Measuring device

Abstract

To provide a measuring device capable of accurately measuring weight of the object.SOLUTION: Provided is a measuring device 100 including: a mounting table 102; a weight sensor 130 for measuring weight of an object 90 placed on the mounting table; and a control unit 110 for measuring the weight of the object by acquiring a first measurement value of the weight sensor when the object is lifted from the mounting table and acquiring a second measurement value of the weight sensor when the object is placed again.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a technique for a measuring device for measuring the weight of an object placed on it. [Background technology]

[0002] Conventionally, measuring devices for measuring the weight of various containers are known. For example, Japanese Patent Application Laid-Open No. 2012-021845 (Patent Document 1) discloses a body measuring device and method. According to Patent Document 1, a load cell is provided for detecting a load applied to a placement surface, and when a subject is placed on the placement surface and the load detected by the load cell becomes stable, the load is acquired as a load value. After that, when it is determined that the subject has stepped down from the placement surface, the subject's weight is calculated from the load detected by the load cell and the aforementioned acquired load value, and is displayed on a display unit.

[0003] Also, Japanese Patent Laid-Open Publication No. 5-231916 (Patent Document 2) discloses a measurement and display method for an electronic scale. According to Patent Document 2, when a load is applied simultaneously with power-on, the weight signal is balanced with the load applied immediately after power-on, and the weight signal N at that time is stored as the initial value nz in #4. When the load is removed, it is detected in #8 that N-nz=nn is greater than the specified weight X, N is balanced at the zero point, and the difference weight nn is displayed in #12 as the weight value of the load. Therefore, because the zero point is found and the measured weight is obtained after the load is removed, an accurate weight value can be obtained even if a load is applied simultaneously with power-on. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-021845 A [Patent Document 2] Japanese Patent Application Publication No. 5-231916 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a measuring device capable of accurately measuring the weight of an object. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a measuring device comprising a mounting platform, a weight sensor for measuring the weight of an object placed on the mounting platform, and a control unit for measuring the weight of the object by obtaining a first measurement value of the weight sensor when the object is lifted from the mounting platform and obtaining a second measurement value of the weight sensor when the object is placed back on the platform. Effect of the Invention

[0007] As described above, according to the present invention, a measuring device capable of accurately measuring the weight of an object is provided. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a conceptual diagram showing an outline of the operation of the measurement device according to the first embodiment. [Diagram 2] 1 is a block diagram showing a configuration of a measurement device according to a first embodiment. [Diagram 3] FIG. 4 is a diagram showing condiment information history data according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing usage history data according to the first embodiment; [Diagram 5] 4 is a flowchart showing a process of the measurement device according to the first embodiment. [Figure 6] FIG. 1 is a conceptual diagram showing a network system including a measurement device according to a first embodiment. [Figure 7] FIG. 13 is a diagram showing temperature correspondence relationship data according to the third embodiment. [Figure 8] 13 is a flowchart showing a process of a measurement device according to a fourth embodiment. [Figure 9] FIG. 13 is a block diagram showing a configuration of a server according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated. <First embodiment> <Operation overview>

[0010] As shown in Fig. 1, the measuring device 100 according to this embodiment is used by placing a measurement object on a mounting table 102 provided on the upper part of a main body 101. In this embodiment, a container 90 for storing seasonings will be described as an example of the measurement object. The measuring device 100 measures the weight of the container 90 from the previous time and the current time, thereby measuring the amount of salt, sugar, pepper, medicine, etc. ingested, used, and remaining amount by a target user.

[0011] Specifically, in this embodiment, as shown in FIG. 1, first, the power supply of the measuring device 100 is turned off with the container 90 placed therein (step S002).

[0012] When the user lifts the container 90 from the stage 102, the stage 102 is raised, an internal switch is turned OFF, and the power supply of the internal microcomputer, communication module, etc. is turned ON (step S004).

[0013] In this state, the measuring device 100 performs weight measurement using a load cell provided under the mounting table 102 (step S006).

[0014] Then, when the container 90 is placed on the mounting table 102 again, the internal switch is turned ON (step S008).

