Power consumption analysis device of sewing machine

Abstract

The invention provides a power consumption analysis device of a sewing machine. The power consumption analysis device can calculate productivity under a power consumption reference for the sewing machine. The present invention comprises: a power acquisition unit for acquiring the power of a sewing machine (100) for sewing; a motor speed acquisition unit (33) that acquires the rotational speed of a sewing machine motor (101), which is a sewing drive source of the sewing machine (100); and a productivity acquisition unit (22) that calculates power consumption on the basis of the power acquired by the power acquisition unit, and determines productivity at a power consumption reference on the basis of the correlation between the power consumption and the rotational speed. Therefore, the sewing work of the sewing machine can be evaluated by using the productivity in the power consumption viewpoint instead of the productivity based on the work efficiency viewpoint.

Description

Technical Field

[0001] The invention relates to a power consumption analysis device for a sewing machine. Background Art

[0002] Conventionally, there is known a production system that acquires various information from a sewing machine and performs various supports for improving sewing productivity (for example, refer to Patent Document 1).

[0003] [Prior art literature] [Patent Document] [Patent Document 1] Japanese Patent Application Publication No. 2021-117815. Summary of the invention

[0004] However, this type of production system is only aimed at improving productivity from the perspective of work efficiency, without considering power consumption.

[0005] The object of the present invention is to measure the productivity based on the power consumption of a sewing machine.

[0006] The present invention is characterized in that, in a power consumption analysis device for a sewing machine, the device comprises: A power acquisition unit, which acquires the power of the sewing machine for sewing; a motor speed acquisition unit for acquiring a rotation speed of a sewing machine motor which is a sewing drive source of the sewing machine; and The productivity acquisition unit calculates power consumption based on the power acquired by the power acquisition unit, and obtains productivity based on power consumption based on a correlation between the power consumption and the rotation speed.

[0007] According to the present invention, productivity can be measured based on power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 1. It is a schematic structural diagram showing a state where the power consumption analysis device of the present embodiment, i.e., a sewing machine, is connected to the sewing machine; Figure 2 is a block diagram showing the structure of a power consumption analysis device for a sewing machine; 3 (A) and FIG. 3 (B) are line graphs showing changes in the rotation speed of the sewing machine motor and the power of the sewing machine over time, FIG. 3 (A) shows a rapid acceleration, and FIG. 3 (B) shows a slow acceleration; Figure 4 This is a flowchart showing a series of processes performed by the power consumption analysis device for a sewing machine.

[0009] [Explanation of Symbols] 10: Power consumption analysis device; 20: Microcomputer; 21: power calculation unit (power acquisition unit); 22: Productivity Acquisition Department; 23: Record processing department; 24: Image generation unit; 25: instruction generation unit; 26: Notification processing department; 31: current detection unit (power acquisition unit); 32: voltage detection unit (power acquisition unit); 33: Interface (motor speed acquisition unit); 34: Wireless Communication Department; 35: storage unit; 36: Detection device; 100: Sewing machine; 101: Sewing machine motor; 102: control device; 103: power supply circuit; 104: pedal; 105: pulley; 106: power cable; 110: terminal; AC: alternating current power. DETAILED DESCRIPTION

[0010] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Figure 1 1 is a schematic structural diagram showing a state in which the power consumption analysis device 10 for a sewing machine according to the present embodiment is connected to a sewing machine 100 .

[0011] [Sewing machine] like Figure 1 As shown, the sewing machine 100, which is the object of power consumption analysis by the power consumption analysis device 10, includes at least: a sewing machine motor 101, which is a driving source for the up and down movement of the sewing needle; a pulley 105, which rotates simultaneously with the output shaft of the sewing machine motor 101; a control device 102, which controls the operation of the sewing machine motor 101; a power circuit 103, which supplies power to the entire sewing machine; and a pedal 104, which is an operating unit for the operator to input the target sewing speed (rotation speed of the sewing machine motor 101) using his foot.

