Detection method and related equipment

Abstract

The invention provides a detection method and related equipment. The detection method comprises the following steps: acquiring a working state of the electric equipment; if the electric equipment is in the cutting state, the working current and the cutting duration of the electric equipment are obtained; and determining the passivation state of the electric equipment based on the working current and the cutting duration. When the electric equipment is in the cutting state, passivation detection is carried out on the electric equipment according to the actually detected working current and cutting duration, the passivation state of the electric equipment can be reflected timely and accurately, a user is reminded to change a new state in time, and therefore the working efficiency of the user is improved, and the safety risk of the user is reduced.

Description

Technical Field

[0001] This application relates to the field of power tools, and more particularly to a testing method and related equipment. Background Technology

[0002] Power tools are handheld or portable mechanized tools that use an electric motor or electromagnet as power and drive a working head through a transmission mechanism to perform operations. There are many types of power tools, including electric drills, electric saws, grinders, screwdrivers, etc., which can meet various work needs and significantly improve work efficiency.

[0003] Power tools can operate on objects, performing operations such as cutting, grinding, and rotating. During use, the working head of a power tool will generate friction with the object, gradually becoming dull or worn. A dull working head will encounter greater resistance when operating on an object, which not only reduces work efficiency but may also cause damage to the object or loss of control of the power tool due to the increased resistance, thus increasing safety risks.

[0004] Users often find it difficult to accurately assess the condition of chainsaws visually, leading to power tools frequently operating in a dulled or worn state. This not only reduces user efficiency but also increases safety risks. Summary of the Invention

[0005] To address the problems in the prior art, this application provides a detection method and related equipment to improve the working efficiency of electric equipment.

[0006] This application provides a detection method applied to an electric device, the electric device including a working part and a gripping part, the working part being used to cut an object, the detection method comprising:

[0007] Obtain the operating status of the electric equipment;

[0008] If the working status of the electric device indicates that the electric device is in the cutting state, the operating parameters of the electric device are obtained. The operating parameters include at least: operating current, cutting time and pressure detected by the gripping part.

[0009] Based on the operating parameters and preset parameters, the passivation state of the working component is determined.

[0010] In one embodiment, obtaining the operating state of the electric device includes:

[0011] Obtain the operating current of the electric device;

[0012] If the operating current is greater than the first preset current, the electric device is determined to be in a cutting state; the first preset current is greater than or equal to the no-load current of the electric device.

[0013] In one embodiment, the operating parameters further include the operating voltage. Based on the operating parameters and preset parameters, determining the passivation state of the working component includes:

[0014] The output power consumption of the electric device is obtained by integrating the product of the operating current and the operating voltage over the cutting time.

[0015] Calculate the quotient of the output power consumption and the cutting time to determine the average power of the electric device;

[0016] Calculate the quotient of the average power and the output power consumption to determine the passivation characteristic value of the electric device;

[0017] If the passivation feature value is less than the preset feature value, it is determined that the working component has been passivated.

[0018] In one embodiment, the detection method further includes:

[0019] Identify the type of the object being cut;

[0020] The preset parameters are determined based on the type of the object being cut.

[0021] In one embodiment, identifying the type of the object being cut includes:

[0022] Obtain the image information of the object being cut;

[0023] The type of the object being cut is determined based on the image information of the object being cut;

[0024] Alternatively, the type of the object being cut can be determined based on the pressure detected by the grip and the current being applied during operation.

[0025] In one embodiment, the detection method further includes:

[0026] The total cutting time and / or the output power consumption are calculated.

[0027] If the cumulative cutting time is greater than the preset time and / or the cumulative output power consumption is greater than the preset power consumption, it is determined that the working component has been passivated.

[0028] In one embodiment, the detection method further includes:

[0029] If it is determined that the working part is in a first-level passivation state, control the working part to continue cutting and output a first-level prompt message;

[0030] If it is determined that the working part is in a secondary passivation state, control the working part to stop cutting and output a secondary prompt message.

[0031] In one embodiment, the detection method further includes:

[0032] If the passivation characteristic value of the electric device is less than the first preset characteristic value and greater than the second preset characteristic value, the working component is determined to be in a first-level passivation state; if the passivation characteristic value is less than the second preset characteristic value, the working component is determined to be in a second-level passivation state.

[0033] In one embodiment, the detection method further includes:

[0034] Identify the user using the electric equipment;

[0035] The preset parameters are determined based on the user's historical data; the historical data includes at least the type of object being cut, the pressure detected by the grip, the operating current, and the cutting time.

[0036] This application also proposes a detection circuit for use in an electric device, the electric device including a working part and a gripping part, comprising:

[0037] A drive circuit is used to drive the working component to work;

[0038] The detection module is used to detect the operating current of the drive circuit and the pressure applied to the gripping part;

[0039] The processor is electrically connected to the drive circuit and the detection module respectively; the processor is used to obtain the cutting time of the working part cutting the object, and to determine the passivation state of the working part based on the working current, the pressure on the gripping part and the cutting time.

[0040] This application also proposes an electric device, the electric device comprising:

[0041] Holding part;

[0042] Working parts used for cutting objects;

[0043] A drive motor is used to drive the working parts to work.

