CN219349370U - Multi-loop comprehensive measurement and control device - Google Patents

Abstract

The utility model relates to a multi-loop comprehensive measurement and control device, which comprises a circuit board positioned in an outer shell, wherein a microcontroller and a plurality of interface pieces are arranged on the circuit board, each interface piece comprises two input ports, the two ports of each interface piece are respectively connected to a communication port of the microcontroller after passing through an isolation circuit, one port of each interface piece is electrically connected together, one half of the interface pieces are positively connected to the microcontroller through two output ends after passing through the isolation circuit, and the other half of the interface pieces are reversely connected to the microcontroller through two output ends after passing through the isolation circuit. The multi-loop comprehensive measurement and control device can be applied to high-current occasions.

Description

Multi-loop comprehensive measurement and control device

Technical Field

The utility model relates to a multi-loop comprehensive measurement and control device, and belongs to the technical field of electric power.

Background

At present, in industries such as submerged arc furnaces, a measurement and control device is required to measure a plurality of loops of electrical equipment and monitor parameters, so that switching on and off are controlled through specific logic, and in order to improve the integration level of the measurement and control device, a multi-loop integrated comprehensive measurement and control device is generally adopted to measure and monitor power parameters on a plurality of routes simultaneously. Therefore, the measurement and control device needs to be provided with a plurality of groups of interface circuits to be matched with the number of required loops, two output ends of a mutual inductor of each loop are respectively connected with two input ends of each group of interfaces during wiring, and the two input ends are in one-to-one correspondence during wiring, otherwise, inaccurate measurement is caused. However, in actual operation, the situation that the connection is not corresponding often occurs, so that the monitoring data is invalid, therefore, enterprises begin to consider combining multiple groups of interfaces, namely, one input end of each group of interfaces is connected to a bus, so that after one of two output ends of a mutual inductor is sequentially inserted into one input end of the interface during each connection, the other output end is randomly inserted into any one of the ports connected together, and the connection operation is simplified. However, in practical applications, it has been found that the above-described method simplifies the wiring method, but the common terminal current is large after the multiple circuits share one bus, and therefore the method is not suitable for high-current applications. For this reason, there is a need for corresponding improvements to match the high current applications in the industry of submerged arc furnaces and the like.

Disclosure of Invention

The utility model aims to overcome the defects and provide the multi-loop comprehensive measurement and control device which can be applied to high-current occasions and has smaller volume through an integrated structure.

The purpose of the utility model is realized in the following way:

the utility model provides a measurement and control device is synthesized to multicircuit, includes the circuit board that is located the shell body, is provided with microcontroller and a plurality of interface piece on the circuit board, and every interface piece includes two input ports, and two ports of every interface piece are connected to microcontroller's ADC input port after isolating circuit respectively, and the port electricity is in the same place all the way of a plurality of interface pieces, and half interface piece is through two output forward access microcontroller behind the isolating circuit, and half interface piece is through two output reverse access microcontroller behind the isolating circuit.

Preferably, the isolation circuit comprises a transformer, two input ends of the transformer are respectively connected with two paths of ports of the interface piece, the output end of the transformer outputs two output ends after passing through the filter circuit, namely an output end I and an output end II, one half of the output ends I and the output ends II of the isolation circuit are directly connected to the microcontroller, and the other half of the output ends I and the output ends II of the isolation circuit are connected to the microcontroller after crossing.

Preferably, the plurality of interface pieces are integrated into a junction box, one port of the plurality of interface pieces is divided into two groups and is respectively arranged at two ends of the junction box, and the other port of the plurality of interface pieces is positioned in the middle of the junction box so as to be convenient for centralized connection.

