LED lamp detection device and method

Abstract

The invention relates to an LED lamp detection device and method, and belongs to the technical field of LED lamp detection. The light intensity of a to-be-detected LED traffic signal lamp is monitored through an arranged sensing assembly, and the environment light of the to-be-detected LED lamp is detected through an environment detection assembly; the control assembly cleans the light intensity data fed back by the induction assembly according to the environment light intensity data to generate actual light intensity data, and the control assembly judges whether the LED traffic light to be detected is attenuated or not according to comparison of the actual light intensity data and a light intensity threshold value, so that whether illumination of the LED traffic light to be detected is sufficient or not is achieved, and the detection accuracy is improved. Therefore, the illumination intensity of the traffic light can be monitored.

Description

Technical Field

[0001] The present invention belongs to the technical field of LED lamp detection, and in particular relates to an LED lamp detection device and method. Background Art

[0002] At present, as the performance of LED lamps is getting better and better, the life of smart LED lamps is very long. The service life of smart LED lamps given by LED light source manufacturers can reach more than 100,000 hours under appropriate voltage peak and current. In fact, the service life of smart LED lamps will depend on external environmental factors such as heat dissipation materials, aluminum substrate plates, driving power supply, power factor, product structure, etc., which also causes the differentiation of the service life of smart LED lamps on the market. According to the inspection standards of LED lighting manufacturers, the lumen maintenance rate L70 for indoor lighting is required to be ≥25,000 hours, and the lumen maintenance rate L70 for outdoor and commercial lighting is required to be ≥35,000 hours. When the lumen maintenance rate of indoor lighting reaches L90, obvious light decay will occur and it is irreversible. LM-80-15 defines L90 as the failure standard, but the service life of LED is only given in theory. The actual service life caused by the actual use environment of LED is often different from the ideal service life, which makes it difficult for consumers to understand the actual service life of the LED lamps they use. Therefore, a series of troubles and even safety hazards often occur, especially when LED lamps are used to indicate indicator lights in certain scenarios, such as traffic lights. Traffic lights are signal lights that direct traffic operations. They are generally composed of red, green, and yellow lights. Red lights indicate no passage, green lights indicate passage is allowed, and yellow lights indicate warnings. Once these LED lights that require sufficient light decay, safety hazards will occur, and maintenance personnel cannot detect the brightness of traffic lights in real time and cannot discover safety hazards in time. Recently, traffic lights have begun to use light-emitting LED components, which have the following characteristics: LED light sources have multiple light-emitting components. Compared with traditional incandescent lamps that emit light at a single point, LED light sources have several or even dozens of LED components. Moreover, since LED components have their own light decay characteristics, in the case of overheating or other influencing factors, the LED's luminous ability will drop significantly, and the process is irreversible, which will affect the judgment to a certain extent.

[0003] Therefore, a technology is needed to monitor the light attenuation of LED traffic lights in real time and provide feedback to maintenance personnel when safety hazards occur. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides an LED light detection device and method to solve the problem of light attenuation of LED traffic lights in real time monitoring.

[0005] The object of the present invention can be achieved by the following technical solution: an LED lamp detection device, comprising a control component and a detection component and a sensing component respectively connected to the control component;

[0006] The control component instructs the sensing component to detect the light intensity of the LED lamp to be detected within a preset sensing time, and the sensing component feeds back the light intensity data to the control component;

[0007] A light intensity threshold is preset in the control component;

[0008] It also includes an environment detection component, which is electrically connected to the control component and controlled by it to detect the ambient light intensity and feed it back to the control component, and the control component cleans the light intensity data fed back by the sensing component according to the ambient light intensity data to generate actual light intensity data, and the control component compares and judges the actual light intensity data with the light intensity threshold;

[0009] When the control component determines that the actual light intensity data is less than the light intensity threshold, the control component determines that light attenuation occurs in the LED lamp to be detected.

[0010] Preferably, it also includes a current detection component, which is electrically connected to and controlled by the control component to detect the working current of the LED lamp to be detected and feed it back to the control component. The control component is preset with a current interval threshold. For the LED lamp to be detected whose working current does not fall within the current interval threshold, the control component shortens the sensing time of the sensing component to half of the original time.

[0011] Preferably, it also includes a terminal, the terminal is communicatively connected to the control component, and the control component sends the detection result to the terminal.

[0012] Preferably, it also includes a positioning component, which is respectively located in the LED lamps, and the positioning component is arranged on a detection component on the corresponding LED lamp, and the control component sends the location of the failed LED lamp to the terminal.

