CN-117092897-B - Control method and device of image forming equipment

CN117092897BCN 117092897 BCN117092897 BCN 117092897BCN-117092897-B

Abstract

The application provides a control method and a control device of an image forming apparatus and the image forming apparatus. The control method of the image forming device comprises the steps of obtaining a first voltage value and a state zone bit, judging whether the current voltage state is normal according to the first voltage value and the state zone bit, obtaining a first judgment result, and executing voltage reduction processing when the first judgment result indicates that the current voltage state is abnormal. The control method of the application determines that the current voltage state is abnormal through the indication of the state zone bit, namely, the voltage reduction processing is executed, so that the problem that the voltage is influenced by the change of the resistance value of the transfer roller due to the environment and the use state of the transfer roller, and the image quality is influenced can be solved.

Inventors

SHAO ZHE
CHEN SHIQUAN
Qin Chaomei
LIU LU

Assignees

珠海奔图电子有限公司

Dates

Publication Date: 20260508
Application Date: 20230831
Priority Date: 20230104

Claims (12)

1. A control method of an image forming apparatus, characterized by comprising: Acquiring a first voltage value and a state flag bit, wherein the first voltage value is obtained by starting an image forming device with a preset voltage, reading the voltage value for a plurality of times within a certain period, calculating the average value of the voltage values read for a plurality of times, determining the average value of the voltage values read for a plurality of times as the first voltage value, or determining the first voltage value as a pre-stored voltage value, or determining the first voltage value as a detected and acquired voltage value; judging whether the current voltage state is normal or not according to the first voltage value and the state flag bit, and acquiring a first judgment result; When the first judgment result indicates that the current voltage state is abnormal, performing voltage reduction processing to obtain a second voltage value; the first judgment result indicates that the current voltage state is abnormal comprises: the first voltage value and the status flag bit do not satisfy that the first voltage value does not exceed a first threshold voltage and the status flag bit marks normal, or The first voltage value and the state zone bit meet any condition that the first voltage value is not lower than a first threshold voltage and the state zone bit marks that the current voltage state is abnormal; the performing the voltage reduction process to obtain a second voltage value includes: reducing the first voltage value according to a preset rule to obtain a second voltage value; The predetermined rule includes decreasing the first voltage value by a nominal voltage value based on the first voltage value or, And reducing the first voltage value according to the mapping relation between the voltage difference value and the voltage reduction amplitude based on the voltage difference value between the first voltage value and the first threshold voltage, wherein the mapping relation between the voltage difference value and the voltage reduction amplitude is prestored in a memory.
2. The control method according to any one of claim 1, wherein the performing the voltage-decreasing process to obtain the second voltage value further comprises: determining whether the second voltage value satisfies a condition that a second threshold voltage value is not exceeded; When it is determined that the second voltage value does not satisfy the condition of not exceeding the second threshold voltage value, the image forming operation is continued without changing the second voltage value.
3. The control method according to claim 1, wherein the performing the voltage-decreasing process to obtain the second voltage value further includes: based on the second voltage value, reading the voltage value for a plurality of times within a certain period of time, and calculating an average value of the voltage values read for a plurality of times as a third voltage value; determining whether the third voltage value satisfies a condition that the second threshold voltage value is not exceeded; When the third voltage value is determined not to meet the condition that the third voltage value does not exceed the second threshold voltage value, a state zone bit is obtained, whether the state zone bit identifies that the current voltage state is normal or not is judged, and a second judgment result is obtained; When the second judgment result indicates that the current voltage state is abnormal, calculating a current load and a load current, calculating a load voltage based on the load and the load current, and obtaining the load voltage value; and judging whether the load voltage value is not smaller than a third threshold voltage or not, obtaining a third judging result, and continuously executing the image forming operation without changing the second voltage value when the third judging result indicates that the load voltage is not smaller than the third threshold voltage.
4. The control method according to claim 1, characterized in that, when the first determination result indicates that the current voltage state is abnormal, before performing the voltage reduction process, comprising: Judging whether the first voltage value exceeds a fourth threshold voltage, and determining that the current voltage state indicates at least one state of overcurrent or overload or overcurrent and overload; Determining that the current voltage state indicates an overload state when the first voltage value does not exceed the fourth threshold voltage; when the first voltage value exceeds the fourth threshold voltage, it is determined that the current voltage state indicates at least one of an overcurrent or overload or both.
