CN113311270A - Monitoring method and detection circuit of household appliance - Google Patents
Monitoring method and detection circuit of household appliance Download PDFInfo
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- CN113311270A CN113311270A CN202110594200.4A CN202110594200A CN113311270A CN 113311270 A CN113311270 A CN 113311270A CN 202110594200 A CN202110594200 A CN 202110594200A CN 113311270 A CN113311270 A CN 113311270A
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- 238000001514 detection method Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 title claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 19
- 238000012935 Averaging Methods 0.000 claims description 7
- 230000005856 abnormality Effects 0.000 claims 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The invention provides a monitoring method and a detection circuit of a household appliance, wherein the monitoring method of the household appliance comprises the following steps: the household appliance comprises a door lock device and a detection circuit for detecting the door lock device, and the monitoring method comprises the following steps: acquiring a voltage signal of a door lock device; detecting the opening and closing state of the door lock device according to the voltage signal; if the door lock device is in a closed state, processing a voltage signal of the door lock device to obtain a voltage value; and detecting whether the household appliance is abnormal or not according to the voltage value. According to the invention, the voltage signal of the door lock device is processed by judging the door lock device is in the closed state, and whether the household appliance is abnormal or not is judged by the processed voltage signal, so that the safety problem caused by the fact that a user uses the household appliance without knowing that the household appliance is abnormal can be avoided. And the detection circuit detects after detecting that the door lock is closed, so that the use safety of the household appliance is further improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of communication, in particular to a monitoring method and a detection circuit of a household appliance.
[ background of the invention ]
At present, with the rapid development of computer network technology, digital signal processing technology and modern communication technology, the household appliance industry is also rapidly developing. Among them, the door lock control of the home appliance is also more and more intelligent.
After the door lock is used for a period of time, the circuit is aged or damaged, but when a user does not know that the household appliance is abnormal, certain safety problems can be caused when the user continues to use the household appliance.
Therefore, it is necessary to provide a monitoring method of a home appliance and a detection circuit thereof to solve the above problems.
[ summary of the invention ]
The invention aims to provide a monitoring method of a household appliance and a detection circuit thereof, which solve the problem of certain safety caused by the fact that a user continues to use the household appliance under the condition that the user does not know that the detection circuit is abnormal.
The technical scheme of the invention is as follows: a monitoring method of a home appliance including a door lock device and a detection circuit for detecting the door lock device, the monitoring method comprising:
acquiring a voltage signal of the door lock device;
detecting the opening and closing state of the door lock device according to the voltage signal;
if the door lock device is in a closed state, processing the voltage signal of the door lock device to obtain a voltage value;
and detecting whether the household appliance is abnormal or not according to the voltage value.
Optionally, the processing the voltage signal of the door lock device to obtain the voltage value includes:
continuously collecting the voltage signals of the door lock device for n times within a first preset time to obtain a plurality of first voltage signals;
and averaging the plurality of first voltage signals to obtain the voltage value.
Optionally, the processing the voltage signal of the door lock device to obtain the voltage value includes:
continuously collecting voltage signals of the door lock device for n times within a second preset time to obtain a plurality of second voltage signals;
processing two second power signals in the second voltage signals at adjacent time to sequentially obtain a plurality of voltage difference values;
when the voltage difference values obtained in sequence tend to zero, the door lock device is in a stable state;
and if the door lock device is in a stable state, processing the voltage signal of the door lock device to obtain a voltage value.
Optionally, the detecting whether the household appliance is abnormal according to the voltage value includes:
when the voltage value is not between a first preset voltage and a second preset voltage, the household appliance is abnormal;
and if the household appliance is abnormal, controlling the detection circuit to stop working.
Optionally, the household appliance further comprises a load, and the load is electrically connected with the door lock device; the detecting whether the household appliance is abnormal according to the voltage value further comprises:
if the voltage value is between a first preset voltage and a second preset voltage, the detection circuit detects whether a zero-crossing signal exists or not;
and if the zero-crossing signal is detected, controlling the load to be switched on or off.
