CN102311023A - A given method for additional starting torque of mine hoist with on-line detection of load - Google Patents

Abstract

An additional starting torque setting method for a mine hoist for detecting load on line comprises the following steps: firstly, the tension sensor measures the tension of the steel wire rope to detect the load weight in real time, the transmitting device transmits out the modulated signal in a wireless mode, and the receiving device converts the wireless signal into the wireless signal and transmits the wireless signal to the single chip microcomputer. Then, the singlechip calculates the digital weight signal to obtain an additional starting torque signal to be superposed, and the additional starting torque signal is sent to the upper computer through a serial bus; and finally, the upper computer integrates the starting torque signal and the additional starting torque signal, sets a superposed current signal corresponding to a plurality of superposed torques, judges whether the mechanical brake is disconnected, and outputs the superposed current signal to the motor of the controller if the mechanical brake is disconnected, so as to ensure the starting of the motor. The invention can simultaneously meet the starting requirements of the hoister under heavy load, light load or no load, avoids the phenomenon of inversion when the hoister is started, and improves the safety of coal mine production.

Description

A given method for additional starting torque of mine hoist with on-line detection of load

technical field

The invention relates to a method for setting the additional starting torque of a mine hoist, in particular to a method for setting the additional starting torque of a mine hoist for online load detection.

Background technique

In mine production using vertical shaft hoisting, the operating status of the hoist is directly related to the safe production of the mine. At present, most vertical shaft hoists use double skips for lifting. When it is empty, it can be considered that the resistance moment of the hoist is approximately zero. When it is loaded, the resistance moment of the hoist is generated by the weight of the lifted goods. When the mechanical brake is released and the hoist starts, the weight of the hoisted cargo is immediately borne by the starting torque generated by the motor, that is, a step load is given to the motor. If the lifting starting torque provided by the motor is less than the resistance torque of the lifting system during the period when the motor establishes the additional starting torque for lifting, the hoist will move downward under the drag of the heavy object, and a reverse phenomenon will occur. The phenomenon intensifies and the duration becomes longer, until the hoist is stationary when the two are balanced, then the hoist accelerates forward, and the hoist system enters the forward acceleration stage. This reversal phenomenon is very unfavorable to mine safety production.

At present, double closed-loop control is commonly used for starting and stopping of electric motors. Due to the delay link of the current loop and the speed loop, the hoist will inevitably be reversed. When it is released, the starting torque of the motor is greater than the resistance torque of the weight to avoid inversion. However, in practical applications, this method cannot meet the requirements for the control characteristics of the hoisting system when it is unloaded or lightly loaded.

Contents of the invention

The purpose of the present invention is to provide a mine hoist additional starting torque setting method for on-line load detection to solve the technical problem in the prior art that the mine hoist hoisting system starts the hoist reversal with no load or light load.

Another object of the present invention is to provide an additional starting torque setting system for a mine hoist with online load detection to solve the technical problem in the prior art that the hoisting system of a mine hoist starts the hoist reversal with no load or light load.

In order to achieve the above object, the present invention provides a mine hoist additional starting torque setting method for online detection of load, including the following steps:

(1) The tension sensor measures the tension of the wire rope to detect the load weight in real time, and transmits the detected value to the sending device;

(2) The transmitting device receives the detected value, performs amplification and modulation processing on the detected value, and sends the modulated signal through wireless mode;

(3) The receiving device receives the wireless signal sent by the sending device, converts the wireless signal into a voltage signal, obtains a digital weight signal, and sends the digital weight signal to the single-chip microcomputer.

(4) The single-chip microcomputer receives the digital weight signal, compares the digital weight signal with the pre-stored standard load value, judges the additional stage in which the hoist is located, and performs calculations on the digital weight signal according to the additional stage obtained by judging, and obtains the weight that needs to be superimposed Additional starting torque signal, and then send the additional starting torque signal to the host computer via the serial bus;

(5) The upper computer integrates the starting torque signal and the additional starting torque signal, and sets the superimposed current signal corresponding to the superimposed torque;

(6) The host computer monitors in real time to determine whether the mechanical brake is disconnected, and if the mechanical brake is disconnected, perform step (7); otherwise, return to step (1);

(7) The host computer outputs a superimposed current signal to the controller motor to ensure the motor starts.