[0015] When the switch is ON and a measurement value is recorded, the microcomputer of the measuring device 100 stores the difference between that measurement value and the most recent measurement value measured when no object is placed on the measuring unit as the weight of the container 90 (step S010). The microcomputer of the measuring device 100 calculates and stores the weight of the container 90 and the amount of change in the seasonings contained therein.

[0016] The measuring device 100 transmits the weight of the container 90 and the amount of seasoning used to an application on the smartphone 300 via Bluetooth, or to a server 200 of a cloud service via WiFi (step S012). <Overall composition>

[0017] Next, the overall configuration of the measuring device 100 according to this embodiment will be described with reference to Fig. 2. The measuring device 100 according to this embodiment mainly includes a control unit 110, a load cell 130 for weight measurement, a temperature sensor 140, a speaker 150, a wireless communication module 160, an angular velocity sensor 170, a switch 180 for placement detection, a battery 190, a display element 195, and the like.

[0018] The control unit 110 includes a processor 111, a memory 112, a clock, a timer, etc. The processor 111 controls each part of the measuring device 100 by executing a program stored in the memory 112. The memory 112 stores the control program, the date and time of measurement by the load cell 130, the measurement results, identification information, etc.

[0019] For example, the memory 112 stores seasoning information history data 112A. As shown in Fig. 3, the seasoning information history data 112A stores, for each seasoning, the name of the seasoning, the identification information of the seasoning, the specific gravity of the seasoning, and the weight of the empty container 90.

[0020] Furthermore, memory 112 stores usage history data 112B of seasonings, etc. As shown in Fig. 4, usage history data 112B stores, for each measurement of the weight of container 90, a history number, the measurement date and time, the temperature (TA) when no object was placed thereon, the temperature (TB) when the switch was turned ON, the amount of seasoning used, and the remaining amount of seasoning.

[0021] 2, the load cell 130 is disposed directly below the mounting table 102 and measures the weight of the measurement object together with the mounting table 102. The load cell 130 inputs the measurement value to the control unit 110.

[0022] The temperature sensor 140 measures the temperature inside or outside the measuring device 100 and inputs the measured temperature to the control unit 110. The temperature sensor 140 may measure the temperature of the load cell 130 or the temperature in the vicinity of the load cell 130, or may measure the temperature of the mounting table 102.

[0023] The speaker 150 outputs various sounds based on audio signals input from the control unit 110.

[0024] The wireless communication module 160 transmits and receives data to and from a router, a carrier network, the Internet, an external server, and the like via a wireless antenna and the like in accordance with instructions from the control unit 110.

[0025] Angular velocity sensor 170 measures the acceleration and angular velocity in each direction and inputs the measurement results to control unit 110. Note that angular velocity sensor 170 may be any sensor capable of measuring angles, such as a three-axis acceleration sensor, a six-axis acceleration sensor, or a gyro sensor. Control unit 110 detects the attitude, inclination, vibration, and swing of measuring device 100 based on the signal from angular velocity sensor 170, and executes various processes using these as triggers.

[0026] The switch 180 is disposed directly below the mounting table 102, and inputs the result of the determination as to whether or not an object is placed on the upper surface of the mounting table 102 to the control unit 110. Based on the data from the switch 180, the control unit 110 can recognize whether or not the container 90 is in contact with the upper surface of the mounting table 102.

[0027] In this embodiment, when switch 180 is in the OFF state, that is, when the weight of container 90 is not applied to mounting table 102, control unit 110 executes weight measurement using load cell 130. Then, when the user places container 90 on the upper surface of mounting table 102, mounting table 102 presses switch 180 to transition to the ON state. That is, the weight of container 90 is applied to mounting table 102. In this embodiment, the weight of container 90 is measured in this state, and the weight when no object is placed is subtracted, and the measurement result is uploaded to server 200, smartphone 300, or the like.

[0028] The battery 190 is for supplying power to each part of the measurement device 100 such as the processor 111 and the communication module 160 .

[0029] The display element 195 is realized by an LED or a display, and emits light in accordance with a signal from the control unit 110. <Information Processing>

[0030] The following describes information processing for measuring the weight of the container 90 by the processor 111 according to this embodiment. The processor 111 executes the processing shown in FIG.

[0031] First, in the power-off state, the control unit 110, the load cell 130, the wireless communication module 160, etc. are in a sleep state. In this embodiment, the power of the measuring device 100 is turned off when a predetermined time has elapsed while the container 90 is placed on the mounting table 102, i.e., while the switch 180 is turned on. In this state, the measuring device 100 waits until the switch 180 is turned off (step S104).

