Flash lamp failure judgment method

Abstract

The present invention relates to the technical field of flashlights, and in particular to a method for determining a flashlight fault. The present invention detects the charging energy of an energy storage capacitor, performs indirect detection when the output flashlight is lit, and converts the actual energy consumed, detects the voltage change of the energy storage capacitor, calculates the energy actually charged into the energy storage capacitor, and then obtains the usage of the load, and detects the flashlight fault problem when the load is attenuated in addition to the open circuit and short circuit. The present invention is mainly used in occasions with instantaneous load output such as flashlights, and well solves the problems of power supply selection and fault determination in traditional designs, and relatively simply realizes the technical problems of power supply and fault detection, and also achieves good results in actual product use.

Description

Technical Field

[0001] The present invention relates to the technical field of flashlights, and in particular to a method for determining a flashlight failure. Background Art

[0002] As modern industrial production becomes increasingly developed, the design and use of high-power flash lamps are becoming more and more frequent. For example, in the aviation field, flashing obstacle lights are used on high-rise structures such as buildings and towers, where the instantaneous power can reach up to kilowatts.

[0003] With the increase in the number of uses and popularity, how to design a simple and optimized flash power supply becomes particularly important. If the power supply design is based on conventional power calculations, the selection can only be made based on the maximum instantaneous output power, but not based on the average output power.

[0004] According to the working principle of the flash lamp, it usually works for tens of milliseconds and is in a non-working state most of the time. The overall power is often measured to be only a few W or tens of W. If the power supply is selected according to the average power, it cannot meet the instantaneous high-power input requirements.

[0005] Another design issue with flashlights is the detection and judgment of their faults. Conventional open circuit and short circuit faults are easy to detect, but electrical faults caused by power attenuation are more difficult to detect and judge. Power attenuation usually means that the light-emitting components inside the flashlight have failed. The direct result is that the output light intensity cannot meet the original design requirements. According to the light intensity judgment requirements, the fault also needs to be repaired in time. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention discloses a flash lamp fault determination method, which is used to solve the current problems of power supply and fault detection of the flash lamp.

[0007] The present invention is achieved through the following technical solutions:

[0008] The present invention discloses a flashlight fault determination method, wherein the method uses a flashlight fault determination system to detect the charging energy of an energy storage capacitor, performs indirect detection when the output flashlight is lit, and converts the actual energy consumed, detects the voltage change of the energy storage capacitor, calculates the energy actually charged into the energy storage capacitor, and then obtains the use of the load, and detects the flashlight fault problem when the load is attenuated in addition to the open circuit and short circuit;

[0009] In the method, the energy stored in the capacitor is E = 0.5CU 2 , the charge energy inside the energy storage capacitor is calculated and designed to meet the energy output requirements of a specific duration, where C is the capacitance and U is the voltage;

[0010] In the method, the charging energy of the energy storage capacitor is detected, and when the output flash light is lit indirectly, the actual energy consumed is calculated. Following the principle of energy conservation, the energy consumed when the flash light is instantly lit is equal to the energy consumed by the energy storage capacitor, and is also equal to the energy charged to the energy storage capacitor by the low-power constant current power supply.

[0011] The system includes a microprocessor and a flashlight drive output module, wherein the microprocessor is connected to the flashlight drive output module, the flashlight drive output module is connected to an energy storage capacitor, the energy storage capacitor is connected to an EMC filter circuit via a constant current charging power supply, and the microprocessor integrates charging current detection, energy storage capacitor voltage detection and a system timer.

[0012] Furthermore, the method analyzes the flashing moment of the flash lamp, and then provides energy that meets the requirements, and does not provide the required energy during the non-lighting working state time.

[0013] Furthermore, the method uses a small power supply at the front end to charge the energy storage capacitor with constant current and limited voltage.

