WO2016173353A1

WO2016173353A1 - Washing machine failure detection and processing method

Info

Publication number: WO2016173353A1
Application number: PCT/CN2016/077510
Authority: WO
Inventors: 杨林; 陈瑜; 薛凯; 方大丰; 于亮亮
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2015-04-28
Filing date: 2016-03-28
Publication date: 2016-11-03
Also published as: JP2018514306A; US20180135224A1; EP3290558C0; EP3290558B1; EP3290558A1; CN106149284B; EP3290558A4; CN106149284A; JP6697483B2; KR20180013898A

Abstract

Disclosed is a washing machine failure detection and processing method, comprising the following steps: a PC pointer detection step: respectively detecting various running processes of a washing machine; respectively detecting whether a current value of a logical register is the same as an assigned value after the running of various subprograms is ended, and if the current value is different from the assigned value, judging that a PC pointer fails, and keeping a record of a current failure occurring in which running process of the washing machine according to the assigned value; and when it is judged that the PC pointer fails, waiting for a time t1, and continuing to detect whether the current value of the logical register is the same as the assigned value, and if so, continuing to execute the subprogram, otherwise executing system resetting. In the washing machine failure detection and processing method in the present invention, an internal running error is prevented from occurring in an algorithm of a washing machine, a failure is detected by a system before being found by a user, and a corresponding security control measure is adopted, thereby guaranteeing the secure running of the washing machine.

Description

Description: A washing machine fault detection and processing method

[0001] The present invention belongs to the technical field of washing machines, and in particular to a washing machine fault detection processing method.

[0002] The current washing machine software program detection method only performs related processing on the threshold control signal, and uses two 10-port detection gate-off signals, and reads the gate-off signal input port every 10 ms, if it is read for 100 ms continuously. If the input signal is unchanged, the two 10-port signals are assigned to the buffer register after non-calculation. If there is a 10-port detection threshold, it is considered that the door is slamming, and the display panel communicates with the power control board. With the CRC 8-bit check, the display panel receives the threshold or communicates with the power control board for 3 seconds, then the motor is stopped. This method can not detect other faults of the washing machine, such as the motor has been rotating all the way or has been reversed, washing is not stopped; or the dehydration is not limited; or the water is not only the same phenomenon, or the whole machine is in the state of water, washing, dehydration, etc. There is no alarm on the upper cover, there are hidden dangers caused by the user, etc., which causes the above-mentioned faults in the washing machine during the washing process, and the fault is detected without any flaws, and there is a safety hazard. technical problem

[0003] In order to solve the technical problem that the program fault is not specifically detected during the operation of the washing machine, the present invention proposes a washing machine fault detection and processing method, which can solve the above problems.

Problem solution

Technical solution

[0004] In order to solve the above technical problem, the present invention is implemented by the following technical solutions:

[0005] A washing machine fault detection processing method includes the following steps:

[0006] PC pointer detection step

[0007] (11), respectively, detecting each running process of the washing machine, each running process of the washing machine corresponds to a subroutine, and each of the subprograms is initially assigned a logical register, the running process at least including a water filling process, washing Process, dehydration process;

[0008] (12), after the end of each subroutine, respectively, check whether the current value of the logical register is the same as the assignment value If the current value is different from the assignment value, the shell lj determines that the PC pointer is faulty, and records which running process of the washing machine occurs according to the assignment;

[0009] (13), when it is determined that the PC pointer is faulty, wait for the time t1, and continue to detect whether the current value of the logical register is the same as the assignment. If the same, continue to execute the subroutine, otherwise perform a system reset.

[0010] Further, in the step (13), after the execution system is reset, the current water level value detected by the water level sensor is read, and the current water level value is compared with the set water level value, if the current water level value is greater than or equal to If the water level value is set, the water injection process is skipped and the next process of the water injection process is performed. If the current water level value is zero, the dehydration process is performed.

