Weight measuring device

Abstract

To provide a weight measurement apparatus capable of transmitting information on measured weight in real time when measuring weight and capable of reducing power consumption.SOLUTION: A weight measurement system 100 comprises a weight measurement apparatus 110 and a communication relay apparatus 130. The weight measurement apparatus 110 is placed along the bottom surface of a placement box, while the communication relay apparatus 130 is held by a delivery person H for home delivery. When the delivery person H comes to deliver a package L, the weight measurement apparatus 110 detects the delivery person H. The weight measurement apparatus 110 prepares for weight measurement using the detection of the delivery person H as weight measuring start information. After the weight measurement apparatus 110 measures the weight of the package L, the weight measurement apparatus transmits weight measurement information to the communication relay apparatus 130 held by the delivery person H using power-saving wireless communication. When the communication relay apparatus 130 of the delivery person H acquires the weight measurement information, the communication relay apparatus transmits the weight measurement information to a predetermined communication apparatus using mobile phone communication, and provides notification that the delivery has been completed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a weight measuring device, and more particularly to a device that notifies a weight measurement. [Background technology]

[0002] A conventional weight measurement device will be described using a weight measurement mat 2b shown in Figure 9. The weight measurement mat 2b is a general-purpose weight measurement means that can be used for inventory management. The weight measurement mat 2b, a server 3, and a terminal device 5 are communicably connected to each other via a network 4 such as the Internet. The server includes an order request receiving unit that receives an order request for each product sent from the terminal device of the inventory manager of that product, and a product ordering unit that, when the order request receiving unit receives the order request for that product, places an order for that product with a supplier of that product stored in a memory unit. This provides a general-purpose weight measurement means that can be used for inventory management, and an inventory management system that includes the weight measurement means.

[0003] Here, the weight measurement mat 2b has a portable flat panel form that can be used as an independent weight measurement means, and is equipped with a mat control unit 22 that supports inventory management of items while connecting with external information devices via a communication network, a mat communication unit 21 that mediates data exchange between the external communication network and the mat control unit 22, and a weight sensor 24 that can output the weight measurement value of the item placed on it to the mat control unit 22, and the flat panel form has a two-dimensional shape that can be aligned side by side without any gaps, and the weight of items of any size and shape placed on the top surface formed across one or more flat panel forms is tallied and fluctuations are tracked by the information device to support inventory management.

[0004] The mat control unit 22 acquires measurement data of the product weight from the weight sensor 24 at the measurement frequency set by the measurement frequency setting value 231 (e.g., once per hour) and transmits the acquired measurement data along with ID information unique to each mat to the server 3 identified by the communication destination IP address setting value 232. The mat control unit 22 may also determine the remaining charge of the battery housed in the battery housing 27 based on the voltage at a predetermined frequency (e.g., once per day) and transmit the remaining charge information of the battery along with ID information to the server 3. The mat control unit 22 may also connect to the server 3 at a predetermined frequency (e.g., once per day) and correct the clock in the weight measurement mat 2a based on the time information of the clock in the server 3, and check the latest firmware on the server 3. The mat control unit 22 may also enter a sleep mode in which it reduces current consumption to, for example, 500 μAh or less when not operating as described above. This allows stable operation without any problems for more than a year, even when using the battery housed in the battery housing 27 as a power source. The mat communication unit 21 is a communication interface between the weight measurement mat 2a and the network 4. In this embodiment, the mat communication unit 21 can be connected to the network 4 via wireless communication, and transmits and receives information between the weight measurement mat 2a and the server 3. Examples of wireless communication standards that may be used include Wi-Fi, LTE / 5G, Cat.M1, and NB-IoT. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-008331 Summary of the Invention [Problem to be solved by the invention]

[0006] The aforementioned weight measurement mat 2b has the following points that need to be improved. The weight measurement mat 2b measures weight at a predetermined time and transmits the measured weight. Therefore, it does not transmit the measured weight when the weight changes, for example, when an item is brought in or taken out, and there is an issue that needs to be improved: it does not have so-called real-time capability.

