阅读说明：本技术 一种矩阵式多功能信号隔离变送器 (Matrix type multifunctional signal isolation transmitter ) 是由 赵明 于 2019-10-09 设计创作，主要内容包括：本发明涉及一种矩阵式多功能信号隔离变送器,属于信号隔离传输技术领域。本发明包括信号隔离采集单元阵列、内部数字信号隔离单元阵列和信号隔离转换单元阵列；信号隔离采集单元负责采集模拟输入信号并转换成数字值并提供外部隔离数字通信接口；信号隔离转换单元负责根据数字值生成模拟输出信号并提供外部隔离数字通信接口；内部数字信号隔离单元阵列负责各信号隔离采集单元和各信号隔离转换单元的内部隔离通信。本发明所述的矩阵式多功能信号隔离变送器可实现输入信号到输出信号的点对点传输、点对多点传输、多点对点传输和多点对多点传输,且可实现无需独立供电电源便可正常工作,其电路结构简单,易于集成,便于生产。(The invention relates to a matrix type multifunctional signal isolation transmitter, belonging to the technical field of signal isolation transmission. The invention comprises a signal isolation acquisition unit array, an internal digital signal isolation unit array and a signal isolation conversion unit array; the signal isolation acquisition unit is used for acquiring an analog input signal, converting the analog input signal into a digital value and providing an external isolation digital communication interface; the signal isolation conversion unit is used for generating an analog output signal according to the digital value and providing an external isolation digital communication interface; the internal digital signal isolation unit array is responsible for internal isolation communication of each signal isolation acquisition unit and each signal isolation conversion unit. The matrix type multifunctional signal isolation transmitter can realize point-to-point transmission, point-to-multipoint transmission, multipoint-to-point transmission and multipoint-to-multipoint transmission from an input signal to an output signal, can normally work without an independent power supply, and has the advantages of simple circuit structure, easy integration and convenient production.)

1. A matrix type multifunctional signal isolation transmitter comprises a signal isolation acquisition unit array, and is characterized by also comprising an internal digital signal isolation unit array and a signal isolation conversion unit array;

the signal isolation acquisition unit array consists of k signal isolation acquisition units, the internal digital signal isolation unit array consists of m internal digital signal isolation units, and the signal isolation conversion unit array consists of n signal isolation conversion units;

the k, m and n are positive integers;

the signal isolation acquisition unit is responsible for converting an analog current signal output by source equipment into a corresponding digital signal and performing data interaction with digital signal equipment, other signal isolation acquisition units and signal isolation conversion units inside, the internal digital signal isolation unit array is responsible for isolating digital communication among the signal isolation acquisition unit array and any element of each signal isolation conversion unit array, and the signal isolation conversion unit is responsible for performing data interaction with the digital signal equipment, other signal isolation acquisition units inside and the signal isolation conversion units and converting the corresponding digital signal in interaction data into a corresponding analog current signal and transmitting the corresponding analog current signal to target equipment;

the source device refers to a device for transmitting data through an analog current signal;

the digital signal equipment is equipment for performing data interaction with the signal isolation acquisition unit or the signal isolation conversion unit through a digital signal;

the target device refers to a device that receives an analog current signal;

the analog current signal refers to a direct current signal.

2. The matrix multi-functional signal isolation transmitter of claim 1, wherein said signal isolation collection unit comprises at least 1 pair of current input ports, 1 set of isolation digital communication ports and 1 set of non-isolation digital communication ports, said internal digital signal isolation unit comprises 1 set of digital communication ports a communicating with the signal isolation collection unit and 1 set of digital communication ports b communicating with the signal isolation conversion unit, said signal isolation conversion unit comprises 1 power input port, 1 current output port, 1 set of isolation digital communication ports and 1 set of non-isolation digital communication ports.