[0011] Further, the zero crossing interruption detecting step is further included:

[0012] (21), setting the zero-crossing interrupt period Tl, detecting the actual zero-crossing interruption period of the signal loaded on the motor Τ

[0013] (22), comparison Τ is within the range of [Tl-Atl, Tl+Atl], and if so, it is determined that the zero-crossing interrupt is normal; otherwise, it is determined that the zero-crossing interrupt is abnormal;

[0014] (23) When it is determined that the zero-crossing interrupt is abnormal, a system reset is performed.

[0015] Further, the method further includes: determining an interrupt detection step:

[0016] When it is detected that the washing machine is slamming the upper cover during operation, the washing machine does not perform an alarm and/or stops the step of running the current subroutine, it is determined that the interrupt is abnormal and the system reset is performed.

[0017] Further, the DC fault detection step of the single chip RAM is further included:

[0018] periodically check all the addresses of the single-chip RAM using a checkerboard loop detection;

[0019] Before the detection, the value of the test address is saved and the interrupt is closed. First, one of the values of 0x55 or Oxaa is assigned to the first test address, and another value of 0x55 or Oxaa is assigned to the next test address. Then, the data in the two test addresses are respectively read and compared with the written data. If they are not equal, the RAM is considered to have a problem and the exception processing is performed; if they are equal, the other test addresses are detected in the same manner until all are The test address is detected.

[0020] Further, the method further includes the step of detecting the fault of the single chip register:

[0021] periodically using a checkerboard loop detection for all registers;

[0022] Write one value of 0x55 or Oxaa to each register one by one and then read, and compare whether the read value is consistent with the written value, and then write another value in 0x55 or Oxaa before reading Take, compare Whether the read value is consistent with the written value, only two comparison results are consistent, and the conclusion that the register is normal is obtained. Otherwise, the register has a fault and reports a register failure.

[0023] Further, the method further includes the step of detecting the ROM, calculating a CRC-16 checksum of the ROM area code, and comparing the calculation structure with a fixed CRC-16 checksum stored in the ROM, if not, I think there is a problem with the ROM and I am doing exception handling.

[0024] Further, in the step of detecting the ROM, each time the 32-byte data in the ROM is taken, the CRC-16 calculation is performed to obtain a check value, until all the data in the ROM is calculated, and all the ROM areas are obtained. CRC-16 check value.

[0025] Further, the method further includes the step of processing the special function register: periodically, the configuration register of the function module used by the single chip is repeatedly assigned according to the set value.

Advantageous effects of the invention

Beneficial effect

Compared with the prior art, the advantages and positive effects of the present invention are: The washing machine fault detection processing method of the present invention can prevent the internal operation error of the washing machine algorithm, prevent the water from entering, the empty bucket state, the washing, etc. The mode occurs, which ensures the safe operation of the washing machine and reduces the possibility of personal injury caused by the malfunction of the washing machine.

Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments.

Brief description of the drawing

DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a flow chart of a PC pointer detecting step in an embodiment of a washing machine failure detecting processing method according to the present invention;

2 is a flow chart of a zero-crossing interruption detecting step in an embodiment of a washing machine failure detecting processing method according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

[0032] Explanation of terms:

[0033] PC: program counter, the full text referred to as PC;

[0034] RAM: random access memory Abbreviation for Random Access Memory, referred to as RAM in full;

[0035] ROM: Read only memory Abbreviation for Read Only Memory, the full text is referred to as ROM;

[0036] CRC: Cyclic Redundancy Check Code Cyclic Redundancy

Abbreviation of Check, the full name is CRC, CRC-16 refers to 16-bit cyclic redundancy check code;

[0037] DC: Analog to digital conversion.

