CN209962910U - State detection terminal of power switch - Google Patents
State detection terminal of power switch Download PDFInfo
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- CN209962910U CN209962910U CN201920998169.9U CN201920998169U CN209962910U CN 209962910 U CN209962910 U CN 209962910U CN 201920998169 U CN201920998169 U CN 201920998169U CN 209962910 U CN209962910 U CN 209962910U
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Abstract
The utility model discloses a state detection terminal of a power switch, which comprises an electromagnet (301), a spring (302), an armature (303) and a movable contact (306) which are arranged in a shell; the state detection terminal also comprises a detection module, the detection module comprises an MCU, a photoelectric switch (304) and a baffle (305), and the MCU and the photoelectric switch are arranged in the shell; the blocking piece is arranged on the side part of the moving contact; the photoelectric switch comprises an infrared transmitting tube (310) and an infrared receiving tube (311) which are oppositely arranged; the infrared transmitting tube and the infrared receiving tube are both connected with the MCU; when the fixed contact and the movable contact are not contacted, the blocking piece does not block a light path between the infrared emission tube and the infrared receiving tube, and after the fixed contact moves downwards to be contacted with the movable contact, the blocking piece blocks the light path between the infrared emission tube and the infrared receiving tube. The state detection terminal of the power switch can detect the switch action and the temperature, and is high in safety and reliability.
Description
Technical Field
The utility model relates to a power switch's state detection terminal.
Background
Although the conventional detection method for the state of the power switch is effective, once the auxiliary contact fails, the actual state of the power switch cannot be correctly reflected, that is, the conventional detection method has low reliability, so that a more reliable state detection terminal for the power switch is required to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a power switch's state detection terminal is provided, this power switch's state detection terminal can realize the reliable collection of state information, and easy to carry out.
The technical solution of the utility model is as follows:
a state detection terminal of a power switch comprises an electromagnet (301), a spring (302), an armature (303) and a movable contact (306) which are arranged in a shell;
the armature is positioned above the electromagnet, and the moving contact is fixed on the armature; a static contact (308) is arranged in the shell, and a moving contact (307) matched with the static contact is arranged on the moving contact; the spring is arranged between the armature and the shell and is used for resetting the armature;
the state detection terminal also comprises a detection module, the detection module comprises an MCU, a photoelectric switch (304) and a baffle (305), and the MCU and the photoelectric switch are arranged in the shell; the blocking piece is arranged on the side part of the moving contact; the photoelectric switch comprises an infrared transmitting tube (310) and an infrared receiving tube (311) which are oppositely arranged; the infrared transmitting tube and the infrared receiving tube are both connected with the MCU; when the fixed contact is not contacted with the movable contact, the blocking piece does not block a light path between the infrared emission tube and the infrared receiving tube, and after the fixed contact moves downwards to be contacted with the movable contact, the blocking piece blocks the light path between the infrared emission tube and the infrared receiving tube;
the MCU is also connected with a power supply and a wireless communication module.
And a temperature sensor is also arranged in the shell and is connected with an ADC port of the MCU through an amplifier.
The MCU is also connected with a display screen.
MCU still is connected with orientation module, and orientation module is big dipper module or GPS module.
The wireless communication module is a Lora communication module, a GPRS module, a 3G, 4G or 5G communication module.
The MCU is powered by a lithium battery, and the solar battery arranged on the shell charges the lithium battery.
MCU is present mature device, if adopt DSP or singlechip, therefore, this scheme belongs to pure hardware scheme, does not relate to any procedure and method, belongs to the object of utility model protection.
Has the advantages that:
the utility model discloses a power switch's state detection terminal has following characteristics:
(1) the state of the photoelectric switch for detecting the power switch is increased, and the detection reliability is greatly improved.
(2) Solar energy and a lithium battery are adopted for supplying power, the endurance time is guaranteed, and other power supplies do not need to be configured;
(3) the communication module is adopted to transmit the state signal and the position information to the remote server or the remote monitoring terminal, a wired line is not required to be arranged, and the implementation is easy.
(4) The display is used for displaying the detection parameters and the state parameters, and the intuition is good.
(5) The temperature sensor is adopted to detect the temperature of the switch, so that overheating alarm is realized, and the reliability of the whole switch detection is further improved. The MCU is further connected with an alarm, and if the temperature value exceeds a preset value, the alarm is started and an alarm signal is sent to the remote terminal.
In summary, the state detection terminal of the power switch has the advantages of compact structure, easy implementation, high reliability and easy configuration and implementation.
