TWI709676B

TWI709676B - Sewing machine having automatically controlling process, and method for controlling the same

Info

Publication number: TWI709676B
Application number: TW108116775A
Authority: TW
Inventors: 林培嘉
Original assignee: 高林股份有限公司
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-11-11
Also published as: TW202043569A

Abstract

A sewing machine used for sewing cloths having a control unit, an operation interface, a cloth sensing unit, a motor driver, and a motor is disclosed. The cloth sensing unit senses current thickness of the cloth upon the sewing machine. When the current thickness is sensed within a threshold, the control unit directly accepts an instruction from the operation interface and sends a corresponding operation signal to the motor driver, and the motor driver then controls the speed of the motor correspondingly according to the operation signal. When the current thickness changes, the control unit automatically generates and transmits a slow-down signal to the motor driver, and the motor driver replaces the operation signal with the slow-down signal for changing the speed of the motor according to the slow-down signal, therefore, the sewing machine is effectively and automatically prevented from being damaged due to thick cloth and speeded motor.

Description

具自動控制機制的縫紉機及其自動控制方法 Sewing machine with automatic control mechanism and automatic control method thereof

本發明涉及縫紉機，尤其涉及一種具有自動控制機制的縫紉機，以及縫紉機的自動控制方法。 The invention relates to a sewing machine, in particular to a sewing machine with an automatic control mechanism, and an automatic control method of the sewing machine.

於正常無特殊需求之狀況下，縫紉機的操作技工通常會以最高的運轉速度來操作縫紉機，以求機縫紉機全速運行並得到最高工作效率。在特定情況下，操作技工會適當調降縫紉機的運轉速度，以求縫紉機不會有機件損壞而導致生產進度停擺的問題產生。 Under normal conditions without special requirements, the sewing machine operator will usually operate the sewing machine at the highest operating speed in order to run the sewing machine at full speed and obtain the highest work efficiency. Under certain circumstances, the operating technicians should appropriately reduce the operating speed of the sewing machine, so that the sewing machine will not be damaged and the production schedule will stop.

具體地，縫紉機在運作時，其縫針穿刺布料時所承受的反作用力會隨著馬達的運轉速度增加而變大，並且當布料的厚度越厚時，鍵針的上述反作用力也會越大。若縫紉機在馬達高速運轉下控制縫針穿刺一定厚度以上的布料，其產生的反作用力可能會大於縫針本身可承受之力量而使得鍵針斷裂。 Specifically, when the sewing machine is in operation, the reaction force experienced by the needle when it pierces the cloth will increase as the operating speed of the motor increases, and the greater the thickness of the cloth, the greater the reaction force of the key needle. If the sewing machine controls the sewing needle to pierce the cloth with a certain thickness under the high-speed motor operation, the reaction force generated by the sewing machine may be greater than the force that the sewing needle itself can bear, causing the key needle to break.

為了避免鍵針在縫紉機的運作過程中斷裂，操作技工須在縫紉機運作時以自身的視覺及/或觸覺來觀察當前布料的厚度變化，在布料變厚時迅速調降縫紉機的運轉速度以避免縫針斷裂，並且在布料變薄時恢復縫紉機的運轉速度以確保並維持生產效率。 In order to prevent the key needle from breaking during the operation of the sewing machine, the operator must observe the current thickness change of the fabric with his own vision and/or touch when the sewing machine is operating, and quickly reduce the operating speed of the sewing machine when the fabric thickens to avoid stitches Break, and restore the operating speed of the sewing machine when the cloth becomes thinner to ensure and maintain production efficiency.

由上述說明可看出，目前的縫紉機需要高度仰賴操作技工自身以極高的專注力及反應能力來進行操作，如此才能夠避免上述問題的發生。然而，高度的專注力和反應能力將會加速操作技工的疲勞程度，因此，如何在能夠維持生產效率及品質的前提下降低操作技工的疲勞程度，即為本領域的技術人員所潛心研究的課題。 It can be seen from the above description that the current sewing machine needs to rely heavily on the operator's own high concentration and reaction ability to operate, so as to avoid the occurrence of the above problems. However, a high degree of concentration and responsiveness will accelerate the fatigue of the operator. Therefore, how to reduce the fatigue of the operator while maintaining the production efficiency and quality is a topic that the technicians in this field have concentrated on. .

本發明的主要目的，在於提供一種具自動控制機制的縫紉機及其自動控制方法，可依據當前縫紉的布料的厚度來自動控制並改變馬達的運轉速度。 The main purpose of the present invention is to provide a sewing machine with an automatic control mechanism and an automatic control method thereof, which can automatically control and change the operating speed of the motor according to the thickness of the currently sewn cloth.

為了達成上述目的，本發明縫紉機主要是具有一控制單元、一操作介面、一布料感測單元、一馬達驅動單元及一馬達。該布料感測單元用以感測當前縫紉的一布料的厚度。當該布料的厚度落在一門檻值內時，該控制單元接受該操作介面發出的一指示向該馬達驅動器發出對應的一操作訊號，該馬達驅動器依據該控制單元的該操作訊號對應控制該馬達的一運轉速度。當該布料感測單元感測到該布料的厚度改變時，該控制單元自動產生一減速訊號並發送至該馬達驅動器，該馬達驅動器以該減速訊號取代原先的該操作訊號而改變該馬達的該運轉速度。 In order to achieve the above objective, the sewing machine of the present invention mainly has a control unit, an operating interface, a cloth sensing unit, a motor driving unit and a motor. The cloth sensing unit is used for sensing the thickness of a cloth currently being sewn. When the thickness of the cloth falls within a threshold, the control unit receives an instruction from the operation interface and sends a corresponding operation signal to the motor driver, and the motor driver correspondingly controls the motor according to the operation signal of the control unit One running speed. When the cloth sensing unit senses that the thickness of the cloth changes, the control unit automatically generates a deceleration signal and sends it to the motor driver. The motor driver replaces the original operation signal with the deceleration signal to change the motor's Operating speed.

本發明相較於相關技術所能達到的技術功效在於，依據布料的厚度來自動控制與限制馬達的運轉速度，可避免操作技工操作不慎而造成縫紉機損壞的問題。如此一來，本發明可有效輔助人工的操作，大幅降低縫紉機對於操作技工熟練度、專注力及反應力之需求，藉此在避免上述問題發生的同時維持生產效率。 Compared with the related technology, the technical effect of the present invention is that it can automatically control and limit the running speed of the motor according to the thickness of the cloth, which can avoid the problem of the sewing machine being damaged by the operator's careless operation. In this way, the present invention can effectively assist manual operation and greatly reduce the operation The skill of the craftsman, concentration and reaction ability are required to avoid the above-mentioned problems while maintaining production efficiency.

1:縫紉機 1: Sewing machine

10:控制單元 10: Control unit

101:演算法 101: Algorithm

11:操作介面 11: Operation interface

12:馬達驅動單元 12: Motor drive unit

13:馬達 13: Motor

14:縫紉機主軸 14: Sewing machine spindle

15:布料感測單元 15: Cloth sensing unit

16:設定介面 16: Setting interface

17:顯示介面 17: display interface

18:平台 18: platform

19:送布牙 19: Feeding teeth

21:針棒 21: Needle bar

22:縫針 22: Stitch

3:抬壓腳機構 3: Presser foot mechanism

31:傳動軸 31: drive shaft

32:樞軸 32: pivot

33:壓布元件 33: Pressing element

4:布料 4: cloth

5:布料感測單元 5: Cloth sensing unit

H1:第一高度 H1: first height

H2:第二高度 H2: second height

S10~S30:控制步驟 S10~S30: Control steps

圖1為本發明的縫紉機方塊圖的第一具體實施例。 Fig. 1 is a first embodiment of a block diagram of a sewing machine of the present invention.

圖2為本發明的縫紉機運作示意圖的第一具體實施例。 Fig. 2 is a first embodiment of the operation schematic diagram of the sewing machine of the present invention.

圖3為本發明的位移量訊號示意圖的第一具體實施例。 FIG. 3 is a first specific embodiment of the schematic diagram of the displacement signal of the present invention.

