Operation detection system and method

Abstract

The present invention provides an operation detection system and method, the system includes a current detection module and a control module. The current detection module is used to detect the current value of an electric batcher in an operated state, and the current value of the electric batcher is the current value in the current loop of the electric batcher; the control module is used to determine whether the operation is in violation of the regulations according to the current value in the current loop in the monitoring mode. In this embodiment, the current value in the current loop of the electric batcher can be used to determine whether the operation is in violation of the regulations, so that the staff can detect the products produced by the illegal operation in a timely manner, and can find defective products in a timely and effective manner, so as to avoid the quality risk hazards and customer complaints that may be caused after the defective products are put on the market.

Description

Technical Field

[0001] The present invention relates to the technical field of electric screwdriver bits, and in particular to an operation detection system and method. Background Art

[0002] At present, operators of production lines in the industry may make some illegal operations during the assembly process using electric screwdrivers, resulting in the production of defective products.

[0003] At present, subjective judgment is usually used to detect whether the product is qualified. However, in the assembly line operation, defective products cannot be found in time due to inadequate personnel training, inadequate human inspection and monitoring, and lack of concentration. When these defective products are not discovered in time and put on the market, they will lead to potential quality risks and may be accompanied by customer complaints. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an operation detection system and method, which can determine whether an operation is illegal based on the current value in the current circuit of the electric screwdriver, which is helpful to find defective products in time.

[0005] According to one aspect of the present invention, there is provided an operation detection system, which is applied to an electric batch, comprising:

[0006] A current detection module, used to detect the current value of the electric batch in an operated state, the current value of the electric batch being the current value in the current loop of the electric batch;

[0007] The control module is used to determine whether an operation is illegal according to the current value in the current loop in the monitoring mode.

[0008] Optionally, judging whether the operation is illegal according to the current value in the current loop includes:

[0009] A current increase value of the current value in the current loop in a monitoring phase is obtained, and when the current increase value is greater than a maximum increase value threshold or less than a minimum increase value threshold, an operation violation is determined.

[0010] Optionally, judging whether the operation is illegal according to the current value in the current loop further includes:

[0011] When the current increase value is greater than or equal to the minimum increase value threshold and less than the maximum increase value threshold, the current average value and / or the current standard deviation of the current value in the current loop within a monitoring stage are obtained, and when the current average value is not within the average value threshold interval and / or the current standard deviation is not within the standard deviation threshold interval, it is determined that the operation is in violation.

[0012] Optionally, judging whether the operation is illegal according to the current value in the current loop further includes:

[0013] The number of changes of the current value in the current loop within a monitoring stage is obtained, and when the number of changes is inconsistent with the number threshold, the operation is determined to be in violation; the number of changes of the current value in the current loop is the number of times the current value in the current loop increases from less than the current threshold to greater than the current threshold.

[0014] Optionally, it also includes:

[0015] A first button module, configured to generate a first switching instruction according to a first user action, and send the first switching instruction to the control module;

[0016] The control module is further configured to switch between a learning mode and a monitoring mode according to the first switching instruction.

[0017] Optionally, the current value in the current circuit of the electric batch includes the current value in the current circuit when the electric batch rotates without load;

[0018] The control module is also used for:

[0019] In the learning mode, reference data is obtained, wherein the reference data includes a current threshold, a maximum threshold of an increase value, a minimum threshold of an increase value, an average threshold interval, and a standard deviation threshold interval;

[0020] The method for obtaining the current threshold comprises:

[0021] The current threshold is set according to the current value in the current loop when the electric batch rotates at no load.

[0022] Optionally, the reference data includes reference data corresponding to one or more torque modes;

[0023] When the reference data includes reference data corresponding to a plurality of torque modes, the detection system further includes:

[0024] A second button module, used for generating a second switching instruction according to a second user action, and sending the second switching instruction to the control module;

[0025] The control module is also used for:

[0026] In the learning mode, different torque modes are switched according to the second switching instruction, and reference data corresponding to the torque mode is stored in the storage module;

[0027] In the monitoring mode, different torque modes are switched according to the second switching instruction, and reference data corresponding to the torque mode is obtained from the storage module.

