CN116893592A - Temperature sensor abnormality detection method and image forming apparatus - Google Patents
Temperature sensor abnormality detection method and image forming apparatus Download PDFInfo
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- G—PHYSICS
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- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/55—Self-diagnostics; Malfunction or lifetime display
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
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Abstract
The application provides a temperature sensor abnormality detection method and an image forming device, and relates to the technical field of imaging. The temperature sensor abnormality detection method comprises the following steps: first, the control unit may acquire the second temperature value detected by the second temperature sensor after the first temperature value detected by the first temperature sensor reaches the target threshold range. Then, the control unit may determine the abnormal sensor from the two temperature sensors based on a magnitude relation between the second temperature value and the preset first and second thresholds. The technical scheme has simple scene and high detection rate, and can directly determine the abnormal sensor from the two temperature sensors, thereby improving the safety of the fixer in the use process.
Description
[ field of technology ]
The present application relates to the field of imaging technologies, and in particular, to a temperature sensor abnormality detection method and an image forming apparatus.
[ background Art ]
Image forming apparatuses such as printers and copiers include a fixing device having a heater for fixing a printing medium such as toner on a sheet of paper by heating, thereby completing image formation. In order to ensure the safety of the heating process, a temperature sensor for detecting the heating temperature of the heater is further provided in the fixer. However, when the temperature sensor is abnormal, the overheat condition cannot be effectively detected in time, so that a safety accident occurs. Therefore, it is necessary to provide an effective method for detecting abnormal conditions of the sensor.
[ application ]
The embodiment of the application provides a temperature sensor abnormality detection method and an image forming device, which can be used for accurately detecting the abnormality of a temperature sensor in a fixer and distinguishing a specific abnormality sensor.
In a first aspect, an embodiment of the present application provides a temperature sensor abnormality detection method applied to a control unit of an image forming apparatus, the control unit being connected to a fixer, the fixer including a heating unit; the method comprises the following steps: acquiring a first temperature value detected by a first temperature sensor, wherein the first temperature sensor is positioned in the middle of the heating unit; acquiring a second temperature value detected by a second temperature sensor when the first temperature value reaches a target threshold range, wherein the second sensor is positioned at the end part of the heating unit; the target threshold range is determined according to a threshold value of the fixer, which is switched from a first working state to a second working state; comparing the second temperature value with a first threshold value and a second threshold value respectively; and determining an abnormal sensor from the first temperature sensor and the second temperature sensor according to the comparison result.
In one possible implementation manner, before acquiring the first temperature value detected by the first temperature sensor, the method further includes: and determining that the fixer is in a first working state, wherein the first working state is a preheating state.
In one possible implementation manner, in a case that the first temperature value reaches a target threshold range, the method further includes: and controlling the fixer to be switched to a second working state, wherein the second working state is a standby state.
In one possible implementation manner, determining an abnormal sensor from the first temperature sensor and the second temperature sensor according to the comparison result includes: determining whether the first temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and the first threshold value; and determining whether the second temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and a second threshold value.
In one possible implementation manner, determining whether the first temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and the first threshold value includes: determining that the first temperature sensor is an abnormal sensor if the second temperature value is greater than the first threshold value; determining whether the second temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and a second threshold value, including: and determining that the second temperature sensor is an abnormal sensor when the second temperature value is smaller than the second threshold value.
In one possible implementation manner, determining that the first temperature sensor is an abnormal sensor if the second temperature value is greater than the first threshold value includes: timing a time period for which the second temperature value is greater than the first threshold value, if the second temperature value is greater than the first threshold value; detecting that the timing time exceeds a time threshold, and determining that the first temperature sensor is an abnormal sensor; determining that the second temperature sensor is an abnormal sensor if the second temperature value is less than the second threshold value, comprising: timing a time period for which the second temperature value is less than the second threshold value, if the second temperature value is less than the second threshold value; and detecting that the timing duration exceeds the duration threshold, and determining that the second temperature sensor is an abnormal sensor.