[0044] The parameter detection module is used to detect the operating current of the drive motor;

[0045] A pressure detection device is provided on the grip portion for detecting the pressure applied to the grip portion;

[0046] A control circuit is used to acquire the cutting time of the working component cutting the object, and to determine the passivation state of the working component based on the working current, the pressure on the gripping part, and the cutting time.

[0047] In one embodiment, the pressure detection device includes at least a piezoresistive pressure sensor, a capacitive pressure sensor, an electromagnetic pressure sensor, and a piezoelectric pressure sensor.

[0048] This application detects the passivation status of an electric device by measuring the actual operating current and cutting time while the device is in a cutting state. This allows for timely and accurate detection of the passivation status of the device, prompting users to replace it promptly. This improves user efficiency and reduces user safety risks. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the module structure of an embodiment of the electric device of this application.

[0050] Figure 2 This is a schematic diagram of the structure of an embodiment of the electric device of this application.

[0051] Figure 3 This is the waveform of the operating current when the chainsaw is cutting an object in a passivated state.

[0052] Figure 4 This is the waveform of the operating current when the chainsaw is cutting an object in its unpassivated state.

[0053] Figure 5 This is a graph showing the relationship between the average power and output power consumption of a chainsaw in both the passivated and non-passivated states.

[0054] Figure 6 This is a circuit diagram of an embodiment of the drive motor of this application.

[0055] Figure 7 This is a module structure diagram of an embodiment of the detection circuit of this application.

[0056] Figure 8 This is a flowchart of one embodiment of the detection method of this application.

[0057] Figure 9 This is a flowchart illustrating an embodiment of determining the passivation state in this application.

[0058] Figure 10 This is a flowchart illustrating one embodiment of determining the working state of this application.

[0059] Figure 11 This is a flowchart of another embodiment of the determination detection method of this application.

[0060] Figure 12 This is a flowchart illustrating an embodiment of the method for identifying the type of object to be cut in this application.

[0061] Figure 13 This is a flowchart illustrating another embodiment of the identification of the type of object to be cut in this application.

[0062] Figure 14 This is a flowchart of another embodiment of the detection method of this application.

[0063] Figure 15 This is a flowchart of yet another embodiment of the detection method of this application.

[0064] Figure 16 This is a flowchart of yet another embodiment of the detection method of this application.

[0065] Figure 17 This is a flowchart of yet another embodiment of the detection method of this application.

[0066] Electrical equipment 100 Working parts 110

[0067] Drive motor 120 Parameter detection module 130

[0068] Control circuit 140; Pressure detection device 150

[0069] Grip 160 Display device 170

[0070] Drive circuit 121 Motor 122

[0071] Detection circuit 200, drive module 210

[0072] Detection module 220, processor 230, circuit detection circuit 131

[0073] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0074] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0075] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof.

[0076] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0077] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments. It should be noted that components depicted in the drawings are not necessarily shown to scale; and identical or similar components will be designated with the same or similar reference numerals or similar technical terms.

[0078] Electric cutting equipment primarily relies on its working parts to perform operations such as cutting, grinding, and rotating. For example, an electric chainsaw cuts by applying pressure to the object being cut through its working parts. Due to friction with the object during use, the working parts become dull and gradually lose their sharpness. Dull working parts encounter greater resistance during cutting, which not only reduces efficiency but may also lead to breakage of the object or malfunction of the electric equipment, increasing safety risks. Simultaneously, the drive motor in the electric equipment bears a greater load to overcome the increased resistance, potentially causing premature damage. To avoid these consequences, users should regularly grind and maintain the working parts to keep them sharp and in normal working condition. However, users cannot accurately judge the condition of the working parts by sight or feeling, resulting in the working parts often operating in a dulled or aged state.

[0079] Reference Figure 1 and Figure 2 This application discloses an electric device 100, which includes a gripping part 160, a working part 110, a drive motor 120, a parameter detection module 220130, a pressure detection device 150, and a control circuit 140. The working part 110 is used to cut an object. The drive motor 120 is used to drive the working part 110 to work. The parameter detection module 220130 is used to detect the operating current of the drive motor 120. The pressure detection device 150 is used to detect the pressure applied to the gripping part 160. The control circuit 140 is used to acquire the cutting time of the working part 110 cutting the object, and to determine the passivation state of the working part 110 based on the operating current, the pressure applied to the gripping part 160, and the cutting time.

[0080] In this embodiment, the electric device 100 can be an electric chainsaw, an electric knife, an electric cutting machine, etc. Taking an electric chainsaw as an example, the working part 110 can be a chainsaw. The control circuit 140 can output a drive current to control the drive motor 120 to drive the chainsaw to rotate at high speed to cut objects. The control circuit 140 can be implemented using chips with control functions such as microprocessors and FPGAs (Field Programmable Gate Arrays). The parameter monitoring module can include a current detection circuit 131, which can be implemented using a detection resistor. The parameter monitoring module can also include a voltage detection circuit 200 for detecting the operating voltage of the drive motor 120.