[0028] Optionally, the current detection module includes:

[0029] A sampling unit, connected in series to the current loop of the electric batch in the operated state;

[0030] A voltage collection unit, connected to the sampling unit, and used to collect the voltage difference between the two ends of the sampling unit;

[0031] A current value calculation unit is used to calculate the current value in the current loop according to the voltage difference.

[0032] Optionally, the current detection module further includes:

[0033] The amplification unit is connected to the voltage collection unit and is used to amplify the voltage difference between the two ends of the sampling unit.

[0034] According to another aspect of the present invention, there is provided an operation detection method applied to an electric batch, comprising:

[0035] Detecting the current value of the electric batch in an operated state, the current value being the current value in the current loop of the electric batch;

[0036] In the monitoring mode, whether the operation is illegal is determined according to the current value in the current loop.

[0037] An operation detection system and method provided in the embodiments of the present application can determine whether an operation is in violation of regulations by the current value in the current circuit of the electric batching machine, so that the staff can promptly detect the products produced by the illegal operation, and can promptly and effectively discover defective products, thereby avoiding quality risks and customer complaints that may be caused after the defective products are put on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Further details, features and advantages of the invention are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0039] Figure 1 A schematic block diagram of an operation detection system according to an exemplary embodiment of the present invention is shown;

[0040] Figure 2 A schematic diagram of a scene of an operation detection system according to an exemplary embodiment of the present invention is shown;

[0041] Figure 3 A schematic circuit diagram of an operation detection system according to an exemplary embodiment of the present invention is shown;

[0042] Figure 4 A schematic diagram of the working process of an operation detection system according to an exemplary embodiment of the present invention is shown;

[0043] Figure 5 A flow chart of an operation detection method according to an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0044] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0045] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0046] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0047] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0048] The names of the messages or information exchanged between devices are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0049] The following describes the solution of the present invention with reference to the accompanying drawings. The exemplary embodiment of the present invention provides an operation detection system 1100, which is applied to an electric screwdriver, such as Figure 1 As shown, it includes a current detection module 1101 and a control module 1102. The current detection module 1101 is used to detect the current value of the electric batch in the operated state, and the current value of the electric batch is the current value in the current loop of the electric batch; the control module 1102 is used to determine whether the operation is illegal according to the current value in the current loop in the monitoring mode.

[0050] In this embodiment, the current value in the current loop of the electric batch can be used to determine whether the operation is illegal, so that the staff can promptly detect the products produced by the illegal operation, and can promptly and effectively find defective products, avoiding the quality risk hazards and customer complaints that may be caused by the defective products being put on the market. This embodiment realizes the precise monitoring of the production and assembly structural parts, eliminating the uncontrollable judgment factors caused by human negligence.

[0051] During the operation of the electric screwdriver, if the force of controlling the electric screwdriver is too great, it will cause the upper screws to slip or even cause the assembled components to deform and damage. If the force is too small, it will cause incomplete assembly and even affect product performance, resulting in the production of defective products.

[0052] In some implementations, judging whether an operation is illegal according to a current value in a current loop includes:

[0053] A current increase value of a current value in a current loop during a monitoring phase is obtained, and when the current increase value is greater than a maximum increase value threshold or less than a minimum increase value threshold, an operation violation is determined.

[0054] The current rise value refers to the difference between the maximum current value and the minimum current value within a period of time. In this embodiment, in a monitoring stage, when the electric screwdriver rotates without load, the current value is the minimum, and the current value is set to A. When the electric screwdriver is loaded with screws, the current value will have a maximum current value point, and the current value of the maximum point is set to B. The difference between B and A is the current rise value of the detection stage.

[0055] The highest threshold of the increase value and the lowest threshold of the increase value may be obtained based on experience, experimental data, or historical values, which is not limited in this embodiment.

