阅读说明：本技术 压力触动型弧线运动控制系统 (Pressure touch type arc motion control system ) 是由 张德锋 于 2019-11-18 设计创作，主要内容包括：本发明属于摆动皮带的位置精确测量与控制技术领域,尤其是涉及一种压力触动型弧线运动控制系统,其特征在于包括相互连接的检测单元、现场仪表箱和工程师站,摆动皮带变频器,现场仪表箱包括电阻信号隔离变送器和直流电源,工程师站包括交换机和PLC系统,PLC系统与摆动皮带变频器相连接,检测单元包括滚动轮,检测弧线,设置在此检测弧形上的数个短弧线端点处的压力触动单元。本发明成本低廉、精度高,随着皮带的摆动,滚动轮会连续触动下方弧线轨迹上的压力触动装置,并将信号转化后传递至上位机系统,计算出每个弧线内的摆动速度,对各弧段的运行速度进行反馈控制,最终调节后实现各弧段内运行速度的最优化,均匀下料和链篦机平整进料。(The invention belongs to the technical field of accurate position measurement and control of a swing belt, and particularly relates to a pressure touch type arc motion control system which is characterized by comprising a detection unit, a field instrument box and an engineer station which are connected with each other, wherein the field instrument box comprises a resistance signal isolation transmitter and a direct current power supply, the engineer station comprises a switch and a PLC (programmable logic controller) system, the PLC system is connected with the swing belt frequency converter, the detection unit comprises a rolling wheel, a detection arc and a pressure touch unit arranged at a plurality of short arc line end points on the detection arc. The invention has low cost and high precision, along with the swinging of the belt, the rolling wheel can continuously touch the pressure touch device on the track of the lower arc line, and transmits the signal to the upper computer system after converting, calculates the swinging speed in each arc line, performs feedback control on the running speed of each arc section, and finally realizes the optimization of the running speed in each arc section after adjustment, uniform blanking and smooth feeding of the chain grate.)

1. The utility model provides a pressure touch type arc motion control system, its characterized in that includes interconnect's detecting element, on-the-spot instrument box and engineer station, swing belt converter, on-the-spot instrument box include resistance signal isolation changer and DC power supply, engineer station include switch and PLC system, the PLC system with swing belt converter be connected,

the detection unit comprises a rolling wheel arranged below the swing belt and swinging along with the belt, a detection arc line taking the center of rotation circle of the belt below the swing belt as the center of circle, and a pressure touch unit arranged at the end points of a plurality of short arc lines on the detection arc line, wherein the pressure touch unit is connected with the resistance signal isolation transmitter, and the resistance signal isolation transmitter is connected with the PLC system.

2. The pressure activated arcuate motion control system as defined in claim 1, wherein each pressure activated unit includes a mechanical pressure activated device and a resistor connected in parallel with the mechanical pressure activated device.

3. A pressure activated arc motion control system according to claim 2 wherein the electrical resistance in parallel with said mechanical pressure activated device at both ends of the stroke is 500 ohms and the electrical resistance in parallel with said mechanical pressure activated device during the stroke is 100 ohms.

4. The system of claim 2, wherein said mechanical pressure activated arcuate motion control device comprises a housing, a support structure disposed within said housing, a bottom circuit board disposed at the bottom of said support structure, a top pressure pad disposed at the top of said support structure, a drum contact disposed within said support structure, and a return spring disposed between said drum contact.

5. The pressure-activated arc motion control system as claimed in claim 1, wherein the detection arc is a detection arc disposed in a forward direction of material advance, the detection arc is divided into 26 short arcs each having a length of 10cm, and the pressure triggering unit is disposed at an end point of each short arc.

Technical Field

The invention belongs to the technical field of accurate position measurement and control of a swinging belt, and particularly relates to a pressure touch type arc motion control system.

Background

In the pelletizing production process, the drying grate receives the green pellets on the wide belt, and the green pellets of the wide belt are provided by the swinging belt, so the distribution condition of the swinging belt on the wide belt directly influences the uniformity of materials on the drying grate, indirectly influences the production quality of the pellets, and is very important for detecting and controlling the running position and the speed of the swinging belt.

