WO2017036000A1 - 一种基于电源控制及输出脉冲频率的转速检测装置 - Google Patents

一种基于电源控制及输出脉冲频率的转速检测装置 Download PDF

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WO2017036000A1
WO2017036000A1 PCT/CN2015/098411 CN2015098411W WO2017036000A1 WO 2017036000 A1 WO2017036000 A1 WO 2017036000A1 CN 2015098411 W CN2015098411 W CN 2015098411W WO 2017036000 A1 WO2017036000 A1 WO 2017036000A1
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module
output pulse
rotation speed
power supply
supply control
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PCT/CN2015/098411
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French (fr)
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尤为
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无锡伊佩克科技有限公司
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors

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  • the invention relates to a speed measuring device, in particular to a speed detecting device based on power supply control and output pulse frequency, belonging to the field of speed detection.
  • Traditional vehicle speed detection methods include radar speed measurement, laser speed measurement, infrared speed measurement, ultrasonic speed measurement and toroidal coil detection. These methods have certain limitations in use, mainly reflected in: First, the measurement accuracy is limited; Second, it is found that when the vehicle is speeding, it cannot provide comprehensive traffic information such as the type of vehicle and the license plate number of the illegal vehicle, and cannot make the illegal vehicle. Dispose of in time; Third, the equipment is easy to damage and the maintenance cost is high. At present, the vehicle speed detection basically adds a detecting unit near the tire to detect various parameters generated by the tire rotation, and calculates and judges the vehicle speed through various parameters, but the detection result and the speed precision need to be further improved.
  • the electronic instrument determines the speed of the vehicle by detecting the frequency of the vehicle speed sensor signal, such as 1 Hz for 1 km/h and 60 Hz for 60 km/h.
  • This method has two limitations in the design of the instrument software: it is required to accurately know the three data values of D, m, and n. Any one of the parameters is inaccurate, which will result in inaccurate detection of the vehicle speed. If any parameter is unknown, the design cannot be completed.
  • the model changes when any one of the three parameters changes, the instrument software must be modified accordingly, that is, the instrument model should be changed accordingly, and the vehicle is already One correspondence, the increase in the number of models brings various problems in production, management, sales and other business links.
  • the beneficial effects of the technical solution are convenient and feasible, and the instrument software designer does not need to pay attention to the mechanical structure and related parameters of the whole vehicle, reduces the technical work of the supply and demand sides in the product development process, shortens the development cycle, and applies to all the same dimensions of the instrument. Model. However, there is room for further improvement in speed measurement accuracy.
  • a vehicle speed detection method based on enumeration heuristics, by marking three lane lines on the image, manually marking not less than three pairs of feature points, establishing a mapping table, delineating the tracking area, and constructing a
  • the background image is then used to identify the target by using the difference between the current frame and the background image.
  • the ratio method is used to find the feature points, and finally the enumeration method is used to calculate the vehicle speed.
  • the vehicle speed detecting method of the invention can detect the speed of the in-transit vehicle in real time and accurately, and can cooperate with other applications of the intelligent transportation system to quickly obtain comprehensive information of the illegal vehicle without being restricted by the environment. It is suitable for the monitoring of vehicle speed in intelligent traffic management and reduces the occurrence of traffic accidents. It has broad application prospects.
  • the invention solves the vehicle speed measurement, it needs to be further improved in the speed measurement accuracy.
  • the technical problem to be solved by the present invention is to provide a rotation speed detecting device based on power supply control and output pulse frequency for the deficiencies of the background art.
  • a rotation speed detecting device based on power supply control and output pulse frequency, comprising a rotation speed sensor, a pulse shaping amplification circuit, a microcontroller module, a display module and a power controller, wherein the rotation speed sensor is connected to the microcontroller module through a pulse shaping amplification circuit,
  • the display module is connected to a corresponding port of the microcontroller module, the rotation speed sensor comprises a light source emitter, a rotating gear and a photoelectric sensor, and the light source emitter and the photoelectric sensor are disposed on two sides of the rotating gear;
  • the power controller includes a sampling filter circuit, a magnetic bias detecting circuit, a DSP module, a CPLD module, an isolated driving circuit, a power amplifying circuit, and a remote communication module; the sampling filter circuit, a magnetic bias detecting circuit, a power amplifying circuit, and a remote communication
  • the module is connected to a corresponding port of the DSP module, and the DSP module is connected to the isolation driving circuit through the CPLD module;
  • the light source emitter is configured to generate a continuous light pulse
