CN103575292B - Measurement apparatus and measuring method - Google Patents

Abstract

A measuring device includes a processor, a camera unit and a G-sensor unit. The camera unit shoots and acquires an image of at least one target, and the G-sensor unit correspondingly generates a return value identifying a component of the measuring device in the direction of a coordinate axis Z. The processor uses the first formula and the second formula to calculate the distance from the measuring device to the at least one target according to the returned value and the pre-stored reference value. The invention also provides a measuring method applied to a measuring device. Utilize the present invention, obtain the image of at least one target by setting camera unit, make G-sensor unit output a return value accordingly, and carry out target distance, height and average speed calculation according to this return value and pre-stored reference value, thereby solve The technical problem that the measurement device in the prior art cannot perform short and accurate measurement by using GPS is solved.

Description

Measuring device and measuring method

technical field

The invention relates to a device and a measuring method for measuring the position, height and velocity of a target object located at a certain distance.

Background technique

With the development of mobile technology, portable mobile devices, such as smart phones, tablet computers, etc., have more and more additional functions in addition to satisfying basic functions. Among them, the GPS (Global Position System, Global Positioning System) is usually installed in the mobile device for positioning and navigation of the user, and simultaneously measures the distance and/or height of a target at a certain distance, and the moving speed of the user. In the prior art, GPS uses the formula v=Δs/Δt for speed measurement, wherein Δs is the measured distance between the user and the target, and Δt is the time taken to move to the target. However, the accuracy of △s is usually 10m, and there is a large error when measuring a small distance, so the average speed in a small distance cannot be measured. Moreover, GPS is generally only capable of measuring altitude, but cannot be used to measure the height of target objects. At the same time, the response time required to measure the position, height and speed of the target object using GPS is relatively long, so that the required measurement data cannot be obtained quickly.

Contents of the invention

In view of this, it is necessary to provide a measuring device and a measuring method to solve the problem that the mobile equipment in the prior art cannot measure the distance, average speed and target position height within a short distance by using GPS.

The invention provides a measuring device, including a processor, and the measuring device also includes:

The camera unit is used for shooting and acquiring an image including at least one target when the user adjusts the measuring device. and

The G-sensor unit is used to generate a return value z according to the flip angle of the measurement device when the camera unit acquires an image including at least one target, wherein the return value z is the measurement device in the direction of a coordinate axis Z-axis on the weight.

The processor pre-stores a height reference value, and the processor is used to calculate the distance from the measuring device to the at least one target by using the first formula and the second formula according to the return value z generated by the G-sensor unit and the height reference value.

The present invention also provides a measuring method applied to a measuring device, comprising:

The posture of the measuring device is adjusted at the first time to capture and acquire an image of a target.

A return value is correspondingly generated according to the flip angle of the measuring device when the image of the target is acquired, wherein the return value is a component of the measuring device in the direction of the coordinate axis Z.

According to the return value and a pre-stored height reference value, the distance between the measuring device and the target is calculated by using the first formula and the second formula.

Compared with the prior art, the measurement device and the measurement method provided by the present invention obtain the points to be measured by focusing the target object one or more times by the camera unit provided in the measurement device, and the G-sensor unit obtains the points to be measured according to the focus of the camera unit. The points to be measured output a return value correspondingly, and the processor calculates the distance, height and moving average speed of the target object according to the return value and the reference value pre-stored in the measuring device, thereby solving the problem in the prior art The technical problem that the measuring device cannot make short and accurate measurements using GPS.

Description of drawings

FIG. 1 is a block diagram of a measuring device in an embodiment of the present invention.

FIG. 2 is a schematic diagram of a measuring device performing target distance measurement in an embodiment of the present invention.

Fig. 3 is a schematic diagram of a measurement device performing speed measurement in an embodiment of the present invention.

Fig. 4 is a schematic diagram of measuring the height of a target object by the measuring device in the embodiment of the present invention.

