CN116909195A

CN116909195A - Low-power-consumption mining bus type data acquisition system

Info

Publication number: CN116909195A
Application number: CN202311076343.1A
Authority: CN
Inventors: 杨晓茂; 李阔; 窦涛; 舒坦; 冯强; 杨虎腾
Original assignee: Sichuan Aerospace Electro & Hydraulic Control Co ltd
Current assignee: Sichuan Aerospace Electro & Hydraulic Control Co ltd
Priority date: 2023-08-24
Filing date: 2023-08-24
Publication date: 2023-10-20

Abstract

The invention discloses a mining bus type data acquisition system with low power consumption, wherein a plurality of data collectors, analog sensors and digital sensors are arranged in a hydraulic support, each data collector collects signals of 4 paths of analog sensors, and the data collectors and the digital sensors transmit data to a support controller through a 485 bus. The data acquisition system designed by the invention acquires the data of a plurality of sensors through the data acquisition device, and transmits the data to the master controller through the bus after preprocessing, so that the laying of cables can be reduced, the installation and maintenance difficulty can be reduced, and the aims of reducing the cost and enhancing the efficiency can be achieved.

Description

Low-power-consumption mining bus type data acquisition system

Technical Field

The invention relates to a mining bus type data acquisition system with low power consumption.

Background

Along with the continuous promotion of intelligent construction of fully mechanized coal mining face, the demand of hydraulic support controller for sensor data is all promoted increasingly in sensor kind and quantity, and support controller, sensor connection schematic diagram are as shown in fig. 1. As can be seen from fig. 1, the sensor is directly connected with the external interface of the bracket controller, and the cable connected with part of the sensor is longer, so that the data transmission of the sensor acquisition is unstable. The variety and the quantity of the sensors are increased, the panel interfaces of the bracket controller are correspondingly increased, the size of the bracket controller is increased, and the production material cost is increased. In actual installation and later maintenance, cables need to be fixed in the mounting holes on the support in a penetrating way, the higher the support is, the longer the cables are, the greater the mounting difficulty is, and later maintenance is inconvenient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides the mining bus type data acquisition system which is used for acquiring data of a plurality of sensors through the data acquisition device, preprocessing the data and transmitting the data to the master controller through the bus, so that the laying of cables can be reduced, the installation and maintenance difficulty can be reduced, and meanwhile, the cost reduction and efficiency improvement are realized.

The aim of the invention is realized by the following technical scheme: a mining bus type data acquisition system with low power consumption is characterized in that a plurality of data collectors, analog sensors and digital sensors are arranged in a hydraulic support, each data collector collects signals of 4 paths of analog sensors, and the data collectors and the digital sensors transmit data to a support controller through a 485 bus.

The data acquisition device comprises a main control chip, a power supply module, a sensor switch, a data acquisition device single-channel switch, an ADC acquisition module and a relay;

the 4 paths of analog sensors are marked as sensors 1-4, and a single-channel switch of the data acquisition device is respectively connected with the sensors 1-4 and used as a power switch for controlling the sensors 1-4; the sensor switch is a main switch of the sensor power supply; the acquired data Sensor1 to Sensor4 of the sensors 1 to 4 are respectively connected to the ADC acquisition module; the main control chip is respectively connected with the power supply module, the sensor switch, the four data acquisition unit single-channel switches, the ADC acquisition module and the relay.

And the main control chip adopts GD32F303CB.

The power supply module comprises power supply chips TPS5430DDA and AMS1117-33 voltage stabilizing chips; the 7 pin of the power supply chip TPS5430DDA is connected with the 12V power supply input VIN+, the 6 pin and the 9 pin are grounded, and the 8 pin is connected with the inductor L3 and then outputs 5V voltage to the voltage stabilizing chip AMS1117-33; the 1 pin and the 4 pin of the power supply chip TPS5430DDA are respectively connected across the two ends of the inductor L3; a capacitor is connected between the 1 pin of the power chip TPS5430DDA and the inductor L3, the capacitor is respectively connected with the inductor L3 and the cathode of the diode D20, and the anode of the diode D20 is grounded; a resistor is connected between the 4 pin of the power supply chip TPS5430DDA and the inductor L3, and one end of the resistor connected with the 4 pin is connected in series with another resistor and then grounded; a capacitor is connected between the inductor L3 and the 5V voltage output port, and the negative electrode of the capacitor is grounded;

the 3 pin of the voltage stabilizing chip AMS1117-33 is connected with 5V voltage input, the 1 pin is grounded, the 2 pin outputs 3.3V voltage to the main control chip GD32F303CB, a capacitor is connected between the 1 pin and the 3 pin, and two capacitors are connected between the 2 pin and the 3 pin in parallel.