[0081] The electric device 100 operates in two states: no-load and cutting. When the electric device 100 is running and not cutting an object, it is in a no-load state, and the operating current detected by the parameter detection module 130 is the no-load current. When cutting an object, it is in a cutting state; the load increases, and the operating current increases accordingly. Therefore, the control circuit 140 can determine whether the electric device 100 is in a cutting state by comparing the operating current with a first preset current. For example, the preset current can be set to be slightly greater than the load current; if the operating current is greater than the preset current, then the electric device 100 is determined to be in a cutting state.

[0082] The control circuit 140 can time the operating current that is greater than the preset current, and use it as the cutting time. Figure 3 This is the waveform of the operating current when the chainsaw is cutting an object in a passivated state. Figure 4 This is the waveform of the operating current of the chainsaw cutting an object in its unpassivated state. It can be seen that the operating current of the chainsaw is small and the cutting time is long in the passivated state; the operating current of the chainsaw is large and the cutting time is short in the unpassivated state. Therefore, the control circuit 140 can calculate the average operating current over the cutting time and determine the passivation state of the chainsaw based on the average operating current.

[0083] Where I1 is the average operating current, t1 is the cutting time, and I curr1 -I base The cutting current applied to the object being cut by the drive motor 120.

[0084] The control circuit 140 can compare the average operating current with the preset operating current. If the average operating current is less than the preset operating current, it is determined that the chainsaw has been passivated. The preset operating current can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the average operating current in the non-passivated state, or it can be set based on the average operating current in the passivated state obtained by actual measurement. There are no restrictions here.

[0085] Alternatively, the control circuit 140 can obtain the operating voltage of the drive motor 120, calculate the average power within the cutting time based on the operating voltage, operating current, and cutting time, and determine the dulling state of the chainsaw based on the average power.

[0086] Where P1 is the average power, U base This is the operating voltage for the drive motor 120.

[0087] The operating voltage of the drive motor 120 can be the output voltage of the battery pack. With a constant operating voltage, a higher operating current results in higher power. The control circuit 140 can compare the average power with a preset power. If the average power is less than the preset power, it determines that the chainsaw has become dull. The preset power can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the average power in the non-dulled state, or it can be set based on the average power measured in the dulled state; there are no restrictions here.

[0088] Alternatively, the control circuit 140 can calculate the output power consumption and average power of the drive motor 120 based on the input voltage, operating current, and cutting time, and determine the passivation state of the chainsaw based on the ratio of average power to drive power consumption.

[0089]

[0090] Where E1 is the output power consumption, and k1 is the ratio of average power to drive power consumption.

[0091] Figure 5 This diagram shows the relationship between the average power and output power consumption of a chainsaw in both passivated and non-passivated states. It can be seen that, for the same output power consumption, the ratio of average power to drive power consumption in the passivated state is less than that in the non-passivated state. The control circuit 140 can compare the ratio of average power to drive power consumption with a preset characteristic value. If the ratio is less than the preset characteristic value, the chainsaw is determined to be passivated. The preset characteristic value can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the ratio of average power to drive power consumption in the non-passivated state, or it can be set based on the actual measured ratio of average power to drive power consumption in the passivated state; no restrictions are imposed here.

[0092] Furthermore, the electric device 100 also includes a grip 160. A pressure detection device 150 may be provided on the grip 160 to detect the pressure applied to the electric device 100 by the user. When using the electric device 100 to cut an object, the user may apply pressure to the electric device 100 to facilitate cutting. The pressure applied by the user increases the resistance between the working part 110 and the object being cut, increases the load on the drive motor 120, and causes a corresponding increase in the operating current. Therefore, the criteria for determining chainsaw dulling differ depending on the applied pressure.

[0093] For example, preset operating current, preset average power, and preset characteristic values ​​can be determined based on the actual detected operating current. The greater the applied pressure, the greater the operating current, and therefore the greater the preset operating current, preset average power, and preset characteristic values. Alternatively, preset operating current, preset average power, and preset characteristic values ​​under different pressures can be determined based on actual tests and stored in the control circuit 140.

[0094] In one embodiment, the control circuit 140 is further configured to identify the type of the object being cut and determine the preset parameters based on the type of the object being cut.

[0095] The operating current and cutting time of an electric chainsaw vary depending on the type of object being cut. Figure 3 The graphs show the current-time curves for an electric chainsaw cutting larger and smaller diameter timber under the same pressure. It can be seen that cutting larger diameter timber requires a higher current and a longer cutting time. Therefore, the criteria for determining chainsaw dulling differ depending on the object being cut.

[0096] In one embodiment, the control circuit 140 is further configured to acquire image information of the object to be cut, and determine the type of the object to be cut based on the image information.

[0097] In this embodiment, the electric device 100 may further include a camera device. The camera device can capture an image of the object being cut, and the control circuit 140 determines the type of the object being cut by recognizing the image, and determines a preset operating current, a preset average power, and preset characteristic values ​​based on the type of the object being cut. The preset operating current, preset average power, and preset characteristic values ​​for different types of objects being cut can be determined through pre-testing and stored in the control circuit 140.

[0098] In one embodiment, the control circuit 140 is also configured to determine the type of the object being cut based on the pressure detected by the grip 160 and the operating current.

[0099] For example, the actual current-time curve of the cutting state can be compared with a pre-stored current-time curve, and the object type corresponding to the curve closest to the actual cutting object type can be used. The pre-stored current-time curve can be the current-time curve of a chainsaw cutting various types of objects under different applied pressures when the chainsaw's passivation level is 0.