[0032] When an object such as a seasoning container 90 is picked up from the placement table 102 (YES in step S102), that is, when the switch 180 is turned OFF (YES in step S102), the following process is executed. If the power is OFF (YES in step S106), the control unit 110 is started (step S108). If the power is ON, the process proceeds to step S110.

[0033] The processor 111 of the control unit 110 starts the load cell 130, measures the weight of the mounting table 102, and stores the weight in the memory 112 (step S110). That is, it executes zero point processing. After a predetermined time has elapsed, the processor 111 puts the load cell and itself into a sleep state.

[0034] The processor 111 waits until the switch 180 is pressed by the mounting table 102 again (step S114).

[0035] If switch 180 is turned ON (YES in step S112), the following process is executed. If the power is OFF (YES in step S116), control unit 110 is started (step S118). If the power is ON, proceed to step S120.

[0036] The processor 111 of the control unit 110 activates the load cell 130, measures the weight of the mounting table 102, and stores the weight in the memory 112 (step S120). That is, the weight including the target object is measured.

[0037] Processor 111 subtracts the measured weight without the object from the measured weight including the object to calculate the weight of only the object. Processor 111 adds the weight of only the seasoning container 90, i.e., the weight of only the object, to usage amount history data 112B in memory 112. Processor 111 calculates the difference between the previous weight and the current weight as the amount of seasoning used this time, and adds the calculation result to usage amount history data 112B (step S122).

[0038] Also, when the weight of an empty container is stored in the seasoning information history data 112A, the processor 111 can calculate and store the weight of only the substance inside the container by subtracting the weight of the empty container from the weight of the target object alone. Furthermore, when the specific gravity of a seasoning is stored in the seasoning information history data 112A, the processor 111 can calculate and store the volume of the substance by multiplying it by the weight of the substance alone.

[0039] In this embodiment, the processor 111 activates the wireless communication module 160 and uploads the measurement date and time, the weight of the object, the amount used, and the like, together with the identification information of the measuring device 100, to the server. In this embodiment, as shown in Fig. 6, the measuring device 100 exchanges data with the server 200 on the cloud via a router 400 and the Internet. More specifically, the wireless communication module 160 of the measuring device 100 exchanges data with the server 200 on the cloud via the router 400 and the Internet, using wireless LAN (Wi-Fi). Alternatively, the wireless communication module 160 may exchange data directly with a communication terminal such as a smartphone 300, a tablet, or a personal computer, using Bluetooth communication.

[0040] The processor 111 may upload the measurement data to the server 200 every time the weight is measured, or may store the measurement data a predetermined number of times in the memory 112 and upload it collectively to the server 200, or may store the measurement data for a predetermined period in the memory 112 and upload it collectively to the server 200. Alternatively, the measurement values ​​may be stored in the memory 112 when communication fails. <Second embodiment>

[0041] Here, if the object is picked up from platform 102 and immediately returned to platform 102, the state of platform 102 may not be stable, and weight measurement without the object placed thereon may not be completed normally. Therefore, in this embodiment, if the time for step S110 in Fig. 5 is too short, processor 111 may use the previous weight measurement value without the object placed thereon, stored in memory 112, in step S122.

[0042] Alternatively, in step S122, the processor 111 may use an average value of the weights measured most recently when no object was placed on the object. <Third embodiment>

[0043] However, since various conditions may have changed since the previous measurement when no object was placed on the device, it is preferable to have the following configuration in order to improve measurement accuracy.

[0044] In this embodiment, as shown in Fig. 7, correspondence data 112C between temperature and measured weight values ​​when no object is placed is stored in memory 112. For example, every time when no object is placed in step S110 in Fig. 5, processor 111 of control unit 110 starts load cell 130, measures the weight of mounting table 102, and stores the weight in memory 112, and also stores the correspondence between the measured value of temperature sensor 140 and the weight in correspondence data 112C.

[0045] Then, thereafter, if weight measurement is not performed normally when no object is placed on the object, i.e., after step S110 has failed, in step S120, the processor 111 of the control unit 110 activates the load cell 130, measures the weight of the object, and stores the measured value in memory 112, and also stores the measurement value of the temperature sensor 140.