The voltage output port of the power supply chip TPS5430DDA is connected with two diodes DZQ1 and DZQ in parallel, the cathodes of the anodes of the diodes DZQ and DZQ are connected with the voltage output port of the power supply chip TPS5430DDA, the anode is connected with a BT134W-600E silicon controlled rectifier, and the other end of the BT134W-600E silicon controlled rectifier is connected with a 12V power supply input VIN+.

The sensor switch comprises an operational amplifier Max4372TEUK-T, a transistor IRF4905 and a triode S8050LT1, wherein a 5 pin of the operational amplifier Max4372TEUK-T is connected with 12V input voltage VCC through a piezoresistor FR1, a 4 pin of the operational amplifier Max4372TEUK-T is connected with external input voltage VIN+ through diodes D21 and D22, and the external input voltage VIN+ is also connected with 13 pins of a double-row pin connector Header7X 2; the 4 pins of the operational amplifier Max4372TEUK-T are also connected with the 10 pins of the main control chip GD32F303CB through a resistor R30, a V1 signal is output to the main control chip GD32F303CB, and the other end of the resistor R30 is connected with a resistor R34 in series and then grounded; the 4 pin and the 3 pin of the operational amplifier Max4372TEUK-T are connected with one end of a capacitor C13, and the other end of the capacitor C13 is grounded; the 2 pin of the operational amplifier Max4372TEUK-T is connected with the 11 pin of the main control chip GD32F303CB, an I1 signal is output to the main control chip GD32F303CB, and the 2 pin is grounded through a resistor R35;

the drain electrode of the transistor IRF4905 is connected with the voltage VSENSE after the protection of the VCC12, the source electrode is connected with the 12V input voltage VCC, the diode D11 is connected between the drain electrode and the source electrode, the grid electrode of the transistor IRF4905 is connected with the 3 pin of the triode S8050LT1, and the resistor R26 is connected between the grid electrode and the source electrode; the 1 pin of the triode S8050LT1 is connected with the resistor R31 and the diode D14 in series and then is connected with the SENS-VC signal output by the 12 pin of the main control chip GD32F303CB, and the SENS-VC signal is a sensor power supply main switch signal; the 2 pin of the triode S8050LT1 is grounded, and a resistor R33 is connected between the 2 pin and the 1 pin.

The single-channel switch of the data collector comprises two field effect transistors IRLML6302, wherein the grid electrode of the first field effect transistor IRLML6302 is connected with the 3 pin of a triode Q2, the source electrode is connected with a voltage VSENSE after VCC12 protection, the drain electrode is respectively connected with the positive electrode of a diode D2 and the negative electrode of a diode D1, the negative electrode of the diode D2 is connected with the voltage VSENSE after VCC12 protection, and a resistor R8 is connected between the grid electrode and the source electrode of the first field effect transistor IRLML 6302; the 2 pin of the triode Q2 is grounded, the 1 pin is connected with control signals output by pins 45, 46, 17 or 18 of the main control chip GD32F303CB after passing through a resistor R14, and the data acquisition device channel 1 in the embodiment is connected with a PEN1 control signal output by pin 46;

the diode D2 and the resistor R2 are connected in parallel between the drain electrode and the source electrode of the second field effect transistor IRLML6302, the resistor R11 is connected between the grid electrode and the source electrode of the second field effect transistor IRLML6302, the grid electrode is connected with the 3 pin of the triode Q4, the 1 pin of the triode Q4 is connected with the drain electrode of the second field effect transistor IRLML6302 through the resistor, and the 2 pin of the triode Q4 is grounded after being connected with the diode D6;

the positive electrode of the diode D1 is connected with the 4 pin of the sensor connecting seat DCX-15, the 1 pin of the DCX-15 is grounded, the 3 pin is connected with the resistor R1 and then is connected with the input signal of the sensor1 (in the embodiment, the input signal AN1 of the sensor 1), and the resistor R1 is connected with the resistor R3 in series and then is grounded; the positive electrode of the diode D1 is grounded after passing through the capacitor C3, one end of the resistor R1 connected with the sensor input signal AN1 is respectively connected with the zener diode DZ1 and the capacitor C4, and the other ends of the zener diode DZ1 and the capacitor C4 are grounded;

both transistor Q2 and transistor Q4 employ S8050LT1.