圖4為本發明的控制流程圖的第一具體實施例。 Fig. 4 is a first specific embodiment of the control flowchart of the present invention.

圖5為本發明的縫紉機運作示意圖的第二具體實施例。 Fig. 5 is a second embodiment of the operation schematic diagram of the sewing machine of the present invention.

茲就本發明之一較佳實施例，配合圖式，詳細說明如後。 For a preferred embodiment of the present invention, with the drawings, the detailed description is as follows.

參閱圖1，為本發明的縫紉機方塊圖的第一具體實施例。本發明揭露了一種具自動控制機制的縫紉機(下面將於說明書中簡稱為縫紉機1)，如圖1所示，所述縫紉機1至少包括控制單元10，以及與控制單元10電性連接的操作介面11、馬達驅動單元12及布料感測單元15。 Refer to Fig. 1, which is a first embodiment of the block diagram of the sewing machine of the present invention. The present invention discloses a sewing machine with an automatic control mechanism (hereinafter referred to as sewing machine 1 in the specification). As shown in FIG. 1, the sewing machine 1 at least includes a control unit 10 and an operating interface electrically connected to the control unit 10. 11. Motor drive unit 12 and cloth sensing unit 15.

所述控制單元10主要用以整合縫紉機1內部的電子元件並傳遞對應的電子訊號，於一實施例中，所述控制單元10可例如為微控制單元(Micro Control Unit,MCU)、處理器(Processor)或系統單晶片(System On a Chip)等，不加以限定。 The control unit 10 is mainly used to integrate electronic components inside the sewing machine 1 and transmit corresponding electronic signals. In one embodiment, the control unit 10 may be, for example, a micro control unit (MCU), a processor ( Processor) or System On a Chip (System On a Chip), etc., are not limited.

所述操作介面11可為實體介面(例如由實體按鍵、開關、切換器、操縱桿等構成的介面)或虛擬介面(例如顯示在螢幕上的人機介面)，使用者可對通過操作介面11來對縫紉機1進行控制。於一實施例中，縫紉機1主要可通過操作介面11來接受使用者(例如為操作技工)的操控，以調整縫紉機1的運作模式、運作速度等參數。 The operating interface 11 can be a physical interface (for example, an interface composed of physical buttons, switches, switches, joysticks, etc.) or a virtual interface (for example, a human-machine interface displayed on a screen), and the user can The sewing machine 1 is controlled through the operation interface 11. In one embodiment, the sewing machine 1 can be manipulated by a user (for example, an operator) through the operating interface 11 to adjust the operating mode, operating speed and other parameters of the sewing machine 1.

如圖1所示，所述馬達驅動單元12電性連接縫紉機1的馬達13，並且依據控制單元10的控制來調整馬達13的運轉速度。 As shown in FIG. 1, the motor driving unit 12 is electrically connected to the motor 13 of the sewing machine 1, and the operating speed of the motor 13 is adjusted according to the control of the control unit 10.

具體地，當使用者在操作介面11上進行了操作後，操作介面11會依據使用者的操作行為產生對應的控制指令，並將控制指令傳送至控制單元10(例如以線控方式送出電子訊號至控制單元10)。在正常運作的情況下，縫紉機1的控制權預設屬於操作介面11，即，使用者可以通過操作介面11完全掌控縫紉機1的運作。於此情況下，控制單元10將依據所接收的控制指令產生對應的操作訊號，並將操作訊號傳送至馬達驅動單元12。 Specifically, after the user performs an operation on the operating interface 11, the operating interface 11 generates corresponding control instructions according to the user's operating behavior, and transmits the control instructions to the control unit 10 (for example, sending electronic signals by wire control) To the control unit 10). In the case of normal operation, the control right of the sewing machine 1 belongs to the operation interface 11 by default, that is, the user can fully control the operation of the sewing machine 1 through the operation interface 11. In this case, the control unit 10 will generate a corresponding operation signal according to the received control command, and transmit the operation signal to the motor driving unit 12.

本實施例中，控制單元10產生的操作訊號亦為一種電子訊號。馬達驅動單元12接收控制單元10發出的操作訊號後，即可依據操作訊號輸出對應的電力給馬達13，藉以驅動馬達13進行運轉。其中，馬達驅動單元12所輸出的電力大小係對應至所述操作訊號的內容，藉此，馬達驅動單元12可確保馬達13運轉於特定的運轉速度(即，令馬達13的運轉速度對應至使用者的操作行為)。 In this embodiment, the operation signal generated by the control unit 10 is also an electronic signal. After the motor drive unit 12 receives the operation signal sent by the control unit 10, it can output corresponding power to the motor 13 according to the operation signal, thereby driving the motor 13 to operate. Wherein, the amount of power output by the motor drive unit 12 corresponds to the content of the operation signal, whereby the motor drive unit 12 can ensure that the motor 13 runs at a specific operating speed (that is, the operating speed of the motor 13 corresponds to the operating speed Operator’s behavior).

如圖1所示，所述馬達13主要是安裝於縫紉機主軸14上，通過馬達13的運轉，可帶動縫紉機主軸14控制縫紉機1上的縫紉構件(容後詳述)，藉此實現縫紉動作。本發明中，馬達13的運轉速度即對應至所述縫紉構件的運作效率(於一定範圍內，馬達13的運轉速度越快，代表縫紉構件能達成的運作效率越高)。 As shown in FIG. 1, the motor 13 is mainly installed on the main shaft 14 of the sewing machine. Through the operation of the motor 13, the main shaft 14 of the sewing machine can be driven to control the sewing components (detailed later) on the sewing machine 1 to realize the sewing action. In the present invention, the operating speed of the motor 13 corresponds to the operating efficiency of the sewing component (within a certain range, the faster the operating speed of the motor 13 is, the higher the operating efficiency that the sewing component can achieve).

本發明的其中一項技術特徵在於，當縫紉機1對布料(如圖2所示的布料4)進行縫紉動作時，控制單元10可主動或被動地控制布料感測單元15持續感測布料4的當前厚度，並且於感測到布料4的厚度改變時切換縫紉機1的所述控制權。 One of the technical features of the present invention is that when the sewing machine 1 performs a sewing action on the cloth (the cloth 4 shown in FIG. 2), the control unit 10 can actively or passively control the cloth sensing unit 15 to continuously sense the cloth 4 The current thickness, and the control right of the sewing machine 1 is switched when the thickness of the cloth 4 is sensed to change.

具體地，本發明的縫紉機1可將運作模式至少區分為正常運作模式以及限制運作模式。於正常運作模式下，控制單元10會將縫紉機1的控制權交給操作介面11(即，使用者可全權控制線紉機1)，換句話說，使用者可通過操作介面11直接控制馬達13的運轉速度，藉此控制縫紉機1整體的運作效率。 Specifically, the sewing machine 1 of the present invention can divide the operation mode into at least a normal operation mode and a restricted operation mode. In the normal operation mode, the control unit 10 transfers the control right of the sewing machine 1 to the operation interface 11 (that is, the user has full control of the sewing machine 1), in other words, the user can directly control the motor 13 through the operation interface 11 To control the overall operating efficiency of the sewing machine 1.

如前文所述，若布料4的厚度太厚，則當縫紉機1以較高的運轉速度運作時，可能會造成縫針(如圖2所示的縫針22)的斷裂。本發明中，控制單元10係控制所述布料感測單元15持續感測布料4的厚度，於布料4的厚度沒有改變(即，與初始厚度相同)或是未超出預設的門檻值時，令縫紉機1運作於上述正常運作模式(即，將控制權交給操作介面11)。並且，控制單元10於布料感測單元15感測到布料4的厚度改變(即，相異於初始厚度)或是超出門檻值時，令縫紉機1運作於所述限制運作模式。 As mentioned above, if the thickness of the cloth 4 is too thick, when the sewing machine 1 operates at a higher operating speed, the stitches (the stitches 22 shown in FIG. 2) may break. In the present invention, the control unit 10 controls the cloth sensing unit 15 to continuously sense the thickness of the cloth 4, when the thickness of the cloth 4 does not change (that is, the same as the initial thickness) or does not exceed a preset threshold value, Make the sewing machine 1 operate in the above-mentioned normal operation mode (that is, transfer the control right to the operation interface 11). Moreover, the control unit 10 causes the sewing machine 1 to operate in the restricted operation mode when the cloth sensing unit 15 senses that the thickness of the cloth 4 changes (ie, is different from the initial thickness) or exceeds the threshold value.

