CN212008725U

CN212008725U - Distributed wireless current monitoring device for three-phase asynchronous motor

Info

Publication number: CN212008725U
Application number: CN202020300619.5U
Authority: CN
Inventors: 鲁纪平; 张忠恕; 杨博; 张益志; 葛鹏; 师小琴; 陶宏伟; 樊志海
Original assignee: Yingkou Cigarette Factory Hongta Liaoning Tobacco Co ltd
Current assignee: Yingkou Cigarette Factory Hongta Liaoning Tobacco Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2020-11-24
Anticipated expiration: 2030-10-12

Abstract

A distributed wireless current monitoring device for a three-phase asynchronous motor is characterized in that one end of an analog input module is connected with a three-phase power supply of the three-phase asynchronous motor, the other end of the analog input module is connected with a data processing module, one end of a digital input module is connected with a control signal of a contactor coil of the three-phase asynchronous motor, the other end of the digital input module is connected with the data processing module, and the data processing module is respectively connected with a wireless communication module and an alarm output module; a three-phase power supply of the three-phase asynchronous motor is respectively connected with one ends of three-phase current transformers and one ends of three line voltage transformers. The utility model discloses a can realize the distributed on-line monitoring of the ordinary three-phase asynchronous machine of single unit or many ordinary three-phase asynchronous machine electric currents, data storage, monitor information sharing through wireless communication, the bottom number that can be used in the intelligent transformation of equipment adopts the device, is applied to in the motor observes and controls technical field.

Description

Distributed wireless current monitoring device for three-phase asynchronous motor

Technical Field

The utility model relates to a distributed three-phase asynchronous motor current wireless monitoring device in the technical field of motor measurement and control.

Background

At present, a three-phase asynchronous motor is taken as key electrical equipment responsible for converting electric energy into mechanical energy in industrial production, and the stable, safe and reliable operation of the three-phase asynchronous motor is an important guarantee for continuous and efficient production. The current monitoring of the existing three-phase asynchronous motor is generally measured by a manual handheld current clamp meter or each motor is monitored by a traditional wired current meter and a traditional voltmeter. The accuracy of manually measured test data is low, the timeliness is poor, and the traditional wired monitoring hardware is redundant, difficult in wiring and disordered in data. In recent years, it has become one of the main means of intelligent diagnosis of devices to examine the change of motor load by analyzing the change of motor current. However, in order to realize current monitoring of a three-phase asynchronous motor, the existing measures generally adopt an intelligent contactor and utilize a field bus technology to perform data acquisition, but the measures need to be rewired, occupy bus nodes in an extruding manner, and are high in reconstruction and upgrade cost and high in reconstruction difficulty. Therefore, a distributed wireless monitoring device for the current of the three-phase asynchronous motor is a new problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a distributed wireless monitoring device for the current of a three-phase asynchronous motor, which solves the technical problems that the online detection of the three-phase current of the motor is realized by combining a combined circuit with wireless data transmission, and the wireless monitoring of the current of the distributed three-phase asynchronous motor is realized; the device can be installed by a single machine to realize the on-line monitoring of a single motor, and can also be installed by a plurality of devices respectively to monitor a plurality of motors simultaneously, and the devices share monitoring information through wireless communication for displaying, alarming and inquiring.

The purpose of the utility model is realized like this: a distributed wireless current monitoring device for a three-phase asynchronous motor comprises a three-phase power supply of the three-phase asynchronous motor, a contactor coil control signal of the three-phase asynchronous motor, an analog quantity input module, a digital quantity input module, a data processing module, a wireless communication module and an alarm output module, wherein one end of the analog quantity input module is connected with the three-phase power supply of the three-phase asynchronous motor, the other end of the analog quantity input module is connected with the data processing module, one end of the digital quantity input module is connected with the contactor coil control signal of the three-phase asynchronous motor, the other end of the digital quantity input module is connected with the data processing module, and the data processing module is respectively connected with the wireless communication module and the alarm output module; the analog input module consists of a three-phase current transformer, a line voltage transformer and a signal conditioning circuit; the three-phase power supply of the three-phase asynchronous motor is respectively connected with one ends of three-phase current transformers and one ends of three line voltage transformers, the other ends of the three-phase current transformers and the other ends of the line voltage transformers are respectively connected with a signal conditioning circuit, and the signal conditioning circuit is connected with a single chip microcomputer in the data processing module; the digital quantity input module consists of a key input, a filter circuit and an optical coupling isolation circuit, wherein one end of the filter circuit is in signal connection with a contactor coil for controlling the three-phase asynchronous motor, the other end of the filter circuit is connected with the optical coupling isolation circuit, the key input is connected with the filter circuit, and the optical coupling isolation circuit is connected with a single chip microcomputer in the data processing module; the key input adopts a one-touch mode keyboard; the data processing module consists of a single chip microcomputer, a serial port circuit, a storage unit, a clock circuit and a reset circuit, the single chip microcomputer is respectively connected with the serial port circuit, the storage unit, the clock circuit and the reset circuit, the serial port circuit in the data processing module is connected with the wireless communication module, and the single chip microcomputer in the data processing module is respectively connected with an audible and visual alarm circuit and a liquid crystal display circuit of the alarm output module; the singlechip adopts an ATmega64 singlechip; the wireless communication module is a wireless data transmission module of an RS232 interface, the wireless communication module is connected with a serial port circuit in the data processing module, and the wireless data transmission module adopts an E800-DTU; the alarm output module consists of an audible and visual alarm circuit, a liquid crystal display circuit and an audible and visual alarm, wherein the audible and visual alarm circuit is connected with the liquid crystal display circuit and the audible and visual alarm circuit is connected with the audible and visual alarm; the liquid crystal display adopts an LCD12864, and the audible and visual alarm adopts a 12V stroboscopic indicating alarm;

