CN103170403B - Data acquisition monitoring module and method for ball grinder group monitoring system - Google Patents

Abstract

The invention belongs to the technical field of equipment operation monitoring in large mining enterprises, and in particular relates to a data collection and monitoring module of a ball mill group monitoring system and a monitoring method thereof. The data collection and monitoring module of the ball mill group monitoring system is characterized in that it includes a data monitoring center, a data transmission device, a ball mill group monitoring module, and a network power metering module. Based on this data collection and monitoring module, the ball mill group is collected, monitored, and transmitted. Realize the monitoring of ball mill groups in multiple large-scale mining enterprises, which can save the expansion of basic equipment, and can complete comprehensive tasks such as massive data storage, optimization processing, intelligent decision-making, reasonable scheduling, and comprehensive monitoring in real time.

Description

Data acquisition and monitoring module and monitoring method of ball mill group monitoring system

technical field

The invention belongs to the technical field of equipment operation monitoring in large mining enterprises, and in particular relates to a data collection and monitoring module of a ball mill group monitoring system and a monitoring method thereof.

Background technique

Ball mills are commonly used equipment in mine production. In recent years, with the expansion of mine scale, when mining large-scale and low-grade ore deposits, how to shorten the factory process configuration and improve processing capacity has become a challenge to the large-scale, Energy saving and availability put forward urgent requirements. In order to make the large ball mill work continuously and trouble-free, it is necessary to monitor the important parts of the ball mill or important technical parameters, such as pressure, particle size of the material to be ground, temperature, flow, liquid level, vibration and electricity, etc. in real time.

Most of the existing large-scale mining enterprises use analog transmitters for data collection in the monitoring technology of the ball mill groups in their mines. 1) This data acquisition technology is a parameter corresponding to a set of transmitters, and its acquisition equipment is complex and has many connections. When the collection distance is long, it is extremely susceptible to interference, and the cost is high and the reliability is low. 2) The analog transmitter is used for data collection, and sometimes it can only be displayed as a pointer table. Individual data can be sent to PLC (Programmable Logic Controller) for quantitative processing. The equipment costs are high, and professional engineers and technicians are required to write complicated special programs. 3) When the analog transmitter is used for data acquisition and data processing, it needs to be equipped with more computers and conversion devices, and the equipment cost is also very high.

Contents of the invention

The purpose of the present invention is to provide a data collection and monitoring module of a ball mill group monitoring system and its monitoring method, which can realize the monitoring of ball mill groups in multiple large-scale mining enterprises, can save the expansion of basic equipment, and can complete a large amount of data storage in real time, Comprehensive work such as optimized processing, intelligent decision-making, reasonable scheduling, and comprehensive monitoring.

The purpose of the present invention is achieved through the following technical solutions:

The data acquisition and monitoring module of the ball mill group monitoring system of the present invention is characterized in that it includes a data monitoring center, a data transmission device, a ball mill group monitoring module, a network power metering module,

The data monitoring center includes an industrial computer, a data display screen connected to the industrial computer,

The data transmission device includes power optical fiber or GPRS wireless communication,

The ball mill group monitoring module is composed of a group of ball mill unit monitoring modules, the ball mill unit monitoring module includes a sensor arranged on the ball mill, a network signal acquisition module connected to the sensor,

The network electricity metering module includes a group of network electricity metering device controllers, and a group of power consumption systems respectively connected to the network electricity metering device controllers. This group of power consumption systems is powered by the grid, and the network electricity metering Metering device controller includes current sensor CT, voltage sensor PT, ASLC-special chip for power measurement, keyboard, LCD display, RS485 interface, watchdog, alarm, clock circuit, DS18B20 temperature measuring element, switch input signal with photoelectric isolation terminal, switch output signal terminal with photoelectric isolation, constant current output current source with photoelectric isolation,

The network signal acquisition module and the controller of the network power metering device are respectively connected to the power optical fiber or GPRS wireless communication, and the power optical fiber or GPRS wireless communication is connected to the industrial computer,

