TWM581195U - Meter head monitoring device - Google Patents

Abstract

A meter monitoring device is adapted to be coupled to a meter head that includes a pointer. The meter monitoring device includes a sensing unit and a processing unit electrically connected to the sensing unit. The sensing unit includes at least three sensing elements respectively corresponding to a plurality of sensing positions distributed on a rotating path of the pointer for sensing the rotation of the pointer. The processing unit determines the direction and the number of turns of the pointer according to the result sensed by the sensing unit.

Description

Head monitoring device

The present invention relates to a meter monitoring device, and more particularly to a meter monitoring device suitable for use with a meter head.

In the prior art, water meters for apartments or community buildings are usually placed in the top floor or stairwell, and the water supply agency regularly dispatches personnel to the on-site meter reading to record the water consumption of each household in the current season.

However, manual meter reading is quite laborious and time consuming, and the water meters of some old buildings are scattered in the residential space of the household, which is more inconvenient for manual meter reading. Therefore, there is still room for improvement in the prior art.

Accordingly, it is an object of the present invention to provide a meter monitoring device that can improve the inconvenience of the prior art.

Thus, the novel meter monitoring device is adapted to be coupled to a meter head that includes a pointer. The meter monitoring device includes a sensing unit and a processing unit electrically connected to the sensing unit. The sensing unit includes at least three sensing elements respectively corresponding to a plurality of sensing positions distributed on a rotating path of the pointer for sensing the rotation of the pointer. The processing unit determines the direction and the number of turns of the pointer according to the result sensed by the sensing unit.

In some embodiments of the novel meter monitoring device, the meter head further includes a surface for the pointer; wherein the sensing elements are adapted to be spaced apart from the surface of the meter head.

In some embodiments of the present meter monitoring device, the pointer has a self-rotating end located at the axis of rotation of the pointer, and a radial extension extending toward the rotating end and moving along a closed trajectory Instructing the ends; wherein the sensing locations are adapted to be distributed around the free end of the pointer and staggered in a radial direction of the rotating end, and the sensing locations are adapted to be located within the closed track.

In some embodiments of the present invention, the meter head further includes a body; the head monitoring device further includes a housing unit for the sensing unit, the housing unit and the head The body shape is adapted to be coupled to the body.

In some embodiments of the present invention, the housing unit is hollow and at least partially permeable to light, and the sensing unit is disposed in the housing unit.

In some embodiments of the present invention, the sensing unit is movably disposed in the housing unit.

In some embodiments of the present invention, the housing unit includes a substrate having a sliding slot formed thereon, and the sensing unit is disposed on the substrate and can be along the substrate The extending direction of the chute reciprocates.

In some embodiments of the present invention, the meter monitoring device further includes a connecting member that passes through the sensing unit and the sliding slot, and the connecting member can be coupled with the sensing unit with respect to the substrate The ground reciprocates along the extending direction of the chute, and the sensing unit can rotate about the connecting member.

In some embodiments of the present invention, the housing unit further includes a lower cover body adapted to engage with the body shape of the meter head, and a lower cover body combined with the lower cover body And an upper cover body defining an accommodating space, the substrate is disposed in the accommodating space, and the sensing unit is located between the substrate and the lower cover.

In some implementations of the novel meter monitoring device, the meter monitoring device further includes a communication unit electrically connected to the processing unit, wherein when the processing unit determines that a first condition is met, the processing unit is configured according to The pointer generates a cumulative amount of the number of turns accumulated during a statistical period, and outputs the accumulated amount to the cloud server via the communication unit, the first condition including the direction in which the pointer rotates is constant during the statistical period. a first direction and the current time reaches a predetermined time, and when the processing unit determines that a second condition is met, the processing unit generates an alert notification and outputs the alert notification to the cloud server via the communication unit. The second condition includes the direction in which the pointer rotates is a second direction opposite to the first direction.