In one possible implementation manner, determining that the first temperature sensor is an abnormal sensor if the second temperature value is greater than the first threshold value includes: counting a number of times the second temperature value is greater than the first threshold value, if the second temperature value is greater than the first threshold value; detecting that the count value exceeds a frequency threshold value, and determining that the first temperature sensor is an abnormal sensor; determining that the second temperature sensor is an abnormal sensor if the second temperature value is less than the second threshold value, comprising: counting a number of times the second temperature value is less than the second threshold value, if the second temperature value is less than the second threshold value; and detecting that the count value exceeds the frequency threshold value, and determining that the second temperature sensor is an abnormal sensor.
In one possible implementation manner, the value of the first threshold value is located between the first normal temperature and the first abnormal temperature value; the first normal temperature is a temperature value detected by the second temperature sensor after the first temperature value reaches the target threshold range in a normal state of the first temperature sensor; the first abnormal temperature value is a temperature value detected by the second temperature sensor after the first temperature value reaches the target threshold range in the abnormal state of the first temperature sensor; the value of the first threshold value is positively correlated with the degree of deviation between the first temperature sensor and the heating unit; the value of the first threshold value is in positive correlation with the external input voltage and the heating unit power.
In one possible implementation manner, the value of the second threshold value is located between a second normal temperature value and a second abnormal temperature value; the second normal temperature value is a temperature value detected by the second temperature sensor in a normal state after the first temperature value reaches the target threshold range in the normal state of the first temperature sensor; the second abnormal temperature value is a temperature value detected by the second temperature sensor in an abnormal state after the first temperature value reaches the target threshold range in a normal state of the first temperature sensor; the value of the second threshold value and the deviation degree between the second temperature sensor and the heating unit are in a negative correlation relationship; the value of the second threshold value is in positive correlation with the external input voltage and the heating unit power.
In one possible implementation manner, after determining the abnormal sensor from the first temperature sensor and the second temperature sensor according to the comparison result, the method further includes: and controlling the heating unit to stop heating and generating abnormal prompt information.
In a second aspect, an embodiment of the present application provides an image forming apparatus including: a control unit and a fixer connected with the control unit; the fixing device comprises a heating unit, wherein a first temperature sensor is arranged in the middle of the heating unit, and a second temperature sensor is arranged at the end part of the heating unit; the control unit is capable of performing the method as described in the first aspect.
In a third aspect, an embodiment of the present application provides an electronic device, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing the method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing computer instructions that cause a computer to perform the method of the first aspect.
In the above technical solution, first, the control unit may acquire the second temperature value detected by the second temperature sensor after the first temperature value detected by the first temperature sensor reaches the target threshold range. Then, the control unit may determine the abnormal sensor from the two temperature sensors based on a magnitude relation between the second temperature value and the preset first and second thresholds. The technical scheme has simple scene and high detection rate, and can directly determine the abnormal sensor from the two temperature sensors, thereby improving the safety of the fixer in the use process.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an image forming apparatus according to an embodiment of the present application;
FIG. 2 is a flowchart of a method for detecting abnormality of a temperature sensor according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a temperature variation curve according to an embodiment of the present application;
fig. 4 is a schematic diagram of a scenario in which a temperature sensor deviates from a heating unit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of another temperature variation curve according to an embodiment of the present application;
FIG. 6 is a schematic diagram of another temperature variation curve according to an embodiment of the present application;
FIG. 7 is a flowchart of another method for detecting abnormality of a temperature sensor according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
[ detailed description ] of the application
For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 is a schematic structural diagram of an image forming apparatus according to an embodiment of the present application. As shown in fig. 1, the image forming apparatus provided by the present application may include a control unit 11 and a fixer 12 connected to the control unit 11. As the name suggests, fuser 12 is a component for "fusing" in an image forming apparatus. Specifically, as shown in fig. 1, the fixing device 12 includes a heating unit 121, and the heating unit 121 can heat under the control of the control unit 11, and after the heating temperature reaches a target value, a heating medium such as carbon powder can be fixed on the paper to realize image formation.