5. A control device of an image forming apparatus, characterized by comprising: The image forming device comprises a first acquisition unit, a second acquisition unit and a state flag bit, wherein the first voltage value is obtained by starting the image forming device with a preset voltage, reading the voltage value for a plurality of times within a certain period, calculating the average value of the voltage values read for a plurality of times, determining the average value as the first voltage value, or determining the first voltage value as a pre-stored voltage value, or determining the first voltage value as a detected and acquired voltage value; the first judging unit judges whether the current voltage state is normal or not according to the first voltage value and the state flag bit, and a first judging result is obtained; A voltage reduction unit that performs voltage reduction processing when the first determination result indicates that the current voltage state is abnormal; the first judgment result indicates that the current voltage state is abnormal comprises: the first voltage value and the status flag bit do not satisfy that the first voltage value does not exceed a first threshold voltage and the status flag bit marks normal, or The first voltage value and the state flag bit meet any condition that the first voltage value is not lower than a first threshold voltage and the state flag bit determines that the current voltage state is abnormal; the voltage reduction unit is further configured to reduce the first voltage value according to a predetermined rule, and includes: A first step-down unit that reduces the first voltage value by a rated voltage value based on the first voltage value; And the second voltage reducing unit is used for reducing the first voltage value according to the mapping relation between the voltage difference value and the voltage reduction amplitude based on the voltage difference value between the first voltage value and the first threshold voltage, and the mapping relation between the voltage difference value and the voltage reduction amplitude is prestored in a memory.
6. The apparatus of claim 5, wherein the control means further comprises: A first determination unit that determines whether a second voltage value satisfies a condition that the second threshold voltage value is not exceeded, and when it is determined that the second voltage value does not satisfy the condition that the second threshold voltage value is not exceeded, does not change the second voltage value, and continues to perform an image forming operation; and a third judging unit for judging whether the load voltage value is not less than a third threshold voltage, obtaining a third judging result, and when the third judging result indicates that the load voltage is not less than the third threshold voltage, not changing the second voltage value, and continuing to execute the image forming operation.
7. The apparatus of claim 5, wherein the depressurization unit further comprises: A first calculation unit that reads the voltage value a plurality of times in a predetermined period with respect to a predetermined time based on the second voltage value, and calculates an average value of the plurality of read voltage values as a third voltage value; a second obtaining unit that obtains a status flag bit when it is determined that the second voltage value does not satisfy a condition that the second threshold voltage value is not exceeded; the second judging unit is used for judging whether the state flag bit indicates that the current voltage state is normal or not, and obtaining a second judging result; And the second calculating unit is used for calculating the current load and the load current when the second judging result indicates that the current voltage state is abnormal, calculating the load voltage based on the load and the load current and obtaining a load voltage value.
8. The apparatus of claim 5, wherein the control means further comprises: And a fourth judging unit for judging whether the first voltage value exceeds a fourth threshold voltage, when the first voltage value exceeds the fourth threshold voltage, determining that the current voltage state indicates at least one of overcurrent or overload or overcurrent and overload, and when the first voltage value does not exceed the fourth threshold voltage, determining that the current voltage state indicates an overload state.
9. The apparatus of claim 5, wherein the first acquisition unit further comprises: And a third calculation unit that turns on the image forming apparatus at a predetermined voltage, reads the voltage value a plurality of times with a predetermined time in a certain period, calculates an average value of the plurality of read voltage values, and determines the average value as the first voltage value.
10. A control device of an image forming apparatus, characterized by comprising: A third acquiring unit that acquires a status flag bit that identifies that a current voltage state of the image forming apparatus is at least one of a normal state or an abnormal state; The third acquisition unit comprises a first conduction element, a second conduction element, a first load element, a second load element, a third load element and a state identification acquisition port, wherein one end of the first conduction element is connected with current, the other end of the first conduction element is connected with one end of the first load element, the other end of the first load element is connected with the first end of the second conduction element and one end of the second load element, the second end of the second conduction element is grounded with the other end of the second load element, the third end of the second conduction element is connected with one end of the third load element, the other end of the third load element is connected with voltage, and the state identification acquisition port is connected to any position between the third end of the second conduction element and the other end of the third load resistor; And the voltage reducing unit is used for judging whether the current voltage state is normal or not according to the state flag bit, acquiring a fourth judgment result, and executing voltage reducing processing when the fourth judgment result indicates that the current voltage state is abnormal.
11. An image forming apparatus, comprising a memory, a processor, and a computer program; wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of claims 1-4.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when executed, implements the steps of the method according to any one of claims 1-4.

