CN112904113B - Method and device for detecting overload of brake resistor - Google Patents
Method and device for detecting overload of brake resistor Download PDFInfo
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- CN112904113B CN112904113B CN202110069647.XA CN202110069647A CN112904113B CN 112904113 B CN112904113 B CN 112904113B CN 202110069647 A CN202110069647 A CN 202110069647A CN 112904113 B CN112904113 B CN 112904113B
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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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- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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Abstract
The application is suitable for the technical field of resistance detection, and provides a method for detecting overload of a brake resistor, which comprises the following steps: if the brake resistor is detected to be in a working state, acquiring bus voltage, rated power and resistance value of the brake resistor, and determining the overload multiple of the brake resistor according to the rated power, the resistance value and the bus voltage; calculating the overload integral of the brake resistor according to the overload multiple; and if the overload integral is larger than a first integral threshold value, judging that the brake resistor is overloaded. According to the method, the overload integral is directly calculated through the overload multiple, so that whether the brake resistor is overloaded or not is judged, and the brake resistor can be protected without additionally installing a temperature sensor on the brake resistor. The hardware is simplified, and the cost is reduced.
Description
Technical Field
The application belongs to the technical field of resistance detection, and particularly relates to a method and equipment for detecting overload of a brake resistor.
Background
In the servo application, when the deceleration time of the servo is short, the motor is changed from an electric state to a power generation state in the deceleration process. At the moment, the current is fed back to the direct current bus through the freewheeling diode, and because the electric energy of the direct current circuit cannot be fed back to the power grid through the rectifier bridge, although other parts can consume the electric energy, the capacitor still has short-time charge accumulation to form pumping voltage, so that the direct current voltage is increased. The bus capacitance will be compromised by the excessive dc voltage. In order to protect the bus capacitor in a power generation state, the bus capacitor is generally protected by reducing the bus voltage by heating the brake resistor on site. However, many brake resistors of servo drivers are in the market, and the brake resistors are easy to damage due to improper overload protection methods.
At present, the overload of the brake resistor is mainly detected by detecting the temperature of the brake resistor so as to judge whether the brake resistor is overloaded, however, the method needs to install a temperature sensor on the brake resistor, and has complex hardware and high cost.
Disclosure of Invention
The embodiment of the application provides a method and equipment for detecting overload of a brake resistor, and the problems that a temperature sensor needs to be installed on the brake resistor when the overload of the brake resistor is detected at present, hardware is complex, and cost is high can be solved.
In a first aspect, an embodiment of the present application provides a method for detecting overload of a brake resistor, including:
if the brake resistor is detected to be in a working state, acquiring bus voltage, rated power and resistance value of the brake resistor;
determining the overload multiple of the brake resistor according to the rated power, the resistance value and the bus voltage;
calculating the overload integral of the brake resistor according to the overload multiple;
and if the overload integral is larger than a first integral threshold value, judging that the brake resistor is overloaded.
Further, the calculating an overload integral of the brake resistor according to the overload multiple includes:
determining the value of an overload flag bit of the brake resistor according to the overload multiple;
and if the value of the overload flag bit is a first numerical value and the overload multiple is greater than or equal to 1, calculating the actual value of the overload integral according to the initial value of the overload integral and the overload multiple.
Further, the calculating an overload integral of the brake resistor according to the overload multiple further includes:
and if the value of the overload flag bit is a first numerical value and the overload multiple is less than 1, resetting the initial value of the overload integral to zero.
Further, after the determining the value of the overload flag of the braking resistor according to the overload multiple, the method further includes:
if the value of the overload flag bit is a second value, acquiring bus voltage;
and if the initial value of the overload integral is greater than a second integral threshold value and the bus voltage is less than a voltage threshold value, calculating the actual value of the overload integral according to the initial value, the bus voltage and a preset brake voltage.
Further, after the acquiring the bus voltage, the method further includes:
and if the initial value of the overload integral is less than or equal to a second integral threshold value, or the bus voltage is greater than or equal to a voltage threshold value, calculating the actual value of the overload integral according to the initial value of the overload integral and a preset integral parameter.