Optionally, before the controlling the load to be switched on or off, the method further includes:
acquiring the lag time of the zero-crossing signal;
and controlling the load to be switched on or switched off when the next zero-crossing signal is detected according to the delay time.
Optionally, the household appliance comprises an alarm device; if the household appliance is abnormal, the step of controlling the detection circuit to stop working further comprises the following steps:
and controlling the alarm device to give an alarm.
Optionally, the detecting the open/close state of the door lock device according to the voltage signal includes:
collecting voltage signals of the door lock device within a third preset time to obtain a plurality of third voltage signals;
converting the plurality of third voltage signals into digital signals, and averaging the digital signals to obtain a voltage average value;
and if the average voltage value is larger than the threshold value, the door lock device is in a closed state.
The invention also provides a monitoring method of a household appliance, the household appliance comprises a door lock device and a load electrically connected with the door lock device, and the monitoring method comprises the following steps:
acquiring a voltage signal of the door lock device;
detecting the opening and closing state of the door lock device according to the voltage signal;
if the door lock device is in a closed state, the detection circuit detects whether a zero-crossing signal exists;
controlling the load to be switched on or off if the zero-crossing signal is detected
The invention also provides a detection circuit of a household appliance, comprising:
a main chip;
one end of the relay circuit is electrically connected with the main chip, the other end of the relay circuit is respectively connected with a main power supply and the door lock device, and the relay circuit is used for switching on or switching off the connection between the main power supply and the door lock device according to a control signal sent by the main chip; and
one end of the first sub-circuit is electrically connected with the door lock device, the other end of the first sub-circuit is electrically connected with the main chip, the first sub-circuit converts an alternating current wave signal of the power supply into a direct current signal and transmits the direct current signal to the main chip, and the main chip detects whether the door lock device is closed or not according to the direct current signal;
and the main chip is used for detecting whether the voltage value of the detection circuit is normal or not according to the direct current signal after the door lock device is closed.
The invention has the beneficial effects that: according to the invention, the opening and closing state of the door lock device is judged by acquiring the voltage signal of the door lock device, when the door lock device is in the closing state, the voltage signal of the door lock device is processed, and whether the household appliance is abnormal or not is judged by the processed voltage signal, so that the safety problem caused by the fact that a user uses the household appliance without knowing that the household appliance is abnormal can be avoided. And the detection circuit detects after detecting that the door lock is closed, so that the use safety of the household appliance is further improved.
[ description of the drawings ]
Fig. 1 is a first flowchart of a household appliance monitoring method according to an embodiment of the present application;
fig. 2 is a third flowchart of a household appliance monitoring method according to an embodiment of the present application;
fig. 3 is a fourth flowchart illustrating a household appliance monitoring method according to an embodiment of the present application;
fig. 4 is a structural diagram of a detection circuit of a household appliance according to an embodiment of the present application;
fig. 5 is a schematic circuit diagram of a detection circuit of the door lock device shown in fig. 4.
[ detailed description ] embodiments
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The invention is further described with reference to the following figures and embodiments.
The frequency that domestic appliance used in daily life is more and more, but domestic appliance is after the live time is too long, and the condition that the circuit is ageing or the circuit damages can appear, and the user can not follow surface identification, can lead to the user to use domestic appliance under the condition of unknown to produce certain safety problem.
Accordingly, the present invention provides a monitoring method of a home appliance including a door lock device and a detection circuit for controlling the door lock device. The invention judges whether the door lock device is closed or not by detecting the voltage signal of the door lock device, continues to detect whether the household appliance is abnormal or not by the voltage signal of the door lock device after the door lock device is locked, and disconnects the detection circuit of the door lock device and sends out an alarm by the alarm device when the voltage of the household appliance is overhigh or overlow, thereby informing a user that the household appliance is abnormal, and avoiding the safety problem caused by the use of a client under the unknown condition. And this application just carries out the operation of other loads under the state that detects door lock device and close, has further improved the security of using domestic appliance.
Referring to fig. 1, fig. 1 is a first flowchart of a monitoring method for a household appliance according to an embodiment of the present disclosure.