In order to improve the safety of the fixing process, the heating unit 121 may further be provided with a temperature sensor for detecting the heating temperature of the heating unit 121, so as to timely find and report the overheat condition of the heating unit 121, thereby preventing the occurrence of safety accidents. As shown in fig. 1, in the embodiment of the application, the temperature sensor may include a first temperature sensor 122 and a second temperature sensor 123, wherein the first temperature sensor 122 may be disposed at a middle portion of the heating unit 121, and the second temperature sensor 123 may be disposed at an end portion of the heating unit 121. The temperature sensor abnormality detection method provided by the embodiment of the application can be used for detecting the abnormality of the temperature sensor in fig. 1, and accurately distinguishing which is the abnormality sensor from the first temperature sensor and the second temperature sensor, so as to prompt a user, facilitate quick maintenance and prevent safety accidents caused by further rising of the temperature of the fixer.
The image forming apparatus provided by the present application may be, for example, an inkjet printer, a laser printer, a light emitting diode (Light Emitting Diode, LED) printer, a copier or a multifunction integrated machine, a multifunction peripheral (Multi-Functional Peripheral, MFP) that performs the above functions in a single device, or the like. The application is not limited in this regard.
The temperature sensor abnormality detection method provided by the present application will be described below by taking the image forming apparatus shown in fig. 1 as an example. The temperature sensor abnormality detection method provided by the application can be specifically executed in the control unit.
Fig. 2 is a flowchart of a method for detecting an abnormality of a temperature sensor according to an embodiment of the present application. As shown in fig. 2, the temperature sensor abnormality detection method may include:
step 101, a first temperature value detected by a first temperature sensor is obtained.
In the embodiment of the application, when the control unit determines that the fixer is in the first working state, the temperature detection flow can be started, and the first temperature value detected by the first temperature sensor is obtained according to the set period. The first working state refers to a preheating state, and the heating unit continuously heats in the preheating state.
Specifically, the control unit may acquire the first temperature value by first generating, by the first temperature sensor, a voltage signal related to the temperature of the heating unit. Then, the voltage signal can be output to an analog-to-digital conversion unit, and the analog-to-digital conversion unit can perform analog-to-digital conversion on the voltage signal to obtain a first temperature value. Finally, the obtained first temperature value can be sent to the control unit by the analog-to-digital conversion unit.
Step 102, acquiring a second temperature value detected by a second temperature sensor when the first temperature value reaches a target threshold range.
After each time the first temperature value is obtained, the control unit may determine the first temperature value to determine whether the preheating temperature of the heating unit reaches the target threshold range. The target threshold range may be determined based on a threshold value at which the fuser is switched from the first operating state to the second operating state. For example, the target threshold range may be a numerical range taking the threshold value as a number, and the size of the numerical range may be flexibly determined according to actual requirements. Alternatively, the target threshold range may be a numerical range defined by the threshold value and a larger numerical value, where the value of the larger numerical value may be flexibly determined according to the actual requirement.
In the case where it is determined that the first temperature value reaches the target threshold range, at this time, the control unit may control the fixing unit to switch to the second operating state, on the one hand. The second operating state refers to a standby state in which the heating unit will stop heating first. Subsequently, the temperature of the heating unit continues to rise due to the remaining temperature, a phenomenon called temperature overshoot. Further, when the temperature rises to the peak value, the temperature will fall back to the target temperature in the standby stage. At this time, the control unit may maintain the temperature of the heating unit at the target temperature of the standby phase by controlling the heating or stopping of the heating unit. Wherein the target temperature of the standby phase is lower than the target threshold range. On the other hand, the control unit may also acquire a second temperature value detected by the second temperature sensor.
Step 103, comparing the second temperature value with the first threshold value and the second threshold value respectively.
And 104, determining an abnormal sensor from the first temperature sensor and the second temperature sensor according to the comparison result.
In the embodiment of the application, the control unit can determine the abnormal sensor from the first temperature sensor and the second temperature sensor according to the magnitude relation between the second temperature value and the first threshold value and the second threshold value.
Fig. 3 is a schematic diagram of a temperature change curve according to an embodiment of the present application. As shown in fig. 3, the temperature change curve 31 is a change curve of a first temperature value detected by the first temperature sensor in a normal state, the temperature change curve 32 is a change curve of a first temperature value detected by the first temperature sensor in an abnormal state, the temperature change curve 33 is a change curve of a second temperature value detected by the second temperature sensor in a normal state of the first temperature sensor, and the temperature change curve 34 is a change curve of a second temperature value detected by the second temperature sensor in an abnormal state of the first temperature sensor.