[0007] Furthermore, if Wi-Fi is used to transmit the measured weight, the communication environment must have a Wi-Fi network already established. Furthermore, if LTE such as LTE / 5G, Cat. M1, or NB-IoT is used, the communication environment must be able to receive LTE signals. In other words, the placement of the weight measurement mat 2b is limited, which is an area that needs improvement.

[0008] Therefore, the present invention aims to provide a weight measuring device that can measure and transmit the weight of an object to be measured in real time when the weight of the object to be measured changes and measurement is necessary, and that can reduce power consumption by not performing measurements or communications unless necessary. [Effects of the Invention]

[0009] The means for solving the problems in the present invention and the effects of the invention are as follows.

[0010] The weight measuring device of the present invention comprises a human detection unit that detects humans, a weight measurement unit that measures the weight of a measurement object placed on a measurement object placement unit, a transmission unit that transmits measurement object detection information generated based on the weight of the measurement object measured by the measurement object, and a control unit that, when the human detection unit detects the human, starts measuring the weight in the weight measurement unit, generates the measurement object detection information when the weight measurement unit measures the weight, terminates measuring the weight in the measurement object weight measurement unit after the weight measurement is measured in the weight measurement unit, and transmits the generated measurement object detection information to a specified communication device via the transmission unit.

[0011] This allows information about the measured weight to be transmitted in real time when the weight of the object to be measured is measured, and also reduces power consumption.

[0012] The weight measuring device of the present invention comprises a weight measuring unit that measures the weight of a measurement object placed on a measurement object placement unit, a weight differential detection unit that detects a differential change in weight that occurs when the measurement object is placed on the measurement object placement unit, a transmission unit that transmits measurement object detection information generated based on the weight of the measurement object measured by the measurement object, and a control unit that starts weight measurement in the weight measuring unit when the weight change detection unit detects the differential change in weight, generates the measurement object detection information when the weight measuring unit measures the weight, terminates weight measurement in the measurement object weight measuring unit after the weight is measured in the weight measuring unit, and transmits the generated measurement object detection information to a specified communication device via the transmission unit.

[0013] This allows information about the measured weight to be transmitted in real time when the weight of the object to be measured is measured, and also reduces power consumption.

[0014] In the weight measuring device of the present invention, the control unit is a communication relay device that transmits the measurement object detection information to the specified communication device, and is characterized in that it transmits the measurement object detection information to something present in the surrounding area.

[0015] This allows information about the measured weight to be transmitted without being limited by the communication environment.

[0016] In the weight measuring device according to the present invention, the transmitting unit transmits the measurement object detection information to the communication relay device carried by the person detected by the person detecting unit.

[0017] This allows information about the measured weight to be transmitted without being limited by the communication environment, and also reduces power consumption.

[0018] In the weight measuring device according to the present invention, the transmitting unit transmits the measurement object detection information using a low-power radio.

[0019] This allows information about the measured weight to be transmitted without being limited by the communication environment, and also reduces power consumption.

[0020] The communication relay device of the present invention includes a power-saving wireless communication unit that receives measurement object detection information using power-saving wireless communication from a weight measuring device that measures the weight of a measurement object and transmits measurement object detection information related to the measured weight, and a communication unit that relays and transmits the received measurement object detection information to a predetermined communication device.

[0021] This allows information about the measured weight to be transmitted without being limited by the communication environment, and also reduces power consumption.

[0022] The communication relay device of the present invention is further characterized in that when the power-saving wireless communication unit receives the measurement object detection information, if the communication unit is in a state where it cannot relay and transmit the received measurement object detection information, it temporarily stores the received measurement object detection information, and when the communication unit is in a state where it can relay and transmit the received measurement object detection information, it relays and transmits the temporarily stored measurement object detection information to the communication device.

[0023] This allows information about the measured weight to be transmitted without being limited by the communication environment, and also reduces power consumption.