According to a method for setting the additional starting torque of a mine hoist with on-line load detection described in a preferred embodiment of the present invention, the additional stage specifically includes no additional stage, small additional stage and full additional stage. The starting requirements under light conditions; the small additional stage is suitable for the requirements under normal load conditions; the full additional stage is suitable for the starting requirements under overload or emergency conditions.

According to a preferred embodiment of the present invention, a method for setting the additional starting torque of a mine hoist with online load detection, before step (1), it also includes: presetting the upper limit and lower limit of the hoist load weight, if the load weight is less than the weight If the load is between the lower limit and the upper limit, it is in the stage of small addition; if the load is greater than the upper limit, it is in the stage of full addition.

The present invention also provides an additional starting torque setting system for a mine hoist with online load detection, including:

The tension sensor is installed above the skip of the mine hoist to measure the tension of the wire rope to monitor the load weight value in real time and transmit the detected value to the sending device;

The sending device is connected with the tension sensor to amplify and modulate the received detection value, and send the modulated signal wirelessly;

The receiving device is connected with the sending device to convert the wireless signal into a voltage signal, obtain a digital weight signal, and send the digital weight signal to the single-chip microcomputer;

The single-chip microcomputer is connected with the receiving device to compare the digital weight signal with the pre-stored standard load value, judge the additional stage of the hoist, and perform calculations on the digital weight signal according to the additional stage obtained by judging to obtain the weight that needs to be superimposed. Additional starting torque signal, and then send the additional starting torque signal to the host computer via the serial bus;

The upper computer is connected with the single-chip microcomputer, which is used to synthesize the starting torque signal and the additional starting torque signal, and set the superimposed current signal corresponding to the superimposed torque; and judge whether the mechanical brake is disconnected according to real-time monitoring. If the mechanical brake is disconnected, then Output the superimposed current signal to the controller motor to ensure the motor starts.

According to a preferred embodiment of the present invention, a mine hoist additional starting torque setting system for online load detection, the sending device further includes:

The first conditioning circuit includes a two-stage first voltage conditioning circuit, which is used to condition the detection value of the tension sensor so that it has a certain driving capability;

The wireless transmitting module is connected with the conditioning circuit, and is used for amplifying the detected value and performing modulation processing, and transmitting the modulated signal.

According to a preferred embodiment of the present invention, a mine hoist additional starting torque setting system for online load detection, the receiving device further includes:

The wireless receiving module is used to receive the signal sent by the wireless transmitting module, demodulate and restore the received signal and send it to the second voltage conditioning circuit;

The second voltage conditioning circuit is connected with the wireless receiving module to condition the signal to a voltage signal suitable for the A/D conversion circuit;

The A/D conversion circuit is connected with the second voltage conditioning circuit, and is used for converting the voltage signal into a digital weight signal.

According to a preferred embodiment of the present invention, a mine hoist additional starting torque setting system for online load detection, the single-chip microcomputer further includes:

The data storage module is used to store the preset upper limit and lower limit of the load capacity of the hoist;

The additional stage judging module is used to compare the digital weight signal with the upper limit and lower limit of the load capacity of the hoist, and judge the additional stage of the hoist;

The additional starting torque calculation module is used to calculate the digital weight signal according to the judgment result of the additional stage judgment module to obtain the additional starting torque signal that needs to be superimposed;

The signal sending module is used to send the additional starting torque signal to the host computer through the serial bus.

The invention obtains the lifting load weight through the online load measuring device, and obtains the additional starting torque signal through the calculation of the single-chip computer, which solves the delay problem of the current loop and the rotation speed in the double closed-loop control. Compared with the existing differential feedforward advanced compensation method, the present invention The method can calculate the required starting torque in real time through the program in the single chip computer, so it can meet the starting requirements of the hoist under heavy load, light load or no load at the same time, avoid the reverse phenomenon of the hoist when starting, and improve the safety of coal mine production.