[0100] Alternatively, the pre-stored current-time curve can be a current-time curve showing the chainsaw cutting various types of objects with zero passivation and no applied pressure. The preset operating current, preset average power, and preset characteristic value for each type of object can be determined based on this current-time curve. As the applied pressure increases, the preset operating current, preset average power, and preset characteristic value also increase accordingly.

[0101] For example, in the current-time curve of a small-diameter piece of wood without applied pressure, the average current during the cutting time is 5A. Therefore, the preset working current for cutting small-diameter wood without applied pressure is 4A. If the applied pressure is 10N, the preset working current is adjusted to 10*a*4=6A, where 'a' can be set to different values ​​according to the actual application.

[0102] In one embodiment, the control circuit 140 is further configured to accumulate the cutting time and / or output power consumption. If the accumulated cutting time exceeds a preset time and / or the accumulated output power consumption exceeds a preset power consumption, it is determined that the electric device 100 has been passivated. The preset time and preset power consumption can be set according to actual usage conditions, for example, determined based on the actual user, the type of electric device 100, etc.

[0103] In one embodiment, the control circuit 140 is further configured to control the working component 110 to continue cutting and output a first-level prompt message when it is determined that the working component 110 is in a first-level passivation state; and to control the working component 110 to stop cutting and output a second-level prompt message when it is determined that the working component 110 is in a second-level passivation state.

[0104] In this embodiment, if it is determined that the working component 110 is in a first-level passivation state, it means that the working component 110 has been passivated, but can still be used and needs to be replaced as soon as possible. Therefore, the control circuit 140 can control the working component 110 to continue cutting, and at the same time output a first-level prompt message to remind the user to replace the working component 110 in time. In optional examples, depending on the specific situation, although cutting continues, the cutting speed can be reduced to protect the working component, or the cutting speed can be accelerated to complete the operation as soon as possible.

[0105] If the working part 110 is determined to be in a secondary passivation state, it indicates that the passivation of the working part 110 is severe and it cannot continue to be used, and it needs to be replaced as soon as possible. Therefore, the control circuit 140 can control the working part 110 to stop cutting, and at the same time output a secondary prompt message to remind the user to replace the working part 110.

[0106] The electric device 100 may also include a display device 170 and / or a sound-emitting device. The display device 170 may be a display screen, LED, digital tube, etc. The primary prompt information may be displayed as information indicating primary passivation, or flashing lights at a first preset frequency. The secondary prompt information may be displayed as information indicating secondary passivation, or flashing lights at a second preset frequency higher than the first preset frequency. The sound-emitting device may be a buzzer, loudspeaker, etc. The primary prompt information may be broadcast as information indicating primary passivation, or audible prompt at a third preset frequency. The secondary prompt information may be broadcast as information indicating secondary passivation, or audible prompt at a fourth preset frequency higher than the third preset frequency.

[0107] In one embodiment, if the passivation characteristic value is less than a first preset characteristic value and greater than a second preset characteristic value, the working component 110 is determined to be in a first-level passivation state; if the passivation characteristic value is less than the second preset characteristic value, the working component 110 is determined to be in a first-level passivation state. The first and second preset characteristic values ​​can be determined based on the type of object being cut, the pressure applied to the gripping part 160, etc.

[0108] Furthermore, the control circuit 140 can also communicate with a mobile terminal (such as a mobile phone, computer, etc.) to send the passivation status of the working component 110 and prompt information to the mobile terminal.

[0109] In one embodiment, when a new working component 110 is replaced, the control circuit 140 resets the preset duration and cumulative output power consumption to zero.

[0110] In one embodiment, the control circuit 140 is also used to identify the user of the electric device 100 and determine the preset parameters based on the user's historical data; the historical data includes at least the type of object being cut, the pressure detected by the grip 160, the operating current, and the cutting time.

[0111] Different users have different cutting habits, such as the objects they cut and the pressure they apply when using an electric chainsaw. Therefore, the criteria for determining chainsaw dulling also differ among different users.

[0112] In this embodiment, the control circuit 140 can identify the user of the electric chainsaw through fingerprint recognition, facial recognition, account recognition, etc., and record the user's historical data. Based on the historical data, it determines the preset operating current, preset average power, and preset characteristic value when the user uses the electric chainsaw. When the user uses the electric chainsaw again, the operating current in the historical data can be used to drive the motor 120, and the preset operating current, preset average power, and preset characteristic value determined based on the historical data can be used for passivation determination.

[0113] Reference Figure 6 In one embodiment, the drive motor 120 may include a drive circuit 121 and a motor 122. The drive circuit 121 may be implemented using multiple switching transistors, and the control circuit 140 drives the motor 120 to work by controlling the multiple switching transistors to alternately conduct and output current. The parameter detection module 130 may be implemented using a sensing resistor. The sensing resistor is connected in series in the drive circuit 121 to collect the operating current of the drive circuit 121 and output it to the analog-to-digital converter circuit. The analog-to-digital converter circuit converts the analog current signal into a digital current signal and then outputs it to the control circuit 140.

