CN205343028U - Electric tool safety protection system - Google Patents
Electric tool safety protection system Download PDFInfo
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- CN205343028U CN205343028U CN201620127095.8U CN201620127095U CN205343028U CN 205343028 U CN205343028 U CN 205343028U CN 201620127095 U CN201620127095 U CN 201620127095U CN 205343028 U CN205343028 U CN 205343028U
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Abstract
The utility model relates to an electric tool safety protection system, electric tool and intelligent communication terminal including wireless connection, electric tool includes the shell, sets up the rotary joint on one side of the shell, the first in command who sets up at the shell opposite side, and this electric tool safety protection system passes through electric tool and intelligent communication terminal wireless connection, has realized the real time monitoring function of staff to each electric tool, in temperature measurement circuit, temperature sensor has adopted the constant voltage, the undercurrent power supply, its operating current is 200 mu A, the temperature of is reduced the self -heating volume of sensor, thereby the external interference has been reduced, temperature measurement circuit's measurement accuracy nature has been improved, moreover, this circuit adopts the bikini calibration method, sensitivity after the calibration is 40Hz DEG C, and integrated circuit's model is LM331, belong to accurate voltage frequency converter, its non -linearity in 1Hz~40kHz frequency range can reach 0.03%, thereby temperature measuring circuit measuring accuracy nature has been improved.
Description
Technical field
This utility model relates to a kind of electric tool safety protection system.
Background technology
Along with development and the social progress of science and technology, people are also more and more wider for the application of electric tool.On present electric tool market, it is most commonly seen electric tool that electric drill belongs to, and electric drill is in life-time service process, the common reason the most causing its fault is that temperature is too high, due to when electric drill works, the operating temperature of electric drill cannot be carried out monitor in real time by user, so tends to cause electric drill temperature too high, and burns out coil or drill bit.
Part electric drill adds temperature detection part, but in temperature detection process, owing to the temperature detection part accuracy of detection of equipment not and lacks temperature capacity of resisting disturbance, it is impossible to meet the user demand for safety protection to electric drill.
Utility model content
The technical problems to be solved in the utility model is: in order to overcome prior art to lack the deficiency that monitor in real time ability, temperature measurement accuracy difference and capacity of resisting disturbance are general, it is provided that one has monitor in real time ability and the temperature survey accurately system of electric tool safety protection reliably.
This utility model solves its technical problem and be the technical scheme is that a kind of electric tool safety protection system; electric tool and intelligent communication terminal including wireless connections; described electric tool includes shell, be arranged on the swivel joint of shell side, be arranged on the first in command of shell opposite side, be arranged on controlling button and status indicator lamp, be arranged on the second in command of outer casing bottom on shell, and described swivel joint is provided with some temperature sensing assemblies；
The described second in command is provided with central control unit, described central control unit includes wireless communication module, temperature detecting module, voltage detection module and current detection module, described temperature sensing assembly electrically connects with temperature detecting module, described temperature detecting module includes temperature sensing circuit, described temperature sensing circuit includes the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first adjustable resistance, second adjustable resistance, Zener diode, operational amplifier, integrated circuit and temperature sensor, the model of described integrated circuit is LM331, the inverting input of described operational amplifier is by the external 5V DC voltage power supply of series circuit of the second resistance and the first resistance composition, the inverting input of described operational amplifier passes through temperature sensor ground connection, the series circuit of described Zener diode and the second resistance and temperature sensor composition is in parallel, the plus earth of described Zener diode, the in-phase input end of described operational amplifier and the adjustable end of the first adjustable resistance connect, the series circuit of the series circuit of described 3rd resistance and the first adjustable resistance composition and the second resistance and temperature sensor composition is in parallel, the in-phase input end of described operational amplifier is connected with the outfan of operational amplifier by the series circuit of the 4th resistance and the first electric capacity composition, the inverting input of described operational amplifier is connected with the outfan of operational amplifier by the 5th resistance, the outfan of described operational amplifier is by the series circuit ground connection of the 6th resistance and the second electric capacity composition, the outfan of described operational amplifier is connected with the comparison input of integrated circuit by the 6th resistance, the external 5V DC voltage power supply of power end of described integrated circuit, the timing circuit end of described integrated circuit passes through the 7th external 5V DC voltage power supply of resistance, the timing circuit end of described integrated circuit passes through the 3rd capacity earth, the current output terminal of described integrated circuit and threshold values end connect, the current output terminal of described integrated circuit is respectively through the 4th electric capacity and the 8th resistance eutral grounding, the frequency output terminal of described integrated circuit passes through the 9th external 5V DC voltage power supply of resistance, the earth terminal ground connection of described integrated circuit, the reference current end of described integrated circuit passes through the second adjustable resistance ground connection.
