Method for automatically detecting abnormal power supply and TV mainboard

Abstract

The invention discloses a method for automatically detecting power supply abnormity and a TV mainboard, and belongs to the technical field of mainboard system detection. A method for automatically detecting power supply abnormity comprises the following steps: step 1, a circuit is switched on through a power supply of a TV mainboard main body, and the power supply supplies power to a delay circuit breaker and a power supply inductor; 2, judging power supply abnormity through the main chip; 3, delaying power-off through a delay circuit breaker, and protecting the filter circuit; and 4, influencing the breaking time of the delay circuit breaker, generating deviation, and detecting power supply abnormity. The problems that an existing anomaly detection method is tedious in step, high in intelligent requirement, poor in single-phase power supply anomaly detection effect and affects long-term work are solved, time difference is collected through the timer, power supply anomaly is detected through the test module, two completely different detection modes are adopted, it is ensured that power supply anomaly can be accurately judged, and the detection efficiency is improved. The detection effect is good and the precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of mainboard system detection, and in particular to a method for automatically detecting power supply anomalies and a TV mainboard. Background Art

[0002] In the current smart TV technology, the abnormality detection of the motherboard system is crucial. The motherboard is the core of the entire smart TV operation, and any small abnormality may cause the entire system to fail. The existing power supply circuit cannot provide abnormality detection, and it is impossible to know whether the power supply circuit fails to enable successfully and cannot work because the external input enable signal is invalid.

[0003] A Chinese patent with announcement number CN116962673A discloses an abnormality detection method and system applied to a smart TV mainboard system. The patent can effectively improve the abnormality detection capability of the smart TV mainboard system, thereby enhancing its stability and reliability.

[0004] The abnormality detection method of the above patent has complicated steps in actual use, has high requirements for intelligence, and has poor detection effect on single-phase power supply abnormalities, which affects long-term work. Therefore, it does not meet the existing needs. We propose a method and TV motherboard with automatic detection of power supply abnormalities. Summary of the invention

[0005] The purpose of the present invention is to provide a method and a TV motherboard for automatically detecting power supply anomalies, which solves the problem that the anomaly detection method proposed in the above background technology has complicated steps in actual use, high requirements for intelligence, poor detection effect on single-phase power supply anomalies, and affects long-term work.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a method with automatic detection of power supply anomaly, implemented by a TV mainboard with automatic detection of power supply anomaly, a TV mainboard with automatic detection of power supply anomaly, comprising a TV mainboard body, a power supply, a power supply sensor and a test module, the power supply comprising a delay circuit breaker, the power supply sensor comprising a timer;

[0007] The TV mainboard body also includes a main chip, and the main chip is electrically connected to the power supply sensor through a filter circuit;

[0008] A method for automatically detecting power supply anomalies includes the following steps:

[0009] Step 1: Connect the circuit through the power supply of the TV main board body, and the power supply supplies power to the delay circuit breaker and the power supply sensor;

[0010] Step 2: The power supply sensor initially senses the power supply, sends the data to the main chip through the filter circuit, and the main chip determines the power supply abnormality;

[0011] Step 3: Power the delay circuit breaker through the power supply. When the power is turned off, the delay circuit breaker delays the power off and protects the filter circuit.

[0012] Step 4: When the power supply is normal, the delay time of the delay circuit breaker is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker is affected and a deviation occurs. The time difference is collected by the timer and the power supply abnormality is detected by the test module.

[0013] Preferably, in the step 2, the power supply sensor is composed of an array electrode, a wire, and a collection circuit board, and the array electrode is arranged in the area where the TV main board is located, and one end of the array electrode is connected to the p port of the collection circuit board with a wire in sequence, all the n ports of the collection circuit board are connected with jumper caps, and the negative pole of the power supply electrode is connected to the n port of the collection circuit board with a wire. During the collection process, the sampling frequency Hz is set during DC power supply, and data at each moment is collected each time, thereby performing inductive power supply.

