CN105353307A - On-line main operating parameter monitoring system for mine motor - Google Patents

Abstract

The invention belongs to the technical field of on-line monitoring of motors, and particularly relates to an on-line main operating parameter monitoring system for a mine motor. The on-line main operating parameter monitoring system for the mine motor is composed of a DSP (Digital Signal Processor), a simulator, a programmable computer, a reset unit, a display unit, a current sensor, a temperature sensor, a torque sensor, a revolution speed sensor, a gas sensor, a humidity sensor, a working environment, a signal isolating unit, a signal conversion unit, a sound-light alarm unit, a communication unit and a remote monitoring system. The on-line main operating parameter monitoring system can acquire the current, temperature, torque, revolution speed as well as gas content and humidity information of the working environment of the motor, performs processing and remote transmission, has the advantages of high measurement precision, good stability, strong anti-interference performance and the like, is suitable for severe environments of mines and occasions where motors are used frequently, improves the reliability and the stability of the mine motor, ensures safe production and people's life and property safety, and is significant.

Description

On-line Monitoring System of Main Parameters of Mine Motor Operation

technical field

The invention belongs to the technical field of on-line monitoring of electric motors, and in particular relates to an on-line monitoring system of main operating parameters of mining electric motors.

Background technique

At present, my country's coal mine safety production situation continues to improve, the coal mining environment has been improved, the total number of accidents and the death rate per million tons are decreasing year by year, but the situation of coal mine safety production is still severe, and major production accidents occur from time to time, which restricts safety production issues The underlying hidden dangers have not been effectively dealt with. Coal mine motors are the most widely used production equipment in underground mines, and they are also the most prone to failures. Therefore, the performance of coal mine motors directly restricts the quality of coal mine power grids (motor starting and braking have a greater impact on the power grid) and whether safe production can go smoothly. carry out. On-line monitoring and evaluation of motor status refers to the real-time measurement of various performance parameters and product quality index parameters during the motor operation process, and then feeds back to the processor for data calculation, analysis and processing, and calls the status evaluation database to judge the operating status of the motor. The state evaluation results of the motor are divided into three types: normal state, abnormal state and fault state.

Contents of the invention

In order to solve the technical problems existing in the prior art, the present invention proposes an on-line monitoring system for the main parameters of mine motor operation. The operation status and gas concentration of the motor are obtained through calculation and processing, and an alarm is given when the motor fails or the gas exceeds the standard. At the same time, data communication with the remote computer can be realized.

The present invention realizes the purpose of the invention through the following technical solutions:

On-line monitoring system for the main parameters of mine motor operation, the programming interface of DSP3 is connected with the output end of the emulator, the output end of the emulator is connected with the output end of the programming computer, and the output end of the reset unit is connected with the reset interface of DSP , the input terminal of the display unit is connected with the signal output terminal of DSP3, the signal input terminal of the current transformer is connected with the three-phase winding of the mining motor, the output terminal of the current transformer is connected with the input terminal of the signal isolation unit, the temperature The sensor is fixed on the mining motor, the output end of the temperature sensor is connected to the input end of the signal isolation unit, the torque sensor and the speed sensor are connected to the main shaft of the motor, the output end of the torque sensor and the speed sensor is connected to the input end of the signal isolation unit The gas sensor and the humidity sensor are connected in the working environment of the motor, the output terminals of the gas sensor and the humidity sensor are connected with the input terminals of the signal isolation unit, and the output terminals of the signal isolation unit are connected with the input terminals of the signal conversion unit. The output end of the signal conversion unit is connected with the signal input end of the DSP, the input end of the sound and light alarm unit is connected with the signal output end of the DSP, the input end of the communication unit is connected with the communication structure line of the DSP, and the output end of the communication unit is connected with the DSP signal output end. The communication interface of the remote monitoring system is connected.

The current sensor, temperature sensor, torque sensor, speed sensor, gas sensor and humidity sensor collect the mine motor current, temperature, torque, speed and the gas content and humidity of the working environment in real time, after passing through the signal isolation unit and the signal conversion unit It becomes an analog signal that can be recognized by DSP. DSP calculates and processes the output information of the sensor and compares it with the safety value in the database to obtain the running state and working environment index of the motor. The optical alarm unit gives an alarm; the monitoring system uses the SPI communication interface to send the operating parameters and environmental information of the mine motor to the remote monitoring system in real time.