[0024] A physical quantity measurement system according to the present invention is a physical quantity measurement system that measures the physical quantity using a physical quantity detection device having a human detection unit that detects a human, a measurement unit that measures a predetermined physical quantity related to a measurement object, and a power-saving transmission unit that transmits measurement object physical quantity information generated based on the physical quantity using power-saving wireless communication, and a power-saving wireless communication unit that receives the measurement object detection information using power-saving wireless communication, and a communication relay device having a communication unit that relays and transmits the received measurement object detection information to a predetermined communication device, wherein when the human detection unit detects the human, the physical quantity detection device starts measuring the physical quantity in the measurement unit, and relays the received measurement object detection information to a predetermined communication device. When the physical quantity is measured in the measurement unit, the measurement of the physical quantity of the measurement object is terminated and the generated physical quantity information of the measurement object is transmitted to the communication relay device, and when the power-saving wireless communication unit receives the measurement object detection information, if the communication unit is not in a state where it can relay-transmit the received measurement object detection information, the communication relay device temporarily stores the received measurement object detection information, and when the communication unit becomes in a state where it can relay-transmit the received measurement object detection information, the communication relay device relays the temporarily stored measurement object detection information to the communication device.

[0025] This allows information about physical quantities to be transmitted without being limited by the communication environment, and also reduces power consumption. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a diagram showing a weight measurement system 100 having a weight measurement device 110 which is an embodiment of the weight measurement device according to the present invention. [Figure 2] FIG. 2 is a perspective view of a weight measuring device 110. [Figure 3] FIG. 2 is a bottom view of the weight measuring device 110. [Figure 4] FIG. 2 is a diagram illustrating a hardware configuration of a control unit 115. [Figure 5]FIG. 2 is a diagram illustrating a hardware configuration of a communication relay device 130. [Figure 6] 10 is a flowchart showing a weight measurement process. [Figure 7] 10 is a flowchart showing a communication relay process. [Figure 8] FIG. 1 is a diagram showing a conventional weight measuring device. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Example]

[0028] The weight measuring device according to the present invention will be described by taking a weight measuring device 110 as an example of one embodiment.

[0029] 1. Configuration of weight measurement system 100 1, a weight measurement system 100 measures the weight of a predetermined object using a weight measurement device 110, and transmits information about the measured weight from the weight measurement device 110 via a predetermined communication relay device. The weight measurement system 100 can be used, for example, in a delivery system that uses a so-called delivery box.

[0030] The weight measurement system 100 includes a weight measurement device 110 and a communication relay device 130. The weight measurement device 110 is placed along the bottom surface of a delivery box, while the communication relay device 130 is held by a home delivery person H. When the delivery person H comes to deliver a package L, which is the measurement target, the weight measurement device 110 detects the delivery person H. The weight measurement device 110 uses the detection of the delivery person H as weight measurement start information and begins preparations for weight measurement. After measuring the weight of the package L, the weight measurement device 110 transmits the weight measurement information to the communication relay device 130 held by the delivery person H using low-power wireless communication. When the communication relay device 130 of the delivery person H acquires the weight measurement information, it transmits the weight measurement information to a predetermined communication device using mobile phone communication to notify that the delivery has been completed.

[0031] 1. Configuration of weight measuring device 110 The configuration of the weight measuring device 110 will be described with reference to Fig. 2. Fig. 2 shows a perspective view of the weight measuring device 110. The weight measuring device 110 has a weight measuring unit 111 (not shown), a human detection unit 113, a control unit 115, and a power supply unit 117.

[0032] The weight measurement unit 111 has a measurement object placement unit 111a and a weight measurement unit 111b (see FIG. 3). The measurement object placement unit 111a is formed of a flat surface of a predetermined size on which a baggage L (measurement object) to be measured can be stably placed. In the weight measurement device 110 of FIG. 2, the measurement object placement unit 111a is formed as a part of a housing unit C110 that houses the control unit 115 and the like in its internal space.