[0013] Preferably, a counting module and a storage module are provided in the control component, the counting module is used to calculate the power-on time of the LED lamp to be detected, the control component is preset with a power-on time threshold, the control component uses the power-on time threshold to monitor the power-on time of the LED lamp to be detected, the counting module stores the accumulated power-on time in the storage module, the storage module is also used to store data uploaded by the sensing component and the detection component, and the storage module has a read and write function.

[0014] Preferably, the control component adjusts the power-on time threshold according to the operating current and the actual light intensity.

[0015] Preferably, the control component also includes a monitoring module of the detection device itself, and the monitoring module is used to monitor the operating status of the internal circuit of the control component. The monitoring module is connected to the terminal and transmits an alarm instruction to the terminal when a failure occurs in the control component. The communication between the monitoring module and the terminal is an independent communication channel.

[0016] A method for detecting an LED lamp comprises the following steps:

[0017] Step 1: The control component receives data fed back by the sensing component and the environment detection component;

[0018] Step 2: The control component generates actual light intensity data, and compares the actual light intensity data with the light intensity threshold. If the light intensity is greater than the light intensity threshold, the control component determines that the state of the LED light to be detected is normal, and the cycle returns to the initial state, otherwise it goes to step 3;

[0019] Step 3: The control component retrieves the power-on time of the LED lamp to be detected, and compares the power-on time with the power-on time threshold to determine:

[0020] If the power-on time is equal to the power-on time threshold, the control component determines that the LED lamp to be detected needs to be replaced;

[0021] Step 4: The control component controls the detection component to detect the working current of the LED lamp to be detected. The control component compares and judges the working current fed back by the detection component with the preset current interval threshold:

[0022] If the operating current is not within the current interval threshold, the control component adjusts the sensing time of the sensing element to half of the original time;

[0023] Repeat steps 1-4.

[0024] Preferably, after returning to step 1, the control component deletes the light intensity data of the LED lamp to be detected that is transmitted from the sensing component to the control component and stored in the storage module in step 1.

[0025] The beneficial effects of the present invention are:

[0026] The working current of the LED traffic light is detected by the set current detection component, and compared with the current interval threshold preset in the control component. When the working current is not within the current interval threshold, the control component controls the sensing element to shorten the sensing time of the LED traffic light to half of the original sensing time, thereby achieving accurate monitoring.

[0027] By monitoring the power-on time of the LED traffic light to be detected, comparing with the preset power-on time threshold and detection time threshold, and when the power-on time of the LED traffic light to be detected is greater than the detection time threshold, the sensing time of the sensing element is adjusted again. Thus, the light intensity of the LED traffic light to be detected can be detected according to various situations, and its light intensity can be monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0029] Figure 1 FIG. 1 is a block diagram of the control components of the present invention. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] See also Figure 1 The present embodiment provides an LED lamp detection device, including a control component and a detection component and a sensing component respectively connected to the control component. The sensing component detects the light intensity data of the LED lamp to be detected and feeds it back to the control component. The light intensity data Ψ refers to the luminous flux emitted within a unit solid angle, which reflects the intensity of the LED light. Light intensity is an important parameter for measuring LED performance. It indicates the light-emitting ability of the LED in a specific direction. Therefore, by detecting the light intensity of the LED lamp, the light-emitting condition of the LED lamp can be known. The sensing component for sensing the light intensity here can adopt a light sensor. The light sensor generally refers to a device that can sensitively sense light energy from ultraviolet light to infrared light and convert the light energy into an electrical signal. The type of light sensor here is not limited, but it only needs to meet the requirements that the installation of the sensing component does not affect the light transmittance of the LED lamp and can reflect the light intensity of the corresponding LED lamp to the greatest extent. It only needs to meet the requirements that the sensing component of the present invention detects the light intensity of the LED to be detected.

[0032] When the sensing element detects the light intensity of the LED lamp to be detected, it will inevitably be affected by the light in the environment, and the light intensity in the environment is also uncertain, so the light intensity data sensed by the sensing element needs to be processed so that it can correctly reflect the light intensity of the LED lamp. The light intensity threshold is the light intensity of the LED lamp to be detected when it is normally lit, which is generally set when the LED lamp leaves the factory. The test of the light intensity D of the normal light emission of the LED lamp usually needs to be tested in a relatively dark or low-light environment to ensure the accuracy and reliability of the test and avoid interference of external light sources on the measurement results.

