measuring terminal unit 9 and the main body terminal 12 of the main body terminal unit 10.

[0055] As in the present embodiment, the first main body terminals 12a to 12d may include, for example, a first main body detection terminal 12a electrically connected to the first polarity portion 6d without passing through the switching portion 16, and first main body switching terminals 12b to 12d electrically connected to the first polarity portion 6d via the switching portion 16. It should be noted that, although not particularly limited, in the present embodiment, the number of the first main body switching terminals 12b to 12d is, for example, three.

[0056] As in the present embodiment, the second main body terminals 12e to 12g may include, for example, a second main body detection terminal 12e electrically connected to the second polarity portion 6e without passing through the switching portion 16, and second main body switching terminals 12f to 12g electrically connected to the second polarity portion 6e without passing through the switching portion 16. Although not particularly limited, in the present embodiment, the number of the second main body switching terminals 12f to 12g is, for example, two.

[0057] As in the present embodiment, the measuring terminal 11 may, for example, include: a first measuring detection terminal 11a, which contacts the first main body detection terminal 12a; first measuring switching terminals 11b to 11d, which contact the first main body switching terminals 12b to 12d; a second measuring detection terminal 11e, which contacts the second main body detection terminal 12e; and second measuring switching terminals 11f to 11g, which contact the second main body switching terminals 12f to 12g.

[0058] As in the present embodiment, the detection unit 15 may include, for example: a detection circuit unit 15a, which forms a closed circuit between the first main body detection terminal 12a and the second main body detection terminal 12e by contacting the first main body detection terminal 12a with the first measurement detection terminal 11a and the second main body detection terminal 12e with the second measurement detection terminal 11e; and a current detection unit 15b, which detects the current flowing in the detection circuit unit 15a.

[0059] Furthermore, as in the present embodiment, the structure may be as follows: for example, when the current detection unit 15b does not detect the current flowing in the detection circuit unit 15a, the switching unit 16 electrically cuts off the power supply unit 6 from the first main body switching terminals 12b~12d; when the current detection unit 15b detects the current flowing in the detection circuit unit 15a, the switching unit 16 electrically connects the power supply unit 6 to the first main body switching terminals 12b~12d.

[0060] Thus, the first main body detection terminal 12a contacts the first measurement detection terminal 11a, and the second main body detection terminal 12e contacts the second measurement detection terminal 11e by attaching the measuring meter 4 to the main body 50. Therefore, since the detection circuit unit 15a forms a closed circuit between the first and second main body detection terminals 12a and 12e, current flows in the detection circuit unit 15a.

[0061] Furthermore, since the current detection unit 15b detects that the current is flowing in the current detection circuit unit 15a, the power supply unit 6 and the first main body switching terminals 12b to 12d are switched from an electrically disconnected state to a connected state. As a result, since the measurement switching terminals 11b to 11d, 11f to 11g are in contact with the main body switching terminals 12b to 12d, 12f to 12g, a closed circuit is formed between the first and second main body switching terminals 12b to 12d, 12f to 12g via the measurement circuit unit 42.

[0062] Therefore, since the power supply unit 6 is switched from the state of stopping supplying power to the measuring circuit unit 42 of the measuring meter 4 to the state of supplying power to the measuring circuit unit 42 of the measuring meter 4, the power of the power supply unit 6 is supplied to the measuring meter 4. That is, the voltage applied between the first and second main body switching terminals 12b to 12d, 12f to 12g is applied to the measuring circuit unit 42. It should be noted that the first and second main body detection terminals 12a and 12e are terminals for passing the current detected in the detection unit 15, and therefore may also be referred to as the first and second current detection terminals 12a and 12e.

[0063] It should be noted that there is no particular limitation on the structure of the detection unit 15 and the switching unit 16. The detection unit 15 and the switching unit 16 may be composed of, for example, hardware electrical components (such as timers, various relays, photocouplers), or software electrical components (soft sequencers), or hardware electrical components and software electrical components.