The sensors on the ball mill include temperature sensors, pressure sensors, vibration sensors, particle size sensors, flow sensors, electric quantity sensors and liquid level sensors located on the ball mill,

The network signal acquisition module includes a signal access unit, a signal conversion unit, an isolation amplification unit, an embedded microcomputer,

The signal access unit includes "eight select one" chips UIN1, UIN2 and UIN3, strobe signal QH, D ₂ , D ₁ and D ₀ control signals, the output terminal A ₁ connected with the chip UIN1, and The output terminal _A2 connected to the chip UIN2 is connected to the output terminal _A3 connected to the chip UIN3, the chip UIN1 is provided with input terminals IN11-IN18, and the chip UIN2 is provided with input terminals IN21-IN28 , the UIN3 is provided with input terminals IN31-IN38, and the output terminals _A1 , _A2 and _A3 are connected to the signal conversion unit,

The signal conversion unit includes a reference voltage source Vout, resistors R1-R11, electronic switches S1-S7, a latch SC, a latch strobe signal BX, impedance converters GS1-GS6, variable resistors W1, D _2. D ₁ and D ₀ control signals, signal conversion output terminals B1, B2 and B3, the signal conversion output terminals B1, B2 and B3 are connected to the isolation amplification unit,

The isolation amplifying unit includes an isolation unit _U1 , a programmable gain amplifier circuit, and the isolation unit _U1 includes conversion capacitors C1 and C2, microelectronic digital single-pole double-throw switches KC11, KC12, KC21 and KC22, and a gate signal GL, the control signal D0 of the microelectronic digital switch, the programmable gain amplifier circuit includes a precision integrated operational amplifier U2, a programmable resistor network U3, and a gain measurement circuit U4, and the programmable resistor network U3 is controlled by a digital potentiometer SD1 , composed of SD2 and SD3, the gain measurement circuit U4 includes digital switches K1, K2, standard voltage Vb, control signal D1 of the digital switch,

The embedded microcomputer includes A/D converter, reference voltage source, DSP controller, memory, network interface, USB interface, DS18B20 one-line bus type digital temperature transmitter,

The embedded microcomputer is connected with the electric optical fiber or GPRS wireless communication.

The monitoring method based on the data acquisition monitoring module of the ball mill group monitoring system is characterized in that: it comprises the following steps:

A. Set a group of sensors, temperature sensors, pressure sensors, vibration sensors, particle size sensors, flow sensors, power sensors and liquid level sensors on the ball mill and ball mill hydrostatic bearings according to different monitoring targets to measure temperature, pressure, and vibration , particle size, flow rate, electricity and liquid level, the sensor output signal is obtained through the sensor;

B. The sensor output signal enters the network signal acquisition module, and feeds into the IN11~IN38 signal input terminals of the signal access unit, and simultaneously inputs the QH strobe signal, D ₂ , D ₁ and D ₀ control signals to the signal access unit, and the The sensor output signal is converted into a standard voltage signal I and output through the output terminals A ₁ , A ₂ and A ₃ , and the QH strobe signal is in the strobe state when it is low level; the signal access unit includes the "eight select one" chip UIN1 , UIN2 and UIN3, strobe signal QH, D ₂ , D ₁ and D ₀ control signals, the output terminal A ₁ connected with the chip UIN1, the output terminal A ₂ connected with the chip UIN2, and the The chip UIN3 is connected to the output terminal _A3 , the chip UIN1 is provided with input terminals IN11-IN18, the chip UIN2 is provided with input terminals IN21-IN28, and the chip UIN3 is provided with input terminals IN31-IN38. The above-mentioned output terminals A ₁ , A ₂ and A ₃ are connected to the signal conversion unit;