In some implementations of the novel meter monitoring device, the sensing unit further includes a control circuit electrically connected to the sensing elements, and the control circuit determines, by each sensing element, that the pointer reaches the sensing When the component corresponds to the sensing position, the control circuit outputs a pair of sensing signals corresponding to the sensing component to the processing unit, and the processing unit determines that the pointer rotates according to the order in which the sensing signals are received. direction.

In some embodiments of the present invention, the meter head further includes a body and a surface for the pointer, and the pointer has a rotation end located at an axis of the pointer when the pointer is rotated, and An indicator end that extends radially toward the end of the rotation and moves along a closed trajectory. The meter monitoring device further includes a housing unit, a connector, and a communication unit electrically connected to the processing unit. At least part of the housing unit is a light transmissive material, and the housing unit comprises a lower cover body, an upper cover body and a base plate, and the lower cover body is adapted to be coupled with the body shape of the watch head. The upper cover body is combined with the lower cover body and cooperates with the lower cover body to define an accommodating space. The substrate is disposed in the accommodating space, and a sliding slot is formed on the substrate. The connecting member penetrates the sensing unit and the sliding slot, and is reciprocable with the sensing unit along the extending direction of the sliding slot relative to the substrate. The sensing unit further includes a control circuit electrically connected to the sensing components, and the control circuit outputs when the control circuit determines that the pointer reaches the sensing position corresponding to the sensing component through each sensing component. a pair of sensing signals of the sensing component to the processing unit, and the sensing unit is disposed in the accommodating space and located between the substrate and the lower cover body, and can be axially centered on the connecting component Rotating, and the sensing elements are adapted to be spaced apart from the surface of the meter head, and the sensing locations corresponding to the sensing elements are adapted to be distributed around the rotating end of the pointer And interlaced with each other in the radial direction of the rotation end, and the sensing positions are adapted to be located within the closed trajectory. The processing unit determines the direction in which the pointer rotates according to the order in which the sensing signals are received, and when the processing unit determines that a first condition is met, the processing unit accumulates according to the pointer during a statistical period. The lap number generates a cumulative amount, and the accumulated amount is output to the cloud server via the communication unit, the first condition includes that the direction in which the pointer rotates is always a first direction during the statistical period and the current time reaches one a predetermined time, and when the processing unit determines that a second condition is met, the processing unit generates an alert notification and outputs the alert notification to the cloud server via the communication unit, the second condition including the pointer rotating The direction is a second direction opposite to the first direction.

The effect of the present invention is that, by the relative positional relationship between the sensing elements and the pointer, the processing unit can determine the direction and the number of turns of the pointer according to the sensing result of the sensing unit, and achieve the right The meter automatically reads the meter, so that it is not necessary to perform meter reading in a laborious and time-consuming manner, and can certainly overcome the inconvenience of the prior art.

Before the present invention is described in detail, it should be noted that in this patent specification, directional terms such as "upper", "lower", "left", "right", "front", "back" are used to match the case. The relative relationship between the various hardware structures in the combination/connection/activity/position in the embodiment of the present invention is schematically illustrated, and is not intended to limit the absolute orientation of any of the structures of the present invention.

Referring to Figure 1, an embodiment of the present meter monitoring device 1 is adapted for use with a meter head 5 and achieves an automatic meter reading of the meter head 5.

In this embodiment, the meter head 5 can be, for example, a water meter head, and the head 5 includes a body 51, a surface 52, and a plurality of hands disposed on the surface 52. For ease of understanding, how the head monitoring device 1 of the present embodiment cooperates with the meter head 5 will be described below only with the pointer 53 indicated in FIG. In addition, in other implementation manners of this embodiment, the meter head 5 can also be, for example, an electric meter head. More specifically, as long as it is a head with a pointer on the surface, the head monitoring of the embodiment The device 1 can be combined with it and automatically read.