  • a photoelectric sensor for converting the received light pulse passing through the rotating gear into an electrical output pulse
  • a pulse shaping amplifying circuit for shaping and amplifying an electrical output pulse generated by the photoelectric sensor
  • the microcontroller module is configured to obtain the engine speed of the automobile according to the number of electric output pulses in the unit time;
  • a display module for real-time display of the engine speed of the vehicle as analyzed by the microcontroller module.
  • a light source detecting device based on a power source control and an output pulse frequency, the light source emitter is a light emitting diode.
  • the chip type of the photoelectric sensor is E3JK-5M3.
  • a rotational speed detecting device based on a power supply control and an output pulse frequency
  • the microcontroller module uses a FLEX10K series CPLD chip.
  • the display module is an LCD display screen.
  • the present invention has the following technical effects:
  • the invention has simple structure, high measurement precision, strong anti-interference ability and can accurately measure the rotational speed of the automobile generator, simplifies the hardware circuit, reduces the product cost, shortens the design cycle, and improves the reliability and flexibility of the system. ;
  • the anti-interference ability of the invention is strong and can accurately measure the rotational speed of the automobile engine; the invention converts the optical signal into an output pulse by the photoelectric sensor and transmits the pulse to the microcontroller module through the pulse shaping amplifying circuit to calculate the actual engine speed.
  • Figure 1 is a schematic view of the structure of the present invention.
  • a rotation speed detecting device based on power supply control and output pulse frequency includes a rotation speed sensor, a pulse shaping amplification circuit, a microcontroller module, a display module and a power supply controller, and the rotation speed sensor passes through a pulse shaping amplifying circuit Connecting a microcontroller module, the display module being connected to a corresponding port of the microcontroller module, the rotation speed sensor comprising a light source emitter, a rotating gear and a photoelectric sensor, wherein the light source emitter and the photoelectric sensor are disposed on two rotating gears side;
  • the power controller includes a sampling filter circuit, a magnetic bias detecting circuit, a DSP module, a CPLD module, an isolated driving circuit, a power amplifying circuit, and a remote communication module; the sampling filter circuit, a magnetic bias detecting circuit, and a power amplification The circuit and the remote communication module are connected to corresponding ports of the DSP module, and the DSP module is connected to the isolation driving circuit through the CPLD module;
  • the light source emitter is configured to generate a continuous light pulse
  • a photoelectric sensor for converting the received light pulse passing through the rotating gear into an electrical output pulse
  • a pulse shaping amplifying circuit for shaping and amplifying an electrical output pulse generated by the photoelectric sensor
  • the microcontroller module is configured to obtain the engine speed of the automobile according to the number of electric output pulses in the unit time;
  • a display module for real-time display of the engine speed of the vehicle as analyzed by the microcontroller module.
  • the light source emitter is a light emitting diode
  • the chip type of the photoelectric sensor is E3JK-5M3
  • the microcontroller module uses a FLEX10K series CPLD chip
  • the display module is an LCD display.
  • the invention has the advantages of simple structure, high measurement precision, strong anti-interference ability and accurate measurement of the rotational speed of the automobile generator, simplifies the hardware circuit, reduces the product cost, shortens the design cycle, and improves the reliability and flexibility of the system;
  • the invention has strong anti-interference ability and can accurately measure the rotational speed of the automobile engine.
  • the invention converts the optical signal into an output pulse through the photoelectric sensor and transmits the pulse to the microcontroller module through the pulse shaping amplifying circuit to calculate the actual engine speed.
  • the photoelectric speed detection first uses the mechanical transmission method to convert the rotation speed of the wheel pair into a change of the luminous flux, and then converts the change of the luminous flux into the change of the electric flux through the photoelectric conversion element, that is, converts the light pulse into an electric pulse signal, and passes the pair
  • the calculation of the electrical pulse gives the rotational speed.
  • the working principle of the photoelectric conversion element is that when the light illuminates a certain substance, if the incident photon energy is sufficiently large, the electrons escape the surface of the substance, or the resistance changes, or a change in the electromotive force is generated.
  • the FLEX10K family of devices is an embedded PLD product, and each FLEX10K device includes an embedded array and a logic array.
  • the embedded array consists of embedded array blocks that implement a variety of complex logic functions.
  • a logic array consists of logic array blocks that implement general purpose logic.
  • the FLEX10K device features a reconfigurable CNOSSRAM cell that combines all the features needed to implement a universal multifunction gate array with device capacities ranging from 10,000 to 250,000 gates. With low power consumption, flexible interconnection, and support for multi-voltage I/O interfaces, the entire system can be integrated into a single device with high density, high speed, and high performance.

