1279974 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種車縫速度控制電路，尤指_ 式線圈感應與脈寬量測手段以對車縫速度進行有效 【先前技術】 目前工業用勒機馬達控制器的速度控制，係採 屢檢出控财式，·該餘係切車縫踏板的前踩量轉換為 :組在〇〜av間變化的類比電麼，其中，a係為_固定參 考電壓值，再由一類比/數位轉換器將此變化的類比電壓 轉換為-組介於〇〜N間的值，（N係由類比，數位轉換 器的解析位元數決定），藉由判斷該值的大小，來調整車 縫速度和動作的控制。 而目前廣泛用來偵測前踩量的元件有可變電阻和霍爾 (Hall)感應器；惟，這兩種檢出方式在使用實施上，至少 存在有如下所述的缺失及限制： 一、控制解析度受類比/數位轉換器的解析位元數影 響：一般類比/數位轉換器只有8個位元數，其所能表示 的數值範圍為0〜255，亦即只能劃分出256階的精度， 如要採用高位元數的類比/數位轉換器’則成本相對提 高。 二、可變電阻（VR)於實際使用時，會產生接觸式摩 擦，所以精度有限，元件的磨損也較為厲害，直接影響到 1279974 具使用壽命 印仗保用高度耐 到一定Ρ库卩士 ★人丄 I擦的可變電阻，當其損耗 J疋私度時，亦會有接觸不白 發生，又 * m m I 良而影響使用精確度的情形 心生，又，霍爾（Hal丨）感應器 容易受環境溫度影響精度、取4=格特殊之主動元件， 取诗不易且價格偏高。 容 内 明發 :於前述既有車縫踏板前踩量檢出方式之缺點… =目的在提供-種車縫速度控制電路，其係採用非在 y Λ 可ρ不文摩擦損耗的影響，且成^ 較為低廉，控制解析度高。 為達成前述目的採取的主要技術手段係令前述車縫s 度控制電路’主要包括有第-/第二反相比較電路及- 似控制量檢出電路；其中，該第―，第二反相比較◎ 係與縫幼機上的馬達控制器主控元件連接並受其控制，象 RLC控制1檢出電路中具有—可變電感器，該可變電感象 係由-與縫幼機腳踏板連接之感應棒及一感應線圈所愈 成’其電感值係隨著受腳踏板控制之感應棒伸人感應線塵 的深淺度而變化。 藉由上述設計，感應棒伸入感應線圈内部的深淺量因 使用者對腳踏板施壓力道的不同而產生變化，而使本電路 產生不同的電感值，由主控元件輸入之偵測訊號經本電路 轉換成不同分量的脈波寬度，送回主控元件中進行脈波寬 度計數處理，即可得到目前想要控制的動作及分量。 本舍明所和：供之車縫速度控制電路，可以獲得的點 1279974 及功效增進至少包括： 材料二本發明係採用成本低廉的線圈與導磁 件，取作為感測元件，兩者皆非特殊規格元 較，有助”造成：：貞習用的可變電組、霍爾元件相比 乂表k成本的降低。 觸j、使用壽命長且無摩擦耗損的限制：本發明以非接 ❹梓：圈及導磁材料所製成之感應棒作為感測元件，依 感應棒伸入線圈的生 干1Γ 獲致控制量檢出的^ ㈣磁係數改變，即可 壽命。Μ的功效’有效地降低損壞機率，延長使用 3、提高檢出解析度··本發 器做為脈寬計數…… 裔内建的計時 勒 击 般内建之計時器皆具有16個位元 度。可Μ分出65536階的精度，故可得較高的控制解析 φ 【實施方式】 =明：車縫速度控制電路係設於工業用縫幼機伺服 卜因使用者對腳踏板施以不同的踩踏壓力而 一不同之電感值’從而輸出不同寬度的脈波訊號，再進 :步對該脈波訊號進行脈寬計數，即可算出欲控制的分 首先，請參閱第-圖所示，本發明係藉由—虚縫 腳踏板連結之RLC控制量檢出電路（1〇)，以感知使用 者對腳踏板的施壓力道，其中，該RLC控制量檢出電路 1279974 - 二^具有—隨腳踏板受壓程度不同而改變其電感值的 …感器，該可變電感器係由—感應線圈（11)以及 」吉合於縫紉機腳踏板之感應棒（1 2 )所組成，其中， 4感應棒（i 2 )係以導磁材料所製成，且可為線型或弧 型，依使用者對縫匆機腳踏板的施壓力道不同 棒，=2)伸Μ應線圈（Uh料深淺量發^ 拴制里檢出電路（1 0 )之電感值亦隨之變 i化；其原理在於··當感應棒（1 2 )與感應線圈（i ) •之間有相對位置變動時，會造成感應線圈（Η )内的磁 通量產生變化，因士 门4產生一感應電流，該電流所產生的新 磁場會抵抗原磁場的變化量，以阻止 應線圈（1 1 )相對運動。 々有關本υ車縫速度控制電路之電路構造部分，請束 閱：二圖所示’前述之RLC控制量檢出電路（"）係藉 2一〆第二反相比較電路（2 1 ) / ( 2 2 )與縫纺機 零 a (圖中未不）之主控元件（3〇)構成 一迴路；又， _ RLC控制量檢出電路（1 〇)其係由-電阻R19、 、、、及可變電感器所組成，該可變電感器係由 -感應線圈（11)及一穿置於該感應線圈（ιι)内的 感應棒（1 2 )組成；該感應棒（丄2 )係結合於縫初機 之腳踏板上並控制其伸入感應線圈（1 1 )的程度，可變 電感器之電感值係隨著感應棒（1 2 )伸入感應線圈（1 1 )内的程度而變化； 7 1279974 該第一反相比較電路（2 1 )，係設於主控元件（3 〇)之輸出端與RLC控制量檢出電路（1 0)之輸入端 間； δ亥第_反相比較電路（2 2 )，係設⑤控制量檢 出兒路（1 0)之輸出端與主控元件（3〇)之輸出端 間； 於本實施例中，該第-/第二反相比較電路（2 i ) / (22)係由一内建四顆運算放大器之ίΜ324 成； 曰傅 W亥主抆兀件（3 0 )，其至少包含有-方波產生器 3 1 )用以輸出一偵測信號予第一反相比較電路（2 ^)，以及一計日夺器（丁丨_)(32)用以對第二 件 、雨之脈波訊號進行脈寬計數；由於主控元 〇)為既有工業用縫紉機伺服馬達控制器之基本元 電敗i非本發明主要標的所在，容不進—步贅述其詳細之 冤路構造。 攸知由上述§兄明可看出本發明之具體結構型態，至於其電1279974 IX. Description of the Invention: [Technical Field] The present invention relates to a sewing speed control circuit, in particular, a coil induction and a pulse width measuring means for effective sewing speed [Prior Art] Current Industry The speed control of the motor controller of the machine is used to detect the control type of the fuel. The front step of the sewing pedal is converted into: the analogy of the group changing between 〇~av, where a For the _ fixed reference voltage value, the analog voltage of this change is converted by a analog/digital converter into a value of -group between 〇 and N, (N is determined by the analogy, the number of resolution bits of the digital converter) By judging the magnitude of the value, the sewing speed and movement control