101. And acquiring a voltage signal of the door lock device.
Before acquiring the voltage signal of the door lock device, the door lock device needs to be piloted, and the voltage signal in the door lock device needs to be detected.
It should be noted that the voltage signal for acquiring the door lock device is a plurality of first signals detected in a period of time after the door lock device is turned on. And averaging the plurality of first signals to obtain a voltage average value.
It should be noted that the home appliance includes a door lock device, a door, and a body. Wherein the door may be an electronic door lock, a PTC door lock, etc. installed on the home appliance, and the present application does not limit the type of the door.
It is understood that the household appliance may be a washing machine, a dishwasher, a microwave oven, etc., and the present application does not limit the specific type of the household appliance, and the household appliance only needs to be closed and then perform other operations.
In the related art, before a door lock device of many household appliances is not closed, a motor is always in a charged state, and if a circuit of the household appliance is aged or damaged or the like, a certain safety problem exists in the use process of a user. This application is at the relay actuation, and after the lock was closed, the motor was just in charged state. And through the judgement of closing and opening the door lock device, the operation of other functions is carried out after confirming that the door lock is closed, has avoided the security problem that the user used domestic appliance to lead to under the state that the door lock was opened, therefore this proposal has improved the security that the user used domestic appliance.
Illustratively, a control port of a main chip sends a control signal to a first relay, the first relay is attracted through the control signal, a detection circuit of a door lock detection device is switched on, a detection port is arranged on one port of the relay, the detection port detects a voltage signal input to the port within a period of time, the detected voltage signals are converted into digital signals and sent to the main chip, and the main chip performs averaging processing on the digital signals to obtain a voltage average value.
102. The open/close state of the door lock device is detected based on the voltage signal.
And comparing the processed average voltage value with a preset threshold value of a locking signal, and further judging the opening and closing state of the door lock device. Specifically, when the average voltage value is greater than a preset threshold of the locking signal, it is determined that the magnetic door lock device is in the closed state. And when the average voltage value is smaller than the preset threshold value of the locking signal, judging that the door lock device is in an off state.
For example, when the door lock device is in the off state, the household appliance may have an alarm device to give an alarm to remind the user. Specifically, the alarm device may be a sound module, a display module, or a lighting module, and the like, and the specific modules of the alarm device are not limited in this application. The alarm device can remind a user that the door lock device is in a disconnected state, so that the danger is reduced, and the safety performance of using the household appliance is improved.
103. And if the door lock device is in a closed state, processing the voltage signal of the door lock device to obtain a voltage value.
When the door lock device is in a closed state, the detection circuit of the door lock device continuously detects a voltage signal of the door lock device and processes the voltage signal to obtain a voltage value.
Specifically, first, in a second preset time, a second voltage signal of the door lock device is collected, and the second voltage signal is processed to obtain a voltage difference value. And then detecting whether the door lock device is in a stable state or not through the voltage difference value. When the door lock device is in a stable state, the voltage signal is processed to obtain a voltage value.
It is understood that the processing of the second voltage signal to obtain the voltage difference value includes: and continuously acquiring the voltage signals of the door lock device for n times within a second preset time to obtain a plurality of second voltage signals, and processing two second power signals of adjacent time in the plurality of second voltage signals to sequentially obtain a plurality of voltage difference values.
For example, during the time T2, the voltage signals of the door lock device are collected n times continuously, and a plurality of second voltage signals are obtained, for example, the plurality of second voltage signals sequentially include: v1, V2, V3, V4 and V5. Processing two second power signals of adjacent time in the plurality of second voltage signals to sequentially obtain a plurality of voltage difference values, for example, the plurality of voltage difference values sequentially are: Δ 1, Δ 2, Δ 3, and Δ 4.
It is understood that the detecting whether the door-lock apparatus is in a steady state by the voltage difference value includes: and comparing the plurality of processed voltage difference values according to a time sequence, and when the plurality of sequentially obtained voltage difference values tend to be zero, the door lock device is in a stable state.
And if the voltage difference values obtained in sequence do not tend to zero or the voltage difference values obtained in sequence have larger differences, the door lock device is not in a stable state.