The ADC acquisition module comprises two double operational amplifiers LM358, each double operational amplifier LM358 acquires data of two sensors, the 1 pin and the 2 pin of each double operational amplifier LM358 are connected with one end of a resistor R5, the other end of the resistor R5 is connected with a sensor signal interface of a main control chip GD32F303CB, and signals of the sensors are transmitted to the main control chip GD32F303CB; one end of the resistor R5 connected with the main control chip GD32F303CB is also connected with one end of the voltage stabilizing diode DZ2, one end of the capacitor C5, one end of the capacitor C6 and one end of the resistor R9 respectively, and the other ends of the voltage stabilizing diode DZ2, the capacitor C5, the capacitor C6 and the resistor R9 are grounded; the 3 pin of the dual operational amplifier LM358 is connected with the input signal of the sensor, the 4 pin is grounded, and the 5 pin is connected with the input signal of the other sensor; the 6 pin and the 7 pin of the dual operational amplifier LM358 are connected with one end of a resistor R7, and the other end of the resistor R7 is connected with the other sensor signal interface of the main control chip GD32F303CB; one end of the resistor R7 connected with the main control chip GD32F303CB is also connected with one end of the resistor R13, the capacitor C7, the capacitor C8 and the zener diode DZ3 respectively, and the other ends of the resistor R13, the capacitor C7, the capacitor C8 and the zener diode DZ3 are grounded; the 8 pin of the dual op amp LM358 is grounded through a capacitor C2, and the 8 pin is also connected to the VIN + port.

The relay comprises an RLY1 relay, a triode S8050LT1, wherein the 1 pin of the RLY1 relay is connected with VIN+ voltage input, the 8 pin is connected with the 3 pin of the triode S8050LT1, diodes D5 and D18 are connected in parallel between the 1 pin and the 8 pin of the RLY1 relay, the 3 pin and the 4 pin of the RLY1 relay are respectively connected with the 9 pin and the 10 pin of a double-row needle connector Header7X2, and the 5 pin and the 6 pin of the RLY1 relay are respectively connected with the 7 pin and the 8 pin of the double-row needle connector Header7X 2;

the 2-pin of the triode S8050LT1 is grounded, the 1-pin is connected with a resistor R66 and a diode D19 and then is connected with a CTR2 signal output by the 32-pin of the main control chip GD32F303CB, and a resistor R65 is connected between the 1-pin and the 2-pin.

The beneficial effects of the invention are as follows:

1. the data acquisition system designed by the invention acquires the data of a plurality of sensors through the data acquisition device, and transmits the data to the master controller through the bus after preprocessing, so that the laying of cables can be reduced, the installation and maintenance difficulty can be reduced, and the aims of reducing the cost and enhancing the efficiency can be achieved.

2. The data acquisition device is small in structure and light in weight, is fixed on the hydraulic support through screws, is firm and reliable, and is convenient to detach. According to actual sensor mounted position and quantity, a plurality of data collectors are mounted at proper positions in the frame, the nodes are mounted in the relative concentrated areas of the sensors in the support, analog signals are collected and stored in situ to be digital signals through the data collectors after nearby collection, and the digital signals are sent to the controller through a digital bus, so that the problems that accurate measurement and compensation cannot be carried out on site due to different lengths of cables and inconsistent line losses, and the sensor data errors are large are solved.

3. The collectors are serially connected and expanded by adopting a bus, and meanwhile, the bus can be directly connected with a digital sensor which is developed later. The relative physical locations of all access devices on the bus can be identified by the controller software and an automatic addressing function is implemented.

Drawings

FIG. 1 is a schematic diagram of a prior art bracket controller, sensor connection;

FIG. 2 is a schematic device mounting diagram of the data acquisition system of the present invention;

FIG. 3 is a schematic diagram of a data acquisition system according to the present invention;

FIG. 4 is a schematic diagram of a data collector according to the present invention;

FIG. 5 is a schematic diagram of a controller circuit of the present invention;

FIG. 6 is a schematic diagram of a power chip TPS5430DDA circuit;

FIG. 7 is a schematic diagram of AMS1117-33 voltage regulator chip circuitry;

FIG. 8 is a schematic diagram of a sensor master switch;

FIG. 9 is a schematic diagram of a single channel switch for a data collector;

FIG. 10 is a schematic diagram of ADC sampling;

FIG. 11 is a schematic diagram of a relay;

fig. 12 is an addressing flow chart;

fig. 13 is a circuit diagram of the RS485 interface of the data collector.

