WO2016165449A1 - 一种实现测距的方法和装置 - Google Patents
一种实现测距的方法和装置 Download PDFInfo
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- WO2016165449A1 WO2016165449A1 PCT/CN2016/072311 CN2016072311W WO2016165449A1 WO 2016165449 A1 WO2016165449 A1 WO 2016165449A1 CN 2016072311 W CN2016072311 W CN 2016072311W WO 2016165449 A1 WO2016165449 A1 WO 2016165449A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S17/36—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
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- This application relates to, but is not limited to, terminal technology.
- This paper proposes a method and device for realizing ranging, which can reduce hardware costs.
- a method for implementing ranging includes:
- the signal reflected by the measured object is received, and the distance from the measured object is calculated according to the measured signal and the reflected signal.
- the method further includes:
- the reflected signal is filtered and amplified.
- the transmitting the measurement signal to the measured object by modulating the LED light comprises:
- the signal transmitted by the receiving object includes:
- the calculating the distance from the measured object according to the measured signal and the reflected signal includes:
- calculating the distance from the measured object according to the measured signal and the reflected signal includes:
- the calculating the distance between the measured object and the measured object includes:
- the method further includes:
- N is an integer greater than 1.
- a device for realizing ranging includes:
- the sending module is configured to: send a measurement signal to the measured object by modulating the LED light;
- a receiving module configured to: receive a signal reflected by the object to be tested
- the detection calculation module is configured to calculate a distance from the measured object according to the measurement signal and the reflected signal.
- it also includes:
- the processing module is configured to: filter and amplify the reflected signal.
- the sending module is configured to:
- the receiving module is set to:
- the detection calculation module is set to:
- the detection calculation module is set to:
- the detection calculation module is set to:
- a computer readable storage medium storing computer executable instructions for performing the method of any of the above.
- the technical solution of the embodiment of the present invention includes: transmitting a measurement signal to the object to be tested through the LED; receiving a signal reflected by the object, and calculating a distance from the object according to the measurement signal and the reflected signal.
- the measurement signal is transmitted through the LED. Since the LED is a standard component of the mobile terminal, the transmission module does not need to be added, the hardware cost is reduced, and the LED light is visible light, and the security is high.
- phase difference is used to calculate the distance from the object to be measured, thereby improving the measurement accuracy.
- FIG. 1 is a flowchart of a method for implementing ranging according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a device for realizing ranging according to an embodiment of the present invention.
- an embodiment of the present invention provides a method for implementing ranging, including:
- Step 100 Send a measurement signal to the object to be measured by modulating LED (Light Emitting Diode) light.
- LED Light Emitting Diode
- a first electrical signal corresponding to the measurement signal is generated, and the LED light is modulated into a first optical signal by the first electrical signal and transmitted.
- the first electrical signal may be a square wave periodic signal.
- the measurement signal can be sent to the object through the LED after receiving an instruction from the user to start ranging.
- the user can input an instruction to start ranging by using a virtual button or a physical button.
- Step 101 Receive a signal reflected by the measured object, and calculate a distance from the measured object according to the measured signal and the reflected signal.
- the method further includes: filtering and amplifying the reflected signal.
- the signal transmitted by the received object includes:
- Calculating the distance from the measured object based on the measured signal and the reflected signal includes:
- a distance from the object to be measured is calculated based on the first electrical signal and the second electrical signal.
- calculating the distance from the measured object according to the measured signal and the reflected signal includes:
- the initial time difference refers to a time difference corresponding to the phase difference measured when the distance between the object and the object is zero.
- calculating the distance from the measured object according to the calculated time difference includes:
- the distance can be displayed on the display.
- the method may further include repeating the above steps N times, and calculating an average value of the distances obtained N times; wherein N is an integer greater than 1.
- an embodiment of the present invention further provides an apparatus for implementing ranging, including:
- the sending module 21 is configured to: send a measurement signal to the object to be tested 25 by modulating the LED light;
- the receiving module 22 is configured to: receive a signal reflected by the object to be tested 25;
- the detection calculation module 23 is configured to calculate a distance from the measured object 25 based on the measurement signal and the reflected signal.
- the processing module 24 is configured to: filter and amplify the reflected signal.
- the processing module 24 can be implemented by using a filter and an amplifier.