[0064] like Fig. 9 As shown, the main body terminals 12a to 12g may be arranged in a row along the second horizontal direction D2, for example. Specifically, as in the present embodiment, for example, a plurality of first main body terminals 12a to 12d may be arranged in a row along the horizontal direction D2, and a plurality of second main body terminals 12e to 12f may be arranged in a row along the second horizontal direction D2 in a manner that they are in a row with the plurality of first main body terminals 12a to 12d next to the plurality of first main body terminals 12a to 12d.

[0065] Furthermore, as in the present embodiment, for example, the first main body terminal 12a which is closest to the second main body terminals 12e to 12g among the first main body terminals 12a to 12d may be the first main body detection terminal 12a. Also, as in the present embodiment, for example, the second main body terminal 12e which is closest to the first main body terminals 12a to 12d among the second main body terminals 12e to 12g may be the second main body detection terminal 12e.

[0066] In addition, the main body 50 may include, for example, a first holding portion 57 fixed to the base portion 52 and holding a plurality of first main body terminals 12a to 12d, and a second holding portion 58 fixed to the base portion 52 and holding a plurality of second main body terminals 12e to 12g. In addition, as in the present embodiment, for example, the first holding portion 57 and the second holding portion 58 may hold the lower portion of the main body terminal 12 extending in the up-down direction D3. Thus, the main body terminal 12 protrudes upward from the holding portions 57 and 58.

[0067] Furthermore, as in the present embodiment, for example, the base portion 52 may include first to third through holes 52a to 52c extending in the vertical direction D3 inside the sealing portion 53. Thus, since the fluid entering the sealing portion 53 is discharged through the through holes 52a to 52c, the fluid can be prevented from being retained inside the sealing portion 53.

[0068] Moreover, as in the present embodiment, for example, the first holding portion 57 and the second holding portion 58 may be separated, and the first through hole 52a may be disposed between the first holding portion 57 and the second holding portion 58. Thus, since the fluid between the first holding portion 57 and the second holding portion 58 flows out through the first through hole 52a, it is possible to suppress the fluid from stagnating between the first holding portion 57 and the second holding portion 58.

[0069] In addition, as in the present embodiment, for example, each holding portion 57, 58 may protrude upward from the base portion 52. Thus, since there is a recess between the first holding portion 57 and the second holding portion 58, even if the fluid is retained inside the sealing portion 53, it is possible to suppress the fluid from being retained between the first holding portion 57 and the second holding portion 58.

[0070] In addition, as in the present embodiment, for example, each holding portion 57, 58 may hold each main body terminal 12 in a manner separated from the base portion 52. Thus, since each holding portion 57, 58 protrudes upward from the base portion 52, even if the fluid is retained inside the sealing portion 53, it is possible to suppress the fluid from being retained between each holding portion 57, 58 and the base portion 52. Therefore, it is possible to suppress the fluid from being retained between the base portion 52 and the main body terminal 12.

[0071] In this way, the fluid can be effectively prevented from stagnating between the first and second main body terminals 12a to 12d and 12e to 12g. However, for example, even when the measuring meter 4 is not installed in the main body 50, if a large amount of fluid is retained inside the sealing portion 53, the first and second main body detection terminals 12a and 12e may be electrically connected through the fluid.

[0072] In this case, the current flows between the first and second main body detection terminals 12a and 12e. It should be noted that since the voltage applied between the first and second main body detection terminals 12a and 12e is a DC voltage, the current cannot flow continuously even if it flows momentarily (for example, for several μ seconds). This is because a double electric layer is formed in the case of a DC voltage, and the fluid functions as a capacitor.

[0073] Therefore, as in the present embodiment, for example, when the current detection unit 15b detects the current flowing through the detection circuit unit 15a for a set time, the switching unit 16 may switch the power supply unit 6 and the first main body switching terminals 12b to 12d from the electrically disconnected state to the connected state. This can suppress the voltage of the power supply unit 6 from being erroneously applied between the first and second main body switching terminals 12b to 12d and 12f to 12g.

