Power-off protection device based on voice prompt

Abstract

The invention belongs to the technical field of electrical safety, and particularly relates to a power-off protection device based on voice prompt, which comprises a universal meter in-place detection unit, a test pen in-place detection unit and a voice unit which are connected with a processing control unit, the processing control unit is also connected with an external power supply circuit; the universal meter in-place detection unit detects the in-place information output processing control unit of the universal meter; the electricity testing pen in-place detection unit detects in-place information of the electricity testing meter and outputs the detected in-place information to the processing control unit; when the processing control unit judges that the universal meter is not in place according to detection information of the universal meter in-place detection unit, the voice unit is triggered to give an alarm, and meanwhile an external power supply circuit is controlled to be powered off. And the processing control unit triggers the voice unit to output voice information when judging that the test pen is not in place according to detection information of the test pen in-place detection unit, and controls an external power supply circuit to be powered off. A power supply which may cause danger is actively cut off, and the safety and reliability of electrical operation are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical safety, and particularly relates to a power-off protection device based on voice prompt. Background Art

[0002] In the field of electrical engineering, electrical safety is crucial for ensuring the safety of personnel's lives and the normal operation of equipment. With the wide application of electrical equipment, the safety issues in the electrical operation process have become increasingly prominent. In actual electrical engineering operations, the complexity and rigor of the operation process require extremely high standards. Any reversal of the operation sequence or omission of an operation item is very likely to cause serious accidents. Therefore, in all aspects of electrical construction, detailed and standardized safety regulations have been formulated, imposing strict requirements on power system staff, especially front-line production personnel, to abide by the rules.

[0003] Although detailed regulations for electrical safety operations have been formulated from organizational measures to technical measures, human errors are still difficult to completely avoid in actual operation scenarios. Especially during single-person operations, due to the lack of effective supervision, operators are more likely to make mistakes due to carelessness, which may lead to electric shock accidents.

[0004] Currently, although there are some automatic power-off protection devices on the market, these devices often fail to comprehensively consider various key factors in electrical safety operations. For example, they have deficiencies in detecting the usage status of multimeters and voltage detectors, and cannot effectively monitor and protect the entire operation process. During the actual operation process, once negligence occurs, the existing devices cannot respond promptly and accurately, making it difficult to effectively avoid accidental electric shock accidents. Summary of the Invention

[0005] Aiming at the problem that the existing automatic power-off protection devices have deficiencies in detecting the usage status of multimeters and voltage detectors and cannot effectively monitor and protect the entire operation process, the present invention provides a power-off protection device based on voice prompt.

[0006] The technical solution of the present invention provides a power-off protection device based on voice prompt, including a multimeter in-place detection unit, a voltage detector in-place detection unit, a processing and control unit, a voice unit, and a power supply module; The multimeter in-place detection unit, the voltage detector in-place detection unit, and the voice unit are respectively connected to the processing and control unit; the power supply module is respectively connected to the multimeter in-place detection unit, the voltage detector in-place detection unit, the processing and control unit, and the voice unit; the processing and control unit is also connected to an external power supply circuit; A multimeter in-position detection unit is used to detect the in-position information of the multimeter and output the detected in-position information to the processing and control unit; A voltage tester in-position detection unit is used to detect the in-position information of the voltage tester and output the detected in-position information to the processing and control unit; When the processing and control unit determines that the multimeter is not in position based on the detection information of the multimeter in-position detection unit, it triggers the voice unit to give an alarm and simultaneously controls the external power supply circuit to cut off the power; When the processing and control unit determines that the voltage tester is not in position based on the detection information of the voltage tester in-position detection unit, it triggers the voice unit to output voice information and simultaneously controls the external power supply circuit to cut off the power.

[0007] This device changes the previous passive mode that relies on manual inspection of the tool's return situation. With an automated monitoring and protection mechanism, it effectively makes up for the omissions caused by human factors. No matter how busy the operator is or how distracted their attention is, as long as the tool is not in place, the device can accurately identify it and take corresponding measures, reducing the possibility of electrical accidents caused by the tool not being in place, and providing a strong guarantee for the stable operation of the power system and the safety of personnel. The voice alarm function enables the operator to know the specific situation of the tool in the first time, without having to spend extra time and energy to check the tool status one by one, thus optimizing the electrical operation process. At the same time, the power-off protection avoids equipment damage and waste of repair time caused by possible electrical accidents, improves the work efficiency as a whole, and ensures the smooth progress of power operations.

[0008] As a further limitation of the technical solution of the present invention, the processing and control unit includes a first opto-coupler relay and a second opto-coupler relay; The normally closed contact of the second opto-coupler relay is connected to the external power supply control circuit; The multimeter in-position detection unit includes a limit switch. When the multimeter is in position, the normally closed contact of the limit switch is in an open state. When the multimeter is not in position, the normally closed contact of the limit switch resumes to a closed state. The power supply module is connected to the first opto-coupler relay through the limit switch, and the output end of the first opto-coupler relay is connected to the voice unit; The limit switch is also connected to the second opto-coupler relay. When the power supply module is connected to the first opto-coupler relay through the limit switch, the normally open contact of the first opto-coupler relay closes, triggering the voice unit to output voice information. At the same time, the second opto-coupler relay is connected to the power supply module. At this time, the normally open contact of the second opto-coupler relay closes and the normally closed contact opens, and the external power supply circuit is powered off.