- the sending module 21 is configured to:
- the receiving module 22 is set to:
- the detection calculation module 23 is set to:
- the distance from the object to be tested 25 is calculated based on the first electrical signal and the second electrical signal.
- the sending module 21 can adopt a field programmable gate array (FPGA, Field) The Programmable Gate Array), the LED driving circuit and the LED are implemented, the first electrical signal is generated by the FPGA, the generated first electrical signal is modulated onto the LED driving circuit, and the LED is driven to emit light.
- FPGA field programmable gate array
- the LED driving circuit and the LED are implemented, the first electrical signal is generated by the FPGA, the generated first electrical signal is modulated onto the LED driving circuit, and the LED is driven to emit light.
- the receiving module 22 can be implemented by using a photoelectric sensor.
- the function of the detection calculation module 23 may be implemented by a processor (for example, a CPU) executing a program/instruction stored in the memory, or may be implemented by a hardware circuit.
- the detection calculation module 23 is configured to:
- the FPGA can also be used to obtain the time difference corresponding to the phase difference between the measured signal and the reflected signal.
- the detection calculation module 23 is configured to:
- all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
- the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
- the device/function module/functional unit in the above embodiment When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
- the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
- the measurement signal is transmitted by modulating the LED light. Since the LED is a standard component of the mobile terminal, the transmission module does not need to be added, the hardware cost is reduced, and the LED light is visible light, and the security is high.
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
一种实现测距的方法和装置，其中该方法包括：通过调制LED光向被测物发送测量信号（100）；接收被测物反射的信号，根据测量信号和反射的信号计算与被测物之间的距离（101）。该测距方法和装置通过LED发送测量信号，由于LED为移动终端的标配元件，不需要增加发送模块，降低了硬件成本，并且LED光为可见光，安全性较高。
Description
本申请涉及但不限于终端技术。
相关技术的实现测距的方法大致包括：
通过红外线(或激光、或超声波等)向被测物发送测量信号，接收被测物反射的信号，根据发送测量信号和接收到反射的信号之间的时间差计算与被测物之间的距离并显示。
相关技术的实现测距的方法中，往往需要增加红外线(或激光、或超声波等)发送模块来实现测距，增加了硬件成本。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本文提出了一种实现测距的方法和装置，能够降低硬件成本。
一种实现测距的方法，包括：
通过调制发光二极管LED光向被测物发送测量信号；
接收被测物反射的信号，根据测量信号和反射的信号计算与被测物之间的距离。