When the door lock device is not in the stable state, the voltage signal of the door lock device is collected continuously and periodically within the second preset time, and whether the door lock device is in the stable state or not is detected until the door lock device is in the stable state.
Illustratively, in time T2, when a plurality of voltage difference values in time are calculated according to a plurality of second voltage values continuously collected, sequentially: Δ 1, Δ 2, Δ 3, and Δ 4, Δ 1, Δ 2, Δ 3, and Δ 4 are sequentially compared in time order, and when Δ 1, Δ 2, Δ 3, and Δ 4 tend to zero, the door-lock apparatus is in a steady state. It will be appreciated that when Δ 1, Δ 2, Δ 3 and Δ 4 do not approach zero, the door latch mechanism is not in a steady state and the steps described above are continued until the door latch mechanism is in a steady state.
When the door lock device is in a stable state, the first voltage signal of the door lock device is continuously collected for n times within a first preset time, and the first voltage signal is averaged to obtain a voltage value.
For example, during the time T1, the first voltage signal of the door lock device is collected n times continuously, for example, the plurality of second voltage signals are sequentially: v6, V7, V8, V9 and V10. And averaging the plurality of second voltage signals V6, V7, V8, V9 and V10 to obtain a voltage value D.
104. And judging whether the household appliance is abnormal or not according to the voltage value.
And comparing the obtained voltage value with the first preset voltage and the second preset voltage, and further judging whether the household appliance is abnormal. Specifically, when the first preset voltage is greater than the second preset voltage and the voltage value is not between the first preset voltage and the second preset voltage, that is, the voltage value is greater than the first preset voltage or less than the second preset voltage, the household appliance is abnormal. When the voltage value is between the first preset voltage and the second preset voltage, the household appliance is not abnormal.
It should be noted that specific values of the first preset voltage and the second preset voltage are set according to actual situations, and the application is not limited thereto. For example, in some embodiments, the first preset voltage may be 265V and the second preset voltage may be 85V. In other embodiments, the first predetermined voltage may be ten percent more than the normal voltage and the second predetermined voltage may be twenty percent less than the normal voltage.
Illustratively, according to the first preset time T1, the second preset time T2, and the first preset voltage DHighLimAnd a second preset voltage DLowLim。
In the time T2, the voltage difference in the time is calculated according to the voltage signals of the latch device collected n times, for example, the following are sequentially calculated: Δ 1, Δ 2, Δ 3, and Δ 4.
Comparing the delta 1, the delta 2, the delta 3 and the delta 4 in sequence according to the time sequence, and judging that the voltage enters a stable period when the delta 1, the delta 2, the delta 3 and the delta 4 tend to be zero.
Collecting voltage signals of the door lock device for n times within T1 time, and taking the average value of the voltage signals of the door lock device for n times to obtain a voltage value D, wherein if the voltage value D is greater than a first preset voltage, the voltage value D is the voltage value D>＝DHighLimThe voltage signal of the door lock device is judged to be too high. If the voltage value D is smaller than the first preset voltage, the voltage value D is<＝DLowLimIf so, the voltage signal of the door lock device is determined to be too low.
It can be understood that, when the voltage value is greater than the first preset voltage value, the voltage of the door lock device is too high, the household appliance is abnormal, and the household appliance is continuously used, so that the danger of explosion and the like caused by circuit burning can occur. When the voltage value is smaller than the first preset voltage value, the voltage of the door lock device is too low, the household appliance is abnormal, the household appliance cannot run, and many functions are limited, so that the user experience and the use feeling are not good.
Therefore, if the household appliance is detected to be abnormal, the detection circuit is controlled to stop working, and the alarm code is displayed on the display screen. For example, the control port of the main chip outputs a control signal, the control signal controls the disconnection relay and sends the control signal to the alarm device to alarm and display an alarm code. According to the method and the device, the safety of the user can be protected by detecting the abnormal condition of the household appliance, and the experience feeling of the user can be guaranteed.
Referring to fig. 2, fig. 2 is a third flowchart of a household appliance monitoring method according to an embodiment of the present disclosure.
201. And acquiring a voltage signal of the door lock device.
See step 101 for details, which are not described herein again.