[0009] As a further limitation of the technical solution of the present invention, the processing and control unit includes a third opto-coupler relay and a fourth opto-coupler relay, and the normally closed contact of the fourth opto-coupler relay is connected to the external power supply control circuit; The in-position detection unit of the voltage detector includes a position detection switch. When the voltage detector is in position, the normally closed contact of the position detection switch is in the open state. When the voltage detector is not in position, the normally closed contact of the position detection switch resumes the closed state. The power supply module is connected to the third opto-relay through the position detection switch, enabling the third opto-relay to trigger the voice unit to output voice information. At the same time, the reset signal of the position detection switch turns on the fourth opto-relay, the normally open contact of the fourth opto-relay closes, and the normally closed contact opens, cutting off the external power supply circuit.

[0010] The processing and control unit uses multiple opto-relays, such as the first opto-relay, the second opto-relay, the third opto-relay, the fourth opto-relay, etc. Opto-relays have the function of electrical isolation, which can effectively avoid interference between circuits and improve the stability and reliability of the device. Through the contact control of the opto-relays, precise control of the voice unit alarm and the power-off of the external power supply circuit is achieved.

[0011] As a further limitation of the technical solution of the present invention, the normally closed contact of the third opto-relay is connected in series in the circuit of the limit switch. When the voltage detector is not in position, the normally closed contact of the third opto-relay is open. At this time, when the multimeter is not in position, the power supply module cannot access the first opto-relay through the normally closed contact of the limit switch and the open normally closed contact of the third opto-relay. Only when the voltage detector is in position and it is detected that the multimeter is not in position, the power supply module accesses the first opto-relay through the limit switch and the normally closed contact of the third opto-relay, and the normally open contact of the first opto-relay closes, triggering the voice unit to output voice information.

[0012] The normally closed contact of the third opto-relay is connected in series in the circuit of the limit switch, making the detection of the voltage detector and the multimeter logically related. Only when the voltage detector is in position and it is detected that the multimeter is not in position, will the device trigger the alarm and power-off actions, further optimizing the protection logic and improving the intelligence level of the device.

[0013] As a further limitation of the technical solution of the present invention, the processing and control unit further includes a fifth opto-relay and a sixth opto-relay. The normally closed contact of the sixth opto-relay is connected to the external power supply control circuit. The fifth opto-relay is connected to the voice unit. The device further includes a timer connected to the power supply module. The power supply module is connected to the fifth opto-relay and the sixth opto-relay through the delay-closed contact of the timer. When the delay-closed contact of the timer closes, the fifth opto-relay is powered on, the normally open contact of the fifth opto-relay closes, triggering the voice unit to output voice information. At the same time, when the delay-closed contact of the timer closes, the sixth opto-relay is powered on by the power supply module, the normally open contact of the sixth opto-relay closes, and the normally closed contact opens, cutting off the external power supply circuit.

[0014] The device is equipped with a timer, and the fifth opto-coupled relay and the sixth opto-coupled relay are controlled by the delayed closing contact of the timer. When the delayed closing contact of the timer closes, it triggers the voice unit to output voice information and controls the external power supply circuit to cut off power, realizing the function of power-off protection according to the preset time and meeting the time control requirements of some special electrical operation processes.

[0015] As a further limitation of the technical solution of the present invention, the processing and control unit further includes a ninth opto-coupled relay connected to the voice unit, and an alarm is also connected to the ninth opto-coupled relay; the device further includes a detection module deployed at the position of the live body for detecting whether there is a person approaching, and the power supply module is connected to the ninth opto-coupled relay through the detection module. When the detection module detects that there is a person approaching, it connects the power supply module and the ninth opto-coupled relay, makes the normally open contact of the ninth opto-coupled relay close, triggers the voice unit to output voice information, and at the same time triggers the alarm to give an alarm.

[0016] As a further limitation of the technical solution of the present invention, the detection module includes a photoelectric switch and / or a light curtain sensor; When the photoelectric switch and the light curtain sensor exist at the same time, the number of ninth opto-coupled relays is two. One ninth opto-coupled relay is connected to the photoelectric switch, and the other ninth opto-coupled relay is connected to the light curtain sensor.

[0017] The detection module (including the photoelectric switch and / or the light curtain sensor) can detect in real time whether there is a person approaching the position of the live body. When it detects that there is a person approaching, it connects the power supply module and the ninth opto-coupled relay, triggers the voice unit to output voice information, and timely reminds the person to stay away from the live body to avoid the occurrence of electric shock accidents.

[0018] As a further limitation of the technical solution of the present invention, the processing and control unit further includes an eighth opto-coupled relay, and the eighth opto-coupled relay is connected to the voice unit; The device further includes a power switch, and the power supply module is connected to the eighth opto-coupled relay through the power switch. When the power switch closes, the eighth opto-coupled relay is connected to the power supply, triggering the voice unit to output voice information.