the analog input module is characterized in that an angle 1 and an angle 2 of a line voltage transformer ZMPT101B in the analog input module are respectively connected with power supply voltage detection, an angle 3 and an angle 4 of the line voltage transformer ZMPT101B are respectively connected with two ends of a resistor R1, two ends of a resistor R1 are respectively connected with a positive electrode and a negative electrode of a first integrated operational amplifier chip LM324, the positive electrode of the first integrated operational amplifier chip LM324 and the other end of the resistor R1 are respectively grounded, the negative electrode of the first integrated operational amplifier chip LM324 is respectively connected with a resistor R3, a capacitor C1 and one end of a resistor R2, the angle 3 of the first integrated operational amplifier chip LM324 is respectively connected with the other ends of a resistor R3, a capacitor C1 and a resistor R2, the angle 3 of the first integrated operational amplifier chip 324 LM is respectively connected with one end of a resistor R4 and one end of a resistor R6, the other end of a resistor R4 is respectively connected with a resistor R7, one end of a triode D1 and the negative electrode of a second integrated operational amplifier chip LM324, and the positive, the other end of the resistor R5 is grounded, the other end of the triode D1 is connected with the 3-corner of the second integrated operational amplifier chip LM324 and one end of the triode D2 respectively, the other end of the resistor R7 is connected with the other end of the triode D2 and one end of the resistor R8 respectively, the other end of the resistor R6 is connected with the other end of the resistor R8, one end of the resistor R10, one end of the capacitor C2 and the negative electrode of the third integrated operational amplifier chip LM324 respectively, the positive electrode of the third integrated operational amplifier chip LM324 is connected with one end of the resistor R9, the other end of the resistor R9 is grounded, the other ends of the resistor R10, the capacitor C2 and the 3-corner of the third integrated operational amplifier chip LM324 are connected with one ends of the resistor R11 and the resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected with one end of the capacitor; the signal conditioning circuit 3-3 adopts a chip LM 324; ZMPT101B is adopted as the line voltage transformer 3-2; the analog input module is characterized in that an angle 1 and an angle 2 of a three-phase current transformer ZMCT101D are respectively connected with power supply voltage detection, an angle 3 and an angle 4 of the three-phase current transformer ZMCT101D are respectively connected with two ends of a resistor R21, two ends of a resistor R21 are respectively connected with a positive electrode and a negative electrode of a first integrated operational amplifier chip LM324, the positive electrode of the first integrated operational amplifier chip LM324 and the other end of the resistor R21 are respectively grounded, the negative electrode of the first integrated operational amplifier chip LM324 is respectively connected with one ends of a resistor R23, a capacitor C21 and a resistor R22, the angle 3 of the first integrated operational amplifier chip LM324 is respectively connected with the other ends of a resistor R23, a capacitor C21 and a resistor R22, the angle 3 of the first integrated operational amplifier chip LM324 is respectively connected with one ends of a resistor R24 and a resistor R26, the other end of the resistor R24 is respectively connected with one end of a resistor R27, one end of a triode D21 and the negative electrode of a second integrated operational amplifier LM324, and the resistor LM324 are, the other end of the resistor R25 is grounded, the other end of the triode D21 is connected with the 3-corner of the second integrated operational amplifier chip LM324 and one end of the triode D22 respectively, the other end of the resistor R27 is connected with the other end of the triode D22 and one end of the resistor R28 respectively, the other end of the resistor R26 is connected with the other end of the resistor R28, one end of the resistor R20, one end of the capacitor C22 and the negative electrode of the third integrated operational amplifier chip LM324 respectively, the positive electrode of the third integrated operational amplifier chip LM324 is connected with one end of the resistor R29, the other end of the resistor R29 is grounded, the other ends of the resistor R20, the capacitor C22 and the 3-corner of the third integrated operational amplifier chip LM324 are connected with one ends of the resistor R31 and the resistor R30, the other end of the resistor R31 is grounded, the other end of the resistor R30 is connected with one end of the capacitor; the three-phase current transformer adopts ZMCT 101D; one end of a resistor R211, a resistor R212, a resistor R213, a resistor R214, a resistor R215, a resistor R216, a resistor R217, a resistor R218 and a resistor R219 in the digital quantity input module is respectively connected with the singlechip 5-1, one end of the resistor R211, the resistor R212, the resistor R213, the resistor R214, the resistor R215, the resistor R216, the resistor R217, the resistor R218 and the resistor R219 is also respectively connected with a 1-corner of the triode, the other end of the resistor R211, the resistor R212, the resistor R213, the resistor R214, the resistor R215, the resistor R216, the resistor R217, the resistor R218 and the resistor R219 is respectively connected with a 5-V ground, a 2-corner of the triode is connected with a 5-V power supply, a 3-corner of the triode is respectively connected with one end of the resistor R111, the resistor R112, the resistor R113, the resistor R114, the resistor R115, the resistor R116, the resistor R117, the resistor R118 and the resistor R119, and one end of the resistor R111, the resistor R112, the resistor, The other end of the resistor R118 is connected with a working power supply voltage VCC1 of the circuit, the other end of the resistor R119 is connected with a contactor coil signal 2 for controlling the three-phase asynchronous motor, 4 corners of the triode are respectively connected with one ends of a capacitor C101, a capacitor C102, a capacitor C103, a capacitor C104, a capacitor C105, a capacitor C106, a capacitor C107, a capacitor C108 and a capacitor C109, 4 corners of the triode are respectively connected with one ends of a resistor R101, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a resistor R106, a resistor R107 and a resistor R108, the other ends of the resistor R101, the resistor R102, the resistor R105, the resistor R106, the resistor R107 and the resistor R108 are respectively connected with VCC1, and the other ends of the capacitor C101, the capacitor C102, the capacitor C103, the capacitor C104, the capacitor C105, the capacitor C106, the capacitor C107, the capacitor C108 and the; the 2 angle of a serial port connector DB9 of a serial port circuit in the data processing module 5 is respectively connected with a voltage stabilizing diode VD1, a voltage stabilizing diode VD2 and a T10UT angle of a serial port chip MAX232, the voltage stabilizing diode VD1 and the voltage stabilizing diode VD2 are respectively connected with 5V ground, the 7 angle of the serial port connector DB9 of the serial port circuit 5-2 is respectively connected with the voltage stabilizing diode VD1 and an R1IN angle of the serial port chip MAX232, the 5 angle of a serial port connector DB9 of the serial port circuit 5-2 is connected with one end of a capacitor 41, the other end of the capacitor 41 is respectively connected with one end of a capacitor 43, an operating power supply 5VTX and a VCC angle of the serial port chip MAX232, the ground angle of the serial port chip MAX232 is connected with the 5V ground, the other end of the capacitor 43 is connected with a V + angle of the serial port chip MAX232, the two ends of the capacitor 42 are respectively connected with a C1+ angle of the serial port chip MAX232 and a C1-angle of the serial port chip MAX232, the two ends of the capacitor, one end of the capacitor 45 is connected with the V-angle of the serial port chip MAX232, the other end of the capacitor 45 is connected with 5V ground, the R10UT angle of the serial port chip MAX232 is connected with the PD2 angle of the single chip microcomputer 5-1, the R10UT angle of the serial port chip MAX232 is connected with the PD2 angle of the single chip microcomputer, and the T1IN angle of the serial port chip MAX232 is connected with the PD3 angle of the single chip microcomputer 5-1; the serial port circuit 5-2 adopts an RS232 interface; e0 angle, E1 angle, E1 angle and VSS angle of a chip AT24C256 of a storage unit in the data processing module are respectively grounded, the VSS angle of the chip AT24C256 is connected with a working power supply 5VXT, and a MODE/WC angle of the chip AT24C256 is grounded; the storage unit adopts a chip AT24C 256; one end of a capacitor C51 and one end of a capacitor C52 of a clock circuit in the data processing module are respectively grounded, the other end of a capacitor 51 and the other end of a capacitor C52 are respectively connected with two ends of a crystal oscillator Y1, two ends of a crystal oscillator Y1 are respectively connected with an X1 angle of a clock chip DS1302 and an X2 angle of the clock chip DS1302, a grounding angle of the clock chip DS1302 is grounded, a VCC2 angle of the clock chip DS1302 is respectively connected with one end of the capacitor C53 and an operating power supply 5VXT, the other end of a capacitor C53 is grounded, one end of a battery BT1 is grounded, the other end of a battery BT1 is connected with a VCC1 angle of the clock chip DS1302, the operating power supply 5VXT is respectively connected with one end of a resistor R51, a resistor R52 and a resistor R53, and the other ends of a resistor R51, a resistor R52 and a resistor R53 are respectively connected with an I/O angle of the clock chip DS1302, the clock chip DS 1302K 1302, the; one end of a capacitor C61 and one end of a key S1 of the reset circuit in the data processing module are respectively grounded, the other end of a capacitor C61 is connected with one end of a resistor R61, the other end of the resistor R61 is connected with one end of a diode D61 through a diode, and the other end of a diode D61 is connected with the other end of the key S1; an ANOD angle of an optocoupler TLP250-1 in the alarm output module is connected with a single chip microcomputer pin PB5, an NC angle of the optocoupler TLP250-1 is grounded, a Vo7 angle and a Vo6 angle of the optocoupler TLP250-1 are respectively connected with an alarm, and a grounding angle 12V of the optocoupler TLP250-1 is grounded and connected with the alarm.