Fig. 5 is a flowchart of a method for measuring a target distance in an embodiment of the present invention.

Fig. 6 is a flowchart of a method for speed measurement in an embodiment of the present invention.

FIG. 7 is a flowchart of a method for measuring the height of a target object in an embodiment of the present invention.

Description of main component symbols

measuring device 10 G-sensor unit 11 camera unit 12 processor 13

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , which is a block diagram of a measuring device in an embodiment of the present invention. The measuring device 10 may be a portable mobile device such as a mobile phone or a tablet computer. The measurement device 10 includes a G-sensor (Gravity-sensor, gravity sensor) unit 11 , a camera unit 12 and a processor 13 . Wherein, the camera unit 12 may include a camera with optoelectronic devices such as a photoconductive camera tube, a solid-state photoelectric sensor (Charge Coupled Device, CCD) or a complementary metal-oxide-semiconductor (Complementary Metal-Oxide-Semiconductor Transistor, CMOS). The camera unit 12 is used to photograph a target, and can automatically focus on the captured target to obtain a clear image. The autofocus principle of the camera unit 12 is the same as the autofocus principle in the prior art, and will not be repeated here. The G-sensor unit 11 is used to obtain a return value z when the camera unit 12 focuses on the target, wherein the return value z is a component of the measuring device 10 in the direction of the coordinate axis Z. The processor 13 is used to calculate the distance L from the measuring device 10 to the target, the average speed v of the user and/or the height H of the target object according to the return value z determined by the G-sensor unit 11 and other related parameters.

Specifically, when the camera unit 12 is shooting a target, it is actually a process of adjusting the posture of the measuring device 10 from the vertical direction to the horizontal direction, and the return value z varies within the range of 0-±255. When the camera unit 12 focuses on a target and determines a focus point, that is, the point to be measured, the G-sensor unit 11 obtains a return value z correspondingly according to the flip angle of the measuring device 10 .

Please refer to FIG. 2 , specifically, when the measuring device 10 measures the distance L of the target, the user judges the actual height value of the measuring device 10 at present through the height reference value h of the measuring device 10 prestored in the measuring device 10 Whether it is consistent with the reference value h, and when it is judged that the actual height value at which the measuring device 10 is currently located is not consistent with the reference value h, the user resets it through the measuring device 10 . In this embodiment, the reference value h is the distance between the measuring device 10 and the horizontal plane when the user uses the measuring device 10 . The processor 13 activates the camera unit 12 to photograph and focus the target, and the user adjusts the posture of the measuring device 10 to obtain a focus point, thereby determining a point to be measured. When the measuring device 10 is adjusted to a certain attitude and the point to be measured is obtained, the G-sensor unit 11 generates a return value z according to the flip angle of the measuring device 10 . The processor 13 acquires the return value z determined by the G-sensor unit 11, and according to the formula tan(θ)=sqrt((255^2-z^2)/z^2), and L=h×tan(θ ) to calculate the distance L between the measuring device 10 and the target, where θ is the angle between the line connecting the measuring device 10 and the target and the vertical direction.

Referring to Fig. 3, when the measurement device 10 is measuring the average speed v, the processor 13 starts the camera unit 12 to take the first shot and focus of the target, and the camera unit 12 determines the first object to be measured at the first time _t1 . point, the processor 13 records the first time t ₁ , and the G-sensor unit 11 correspondingly obtains a first return value z ₁ according to the determined first point to be measured. _The processor _{13 calculates} the measurement device ₁₀ at the _first A first distance L ₁ between the time point t ₁ and the first point to be measured. Similarly, the processor 13 also calculates the measuring device according to the formula tan(θ ₂ )=sqrt((255^2-z ₂ ^2)/z ₂ ^2) and L ₂ =h×tan(θ ₂ ) 10 The distance s ₂ between the second time point t2 and the second point to be measured. At this time, the processor 13 calculates according to the formula v=(L ₂ -L ₁ )/(t ₂ -t ₁ ), the movement of the measuring device 10 between the first time point t ₁ and the second time point t ₂ The average speed of v.