Description of drawings

Fig. 1 is the method flowchart of the mine hoist additional starting torque given method of on-line detection load of the present invention;

Fig. 2 is a schematic diagram of the application of the mine hoist additional starting torque given system for on-line load detection according to the present invention.

FIG. 3 is a schematic structural diagram of a sending device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a receiving device according to an embodiment of the present invention.

FIG. 5 is a structural principle diagram of a single-chip microcomputer according to an embodiment of the present invention.

Detailed ways

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

The following examples are implemented on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are provided, but the protection scope of the present invention is not limited to the following examples.

Please refer to Figure 1, a mine hoist additional starting torque given method for online load detection, including the following steps:

S11: The tension sensor measures the tension of the wire rope to detect the load weight in real time, and transmits the detected value to the sending device;

S12: The sending device receives the detected value, performs amplification and modulation processing on the detected value, and sends the modulated signal wirelessly;

S13: The receiving device receives the wireless signal sent by the sending device, converts the wireless signal into a voltage signal, obtains a digital weight signal, and sends the digital weight signal to the single-chip microcomputer.

S14: The single-chip microcomputer receives the digital weight signal, compares the digital weight signal with the pre-stored standard load value, judges the additional stage of the hoist, and calculates the digital weight signal according to the additional stage obtained by judging to obtain the additional value that needs to be superimposed Start the torque signal, and then send the additional starting torque signal to the host computer via the serial bus;

S15: The upper computer integrates the starting torque signal and the additional starting torque signal, and sets the superimposed current signal corresponding to the superimposed torque;

S16: The upper computer monitors in real time to determine whether the mechanical brake is disconnected. If the mechanical brake is disconnected, execute step S17; otherwise, return to step S11;

S17: The upper computer outputs a superimposed current signal to the controller motor to ensure that the motor starts.

In the above method, the additional stage specifically includes no additional stage, small additional stage and full additional stage. The no additional stage is suitable for the start-up requirements under light load conditions; the small additional stage is applicable to the requirements under normal load conditions; the full additional stage Stages are suitable for start-up requirements in overload or emergency situations.

In addition, in the method of the present invention, before step (1), it also includes: presetting the upper limit and the lower limit of the load capacity of the hoist. In between, it is in the small additional stage; if the load weight is greater than the weight limit, it is in the full additional stage.

The non-additional stage is suitable for light loads, and the torque generated by the motor can be started without reverse; the small additional stage is suitable for general loads, that is, when the hoist is fully loaded, it can meet the requirements by superimposing the current; large The additional stage is suitable when the hoist is too heavy or when a high torque is required in an emergency. These values can be set in the single-chip microcomputer. After the hoist is started, the superimposed current can be gradually reduced until the superimposed amount is zero, and the motor runs normally.

Please refer to Fig. 2 to Fig. 5 at the same time, the present invention also provides a mine hoist additional starting torque setting system for online load detection, including: a tension sensor 10, a sending device 11, a receiving device 12, a single-chip microcomputer 13 and a host computer 14.

The tension sensor 10 is installed above the skip 20, and measures the tension of the steel wire rope 30 to detect the load weight in real time, and transmits the detected value to the sending device 11; the sending device 11 sends the signal by wireless; Receive the signal, and send the signal to the single-chip microcomputer 13 after being decoded and processed. The single-chip microcomputer 13 performs calculations according to the received digital weight signal to obtain an additional starting torque signal that needs to be superimposed, and then sends it to the host computer 14 via the serial bus. The upper computer synthesizes the starting torque signal and the additional starting torque signal, and sends the current signal corresponding to the superimposed torque to the motor drive part.

The sending device 11 is used to amplify and modulate the received detection value, and send the modulated signal wirelessly, which further includes:

The first conditioning circuit 111 includes a two-stage first voltage conditioning circuit 112, which is used to condition the detection value of the tension sensor 10 so that it has a certain driving capability;

The wireless transmitting module 113 is connected with the conditioning circuit 111, and is used for amplifying the detected value and performing modulation processing, and transmitting the modulated signal.