[0046] Then, in step S122, processor 111 refers to correspondence data 112C to identify the weight when no object corresponding to the current temperature is placed on the table. Processor 111 then subtracts the weight when no object corresponding to the temperature is placed on the table from the measured weight value including the object in step S120 to calculate the weight of only the object.

[0047] Regardless of the success / failure of step S110, in step S110, the correspondence between the measured weight and the measured temperature is always stored in correspondence data 112C, and in step S122, the weight when no object is placed corresponding to the temperature at that time may always be used.

[0048] More preferably, processor 111 deletes old data from correspondence data 112C. For example, processor 111 may store in memory 112 the most recent correspondences between weight and temperature when a predetermined number of objects, for example, 30 objects, are not placed on the weight-temperature relationship data, and delete older correspondence data than the weight-temperature relationship data.

[0049] In the above embodiment, the correspondence data 112C is accumulated and updated by itself in step S110. However, a configuration may be adopted in which default correspondence data 112C is stored in advance in memory 112, and the data is not updated in step S110. Alternatively, correspondence data 112C for each season may be loaded in advance, and processor 111 may read a value when no object corresponding to the temperature is placed from correspondence data 112C corresponding to the current season in step S122. <Fourth embodiment>

[0050] Another problem is that if another object is placed on the seasoning container 90 when it is picked up from the placement table 102, the amount used cannot be measured correctly. Or, if the seasoning container 90 is filled with seasoning or if the seasoning is replaced with a new container 90, the amount used cannot be measured correctly. The measuring device 100 according to this embodiment can handle such situations.

[0051] More specifically, in step S122 in FIG. 5, processor 111 of control unit 110 executes the process shown in FIG.

[0052] Processor 111 subtracts the measured weight when no object is placed on it from the measured weight including the object, such as seasoning container 90, to calculate the weight of only the object (step S152).

[0053] Processor 111 determines whether the weight of the object has increased by a predetermined value or more from the previous value (step S154). If the weight has increased by a predetermined value or more from the previous value (YES in step S154), processor 111 adds only the weight of the object to usage amount history data 112B in memory 112 together with an error flag (step S156). In other words, it is not used as valid data.

[0054] Then, in step S122 of FIG. 5, the next time an object is lifted, processor 111 subtracts the measured weight when no object is placed from the measured weight including the object to calculate the weight of only the object (step S162).

[0055] Processor 111 determines whether the weight has decreased within a normal range, i.e., within a predetermined value, from the value before last (step S164). If the weight has decreased within a normal range from the value before last (YES in step S164), processor 111 adds the weight of only the current object to usage amount history data 112B in memory 112 as normal data (step S166). Processor 111 calculates the difference from the weight before last as the current usage amount, calculates half the difference as the previous usage amount, calculates the same amount as the current usage amount, adds the calculation result to usage amount history data 112B, or transmits the calculation result to server 200 (step S168).

[0056] If the weight has not decreased within the normal range from the value before last (NO in step S164), processor 111 determines whether the weight has decreased within the normal range from the previous value (step S172). If the weight has decreased within the normal range from the previous value (YES in step S172), processor 111 determines that seasoning was filled at the time of the previous measurement (step S174).

[0057] Processor 111 adds the weight of only the current object to usage history data 112B in memory 112 as normal data (step S176). Processor 111 calculates the difference from the previous weight as the current usage, adds it to usage history data 112B, and transmits the calculation result to server 200 (step S178).

[0058] If the weight has not decreased within the normal range from the previous value (NO in step S172), the processor 111 outputs an error sound from the speaker 150 and / or transmits error information to the server 200 or the smartphone 300 via the communication module 160 (step S179).

[0059] If the weight has not increased by a predetermined value or more from the previous value (NO in step S154), processor 111 adds the weight of only the current object to usage amount history data 112B in memory 112 (step S181). Processor 111 calculates the difference from the previous weight as the current usage, adds the calculation result to usage amount history data 112B, and transmits the calculation result to server 200 (step S182).

[0060] Then, in step S122 of FIG. 5, the next time an object is lifted, processor 111 subtracts the measured weight when no object is placed from the measured weight including the object to calculate the weight of only the object (step S183).