[0038] Embodiment 1 This embodiment provides a washing machine fault detection processing method, including the following steps: [0039] PC pointer detecting step, as shown in FIG. 1:

[0040] Sl l, respectively, detecting each running process of the washing machine, each running process of the washing machine corresponds to a subroutine, and each of the subroutine runs is initially assigned a logical register, and the running process at least includes a water filling process and a washing process. Dehydration process;

[0041] S12: After the end of each subroutine operation, respectively, whether the current value of the logical register is the same as the assignment value. If the current value is different from the assignment value, it is determined that the PC pointer is faulty, and according to the assignment, the current fault occurs in which operation of the washing machine. Process

[0042] S13. When it is determined that the PC pointer is faulty, wait for the time t1, and continue to detect whether the current value of the logical register is the same as the assignment. If the same, continue to execute the subroutine, otherwise perform a system reset.

[0043] The value of the PC pointer always points to the address of the running point of the current program. If the PC pointer is abnormal during the operation of the washing machine, the control fails, and the washing machine will continue to run for a certain period of time, such as washing.

Or dehydration; or water ingress. The above-mentioned faults cause damage to the motor or other hardware, and serious accidents may occur, threatening the personal safety of the user. The washing machine fault detection and processing method is detected by the PC pointer, and the operation safety problem can be detected and detected, and corresponding processing is taken to prevent the washing machine from appearing. The internal operation of the algorithm is wrong, resulting in incorrect operation mode such as water intake and empty bucket washing, which ensures the safe operation of the washing machine and reduces the possibility of personal injury caused by the washing machine failure.

[0044] In the embodiment, in the step S13, after the execution system is reset, in order to prevent the executed program from being repeatedly executed, such as the water injection process, if it has been filled, there is no need to inject water again, preventing further generation. A new fault occurs. Therefore, in this embodiment, by reading the current water level value detected by the water level sensor, the current water level value is compared with the set water level value. If the current water level value is greater than or equal to the set water level value, the water injection is skipped. Process, the next process of performing the water injection process, if in the washing state and the current water level value is zero, the dehydration process is performed. Since at least one complete subroutine is run through step S11 and step S12, it can be judged that at least the water injection process is performed. If the current water level value is zero, there is no need to refill water, wash, etc., and the dehydration process is directly executed, thereby avoiding Water and electricity are wasted, and washing is saved.

[0045] As a preferred embodiment, the zero-cross interrupt detection step is further included in this embodiment:

[0046] S21, setting a zero-crossing interrupt period Tl, detecting an actual zero-crossing interruption period of the signal loaded on the motor Τ;

[0047] S22, comparing whether T is within the range of [Tl-Atl, Tl+Atl], and if so, determining that the zero-crossing interrupt is normal; otherwise, determining that the zero-crossing interrupt is abnormal;

[0048] S23. When it is determined that the zero-crossing interrupt is abnormal, a system reset is performed.

[0049] The frequency of the commercial frequency power supply is 50 Hz. The hardware circuit is used to introduce the mains signal to the external interrupt port of the MCU. The interrupt is a zero-crossing interrupt, and the signal period is normally 20 ms. In the program, the signal period and the MCU are used. The device compares to determine if the interrupt or zero-crossing interrupt is normal. If the abnormality occurs in the zero-crossing interruption, it may be that the washing machine is running continuously or continuously reversed, and it is not easy to be discovered by the user. The washing machine fault detection processing method of the embodiment can detect the zero-crossing abnormality and Controls the execution of a system reset to protect the safe operation of the washing machine.

[0050] In this embodiment, the step of detecting the interrupt is further included:

[0051] When it is detected that the washing machine is slamming the upper cover during operation, and the steps of the alarm and/or the current running subroutine are not executed, it is determined that the interrupt is abnormal and the system reset is performed.

[0052] During the operation of the washing machine, the fixed interruption is used to detect the normal operation of the washing machine, the top cover of the washing machine, the cover of the whole machine, or other unsatisfactory conditions that the washing machine continues to operate, and can be controlled to stop operation, and Alarm to prevent damage to the user. If there is a problem with the interruption, it will cause a wash. The normal operation of the clothes machine does not alarm and does not stop running. There is a safety hazard. This embodiment further ensures the safe operation of the washing machine by detecting the fixed interruption.