於所述限制運作模式中，控制單元10主要是將縫紉機1的控制權從操作介面11移轉至控制單元10，以由控制單元10本身依照預設的腳本控制馬達13的運轉速度，藉此將縫紉機1限制在一個特定運作效率。換句話說，當縫紉機1處於所述限制運作模式時，無論使用者在操作介面11上進行了什麼樣的操作行為，馬達驅動單元12皆只會聽從控制單元10的命令而使得馬達13運轉在一個特定運轉速度。 In the restricted operation mode, the control unit 10 mainly transfers the control right of the sewing machine 1 from the operation interface 11 to the control unit 10, so that the control unit 10 itself controls the operating speed of the motor 13 according to a preset script, thereby Limit the sewing machine 1 to a specific operating efficiency. In other words, when the sewing machine 1 is in the restricted operation mode, no matter what kind of operation the user performs on the operation interface 11, the motor drive unit 12 will only follow the commands of the control unit 10 to make the motor 13 operate at A specific operating speed.

於一實施例中，所述特定運轉速度指的是在布料4的當前厚度下，不會造成縫針22斷裂的最快運轉速度。上述特定運轉速度可由縫紉機1的製造商經過大量實驗測試後所得出，並且直接記錄於控制單元10的韌體中，但不以此為限。 In one embodiment, the specific operating speed refers to the fastest operating speed that does not cause the needle 22 to break under the current thickness of the cloth 4. The above-mentioned specific operating speed can be obtained by the manufacturer of the sewing machine 1 after a large number of experimental tests, and is directly recorded in the firmware of the control unit 10, but is not limited to this.

具體地，當控制單元10從布料感測單元15取得布料4的相關資訊，並且判斷布料4的當前厚度改變，或是當前厚度超出了預設的門檻值時，會自動向操作介面11取回縫紉機1的控制權，並且自動產生一組減速訊號，同時將所產生的減速訊號傳送至馬達驅動單元12。本實施例中，所述門檻值對應至布料4的一個特定厚度，當縫紉機1的馬達13運轉於最高運轉速度且布料4超過所述特定厚度時，將會造成縫針22的斷裂。 Specifically, when the control unit 10 obtains the relevant information of the cloth 4 from the cloth sensing unit 15, and determines that the current thickness of the cloth 4 has changed, or the current thickness exceeds the preset threshold value, it will automatically retrieve it from the operating interface 11. The sewing machine 1 has the control right, and automatically generates a set of deceleration signals, and at the same time transmits the generated deceleration signals to the motor drive unit 12. In this embodiment, the threshold value corresponds to a specific thickness of the cloth 4, and when the motor 13 of the sewing machine 1 runs at the highest operating speed and the cloth 4 exceeds the specific thickness, the needle 22 will break.

於所述限制運作模式下，由於控制權屬於控制單元10，因此馬達驅動單元12接收具有控制權的控制單元10所發出的所述減速訊號後，會以減速訊號取代原先取得的操作訊號(或直接捨棄操作訊號)，並且依據減速訊號的內容來修改馬達13的運轉速度(即，修改輸出的電力大小)，藉此令馬達13的運轉速度符合限制運作模式的需求。 In the restricted operation mode, since the control right belongs to the control unit 10, the motor drive unit 12 receives the deceleration signal sent by the control unit 10 with the control right, and replaces the previously obtained operation signal (or The operation signal is directly discarded), and the operating speed of the motor 13 is modified according to the content of the deceleration signal (that is, the output power is modified), so that the operating speed of the motor 13 meets the requirements of the restricted operation mode.

於一實施例中，控制單元10在每次進入限制運作模式時所產生的減速訊號都是相同的，藉此，馬達驅動單元12每次收到減速訊號後都會驅動馬達13運轉在相同的運轉速度。於另一實施例中，控制單元10在進入限制運作模式後，可依據布料4的當前厚度來產生對應內容的減速訊號，藉此，馬達驅動單元12可驅動馬達13運轉在不會造成縫針22斷裂的最快運轉速度。 In one embodiment, the deceleration signal generated by the control unit 10 is the same every time it enters the restricted operation mode, so that the motor drive unit 12 will drive the motor 13 to run in the same operation every time the motor drive unit 12 receives the deceleration signal. speed. In another embodiment, after the control unit 10 enters the restricted operation mode, it can generate a deceleration signal corresponding to the content according to the current thickness of the cloth 4, so that the motor drive unit 12 can drive the motor 13 to run without causing the stitch 22 The fastest running speed of the fracture.

具體地，所述控制單元10可內含一個演算法101，所述演算法101可以取得布料感測單元15的感測訊號，並且對感測訊號進行運算以判斷布料4 的當前厚度。進一步，所述演算法101還可依據當前厚度執行查表運算(lookup table)，藉此產生具有可對應至當前厚度的內容的所述減速訊號。如此一來，控制單元10可通過減速訊號的產生與發送來令馬達13運轉在最適當的運轉速度。惟，上述僅為本發明的具體實施範例，但不應以上述者為限。 Specifically, the control unit 10 may contain an algorithm 101, and the algorithm 101 may obtain the sensing signal of the cloth sensing unit 15 and perform operations on the sensing signal to determine the cloth 4 The current thickness. Further, the algorithm 101 can also perform a lookup table based on the current thickness, thereby generating the deceleration signal with content corresponding to the current thickness. In this way, the control unit 10 can generate and send the deceleration signal to make the motor 13 run at the most appropriate operating speed. However, the above are only specific implementation examples of the present invention, but should not be limited to the above.

本發明中，無論處於所述正常運作模式或是限制運作模式，控制單元10都會持續取得布料感測單元15的感測訊號。當縫紉機1運作於所述限制運作模式，且控制單元10藉由感測訊號判斷布料4的當前厚度已經恢復至所述門檻值內時，即可將縫紉機1的控制權歸還給操作介面11(即，令使用者可通過操作介面11重新掌握縫紉機1的控制權)，使得縫紉機1恢復至所述正常運作模式。 In the present invention, regardless of the normal operation mode or the restricted operation mode, the control unit 10 will continuously obtain the sensing signal of the cloth sensing unit 15. When the sewing machine 1 is operating in the restricted operation mode, and the control unit 10 uses the sensing signal to determine that the current thickness of the fabric 4 has returned to the threshold value, the control right of the sewing machine 1 can be returned to the operating interface 11 ( That is, the user can regain control of the sewing machine 1 through the operation interface 11), so that the sewing machine 1 can be restored to the normal operation mode.

具體地，當布料4的當前厚度恢復至門檻值內時，代表布料4的厚度變薄，且縫紉機1不再具有縫針22斷裂的風險，因此，控制單元10可允許使用者自行控制馬達13的運轉速度，即，允許使用者自行調控縫紉機1的運作效率。當控制權歸還給操作介面11後，控制單元10停止產生並發送所述減速訊號。並且，控制單元10持續自操作介面11接收因使用者的操作行為而產生的所述控制指令，並且依據控制指令的內容重新產生所述操作訊號。所述馬達驅動單元12在縫紉機1恢復至正常運作模式後，即可捨棄前述的減速訊號，並且依據控制單元10再次發出的操作訊號來調整輸出電力，藉此恢復馬達13的運轉速度。 Specifically, when the current thickness of the cloth 4 returns to within the threshold value, it means that the thickness of the cloth 4 becomes thinner, and the sewing machine 1 no longer has the risk of breaking the needle 22. Therefore, the control unit 10 allows the user to control the motor 13 by himself The operating speed, that is, allows the user to adjust the operating efficiency of the sewing machine 1 by himself. When the control right is returned to the operation interface 11, the control unit 10 stops generating and sending the deceleration signal. In addition, the control unit 10 continuously receives the control instruction generated by the user's operation behavior from the operation interface 11, and regenerates the operation signal according to the content of the control instruction. The motor drive unit 12 can discard the aforementioned deceleration signal after the sewing machine 1 returns to the normal operation mode, and adjust the output power according to the operation signal issued by the control unit 10 again, thereby restoring the operating speed of the motor 13.