The main point of the utility model lies in its structure. The working principle is that a three-phase power supply of the motor is connected with a three-phase current transformer and a line voltage transformer, current and voltage are converted into small signals and then are sent to a single chip microcomputer through a signal conditioning circuit, and the collection of the working current and voltage of the motor is realized; the digital quantity input module realizes the acquisition of the working state (starting or stopping) of the motor and the setting of alarm parameters; the data processing module carries out operation according to the current and voltage acquisition values and the alarm parameters, judges whether to alarm or not, and simultaneously sends the acquired data to an upper computer or a wireless monitoring device through the wireless communication module; the alarm output module realizes acousto-optic alarm and alarm information display and has the function of monitoring data query.

Compared with the prior art, the distributed wireless monitoring device for the current of the three-phase asynchronous motor has the advantages that:

(1) the current of a single common three-phase asynchronous motor or a plurality of common three-phase asynchronous motors can be monitored and stored on line in a distributed mode, and monitoring information is shared through wireless communication;

(2) the manufacturing cost is low, the size is small, the on-site installation requirement can be met, and the adaptability is strong;

(3) the motor can be widely applied to common three-phase asynchronous motors in production workshops of various industries and can be used as a bottom layer data acquisition device in equipment intelligent transformation;

the method can be widely applied to the technical field of motor measurement and control.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and examples.

Fig. 1 is a block diagram of the present invention.

Fig. 2 is a partial structural schematic diagram of the voltage transformer of the analog input module of the present invention.

Fig. 3 is a schematic diagram of a current transformer of the analog input module of the present invention.

Fig. 4 is a schematic diagram of a partial structure of the digital input module of the present invention.

Fig. 5 is a schematic diagram of the structure of the serial port circuit part of the data processing module of the present invention.

Fig. 6 is a schematic structural diagram of a part of the storage unit of the data processing module of the present invention.

Fig. 7 is a schematic diagram of a clock circuit part of the data processing module according to the present invention.

Fig. 8 is a schematic structural diagram of a reset circuit portion of the data processing module of the present invention.

Fig. 9 is a schematic diagram of the structure of the alarm output module.

Detailed Description

Referring to the attached drawings, the distributed wireless monitoring device for the current of the three-phase asynchronous motor comprises a three-phase power supply 1 of the three-phase asynchronous motor, a contactor coil control signal 2 of the three-phase asynchronous motor, an analog input module 3, a digital input module 4, a data processing module 5, a wireless communication module 6 and an alarm output module 7, wherein one end of the analog input module 3 is connected with the three-phase power supply 1 of the three-phase asynchronous motor, the other end of the analog input module 3 is connected with the data processing module 5, one end of the digital input module 4 is connected with the contactor coil control signal 2 of the three-phase asynchronous motor, the other end of the digital input module 4 is connected with the data processing module 5, and the data processing module 5 is respectively connected with the wireless communication module 6 and the alarm output module 7; the analog input module 3 consists of a three-phase current transformer 3-1, a line voltage transformer 3-2 and a signal conditioning circuit 3-3; a three-phase power supply 1 of the three-phase asynchronous motor is respectively connected with one ends of three-phase current transformers 3-1 and one ends of three line voltage transformers 3-2, the other ends of the three-phase current transformers 3-1 and the other ends of the line voltage transformers 3-2 are respectively connected with a signal conditioning circuit 3-3, and the signal conditioning circuit 3-3 is connected with a single chip microcomputer 5-1 in a data processing module 5; the digital quantity input module 4 consists of a key input 4-1, a filter circuit 4-2 and an optical coupling isolation circuit 4-3, one end of the filter circuit 4-2 is connected with a contactor coil signal 2 for controlling the three-phase asynchronous motor, the other end of the filter circuit 4-2 is connected with the optical coupling isolation circuit 4-3, the key input 4-1 is connected with the filter circuit 4-2, and the optical coupling isolation circuit 4-3 is connected with a single chip microcomputer 5-1 in the data processing module 5; the key input adopts a one-touch mode keyboard; the data processing module 5 consists of a single chip microcomputer 5-1, a serial port circuit 5-2, a storage unit 5-3, a clock circuit 5-4 and a reset circuit 5-5, wherein the single chip microcomputer 5-1 is respectively connected with the serial port circuit 5-2, the storage unit 5-3, the clock circuit 5-4 and the reset circuit 5-5, the serial port circuit 5-2 in the data processing module 5 is connected with a wireless communication module 6, and the single chip microcomputer 5-1 in the data processing module 5 is respectively connected with an acousto-optic alarm circuit 7-1 and a liquid crystal display circuit 7-2 of an alarm output module 7; the singlechip 5-1 adopts an ATmega64 singlechip; the wireless communication module 6 is a wireless data transmission module with an RS232 interface, the wireless communication module 6 is connected with a serial port circuit 5-2 in the data processing module 5, and the wireless data transmission module adopts an E800-DTU; the alarm output module 7 consists of an acousto-optic alarm circuit 7-1, a liquid crystal display circuit 7-2 and an acousto-optic alarm 7-3, wherein the acousto-optic alarm circuit 7-1 is connected with the liquid crystal display circuit 7-2, and the acousto-optic alarm circuit 7-1 is connected with the acousto-optic alarm 7-3; the LCD adopts LCD12864, and the audible and visual alarm 7-3 adopts 12V stroboscopic indicating alarm.