Detailed Description

The technical scheme of the invention is further described below with reference to the accompanying drawings.

As shown in fig. 2 and 3, in the mining bus type data acquisition system with low power consumption, a plurality of data collectors, analog sensors and digital sensors are installed in a hydraulic support, each data collector collects signals of 4 paths of analog sensors, and the data collectors and the digital sensors transmit data to a support controller through a 485 bus. The data acquisition device is arranged in a relatively concentrated area of the sensor in the bracket, and converts analog signals into digital signals for storage after nearby acquisition of data of the analog sensor and sends the digital signals to the master controller through a 485 bus. The analog sensors comprise an analog upper protection pressure sensor, an analog proximity sensor, an analog pull wire sensor, an analog top beam cooperative data angle sensor, an analog infrared sensor, an analog front column pressure sensor, an analog travel sensor, an analog rear column/balance pressure sensor and the like, wherein analog signals are collected by the analog sensors, data are required to be processed through a data collector, then the data are accessed into a 485 bus, and the data are transmitted to the support controller through the 485 bus. Each data collector collects 4 paths of analog sensor signals, and signals of various analog sensors can be collected through a plurality of data collectors. The digital sensors comprise digital laser ranging sensors, digital inclination angle sensors (connecting rods), digital inclination angle sensors (bases) and the like, and data acquired by the digital sensors can be directly connected to a 485 bus and transmitted to the support controller through the 485 bus.

The collectors are serially connected and expanded by adopting a bus, and meanwhile, the bus can be directly connected with a digital sensor which is developed later. The relative physical locations of all access devices on the bus can be identified by the controller software and an automatic addressing function is implemented.

The data acquisition unit adopts a singlechip with ARM4 architecture and is used for information interaction between the data acquisition unit and the bracket controller. As shown in fig. 4, the inside comprises a main control chip, a power supply module, a sensor switch, a data collector single-channel switch, an ADC acquisition module and a relay; the power supply module reduces the input 12V voltage to 3.3V through twice voltage drop to supply power for a main control chip on the singlechip;

the 4 paths of analog sensors are marked as sensors 1-4, and a single-channel switch of the data acquisition device is respectively connected with the sensors 1-4 and used as a power switch for controlling the sensors 1-4; the sensor switch is a main switch of the sensor power supply; the acquired data Sensor1 to Sensor4 of the sensors 1 to 4 are respectively connected to the ADC acquisition module; the main control chip is respectively connected with the power supply module, the sensor switch, the four single-channel switches of the data acquisition unit, the ADC acquisition module and the relay; the main control chip adopts GD32F303CB, which not only has low power consumption, but also has strong integration capability, and is beneficial to later development, the circuit is shown in figure 5, the 13-16 pins are respectively used as signal interfaces of 4 sensors, the 45, 46, 17 and 18 pins are respectively used as the output ends of control signals PEN 1-PEN 4 of the single-channel switches of four data collectors, and the 12 pins are used as the output ends of control signals SENS-VC of the sensor switches.

The four paths of acquisition interfaces of the main control chip are all voltage type interfaces, and can acquire voltage values of 0V-5V. The output voltage values of the mining analog sensors are all between 0.5V and 4.5V, and if the voltage values collected by the data collector are always lower than 400mV in 30 sampling periods, judging that no sensor or sensor abnormality exists at the position, and disconnecting the power supply at the position. After 100 sampling periods, the power supply is turned on, the acquisition value is read, whether the acquisition value is larger than 400mV is judged, if the acquisition value is larger than 400mV, a new sensor is connected, and at the moment, the acquisition value is not turned off.

The main control chip controls the relay to serve as a switch between the data collector and the RS485 interface of the subsequent equipment, and the switch of the relay is controlled by a CTR2 signal output by a pin 32 of the main control chip. The bracket controller recognizes the relative physical positions of all access devices on the bus through program control, and realizes the automatic addressing function.

The whole in-frame program adopts a ModelBus-RTU protocol, performs information interaction with equipment information in the data acquisition unit, acquires and calculates different sensing elements, and outputs in various formats; the hardware and the software realize the platform and modularized design, and when series products are developed in the later period, the original software and hardware platform can be directly applied, the service functions can be expanded and reduced, the repeated investment is reduced, and the rapid development is realized.

