536489 A7 --—---— B7___ 五、發明說明（/ ) 本發明係關於一種具免電池胎壓偵測器之胎壓警告裝 置係提供裝設於輪胎内的胎壓檢測器無電源裝置的胎壓 警告裝置。 有於車禍發生機率隨著汽車增加而提升，分析後發 現部份車禍發生係與汽車平時保養不週全有關，由於並非 所有駕駛者皆能百分之百掌握汽車現況，因而造成自發性 的車禍，其中汽車輪胎維護不佳的因素亦不在少數，是 以，目前部份國家的相關交通法令已規範汽車輪胎内需設 置月°壓偵測器，令駕駛者於駕車前可先行瞭解輪胎狀態， 以確保行車安全。 睛參照公告第392604號「無線胎壓偵測器」新型專利 案，其揭示數個設置於各輪胎的胎壓發射器與一裝設於車 體中的胎壓接收器及控制單元，該胎壓發射器將目前胎壓 k號傳送至胎壓接收器，再由輸入至該控制單元以產生指 示信號。 又，公告第323600號「胎壓警示器之電路裝置」新型 專利案，係同樣以無線傳輸胎壓信號，而其主要藉由將胎 壓檢測器部份構件加以改良（壓力感測單元設置於氣嘴位 置），以達到簡化胎壓檢測器的結構。 再請參考公告第404354號「隱藏式胎壓偵測器之電源 體安裝構造」新型專利案，係揭示安裝於輪圈上的隱藏式 胎壓偵測器的電源體安裝結構的設計。 由前述各前案的說明可知，其皆以無線傳輸方式將該 無線胎壓偵測器偵測到的胎壓傳送至接收端，由於各個專 本紙張尺度剌巾S國家標準（CNS)A4規格（210 X 29$公爱） (請先閱讀背面之注意事項再填寫本頁) . -線- 536489 A7 --~------B7 ___ 五、發明說明（上） 利案係分別對胎壓偵測器的部份結構進行改良，而達到其 他專利案所無法呈現之功效，故皆先後獲准專利。 (請先閱讀背面之注意事項再填寫本頁) 然而，綜觀前揭各案發明的胎壓賴測器仍存在使用缺 點，亦即，月台壓檢測器需提供電源與壓力檢測元件及其相 關電路工作電源，因此，當電源耗盡時，則需進車廠將胎 壓檢測器取出再重新更換新的電源，否則將完全喪失胎麼 檢測器的功能，而針對前揭各前案月台壓檢測器的電路必定 需要電源的設計，必定面臨上述的問題，因此，將造成車 輛輪月。未知壞月；，駕駛者需進廠取出胎壓檢測器的問題， 而令駕敬者甚感不便。 ^為此，本發明主要目的係提供一種加裝在輪胎内的檢 壓檢測器無需電源設計的胎壓檢測裝f，以解決上述前案 或目前使用胎壓檢測器車輛所面臨的問題。 欲達上述目的所使用的主要技術手段係令該胎壓偵測 裝置包含有： ' 控制單70，係内建有數組頻率掃描信號及壓力對昭 表； η -無線發射單元，係包含有至少一組射頻處理器及複 數組不同頻段的天線，該射頻處理器係連接至該控制單元 的輸出端； 複數組胎壓檢測器，各胎壓檢測器係由LC振盪電路組 成’其中電感元件係為一天線，而電容元件係為微機電元 件，該微機電元件係為一可變電容器，其可變條件為壓力 狀態改變； 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 X 297公爱） 536489 A7 五、發明說明（2>) 上述胎壓檢測装置係由控制裝置對各胎壓作週期性的 頻率掃描’以找尋與各胎壓檢測器振逢信號的共振頻率，、 當各胎壓檢測器的可變電容因壓力改變，則改變其振盈頻 率’。故控制單元對該胎壓檢測器發出相同頻率時，無線發 ，単兀天線電壓則因產生共振而瞬間降低，是以，該控‘ 單70可依電壓差與該掃描頻率對照壓力對照表判斷目前輪 胎的壓力值；藉此，該胎壓檢測器將毋需内建電源，而: 更換電源的問題。 Μ 本發明次-目的係提供一種具有溫度感應的胎壓響告 裝置，令上述胎壓檢測器包含有兩組不同電容值可變電^ 器:以與天線組成兩組不同振盈頻率的振盈電路，其中: 可變電容器的可變條件為溫度變化，而控制單元中亦對應 加入溫度的掃描頻率及溫度對照表，以此，控制單^ 透過週期性的頻率掃描，即可瞭解特定胎壓檢測器目前所 檢知的溫度值。 7 為使貝審查委員能進一步瞭解本發明之結構 其他目的，1^附以圖式詳細說明如后： )圖式部份： 第一圖 第二圖 第三圖 第四圖 係本發明的一電路方塊圖。 係第本發明裝設於車輛的位置示意圖。 係本^明無線發射單元第一較佳實施例的電路 塊圖。 :係本發明無線發射單元第二較佳實施例 塊圖。 乃 $紙張尺㈣財關 (請先閱讀背面之注意事項再填寫本頁} ----訂---------線 » 297公釐） 536489536489 A7 -------- B7___ V. Description of the invention (/) The present invention relates to a tire pressure warning device with a battery-free tire pressure detector. The tire pressure detector provided in the tire has no power supply device. Tire pressure warning device. The probability of accidents has increased with the increase in the number of cars. After analysis, it was found that some accidents were related to the inadequate maintenance of the cars. Because not all drivers can fully grasp the current situation of the cars, resulting in spontaneous accidents. The factors for poor tire maintenance are not uncommon. Therefore, the current traffic laws in some countries have regulated the need for monthly pressure detectors in car tires, so that drivers can understand the tire status before driving to ensure driving safety. . Reference is made to the new patent of "Wireless Tire Pressure Detector" No. 392604, which discloses several tire pressure transmitters provided on each tire and a tire pressure receiver and control unit installed in the vehicle body. The pressure transmitter transmits the current tire pressure k to the tire pressure receiver, which is then input to the control unit to generate an indication signal. In addition, the new patent case of Announcement No. 323600 “Circuit Device of Tire Pressure Warning Device” also transmits tire pressure signals wirelessly, and it mainly improves some components of the tire pressure detector (the pressure sensing unit is set at Valve position) to simplify the structure of the tire pressure