[0114] This application performs passivation detection on the electric device 100 when it is in a cutting state, based on the actual detected working current, the pressure on the gripping part 160, and the cutting time. This can promptly and accurately reflect the passivation state of the electric device 100, and remind the user to replace it in a timely manner, thereby improving the user's work efficiency and reducing the user's safety risks.

[0115] Reference Figure 7 This application also proposes a detection circuit 200 applied to an electric device 100, the electric device 100 including a working part 110 and a gripping part 160, including a drive module 210, a detection module 220 and a processor 230. The drive module 210 is used to drive the working part 110 to work. The detection module 220 is used to detect the operating current of the drive module 210 and the pressure on the gripping part 160. The processor 230 is electrically connected to the drive module 210 and the detection module 220 respectively; the processor 230 is used to obtain the cutting time of the working part 110 cutting the object, and determine the passivation state of the working part 110 based on the operating current, the pressure on the gripping part 160 and the cutting time.

[0116] In this embodiment, the electric device 100 can be an electric chainsaw, an electric knife, an electric cutting machine, etc. Taking an electric chainsaw as an example, the working part 110 can be a chainsaw. The detection module 220 can include a current detection circuit 131, which can be implemented using a detection resistor. The detection module 220 can also include a voltage detection circuit 200 for detecting the operating voltage of the drive motor 120. The detection module 220 can also include a pressure sensor disposed on the grip portion 160 to detect the pressure applied by the user to the grip portion 160. The drive module 210 can include a drive circuit and a motor.

[0117] The electric device 100 operates in two states: an unloaded state and a cutting state. When the electric device 100 is running and not cutting an object, it is in an unloaded state, and the operating current detected by the detection module 220 is the unloaded current. When cutting an object, it is in a cutting state; the load increases, and the operating current increases accordingly. Therefore, the processor 230 can determine whether the electric device 100 is in a cutting state by comparing the operating current with a first preset current. For example, the preset current can be set to be slightly greater than the load current; if the operating current is greater than the preset current, then the electric device 100 is determined to be in a cutting state.

[0118] The processor 230 can time the operating current that is greater than a preset current, and use it as the cutting time. Figure 3 This is the waveform of the operating current when the chainsaw is cutting an object in a passivated state. Figure 4 This is the waveform of the operating current of the chainsaw cutting an object in its unpassivated state. It can be seen that the operating current of the chainsaw is small and the cutting time is long in the passivated state; the operating current of the chainsaw is large and the cutting time is short in the unpassivated state. Therefore, the processor 230 can calculate the average operating current over the cutting time and determine the passivation state of the chainsaw based on the average operating current.

[0119] Where I1 is the average operating current, t1 is the cutting time, and I curr1 -I base The cutting current applied to the object being cut by the drive motor 120.

[0120] The processor 230 can compare the average operating current with a preset operating current. If the average operating current is less than the preset operating current, it determines that the chainsaw has been passivated. The preset operating current can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the average operating current in the non-passivated state, or it can be set based on the average operating current in the passivated state obtained by actual measurement. There are no restrictions here.

[0121] Alternatively, the processor 230 can obtain the operating voltage of the drive module 210, calculate the average power within the cutting time based on the operating voltage, operating current, and cutting time, and determine the chainsaw's passivation state based on the average power.

[0122] Where P1 is the average power, U base This is the operating voltage of the drive module 210.

[0123] The operating voltage of the drive module 210 can be the output voltage of the battery pack. With a constant operating voltage, a higher operating current results in higher power. The processor 230 can compare the average power with a preset power; if the average power is less than the preset power, it determines that the chainsaw has become passivated. The preset power can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the average power in the non-passivated state, or it can be set based on the average power measured in the passivated state; there are no restrictions here.

[0124] Alternatively, the processor 230 can calculate the output power consumption and average power of the drive module 210 based on the input voltage, operating current, and cutting time, and determine the passivation state of the chainsaw based on the ratio of average power to drive power consumption.

[0125]

[0126] Where E1 is the output power consumption, and k1 is the ratio of average power to drive power consumption.

[0127] Figure 5 This diagram shows the relationship between the average power and output power consumption of the chainsaw in both passivated and non-passivated states. It can be seen that, for the same output power consumption, the ratio of average power to drive power consumption in the passivated state is less than that in the non-passivated state. The processor 230 can compare the ratio of average power to drive power consumption with a preset characteristic value. If the ratio is less than the preset characteristic value, the chainsaw is determined to be passivated. The preset characteristic value can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the ratio of average power to drive power consumption in the non-passivated state, or it can be set based on the actual measured ratio of average power to drive power consumption in the passivated state; no restrictions are placed here.

[0128] Furthermore, the pressure detection device 150 in the detection module 220 can be disposed in the grip portion 160 to detect the pressure applied by the user to the electric device 100. When the user uses the electric device 100 to cut an object, they may apply pressure to the electric device 100 to facilitate cutting. The pressure applied by the user increases the resistance between the working part 110 and the object being cut, increases the load on the drive module 210, and causes the operating current to increase accordingly. Therefore, the criteria for determining chainsaw dulling differ depending on the applied pressure.

[0129] For example, preset operating current, preset average power, and preset characteristic values ​​can be determined based on the actual detected operating current. The greater the applied pressure, the greater the operating current, and therefore the greater the preset operating current, preset average power, and preset characteristic values. Alternatively, preset operating current, preset average power, and preset characteristic values ​​under different pressures can be determined based on actual tests and stored in processor 230.