As shown in fig. 6 and 7, the power module comprises power chips TPS5430DDA, AMS1117-33 voltage stabilizing chips; as shown in fig. 6, pin 7 of the power supply chip TPS5430DDA is connected to the 12V power supply input vin+, pins 6 and 9 are grounded, and pin 8 is connected to the inductor L3 and then outputs 5V voltage to the voltage stabilizing chip AMS1117-33; the 1 pin and the 4 pin of the power supply chip TPS5430DDA are respectively connected across the two ends of the inductor L3; a capacitor is connected between the 1 pin of the power chip TPS5430DDA and the inductor L3, the capacitor is respectively connected with the inductor L3 and the cathode of the diode D20, and the anode of the diode D20 is grounded; a resistor is connected between the 4 pin of the power supply chip TPS5430DDA and the inductor L3, and one end of the resistor connected with the 4 pin is connected in series with another resistor and then grounded; a capacitor is connected between the inductor L3 and the 5V voltage output port, and the negative electrode of the capacitor is grounded;

as shown in FIG. 7, the 3 pins of the voltage stabilizing chip AMS1117-33 are connected to a 5V voltage input, the 1 pin is grounded, the 2 pin outputs 3.3V voltage to the main control chip GD32F303CB, a capacitor is connected between the 1 pin and the 3 pin, and two capacitors are connected between the 2 pin and the 3 pin in parallel.

The voltage output port of the power supply chip TPS5430DDA is connected with two diodes DZQ1 and DZQ (DZQ and DZQ are both DZEN-5.6V), the cathodes of the anodes of the diodes DZQ1 and DZQ are connected with the voltage output port of the power supply chip TPS5430DDA, the anodes are connected with BT134W-600E thyristors (T1 and T2), the other ends of the BT134W-600E thyristors are connected with a 12V power supply input VIN+, and the anodes are grounded after passing through resistors RA2 and CT 2. The minimum supply voltage under the mine is 12V, so the collector can only adopt 12V supply voltage input. Because the heat generated by the power supply is large, the voltage is reduced from 12V to 5V by adopting a power supply chip TPS5430DDA, and then is reduced from 5V to 3.3V by adopting an AMS1117-33 voltage stabilizing chip. Through the voltage drop twice, heat generated by the power supply can be distributed to the two diodes DZQ and DZQ, so that the heat dissipation effect is better, and the power consumption is reduced.

The power supply voltage of the sensor is provided by the data collector, and 12V voltage provided by an input interface of the data collector is adopted. The sensor switch circuit is shown in fig. 8, and the data acquisition program in fig. 8 controls the on and off of the sensor switch by the level of the "pull-up" and "pull-down" SENS-VC pins, thereby turning on and off the power supply of the sensor for the entire data acquisition. When the data collector does not collect the sensor data, the data collector can close the sensor switch, so that the data collector is in a dormant state, and the energy consumption is saved. The sensor switch comprises an operational amplifier Max4372TEUK-T (U3), a transistor IRF4905 (Q9) and a triode S8050LT1 (Q13), wherein a 5 pin of the operational amplifier Max4372TEUK-T is connected with 12V input voltage VCC through a piezoresistor FR1, a 4 pin of the operational amplifier Max4372TEUK-T is connected with external input voltage VIN+ through diodes D21 and D22, and the external input voltage VIN+ is also connected with 13 pins of a double-row pin connector Header7X2 (PCB adapter); the 4 pins of the operational amplifier Max4372TEUK-T are also connected with the 10 pins of the main control chip GD32F303CB through a resistor R30, a V1 signal is output to the main control chip GD32F303CB, and the other end of the resistor R30 is connected with a resistor R34 in series and then grounded; the 4 pin and the 3 pin of the operational amplifier Max4372TEUK-T are connected with one end of a capacitor C13, and the other end of the capacitor C13 is grounded; the 2 pin of the operational amplifier Max4372TEUK-T is connected with the 11 pin of the main control chip GD32F303CB, an I1 signal is output to the main control chip GD32F303CB, and the 2 pin is grounded through a resistor R35;

The main control chip analyzes the port data of the sensors 1 to 4 through sampling, judges the working state of the Sensor of the sampling port, and judges whether power is supplied or not. The operating conditions may be categorized as normal, short-circuited, open-circuited, or sensor operating failure. Such as: PEN1 state changes during short circuit; AN1 samples below 30mV as no connection, open circuit; AN1 sampling is less than or equal to 0.4V or more than 4.6V, which is regarded as sensor fault.