are adjusted. At present, the components widely used for detecting the amount of the front step have a variable resistor and a Hall sensor; however, there are at least the following limitations and limitations in the implementation of the two detection methods: The control resolution is affected by the number of parsing bits of the analog/digital converter: the general analog/digital converter has only 8 bits, and the range of values that can be represented is 0~255, that is, only 256 steps can be divided. The accuracy, if you want to use high-order analog/digital converters', the cost is relatively high. Second, variable resistance (VR) in the actual use, will produce contact friction, so the accuracy is limited, the component wear is also more powerful, directly affecting 1279974 with the service life of the printed high security to a certain degree of gentleman ★ The variable resistance of the human 丄I wipe, when it is depleted of J 疋 private degree, there will also be contactless white, and * mm I good affects the use of precision, and Hall (Hal丨) induction The device is easily affected by the ambient temperature, taking 4% of the special active components, and it is difficult to obtain poetry and the price is high. Rong Nei Mingfa: The shortcomings of the above-mentioned method of detecting the amount of the sewn pedals in front of the above... The purpose is to provide a kind of sewing speed control circuit, which adopts the influence of friction loss not in y Λ The formation of ^ is relatively low, and the control resolution is high. The main technical means adopted for achieving the foregoing purpose is that the aforementioned sewing s degree control circuit 'mainly includes a first-/second second-phase comparison circuit and a similar control quantity detecting circuit; wherein the first and second inversions The comparison ◎ is connected to and controlled by the motor controller main control unit on the slitting machine, and has a variable inductor in the RLC control 1 detection circuit, and the variable inductance image is made by - and the slitting machine The induction rod and the induction coil connected to the pedal are made into a 'the inductance value varies according to the depth of the induction rod that is controlled by the pedal. With the above design, the amount of depth of the induction rod extending into the induction coil is changed by the pressure applied by the user to the pedal, and the circuit generates different inductance values, and the detection signal input by the main control unit is detected. After the circuit converts the pulse width into different components and sends it back to the main control component for pulse width counting, the action and component that you want to control can be obtained. Ben Sheming and: For the sewing speed control circuit, the point 1279974 and the improvement of the power can be obtained at least: Material 2 The invention uses low-cost coils and magnetic conductive members, which are used as sensing elements, neither of which The special specification element is helpful, which causes: "There is a reduction in the cost of the variable electric group and the Hall element compared with the Hall element. The contact