[0074] It should be noted that, conversely, when the current detection unit 15b detects that the current does not flow in the detection circuit unit 15a for a set time, the switching unit 16 switches the power supply unit 6 and the first main body switching terminals 12b to 12d from the electrically connected state to the disconnected state. This can suppress the voltage of the power supply unit 6 from being erroneously applied between the first and second main body switching terminals 12b to 12d and 12f to 12g.

[0075] Although not particularly limited, the set time may be, for example, 100 mSec or more, and preferably, 200 mSec or more. In addition, after the meter 4 is mounted on the main body 5, in order to smoothly supply power to the meter 4, the set time may be, for example, 1000 mSec or less, and preferably, 500 mSec or less.

[0076] According to the above, as in this embodiment, the following structure is preferable in the measuring device 2: The measuring device 2 comprises: a measuring meter 4 for measuring a fluid; and The main body 5 is used for loading and unloading the measuring meter 4. The measuring instrument 4 includes a plurality of measuring terminals 11. The main body 5 includes a plurality of main body terminals 12. The plurality of main body terminals 12 are in contact with the plurality of measurement terminals 11 when the measuring meter 4 is mounted on the main body 5. The measuring device 2 comprises: a power supply unit 6 for supplying power to the plurality of main body terminals 12; a detection unit 15 for detecting that the measuring meter 4 is mounted on the main body 5; and The switch unit 16 switches the connection between the power supply unit 6 and at least one of the plurality of main body terminals 12 (the first main body switch terminals 12 b to 12 d in this embodiment) from an electrically disconnected state to a connected state when the detection unit 15 detects the attachment.

[0077] According to such a configuration, by attaching the measuring meter 4 to the main body 5, the plurality of main body terminals 12 come into contact with the plurality of measuring terminals 11, and the detection unit 15 detects that the measuring meter 4 is attached to the main body 5. When the detection unit 15 detects the attachment, the power supply unit 6 and at least one of the plurality of main body terminals 12 (the first main body switching terminals 12b to 12d in this embodiment) are switched from an electrically disconnected state to a connected state. Thus, the power of the power supply unit 6 can be supplied to the measuring meter 4 via the main body 5.

[0078] In addition, as in this embodiment, the following structure is preferable in the measuring device 2: The detection unit 15 detects contact between the measurement terminal 11 and the main body terminal 12. When the detection unit 15 detects the contact, the switch unit 16 switches the connection between the power supply unit 6 and at least one of the plurality of main body terminals 12 (the first main body switch terminals 12 b to 12 d in this embodiment) from an electrically disconnected state to a connected state.

[0079] According to such a configuration, when the detection unit 15 detects contact between the measuring terminal 11 and the main body terminal 12, the power supply unit 6 and at least one of the plurality of main body terminals 12 (the first main body switching terminal 12b to 12d in this embodiment) are switched from an electrically disconnected state to a connected state. Thus, after the measuring terminal 11 and the main body terminal 12 are in contact, the power of the power supply unit 6 can be supplied to the measuring meter 4 via the main body 5.

[0080] In addition, as in this embodiment, the following structure is preferable in the measuring device 2: The plurality of main body terminals 12 include: First main body detection terminal 12a; a second main body detection terminal 12e to which the voltage of the power supply unit 6 is applied with the first main body detection terminal 12a; and At least one main body switching terminal 12b-12d is connected to the power supply unit 6 via the switching unit 16. The measuring meter 4 comprises: A first measurement detection terminal 11a, which contacts the first main body detection terminal 12a; a second measurement detection terminal 11e, which contacts the second main body detection terminal 12e; and at least one measurement switching terminal 11b-11d, which contacts the at least one main body switching terminal 12b-12d, The detection unit 15 comprises: a detection circuit unit 15a that forms a closed circuit between the first main body detection terminal 12a and the second main body detection terminal 12e by contacting the first main body detection terminal 12a with the first measurement detection terminal 11a and contacting the second main body detection terminal 12e with the second measurement detection terminal 11e; and The current detection unit 15b detects the current flowing in the detection circuit unit 15a. When the current detection unit 15 b detects the current, the switching unit 16 switches the power supply unit 6 and the at least one main body switching terminal 12 b to 12 d from an electrically disconnected state to a connected state.