可选地，所述接收被测物反射的信号后，在所述根据测量信号和反射的信号计算与被测物之间的距离之前还包括：
对所述反射的信号进行滤波和放大。
可选地，所述通过调制LED光向被测物发射测量信号包括：
产生所述测量信号对应的第一电信号，通过所述第一电信号将所述LED光调制成第一光信号并发送；
所述接收被测物发射的信号包括：
接收所述被测物反射的第二光信号，将所述第二光信号转换成第二电信号；
所述根据测量信号和反射的信号计算与被测物之间的距离包括：
根据所述第一电信号和所述第二电信号计算与所述被测物之间的距离。
可选地，所述根据测量信号和反射的信号计算与被测物之间的距离包括：
获取所述测量信号和所述反射的信号之间的相位差对应的时间差；
计算获得的时间差和初始时间差之间的时间差值；
根据计算得到的时间差值计算与所述被测物之间的距离。
可选地，所述根据计算得到的时间差值计算与被测物之间的距离包括：
按照公式
计算与所述被测物之间的距离；
其中，S为与所述被测物之间的距离，c为光速，t为所述计算得到的时间差值。
可选地，该方法还包括：
重复上述步骤N次，计算N次得到的距离的平均值；其中，N为大于1的整数。
一种实现测距的装置，包括：
发送模块，设置为：通过调制LED光向被测物发送测量信号；
接收模块，设置为：接收被测物反射的信号；
检测计算模块，设置为：根据测量信号和反射的信号计算与被测物之间的距离。
可选地，还包括：
处理模块，设置为：对所述反射的信号进行滤波和放大。
可选地，所述发送模块是设置为：
产生所述测量信号对应的第一电信号，通过所述第一电信号将所述LED
光调制成第一光信号并发送；
所述接收模块是设置为：
接收所述被测物反射的第二光信号，将所述第二光信号转换成第二电信号；
所述检测计算模块是设置为：
根据所述第一电信号和所述第二电信号计算与所述被测物之间的距离。
可选地，所述检测计算模块是设置为：
获取所述测量信号和所述反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；根据计算得到的时间差值计算与所述被测物之间的距离。
可选地，所述检测计算模块是设置为：
获取所述测量信号和所述反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；按照公式
计算与所述被测物之间的距离；其中，S为与所述被测物之间的距离，c为光速，t为所述计算得到的时间差值。
一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行上述任一项的方法。
与相关技术相比，本发明实施例的技术方案包括：通过LED向被测物发送测量信号；接收被测物反射的信号，根据测量信号和反射的信号计算与被测物之间的距离。通过本发明实施例的方案，通过LED来发送测量信号，由于LED为移动终端的标配元件，不需要增加发送模块，降低了硬件成本，并且LED光为可见光，安全性较高。
进一步地，采用相位差计算与被测物之间的距离，从而提高了测量精度。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为本发明实施例实现测距的方法的流程图；
图2为本发明实施例实现测距的装置的结构组成示意图。
下面结合附图对本发明的实施方式进行描述。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
参见图1，本发明实施例提出了一种实现测距的方法，包括：
步骤100、通过调制LED(Light Emitting Diode，发光二极管)光向被测物发送测量信号。包括：
产生测量信号对应的第一电信号，通过第一电信号将LED光调制成第一光信号并发送。
其中，第一电信号可以是方波周期信号。
本步骤中，可以在接收到来自用户的开始进行测距的指令后通过LED向被测物发送测量信号。
其中，用户可以通过虚拟按钮或物理按钮来输入开始进行测距的指令。
步骤101、接收被测物反射的信号，根据测量信号和反射的信号计算与被测物之间的距离。
本步骤中，接收被测物反射的信号后，在根据测量信号和反射的信号计算与被测物之间的距离之前还包括：对反射的信号进行滤波和放大。
本步骤中，接收被测物发射的信号包括：
接收被测物反射的第二光信号，将第二光信号转换成第二电信号；
根据测量信号和反射的信号计算与被测物之间的距离包括：
根据第一电信号和第二电信号计算与被测物之间的距离。
本步骤中，根据测量信号和反射的信号计算与被测物之间的距离包括：
获取测量信号和反射的信号之间的相位差对应的时间差；计算获得的时
间差和初始时间差之间的时间差值；根据计算得到的时间差值计算与被测物之间的距离。
其中，初始时间差是指与被测物之间的距离为0时测量得到的相位差对应的时间差。
其中，根据计算得到的时间差值计算与被测物之间的距离包括：
按照公式
计算与被测物之间的距离；
其中，S为与被测物之间的距离，c为光速，t为计算得到的时间差值。
本步骤中，得到距离后可以在显示屏上显示。
该方法还可包括：重复上述步骤N次，计算N次得到的距离的平均值；其中，N为大于1的整数。
参见图2，本发明实施例还提出了一种实现测距的装置，包括：
发送模块21，设置为：通过调制LED光向被测物25发送测量信号；
接收模块22，设置为：接收被测物25反射的信号；
检测计算模块23，设置为：根据测量信号和反射的信号计算与被测物25之间的距离。
本发明实施例的装置中，还可包括：
处理模块24，设置为：对反射的信号进行滤波和放大。
其中，处理模块24可以采用滤波器和放大器来实现。
本发明实施例的装置中，发送模块21是设置为：
产生测量信号对应的第一电信号，通过第一电信号将LED光调制成第一光信号并发送；
接收模块22是设置为：
接收被测物25反射的第二光信号，将第二光信号转换成第二电信号；
检测计算模块23是设置为：
根据第一电信号和第二电信号计算与被测物25之间的距离。
其中，发送模块21可以采用现场可编程门阵列(FPGA，Field