[0014] Preferably, in step 2, the power supply sensor initially senses the power supply, sends the data to the main chip through the filter circuit, and the main chip determines the power supply abnormality, including:

[0015] The power supply sensor performs preliminary induction power supply on the power supply according to a preset induction cycle to obtain multiple sets of induction power supply data;

[0016] Each set of induction power supply data is scaled down by a filter circuit to obtain detection power supply data that is linearly related to the induction power supply data, and the power supply detection data is sent to the main chip;

[0017] The main chip obtains the curve characteristics and numerical characteristics of the power supply detection data, compares the curve characteristics with the standard curve characteristics of normal power supply, and obtains normal curve characteristics and abnormal curve characteristics;

[0018] Acquire a first numerical feature in the abnormal curve feature from the numerical feature, compare the first numerical feature with a standard numerical feature of normal power supply, and acquire a first curve feature that is not within a numerical range of the standard numerical feature, and a third curve feature that is within a numerical range of the standard numerical feature;

[0019] Acquire a second numerical feature in the normal curve feature from the numerical feature, compare the second numerical feature with a standard numerical feature of normal power supply, and acquire a second curve feature that is not within the numerical range of the standard numerical feature;

[0020] A first-level abnormality flag is configured for the inductive power supply data corresponding to the first curve feature, a second-level abnormality flag is configured for the inductive power supply data corresponding to the second curve feature, and a third-level abnormality flag is configured for the inductive power supply data corresponding to the third curve feature, to obtain a preliminary power supply abnormality judgment result.

[0021] Preferably, in step 4, when the power supply is normal, the delay time of the delay circuit breaker is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker is affected, resulting in deviation. The time difference is collected by a timer, and the power supply abnormality is detected by a test module, including:

[0022] The time value of the delay of the delay circuit breaker is collected by the timer, and the target time difference is determined according to the following formula based on the fixed time value of the delay of the delay circuit breaker and the transmission channel between the delay circuit breaker and the timer;

[0023]

[0024] Where ΔT represents the target time difference, T S Indicates the time value of the delay circuit breaker, T0 indicates the fixed time value of the delay circuit breaker, T c represents the transmission time between the delay circuit breaker and the timer in the transmission channel, n represents the number of transmission channels between the delay circuit breaker and the timer, and h i0 represents the distance between the current transmission channel and the other i-th transmission channel, and C represents the time constant;

[0025] The test module calculates the weighted difference between the target time difference and the preset deviation according to the following formula;

[0026] K=β*|ΔT-ΔT a |

[0027] Where K represents the weighted difference value, ΔT a represents the preset deviation, β represents the participation weight;

[0028] It is determined whether the weighted difference value is greater than a preset threshold value. If so, it is determined that the power supply is abnormal; otherwise, it is determined that the power supply is normal.

[0029] A TV mainboard with automatic detection of power supply anomalies comprises a TV mainboard body, a power supply, a power supply sensor and a test module, wherein the power supply comprises a delay circuit breaker, the power supply sensor comprises a timer, the TV mainboard body further comprises a main chip, and the main chip is electrically connected to the power supply sensor through a filter circuit.

[0030] Preferably, a high-definition card reader, a program memory, a switching switch, a decoder, a frame memory and a line-by-line processor are provided inside the TV main board body, and the high-definition card reader, program memory, switching switch, decoder, frame memory and line-by-line processor are electrically connected to the TV main board body through a pin circuit.

[0031] Preferably, a plurality of the power supply sensors are provided, the plurality of the power supply sensors are connected in series via an integrated circuit, and the timer is electrically connected to the power supply sensors.

[0032] Preferably, the test module comprises a processor unit, an input end of the processor unit is connected to an output end of the data comparison unit, and an output end of the processor unit is connected to an input end of a memory and a wireless transmission unit.

[0033] Preferably, the input end of the data comparison unit is connected to the output ends of the voltage acquisition unit and the time acquisition unit, and the voltage acquisition unit and the time acquisition unit are used to collect detection data of the power supply sensor and the timer.

[0034] Preferably, the output end of the power supply is respectively connected to the input end of the delay circuit breaker and the power supply sensor, the input end of the power supply sensor is connected to the input end of the filter circuit, and the output end of the filter circuit is connected to the input end of the main chip.

[0035] Preferably, the output end of the filter circuit is connected to the input end of the test module, the input end of the test module is connected to the output end of the timer, and the input end of the timer is connected to the input end of the delay circuit breaker.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The power supply anomaly detection method of the present invention connects the circuit through the power supply of the TV mainboard body, and the power supply supplies power to the delay circuit breaker and the power supply sensor. The power supply is initially sensed by the power supply sensor, and the data is sent to the main chip through the filter circuit. The power supply anomaly is judged by the main chip, and then the delay circuit breaker is set. When the power supply is normal, the delay time of the delay circuit breaker is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker is affected and a deviation occurs. The time difference is collected by the timer, and the power supply anomaly is detected by the test module. Two completely different detection methods are used and cooperate with each other to ensure that the power supply anomaly can be accurately judged, and the detection effect is good and the accuracy is high.