The temperature sensor is AD590, a current type integrated temperature sensor developed by American AD Company. When the measured temperature is constant, it is equivalent to a constant current source, and outputs a current signal of 1 μA/K proportional to the absolute temperature. It has a strong Linearity and anti-interference ability; paste the AD590 temperature sensor on the surface of the coal mine motor. As the temperature of the motor increases, the temperature of the AD590 also increases, and the output current also increases. The current signal is converted into a voltage signal. The signal isolation and conversion unit is sent to the DSP.

The temperature detection circuit of the temperature sensor is: the output terminal of the temperature sensor AD590 is connected to one end of the resistors R1 and R3, the other end of the resistor R1 is connected to the ground through the sliding resistor R2, and the other end of the resistor R3 is connected to the operational amplifier LM358 The positive input terminal of the operational amplifier LM358 is connected to the negative input terminal of the operational amplifier LM358 through the resistor R5 and its output terminal, the output terminal of the LM358 is connected to the positive input terminal of the voltage comparator LM361, and the resistor R4 and the sliding resistor R6 are connected in series. Connect to the positive and negative terminals of the power supply respectively, the negative input terminal of the voltage comparator LM361 is connected between the resistor R4 and the sliding resistor R6, the output terminal of the voltage comparator LM361 is connected to the input terminal of the optocoupler HCNR201, and the resistor R7 is connected to the input terminal of the optocoupler HCNR201 respectively. The negative power supply terminal of the optocoupler HCNR201 is connected to the ground phase, the resistor R8 is respectively connected to the positive terminal of the power supply and the output terminal of the optocoupler HCNR201, the positive and negative terminals of the operational amplifier LM358 and the voltage comparator LM361 are respectively connected to the positive and negative phases of the power supply ;

The signal range received by the DSP is 0-3.3V, and the maximum value of the signal output by the secondary side of the sensor is 5V, which does not match the voltage value received by the DSP, so the signal conversion circuit is designed to achieve voltage conversion of different amplitudes; the signal isolation unit outputs The signal is processed by voltage limiting protection, filtering and amplification circuit and directly input to the analog signal input port ADCINA0 of DSP.

Advantage of the present invention and beneficial effect are:

The online monitoring system for the main parameters of mine motor operation can collect the flow, temperature, torque, rotational speed of the motor and the gas content and humidity information of the working environment, and perform calculation processing and remote transmission. It has high measurement accuracy, good stability, and Strong interference and other advantages, suitable for the harsh environment of coal mines and frequent application of motors, it is of great significance to improve the reliability and stability of mine motors, ensure safe production and the safety of people's lives and property.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 Structural diagram of online monitoring system for main parameters of mine motor operation;

Figure 2 temperature detection circuit.

In the figure: signal isolation unit 1, signal conversion unit 2, DSP3, sound and light alarm unit 4, reset unit 5, display unit 6, interface 7, emulator 8, programming computer 9, communication unit 10, remote monitoring system 11, current Sensor 13, temperature sensor 14, torque sensor 15, speed sensor 16, gas sensor 17, humidity sensor 18, mining motor 19, working environment 20.

detailed description

As shown in Fig. 1-Fig. 2, the present invention is an online monitoring system for the main parameters of mine motor operation. The specific implementation process of the patent will be described in detail below in conjunction with the accompanying drawings.

The monitoring system consists of DSP3, emulator 8, programming computer 9, reset unit 5, display unit 6, current sensor 13, temperature sensor 14, torque sensor 15, speed sensor 16, gas sensor 17, humidity sensor 18, working environment 20, Signal isolation unit 1, signal conversion unit 2, sound and light alarm unit 4, communication unit 10 and remote monitoring system 11 are composed, wherein the programming interface 7 of DSP3 is connected with the output end of emulator 8, and the output end of emulator 8 is connected with programming The output end of computer 9 is connected, the output end of reset unit 5 is connected with the reset interface of DSP3, the input end of display unit 6 is connected with the signal output end of DSP3, the signal input end of current transformer 13 is connected with mining motor 19 The three-phase winding of the current transformer 13 is connected with the input of the signal isolation unit 1, the temperature sensor 14 is fixed on the surface of the mining motor 19, the output of the temperature sensor 14 is connected with the input of the signal isolation unit 1 The torque sensor 15 and the speed sensor 16 are fixed on the main shaft of the motor 19, the output ends of the torque sensor 15 and the speed sensor 16 are connected with the input end of the signal isolation unit 1, the gas sensor 17 and the humidity sensor 18 are fixed on the motor In the working environment 20, the output ends of the gas sensor 17 and the humidity sensor 18 are connected to the input end of the signal isolation unit 1, the output end of the signal isolation unit 1 is connected to the input end of the signal conversion unit 2, and the signal conversion unit 2 The output end is connected with the signal input end of DSP3, the input end of sound and light alarm unit 4 is connected with the signal output end of DSP3, the input end of communication unit 10 is connected with the communication structure line of DSP3, the output end of communication unit 10 is connected with the remote The communication interface of the monitoring system 11 is connected.