[0033] FIG. 3 shows the weight measuring device 110 as viewed from the bottom side. The weight measuring unit 111b is a so-called weight sensor that detects the weight of the luggage L placed on the measurement object placement unit 111a (see FIG. 2). The weight measuring unit 111b is placed at a predetermined position on the measurement object placement unit 111a and measures the weight of the luggage L. The weight measuring unit 111b has, for example, a strain sensor and measures the strain of the measurement object placement unit 111a. When the weight measuring unit 111b detects the weight of the luggage L, it transmits the detected weight information to the control unit 115. Note that the strain sensor tends to consume a lot of power because it uses an amplifier circuit and an AD converter with high-precision resolution.

[0034] When the human detection unit 113 detects a human, it transmits weight measurement start information to the control unit 115, instructing the start of weight measurement. The human detection unit 113 is, for example, a pyroelectric sensor. The pyroelectric sensor transmits the weight measurement start information when it acquires thermal energy, i.e., infrared rays, emitted by a human. When a pyroelectric sensor is used as the human detection unit 113, as shown in FIG. 2, the human detection unit 113 is placed in a position where it can acquire infrared rays irradiated by a person from outside the housing unit C110.

[0035] As shown in Fig. 3, the control unit 115 is disposed in the internal space of the housing C110. The configuration of the control unit 115 will be described with reference to Fig. 4. The control unit 115 has a CPU 115a, a memory 115b, a power-saving wireless communication unit 115c, an information acquisition interface 115d, and a power receiving interface 115e.

[0036] The CPU 115a performs processing based on an operating system (OS), firmware, a weight measurement program, and other applications stored in the memory 115b. The memory 115b provides a working area for the CPU 115a. The memory 115b stores and holds the OS, the weight measurement program, and other applications, as well as various data.

[0037] The power-saving wireless communication unit 115c communicates with the communication relay device 130 using BLE (Bluetooth Low Energy), which is one of the power-saving short-range wireless communication technologies, and transmits and receives various information such as measurement target detection information. Note that BLE corresponds to a part of Bluetooth (trademark), which is one of the wireless communication technologies.

[0038] The information acquisition interface 115d is connected to the weight measurement unit 111b and the human detection unit 113. The CPU 115a transmits and receives predetermined information to and from the weight measurement unit 111b and the human detection unit 113 via the information acquisition interface 115d.

[0039] The power receiving interface 115e is connected to the power supply unit 117. The power obtained via the power receiving interface 115e is supplied to each component such as the CPU 115a.

[0040] 3, the power supply unit 117 is disposed in the internal space of the housing C110. The power supply unit 117 supplies predetermined power to the human detection unit 113, the control unit 115, etc. The power supply unit 117 may be, for example, a battery.

[0041] 2. Configuration of communication relay device 130 The configuration of the communication relay device 130 will be described with reference to Fig. 5. The communication relay device 130 is a device that can execute a communication relay program that relays and transmits weight measurement information acquired from the weight measuring device 110 to a predetermined device. The communication relay device 130 may be, for example, a smartphone.

[0042] The communication relay device 130 includes a control unit 131 , a power-saving wireless communication unit 133 , a mobile phone communication unit 135 , a power supply unit 137 , and a display unit 139 .

[0043] The control unit 131 controls the operation of each component of the communication relay device 130. The control unit 131 has a CPU 131a, a memory 131b, and an interface unit 131c.

[0044] The CPU 131a performs processing based on the operating system (OS), communication relay programs, and other applications stored in the memory 131b. The memory 131b provides a working area for the CPU 131a. The memory 131b stores and holds the OS, communication relay programs, and other applications, as well as various data.

[0045] The interface unit 131c is connected via connection lines to the power-saving wireless communication unit 133, the mobile phone communication unit 135, the display unit 139, and the power supply unit 137. The CPU 131a controls the operation of each component connected via the interface unit 131c.

[0046] The power-saving wireless communication unit 133 performs power-saving wireless communication with the weight measuring device 110 using BLE.

[0047] The mobile phone communication unit 135 wirelessly communicates predetermined data using a mobile phone network.