[0033] Therefore, it also includes an environment detection component, which is electrically connected to the control component and controlled by it to detect the ambient light intensity and feed it back to the control component. The control component cleans the light intensity data fed back by the sensing component according to the ambient light intensity data, generates actual light intensity data, and the control component compares and judges the actual light intensity data with the light intensity threshold;

[0034] The control component determines that the actual light intensity data is less than the light intensity threshold D P When the LED lamp to be detected is attenuated, the control component determines that the LED lamp to be detected has light attenuation.

[0035] The control component cleans the light intensity data fed back by the sensing component according to the ambient light intensity data by filtering the ambient light intensity data and the LED light intensity data to remove noise and abnormal values, and subtracting the ambient light intensity data from the LED light intensity data uploaded by the sensing component.

[0036] That is, no matter what light environment the LED lamp to be detected is in, the light intensity threshold used by the control component to judge can correctly reflect the correct light intensity of the LED lamp, thereby improving the accuracy of the detection result.

[0037] There are slight differences in the manufacturing process of LEDs, such as resistance values, the accuracy of electronic components, etc. These differences may cause the V / A (voltage-current) curve of the LED to be different, so even if the LED lamp is working in a constant voltage circuit, a slight shift in the V / A curve can cause a significant difference in current. When the operating current of an LED lamp exceeds its rated value, it will cause the carrier injection and ejection speed inside the LED lamp to be inconsistent, thereby generating additional heat and stress. This additional heat and stress will accelerate the aging process of the LED lamp, causing the light output to gradually decrease and aggravate light attenuation.

[0038] Therefore, in order to better realize the monitoring of the light attenuation of the LED lamp to be detected, in one embodiment, a current detection component is also included. The current detection component is electrically connected to the control component and is controlled by the control component to detect the working current of the LED lamp to be detected and feed it back to the control component. The control component is preset with a current interval threshold. The control component shortens the sensing time of the sensing element to half of the original for the LED lamp to be detected whose working current does not fall within the current interval threshold. The detection component detects the working current I of the LED lamp to be detected, and a current detector or a current monitoring circuit can be set on the working circuit of the LED lamp. The control component is pre-stored with a current interval threshold. The priority of the control component to control the sensing component is higher than the detection component. The priority of the control logic is that the control component determines that the LED lamp to be detected has a light attenuation phenomenon, that is, when the light intensity of the LED lamp uploaded by the sensing component is less than the light intensity threshold, the control component controls the current detector to perform the next step of detection on the LED lamp to be detected to determine whether the LED lamp is faulty. The control component compares and judges the power supply current I of the LED circuit fed back by the current detector with the pre-stored current interval threshold.

[0039] The current range threshold can be determined based on the information in the data sheet of the LED lamp and the relationship between the operating current and the light attenuation of the LED lamp can be evaluated through experiments. The data sheet here is a detailed data table of the product specifications and performance parameters of the LED lamp provided by the LED lamp manufacturer.

[0040] Of course, the control component can also evaluate the working state of the LED lamp and determine whether the LED lamp fails based on the working current data of the LED lamp to be detected uploaded by the detection element.

[0041] In order to facilitate maintenance personnel to understand the status information of the LED lamp in real time, in one embodiment, it also includes a user terminal, which communicates with the user terminal and the control component. The control component uploads the detection results to the terminal. The maintenance personnel can also input control instructions to the control component through the terminal and can view the status information of the LED lamp or subsequent maintenance information uploaded to the control component by the sensing component and the detection component in real time through the terminal. The user terminal can be a mobile phone terminal or a computer terminal of the maintenance personnel, which is connected to the control component in an Internet-connected state.

[0042] In theory, LEDs have a service life, that is, a certain power-on time. In theory, LEDs will enter a light decay period after a certain period of time. However, due to the complex and changeable environment in which LEDs are located, light decay may occur when the power-on time of the LED lamp has not reached its service life. In order to more comprehensively detect whether the LED lamp has a fault, in one embodiment, a counting module and a storage module are provided in the control component. The counting module is used to calculate the power-on time t of the LED lamp to be detected. Because the present application is adapted to the scenario in which the LED lamp is used as a traffic light, under normal circumstances, after the traffic light is turned on and put into use, it will not be extinguished unless a fault occurs and maintenance is required or the replacement standard is met. Therefore, the power-on time generally does not need to be initialized, and the power-on time of the LED lamp is directly calculated. That is, the restriction condition of the present application is that when the traffic light is turned on, the detection device is put into use accordingly. The LED lamp that is turned on for the second time can retrieve the relevant power-on time data in the storage module for recalculation.