[0081] According to such a structure, the first main body detection terminal 12a is brought into contact with the first measurement detection terminal 11a, and the second main body detection terminal 12e is brought into contact with the second measurement detection terminal 11e by attaching the measuring instrument 4 to the main body 5. Thus, the detection circuit unit 15 forms a closed circuit between the first main body detection terminal 12a and the second main body detection terminal 12e.

[0082] Furthermore, since the voltage of the power supply unit 6 is applied between the first main body detection terminal 12a and the second main body detection terminal 12e, the current flows in the detection circuit unit 15a. Therefore, since the current detection unit 15b detects the current flowing in the detection circuit unit 15a, the power supply unit 6 and at least one of the main body switching terminals 12b to 12d are switched from an electrically disconnected state to a connected state.

[0083] In addition, as in this embodiment, the following structure is preferable in the measuring device 2: The power source unit 6 is a DC power source 6 having a first polarity unit 6d having a first polarity and a second polarity unit 6e having a second polarity different from the first polarity. The first main body detection terminal 12a is electrically connected to the first polarity portion 6d. The second main body detection terminal 12e is electrically connected to the second polarity portion 6e. When the current detection unit 15 b detects the current for a set period of time, the switch unit 16 switches the power supply unit 6 and the at least one main body switch terminal 12 b to 12 d from an electrically disconnected state to a connected state.

[0084] The first main body detection terminal 12a is electrically connected to the first polarity portion 6d of the DC power supply 6, and the second main body detection terminal 12e is electrically connected to the second polarity portion 6e of the DC power supply 6. Therefore, assuming that the first and second main body detection terminals 12a and 12e are electrically connected via a fluid, although current flows momentarily between the first and second main body detection terminals 12a and 12e, it does not flow continuously.

[0085] In this case, when the current detection unit 15b detects a current for a set time, the power supply unit 6 and at least one of the main body switching terminals 12b to 12d are switched from an electrically disconnected state to a connected state. This can prevent the power supply unit 6 from being erroneously electrically connected to the main body switching terminals 12b to 12d.

[0086] In addition, as in this embodiment, the following structure is preferable in the measuring device 2: The power source 6 is a DC power source 6, and the DC power source 6 has a first polarity portion 6d as a first polarity and a second polarity portion 6e as a second polarity different from the first polarity. The plurality of main body terminals 12 include: a plurality of first main body terminals 12a-12d, which are electrically connected to the first polarity portion 6d; and A plurality of second main body terminals 12e-12g, which are electrically connected to the second polarity portion 6e, The main body 5 has: base 52; a first holding portion 57 fixed to the base portion 52 and holding the plurality of first main body terminals 12 a to 12 d in a manner separated from the base portion 52 ; and The second holding portion 58 is fixed to the base portion 52 and holds the plurality of second main body terminals 12e to 12g in a manner separated from the base portion 52. The first holding portion 57 and the second holding portion 58 each protrude upward from the base portion 52 .

[0087] According to such a structure, since the first holding portion 57 and the second holding portion 58 protrude upward from the base portion 52, the fluid can be prevented from stagnating between the holding portions 57 and 58 and the base portion 52. Thus, the fluid can be prevented from stagnating between the first and second main body terminals 12a to 12d and 12e to 12g via the base portion 52.

[0088] In addition, as in this embodiment, the following structure is preferable in the measuring device 2: The first holding portion 57 is separated from the second holding portion 58 in a manner that the first holding portion 57 is recessed from the second holding portion 58 .

[0089] According to such a structure, since the first holding portion 57 and the second holding portion 58 are separated, there is a recess between the first holding portion 57 and the second holding portion 58. This can prevent the fluid from stagnating in the first holding portion 57 and the second holding portion 58. Therefore, it can prevent the fluid from stagnating between the first and second main body terminals 12a to 12d and 12e to 12g.