[0130] This application determines the working status of the electric device 100 by detecting the operating current of the drive module 210. When the electric device 100 is in the cutting state, the processor 230 performs passivation detection on the electric device 100 based on the actual detected operating current, the pressure on the gripping part 160, and the cutting time. This can promptly and accurately reflect the passivation status of the electric device 100, and remind the user to replace it in time, thereby improving the user's work efficiency and reducing the user's safety risks.

[0131] Reference Figure 8 This application also proposes a detection method applied to an electric device 100, the electric device 100 including a working part 110 and a gripping part 160, the working part 110 being used to cut an object, the detection method including:

[0132] S1: Obtain the working status of the electric device 100.

[0133] S2: If the working status of the electric device 100 indicates that the electric device 100 is in the cutting state, the operating parameters of the electric device 100 are obtained. The operating parameters include at least: operating current, cutting time and pressure detected by the gripping part 160.

[0134] S3: Based on the operating parameters and preset parameters, determine the passivation state of the working component 110.

[0135] In this embodiment, the operating state of the electric device 100 can be determined based on the operating current, operating voltage, etc. The cutting time is recorded for the working component 110 in the cutting state. Figure 2The waveforms show the operating current of a chainsaw cutting the same object in both the passivated and non-passivated states. It can be seen that the chainsaw has a smaller operating current and a longer cutting time in the passivated state, while it has a larger operating current and a shorter cutting time in the non-passivated state. Therefore, the passivation state of the electric device 100 can be determined based on the operating current and cutting time.

[0136] For example, the average operating current during the cutting time can be calculated, and the passivation state of the chainsaw can be determined based on the average operating current:

[0137] Where I1 is the average operating current, t1 is the cutting time, and I curr1 -I base The cutting current applied to the object being cut by the drive motor 120.

[0138] The average operating current can be compared with the preset operating current. If the average operating current is less than the preset operating current, it is determined that the chainsaw has been passivated. The preset operating current can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the average operating current in the non-passivated state, or it can be set based on the average operating current in the passivated state obtained by actual measurement. There are no restrictions here.

[0139] Alternatively, the operating voltage of the electric device 100 can be obtained, and the average power during the cutting time can be calculated based on the operating voltage, operating current, and cutting time. The passivation state of the chainsaw can then be determined based on the average power.

[0140] Where P1 is the average power, U base This is the operating voltage.

[0141] With a constant operating voltage, a higher operating current results in higher power. The average power can be compared to a preset power; if the average power is less than the preset power, the chainsaw is considered to be passivated. The preset power can be set according to actual needs. For example, it can be set to 60%, 75%, or 80% of the average power in the unpassivated state, or it can be set based on the average power measured in the passivated state; there are no restrictions here.

[0142] Reference Figure 9 In one embodiment, the operating parameters further include the operating voltage, and step S3 includes:

[0143] S31: Calculate the integral of the product of the operating current and the operating voltage over the cutting time to obtain the output power consumption of the electric device 100;

[0144] S32: Calculate the quotient of the output power consumption and the cutting time to determine the average power of the electric device 100;

[0145] S33: Calculate the quotient of the average power and the output power consumption, and determine the passivation characteristic value of the electric device 100;

[0146] S34: If the passivation characteristic value is less than a preset characteristic value, determine that the working component 110 has been passivated.

[0147] In this embodiment, the output power consumption and average power of the electric device 100 can also be calculated according to the input voltage, working current, and cutting duration, and the passivation state of the chain saw can be determined according to the ratio of the average power and the driving power consumption:

[0148]

[0149] Among them, E1 is the output power consumption, and k1 is the ratio of the average power and the driving power consumption.

[0150] Figure 5 is a relationship diagram of the average power and output power consumption of the chain saw in the passivated state and the non-passivated state. It can be seen that at the same output power consumption, the ratio of the average power and the driving power consumption of the chain saw in the passivated state is less than that in the non-passivated state. Compare the ratio of the average power and the driving power consumption with the preset characteristic value. If the ratio of the average power and the driving power consumption is less than the preset characteristic value, it is determined that the chain saw has been passivated. Among them, the preset characteristic value can be set according to actual needs. For example, it can be set to 60%, 75%, 80%, etc. of the ratio of the average power and the driving power consumption in the non-passivated state, or set according to the ratio of the average power and the driving power consumption measured in the passivated state, which is not limited here.

[0151] Furthermore, the electric device 100 further includes a pressure detection device 150. The pressure detection device 150 can be disposed on the holding portion 160 to detect the pressure applied by the user to the electric device 100. When the user uses the electric device 100 to cut an object, the user may apply pressure to the electric device 100 to facilitate cutting. The pressure applied by the user increases the resistance between the working component 110 and the object to be cut, increases the load of the electric device 100, and causes the working current to increase accordingly. Therefore, under different applied pressures, the determination conditions for determining the passivation of the chain saw are different.

[0152] For example, the preset working current, preset average power, and preset characteristic value can be determined according to the actually detected working current. The greater the applied pressure, the greater the working current, and the greater the preset working current, preset average power, and preset characteristic value. Or, determine the preset working current, preset average power, and preset characteristic value under different pressures according to actual tests and store them in the control circuit 140.