As preferably, present smart mobile phone is as most common communication tool, and described intelligent communication terminal is smart mobile phone.
As preferably, described control button is touch key, and described status indicator lamp includes dichromatic LED.
As preferably; in order to improve the scope of system protection, add current protection and voltage protection function, the described second in command is provided with voltage sensor and current sensor; described voltage sensor electrically connects with voltage detection module, and described current sensor electrically connects with current detection module.
As preferably, in order to improve the accuracy detection to temperature, described temperature sensing assembly being provided with temperature sensor BT.
As preferably, the model of described operational amplifier is TL061.
As preferably, in order to improve the capacity of resisting disturbance of temperature sensing circuit, utilizing the feature that Mirror Grinding temperature drift coefficient is low, described 7th resistance and the 8th resistance are Mirror Grinding.
As preferably, described swivel joint is connected to drill bit.
The beneficial effects of the utility model are, compared with prior art, this electric tool safety protection system is by electric tool and intelligent communication terminal wireless connections, it is achieved that staff's real-time monitoring and control to each electric tool；In temperature sensing circuit, temperature sensor have employed constant voltage, small area analysis is powered, its operating current is 200 μ A, reduce the self-heating amount of temperature sensor, thus decreasing external disturbance, improve the measurement precision of temperature sensing circuit, moreover, this circuit adopts bikini calibration method, sensitivity after calibration is 40Hz/ DEG C, and the model of integrated circuit is LM331, belongs to accurate voltage/frequency converter, its nonlinearity in 1Hz～40kHz frequency range is up to ± 0.03%, thus improve the accuracy that temperature measuring circuit is measured.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further illustrated.
Fig. 1 is the structural representation of this utility model electric tool safety protection system；
Fig. 2 is the circuit theory diagrams of the temperature sensing circuit of this utility model electric tool safety protection system；
In figure: 1. drill bit, 2. swivel joint, 3. shell, 4. intelligent communication terminal, 5. status indicator lamp, 6. the first in command, 7. the second in command, 8. temperature sensing assembly, 9. control button, R1. the first resistance, R2. the second resistance, R3. the 3rd resistance, R4. the 4th resistance, R5. the 5th resistance, R6. the 6th resistance, R7. the 7th resistance, R8. the 8th resistance, R9. the 9th resistance, C1. the first electric capacity, C2. the second electric capacity, C3. the 3rd electric capacity, C4. the 4th electric capacity, RP1. the first adjustable resistance, RP2. the second adjustable resistance, D1. Zener diode, U1. operational amplifier, U2. integrated circuit, BT. temperature sensor.
Detailed description of the invention
Presently in connection with accompanying drawing, this utility model is described in further detail.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the composition relevant with this utility model.