As can be seen from fig. 3, in the actual scenario, during the warm-up phase, the detected first temperature value of the first temperature sensor reaches the target threshold range T regardless of whether the first temperature sensor is abnormal t And then enters a standby phase. However, after entering the standby phase, the second temperature value detected by the second temperature sensor may have a large difference based on whether the first temperature sensor is abnormal or not. Specifically, as shown in fig. 3, in the case where the first temperature sensor is normal, the first temperature value reaches the target threshold range T t After that, since the second temperature sensor is located at the end of the heating unit, the second temperature value detected by the second temperature sensor will be slightly lower than the first temperature value detected by the first temperature sensor. In the case of abnormality of the first temperature sensor, the first temperature value reaches the target Target threshold range T t Then, at this time, the actual temperature of the heating unit is already higher than the first temperature value, and therefore, the second temperature value detected by the second temperature sensor will be higher than the first threshold value. The value of the first threshold value is between the first normal temperature and the first abnormal temperature value. The first normal temperature is a temperature value detected by the second temperature sensor after the first temperature value reaches a target threshold range in a normal state of the first temperature sensor. The first abnormal temperature value is a temperature value detected by the second temperature sensor after the first temperature value reaches a target threshold range in an abnormal state of the first temperature sensor. The value of the first threshold may be determined according to a target threshold range, for example, may be greater than the maximum value of the target threshold range, or less than the minimum value of the target threshold range, or equal to any value within the target threshold range. In particular, it may be determined empirically. The value of the first threshold is positively correlated with the temperature overshoot value of the first temperature sensor in the normal state, and is positively correlated with the deviation degree between the first temperature sensor and the heating unit. Furthermore, the value of the first threshold value is in positive correlation with the external input voltage and the power of the heating unit. When the first temperature sensor is offset from the heating unit (fixing roller) by the same distance, the larger the external input voltage or the heating unit power is, the higher the temperature overshoot value of the heating unit is, the larger the temperature detected by the second temperature sensor is, and the larger the value of the first threshold value can be set.
Based on the temperature change curve shown in fig. 3, in the embodiment of the application, whether the first temperature sensor is abnormal may be determined according to the comparison result of the second temperature value and the first threshold value.
In one possible implementation, the first temperature sensor may be determined to be an anomaly sensor if the second temperature value is greater than the first threshold value.
In another possible implementation, to prevent the tip noise from affecting the hardware acquisition signal, a duration threshold t may be set 0 . In the event that the second temperature value is greater than the first threshold, the duration that the second temperature value is greater than the first threshold may be timed. Detecting that the time duration exceeds a duration threshold t 0 After that, can be confirmedThe first temperature sensor is defined as an anomaly sensor.
In yet another possible implementation, to prevent tip noise from affecting the hardware acquisition signal, a frequency threshold N may be set 0 . In the case where the second temperature value is greater than the first threshold value, the number of times the second temperature value is greater than the first threshold value may be counted. Detecting that the count value exceeds the count threshold N 0 After that, the first temperature sensor may be determined to be an abnormal sensor.
In an embodiment of the present application, the first temperature sensor fault type may be an offset heating unit. Fig. 4 is a schematic diagram of a scenario in which a sensor deviates from a heating unit according to an embodiment of the present application. As shown in fig. 4, the heating unit may be provided with a first temperature sensor 122 and a second temperature sensor 123. In a normal state, the detecting member 13 of the temperature sensor is disposed closely to the heating unit. When a deviation occurs between the temperature sensor and the heating unit, the detecting member 13 of the temperature sensor is away from the heating unit in the heating unit cross-sectional direction. As is clear from fig. 4, the greater the temperature sensor is deviated from the heating unit at the same heating temperature of the heating unit, the lower the temperature actually detected by the temperature sensor is.
Fig. 5 is a schematic diagram of another temperature variation curve according to an embodiment of the present application. As shown in fig. 5, the temperature change curve 41 is a change curve of a first temperature value detected by the first temperature sensor in a normal condition, the temperature change curve 42 is a change curve of a second temperature value detected by the second temperature sensor in a normal condition, and the temperature change curve 43 is a change curve of a second temperature value detected by the second temperature sensor in an abnormal condition.