如圖1所示，本發明的縫紉機1還具有電性連接控制單元10的設定介面16及顯示介面17。所述設定介面16可接受使用者的操控，以設定縫紉機1相關的系統控制參數，使得縫紉機1可以適用於各種狀態的系統自動控制需求。所述顯示介面17可用以顯示使用者通過設定介面16所進行的各項設定，以令使用者清楚瞭解目前的各項系統控制參數。上述的設定介面16與顯示介面17可分別為實體介面或虛擬介面，不加以限定。 As shown in FIG. 1, the sewing machine 1 of the present invention also has a setting interface 16 and a display interface 17 electrically connected to the control unit 10. The setting interface 16 can be manipulated by the user to set the system control parameters related to the sewing machine 1, so that the sewing machine 1 can be applied to automatic system control in various states. demand. The display interface 17 can be used to display various settings made by the user through the setting interface 16, so that the user can clearly understand the current system control parameters. The above-mentioned setting interface 16 and display interface 17 can be a physical interface or a virtual interface, respectively, and are not limited.

續請參閱圖2，為本發明的縫紉機運作示意圖的第一具體實施例。 Please continue to refer to FIG. 2, which is a first embodiment of the operation schematic diagram of the sewing machine of the present invention.

如圖2所示，本發明的縫紉機1還具有水平設置的一個平台18，所述平台18用以放置要進行縫紉的所述布料4。如前文所述，縫紉機1的馬達13主要是安裝於縫紉機主軸14中，並且縫紉機主軸14藉由連動構件(圖未標示)連接垂直與平台18設置的針棒21，針棒21於靠***台18的一端設置有所述縫針22。當馬達13運轉時可帶動縫紉機主軸14，並且縫紉機主軸14可帶動針棒21與縫針22進行上下運動，藉此通過縫針22對平台18上的布料4進行縫紉動作。 As shown in Fig. 2, the sewing machine 1 of the present invention also has a horizontally arranged platform 18 for placing the cloth 4 to be sewn. As mentioned above, the motor 13 of the sewing machine 1 is mainly installed in the main shaft 14 of the sewing machine, and the main shaft 14 of the sewing machine is connected to the needle bar 21 arranged perpendicularly to the platform 18 by a linkage member (not shown in the figure). The needle bar 21 is close to the platform 18. Said needle 22 is provided at one end of the device. When the motor 13 is running, the main shaft 14 of the sewing machine can be driven, and the main shaft 14 of the sewing machine can drive the needle bar 21 and the sewing needle 22 to move up and down, thereby sewing the cloth 4 on the platform 18 through the sewing needle 22.

如圖2所示，所述平台18的底面設置有送布牙19，所述送布牙19可穿透平台18底面而接觸布料4。在縫紉機1運作時，送布牙19受控沿著第一方向(即，圖2中的箭頭方向)轉動，以將平台18上的布料4朝第一方向推送。平台18的頂面還設置有抬壓腳機構3，所述抬壓腳機構3受控以一定的貼壓力量將布料4貼壓於送布牙19上，並且抬壓腳機構3會送著布料4的推送而產生位移(主要為上下方向的位移)。 As shown in FIG. 2, the bottom surface of the platform 18 is provided with feeding teeth 19, and the feeding teeth 19 can penetrate the bottom surface of the platform 18 and contact the cloth 4. When the sewing machine 1 is operating, the feeding dog 19 is controlled to rotate along the first direction (ie, the arrow direction in FIG. 2) to push the cloth 4 on the platform 18 in the first direction. The top surface of the platform 18 is also provided with a presser foot lifting mechanism 3, the presser foot lifting mechanism 3 is controlled to press the cloth 4 on the feed dog 19 with a certain amount of pressure, and the presser foot mechanism 3 will send The pushing of the cloth 4 causes displacement (mainly displacement in the up and down direction).

於一實施例中，本發明的布料感測單元15設置在縫紉機1上的適當位置，並通過機械或電子方式感測所述抬壓腳機構3的位移量(例如與抬壓腳機構3直接連接或電性連接)。更具體地，所述布料4被夾在抬壓腳機構3與送布牙19之間，故抬壓腳機構3底面與送布牙19頂面間的高度即為布料4的當前厚度，也是抬壓腳機構3於Z軸方向(即，上下方向)的位移量。也就是說，當布料4的當前厚度變厚時，抬壓腳機構3的位移量會增加，而當布料4的當前厚度變薄時，抬壓腳機構3的位移量會減少。 In one embodiment, the cloth sensing unit 15 of the present invention is set at an appropriate position on the sewing machine 1, and senses the displacement of the presser foot mechanism 3 through mechanical or electronic means (for example, directly with the presser foot mechanism 3). Connection or electrical connection). More specifically, the cloth 4 is sandwiched between the presser foot mechanism 3 and the feed dog 19, so the height between the bottom surface of the presser foot mechanism 3 and the top surface of the cloth feed dog 19 is the current thickness of the cloth 4, which is also The displacement amount of the presser foot mechanism 3 in the Z-axis direction (ie, the vertical direction). That is, when When the current thickness of the cloth 4 becomes thicker, the displacement of the presser foot mechanism 3 will increase, and when the current thickness of the cloth 4 becomes thinner, the displacement of the presser foot mechanism 3 will decrease.

請同時參閱圖3，為本發明的位移量訊號示意圖的第一具體實施例。圖3用以描述布料感測單元15所產生的電子訊號。本實施例中，布料感測單元15經過感測後所產生的電子訊號，是用來代表抬壓腳機構3的位移量的位移量訊號。 Please also refer to FIG. 3, which is a first specific embodiment of the schematic diagram of the displacement signal of the present invention. FIG. 3 is used to describe the electronic signal generated by the cloth sensing unit 15. In this embodiment, the electronic signal generated by the cloth sensing unit 15 after sensing is a displacement signal used to represent the displacement of the presser foot mechanism 3.

如圖3所示，當布料4的厚度改變時(圖3中以變厚為例)，布料感測單元15產生的位移量訊號即隨著抬壓腳機構3的位移量提昇而大幅改變。本發明中，所述控制單元10持續接收布料感測單元15感測後產生的電子訊號，並且通過演算法101對電子訊號進行分析與運算，藉此依據抬壓腳機構3的位移量來計算出布料4的當前厚度。如此一來，控制單元10可依據布料4的當前厚度決定要令縫紉機1維持運作在正常運作模式，或是切換至限制運作模式。 As shown in FIG. 3, when the thickness of the cloth 4 changes (in FIG. 3, the thickness is increased as an example), the displacement signal generated by the cloth sensing unit 15 changes greatly as the displacement of the presser foot lifting mechanism 3 increases. In the present invention, the control unit 10 continuously receives the electronic signal generated by the cloth sensing unit 15 and analyzes and calculates the electronic signal through the algorithm 101, thereby calculating according to the displacement of the presser foot mechanism 3. The current thickness of fabric 4 is displayed. In this way, the control unit 10 can determine whether to maintain the sewing machine 1 in the normal operation mode or switch to the restricted operation mode according to the current thickness of the fabric 4.