Further, the determining the value of the overload flag of the brake resistor according to the overload multiple includes:
and if the overload multiple is greater than or equal to 1, setting the value of the overload flag bit of the brake resistor as a first numerical value.
Further, the determining the value of the overload flag of the brake resistor according to the overload multiple further includes:
determining continuous non-overload time according to the overload multiple;
and if the continuous non-overload time is longer than the preset time, setting the value of the overload flag bit of the brake resistor as a second numerical value.
Further, the method further comprises:
if the brake resistor is detected to be in a working state, recording the brake time of the brake resistor;
after determining the overload multiple of the brake resistor according to the current power, the rated power and the resistance value, the method further comprises the following steps:
acquiring a preset braking time threshold corresponding to the overload multiple;
and if the braking time is greater than the preset braking time threshold value, judging that the braking resistor is overloaded.
In a second aspect, an embodiment of the present application provides an apparatus for detecting overload of a brake resistor, including:
the first processing unit is used for acquiring bus voltage, rated power and resistance value of the brake resistor if the brake resistor is detected to be in a working state;
the determining unit is used for determining the overload multiple of the braking resistor according to the rated power, the resistance value and the bus voltage;
the calculating unit is used for calculating the overload integral of the brake resistor according to the overload multiple;
and the second processing unit is used for judging that the brake resistor is overloaded if the overload integral is greater than a first integral threshold value.
Further, the computing unit is specifically configured to:
determining the value of an overload flag bit of the brake resistor according to the overload multiple;
and if the value of the overload flag bit is a first numerical value and the overload multiple is greater than or equal to 1, calculating the actual value of the overload integral according to the initial value of the overload integral and the overload multiple.
Further, the computing unit is specifically further configured to:
and if the value of the overload flag bit is a first numerical value and the overload multiple is less than 1, resetting the initial value of the overload integral to zero.
Further, the computing unit is specifically further configured to:
if the value of the overload flag bit is a second value, acquiring bus voltage;
and if the initial value of the overload integral is greater than a second integral threshold value and the bus voltage is less than a voltage threshold value, calculating the actual value of the overload integral according to the initial value, the bus voltage and a preset brake voltage.
Further, the computing unit is specifically further configured to:
and if the initial value of the overload integral is smaller than or equal to a second integral threshold value, or the bus voltage is larger than or equal to a voltage threshold value, calculating the actual value of the overload integral according to the initial value of the overload integral and a preset integral parameter.
Further, the computing unit is specifically further configured to:
and if the overload multiple is greater than or equal to 1, setting the value of the overload flag bit of the brake resistor as a first numerical value.
Further, the computing unit is specifically further configured to:
determining continuous non-overload time according to the overload multiple;
and if the continuous non-overload time is longer than the preset time, setting the value of the overload flag bit of the brake resistor as a second numerical value.
Further, the device for detecting overload of the brake resistor further comprises:
the recording unit is used for recording the braking time of the braking resistor if the braking resistor is detected to be in a working state;
the acquiring unit is used for acquiring a preset braking time threshold corresponding to the overload multiple;
and the third processing unit is used for judging that the braking resistor is overloaded if the braking time is greater than the preset braking time threshold value.
In a third aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor, when executing the computer program, implements the method for detecting a brake resistance overload according to the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the method for detecting a brake resistance overload according to the first aspect.
In the embodiment of the application, if the brake resistor is detected to be in a working state, bus voltage, rated power and resistance value of the brake resistor are obtained, and overload multiple of the brake resistor is determined according to the rated power, the resistance value and the bus voltage; calculating the overload integral of the brake resistor according to the overload multiple; and if the overload integral is larger than a first integral threshold value, judging that the brake resistor is overloaded. According to the method, the overload integral is directly calculated through the overload multiple, so that whether the brake resistor is overloaded or not is judged, and the brake resistor can be protected without additionally installing a temperature sensor on the brake resistor. The hardware is simplified, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart diagram of a method for detecting brake resistor overload provided in a first embodiment of the present application;
FIG. 2 is a schematic diagram of an apparatus for detecting brake resistor overload according to a second embodiment of the present application;
fig. 3 is a schematic diagram of an apparatus for detecting an overload of a brake resistor according to a third embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for detecting an overload of a brake resistor according to a first embodiment of the present application. The execution subject of the method for detecting the overload of the brake resistor in the embodiment is a device with a function of detecting the overload of the brake resistor, such as a desktop computer, a server, and the like. The method of detecting a brake resistor overload as shown in fig. 1 may include:
s101: and if the brake resistor is detected to be in a working state, acquiring the bus voltage, the rated power and the resistance value of the brake resistor.