Please refer to FIG. 4 , when the measuring device 10 measures the height H of the target object, the processor 13 starts the camera unit 12 to take the first shot and focus of the lowest point of the target object, thereby obtaining the first point to be measured, G- The sensor unit 11 correspondingly obtains a first return value z ₁ ′ according to the determined first point to be measured. The processor 13 calculates the minimum value of the target object according to the formula tan (θ ₁ ')=sqrt ((255^2-z ₁ '^2)/z ₁ '^2) and L'=h×tan (θ ₁ '). The distance L' between the point and the measuring device 10 . Likewise, the camera unit 12 performs a second shooting and focusing on the highest point of the target object, so as to obtain the second point to be measured. At this time, the G-sensor unit 11 obtains a second return value z ₂ ′ according to the determined second point to be measured. The processor 13 calculates according to the formula tan (θ ₂ ')=sqrt ((255^2-z ₂ '^2)/z ₂ '^2) and H=h+L'/tan (θ ₂ '-90°) Calculate the distance H between the first point to be measured and the second point to be measured, that is, the height of the target object.

Referring to Fig. 5, it is a flow chart of the method for measuring the target distance for the present invention, the method comprising:

In step S50, the user judges whether the actual height value of the measuring device 10 is consistent with the reference value h through the height reference value h of the measuring device 10 prestored in the measuring device 10, and if so, proceeds to step S51, otherwise, proceeds to step S50. S54.

In this embodiment, the reference value h is the distance between the measuring device 10 and the horizontal plane when the user uses the measuring device 10 .

Step S51 , the processor 13 activates the camera unit 12 to photograph and focus the target, and the user adjusts the posture of the measuring device 10 to obtain a focus point, thereby determining a point to be measured.

Step S52 , the G-sensor unit 11 generates a return value z according to the flip angle of the measuring device 10 .

When the camera unit 12 is shooting the target, it is actually a process of adjusting the posture of the measuring device 10 from the vertical direction to the horizontal direction, and the return value z varies within the range of 0-±255. When the camera unit 12 focuses on a target and determines a focus point, that is, the point to be measured, the G-sensor unit 11 obtains a return value z correspondingly according to the flip angle of the measuring device 10 .

Step S53, the processor 13 calculates the distance L between the measuring device 10 and the target according to the return value z determined by the G-sensor unit 11 and the first formula and the second formula.

In this embodiment, the first formula is tan(θ)=sqrt((255^2−z^2)/z^2), and the second formula is L=h×tan(θ).

In step S54, the user resets the reference value h through the measuring device 10, and then returns to step S50.

Please refer to Fig. 6, it is the flow chart of the method for speed measurement of the present invention, and this method comprises:

In step S60, the user judges whether the actual height value of the measuring device 10 is consistent with the reference value h through the height reference value h of the measuring device 10 prestored in the measuring device 10, and if so, proceeds to step S601, otherwise, proceeds to step S601. S68.

In this embodiment, the reference value h is the distance between the measuring device 10 and the horizontal plane when the user uses the measuring device 10 .

In step S61, the processor 13 activates the camera unit 12 for the first shooting and focusing of the target, and the user adjusts the posture of the measuring device 10 so that the camera unit 12 determines the first point to be measured at the first time _t1 , the The processor 13 records this first time t ₁ .

Step S62 , the G-sensor unit 11 generates a first return value z ₁ according to the flip angle of the measuring device 10 .

Step S63, the processor 13 calculates the distance L ₁ between the measuring device 10 and the target at the first time t ₁ according to the first return value z ₁ obtained by the G-sensor unit 11 and the first formula and the second formula.

In this embodiment, the first formula is tan(θ ₁ )=sqrt((255^2-z ₁ ^2)/z ₁ ^2), and the second formula is L ₁ =h×tan(θ ₁ ).