Referring to FIG. 2 and FIG. 3 , the head monitoring device 1 includes a housing unit 11 , a connecting member 12 , a communication unit 13 , a sensing unit 14 , and an electrical connection unit 13 and the sensing unit Processing unit 15 of 14.

In this embodiment, the housing unit 11 is made of a transparent material (for example, transparent acrylic), and the housing unit 11 includes a lower cover 111, an upper cover 112, and a cover shown in FIG. Substrate 113. Referring to FIG. 1 , the lower cover 111 is matched with the shape of the body 51 of the head 5 , and is adapted to be detachably coupled to the body 51 in a snap-fit manner, whereby the meter monitoring device 1 is It can be combined with the head 5 without disassembling the head 5. The upper cover body 112 is combined with the lower cover body 111 and cooperates with the lower cover body 111 to define an accommodating space 114. The communication unit 13, the sensing unit 14 and the processing unit 15 are in this embodiment. They are all disposed in the accommodating space 114, but are not limited thereto.

Referring to FIG. 3 and FIG. 4 , the substrate 113 is substantially semi-circular and disposed in the accommodating space 114 in this embodiment. In more detail, the substrate 113 has a first side 115 in a horizontal direction in FIG. 4, and a second side 116 having a curvature and connecting both ends of the first side 115, and the first side 115 is on the first side 115. A sliding slot 117 is formed, and the extending direction of the sliding slot 117 is, for example, perpendicular to the first side 115 in this embodiment. It should be noted that in other embodiments, the sliding groove 117 can also be replaced by a perforation which is elongated and extends perpendicular to the first side 115, and is not limited to the embodiment.

In this embodiment, the communication unit 13 is implemented, for example, as a wireless communication module, and is, for example, a wireless communication module using Wi-Fi technology. However, in other embodiments, the communication unit 13 may also be, for example, a fourth-generation mobile communication network (also known as a 4G mobile communication network), an NB-IoT (English name: Narrow Band Internet of Things), and a LoRa (English). The wireless communication module of the technology, such as Long Range), Bluetooth, radio, Sigfox and RFID, or the communication unit 13 can also be combined with an existing wired transmission medium (for example, twisted pair) by any of the aforementioned wireless communication technologies. This is done by wires, coaxial cables, optical fibers, etc., and is not limited to this embodiment.

The sensing unit 14 includes a control circuit 141 and three sensing elements 142 electrically connected to the control circuit 141 in this embodiment. Each of the sensing elements 142 is, for example, an infrared type motion sensor, and can detect whether or not an object passes through the sensed position according to whether the infrared rays emitted by the infrared light is reflected, and, in this embodiment, The three sensing elements 142 are, for example, arranged in a triangle as shown in FIG. 4, but are not limited thereto. In other embodiments, the sensing unit 14 may include four, five or more sensing elements 142, and the sensing elements 142 are not limited to infrared, but also For example, a sensor that detects whether an object passes by, such as detecting a change in color or a change in light reflection, is not limited to this embodiment.

Continuing to refer to FIG. 3 and FIG. 4 , the whole of the sensing unit 14 is implemented as a separate circuit board in the embodiment, and the sensing unit 14 is movably disposed on the substrate 113 and located on the substrate. 113 is between the lower cover 111 and the lower cover 111. Thereby, when the meter monitoring device 1 is combined with the meter head 5, the sensing elements 142 of the sensing unit 14 are spaced apart from each other by the surface 52 of the meter head 5 as shown in FIG. More specifically, the sensing unit 14 is disposed by the connecting member 12 as shown in FIG. 4, and the connecting member 12 also passes through the sliding slot 117 on the substrate 113. The measuring unit 14 is movably disposed on a side of the substrate 113 facing the lower cover 111 through the insertion of the connecting member 12. In the present embodiment, the connecting member 12 is embodied, for example, as a bolt that fits the size of the sliding slot 117, but is not limited thereto.