Description of the working process of the monitoring system: High-precision sensors: current sensor 13, temperature sensor 14, torque sensor 15, speed sensor 16, gas sensor 17 and humidity sensor 18 collect the current, temperature, torque, speed and working environment of the mining motor 19 in real time The gas content and humidity, through the signal isolation unit 1 and the signal conversion unit 2, become analog signals that can be recognized by the DSP3, and the DSP3 performs calculation processing on the output information of the sensor and compares it with the safety value in the database to obtain the operating status of the motor 19 and working environment 20 indicators, when the motor 19 fails, the gas exceeds the standard and the humidity exceeds the standard, the sound and light alarm unit 4 is used to report to the police. The monitoring system uses the SPI communication interface to send the operating parameters and environmental information of the mining motor to the remote monitoring system 11 in real time.

Temperature rise is an important indicator to measure the operation status of coal mine motors. Real-time monitoring of the temperature of the motor body is an important measure to ensure the safe and reliable operation of coal mine motors. AD590 is a current integrated temperature sensor developed by American AD Company. This device is equivalent to a constant current source when the measured temperature is constant, and outputs a current signal of 1μA/K proportional to the absolute temperature, which has strong linearity. and anti-interference ability. Paste the AD590 temperature sensor on the surface of the coal mine motor. As the temperature of the motor increases, the temperature of the AD590 also increases, and the output current also increases. The current signal is converted into a voltage signal, which is transmitted to the signal through the signal isolation and conversion unit. DSP. The temperature detection circuit is shown in Figure 2, in which the output end of the temperature sensor AD590 is connected to one end of the resistors R1 and R3, the other end of the resistor R1 is connected to the ground through the sliding resistor R2, and the other end of the resistor R3 is connected to the operational amplifier LM358 The positive input terminal is connected, the negative input terminal of the operational amplifier LM358 is connected to its output terminal through the resistor R5, the output terminal of the LM358 is connected to the positive input terminal of the voltage comparator LM361, and the resistor R4 and the sliding resistor R6 are connected in series. Connect with the positive and negative terminals of the power supply, the negative input terminal of the voltage comparator LM361 is connected between the resistor R4 and the sliding resistor R6, the output terminal of the voltage comparator LM361 is connected with the input terminal of the optocoupler HCNR201, and the resistor R7 is respectively connected to the optical coupler The negative power supply terminal of the coupling HCNR201 is connected to the ground phase, the resistor R8 is respectively connected to the positive terminal of the power supply and the output terminal of the optocoupler HCNR201, the positive and negative terminals of the operational amplifier LM358 and the voltage comparator LM361 are respectively connected to the positive and negative phases of the power supply.

The signal range received by DSP is 0-3.3V, while the maximum value of the signal output by the secondary side of the sensor is 5V, which does not match the voltage value received by DSP, so the signal conversion circuit is designed to realize voltage conversion of different amplitudes. In order to improve the safety performance of the circuit and prevent the input signal of the operational amplifier and DSP from being too large and damaging the components, a voltage-limiting diode protection circuit is designed. The signal conversion circuit selects an active filter circuit for filtering to prevent signal interference. The signal output by the signal isolation unit is processed by voltage limiting protection, filtering and amplifying circuit and directly input to the analog signal input port ADCINA0 of DSP.

The online monitoring system for the main parameters of mine motor operation can collect the flow, temperature, torque, rotational speed of the motor and the gas content and humidity information of the working environment, and perform calculation processing and remote transmission. It has high measurement accuracy, good stability, and Strong interference and other advantages, suitable for the harsh environment of coal mines and frequent application of motors, it is of great significance to improve the reliability and stability of mine motors, ensure safe production and the safety of people's lives and property.