202. The open/close state of the door lock device is detected based on the voltage signal.
See step 102 for details, which are not described herein.
203. If the door lock device is in a closed state, the detection circuit detects whether a zero-crossing signal exists.
When the door lock device is in a closed state, the detection circuit can detect whether a zero-crossing signal exists in the circuit according to the detection port.
Specifically, one port of the relay detects an alternating current signal on an alternating current line between a section of zero-crossing phases, and through external interruption, the zero-crossing signal can be detected, so that a zero-crossing point is detected, and the delay time of the zero-crossing signal is obtained.
204. And if the zero-crossing signal is detected, controlling the load to be switched on or off.
And if the zero-crossing signal is detected, setting a time delay program according to the delay time of the zero-crossing signal and the conduction time of a relay of the controller and the load. And controlling the load to be switched on or off when the next zero-crossing point is detected through a delay program.
It should be noted that the relays controlling each load may be different, and the on-time of each relay may also be different, so the time set by the delay program is also different. The present application is not limited thereto, and only the control of other loads is ensured to be performed at the zero crossing point.
After the door lock device is subjected to opening and closing detection, when the door lock is locked, the detection circuit detects whether a zero-crossing signal exists, and if the zero-crossing signal exists, the delay time and the zero crossing point of the zero-crossing signal are obtained. And setting a delay program to control the load to be switched on or switched off when the next zero crossing point is detected according to the delay time of the zero crossing signal and the conduction time of the load relay. The load is controlled when the zero crossing point is reached, and the relay can be controlled to be closed and opened to eliminate the spark problem of electric shock of the relay. And the control of other loads can reduce standby power consumption and reduce energy waste.
Referring to fig. 3, fig. 3 is a fourth flowchart illustrating a monitoring method for a household appliance according to an embodiment of the present disclosure.
301. And acquiring a voltage signal of the door lock device.
See step 101 for details, which are not described herein again.
302. The open/close state of the door lock device is detected based on the voltage signal.
See step 102 for details, which are not described herein.
303. And if the door lock device is in a closed state, processing the voltage signal of the door lock device to obtain a voltage value.
See step 103 for details, which are not described herein.
304. And judging whether the household appliance is abnormal or not according to the voltage value.
See step 104 for details, which are not described herein.
305. If the door lock device is in a closed state, the detection circuit detects whether a zero-crossing signal exists.
See step 203 for details, which are not described herein.
306. And if the zero-crossing signal is detected, controlling the load to be switched on or off.
See step 204 for details, which are not described herein.
It should be noted that, when the door lock device is detected to be in the closed state in the embodiment of the present application, it may be simultaneously detected whether the household appliance is abnormal or not and whether the detection circuit has a zero-crossing signal or not. It is also possible to detect only whether the household appliance is abnormal or only whether the detection circuit has a zero-crossing signal.
According to the embodiment of the application, the opening and closing state of the door lock device is detected, and when the door lock device is in the closing state, whether the household appliance is abnormal or not and whether the zero-crossing signal exists in the detection circuit or not can be detected. If the household appliance is abnormal, the use safety of the household appliance can be improved by early warning, and all loads can be started after the door lock is closed, so that the cost and the power consumption of the household controller are reduced, and the safety performance of the household appliance is also improved.
Referring to fig. 4 and 5, fig. 4 is a structural diagram of a detection circuit of a household appliance according to an embodiment of the present application, and fig. 5 is a schematic circuit structure diagram of the detection circuit of the door lock device shown in fig. 4. The embodiment of the application also provides a detection circuit of the household appliance. The detection circuit 50 includes: a main chip 501, a relay circuit 502, a main power supply 503, a door lock device 504, a first sub-circuit 505, and a second sub-circuit 506.
One end of the relay circuit 502 is electrically connected to the main chip 501, and the other end of the relay circuit 502 is connected to a main power supply 503 and a first end of the door lock device 504, respectively. The relay circuit 502 turns on the connection between the main power source 503 and the door lock apparatus 504 or turns off the connection between the main power source 503 and the door lock apparatus 504 in accordance with a control signal issued by the main chip 501. Specifically, when the port of the relay is closed, the main power 503 and the door lock 504 are turned on, and the control circuit can detect the open/close state of the door lock 504. When the port of the relay is open, the main power supply 503 and the door lock device 504 are not conductive.