[0038] 2. The test module provided on the TV mainboard of the present invention performs measurement and judgment work through the test module, collects and records the circuit breaking time and voltage through the time acquisition unit and the voltage acquisition unit, and compares them, and sends them to the processor unit for judgment, thereby performing detection work, and sending the detection records and results to the memory and the wireless transmission unit, so as to facilitate subsequent maintenance and repair work, and supplying power to the delay circuit breaker through the power supply. When the power is turned off, the power is delayed by the delay circuit breaker, and the filter circuit is protected to increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a flow chart of the method of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the TV mainboard of the present invention;

[0041] Figure 3 This is a principle block diagram of the TV mainboard of the present invention;

[0042] Figure 4 It is a principle block diagram of the test module of the present invention.

[0043] In the figure: 1. TV main board body; 101. Filter circuit; 2. Power supply; 201. Delay circuit breaker; 3. Power supply sensor; 301. Integrated circuit; 302. Timer; 4. High-definition card reader; 5. Test module; 501. Processor unit; 502. Memory; 503. Wireless transmission unit; 504. Data comparison unit; 505. Voltage acquisition unit; 506. Time acquisition unit; 6. Main chip; 7. Program memory; 8. Switch; 9. Decoder; 10. Frame memory; 11. Line-by-line processor. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0045] In order to solve the problems that the existing abnormality detection methods are cumbersome in actual use, have high requirements for intelligence, have poor detection effects on single-phase power supply abnormalities, and affect long-term work, please refer to Figure 1 - Figure 4 , this embodiment provides the following technical solutions:

[0046] A method for automatically detecting power supply anomalies comprises the following steps:

[0047] Step 1: The circuit is connected through the power supply 2 of the TV main board body 1, and the power supply 2 supplies power to the delay circuit breaker 201 and the power supply sensor 3;

[0048] Step 2: The power supply sensor 3 initially senses the power supply, and sends the data to the main chip 6 through the filter circuit 101, and the main chip 6 determines that the power supply is abnormal;

[0049] Step 3: Power the delay circuit breaker 201 through the power supply 2. When the power supply 2 is turned off, the delay circuit breaker 201 delays power off and protects the filter circuit 101.

[0050] Step 4: When the power supply is normal, the delay time of the delay circuit breaker 201 is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker 201 is affected, resulting in deviation. The time difference is collected by the timer 302, and the power supply abnormality is detected by the test module 5. Two completely different detection methods are used and cooperate with each other to ensure that the power supply abnormality can be accurately judged, and the detection effect is good and the accuracy is high.

[0051] In addition, in step 2, the power supply sensor 3 is composed of an array electrode, a wire, and a collection circuit board, and the array electrode is arranged in the area where the TV main board body 1 is located, and the array electrode is connected to the p port of the collection circuit board with a wire in sequence, and all the n ports of the collection circuit board are connected with jumper caps, and the negative pole of the power supply electrode is connected to the n port of the collection circuit board with a wire. During the collection process, the sampling frequency is set to 100Hz during DC power supply, and 1600 data are collected at each moment each time, so as to perform inductive power supply, and the power supplied by the power supply 2 is fully sensed by the power supply sensor 3 to improve the detection effect.

[0052] In one embodiment, in step 2, the power supply sensor 3 initially senses the power supply, and sends the data to the main chip 6 through the filter circuit 101, and the main chip 6 determines the power supply abnormality, including:

[0053] The power supply sensor 3 performs preliminary induction power supply on the power supply 2 according to a preset induction cycle to obtain multiple sets of induction power supply data;

[0054] Each set of induction power supply data is scaled down by the filter circuit 101 to obtain detection power supply data that is linearly related to the induction power supply data, and the power supply detection data is sent to the main chip 6;

[0055] The main chip 6 obtains the curve characteristics and numerical characteristics of the power supply detection data, compares the curve characteristics with the standard curve characteristics of normal power supply, and obtains normal curve characteristics and abnormal curve characteristics;