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  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

一种基于电源控制及输出脉冲频率的转速检测装置，包含转速传感器、脉冲整形放大电路、微控制器模块和显示模块，所述转速传感器通过脉冲整形放大电路连接微控制器模块，所述显示模块连接在微控制器模块的相应端口上，所述转速传感器包含光源发射器、转动齿轮和光电传感器，所述光源发射器和光电传感器设置在转动齿轮的两侧。该转速检测装置结构简单、测量精度高。

Description

一种基于电源控制及输出脉冲频率的转速检测装置 技术领域
本发明涉及一种测速装置，尤其涉及一种基于电源控制及输出脉冲频率的转速检测装置，属于速度检测领域。
背景技术
目前，在我国交通运输过程中普遍存在着车辆超速行驶的现象，这种行为不但易对驾驶者造成伤害，还会对路边的行人或者其他车辆产生威胁，由此引发的交通事故屡见不鲜，给社会和人们的生命财产安全造成极大的危害。如何准确、高效的检测出在途车辆的行驶速度已经成为交通管理部门亟待解决的一个重要问题。
传统的车速检测方法有雷达测速、激光测速、红外测速、超声波测速和环形线圈检测等。这些方法在使用中都有一定的局限性，主要体现在：一，测量精度有限；二，发现车辆超速行驶时不能提供违章车辆的汽车类型和车牌号码等全面的交通信息，无法对违章车辆做出及时处理；三，设备易损坏，维护费用高。目前车速检测基本上都是在轮胎附近添加检测单元，用于检测轮胎转动所产生的各项参数，通过各项参数来计算判断车速，但是检测结果和速度精度都有待进一步提升。
电子仪表都是通过检测车速传感器信号的频率来确定车速的大小，如1Hz对应1km/h，60Hz对应60km/h。车速信号的频率一般由3个参数决定：轮胎直径D(或周长)，该参数可将轮胎的线速度即车速v(单位km/h)，转换成角速度ω1(单位rPm)，公式如下：ω1＝v/60πD，不同的车型轮胎直径不一样；传动比n，变速箱输出轴到轮胎之间经过的减速比n，该参数可将轮胎角速度ω1转换成齿轮箱输出轴角速度ω2，公式如下：ω2＝nω1，不同的车型传动比不一样；每转脉冲数m，传感器和齿轮箱配合，齿轮箱输出轴每转一圈，传感器产生m个脉冲信号，该参数将齿轮箱输出轴角速度ω2转换成仪表检测到的脉冲信号频率P(单位：Hz)，公式如下：P＝mω2/60＝m nω1/60＝mnv/(3600πD)。
通常仪表车速算法根据检测到的频率数值P，经过公式：v＝3600πD P/(mn)计算得到车速数值。即：v＝kP，常数k＝3600πD/(mn)。这种方法在仪表软件设计时有两点限制：要求能准确获知D、m、n这三个数据值，任何一个参数不准都会导致车速检测不准，任何一个参数未知时设计就无法完成；车型变化时，这三个参数中任何一个参数发生变化时，仪表软件都要作相应修改，也即要仪表型号作相应变化，已便与整车一 一对应，型号增多给生产、管理、销售等各个经营环节带来的麻烦不一而足。
例如申请号为“201210342552.1”的一种车速检测方法，通过让整车以预定的速度v运行，可在整车检测线上车速测试台上进行，此时仪表检测到的信号频率P，经计算后得到k＝v/P，并将此值存入仪表系统中，作为仪表正常工作时的常数k，当仪表正常工作时，车速为v＝kP。采用本技术方案的有益效果方便可行，仪表软件设计者无须关注整车机械结构及相关参数，减少了产品开发过程中供需双方的技术交底工作，缩短了开发周期，适用于仪表外形尺寸相同的所有车型。但是在测速精度方面有待进一步提升。
又如申请号为“201310045928.7”一种基于枚举试探的车速检测方法，通过在图像上划出三条车道线，手动标记不少于三对特征点，建立映射表，划定跟踪区域，构建一幅背景图像，然后采用当前帧和背景图像做差分的方法进行目标识别，利用比率法寻找特征点，最后再利用枚举试探的方法计算车速。该发明的车速检测方法，能够实时、精确的检测出在途车辆的速度，配合智能交通系统的其他应用可迅速得到违章车辆的全面信息，不受环境限制。适用于智能交通管理中对车速的监测，减少交通事故的发生，具有广阔的应用前景。该发明虽然解决了车速测量，但是在测速精度方面有待进一步提升。
发明内容
本发明所要解决的技术问题是针对背景技术的不足提供了一种基于电源控制及输出脉冲频率的转速检测装置。
本发明为解决上述技术问题采用以下技术方案：
一种基于电源控制及输出脉冲频率的转速检测装置，包含转速传感器、脉冲整形放大电路、微控制器模块、显示模块和电源控制器，所述转速传感器通过脉冲整形放大电路连接微控制器模块，所述显示模块连接在微控制器模块的相应端口上，所述转速传感器包含光源发射器、转动齿轮和光电传感器，所述光源发射器和光电传感器设置在转动齿轮的两侧；
所述电源控制器包含采样滤波电路、磁偏检测电路、DSP模块、CPLD模块、隔离驱动电路、功率放大电路、远程通讯模块；所述采样滤波电路、磁偏检测电路、功率放大电路、远程通讯模块连接在DSP模块的相应端口上，所述DSP模块通过CPLD模块连接隔离驱动电路；
其中，所述光源发射器，用于产生持续的光脉冲；