[0043] The control component also stores a startup detection time threshold t P1 and the power-on time threshold t P2 The power-on time threshold is the usage time that has been specified when the corresponding LED lamp leaves the factory, that is, the theoretical life of the LED lamp, which is generally the industry standard. However, in the specific implementation process, due to the complex and changeable usage environment, there is often a difference between the theoretical usage time and the actual usage time, so it is necessary to adjust the theoretical usage time of the LED lamp to be tested to achieve a more targeted detection method.

[0044] Therefore, when determining the power-on time threshold preset in the control component, the power-on time threshold is the service life of the LED lamp to be detected provided by the manufacturer when the LED lamp is produced, and the detection time threshold is shortened accordingly according to the power-on time threshold, that is, according to the light decay curve of the LED lamp, it can be known that the use time of the LED lamp attenuation is accelerated, and the detection time threshold here is determined based on this time. However, these two time thresholds are at the theoretical level and need to be adjusted accordingly according to the environment of the LED lamp to be detected to facilitate the subsequent judgment of the control component.

[0045] The detection time threshold is the power-on time corresponding to the LED light intensity reaching a certain degree of attenuation under an ideal environment. After this time, the light attenuation of the LED lamp will accelerate. The control component adjusts the interval time of the sensing component to half of the original sensing interval time according to the power-on time t. The half of the sensing time here is further specified based on the sensing time adjusted by the aforementioned control component according to the working current of the LED lamp, that is, if the control component does not adjust the sensing time of the sensing element according to the working current, then the sensing time adjusted by the control component according to the power-on time of the LED lamp to be detected is half of the original sensing time; then correspondingly, if the control component adjusts the sensing time of the sensing element to half of the original according to the working current, then the sensing time adjusted by the control component according to the power-on time of the LED lamp to be detected is one quarter of the original sensing time.

[0046] When the power-on time of the LED light uploaded by the sensing device t≧t P2 When the LED lamp is detected, the control component sends a command to the terminal to replace the LED lamp, because the usage time of the LED lamp to be detected has reached its theoretical usage time. Even if there is no light attenuation, there is a great possibility of problems in the subsequent use process, so it needs to be replaced.

[0047] The counting module stores the accumulated power-on time t in the register module. The aforementioned power-on time t is the accumulated power-on time of the corresponding LED lamp up to that time. The register module is also used to store the data uploaded by the sensing component and the detection component. The register module has read and write functions, that is, data can be stored in the register and the data can also be called.

[0048] In order to increase the safety of the detection device of the present application, in one embodiment, the detection device also includes a monitoring module of the detection device itself, which is used to monitor the internal circuit of the control component in real time. The monitoring content includes power supply voltage, circuit current, etc., so as to transmit an alarm instruction to the terminal when a failure occurs in the control component of the present device, that is, a communication channel independent of the control component is established between the monitoring module and the terminal to ensure that when a failure occurs in the control component, the communication between the monitoring module and the terminal is not affected. The monitoring module inside the control component and the communication method between it and the terminal can adopt devices or components in the prior art to achieve the purpose of the present application.

[0049] In order to better monitor multiple traffic lights, it is necessary to position the monitored LED lights. In one embodiment, a positioning component is also included. Multiple positioning components are respectively installed on different LED lamp bases and connected to the corresponding detection devices on the LED lights. When the control component determines that the LED lamp is faulty through the data uploaded by the detection device, the specific location information of the LED traffic light can be known, so that the subsequent control component can send the location information of the faulty LED lamp to the terminal, which is convenient for the maintenance personnel. The positioning component here can use a locator or GPS, etc., to achieve the requirements of the present invention for the positioning component.

[0050] In one embodiment, a method for detecting an LED lamp is disclosed, comprising the following steps:

[0051] Step 1: The control component receives data fed back by the sensing component and the environment detection component;

[0052] Step 2: The control component generates actual light intensity data, and compares the actual light intensity data with the light intensity threshold. If the light intensity is greater than the light intensity threshold, the control component determines that the LED light state is normal and loops back to the initial state, otherwise it goes to step 3;

[0053] Step 3: The control component retrieves the power-on time of the LED lamp to be detected, and compares the power-on time with the power-on time threshold to determine:

[0054] If the power-on time is equal to the power-on time threshold, the control component determines that the LED lamp has reached the light decay period;

[0055] Step 4: The control component controls the detection component to detect the working current of the LED lamp to be detected. The control component compares and judges the working current fed back by the detection component with the preset current interval threshold:

[0056] If the operating current is not within the current interval threshold, the control component adjusts the sensing time of the sensing element to half of the original time;

[0057] Repeat steps 1-4.