The analog input module 3 is characterized in that the 1 angle and the 2 angle of a line voltage transformer 3-2ZMPT101B in the analog input module 3 are respectively connected with power supply voltage detection, the 3 angle and the 4 angle of the line voltage transformer 3-2ZMPT101B are respectively connected with the two ends of a resistor R1, the two ends of a resistor R1 are respectively connected with the anode and the cathode of a first integrated operational amplifier chip LM324, the anode of the first integrated operational amplifier chip LM324 and the other end of the resistor R1 are respectively grounded, the cathode of the first integrated operational amplifier chip LM324 is respectively connected with a resistor R3, a capacitor C1 and one end of a resistor R2, the 3 angle of the first integrated operational amplifier chip LM324 is respectively connected with the other ends of a resistor R3, a capacitor C1 and a resistor R2, the 3 angle of the first integrated operational amplifier chip LM324 is respectively connected with one end of a resistor R4 and one end of a resistor R6, the other end of the resistor R4 is respectively connected with one end of a resistor R7, one end of a triode D1, the cathode of a second integrated operational amplifier chip LM324 and the anode, the other end of the resistor R5 is grounded, the other end of the triode D1 is connected with the 3-corner of the second integrated operational amplifier chip LM324 and one end of the triode D2 respectively, the other end of the resistor R7 is connected with the other end of the triode D2 and one end of the resistor R8 respectively, the other end of the resistor R6 is connected with the other end of the resistor R8, one end of the resistor R10, one end of the capacitor C2 and the negative electrode of the third integrated operational amplifier chip LM324 respectively, the positive electrode of the third integrated operational amplifier chip LM324 is connected with one end of the resistor R9, the other end of the resistor R9 is grounded, the other ends of the resistor R10, the capacitor C2 and the 3-corner of the third integrated operational amplifier chip LM324 are connected with one ends of the resistor R11 and the resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected with one end of the capacitor; the signal conditioning circuit 3-3 adopts a chip LM 324; ZMPT101B is adopted as the line voltage transformer 3-2; the analog input module 3 is characterized in that the 1 angle and the 2 angle of a three-phase current transformer 3-1ZMCT101D are respectively connected with power supply voltage detection, the 3 angle and the 4 angle of the three-phase current transformer 3-1ZMCT101D are respectively connected with the two ends of a resistor R21, the two ends of the resistor R21 are respectively connected with the anode and the cathode of a first integrated operational amplifier chip LM324, the anode of the first integrated operational amplifier chip LM324 and the other end of the resistor R21 are respectively grounded, the cathode of the first integrated operational amplifier chip LM324 is respectively connected with one end of a resistor R23, a capacitor C21 and a resistor R22, the 3 angle of the first integrated operational amplifier chip LM324 is respectively connected with the other end of a resistor R23, a capacitor C21 and a resistor R22, the 3 angle of the first integrated operational amplifier chip LM324 is respectively connected with one end of a resistor R24 and one end of a resistor R26, the other end of the resistor R24 is respectively connected with one end of a resistor R27, one end of a triode D21, the cathode of a second integrated operational amplifier LM324 and the anode of the integrated amplifier, the other end of the resistor R25 is grounded, the other end of the triode D21 is connected with the 3-corner of the second integrated operational amplifier chip LM324 and one end of the triode D22 respectively, the other end of the resistor R27 is connected with the other end of the triode D22 and one end of the resistor R28 respectively, the other end of the resistor R26 is connected with the other end of the resistor R28, one end of the resistor R20, one end of the capacitor C22 and the negative electrode of the third integrated operational amplifier chip LM324 respectively, the positive electrode of the third integrated operational amplifier chip LM324 is connected with one end of the resistor R29, the other end of the resistor R29 is grounded, the other ends of the resistor R20, the capacitor C22 and the 3-corner of the third integrated operational amplifier chip LM324 are connected with one ends of the resistor R31 and the resistor R30, the other end of the resistor R31 is grounded, the other end of the resistor R30 is connected with one end of the capacitor; the three-phase current transformer adopts ZMCT 101D; one end of a resistor R211, a resistor R212, a resistor R213, a resistor R214, a resistor R215, a resistor R216, a resistor R217, a resistor R218 and a resistor R219 in the digital quantity input module 4 is respectively connected with the singlechip 5-1, one end of the resistor R211, the resistor R212, the resistor R213, the resistor R214, the resistor R215, the resistor R216, the resistor R217, the resistor R218 and the resistor R219 is also respectively connected with a 1 corner of the triode, the other end of the resistor R211, the