j, the long service life and the frictionless wear limit: the invention is non-contact梓: The induction rod made of ring and magnetically permeable material is used as the sensing element. According to the stem of the induction rod protruding into the coil, the control quantity is detected. (4) The magnetic coefficient is changed, and the life can be achieved. Reduce the chance of damage, extend the use of 3, improve the resolution of the detection · · The hair is used as the pulse width count... The built-in time-stamped built-in timers all have 16 bits. Accuracy of 65536 steps, so high control analysis φ can be obtained. [Embodiment] = Ming: The sewing speed control circuit is set in the industrial sewing machine servo. Because the user applies different pedaling pressure to the pedal. a different inductance value' Pulse signals of different widths, and then: step the pulse width of the pulse signal to calculate the points to be controlled. First, as shown in the figure - the present invention is based on - a virtual stitching pedal The connected RLC control quantity detecting circuit (1〇) senses the user's pressure on the foot pedal, wherein the RLC control quantity detecting circuit 1279974 - has a different degree of pressure with the foot pedal a sensor that changes its inductance value. The variable inductor consists of an induction coil (11) and an induction rod (1 2 ) that is combined with a foot pedal of a sewing machine. Among them, 4 induction rods (i 2 ) ) is made of magnetically permeable material, and can be linear or curved. According to the user's pressure on the foot pedal of the sewing machine, the rod is different. = 2) The coil should be stretched (Uh material is shallow and shallow) ^ The inductance value of the detection circuit (10) in the system is also changed; the principle is that when the relative position between the induction rod (12) and the induction coil (i) is changed, the induction coil is caused. The magnetic flux in (Η) changes, and the gate 4 generates an induced current, and the new magnetic field generated by the current will resist the original The amount of change in the field is to prevent relative movement of the coil (1 1 ). 电路 For the circuit structure of the sewing speed control circuit of the υ, please refer to the following: 'The aforementioned RLC control quantity detection circuit (" The second phase comparison circuit (2 1 ) / ( 2 2 ) is combined with the main control element (3〇) of the sewing machine zero a (not shown) to form a loop; again, _ RLC control The quantity detecting circuit (1 〇) is composed of a resistor R19, , , and a variable inductor, and the variable inductor is connected to the induction coil (11) and a sensing coil (11) inside the sensor rod (1 2 ); the sensor rod (丄 2) is attached to the foot pedal of the sewing machine and controls its extent into the induction coil (1 1 ), variable inductor The inductance value varies with the extent to which the inductive rod (12) protrudes into the induction coil (1 1 ); 7 1279974 The first inversion comparison circuit (2 1 ) is provided in the main control element (3 〇) The output end is connected with the input end of the RLC control quantity detecting circuit (10); the δHai _inverting comparison circuit (2 2 ) is configured to detect the output end of the child control path (1 0) In the present embodiment, the first/second second inverting comparator circuit (2 i ) / (22) is formed by a built-in four operational amplifiers Μ 324; The W-home component (30) includes at least a square wave generator 3 1 for outputting a detection signal to the first inversion comparison circuit (2^), and a metering device (D)丨_) (32) is used to pulse width measurement of the second piece of rain pulse signal; since the main control element is the basic element of the existing industrial sewing machine servo motor controller, it is not the main target of the invention. Where you can't take it - step by step to describe its detailed road structure. I know that the specific structure of the present invention can be seen from the above § brothers, as for its electricity.
所示作：式與：作波形®，請參閱第三圖A以及第三圖B (T ^中&’第三圖A係為感應棒（1 2 )伸入感應線圈 p,,, 内部的伸入量為最小時所產生之波形圖，第二圖 B係為感應棒（i β 一… 口*一固 2)伸入感應線圈（1 1 )内部的伸入 里為最大時所產生之波形圖； 部之方t逢紉機開始運作時，係由主控元件（3 0)内 丨 < 方波產生哭f 0 σσ L3 1)輸出一組頻率、工作週期固定之 1279974 方波偵測訊號予第一反相比較電路（2 1 )，於本實施例 中，該方波偵測訊號之頻率500Hz且工作週期為50%，如 波形（1); 第一反相比較電路（2 1 )對該方波訊號進行反相處 理後’送入後端之RLC控制量檢出電路（3 〇 )，並隔離 後端之R L C控制量檢出電路（3 〇 )於方波訊號轉態的暫 悲（transient state)過程產生的瞬間負電壓（如波形（2)所 示）’避免負電壓直接逆向侵襲主控元件（3〇)，而造 成主控元件（3 0 )内部I/O埠的損壞； 該方波訊號送入RLC控制量檢出電路（1 〇 )後將產 生充放電的暫悲現象（如波形（3));此時，可由使用者對 腳踏板施以不同的踩踏量，令與腳踏板連結之感應棒（1 2 )改變其伸入感應線圈（1 3 )内的深淺程度，使得 RLC控制量檢出電路（1 〇 )的電感值亦隨之變化，方波 訊號於暫態過程的充放電時間常數也跟著改變。 隨後方波訊號再由RLC控制量檢出電路（1 〇 )送入 第二反相比較電路（2 2)中，第二反相比較電路（2 2 )將在暫悲充放電現象的方波加上一個直流準位（如波形 (4))，亦即把方波的低電壓準位由〇v箝位至該直流準位， 以便能正確過濾出所需要的負電壓脈波寬度；經電壓箝位 後的方波（如波形（5))經第二反相比較電路（2 2 )作反 相處理並與0V進行比較運算後，得到原本為負電壓部份 的波形（如波形（6)); 第二反相比較電路（2 2 )將處理後的波形送回主控 9 位79974 =(1〇)，經主控元件（1〇)内部之計時器（3 計算其脈波寬度後，便可㈣當時使用者希望透過施 予腳踏板不同壓力所產生不同的速度控制量。 由上述說明可知，本發明藉由 rr ^ ^ 稽田非接觸式的線圈感應與 脈見叶數方式，即可令使用者對車 縫連度及壓腳提升、切 線4動作進行有效的控制，有效 .. ⑪鮮决了傳統的元件使用 奇中短、低檢出解析度的問題，並右 Μ 柯亚有助於電路成本的降 低，由此可見，本發明確已具備顯著的實用性與進步性， 並符合發明專利要件，爰依法提起申請。 【圖式簡單說明】 第一圖：係本發明之動作示意圖。 第二圖：係本發明之詳細電路圖。 部的伸入量為最 第二圖A ··係感應棒伸入感應線圈内 」、時所產生之波形圖。Shown as: Waveform®, see Figure 3 and Figure 3B (T ^ & 'Third Figure A is the induction rod (1 2 ) extends into the induction coil p,,, inside The waveform diagram generated when the amount of penetration is minimum, and the second diagram B is generated when the induction rod (i β - ... mouth * one solid 2) protrudes into the inner portion of the induction coil (1 1 ). Waveform diagram of the part; when the part of the machine starts to operate, it is caused by the main control component (30) 丨< square wave generates crying f 0 σσ L3 1) Outputs a set of frequency and fixed duty period 1279974 square wave The detection signal is sent to the first inversion comparison circuit (2 1 ). In this embodiment, the square wave detection signal has a frequency of 500 Hz and a duty cycle of 50%, such as waveform (1); and a first inversion comparison circuit ( 2 1) After the square wave signal is inverted, 'send the RLC control quantity detection circuit (3 〇) to the back end, and isolate the RLC control quantity detection circuit (3 〇) at the back end to the square wave signal The transient negative voltage generated by the transient state process (as shown in