[0048] The power supply unit 137 supplies a predetermined amount of power to the control unit 131, the power-saving wireless communication unit 133, the mobile phone communication unit 135, and the display unit 139. The power supply unit 137 is, for example, a rechargeable lithium-ion battery.

[0049] The display unit 139 displays predetermined information and also receives external operations as operation information via the display.

[0050] 2nd weight measurement processing The weight measurement process executed by the CPU 115a of the weight measuring device 110 based on the weight measurement program, and the communication relay process executed by the CPU 131a of the communication relay device 130 based on the communication relay program will be described with reference to the flowcharts of Figures 6 and 7, respectively.

[0051] 1.Weight measurement processing As shown in FIG. 6, when the CPU 115a of the weight measuring device 110 is turned on (S601), it supplies power to the human detection unit 113 to start human detection, and puts all components other than the human detection unit 113 into a standby state, or so-called sleep state (S603).

[0052] As a result, the CPU 115a reduces the power consumption in the weight measuring device 110. Because it is assumed that a person will be carrying the luggage L before placing it on the measurement target object placement unit 111a, such reduction in power consumption in the weight measuring device 110 can be achieved by providing power to operate the weight measurement unit 111b etc. only when a person is detected.

[0053] When the human detection unit 113 detects a human, it transmits human detection information to the control unit 115.

[0054] When CPU 115a acquires human detection information from human detection unit 113 (S605), it supplies power to weight measurement unit 111b and starts weight measurement in weight measurement unit 111b (S607).

[0055] When the luggage L is placed on the measurement target placement unit 111a, the weight measurement unit 111b measures the weight of the luggage L and transmits the measured weight of the luggage L to the control unit 115 as measured weight information.

[0056] When the CPU 115a acquires the measured weight information from the weight measurement unit 111b (S609), it generates measurement object detection information indicating that the luggage L has been placed on the measurement object placement unit 111a (S611). The CPU 115a generates the measurement object detection information including the weight of the luggage L acquired from the measured weight information, the time when the weight of the luggage L was measured, a weight measurement device ID that uniquely identifies the weight measurement device 110, etc.

[0057] The CPU 115a transmits the generated measurement target detection information via the power-saving communication unit 115c using BLE (S613).

[0058] The CPU 115a repeats the processes of steps S603 to S613 until the power is turned off (S615).

[0059] In this way, by transmitting the measurement target detection information to the communication relay device 130 using power-saving wireless communication instead of directly to a predetermined communication device, it is possible to significantly reduce power consumption due to communication compared to conventional methods.

[0060] 2.Communication relay processing As shown in FIG. 7, after the CPU 131a of the communication relay device 130 is turned on (S701), it acquires measurement object detection information via the power-saving wireless communication unit 133 (S703), and then transmits the acquired measurement object detection information to a predetermined communication device via the mobile phone communication unit 135 (S705).

[0061] The CPU 131a repeats the processes of steps S703 to S705 until the power is turned off (S707).

[0062] In this way, by having the delivery person H carry the communication relay device 130, it is possible to transmit the measurement target detection information in real time at the moment when the package L is delivered.

[0063] [Other embodiments] (1) Weight measuring unit 111b: In the first embodiment, the weight measuring unit 111b uses a strain gauge, but is not limited to the example as long as it can measure the weight of the measurement object. For example, a pressure sensor or a piezoelectric sensor may be used.

[0064] (2) Human detection unit 113: In the first embodiment, the human detection unit 113 uses a pyroelectric sensor, but is not limited to the example as long as it can detect a human. For example, it may be an optical sensor or a capacitance change sensor.

[0065] (3) Placement of human detection unit 113: In the above-mentioned Example 1, the human detection unit 113 is placed in the housing unit C110, but it may be separate from the housing unit C110 and placed at a position away from the housing unit C110 via a connecting wire.

