TWI489091B - Method of detecting infrared intensity - Google Patents

Description

Method of detecting infrared intensity

The invention relates to a method for detecting light intensity, in particular to a method for detecting infrared intensity.

Referring to FIG. 1, a conventional method for detecting infrared intensity is to operate a network camera (IP CAM) 1 to be tested by one tester A, and another tester B to stand with a network camera (IP CAM) 1 A fixed distance, for example, 10 meters away, and an infrared intensity measuring instrument 2 for measuring the infrared intensity. After the tester B station locates, the infrared intensity measuring instrument 2 is turned on, and the tester A turns the network camera (IP CAM) 1 toward the tester B, and turns on the infrared light source 10 of the network camera (IP CAM) 1, so as to oppose the infrared intensity. The measuring instrument 2 emits an infrared light, and the tester B records an intensity value of the infrared light measured by the infrared intensity measuring instrument 2.

However, the conventional infrared intensity measuring instrument 2 is not only expensive but can only be listed as a consumable. It usually needs to be replaced after two years of use, so it is necessary for companies or users who need to detect infrared intensity for a long time. Undoubtedly a burden.

Therefore, the object of the present invention is to provide a detection infrared The method of line strength, which can replace the conventional infrared intensity measuring instrument, and saves the cost of measuring infrared rays.

Thus, the present invention provides a method for detecting infrared intensity, Detecting the intensity of an infrared light emitted by an infrared emitting device, and comprising: (A) providing a camera comprising a light sensing module and a digital signal processor electrically coupled to the light sensing module (B) placing the camera and the infrared emitting device side by side in a dark room so that the two are oriented at the same angle of view to a fixed background in the dark room and at a fixed distance from the fixed background; Turning on the light sensing module of the camera, and turning on an infrared light source of the infrared emitting device to emit the infrared light having a fixed power toward the fixed background, so that the infrared light reflected by the fixed background enters The light sensing module of the camera causes the light sensing module to sense an intensity signal of the infrared light; and (D) the digital signal processor of the camera converts the intensity signal into an intensity value and records.

Preferably, in step (C), a shutter of the camera is working The exposure is performed at a fixed exposure condition such that the amount of the infrared light entering the light sensing module is stable.

Preferably, the camera further comprises a light sensing mode disposed on the camera The infrared filter in front of the group can remove the unit, and in step (C), the infrared filter removable unit is set to be turned on to enable the infrared light to enter the light sensing module.

Preferably, the fixed background is a gray wall.

Preferably, the infrared emitting device is a webcam And in step (C), the network camera is switched to operate in a black/white mode, and the fixed power of the infrared light is the highest power.

Preferably, the camera further comprises an infrared light source, and in step (C), the infrared light source of the camera is turned off.

Preferably, the camera is a webcam, and the method further comprises the step (E): providing a computer electrically coupled to the webcam, and the computer can be loaded by executing one of the The application of the network camera is monitored, the intensity value recorded by the network camera is read, and a light intensity recording module stored therein is collected to collect the light intensity value information of all the infrared emitting devices tested.

Preferably, the monitoring network camera application further includes a light intensity comparison module, and in step (E), the light intensity comparison module reads all the measured values recorded by the light intensity recording module. The intensity values of the infrared emitting device are compared and compared to produce a light intensity comparison result.

The invention replaces the conventional infrared intensity measuring instrument by a camera capable of detecting infrared light, and by providing a full dark room, appropriately setting the position of the camera and the infrared emitting device to be tested in the darkroom and both A fixed background distance and viewing angle in the darkroom, and set the camera to have a fixed (optimal) exposure condition, turn off the camera's infrared source and infrared filter function (if any), then let the camera emit infrared light The device performs intensity detection of infrared light to achieve the effect and purpose of detecting infrared intensity of the present invention.