Drawings
Fig. 1 is a schematic diagram of the general structure of a state detection terminal of a power switch;
FIG. 2 is a schematic diagram of a dimming circuit;
FIG. 3 is a schematic diagram of a constant current charging circuit;
FIG. 4 is an overall circuit schematic of an amplifier with adjustable multiples;
fig. 5 is a schematic diagram of an optoelectronic switch.
Description of reference numerals: 301-electromagnet, 302-spring, 303-armature, 304-photoelectric switch, 305-blocking piece, 306-moving contact, 307-moving contact, 308-static contact, 309-temperature sensor, 310-infrared transmitting tube and 311-infrared receiving tube.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific embodiments:
example 1: referring to fig. 1 and 5, a state detection terminal of an electric power switch includes an electromagnet 301, a spring 302, an armature 303 and a movable contact 306 disposed in a housing;
the armature is positioned above the electromagnet, and the moving contact is fixed on the armature; a fixed contact 308 is arranged in the shell, and a movable contact 307 matched with the fixed contact is arranged on the movable contact; the spring is arranged between the armature and the shell and is used for resetting the armature;
the state detection terminal also comprises a detection module, the detection module comprises an MCU, a photoelectric switch 304 and a baffle 305, and the MCU and the photoelectric switch are both arranged in the shell; the blocking piece is arranged on the side part of the moving contact; the photoelectric switch comprises an infrared transmitting tube 310 and an infrared receiving tube 311 which are oppositely arranged; the infrared transmitting tube and the infrared receiving tube are both connected with the MCU; when the fixed contact is not contacted with the movable contact, the blocking piece does not block a light path between the infrared emission tube and the infrared receiving tube, and after the fixed contact moves downwards to be contacted with the movable contact, the blocking piece blocks the light path between the infrared emission tube and the infrared receiving tube;
the MCU is also connected with a power supply and a wireless communication module.
And a temperature sensor is also arranged in the shell and is connected with an ADC port of the MCU through an amplifier.
The MCU is also connected with a display screen.
MCU still is connected with orientation module, and orientation module is big dipper module or GPS module.
The wireless communication module is a Lora communication module, a GPRS module, a 3G, 4G or 5G communication module.
Still be equipped with solar cell panel on the power switch, solar cell panel passes through charging circuit and charges for the lithium cell, ensures detection module's continuous operation.
And a power supply module for supplying power to the electromagnet is also arranged in the shell.
The photoelectric switch outputs a level signal to an IO port of the MCU, which is the prior mature technology.
In addition, the other circuits and modules involved in the state detection terminal of the power switch are described as follows:
as shown in fig. 2, the state detection terminal of the power switch further includes a brightness adjusting circuit for adjusting the brightness of the display screen; the brightness adjusting circuit comprises an LED lamp string, a triode, a potentiometer Rx and an A/D converter; the triode is an NPN type triode; the knob switch is coaxially connected with the potentiometer Rx;
the potentiometer Rx and the first resistor R1 are connected in series to form a voltage division branch, one end of the voltage division branch is connected with the positive electrode Vcc of the power supply, and the other end of the voltage division branch is grounded; the connection point of the potentiometer Rx and the first resistor R1 is connected with the input end of the A/D converter; the output end of the A/D converter is connected with the data input port of the MCU;
the LED lamp string comprises a plurality of LED lamps which are connected in series; the anode of the LED lamp string is connected with the anode Vcc of the power supply; the negative electrode of the LED lamp string is connected with the C electrode of the triode, and the E electrode of the triode is grounded through a second resistor R2; the B pole of the triode is connected with the output end of the MCU. The power supply positive pole Vcc is 5V, and the A/D converter is an 8-bit serial output type converter.
Secondly, as shown in fig. 3, the constant current charging circuit for charging the lithium battery comprises a constant voltage driving chip and a current feedback circuit;
(1) the voltage output end of the constant voltage driving chip is a positive output end VOUT + of the constant current charging circuit; the negative output end of the constant voltage driving chip is grounded;
the constant voltage driving chip is powered by a direct current voltage power supply end VIN + and VIN-;
(2) the current feedback circuit comprises resistors R1, R2 and R5 and a reference voltage end VREF +;
the reference voltage end VREF + is grounded through resistors R1, R2 and R5 which are sequentially connected in series;
the connecting point of the resistor R5 and the resistor R2 is a negative output end VOUT < - >;
the connection point of the resistors R1 and R2 is connected with the feedback terminal FB of the constant voltage driving chip.