As shown in FIG. 4, the sensing unit 14 can be coupled with the connecting member 12 with respect to the substrate 113 in a displacement direction D (ie, the chute) by the cooperation of the connecting member 12 and the sliding slot 117. The direction of extension of 117 is reciprocated. On the other hand, the sensing unit 14 can also rotate back and forth in a rotation direction R with respect to the substrate 113 with the connecting member 12 as an axis. By the movability of the sensing unit 14, the position of the three sensing elements 142 can be facilitated to correspond to the pointer 53 of the meter head 5 as shown in FIG. 5, and the sensing unit 14 can be borrowed. The rotation of the pointer 53 is sensed by the sensing elements 142.

It is to be noted that, since the housing unit 11 is transparent in this embodiment, even if the lower cover 111 is located between the sensing unit 14 and the pointer 53 (refer to FIG. 3), the sensing is performed. The unit 14 can still sense the rotation of the pointer 53 through the lower cover 111. In addition, in other embodiments, the housing unit 11 does not have to be completely transparent, but may be made of, for example, a translucent material that can transmit light, or the housing unit 11 may be only the lower one. The cover body 111 is transparent or translucent. In general, as long as the sensing unit 14 can sense the rotation of the pointer 53 through the lower cover body 111, it is not limited to the embodiment.

Referring to FIG. 5 and FIG. 6A, the corresponding relationship between the sensing elements 142 and the pointer 53 is further described in detail herein.

First, as shown in FIG. 6A, the pointer 53 has a rotation end portion 531, and an indication end portion 532 extending from the rotation end portion 531 toward the radial direction of the rotation end portion 531. The rotation end portion 531 is located at the axial center when the pointer 53 is rotated, and the indication end portion 532 moves along a circular closed track C as the pointer 53 rotates. Moreover, the three sensing elements 142 respectively correspond to three sensing positions P on the surface 52 of the meter head 5, and the sensing positions P are all located within the closed track C and distributed in the rotating path of the pointer 53. on. More specifically, the sensing positions P are distributed around the rotation end portion 531 of the pointer 53, and are staggered with each other in the radial direction of the rotation end portion 531, in other words, the pointer 53 is in the process of rotation. Only one sensing position P is passed one by one, and two or more sensing positions P are not simultaneously reached. It should be noted that the positional correspondence between the sensing elements 142 and the pointers 53 is not limited to the embodiment, and specifically, the relative positions of the sensing elements 142 and the pointers 53 The relationship can be implemented as long as the pointer 53 can pass through each of the sensing positions P one by one during the rotation of a full circle. For example, FIG. 6B shows the sensing position P relative to the pointer 53. A feasible distribution method.

Referring to FIG. 2, FIG. 5 and FIG. 6A, in the embodiment, when the control circuit 141 determines that the pointer 53 reaches the sensing position P corresponding to the sensing component 142 through each sensing component 142, The control circuit 141 outputs a pair of sensing signals to the sensing element 142 to the processing unit 15. For convenience of description, the three sensing elements 142 are respectively used as a first sensing element 142A, a second sensing element 142B and a third sensing element 142C as shown in FIG. 2 and FIG. And the three sensing positions P are respectively taken as a first sensing position P1 of the first sensing element 142A in FIG. 6 , a second sensing position P2 of the second sensing element 142B, and a Corresponding to the third sensing position P3 of the third sensing element 142C. More specifically, when the control circuit 141 determines that the pointer 53 reaches the first sensing position P1 by the first sensing component 142A, it outputs a pair of first sensing signals that should be the first sensing component 142A. To the processing unit 15. On the other hand, when the control circuit 141 determines that the pointer 53 reaches the second sensing position P2 by the second sensing component 142B, it outputs a pair of second sensing signals corresponding to the second sensing component 142B to The processing unit 15. On the other hand, when the control circuit 141 determines that the pointer 53 reaches the third sensing position P3 by the third sensing component 142C, it outputs a pair of third sensing signals that should be the third sensing component 142C. To the processing unit 15.