[0066] (4) Arrangement of weight measurement unit 111: In the above-mentioned Example 1, the weight measurement unit 111 and the control unit 115 are arranged integrally in the housing unit C110, but the two may be arranged as separate entities and connected to each other via a connecting wire.

[0067] (5) Start of Weight Measurement: In the first embodiment, the weight measurement unit 111b is activated and weight measurement is initiated upon detection of a human by the human detection unit 113. However, any device capable of initiating the operation of the weight measurement unit 111b may be used. For example, instead of the human detection unit 113, a weight differential detection unit may be provided that detects a differential change in weight occurring in the weight measurement device 110 when the luggage L is placed on the measurement target object placement unit 111a. The weight differential detection unit may be, for example, a triaxial acceleration sensor. The acceleration sensor has the advantage of being able to immediately generate an interrupt signal to the control unit 115 upon detecting a gravity change exceeding a predetermined threshold in the vertical axis, i.e., in the placement direction, while also being able to operate in low-power standby mode. When the weight differential detection unit detects a differential change in weight occurring in the weight measurement device 110, it transmits weight differential change detection information to the CPU 115a of the control unit 115. When the CPU 115a acquires the weight differential change detection information, it supplies power to the weight measurement unit 111b and starts weight measurement in the weight measurement unit 111b (see S607 in FIG. 6).

[0068] Furthermore, when a transporting device such as a transport robot takes out or places a measurement object such as a baggage instead of a person, the weight measuring device may have a transporting device detection unit that detects the transporting device. In this case, the transporting device may be provided with a total power communication unit, a mobile phone line, or a communication unit capable of wireless relay.

[0069] (6) Power-saving communication unit 115c, power-saving communication unit 133: In the first embodiment, the power-saving communication unit 115c and the power-saving communication unit 133 use BLE, but are not limited to the examples as long as they can transmit measured weight information in a power-saving manner. For example, local wireless communication such as sub-gigabit communication may be used.

[0070] Furthermore, if a predetermined communication environment is secured as a wireless repeater, such as reception of Wi-Fi or a mobile phone line, a wireless communication unit using a wireless LAN or a mobile phone line may be provided. In this case, the number of communications and the communication time may be limited to save power. Furthermore, a communication method that enables "long-distance data communication" with "low current consumption" compatible with so-called LPWA (Low Power, Wide Area), such as Sigfox (registered trademark), may be used. Furthermore, wired communication such as Ethernet or MobBus may be used instead of wireless communication.

[0071] Furthermore, a power-saving wireless communication unit may be provided, and communication may be performed using different communication standards.Furthermore, in addition to the power-saving wireless communication unit, a wired communication unit such as Ethernet or MobBus may be used.

[0072] (7) Power supply unit 117: In the first embodiment described above, the power supply unit 117 of the weight measuring device 110 is a battery contained in the housing C110, but is not limited to the illustrated example as long as it can supply a predetermined amount of power. For example, it may be a constant power supply that receives power from an AC outlet. Even with such a constant power supply, power consumption can be reduced. Furthermore, the battery may be a predetermined rechargeable battery such as a button battery, a dry cell battery, or a solar cell.

[0073] (8) Measurement target detection information: In the first embodiment described above, the measurement target detection information includes the weight of the luggage L obtained from the measurement weight information, the time when the weight of the luggage L was measured, a weight measurement device ID that uniquely identifies the weight measurement device 110, etc. However, the information is not limited to the examples provided that it is generated based on the measured weight. For example, the measurement target detection information may include the increase or decrease in weight, the number of measurement targets calculated from the measured weight, etc.

[0074] (9) Transmission of measurement object detection information: In the first embodiment described above, the weight measuring device 110 detects differential changes in a person or weight and transmits measurement object detection information each time it measures the weight of a measurement object. However, the present invention is not limited to the example described above as long as it transmits measurement object detection information. For example, multiple pieces of measurement object detection information may be transmitted once a day, or five pieces of measurement object detection information may be transmitted together. When transmitting once a day, for example, after the first person detection and weight measurement of a certain day, measurement object detection information that has not been transmitted by the previous day may be transmitted together.