Each data collector comprises 4 data collection interfaces, and the power supply of each data collection interface is independently controlled through a single-channel switch of the data collector. When part of the interfaces are not used, the single-channel switch of the data acquisition device can be independently closed. The four single-channel switches of the data collector have the same structure, and a channel is taken as an example for illustration, and the schematic diagram is shown in fig. 9; in the figure, PEN1 is a control signal of a single-channel switch of a data acquisition unit output by a main control chip. The acquisition channel of the sensor intermittently works under the control of software, so that the power consumption of the whole circuit can be reduced.

both transistor Q2 and transistor Q4 employ S8050LT1.

The main control chip GD32F303CB judges whether the working state of the sensor is normal or not by analyzing the AN1 data, and controls whether VSENSE supplies power to the sensor or not through PEN1 level.

The ADC acquisition module periodically reads data and controls the intermittent acquisition of the data acquisition unit through a program; if the period is set to be 1s for reading data once, 1s for starting the ADC to collect, so that the data collector intermittently performs data collection, and the power consumption on the whole circuit can be reduced; at the time of data reading, a sensor switch (SENS-VC of FIG. 8) of the data collector is turned on; when not reading, the sensor switch of the data collector is turned off.

The data acquisition device can accept data input of various sensors, including the existing analog sensors such as pressure, travel, inclination angle, distance, laser, coal machine position and the like. The analog sensor output voltage values are all between 0.5V and 4.5V. If the sampling period is 1s, the data of a certain channel is always less than 400 millivolts if the sampling period is 30 times, the channel is not used or the sensor is abnormal and cannot work, the program can automatically turn off the power supply and send out error instructions. And waiting 100 sampling periods, turning on the power supply, reading the acquisition value, judging whether the acquisition value is greater than 400mV, and if so, accessing a new sensor, wherein the power supply of the channel is not turned off.

The ADC of the data collector is 12-bit collection, and collects an analog value of 0-3.3V (the corresponding resolution is 0-4095). The data input of the sensor is 0.5-4.5V, and the input voltage is acquired by the ADC after being divided; the ADC acquisition module comprises two dual operational amplifiers LM358, each dual operational amplifier LM358 acquiring data from two sensors, the principle of which is shown in fig. 10 (the other dual operational amplifier LM358 is used to acquire data from sensors 3 and 4, not shown). The 1 pin and the 2 pin of the dual operational amplifier LM358 are connected with one end of a resistor R5, the other end of the resistor R5 is connected with a Sensor signal interface of a main control chip GD32F303CB, and in the embodiment, the two pins are connected with 13 pins of the main control chip GD32F303CB to transmit a signal Sensor1 of a Sensor1 to the main control chip GD32F303CB; one end of the resistor R5 connected with the main control chip GD32F303CB is also connected with one end of the voltage stabilizing diode DZ2, one end of the capacitor C5, one end of the capacitor C6 and one end of the resistor R9 respectively, and the other ends of the voltage stabilizing diode DZ2, the capacitor C5, the capacitor C6 and the resistor R9 are grounded; the 3 pin of the dual operational amplifier LM358 is connected with the input signal AN1 of the sensor1, the 4 pin is grounded, and the 5 pin is connected with the input signal AN2 of the sensor 2; the pins 6 and 7 of the dual operational amplifier LM358 are connected to one end of a resistor R7, and the other end of the resistor R7 is connected to another Sensor signal interface of the master control chip GD32F303CB, in this embodiment, connected to the pin 14 of the master control chip GD32F303CB, to transmit the signal Sensor2 of the Sensor2 to the master control chip GD32F303CB; one end of the resistor R7 connected with the main control chip GD32F303CB is also connected with one end of the resistor R13, the capacitor C7, the capacitor C8 and the zener diode DZ3 respectively, and the other ends of the resistor R13, the capacitor C7, the capacitor C8 and the zener diode DZ3 are grounded; the 8 pin of the dual op amp LM358 is grounded through a capacitor C2, and the 8 pin is also connected to the VIN + port.