As depicted in figs. 1 and 2; a kind of electric tool safety protection system; electric tool and intelligent communication terminal 4 including wireless connections; described electric tool includes shell 3, be arranged on the swivel joint 2 of shell 3 side, be arranged on the first in command 6 of shell opposite side, be arranged on controlling button 9 and status indicator lamp 5, be arranged on the second in command 7 bottom shell 3 on shell 3, and described swivel joint 2 is provided with some temperature sensing assemblies 8；
The described second in command 7 is provided with central control unit, described central control unit includes wireless communication module, temperature detecting module, voltage detection module and current detection module, described temperature sensing assembly 8 electrically connects with temperature detecting module, described temperature detecting module includes temperature sensing circuit, described temperature sensing circuit includes the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, first adjustable resistance RP1, second adjustable resistance RP2, Zener diode D1, operational amplifier U1, integrated circuit U2 and temperature sensor BT, the model of described integrated circuit U2 is LM331, the inverting input of described operational amplifier U1 is by the external 5V DC voltage power supply of series circuit of the second resistance R2 and the first resistance R1 composition, the inverting input of described operational amplifier U1 passes through temperature sensor BT ground connection, the series circuit of described Zener diode D1 and the second resistance R2 and temperature sensor BT composition is in parallel, the plus earth of described Zener diode D1, the in-phase input end of described operational amplifier U1 and the adjustable end of the first adjustable resistance RP1 connect, the series circuit of described 3rd resistance R3 and the first adjustable resistance RP1 composition and the series circuit of the second resistance R2 and temperature sensor BT composition are in parallel, the in-phase input end of described operational amplifier U1 is connected with the outfan of operational amplifier U1 by the series circuit of the 4th resistance R4 and the first electric capacity C1 composition, the inverting input of described operational amplifier U1 is connected by the outfan of the 5th resistance R5 and operational amplifier U1, the outfan of described operational amplifier U1 is by the series circuit ground connection of the 6th resistance R6 and the second electric capacity C2 composition, the outfan of described operational amplifier U1 is connected by the comparison input of the 6th resistance R6 and integrated circuit U2, the external 5V DC voltage power supply of power end of described integrated circuit U2, the timing circuit end of described integrated circuit U2 passes through the 7th external 5V DC voltage power supply of resistance R7, the timing circuit end of described integrated circuit U2 passes through the 3rd electric capacity C3 ground connection, the current output terminal of described integrated circuit U2 and threshold values end connect, the current output terminal of described integrated circuit U2 is respectively through the 4th electric capacity C4 and the eight resistance R8 ground connection, the frequency output terminal of described integrated circuit U2 passes through the 9th external 5V DC voltage power supply of resistance R9, the earth terminal ground connection of described integrated circuit U2, the reference current end of described integrated circuit U2 passes through the second adjustable resistance RP2 ground connection.
As preferably, present smart mobile phone is as most common communication tool, and described intelligent communication terminal 4 is smart mobile phone.
As preferably, described control button 9 is touch key, and described status indicator lamp 5 includes dichromatic LED.
As preferably; in order to improve the scope of system protection, add current protection and voltage protection function, the described second in command 7 is provided with voltage sensor and current sensor; described voltage sensor electrically connects with voltage detection module, and described current sensor electrically connects with current detection module.
As preferably, in order to improve the accuracy detection to temperature, described temperature sensing assembly 8 being provided with temperature sensor BT.
As preferably, the model of described operational amplifier U1 is TL061.
As preferably, in order to improve the capacity of resisting disturbance of temperature sensing circuit, utilizing the feature that Mirror Grinding temperature drift coefficient is low, described 7th resistance R7 and the eight resistance R8 is Mirror Grinding.
As preferably, described swivel joint 2 is connected to drill bit 1.
In this electric tool safety protection system, electric tool is by wireless communication module and intelligent communication terminal 4 wireless connections, it is achieved that staff's real-time monitoring and control to each electric tool.Wherein control button 9 for electric tool is controlled；Status indicator lamp 5 is for showing in real time the duty of electric tool；Temperature sensing assembly 8 is for carrying out monitor in real time to the temperature of electric tool swivel joint 2 part, thus serving temperature protection function.