The standard voltage signal Ⅰ output through the output terminals A ₁ , A ₂ and A ₃ is sent to the signal conversion unit, and at the same time, the Vout reference voltage source, D ₂ , D ₁ and D ₀ control signals are input to the signal conversion unit, and the standard voltage signal Ⅰ Converted into a standard voltage signal II and output through the signal conversion output terminals _B1 , _B2 and B3, Vout=2.5V is selected during implementation, and the voltage ripple is ≤0.5%; the signal conversion unit includes a reference voltage source Vout, a resistor R1～ R11, electronic switch S1～S7, latch SC, latch strobe signal BX, impedance converter GS1～GS6, variable resistor W1, D ₂ , D ₁ and D ₀ control signals, signal conversion output terminal B1 , B2 and B3, the signal conversion output terminals B1, B2 and B3 are connected with the isolation amplification unit;

In order to amplify the signal without interference, the standard voltage signal II is given to the isolation amplifier unit, and at the same time, the GL gating signal is input to the isolation amplifier unit, and the isolation control signals D ₀ and D ₁ are selected and controlled by the embedded microcomputer. Transform the standard voltage signal II into an amplified analog signal. When the GL strobe signal is low, it is in the strobe state; the amplified analog signal enters the embedded microcomputer for A/D conversion, converts the analog signal into a digital signal, and the digital signal passes through the digital signal. After processing by the processor DSP, it can be stored or transmitted to the power optical fiber and GPRS wireless communication;

C. The network power metering module collects the ball mill and ball mill hydrostatic bearing power, and completes the measurement, processing, storage and transmission of various power quantities;

D. The data collected by the network signal acquisition module and the data collected by the network power metering module enter the data monitoring center of the data acquisition and monitoring module through power optical fiber or GPRS wireless communication, and are sent to the industrial computer of the data monitoring center. The data display screen connected to the machine phase displays data for scheduling by the dispatching management department;

Advantages of the present invention:

(1) The ball mill unit monitoring module of the ball mill group monitoring system of the present invention adopts a multi-channel, network intelligent data acquisition modular device directly input by various sensors, which can be directly input by 8 channels in time sharing, unified transformation, capacitance isolation, Programmable amplification, ±18-bit A/D conversion and intelligent processing, network transmission with field bus (Mdobos and Plofibos-DP available at the same time). The ball mill group monitoring module is small in size, flexible in use, easy to operate, strong in versatility, and intelligent in network;

(2) The ball mill unit monitoring module of the ball mill group monitoring system of the present invention can realize real-time, all-round and multi-parameter monitoring of pressure, particle size of ground material, temperature, flow rate, liquid level, vibration, electricity and on-site operation. The data collection and monitoring module of the monitoring system of the present invention can be applied to various occasions such as detection and control, and is an ideal device for network intelligent data monitoring and control;

(3) With the support of the intelligent cloud computing platform, the present invention can realize the monitoring of ball mill groups of large-scale multiple mining enterprises, save the expansion of basic equipment, and can complete a large amount of data storage, optimization processing, intelligent decision-making, reasonable scheduling, Comprehensive monitoring and other comprehensive work.

Description of drawings

Fig. 1 is a schematic diagram of the data acquisition and monitoring module of the present invention.

Fig. 2 is a block diagram of the ball mill system of the present invention.

Fig. 3 is a structural schematic diagram of the ball mill of the present invention.

Fig. 4 is a schematic diagram of the hydrostatic bearing hydraulic system of the present invention.

Fig. 5 is a schematic diagram of the network signal acquisition module of the present invention.

Fig. 6 is a composition diagram of the signal access unit of the present invention.

Fig. 7 is a composition diagram of the signal conversion unit of the present invention.

Fig. 8 is a composition diagram of the isolation amplification unit of the present invention.

Fig. 9 is a composition diagram of the embedded microcomputer of the present invention.

Fig. 10 is a schematic diagram of the network electricity metering module of the present invention.

Fig. 11 is a composition diagram of the controller of the network electricity metering device of the present invention.

Detailed ways

The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

The data collection and monitoring module of the present invention is an important part of the ball mill group monitoring system, and can be used as a ball mill group monitoring system of a subsidiary company of a large mining enterprise.