[0075] Furthermore, if the weight measured by the weight measurement unit 111b has not changed from the previous weight, this means that a person has simply approached or the weight of the object to be measured has changed temporarily, but the weight of the object to be measured has not changed in the end, so it is possible to not perform further communication with the communication relay device 130. This makes it possible to reduce unnecessary power consumption and communication.

[0076] (10) Communication relay device 130: In the first embodiment described above, the communication relay device 130 is a smartphone owned by the delivery person who carries the package L. However, the communication relay device 130 is not limited to the example described above as long as it can relay and transmit the measured weight information. For example, it may be a dedicated communication terminal that relays the measured weight information.

[0077] (11) Configuration of the control unit 115 of the weight measuring device 110 and the control unit 131 of the communication relay device 130: In the above-described first embodiment, the control unit 115 of the weight measuring device 110 executes the brightness acquisition process using the CPU 115a, but is not limited to the example as long as it executes the weight measurement process. For example, the weight measurement process may be executed using a dedicated logic circuit. The same applies to the control unit 131 of the communication relay device 130.

[0078] (12) Weight measurement processing, communication relay processing: In the first embodiment described above, the flowchart of FIG. 6 is shown as the weight measurement processing, and the flowchart of FIG. 7 is shown as the communication relay processing, but the present invention is not limited to these exemplary flowcharts.

[0079] (13) Usage of the weight measurement system 100: In the first embodiment described above, the weight measurement system 100 was used to confirm package delivery, but the usage is not limited to the example, as long as it transmits measured weight information. For example, the weight measurement device 110 may be placed along the bottom of a trash can, and when it detects someone coming to throw away trash, it may detect the weight of the trash can and transmit the amount of trash discarded as measured weight information. This makes it possible to confirm the amount of trash discarded, and ultimately to obtain and digitize the amount of trash reduction and the greenhouse gas emission suppression effect based on the amount of trash reduction.

[0080] In addition, when placed in a designated storage location for items such as beer, the device detects the person taking out or carrying out an item or differential changes in weight, and then detects the weight of the remaining items and transmits the weight of the remaining items and the weight of the items taken out or carried as measured weight information.

[0081] (14) Transmission of Measured Weight Information by Communication Relay Device 130: In the first embodiment described above, when communication relay device 130 acquires weight measurement information from weight measuring device 110, it transmits the acquired weight measurement information to a predetermined communication device. However, the present invention is not limited to the illustrated example, as long as it can transmit weight measurement information. For example, if weight measuring device 110 is installed in a location such as a warehouse, an underground shelter, or in the mountains, in a communication environment where communication with other communication devices is not possible via communication lines other than low-power wireless communication, such as a mobile phone line or wireless LAN communication, communication relay device 130 may temporarily store and retain weight measurement information acquired via low-power wireless communication, such as BLE, in memory 130b, etc., and transmit the weight measurement information stored and retained in memory 130b, etc. to the predetermined communication device when communication with other communication devices becomes possible. This allows weight measurement information to be transmitted and stored even in a communication environment where mobile phone lines, wireless LAN communication, etc., are not available, such as a warehouse, an underground shelter, or in the mountains. Furthermore, unless a person approaches, the weight measuring device does not perform weight measurement or periodic communication, so the weight measuring device 110 can be used for an extremely long period of time even when operated on battery power.

[0082] (15) Weight of measurement object: In the above-described first embodiment, the weight of the baggage L, which is the measurement object, is detected. However, the weight may be any predetermined physical quantity related to the measurement object, and is not limited to the example. For example, carbon dioxide concentration, temperature, humidity, displacement of geological layers, etc. may be measured as physical quantities. In this case, the accumulated data on the physical quantities may be detected by the human detection unit when a person approaches, transmitted to a communication relay device such as a smartphone carried by the person, and then transmitted from the communication relay device to a predetermined communication device such as a cloud server. Note that the physical quantities may be measured in real time when a person approaches. [Industrial Applicability]