[0056] Acquire a first numerical feature in the abnormal curve feature from the numerical feature, compare the first numerical feature with a standard numerical feature of normal power supply, and acquire a first curve feature that is not within a numerical range of the standard numerical feature, and a third curve feature that is within a numerical range of the standard numerical feature;

[0057] Acquire a second numerical feature in the normal curve feature from the numerical feature, compare the second numerical feature with a standard numerical feature of normal power supply, and acquire a second curve feature that is not within the numerical range of the standard numerical feature;

[0058] A first-level abnormality flag is configured for the inductive power supply data corresponding to the first curve feature, a second-level abnormality flag is configured for the inductive power supply data corresponding to the second curve feature, and a third-level abnormality flag is configured for the inductive power supply data corresponding to the third curve feature, to obtain a preliminary power supply abnormality judgment result.

[0059] In this embodiment, the inductive power supply data is mainly monitoring data of voltage value.

[0060] In this embodiment, each set of induction power supply data is scaled down by a filter circuit (101) to obtain detection power supply data that is linearly related to the induction power supply data, thereby obtaining a low voltage for easy processing.

[0061] In this embodiment, the standard curve features and the standard numerical features are designed and acquired in advance according to the actual scene conditions.

[0062] In this embodiment, the first level anomaly is greater than the second level anomaly which is greater than the third level anomaly.

[0063] The beneficial effects of the above design scheme are: by obtaining the curve characteristics and numerical characteristics of the power supply detection data, comparing the curve characteristics with the standard curve characteristics of normal power supply, obtaining normal curve characteristics and abnormal curve characteristics, obtaining the first numerical characteristics in the abnormal curve characteristics from the numerical characteristics, comparing the first numerical characteristics with the standard numerical characteristics of normal power supply, obtaining the first curve characteristics that are not within the numerical range of the standard numerical characteristics, and the third curve characteristics within the numerical range of the standard numerical characteristics; obtaining the second numerical characteristics in the normal curve characteristics from the numerical characteristics, comparing the second numerical characteristics with the standard numerical characteristics of normal power supply, obtaining the second curve characteristics that are not within the numerical range of the standard numerical characteristics, combining the two factors of data trend and numerical value to analyze and make a preliminary judgment on the power supply from the power supply sensor, and dividing the abnormal level, providing a comprehensive and accurate data basis for further abnormal judgment.

[0064] In one embodiment, in step 4, when the power supply is normal, the delay time of the delay circuit breaker 201 is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker 201 is affected, resulting in deviation. The time difference is collected by the timer 302, and the power supply abnormality is detected by the test module 5, including:

[0065] The time value of the delay of the delay circuit breaker 201 is collected by the timer 302, and the target time difference is determined according to the following formula based on the fixed time value of the delay of the delay circuit breaker 201 and the transmission channel between the delay circuit breaker 201 and the timer 302;

[0066]

[0067] Where ΔT represents the target time difference, T S represents the time value of the delay of the delay circuit breaker 201, T0 represents the fixed time value of the delay of the delay circuit breaker 201, T c represents the transmission time between the delay circuit breaker 201 and the timer 302 in the transmission channel, n represents the number of transmission channels between the delay circuit breaker 201 and the timer 302, and h i0 represents the distance between the current transmission channel and the other i-th transmission channel, and C represents the time constant;

[0068] The test module 5 calculates the weighted difference value between the target time difference and the preset deviation according to the following formula;

[0069] K=β*|ΔT-ΔT a |

[0070] Where K represents the weighted difference value, ΔT a represents the preset deviation, β represents the participation weight;

[0071] It is determined whether the weighted difference value is greater than a preset threshold value. If so, it is determined that the power supply is abnormal; otherwise, it is determined that the power supply is normal.

[0072] In this embodiment, C represents a time constant which is determined in advance according to the interactive influence of the distance of the transmission channel on the time difference between the channels.

[0073] In this embodiment, the participation weight is set according to the processing accuracy of the test module.

[0074] The beneficial effects of the above design scheme are: the time value of the delay of the delay circuit breaker 201 is collected by the timer 302, and the target time difference is determined based on the fixed time value of the delay of the delay circuit breaker 201 and the transmission channel between the delay circuit breaker 201 and the timer 302, eliminating the influence of the mutual influence between the transmission time and the channel on the time difference determination, ensuring the accuracy of the obtained target time difference, and then the test module 5 calculates the weighted difference value between the target time difference and the preset deviation according to the participating weight, showing the influence of the first verification module itself test, and realizing accurate judgment of power supply abnormality.