The processing unit 15 determines the direction and the number of turns of the pointer 53 according to the result sensed by the sensing unit 14. Specifically, the processing unit 15 determines the direction in which the pointer 53 rotates in accordance with the order in which the sensing signals are received. For example, if the processing unit 15 sequentially receives the first sensing signal, the second sensing signal, and the third sensing signal, the pointer 53 is sequentially passed. The first sensing position P1, the second sensing position P2 and the third sensing position P3, therefore, the processing unit 15 can determine that the direction in which the pointer 53 rotates is clockwise (herein the embodiment) In a first direction, it is added that if the processing unit 15 sequentially receives the second, third, and first sensing signals, or sequentially receives the third and first And the second sensing signal, the processing unit 15 also determines that the direction in which the pointer 53 rotates is the first direction. On the other hand, if the processing unit 15 sequentially receives the third sensing signal, the second sensing signal, and the first sensing signal, the pointer 53 sequentially passes the third sense. The measurement position P3, the second sensing position P2, and the first sensing position P1, therefore, the processing unit 15 can determine that the direction in which the pointer 53 rotates is a counterclockwise direction (here as a first embodiment in this embodiment) In the second direction, the processing unit 15 sequentially receives the second, first, and third sensing signals, or sequentially receives the first, third, and second senses. When the signal is measured, the processing unit 15 also determines that the direction in which the pointer 53 rotates is the second direction. It is to be noted that the processing unit 15 of the embodiment can determine the direction in which the pointer 53 rotates according to the result sensed by the sensing unit 14 by the relative positional relationship between the sensing elements 142 and the pointer 53. .

Moreover, on the premise that the processing unit 15 determines that the rotation direction of the pointer 53 is constant (for example, the first direction), the processing unit 15 receives the first feeling after the start time point according to itself. The number of times of the measurement signal, the second sensing signal, and/or the third sensing signal is used to determine the cumulative number of turns of the pointer 53. The starting time point may be, for example, a starting point in a billing cycle (for example, the first day of the current month), but is not limited thereto. For example, if the processing unit 15 receives the first sensing signal ten times after the starting time point, it means that the hour hand passes through the first sensing position P1 ten times after the starting time point. Therefore, the unit will judge that the pointer 53 has been rotated ten times after the start time point.

Moreover, when the processing unit 15 determines that a first condition is met, the processing unit 15 generates a cumulative amount according to the number of rotations accumulated by the pointer 53 during a statistical period, and uses the cumulative amount via the communication unit 13 Output to a cloud server. In this embodiment, the first condition includes, for example, the direction in which the pointer 53 rotates for the first direction during the statistical period, and the current time reaches a predetermined time, but is not limited thereto. Specifically, the predetermined time may be, for example, an end time point in the charging period (for example, the last day of the current month), and the statistical period is, for example, from the starting time point to the ending time point. During the period, but not limited to this. Moreover, in the embodiment, the meter head 5 is exemplified by a water meter head. Therefore, the cumulative amount is, for example, a cumulative water consumption in the embodiment. In addition, the cloud server can be, for example, a tap water. The water fee calculation server of the supply organization, but not limited to this.

In addition, when the processing unit 15 determines that a second condition is met, the processing unit 15 generates an alert notification, and outputs the alert notification to the cloud server via the communication unit 13. In this embodiment, the second condition includes, for example, the direction in which the pointer 53 rotates is opposite to the second direction of the first direction, that is, the abnormality of the pointer 53 of the meter head 5 is reversed, but This is limited.