[0019] When the power switch closes, it triggers the voice unit to output voice information through the eighth opto-coupled relay, providing an intuitive prompt of the power supply state for the operator and facilitating the operator to understand the working state of the device.

[0020] As a further limitation of the technical solution of the present invention, the device further includes an electric control box, the processing and control unit is arranged inside the electric control box, the in-position detection unit of the multimeter and the in-position detection unit of the voltage detector are respectively arranged on both sides of the electric control box, the electric control box is provided with a box door, the power switch, the timer and the voice unit are arranged on the inner side of the box door, and an in-box input terminal and an in-box output terminal are further arranged inside the electric control box. The input end of the processing and control unit is connected to the in-box input terminal, and the output end of the processing and control unit is connected to the in-box output terminal; The electric control box is further provided with an out-box input terminal and an out-box output terminal; the detection module is connected to the out-box input terminal, and the out-box input terminal is connected to the in-box input terminal; The in-box output terminal is connected to the out-box output terminal, and the out-box output terminal is connected to an external power supply circuit.

[0021] The device uses an electric control box for overall layout. The processing and control unit is arranged inside the electric control box. The in-position detection unit of the multimeter and the in-position detection unit of the voltage detector are respectively arranged on both sides of the electric control box. The power switch, the timer and the voice unit are arranged on the inner side of the box door. At the same time, the electric control box is provided with an in-box input terminal, an in-box output terminal, an out-box input terminal and an out-box output terminal, which is convenient for connection with external devices. This structural design makes the layout of each component of the device clear, facilitating installation, maintenance and repair, and improving work efficiency.

[0022] As a further limitation of the technical solution of the present invention, a hanging storage box for preventing the multimeter is arranged on one side outside the electric control box, and a limit switch is installed at the lower part of the hanging storage box; a voltage detector bracket is arranged on the other side outside the electric control box, and a position detection switch is arranged at the position of the voltage detector blade on the voltage detector bracket.

[0023] A hanging storage box for placing the multimeter is arranged on one side outside the electric control box, and a limit switch is installed at the lower part; a voltage detector bracket is arranged on the other side, and a position detection switch is arranged at the position of the voltage detector blade. This design combines tool storage and detection functions, which not only facilitates the storage of tools but also ensures the accuracy of in-position detection.

[0024] The beneficial effects of the technical solution of the present invention are as follows: By setting the in-position detection unit of the multimeter and the in-position detection unit of the voltage detector, the real-time monitoring of the in-position states of the multimeter and the voltage detector is realized. Once it is detected that the tool is not in position, the processing and control unit can quickly react and immediately trigger the voice unit to give an alarm, intuitively and clearly reminding the operator of potential safety hazards. At the same time, the external power supply circuit is controlled to cut off the power, actively cutting off the power that may cause danger and nipping the safety risk in the bud, improving the safety and reliability of electrical operations. Description of the Drawings

[0025] To more clearly illustrate the technical solution of the present invention, the accompanying drawings required for description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0026] Figure 1 It is the connection block diagram of the device provided by the embodiment of the present invention.

[0027] Figure 2 It is the connection block diagram of the device provided by another embodiment of the present invention.

[0028] Figure 3 It is the circuit connection diagram of the normally closed contact and power supply control in the embodiment of the present invention.

[0029] Figure 4 It is the internal structure diagram of the electric control box provided by the embodiment of the present invention.

[0030] Figure 5 It is the external structure diagram of the electric control box provided by the embodiment of the present invention.

[0031] Figure 6 It is the structure diagram of the voice and alarm part in the electric control box provided by the embodiment of the present invention.

[0032] Figure 7 It is the schematic diagram of the positions of the multimeter detection unit and the live wire detection unit in the embodiment of the present invention.

[0033] Figure 8 It is the schematic diagram of the specific application and installation of the device in the embodiment of the present invention.

[0034] Figure 9 It is the circuit connection diagram of the device in the embodiment of the present invention.

[0035] Figure 10 It is the connection circuit of the photoelectric switch and the light curtain sensor in the embodiment of the present invention. Detailed implementation manners

[0036] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments of the present invention. Obviously, the embodiments described below are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0037] Such as Figure 1As shown in the figure, an embodiment of the present invention provides a power-off protection device based on voice prompts, including a multimeter in-position detection unit, a voltage tester in-position detection unit, a processing and control unit, a voice unit, and a power supply module; The multimeter in-position detection unit, the voltage tester in-position detection unit, and the voice unit are respectively connected to the processing and control unit; the power supply module is respectively connected to the multimeter in-position detection unit, the voltage tester in-position detection unit, the processing and control unit, and the voice unit; the processing and control unit is also connected to an external power supply circuit; The multimeter in-position detection unit is used to detect the in-position information of the multimeter and output the detected in-position information to the processing and control unit; the voltage tester in-position detection unit is used to detect the in-position information of the voltage tester and output the detected in-position information to the processing and control unit; When the processing and control unit determines that the multimeter is not in position according to the detection information of the multimeter in-position detection unit, it triggers the voice unit to give an alarm and at the same time controls the external power supply circuit to cut off the power; when the processing and control unit determines that the voltage tester is not in position according to the detection information of the voltage tester in-position detection unit, it triggers the voice unit to output voice information and at the same time controls the external power supply circuit to cut off the power.