The constant current charging circuit also comprises a voltage feedback circuit;
the voltage feedback circuit comprises resistors R3 and R4 and a diode D1;
the resistors R3 and R4 are connected in series and then connected between the positive output end VOUT + of the constant current charging circuit and the ground; the connection point of the resistors R3 and R4 is connected with the anode of the diode D1; the cathode of the diode D1 is connected to the feedback terminal FB of the constant voltage driving chip.
(III), as shown in FIG. 4, the output signal of the temperature sensor is Vin; vin enters an ADC port (namely, a port with an A/D conversion function) of the MCU after being amplified by the amplifier;
because the signal is weak, an amplifier with adjustable amplification factor is designed; the specific circuit connection and working principle are as follows:
the output end Vin of the bridge rectifier (single-phase rectifier bridge) is a signal end, the signal end is connected with the inverting input end of the operational amplifier LM393 through a resistor R0, the homodromous input end of the operational amplifier LM393 is grounded through a resistor R0, the homodromous input end of the operational amplifier LM393 is also connected with 4 input channels of a 4-selected selector through 4 resistors R01-R04 respectively, the output channel of the 4-selected selector is connected with the output end Vout of the operational amplifier LM393, and the Vout is connected with the ADC end of the MCU;
in addition, 2 output ports of the MCU are respectively connected with a channel selection end A and a channel selection end B of a 4-selection selector;
calculation formula of Vout and Vin:
vout ═ Vin, (Rx + R0)/R0; wherein Rx ═ R01, R02, R03, or R04; determining which resistance to select based on the gate terminal AB; and R01, R02, R03 and R04 are each different; preferred R04-5-R03-25-R02-100-R01; r01-5 × R0. can conveniently achieve span and precision switching.
Claims (5)
1. A state detection terminal of a power switch is characterized in that the power switch comprises an electromagnet (301), a spring (302), an armature (303) and a movable contact (306) which are arranged in a shell;
the armature is positioned above the electromagnet, and the moving contact is fixed on the armature; a static contact (308) is arranged in the shell, and a moving contact (307) matched with the static contact is arranged on the moving contact; the spring is arranged between the armature and the shell and is used for resetting the armature;
the state detection terminal also comprises a detection module, the detection module comprises an MCU, a photoelectric switch (304) and a baffle (305), and the MCU and the photoelectric switch are arranged in the shell; the blocking piece is arranged on the side part of the moving contact; the photoelectric switch comprises an infrared transmitting tube (310) and an infrared receiving tube (311) which are oppositely arranged; the infrared transmitting tube and the infrared receiving tube are both connected with the MCU; when the fixed contact is not contacted with the movable contact, the blocking piece does not block a light path between the infrared emission tube and the infrared receiving tube, and after the fixed contact moves downwards to be contacted with the movable contact, the blocking piece blocks the light path between the infrared emission tube and the infrared receiving tube;
the MCU is also connected with a power supply and a wireless communication module.
2. The power switch state detection terminal of claim 1, wherein a temperature sensor is further disposed in the housing, and the temperature sensor is connected to the ADC port of the MCU through an amplifier.
3. The power switch state detection terminal of claim 1, wherein the MCU is further connected with a display screen.
4. The power switch state detection terminal according to claim 1, wherein the MCU is further connected with a positioning module, and the positioning module is a Beidou module or a GPS module.
5. The power switch state detection terminal according to any one of claims 1 to 4, wherein the wireless communication module is a Lora communication module, a GPRS module, a 3G, 4G or 5G communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920998169.9U CN209962910U (en) | 2019-06-29 | 2019-06-29 | State detection terminal of power switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920998169.9U CN209962910U (en) | 2019-06-29 | 2019-06-29 | State detection terminal of power switch |
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| Publication Number | Publication Date |
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| CN209962910U true CN209962910U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920998169.9U Active CN209962910U (en) | 2019-06-29 | 2019-06-29 | State detection terminal of power switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308389A (en) * | 2019-07-03 | 2019-10-08 | 深圳腾河电力有限公司 | A kind of information acquisition system and method for power grid |
| CN111458565A (en) * | 2020-05-11 | 2020-07-28 | 国家电网有限公司 | Medium loss and insulation resistance test conversion device |
-
2019
- 2019-06-29 CN CN201920998169.9U patent/CN209962910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308389A (en) * | 2019-07-03 | 2019-10-08 | 深圳腾河电力有限公司 | A kind of information acquisition system and method for power grid |
| CN111458565A (en) * | 2020-05-11 | 2020-07-28 | 国家电网有限公司 | Medium loss and insulation resistance test conversion device |
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