[0056] In this embodiment, the force of the electric batch can be monitored and controlled by the current value in the current loop of the electric batch. When the force of controlling the electric batch is large, the current value in the current loop of the electric batch is correspondingly large. When the force of controlling the electric batch is small, the current value in the current loop of the electric batch is correspondingly small. When the current increase value is greater than the maximum increase value threshold, it indicates that there is an operation of controlling the electric batch with too much force during the monitoring stage, and the operation is judged to be illegal; when the current increase value is less than the minimum increase value threshold, it indicates that there is an operation of controlling the electric batch with too little force during the monitoring stage, and the operation is judged to be illegal, which helps to find defective products in time.

[0057] During the operation of the electric screwdriver, if the angle of the electric screwdriver is controlled incorrectly, the screw and nut will not match well or the screw will be tilted, which will lead to the production of defective products.

[0058] In some other implementations, judging whether the operation is in violation of the rules according to the current value in the current loop further includes:

[0059] When the current increase value is greater than or equal to the minimum increase value threshold and less than the maximum increase value threshold, the current average value and / or the current standard deviation of the current value in the current loop within a monitoring stage are obtained. When the current average value is not within the average value threshold interval and / or the current standard deviation is not within the standard deviation threshold interval, it is determined that the operation is in violation.

[0060] The mean value threshold interval and the standard deviation threshold interval may be obtained based on empirical values, experimental data, or historical values, which is not limited in this embodiment.

[0061] When the angle of controlling the electric screwdriver is incorrect, jitter will occur during the operation of the electric screwdriver, causing the current value in the current circuit of the electric screwdriver to fluctuate. In this embodiment, when the force of operating the electric screwdriver is not in violation of the rules, whether jitter occurs is determined by the current average value and / or the current standard deviation. When the current average value is not within the average value threshold interval and / or the current standard deviation is not within the standard deviation threshold interval, it indicates that the electric screwdriver is jittering, which further indicates that the angle of controlling the electric screwdriver is incorrect, and the operation is determined to be in violation, which helps to find defective products in a timely and effective manner.

[0062] During a monitoring phase, when operating an electric screwdriver to install multiple components, insufficient or missed installation may occur, resulting in the production of defective products.

[0063] In some other implementations, judging whether the operation is in violation of the rules according to the current value in the current loop further includes:

[0064] The number of changes of the current value in the current loop in a monitoring phase is obtained, and when the number of changes is inconsistent with the number threshold, the operation is determined to be illegal. The number of changes of the current value in the current loop is the number of times the current value in the current loop increases from less than the current threshold to greater than the current threshold.

[0065] The number threshold is the number of components that need to be installed for the product.

[0066] In this embodiment, when the electric screwdriver is rotating at no-load, the current value is the smallest. When the electric screwdriver is loading, the current value increases. The number of changes, that is, the number of times the electric screwdriver increases from less than the current threshold to more than the current threshold, indicates the number of times the electric screwdriver is loaded. When the number of times the electric screwdriver is loaded is less than the number threshold, it indicates that too many components are installed; when the number of times the electric screwdriver is loaded is greater than the number threshold, it indicates that too many components are installed. This embodiment helps to timely and effectively discover products with insufficient or missing components by monitoring the number of times the electric screwdriver is loaded.

[0067] In some other embodiments, the operation detection system 1100 further includes a first button module, which is used to generate a first switching instruction according to a first user action and send the first switching instruction to the control module 1102. The control module 1102 is also used to switch between the learning mode and the monitoring mode according to the first switching instruction. The first user action can be a short press action, a long press action, etc.

[0068] As an implementation method, Figure 2 As shown, the first button module includes a button A, and the button A is used to obtain a first switching instruction generated by a short press action and send the first switching instruction to the control module 1102.

[0069] In some further embodiments, the current value in the current circuit of the electric batch includes the current value in the current circuit when the electric batch rotates at no-load.