The utility model relates to a multi-loop comprehensive measurement and control process, which comprises the following steps: the primary transformers are respectively sleeved on the multiple loops to be tested, one half of the multiple primary transformers are positively sleeved, the other half of the multiple primary transformers are reversely sleeved, one of two output ends of all the primary transformers is respectively connected to a corresponding wiring port, the other output ends of all the primary transformers are connected to wiring ports combined together, the transformers are divided into two groups of forward and reverse sleeved structures, so that induced currents of the multiple primary transformers are mutually offset on the wiring ports combined and connected, and the current value is reduced; meanwhile, the measuring signals input by the primary transformer in the forward direction are input into the microcontroller after passing through the isolating circuit, and the measuring signals input by the primary transformer in the reverse direction are input into the microcontroller after passing through the isolating circuit in the cross and reverse direction, so that the signals are overturned again to ensure the accuracy of measurement. Namely: namely: for the interface part of the multi-loop comprehensive measurement and control device, a secondary transformer is correspondingly used for secondary isolation. And corresponding to the external forward sleeving loop, we adopt internal positive connection; meanwhile, the reverse connection is adopted by the external reverse sleeving, so that the accuracy of measuring the multifunctional electric quantity is ensured while the current reduction of the wiring is ensured.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, when the interface piece is connected for convenient insertion, the cascaded currents are mutually offset by the external reverse mutual inductor, so that the total current value is reduced, and the method is beneficial to being applied to high-current monitoring occasions; meanwhile, after the internal input, the signals which are reversely input are reversely connected again, so that the multipath signals are still connected into the microcontroller for processing by the same phase, and the monitoring precision and accuracy are ensured. Meanwhile, the ports are electrically connected into a whole, the signal flow direction is ensured through the cross wiring mode, the measurement of multiple paths of loops to be measured can be realized without adding additional electric devices, and compared with the traditional single-loop measurement, the integrated mechanism has smaller volume and is beneficial to improving the application range.

Drawings

FIG. 1 is a diagram of an electrical circuit of a multi-circuit integrated measurement and control device according to the present utility model.

Fig. 2 is a schematic diagram of a main loop of a multi-loop integrated measurement and control device according to the present utility model (in the figure, electrical marks are marked at the end of a line, and corresponding electrical marks are connected ends, which are estimated to be a whole circuit schematic diagram, and are not a plurality of independent circuit schematic diagrams).

Fig. 3 and fig. 4 are circuit diagrams of six isolation circuits in a multi-loop integrated measurement and control device according to the present utility model.

Fig. 5 and 6 are circuit diagrams of two groups of microcontrollers in a multi-loop integrated measurement and control device according to the present utility model.

Description of the embodiments

Referring to fig. 1-6, the multi-loop integrated measurement and control device provided by the utility model comprises a circuit board positioned in an outer shell, wherein two groups of microcontrollers are arranged on the circuit board, the model of the microcontroller is RN7302, and each group of microcontrollers respectively receives signals provided by three loops and can simultaneously receive six loops in total.

Six sets of interface elements are embedded on the panel of the outer shell, such as interface element one (I1 x, ICOM 1), interface element two (I2 x, ICOM 2), interface element three (I3 x, ICOM 3), interface element four (I4 x, ICOM 4), interface element five (I5 x, ICOM 5) and interface element six (I6 x, ICOM 6) shown in fig. 1; and six groups of interface components are all inserted and mounted on the circuit board, meanwhile, the ICOM1, ICOM2, ICOM3, ICOM4, ICOM5 and ICOM6 terminals of the six groups of interface components are connected together, can be connected together through copper foil wiring on the circuit board, can also be welded and connected together after being close to each other through physical layout, and two ports of each group of interface components are respectively connected with a communication port of a microcontroller through an isolation circuit. The isolation circuit comprises a secondary transformer and an amplitude limiting low-pass filter circuit, and the induced current generated by the output end of the primary transformer after passing through the secondary transformer is filtered by the amplitude limiting low-pass filter circuit and then input into the microcontroller. The secondary transformer is a high-precision miniature current transformer, and the model of the secondary transformer is ZEMCT131; the limiting low pass filter circuit is formed by a high frequency switching diode, which is model 4148.