detector. Please refer to the new patent case No. 404354 "Power body installation structure of hidden tire pressure detector", which reveals the design of the power body installation structure of the hidden tire pressure detector installed on the rim. From the descriptions of the previous cases, it is known that all the tire pressure detected by the wireless tire pressure detector is transmitted to the receiving end by wireless transmission. Due to the special national paper standard (CNS) A4 specifications of each paper standard (210 X 29 $ Public Love) (Please read the notes on the back before filling this page). -Line- 536489 A7-~ ------ B7 ___ V. Description of the Invention (Top) Some structures of the tire pressure detector have been improved to achieve effects that cannot be exhibited in other patent cases, so they have been granted patents. (Please read the precautions on the back before filling in this page) However, before reviewing the tire pressure inventors of each case, there are still disadvantages in using it, that is, the platform pressure detector needs to provide power and pressure detection components and related The circuit works as a power source. Therefore, when the power is exhausted, you need to enter the car factory to take out the tire pressure detector and replace it with a new power source. Otherwise, the function of the tire detector will be completely lost. The circuit of the detector must require the design of the power supply, and it must face the above-mentioned problems. Therefore, it will cause the wheel of the vehicle. Unknown bad month; the problem that the driver needs to enter the factory to take out the tire pressure detector, which is very inconvenient for drivers. For this reason, the main purpose of the present invention is to provide a tire pressure detection device f which is installed in the tire pressure detection detector without a power supply design, so as to solve the problems faced by the foregoing case or the current vehicle using the tire pressure detector. The main technical means used to achieve the above purpose is to make the tire pressure detection device include: 'Control sheet 70, which has an array of frequency scanning signals and pressure counters; η-a wireless transmitting unit, which contains at least A set of RF processors and antennas of different frequency bands in a complex array, the RF processor is connected to the output of the control unit; a complex array of tire pressure detectors, each of which is composed of an LC oscillating circuit. It is an antenna, and the capacitive element is a micro-electro-mechanical element. The micro-electro-mechanical element is a variable capacitor, and the variable condition is a change in pressure state. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (21〇X 297). (Public love) 536489 A7 V. Description of the invention (2 &); The above-mentioned tire pressure detection device is a periodic frequency scan of each tire pressure by the control device to find the resonance frequency of the vibration signal with each tire pressure detector. The variable capacitance of each tire pressure detector changes its vibration frequency due to pressure changes. Therefore, when the control unit sends the same frequency to the tire pressure detector, it is wirelessly transmitted, and the antenna voltage is reduced instantaneously due to resonance. Therefore, the control unit 