In this embodiment, bus voltage needs to be detected in real time, and bus voltage can be detected in a resistance voltage division manner, and then accurate bus voltage is obtained through software filtering. The brake resistor is used for protecting the bus capacitor in a power generation state, and when the bus voltage exceeds a preset voltage threshold value, the brake pipe needs to be started to control the brake resistor to start working.
And if the brake resistor is detected to be in a working state, acquiring the bus voltage, the power of the brake resistor and the resistance value of the resistor. The rated power and the resistance value of the brake resistor are preset parameters of the brake resistor and are generally marked on a label of the brake resistor.
S102: and determining the overload multiple of the brake resistor according to the rated power, the resistance value of the resistor and the bus voltage.
The device determines the overload multiple of the brake resistor according to the rated power, the resistance value of the resistor and the bus voltage. The overload multiple of the brake resistor is the multiple of the current power of the brake resistor and the rated power of the brake resistor.
Specifically, a calculation formula of the overload multiple is preset in the equipment, and the overload multiple of the brake resistor is calculated by the equipment according to the calculation formula of the rated power, the resistance value of the resistor, the bus voltage and the preset overload multiple. The formula for calculating the overload multiple can be:
n＝(V*V)/(P*R)
wherein n is the overload multiple, V is the bus voltage, P is the rated power, and R is the resistance value of the resistor.
S103: and calculating the overload integral of the brake resistor according to the overload multiple.
The device stores the calculation rule of the overload integral in advance, and the device calculates the overload integral of the brake resistor according to the calculation rule and the overload multiple. Wherein the overload integral is used to determine whether the overload resistor is overloaded.
In one embodiment, the device determines the value of the overload flag of the brake resistor based on the overload factor. And if the value of the overload flag bit is a first numerical value and the overload multiple is greater than or equal to 1, calculating the actual value of the overload integral according to the initial value of the overload integral and the overload multiple.
The device calculates the actual value of the overload integral according to the initial value of the overload integral and the overload multiple, wherein the initial value of the overload integral is the value of the overload integral obtained by the last calculation. The device calculates the actual value of the overload integral according to the initial value of the overload integral and the overload multiple, and can add the initial value of the overload integral and the square of the overload multiple to obtain the actual value of the overload integral.
The value of the overload flag bit of the brake resistor is determined according to the overload multiple, and specifically, if the overload multiple is greater than or equal to 1, the value of the overload flag bit of the brake resistor is set to a first value. If the overload multiple is larger than or equal to 1, the current brake resistor is overloaded, the value of the overload flag bit of the brake resistor is set to be a first value, and the first value marks the overload of the current brake resistor.
And determining continuous non-overload time according to the overload multiple, namely adding 1 to the continuous non-overload time if the overload multiple is less than 1, and setting the value of the overload flag bit of the brake resistor to be a second value if the continuous non-overload time is greater than the preset time. And if the continuous non-overload time is longer than the preset time length, the current brake resistor is not overloaded within the preset time length, the value of the overload flag bit of the brake resistor is set as a second numerical value, and the second numerical value marks that the current brake resistor is not overloaded.
In one embodiment, if the value of the overload flag is the first value and the overload multiple is less than 1, the initial value of the overload integral is zeroed. Because the value of the overload flag bit is not updated in real time, if the value of the overload flag bit is the first value, the first value marks that the current brake resistor is overloaded, but the overload multiple is less than 1, which means that the current brake resistor is not overloaded, and the judgment is not performed through overload integral, so that the initial value of the overload integral returns to zero.