[0038] In this power-off protection device based on voice prompts, in order to ensure the stable operation of each unit, it may be necessary to convert the output of the power supply module into two voltages of 5V and 12V. Generally speaking, the processing and control unit and some sensors may require 5V power supply, while the voice unit may require 12V power supply to obtain sufficient power to emit clear sounds.

[0039] A power conversion chip can be used to achieve voltage conversion. Common 5V conversion chips such as LM7805, which is a linear voltage regulator chip that can stably output a higher input voltage as 5V. For 12V conversion, the LM7812 chip can be used, which is also a linear voltage regulator chip that can convert the input voltage into a stable 12V output. It is also possible to use a 5V power supply to be converted into 12V through a voltage converter and then supply power to the voice unit.

[0040] Such as Figure 2 and Figure 3 and Figure 9 As shown in the figure, in some embodiments, the processing and control unit includes a first opto-relay and a second opto-relay; the normally closed contact K2 of the second opto-relay is connected to an external power supply control circuit; The in-position detection unit of the multimeter includes a limit switch. When the multimeter is in position, the normally-closed contact NC of the limit switch is in the open state. When the multimeter is not in position, the normally-closed contact NC of the limit switch resumes the closed state. The power supply module is connected to the first opto-relay through the limit switch, and the output terminal of the first opto-relay is connected to the voice unit; the limit switch is also connected to the second opto-relay. When the power supply module accesses the first opto-relay through the limit switch, the normally-open contact K1 of the first opto-relay closes, triggering the voice unit to output voice information. At the same time, the second opto-relay is connected to the power supply module. At this time, the normally-open contact of the second opto-relay closes, and the normally-closed contact K2 of the second opto-relay opens, controlling the external power supply circuit to cut off the power.

[0041] The processing and control unit includes a third opto-relay and a fourth opto-relay, and the normally-closed contact K4 of the fourth opto-relay is connected to the external power supply control circuit; The in-position detection unit of the voltage tester includes a position detection switch. When the voltage tester is in position, the normally-closed contact WH of the position detection switch closes, and the normally-open contact BK opens. When the voltage tester is not in position, the normally-closed contact WH of the position detection switch opens, and the normally-open contact BK closes. The power supply module is connected to the output terminals of the third opto-relay and the fourth opto-relay through the normally-closed contact WH of the position detection switch; the normally-open contact K3 of the third opto-relay is closed, triggering the voice unit to output voice information; at the same time, the power supply of the fourth opto-relay is turned on to make the normally-open contact of the fourth opto-relay close, and the normally-closed contact K4 of the fourth opto-relay opens, controlling the external power supply circuit to cut off the power.

[0042] The processing and control unit uses multiple opto-relays, such as the first opto-relay, the second opto-relay, the third opto-relay, the fourth opto-relay, etc. The opto-relay has an electrical isolation function, which can effectively avoid interference between circuits and improve the stability and reliability of the device. Through the contact control of the opto-relay, precise control of the voice unit alarm and the external power supply circuit power-off is achieved.

[0043] In some embodiments, the processing and control unit further includes a seventh opto-relay. The power supply module supplies power to the seventh opto-relay through the normally-open contact BK of the position detection switch, and the normally-closed contact K7 of the seventh opto-relay is connected in series in the circuit of the limit switch; When the voltage tester is not in place, the normally open contact BK of the position detection switch closes, the seventh opto-coupler relay is powered on, and the normally closed contact K7 of the seventh opto-coupler relay opens. At this time, when the multimeter is not in place, the power supply module cannot be connected to the first opto-coupler relay through the normally closed contact NC of the limit switch and the open normally closed contact K7 of the seventh opto-coupler relay. Only when the voltage tester is in place, the normally open contact BK of the position detection switch opens, the normally closed contact WH closes, the seventh opto-coupler relay is not powered on and does not operate, and the normally closed contact K7 of the seventh opto-coupler relay is in the closed state. If it is detected that the multimeter is not in place, the power supply module is connected to the first opto-coupler relay through the normally closed contact NC reset by the limit switch and the normally closed contact K7 of the seventh opto-coupler relay, and the normally open contact K1 of the first opto-coupler relay closes, triggering the voice unit to output voice information.

[0044] The normally closed contact K7 of the seventh opto-coupler relay is connected in series in the circuit of the limit switch, making the detection of the voltage tester and the multimeter logically related. Only when the voltage tester is in place and it is detected that the multimeter is not in place, will the device trigger the alarm and power-off actions, further optimizing the protection logic and improving the intelligence level of the device.