Claims (4)

1. The online monitoring system for the main parameters of mine motor operation is characterized by: the programming interface (7) of DSP3 is connected with the output end of the emulator (8), and the output end of the emulator (8) is connected with the programming computer (9) The output terminal of the reset unit (5) is connected with the reset interface of the DSP (3), the input terminal of the display unit (6) is connected with the signal output terminal of the DSP (3), and the current transformer (13 ) is connected to the three-phase winding of the mine motor (19), the output end of the current transformer (13) is connected to the input end of the signal isolation unit (1), and the temperature sensor (14) is fixed on the mine motor (19). On the motor (19), the output end of the temperature sensor (14) is connected to the input end of the signal isolation unit (1), the torque sensor (15) and the rotational speed sensor (16) are connected on the main shaft of the motor (19), and the torque sensor (15) is connected with the output end of the speed sensor (16) and the input end of the signal isolation unit (1), the gas sensor (17) and the humidity sensor (18) are connected in the working environment (20) of the motor, the gas sensor ( 17) The output terminal of the humidity sensor (18) is connected to the input terminal of the signal isolation unit (1), the output terminal of the signal isolation unit (1) is connected to the input terminal of the signal conversion unit (2), and the signal conversion unit ( The output terminal of 2) is connected with the signal input terminal of DSP (3), the input terminal of the sound and light alarm unit (4) is connected with the signal output terminal of DSP (3), and the input terminal of communication unit (10) is connected with the DSP ( 3) The communication structure line is connected, and the output terminal of the communication unit (10) is connected with the communication interface of the remote monitoring system (11). 2. The online monitoring system for the main parameters of mine motor operation according to claim 1, characterized in that: the current sensor (13), temperature sensor (14), torque sensor (15), speed sensor (16), The gas sensor (17) and the humidity sensor (18) collect the current, temperature, torque, speed of the mine motor (19) and the gas content and humidity of the working environment in real time, and pass through the signal isolation unit (1) and the signal conversion unit (2) become an analog signal that can be recognized by the DSP (3), and the DSP (3) performs calculation processing on the output information of the sensor and compares it with the safety value in the database to obtain the operating status of the motor (19) and the index of the working environment (20), When the motor (19) fails, the gas exceeds the standard and the humidity exceeds the standard, the sound and light alarm unit (4) gives an alarm; the monitoring system uses the SPI communication interface to send the operating parameters and environmental information of the mining motor to the remote monitoring system (11) in real time. 3. The on-line monitoring system for the main parameters of mine motor operation according to claim 1, characterized in that: said temperature sensor (14) is an AD590 current type integrated temperature sensor developed by AD Company in the United States. At a certain time, it is equivalent to a constant current source, outputting a current signal of 1μA/K proportional to the absolute temperature, which has strong linearity and anti-interference ability; paste the AD590 temperature sensor on the surface of the coal mine motor, as the temperature of the motor rises, , AD590 temperature also increases, and the output current also increases, and the current signal is converted into a voltage signal, which is transmitted to the DSP through the signal isolation and conversion unit. 4. The online monitoring system for the main parameters of mine motor operation according to claim 3, characterized in that: the temperature detection circuit of the temperature sensor (14) is: the output end of the temperature sensor AD590 and one end of the resistors R1 and R3 The other end of the resistor R1 is connected to the ground through the sliding resistor R2, the other end of the resistor R3 is connected to the positive input terminal of the operational amplifier LM358, and the negative input terminal of the operational amplifier LM358 is connected to its output terminal through the resistor R5. The output terminal of the LM358 is connected to the positive input terminal of the voltage comparator LM361, and the resistor R4 and the sliding resistor R6 are connected in series to the positive and negative terminals of the power supply respectively, and the negative input terminal of the voltage comparator LM361 is connected to the resistor R4 and the sliding resistor R6. Between the resistors R6, the output terminal of the voltage comparator LM361 is connected to the input terminal of the optocoupler HCNR201, the resistor R7 is respectively connected to the negative terminal of the power supply of the optocoupler HCNR201 and the ground, and the resistor R8 is respectively connected to the positive terminal of the power supply and the input terminal of the optocoupler HCNR201 The output terminals are connected, and the positive and negative terminals of the operational amplifier LM358 and the voltage comparator LM361 are respectively connected to the positive and negative terminals of the power supply; The signal range received by the DSP is 0-3.3V, and the maximum value of the signal output by the secondary side of the sensor is 5V, which does not match the voltage value received by the DSP, so the signal conversion circuit is designed to achieve voltage conversion of different amplitudes; the signal isolation unit outputs The signal is processed by voltage limiting protection, filtering and amplification circuit and directly input to the analog signal input port ADCINA0 of DSP.