[0053] If there is a DC fault in the single-chip RAM, the value written and read by the single-chip microcomputer is different, and the washing machine cannot be executed according to the setting program, and the washing machine cannot work normally. Therefore, in this embodiment, the DC fault detecting step of the single-chip RAM is also included. :

[0054] periodically using the checkerboard loop detection for all addresses of the single chip RAM;

[0055] Before the detection, the value of the test address is saved and the interrupt is closed, and the value of the test address is saved in order to resume the program according to the originally written value after the detection is completed, by not stopping the interrupt, in order to prevent Detecting 吋 generates an interrupt. In the interrupt program, the test value written into the RAM is treated as a normal value. First, assign one value of 0x55 or Oxaa to the first test address, and assign 0x55 to the next test address. Another value in Oxaa, the data in the two test addresses are read separately, and compared with the written data. If not, the RAM is considered to have a problem, and the exception processing is performed; if they are equal, the other method is used in the same manner. The test address is tested until all test addresses have been detected. The value written by 0x55 is: 01010101, and the value written by 0xaa is: 10101010. In this embodiment, 0x55 and Oxaa are respectively assigned to two adjacent RAM addresses, and the difference is numerically distinguished. , to prevent two addresses from being assigned the same value and a judgment error, to achieve the detection of the two addresses, improving the detection efficiency. After all the addresses have been detected, it is necessary to start from the first address and re-write another value that is not written by the address. For example, if the first address is first assigned 0x55, then only part of it can be written. The bit is written with 1. Therefore, the second assignment value should be assigned 0xaa, that is, the bit assigned to 0 in the first pass is assigned a value of 1 in the second pass, which enables all bits to be effectively detected.

[0056] Further in this embodiment, the method further includes: detecting a failure of the single chip register:

[0057] periodically using a checkerboard loop detection for all registers;

[0058] Write one value of 0x55 or Oxaa to each register one by one and then read, and compare whether the read value is consistent with the written value, and then write another value in 0x55 or Oxaa before reading Take, and compare whether the read value is consistent with the written value. Only two comparison results are consistent, and the conclusion that the register is normal is obtained. Otherwise, the register has a fault, the register is faulty, and the system reset step is performed. In this embodiment, the respective registers are detected, and the values of 0x55 and Oxaa are respectively written. , enables the ability to effectively detect all bits of the register.

[0059] further comprising the step of detecting the ROM, calculating a CRC-16 checksum of the ROM area code, and comparing the calculation structure with a fixed CRC-16 checksum stored in the ROM, if not, the ROM is considered to have Problem, exception handling. The CRC is an error check code characterized in that the length of the information field and the check field can be arbitrarily selected. Polynomial calculations can be performed on the data, and the results obtained are appended to the frame. The receiving device also performs a similar algorithm to ensure the correctness and integrity of the data transmission. In this embodiment, because the ROM area code length is long, the 8-bit CRC cannot meet the length requirement, and the 32-bit CRC causes computational waste. Therefore, in this embodiment, the 16-bit CRC check is preferably used for the ROM area code. And detection, that is, CRC-16, CRC-16 checksum detection can prevent errors in the program written to the ROM area, and the washing machine operates normally and safely only if the program is correct.

[0060] Specifically, in the embodiment, in the step of detecting the ROM, each time 32 bytes of data in the ROM are taken for CRC-16 calculation to obtain a check value, until all the data in the ROM is calculated, CRC-16 checksum for all ROM areas.