[0014] The beneficial effects of the present invention are:

[0015] The present invention is applied in occasions with instantaneous load output such as flash lamps, and effectively solves the problems of power supply selection and fault determination in traditional designs, and relatively simply realizes the technical problems of power supply and fault detection, and also achieves good results in actual product use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The invention is a circuit principle diagram of a flash lamp fault determination system. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1

[0020] This embodiment discloses Figure 1 A flashlight fault determination system is shown, and the determination system is used to implement the flashlight fault determination method. The system includes a microprocessor and a flashlight drive output module. The microprocessor is connected to the flashlight drive output module. The flashlight drive output module is connected to an energy storage capacitor. The energy storage capacitor is connected to an EMC filter circuit through a constant current charging power supply. The microprocessor integrates charging current detection, energy storage capacitor voltage detection and a system timer.

[0021] The microprocessor of this embodiment includes a memory storing execution instructions. When the microprocessor executes the execution instructions stored in the memory, the microprocessor executes the flash failure determination method.

[0022] The energy storage capacitor of this embodiment meets the requirement of charging the energy storage capacitor to reach a preset energy when the flash light is not on, and providing instantaneous high-power energy output when the flash light is working.

[0023] Example 2

[0024] With respect to the flash lamp fault determination system of embodiment 1, this embodiment discloses a flash lamp fault determination system and method, which are used to solve the current problems of flash lamp power supply and fault detection.

[0025] The method of this embodiment detects the charging energy of the energy storage capacitor, performs indirect detection when the output flash light is on, and converts the actual energy consumed, and detects the voltage change of the energy storage capacitor, calculates the actual energy charged into the energy storage capacitor, and then obtains the usage of the load, and detects the fault problem of the flash light when the load is attenuated in addition to open circuit and short circuit.

[0026] The method of this embodiment analyzes the flashing moment of the flash lamp and then provides energy that meets the requirements, and does not provide the required energy during the non-lighting working state time.

[0027] The method of this embodiment is based on the energy stored in the capacitor being E=0.5CU 2 , the charge energy inside the energy storage capacitor is calculated, and the design is based on this to meet the energy output requirements of a specific duration, where C is the capacitance and U is the voltage. A small power supply is used at the front end to charge the energy storage capacitor with constant current and limited voltage.

[0028] The method of this embodiment detects the charging energy of the energy storage capacitor, and performs indirect detection and output when the flash light is turned on, and converts the actual energy consumed. Following the principle of conservation of energy, the energy consumed when the flash light is instantly turned on is equal to the energy consumed by the energy storage capacitor, and is also equal to the energy charged to the energy storage capacitor by the low-power constant current power supply.

[0029] Example 3

[0030] Based on the working characteristics of the flash lamp, this embodiment proposes a new power supply design and fault detection and judgment idea, simplifies the difficulty of developing and designing the flash lamp, and can realize fault detection and judgment under power attenuation based on open circuit and short circuit faults, thereby further optimizing the traditional design scheme.

[0031] Before describing the design ideas of this embodiment, a brief description of the traditional flash design ideas is given. Since the flash is a flashing lamp, although the output light intensity flashes periodically, the general lighting duration is about tens of milliseconds, but the instantaneous output light intensity of the flashing is required to be as high as several thousand or even tens of thousands of candela (symbol: cd).

[0032] According to the principle of conservation of energy, the instantaneous output light intensity requires the conversion output of power with the same energy. Therefore, when choosing a power supply, you have to select the power according to the instantaneous power. The power supply selected according to this requirement will be larger in size due to its higher power, and it will not be easy to put it into the lamp body during installation. At the same time, the price is also very high, which often leads to many problems such as exceeding the design budget of the product.

[0033] In addition, traditional flash lamps can only detect open circuit and short circuit faults. It is difficult to detect power attenuation faults, or more peripheral detection circuits need to be added, which undoubtedly increases the cost and complexity of circuit design to a certain extent. At the same time, the complexity of the peripheral circuit will indirectly lead to the probability of failure.