resistor R212, the resistor R213, the resistor R214, the resistor R215, the resistor R216, the resistor R217, the resistor R218 and the resistor R219 is respectively connected with a 5V ground, a 2 corner of the triode is connected with a 5V power supply, a 3 corner of the triode is respectively connected with one end of the resistor R111, the resistor R112, the resistor R115, the resistor R117, the resistor R114, the resistor R115, the resistor R116, the resistor R117, the resistor R118 and the resistor R119, and one end of the resistor R116, The other end of the resistor R118 is connected with a working power supply voltage VCC1 of the circuit, the other end of the resistor R119 is connected with a contactor coil signal 2 for controlling the three-phase asynchronous motor, 4 corners of the triode are respectively connected with one ends of a capacitor C101, a capacitor C102, a capacitor C103, a capacitor C104, a capacitor C105, a capacitor C106, a capacitor C107, a capacitor C108 and a capacitor C109, 4 corners of the triode are respectively connected with one ends of a resistor R101, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a resistor R106, a resistor R107 and a resistor R108, the other ends of the resistor R101, the resistor R102, the resistor R105, the resistor R106, the resistor R107 and the resistor R108 are respectively connected with VCC1, and the other ends of the capacitor C101, the capacitor C102, the capacitor C103, the capacitor C104, the capacitor C105, the capacitor C106, the capacitor C107, the capacitor C108 and the; the 2-angle of a serial port connector DB9 of a serial port circuit 5-2 in the data processing module 5 is respectively connected with a voltage stabilizing diode VD1, a voltage stabilizing diode VD2 and a T10 UT-angle of a serial port chip MAX232, the voltage stabilizing diode VD1 and the voltage stabilizing diode VD2 are connected with 5V ground, the 7-angle of the serial port connector DB9 of the serial port circuit 5-2 is respectively connected with the voltage stabilizing diode VD1 and the R1 IN-angle of the serial port chip MAX232, the 5-angle of a serial port connector DB9 of the serial port circuit 5-2 is connected with one end of a capacitor 41, the other end of the capacitor 41 is respectively connected with one end of a capacitor 43, an operating power supply 5VTX and a VCC-angle of the serial port chip MAX232, the ground angle of the serial port chip MAX232 is connected with 5V ground, the other end of the capacitor 43 is connected with a V + angle of the serial port chip MAX232, the two ends of the capacitor 42 are respectively connected with a C1+ angle of the serial port chip MAX232 and a C1-angle of the serial port chip MAX 2-2, one end of the capacitor 45 is connected with the V-angle of the serial port chip MAX232, the other end of the capacitor 45 is connected with 5V ground, the R10UT angle of the serial port chip MAX232 is connected with the PD2 angle of the single chip microcomputer 5-1, the R10UT angle of the serial port chip MAX232 is connected with the PD2 angle of the single chip microcomputer 5-1, and the T1IN angle of the serial port chip MAX232 is connected with the PD3 angle of the single chip microcomputer 5-1; the serial port circuit 5-2 adopts an RS232 interface; e0 corner, E1 corner, E1 corner and VSS corner of the chip AT24C256 of the memory unit 5-3 in the data processing module 5 are grounded respectively, the VSS corner of the chip AT24C256 is connected with a working power supply 5VXT, and the MODE/WC corner of the chip AT24C256 is grounded; the storage unit 5-3 adopts a chip AT24C 256; one end of a capacitor C51 and one end of a capacitor C52 of a clock circuit 5-4 in the data processing module 5 are grounded respectively, the other end of a capacitor 51 and the other end of a capacitor C52 are connected with two ends of a crystal oscillator Y1 respectively, two ends of a crystal oscillator Y1 are connected with an X1 angle of a clock chip DS1302 and an X2 angle of the clock chip DS1302 respectively, a grounding angle of the clock chip DS1302 is grounded, a VCC2 angle of the clock chip DS1302 is connected with one end of a capacitor C53 and an operating power supply 5VXT respectively, the other end of a capacitor C53 is grounded, one end of a battery BT1 is grounded, the other end of a battery BT1 is connected with a VCC1 angle of the clock chip DS1302, the operating power supply 5VXT is connected with a resistor R51, a resistor R52 and one end of a resistor R53 respectively, and the other ends of a resistor R51, a resistor R52 and a resistor R53 are connected with a SCLK angle of the clock chip DS1302, an I/O angle of the clock chip DS 1302; one end of a capacitor C61 and one end of a key S1 of a reset circuit 5-5 in the data processing module 5 are respectively grounded, the other end of a capacitor C61 is connected with one end of a resistor R61, the other end of the resistor R61 is connected with one end of a diode D61, and the other end of a diode D61 is connected with the other end of the key S1; an ANOD angle of an optocoupler TLP250-1 in the alarm output module 7 is connected with a single chip microcomputer pin PB5, an NC angle of the optocoupler TLP250-1 is grounded, a Vo7 angle and a Vo6 angle of the optocoupler TLP250-1 are respectively connected with an alarm, and a grounding angle 12V of the optocoupler TLP250-1 is grounded and connected with the alarm.