The receiving device 12 is connected with the sending device 11 to convert the wireless signal into a voltage signal to obtain a digital weight signal, and send the digital weight signal to the single-chip microcomputer 13, which further includes:

The wireless receiving module 121 is used to receive the signal sent by the wireless transmitting module 113, demodulate and restore the received signal and send it to the second voltage conditioning circuit 122;

The second voltage conditioning circuit 122 is connected to the wireless receiving module 121 to condition the signal to a voltage signal suitable for the A/D conversion circuit 123;

The A/D conversion circuit 123 is connected with the second voltage conditioning circuit 122 for converting the voltage signal into a digital weight signal.

The single-chip microcomputer 13 is connected with the receiving device 12 to compare the digital weight signal with the pre-stored standard load value, judge the additional stage in which the hoist is located, and perform calculations on the digital weight signal according to the additional stage obtained by judging to obtain the required superposition The additional starting torque signal, then the additional starting torque signal is sent to the host computer 14 via the serial bus, which further includes:

The data storage module 131 is used to store the preset upper limit and lower limit of the load capacity of the hoist;

The additional stage judging module 132 is used to compare the digital weight signal with the upper limit and the lower limit of the load weight of the hoist to judge the additional stage of the hoist;

The additional starting torque calculation module 133 is used to calculate the digital weight signal according to the judgment result of the additional stage judgment module to obtain the additional starting torque signal that needs to be superimposed;

The signal sending module 134 is used for sending the additional starting torque signal to the host computer 14 through the serial bus.

The control of the single-chip microcomputer 13 is divided into three stages: no additional stage, small additional stage and full additional stage. The non-additional stage is suitable for light loads, and the torque generated by the motor can be started without reverse; the small additional stage is suitable for general loads, that is, when the hoist is fully loaded, it can meet the requirements by superimposing the current; large The additional stage is suitable when the hoist is too heavy or when a high torque is required in an emergency. In the above embodiments of the present invention, the value of the additional starting torque is calculated in real time, and it can also be pre-set in the single-chip microcomputer. After the hoist is started, the superimposed current can be gradually reduced until the superimposed amount is zero. The motor runs normally, and the speed at which the superimposition decreases can be determined according to the actual situation.

The upper computer 14 is connected with the single-chip microcomputer 13, in order to synthesize the starting torque signal and the additional starting torque signal, and set the superimposed current signal corresponding to the superimposed torque; and according to the real-time monitoring, judge whether the mechanical brake is disconnected, if the mechanical brake is disconnected, Then output the superimposed current signal to the controller motor to ensure the motor starts.

The invention obtains the lifting load weight through the online load measuring device, and obtains the additional starting torque signal through the calculation of the single-chip computer, which solves the delay problem of the current loop and the rotation speed in the double closed-loop control. Compared with the existing differential feedforward advanced compensation method, the present invention The method can calculate the required starting torque in real time through the program in the single chip computer, so it can meet the starting requirements of the hoist under heavy load, light load or no load at the same time, avoid the reverse phenomenon of the hoist when starting, and improve the safety of coal mine production.

The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes conceivable by those skilled in the art should fall within the protection scope of the present invention.

Claims (7)