Illustratively, when the user starts the use of the household appliance, the relay circuit 502 controls the port to be attracted, so that the door lock device 504 is conducted with the main power supply 503. When the household appliance is abnormal in use, the relay circuit 502 controls the port to be disconnected, so that the door lock device 504 is not conducted with the main power supply 503.
Illustratively, in conjunction with fig. 5, the relay circuit 502 may include a relay RY, a fifth diode D5, and a second transistor N2. The contact terminals of the relay RY are connected to a main power supply 503 and a door lock device 504, respectively. The fifth diode D5 is connected in parallel with the control terminal of the relay RY, and one end of the fifth diode D5 is connected to the second power source V2. The second transistor N2 includes a base, a collector, and an emitter. The base is connected to the main chip 501, the emitter is grounded, and the collector is connected to the other end of the fifth diode D5. The contact end of the relay RY includes two contacts, one of which is connected to the main power supply 503, specifically, one of which is connected to the live line of the utility power, and the other of which is connected to the door lock 504. The control end of the relay RY is also a coil, and a fifth diode D5 and a second triode N2 for control are connected to the coil in parallel. The second transistor N2 may be an internal resistance transistor or an external bias resistance transistor. The second power source V2 supplies power to the relay circuit 502, for example, the second power source V2 may be + 12V.
A second terminal of the door lock device 504 is electrically connected to the first sub-circuit 505 and a third terminal of the door lock device 504 is electrically connected to the second sub-circuit 506. The relay converts an ac signal of a power supply into a dc signal by detecting a voltage signal and transmits the dc signal to the main chip 501, and the main chip 501 detects an open/close state of the door lock device 504 according to the dc signal.
The other end of the first sub-circuit 505 is electrically connected to the main chip 501, the first sub-circuit 505 obtains a voltage value by detecting a voltage signal of the door lock device 504 and performing average processing on the voltage signal, and sends the voltage value to the main chip 501, and the main chip 501 determines whether the voltage value is between a first preset voltage and a second preset voltage, so as to determine whether the household appliance is abnormal.
Illustratively, in conjunction with fig. 5, the first sub-circuit 505 comprises: the circuit comprises a first diode D1, a second diode D2, a third diode D3, a third resistor R3, a second capacitor C2, a fourth resistor R4 and a third capacitor C3. The anode of the first diode D1 is connected to the output terminal of the voltage divider circuit 24. The anode of the second diode D2 is connected to the cathode of the first diode D1, and the cathode of the second diode D2 is connected to the first power source V1. The anode of the third diode D3 is grounded, and the cathode of the third diode D3 is connected to the cathode of the first diode D1. The third resistor R3 is connected in parallel with the third diode D3, i.e., one end of the third resistor R3 is connected to the cathode of the third diode D3, and the other end of the third resistor R3 is grounded. The second capacitor C2 is connected in parallel with the third resistor R3, i.e. one end of the second capacitor C2 is connected to one end of the third resistor R3, and the other end of the second capacitor C2 is grounded. One end of the fourth resistor R4 is connected to the cathode of the first diode D1, and the other end of the fourth resistor R4 is connected to the main chip 501. One end of the third capacitor C3 is connected to the other end of the fourth resistor R4, and the other end of the third capacitor C3 is grounded.
For example, if the voltage value is between the first preset voltage and the second preset voltage, the household appliance is normal and can continue to work. If the voltage value is not between the first preset voltage and the second preset voltage, the household appliance is abnormal, and the main chip 501 controls the relay to be disconnected and controls the alarm device to give an alarm.