[0070] The control module 1102 is also used to obtain reference data in the learning mode, where the reference data includes a current threshold, a maximum threshold of an increase value, a minimum threshold of an increase value, an average threshold interval, and a standard deviation threshold interval.

[0071] The method for obtaining the current threshold value includes setting the current threshold value according to the current value in the current loop when the electric screwdriver rotates without load. As an implementation, the current value in the current loop when the electric screwdriver rotates without load plus a preset margin can be set as the current threshold value.

[0072] Among them, when the electric screwdriver rotates at no load, the current value is the smallest, and when the electric screwdriver is loaded, the current value increases. Setting the current threshold according to the current value in the current circuit when the electric screwdriver rotates at no load can effectively indicate the number of load times.

[0073] In yet other embodiments, the reference data includes reference data corresponding to one or more torque modes.

[0074] When obtaining reference data in the learning mode, it is necessary to ensure that it complies with the standard specifications for the behavior of the electric screwdriver assembly structural parts. The operator first determines the applicable electric screwdriver torque mode, and then idles for 3 to 5 seconds without load. The current value of the electric screwdriver when it is rotating without load must be used as the current threshold. The threshold value when there is a load change cannot be used as a comparison standard to avoid unstable threshold judgments due to multiple load changes, which may lead to system misjudgment in the monitoring mode. Subsequently, the entire assembly operation is completed on the single prototype to ensure that a complete current curve is obtained as the judgment standard in the monitoring mode. The control module analyzes and processes the complete current curve obtained by sampling to obtain reference data.

[0075] In this embodiment, the operator continuously samples the current value flowing through the electric screwdriver during the operation of the electric screwdriver, and compares it with the reference data in the normal operating standard mode to monitor whether the current on the electric screwdriver is within the normal standard range, thereby realizing intelligent detection and avoiding potential quality risks caused by human subjective factors.

[0076] When the reference data includes reference data corresponding to multiple torque modes, the detection system 1100 further includes a second button module, which is used to generate a second switching instruction according to a second user action and send the second switching instruction to the control module 1102. The second user action can be a short press action, a long press action, etc.

[0077] The control module 1102 is further configured to switch different torque modes according to the second switching instruction in the learning mode, and store reference data corresponding to the torque mode in the storage module;

[0078] The control module 1102 is further configured to switch to different torque modes according to the second switching instruction in the monitoring mode, and obtain reference data corresponding to the torque mode from the storage module.

[0079] As an implementation method, Figure 2 As shown, the second button module includes a button B, and the button B is used to generate a second switching instruction according to a short press action and send the second switching instruction to the control module 1102.

[0080] The reference data set includes reference data corresponding to three torque modes, namely data group one, data group two and data group three. Data group one corresponds to torque mode one, data group two corresponds to torque mode two, and data group three corresponds to torque mode three.

[0081] Press button A to make the control module 1102 enter the learning mode, short press button B to select torque mode 1, obtain data group 1 and store it in the storage module; press button B to switch to torque mode 2, obtain data group 2 and store it in the storage module; press button B to switch to torque mode 3, obtain data group 3 and store it in the storage module.

[0082] Short press button A to put control module 1102 into monitoring mode. Control module 1102 obtains the current value in the current loop as monitoring data through current detection module 1101. The monitoring data corresponding to torque mode 1 is monitoring group 1, the monitoring data corresponding to torque mode 2 is monitoring group 2, and the monitoring data corresponding to torque mode 3 is monitoring group 3. Short press button B to select torque mode 1, obtain data group 1 from the storage module, and compare data group 1 with monitoring group 1 to determine whether the operation is in violation of regulations; press button B to switch to torque mode 2, obtain data group 2 from the storage module, and compare data group 2 with monitoring group 2 to determine whether the operation is in violation of regulations; press button B to switch to torque mode 3, obtain data group 3 from the storage module, and compare data group 3 with monitoring group 3 to determine whether the operation is in violation of regulations.

