出租車計(jì)價(jià)器畢業(yè)設(shè)計(jì)中英文翻譯-wenkub.com
2025-05-07 15:39 本頁(yè)面
【正文】 終端 1， 2， 3以及 S上的電壓狀態(tài)保持不變。 步驟 1：以順時(shí)針?lè)较蛐D(zhuǎn)任何旋轉(zhuǎn)選擇開關(guān)一格將提供 5伏特電壓到相應(yīng)的顯示，提供一個(gè)高等級(jí)的電壓終端 1， 2或 3，這表明一名乘客已經(jīng)進(jìn)入了出租車。 功能選擇旋轉(zhuǎn)開關(guān) 功能選擇開關(guān)旋轉(zhuǎn)的電壓應(yīng)提供的該終端的旋轉(zhuǎn)選擇開關(guān)，以確保正常運(yùn)行的電子電路列于表 3。一種可能的電 路可以執(zhí)行此開關(guān)行動(dòng)如圖 10c，它包含一個(gè)轉(zhuǎn)速限位開關(guān)和一個(gè)反轉(zhuǎn)器以及兩個(gè) 2輸入與門。保持終端 D和 H在 低級(jí)狀態(tài)下重置為零對(duì)應(yīng)的顯示分別通過(guò)終端 B,D,H而改變低壓狀態(tài)，并準(zhǔn)備好從對(duì)應(yīng)的乘客那里計(jì)算出相應(yīng)的計(jì)數(shù)款額，計(jì)數(shù)脈沖這三個(gè)顯示器通過(guò)終端提供總額。對(duì)于功能選擇開關(guān)旋轉(zhuǎn)渠道的描述，稍后會(huì)以一個(gè)成功的 5輸入門函數(shù)來(lái)解釋。這個(gè)門信號(hào)將被連接到計(jì)數(shù)器的輸入 A并且連接到輸出終端 R。 電路產(chǎn)生時(shí)鐘脈沖的顯示電路 CT4 這條電路的作用根據(jù)電壓電平在輸入終端 J、 K或者 L，分別供應(yīng) 1， 2或者脈沖在每脈沖的輸出終端 R引起在任何終端 N或 M。一種可能的線路圖可被驗(yàn)證， 它包括三個(gè)十年的計(jì)數(shù)器 7490，一個(gè)聲 BCD 以杜威解碼器輸入 7445， 3個(gè) 4輸入和 1個(gè) 3輸入以及 1個(gè) 2輸入和 2個(gè) 3輸入或門。 CT2 ，電路 CT2有 4個(gè)輸入 J， K， L及E和 1個(gè)輸出 M，輸出功能的電 路是供應(yīng)單脈沖的輸出 M的某一些脈沖產(chǎn)生的輸出的速度傳感器（出租車行駛了一定得距離），根據(jù)乘客的人數(shù)租用的汽車。 這將自動(dòng)斷開相應(yīng)的終端 1， 2或 3個(gè)從地面。 乘客人數(shù)檢測(cè)電路 CT1如圖所示的一般框圖，該電路電腦與電話系統(tǒng)整合有三個(gè)輸出： 1， 2和 3相對(duì)應(yīng)于三個(gè)輸出 J ， K和 L。第四號(hào)推進(jìn)總鈕第四次讀出，使任何人保留讀出相應(yīng)的總收入。最后讀出的數(shù)據(jù)會(huì)包括停車的費(fèi)用等等費(fèi)用。 主要的電子和顯示單 元 一個(gè)建議是主要形式的電子和顯示單元 。 為了找到某種方式來(lái)檢測(cè)出租車的運(yùn)動(dòng)，正弦波發(fā)生器的輸出是糾正通過(guò)一個(gè)通用的硅二極管延胡索乙然后平滑的 1000年 F電容。該單位應(yīng)位于前排的司機(jī)和乘客之間。然而，我們的實(shí)驗(yàn)是計(jì)價(jià)而不僅僅是只顯示三個(gè)讀數(shù)。原型下已建成 埃及贈(zèng)款科學(xué)學(xué)院 和技術(shù)研究。我同 時(shí)也應(yīng)指出，我們提出的多渠道的計(jì)價(jià)，不是簡(jiǎn)單地說(shuō)，一個(gè)多顯示讀數(shù)?，F(xiàn)在還存在的單聲道計(jì)價(jià)，已經(jīng)變得非常，國(guó)家稅務(wù)部門也知道這種困難 每年估計(jì)出租車業(yè)主的收入支出，以及應(yīng)支付的稅務(wù)也很困難。從這些支付工資的出租車司機(jī)以及作為燃料費(fèi)用外，還要維修以及汽車折舊等費(fèi)用。 在這種情況下，出租車司機(jī)強(qiáng)迫乘客支付多于他們所應(yīng)付 的 。 作為解決這個(gè)問(wèn)題的一個(gè)部分，在某些國(guó)家出租車用來(lái)解決這個(gè)問(wèn)題，送人們 從一個(gè)地方到另外一個(gè)地方。waiting time according to the number of passengers hiring the taxicab. In the following part and as an example, we will present a plete design for a threechannel taximeter. Block diagrams as well as detailed circuit diagrams of the experimental threechannel taximeter are also included. A prototype has been built under grant from the Egyptian Academy for Scientific and Technological Research. 2. AN EXPERIMENTAL THREECHANNEL TAXIMETER Theory of operation of our experimental device to work as an electronic digital taximeter is based on t h e fact thathe speedometer cable rotates one revolution for each meter of travelling distance. Accordingly, if the speedometer cable is coupled with a speed sensor that generates a single pulse for each meter of travelling distance, then our taximeter could be three up counter modules associated with a speed sensor unit. However, our experimental taximeter is not simply a three display readouts. As a matter offact it contains logic circuits that automatically changes the fare per kilometer of travelling distance or per minutes of waiting time according to the number of passengers hiring the taxicab. The device may be splitted into two main parts: The first is the speed sensor unit which may be located anywhere in the taxicab such that an easy coupling to the speedometer cable can be achieved. The second unit contains the main electronic circuit, the displayand control panel. The unit should be located somewhere in front of both the driver and the passengers. A possible ponents locations is shown in Figure 1. A. Speed Sensor Unit The main function of this unit is to supply train of pulses whose frequency is proportional to the angular rotation of the wheels. A possible form of a speed sensor is shown in Figure 2. If may consist of a permanent mag sine wave generator with its output connected to a pulse shapping circuit (two general purpose silicon diodes, 1K ohms resistor and a schmit trigger inverter). In order to find some way to detect the movement of the taxicab, the output of the sine wave generator is rectified through a general purpose silicon diode Dl then smoothed by a 1000 F capacitor. The output voltage at terminal Q is then limited to the value of volts by using a Ik ohms resistor as well as a zener diode ZD. The level of the voltage at terminal Q would be high whenever the taxicab is moving and will be zero otherwise. This voltage can be used for the automatic switching from distance fare to time fare. B. Main Electronic and Display Unit A suggested shape for the main electronic and display unit is shown in Figure 3. The control and display panel contains all 39。 controls necessary for operating the taximeter as well as four readout displays. The first channel will give the sum of money required from the first passenger, while the second and third readouts are for the second and third passengers, respectively. The fourth readout will give th
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