Based on the temperature change curve shown in fig. 5, in the actual scenario, in the preheating stage, when the first temperature value detected by the first temperature sensor reaches the target threshold range T under the condition that the first temperature sensor is normal t Thereafter, if the second temperature sensor is normal, the second temperature sensor is located at the end of the heating unit, and therefore the detected second temperature value will be slightly smaller than the first temperature value but greater than the second threshold value T t -T 1 . If the second temperature isThe degree sensor is abnormal, then the second temperature value detected by the second temperature sensor is smaller than the second threshold value T t -T 1 。
Wherein the second threshold T t -T 1 And the value of the second temperature sensor is in negative correlation with the deviation degree of the second temperature sensor. The larger the distance of the second temperature sensor from the heating unit (fixing roller), the smaller the temperature detected by the second temperature sensor, the second threshold T t -T 1 The smaller the settable value, the more specifically can be determined empirically. Further, a second threshold T t -T 1 The value of (2) is also in positive correlation with the external input voltage and the power of the heating unit. When the second temperature sensor is deviated from the heating unit (fixing roller) by the same distance, the higher the external input voltage or the power of the heating unit is, the higher the overshoot value of the temperature of the heating unit is, the higher the temperature detected by the second temperature sensor is, the second threshold T is t -T 1 The larger the settable value is, T 1 The smaller the settable value.
Based on the temperature change curve shown in fig. 5, in the embodiment of the present application, whether the second temperature sensor is abnormal may be determined according to the comparison result of the second temperature value and the second threshold value. In one possible implementation, the second temperature sensor may be determined to be an anomaly sensor if the second temperature value is less than a second threshold value.
In another possible implementation, to prevent the tip noise from affecting the hardware acquisition signal, a duration threshold t may be set 0 . In the event that the second temperature value is less than the second threshold, a time period during which the second temperature value is less than the second threshold may be counted. Detecting that the time duration exceeds a duration threshold t 0 After that, the second temperature sensor may be determined to be an abnormal sensor.
In yet another possible implementation, to prevent tip noise from affecting the hardware acquisition signal, a frequency threshold N may be set 0 . In the case where the second temperature value is less than the second threshold value, the number of times the second temperature value is less than the second threshold value may be counted. Detecting that the count value exceeds the count threshold N 0 After that, the second temperature can be determinedThe degree sensor is an anomaly sensor.
In an embodiment of the present application, the second temperature sensor fault type may be a deviating heating unit, or a loop break. The condition of the loop disconnection may include disconnection of the second temperature sensor, missing plug or damage to the data board, etc.
Further, in another embodiment of the present application, in the case of determining that the second temperature sensor is abnormal, a specific fault type of the second temperature sensor may be determined.
Specifically, in an actual scenario, as shown in fig. 6, in the case where the second temperature sensor deviates from the heating unit, the second temperature value 431 detected by the second temperature sensor will be smaller than the above-mentioned second threshold value. In the event of a second temperature sensor circuit break, the second temperature value 432 detected by the second temperature sensor will be less than the third threshold T t -T 2 The third threshold is less than the second threshold.
Therefore, in the embodiment of the present application, in the case where it is determined that the second temperature sensor is abnormal, the second temperature value may be further compared with the third threshold value, and in the case where it is determined that the second temperature value is greater than the third threshold value, it may be determined that the fault type of the second temperature sensor is deviated from the heating unit. In the event that the second temperature value is determined to be less than the third threshold, the fault type of the second temperature sensor may be determined to be a loop open.
Through the technical scheme, the abnormal detection of the sensors can be accurately realized, the specific abnormal sensors are distinguished from the sensors, and the specific fault types are determined. Moreover, the scheme is only required to be executed at a specific stage of the operation process of the fixer, the scene is simple, and the false alarm risk is greatly reduced.
Fig. 7 is a flowchart of a temperature sensor abnormality detection method according to another embodiment of the present application. As shown in fig. 7, the method for detecting abnormality of a temperature sensor provided by the embodiment of the application may include:
in step 201, the control unit detects that the fixer is in a warm-up state.