[0045] In some embodiments, the processing and control unit further includes a fifth opto-coupler relay and a sixth opto-coupler relay; the normally closed contact K6 of the sixth opto-coupler relay is connected to an external power supply control circuit; the fifth opto-coupler relay is connected to the voice unit; The device further includes a timer connected to the power supply module, and the power supply module is connected to the fifth opto-coupler relay and the sixth opto-coupler relay respectively through the delay-closed contact of the timer; When the delay-closed contact of the timer closes, the fifth opto-coupler relay is connected to the power supply, the normally open contact K5 of the fifth opto-coupler relay closes, triggering the voice unit to output voice information; at the same time, when the delay-closed contact of the timer closes, the sixth opto-coupler relay is connected to the power supply module, the normally open contact of the sixth opto-coupler relay closes, and the normally closed contact K6 of the sixth opto-coupler relay opens, controlling the external power supply circuit to cut off the power.

[0046] As Figure 3 shown, the power supply of the main power supply line is three-phase L1, L2, L3. Generally, a contactor is connected in the main power supply line, and the main contacts of the contactor are connected to the main power supply line. The auxiliary contacts of the contactor are connected to two phases of the main power supply line in parallel with the button and then connected to the coil of the contactor. The main power supply line K3 passes through the fuse FU2 and is successively connected in series with the normally closed button SB2, the normally open button SB1, the contactor coil KM, the normally closed contact K2 of the second opto-coupler relay, the normally closed contact K4 of the fourth opto-coupler relay, and the normally closed contact K6 of the sixth opto-coupler relay to the L2 of the main power supply line; the auxiliary contact of the contactor is connected in parallel with the button SB1.

[0047] After closing the air switch QF and pressing the start button SB1, K2, K4, and K6 are the normally closed contacts of the output of the optocoupler relay. When there is no operation error, their normally closed contacts are conducting, the KM coil is energized, its normally open contacts close to form a self-locking circuit, the main contact K closes, and the main circuit is connected to the power supply to work.

[0048] The device is equipped with a timer, and the fifth optocoupler relay and the sixth optocoupler relay are controlled by the delay closing contact of the timer. When the delay closing contact of the timer closes, it triggers the voice unit to output voice information and controls the external power supply circuit to cut off the power, realizing the function of power-off protection according to the preset time and meeting the time control requirements of some special electrical operation processes.

[0049] In some embodiments, the processing and control unit further includes a ninth optocoupler relay connected to the voice unit. The device further includes a detection module deployed at the live body position for detecting whether there are personnel approaching. The power supply module is connected to the ninth optocoupler relay through the detection module. When the detection module detects that there are personnel approaching, it connects the power supply module to the ninth optocoupler relay, causing the normally open contact K7 of the ninth optocoupler relay to close, triggering the voice unit to output voice information, and at the same time triggering the alarm to give an alarm.

[0050] In some embodiments, the detection module includes an optoelectronic switch and a light curtain sensor; as Figure 10 shown, five optoelectronic switches are provided and one light curtain sensor is provided; Correspondingly, the number of ninth optocoupler relays is six. Each optoelectronic switch is connected to a seventh optocoupler relay, and one ninth optocoupler relay is connected to the light curtain sensor.

[0051] The detection module (including the optoelectronic switch and / or the light curtain sensor) can detect in real time whether there are personnel approaching the live body position. When it detects that there are personnel approaching, the normally open contact of the optoelectronic switch closes, connecting the power supply module to the ninth optocoupler relay, triggering the voice unit to output voice information, and at the same time triggering the alarm to give an alarm, timely reminding the personnel to stay away from the live body and avoiding the occurrence of electric shock accidents.

[0052] In some embodiments, the processing and control unit further includes an eighth optocoupler relay, and the eighth optocoupler relay is connected to the voice unit; The device further includes a power switch, the normally open contact SW of the power switch. The power supply module is connected to the eighth optocoupler relay through the power switch. When the normally open contact SW of the power switch closes, the eighth optocoupler relay is connected to the power supply, and the normally open contact K8 of the eighth optocoupler relay closes to trigger the voice unit to output voice information.

[0053] When the power switch is closed, the voice unit is triggered by the eighth opto-relay to output voice information, providing an intuitive prompt for the operator about the power status and facilitating the operator to understand the working status of the device.

[0054] In some embodiments, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 as shown, the device further includes an electric control box 2. The processing and control unit is arranged inside the electric control box 2. The in-position detection unit for the multimeter and the in-position detection unit for the voltage detector are respectively arranged on both sides of the electric control box 2. The electric control box is provided with a box door 13. The power switch 17, the timer 16 and the voice unit are arranged on the inner side of the box door 13. Inside the electric control box, there are also arranged an in-box input terminal 9, an in-box output terminal 11, an out-box input terminal 24 and an out-box output terminal 25. The input ends of the first opto-relay to the eighth opto-relay are connected to the in-box input terminal 9, and the output end of the processing and control unit is connected to the in-box output terminal 11; The electric control box 2 is also provided with; the detection module is connected to the out-box input terminal 24, and the out-box input terminal 24 is connected to the in-box input terminal 9; The normally closed contacts K2, K4, and K6 of the second opto-relay, the fourth opto-relay and the sixth opto-relay are connected in series and then connected to the out-box output terminal 25. The in-box output terminal 11 is connected to the out-box output terminal 25, and the out-box output terminal 25 is connected to an external power supply control circuit.