[0075] A TV mainboard with automatic detection of power supply anomalies includes a TV mainboard body 1, a power supply 2, a power supply sensor 3 and a test module 5, wherein the power supply 2 includes a delay circuit breaker 201, and the power supply sensor 3 includes a timer 302; in addition, the TV mainboard body 1 also includes a main chip 6, which is electrically connected to the power supply sensor 3 through a filter circuit 101, and the power supply sensor 3 is used to preliminarily sense the power supply, and the data is sent to the main chip 6 through the filter circuit 101.

[0076] In addition, a plurality of power supply sensors 3 are provided, and the plurality of power supply sensors 3 are connected in series through an integrated circuit 301. The timer 302 is electrically connected to the power supply sensor 3. The power supply is preliminarily sensed by the power supply sensor 3, and the data is sent to the main chip 6 through the filter circuit 101. The main chip 6 determines power supply abnormality.

[0077] Specifically, the circuit is connected through the power supply 2 of the TV main board body 1, and the power supply 2 supplies power to the delay circuit breaker 201 and the power supply sensor 3. The power supply is initially sensed by the power supply sensor 3, and the data is sent to the main chip 6 through the filter circuit 101. The power supply abnormality is judged by the main chip 6, and then the delay circuit breaker 201 is set. When the power supply is normal, the delay time of the delay circuit breaker 201 is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker 201 is affected and a deviation occurs. The time difference is collected by the timer 302, and the power supply abnormality is detected by the test module 5. Two completely different detection methods are used and cooperate with each other to ensure that the power supply abnormality can be accurately judged, and the detection effect is good and the accuracy is high.

[0078] In order to solve the problem that the existing abnormality detection method is complicated in actual use, which affects long-term work, please refer to Figure 1 - Figure 4 , this embodiment provides the following technical solutions:

[0079] A high-definition card reader 4, a program memory 7, a switching switch 8, a decoder 9, a frame memory 10 and a line-by-line processor 11 are arranged inside the TV main board body 1. The high-definition card reader 4, the program memory 7, the switching switch 8, the decoder 9, the frame memory 10 and the line-by-line processor 11 are electrically connected to the TV main board body 1 through a pin circuit.

[0080] In addition, the test module 5 includes a processor unit 501, the input end of the processor unit 501 is connected to the output end of the data comparison unit 504, and the output end of the processor unit 501 is connected to the input end of the memory 502 and the wireless transmission unit 503, and the detection records and results are sent to the memory 502 and the wireless transmission unit 503 to facilitate subsequent maintenance and repair work, and the delay circuit breaker 201 is powered by the power supply 2. When the power supply 2 is turned off, the power is delayed by the delay circuit breaker 201, and the filter circuit 101 is protected to increase the service life.

[0081] In addition, the input end of the data comparison unit 504 is connected to the output end of the voltage acquisition unit 505 and the time acquisition unit 506. The voltage acquisition unit 505 and the time acquisition unit 506 are used to collect the detection data of the power supply sensor 3 and the timer 302. The test module 5 set in the TV main board body 1 performs measurement and judgment work through the test module 5, and the circuit breaker time and voltage are collected, recorded and compared through the time acquisition unit 506 and the voltage acquisition unit 505.

[0082] In addition, the output end of the power supply 2 is respectively connected to the input end of the delay circuit breaker 201 and the power supply sensor 3, the input end of the power supply sensor 3 is connected to the input end of the filter circuit 101, and the output end of the filter circuit 101 is connected to the input end of the main chip 6. The delay circuit breaker 201 is powered by the power supply 2. When the power supply 2 is turned off, the power is delayed by the delay circuit breaker 201, and the filter circuit 101 is protected to increase its service life.

[0083] In addition, the output end of the filter circuit 101 is connected to the input end of the test module 5, the input end of the test module 5 is connected to the output end of the timer 302, and the input end of the timer 302 is connected to the input end of the delay circuit breaker 201. The detection work is performed by collecting, recording and comparing the circuit breaking time and voltage, and sending them to the processor unit 501 for judgment.