waveform (2)) prevents the negative voltage from directly invading the main control component (3〇), resulting in Damage to the internal I/O埠 of the main control component (30); the square wave signal is sent to the RLC control quantity detection circuit (1 〇), which will cause a temporary sad phenomenon of charge and discharge (such as waveform (3)); The user can apply different pedaling amounts to the pedals, so that the sensing rods (1 2 ) connected to the pedals change the depth of the induction coils (13), so that the RLC control quantity detecting circuit The inductance value of (1 〇) also changes, and the charge and discharge time constant of the square wave signal changes in the transient process. Then, the square wave signal is sent to the second inverting comparison circuit (2 2) by the RLC control quantity detecting circuit (1 〇), and the second inverting comparison circuit (2 2 ) will be in the square wave of the temporary sad charging and discharging phenomenon. Add a DC level (such as waveform (4)), that is, clamp the low voltage level of the square wave from 〇v to the DC level, so as to correctly filter out the required negative voltage pulse width; The clamped square wave (such as waveform (5)) is inverted by the second inverting comparison circuit (2 2 ) and compared with 0V to obtain a waveform that is originally a negative voltage portion (such as a waveform (6). )); The second inverting comparison circuit (2 2 ) sends the processed waveform back to the master 9-bit 79974 = (1〇), the timer inside the main control unit (1〇) (3 calculates the pulse width After that, (4) the user may wish to generate different speed control amounts by applying different pressures to the pedals. From the above description, the present invention can be seen by the rr ^ ^ 田田 non-contact coil sensing and pulse number method. It can effectively control the seam continuity, presser foot lifting and tangent 4 movement. It is effective. 11 It is clear that the traditional components use the short and medium, low detection resolution, and the right 柯 亚 有助于 helps the circuit cost reduction, it can be seen that the present invention has significant practicality and progress, and In accordance with the requirements of the invention patent, 提起 apply in accordance with the law. [Simplified description of the drawings] The first figure is a schematic diagram of the operation of the present invention. The second figure is a detailed circuit diagram of the present invention. The amount of penetration of the part is the second picture A. · The waveform diagram generated when the induction rod protrudes into the induction coil.
第三圖B ··係感應棒伸人感應線圈内部的伸人量為最 大時所產生之波形圖。 里’、、、 【主要元件符號說明】 (1 0 ) RLC控制量檢出電路 (1 2 )感應棒 (3 2 )計時器 (1 1 )感應線圈 (21) 第一反相比較電路 (22) 弟二反相比較電路 (3 0 )主控元件 (31)方波產生器 10The third figure B·· is the waveform diagram generated when the sensor bar extends the maximum amount of extension inside the induction coil. ',,, [Main component symbol description] (1 0 ) RLC control quantity detection circuit (1 2 ) Induction rod (3 2 ) Timer (1 1 ) Induction coil (21) First inversion comparison circuit (22 ) 2nd phase inversion comparison circuit (3 0 ) main control element (31) square wave generator 10