3‧‧‧ camera

4‧‧‧Infrared emitting device

5‧‧‧ Darkroom

6‧‧‧ computer

31‧‧‧Light sensing module

32‧‧‧Digital Signal Processor

41‧‧‧Infrared source

51‧‧‧Fixed background

61‧‧‧Light intensity recording module

62‧‧‧Light intensity comparison module

S1~S3‧‧‧ steps

Other features and effects of the present invention will be described with reference to the drawings. It is clearly shown in the embodiment, wherein: FIG. 1 shows a schematic diagram of measuring the intensity of infrared light emitted by a network camera using a conventional infrared intensity measuring instrument; FIG. 2 is a preferred embodiment of the method for detecting infrared intensity of the present invention. Schematic diagram of the test environment; and FIG. 3 is a main flow chart of the method for detecting infrared intensity in this embodiment.

Referring to FIG. 2, a preferred embodiment of the method for detecting infrared intensity of the present invention uses a camera 3 to detect the intensity of an infrared light emitted by an infrared emitting device 4, wherein the camera 3 includes a light sensing device. The module 31 is, for example, a conventional CCD or CMOS sensor, and a digital signal processor (DSP) 32 electrically coupled to the light sensing module 31.

The detection process of this embodiment is as shown in FIG. 3. First, step S1 is performed to prepare a darkroom 5 capable of providing an all-black (no light) environment, and the camera 3 is placed side by side with the infrared emitting device 4 to be tested. Within the dark room 5, and with the same viewing angle towards a fixed background 51 in the dark room 5, such as a gray wall or a simple scene, and a fixed distance from the fixed background 51, for example 10 meters.

Next, step S2 is executed to turn on the light sensing module 31 of the camera 3, and turn on an infrared light source 41 of the infrared emitting device 4, such as an infrared light emitting diode, to emit infrared light having a fixed power toward the fixed background 51. The infrared light reflected by the fixed background 51 enters the light sensing module 31 of the camera 3, and the light sensing module 31 senses an intensity signal of the infrared light.

Then, as in step S3, the digital signal processor of the camera 3 32 receives the intensity signal from the light sensing module 31, and converts the intensity signal into an intensity value and records it in a register or memory (not shown) of the camera 3.

And preferably, in step S2, a shutter of the camera 3 (not shown) is set to operate at a fixed exposure condition such that the amount of infrared light entering the light sensing module 31 is stable, i.e., there is no overexposure or underexposure. Moreover, if the camera 3 used in this embodiment includes an IR CUT filter Removable (ICR, not shown) disposed in front of the light sensing module 31, the infrared filter can be moved. When the unit is turned off, it blocks infrared light, so that infrared light cannot enter the light sensing module 31. Therefore, in step S2, the infrared filter removing unit of the camera 3 needs to be set to be turned on so that the infrared light can enter the light sensing module 31.

Furthermore, if the camera 3 further includes an infrared light source (not shown) In order to prevent the detection result from being disturbed, the infrared light source of the camera 3 is turned off in step S2.

In addition, in this embodiment, the infrared emitting device to be tested 4 is a webcam (IP CAM), and preferably, in step S2, the webcam to be tested is switched to work in a black/white mode, and the infrared light emitted by it is set. The fixed power is the highest power, but not limited to this. That is to say, the network camera to be tested may also not switch to the black/white mode, as long as it determines that the infrared light emitted by it is the highest power (the light intensity reaches the maximum). And the invention is not limited to detecting a network camera (IP) The infrared light emitted by CAM can also be used to detect other infrared emitting devices 4 that emit infrared light (i.e., have an infrared light source or an infrared light emitting diode).