[0012] The control device 102 of the sewing machine 100 performs feedback control on the sewing machine motor 101 so that the number of revolutions corresponds to the amount of depression of the pedal 104. Therefore, an encoder (not shown) is also provided in the sewing machine motor 101, and the change in the number of revolutions (rotation angle) of the output shaft of the sewing machine motor 101 is always input to the control device 102 from the encoder. Thus, the control device 102 can obtain the shaft angle, rotation speed, and rotation acceleration of the sewing machine motor 101.

[0013] The power circuit 103 is supplied with power from an alternating current power source AC via a power cable 106 , and supplies necessary power to each part of the sewing machine 100 .

[0014] [Power consumption analysis device] Figure 2 is a block diagram showing the structure of the power consumption analysis device 10 .

[0015] The power consumption analysis device 10 comprises: a microcomputer 20; a current detection unit 31; a voltage detection unit 32; an interface 33 for wired connection with the control device 102 of the sewing machine 100; a wireless communication unit 34 for wireless communication with the outside; and a storage unit 35 for storing various programs and data.

[0016] The power consumption analysis device 10 is arranged between the power supply circuit 103 and the power cable of the sewing machine 100, in the middle of the power cable 106, or between the power cable 106 and the AC power supply AC. The current detection unit 31 detects the current value flowing in the power cable 106, and the voltage detection unit 32 detects the voltage value in the power cable 106.

[0017] The interface 33 is an interface including a connector for transmitting and receiving signals from the outside.

[0018] For example, when the sewing machine 100 has a connector for communicating with the outside and has a function of transmitting and receiving predetermined data by connecting a communication cable, it can be used to connect the communication cable to the power consumption analysis device 10. In this case, the interface 33 also has a connector for connecting the communication cable.

[0019] In the present embodiment, the interface 33 is used to acquire data on the shaft angle, rotation speed, and rotation acceleration of the sewing machine motor 101 detected by an encoder in the sewing machine 100. In this case, the interface 33 functions as a "motor speed acquisition unit."

[0020] In addition, sometimes the sewing machine 100 does not have a function of communicating with the outside. In this case, Figure 1As illustrated, a detection device 36 is used, which detects the rotation speed of the sewing machine motor from the pulley 105, which is a member that rotates outside the sewing machine 100 in synchronization with the rotation of the sewing machine motor 101. The detection device 36 includes, for example, a detection body that contacts the outer peripheral surface of the pulley 105 and rotates together, and an encoder that detects the rotation angle of the detection body, a tachometer, a potentiometer, a resolver, and other sensors that detect the rotation angle.

[0021] Furthermore, the interface 33 receives a detection signal from a sensor of the detection device 36. In this case, the interface 33 and the detection device 36 function as a "motor speed acquisition unit".

[0022] The wireless communication unit 34 is used for information communication between the microcomputer 20 and the outside of the device. The wireless communication unit 34 is a communication element that transmits and receives various commands or information with other information processing terminals or sewing machines having information processing functions via a predetermined communication network based on a predetermined wireless communication standard.

[0023] The communication network used may include, for example, a mobile communication network with base stations as terminals, a satellite communication network using high-altitude communication satellites, a short-range communication network complying with protocols such as Wireless Fidelity (WiFi) or Bluetooth (registered trademark), and an Internet communication network.

[0024] Furthermore, when the sewing machine 100 includes a wireless communication element, the data of the shaft angle, rotation speed, and rotation acceleration of the sewing machine motor 101 may be acquired from the wireless communication unit 34 instead of from the interface 33. In this case, the wireless communication unit 34 functions as a "motor speed acquisition unit".

[0025] The storage unit 35 is a nonvolatile storage device such as a hard disk drive (HDD) or a semiconductor memory that stores various data and programs.

[0026] The storage unit 35 stores, for example, a value of productivity based on power consumption calculated by the productivity acquisition unit 22 described later.