The working principle of the distributed wireless current monitoring device for the three-phase asynchronous motor is that a three-phase power supply of the motor is connected with a three-phase current transformer 3-1 and a line voltage transformer 3-2, and the current and the voltage are converted into small signals and then are sent to a single chip microcomputer 5-1 through a signal conditioning circuit 3-3, so that the working current and the working voltage of the motor are collected; the digital quantity input module 4 realizes the collection of the working state (starting or stopping) of the motor and the setting of alarm parameters; the data processing module 5 calculates according to the current and voltage acquisition values and the alarm parameters, judges whether to alarm or not, and simultaneously sends the acquired data to an upper computer or a wireless monitoring device through the wireless communication module 6; the alarm output module 7 realizes sound-light alarm and alarm information display, and has the function of monitoring data query.

Claims

1. The utility model provides a distributed three-phase asynchronous motor current wireless monitoring device, includes three-phase asynchronous motor's three-phase power supply, three-phase asynchronous motor's contactor coil control signal, analog input module, digital input module, data processing module, wireless communication module, alarm output module, its characterized in that: one end of the analog quantity input module is connected with a three-phase power supply of the three-phase asynchronous motor, the other end of the analog quantity input module is connected with the data processing module, one end of the digital quantity input module is connected with a contactor coil control signal of the three-phase asynchronous motor, the other end of the digital quantity input module is connected with the data processing module, and the data processing module is respectively connected with the wireless communication module and the alarm output module; the analog input module consists of a three-phase current transformer, a line voltage transformer and a signal conditioning circuit; the three-phase power supply of the three-phase asynchronous motor is respectively connected with one ends of three-phase current transformers and one ends of three line voltage transformers, the other ends of the three-phase current transformers and the other ends of the line voltage transformers are respectively connected with a signal conditioning circuit, and the signal conditioning circuit is connected with a single chip microcomputer in the data processing module; the digital quantity input module consists of a key input, a filter circuit and an optical coupling isolation circuit, wherein one end of the filter circuit is in signal connection with a contactor coil for controlling the three-phase asynchronous motor, the other end of the filter circuit is connected with the optical coupling isolation circuit, the key input is connected with the filter circuit, and the optical coupling isolation circuit is connected with a single chip microcomputer in the data processing module; the key input adopts a one-touch mode keyboard; the data processing module consists of a single chip microcomputer, a serial port circuit, a storage unit, a clock circuit and a reset circuit, the single chip microcomputer is respectively connected with the serial port circuit, the storage unit, the clock circuit and the reset circuit, the serial port circuit in the data processing module is connected with the wireless communication module, and the single chip microcomputer in the data processing module is respectively connected with an audible and visual alarm circuit and a liquid crystal display circuit of the alarm output module; the singlechip adopts an ATmega64 singlechip; the wireless communication module is a wireless data transmission module of an RS232 interface, the wireless communication module is connected with a serial port circuit in the data processing module, and the wireless data transmission module adopts an E800-DTU; the alarm output module consists of an audible and visual alarm circuit, a liquid crystal display circuit and an audible and visual alarm, wherein the audible and visual alarm circuit is connected with the liquid crystal display circuit and the audible and visual alarm circuit is connected with the audible and visual alarm; the LCD adopts LCD12864, and the audible and visual alarm adopts 12V stroboscopic indicating alarm.