In one embodiment, if the value of the overload flag is the second value, the bus voltage is obtained, and at this time, the bus voltage, that is, the real-time voltage, needs to be obtained again. And if the initial value of the overload integral is greater than a second integral threshold value and the bus voltage is less than a voltage threshold value, calculating the actual value of the overload integral according to the initial value, the bus voltage and a preset brake voltage. For example, if the second integration threshold is set to 20, the initial value of the overload integration is greater than 20, and the bus voltage is less than the voltage threshold, then the actual value of the overload integration is calculated according to the initial value, the bus voltage, and the preset brake voltage, where the actual value of the overload integration may be:
OverLMulIntegra＝OverLMulIntegra’-5-((V1-V0)/20)
wherein, overlamulintegra is an actual value of the overload integral, overlamulintegra' is an initial value, V1 is a preset brake voltage, V0 is a bus voltage, and 5 can be a preset parameter.
And if the initial value of the overload integral is smaller than or equal to the second integral threshold value or the bus voltage is larger than or equal to the voltage threshold value, calculating the actual value of the overload integral according to the initial value of the overload integral and a preset integral parameter. For example, the actual value of the overload integral may be:
OverLMulIntegra＝OverLMulIntegra’–5
wherein, overlamulintegra is an actual value of the overload integral, overlamulintegra' is an initial value, and 5 may be a preset parameter.
S104: and if the overload integral is larger than a first integral threshold value, judging that the brake resistor is overloaded.
A first integral threshold value is preset in the device, and if the overload integral is larger than the first integral threshold value, the brake resistor is judged to be overloaded. It should be noted that, when it is determined that the brake resistor is overloaded, a warning prompt needs to be performed to protect the brake resistor. The protection mode can be that the outage is stopped for half an hour for waiting for the brake resistor to cool down.
In one embodiment, if the brake resistor is detected to be in the working state, the brake time of the brake resistor is recorded. The braking time is the working time of the braking resistor, and the braking time can also be used for judging whether the braking resistor is overloaded or not.
After the device determines the overload multiple of the braking resistor, the device may obtain a preset braking time threshold corresponding to the overload multiple. Specifically, the device presets a corresponding relationship between each overload multiple of a brake resistor and a preset brake time threshold. And after the equipment calculates the overload multiple, determining a preset braking time threshold corresponding to the overload multiple according to the corresponding relation between the overload multiple and the preset braking time threshold. And if the braking time is greater than a preset braking time threshold value, judging that the braking resistor is overloaded.
It should be noted that, the two ways of judging whether the braking resistor is overloaded or not by the device through the overload integration and the braking time may be in an or relationship. That is, the device may determine whether the braking resistor is overloaded by the overload integration or the braking time.
In the embodiment of the application, if the brake resistor is detected to be in a working state, bus voltage, rated power and resistance value of the brake resistor are obtained, and overload multiple of the brake resistor is determined according to the rated power, the resistance value and the bus voltage; calculating the overload integral of the brake resistor according to the overload multiple; and if the overload integral is larger than a first integral threshold value, judging that the brake resistor is overloaded. According to the method, the overload integral is directly calculated through the overload multiple, so that whether the brake resistor is overloaded or not is judged, and the brake resistor can be protected without additionally installing a temperature sensor on the brake resistor. The hardware is simplified, and the cost is reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Referring to fig. 2, fig. 2 is a schematic diagram of a device for detecting overload of a brake resistor according to a second embodiment of the present application. The units are included for performing the steps in the corresponding embodiment of fig. 1. Please refer to fig. 1 for the related description of the corresponding embodiment. For convenience of explanation, only the portions related to the present embodiment are shown. Referring to fig. 2, the apparatus 2 for detecting overload of the brake resistor includes:
the first processing unit 210 is configured to obtain a bus voltage, a rated power of the brake resistor, and a resistor resistance value if it is detected that the brake resistor is in a working state;
the determining unit 220 is configured to determine an overload multiple of the braking resistor according to the rated power, the resistance value and the bus voltage;
a calculating unit 230, configured to calculate an overload integral of the brake resistor according to the overload multiple;
a second processing unit 240, configured to determine that the braking resistor is overloaded if the overload integral is greater than a first integral threshold.