In step S64, the user adjusts the posture of the measuring device 10 again so that the camera unit 12 obtains a second point to be measured at a second time t ₂ , and the processor 13 records the second time t ₂ .

Step S65 , the G-sensor unit 11 generates a second return value z ₂ according to the flip angle of the measuring device 10 .

Step S66, the processor 13 calculates the distance L ₂ between the measuring device 10 and the target at a second time t ₂ according to the second returned value z ₂ determined by the G-sensor unit 11 and the first formula and the second formula.

In step S67, the processor 13 calculates the distance between the first time t ₁ and the second time t 2 according to the recorded first time t ₁ , the second time t ₂ , the calculated first distance L ₁ and the second distance L ₂ , and the third formula. During the course of time _t2 , the measuring device 10 moves with an average velocity v.

In this embodiment, the third formula is v=(L ₂ −L ₁ )/(t ₂ −t ₁ ).

In step S68, the user resets the reference value h through the measuring device 10, and then returns to step S60.

Please refer to Fig. 7, the flow chart of the method for measuring the height of the target object for the present invention, the method includes:

In step S70, the user judges whether the current actual height value of the measuring device 10 is consistent with the reference value h through the height reference value h of the measuring device 10 prestored in the measuring device 10, and if so, proceeds to step S71, otherwise, proceeds to step S70. S77.

In this embodiment, the reference value h is the distance between the measuring device 10 and the horizontal plane when the user uses the measuring device 10 .

In step S71, the processor 13 activates the camera unit 12, and the user adjusts the posture of the measuring device 10, so that the camera unit 12 shoots and focuses on the lowest point of the target object to obtain the first point to be measured.

Step S72, the G-sensor unit 11 generates a first return value z ₁ ′ according to the flip angle of the measuring device 10 .

Step S73, the processor 13 calculates the distance L ₁ between the measuring device 10 and the target at the first time t ₁ according to the first return value z ₁ ′ obtained by the G-sensor unit 11 and the first formula and the second formula.

In step S74, the user adjusts the posture of the measuring device 10 again, and the camera unit 12 shoots and focuses on the highest point of the target object to obtain the second point to be measured.

Step S75, the G-sensor unit 11 generates a second return value z ₂ ′ according to the flip angle of the measuring device 10 .

Step S76, the processor 13 calculates the height H of the target object according to the second returned value z ₂ ′ determined by the G-sensor unit 11, the reference value h, and the first formula and the third formula.

In this embodiment, the third formula is H=h+s′/tan(θ ₂ ′−90°).

In step S77, the user resets the reference value h through the measuring device 10, and then returns to step S70.

Using the above-mentioned measuring device and measuring method, the camera unit set in the measuring device focuses on the target object one or more times to obtain the point to be measured, and the G-sensor unit outputs a corresponding output according to the point to be measured obtained by focusing the camera unit. The return value, the processor calculates the distance, height and moving average speed of the target object in a period of time according to the return value and the reference value prestored in the measuring device, thereby solving the problem that the measuring device in the prior art cannot use GPS A technical problem of short, precise measurements.

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (9)