[0058] Continuing from the above embodiment, in order to reduce the storage pressure of the register and facilitate data streamlining, in one embodiment, in the aforementioned step 1, when the control component determines that the light intensity value of the LED lamp to be detected uploaded by the corresponding sensing component is normal, the control component deletes the status information uploaded by the corresponding sensing component stored in the register. Because this information will not affect the subsequent judgment of the control component, it can be directly deleted to reduce the space occupied by the register.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A LED lamp detection device, characterized in that: It includes a control component and a detection component and a sensing component respectively connected to the control component; The control component instructs the sensing component to detect the light intensity of the LED lamp to be detected within a preset sensing time, and the sensing component feeds back the light intensity data to the control component; The control component is preset with a light intensity threshold; It also includes an environment detection component, which is electrically connected to the control component and controlled by it to detect the ambient light intensity and feed it back to the control component, and the control component cleans the light intensity data fed back by the sensing component according to the ambient light intensity data to generate actual light intensity data, and the control component compares and judges the actual light intensity data with the light intensity threshold; When the control component determines that the actual light intensity data is less than the light intensity threshold, the control component determines that light attenuation occurs in the LED lamp to be detected.

2. The LED lamp detection device according to claim 1, characterized in that: It also includes a current detection component, which is electrically connected to and controlled by the control component to detect the working current of the LED lamp to be detected and feed it back to the control component. The control component is preset with a current interval threshold. For the LED lamp to be detected whose working current does not fall within the current interval threshold, the control component shortens the sensing time of the sensing component to half of the original time.

3. The LED lamp detection device according to claim 1, characterized in that: It also includes a terminal, which is communicatively connected to the control component, and the control component sends the detection result to the terminal.

4. The LED lamp detection device according to claim 3, characterized in that: It also includes a positioning component, which is located in the LED lamps respectively. The positioning component is arranged on the detection component on the corresponding LED lamp, and the control component sends the location of the failed LED lamp to the terminal.

5. The LED lamp detection device according to claim 2, characterized in that: The control component is provided with a counting module and a storage module. The counting module is used to calculate the power-on time of the LED lamp to be detected. The control component is preset with a power-on time threshold. The control component uses the power-on time threshold to monitor the power-on time of the LED lamp to be detected. The counting module stores the accumulated power-on time in the storage module. The storage module is also used to store data uploaded by the sensing component and the detection component. The storage module has a read and write function.

6. The LED lamp detection device according to claim 5, characterized in that: The control component adjusts the power-on time threshold according to the operating current and the actual light intensity.

7. The LED lamp detection device according to claim 1, characterized in that: The control component also includes a monitoring module of the detection device itself, which is used to monitor the operating status of the internal circuit of the control component. The monitoring module is connected to the terminal and transmits an alarm instruction to the terminal when a failure occurs in the control component. The communication between the monitoring module and the terminal is an independent communication channel.

8. A method for detecting an LED lamp, using an LED lamp detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The control component receives data fed back by the sensing component and the environmental detection component; Step 2: The control component generates actual light intensity data, and compares the actual light intensity data with the light intensity threshold. If the light intensity is greater than the light intensity threshold, the control component determines that the state of the LED light to be detected is normal, and the cycle returns to the initial state, otherwise it goes to step 3; Step 3: The control component retrieves the power-on time of the LED lamp to be detected, and compares the power-on time with the power-on time threshold to determine: If the power-on time is equal to the power-on time threshold, the control component determines that the LED lamp to be detected needs to be replaced; Step 4: The control component controls the detection component to detect the working current of the LED lamp to be detected. The control component compares and judges the working current fed back by the detection component with the preset current interval threshold: If the operating current is not within the current interval threshold, the control component adjusts the sensing time of the sensing element to half of the original time; Repeat steps 1-4.

9. The LED lamp detection method according to claim 8, characterized in that: After returning to step 1, the control component deletes the light intensity data of the LED lamp to be detected that is transmitted from the sensing component to the control component and stored in the storage module in step 1.

Images