於一實施例中，控制單元10只要依據所述位移量訊號判斷布料4的厚度改變，並且是厚度變厚時，即控制縫紉機1進入所述限制運作模式(即，收回操作介面11的控制權)。並且，控制單元10於依據所述位移量訊號判斷布料4的厚度再次改變，並且是厚度變薄時，控制縫紉機1恢復所述正常運作模式(即，歸還控制權給操作介面11)。 In one embodiment, as long as the control unit 10 determines that the thickness of the cloth 4 changes according to the displacement signal, and when the thickness becomes thicker, it controls the sewing machine 1 to enter the restricted operation mode (ie, withdraw the control right of the operation interface 11) ). In addition, when the control unit 10 determines that the thickness of the cloth 4 changes again according to the displacement signal, and the thickness becomes thinner, the control unit 10 controls the sewing machine 1 to resume the normal operation mode (ie, return the control right to the operation interface 11).

於另一實施例中，控制單元10可預設一個門檻值(例如對應至位移範圍的位移門檻值，或是對應至厚度範圍的厚度門檻值)。當控制單元10依據位移量訊號判斷布料4的厚度改變，並且改變後的厚度大於所述門檻值時，控制縫紉機1進入所述限制運作模式。並且，當控制單元10依據位移量訊號判斷布料4的厚度改變，並且改變後的厚度恢復至門檻值內時，控制縫紉機1恢復所述正常運作模式。 In another embodiment, the control unit 10 may preset a threshold value (for example, the displacement threshold value corresponding to the displacement range, or the thickness threshold value corresponding to the thickness range). When the control unit 10 determines that the thickness of the cloth 4 changes according to the displacement signal, and the thickness after the change is greater than the threshold value, the sewing machine 1 is controlled to enter the restricted operation mode. And, when the control unit 10 judges the cloth according to the displacement signal When the thickness of the material 4 changes and the changed thickness returns to the threshold value, the sewing machine 1 is controlled to resume the normal operation mode.

回到圖2。所述抬壓腳機構3主要包括了可垂直於平台18進行上下方向移動的傳動軸31、設置於傳動軸上靠***台18的一端的樞軸32、以及通過樞軸樞接於傳動軸31並可基於樞軸32搖擺的壓布元件33。本實施例中，抬壓腳機構3主要是通過壓布元件33將布料4貼壓於送布牙19上。本實施例中所指的抬壓腳機構3與送布牙19間的距離，指的是壓布元件33的底面與送布牙19的頂面間的距離。 Back to Figure 2. The presser foot lifting mechanism 3 mainly includes a transmission shaft 31 that can move up and down perpendicular to the platform 18, a pivot 32 arranged on the end of the transmission shaft close to the platform 18, and a pivotal connection to the transmission shaft 31 through the pivot. A cloth pressing element 33 that can swing based on a pivot 32. In this embodiment, the presser foot raising mechanism 3 mainly presses the cloth 4 on the cloth feed dog 19 through the cloth pressing element 33. In this embodiment, the distance between the presser foot mechanism 3 and the feeding dog 19 refers to the distance between the bottom surface of the cloth pressing element 33 and the top surface of the feeding dog 19.

於一實施例中，所述布料感測單元15主要是持續感測壓布元件33與送布牙19間的相對高度變化量，即，布料感測單元15所產生的電子訊號，亦可為代表高度變化量的變化量訊號。所述控制單元10從布料感測單元15接收所述電子訊號後，即可通過演算法101對電子訊號(即，所述相對高度變化量)進行分析與運算，進而得到布料4的當前厚度。 In one embodiment, the cloth sensing unit 15 mainly continuously senses the relative height change between the cloth pressing element 33 and the feed dog 19, that is, the electronic signal generated by the cloth sensing unit 15 may also be A change signal representing the change in height. After the control unit 10 receives the electronic signal from the cloth sensing unit 15, it can analyze and calculate the electronic signal (ie, the relative height change) through the algorithm 101 to obtain the current thickness of the cloth 4.

如圖2所示，由於抬壓腳機構3經由壓布元件33將布料4貼壓於送布牙19上，因此壓布元件33與送布牙19間的距離(即，第一高度H1)即為布料4的當前厚度。當布料4變厚時，壓布元件33與送布牙19間的距離會變更為第二高度H2。本實施例中，所述布料感測單元15是感測第二高度H2相對於第一高度H1的變化量，並依據此變化量來產生所述電子訊號。 As shown in FIG. 2, since the presser foot mechanism 3 presses the cloth 4 on the feed dog 19 via the cloth presser 33, the distance between the presser 33 and the feed dog 19 (ie, the first height H1) That is the current thickness of the cloth 4. When the cloth 4 becomes thicker, the distance between the cloth pressing element 33 and the feed dog 19 is changed to the second height H2. In this embodiment, the cloth sensing unit 15 senses the change amount of the second height H2 relative to the first height H1, and generates the electronic signal according to the change amount.

於上述實施例中，控制單元10可以在壓布元件33與送布牙19間的距離為第一高度H1時，判斷布料4的當前厚度位於門檻值內，因此令縫紉機1維持在正常運作模式。當壓布元件33與送布牙19間的距離變更為第二高度H2時，控制單元10可判斷布料4的當前厚度改變且超過門檻值，因此令縫紉機1 進入限制運作模式。而當壓布元件33與送布牙19間的距離由第二高度H2變回第一高度H1時，控制單元10可判斷布料4的當前厚度恢復至門檻值內，因此令縫紉機1恢復至正常運作模式。由此可看出，通過本發明的技術方案，確實可在不仰賴使用者的高度專注力及反應力的前提下，以縫紉機1的自動控制程序來維持縫紉機1的運作效率並同時避免縫針22斷裂的風險，實相當便利。 In the above embodiment, the control unit 10 can determine that the current thickness of the fabric 4 is within the threshold value when the distance between the cloth pressing element 33 and the feed dog 19 is the first height H1, so that the sewing machine 1 is maintained in the normal operation mode . When the distance between the cloth pressing element 33 and the feeding dog 19 is changed to the second height H2, the control unit 10 can determine that the current thickness of the cloth 4 has changed and exceeds the threshold value, so that the sewing machine 1 Enter restricted operation mode. When the distance between the cloth pressing element 33 and the feeding dog 19 is changed from the second height H2 to the first height H1, the control unit 10 can determine that the current thickness of the cloth 4 has returned to the threshold value, thus returning the sewing machine 1 to normal Mode of operation. It can be seen that through the technical solution of the present invention, the automatic control program of the sewing machine 1 can be used to maintain the operating efficiency of the sewing machine 1 while avoiding the stitches 22 without relying on the user's high concentration and responsiveness. The risk of breakage is actually quite convenient.

續請參閱圖4，為本發明的控制流程圖的第一具體實施例。本發明進一步揭露了一種自動控制方法，所述自動控制方法主要應用於如圖1及圖2所示的縫紉機1。通過本發明的自動控制方法，縫紉機1的使用者可以不需付出高度的專注力及反應能力，而可由縫紉機1自行監控布料的當前厚度，並且依據當前厚度來自動限制馬達的運轉速度，藉此避免因布料過厚且馬達的運轉速度過快而造成縫針斷裂的問題。 Please continue to refer to FIG. 4, which is the first specific embodiment of the control flowchart of the present invention. The present invention further discloses an automatic control method, which is mainly applied to the sewing machine 1 shown in FIGS. 1 and 2. Through the automatic control method of the present invention, the user of the sewing machine 1 can monitor the current thickness of the fabric by itself without paying a high degree of concentration and reaction ability, and automatically limit the operating speed of the motor according to the current thickness, thereby Avoid the problem of needle breakage caused by thick fabric and too fast motor speed.

如圖4所示，要使用本發明的自動控制方法，首先使用者需啟動所述縫紉機1(步驟S10)。於縫紉機1啟動後，所述控制單元10即控制布料感測單元15持續感測布料4的當前厚度(步驟S12)。於一實施例中，布料感測單元15於步驟S12中是感測所述抬壓腳機構3的位移量變化，並且控制單元10依據位移量變化來計算布料4的當前厚度。於另一實施例中，布料感測單元15於步驟S12中是感測所述壓布元件33與送布牙19間的相對高度變化量，並且控制單元10依據相對高度變化量來計算布料4的當前厚度。 As shown in Fig. 4, to use the automatic control method of the present invention, the user first needs to start the sewing machine 1 (step S10). After the sewing machine 1 is started, the control unit 10 controls the cloth sensing unit 15 to continuously sense the current thickness of the cloth 4 (step S12). In an embodiment, the cloth sensing unit 15 senses the change in displacement of the presser foot lifting mechanism 3 in step S12, and the control unit 10 calculates the current thickness of the cloth 4 according to the change in displacement. In another embodiment, the cloth sensing unit 15 senses the relative height change between the cloth pressing element 33 and the feed dog 19 in step S12, and the control unit 10 calculates the cloth 4 according to the relative height change. The current thickness.