[0027] [Microcomputer] The functions of the microcomputer 20 are implemented by any hardware, software or a combination thereof. The microcomputer 20 is composed of, for example, a microcomputer including a central processing unit (CPU), a random access memory (RAM), a read-only memory (ROM), an input / output device (I / O), etc.

[0028] The microcomputer 20 has a functional configuration realized by software processing and includes a power calculation unit 21 , a productivity acquisition unit 22 , a recording processing unit 23 , an image generation unit 24 , a command generation unit 25 , and a notification processing unit 26 .

[0029] The above-mentioned functional structures are described.

[0030] [Microcomputer: Power calculation unit] The power calculation unit 21 calculates the power of the sewing machine 100 during sewing based on the current value flowing through the power cable 106 of the sewing machine 100 detected by the current detection unit 31 and the voltage value of the power cable 106 detected by the voltage detection unit 32 .

[0031] Thus, the power calculation unit 21, the current detection unit 31, and the voltage detection unit 32 function as a “power acquisition unit”.

[0032] [Microcomputer: Productivity acquisition unit] The productivity acquisition unit 22 obtains the productivity under the power consumption standard based on the correlation between the power consumption and the rotation speed of the sewing machine motor 101. The so-called productivity under the power consumption standard mentioned here is the sewing operation volume relative to the power consumption of a specified amount, or the power consumption relative to the sewing operation volume of a specified amount. If it is the former, the larger its value, the higher the productivity under the power consumption standard, and if it is the latter, the smaller its value, the higher the productivity under the power consumption standard.

[0033] The amount of sewing work is, for example, the total number of stitches (the total number of revolutions of the sewing machine motor 101 ) within a predetermined period, the number of sewn objects to be sewn, the number of sewing work completed per predetermined step, and the like.

[0034] FIG3 (A) and FIG3 (B) are line graphs showing the change in the rotation speed of the sewing machine motor 101 obtained via the interface 33 and the change in the power of the sewing machine 100 obtained by the power calculation unit 21 over time. FIG3 (A) shows the case where the pedal 104 is suddenly depressed, and FIG3 (B) shows the case where the pedal 104 is slowly depressed.

[0035] The productivity acquisition unit 22 integrates the acquired temporal changes in the rotation speed of the sewing machine motor 101 over a predetermined period and calculates the total number of revolutions of the sewing machine motor 101 (equivalent to the total number of stitches) during the period as the sewing workload.

[0036] The productivity acquisition unit 22 also integrates the acquired temporal change in the power of the sewing machine motor 101 over a predetermined period similar to the temporal change in the rotation speed, and calculates the power consumption during the period.

[0037] Regarding the productivity under the power consumption reference, the productivity acquisition unit 22 calculates, for example, the ratio of the sewing workload to the power consumption, for example, (sewing workload) / (power consumption), and outputs it as the productivity under the power consumption reference. The calculated productivity under the power consumption reference is recorded in the storage unit 35. In this case, the productivity under the power consumption reference may also be recorded in the storage unit 35 together with information on the date and time when the measurement was performed.

[0038] In addition, the "predetermined period" when integrating the rotation speed and the power can be a small time of less than a second, or can be set to a certain operation time of tens of seconds to several minutes. In addition, it can also be set to the period until a series of sewing is completed. For example, it can be set to the period from the start of the sewing machine motor 101 from the stop state to the next stop state.

[0039] In addition, the productivity acquisition unit 22 periodically performs the calculation of the productivity under the power consumption reference, but the calculation period does not need to be set to the same period as the "predetermined period". Therefore, for example, the productivity under the power consumption reference can be continuously and repeatedly calculated in a small repetition period that is much shorter than the predetermined period.

[0040] 3A shows a change in which the rotation speed of the sewing machine motor 101 increases rapidly when the pedal 104 is depressed rapidly, so the speed increases and decreases repeatedly by slowing down the depression of the pedal 104. In addition, the speed increases and decreases repeatedly by feedback control in some cases.