The data acquisition and monitoring module of a ball mill group monitoring system of the present invention is characterized in that it includes a data monitoring center, a data transmission device, a ball mill group monitoring module, a network power metering module,

The data monitoring center includes an industrial computer, a data display screen connected to the industrial computer,

The data transmission device includes power optical fiber or GPRS wireless communication,

The ball mill group monitoring module is composed of a group of ball mill unit monitoring modules, the ball mill unit monitoring module includes a sensor arranged on the ball mill, a network signal acquisition module connected to the sensor,

The network power metering module as shown in Figures 10 and 11 includes a group of network power metering device controllers, a group of power consumption systems connected to the network power metering device controllers, and this group of power consumption systems is controlled by the power grid. Power supply, the controller of the network power metering device includes a current sensor CT, a voltage sensor PT, an ASLC-special chip for power measurement, a keyboard, an LCD display, an RS485 interface, a watchdog, an alarm, a clock circuit, a DS18B20 temperature measuring element, and a Optically isolated digital input signal terminal, optically isolated digital output signal terminal, constant current output current source with optical isolation,

The network signal acquisition module and the controller of the network power metering device are respectively connected to the power optical fiber or GPRS wireless communication, and the power optical fiber or GPRS wireless communication is connected to the industrial computer,

The ball mill group can include multiple ball mill systems, and a ball mill system is composed of ball mills and hydrostatic bearings. Figure 2 shows the composition of the ball mill system. The sensors on the ball mill include temperature sensors, pressure sensors, vibration sensors, particle size sensors, flow sensors, electric quantity sensors and liquid level sensors arranged on the ball mill. Figure 3 and Figure 4 respectively show the structure of the ball mill and the principle of the hydrostatic bearing hydraulic system. As shown in Figure 3, the motor 8 drives the transmission gear 4 to drive the ball mill to work, and the discharge port 1 and the feed port 6 of the ball mill should be tested for flow rate; the discharge port 1 should be tested for the particle size of the slurry; Drum 3, feed port static pressure bearing 5, feed port 6, reducer 7 and motor 8 shall be subjected to vibration and temperature detection; The main bearing bush is connected to detect the oil supply pressure of the bearing bush, and the oil temperature and liquid level in the oil tank should be tested.

The network signal acquisition module as shown in Figure 5 includes a signal access unit, a signal conversion unit, an isolation amplification unit, an embedded microcomputer,

As shown in Figure 6, the signal access unit includes "eight select one" chips UIN1, UIN2 and UIN3, strobe signal QH, D ₂ , D ₁ and D ₀ control signals, the output terminal connected with the chip UIN1 A ₁ , output terminal A ₂ connected to the chip UIN2, output terminal A ₃ connected to the chip UIN3, the chip UIN1 is provided with input terminals IN11-IN18, and the chip UIN2 is provided with input terminals terminals IN21-IN28, the UIN3 is provided with input terminals IN31-IN38, and the output terminals _A1 , _A2 and _A3 are connected to the signal conversion unit, and the signals are input into IN11-IN18 according to predetermined settings, IN21～IN28, IN31～IN38 input terminals, and according to the strobe state given command in Table 1, the standard voltage signal I is output through A ₁ , A ₂ and A ₃ terminals.

Table 1 Signal access unit signal strobe status table (QH strobe signal is 0)

The signal conversion unit shown in Figure 7 includes a reference voltage source Vout, resistors R1~R11, electronic switches S1~S7, a latch SC, a latch strobe signal BX, impedance converters GS1~GS6, variable resistors W1, _D2 , _D1 and _D0 control signals, signal conversion output terminals B1, B2 and B3, and the signal conversion output terminals B1, B2 and B3 are connected to the isolation amplification unit. The standard voltage signal Ⅰ output through A ₁ , A ₂ and A ₃ is sent to the signal conversion unit, and at the same time, the Vout reference voltage source and D ₂ , D ₁ and D ₀ control signals are input to the signal conversion unit to convert the standard voltage signal Ⅰ The standard voltage signal II is output through terminals _B1 , _B2 and B3, Vout=2.5V is selected during implementation, and the voltage ripple is ≤0.5%; the state of S1～S7 is determined by the state of D2, D1 and D0, see Table 2; W1 They are variable resistors, which are used to adjust the output value; GS1~GS6 are impedance converters, which can be implemented with voltage follower made by operational amplifiers; B1, B2 and B3 are the output terminals after signal conversion; The signal connected to the unit is under the control of the embedded microcomputer, and the mV, mA, thermal resistance, thermocouple and other signals can be directly converted to the specified standard signal, and the standard signal can be 5V during implementation.