In addition, the camera 3 of the embodiment adopts a conventional one. A network camera, as shown in FIG. 2, is electrically coupled to a computer 6 (such as a desktop computer or a notebook computer, etc.), for example, to a computer 6 or to a wireless local area network (not shown). ) is connected to the computer 6 and the computer 6 can read one or more of the measured infrared emitting devices recorded by the camera 3 by executing an existing monitoring network camera application, such as Tera Term. The intensity value is stored in a light intensity recording module 61 therein, thereby collecting the light intensity value information of all the infrared emitting devices 4 to be tested. Moreover, the application of the monitoring network camera may further include a light intensity comparison module 62 capable of reading the light intensity values of all the measured infrared emitting devices 4 recorded by the light intensity recording module 61, and Compare to produce a light intensity comparison result and display it on the screen of the computer 6 or store it for the tester to perform subsequent analysis applications or as a comparison and reference basis for developing infrared emission devices, such as new models of network cameras. .

In summary, the above embodiment can detect infrared light by The camera 3 replaces the conventional infrared intensity measuring instrument, and by providing a full dark room 5, appropriately sets the position of the camera 3 and the infrared emitting device 4 to be tested in the dark room 5 and both A distance between 5 and a fixed background 51, and setting the camera 3 to have a fixed (optimal) exposure condition, turning off the infrared light source of the camera 3, and infrared After the line filtering function (if any), the camera 3 is further inspected for the intensity of the infrared light by the infrared emitting device 4, thereby achieving the effect and purpose of detecting the infrared intensity. Moreover, since the above embodiments all use the same camera 3 for infrared intensity detection, the test environment can be standardized, simplified, and the test flow can be simplified and the test results can be quickly obtained, and the efficacy and purpose of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

3‧‧‧ camera

4‧‧‧Infrared emitting device

5‧‧‧ Darkroom

6‧‧‧ computer

31‧‧‧Light sensing module

32‧‧‧Digital Signal Processor

41‧‧‧Infrared source

51‧‧‧Fixed background

61‧‧‧Light intensity recording module

62‧‧‧Light intensity comparison module

Claims (7)

A method for detecting infrared intensity for detecting an intensity of an infrared light emitted by an infrared emitting device, and comprising: (A) providing a camera comprising a light sensing module and a light sensing module a group of electrically coupled digital signal processors; (B) the camera and the infrared emitting device are arranged side by side in a dark room, so that the two are oriented at the same angle of view to a fixed background in the dark room, and The fixed background is separated by a fixed distance; (C) the light sensing module of the camera is turned on, and an infrared light source of the infrared emitting device is turned on, so that the infrared light having a fixed power is emitted toward the fixed background, so as to be The infrared light reflected by the fixed background enters the light sensing module of the camera, so that the light sensing module senses an intensity signal of the infrared light, wherein a shutter of the camera is operated at a fixed exposure condition So that the amount of the infrared light entering the light sensing module is stable; and (D) the digital signal processor of the camera converts the intensity signal into an intensity value and records. The method for detecting infrared intensity according to claim 1, wherein the camera further comprises an infrared filter removable unit disposed in front of the light sensing module, and in step (C), the infrared filter The removable unit is set to be turned on to enable the infrared light to enter the light sensing module. The method of detecting infrared intensity according to claim 1, wherein the fixed background is a gray wall. The method for detecting infrared intensity according to claim 1, wherein the infrared emitting device is a network camera, and in step (C), the network camera is switched to operate in a black/white mode, and The fixed power of the infrared light is the highest power. The method of detecting infrared intensity according to any one of claims 1 to 4, wherein the camera further comprises an infrared light source, and in the step (C), the infrared light source of the camera is turned off. The method for detecting infrared intensity according to claim 5, wherein the camera is a webcam, and the method further comprises the step (E): providing a computer electrically coupled to the network camera, and The computer can read the intensity value recorded by the network camera by executing an application of the monitoring network camera loaded therein, and store a light intensity recording module therein to collect all the tested The light intensity value information of the infrared emitting device. The method for detecting infrared intensity according to claim 6, wherein the application of the monitoring network camera further comprises a light intensity comparison module, and in step (E), the light intensity comparison module reads the The intensity values of all of the infrared emitting devices tested are recorded by the light intensity recording module and compared to produce a light intensity comparison result.