基于車速傳感器的雷達測速儀檢定裝置
發(fā)布時間：2019-03-16 12:34
【摘要】：近年來，我國公路運輸發(fā)展勢頭十分迅猛，成為我國經(jīng)濟崛起一大助力。與此同時，道路交通管理問題日益復(fù)雜也成為有關(guān)部門不得不面臨的一大挑戰(zhàn)。各種違章、違法現(xiàn)象屢見不鮮，尤以超速行駛危害最大。目前，我國各地有關(guān)部門對道路車輛行駛速度的監(jiān)控主要依賴雷達測速儀。然而，雷達測速儀測速不準的現(xiàn)象時有發(fā)生，極大的降低了有關(guān)部門執(zhí)法的公正性和權(quán)威性。質(zhì)疑雷達測速儀準確性和合法性的聲音此起彼伏，使其陷入了“測人”需先“測己”的尷尬境地。解決問題的唯一辦法就是有關(guān)部門運用雷達測速儀檢定裝置，對雷達測速儀在投入使用前和到計量周期后進行可靠性檢定。目前國內(nèi)市場上雷達測速儀檢定裝置種類繁多，然而檢定條件均比較苛刻，需要在實驗室條件下完成，這對于大量固定安裝在道路上的測速系統(tǒng)來說，操作起來十分困難，而且檢定的環(huán)境過于理想化，忽視了道路環(huán)境、氣候、安裝角度、電磁干擾等對雷達測速儀造成的干擾。 本文在大量分析和論證的基礎(chǔ)之上，開發(fā)了一種新的雷達測速儀檢定裝置。該裝置可在雷達測速儀安裝位置就地開展檢定工作，省去了送檢的麻煩，并最大程度的還原了被測系統(tǒng)的使用環(huán)境，提高了檢定結(jié)果的有效性。本文的設(shè)計思路是使用該裝置與被測雷達系統(tǒng)對同一輛測試用車進行速度采集，并將二者獲取的車速數(shù)據(jù)進行實時對比，以此達到檢定雷達測速儀的目的。 本裝置由車速采集設(shè)備和上位機（PC）數(shù)據(jù)分析軟件構(gòu)成。所需車速信號由車速傳感器提供，因其直接來源于車輪轉(zhuǎn)動，，保證了數(shù)據(jù)的“原生態(tài)”，可靠性高。針對磁電式輪速傳感器和霍爾式車速傳感器分別設(shè)計了兩種不同的接口，保證設(shè)備能夠滿足大部分測試用車使用。車速采集設(shè)備由信號預(yù)調(diào)理電路、單片機、顯示部分和無線收發(fā)模塊構(gòu)成。磁電式輪速傳感器抗干擾能力差，產(chǎn)生的正弦波信號有大量干擾，且電壓幅值受車速影響明顯，因此需要對其進行預(yù)調(diào)理。通過二極管雙向限幅電路、二階有源低通濾波電路和施密特觸發(fā)器組成的預(yù)調(diào)理電路，將其轉(zhuǎn)換為頻率不變，占空比適中的方波，供單片機計算車速使用；霍爾式車速傳感器因其自身優(yōu)勢而不需要經(jīng)過預(yù)調(diào)理電路即可用于計算。顯示部分為LED數(shù)碼管，顯示車速精確到小數(shù)點后一位，便于駕駛?cè)藛T對速度的掌控。無線收發(fā)模塊用于單片機與上位機之間的數(shù)據(jù)傳輸。為保證數(shù)據(jù)傳遞的同步性，我們選取上位機軟件為主節(jié)點，雷達測速儀與車速采集設(shè)備為從節(jié)點。主節(jié)點在測試過程中，每1ms向兩個從節(jié)點同時發(fā)出數(shù)據(jù)請求，從節(jié)點接收到數(shù)據(jù)請求命令后，同時向主節(jié)點發(fā)送車速數(shù)據(jù)，主節(jié)點在接收到二者的車速數(shù)據(jù)后，進行數(shù)據(jù)分析、存檔并給出檢定報告。
[Abstract]:In recent years, our country highway transportation development momentum is very rapid, become our country economic rise a great help. At the same time, the increasing complexity of road traffic management has become a major challenge for the relevant departments. All kinds of violations, illegal phenomena are common, especially speeding the greatest harm. At present, the relative departments of our country mainly rely on radar velocimeter to monitor the speed of road vehicles. However, the phenomenon that the radar velocimeter is not allowed to measure the velocity often occurs, which greatly reduces the fairness and authority of the law enforcement of the relevant departments. The sound of questioning the accuracy and legality of radar velocimeter has caused it to fall into the awkward position of "measuring oneself" first. The only way to solve the problem is to use the calibration device of radar velocimeter to verify the reliability of radar velocimeter before it is put into use and after the period of measurement. At present, there are many kinds of calibration devices for radar velocimeter in the domestic market, however, the verification conditions are relatively harsh and need to be completed in laboratory conditions, which is very difficult to operate for a large number of fixed speed measuring systems installed on roads. Moreover, the verification environment is too idealized, neglecting the interference caused by road environment, climate, installation angle, electromagnetic interference and so on to radar velocimeter. On the basis of a great deal of analysis and demonstration, a new calibration device of radar velocimeter is developed in this paper. This device can carry out on-the-spot verification work in the installation position of radar velocimeter, save the trouble of sending to check, restore the operating environment of the tested system to the maximum extent, and improve the validity of the verification results. The design idea of this paper is to use the device and the measured radar system to collect the speed of the