Table 2 Switch S turn-on condition table (BX low level is to strobe this chip)

As shown in Figure 8, the isolation amplifier unit includes an isolation unit _U1 , a programmable gain amplifier circuit, and the isolation unit _U1 includes conversion capacitors C1 and C2, microelectronic digital single-pole double-throw switches KC11, KC12, KC21 and KC22 , the gating signal GL, the control signal D0 of the microelectronics digital switch, the described programmable gain amplifying circuit comprises the precision integrated operational amplifier U2, the programmable resistance network U3, the gain measurement circuit U4, and the described programmable resistance network U3 is composed of Composed of digital potentiometers SD1, SD2 and SD3, the gain measurement circuit U4 includes digital switches K1, K2, standard voltage Vb, digital switch control signal D1,

The embedded microcomputer as shown in Figure 9 includes an A/D converter, a reference voltage source, a DSP controller, a memory, a network interface, a USB interface, and a DS18B20 one-line bus digital temperature transmitter,

The embedded microcomputer is connected with the electric optical fiber or GPRS wireless communication.

The monitoring method based on the data acquisition monitoring module of the ball mill group monitoring system is characterized in that: it comprises the following steps:

A. Set a group of sensors, temperature sensors, pressure sensors, vibration sensors, particle size sensors, flow sensors, power sensors and liquid level sensors on the ball mill and ball mill hydrostatic bearings according to different monitoring targets to measure temperature, pressure, and vibration , particle size, flow rate, electricity and liquid level, the sensor output signal is obtained through the sensor;

B. The sensor output signal enters the network signal acquisition module, and feeds into the IN11~IN38 signal input terminals of the signal access unit, and simultaneously inputs the QH strobe signal, D ₂ , D ₁ and D ₀ control signals to the signal access unit, and the The sensor output signal is converted into a standard voltage signal I and output through the output terminals A ₁ , A ₂ and A ₃ , and the QH strobe signal is in the strobe state when it is low level; the signal access unit includes the "eight select one" chip UIN1 , UIN2 and UIN3, strobe signal QH, D ₂ , D ₁ and D ₀ control signals, the output terminal A ₁ connected with the chip UIN1, the output terminal A ₂ connected with the chip UIN2, and the The chip UIN3 is connected to the output terminal _A3 , the chip UIN1 is provided with input terminals IN11-IN18, the chip UIN2 is provided with input terminals IN21-IN28, and the chip UIN3 is provided with input terminals IN31-IN38. The above-mentioned output terminals A ₁ , A ₂ and A ₃ are connected to the signal conversion unit;

The standard voltage signal Ⅰ output through the output terminals A ₁ , A ₂ and A ₃ is sent to the signal conversion unit, and at the same time, the Vout reference voltage source, D ₂ , D ₁ and D ₀ control signals are input to the signal conversion unit, and the standard voltage signal Ⅰ Converted into a standard voltage signal II and output through the signal conversion output terminals _B1 , _B2 and B3, Vout=2.5V is selected during implementation, and the voltage ripple is ≤0.5%; the signal conversion unit includes a reference voltage source Vout, a resistor R1～ R11, electronic switch S1～S7, latch SC, latch strobe signal BX, impedance converter GS1～GS6, variable resistor W1, D ₂ , D ₁ and D ₀ control signals, signal conversion output terminal B1 , B2 and B3, the signal conversion output terminals B1, B2 and B3 are connected with the isolation amplification unit;