值得一提的是，控制單元10可以在縫紉機1通電啟動後，自動控制布料感測單元15開始對布料4進行感測，或是在使用者觸發了縫紉機1的感測功能後，再依據使用者的控制來致能布料感測單元15，不加以限定。 It is worth mentioning that the control unit 10 can automatically control the fabric sensing unit 15 to start sensing the fabric 4 after the sewing machine 1 is powered on, or after the user triggers the sensing function of the sewing machine 1, according to the use The control of the person is to enable the cloth sensing unit 15 and is not limited.

控制單元10持續接收布料感測單元15感測後產生的電子訊號，依據電子訊號的內容計算布料4的當前厚度，並且判斷布料4的當前厚度是否超出預設的門檻值(步驟S14)。於一實施例中，所述門檻值為在馬達13的最高運轉速度下，可能會造成縫針22斷裂的布料厚度。惟，上述僅為本發明的其中一個實施範例，不應以此為限。 The control unit 10 continuously receives the electronic signal generated by the cloth sensing unit 15, calculates the current thickness of the cloth 4 according to the content of the electronic signal, and determines whether the current thickness of the cloth 4 exceeds a preset threshold value (step S14). In one embodiment, the threshold value is the thickness of the cloth that may cause the stitch 22 to break under the maximum operating speed of the motor 13. However, the above is only one of the implementation examples of the present invention, and should not be limited thereto.

若布料4的當前厚度沒有超出所述門檻值，則於本實施例中，控制單元10會將縫紉機1的控制權交給操作介面11(步驟S16)，即，令縫紉機1處於所述正常運作模式。於正常運作模式下，使用者可以通過操作介面11對縫紉機1進行全面的控制，即，使用者可以任意調整馬達13的運轉速度(即，縫紉機1的運作效率)。 If the current thickness of the fabric 4 does not exceed the threshold value, in this embodiment, the control unit 10 transfers the control of the sewing machine 1 to the operation interface 11 (step S16), that is, the sewing machine 1 is in the normal operation mode. In the normal operation mode, the user can fully control the sewing machine 1 through the operating interface 11, that is, the user can arbitrarily adjust the operating speed of the motor 13 (ie, the operating efficiency of the sewing machine 1).

於正常運作模式下，控制單元10會通過操作介面11持續接收因使用者的操作行為所產生的控制指令(步驟S18)，並且依據控制指令的內容來產生對應的操作訊號，再將所產生的操作訊號傳送至馬達驅動單元12(步驟S20)。馬達驅動單元12可從控制單元10接收所述操作訊號，並且依據操作訊號的內容輸出對應的電力至馬達13，以控制馬達13的運轉速度，使得馬達13的運轉速度符合使用者的操作行為(步驟S22)。 In the normal operation mode, the control unit 10 will continue to receive the control commands generated by the user's operation behavior through the operation interface 11 (step S18), and generate corresponding operation signals according to the content of the control commands, and then transfer the generated The operation signal is transmitted to the motor drive unit 12 (step S20). The motor drive unit 12 can receive the operating signal from the control unit 10, and output corresponding power to the motor 13 according to the content of the operating signal to control the operating speed of the motor 13 so that the operating speed of the motor 13 conforms to the user's operating behavior ( Step S22).

若於步驟S14中判斷布料4的當前厚度超出了所述門檻值，則控制單元10會從操作介面11處取回縫紉機1的控制權(S24)，以令縫紉機1從正常運作模式進入所述限制運作模式。於所述限制運作模式下，控制單元10會依據預設的腳本自動產生一個減速訊號，並且傳送減速訊號至馬達驅動單元12(步驟S26)。馬達驅動單元12從控制單元10接收所述減速訊號後，會以減速訊號取代先前取得的操作訊號並據以修改輸出電力，藉此修改馬達13的運轉速度，使得馬達13的運轉速度符合控制單元10發出的減速訊號的內容(步驟S28)。 If it is determined in step S14 that the current thickness of the fabric 4 exceeds the threshold value, the control unit 10 will retrieve the control right of the sewing machine 1 from the operation interface 11 (S24), so that the sewing machine 1 enters the said from the normal operation mode. Restrict the mode of operation. In the restricted operation mode, the control unit 10 automatically generates a deceleration signal according to a preset script, and transmits the deceleration signal to the motor driving unit 12 (step S26). After the motor drive unit 12 receives the deceleration signal from the control unit 10, it will take the deceleration signal Substituting the previously obtained operating signal and modifying the output power accordingly, thereby modifying the operating speed of the motor 13 so that the operating speed of the motor 13 conforms to the content of the deceleration signal issued by the control unit 10 (step S28).

值得一提的是，於所述限制運作模式下，使用者仍可持續對操作介面11進行操作，並且操作介面11可依據使用者的操作行為持續產生並發出所述控制指令。然而，因為在限制運作模式時縫紉機1的控制權在控制單元10上，因此控制單元10會無視於操作介面11發出的控制指令(或是於接收後捨棄控制指令)，並以自身產生的減速訊號來對馬達驅動單元12進行控制。 It is worth mentioning that in the restricted operation mode, the user can still continue to operate the operating interface 11, and the operating interface 11 can continuously generate and issue the control command according to the user's operating behavior. However, because the control of the sewing machine 1 is on the control unit 10 in the restricted operation mode, the control unit 10 ignores the control commands issued by the operation interface 11 (or discards the control commands after receiving them), and decelerates by itself. The signal is used to control the motor drive unit 12.

本發明中，所述減速訊號的內容主要對應至在目前感測到的布料厚度下，不會造成縫針22斷裂的馬達13最高運轉速度。換句話說，只要馬達驅動單元12依據減速訊號的內容來控制馬達13的運轉速度，就不會有縫針22因布料4的當前厚度過厚而斷裂的情況產生。惟，上述僅為本發明的其中一個實施範例，不應以此為限。 In the present invention, the content of the deceleration signal mainly corresponds to the maximum operating speed of the motor 13 that does not cause the needle 22 to break under the currently sensed fabric thickness. In other words, as long as the motor drive unit 12 controls the operating speed of the motor 13 according to the content of the deceleration signal, the stitch 22 will not be broken due to the current thickness of the cloth 4 being too thick. However, the above is only one of the implementation examples of the present invention, and should not be limited thereto.

於一實施例中，控制單元10可以在每次進入限制運作模式後，都產生內容相同的減速訊號，藉此限制馬達13運轉於相同的運轉速度。 In one embodiment, the control unit 10 may generate a deceleration signal with the same content every time it enters the restricted operation mode, thereby restricting the motor 13 to operate at the same operating speed.

於另一實施例中，控制單元10可在進入限制運作模式後，通過演算法101對布料4的當前厚度進行運算，以取得在該厚度下不會造成縫針22斷裂的最高運轉速度，並且依該最高運轉速度來產生所述減速訊號。於此實施例中，雖然縫紉機1運作在限制運作模式，但馬達13仍可隨著布料4的當前厚度而改變其運轉速度，藉此有效地維持縫紉機1的運作效率。 In another embodiment, the control unit 10 may calculate the current thickness of the fabric 4 through the algorithm 101 after entering the restricted operation mode, so as to obtain the maximum operating speed that does not cause the needle 22 to break under the thickness, and according to The maximum operating speed is used to generate the deceleration signal. In this embodiment, although the sewing machine 1 is operating in the restricted operation mode, the motor 13 can still change its operating speed according to the current thickness of the cloth 4, thereby effectively maintaining the operating efficiency of the sewing machine 1.

