Integrated safety monitoring system for electrical equipment

Abstract

The present invention relates to the technical field of safety monitoring systems, and specifically to an integrated safety monitoring system for electrical equipment, comprising a power supply module, an electric tool, a bracket and a control console. The console is provided with a safety and module, and the safety and module comprises an internal power supply module, a bracket monitoring module, a hands-off monitoring module and a control module. The control module is connected to a power switch via first, second and third isolation drive circuits connected in series; the first isolation drive circuit is connected to the hands-off monitoring module, the second isolation drive circuit is connected to the bracket monitoring module, and the third isolation drive circuit is connected to the internal power supply module; the transformer input is connected to the power supply module and the power switch; the power supply energy transmission module input is connected to the transformer output and the power supply module, and the output is connected to the power supply circuit of the electric tool, the bracket monitoring module and the hands-off monitoring module; the system can ensure that in the event of a fault or abnormal state, the electric tool is not turned on and is always directed to the safe side during operation.

Description

Technical Field

[0001] The invention relates to the technical field of safety monitoring systems, in particular to an integrated safety monitoring system for electrical equipment. Background Art

[0002] In work and production, electric tools are widely used. Through manual operation, many complex tasks or emergency tasks that cannot be completed by automated machinery can be completed, including but not limited to electric soldering irons, hot air guns, arc welding tongs, hair dryers, electric engraving knives, ultrasonic engraving knives, ion air guns, etc.; However, when the operator leaves the tool and the tool is still in the working state and is not in standby or stopped, some safety accidents may usually occur. In actual use, these devices usually have the following problems: 1. These devices usually provide functions such as high temperature, high-speed rotation, and high voltage. They should stop when not operated by human hands. If the personnel leave and forget to turn on the pipe wall switch, the tool will still be in operation, which will bring safety problems; 2. In the prior art, a single working time is usually controlled by a controller to avoid the danger caused by electrical failure due to long-term working. However, it is not possible to immediately stop or enter standby mode after a person lets go of the device during a single working time, and there are still safety issues in use. 3. The existing technology does not take into account the problem of protection circuit failure. When the protection circuit fails, it is impossible to stop the power tool from running or stopping heating in time, and the safety level is low. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an integrated safety monitoring system for electrical equipment that can prevent safety hazards caused by high temperature, high-speed rotation, high voltage and other functions of electric tools when unattended.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A safety monitoring system for an integrated electrical device comprises a power supply module for power supply, an electric tool and a bracket for placing the electric tool, and also comprises a control console, wherein a corresponding safety and module is provided in the control console corresponding to each group of electric tools and brackets, and the safety and module comprises a bracket monitoring module for detecting whether the electric tool is placed on the bracket; a hands-off monitoring module arranged in the electric tool for detecting whether the electric tool is out of hand; a control module, wherein the control module is connected to a power switch via a first isolation drive circuit, a second isolation drive circuit and a third isolation drive circuit arranged in series; an input of the first isolation drive circuit is connected to the hands-off monitoring module, and an input of the second isolation drive circuit is connected to the bracket monitoring module; an internal power supply module, wherein an input is connected to the power supply module, and an output is connected to the control module, the first isolation drive circuit, the second isolation drive circuit and the third isolation drive circuit; a transformer, wherein an input is connected to the power supply module and a power switch; a power supply energy transmission module, wherein an input is connected to a transformer output and the power supply module, and an output is connected to the power supply circuit of the electric tool, the bracket monitoring module and the hands-off monitoring module, wherein the power supply module output supplies power to the bracket monitoring module and the hands-off monitoring module, and the transformer output supplies power to the power supply circuit of the electric tool.

[0005] Preferably, a further technical solution of the present invention is: Preferably, the bracket monitoring module includes a bracket sensor transmitting end and a bracket sensor receiving end, the bracket sensor transmitting end is arranged in the bracket, and the bracket sensor receiving end is arranged in the electric tool. After the electric tool is placed on the bracket, the bracket sensor receiving end transmits the received signal to the second isolation drive circuit.

[0006] Preferably, the hands-off monitoring module includes a plurality of capacitive sensors, a signal processing module and a data analysis and processing module. The plurality of capacitive sensors are installed on the handle of the power tool at circumferential intervals. The plurality of capacitive sensors are connected to the signal processing module. The output of the signal processing module is connected to the data analysis and processing module. The output of the data analysis and processing module is connected to the first isolation drive circuit.