In order to match a portable plug-in matching structure formed by connecting terminals of an interface component together, current generated after six groups of loops are converged by primary transformers is required to be reduced, and at the moment, the adjacent primary transformers are reversely connected with each other, namely, as shown in figure 1, CT2, CT3, CT4, CT5 and CT6 serving as primary transformers are sleeved on cables of the loop to be tested in a forward direction, CT2, CT4 and CT6 are sleeved on the cables of the loop to be tested in a reverse direction, so that current phases of input interface components of the adjacent primary transformers are different by 180 degrees, and at the moment, after the six terminals of the interface components are combined together, adjacent reverse currents are mutually offset, so that the total current value on the current is greatly reduced, and the current transformer can be safely and reliably applied to a large-flow environment.

In addition, as CT2, CT4 and CT6 are correspondingly matched, in order to ensure the accuracy of the monitoring value, when the six paths of isolation circuits of the current value of the primary transformer led in by the interface part are output, namely the first path (IAN, LAP), the third path (ICN, LCP) and the fifth path (IB 2N, LB P) are directly input into the corresponding ports of the microcontroller, and the other paths are reversely connected to form the second path (IBP, LBN), the fourth path (IA 2P, LA N) and the sixth path (IC 2P, LC 2N) and then are input into the corresponding ports of the microcontroller, so that the phase of three paths of signals is turned 180 degrees again when the data current after passing through the isolation circuits is input, and the phase of the six paths of signals is ensured to be the same.

Further, in order to facilitate customer connection, the physical implementation structure of the six interface pieces is redesigned, the six interface pieces are integrated into a junction box, the junction box is embedded on the outer shell, 12 junction terminals are arranged in the junction box, that is, 12 terminals (I1, ICOM 1), (I2, ICOM 2), (I3, ICOM 3), (I4, ICOM 4), (I5, ICOM 5) and (I6, ICOM 6) forming the six interface pieces, and the terminals (I1, I2, I3) and (I4, I5, I6) are respectively arranged at two ends in the junction box, and the terminals (ICOM 1, ICOM2, ICOM3, ICOM4, ICOM5, ICOM 6) are positioned in the middle of the junction box, that is, the six terminals (ICOM 1, ICOM2, ICOM3, ICOM4, ICOM5, ICOM 6) are positioned at two sides of the junction box, i.e. the two terminals (I1, ICOM2, ICOM4, ICOM5, ICOM 6) are positioned at two sides of the junction box, I4, I6, I4, I6 are respectively arranged at two sides of the junction box, so that the two groups of terminals (I1, I2, I6) are conveniently aligned together by the two groups of terminals (I1, I2, I5, I6, I5, and I6), and the connection is convenient.

When in wiring operation, an operator can conveniently operate even without looking at the junction box, only one output line of the six primary transformers is inserted at the six terminals at the two ends respectively, and the other output line is immediately inserted into any one of the six terminals (ICOM 1, ICOM2, ICOM3, ICOM4, ICOM5 and ICOM 6), so that the difficulty of wiring operation is greatly simplified.

The following is a specific description with reference to fig. 2 to 6:

i1 and ICOM1 of the first interface are connected to Ia1 and Ia1 of the first isolation circuit, respectively;

interface parts II 2 and ICOM2 are respectively connected to Ib1 and IB1 of the second isolation circuit;

interface elements tri 3 and ICOM3 are connected to Ic1 and Ic1 of the third isolation circuit, respectively;

interface parts IV I4 and ICOM4 are respectively connected to Ia2 and IA2 of the fourth isolation circuit;

the interface parts five I5 and ICOM5 are respectively connected to Ib2 and Ib2 of the fifth isolation circuit;

interface parts six I6 and ICOM6 are respectively connected to Ic2 and Ic2 of the sixth isolation circuit;

the first isolation circuit, the second isolation circuit, the third isolation circuit, the fourth isolation circuit, the fifth isolation circuit and the sixth isolation circuit have identical circuit structures, and the isolation circuits are collectively described below:

the isolation circuit comprises a secondary transformer, the input ends of the secondary transformer are the (Ia 1 x and Ia 1) (Ib 1 x and Ib 1) (Ic 1 x and Ic 1) (Ia 2 x and Ia 2) (Ib 2 x and Ib 2) and (Ic 2 x and Ic 2), namely a pin 1 and a pin 2 of the ZEMCT131 type transformer, two high-frequency switching diodes are connected between two output ends of the secondary transformer, the two output ends of the secondary transformer are respectively grounded and filtered through an RC filter circuit, and meanwhile, the two output ends of the secondary transformer are respectively connected with the microcontroller as output ends; specifically, the method comprises the following steps:

the output of the No. 3 pin of the secondary transformer of the first isolation circuit is used as an output end IAP, and the output of the No. 4 pin is used as an output end IAN;

the No. 3 pin output of the secondary transformer of the second isolation circuit is used as an output end IBN, and the No. 4 pin output is used as an output end IBP;

the No. 3 pin output of the secondary transformer of the third isolation circuit is used as an output end ICP, and the No. 4 pin output is used as an output end ICN;

the No. 3 pin output of the secondary transformer of the fourth isolation circuit is used as an output end IA2N, and the No. 4 pin output is used as an output end IA2P;

the No. 3 pin output of the secondary transformer of the fifth isolation circuit is used as an output end IB2P, and the No. 4 pin output is used as an output end IB2N;

the No. 3 pin output of the secondary transformer of the sixth isolation circuit is used as an output end IC2N, and the No. 4 pin output is used as an output end IC2P;

thus realizing the reverse connection of adjacent output ends, namely half of the output ends are connected positively and half of the output ends are connected reversely;

subsequently, IAP and IAN of the first isolation circuit, IBN and IBP of the second isolation circuit, ICP and ICN of the third isolation circuit are respectively input into 1 pin and 2 pin, 5 pin and 4 pin, and 7 pin and 8 pin of the first microcontroller U1;

IA2N and IA2P of the fourth isolation circuit, IB2P and IB2N of the fifth isolation circuit, and IC2N and IC2P of the sixth isolation circuit are input to pins 2 and 1, pins 4 and 5, and pins 8 and 7, respectively, of the second microcontroller U2.

The output signals after the above-described isolation circuits are received by the first microcontroller U1 (1, 2, 4, 5, 7, and 8) and the second microcontroller U2 (1, 2, 4, 5, 7, and 8).

In addition: it should be noted that the above embodiment is only one of the optimization schemes of this patent, and any modification or improvement made by those skilled in the art according to the above concepts is within the scope of this patent.

Claims (3)

1. The utility model provides a measurement and control device is synthesized to multicircuit, includes the circuit board that is located the shell body, is provided with microcontroller and a plurality of interface piece on the circuit board, and every interface piece includes two input ports, and two ports of every interface piece are connected to microcontroller's communication port after isolating circuit respectively, its characterized in that:

one path of ports of the plurality of interface pieces are electrically connected together, and half of the interface pieces are connected into the microcontroller in the forward direction through two output ends after passing through the isolation circuit, and the other half of the interface pieces are connected into the microcontroller in the reverse direction through two output ends after passing through the isolation circuit.

2. The multi-loop integrated measurement and control device according to claim 1, wherein: the isolation circuit comprises a mutual inductor, two input ends of the mutual inductor are respectively connected with two paths of ports of the interface piece, the output end of the mutual inductor outputs two output ends after passing through the filter circuit, namely an output end I and an output end II, the output end I and the output end II of one half of the isolation circuit are directly connected to the microcontroller, and the output end I and the output end II of the other half of the isolation circuit are connected to the microcontroller after being crossed.

3. The multi-loop integrated measurement and control device according to claim 1 or 2, wherein: the plurality of interface pieces are integrated into a junction box, one port of the plurality of interface pieces is divided into two groups and is respectively arranged at two ends of the junction box, and the other port of the plurality of interface pieces is positioned in the middle of the junction box so as to be convenient for centralized connection.

Images