[0041] On the other hand, as shown in FIG. 3(B) , when the pedal 104 is slowly depressed, the rotation speed of the sewing machine motor 101 is slowly increased to a target rotation speed.

[0042] The ratio of the power increase to the rapid increase in rotation speed also increases, so in an operation pattern such as FIG3(A) , the productivity based on the power consumption shows a tendency to decrease.

[0043] [Microcomputer: Recording Processing Unit] For example, when the recording processing unit 23 is able to obtain the operator's specific information (identification code (ID) etc.) from the sewing machine 100 via the interface 33 or the wireless communication unit 34, the productivity under the power consumption benchmark calculated by the productivity acquisition unit 22 is recorded in the storage unit 35 in association with the operator's specific information.

[0044] In addition, the acquisition source of the operator's specific information is not limited to the sewing machine 100. For example, in the sewing machine 100, in order to collect data related to productivity from the work performance of the operator of the sewing machine 100, a terminal 110 including an information processing terminal may be provided in the sewing machine 100. In this way, when an information processing terminal such as the terminal 110 is provided in the sewing machine 100, the operator's specific information can also be obtained from the terminal 110. The terminal 110 can obtain the operator's specific information from any of wired and wireless communications.

[0045] [Microcomputer: Image generation unit] The image generating unit 24 generates display data for displaying, in an image, the temporal change in the power calculated by the power calculating unit 21 and the temporal change in the rotation speed of the sewing machine motor 101 acquired through the interface 33 .

[0046] The display data at this time may be image data of a line graph showing the change of power and rotation speed over time, or may be data showing the respective numerical values ​​of power and rotation speed changing in time series for plotting the change of power and rotation speed over time.

[0047] The power consumption analyzing device 10 does not include a display unit, so an image based on the display data generated by the image generating unit 24 cannot be displayed in the power consumption analyzing device 10 . However, the display data can be transmitted to a surrounding information processing terminal capable of data communication to display an image.

[0048] For example, when the sewing machine 100 includes a display unit such as a display panel, the display data may be sent to the sewing machine 100 for display. In addition, the display data may be sent to the terminal 110 for display. Furthermore, the display data may be sent to other information processing terminals that can be connected to the terminal 110 through the network to which the terminal 110 belongs for communication and displayed.

[0049] Furthermore, the power consumption analyzing device 10 may include a display unit for displaying information.

[0050] [Microcomputer: Command generation unit] The command generating unit 25 generates an operation limiting command for the sewing machine motor 101 for the purpose of improving productivity under the power consumption standard.

[0051] As shown in FIG. 3(A) and FIG. 3(B) , a rapid increase in the rotation speed of the sewing machine motor 101 is accompanied by large power consumption.

[0052] Therefore, the command generation unit 25 sets an upper limit value of the speed or an upper limit value of the acceleration for the rotation speed of the sewing machine motor 101 obtained via the interface 33, etc. Furthermore, when the rotation speed of the sewing machine motor 101 obtained via the interface 33, etc. exceeds the upper limit value of the speed, or when the acceleration is calculated based on the rotation speed of the sewing machine motor 101 obtained via the interface 33, etc. and the value exceeds the upper limit value of the acceleration, the command generation unit 25 can input a command to suppress the rotation speed of the sewing machine motor 101 or a command to suppress the acceleration to the control device 102 of the sewing machine 100 when it is possible to communicate with the sewing machine 100 via the interface 33 or the wireless communication unit 34.

[0053] On the other hand, in the case where the sewing machine 100 is configured to be unable to communicate with the power consumption analysis device 10, when the rotation speed or acceleration of the sewing machine motor 101 exceeds the upper limit value, for example, on an external information processing terminal capable of data communication, such as the terminal 110 or another information processing terminal capable of communication connection with the terminal 110, it is possible to display that the rotation speed should be reduced, or to calculate an appropriate value of the rotation speed or acceleration (for example, the upper limit value or a value obtained by subtracting a predetermined value from the upper limit value) and display it on the information processing terminal. In addition, in the case where the power consumption analysis device 10 includes a display unit, it is possible to set a configuration in which the display is performed using the display unit.