After the voltage division (R9/(r5+r9) =3/5) of the Sensor1 shown in fig. 9, the acquisition voltage corresponding to the ADC acquisition value of the Sensor1 (Sensor 1) is 0.6 times the input voltage. The data acquisition voltage calculation formula is as follows:

from the above two formulas

When the collected data is larger than 3200mV, larger errors can be generated, and data compensation can be adopted for data with the value larger than 3200mV to fit. The data fitting formula is as follows:

Y＝x+a(x-3000) ³ +b(x-3000) ² +c(x-3000)。

y is a fitted numerical value, x is an actual acquisition value, and a, b and c are fitting coefficients.

As shown in fig. 11, the relay includes an rli 1 relay, a triode S8050LT1, wherein pin 1 of the rli 1 relay is connected with vin+ voltage input, pin 8 is connected with pin 3 of the triode S8050LT1, diodes D5 and D18 are connected in parallel between pin 1 and pin 8 of the rli 1 relay, pin 3 and pin 4 of the rli 1 relay are respectively connected with pin 9 and pin 10 of the double-row pin connector Header7X2, and pin 5 and pin 6 of the rli 1 relay are respectively connected with pin 7 and pin 8 of the double-row pin connector Header7X 2;

the 2-pin of the triode S8050LT1 is grounded, the 1-pin is connected with a resistor R66 and a diode D19 and then is connected with a CTR2 signal output by the 32-pin of the main control chip GD32F303CB, and a resistor R65 is connected between the 1-pin and the 2-pin. The relay is equivalent to a switch of the whole bus in the rack, and CTR2 is conducted when being pulled up; when pulled low, it will close. A triode of S8050LT1 is added in front of the relay, so that the relay is allowed to work at lower voltage, and the power consumption of the relay is extremely low.

Each data collector is provided with a relay, and when the in-frame device is automatically addressed, the relay can be controlled by a program to connect or disconnect the current device from the following devices. When the controller issues an automatic addressing command, the collector relay will be disconnected after 1 second. The controller sends out a first frame address i after sending out an automatic addressing command 2s, and the first frame data collector receives the subsequent addressing frame number i for storage, controls the relay to be connected with subsequent equipment and sends the subsequent equipment to the previous frame addressing reply and the next frame number addressing frame number (i+1); thus pushing it in until it is sent to the last device. Finally, the device sends out 5 backward addressing commands, and if the addressing command still does not receive a reply, the device is considered as the last device, and sends out an addressing ending command. As shown in fig. 12.

The RS485 interface design of the data collector is shown in fig. 13, and the TD (H) 541S485H chip is used to convert the signal into a 485 signal.

Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.

Claims

1. A mining bus type data acquisition system with low power consumption is characterized in that a plurality of data collectors, analog sensors and digital sensors are installed in a hydraulic support, each data collector collects signals of 4 paths of analog sensors, and the data collectors and the digital sensors transmit data to a support controller through a 485 bus.

2. The low-power consumption mining bus type data acquisition system according to claim 1, wherein the data acquisition device comprises a main control chip, a power supply module, a sensor switch, a data acquisition device single-channel switch, an ADC acquisition module and a relay;

3. The low-power-consumption mining bus type data acquisition system according to claim 2, wherein the main control chip adopts GD32F303CB.

4. The low-power-consumption mining bus type data acquisition system according to claim 2, wherein the power supply module comprises power supply chips TPS5430DDA and AMS1117-33 voltage stabilizing chips; the 7 pin of the power supply chip TPS5430DDA is connected with the 12V power supply input VIN+, the 6 pin and the 9 pin are grounded, and the 8 pin is connected with the inductor L3 and then outputs 5V voltage to the voltage stabilizing chip AMS1117-33; the 1 pin and the 4 pin of the power supply chip TPS5430DDA are respectively connected across the two ends of the inductor L3; a capacitor is connected between the 1 pin of the power chip TPS5430DDA and the inductor L3, the capacitor is respectively connected with the inductor L3 and the cathode of the diode D20, and the anode of the diode D20 is grounded; a resistor is connected between the 4 pin of the power supply chip TPS5430DDA and the inductor L3, and one end of the resistor connected with the 4 pin is connected in series with another resistor and then grounded; a capacitor is connected between the inductor L3 and the 5V voltage output port, and the negative electrode of the capacitor is grounded;

the 3 pins of the voltage stabilizing chip AMS1117-33 are connected with 5V voltage input, the 1 pin is grounded, the 2 pin outputs 3.3V voltage to the main control chip GD32F303CB, a capacitor is connected between the 1 pin and the 3 pin, and two capacitors are connected between the 2 pin and the 3 pin in parallel;