In step 202, the control unit obtains a first temperature value detected by the first temperature sensor.
In step 203, the control unit determines whether the first temperature value reaches a target threshold range. If yes, go to step 204; otherwise, step 202 is continued.
In the embodiment of the present application, after the control unit detects that the fixing device is in the preheating state, the first temperature value detected by the first sensor may be obtained, and the specific obtaining manner may refer to the foregoing embodiment. The control unit may then determine whether the first temperature value has reached the target threshold range, and if so, may continue to step 204. Otherwise, the control unit will repeat step 202 until the first temperature value reaches the target threshold range.
In step 204, the control unit obtains a second temperature value detected by the second temperature sensor.
Step 2051, the control unit determines whether the second temperature value is greater than the first threshold, and if so, performs step 2061; otherwise, step 2051 is continued.
Step 2052, the control unit determines whether the second temperature value is smaller than a second threshold value, and if so, performs step 2062; otherwise, step 2052 is continued.
In this embodiment of the present application, after the control unit obtains the second temperature value detected by the second temperature sensor, on the one hand, step 2051 may be executed to determine whether the second temperature value is greater than a preset first threshold, if so, step 2061 may be further executed to detect a duration of time that the second temperature value is greater than the first threshold, and if it is determined that the duration of time is greater than the preset duration threshold, the first temperature sensor may be determined to be faulty. Alternatively, in another implementation, step 2061 may be detecting a duration of time that the second temperature value is greater than the first threshold, and in the event that the duration of time is determined to be greater than a preset time threshold, the first temperature sensor may be determined to be faulty.
On the other hand, step 2052 may be performed to determine whether the second temperature value is less than a preset second threshold, and if so, step 2062 may be further performed to detect a duration in which the second temperature value is less than the second threshold, and in the event that the duration is determined to be greater than the preset duration threshold, a second temperature sensor fault may be determined. Alternatively, in another implementation, step 2062 may be detecting a duration of time that the second temperature value is less than the second threshold, where the second temperature sensor fault may be determined if the duration of time is determined to be greater than a preset number of times threshold.
In one possible implementation, the two steps 2051 and 2052 may be performed in parallel; alternatively, in another implementation manner, two steps may be performed sequentially, and the embodiment of the present application does not limit the execution sequence of the steps 2051 and 2052.
In step 2061, the control unit determines whether the continuous length or number of times the second temperature value is greater than the first threshold exceeds a preset threshold. If the preset threshold is exceeded, executing step 2071; otherwise, step 208 is performed.
In step 2062, the control unit determines whether the continuous length or number of times the second temperature value is less than the second threshold exceeds a preset threshold. If the preset threshold is exceeded, executing step 2072; otherwise, step 208 is performed.
At step 2071, the control unit determines that the first temperature sensor is abnormal.
At step 2072, the control unit determines that the second temperature sensor is abnormal.
In step 208, the control unit determines that the fixer is normal.
In the embodiment of the application, the control unit controls the heating unit to stop heating under the condition that the first temperature sensor is abnormal or the second temperature sensor is abnormal, so that safety accidents caused by overheat of the heating unit are prevented. Meanwhile, the control unit can also generate abnormal prompt information which can be used for prompting a user that the current fixer is abnormal, and also can prompt the generation of an abnormal temperature sensor, so that maintenance personnel can conveniently and rapidly lock a fault point and timely remove the fault. The abnormality notification information may be displayed in a panel of the image forming apparatus, for example. In contrast, in the case where it is determined that neither the first temperature sensor nor the second temperature sensor is abnormal, the control unit may determine that the fixer is normal. At this time, the image forming apparatus can normally perform the image forming job.
Through the technical scheme, after the fixer enters the preheating stage, the temperature sensor is subjected to abnormal detection, the detection accuracy is improved, and the abnormal sensor can be clearly determined from the temperature sensors, so that the fixing device is convenient to maintain.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 8, the electronic device may include at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the temperature sensor abnormality detection method provided by the embodiment of the application.
The electronic device may be any one of an image forming device such as a printing device and a copying device, and may also be a PC device, and the specific form of the electronic device is not limited in this embodiment.