The traditional swing belt position detection mode is that a linear displacement device is used for simulating a swing radian approximately, the precision is low, the programming control in a computer system is complex, the loss of a wire drawing device is large, and meanwhile, a worker is easy to trip due to thin drawn wires, and certain danger is caused.

Disclosure of Invention

The invention aims to develop a pressure touch type arc motion control system with low cost and high precision, which can effectively eliminate the influence of unnecessary interference on detection.

The purpose of the invention is realized by the following technical scheme:

the pressure touch type arc motion control system is characterized by comprising a detection unit, a field instrument box, an engineer station and a swing belt frequency converter which are connected with each other, wherein the field instrument box comprises a resistance signal isolation transmitter and a direct current power supply, the engineer station comprises an exchanger and a PLC system, the PLC system is connected with the swing belt frequency converter,

the detection unit comprises a rolling wheel arranged below the swing belt and swinging along with the belt, a detection arc line taking the center of rotation circle of the belt below the swing belt as the center of circle, and a pressure touch unit arranged at the end points of a plurality of short arc lines on the detection arc line, wherein the pressure touch unit is connected with the resistance signal isolation transmitter, and the resistance signal isolation transmitter is connected with the PLC system.

Each pressure touch unit comprises a mechanical pressure touch device and a resistor connected with the mechanical pressure touch device in parallel.

The resistance parallel to the mechanical pressure actuation means at both ends of the stroke is 500 ohms and the resistance parallel to the mechanical pressure actuation means within the stroke is 100 ohms.

The mechanical pressure touch device comprises a shell, a supporting structure arranged in the shell, a bottom circuit structure plate arranged at the bottom of the supporting structure, a top pressure rubber pad arranged at the top of the supporting structure, a I-shaped contact piece arranged in the supporting structure and a return spring arranged between the I-shaped contact pieces.

The detection arc line is arranged in the forward direction of the material, the detection arc line is divided into 26 short arcs with the single length of 10cm, and the pressure touch unit is arranged at the end point of each short arc.

The invention has the advantages that:

the pressure touch type arc motion control system is low in cost and high in precision, under the condition that detection and control precision conditions are met, an arc is divided into 26 short arcs and 10cm in single length, a mechanical pressure touch device with a unique structure is designed at the end point of each small arc, a rolling wheel swinging along with a belt is arranged below a swinging belt, the rolling wheel can continuously touch the pressure touch device on the track of the arc below along with the swinging of the belt and transmits the converted signals to an upper computer system, the upper computer calculates the swinging speed in each arc by recording the interval time of each contact signal, and performs feedback control on the running speed of each arc section through a frequency converter, and finally the optimization of the running speed in each arc section is realized after adjustment, so that the uniform blanking of a wide belt and the smooth feeding of a chain grate machine are realized.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view of the invention from direction a of fig. 1.

FIG. 3 is a diagram of a short arc segment sensing module according to the present invention.

Fig. 4 is a measurement schematic diagram of the present invention.

FIG. 5 is a schematic diagram of the system detection control of the present invention.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

As shown in fig. 1-5, the pressure-activated arc motion control system of the present invention is characterized in that it comprises a detection unit, a field instrument box, an engineer station and a swing belt frequency converter, which are connected with each other, the field instrument box comprises a resistance signal isolation transmitter and a dc power supply, the engineer station comprises a switch and a PLC system, the PLC system is connected with the swing belt frequency converter,

the detection unit comprises a rolling wheel 3 arranged below the swing belt 1 and swinging along with the belt, a detection arc 2 taking the center of rotation circle of the belt below the swing belt 1 as the center of circle, and a pressure touch unit arranged at the end points of a plurality of short arc lines on the detection arc 2, wherein the pressure touch unit is connected with the resistance signal isolation transmitter, and the resistance signal isolation transmitter is connected with the PLC system.