[0055] The device uses an electric control box for overall layout. The processing and control unit is arranged inside the electric control box. The in-position detection unit for the multimeter and the in-position detection unit for the voltage detector are respectively arranged on both sides of the electric control box. The power switch, the timer and the voice unit are arranged on the inner side of the box door. At the same time, the electric control box is provided with an in-box input terminal, an in-box output terminal, an out-box input terminal and an out-box output terminal, which is convenient for connection with external devices. This structural design makes the layout of each component of the device clear, facilitating installation, maintenance and repair, and improving work efficiency.

[0056] On one side of the outside of the electric control box 2, there is a hanging storage box 19 for preventing the multimeter, and a limit switch 20 is installed at the lower part of the hanging storage box 19; On the other side of the outside of the electric control box, there is a voltage detector bracket 22, and a position detection switch 23 is arranged at the position of the voltage detector blade on the voltage detector bracket 22.

[0057] On one side of the outside of the electric control box, a hanging storage box for placing the multimeter 18 is provided, and a limit switch 20 is installed at the lower part; On the other side, a voltage detector bracket is provided, and a position detection switch 23 is arranged at the position of the voltage detector 21 blade. This design combines tool storage and detection functions, which not only facilitates the storage of tools but also ensures the accuracy of in-position detection. The voice unit includes a voice broadcaster 14.

[0058] Press the power switch 10 on the control cabinet door to connect the power supply circuit inside the cabinet (powered by 18650 lithium batteries). Through a voltage converter, the voltage is raised to 5V to supply power to components such as optocoupler relays, timers, voice and alarms inside the cabinet. The externally connected photoelectric switch and light curtain sensor outside the cabinet require 12V power supply.

[0059] As Figure 9 shown, when the power is turned on, the input of the eighth optocoupler relay will be connected. The normally open contact K8 of the eighth optocoupler relay closes, connecting the voice broadcaster 14, and a voice prompt is issued: "The circuit has been powered on. Please pay attention to safety!"

[0060] After the circuit is powered on, first judge the fault phenomenon of the maintenance equipment. Generally, a multimeter is needed to detect the faulty circuit. If the normal process requires powering off and verifying the power of the maintenance circuit at the beginning of the measurement, it belongs to misoperation. If one is careless and forgets to power off and directly picks up the multimeter 18 for measurement, the normally closed contact of the limit switch 20 placed below in the multimeter storage box 19 will be reset and closed (after the multimeter is placed in the specified position, the limit switch 20 will act and its normally closed contact will be disconnected), which will connect the inputs of the first optocoupler relay and the second optocoupler relay. The normally open contact K1 of the first optocoupler relay closes to connect the voice reminder, and a voice prompt is issued: "Danger, the circuit may be energized. Please power off and verify the power, and confirm safety before measuring!" Only when the multimeter 18 is placed back in the specified position will the voice reminder end. At the same time as the voice reminder is issued, the input of the second optocoupler relay is powered on, and its output normally closed contact K2 is connected in series to the control circuit coil. The normally closed contact K2 is disconnected, and the contactor coil KM loses power. The normally open contact of the contactor closed in the main power supply circuit returns to the normally open state due to the coil power-off, automatically cutting off the circuit to prevent measuring with electricity and burning out the multimeter.

[0061] In the circuit, the normally open contact BK of the in-position detection switch is connected in series with the normally closed contact K7 of the seventh optocoupler relay in the circuit of the limit switch where the multimeter is located. When the test pen 21 is taken away, the normally open contact of the in-position detection switch closes and the normally closed contact disconnects. The seventh optocoupler relay is connected to the power supply, and the normally closed contact K3 of the seventh optocoupler relay disconnects. When measuring with the multimeter 18 again, the sensor circuit where it is located will not act and no voice broadcast will be issued. Only when the test pen 21 is in the specified position, the normally open contact of the in-position detection switch disconnects and the normally closed contact closes. The seventh optocoupler relay is not connected to the power supply. At this time, the normally closed contact K7 of the seventh optocoupler relay closes. At this time, when the multimeter 18 is taken away, the normally closed contact of the limit switch is reset, and the power supply is connected to the first optocoupler relay through the normally closed contact K7 of the seventh optocoupler relay, and the first optocoupler relay can trigger the voice broadcaster to issue a voice reminder.

[0062] When performing power-off voltage detection with the voltage detector 21 according to the normal operation procedure, the position detection switch 23 is actuated and reset, its normally closed contact closes, connecting the inputs of the third opto-relay and the fourth opto-relay. The normally open contact of the third opto-relay connects three-way voice reminders to issue voice prompts. At the same time, the reset signal of the position detection switch 23 connects the input of the fourth opto-relay, and its output normally closed contact K4 is connected in series to the control circuit coil. K4's normally closed contact opens, the contactor coil loses power, and the circuit is automatically cut off to prevent measurement while the circuit is energized and burning out the multimeter. After the voltage detection is completed, the voltage detector is placed back in its original position.