[0061] Processor 111 judges whether the weight has decreased within a normal range from the value before last (step S184). If the weight has decreased within a normal range from the value before last (YES in step S184), processor 111 judges whether the weight has decreased within a normal range from the previous value (step S185). If the weight has decreased within a normal range from the previous value (YES in step S184), processor 111 adds the weight of only the current object to usage amount history data 112B in memory 112 as normal data (step S186). Processor 111 calculates the difference from the previous weight as the current usage, adds the calculation result to usage amount history data 112B, and transmits the calculation result to server 200 (step S188).

[0062] If the weight has not decreased within the normal range from the previous value (NO in step S172), processor 111 sets an error flag to the history data of the previous usage amount and weight (step S188).

[0063] If the weight has not decreased from the value before last (NO in step S184), processor 111 adds the weight of only the current object to usage amount history data 112B in memory 112 (step S190). Processor 111 calculates the difference from the previous weight as the usage amount, adds it to usage amount history data 112B, or transmits the calculation result to server 200 (step S192). <Fifth embodiment>

[0064] In the above embodiment, in steps S156 and S160, processor 111 accumulates the weight of container 90 together with the error flag in memory 112, but processor 111 may be configured not to accumulate the weight at the time of the error in usage amount history data 112B. That is, processor 111 may be configured not to execute steps S156 and S160. In other words, the weight at the time of the error is not used as valid data. Sixth embodiment

[0065] In the above embodiment, the measuring device 100 calculates the amount of seasoning used, but some or all of these functions may be installed in the server 200 or the smartphone 300. For example, as shown in Fig. 9, the CPU 210 of the server 200 executes the process shown in Fig. 8 according to the program in the memory 220. In this embodiment, the memory 220 stores the usage amount history data 112B for each measuring device 100.

[0066] CPU 210 receives the measured weight including the object and the measured weight when no object is placed via communication interface 260, and calculates the weight of only the object by subtracting the measured weight when no object is placed from the measured weight including the object (step S152).

[0067] CPU 210 determines whether the weight has increased from the previous value (step S154). If the weight has increased from the previous value (YES in step S154), CPU 210 adds the weight of only the object together with an error flag to usage amount history data 112B in memory 220 (step S154).

[0068] The next time an object is lifted in measuring device 100, CPU 210 receives from measuring device 100 via communication interface 260 the measured weight including the object and the measured weight when no object is placed, and calculates the weight of the object alone by subtracting the measured weight when no object is placed from the measured weight including the object (step S162).

[0069] CPU 210 judges whether the weight has decreased within a normal range, i.e., within a predetermined value, from the value before last (step S164). If the weight has decreased within a normal range from the value before last (YES in step S164), CPU 210 adds the weight of only the current object as normal data to usage history data 112B in memory 220 (step S166). CPU 210 calculates the difference from the weight before last as the current usage, or calculates half of this as the previous usage and the current usage, and adds them to usage history data 112B (step S168).

[0070] If the weight has not decreased within the normal range from the value before last (NO in step S164), CPU 210 determines whether the weight has decreased within the normal range from the previous value (step S172). If the weight has decreased within the normal range from the previous value (YES in step S172), CPU 210 determines that seasoning was filled at the time of the previous measurement (step S174).

[0071] CPU 210 adds the weight of only the current object to usage history data 112B in memory 220 as normal data (step S176). CPU 210 calculates the difference from the previous weight as the current usage and adds it to usage history data 112B (step S178).

[0072] If the weight has not decreased within the normal range from the previous value (NO in step S172), the CPU 210 may transmit error information to a terminal such as the smartphone 300 corresponding to the measuring device 100 via the communication interface 260 (step S190).

[0073] If the weight has not increased from the previous value (NO in step S154), CPU 210 determines whether the weight has decreased significantly from the previous value, that is, by a second predetermined value or more (step S158). If the weight has decreased significantly from the previous value (YES in step S158), CPU 210 adds the weight of only the object to usage amount history data 112B in memory 220 together with a decrease error flag (step S160). CPU 210 proceeds to the process of step S162.

[0074] If the weight is not significantly less than the previous value (NO in step S158), CPU 210 adds only the weight of the current object to usage history data 112B in memory 220 as normal data (step S180). CPU 210 calculates the difference from the previous weight as the usage amount and adds it to usage history data 112B (step S182).