[0084] Specifically, the test module 5 provided on the TV main board body 1 performs measurement and judgment work through the test module 5, collects and records the circuit breaking time and voltage through the time acquisition unit 506 and the voltage acquisition unit 505, and compares them, and sends them to the processor unit 501 for judgment, thereby performing detection work, and sending the detection records and results to the memory 502 and the wireless transmission unit 503, so as to facilitate subsequent maintenance and repair work, and supplying power to the delay circuit breaker 201 through the power supply 2. When the power supply 2 is turned off, the power is delayed by the delay circuit breaker 201, and the filter circuit 101 is protected to increase the service life.

[0085] Working principle: During operation, the circuit is connected through the power supply 2 of the TV main board body 1, and the power supply 2 supplies power to the delay circuit breaker 201 and the power supply sensor 3. The power supply sensor 3 initially senses the power supply, and sends the data to the main chip 6 through the filter circuit 101. The main chip 6 determines the power supply abnormality, and supplies power to the delay circuit breaker 201 through the power supply 2. When the power supply 2 is turned off, the power is delayed by the delay circuit breaker 201, and the filter circuit 101 is protected. When the power supply is normal, the delay time of the delay circuit breaker 201 is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker 201 is affected, resulting in deviations, and the TV main board The test module 5 provided in the body 1 performs measurement and judgment through the test module 5, collects the time difference through the timer 302, and detects the power supply abnormality through the test module 5. Two completely different detection methods are adopted and cooperate with each other to ensure that the power supply abnormality can be accurately judged, the detection effect is good, and the precision is high. The circuit breaker time and voltage are collected, recorded and compared through the time acquisition unit 506 and the voltage acquisition unit 505, and sent to the processor unit 501 for judgment, so as to perform the detection work, and the detection record and results are sent to the memory 502 and the wireless transmission unit 503, so as to facilitate the subsequent maintenance and repair work.

[0086] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0087] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A method for automatically detecting power supply anomalies, characterized in that: The steps include: Step 1: The circuit is connected through the power supply (2) of the TV main board body (1), and the power supply (2) supplies power to the delay circuit breaker (201) and the power supply sensor (3); Step 2: The power supply sensor (3) initially senses the power supply, and sends the data to the main chip (6) through the filter circuit (101), and the main chip (6) determines whether the power supply is abnormal; Step 3: supplying power to the delay circuit breaker (201) through the power supply (2); when the power supply (2) is turned off, the delay circuit breaker (201) delays power off and protects the filter circuit (101); Step 4: When the power supply is normal, the delay time of the delay circuit breaker (201) is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker (201) is affected, resulting in deviation. The time difference is collected through the timer (302), and the power supply abnormality is detected through the test module (5).

2. The method for automatically detecting power supply anomalies according to claim 1, characterized in that: In the step 2, the power supply sensor (3) is composed of an array electrode, a wire, and a collection circuit board, and the array electrode is arranged in the area where the TV main board body (1) is located, and one end of the array electrode is connected to the p port of the collection circuit board by a wire in sequence, and all the n ports of the collection circuit board are connected by jumper caps, and the negative pole of the power supply electrode is connected to the n port of the collection circuit board by a wire. During the collection process, the sampling frequency of the DC power supply is set to 100 Hz, and 1600 data at each moment are collected each time to perform inductive power supply.

3. The method for automatically detecting power supply anomalies according to claim 1, characterized in that: In step 2, the power supply sensor (3) initially senses the power supply, and sends the data to the main chip (6) through the filter circuit (101), and the main chip (6) determines the power supply abnormality, including: The power supply sensor (3) performs preliminary induction power supply on the power supply (2) according to a preset induction cycle to obtain multiple sets of induction power supply data; Each set of induction power supply data is processed by a filter circuit (101) to reduce the ratio, thereby obtaining detection power supply data that is linearly related to the induction power supply data, and sending the power supply detection data to a main chip (6); The main chip (6) obtains the curve characteristics and numerical characteristics of the power supply detection data, compares the curve characteristics with the standard curve characteristics of normal power supply, and obtains normal curve characteristics and abnormal curve characteristics; Acquire a first numerical feature in the abnormal curve feature from the numerical feature, compare the first numerical feature with a standard numerical feature of normal power supply, and acquire a first curve feature that is not within a numerical range of the standard numerical feature, and a third curve feature that is within a numerical range of the standard numerical feature; Acquire a second numerical feature in the normal curve feature from the numerical feature, compare the second numerical feature with a standard numerical feature of normal power supply, and acquire a second curve feature that is not within the numerical range of the standard numerical feature; A first-level abnormality flag is configured for the inductive power supply data corresponding to the first curve feature, a second-level abnormality flag is configured for the inductive power supply data corresponding to the second curve feature, and a third-level abnormality flag is configured for the inductive power supply data corresponding to the third curve feature, to obtain a preliminary power supply abnormality judgment result.