[0054] Furthermore, regarding the upper limit value of the speed or the upper limit value of the acceleration, the power consumption analyzing device 10 may be configured to include an input unit for setting the numerical value.

[0055] In addition, the command generation unit 25 may be configured to have both the upper limit value of the speed and the upper limit value of the acceleration and monitor both the rotation speed and acceleration of the sewing machine motor 101. Alternatively, the command generation unit 25 may be configured to have only one of the upper limit value of the speed and the upper limit value of the acceleration and monitor only one of the rotation speed and acceleration of the sewing machine motor 101.

[0056] [Microcomputer: Notification Processing Unit] The notification processing unit 26 determines whether the value of the productivity based on the power consumption standard periodically obtained by the productivity acquisition unit 22 is appropriate, and performs notification processing if it is abnormal.

[0057] As described above, the values ​​of productivity based on the power consumption standard periodically obtained by the productivity acquisition unit 22 are sequentially stored in the storage unit 35 .

[0058] Therefore, the notification processing unit 26 can judge whether the value of the productivity under the power consumption benchmark is appropriate based on the past value. For example, when a certain number of productivity values ​​under the power consumption benchmark are accumulated, the notification processing unit 26 performs statistical processing on them, such as averaging processing (or moving average processing), and uses the calculated value as the benchmark value for judging whether it is appropriate.

[0059] The notification processing unit 26 determines a lower limit value of the productivity value under the power consumption reference periodically calculated by the productivity acquisition unit 22 by subtracting a predetermined value from the reference value, and judges it as "appropriate" if it is above the lower limit value, and judges it as "inappropriate" if it is below the lower limit value.

[0060] Then, when the determination is “inappropriate”, the notification processing unit 26 executes notification processing.

[0061] The notification process may be performed on surrounding information processing terminals capable of communication. For example, in the case where the sewing machine 100 includes a display unit such as a display panel, an execution instruction for the notification process may be sent to the sewing machine 100 to display the occurrence of a reduction in productivity under a power consumption benchmark. In addition, an execution instruction for the notification process may also be sent to the terminal 110 to display the occurrence of a reduction in productivity under a power consumption benchmark. Furthermore, other information processing terminals capable of communicating with the terminal 110 via a network to which the terminal 110 belongs may also be caused to display the occurrence of a reduction in productivity under a power consumption benchmark.

[0062] Furthermore, the power consumption analysis device 10 may include an output unit that outputs abnormal conditions in a form that can be perceived by humans, thereby notifying the occurrence of reduced productivity under the power consumption standard. The output unit that outputs abnormal conditions in a form that can be perceived by humans may be an image display unit, or a light that is lit or a sound output unit.

[0063] [Processing of Power Consumption Analysis Device] based on Figure 4 The overall processing performed by the microcomputer 20 of the power consumption analysis device 10 will be described with reference to the flowchart of FIG.

[0064] When the CPU of the microcomputer 20 detects the current and voltage from the power cable 106 of the sewing machine 100 and inputs the rotation speed of the sewing machine motor 101 from the interface 33 (step S1 ), it calculates the power of the sewing machine 100 (step S3 : power calculation unit 21 ).

[0065] On the other hand, the CPU compares the rotation speed of the sewing machine motor 101 or the acceleration obtained from the rotation speed with a preset upper limit value (step S5: command generation unit 25). Furthermore, when the upper limit value is exceeded, a command to suppress the rotation speed of the sewing machine motor 101 or a command to suppress the acceleration is input to the control device 102 of the sewing machine 100 (step S7). In addition, a situation in which the rotation speed should be reduced or an appropriate value of the rotation speed or acceleration may also be displayed.