[0083] The weight measuring device according to the present invention can be used, for example, to confirm the delivery of a package. [Explanation of symbols]

[0084] 100 Weight measurement system 110 Weight measuring device 111 Weight Measurement Section 111a Measurement object placement section 111b Weight measurement section 113 Human detection unit 115 Control Unit 115a CPU 115b memory 115c Power saving wireless communication section 115d Information Acquisition Interface 115e Power Receiving Interface 117 Power supply section 130 Communication relay device 131 Control Unit 131a CPU 131b memory 131c Interface section 133 Low-power wireless communication unit 135 Mobile Phone Communications Department 137 Power supply section 139 Display unit C110 housing H Delivery Person L Luggage

Claims

1. a human detection unit that detects a person; a weight measurement unit that measures the weight of the measurement object placed on the measurement object placement unit; a transmitting unit that transmits measurement object detection information generated based on the weight of the measurement object measured by the measurement object; a control unit that, when the human detection unit detects the human, starts measuring the weight in the weight measurement unit, and when the weight measurement unit measures the weight, generates the measurement object detection information based on the measured weight, and after the weight measurement unit measures the weight, ends the weight measurement by the weight measurement unit and transmits the generated measurement object detection information to a predetermined communication device via the transmission unit; A weight measuring device having:

2. a weight measurement unit that measures the weight of the measurement object placed on the measurement object placement unit; a weight differential detection unit that detects a differential change in weight that occurs when the measurement object is placed on the measurement object placement unit; a transmitting unit that transmits measurement object detection information generated based on the weight of the measurement object measured by the measurement object; a control unit that starts measuring the weight in the weight measurement unit when the weight differential detection unit detects the differential change in the weight, generates the measurement object detection information when the weight measurement unit measures the weight, terminates the weight measurement by the weight measurement unit after the weight measurement unit measures the weight, and transmits the generated measurement object detection information to a predetermined communication device via the transmission unit; A weight measuring device having:

3. In the weight measuring device according to claim 1, The control unit a communication relay device that transmits the measurement object detection information to the predetermined communication device, and that transmits the measurement object detection information to a surrounding device; A weight measuring device characterized by:

4. 4. The weight measuring device according to claim 3, The transmission unit transmitting the measurement target detection information to the communication relay device carried by the person detected by the person detection unit; A weight measuring device characterized by:

5. In the weight measuring device according to claim 2, The control unit a communication relay device that transmits the measurement object detection information to the predetermined communication device, and that transmits the measurement object detection information to a surrounding device; A weight measuring device characterized by:

6. A weight measuring device according to any one of claims 1 to 5, The transmission unit transmitting the measurement target detection information using a low-power radio; A weight measuring device characterized by:

7. A physical quantity measurement system for measuring the physical quantity using a communication relay device having a human detection unit that detects a human, a measurement unit that measures a predetermined physical quantity related to a measurement object, and a power-saving transmission unit that transmits measurement object physical quantity information generated based on the physical quantity using power-saving wireless communication, and a power-saving wireless communication unit that receives the measurement object physical quantity information using power-saving wireless communication, and a communication unit that relays and transmits the received measurement object physical quantity information to a predetermined communication device, The physical quantity detection device is When the human detection unit detects the human, the measurement unit starts measuring the physical quantity; When the physical quantity is measured by the measurement unit, the measurement target physical quantity information is generated; After the physical quantity is measured by the measurement unit, measurement of the physical quantity of the measurement object is terminated; transmitting the generated physical quantity information of the measurement object to the communication relay device; The communication relay device When the power-saving wireless communication unit receives the physical quantity information of the object to be measured, if the communication unit is in a state where it cannot relay and transmit the received physical quantity information of the object to be measured, the communication unit temporarily stores the received physical quantity information of the object to be measured, when the communication unit is in a state where it can relay and transmit the received physical quantity information of the measurement object, the communication unit relays and transmits the temporarily stored physical quantity information of the measurement object to the communication device; A physical quantity measurement system characterized by:

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