[0083] In this embodiment, in order to facilitate adaptation to different application assembly environments of electric screwdrivers, multiple sets of data memory functions are provided, which can record reference data and monitoring data corresponding to various torque modes, thereby facilitating switching in different application scenarios.

[0084] In the monitoring mode, the operation detection system 1100 scans the SN code of the prototype and transmits it to the PC to successfully enter the prototype information and then enter the information of the next prototype as a monitoring stage. When the prototype enters the assembly stage, the system starts to monitor the prototype after receiving the successful information entered by the PC. Then the operator can assemble it normally using the electric screwdriver. The system will continuously monitor and record the changes in the current flowing through the electric screwdriver. When the monitored current does not meet the standard value obtained by sampling in the learning mode, different phenomenon prompts will be given according to different abnormal situations.

[0085] As an example, if the assembly post needs to complete the assembly of four screws for a single prototype, then in the learning mode, a one-time sampling is required to complete the assembly of the four screws, so that the system continuously samples to obtain the complete current change value. After the normal sampling standard value is successfully obtained, the corresponding monitoring mode is entered. The subsequent assembly process operation detection system 1100 continuously samples the current flowing through the electric screwdriver and compares it with the sampling standard value. When the detection current is greater than the current threshold, does not exceed the maximum value of the preset current rise value, the current change does not exceed the standard deviation threshold of the preset current size, and the number of current changes in the entire detection process is equal to the number in the learning mode (in the learning mode, the process of recording the installation of four screws will have four transformation processes greater than the current threshold, and the same number of transformations should also be detected in the monitoring mode to determine whether the assembly process is insufficient or missed), then this monitoring process is recorded as "qualified", and it is considered that the screw assembly meets the specified requirements.

[0086] In other embodiments, the operation detection system 1100 includes a mode indicator light and a status indicator light. The mode indicator light is used to display the working mode of the control module 1102. The working mode includes a learning mode and a monitoring mode. The status indicator light is used to display the selected torque mode.

[0087] As an implementation mode, the mode indicator light includes a yellow indicator light. When the control module 1102 enters the learning mode, the yellow indicator light is on. The status indicator light includes one or more three blue indicator lights corresponding to the torque mode. When a certain torque mode is selected, the corresponding blue indicator light is on. For example, the reference data includes data group one, data group two and data group three. Data group one corresponds to torque mode one, data group two corresponds to torque mode two, and data group three corresponds to torque mode three. The torque mode is selected by pressing button B. Each time a blue indicator light is pressed, the number of lights corresponding to torque modes one, two, and three is full three cycles.

[0088] In some other embodiments, button B is also used to generate an elimination instruction according to a third user action, and the control module 1102 is also used to eliminate the reference data corresponding to the selected torque mode according to the elimination instruction. The third user action can be a short press action, a long press action, etc. In this embodiment, it can be a long press action of 3 to 5 seconds. After the reference data is eliminated, it can be re-entered. After the entry is completed, the monitoring mode can be switched to by button A, and the data group to be monitored and compared can be selected by button B as the comparison standard in the monitoring mode.

[0089] In some other embodiments, the control module 1102 is also used to determine whether reference data corresponding to the selected torque mode is stored in the storage module. When reference data corresponding to the selected torque mode is stored in the storage module, the reference data corresponding to the torque mode is obtained; otherwise, the control status indicator light prompts that reference data is missing.

[0090] In some other embodiments, the current detection module 1101 includes a sampling unit, a voltage acquisition unit and a current value calculation unit. The sampling unit is connected in series to the current loop of the electric batch in the operated state; the voltage acquisition unit is connected to the sampling unit to acquire the voltage difference between the two ends of the sampling unit; and the current value calculation unit is used to calculate the current value in the current loop according to the voltage difference.

[0091] As an implementation, the current detection module 1101 further includes an amplification unit, which is connected to the voltage acquisition unit and is used to amplify the voltage difference between the two ends of the sampling unit. The current value calculation unit is used to calculate the current value in the current loop according to the amplified voltage difference.