[0007] Preferably, at least four capacitive sensors are provided, and when greater than or equal to 2 / 3 of the capacitive sensors detect a capacitance change, the data analysis and processing module controls the output of a first start signal to the first isolation drive circuit.

[0008] Preferably, a feedback isolation circuit is further included, and the output end of the transformer is connected to the control module via the feedback isolation circuit.

[0009] Preferably, the first isolation driving circuit outputs a first state recovery signal, and the second isolation driving circuit outputs a first state recovery signal; the first state recovery signal is used to drive the hand-off state display light or transmit it back to the control module, and the second state recovery signal is used to drive the bracket state display light or transmit it back to the control module.

[0010] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: This system can ensure that the power supply circuit of the power tool is not turned on when there is a circuit failure or abnormal state (no hand grip). The system always guides the power tool to the safe side during operation, avoiding safety hazards caused by factors such as heating or high-speed rotation of the power tool. The specific functions are as follows: 1. When the electric tool is placed in the bracket, the bracket monitoring module detects that the electric tool is placed in the bracket, the second isolation drive circuit will not receive the second start signal, the second isolation drive circuit has no output, the first isolation drive circuit, the second isolation drive circuit, and the third isolation drive circuit connected in parallel in the safety module have no output, and the power switch cannot be driven to output a pulse signal of a certain frequency, and the electric tool enters a shutdown or standby state; 2. When the power tool is not placed in the bracket, but less than 2 / 3 of the capacitance sensors detect capacitance changes, the first isolation drive circuit has no output and cannot drive the power switch in the safety and module to output a pulse signal of a certain frequency, and the power tool enters the shutdown or standby state; 3. When a short circuit or open circuit occurs inside the safety and module, the power switch in the safety and module cannot be driven to output a pulse signal of a certain frequency, and the power tool enters the shutdown or standby state. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the safety module in an embodiment of the present invention; Figure 2 is a safety and module workflow diagram in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of a wireless charging transmitting module and a wireless charging receiving module in an embodiment of the present invention; Figure 4 is a schematic diagram of the circuit structure of a first isolation driving circuit in an embodiment of the present invention; Figure 5 is a schematic diagram of the circuit structure of a third isolation drive circuit in an embodiment of the present invention; Figure 6 is a schematic diagram of the circuit structure of a control module in an embodiment of the present invention; Figure 7 It is a schematic diagram of the circuit structure of the power switch according to an embodiment of the present invention.

[0012] Explanation of the accompanying drawings: 1. Power supply module; 2. Internal power supply module; 3. Control module; 4. Hand-off monitoring module; 5. First isolation drive circuit; 6. Second isolation drive circuit; 7. Third isolation drive circuit; 8. Power switch; 9. Transformer; 10. Power supply and energy transmission module; 11. Bracket monitoring module; 12. Feedback isolation circuit; 14. Converter; 15. Bridge circuit; 16. Transmitting coil; 17. Receiving coil. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0014] like Figure 1 , Figures 4 to 6As shown, the present embodiment provides an integrated safety monitoring system for electrical equipment, including a power supply module 1 for power supply, an electric tool and a bracket for placing the electric tool, the power supply module 1 for power supply can use AC power or a battery, and also includes a console, in which a corresponding safety and module is provided for each group of electric tools and brackets, and the safety and module includes a bracket monitoring module 11 for detecting whether the electric tool is placed on the bracket; a hand-off monitoring module 4, which is arranged in the electric tool, and is used to detect whether the electric tool is out of hand; a control module 3, and the control module 3 is connected to a power switch 8 through a first isolation drive circuit 5, a second isolation drive circuit 6, and a third isolation drive circuit 7 arranged in series; the first isolation The input of the isolation drive circuit 5 is connected to the hand-off monitoring module 4, and the input of the second isolation drive circuit 6 is connected to the bracket monitoring module 11; the input of the internal power supply module 2 is connected to the power supply module 1, and the output is connected to the control module 3, the first isolation drive circuit 5, the second isolation drive circuit 6, and the third isolation drive circuit 7; the input of the transformer 9 is connected to the power supply module 1 and the power switch 8; the power supply transmission module 10, the input is connected to the output of the transformer 9 and the power supply module 1, and the output is connected to the power supply circuit of the power tool, the bracket monitoring module 11, and the hand-off monitoring module 4, the output of the power module 1 supplies power to the bracket monitoring module 11 and the hand-off monitoring module 4, and the output of the transformer 9 supplies power to the power supply circuit of the power tool. The power supply transmission module 10 is equipped with an energy power supply transmission control chip, and according to the preset logic, it is connected to the power supply circuit of the power tool only when the transformer 9 outputs AC power; otherwise, it only supplies power to the bracket monitoring module 11 and the hand-off monitoring module 4. Among them, the power module is connected to the transformer, the internal power supply module, and the power supply transmission module through a rectifier and filter circuit. In this embodiment, the main control chip of the control module 3 can be UC2843, the first isolation drive circuit 5 and the second isolation drive circuit 6 can be MOCD207R2M optical coupling clutch, the first isolation drive circuit 5 can be ACPL-P346-060E gate drive photoelectric coupler, and the power switch 8 can be mosfet, such as FDMS86104; the internal power supply module 2 circuit is as follows Figure 7 shown.