[0090] In addition, as in this embodiment, the following structure is preferable in the measuring device 2: The power source unit 6 is a DC power source 6 having a first polarity unit 6d having a first polarity and a second polarity unit 6e having a second polarity different from the first polarity. The plurality of main body terminals 12 include: a plurality of first main body terminals 12a-12d, which are electrically connected to the first polarity portion 6d; and A plurality of second main body terminals 12e-12g, which are electrically connected to the second polarity portion 6e, The main body 5 has: A first holding portion 57 that holds the plurality of first main body terminals 12a to 12d; a second holding portion 58 that holds the plurality of second main body terminals 12e to 12g and is separated from the first holding portion 57; and The through hole 52 a penetrates between the first holding portion 57 and the second holding portion 58 in the up-down direction D3 .

[0091] According to such a structure, the first holding portion 57 and the second holding portion 58 are separated, and the through hole 52a penetrates in the up-down direction D3 between the first holding portion 57 and the second holding portion 58. Thus, since the fluid between the first holding portion 57 and the second holding portion 58 flows through the through hole 52a, it is possible to suppress the fluid from stagnating between the first holding portion 57 and the second holding portion 58. Therefore, it is possible to suppress the fluid from stagnating between the first and second main body terminals 12a to 12d, 12e to 12g.

[0092] In addition, as in this embodiment, in the measurement system 1, the following structure is preferable: The measuring system 1 comprises: The measuring device 2; and The communication device 3 is capable of communicating with the measurement device 2 .

[0093] According to such a configuration, electric power from the power supply unit 6 can be supplied to the measuring meter 4 via the main body 5 .

[0094] In addition, as in the present embodiment, the following method is preferred in the method of supplying power to the measuring device 2: A method for supplying power to a measuring device 2 including a measuring meter 4 for measuring a fluid and a main body 5 to which the measuring meter is attached and detached. The measuring instrument 4 includes a plurality of measuring terminals 11. The main body 5 includes a plurality of main body terminals 12. The plurality of main body terminals 12 are in contact with the plurality of measurement terminals 11 when the measuring meter 4 is mounted on the main body 5. The measuring device 2 comprises: a power supply unit 6 for supplying power to the plurality of main body terminals 12; a detection unit 15 for detecting the installation of the measuring meter 4 to the main body 5; and a switching unit 16 for switching the power supply unit 6 and at least one of the plurality of main body terminals 12 (the first main body switching terminals 12b to 12d in this embodiment) from an electrically disconnected state to a connected state when the detection unit 15 detects the installation, The power supply method includes mounting the measuring meter 4 on the main body 5 so that the plurality of measuring terminals 11 are in contact with the plurality of main body terminals 12 .

[0095] According to such a method, the electric power of the power supply unit 6 can be supplied to the measuring meter 4 via the main body 5 .

[0096] It should be noted that the measurement system 1, the measurement device 2, and the power supply method of the measurement device 2 are not limited to the structure of the above-mentioned embodiment, and are not limited to the above-mentioned effects. In addition, the measurement system 1, the measurement device 2, and the power supply method of the measurement device 2 can of course be variously changed within the scope that does not deviate from the gist of the present invention. For example, it is of course possible to arbitrarily select one or more structures, methods, etc. related to the various modified examples described below and adopt them in the structure, method, etc. of the above-mentioned embodiment.

[0097] (A) In the measuring device 2 of the above embodiment, the detection unit 15 has a current detection unit 15b that detects the current flowing in the detection circuit unit 15a, and the switching unit 16 switches the power supply unit 6 and at least one of the plurality of main body terminals 12b to 12d from an electrically disconnected state to a connected state when the current detection unit 15b detects the current. That is, the detection unit 15 has a structure in which the mounting of the measuring meter 4 to the main body 5 is detected by detecting the contact between the measuring terminal 11 and the main body terminal 12. However, the measuring device 2 is not limited to such a structure.

[0098] For example, the following structure may be adopted: the detection unit 15 includes a sensor (e.g., a photoelectric sensor, a proximity sensor, a contact sensor, etc.) for detecting the movement of the terminal movable portion 13, and the switching unit 16 switches the state of electrical disconnection between the power supply unit 6 and at least one of the plurality of main body terminals 12b to 12d from a state of connection when the sensor detects the movement of the terminal movable portion 13. Thus, the detection unit 15 detects the attachment of the measuring meter 4 to the main body 5 by detecting the contact between the measuring terminal 11 and the main body terminal 12.