same test vehicle and compare the speed data obtained by the two in real-time so as to achieve the purpose of calibrating the radar velocimeter. The device is composed of speed acquisition equipment and upper computer (PC) data analysis software. The required speed signal is provided by the speed sensor, because it is directly from the wheel rotation, which ensures the "original ecology" of the data and high reliability. Two different interfaces for magneto-electric wheel speed sensor and Hall speed sensor are designed to ensure that the equipment can meet the requirements of most test vehicles. Speed acquisition equipment is composed of signal pre-conditioning circuit, single chip microcomputer, display part and wireless transceiver module. The anti-jamming ability of the magnetoelectric wheel speed sensor is poor, the sine wave signal produced by the sensor has a lot of interference, and the voltage amplitude is obviously affected by the speed, so it is necessary to pre-adjust it. Through diode bi-directional limiting circuit, second-order active low-pass filter circuit and Schmitt flip-flop, the circuit is converted into square wave with constant frequency and moderate duty cycle, which can be used to calculate the speed of single-chip computer. Hall speed sensor can be calculated without pre-conditioning circuit because of its advantages. Display part for LED digital tube, display speed accurate to a decimal point, easy for drivers to control the speed. Wireless transceiver module is used for data transmission between MCU and host computer. In order to ensure the synchronization of data transmission, we select the host computer software as the main node, radar velocimeter and speed acquisition equipment as the slave node. During the testing process, each 1ms sends a data request to two slave nodes at the same time. After receiving the data request command from the slave node, the master node sends the speed data to the master node at the same time. After receiving the speed data of the two slave nodes, the master node carries on the data analysis. File and provide verification report.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U495;TN953.1
本文編號：2441368
[Abstract]:In recent years, our country highway transportation development momentum is very rapid, become our country economic rise a great help. At the same time, the increasing complexity of road traffic management has become a major challenge for the relevant departments. All kinds of violations, illegal phenomena are common, especially speeding the greatest harm. At present, the relative departments of our country mainly rely on radar velocimeter to monitor the speed of road vehicles. However, the phenomenon that the radar velocimeter is not allowed to measure the velocity often occurs, which greatly reduces the fairness and authority of the law enforcement of the relevant departments. The sound of questioning the accuracy and legality of radar velocimeter has caused it to fall into the awkward position of "measuring oneself" first. The only way to solve the problem is to use the calibration device of radar velocimeter to verify the reliability of radar velocimeter before it is put into use and after the period of measurement. At present, there are many kinds of calibration devices for radar velocimeter in the domestic market, however, the verification conditions are relatively harsh and need to be completed in laboratory conditions, which is very difficult to operate for a large number of fixed speed measuring systems installed on roads. Moreover, the verification environment