2. A distributed wireless monitoring device for currents of three-phase asynchronous motors according to claim 1, wherein: the analog input module is characterized in that an angle 1 and an angle 2 of a line voltage transformer ZMPT101B in the analog input module are respectively connected with power supply voltage detection, an angle 3 and an angle 4 of the line voltage transformer ZMPT101B are respectively connected with two ends of a resistor R1, two ends of a resistor R1 are respectively connected with a positive electrode and a negative electrode of a first integrated operational amplifier chip LM324, the positive electrode of the first integrated operational amplifier chip LM324 and the other end of the resistor R1 are respectively grounded, the negative electrode of the first integrated operational amplifier chip LM324 is respectively connected with a resistor R3, a capacitor C1 and one end of a resistor R2, the angle 3 of the first integrated operational amplifier chip LM324 is respectively connected with the other ends of a resistor R3, a capacitor C1 and a resistor R2, the angle 3 of the first integrated operational amplifier chip 324 LM is respectively connected with one end of a resistor R4 and one end of a resistor R6, the other end of a resistor R4 is respectively connected with a resistor R7, one end of a triode D1 and the negative electrode of a second integrated operational amplifier chip LM324, and the positive, the other end of the resistor R5 is grounded, the other end of the triode D1 is connected with the 3-corner of the second integrated operational amplifier chip LM324 and one end of the triode D2 respectively, the other end of the resistor R7 is connected with the other end of the triode D2 and one end of the resistor R8 respectively, the other end of the resistor R6 is connected with the other end of the resistor R8, one end of the resistor R10, one end of the capacitor C2 and the negative electrode of the third integrated operational amplifier chip LM324 respectively, the positive electrode of the third integrated operational amplifier chip LM324 is connected with one end of the resistor R9, the other end of the resistor R9 is grounded, the other ends of the resistor R10, the capacitor C2 and the 3-corner of the third integrated operational amplifier chip LM324 are connected with one ends of the resistor R11 and the resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected with one end of the capacitor; the signal conditioning circuit 3-3 adopts a chip LM 324; ZMPT101B is adopted as the line voltage transformer 3-2; the analog input module is characterized in that an angle 1 and an angle 2 of a three-phase current transformer ZMCT101D are respectively connected with power supply voltage detection, an angle 3 and an angle 4 of the three-phase current transformer ZMCT101D are respectively connected with two ends of a resistor R21, two ends of a resistor R21 are respectively connected with a positive electrode and a negative electrode of a first integrated operational amplifier chip LM324, the positive electrode of the first integrated operational amplifier chip LM324 and the other end of the resistor R21 are respectively grounded, the negative electrode of the first integrated operational amplifier chip LM324 is respectively connected with one ends of a resistor R23, a capacitor C21 and a resistor R22, the angle 3 of the first integrated operational amplifier chip LM324 is respectively connected with the other ends of a resistor R23, a capacitor C21 and a resistor R22, the angle 3 of the first integrated operational amplifier chip LM324 is respectively connected with one ends of a resistor R24 and a resistor R26, the other end of the resistor R24 is respectively connected with one end of a resistor R27, one end of a triode D21 and the negative electrode of a second integrated operational amplifier LM324, and the resistor LM324 are, the other end of the resistor R25 is grounded, the other end of the triode D21 is connected with the 3-corner of the second integrated operational amplifier chip LM324 and one end of the triode D22 respectively, the other end of the resistor R27 is connected with the other end of the triode D22 and one end of the resistor R28 respectively, the other end of the resistor R26 is connected with the other end of the resistor R28, one end of the resistor R20, one end of the capacitor C22 and the negative electrode of the third integrated operational amplifier chip LM324 respectively, the positive electrode of the third integrated operational amplifier chip LM324 is connected with one end of the resistor R29, the other end of the resistor R29 is grounded, the other ends of the resistor R20, the capacitor C22 and the 3-corner of the third integrated operational amplifier chip LM324 are connected with one ends of the resistor R31 and the resistor R30, the other end of the resistor R31 is grounded, the other end of the resistor R30 is connected with one end of the capacitor; the three-phase current transformer adopts ZMCT 101D; one end of a resistor R211, a resistor R212, a resistor R213, a resistor R214, a resistor R215, a resistor R216, a resistor R217, a resistor R218 and a resistor R219 in the digital quantity input module is respectively connected with the singlechip 5-1, one end of the resistor R211, the resistor R212, the resistor R213, the resistor R214, the resistor R215, the resistor R216, the resistor R217, the resistor R218 and the resistor R219 is also respectively connected with a 1-corner