5. The low-power consumption mining bus type data acquisition system according to claim 2, wherein the sensor switch comprises an operational amplifier Max4372TEUK-T, a transistor IRF4905, a triode S8050LT1, a 5 pin of the operational amplifier Max4372TEUK-T is connected with a 12V input voltage VCC through a varistor FR1, a 4 pin of the operational amplifier Max4372TEUK-T is connected with an external input voltage vin+ through diodes D21 and D22, and the external input voltage vin+ is also connected with a 13 pin of a double-row pin connector Header7X 2; the 4 pins of the operational amplifier Max4372TEUK-T are also connected with the 10 pins of the main control chip GD32F303CB through a resistor R30, a V1 signal is output to the main control chip GD32F303CB, and the other end of the resistor R30 is connected with a resistor R34 in series and then grounded; the 4 pin and the 3 pin of the operational amplifier Max4372TEUK-T are connected with one end of a capacitor C13, and the other end of the capacitor C13 is grounded; the 2 pin of the operational amplifier Max4372TEUK-T is connected with the 11 pin of the main control chip GD32F303CB, an I1 signal is output to the main control chip GD32F303CB, and the 2 pin is grounded through a resistor R35;

6. The mining bus type data acquisition system with low power consumption according to claim 2, wherein the single-channel switch of the data acquisition device comprises two field effect transistors IRLML6302, the gate of the first field effect transistor IRLML6302 is connected with the 3 pin of the triode Q2, the source is connected with the voltage VSENSE after VCC12 protection, the drain is respectively connected with the anode of the diode D2 and the cathode of the diode D1, the cathode of the diode D2 is connected with the voltage VSENSE after VCC12 protection, and a resistor R8 is connected between the gate and the source of the first field effect transistor IRLML 6302; the 2 pin of the triode Q2 is grounded, the 1 pin is connected with control signals output by pins 45, 46, 17 or 18 of the main control chip GD32F303CB after passing through a resistor R14, and the data acquisition device channel 1 in the embodiment is connected with a PEN1 control signal output by pin 46;

both transistor Q2 and transistor Q4 employ S8050LT1.

7. The mining bus type data acquisition system with low power consumption according to claim 2, wherein the ADC acquisition module comprises two dual operational amplifiers LM358, each dual operational amplifier LM358 acquires data of two sensors, the 1 pin and the 2 pin of the dual operational amplifier LM358 are connected with one end of a resistor R5, the other end of the resistor R5 is connected with a sensor signal interface of a main control chip GD32F303CB, and signals of the sensors are transmitted to the main control chip GD32F303CB; one end of the resistor R5 connected with the main control chip GD32F303CB is also connected with one end of the voltage stabilizing diode DZ2, one end of the capacitor C5, one end of the capacitor C6 and one end of the resistor R9 respectively, and the other ends of the voltage stabilizing diode DZ2, the capacitor C5, the capacitor C6 and the resistor R9 are grounded; the 3 pin of the dual operational amplifier LM358 is connected with the input signal of the sensor, the 4 pin is grounded, and the 5 pin is connected with the input signal of the other sensor; the 6 pin and the 7 pin of the dual operational amplifier LM358 are connected with one end of a resistor R7, and the other end of the resistor R7 is connected with the other sensor signal interface of the main control chip GD32F303CB; one end of the resistor R7 connected with the main control chip GD32F303CB is also connected with one end of the resistor R13, the capacitor C7, the capacitor C8 and the zener diode DZ3 respectively, and the other ends of the resistor R13, the capacitor C7, the capacitor C8 and the zener diode DZ3 are grounded; the 8 pin of the dual op amp LM358 is grounded through a capacitor C2, and the 8 pin is also connected to the VIN + port.

8. The low-power consumption mining bus type data acquisition system according to claim 2, wherein the relay comprises an RLY1 relay, a triode S8050LT1, wherein a pin 1 of the RLY1 relay is connected with VIN+ voltage input, a pin 8 is connected with a pin 3 of the triode S8050LT1, diodes D5 and D18 are connected in parallel between the pin 1 and the pin 8 of the RLY1 relay, the pin 3 and the pin 4 of the RLY1 relay are respectively connected with a pin 9 and a pin 10 of a double-row pin connector Header7X2, and the pin 5 and the pin 6 of the RLY1 relay are respectively connected with a pin 7 and a pin 8 of a double-row pin connector Header7X 2;