光电传感器，用于将接收的通过转动齿轮的光脉冲转换成电输出脉冲；
脉冲整形放大电路，用于对光电传感器产生的电输出脉冲进行整形放大处理；
微控制器模块，用于根据采集单位时间内电输出脉冲个数进而得出汽车发动机转速；
显示模块，用于实时显示微控制器模块分析得出的汽车发动机转速。
作为本发明一种基于电源控制及输出脉冲频率的转速检测装置的进一步优选方案，所述光源发射器为发光二极管。
作为本发明一种基于电源控制及输出脉冲频率的转速检测装置的进一步优选方案，所述光电传感器的芯片型号为E3JK-5M3。
作为本发明一种基于电源控制及输出脉冲频率的转速检测装置的进一步优选方案，所述微控制器模块采用FLEX10K系列的CPLD芯片。
作为本发明一种基于电源控制及输出脉冲频率的转速检测装置的进一步优选方案，所述显示模块为LCD显示屏。
本发明采用以上技术方案与现有技术相比，具有以下技术效果：
1、本发明结构简单、测量精度高、抗干扰能力强且能够精确地测量汽车发电机的转速，简化了硬件电路，降低了产品成本，缩短了设计周期，提高了系统的可靠性和灵活性；
2、本发明抗干扰能力强且能够精确地测量汽车发动机的转速；本发明通过光电传感器将光信号转换成输出脉冲进而通过脉冲整形放大电路传输至微控制器模块计算得出发动机实际转速。
附图说明
图1是本发明的结构原理图。
具体实施方式
下面结合附图对本发明的技术方案做进一步的详细说明：
如图1所示，一种基于电源控制及输出脉冲频率的转速检测装置，包含转速传感器、脉冲整形放大电路、微控制器模块、显示模块和电源控制器，所述转速传感器通过脉冲整形放大电路连接微控制器模块，所述显示模块连接在微控制器模块的相应端口上，所述转速传感器包含光源发射器、转动齿轮和光电传感器，所述光源发射器和光电传感器设置在转动齿轮的两侧；
所述电源控制器包含采样滤波电路、磁偏检测电路、DSP模块、CPLD模块、隔离驱动电路、功率放大电路、远程通讯模块；所述采样滤波电路、磁偏检测电路、功率放大 电路、远程通讯模块连接在DSP模块的相应端口上，所述DSP模块通过CPLD模块连接隔离驱动电路；
其中，所述光源发射器，用于产生持续的光脉冲；
光电传感器，用于将接收的通过转动齿轮的光脉冲转换成电输出脉冲；
脉冲整形放大电路，用于对光电传感器产生的电输出脉冲进行整形放大处理；
微控制器模块，用于根据采集单位时间内电输出脉冲个数进而得出汽车发动机转速；
显示模块，用于实时显示微控制器模块分析得出的汽车发动机转速。
其中，所述光源发射器为发光二极管，所述光电传感器的芯片型号为E3JK-5M3，所述微控制器模块采用FLEX10K系列的CPLD芯片，所述显示模块为LCD显示屏。
本发明结构简单、测量精度高、抗干扰能力强且能够精确地测量汽车发电机的转速，简化了硬件电路，降低了产品成本，缩短了设计周期，提高了系统的可靠性和灵活性；本发明抗干扰能力强且能够精确地测量汽车发动机的转速；本发明通过光电传感器将光信号转换成输出脉冲进而通过脉冲整形放大电路传输至微控制器模块计算得出发动机实际转速。
目前大多数汽车速度检测都是通过在轮胎附近设置速度传感器检测速度，但是在精确度上远不如通过光电检测来的准确。
光电速度检测首先利用机械传动方式，将机车轮对的转速转化成光通量的变化，再通过光电转换元件将光通量的变化转换成电通量的变化，即把光脉冲转换成电脉冲信号，通过对电脉冲的计算得出转速。光电转换元件的的工作原理，即当光照射某种物质时，若入射光子能量足够大，致使电子逸出物质表面，或者电阻发生变化，或者产生电动势的变化。
FLEX10K系列器件是嵌入式PLD产品，每个FLEX10K器件包含一个嵌入式阵列和一个逻辑阵列。嵌入式阵列由一些嵌入式阵列块组成，用于实现各种复杂的逻辑功能。逻辑阵列由逻辑阵列块组成，用于实现通用逻辑。FLEX10K器件采用可重构的CNOSSRAM单元，其结构集成了实现通用多功能门阵列所需的全部特征，器件容量可达1万～25万门。具有功耗低、互连方式灵活、支持多电压I/O接口等特点，能够高密度、高速度、高性能地将整个系统集成于单个器件中。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本发明所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本 发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
本技术领域技术人员可以理解的是，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)具有与本发明所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样定义，不会用理想化或过于正式的含义来解释。
以上实施例仅为说明本发明的技术思想，不能以此限定本发明的保护范围，凡是按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明保护范围之内。上面对本发明的实施方式作了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以再不脱离本发明宗旨的前提下做出各种变化。