is too idealized, neglecting the interference caused by road environment, climate, installation angle, electromagnetic interference and so on to radar velocimeter. On the basis of a great deal of analysis and demonstration, a new calibration device of radar velocimeter is developed in this paper. This device can carry out on-the-spot verification work in the installation position of radar velocimeter, save the trouble of sending to check, restore the operating environment of the tested system to the maximum extent, and improve the validity of the verification results. The design idea of this paper is to use the device and the measured radar system to collect the speed of the same test vehicle and compare the speed data obtained by the two in real-time so as to achieve the purpose of calibrating the radar velocimeter. The device is composed of speed acquisition equipment and upper computer (PC) data analysis software. The required speed signal is provided by the speed sensor, because it is directly from the wheel rotation, which ensures the "original ecology" of the data and high reliability. Two different interfaces for magneto-electric wheel speed sensor and Hall speed sensor are designed to ensure that the equipment can meet the requirements of most test vehicles. Speed acquisition equipment is composed of signal pre-conditioning circuit, single chip microcomputer, display part and wireless transceiver module. The anti-jamming ability of the magnetoelectric wheel speed sensor is poor, the sine wave signal produced by the sensor has a lot of interference, and the voltage amplitude is obviously affected by the speed, so it is necessary to pre-adjust it. Through diode bi-directional limiting circuit, second-order active low-pass filter circuit and Schmitt flip-flop, the circuit is converted into square wave with constant frequency and moderate duty cycle, which can be used to calculate the speed of single-chip computer. Hall speed sensor can be calculated without pre-conditioning circuit because of its advantages. Display part for LED digital tube, display speed accurate to a decimal point, easy for drivers to control the speed. Wireless transceiver module is used for data transmission between MCU and host computer. In order to ensure the synchronization of data transmission, we select the host computer software as the main node, radar velocimeter and speed acquisition equipment as the slave node. During the testing process, each 1ms sends a data request to two slave nodes at the same time. After receiving the data request command from the slave node, the master node sends the speed data to the master node at the same time. After receiving the speed data of the two slave nodes, the master node carries on the data analysis. File and provide verification report.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U495;TN953.1
【參考文獻】
相關(guān)期刊論文 前10條
1 趙海濤;檀柏梅;趙毅強;耿俊峰;;低功耗高精度的電壓比較器設(shè)計[J];半導體技術(shù);2011年01期
2 劉學軍;;一種基于VC的串口通訊新方法[J];電腦知識與技術(shù);2010年03期
3 行小帥,古輝;關(guān)于二極管限幅電路的討論[J];山西大學師范學院學報(綜合版);1994年04期
4 洪震;;LED顯示屏產(chǎn)業(yè)發(fā)展綜述[J];信息技術(shù)與標準化;2010年10期
5 闞宏進,劉希遠,李翠玲;基于VC~(++)工控組態(tài)軟件實時數(shù)據(jù)庫系統(tǒng)的設(shè)計[J];甘肅工業(yè)大學學報;2001年04期
6 王鑫;唐廣;;一種中速高精度模擬電壓比較器的設(shè)計[J];電子設(shè)計工程;2009年07期
7 ;用PC控制PXI和CompactPCI模塊的串行連接技術(shù)[J];國外電子測量技術(shù);1999年04期
8 錢振華;張浩;彭道剛;;嵌入式PowerPC實時系統(tǒng)的通用I/O控制方法[J];測控技術(shù);2007年12期
9 林仲揚;;地感線圈式機動車超速自動監(jiān)測系統(tǒng)的檢定方案[J];中國計量;2008年06期
10 汪洋,李斌,陳麗,林琛;蛇形機器人控制系統(tǒng)的設(shè)計與實現(xiàn)[J];機器人;2003年06期
本文編號：2441368
本文鏈接：http://sikaile.net/kejilunwen/wltx/2441368.html
最近更新
教材專著