[0099] In addition, for example, the following structure may be adopted: the detection unit 15 includes a protrusion protruding downward from the measuring meter 4, a switch arranged on the main body 5 and pressed by the protrusion, and a sensor (for example, a pressure sensor, a proximity sensor, etc.) for detecting that the switch is pressed, and the switching unit 16 switches the power supply unit 6 and at least one of the plurality of main body terminals 12 12b to 12d from an electrically disconnected state to a connected state when the sensor detects that the switch is pressed. Thus, the detection unit 15 can detect that the measuring meter 4 is mounted on the main body 5.

[0100] (B) In the measurement device 2 of the above embodiment, the power supply unit 6 is a DC power supply 6 having a first polarity unit 6d and a second polarity unit 6e. However, the measurement device 2 is not limited to such a configuration. For example, the power supply unit 6 may be an AC power supply.

[0101] (C) In the measuring device 2 of the above embodiment, the switch unit 16 switches the power supply unit 6 and the main body switching terminals 12b to 12d and 12f to 12g from an electrically disconnected state to a connected state when the current detection unit 15b detects a current flowing through the detection circuit unit 15a for a set time. However, the measuring device 2 is not limited to such a structure.

[0102] For example, the switch unit 16 may be configured to switch the power supply unit 6 and at least one of the plurality of main body terminals 12b to 12d from an electrically disconnected state to a connected state immediately after the current detection unit 15b detects the current flowing through the detection circuit unit 15a.

[0103] (D) In ​​the measuring device 2 of the above embodiment, the holding portions 57 and 58 hold the plurality of main body terminals 12a to 12d and 12e to 12g in a manner separated from the base portion 52. However, the measuring device 2 is not limited to such a structure. For example, a structure may be adopted in which at least one of the first holding portion 57 and the second holding portion 58 is in contact with the base portion 52 to hold the plurality of main body terminals 12a to 12d and 12e to 12g.

[0104] (E) In the measurement device 2 of the above embodiment, the holding portions 57 and 58 are respectively configured to protrude upward from the base portion 52. However, the measurement device 2 is not limited to such a configuration. For example, at least one of the first holding portion 57 and the second holding portion 58 may be configured to be recessed downward from the base portion 52, or may be, for example, at the same height as the base portion 52 (at the same position in the vertical direction D3).

[0105] (F) In the measurement device 2 of the above embodiment, the first holding portion 57 is separated from the second holding portion 58 . However, the measurement device 2 is not limited to such a structure. For example, the first holding portion 57 may be in contact with the second holding portion 58 .

[0106] (G) In the measurement device 2 of the above embodiment, the main body 5 includes the through hole 52 that penetrates in the vertical direction D3 between the first holding part 57 and the second holding part 58 inside the sealing part 53. However, the measurement device 2 is not limited to such a structure.

[0107] For example, the main body 5 may be configured such that the through holes 52a to 52c penetrating in the vertical direction D3 are not provided inside the sealing portion 53. In addition, for example, the main body 5 may be configured such that the through hole penetrating in the vertical direction D3 is provided inside the sealing portion 53 and only at a position separated from the first holding portion 57 and the second holding portion 58.

[0108] (H) In the measuring device 2 of the above embodiment, the measuring terminal 11 is arranged above the main body terminal 12, and the measuring terminal 11 and the main body terminal 12 are in contact with each other in the vertical direction D3. However, the measuring device 2 is not limited to such a structure. For example, the measuring terminal 11 and the main body terminal 12 may be in contact with each other in the horizontal directions D1 and D2.

[0109] (I) In the measuring device 2 of the above embodiment, the plurality of first main body terminals 12a to 12d are arranged in a row along the second horizontal direction D2, and the plurality of second main body terminals 12e to 12f are arranged in a row along the second horizontal direction D2 beside the plurality of first main body terminals 12a to 12d so as to be in a row with the plurality of first main body terminals 12a to 12d. However, the measuring device 2 is not limited to such a structure.