[0063] In addition, the circuit is equipped with a timer 16, whose time can be adjusted according to the difficulty of the fault. When the timing time is up, its delayed closing contact connects the inputs of the fifth and sixth opto-relays. The normally open contact K5 of the fifth opto-relay connects the voice announcer to issue a voice prompt: "This fault detection has ended!" The normally closed contact K6 of the sixth opto-relay is connected in series to the control circuit coil. K6's normally closed contact opens, the contactor coil loses power, and the circuit is automatically cut off, and the test ends.

[0064] In the actual design, the output normally closed contacts K2, K4, and K6 of the opto-relays are connected in series to form an output contact and connected to the output terminal outside the electric control box, and then connected to the coil starting circuit of the controlled circuit through the terminal block. Any process error or when the timing time is up, its external output normally closed contact will open, cutting off the power supply of the circuit to be repaired and ensuring the personal safety of the operator.

[0065] The timer in the embodiment of the present invention adopts a dual-channel digital display delay relay.

[0066] In the embodiment of the present invention, as Figure 8 shown, the device further includes a solar panel 1, the solar panel is installed on the triangular bracket 6, the light curtain sensor includes a light curtain sensor transmitter 4 and a light curtain sensor receiver 5, the light curtain sensor transmitter 4 and the light curtain sensor receiver 5 are respectively installed on the triangular bracket 6, the solar panel charges the power module through the power line 7, and the light curtain sensor transmitter 4 and the light curtain sensor receiver 5 are respectively connected to the input terminal outside the box in the electric control box through the signal line 8.

[0067] When repairing equipment, in order not to affect the power consumption of other normal equipment, generally the local power-off method is adopted for the operation object. In this way, there may still be other live electrical appliances or equipment around the operation, posing a safety hazard to the operator. To prevent electric shock, the operator must maintain a certain minimum safe distance from the live body. For example, in low-voltage electrical operations, the minimum distance is generally about 35 cm, and the minimum cannot be less than 10 cm. To achieve precise control, first, an optoelectronic switch is used and fixed by magnetic attraction around the live body. When accidentally entering the detection area, the optoelectronic switch will be triggered and conduct, turning on the alarm to emit a warning sound to remind the operator to quickly stay away from this position. Multiple optoelectronic switches can be installed at multiple adjacent live points to achieve comprehensive auxiliary detection. If the line transmission distance is long and it is inconvenient to lay wires, a wireless transmission module can be added to achieve wireless control. Secondly, if the live equipment is large in volume, such as a switch cabinet, etc., a light curtain sensor can be installed and the optoelectronic pair-shooting method can be used to achieve line and surface control. When entering the detection range by mistake, the alarm device will also emit a warning sound to remind the operator to quickly stay away from here.

[0068] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power-off protection device based on voice prompts, characterized in that, It includes a multimeter in-position detection unit, an electroscope in-position detection unit, a processing and control unit, a voice unit, and a power supply module; The multimeter in-position detection unit, the electroscope in-position detection unit, and the voice unit are respectively connected to the processing and control unit; the power supply module is respectively connected to the multimeter in-position detection unit, the electroscope in-position detection unit, the processing and control unit, and the voice unit; the processing and control unit is also connected to an external power supply circuit; The multimeter in-position detection unit is used to detect the in-position information of the multimeter and output the detected in-position information to the processing and control unit; The electroscope in-position detection unit is used to detect the in-position information of the electroscope and output the detected in-position information to the processing and control unit; When the processing and control unit determines that the multimeter is not in position according to the detection information of the multimeter in-position detection unit, it triggers the voice unit to give a voice prompt and simultaneously controls the external power supply circuit to cut off the power; when the processing and control unit determines that the electroscope is not in position according to the detection information of the electroscope in-position detection unit, it triggers the voice unit to output voice information and simultaneously controls the external power supply circuit to cut off the power.

2. The power-off protection device based on voice prompt according to claim 1, wherein The processing and control unit includes a first opto-coupled relay and a second opto-coupled relay; the normally closed contact of the second opto-coupled relay is connected to an external power supply control circuit; The multimeter in-position detection unit includes a limit switch. When the multimeter is in position, the normally closed contact of the limit switch is in an open state. When the multimeter is not in position, the normally closed contact of the limit switch resumes to a closed state. The power supply module is connected to the first opto-coupled relay through the limit switch, and the output end of the first opto-coupled relay is connected to the voice unit; the limit switch is also connected to the second opto-coupled relay. When the power supply module is connected to the first opto-coupled relay through the limit switch, the normally open contact of the first opto-coupled relay closes, triggering the voice unit to output voice information. At the same time, the second opto-coupled relay is connected to the power supply module. At this time, the normally open contact of the second opto-coupled relay closes and the normally closed contact disconnects, controlling the external power supply circuit to cut off the power.

3. The power-off protection device based on voice prompt according to claim 2, characterized in that, The processing and control unit includes a third opto-coupled relay and a fourth opto-coupled relay, and the normally closed contact of the fourth opto-coupled relay is connected to an external power supply control circuit; The electroscope in-position detection unit includes a position detection switch. When the electroscope is in position, the normally closed contact of the position detection switch is in a closed state and the normally open contact is open. When the electroscope is not in position, the normally closed contact of the position detection switch disconnects and the normally open contact closes. The power supply module is connected to the third opto-coupled relay and the fourth opto-coupled relay through the position detection switch; it causes the third opto-coupled relay to trigger the voice unit to output voice information; at the same time, the power of the fourth opto-coupled relay is turned on so that the normally open contact of the fourth opto-coupled relay closes and the normally closed contact disconnects, controlling the external power supply circuit to cut off the power.