Temperature sensing circuit in this electric tool safety protection system, temperature sensor BT is semiconductor temperature sensor, and available silicon diode (or emitter junction of NPN transistor) replaces.Wherein temperature sensor BT have employed constant voltage, small area analysis is powered, and its operating current is 200 μ A, reduces the self-heating amount of temperature sensor BT, thus decreasing external disturbance, improves the measurement precision of temperature sensing circuit.Zener diode D1 is stabilivolt, and the first resistance R1 and the second resistance R2 is current-limiting resistance.Utilize temperature sensor BT that ambient temperature converts to the analog voltage signal of millivolt level, deliver to operational amplifier U1 and zoom into the voltage signal of 0～3V, voltage/frequency (U/f) conversion is carried out, it is thus achieved that the frequency signal of 0～14kHz then through integrated circuit U2.First adjustable resistance RP1 is gain-adjusted potentiometer, and the second adjustable resistance RP2 is frequency calibration potentiometer.It adopts bikini calibration method, only needs the output frequency value at-40 DEG C, 0 DEG C and+40 DEG C is calibrated to 0Hz, 4kHz and 14kHz successively.Sensitivity after calibration is 40Hz/ DEG C.The model of integrated circuit U2 is LM331, belongs to accurate voltage/frequency converter, and its nonlinearity in 1Hz～40kHz frequency range is up to ± 0.03%, thus improve the accuracy that temperature measuring circuit is measured.7th resistance R7 and the three electric capacity C3 respectively timing resistor, timing capacitor.
Compared with prior art, this electric tool safety protection system is by electric tool and intelligent communication terminal 4 wireless connections, it is achieved that staff's real-time monitoring and control to each electric tool；In temperature sensing circuit, temperature sensor BT have employed constant voltage, small area analysis is powered, its operating current is 200 μ A, reduce the self-heating amount of temperature sensor BT, thus decreasing external disturbance, improve the measurement precision of temperature sensing circuit, moreover, this circuit adopts bikini calibration method, sensitivity after calibration is 40Hz/ DEG C, and the model of integrated circuit U2 is LM331, belong to accurate voltage/frequency converter, its nonlinearity in 1Hz～40kHz frequency range is up to ± 0.03%, thus improve the accuracy that temperature measuring circuit is measured.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not necessarily departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (8)
1. an electric tool safety protection system; it is characterized in that; electric tool and intelligent communication terminal (4) including wireless connections; described electric tool includes shell (3), is arranged on the swivel joint (2) of shell (3) side, the first in command (6) being arranged on shell opposite side, the control button (9) being arranged on shell (3) and status indicator lamp (5), be arranged on the second in command (7) of shell (3) bottom, and described swivel joint (2) is provided with some temperature sensing assemblies (8)；
The described second in command is provided with central control unit in (7), described central control unit includes wireless communication module, temperature detecting module, voltage detection module and current detection module, described temperature sensing assembly (8) electrically connects with temperature detecting module, described temperature detecting module includes temperature sensing circuit, described temperature sensing circuit includes the first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), 5th resistance (R5), 6th resistance (R6), 7th resistance (R7), 8th resistance (R8), 9th resistance (R9), first electric capacity (C1), second electric capacity (C2), 3rd electric capacity (C3), 4th electric capacity (C4), first adjustable resistance (RP1), second adjustable resistance (RP2), Zener diode (D1), operational amplifier (U1), integrated circuit (U2) and temperature sensor (BT), the model of described integrated circuit (U2) is LM331, the external 5V DC voltage power supply of series circuit that the inverting input of described operational amplifier (U1) consists of the second resistance (R2) and the first resistance (R1), the inverting input of described operational amplifier (U1) passes through temperature sensor (BT) ground connection, the series circuit that described Zener diode (D1) forms with the second resistance (R2) and temperature sensor (BT) is in parallel, the plus earth of described Zener diode (D1), the in-phase input end of described operational amplifier (U1) and the adjustable end of the first adjustable resistance (RP1) connect, the series circuit that the series