[0092] As an example, Figure 3As shown, the sampling unit includes a sampling resistor, and the sampling resistor may include one or more resistors. The sampling resistor is connected in series to the current loop of the electric batch in the operated state. The voltage acquisition unit and the amplification unit are arranged in a high-side current detection chip, and the high-side current detection chip includes a chip of model AMX4080. The IN+ pin and the IN- pin of the high-side current detection chip are respectively connected to the two ends of the sampling resistor, and the voltage difference between the two ends of the sampling resistor is collected and amplified, and finally output to the current value calculation unit. The current value calculation unit and the control module 1102 are arranged in a single-chip microcomputer, and the single-chip microcomputer includes a 51 single-chip microcomputer, etc.

[0093] Since the function of the sampling resistor is to convert the current change flowing through the screwdriver into a voltage change, the resistance value should not be too large to cause an increase in useless power consumption. Selecting a small resistance will make the common-mode voltage at both ends of the sampling close to the operating voltage of the screwdriver. The operating voltage of the screwdriver is relatively large and cannot be directly connected to the ADC pin of the microcontroller. In this example, it is connected after conversion through a high-side current detection chip.

[0094] In this example, the sampling resistor converts the current change flowing through the electric batch into a voltage change, and the high-side current detection chip can amplify the sampling voltage change to achieve highly integrated, simple, accurate and compact current detection. The single-chip microcomputer also includes an ADC module, which is used to convert the analog signal voltage difference into a digital signal voltage difference and transmit it to the current value calculation unit. The current value calculation unit calculates the current value of the electric batch Isense = Vout / GAIN / Rsense, where Vout is the amplified voltage difference, GAIN is the gain of the amplification unit, and Rsense is the resistance of the sampling resistor.

[0095] In some other embodiments, the operation detection system 1100 further includes an alarm module. When there is an illegal operation, the control module 1102 controls the alarm module to issue an alarm prompt.

[0096] As an implementation method, the alarm module includes a buzzer and a red indicator light. When the force of controlling the electric screwdriver is too large during the monitoring stage, the red indicator light is triggered to be long-on and accompanied by a rapid buzzer alarm; when the force of controlling the electric screwdriver is too small during the monitoring stage, the red indicator light is triggered to be long-on and accompanied by a soothing buzzer alarm; when components are insufficiently installed or missed, the red indicator light flashes and accompanied by a rapid buzzer alarm.

[0097] In order to better understand the embodiments of the present disclosure, an example is given for illustration. Figure 4 As shown:

[0098] The operator enters the learning mode by pressing button A and selects the torque mode by pressing button B. For the convenience of description, taking torque mode 1 as an example, the reference data corresponding to torque mode 1 is data set 1. The control module 1102 determines whether data set 1 is stored in the storage module. When data set 1 is not stored, the current value of the current loop when the operator uses the electric screwdriver according to the operating specification is sampled to obtain data set 1 and store it in the storage module. When data set 1 is stored in the storage module, the operator can delete the reference data by pressing button B for a long time, and the current value of the current loop when the operator uses the electric screwdriver according to the operating specification is sampled to obtain data set 1.

[0099] The operator switches to the monitoring mode by pressing button A, and selects the torque mode by pressing button B. For the convenience of description, taking torque mode 1 as an example, the reference data corresponding to the torque mode is data group 1, and the corresponding monitoring data is monitoring group 1. The control module 1102 monitors whether data group 1 is stored in the storage module. When data group 1 is not stored in the storage module, the operator can switch to the learning mode by pressing button A; when data group 1 is stored in the storage module, the monitoring group 1 and data group 1 are analyzed to determine whether the operation is illegal. When there is no illegal operation, it is determined that there is no abnormality and the monitoring result is passed.