The other end of the second sub-circuit 506 is electrically connected to the main chip 501, and the second sub-circuit 506 is configured to determine whether the detection circuit 50 has a zero-crossing signal, and control the load to be turned on or off if the zero-crossing signal exists. Specifically, the second sub-circuit 506 detects a zero-crossing signal and a zero-crossing point by detecting an alternating-current signal on an alternating-current power line between zero-crossing phases, and sends the zero-crossing signal and the zero-crossing point to the main chip 501, and the main chip 501 determines a delay time of the zero-crossing signal according to the zero-crossing signal and the zero-crossing point, and sends a signal for controlling a delay program to a relay for controlling a corresponding load according to the delay time, so that the relay is controlled to be switched on or off by sending a high level or a low level to the relay.
Illustratively, in conjunction with fig. 5, the second sub-circuit 506 includes a first transistor N1, a fourth diode D4, a fifth resistor R5, a sixth resistor R6, and a fourth capacitor C4. The first triode N1 comprises a base electrode, an emitting electrode and a collector electrode, wherein the base electrode is connected with the output end of the voltage division circuit, and the emitting electrode is grounded. The cathode of the fourth diode D4 is connected to the base of the first transistor N1, and the anode of the fourth diode D4 is grounded. One end of the fifth resistor R5 is connected to the collector of the first transistor N1, and the other end of the fifth resistor R5 is connected to the first power source V1. One end of the sixth resistor R6 is connected to the collector of the first transistor N1, and the other end of the sixth resistor R6 is connected to the main chip 501. One end of the fourth capacitor C4 is connected to the other end of the sixth resistor R6, and the other end of the fourth capacitor C4 is grounded. The fifth resistor R5 is also called a pull-up resistor, and the pull-up is to clamp an indeterminate signal at a high level through a resistor, and the resistor also plays a role in current limiting. The sixth resistor R6 functions as a current limiting resistor, and the sixth resistor R6 is also called a current limiting resistor. The fourth capacitor C4 is also called a filter capacitor.
The main chip 501 is mainly used for detecting whether the voltage value of the detection circuit 50 is normal or not according to the dc signal after the door lock device 504 is closed, so as to control the on/off of the door lock device 504. And judging whether a zero-crossing signal exists according to the alternating current signal, and realizing the control of the connection or disconnection of the load.
When the door lock device 504 is in the closed state, the door lock device 504 is only connected to the first sub-circuit 505, and the voltage signal of the door lock device 504 is further detected to determine whether the household appliance is abnormal. The door lock device 504 is connected with the first sub-circuit 505, so that the functions of detecting the state of the door lock device 504 and detecting high and low voltage are realized, and the safety of using household appliances by users is improved.
When the door lock device 504 is in the closed state, it is possible to further determine whether the door lock device 504 and the second sub-circuit 506 have zero-crossing signals, and control the on or off state of the rest of the loads at the zero-crossing points. The door lock device 504 is conducted with the second sub-circuit 506, so that the detection of the state and the zero-crossing detection of the door lock device 504 are realized, other loads are controlled after the door lock is closed, the use safety is ensured, the standby power consumption is reduced, the loads are controlled at the zero-crossing point, and the problem that sparks are caused by electric shock of a relay is solved.
When the door latch 504 is in the closed state, the door latch 504 may be turned on simultaneously with the first sub-circuit 505 and the second sub-circuit 506. The three functions of detecting the state of the door lock device 504, detecting high and low voltages and detecting zero-crossing are realized on one detection circuit 50, components are effectively utilized, stacking of the components is simplified, the cost and power consumption of the household controller are reduced, all loads can be started after the door lock is closed, and the safety performance of household appliances is also improved.
It is understood that, in practical applications, whether the door lock device 504 and the first sub-circuit 505 and the second sub-circuit 506 are conducted or not is determined according to specific situations, and is not limited in particular.
The embodiment of the application judges the opening and closing state of the door lock device 504 by acquiring the voltage signal of the door lock device 504, processes the voltage signal of the door lock device 504 when the door lock device 504 is in the closing state, judges whether the household appliance is abnormal or not by the processed voltage signal, and then can avoid the safety problem caused by the fact that a user uses the household appliance under the condition that the user does not know that the household appliance is abnormal. When the door lock device 504 is in a closed state, whether a zero-crossing signal exists or not is further judged, and the on-off state of other loads is controlled at a zero-crossing point, so that the problem of sparks caused by electric shock of a relay is solved, and the loads are protected. And the detection circuit 50 detects the door lock closing, so that the use safety of the household appliance is further improved.