of the triode, the other end of the resistor R211, the resistor R212, the resistor R213, the resistor R214, the resistor R215, the resistor R216, the resistor R217, the resistor R218 and the resistor R219 is respectively connected with a 5-V ground, a 2-corner of the triode is connected with a 5-V power supply, a 3-corner of the triode is respectively connected with one end of the resistor R111, the resistor R112, the resistor R113, the resistor R114, the resistor R115, the resistor R116, the resistor R117, the resistor R118 and the resistor R119, and one end of the resistor R111, the resistor R112, the resistor, The other end of the resistor R118 is connected with a working power supply voltage VCC1 of the circuit, the other end of the resistor R119 is connected with a contactor coil signal 2 for controlling the three-phase asynchronous motor, 4 corners of the triode are respectively connected with one ends of a capacitor C101, a capacitor C102, a capacitor C103, a capacitor C104, a capacitor C105, a capacitor C106, a capacitor C107, a capacitor C108 and a capacitor C109, 4 corners of the triode are respectively connected with one ends of a resistor R101, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a resistor R106, a resistor R107 and a resistor R108, the other ends of the resistor R101, the resistor R102, the resistor R105, the resistor R106, the resistor R107 and the resistor R108 are respectively connected with VCC1, and the other ends of the capacitor C101, the capacitor C102, the capacitor C103, the capacitor C104, the capacitor C105, the capacitor C106, the capacitor C107, the capacitor C108 and the; the 2 angle of a serial port connector DB9 of a serial port circuit in the data processing module 5 is respectively connected with a voltage stabilizing diode VD1, a voltage stabilizing diode VD2 and a T10UT angle of a serial port chip MAX232, the voltage stabilizing diode VD1 and the voltage stabilizing diode VD2 are respectively connected with 5V ground, the 7 angle of the serial port connector DB9 of the serial port circuit 5-2 is respectively connected with the voltage stabilizing diode VD1 and an R1IN angle of the serial port chip MAX232, the 5 angle of a serial port connector DB9 of the serial port circuit 5-2 is connected with one end of a capacitor 41, the other end of the capacitor 41 is respectively connected with one end of a capacitor 43, an operating power supply 5VTX and a VCC angle of the serial port chip MAX232, the ground angle of the serial port chip MAX232 is connected with the 5V ground, the other end of the capacitor 43 is connected with a V + angle of the serial port chip MAX232, the two ends of the capacitor 42 are respectively connected with a C1+ angle of the serial port chip MAX232 and a C1-angle of the serial port chip MAX232, the two ends of the capacitor, one end of the capacitor 45 is connected with the V-angle of the serial port chip MAX232, the other end of the capacitor 45 is connected with 5V ground, the R10UT angle of the serial port chip MAX232 is connected with the PD2 angle of the single chip microcomputer 5-1, the R10UT angle of the serial port chip MAX232 is connected with the PD2 angle of the single chip microcomputer, and the T1IN angle of the serial port chip MAX232 is connected with the PD3 angle of the single chip microcomputer 5-1; the serial port circuit 5-2 adopts an RS232 interface; e0 angle, E1 angle, E1 angle and VSS angle of a chip AT24C256 of a storage unit in the data processing module are respectively grounded, the VSS angle of the chip AT24C256 is connected with a working power supply 5VXT, and a MODE/WC angle of the chip AT24C256 is grounded; the storage unit adopts a chip AT24C 256; one end of a capacitor C51 and one end of a capacitor C52 of a clock circuit in the data processing module are respectively grounded, the other end of a capacitor 51 and the other end of a capacitor C52 are respectively connected with two ends of a crystal oscillator Y1, two ends of a crystal oscillator Y1 are respectively connected with an X1 angle of a clock chip DS1302 and an X2 angle of the clock chip DS1302, a grounding angle of the clock chip DS1302 is grounded, a VCC2 angle of the clock chip DS1302 is respectively connected with one end of the capacitor C53 and an operating power supply 5VXT, the other end of a capacitor C53 is grounded, one end of a battery BT1 is grounded, the other end of a battery BT1 is connected with a VCC1 angle of the clock chip DS1302, the operating power supply 5VXT is respectively connected with one end of a resistor R51, a resistor R52 and a resistor R53, and the other ends of a resistor R51, a resistor R52 and a resistor R53 are respectively connected with an I/O angle of the clock chip DS1302, the clock chip DS 1302K 1302, the; one end of a capacitor C61 and one end of a key S1 of the reset circuit in the data processing module are respectively grounded, the other end of a capacitor C61 is connected with one end of a resistor R61, the other end of the resistor R61 is connected with one end of a diode D61 through a diode, and the other end of a diode D61 is connected with the other end of the key S1; an ANOD angle of an optocoupler TLP250-1 in the alarm output module is connected with a single chip microcomputer pin PB5, an NC angle of the optocoupler TLP250-1 is grounded, a Vo7 angle and a Vo6 angle of the optocoupler TLP250-1 are respectively connected with an alarm, and a grounding angle 12V of the optocoupler TLP250-1 is grounded and connected with the alarm.