[0100] Check the products corresponding to the illegal operation and reassemble them to ensure that there are no problems with the product assembly. Only after ensuring that there are no problems with the assembly can the PC confirm the flow into the next link, and the abnormal situation will also be synchronously transmitted to the PC for record, which is convenient for subsequent problem tracing. If there is no prototype information entry link in the assembly process, it can be replaced by button C. Before the prototype is assembled, you need to press button C once to replace the information entry link. Please note that this replacement method cannot bind the abnormal problem to the corresponding prototype later. Through communication with the PC, the corresponding assembly status of each prototype with an SN code can be recorded, which is convenient for the location and tracing of subsequent problems.

[0101] The exemplary embodiment of the present invention also provides an operation detection method, such as Figure 5 As shown, the steps include:

[0102] S1, detecting the current value of the electric batch in the operated state, the current value of the electric batch is the current value in the current loop of the electric batch;

[0103] S2, in monitoring mode, determines whether the operation is illegal based on the current value in the current loop.

[0104] In some implementations, judging whether an operation is illegal according to a current value in a current loop includes:

[0105] A current increase value of a current value in a current loop during a monitoring phase is obtained, and when the current increase value is greater than a maximum increase value threshold or less than a minimum increase value threshold, an operation violation is determined.

[0106] In some other implementations, judging whether the operation is in violation of the rules according to the current value in the current loop further includes:

[0107] When the current increase value is greater than or equal to the minimum increase value threshold and less than the maximum increase value threshold, the current average value and / or the current standard deviation of the current value in the current loop within a monitoring stage are obtained. When the current average value is not within the average value threshold interval and / or the current standard deviation is not within the standard deviation threshold interval, it is determined that the operation is in violation.

[0108] In some further implementations, judging whether the operation is in violation of the rules according to the current value in the current loop further includes:

[0109] The number of changes of the current value in the current loop within a monitoring phase is obtained. When the number of changes is inconsistent with the number threshold, the operation is determined to be in violation. The number of changes of the current value in the current loop is the number of times the current value in the current loop increases from less than the current threshold to greater than the current threshold.

[0110] In some further embodiments, it further comprises:

[0111] A first switching instruction is generated according to the first user action, and switching between the learning mode and the monitoring mode is performed according to the first switching instruction.

[0112] In some further embodiments, the current value in the current circuit of the electric batch includes the current value in the current circuit when the electric batch rotates at no-load.

[0113] The operation detection method also includes:

[0114] In the learning mode, reference data is obtained, and the reference data includes a current threshold, a maximum threshold of an increase value, a minimum threshold of an increase value, an average value threshold interval, and a standard deviation threshold interval.

[0115] The method for obtaining the current threshold includes:

[0116] The current threshold is set according to the current value in the current loop when the electric batch rotates at no load.

[0117] In yet other embodiments, the reference data includes reference data corresponding to one or more torque modes;

[0118] When the reference data includes reference data corresponding to a plurality of torque modes, the operation detection method further includes:

[0119] generating a second switching instruction according to a second user action;

[0120] In the learning mode, different torque modes are switched according to the second switching instruction, and reference data corresponding to the torque mode is stored in the storage module;

[0121] In the monitoring mode, different torque modes are switched according to the second switching instruction, and reference data corresponding to the torque mode is obtained from the storage module.

[0122] In some other embodiments, step S1 is implemented by a current detection mode, and the current detection module 1101 includes a sampling unit, a voltage acquisition unit, and a current value calculation unit. The sampling unit is connected in series to the current loop of the electric batch in an operated state; the voltage acquisition unit is connected to the sampling unit to acquire the voltage difference between the two ends of the sampling unit; and the current value calculation unit is used to calculate the current value in the current loop according to the voltage difference.

[0123] As an implementation manner, the current detection module 1101 further includes:

[0124] The amplification unit is connected to the voltage collection unit and is used to amplify the voltage difference between the two ends of the sampling unit.