[0153] Refer to Figure 10 , in an embodiment, step S1 includes:

[0154] S11: Obtain the operating current of the electric device 100.

[0155] S12: If the operating current is greater than the first preset current, it is determined that the electric device 100 is in a cutting state; the first preset current is greater than or equal to the no-load current of the electric device 100.

[0156] When the electric device 100 is running and not cutting an object, the parameter detection module 130 detects the no-load current. When cutting an object, the load increases, and the operating current increases accordingly. Therefore, the control circuit 140 can determine whether the electric device 100 is in the cutting state by comparing the operating current with a preset current. For example, the preset current can be set to be slightly greater than the load current. If the operating current is greater than the preset current, then the electric device 100 is determined to be in the cutting state.

[0157] Reference Figure 11 In one embodiment, the detection method further includes:

[0158] S4: Identify the type of the object being cut;

[0159] S5: Determine the preset parameters based on the type of the object being cut.

[0160] The operating current and cutting time of an electric chainsaw vary depending on the type of object being cut. Figure 3 The graphs show the current-time curves for an electric chainsaw cutting larger and smaller diameter timber under the same pressure. It can be seen that cutting larger diameter timber requires a higher current and a longer cutting time. Therefore, the criteria for determining chainsaw dulling differ depending on the object being cut.

[0161] Reference Figure 12 In one embodiment, step S4 includes:

[0162] S41: Obtain image information of the object being cut.

[0163] S42: Determine the type of the object being cut based on the image information of the object being cut.

[0164] The electrical device 100 may also include a camera device. The camera device can capture images of the object being cut, determine the type of the object being cut by recognizing the images, and determine preset operating current, preset average power, and preset characteristic values ​​based on the type of the object being cut. The preset operating current, preset average power, and preset characteristic values ​​for different types of objects being cut can be determined and stored through pre-testing.

[0165] Reference Figure 13In one embodiment, step S4 includes:

[0166] S43: Determine the type of the object being cut based on the pressure detected by the gripping part 160 and the operating current.

[0167] For example, the actual current-time curve of the cutting state can be compared with a pre-stored current-time curve, and the object type corresponding to the curve closest to the actual cutting object type can be used. The pre-stored current-time curve can be the current-time curve of a chainsaw cutting various types of objects under different applied pressures when the chainsaw's passivation level is 0.

[0168] Alternatively, the pre-stored current-time curve can be a current-time curve showing the chainsaw cutting various types of objects with zero passivation and no applied pressure. The preset operating current, preset average power, and preset characteristic value for each type of object can be determined based on this current-time curve. As the applied pressure increases, the preset operating current, preset average power, and preset characteristic value also increase accordingly.

[0169] For example, in the current-time curve of a small-diameter piece of wood without applied pressure, the average current during the cutting time is 5A. Therefore, the preset working current for cutting small-diameter wood without applied pressure is 4A. If the applied pressure is 10N, the preset working current is adjusted to 10*a*4=6A, where 'a' can be set to different values ​​according to the actual application.

[0170] Reference Figure 14 In one embodiment, the detection method further includes:

[0171] S6: Accumulate the cutting time and / or the output power consumption.

[0172] S7: If the cumulative cutting time is greater than the preset time and / or the cumulative output power consumption is greater than the preset power consumption, it is determined that the working component 110 has been passivated.

[0173] The preset duration and preset power consumption can be set according to actual usage conditions, such as the actual user and the type of electric equipment 100.

[0174] Reference Figure 15 In one embodiment, the detection method further includes:

[0175] S8: If it is determined that the working part 110 is in a first-level passivation state, control the working part 110 to continue cutting and output a first-level prompt message;

[0176] S9: If it is determined that the working part 110 is in a secondary passivation state, control the working part 110 to stop cutting and output a secondary prompt message.

[0177] In this embodiment, if the working component 110 is determined to be in a first-level passivation state, it means that the working component 110 has been passivated but can still be used and needs to be replaced as soon as possible. Therefore, the working component 110 can be controlled to continue cutting, and a first-level prompt message can be output to remind the user to replace the working component 110 in time. If the working component 110 is determined to be in a second-level passivation state, it means that the working component 110 is severely passivated and cannot be used, and needs to be replaced as soon as possible. Therefore, the working component 110 can be controlled to stop cutting, and a second-level prompt message can be output to remind the user to replace the working component 110.

[0178] The electric device 100 may also include a display device 170 and / or a sound-emitting device. The display device 170 may be a display screen, LED, digital tube, etc. The primary prompt information may be displayed as information indicating primary passivation, or flashing lights at a first preset frequency. The secondary prompt information may be displayed as information indicating secondary passivation, or flashing lights at a second preset frequency higher than the first preset frequency. The sound-emitting device may be a buzzer, loudspeaker, etc. The primary prompt information may be broadcast as information indicating primary passivation, or audible prompt at a third preset frequency. The secondary prompt information may be broadcast as information indicating secondary passivation, or audible prompt at a fourth preset frequency higher than the third preset frequency.