In order to amplify the signal without interference, the standard voltage signal II is given to the isolation amplifier unit, and at the same time, the GL gating signal is input to the isolation amplifier unit, and the isolation control signals D ₀ and D ₁ are selected and controlled by the embedded microcomputer. Transform the standard voltage signal II into an amplified analog signal. When the GL strobe signal is low, it is in the strobe state; the amplified analog signal enters the embedded microcomputer for A/D conversion, converts the analog signal into a digital signal, and the digital signal passes through the digital signal. After processing by the processor DSP, it can be stored or transmitted to the power optical fiber and GPRS wireless communication;

C. The network power metering module collects the ball mill and ball mill hydrostatic bearing power, and completes the measurement, processing, storage and transmission of various power quantities;

D. The data collected by the network signal acquisition module and the data collected by the network power metering module enter the data monitoring center of the data acquisition and monitoring module through power optical fiber or GPRS wireless communication, and are sent to the industrial computer of the data monitoring center. The data display screen connected to the machine phase displays data for scheduling by the dispatching management department.

Claims (2)

1. a data acquisition and monitoring module for ball grinder group monitoring system, is characterized in that comprising data monitoring center, data transmission device, ball grinder group monitoring modular, network module for metering electric quantity,

Described data monitoring center comprises industrial computer, therewith the data display screen that is connected of industrial computer,

Described data transmission device comprises power optical fiber or GPRS wireless telecommunications,

Described ball grinder group monitoring modular is made up of one group of ball mill unit monitoring modular, and described ball mill unit monitoring modular comprises the sensor be arranged on ball mill, therewith the network signal acquisition module that is connected of sensor,

Described network module for metering electric quantity comprises a group network electric quantity metering device controller, one group of using electricity system being connected of network electric quantity metering device controller therewith respectively, this group of using electricity system is by mains supply, described network electric quantity metering device controller comprises current sensor CT, voltage sensor PT, ASLC-electrical measurement special chip, keyboard, LCD display, RS485 interface, house dog, report to the police, clock circuit, DS18B20 temperature element, with the On-off signal signal end of Phototube Coupling, with the switching value output signal end of Phototube Coupling, with the constant current output current source of Phototube Coupling,

Described network signal acquisition module is connected with described power optical fiber or GPRS wireless telecommunications respectively with described network electric quantity metering device controller, and described power optical fiber or GPRS wireless telecommunications are connected with described industrial computer,

Sensor on described ball mill comprises the temperature sensor be located on ball mill, pressure sensor, vibrating sensor, particle size sensor, flow sensor, electrical quantity sensor and liquid level sensor,

Described network signal acquisition module comprises signal access unit, signal conversion unit, isolation amplifying unit, embedded micro computer,

Described signal access unit comprises " eight select one " chip UIN1, UIN2 and UIN3, gating signal QH, D ₂, D ₁and D ₀control signal, the output terminals A be connected with described chip UIN1 ₁, the output terminals A be connected with described chip UIN2 ₂, the output terminals A be connected with described chip UIN3 ₃, described chip UIN1 is provided with input IN11 ~ IN18, and described chip UIN2 is provided with input IN21 ~ IN28, and described UIN3 is provided with input IN31 ~ IN38, described output terminals A ₁, A ₂and A ₃be connected with described signal conversion unit,

Described signal conversion unit comprises reference voltage source Vout, resistance R1 ~ R11, electronic switch S1 ~ S7, latch SC, latch enable signal BX, impedance transformer GS1 ~ GS6, variable resistance W1, D ₂, D ₁and D ₀control signal, signal conversion output B1, B2 and B3, described signal conversion output B1, B2 are connected with described isolation amplifying unit with B3,