It should be noted that, in this embodiment, the processing unit 15 and the communication unit 13 are jointly implemented as another circuit board independent of the sensing unit 14, and are located on the substrate 113 as shown in FIG. Between the upper cover 112 and the upper cover 112. In addition, the meter monitoring device 1 of the present embodiment operates, for example, through battery power. However, in other embodiments, the meter monitoring device 1 can also be operated by, for example, commercial power or solar power, instead of the embodiment. Limited. Moreover, the meter monitoring device 1 can selectively electrically connect to a display screen, or further include the display screen to output the cumulative number of turns currently determined by the processing unit 15 by the display screen and/or The warning notice.

In summary, the head monitoring device 1 of the present embodiment can determine that the pointer 53 is rotated according to the result sensed by the sensing unit 14 by the relative positional relationship between the sensing elements 142 and the pointer 53. The direction and the number of turns, and the effect of automatically reading the meter on the head 5 is achieved, so that the meter reading is not required in a laborious and time-consuming manner, so the purpose of the novel can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Header monitoring device  11‧‧‧Sheet unit  111‧‧‧ Lower cover  112‧‧‧Upper cover  113‧‧‧Substrate  114‧‧‧ accommodating space  115‧‧‧ first side  116‧‧‧ second side  117‧‧ ‧ chute  12‧‧‧Connecting parts  13‧‧‧Communication unit  14‧‧‧Sensor unit  141‧‧‧Control circuit  142‧‧‧Sensor components  142A‧‧‧First sensing element  142B‧‧‧Second sensing element  142C‧‧‧ Third sensing element  15‧‧‧Processing unit  D‧‧‧ Displacement direction  R‧‧‧Rotation direction  5‧‧‧ head  51‧‧‧Ontology  52‧‧‧ Surface  53‧‧‧ pointer  531‧‧‧Rotating end  532‧‧‧Indicating end  C‧‧‧Closed track  P‧‧‧Sensing position  P1‧‧‧First sensing position  P2‧‧‧Second sensing position  P3‧‧‧ third sensing position  

Other features and effects of the present invention will be apparent from the following description of the drawings, in which:  1 is a perspective exploded view, exemplarily showing an embodiment of the novel meter monitoring device and a meter;  2 is a block diagram schematically showing the hardware block connection relationship of the embodiment;  3 is another perspective exploded view, exemplarily showing a housing unit and a sensing unit of the embodiment;  4 is a schematic diagram of an incomplete bottom side, exemplarily showing the manner in which the sensing unit moves relative to a substrate;  5 is a schematic diagram of an incomplete top side, exemplarily showing that a plurality of sensing elements of the sensing unit and a pointer of the head correspond to each other in position; and  FIG. 6 (composed of FIGS. 6A and 6B) is a schematic diagram exemplarily showing the relative positional relationship between the plurality of sensing positions corresponding to the sensing elements and the pointer.  

Claims (12)