70 can judge the pressure comparison table based on the voltage difference and the scanning frequency. The current tire pressure value; this way, the tire pressure detector will not need a built-in power supply, and: the problem of replacing the power supply. Μ The objective of the present invention is to provide a tire pressure response device with temperature sensing, so that the tire pressure detector includes two sets of variable capacitors with different capacitance values: two sets of vibrations with different vibration frequencies are formed with the antenna. Circuit, where: the variable condition of the variable capacitor is temperature change, and the control unit also adds the scanning frequency and temperature comparison table for temperature, so that the control unit can understand the specific tire through periodic frequency scanning. The temperature value currently detected by the pressure detector. 7 In order to enable the panel reviewer to further understand the other purposes of the structure of the present invention, 1 ^ is attached with a detailed description as follows:) Schematic part: The first picture, the second picture, the third picture, and the fourth picture are a part of the present invention. Circuit block diagram. This is a schematic diagram of a position where the present invention is installed in a vehicle. This is a circuit block diagram of the first preferred embodiment of the wireless transmitting unit. : This is a block diagram of the second preferred embodiment of the wireless transmitting unit of the present invention. It is $ paper rule ㈣ fortune (please read the precautions on the back before filling in this page) ---- Order --------- line »297mm) 536489
五、發明說明（ 苐五圖·係本發明益 月無線發射單元第三較佳實施例的電路方 塊圖。 第六圖：係本發明笛 乂 1月弟四圖的部份詳細電路方塊圖。 係本發明之射頻微處理器之微處理器的學習模式 程圖。 係本發明之射頻微處理器之微處理器的檢測 流程圖。 、飞 (二）圖號部份： (1 0)控制單元 (2 1 )射頻處理器 (212)比較器 (2 2)天線 (2 4)微處理器 (3 1 )天線 第七圖 第八圖 (2 0)無線發射單元 (211)電壓振盪器 (2 1 3)濾波器 (2 3 )多工器 (3 0)胎壓檢測器 (3 2)可變電容 (3 3 )電阻 本發明係為一免電源胎壓檢測器的胎壓檢測裝置， 參閱第-圖及第二圖所示，該胎壓檢測裝 一控制單元U0)，仙建有數組描掃頻m 掃頻段中各頻率/壓力對照表，並内建有胎壓警告模式； 一無線發射單元（2 Q )，係連接JL該控制單工（ 0)，晴配合第三圖及第六圖所示，該無線發射單元（ 〇 )包含有一射頻處理器（2 1 )及數組不同頻段天、_ (2 2 )，各天線（2 2)係對應控制單元（1 〇 )的# 描頻段，·其中該射頻處理器（2 i )包含有一連接至該决 本紙張尺度翻巾關賴準（CNS)A4祕（21G X ^公釐)'— --— --- (請先閱讀背面之注意事項再填寫本頁) 裝 線· 536489 A7 B7V. Description of the Invention (25): This is a circuit block diagram of the third preferred embodiment of the Yiyue wireless transmitting unit according to the present invention. Figure 6: Part of the detailed circuit block diagram of the fourth figure of the January flute of the present invention. It is a flowchart of the learning mode of the microprocessor of the RF microprocessor of the present invention. It is a detection flowchart of the microprocessor of the RF microprocessor of the present invention. (2) Figure number part: (1 0) control Unit (2 1) RF processor (212) comparator (2 2) antenna (2 4) microprocessor (3 1) antenna seventh figure eighth figure (2 0) wireless transmitting unit (211) voltage oscillator ( 2 1 3) Filter (2 3) Multiplexer (3 0) Tire pressure detector (3 2) Variable capacitor (3 3) Resistance The present invention is a tire pressure detection device for a power-free tire pressure detector. Refer to Figure-Figure 2 and Figure 2. The tire pressure detection is equipped with a control unit U0). Xianxian has a frequency / pressure comparison table in the array scan frequency m sweep