於縫紉機1的運作過程中，控制單元10持續判斷使用者的操作是否結束(步驟S30)，並且於操作結束前持續執行前述步驟S12至步驟S28，以令縫紉機1依據布料4的當前厚度反覆地於由使用者控制馬達轉速的正常運作模式和由系統自動控制馬達轉速的限制運作模式之間進行動態切換。 During the operation of the sewing machine 1, the control unit 10 continues to determine whether the user's operation is over (step S30), and continues to execute the aforementioned steps S12 to S28 before the end of the operation to make The sewing machine 1 dynamically switches between the normal operation mode in which the motor speed is controlled by the user and the limited operation mode in which the motor speed is automatically controlled by the system according to the current thickness of the cloth 4.

值得一提的是，若縫紉機1運作於所述限制運作模式，且控制單元10於步驟S14中判斷布料4的當前厚度恢復至門檻值內時，控制單元10會進一步將控制權歸還給操作介面11，並且依據操作介面11發出的控制指令來重新產生操作訊號。馬達驅動單元12在從控制單元10處取得所述操作訊號後，即可以操作訊號取代先前取得的減速訊號以修改輸出電力，藉此恢復馬達13的運轉速度，使得馬達13的運轉速度重新符合使用者的操作行為。 It is worth mentioning that if the sewing machine 1 is operating in the restricted operation mode, and the control unit 10 determines in step S14 that the current thickness of the fabric 4 is restored to the threshold value, the control unit 10 will further return the control right to the operating interface 11, and regenerate the operation signal according to the control command issued by the operation interface 11. After the motor drive unit 12 obtains the operating signal from the control unit 10, the operating signal can replace the previously obtained deceleration signal to modify the output power, thereby restoring the operating speed of the motor 13 so that the operating speed of the motor 13 is in line with the use Operator’s behavior.

通過本發明的自動控制方法，縫紉機可以在布料的厚度較薄時令使用者完全掌握縫紉機1的控制權，以得到最佳的運作效率；而在布料變厚時，縫紉機可自動控制並限制馬達的運轉速度，藉此在不過度仰賴使用者的專注力及反應力的前提下，以自動控制的方式避免縫針斷裂的問題。 Through the automatic control method of the present invention, the sewing machine can enable the user to fully control the control of the sewing machine 1 when the thickness of the cloth is thin, so as to obtain the best operating efficiency; and when the cloth becomes thicker, the sewing machine can automatically control and limit the motor The speed of operation, so as to avoid the problem of needle breakage in an automatic control method without excessively relying on the user's concentration and reaction.

續請參閱圖5，為本發明的縫紉機運作示意圖的第二具體實施例。 Please continue to refer to FIG. 5, which is a second specific embodiment of the operation schematic diagram of the sewing machine of the present invention.

於前述實施例中，布料感測單元15主要是感測抬壓腳機構3的位移量(或相對高度變化量)並產生對應的電子訊號，藉此令控制單元10計算出布料4的當前厚度。本實施例揭露了另一種布料感測單元5，如圖5所示，所述布料感測單元5可為攝影機，而控制單元10的演算法101可為一種影像辨識演算法。。 In the foregoing embodiment, the cloth sensing unit 15 mainly senses the displacement (or relative height change) of the presser foot mechanism 3 and generates a corresponding electronic signal, thereby enabling the control unit 10 to calculate the current thickness of the cloth 4 . This embodiment discloses another cloth sensing unit 5. As shown in FIG. 5, the cloth sensing unit 5 may be a camera, and the algorithm 101 of the control unit 10 may be an image recognition algorithm. .

本實施例中，所述布料感測單元5主要可設置於平台18的一側，並且朝向布料4的放置位置進行影像擷取動作。控制單元10可於縫紉機1的運作過程中控制布料感測單元5持續擷取布料4的影像，並且控制單元10可通過影像辨識演算法對布料4的影像進行影像辨識，藉此依據辨識結果判斷布料4的當前厚度。 In this embodiment, the cloth sensing unit 5 may be mainly arranged on one side of the platform 18 and perform an image capturing action toward the placement position of the cloth 4. The control unit 10 can control the cloth sensing unit 5 to continuously capture images of the cloth 4 during the operation of the sewing machine 1, and the control unit 10 can pass The image recognition algorithm performs image recognition on the image of the cloth 4, thereby determining the current thickness of the cloth 4 according to the recognition result.

於一實施例中，控制單元10可從影像中擷取出布料4的影像，並對布料4的影像進行影像辨識以直接判斷布料4的當前厚度。於另一實施例中，控制單元10可從影像中擷取出所述壓布元件33與送布牙19的影像，對壓布元件33與送布牙19的影像進行影像辨識以判斷出壓布元件33與送布牙19間的相對高度，並且再依據相對高度來計算出布料4的當前厚度。 In one embodiment, the control unit 10 can extract an image of the cloth 4 from the image, and perform image recognition on the image of the cloth 4 to directly determine the current thickness of the cloth 4. In another embodiment, the control unit 10 can capture the images of the cloth pressing element 33 and the feeding dog 19 from the image, and perform image recognition on the images of the cloth pressing element 33 and the feeding dog 19 to determine the pressing cloth The relative height between the element 33 and the feeding dog 19, and the current thickness of the cloth 4 is calculated based on the relative height.

以上所述僅為本發明之較佳具體實例，非因此即侷限本發明之專利範圍，故舉凡運用本發明內容所為之等效變化，均同理皆包含於本發明之範圍內，合予陳明。 The above are only preferred specific examples of the present invention, and are not limited to the scope of the patent of the present invention. Therefore, all equivalent changes made by using the content of the present invention are included in the scope of the present invention in the same way. Bright.

1:縫紉機 1: Sewing machine

10:控制單元 10: Control unit

101:演算法 101: Algorithm

11:操作介面 11: Operation interface

12:馬達驅動單元 12: Motor drive unit

13:馬達 13: Motor

14:縫紉機主軸 14: Sewing machine spindle

15:布料感測單元 15: Cloth sensing unit

16:設定介面 16: Setting interface

17:顯示介面 17: display interface

Claims

一種具自動控制機制的縫紉機，用以對一布料進行縫紉動作，包括：一操作介面，接受一使用者的一外部操作以產生一控制指令；一控制單元，電性連接該操作介面，該控制單元於一正常運作模式下將該縫紉機的一控制權交給該操作介面，以接收該操作介面發出的該控制指令並產生對應的一操作訊號；一馬達；一馬達驅動單元，電性連接該控制單元及該馬達，依據該操作訊號控制該馬達的一運轉速度；及一布料感測單元，電性連接該控制單元，用以感測該布料的一當前厚度；其中，該控制單元於判斷該當前厚度落在一門檻值內時運作於該正常運作模式，並於判斷該當前厚度超過該門檻值時運作於一限制運作模式；其中，該控制單元於該限制運作模式下將該縫紉機的該控制權從該操作介面移轉至該控制單元，並且由該控制單元自動產生並發送一減速訊號至該馬達驅動單元，該馬達驅動單元以該減速訊號取代該操作訊號以修改該馬達的該運轉速度。 A sewing machine with an automatic control mechanism for sewing a piece of cloth includes: an operating interface that accepts an external operation from a user to generate a control instruction; a control unit electrically connected to the operating interface, the control The unit transfers a control right of the sewing machine to the operation interface in a normal operation mode to receive the control command sent by the operation interface and generate a corresponding operation signal; a motor; a motor drive unit, electrically connected to the The control unit and the motor control an operating speed of the motor according to the operation signal; and a cloth sensing unit electrically connected to the control unit for sensing a current thickness of the cloth; wherein the control unit determines When the current thickness falls within a threshold value, it operates in the normal operation mode, and when it is determined that the current thickness exceeds the threshold value, it operates in a restricted operation mode; wherein, the control unit operates in the restricted operation mode of the sewing machine The control right is transferred from the operation interface to the control unit, and the control unit automatically generates and sends a deceleration signal to the motor drive unit. The motor drive unit replaces the operation signal with the deceleration signal to modify the motor's Operating speed.