[0075] Naturally, such processing may be executed by a CPU of a communication terminal such as the smartphone 300 instead of the CPU 210 of the server 200. <Summary>

[0076] In the above embodiment, a measuring device is provided that includes a mounting platform, a weight sensor for measuring the weight of an object placed on the mounting platform, and a control unit for measuring the weight of the object by obtaining a first measurement value of the weight sensor when the object is lifted from the mounting platform and obtaining a second measurement value of the weight sensor when the object is placed back down.

[0077] Preferably, the control unit determines the amount of change in the substance within the object from the previous weight of the object and the current weight of the object.

[0078] Preferably, when the object is lifted from the platform and then placed back down before the measurement of the first measurement value of the weight sensor is completed, the control unit uses the previous first measurement value.

[0079] Preferably, the measurement device further includes a temperature sensor. When the object is lifted from the placement platform and then placed back down before the measurement of the first measurement value of the weight sensor is completed, the control unit determines the current first measurement value based on the temperature measured when the object was lifted previously, the first measurement value at that time, and the current temperature.

[0080] Preferably, when the currently measured weight of the object is greater than the previously measured weight, the control unit does not use the currently measured weight as valid data.

[0081] Preferably, when the previously measured weight of the object is greater than the weight measured two times before and the current measured weight returns to a value close to the previously measured weight, the control unit does not use the previously measured weight as valid data.

[0082] Preferably, when the previously measured weight of the object is less than the weight measured before last by a predetermined amount or more and the current measured weight has returned to a value close to the weight measured before last, the control unit does not use the previously measured weight as valid data.

[0083] Preferably, the control unit determines that the object is filled with a substance when the current measured weight of the object is greater than the previously measured weight.

[0084] Preferably, the control unit determines that a substance has been filled into the object if the previously measured weight of the object is greater than the weight measured two times before and if the current measured weight is close to the previously measured weight.

[0085] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0086] 90: Container 100: Measuring device 101: Main unit 102: Placement table 110: Control unit 111: Processor 112: Memory 112A: Seasoning information history data 112B: Usage history data 112C: Correspondence data 130: Load cell 140: Temperature sensor 160: Wireless communication module 170: 6-axis sensor 180: Switch 190: Battery 195: Display element 200 :Server 210: CPU 220: Memory 260: Communication interface 300: Smartphone 400: Router

Claims

1. A mounting table; a weight sensor for measuring a weight of an object placed on the platform; a control unit for measuring the weight of the object by obtaining a first measurement value of the weight sensor when the object is lifted from the placement table, and obtaining a second measurement value of the weight sensor when the object is placed back down.

2. The measurement device according to claim 1 , wherein the control unit determines an amount of change in the substance in the object from a previous weight of the object and a current weight of the object.

3. 2. The measuring device according to claim 1, wherein the control unit uses a previous first measurement value when the object is lifted from the placement table and then placed back down before the weight sensor has completed measuring the first measurement value.

4. Further comprising a temperature sensor; The measuring device of claim 3, wherein when the object is lifted from the placement table and then placed back down before the weight sensor has completed measuring the first measurement value, the control unit determines the current first measurement value based on the temperature measured when the object was lifted previously, the first measurement value at that time, and the current temperature.

5. The measuring device according to claim 1 , wherein the control unit does not use the currently measured weight of the object as valid data if the currently measured weight of the object is greater than the previously measured weight.

6. The measuring device of claim 1, wherein the control unit does not use the previously measured weight as valid data if the previously measured weight of the object is greater than the weight measured two times before and the current measured weight returns to a value close to the previously measured weight.

7. The measuring device of claim 1, wherein the control unit does not use the previously measured weight as valid data if the previously measured weight of the object is less than a predetermined amount compared to the previously measured weight and the current measured weight returns to a value close to the previously measured weight.

8. The measuring device according to claim 1 , wherein the control unit determines that the object is filled with a substance when a current measured weight of the object is greater than a previously measured weight.

9. The measuring device according to claim 1, wherein the control unit determines that a substance has been filled into the object when the previously measured weight of the object is greater than the weight measured two times before and when the current measured weight is close to the previously measured weight.

Images