Programmable Gate Array)、LED驱动电路和LED来实现，通过FPGA来产生第一电信号，将产生的第一电信号调制到LED驱动电路上，驱动LED进行发光。
其中，接收模块22可以采用光电传感器来实现。
其中，检测计算模块23的功能可以通过处理器(例如CPU)执行存储在存储器中的程序/指令来实现，也可以通过硬件电路来实现。
本发明实施例的装置中，检测计算模块23是设置为：
获取测量信号和反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；根据计算得到的时间差值计算与被测物25之间的距离。
其中，也可以采用FPGA来获取测量信号和反射的信号之间的相位差对应的时间差。
本发明实施例的装置中，检测计算模块23是设置为：
获取测量信号和反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；按照公式
计算与被测物之间的距离；其中，S为与被测物之间的距离，c为光速，t为计算得到的时间差值。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。
上述实施例中的装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。
上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
通过本发明实施例的方案，通过调制LED光来发送测量信号，由于LED为移动终端的标配元件，不需要增加发送模块，降低了硬件成本，并且LED光为可见光，安全性较高。
Claims (12)
- 一种实现测距的方法，包括：通过调制发光二极管LED光向被测物发送测量信号；接收被测物反射的信号，根据测量信号和反射的信号计算与被测物之间的距离。
- 根据权利要求1所述的方法，其中，所述接收被测物反射的信号后，在所述根据测量信号和反射的信号计算与被测物之间的距离之前还包括：对所述反射的信号进行滤波和放大。
- 根据权利要求1所述的方法，其中，所述通过调制LED光向被测物发射测量信号包括：产生所述测量信号对应的第一电信号，通过所述第一电信号将所述LED光调制成第一光信号并发送；所述接收被测物发射的信号包括：接收所述被测物反射的第二光信号，将所述第二光信号转换成第二电信号；所述根据测量信号和反射的信号计算与被测物之间的距离包括：根据所述第一电信号和所述第二电信号计算与所述被测物之间的距离。
- 根据权利要求1或2或3所述的方法，其中，所述根据测量信号和反射的信号计算与被测物之间的距离包括：获取所述测量信号和所述反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；根据计算得到的时间差值计算与所述被测物之间的距离。
- 根据权利要求4所述的方法，其中，所述根据计算得到的时间差值计算与被测物之间的距离包括：按照公式计算与所述被测物之间的距离；
其中，S为与所述被测物之间的距离，c为光速，t为所述计算得到的时间差值。 - 根据权利要求1或2或3所述的方法，该方法还包括：重复上述步骤N次，计算N次得到的距离的平均值；其中，N为大于1的整数。
- 一种实现测距的装置，包括：发送模块，设置为：通过调制LED光向被测物发送测量信号；接收模块，设置为：接收被测物反射的信号；检测计算模块，设置为：根据测量信号和反射的信号计算与被测物之间的距离。
- 根据权利要求7所述的装置，还包括：处理模块，设置为：对所述反射的信号进行滤波和放大。
- 根据权利要求7所述的装置，其中，所述发送模块是设置为：产生所述测量信号对应的第一电信号，通过所述第一电信号将所述LED光调制成第一光信号并发送；所述接收模块是设置为：接收所述被测物反射的第二光信号，将所述第二光信号转换成第二电信号；所述检测计算模块是设置为：根据所述第一电信号和所述第二电信号计算与所述被测物之间的距离。
- 根据权利要求7或8或9所述的装置，其中，所述检测计算模块是设置为：获取所述测量信号和所述反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；根据计算得到的时间差值计算与所述被测物之间的距离。
- 根据权利要求10所述的装置，其中，所述检测计算模块是设置为：获取所述测量信号和所述反射的信号之间的相位差对应的时间差；计算获得的时间差和初始时间差之间的时间差值；按照公式计算与所述被测物之间的距离；其中，S为与所述被测物之间的距离，c为光速，t为所述计算得到的时间差值。
- 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1-6任一项的方法。
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| JP2005164482A (ja) * | 2003-12-04 | 2005-06-23 | Nissan Motor Co Ltd | 測距機能付ｌｅｄランプ装置 |
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| CN1991407A (zh) * | 2005-10-28 | 2007-07-04 | 夏普株式会社 | 光学式测距装置 |
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| JP2005164482A (ja) * | 2003-12-04 | 2005-06-23 | Nissan Motor Co Ltd | 測距機能付ｌｅｄランプ装置 |
| JP2006021720A (ja) * | 2004-07-09 | 2006-01-26 | Nissan Motor Co Ltd | 距離計測機能付きランプ装置 |
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