1. A measurement device, comprising a processor, characterized in that, the measurement device also includes: a camera unit configured to photograph and acquire an image including at least one target when the user adjusts the measuring device; and The G-sensor unit is configured to generate at least one return value z according to the flip angle of the measurement device when the camera unit acquires an image comprising at least one target, wherein the return value z is the measurement device at a The component in the Z-axis direction of the coordinate axis; The processor pre-stores a height reference value, and the processor is used to calculate the distance between the measuring device and the height reference value using a first formula and a second formula according to the return value z generated by the G-sensor unit and the height reference value. the distance to at least one target; The first formula is tan(θ)=sqrt((255^2-z^2)/z^2), and the second formula is L=h×tan(θ), where θ is the measurement The angle between the line between the device and the target and the vertical direction, h is the height reference value pre-stored in the processor, and L is the distance from the measuring device to the target. 2. The measuring device according to claim 1, wherein the quantity of the at least one target is two, comprising the image of the first target acquired by the camera unit at the first time and the image of the first target acquired at the second time. For the image of the second object, the G-sensor unit correspondingly generates a first return value and a second return value when the camera unit acquires the image of the first object and the image of the second object. 3. The measuring device according to claim 2, wherein the processor is also used to store the first time and the second time, and use the The first formula and the second formula calculate the first distance from the measuring device to the first target, and the measurement is also calculated by using the first formula and the second formula according to the second return value and the reference value The second distance from the device to the second target, and according to the first time, the second time, the first distance and the second distance, calculate the measurement device from the first time to the second time by using a third formula The average speed of the process; The third formula is v=(L2-L1)/(t2-t1), wherein, t1 is the first time, t2 is the second time, L1 is the first distance, L2 is the second distance, and v is the average speed . 4. The measuring device according to claim 2, characterized in that, the processor uses the first formula and the second formula to calculate the distance between the measuring device and the height reference value according to the first return value and the height reference value. The distance between the first target and the distance between the measuring device and the first target, the second return value and the reference value are calculated by using the first formula and a fourth formula to calculate the distance between the first target and the first target. the distance between the above-mentioned second objects; The fourth formula is H=h+L/tan(θ'-90°), where θ' is calculated by the processor according to the second return value and the first formula and the measurement device and The angle between the line between the targets and the vertical direction, H is the distance between the first target and the second target. 5. The measuring device according to claim 4, wherein the image of the first target is the lowest point image of a target object, and the image of the second target is the highest point image of the target object, so The distance between the first target and the second target is the height of the target object. 6. A measuring method, said measuring method being applied to a measuring device, is characterized in that said measuring method comprises: Adjusting the posture of the measuring device to capture and acquire an image of a target at the first time; A return value is correspondingly generated according to the flip angle of the measuring device when the image of the target is acquired, wherein the return value is a component of the measuring device in the direction of the coordinate axis Z; calculating the distance between the measuring device and the target according to the return value and a pre-stored height reference value, and using a first formula and a second formula; The first formula is tan(θ)=sqrt((255^2-z^2)/z^2), and the second formula is L=h×tan(θ), where z is the generated , θ is the angle between the line between the measuring device and the target and the vertical direction, h is the height reference value pre-stored by the measuring device, and L is the distance from the measuring device to the target distance. 7. The measuring method applied to a measuring device as claimed in claim 6, further comprising: Adjusting the attitude of the measuring device to shoot and acquire an image of another target at a second time; Generate another return value correspondingly according to the flip angle of the measuring device when the image of the other target is acquired; calculating another distance between the measuring device and the other target according to the another return value and the height reference value, and using a first formula and a second formula; and According to the first time, the second time and the calculated distance and the other distance, the average speed of the measuring device during the period from the first time to the second time is calculated using a third formula ; The third formula is v=(L2-L1)/(t2-t1), wherein, t1 is the first time, t2 is the second time, L1 is the calculated distance, and L2 is the calculated distance. Another distance out, v is the average speed. 8. The measuring method applied to a measuring device as claimed in claim 6, further comprising: Adjusting the posture of the measuring device at a second time to photograph and obtain an image of another target; Correspondingly generate another return value according to the angle at which the measuring device flips when the image of the other target is acquired; calculating the distance between the target and the other target by using the first formula and the fourth formula according to the other return value, the height reference value, and the calculated distance; The fourth formula is H=h+L/tan(θ'-90°), where θ' is the distance between the measuring device and the target calculated according to the other return value and the first formula. The angle between the line between and the vertical direction, H is the distance between the target and the other target. 9. The measuring method applied to a measuring device as claimed in claim 8, wherein the image of the target is the lowest point image of a target object, and the image of the other target is the highest point of the target object. point image, the distance between the target and the other target is the height of the target object.