1. A mine hoist additional starting torque given method for on-line detection load, is characterized in that, comprises the following steps: (1) The tension sensor measures the tension of the wire rope to detect the load weight in real time, and transmits the detected value to the sending device; (2) The transmitting device receives the detected value, performs amplification and modulation processing on the detected value, and sends the modulated signal through wireless mode; (3) The receiving device receives the wireless signal sent by the sending device, converts the wireless signal into a voltage signal, obtains a digital weight signal, and sends the digital weight signal to the single-chip microcomputer. (4) The single-chip microcomputer receives the digital weight signal, compares the digital weight signal with the pre-stored standard load value, judges the additional stage where the hoist is located, and calculates the digital weight signal according to the additional stage obtained by judging to obtain the required The superimposed additional starting torque signal, and then send the additional starting torque signal to the host computer via the serial bus; (5) The upper computer integrates the starting torque signal and the additional starting torque signal, and sets the superimposed current signal corresponding to the superimposed torque; (6) The host computer monitors in real time to determine whether the mechanical brake is disconnected, and if the mechanical brake is disconnected, perform step (7); otherwise, return to step (1); (7) The host computer outputs a superimposed current signal to the controller motor to ensure the motor starts. 2. A kind of mine hoist additional start-up torque setting method for on-line detection of load as claimed in claim 1, characterized in that, said additional stage specifically includes no additional stage, small additional stage and full additional stage, said non-additional stage The additional stage is suitable for starting requirements under light load conditions; the small additional stage is suitable for requirements under normal load conditions; and the full additional stage is suitable for starting requirements under overload or emergency conditions. 3. A method for setting the additional starting torque of a mine hoist with online load detection as claimed in claim 1, characterized in that before step (1), it also includes: presetting the upper limit and lower limit of the load of the hoist, if the load If the weight is less than the lower weight limit, it is in the no-addition stage; if the load is between the lower weight limit and the upper weight limit, it is in the small-addition stage; if the load is greater than the upper limit, it is in the full-addition stage. 4. A mine hoist additional starting torque given system for online load detection, characterized in that it includes: The tension sensor is installed above the skip of the mine hoist to measure the tension of the wire rope to monitor the load weight value in real time and transmit the detected value to the sending device; A sending device, connected to the tension sensor, is used to amplify and modulate the received detection value, and send the modulated signal wirelessly; The receiving device is connected with the sending device, and is used to convert the wireless signal into a voltage signal to obtain a digital weight signal, and send the digital weight signal to the single-chip microcomputer; The single-chip microcomputer is connected with the receiving device, and is used to compare the digital weight signal with the pre-stored standard load value, judge the additional stage where the hoist is in, and calculate the digital weight signal according to the additional stage obtained by judging to obtain the required The superimposed additional starting torque signal, and then send the additional starting torque signal to the host computer via the serial bus; The upper computer is connected with the single-chip microcomputer to synthesize the starting torque signal and the additional starting torque signal, and set the superimposed current signal corresponding to the superimposed torque; and judge whether the mechanical brake is disconnected according to real-time monitoring, if the mechanical brake is disconnected , then output a superimposed current signal to the controller motor to ensure that the motor starts. 5. A kind of mine hoist additional start-up torque given system of online detection load as claimed in claim 4, is characterized in that, described sending device further comprises: The first conditioning circuit includes a two-stage first voltage conditioning circuit, which is used to condition the detection value of the tension sensor so that it has a certain driving capability; The wireless transmitting module is connected with the conditioning circuit, and is used for amplifying the detected value and performing modulation processing, and transmitting the modulated signal. 6. A mine hoist additional starting torque setting system for online load detection as claimed in claim 4, wherein said receiving device further comprises: The wireless receiving module is used to receive the signal sent by the wireless transmitting module, demodulate and restore the received signal and send it to the second voltage conditioning circuit; A second voltage conditioning circuit, connected to the wireless receiving module, for conditioning the signal to a voltage signal suitable for the A/D conversion circuit; The A/D conversion circuit is connected with the second voltage conditioning circuit, and is used to convert the voltage signal into a digital weight signal. 7. A kind of mine hoist additional start-up torque given system of online detection load as claimed in claim 4, is characterized in that, described single-chip microcomputer further comprises: The data storage module is used to store the preset upper limit and lower limit of the load capacity of the hoist; The additional stage judging module is used to compare the digital weight signal with the upper limit and lower limit of the load capacity of the hoist, and judge the additional stage of the hoist; The additional starting torque calculation module is used to calculate the digital weight signal according to the judgment result of the additional stage judgment module to obtain the additional starting torque signal that needs to be superimposed; The signal sending module is used to send the additional starting torque signal to the host computer through the serial bus.

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