Further, the calculating unit 230 is specifically configured to:
determining the value of an overload flag bit of the brake resistor according to the overload multiple;
and if the value of the overload flag bit is a first numerical value and the overload multiple is greater than or equal to 1, calculating the actual value of the overload integral according to the initial value of the overload integral and the overload multiple.
Further, the calculating unit 230 is specifically further configured to:
and if the value of the overload flag bit is a first numerical value and the overload multiple is less than 1, resetting the initial value of the overload integral to zero.
Further, the calculating unit 230 is specifically further configured to:
if the value of the overload flag bit is a second value, acquiring bus voltage;
and if the initial value of the overload integral is greater than a second integral threshold value and the bus voltage is less than a voltage threshold value, calculating the actual value of the overload integral according to the initial value, the bus voltage and a preset brake voltage.
Further, the calculating unit 230 is specifically further configured to:
and if the initial value of the overload integral is smaller than or equal to a second integral threshold value, or the bus voltage is larger than or equal to a voltage threshold value, calculating the actual value of the overload integral according to the initial value of the overload integral and a preset integral parameter.
Further, the calculating unit 230 is specifically further configured to:
and if the overload multiple is greater than or equal to 1, setting the value of the overload flag bit of the brake resistor as a first numerical value.
Further, the calculating unit 230 is specifically further configured to:
determining continuous non-overload time according to the overload multiple;
and if the continuous non-overload time is longer than the preset time, setting the value of the overload flag bit of the brake resistor as a second numerical value.
Further, the device 2 for detecting overload of the brake resistor further comprises:
the recording unit is used for recording the braking time of the braking resistor if the braking resistor is detected to be in a working state;
the acquiring unit is used for acquiring a preset braking time threshold corresponding to the overload multiple;
and the third processing unit is used for judging that the braking resistor is overloaded if the braking time is greater than the preset braking time threshold value.
Fig. 3 is a schematic diagram of an apparatus for detecting an overload of a brake resistor according to a third embodiment of the present application. As shown in fig. 3, the apparatus 3 for detecting an overload of a brake resistor of this embodiment includes: a processor 30, a memory 31 and a computer program 32 stored in said memory 31 and executable on said processor 30, such as a program for detecting an overload of a brake resistor. The processor 30, when executing the computer program 32, implements the steps in the various above-described method embodiments of detecting an overload of a brake resistor, such as the steps 101 to 104 shown in fig. 1. Alternatively, the processor 30, when executing the computer program 32, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 210 to 240 shown in fig. 2.
Illustratively, the computer program 32 may be partitioned into one or more modules/units that are stored in the memory 31 and executed by the processor 30 to accomplish the present application. Said one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of said computer program 32 in said device 3 for detecting an overload of a brake resistor. For example, the computer program 32 may be divided into a first processing unit, a determining unit, a calculating unit, and a second processing unit, and each unit has the following specific functions:
the first processing unit is used for acquiring bus voltage, rated power and resistance value of the brake resistor if the brake resistor is detected to be in a working state;
the determining unit is used for determining the overload multiple of the brake resistor according to the rated power, the resistance value and the bus voltage;
the calculating unit is used for calculating the overload integral of the brake resistor according to the overload multiple;
and the second processing unit is used for judging that the brake resistor is overloaded if the overload integral is greater than a first integral threshold value.
The device for detecting overload of the brake resistor may include, but is not limited to, a processor 30 and a memory 31. It will be understood by those skilled in the art that fig. 3 is merely an example of the device 3 for detecting an overload of the brake resistor, and does not constitute a limitation of the device 3 for detecting an overload of the brake resistor, and may comprise more or less components than those shown, or some components in combination, or different components, for example, the device for detecting an overload of the brake resistor may further comprise an input-output device, a network access device, a bus, etc.