circuit that described 3rd resistance (R3) and the first adjustable resistance (RP1) form and the second resistance (R2) and temperature sensor (BT) form is in parallel, the series circuit that the in-phase input end of described operational amplifier (U1) consists of the 4th resistance (R4) and the first electric capacity (C1) is connected with the outfan of operational amplifier (U1), the inverting input of described operational amplifier (U1) is connected with the outfan of operational amplifier (U1) by the 5th resistance (R5), the series circuit ground connection that the outfan of described operational amplifier (U1) consists of the 6th resistance (R6) and the second electric capacity (C2), the outfan of described operational amplifier (U1) is connected with the comparison input of integrated circuit (U2) by the 6th resistance (R6), the external 5V DC voltage power supply of power end of described integrated circuit (U2), the timing circuit end of described integrated circuit (U2) passes through the 7th external 5V DC voltage power supply of resistance (R7), the timing circuit end of described integrated circuit (U2) passes through the 3rd electric capacity (C3) ground connection, the current output terminal of described integrated circuit (U2) and threshold values end connect, the current output terminal of described integrated circuit (U2) is respectively through the 4th electric capacity (C4) and the 8th resistance (R8) ground connection, the frequency output terminal of described integrated circuit (U2) passes through the 9th external 5V DC voltage power supply of resistance (R9), the earth terminal ground connection of described integrated circuit (U2), the reference current end of described integrated circuit (U2) passes through the second adjustable resistance (RP2) ground connection.
2. electric tool safety protection system as claimed in claim 1, it is characterised in that described intelligent communication terminal (4) is smart mobile phone.
3. electric tool safety protection system as claimed in claim 1, it is characterised in that described control button (9) is touch key, and described status indicator lamp (5) includes dichromatic LED.
4. electric tool safety protection system as claimed in claim 1; it is characterized in that; being provided with voltage sensor and current sensor in the described second in command (7), described voltage sensor electrically connects with voltage detection module, and described current sensor electrically connects with current detection module.
5. electric tool safety protection system as claimed in claim 1, it is characterised in that be provided with temperature sensor (BT) in described temperature sensing assembly (8).
6. electric tool safety protection system as claimed in claim 1, it is characterised in that the model of described operational amplifier (U1) is TL061.
7. electric tool safety protection system as claimed in claim 1, it is characterised in that described 7th resistance (R7) and the 8th resistance (R8) are Mirror Grinding.
8. electric tool safety protection system as claimed in claim 1, it is characterised in that described swivel joint (2) is connected to drill bit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127095.8U CN205343028U (en) | 2016-02-18 | 2016-02-18 | Electric tool safety protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127095.8U CN205343028U (en) | 2016-02-18 | 2016-02-18 | Electric tool safety protection system |
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| Publication Number | Publication Date |
|---|---|
| CN205343028U true CN205343028U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620127095.8U Active CN205343028U (en) | 2016-02-18 | 2016-02-18 | Electric tool safety protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942802A (en) * | 2017-12-01 | 2018-04-20 | 陈文理 | A kind of impact type electric driven tool monitoring apparatus |
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2016
- 2016-02-18 CN CN201620127095.8U patent/CN205343028U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942802A (en) * | 2017-12-01 | 2018-04-20 | 陈文理 | A kind of impact type electric driven tool monitoring apparatus |
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Address after: Longxi Longcheng Street Community Garden Road third industrial zone, Longgang District of Shenzhen City, Guangdong province 518000 21 building first layer to the fifth layer, 34 layer first to second layers, building 37 Patentee after: Shenzhen duck Bernhard technology Limited by Share Ltd Address before: Longxi Longcheng Street Community Garden Road third industrial zone, Longgang District of Shenzhen City, Guangdong province 518000 21 building first layer to the fifth layer, 34 layer first to second layers, building 37 Patentee before: Shenzhen Bestek Electronics Co., Ltd. |