[0015] It should be noted that if Figure 3 As shown, one console can control multiple groups of power tools and brackets, and each group of power tools and brackets is equipped with corresponding safety and modules.

[0016] like Figure 2As shown, the working process of the system is as follows: every preset certain time period (in this embodiment, this time period is preset to 2 minutes), the hand-off monitoring module 44 is used to determine whether the power tool is released from the hand; if so, the bracket monitoring module 11 is used to determine whether it enters the bracket; if so, the system enters the standby mode, and after a preset delay time (set to 10 minutes in this embodiment), the power supply circuit of the power tool is powered off; if it does not enter the bracket, the power supply circuit of the power tool is immediately powered off; when the power tool is in the hand, the bracket monitoring module 11 is used to determine whether it enters the bracket; if it enters the bracket, the system fails and the power supply circuit of the power tool is immediately powered off; if it does not enter the bracket, a round of judgment is continued every 2 minutes.

[0017] The support monitoring module 11 can be used with sensors that can be thought of by those skilled in the art, such as a gravity monitoring sensor, a magnetic induction proximity switch, or a capacitive proximity switch, etc., which are arranged in the support and used in conjunction with wireless transmission technology. In the present embodiment, taking the capacitive proximity switch as an example, the support monitoring module 11 includes a capacitive proximity switch, a wireless transmitting module, and a wireless receiving module. The capacitive proximity switch is arranged in the support and connected to the wireless transmitting module. The wireless receiving module is arranged in the console, and the input is connected to the wireless transmitting module, and the output is connected to the second isolation drive circuit 6, the wireless transmitting module is connected, and the wireless receiving module is connected. When the electric tool is placed in the support, the capacitive proximity switch transmits a signal of placement through the wireless transmitting module, the wireless receiving module receives the signal and transmits the signal to the second isolation drive circuit 6, and the second isolation drive circuit 6 has an output.

[0018] The hands-off monitoring module 4 includes a plurality of capacitive sensors, a signal processing module and a data analysis and processing module. The plurality of capacitive sensors are installed on the handle of the power tool at intervals in an annular direction. The plurality of capacitive sensors are connected to the signal processing module. The signal processing module receives the signal from the capacitive sensor and performs preliminary processing to amplify the signal, filter out noise, and convert it into a format more suitable for analysis. The signal processing module outputs the processed signal to the data analysis and processing module. The signal processing module distinguishes whether the processed signal is caused by human hands or other interference (such as raindrops) by analyzing the characteristics of the processed signal, such as the amplitude, frequency and duration of the signal. Human hand contact usually produces a signal with a larger amplitude and a specific frequency range, while interference such as raindrops may produce a smaller and more random signal. The output of the data analysis and processing module is connected to the first isolation drive circuit 5. The working principle of the capacitive sensor is common knowledge among those skilled in the art. A capacitor is formed between the capacitor plates and the air. The capacitance value of the capacitor mainly depends on the area of ​​the plates, the distance between the plates and the dielectric constant. Since the dielectric constant is different when there is a human hand, the capacitance value is different, and the change in the capacitance value can be detected.

[0019] At least four capacitive sensors are provided. When 2 / 3 or more of the capacitive sensors detect a change in capacitance, the data analysis and processing module controls the output of a first start signal to the first isolation drive circuit 5. When the number of plate paths with a change in capacitance value is ≥ 2 / 3, it is considered that the hand is gripped. If it is less than 2 / 3, it is considered that the hand is off, making the detection more reliable.

[0020] It also includes a feedback isolation circuit 12 , through which the output end of the transformer 9 is connected to the control module 3 .