[0110] For example, the plurality of first main body terminals 12a to 12d may be arranged in a row along the second horizontal direction D2, and the plurality of second main body terminals 12e to 12f may be separated from the plurality of first main body terminals 12a to 12d in the first horizontal direction D1 and arranged in a row along the second horizontal direction D2. In addition, for example, the plurality of first main body terminals 12a to 12d may be arranged in a ring shape, and the plurality of second main body terminals 12e to 12f may be arranged in a ring shape.

[0111] (J) In the measuring device 2 of the above embodiment, the first main body terminal 12a closest to the second main body terminals 12e to 12g among the plurality of first main body terminals 12a to 12d is the first main body detection terminal 12a. However, the measuring device 2 is not limited to such a structure. For example, the first main body terminal 12b (12c, 12d) closest to the second main body terminals 12e to 12g among the plurality of first main body terminals 12a to 12d may be the first main body detection terminal 12b (12c, 12d).

[0112] (K) In the measuring device 2 of the above embodiment, the second main body terminal 12e closest to the first main body terminals 12a to 12d among the plurality of second main body terminals 12e to 12g is the second main body detection terminal 12e. However, the measuring device 2 is not limited to such a structure. For example, the second main body terminal 12f (12g) closest to the first main body terminals 12a to 12d among the plurality of second main body terminals 12e to 12g may be the second main body detection terminal 12f (12g).

[0113] Thus, for example, the measuring device 2 may have the following structure: The plurality of first main body terminals 12a to 12d are arranged in a row along the horizontal direction D2. The plurality of second main body terminals 12e to 12f are arranged in a row along the horizontal direction D2 so as to be in a row with the plurality of first main body terminals 12a to 12d. The first main body terminal 12b (12c, 12d) closest to the second main body terminals 12e to 12g among the plurality of first main body terminals 12a to 12d is the first main body switching terminal 12b (12c, 12d). The second main body terminal 12 f ( 12 g ) closest to the plurality of first main body terminals 12 a to 12 d among the plurality of second main body terminals 12 e to 12 g is the second main body switching terminal 12 f ( 12 g ).

[0114] According to such a structure, at least the first main body switching terminal 12b (12c, 12d) and the second main body switching terminal 12f (12g) are arranged between the first main body detection terminal 12a and the second main body detection terminal 12e. Thus, since the first main body detection terminal 12a and the second main body detection terminal 12e are separated, it is possible to prevent the first main body detection terminal 12a and the second main body detection terminal 12e from being unnecessarily electrically connected due to fluid, conductive material, etc.

[0115] (L) In the measuring device 2 of the above embodiment, when the detection unit 15 detects that the measuring meter 4 is attached to the main body 5, the switching unit 16 switches the power supply unit 6 and a part of the plurality of main body terminals 12 (specifically, all the first main body switching terminals 12b to 12d among the plurality of main body terminals 12) from an electrically disconnected state to a connected state. However, the measuring device 2 is not limited to such a structure.

[0116] For example, when the detection unit 15 detects that the measuring meter 4 is attached to the main body 5, the switching unit 16 switches the power supply unit 6 from the electrically disconnected state to the connected state to all of the plurality of main body terminals 12. In addition, for example, when the detection unit 15 detects that the measuring meter 4 is attached to the main body 5, the switching unit 16 switches the power supply unit 6 from the electrically disconnected state to the connected state to all of the main body switching terminals 12b to 12d and 12f to 12g of the plurality of main body terminals 12.

[0117] (M) For example, the execution order of each process such as operation, sequence, step, and stage in the method and apparatus shown in the patent claims, specification, and drawings can be implemented in any order as long as the result of the previous process is not used for the next process. For example, even if the description is made using "first", "next", etc. for convenience, it does not mean that it must be executed in this order.