[0066] Then, the CPU generates display data for displaying the temporal changes in the rotation speed of the sewing machine motor 101 and the temporal changes in the power of the sewing machine 100 in an image (step S9: image generating unit 24). The display data is recorded in the storage unit 35 and transmitted when the display destination is determined.

[0067] Then, the CPU integrates the calculated temporal changes in the power of the sewing machine 100 and the temporal changes in the rotation speed of the sewing machine motor 101 to calculate the power consumption and the sewing workload (step S11 : productivity acquisition unit 22 ).

[0068] Furthermore, the CPU calculates the productivity based on the power consumption and the sewing workload calculated (step S13 : productivity acquisition unit 22 ).

[0069] Furthermore, the CPU records the calculated productivity under the power consumption reference in the storage unit 35 (step S15: recording processing unit 23). When recording, if information for identifying the operator of the current sewing machine 100 can be obtained, the calculated productivity under the power consumption reference is recorded in the storage unit 35 in association with the information for identifying the operator.

[0070] Then, the CPU compares the calculated productivity under the power consumption standard with the preset lower limit value (step S17: notification processing unit 26). And, if it is lower than the lower limit value, the CPU performs a process of notifying the occurrence of a decrease in productivity under the power consumption standard of the sewing machine 100 (step S19: notification processing unit 26). When the notification destination is determined, an instruction to execute the notification process is sent to the notification destination.

[0071] In addition, when the calculated productivity under the power consumption standard is equal to or greater than the lower limit value, the CPU ends the processing.

[0072] Furthermore, the CPU repeatedly executes the processing of step S1 to step S15 in a short cycle.

[0073] [Technical Effects of Implementation] The power consumption analysis device 10 includes a productivity acquisition unit 22 that calculates power consumption based on the detected power of the sewing machine 100 and obtains productivity based on power consumption based on the correlation between the power consumption and the rotation speed of the sewing machine motor 101 .

[0074] Thus, the sewing of the sewing machine 100 can be evaluated based on productivity based on power consumption rather than productivity based on work efficiency.

[0075] In addition, the image generation unit 24 of the power consumption analysis device 10 generates display data for displaying the change in power over time in the sewing machine 100 and the change in rotation speed over time of the sewing machine motor 101 on an image, so that the correlation between the operation of the sewing machine 100 and the change in power can be easily grasped through the display data.

[0076] Furthermore, the power consumption analysis device 10 includes a recording processing unit 23 that records the productivity obtained by the productivity acquisition unit 22 in association with specific information of the operator operating the sewing machine 100. Therefore, the processing of the sewing machine by a specific operator can be evaluated based on the productivity based on the power consumption.

[0077] Furthermore, the power consumption analysis device 10 includes a command generation unit 25 that generates an operation restriction command for the sewing machine motor 101 for the purpose of improving productivity under the power consumption standard.

[0078] Therefore, when the sewing machine 100 receives the motion restriction command and restricts the rotation speed or acceleration of the sewing machine motor 101, wasteful power consumption can be suppressed.

[0079] In addition, the power consumption analysis device 10 includes a notification processing unit 26, which determines whether the productivity under the power consumption reference obtained by the productivity acquisition unit 22 is appropriate, and performs notification processing in an abnormal situation, so that the occurrence of reduced productivity can be recognized by the outside. As a result, actions to avoid reduced productivity can be taken quickly, or the cause of reduced productivity can be easily grasped.

[0080] In particular, when the power consumption analysis device 10 includes an output unit that outputs abnormal conditions in a form that can be perceived by humans based on notification processing, the occurrence of reduced productivity can be identified on the spot, so that actions to avoid reduced productivity can be executed more quickly, or the cause of reduced productivity can be identified more clearly.