[0021] The first isolation driving circuit 5 outputs a first state recovery signal, and the second isolation driving circuit 6 outputs a first state recovery signal; the first state recovery signal is used to drive the hand-off state display light or transmit back to the control module 3, and the second state recovery signal is used to drive the bracket state display light or transmit back to the control module 3. The first state recovery signal and the second state recovery signal can be pulse signals with the same frequency as the input signal, or can be inverted signals thereof.

[0022] This system can ensure that the power supply circuit of the power tool is not turned on when there is a circuit failure or abnormal state (no hand grip). The system always guides the power tool to the safe side during operation, avoiding safety hazards caused by factors such as heating or high-speed rotation of the power tool. The specific functions are as follows: 1. When the electric tool is placed in the bracket, the bracket monitoring module detects that the electric tool is placed in the bracket, the second isolation drive circuit 6 will not receive the second start signal, the second isolation drive circuit 6 has no output, the first isolation drive circuit 5, the second isolation drive circuit 6, and the third isolation drive circuit 7 connected in parallel in the safety module have no output, and the power switch 8 cannot be driven to output a pulse signal of a certain frequency, and the electric tool enters a shutdown or standby state; 2. When the electric tool is not placed in the bracket, but less than 2 / 3 of the capacitance sensors detect capacitance changes, the first isolation drive circuit 5 has no output and cannot drive the power switch 8 in the safety and module to output a pulse signal of a certain frequency, and the electric tool enters a shutdown or standby state; 3. It can ensure that when any sensor fails, it can also cut off the power supply of electrical equipment and stop the equipment to ensure safety.

[0023] The above description is only the preferred embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made by using the contents of the present invention specification and its drawings are included in the scope of rights of the present invention.

Claims

1. An integrated safety monitoring system for electrical equipment, comprising a power module for powering, an electric tool and a bracket for placing the electric tool, characterized in that: It also includes a control console, in which each set of electric tools and brackets is provided with a corresponding safety and module, and the safety and module includes: A bracket monitoring module is used to detect whether the power tool is placed on the bracket; A hands-off monitoring module is provided in the power tool to detect whether the power tool is off the hand; A control module, wherein the control module is connected to a power switch via a first isolation drive circuit, a second isolation drive circuit, and a third isolation drive circuit arranged in series; The first isolation drive circuit input is connected to the hands-off monitoring module, and the second isolation drive circuit input is connected to the bracket monitoring module; An internal power supply module, the input of which is connected to the power supply module, and the output of which is connected to the control module, the first isolation drive circuit, the second isolation drive circuit, and the third isolation drive circuit; Transformer, input is connected with power module and power switch; The power supply and energy transmission module has an input connected to the transformer output and the power module, and an output connected to the power supply circuit of the power tool, the bracket monitoring module, and the hands-off monitoring module. The power module output supplies power to the bracket monitoring module and the hands-off monitoring module, and the transformer output supplies power to the power supply circuit of the power tool.

2. The integrated electrical equipment safety monitoring system according to claim 1, characterized in that: The bracket monitoring module includes a bracket sensor transmitting end and a bracket sensor receiving end. The bracket sensor transmitting end is arranged in the bracket, and the bracket sensor receiving end is arranged in the electric tool. After the electric tool is placed on the bracket, the bracket sensor receiving end transmits the received signal to the second isolation driving circuit.

3. The integrated safety monitoring system for electrical equipment according to claim 1, characterized in that: The hands-off monitoring module includes a plurality of capacitive sensors, a signal processing module and a data analysis and processing module. The plurality of capacitive sensors are installed on the handle of the power tool at circumferential intervals. The plurality of capacitive sensors are connected to the signal processing module. The output of the signal processing module is connected to the data analysis and processing module. The output of the data analysis and processing module is connected to the first isolation drive circuit.

4. The integrated safety monitoring system for electrical equipment according to claim 3, characterized in that: At least four capacitive sensors are provided, and when more than 2 / 3 of the capacitive sensors detect a capacitance change, the data analysis and processing module controls the output of a first start signal to the first isolation drive circuit.

5. The integrated electrical equipment safety monitoring system according to claim 1, characterized in that: It also includes a feedback isolation circuit, through which the output end of the transformer is connected to the control module.

6. The integrated safety monitoring system for electrical equipment according to claim 1, characterized in that: The first isolation driving circuit outputs a first state recovery signal, and the second isolation driving circuit outputs a first state recovery signal; the first state recovery signal is used to drive the hand-off state display light or transmit back to the control module, and the second state recovery signal is used to drive the bracket state display light or transmit back to the control module.

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