Claims

1. A measuring device, characterized in that: have: a meter that measures a fluid; and A main body for loading and unloading the measuring meter, The measuring instrument includes a plurality of measuring terminals. The main body includes a plurality of main body terminals, and the plurality of main body terminals are in contact with the plurality of measurement terminals when the measurement meter is mounted on the main body. The measuring device comprises: a power supply unit for supplying power to the plurality of main body terminals; a detection unit that detects attachment of the measuring meter to the main body; and A switching unit switches the power supply unit and at least one of the plurality of main body terminals from an electrically disconnected state to a connected state when the detection unit detects the attachment.

2. The measuring device according to claim 1, characterized in that The plurality of main body terminals include: A first main body detection terminal; a second main body detection terminal to which a voltage of the power supply unit is applied with the first main body detection terminal; and at least one main body switching terminal connected to the power supply unit via the switching unit, The measuring instrument comprises: a first determination detection terminal, which contacts the first main body detection terminal; a second measurement detection terminal in contact with the second main body detection terminal; and at least one assay switching terminal in contact with the at least one body switching terminal, The detection unit comprises: a detection circuit unit that forms a closed circuit between the first main body detection terminal and the second main body detection terminal by contacting the first main body detection terminal with the first measurement detection terminal and contacting the second main body detection terminal with the second measurement detection terminal; and a current detection unit that detects the current flowing in the detection circuit unit, The switching unit switches the power supply unit and the at least one main body switching terminal from an electrically disconnected state to a connected state when the current detection unit detects the current.

3. The measuring device according to claim 2, characterized in that The power supply unit is a DC power supply having a first polarity unit having a first polarity and a second polarity unit having a second polarity different from the first polarity. The first main body detection terminal is electrically connected to the first polarity portion, The second main body detection terminal is electrically connected to the second polarity portion, The switching unit switches the power supply unit and the at least one main body switching terminal from an electrically disconnected state to a connected state when the current detection unit detects the current for a set period of time.

4. The measuring device according to any one of claims 1 to 3, characterized in that The power supply unit is a DC power supply having a first polarity unit having a first polarity and a second polarity unit having a second polarity different from the first polarity. The plurality of main body terminals include: a plurality of first main body terminals electrically connected to the first polarity portion; and a plurality of second body terminals, which are electrically connected to the second polarity portion, The subject has: base; a first holding portion fixed to the base portion and holding the plurality of first main body terminals in a manner separated from the base portion; as well as a second holding portion fixed to the base portion and holding the plurality of second main body terminals in a manner separated from the base portion; The first holding portion and the second holding portion each protrude upward from the base portion.

5. The measuring device according to claim 4, characterized in that The first holding portion is separated from the second holding portion in a manner that the first holding portion is recessed from the second holding portion.

6. The measuring device according to any one of claims 1 to 3, characterized in that The power supply unit is a DC power supply having a first polarity unit having a first polarity and a second polarity unit having a second polarity different from the first polarity. The plurality of main body terminals include: a plurality of first main body terminals electrically connected to the first polarity portion; and a plurality of second body terminals, which are electrically connected to the second polarity portion, The subject has: a first holding portion that holds the plurality of first main body terminals; a second holding portion that holds the plurality of second main body terminals and is separated from the first holding portion; and A through hole is provided between the first holding portion and the second holding portion and penetrates in the up-down direction.

7. A measurement system, characterized in that have: A measuring device according to any one of claims 1 to 3; and A communication device capable of communicating with the measuring device.

8. A method for supplying power to a measuring device, characterized in that: A method for supplying power to a measuring device including a measuring meter for measuring a fluid and a main body to which the measuring meter is attached and detached. The measuring instrument includes a plurality of measuring terminals. The main body includes a plurality of main body terminals, and the plurality of main body terminals are in contact with the plurality of measurement terminals when the measurement meter is mounted on the main body. The measuring device comprises: a power supply unit for supplying power to the plurality of main body terminals; a detection unit that detects attachment of the measuring meter to the main body; and a switching unit that switches the power supply unit and at least one of the plurality of main body terminals from an electrically disconnected state to a connected state when the detection unit detects the installation, The power supply method includes mounting the measuring meter on the main body in such a manner that the plurality of measuring terminals are in contact with the plurality of main body terminals.

Images