frequency band, and has a built-in tire pressure warning mode. The wireless transmitting unit (2Q) is connected to the control simplex (0) of JL, and cooperates with the third and sixth figures as shown in the figure. The wireless transmitting unit (0) contains A radio frequency processor (2 1) and an array of different frequency bands, _ (2 2), each antenna (2 2) is a # trace frequency band corresponding to the control unit (10), where the radio frequency processor (2 i) includes There is a paper size paper towel turning standard (CNS) A4 secret (21G X ^ mm) connected to this paper (-) --- --- (Please read the precautions on the back before filling this page) Assembly line · 536489 A7 B7
五、發明說明（ 制單元（1 0 )的電壓振盪器（2 i i )，以將控制單元 (1 0)輸出的脈波調變信號轉換為振盪頻率信號再由天 線（2 2 )輸出，以及一比較器（2 i 2 )，係連接至該 天線（2 2 )，以檢測天線（2 2 )的電壓差，並反應至 该控制單TL (圖中未示）以判斷對照頻率電壓與壓力的對 照數值表，而求得壓力值； 複數個胎壓檢測器（3 〇 )，各胎壓檢測器（3 〇 ) 係由至少一組振盪器組成，各胎壓檢測器（3 〇 )係為不 同振盪頻率，並且各胎壓檢測器（3 〇)的振盪頻率恰對 應無線發射單it ( 2 G )的天線（2 2 ) ‘；請配合第六圖 所示，該振盪器係由一天線（3丄）、電阻（3 3 )及可 k電谷（3 2 )組成，其中該可變電容（3 2 )係具有隨 輪胎内壓力變化而改變電容值的特性，是以，該振盈器的 振盪頻率將隨著胎壓而改變。 請參閱第二圖所示，係為本發明裝設於車輛上的一位 置示意圖’該控鮮元（i 〇 )及無線發射單元（2 〇 ) 係固定裝設於車輛内，而各胎壓檢測器（3 〇 )分置於輪 胎上’其中該無線發射單元（2Q)位置係對應於各輪月: 的胎壓檢測器（3 〇 )。 上述控制單兀（1〇)係週期性地將各組描掃頻段由 該無線發射單元（2 0)的對應天線（22)向外傳送， 當，描頻段的各頻率時，即可令其中—頻率與特定胎壓檢 測器（3 0 )的振蘯頻率產生共振，㈣，由於各胎壓檢 測器（3 0 )於首次使用時，輪胎狀態為正常狀態，且其 --------------------tr---------線 (請先閱讀背面之注意事項再填寫本頁) 536489 五、發明說明（石） 振錢率可皆對應到各組掃描頻段其中—頻率，是以，該 控制早元（1〇)可依库盤交 、 人 ^ j£ ΑΛ «Α r 、 π描頻段進行頻率掃描，將 產生共振的胎壓檢測器（] 用頻段。 …3〇)加以記錄其輪胎位置與使 上述胎壓檢測裝置的控制單 過益線發射單亓…、 〇)係週期性地透 夕屬射早几（2 0)依照各 率，若胎壓檢測哭（s η、咖如 只仅七出掐扣頻 可變電容（J 乂？ 麼改變時，則可反應於 （3 2)的電容值，因此，其振盪頻率亦合改 :?控制單元（10)依序對各船壓檢 屬=頻段進行各解掃描時，即可對特定胎__ (3 0 )的振錢率產生共振，此時，無線發射單元（2 ◦*)的電源電壓瞬間降低，而控制單元（1〇)立即將該 掃描頻與頻率/壓力對昭丧 對'、、、表认找出該共振頻率所對應 的£力值:再透過胎壓警告模式的執行’判斷是否超過或 低於胎壓警告值，再決定是否發出警告。 請參閱第四圖所示，係為本發明無線發射單元（2 〇)的第二較佳實施例，其中該無線發射單元（2 〇)進 一步包含有一多工器（23)，該多工器（23)係連接 於射頻處理器（21)與各天線（22)間，又其控制端 係連接至該控制單元（10)，以藉由控制單元（1〇) &制對特定天線（2 2 )發射對應的掃描頻段，以更清楚 的定位天線（2 2)所對應的胎壓檢測器（3 〇)位置。 請參第五圖所示，係為本發明的第三實施例，係其中 該無線發射單元（2 〇)係包含有複數組射頻處理器（2 本紙張尺度適ϋ國國家標準（Cns)A4規格（210 X 29$公釐） 536489 A7 B7 五、發明說明（^ ) ::數組射頻處理器（2 1 )係透過-微處理器 檢測器二元上10 :連接’並對應特定的胎壓 不，睛配合第六圖所示，各射頻處理器 I Z丄）包含有： 一微處理哭r 9 /1、 . 时1 J 4 )，係内儲一組特定頻段與頻率/ 於：頻率/溫度的對照數值表，其包含有-脈寬調 d就輸出端PWM及—電壓差輸入端Mp; 一電壓振in ( 2丄i)，係連接至該微處理器（2 9輸出端’該輸出端透過-緩衝器連接至天線（2 比較器（2 (請先閱讀背面之注意事項再填寫本頁} f 端 係連接至該天線（2 2 ) •濾波H ( 2 1 3 )，係連接至該比較器（2丄2 ) 的輸出端及該微處理器（24)的輸出端； η上述射頻處理器（2 1 )係主要由該微處理器（2 依^描頻段的各頻率輸出特定的脈寬調變信 器'(211)，令該天線（22)輸出特定 ::頻率’再由比較器（212)檢知天、線（22)兩端 农壓差’亦即，若天線與胎壓檢測器（3〇)的振盈頻 率產生共振’產生電壓瞬間下降，則比較器（2丄2)合 檢知-壓差數值透過渡波器（2丄3)輸人至該微處理二 (2 4)，使微處理器（24)抓取此次共振頻率值； 而與頻率/壓力對照表進行比對，以取得對應壓力數值， 由於該微處理器（2 4 )係與控制單元（工〇 )連接，可 關家鮮（CNS)A4 規格 -------訂---------線- 536489 A7 五、發明說明（ 將目前壓力值反應予控制單元（10)，由控制單元u 2)判斷是否超過或低於壓力警告值’而達 告之目的〇 J吕 此外，該胎壓檢測器（3 0)更可加入不同於第—可 變電容電容值範圍的第二可變電容，該第二可變電容同樣 與天線構成- RLC _路’惟該第二可變電容係隨輪胎 内溫度值產生不_頻率，是以，該微處理器 率電厂堅與溫度的對照數值表，亦可依照上述共振頻率㈣ 方法判斷目的輪胎内溫度值為何。 ★由上述可知，本發明係於輪胎内裝設隨壓力或溫度改 變的振靈電路，以上揭示利用可變電容器依壓力或溫度物 理邊化，使電容改變而改變振盪頻率，此外，亦可使用可 變電感器，並令該可變電感器具有天線功能，藉此，該振 蘯電路則需配合固定電容器。 該微處理器（2 4)係主要包含有一學習胎壓位置及 振盪頻率模式及-檢測模式，請參閱第七圖所示，係為上 述微處理器（2 4)的學習胎壓位置及振盪頻率模式，其 操作流程啟動係在電源開啟與車輛點火裝置是否啟動決定 之，若車輛，點火開_已開啟代表車子曾經熄火而將再次啟 動行駛，故而啟動學習模式，其中各微處理器對其内建掃 拖頻段的各頻率依序發射，以對胎壓檢測器進行位置及振 蘯頻率的掃描並加以記錄之’待完成後即直接進入檢測模 式。 請參閱第八圖所示，係為該檢測模式的程式流程圖， (請先閱讀背面之注意事項再填寫本頁) I --------tr---------線一 536489 A7 五 、發明說明（ B7 首先進行等待延遲時 特定頻率的脈波調變”至：：取内建的掃描頻段，輸出 超過共撮時的預設電檢知是否有電屢差是否 是’則與頻她或頻率;二 = = 若 值/溫度值並輸入至該控制單:檢广否力 個掃描頻率，若 工冉松測疋否為敢後一 進行睡眠模式，#待巾冑^1率⑽步驟；若是’則回到 飞4待中_號回到開始步驟。 =知，本發明藉由無線頻率共振之原理，對參 :亀内嶋檢測器進行頻率掃 2 或溫度改變的共振頻率值， 竹'趟力 I I I I 訂、 元’以判斷是否超過或低於警告值值而==料 以’本發明的胎壓檢測器僅使用振盪電路，二=，- =於該胎壓檢測器中’故不會有更換電池的程=何 為駕駛者簡省進車廠次數及成本。 出現’ 線 因此，本發明之設計符合新型專利 心 文提出申請。 ，友依法具V. Description of the invention The voltage oscillator (2 ii) of the control unit (1 0) is used to convert the pulse wave modulation signal output from the control unit (1 0) into an oscillation frequency signal and then output by the antenna (2 2), and A comparator (2 i 2) is connected to the antenna (2 2) to detect the voltage difference of the antenna (2 2) and react to the control unit TL (not shown) to judge the voltage and pressure of the control frequency. The pressure value is obtained by comparing the numerical value table; a plurality of tire pressure detectors (30), each tire pressure detector (30) is composed of at least one set of oscillators, and each tire pressure detector (30) is Are different oscillation frequencies, and the oscillation frequency of each tire pressure detector (30) corresponds to the antenna (2 2) of the wireless transmitting single it (2 G); please cooperate with the sixth figure, the oscillator is composed of one day It consists of a wire (3 丄), a resistor (3 3), and a k-valley (3 2). The variable capacitor (3 2) has the characteristic of changing the capacitance value according to the pressure change in the tire. Therefore, the vibration The oscillation frequency of the booster will change with the tire pressure. Please refer to the second figure, which is installed on the vehicle according to the present invention. A position diagram of the 'the fresh control unit (i 0) and the wireless transmitting unit (20) are fixedly installed in the vehicle, and each tire pressure detector (30) is placed on the tire', wherein the wireless transmitting unit The (2Q) position corresponds to the tire pressure detector (30) corresponding to each month: The above-mentioned control unit (10) is a system that periodically scans each set of scanning frequency bands by the wireless transmitting unit (20). The antenna (22) transmits outwards. When each frequency of the frequency band is traced, the frequency can be made to resonate with the vibration frequency of the specific tire pressure detector (30). Alas, since each tire pressure detector (3 0) When using for the first time, the tire status is normal, and its -------------------- tr --------- line (please read first Note on the back, please fill in this page again) 536489 V. Description of the invention (stone) The vibration rate can be corresponding to each group of scanning frequency bands-frequency, so the control early yuan (10) can be paid by the library, people ^ j £ ΑΛ «Α r, π scan frequency band to scan the frequency, the tire pressure detector (] frequency band that produces resonance will be used to record its tire position and the tire The control device of the detection device emits a single line ..., 〇) is periodically transmitted early (20) according to the rate, if the tire pressure detection cry (s η, Karu only seven out of the buckle Frequency variable capacitor (J 乂? When it is changed, it can be reflected in the capacitance value of (3 2), so its oscillation frequency is also modified:? The control unit (10) sequentially performs the pressure check of each ship = frequency band. When each solution is scanned, resonance of the vibration rate of the specific tire __ (30) can