[0179] Reference Figure 16 In one embodiment, the detection method further includes:

[0180] S10: If the passivation feature value is less than the first preset feature value and greater than the second preset feature value, the working component 110 is determined to be in a first-level passivation state; if the passivation feature value is less than the second preset feature value, the working component 110 is determined to be in a second-level passivation state.

[0181] The first preset feature value and the second preset feature value can be determined based on the type of object being cut, the pressure on the gripping part 160, etc.

[0182] Reference Figure 17 In one embodiment, the detection method further includes:

[0183] S11: Identify the user using the electric device 100.

[0184] S12: Determine the preset parameters based on the user's historical data; the historical data includes at least the type of object being cut, the pressure detected by the gripping part 160, the operating current, and the cutting time.

[0185] Different users have different cutting habits, such as the objects they cut and the pressure they apply when using an electric chainsaw. Therefore, the criteria for determining chainsaw dulling also differ among different users.

[0186] In this embodiment, the user of the electric chainsaw can be identified through fingerprint recognition, facial recognition, account recognition, etc., and the user's historical data can be recorded. Based on the historical data, the preset operating current, preset average power, and preset characteristic value when the user uses the electric chainsaw can be determined. When the user uses the electric chainsaw again, the operating current in the historical data can be used to drive the motor 120, and the preset operating current, preset average power, and preset characteristic value determined based on the historical data can be used for passivation determination.

[0187] This application obtains the working status of the electric device 100. When the electric device 100 is in the cutting state, it performs passivation detection on the electric device 100 based on the actual detected working current, the pressure on the gripping part 160, and the cutting time. This can promptly and accurately reflect the passivation status of the electric device 100 and remind the user to replace it in time, thereby improving the user's work efficiency and reducing the user's safety risks.

[0188] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A detection method applied to an electric power tool, the electric power tool comprising a working part and a grip part, the working part being used for cutting an object, characterized in that, The detection method comprises: acquiring the working state of the electric device; if the working state of the electric device indicates that the electric device is in a cutting state, acquiring the running parameters of the electric device, the running parameters at least comprising: working current, cutting duration and pressure detected by the holding part; based on the running parameters and preset parameters, determining the passivation state of the working component.

2. The detection method of claim 1, wherein, The running parameters further comprise working voltage, based on the running parameters and preset parameters, determining the passivation state of the working component, comprising: calculating the integral of the product of the working current and working voltage with respect to the cutting duration to obtain the output power consumption of the electric device; calculating the quotient of the output power consumption and the cutting duration to determine the average power of the electric device; calculating the quotient of the average power and the output power consumption to determine the passivation characteristic value of the electric device; if the passivation characteristic value is less than a preset characteristic value, it is determined that the working component has been passivated.

3. The detection method of claim 1, wherein, The detection method further comprises: identifying the type of the cut object; determining the preset parameters based on the type of the cut object.

4. The detection method of claim 3, wherein, The identification of the type of the cut object comprises: acquiring image information of the cut object; determining the type of the cut object based on the image information of the cut object; or, determining the type of the cut object based on the pressure detected by the holding part and the working current.

5. The detection method as described in claim 2, characterized in that, The detection method further comprises: accumulating the cutting duration and / or the output power consumption; if the accumulated cutting duration is greater than a preset duration and / or the accumulated output power consumption is greater than a preset power consumption, it is determined that the working component has been passivated.

6. The detection method as described in claim 1, characterized in that, The detection method further comprises: if it is determined that the working component is in a first-level passivation state, controlling the working component to continue cutting and outputting a first-level prompt information; if it is determined that the working component is in a second-level passivation state, controlling the working component to stop cutting and outputting a second-level prompt information; wherein, if the passivation characteristic value of the electric device is less than a first preset characteristic value and greater than a second preset characteristic value, it is determined that the working component is in a first-level passivation state; if the passivation characteristic value is less than the second preset characteristic value, it is determined that the working component is in a second-level passivation state.

7. The detection method as described in claim 1, characterized in that, The detection method further comprises: identifying the user using the electric device; determining the preset parameters based on the historical data of the user; the historical data at least comprising the type of the cut object, the pressure detected by the holding part, the working current and the cutting duration.

8. A detection circuit applied to an electric power tool, the electric power tool comprising a working part and a grip part, the working part being used for cutting an object, characterized in that, comprising: a driving circuit for driving the working component to work; a detection module for detecting the working current of the driving circuit and the pressure received by the holding part; a processor electrically connected with the driving circuit and the detection module respectively; the processor is used to acquire the cutting duration of the working component cutting the object, and determine the passivation state of the working component based on the working current, the pressure received by the holding part and the cutting duration.

9. An electrically powered device, characterized in that The electric device comprises: a holding part; a working component for cutting an object; a driving motor for driving the working component to work; a parameter detection module for detecting the working current of the driving motor; A pressure detection device is arranged on the holding part and used for detecting the pressure received by the holding part; A control circuit is used for acquiring a cutting duration of the working part when cutting an object, and determining a passivation state of the working part based on the working current, the pressure received by the holding part and the cutting duration.

10. The electrically powered device of claim 9, wherein, The pressure detection device at least includes a piezoresistive pressure sensor, a capacitive pressure sensor, an electromagnetic pressure sensor and a piezoelectric pressure sensor.

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