Described isolation amplifying unit comprises isolated location U ₁, Programmable Gain Amplifier Circuit, described isolated location U ₁comprise conversion electric capacity C1 and C2, microelectronic digital single-pole double-throw switch (SPDT) KC11, KC12, KC21 and KC22, gating signal GL, the control signal D0 of microelectronic digital switch, described Programmable Gain Amplifier Circuit comprises accurate integrated operational amplifier U2, programmable resistive network U3, gain measurement circuit U 4, described programmable resistive network U3 is by digital regulation resistance SD1, SD2 and SD3 formed, and described gain measurement circuit U 4 comprises digital switch K1, K2, normal voltage Vb, the control signal D1 of digital switch

Described embedded micro computer comprises A/D converter, reference voltage source, dsp controller, memory, network interface, USB interface, DS18B20 one-wire bus formula digital temperature transmitter,

Described embedded micro computer is connected with described power optical fiber or GPRS wireless telecommunications.

2., based on a monitoring method for the data acquisition and monitoring module of ball grinder group monitoring system, it is characterized in that: it comprises the steps:

A, on ball mill and ball mill hydrostatic bearing, one group of sensor is set according to different monitoring objectives, temperature sensor, pressure sensor, vibrating sensor, particle size sensor, flow sensor, electrical quantity sensor and liquid level sensor, in order to measuring tempeature, pressure, vibration, granularity, flow, electricity and liquid level, obtain sensor output signal through sensor;

B, sensor output signal enter network signal acquisition module, and feed IN11 ~ IN38 signal input part of signal access unit, simultaneously to signal access unit input QH gating signal, and D ₂, D ₁and D ₀control signal, is transformed into standard voltage signal I through output terminals A by sensor output signal ₁, A ₂and A ₃exporting, is strobe state when QH gating signal is low level; Described signal access unit comprises " eight select one " chip UIN1, UIN2 and UIN3, gating signal QH, D ₂, D ₁and D ₀control signal, the output terminals A be connected with described chip UIN1 ₁, the output terminals A be connected with described chip UIN2 ₂, the output terminals A be connected with described chip UIN3 ₃, described chip UIN1 is provided with input IN11 ~ IN18, and described chip UIN2 is provided with input IN21 ~ IN28, and described chip UIN3 is provided with input IN31 ~ IN38, described output terminals A ₁, A ₂and A ₃be connected with signal conversion unit;

Through output terminals A ₁, A ₂and A ₃the standard voltage signal I exported feeds signal conversion unit, simultaneously to signal conversion unit input Vout reference voltage source, and D ₂, D ₁and D ₀control signal, is transformed into standard voltage signal II through signal conversion output B by standard voltage signal I ₁, B ₂export with B3, select Vout=2.5V during enforcement, voltage ripple≤0.5%; Described signal conversion unit comprises reference voltage source Vout, resistance R1 ~ R11, electronic switch S1 ~ S7, latch SC, latch enable signal BX, impedance transformer GS1 ~ GS6, variable resistance W1, D ₂, D ₁and D ₀control signal, signal conversion output B1, B2 and B3, described signal conversion output B1, B2 are connected with isolation amplifying unit with B3;

In order to make, signal is interference-free to be amplified, and standard voltage signal II is fed isolation amplifying unit, simultaneously to isolation amplifying unit input GL gating signal, and isolation control signal D ₀and D ₁, under the selected control of embedded micro computer, standard voltage signal II being transformed into amplified analog signal, is strobe state when GL gating signal is low level; Amplified analog signal enters embedded micro computer and carries out A/D conversion, converts analog signal to data signal, and data signal can carry out storing or be transferred to power optical fiber and GPRS wireless telecommunications after digital signal processor DSP process;

C, network module for metering electric quantity gather ball mill and ball mill hydrostatic bearing electricity, complete the metering of multiple electricity, process, storage and transmission;

The data that D, network signal acquisition module collect and the data that network module for metering electric quantity collects enter the data monitoring center of data acquisition and monitoring module through power optical fiber or GPRS wireless telecommunications, and feed the industrial computer at data monitoring center, show data by the data display screen that industrial computer is connected therewith, dispatch for management and running department.