The Processor 30 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 31 may be an internal storage unit of the device 3 for detecting overload of the brake resistor, for example a hard disk or a memory of the device 3 for detecting overload of the brake resistor. The memory 31 may also be an external storage device of the device 3 for detecting overload of the brake resistor, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, provided on the device 3 for detecting overload of the brake resistor. Further, the device 3 for detecting an overload of the brake resistor may also comprise both an internal memory unit and an external memory device of the device 3 for detecting an overload of the brake resistor. The memory 31 is used to store the computer program and other programs and data required by the device for detecting an overload of the brake resistor. The memory 31 may also be used to temporarily store data that has been output or is to be output.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.
It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the apparatus may be divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
An embodiment of the present application further provides a face alignment apparatus, including: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps of any of the various method embodiments described above when executing the computer program.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In some jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and proprietary practices.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other ways. For example, the above-described apparatus/device embodiments are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may exist in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (8)
1. A method of detecting brake resistor overload, comprising:
if the brake resistor is detected to be in a working state, acquiring bus voltage, rated power and resistance value of the brake resistor;
determining the overload multiple of the brake resistor according to the rated power, the resistance value and the bus voltage;
calculating the overload integral of the brake resistor according to the overload multiple;
wherein, the calculating the overload integral of the brake resistor according to the overload multiple comprises:
determining the value of an overload flag bit of the brake resistor according to the overload multiple;
if the value of the overload flag bit is a second value, acquiring bus voltage; wherein the second value indicates that the current brake resistance is not overloaded;
if the initial value of the overload integral is larger than a second integral threshold value and the bus voltage is smaller than a voltage threshold value, calculating an actual value of the overload integral according to the initial value, the bus voltage and a preset brake voltage;
if the value of the overload flag bit is a first numerical value and the overload multiple is greater than or equal to 1, calculating the actual value of the overload integral according to the initial value of the overload integral and the overload multiple; wherein the first value indicates that the current brake resistance is overloaded;
and if the overload integral is larger than a first integral threshold value, judging that the brake resistor is overloaded.
2. The method of detecting brake resistor overload of claim 1, wherein calculating an overload integral for a brake resistor based on the overload multiple further comprises:
if the value of the overload flag bit is a first numerical value and the overload multiple is less than 1, resetting the initial value of the overload integral to zero; wherein, the value of the overload flag bit is information updated in non-real time; the overload multiple is smaller than 1, the brake resistor is not overloaded at present, and whether the brake resistor is overloaded or not is judged without the overload integral.
3. The method of detecting a brake resistor overload according to claim 1, further comprising, after the obtaining a bus voltage:
and if the initial value of the overload integral is smaller than or equal to a second integral threshold value, or the bus voltage is larger than or equal to a voltage threshold value, calculating the actual value of the overload integral according to the initial value of the overload integral and a preset integral parameter.
4. The method for detecting brake resistor overload according to claim 1, wherein the determining the value of the overload flag bit of the brake resistor according to the overload multiple comprises:
and if the overload multiple is greater than or equal to 1, setting the value of the overload flag bit of the brake resistor as a first numerical value.
5. The method for detecting an overload of a brake resistor according to claim 4, wherein the determining the value of the overload flag of the brake resistor according to the overload multiple further comprises:
determining continuous non-overload time according to the overload multiple;
and if the continuous non-overload time is longer than the preset time, setting the value of the overload flag bit of the brake resistor as a second numerical value.
6. The method of detecting brake resistor overload of claim 1, further comprising:
if the brake resistor is detected to be in a working state, recording the brake time of the brake resistor;
after determining the overload multiple of the brake resistor according to the current power, the rated power and the resistance value, the method further comprises the following steps:
acquiring a preset braking time threshold corresponding to the overload multiple;
and if the braking time is greater than the preset braking time threshold value, judging that the braking resistor is overloaded.
7. An apparatus for detecting an overload of a brake resistor, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 6 when executing the computer program.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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| CN202110069647.XA CN112904113B (en) | 2021-01-19 | 2021-01-19 | Method and device for detecting overload of brake resistor |
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| CN202110069647.XA CN112904113B (en) | 2021-01-19 | 2021-01-19 | Method and device for detecting overload of brake resistor |
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| CN113612421A (en) * | 2021-08-03 | 2021-11-05 | 珠海格力电器股份有限公司 | Braking circuit control method and device, storage medium and servo motor |
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