Each pressure activated unit comprises a mechanical pressure activated device 4 and a resistor 5 connected in parallel with the mechanical pressure activated device 4.

The resistance 5 parallel to the mechanical pressure actuation means 4 at both ends of the stroke is 500 ohms and the resistance 5 parallel to the mechanical pressure actuation means 4 within the stroke is 100 ohms.

Said mechanical pressure activated device 4 comprises a housing, a support structure 4-2 arranged in the housing, a bottom circuit structure plate 4-6 arranged at the bottom of the support structure 4-2, a top pressure rubber mat 4-4 arranged at the top of the support structure, a drum contact 4-1 arranged inside the support structure, and a return spring 4-3 arranged between the drum contact.

The detection arc line 2 is arranged in the forward direction of the material, the detection arc line 2 is divided into 26 short arcs with the single length of 10cm, and the pressure touch unit is arranged at the end point of each short arc.

According to the invention, under the condition of meeting the detection and control precision, a detection arc line 2 with the length of about 2.6 meters is arranged below a swing belt 1 by taking the center of a rotating circle of the belt as the center of a circle and 3.5m as the radius, the forward direction of the material is provided with the detection arc line 2, the detection arc line 2 is divided into 26 short arcs with the single length of 10cm, a pressure touch unit with a unique structure is arranged at the end point of each small arc line, a mechanical pressure touch device 4 in the pressure touch unit is connected with a 100-ohm resistor 5 in parallel, the resistance values of the resistors 5 at two ends of a stroke are 500 ohms for distinguishing the end points, and the devices are connected in series after being connected in parallel to form. Set up the rolling wheel 3 along with the belt wobbling below the swing belt 1, along with the swing of swing belt 1, the rolling wheel 3 can be intermittent touches the mechanical type pressure touch device 4 on the 2 trails of below detection pitch arc to change the resistance change signal into 4-20mA signal transmission to the PLC system, the PLC system is through the interval time of recording every contact signal, calculate the swing speed in every short pitch arc, and carry out feedback control to speed through the converter, realize the optimization of operating speed in each segmental arc after final regulation, and then realize the even unloading of wide belt and the smooth feeding of chain grate.

The mechanical pressure touch device 4 is connected in parallel with a resistor 5 with the resistance value of 100 ohms, the mechanical pressure touch device 4 is in a normally closed state, namely, the resistance value of a small parallel circuit is 0 ohm under the normal condition, and when the mechanical pressure touch device 4 is opened under the pressure of the rolling wheel 3, the resistance value in the circuit is changed into 100 ohms. 26 small parallel circuits are connected in series to form an arc-shaped detection chain with the length of 26m, the distance of each parallel circuit is 10cm, namely the distance between every two adjacent small parallel circuits is controlled by speed.

The mechanical pressure touch device 4 is composed of an I-shaped contact piece 4-1, a return spring 4-3, a top pressed rubber pad 4-4, a bottom circuit structure plate 4-6, a supporting structure 4-2 and a shell. When the top part is pressed by the pressing rubber pad 4-4 and is pressed by the rolling wheel 3 which swings, the I-shaped contact sheet 4-1 overcomes the jacking force of the reset spring 4-3, the embedded copper sheet 4-5 at the bottom of the I-shaped contact sheet 4-1 is pressed to be separated from the circuit, the circuit is opened, and the resistance value of the resistor 5 of the circuit is changed into 100 ohm or 500 ohm of the parallel resistor. Meanwhile, the supporting structure can prevent the top pressed rubber mat 4-4 from driving the false operation of the peripheral touch unit.

The swing rolling wheel 3 is fixed below the swing belt 1 and rotates along a fixed track with the radius of 3.5 meters, and accurately presses above the corresponding mechanical pressure touch device 4 below.

The detected resistance value signal is converted into a 4-20mA standard signal through a signal isolation transmitter and is fed into a PLC system, the PLC system calculates the speed of each section of the route according to the time of recording each node, monitoring, recording and speed control of the PLC system are realized through frequency conversion adjustment of the speed, and uniform distribution is finally realized.