[0061] The washing machine fault detection processing method of the embodiment further includes the step of processing the special function register: periodically configuring the configuration register of the function module used by the single chip to perform repeated assignment according to the set value. Special registers generally control the input and output ports of the MCU. In order to prevent errors in the input and output ports defined in the program during operation, such as the input port becoming an output port, or the output port becoming an input port, an error will occur. Therefore, the method does not stop assigning values, even if there is an error in the intermediate process, the correct value of the method can be changed by the repeated assignment of the method, and the correct operation of the program is not affected.

The above description is of course not a limitation of the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions made by those skilled in the art within the scope of the invention, It should also fall within the scope of protection of the present invention.

Claims

Claim

[Claim 1] A washing machine fault detection processing method, comprising the following steps:

PC pointer detection step

(11), respectively detecting the running process of the washing machine, each running process of the washing machine corresponds to a subroutine, and each of the subroutine runs is initially assigned a logical register, the running process at least includes a water filling process, a washing process, and dehydration. Process

(12), after the end of each subroutine, check whether the current value of the logical register is the same as the assignment. If the current value is different from the assignment, it is determined that the PC pointer is faulty, and according to the assignment, the current fault of the washing machine is recorded according to the assignment. ;

(13) When it is judged that the PC pointer is faulty, wait for the time tl, and continue to detect whether the current value of the logical register is the same as the assignment. If the same, continue to execute the subroutine, otherwise the system reset is performed.

[Claim 2] The washing machine failure detecting processing method according to claim 1, further comprising the zero-crossing interruption detecting step:

(21) Set the zero-crossing interrupt period Tl, and detect the actual zero-crossing interrupt period of the signal loaded on the motor Τ;

(22), compare Τ is within the range of [Tl-Atl, Tl+Atl], if yes, it is judged that the zero-crossing interrupt is normal, otherwise, it is judged as zero-crossing interrupt abnormality;

(23) When a zero-cross interrupt exception is determined, a system reset is performed.

[Claim 3] The washing machine failure detecting processing method according to claim 1 or 2, further comprising a step of detecting the interruption:

When it is detected that the washing machine is slamming the top cover during operation, the washing machine does not perform the alarm and/or the step of stopping the current running subroutine, it is judged that the interrupt is abnormal and the system is reset.

[Claim 4] The washing machine fault detection processing method according to claim 1 or 2, further comprising a DC fault detecting step of the single chip RAM:

Periodically check all the addresses of the single-chip RAM using the checkerboard loop detection;

Save the value of the test address and turn off the interrupt before testing. First, give the first test address. Assign one of the values in 0x55 or Oxaa, and assign another value in the 0x55 or Oxaa to the next test address, and then read the data in the two test addresses and compare them with the written data. It is considered that there is a problem with the RAM, and the exception processing is performed; if they are equal, the other test addresses are detected in the same manner until all the test addresses are detected.

[Claim 5] The washing machine fault detection processing method according to claim 4, further comprising the step of detecting the failure of the single-chip register:

Periodically check the checkbox cycle for all registers;

Write one value of 0x55 or Oxaa to each register one by one, then read it, compare the read value with the written value, and then write another value in 0x55 or Oxaa before reading. Compare the read value with the written value. Only the two comparison results are consistent. The conclusion is that the register is normal. Otherwise, the register has a fault and the register is faulty.

[Claim 6] The washing machine failure detecting processing method according to claim 5, further comprising the step of detecting the ROM, calculating a CRC-16 checksum of the ROM area code, and storing the calculation structure and the ROM. The fixed CRC-16 checksum is compared. If it is inconsistent, Bay 1J considers that there is a problem with the ROM and performs exception handling.

[Claim 7] The washing machine failure detecting processing method according to claim 6, wherein the RO is

In the step of M detection, each time 32 bytes of data in the ROM are taken for CRC-16 calculation to obtain a check value, until all the data in the ROM is calculated, the CRC-16 check value of all ROM areas is obtained.

[Claim 8] The washing machine fault detection processing method according to claim 7, further comprising the step of processing the special function register: periodically configuring the function module of the function module used by the single chip according to the set value Repeat the assignment.