A meter monitoring device adapted to be coupled to a meter head, the head comprising a pointer, the meter monitoring device comprising:  a sensing unit includes at least three sensing elements respectively corresponding to a plurality of sensing positions distributed on a rotating path of the pointer for sensing the rotation of the pointer;  A processing unit electrically connects the sensing unit, and determines a direction and a number of turns of the pointer according to a result sensed by the sensing unit.   The meter monitoring device of claim 1, the head further comprising a surface for the pointer; wherein the sensing elements are adapted to be spaced apart from the surface of the meter. The head monitoring device of claim 2, wherein the pointer has a rotation end located at an axis of rotation of the pointer, and an indication end extending radially toward the rotation end and moving along a closed trajectory And wherein the sensing locations are adapted to be distributed around the rotating end of the pointer and staggered in a radial direction of the rotating end, and the sensing locations are adapted to be located within the closed trajectory. The head monitoring device of claim 1, the head further comprising a body; the head monitoring device further comprising a housing unit for the sensing unit, the housing unit and the body shape of the head Suitably adapted to be coupled to the body. The head monitoring device of claim 4, wherein the housing unit is hollow and at least partially permeable to light, and the sensing unit is disposed in the housing unit. The meter monitoring device of claim 4, wherein the sensing unit is movably disposed in the housing unit. The head monitoring device of claim 6, wherein the housing unit comprises a substrate, a sliding slot is formed on the substrate, and the sensing unit is disposed on the substrate and can be along the substrate The extending direction of the chute reciprocates. The meter monitoring device of claim 7, further comprising a connecting member that passes through the sensing unit and the sliding slot, and the connecting member can be along the sliding slot of the sensing unit with respect to the substrate The extending direction reciprocates, and the sensing unit can pivot about the connecting member. The head monitoring device of claim 7, the housing unit further comprising a lower cover body adapted to engage with the body shape of the head, and a lower cover body combined with the lower cover body The lower cover body cooperates with the upper cover body defining an accommodating space, the substrate is disposed in the accommodating space, and the sensing unit is located between the substrate and the lower cover body. The header monitoring device of claim 1, further comprising a communication unit electrically connected to the processing unit, wherein when the processing unit determines that a first condition is met, the processing unit is based on the pointer within a statistical period The accumulated number of turns generates a cumulative amount, and the accumulated amount is output to the cloud server via the communication unit, the first condition including the direction in which the pointer rotates is constant in a first direction during the statistical period and the current The time reaches a predetermined time, and when the processing unit determines that a second condition is met, the processing unit generates an alert notification and outputs the alert notification to the cloud server via the communication unit, the second condition including the The direction in which the pointer rotates is a second direction opposite to the first direction. The meter monitoring device of claim 1, wherein the sensing unit further comprises a control circuit electrically connected to the sensing elements, and the control circuit determines, by each sensing element, that the pointer reaches the sensing When the component corresponds to the sensing position, the control circuit outputs a pair of sensing signals corresponding to the sensing component to the processing unit, and the processing unit determines that the pointer rotates according to the order in which the sensing signals are received. direction. The head monitoring device of claim 1, wherein the head further comprises a body and a surface for the pointer, and the pointer has a rotation end located at an axis of the pointer when rotating, and An indication end of the rotation end extending radially and moving along a closed trajectory; wherein:  The meter monitoring device further includes a housing unit, a connecting member, and a communication unit electrically connected to the processing unit;  At least part of the housing unit is a light transmissive material, and the housing unit comprises a lower cover body, an upper cover body and a base plate, and the lower cover body is adapted to be coupled with the body shape of the watch head. The upper cover body is combined with the lower cover body and cooperates with the lower cover body to define an accommodating space, the substrate is disposed in the accommodating space, and a sliding groove is formed on the substrate;  The connecting member penetrates the sensing unit and the sliding slot, and can reciprocate along the extending direction of the sliding slot with respect to the substrate together with the sensing unit;  The sensing unit further includes a control circuit electrically connected to the sensing components, and the control circuit outputs when the control circuit determines that the pointer reaches the sensing position corresponding to the sensing component through each sensing component. a pair of sensing signals of the sensing component to the processing unit, and the sensing unit is disposed in the accommodating space and located between the substrate and the lower cover body, and can be axially centered on the connecting component Rotating, and the sensing elements are adapted to be spaced apart from the surface of the meter head, and the sensing locations corresponding to the sensing elements are adapted to be distributed around the rotating end of the pointer And staggered in the radial direction of the rotating end portion, and the sensing positions are adapted to be located in the closed track;  The processing unit determines the direction in which the pointer rotates according to the order in which the sensing signals are received, and when the processing unit determines that a first condition is met, the processing unit accumulates according to the pointer during a statistical period. The lap number generates a cumulative amount, and the accumulated amount is output to the cloud server via the communication unit, the first condition includes that the direction in which the pointer rotates is always a first direction during the statistical period and the current time reaches one a predetermined time, and when the processing unit determines that a second condition is met, the processing unit generates an alert notification and outputs the alert notification to the cloud server via the communication unit, the second condition including the pointer rotating The direction is a second direction opposite to the first direction.