[0125] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An operation detection system, applied to electric screwdriver, characterized in that: include: A current detection module, used to detect the current value of the electric batch in an operated state, the current value of the electric batch being the current value in the current loop of the electric batch; A control module, used for determining whether an operation is in violation of regulations according to a current value in the current loop in a monitoring mode; Judging whether the operation is in violation of the regulations according to the current value in the current loop includes: Obtain the difference between the maximum current value and the minimum current value in the current loop during a monitoring phase to obtain a current increase value, and determine that the operation is in violation when the current increase value is greater than a maximum increase value threshold or less than a minimum increase value threshold; wherein the minimum current value is the current value when the electric batch rotates at no load during the monitoring phase; When the current increase value is greater than or equal to the minimum increase value threshold and less than the maximum increase value threshold, obtain the current standard deviation of the current value in the current loop in a monitoring stage, and when the current standard deviation is not within the standard deviation threshold range, determine that the angle of the control electric batch is incorrect; The number of changes of the current value in the current loop within a monitoring stage is obtained. When the number of changes is inconsistent with the number threshold, it is determined that fewer or more components are installed; the number of changes of the current value in the current loop is the number of times the current value in the current loop increases from less than the current threshold to greater than the current threshold.

2. The operation detection system according to claim 1, characterized in that: Also includes: A first button module, configured to generate a first switching instruction according to a first user action, and send the first switching instruction to the control module; The control module is further configured to switch between a learning mode and a monitoring mode according to the first switching instruction.

3. The operation detection system according to claim 1, characterized in that: The current value in the current circuit of the electric batch includes the current value in the current circuit when the electric batch rotates without load; The control module is also used for: In the learning mode, reference data is obtained, wherein the reference data includes a current threshold, a maximum threshold of an increase value, a minimum threshold of an increase value, an average threshold interval, and a standard deviation threshold interval; The method for obtaining the current threshold comprises: The current threshold is set according to the current value in the current loop when the electric batch rotates at no load.

4. The operation detection system according to claim 3, characterized in that: The reference data includes reference data corresponding to one or more torque modes; When the reference data includes reference data corresponding to a plurality of torque modes, the detection system further includes: A second button module, used for generating a second switching instruction according to a second user action, and sending the second switching instruction to the control module; The control module is also used for: In the learning mode, different torque modes are switched according to the second switching instruction, and reference data corresponding to the torque mode is stored in the storage module; In the monitoring mode, different torque modes are switched according to the second switching instruction, and reference data corresponding to the torque mode is obtained from the storage module.

5. The operation detection system according to claim 1, characterized in that: The current detection module comprises: A sampling unit, connected in series to the current loop of the electric batch in the operated state; A voltage collection unit, connected to the sampling unit, and used to collect the voltage difference between the two ends of the sampling unit; A current value calculation unit is used to calculate the current value in the current loop according to the voltage difference.

6. The operation detection system according to claim 5, characterized in that: The current detection module also includes: The amplification unit is connected to the voltage collection unit and is used to amplify the voltage difference between the two ends of the sampling unit.

7. An operation detection method, applied to an electric screwdriver, characterized in that: include: Detecting the current value of the electric batch in an operated state, the current value being the current value in the current loop of the electric batch; In the monitoring mode, judging whether the operation is in violation of the regulations according to the current value in the current loop; Judging whether the operation is in violation of the regulations according to the current value in the current loop includes: Obtain the difference between the maximum current value and the minimum current value in the current loop during a monitoring phase to obtain a current increase value, and determine that the operation is in violation when the current increase value is greater than a maximum increase value threshold or less than a minimum increase value threshold; wherein the minimum current value is the current value when the electric batch rotates at no load during the monitoring phase; When the current increase value is greater than or equal to the minimum increase value threshold and less than the maximum increase value threshold, obtain the current standard deviation of the current value in the current loop in a monitoring stage, and when the current standard deviation is not within the standard deviation threshold range, determine that the angle of the control electric batch is incorrect; The number of changes of the current value in the current loop within a monitoring stage is obtained. When the number of changes is inconsistent with the number threshold, it is determined that fewer or more components are installed; the number of changes of the current value in the current loop is the number of times the current value in the current loop increases from less than the current threshold to greater than the current threshold.

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