4. The method for automatically detecting power supply anomalies according to claim 1, characterized in that: In step 4, when the power supply is normal, the delay time of the delay circuit breaker (201) is fixed. If the power supply is abnormal, the circuit breaking time of the delay circuit breaker (201) is affected, resulting in deviation. The time difference is collected by the timer (302), and the power supply abnormality is detected by the test module (5), including: The time value of the delay of the delay circuit breaker (201) is collected by the timer (302), and the target time difference is determined according to the following formula based on the fixed time value of the delay of the delay circuit breaker (201) and the transmission channel between the delay circuit breaker (201) and the timer (302); Where ΔT represents the target time difference, T S represents the time value of the delay of the delay circuit breaker (201), T0 represents the fixed time value of the delay of the delay circuit breaker (201), T c represents the transmission time between the delay circuit breaker (201) and the timer (302) in the transmission channel, n represents the number of transmission channels between the delay circuit breaker (201) and the timer (302), and h i0 represents the distance between the current transmission channel and the other i-th transmission channel, and C represents the time constant; The test module (5) calculates the weighted difference value between the target time difference and the preset deviation according to the following formula; K=β*|ΔT-ΔT a | Where K represents the weighted difference value, ΔT a represents the preset deviation, β represents the participation weight; It is determined whether the weighted difference value is greater than a preset threshold value. If so, it is determined that the power supply is abnormal; otherwise, it is determined that the power supply is normal.

5. A TV motherboard with automatic detection of power supply anomalies, used to implement the method for automatic detection of power supply anomalies as claimed in claim 2, characterized in that: The invention comprises a TV mainboard body (1), a power supply (2), a power supply sensor (3) and a test module (5), wherein the power supply (2) comprises a delay circuit breaker (201), the power supply sensor (3) comprises a timer (302), and the TV mainboard body (1) further comprises a main chip (6), wherein the main chip (6) is electrically connected to the power supply sensor (3) via a filter circuit (101).

6. The TV mainboard with automatic power supply abnormality detection according to claim 5, characterized in that: The TV mainboard body (1) is provided with a high-definition card reader (4), a program memory (7), a switching switch (8), a decoder (9), a frame memory (10) and a line-by-line processor (11) inside, and the high-definition card reader (4), the program memory (7), the switching switch (8), the decoder (9), the frame memory (10) and the line-by-line processor (11) are electrically connected to the TV mainboard body (1) through a pin circuit.

7. The TV mainboard with automatic power supply abnormality detection according to claim 5, characterized in that: A plurality of the power supply sensors (3) are provided, and the plurality of the power supply sensors (3) are connected in series via an integrated circuit (301), and the timer (302) is electrically connected to the power supply sensors (3).

8. The TV motherboard with automatic power supply abnormality detection according to claim 7, characterized in that: The test module (5) comprises a processor unit (501), the input end of the processor unit (501) is connected to the output end of the data comparison unit (504), and the output end of the processor unit (501) is connected to the input end of the memory (502) and the wireless transmission unit (503).

9. A TV mainboard with automatic detection of power supply anomalies according to claim 8, characterized in that: The input end of the data comparison unit (504) is connected to the output ends of the voltage acquisition unit (505) and the time acquisition unit (506), and the voltage acquisition unit (505) and the time acquisition unit (506) are used to collect detection data of the power supply sensor (3) and the timer (302).

10. The TV mainboard with automatic power supply abnormality detection according to claim 5, characterized in that: The output end of the power supply (2) is respectively connected to the input end of the delay circuit breaker (201) and the power supply inductor (3); the input end of the power supply inductor (3) is connected to the input end of the filter circuit (101); the output end of the filter circuit (101) is connected to the input end of the main chip (6); the output end of the filter circuit (101) is connected to the input end of the test module (5); the input end of the test module (5) is connected to the output end of the timer (302); and the input end of the timer (302) is connected to the input end of the delay circuit breaker (201).

Images