Fig. 8 illustrates a block diagram of an exemplary electronic device suitable for use in implementing embodiments of the application. The electronic device shown in fig. 8 is merely an example, and should not be construed as limiting the functionality and scope of use of embodiments of the present application.
As shown in fig. 8, the electronic device is in the form of a general purpose computing device. Components of an electronic device may include, but are not limited to: one or more processors 410, a memory 430, and a communication bus 440 that connects the different system components (including the memory 430 and the processor 410).
The communication bus 440 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include industry Standard architecture (Industry Standard Architecture; hereinafter ISA) bus, micro channel architecture (Micro Channel Architecture; hereinafter MAC) bus, enhanced ISA bus, video electronics standards Association (Video Electronics Standards Association; hereinafter VESA) local bus, and peripheral component interconnect (Peripheral Component Interconnection; hereinafter PCI) bus.
Electronic devices typically include a variety of computer system readable media. Such media can be any available media that can be accessed by the electronic device and includes both volatile and nonvolatile media, removable and non-removable media.
Memory 430 may include computer system readable media in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter: RAM) and/or cache memory. The electronic device may further include other removable/non-removable, volatile/nonvolatile computer system storage media. Although not shown in fig. 8, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a compact disk read only memory (Compact Disc Read Only Memory; hereinafter CD-ROM), digital versatile read only optical disk (Digital Video Disc Read Only Memory; hereinafter DVD-ROM), or other optical media) may be provided. In such cases, each drive may be coupled to communication bus 440 by one or more data medium interfaces. Memory 430 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the embodiments of the application.
A program/utility having a set (at least one) of program modules may be stored in the memory 430, such program modules including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules typically carry out the functions and/or methods of the embodiments described herein.
The electronic device may also communicate with one or more external devices (e.g., keyboard, pointing device, display, etc.), with one or more devices that enable a user to interact with the electronic device, and/or with any device (e.g., network card, modem, etc.) that enables the electronic device to communicate with one or more other computing devices. Such communication may occur through communication interface 420. Moreover, the electronic device may also communicate with one or more networks (e.g., local area network (Local Area Network; hereinafter: LAN), wide area network (Wide Area Network; hereinafter: WAN) and/or a public network, such as the Internet) via a network adapter (not shown in FIG. 8) that may communicate with other modules of the electronic device via the communication bus 440. It should be appreciated that although not shown in fig. 8, other hardware and/or software modules may be used in connection with an electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, disk arrays (Redundant Arrays of Independent Drives; hereinafter RAID) systems, tape drives, data backup storage systems, and the like.
The processor 410 executes various functional applications and data processing by running a program stored in the memory 430, for example, to implement the temperature sensor abnormality detection method provided by the embodiment of the present application.
The embodiment of the application also provides a computer readable storage medium, which stores computer instructions for causing the computer to execute the temperature sensor abnormality detection method provided by the embodiment of the application.
Any combination of one or more computer readable media may be utilized as the above-described computer readable storage media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory; EPROM) or flash Memory, an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RFID, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (Local Area Network; hereinafter: LAN) or a wide area network (Wide Area Network; hereinafter: WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.
Claims (12)
1. A temperature sensor abnormality detection method characterized by being applied to a control unit of an image forming apparatus, the control unit being connected to a fixer, the fixer including a heating unit; the method comprises the following steps:
acquiring a first temperature value detected by a first temperature sensor, wherein the first temperature sensor is positioned in the middle of the heating unit;
acquiring a second temperature value detected by a second temperature sensor when the first temperature value reaches a target threshold range, wherein the second sensor is positioned at the end part of the heating unit; the target threshold range is determined according to a threshold value of the fixer, which is switched from a first working state to a second working state;
comparing the second temperature value with a first threshold value and a second threshold value respectively;
and determining an abnormal sensor from the first temperature sensor and the second temperature sensor according to the comparison result.
2. The method of claim 1, wherein prior to obtaining the first temperature value detected by the first temperature sensor, the method further comprises:
and determining that the fixer is in a first working state, wherein the first working state is a preheating state.
3. The method of claim 2, wherein in the event that the first temperature value reaches a target threshold range, the method further comprises:
and controlling the fixer to be switched to a second working state, wherein the second working state is a standby state.