be generated. At this time, the power supply voltage of the wireless transmitting unit (2 ◦ *) is instantly reduced, and the control unit (10) immediately changes the Scanning frequency and frequency / pressure pairs show that the force value corresponding to the resonance frequency is found: then judge whether it exceeds or falls below the tire pressure warning value through the execution of the tire pressure warning mode, and then decide Whether to issue a warning. Please refer to the fourth figure, which is a second preferred embodiment of the wireless transmitting unit (20) according to the present invention. The wireless transmitting unit (20) further includes a multiplexer (23). The controller (23) is connected between the radio frequency processor (21) and each antenna (22), and its control end is connected to the control unit (10), so that the specific antenna is controlled by the control unit (10) & (2 2) Transmit the corresponding scanning frequency band to more clearly locate the tire pressure detector (30) position corresponding to the antenna (2 2). Please refer to the fifth figure, which is the third embodiment of the present invention, in which the wireless transmitting unit (20) includes a complex array radio frequency processor (2 papers conforming to the national standard (Cns) A4). Specifications (210 X 29 $ mm) 536489 A7 B7 V. Description of the invention (^) :: Array RF processor (2 1) is a 10-connection through the microprocessor detector binary and corresponds to a specific tire pressure No, as shown in the sixth figure, each RF processor IZ 丄) includes: a micro processor cry r 9/1,. Hour 1 J 4), the system stores a set of specific frequency bands and frequencies / in: frequency / A table of comparative values of temperature, which includes-pulse width modulation d output terminal PWM and-voltage difference input terminal Mp; a voltage vibration in (2 丄 i) is connected to the microprocessor (2 9 output terminal 'the The output is connected to the antenna through the -buffer (2 comparator (2 (please read the precautions on the back before filling out this page) f terminal is connected to the antenna (2 2) • filter H (2 1 3), is connected To the output terminal of the comparator (2 丄 2) and the output terminal of the microprocessor (24); η the above-mentioned radio frequency processor (2 1) is mainly composed of the microcomputer The processor (2 outputs a specific pulse width modulation signal according to each frequency of the frequency band '(211), so that the antenna (22) outputs a specific :: frequency', and then the comparator (212) detects the antenna and line ( 22) The agricultural pressure difference at both ends, that is, if the resonance frequency of the antenna and the tire pressure detector (30) produces resonance, and the voltage drops instantaneously, the comparator (2 丄 2) collectively detects that the pressure difference value is transmitted. The waver (2 丄 3) is input to the micro processor two (2 4), so that the microprocessor (24) captures the current resonance frequency value; and compares it with the frequency / pressure comparison table to obtain the corresponding pressure value. As the microprocessor (2 4) is connected to the control unit (work 0), it can be connected to the CNS A4 specification. -------- Order --------- Line-536489 A7 V. Description of the invention (The current pressure value is reflected to the control