4. The power-off protection device based on voice prompt according to claim 3, wherein, The processing and control unit further includes a seventh opto-coupled relay. The power supply module supplies power to the seventh opto-coupled relay through the normally open contact of the position detection switch, and the normally closed contact of the seventh opto-coupled relay is connected in series in the circuit of the limit switch; When the voltage detector is not in place, the normally open contact of the position detection switch closes, the seventh opto-coupler relay is powered on, and the normally closed contact of the seventh opto-coupler relay opens. At this time, when the multimeter is not in place, the power supply module cannot be connected to the first opto-coupler relay through the normally closed contact of the limit switch and the open normally closed contact of the seventh opto-coupler relay. Only when the voltage detector is in place, the normally open contact of the position detection switch opens, the normally closed contact closes, the seventh opto-coupler relay is not powered on and does not operate, and the normally closed contact of the seventh opto-coupler relay is in the closed state. If it is detected that the multimeter is not in place, the power supply module is connected to the first opto-coupler relay through the limit switch and the normally closed contact of the seventh opto-coupler relay, and the normally open contact of the first opto-coupler relay closes, triggering the voice unit to output voice information.

5. The power-off protection device based on voice prompt according to claim 4, wherein The processing and control unit further includes a fifth opto-coupler relay and a sixth opto-coupler relay; the normally closed contact of the sixth opto-coupler relay is connected to an external power supply control circuit; the fifth opto-coupler relay is connected to the voice unit; The device further includes a timer connected to the power supply module, and the power supply module is respectively connected to the fifth opto-coupler relay and the sixth opto-coupler relay through the delay closing contact of the timer; When the delay closing contact of the timer closes, the fifth opto-coupler relay is connected to the power supply, the normally open contact of the fifth opto-coupler relay closes, triggering the voice unit to output voice information; at the same time, when the delay closing contact of the timer closes, the sixth opto-coupler relay is connected to the power supply module, the normally open contact of the sixth opto-coupler relay closes, and the normally closed contact opens, controlling the external power supply circuit to cut off the power.

6. The power-off protection device based on voice prompt according to claim 5, characterized in that, The processing and control unit further includes a ninth opto-coupler relay connected to the voice unit, and an alarm is also connected to the ninth opto-coupler relay; the device further includes a detection module deployed at the live body position for detecting whether there is a person approaching. The power supply module is connected to the ninth opto-coupler relay through the detection module. When the detection module detects that there is a person approaching, the connection between the power supply module and the ninth opto-coupler relay is turned on, the normally open contact of the ninth opto-coupler relay closes, triggering the voice unit to output voice information, and at the same time triggering the alarm to give an alarm.

7. The power-off protection device based on voice prompt according to claim 6, wherein The detection module includes a photoelectric switch and / or a light curtain sensor; When the photoelectric switch and the light curtain sensor exist at the same time, the number of ninth opto-coupler relays is multiple, one photoelectric switch is connected to one ninth opto-coupler relay, and one light curtain sensor is connected to one ninth opto-coupler relay.

8. The power-off protection device based on voice prompt according to claim 7, characterized in that, The processing and control unit further includes an eighth opto-coupler relay, and the eighth opto-coupler relay is connected to the voice unit; The device further includes a power switch. The power supply module is connected to the eighth opto-coupler relay through the power switch. When the power switch closes, the eighth opto-coupler relay is connected to the power supply, triggering the voice unit to output voice information.

9. The power-off protection device based on voice prompt according to claim 8, wherein The device further includes an electric control box. The processing and control unit is arranged inside the electric control box. The multimeter in-place detection unit and the voltage detector in-place detection unit are respectively arranged on both sides of the electric control box. The electric control box is provided with a box door. The power switch, the timer and the voice unit are arranged on the inner side of the box door. Inside the electric control box, there are also provided an in-box input terminal, an in-box output terminal, an out-box input terminal and an out-box output terminal; The input ends of the first opto-coupler relay to the eighth opto-coupler relay are connected to the input terminals inside the box, and the output end of the processing control unit is connected to the output terminals inside the box. The normally closed contacts of the second opto-coupler relay, the fourth opto-coupler relay, and the sixth opto-coupler relay are connected in series and then connected to the output terminals outside the box. The detection module is connected to the input terminals outside the box, and the input terminals outside the box are connected to the input end of the ninth opto-coupler relay; the output terminals inside the box are connected to the output terminals outside the box, and the output terminals outside the box are connected to the external power supply control circuit.

10. The power-off protection device based on voice prompt according to claim 9, characterized in that, On one side outside the electric control box, there is a hanging storage box for preventing a multimeter, and a limit switch is installed at the lower part of the hanging storage box; on the other side outside the electric control box, there is a test pen holder, and a position detection switch is arranged at the position of the test pen blade on the test pen holder.

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