[0081] Furthermore, when the power consumption analysis device 10 includes a detection device 36 for detecting the rotation speed of the sewing machine motor 101 from the pulley 105 rotating outside the sewing machine 100 in synchronization with the rotation of the sewing machine motor 101, even when the sewing machine 100 does not have a function of outputting the rotation speed of the sewing machine motor 101 to the outside, the rotation speed of the sewing machine motor 101 can be detected without modifying the sewing machine 100. Therefore, the productivity under the power consumption standard can be obtained for most sewing machines.

[0082] [other] The above describes the various embodiments of the present invention. However, the present invention is not limited to the embodiments. For example, in the embodiments, a component formed integrally by a single member can be replaced by a component formed by being divided into a plurality of members and connected or fixed to each other. In addition, a component formed by connecting a plurality of members can also be replaced by a component formed integrally by a single member. In addition, the details shown in the embodiments can be appropriately changed within the scope of the main purpose of the invention.

[0083] Since the power consumption analyzing device 10 is configured as a device independent of the sewing machine 100 , the productivity based on the power consumption standard can be obtained by external connection without modifying the existing sewing machine 100 .

[0084] However, the present invention is not limited to this structure, and the power consumption analysis device 10 may be configured to be incorporated as a part of the sewing machine 100 .

[0085] The power consumption analysis device 10 may be disposed between the socket of the AC power source and the plug provided at the top of the power cable 106 of the sewing machine 100. With this configuration, the current and voltage of the sewing machine 100 can be detected more easily from the outside.

[0086] Furthermore, the power consumption analysis device 10 may be configured to detect the current and voltage of the sewing machine 100 from the outside of the cable casing of the power cable 106 of the sewing machine 100 .

[0087] In addition, in the above embodiment, the sewing machine 100 in which the rotation speed of the sewing machine motor 101 changes according to the pedal operation of the operator is illustrated, but the present invention is not limited to this. For example, the power consumption analysis device 10 can also be provided in a sewing machine that automatically sews at a predetermined target speed when a trigger for sewing start is input. In this case, it can be flexibly applied to re-examining the setting value of the target speed of the sewing machine, the value of the gain when performing feedback control, and the like.

Claims

1. A power consumption analysis device for a sewing machine, characterized in that: include: A power acquisition unit, which acquires the power of the sewing machine for sewing; a motor speed acquisition unit for acquiring a rotation speed of a sewing machine motor which is a sewing drive source of the sewing machine; as well as The productivity acquisition unit calculates power consumption based on the power acquired by the power acquisition unit, and obtains productivity based on power consumption based on a correlation between the power consumption and the rotation speed.

2. The power consumption analysis device for a sewing machine according to claim 1, characterized in that: An image generating unit is included, which generates display data for displaying on an image the change over time of the power acquired by the power acquiring unit and the change over time of the rotation speed of the sewing machine motor acquired by the motor speed acquiring unit.

3. The power consumption analysis device for a sewing machine according to claim 1, characterized in that: The device includes a recording processing unit that records the productivity obtained by the productivity acquisition unit in association with specific information of an operator operating the sewing machine.

4. The power consumption analysis device for a sewing machine according to claim 1, characterized in that: A command generating unit is included, which generates an operation restriction command for the sewing machine motor for the purpose of improving productivity under the power consumption standard.

5. The power consumption analysis device for a sewing machine according to claim 1, characterized in that: The invention includes a notification processing unit that determines whether the productivity based on the power consumption standard obtained by the productivity acquisition unit is appropriate, and performs notification processing in the case of abnormality.

6. The power consumption analysis device for a sewing machine according to claim 5, characterized in that: An output unit is included, and the output unit outputs the abnormal situation in a form that can be perceived by humans based on the notification processing.

7. The power consumption analysis device for a sewing machine according to claim 1, characterized in that: The motor speed acquisition unit detects a rotation speed of the sewing machine motor from a member that rotates outside the sewing machine in synchronization with the rotation of the sewing machine motor.

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