The monitoring method for the household electrical appliance and the detection circuit 50 thereof provided by the embodiment of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A monitoring method of a household appliance including a door lock device and a detection circuit for detecting the door lock device, the monitoring method comprising:
acquiring a voltage signal of the door lock device;
detecting the opening and closing state of the door lock device according to the voltage signal;
if the door lock device is in a closed state, processing the voltage signal of the door lock device to obtain a voltage value;
and detecting whether the household appliance is abnormal or not according to the voltage value.
2. The monitoring method of claim 1, wherein the processing the voltage signal of the door lock device to obtain the voltage value comprises:
continuously collecting the voltage signals of the door lock device for n times within a first preset time to obtain a plurality of first voltage signals;
and averaging the plurality of first voltage signals to obtain the voltage value.
3. The monitoring method of claim 2, wherein the processing the voltage signal of the door lock device to obtain the voltage value comprises:
continuously collecting voltage signals of the door lock device for n times within a second preset time to obtain a plurality of second voltage signals;
processing two second voltage signals in the second voltage signals at adjacent time to sequentially obtain a plurality of voltage difference values;
when the voltage difference values obtained in sequence tend to zero, the door lock device is in a stable state;
and if the door lock device is in a stable state, processing the voltage signal of the door lock device to obtain a voltage value.
4. The monitoring method according to claim 1, wherein the detecting whether the household appliance has an abnormality according to the voltage value comprises:
if the voltage value is not between a first preset voltage and a second preset voltage, the household appliance is abnormal;
and if the household appliance is abnormal, controlling the detection circuit to stop working.
5. The monitoring method according to claim 4, wherein the household appliance further comprises a load electrically connected to the door lock device; the detecting whether the household appliance is abnormal according to the voltage value further comprises:
if the voltage value is between a first preset voltage and a second preset voltage, the detection circuit detects whether a zero-crossing signal exists or not;
and if the zero-crossing signal is detected, controlling the load to be switched on or off.
6. The monitoring method of claim 5, comprising, prior to the controlling the load to turn on or off:
acquiring the lag time of the zero-crossing signal;
and controlling the load to be switched on or switched off when the next zero-crossing signal is detected according to the delay time.
7. The monitoring method according to claim 4, wherein the household appliance comprises an alarm device; if the household appliance is abnormal, the step of controlling the detection circuit to stop working further comprises the following steps:
and controlling the alarm device to give an alarm.
8. The monitoring method according to claim 1, wherein the detecting of the open/closed state of the door lock device according to the voltage signal includes:
collecting voltage signals of the door lock device within a third preset time to obtain a plurality of third voltage signals;
converting the plurality of third voltage signals into digital signals, and averaging the digital signals to obtain a voltage average value;
and if the average voltage value is larger than the threshold value, the door lock device is in a closed state.
9. A monitoring method of a household appliance comprising a door lock device and a load electrically connected to the door lock device, the monitoring method comprising:
acquiring a voltage signal of the door lock device;
detecting the opening and closing state of the door lock device according to the voltage signal;
if the door lock device is in a closed state, the detection circuit detects whether a zero-crossing signal exists;
and if the zero-crossing signal is detected, controlling the load to be switched on or off.
10. A detection circuit of a household appliance, characterized in that it comprises:
a main chip;
one end of the relay circuit is electrically connected with the main chip, the other end of the relay circuit is respectively connected with a main power supply and the door lock device, and the relay circuit is used for switching on or switching off the connection between the main power supply and the door lock device according to a control signal sent by the main chip; and
one end of the first sub-circuit is electrically connected with the door lock device, the other end of the first sub-circuit is electrically connected with the main chip, the first sub-circuit converts an alternating current wave signal of the power supply into a direct current signal and transmits the direct current signal to the main chip, and the main chip detects whether the door lock device is closed or not according to the direct current signal;
and the main chip is used for detecting whether the voltage value of the detection circuit is normal or not according to the direct current signal after the door lock device is closed.
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Application publication date: 20210827 |