unit (10), and the control unit u 2) judges whether it exceeds or falls below the pressure warning value, and achieves the purpose. In addition, the tire pressure detector (3 0) It is also possible to add a second variable capacitor that is different from the first variable capacitor capacitance range, and the second variable capacitor is also formed with the antenna-RLC_ 路 ', but the second variable capacitor The non-frequency is generated with the temperature inside the tire. Therefore, the microprocessor rates the comparison table between the power plant and the temperature, and you can also determine the temperature inside the target tire according to the above-mentioned resonance frequency method. ★ From the above, The invention is installed in the tire with a vibration circuit that changes with pressure or temperature. The above disclosure uses variable capacitors to physically change pressure and temperature according to pressure or temperature to change the capacitance to change the oscillation frequency. In addition, a variable inductor can also be used. And make the variable inductor have an antenna function, so that the vibrating circuit needs to cooperate with a fixed capacitor. The microprocessor (2 4) mainly includes a learning tire pressure position and oscillation frequency mode and-detection mode. Please refer to the seventh figure, which is the learning tire pressure position and oscillation of the microprocessor (2 4). In frequency mode, the operation flow is started by determining whether the power is turned on and whether the vehicle's ignition is turned on. If the vehicle is turned on, it means that the car has turned off and will start driving again. Therefore, the learning mode is started. Each frequency of the built-in sweeping frequency band is transmitted in order to scan the position and vibration frequency of the tire pressure detector and record it. After the completion, it will directly enter the detection mode. Please refer to the figure 8 for the program flow chart of this detection mode. (Please read the precautions on the back before filling this page) I -------- tr --------- Line one 536489 A7 V. Description of the invention (B7 First, the pulse frequency modulation of the specific frequency when waiting for the delay "to: Take the built-in scanning frequency band, and the output exceeds the preset electrical detection when the common acquisition is detected. YES 'then frequency or frequency; two = = if value / temperature value and input to the control list: check if the scanning frequency is high, if the worker Ran Song tests whether it is dare to go to sleep mode later, # 待 巾胄 ^ 1 率 ⑽step; if it is', then go back to flying 4 to be _ No. to return to the starting step. = Know, the present invention uses the principle of wireless frequency resonance to perform a frequency sweep 2 or temperature change on the reference: The resonance frequency value of the bamboo is used to determine whether it exceeds or falls below the warning value. == It is expected that the tire pressure detector of the present invention uses only an oscillating circuit. Two =,-= for the tire Pressure detector 'so there will be no battery replacement process = what is the driver to save the number and cost of entering the car factory. Appears' Line Cause , In line with the new design of the present invention patent application proposed heart. Friends with law