Description

Control method and device of image forming equipment Technical Field The present application relates to a control method of an image forming apparatus and an image forming apparatus, and more particularly, to a method and an apparatus for controlling a voltage control of an image forming apparatus before or during the start of image formation. Background In an image forming apparatus employing an electrophotographic method or an electrostatic recording method, a toner image formed on a surface of a photosensitive drum is transferred onto a sheet as a recording medium, so that an image is recorded on the sheet. Generally, with respect to transfer of a toner image, in one case, toner on the surface of a photosensitive drum is electrostatically transferred onto a sheet by applying a bias to a transfer roller while the sheet is conveyed by being pressed between the photosensitive drum and the transfer roller. In another case, the toner image formed on the surface of the photosensitive drum is transferred onto the transfer belt, and further the toner image on the transfer belt is transferred onto the sheet, and the toner on the surface of the transfer belt is electrostatically transferred onto the sheet by applying a bias to the transfer roller while the sheet is conveyed by being nip-pressed between the transfer belt and the transfer roller. However, in transferring a toner image onto a sheet, the resistance of the transfer roller varies depending on the environment (temperature and humidity) of the image forming apparatus and its use due to the physical characteristics of the transfer roller itself, thus affecting the actual bias applied to the transfer roller and thus the image quality. Disclosure of Invention The embodiment of the application provides a control method of an image forming device and the image forming device, which can solve the problem that the image quality is affected due to the change of resistance value of a transfer roller caused by the environment in which the transfer roller is positioned and the use state of the transfer roller. In a first aspect, an embodiment of the present application provides a control method for an image forming apparatus, including obtaining a first voltage value and a status flag, determining whether a current voltage state is normal according to the first voltage value and the status flag, obtaining a first determination result, and performing voltage reduction processing when the first determination result indicates that the current voltage state is abnormal, to obtain a second voltage value. In one embodiment, the first judgment result indicates that the current voltage state is abnormal includes that the first voltage value and the state flag bit do not meet the condition that the first voltage value does not exceed a first threshold voltage and the state flag bit is identified as normal, or that the first voltage value and the state flag bit meet the condition that the first voltage value is not lower than the first threshold voltage and the state flag bit is identified as any one of abnormality. In one embodiment, the performing the voltage reduction processing to obtain the second voltage value includes reducing the first voltage value according to a predetermined rule to obtain the second voltage value, wherein the predetermined rule includes reducing the first voltage value by a rated voltage value based on the first voltage value, or reducing the first voltage value according to a mapping relationship between the voltage difference and a voltage reduction amplitude based on a voltage difference between the first voltage value and the first threshold voltage, and the mapping relationship between the voltage difference and the voltage reduction amplitude is stored in a memory in advance. In one embodiment, the step of performing the voltage reduction process further includes determining whether the second voltage value satisfies a condition that the second voltage value does not exceed a second threshold voltage value, and continuing to perform the image forming operation without changing the second voltage value when it is determined that the second voltage value does not satisfy the condition that the second threshold voltage value is not exceeded. In one embodiment, the performing the voltage reduction processing further includes, based on the second voltage value, reading the voltage value a plurality of times within a certain period, each time, for a predetermined time, calculating an average value of the plurality of times as a third voltage value, determining whether the third voltage value satisfies a condition that the second threshold voltage value is not exceeded, acquiring a status flag bit when it is determined that the third voltage value does not satisfy the condition that the second threshold voltage value is not exceeded, judging whether the status flag bit identifies that the current voltage state is normal, obtaining a second judgment