4. The method of claim 1, wherein determining an anomaly sensor from the first temperature sensor and the second temperature sensor based on the comparison result comprises:
determining whether the first temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and the first threshold value;
and determining whether the second temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and a second threshold value.
5. The method of claim 4, wherein determining whether the first temperature sensor is an anomaly sensor based on a comparison of the second temperature value and the first threshold value comprises:
determining that the first temperature sensor is an abnormal sensor if the second temperature value is greater than the first threshold value;
determining whether the second temperature sensor is an abnormal sensor according to a comparison result of the second temperature value and a second threshold value, including:
And determining that the second temperature sensor is an abnormal sensor when the second temperature value is smaller than the second threshold value.
6. The method of claim 5, wherein determining that the first temperature sensor is an anomaly sensor if the second temperature value is greater than the first threshold value comprises:
timing a time period for which the second temperature value is greater than the first threshold value, if the second temperature value is greater than the first threshold value;
detecting that the timing time exceeds a time threshold, and determining that the first temperature sensor is an abnormal sensor;
determining that the second temperature sensor is an abnormal sensor if the second temperature value is less than the second threshold value, comprising:
timing a time period for which the second temperature value is less than the second threshold value, if the second temperature value is less than the second threshold value;
and detecting that the timing duration exceeds the duration threshold, and determining that the second temperature sensor is an abnormal sensor.
7. The method of claim 5, wherein determining that the first temperature sensor is an anomaly sensor if the second temperature value is greater than the first threshold value comprises:
Counting a number of times the second temperature value is greater than the first threshold value, if the second temperature value is greater than the first threshold value;
detecting that the count value exceeds a frequency threshold value, and determining that the first temperature sensor is an abnormal sensor;
determining that the second temperature sensor is an abnormal sensor if the second temperature value is less than the second threshold value, comprising:
counting a number of times the second temperature value is less than the second threshold value, if the second temperature value is less than the second threshold value;
and detecting that the count value exceeds the frequency threshold value, and determining that the second temperature sensor is an abnormal sensor.
8. The method of claim 1, wherein the first threshold value is between a first normal temperature and a first abnormal temperature value;
the first normal temperature is a temperature value detected by the second temperature sensor after the first temperature value reaches the target threshold range in a normal state of the first temperature sensor;
the first abnormal temperature value is a temperature value detected by the second temperature sensor after the first temperature value reaches the target threshold range in the abnormal state of the first temperature sensor;
The value of the first threshold value is positively correlated with the degree of deviation between the first temperature sensor and the heating unit;
the value of the first threshold value is in positive correlation with the external input voltage and the heating unit power.
9. The method of claim 1, wherein the second threshold value is between a second normal temperature value and a second abnormal temperature value;
the second normal temperature value is a temperature value detected by the second temperature sensor in a normal state after the first temperature value reaches the target threshold range in the normal state of the first temperature sensor; the second abnormal temperature value is a temperature value detected by the second temperature sensor in an abnormal state after the first temperature value reaches the target threshold range in a normal state of the first temperature sensor;
the value of the second threshold value and the deviation degree between the second temperature sensor and the heating unit are in a negative correlation relationship;
the value of the second threshold value is in positive correlation with the external input voltage and the heating unit power.
10. The method of claim 1, wherein after determining an anomaly sensor from the first temperature sensor and the second temperature sensor based on the comparison result, the method further comprises:
And controlling the heating unit to stop heating and generating abnormal prompt information.
11. An image forming apparatus, comprising: a control unit and a fixer connected with the control unit;
the fixing device comprises a heating unit, wherein a first temperature sensor is arranged in the middle of the heating unit, and a second temperature sensor is arranged at the end part of the heating unit;
the control unit is capable of determining an anomaly sensor from the first temperature sensor and the second temperature sensor by performing the method according to any one of claims 1 to 10.
12. A computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 10.
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| CN202310995218.4A CN116893592A (en) | 2023-08-08 | 2023-08-08 | Temperature sensor abnormality detection method and image forming apparatus |
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| CN202310995218.4A CN116893592A (en) | 2023-08-08 | 2023-08-08 | Temperature sensor abnormality detection method and image forming apparatus |
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