如請求項1所述的具自動控制機制的縫紉機，其中該控制單元於判斷該當前厚度落在該門檻值內時從該限制運作模式恢復成該正常運作模式並歸還該操作介面的該控制權給該操作介面，以依據該控制指令重新產生並發出該操作訊號，該馬達驅動單元依據該操作訊號恢復該馬達的該運轉速度。 The sewing machine with an automatic control mechanism according to claim 1, wherein when the control unit determines that the current thickness falls within the threshold value, the restricted operation mode is restored to the normal operation mode and the control right of the operation interface is returned The operation interface is provided to regenerate and issue the operation signal according to the control command, and the motor drive unit restores the operation speed of the motor according to the operation signal.

如請求項1所述的具自動控制機制的縫紉機，其中更包括：一平台，用以放置該布料；一送布牙，設置於該平台的底面，沿一方向轉動以將該布料朝該方向進行推送；及一抬壓腳機構，設置於該平台的頂面，以一貼壓力量將該布料貼壓於該送布牙上，並隨該布料的推送而產生位移。 The sewing machine with an automatic control mechanism according to claim 1, which further includes: a platform for placing the cloth; a feed dog arranged on the bottom surface of the platform and rotating in a direction to move the cloth toward the direction Pushing; and a presser foot mechanism, which is set on the top surface of the platform, presses the cloth on the feed dog with a pressure amount, and generates displacement with the push of the cloth.

如請求項3所述的具自動控制機制的縫紉機，其中該布料感測單元感測該抬壓腳機構的一位移量，並且該控制單元依據該位移量計算該布料的該當前厚度。 The sewing machine with an automatic control mechanism according to claim 3, wherein the cloth sensing unit senses a displacement of the presser foot lifting mechanism, and the control unit calculates the current thickness of the cloth according to the displacement.

如請求項3所述的具自動控制機制的縫紉機，其中該抬壓腳機構包括垂直於該平台進行上下移動的一傳動軸、設置於該傳動軸一端的一樞軸、及通過該樞軸樞接於該傳動軸並可基於該樞軸搖擺的一壓布元件，該布料感測單元感測該壓布元件與該送布牙間的一相對高度變化量，並且該控制單元依據該相對高度變化量計算該布料的該當前厚度。 The sewing machine with an automatic control mechanism according to claim 3, wherein the presser foot lifting mechanism includes a transmission shaft that moves up and down perpendicular to the platform, a pivot provided at one end of the transmission shaft, and a pivot through the pivot A cloth pressing element connected to the transmission shaft and capable of swinging based on the pivot, the cloth sensing unit senses a relative height change between the cloth pressing element and the feeding dog, and the control unit is based on the relative height The amount of change calculates the current thickness of the cloth.

如請求項3所述的具自動控制機制的縫紉機，其中該布料感測單元為一攝影機，該攝影機擷取該布料的一影像，並且該控制單元對該影像進行影像辨識以計算該布料的該當前厚度。 The sewing machine with an automatic control mechanism according to claim 3, wherein the cloth sensing unit is a camera, the camera captures an image of the cloth, and the control unit performs image recognition on the image to calculate the cloth The current thickness.

一種縫紉機的自動控制方法，運用於對一布料進行縫紉的一縫紉機，包括：a)由該縫紉機的一布料感測單元感測該布料的一當前厚度；b)通過該縫紉機的一操作介面接受一使用者的一外部操作並產生一控制指令； c)該縫紉機的一控制單元於一正常運作模式下將該縫紉機的一控制權交給該操作介面，以接收該控制指令，並依據該控制指令產生對應的一操作訊號；d)由該縫紉機的一馬達驅動單元接收該操作訊號，並依據該操作訊號控制一馬達的一運轉速度；e)該控制單元判斷該當前厚度是否超出一門檻值，其中，該控制單元於判斷該當前厚度落在該門檻值內時運作於該正常運作模式；f)該控制單元於判斷該當前厚度超出該門檻值時運作於一限制運作模式，於該限制運作模式下將該縫紉機的該控制權從該操作介面移轉至該控制單元，並且由該控制單元自動產生一減速訊號；及g)該馬達驅動單元以該減速訊號取代該操作訊號以修改該馬達的該運轉速度。 An automatic control method for a sewing machine, applied to a sewing machine for sewing a cloth, includes: a) sensing a current thickness of the cloth by a cloth sensing unit of the sewing machine; b) receiving through an operating interface of the sewing machine An external operation by a user and generating a control command; c) A control unit of the sewing machine transfers a control right of the sewing machine to the operation interface in a normal operation mode to receive the control command and generate a corresponding operation signal according to the control command; d) the sewing machine A motor drive unit of receives the operation signal and controls an operating speed of a motor according to the operation signal; e) the control unit determines whether the current thickness exceeds a threshold value, wherein the control unit determines that the current thickness falls within Operate in the normal operation mode when the threshold is within; f) the control unit operates in a restricted operation mode when judging that the current thickness exceeds the threshold, and the control of the sewing machine is removed from the operation in the restricted operation mode The interface is transferred to the control unit, and the control unit automatically generates a deceleration signal; and g) the motor drive unit replaces the operation signal with the deceleration signal to modify the operating speed of the motor.

如請求項7所述的自動控制方法，其中更包括下列步驟：h)該控制單元判斷該當前厚度恢復至該門檻值內時從該限制運作模式恢復成該正常運作模式並歸還該操作介面的該控制權給該操作介面；i)該控制單元依據該操作介面發出的該控制指令重新產生該操作訊號；及j)該馬達驅動單元依據該操作訊號恢復該馬達的該運轉速度。 The automatic control method according to claim 7, which further includes the following steps: h) when the control unit determines that the current thickness is restored to the threshold value, the limit operation mode is restored to the normal operation mode and the operation interface is returned The control right is given to the operation interface; i) the control unit regenerates the operation signal according to the control command issued by the operation interface; and j) the motor drive unit restores the operating speed of the motor according to the operation signal.

如請求項7所述的自動控制方法，其中該縫紉機更包括用以放置該布料的一平台、設置於該平台的底面的一送布牙、及設置於該平台的頂面且以一貼壓力量將該布料貼壓於該送布牙上的一抬壓腳機構；其中，該步驟e)是由該布料感測單元感測該抬壓腳機構因該布料的推送而產生的一位移量，並且由該控制單元依據該位移量計算該布料的該當前厚度。 The automatic control method according to claim 7, wherein the sewing machine further includes a platform for placing the cloth, a feed dog provided on the bottom surface of the platform, and a top surface of the platform with a pressing pressure A presser foot mechanism for pressing the cloth onto the feed dog; wherein, step e) is performed by the The cloth sensing unit senses a displacement of the presser foot mechanism due to the pushing of the cloth, and the control unit calculates the current thickness of the cloth according to the displacement.

如請求項7所述的自動控制方法，其中該縫紉機更包括用以放置該布料的一平台、設置於該平台的底面的一送布牙、及設置於該平台的頂面且以一貼壓力量將該布料貼壓於該送布牙上的一抬壓腳機構，該抬壓腳機構包括垂直於該平台進行上下移動的一傳動軸、設置於該傳動軸一端的一樞軸、及通過該樞軸樞接於該傳動軸的一壓布元件；其中，該步驟e)是由該布料感測單元感測該壓布元件與該送布牙間的一相對高度變化量，並且由該控制單元依據該相對高度變化量計算該布料的該當前厚度。 The automatic control method according to claim 7, wherein the sewing machine further includes a platform for placing the cloth, a feed dog provided on the bottom surface of the platform, and a top surface of the platform with a pressing pressure A presser foot lifting mechanism that presses the cloth onto the feed dog. The presser foot mechanism includes a drive shaft that moves up and down perpendicular to the platform, a pivot set at one end of the drive shaft, and The pivot is pivotally connected to a cloth pressing element of the transmission shaft; wherein, the step e) is that the cloth sensing unit senses a relative height change between the cloth pressing element and the cloth feed dog, and the The control unit calculates the current thickness of the cloth according to the relative height change.