[0034] How to design a power supply method that simplifies the peripheral circuit and meets the working characteristics of the flash is particularly important. The application method of this embodiment is specifically described below, as follows:

[0035] This embodiment carefully studies the flash characteristics of the flash lamp, and thinks independently from the traditional power supply selection thinking mode. It is analyzed that it is only necessary to provide energy that meets the design requirements at the moment of the flash, and there is no need to provide the required energy during the non-lighting working state. The first thing that comes to mind in this solution is the application idea of ​​energy storage capacitors, that is, the energy storage capacitors have fast energy storage and meet the characteristics of large instantaneous discharge current. Therefore, it is only necessary to charge the energy storage capacitor to reach the preset energy when the flash lamp is not lit, and provide instantaneous high-power energy output when the flash lamp is working.

[0036] Since the effective lighting time of the flashlight is only about tens of milliseconds, the energy stored in the capacitor is E = 0.5CU 2The calculated charge energy inside the energy storage capacitor is sufficient to meet the energy output of the duration to meet the design requirements. A small power supply is used at the front end to charge the energy storage capacitor with constant current and limited voltage. In this case, after actual measurement, the power of the small power supply at the front end only needs about 5% of the original power supply to meet the charging requirements, which is superior to traditional design ideas in terms of volume and cost.

[0037] For the fault detection and judgment solution of the flash, the design idea provided by this solution is to detect the charging energy of the energy storage capacitor, and perform indirect detection output when the flash is lit, and convert the actual energy consumed. Following the principle of conservation of energy, the energy consumed by the instantaneous lighting of the flash is equal to the energy consumed by the energy storage capacitor, that is, equal to the energy charged to the energy storage capacitor by the low-power constant current power supply.

[0038] Because the current charging the energy storage capacitor is known, the actual energy charged into the energy storage capacitor can be calculated by detecting the voltage change of the energy storage capacitor, which can indirectly calculate the load usage and detect faults such as open circuit and short circuit in the flash lamp and load attenuation.

[0039] In summary, the present invention is mainly used in occasions with instantaneous load output such as flash lamps, and it effectively solves the problems of power supply selection and fault judgment in traditional designs, and relatively simply realizes the two technical problems of power supply and fault detection, and also achieves good results in actual product use.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flash lamp failure determination method, characterized in that: The method uses a flashlight fault determination system to detect the charging energy of the energy storage capacitor, performs indirect detection when the output flashlight is lit, and converts the actual energy consumed, and detects the voltage change of the energy storage capacitor to calculate the energy actually charged into the energy storage capacitor, and then obtains the use of the load, and detects the flashlight fault problem when the load is attenuated in addition to the open circuit and short circuit; In the method, the energy stored in the capacitor is E = 0.5CU 2 , the charge energy inside the energy storage capacitor is calculated and designed to meet the energy output requirements of a specific duration, where C is the capacitance and U is the voltage; In the method, the charging energy of the energy storage capacitor is detected, and the actual energy consumed is calculated when the output flash light is lit indirectly. According to the principle of energy conservation, the energy consumed by the flash light when it is instantly lit is equal to the energy consumed by the energy storage capacitor, and is also equal to the energy charged to the energy storage capacitor by the low-power constant-current power supply. The system includes a microprocessor and a flashlight drive output module, wherein the microprocessor is connected to the flashlight drive output module, the flashlight drive output module is connected to an energy storage capacitor, the energy storage capacitor is connected to an EMC filter circuit via a constant current charging power supply, and the microprocessor integrates charging current detection, energy storage capacitor voltage detection and a system timer.

2. The flash lamp failure determination method according to claim 1, characterized in that: The method analyzes the flashing moment of the flash lamp, and then provides energy that meets the requirements, and does not provide the required energy during the non-lighting working state time.

3. The flash lamp failure determination method according to claim 1, characterized in that: The method adopts a small power supply at the front end to charge the energy storage capacitor with constant current and limited voltage.

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