Claims (5)

  1. 一种基于电源控制及输出脉冲频率的转速检测装置，其特征在于：包含转速传感器、脉冲整形放大电路、微控制器模块、显示模块和电源控制器，所述转速传感器通过脉冲整形放大电路连接微控制器模块，所述显示模块连接在微控制器模块的相应端口上，所述转速传感器包含光源发射器、转动齿轮和光电传感器，所述光源发射器和光电传感器设置在转动齿轮的两侧；
    所述电源控制器包含采样滤波电路、磁偏检测电路、DSP模块、CPLD模块、隔离驱动电路、功率放大电路、远程通讯模块；所述采样滤波电路、磁偏检测电路、功率放大电路、远程通讯模块连接在DSP模块的相应端口上，所述DSP模块通过CPLD模块连接隔离驱动电路；
    其中，所述光源发射器，用于产生持续的光脉冲；
    光电传感器，用于将接收的通过转动齿轮的光脉冲转换成电输出脉冲；
    脉冲整形放大电路，用于对光电传感器产生的电输出脉冲进行整形放大处理；
    微控制器模块，用于根据采集单位时间内电输出脉冲个数进而得出汽车发动机转速；
    显示模块，用于实时显示微控制器模块分析得出的汽车发动机转速。
  2. 根据权利要求1所述的一种基于电源控制及输出脉冲频率的转速检测装置，其特征在于：所述光源发射器为发光二极管。
  3. 根据权利要求1所述的一种基于电源控制及输出脉冲频率的转速检测装置，其特征在于：所述光电传感器的芯片型号为E3JK-5M3。
  4. 根据权利要求1所述的一种基于电源控制及输出脉冲频率的转速检测装置，其特征在于：所述微控制器模块采用FLEX10K系列的CPLD芯片。
  5. 根据权利要求1所述的一种基于电源控制及输出脉冲频率的转速检测装置，其特征在于：所述显示模块为LCD显示屏。
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