3. The matrix multi-functional signal isolation transmitter of claim 2, wherein the first connection mode among the signal isolation collection unit array, the internal digital signal isolation unit array and the signal isolation conversion unit array is: the current input port of the signal isolation acquisition unit is connected to the current output port of the corresponding source equipment, and the isolation digital communication port group is respectively connected with the ports in the corresponding digital communication port group of the corresponding digital signal equipment in a one-to-one correspondence manner; the non-isolated digital communication port group of the first element in the signal isolation acquisition unit array is respectively connected with the ports in the digital communication port group A of all the elements in the internal digital signal isolation unit array in a one-to-one corresponding manner, and the non-isolated digital communication port groups of other elements are respectively connected with the ports in the digital communication port group B of the corresponding internal digital signal isolation unit in a one-to-one corresponding manner; the power input port of the signal isolation conversion unit is connected to the power anode output end of the corresponding target device, the current output port is connected to the analog signal input end of the corresponding target device, the isolation digital communication port group is respectively connected with the corresponding digital communication port group of the corresponding digital signal device in a one-to-one correspondence manner, and the non-isolation digital communication port group is respectively connected with the ports in the digital communication port group B of the corresponding internal digital signal isolation unit in a one-to-one correspondence manner.

4. The matrix multi-functional signal isolation transmitter of claim 3, wherein the relationship between the number of elements in the signal isolation collection unit array, the internal digital signal isolation unit array and the signal isolation conversion unit array is: m = n + k-1.

5. The matrix multi-functional signal isolation transmitter of claim 2, wherein the second connection mode among the signal isolation collection unit array, the internal digital signal isolation unit array and the signal isolation conversion unit array is: the current input port of the signal isolation acquisition unit is connected to the current output port of the corresponding source equipment, and the isolation digital communication port group is connected to the corresponding digital communication port group of the corresponding digital signal equipment; the power input port of the signal isolation conversion unit is connected to the power anode output end of corresponding target equipment, the current output port is connected to the analog signal input end of the corresponding target equipment, and the isolation digital communication port group is connected to the corresponding digital communication port group of the corresponding digital signal equipment; elements in the signal isolation acquisition unit array and the signal isolation conversion unit array are respectively cascaded through corresponding internal digital signal isolation units by using non-isolated digital communication port groups, and finally a ring-shaped cascade structure is formed.

6. The matrix multi-functional signal isolation transmitter of claim 5, wherein the number of elements in the signal isolation collection unit array, the internal digital signal isolation unit array and the signal isolation conversion unit array is related to: m = n + k.

7. The matrix multi-functional signal isolation transmitter of claim 4 or 6, wherein the minimum normal operating current of said signal isolation collection unit is not greater than the minimum value of its measurement range, and the maximum withstand current is not less than the maximum value of its measurement range.

8. The matrix multi-functional signal isolation transmitter of claim 7, wherein the minimum output current of the signal isolation and conversion unit is the minimum normal operating current of the signal isolation and conversion unit, the maximum output current is the maximum value of the output range thereof, the corresponding power output terminal of the target device should be able to provide the maximum output current required by the signal isolation and conversion unit, and the minimum value of the output range should be no less than the minimum output current of the signal isolation and conversion unit.

Technical Field

Relate to the signal isolation field, concretely relates to multi-functional signal of matrix of rectangular keeps apart changer.

Background

In many industrial fields and laboratories, data transmission among multiple devices is involved, many data with linear rules are transmitted by means of 4 ~ 20mA direct current, and in order to avoid mutual interference between two devices, a 4 ~ 20mA signal isolator is generally used for isolation, however, the following problems generally exist in the signal isolators currently on the market:

1. expensive isolation devices are used, and the price is generally higher;

2. the used isolation circuit is provided with an isolation power supply, and the isolation power supply circuit not only increases the cost, but also occupies a large PCB area, so that the volume of the signal isolator is generally larger and is not beneficial to integration;

3. the function is single, and the application range of the single product is narrow.

Based on the above problems, my patents ZL201821089454.0 and ZL201821089455.5 have given solutions, but the mentioned solutions have the following disadvantages:

1. the output end temperature of the 4 ~ 20mA signal multifunctional isolation transmitter mentioned in the patent ZL201821089454.0 has a narrow application range and a large temperature drift;

2. the patent ZL201821089455.5 is only suitable for the situation of converting an analog signal into a digital signal;

therefore, the invention rebuilds a matrix type multifunctional signal isolation transmitter based on the patent ZL 201821089455.5.

Disclosure of Invention

The invention adopts the following technical scheme for solving the technical problems:

a matrix type multifunctional signal isolation transmitter comprises a signal isolation acquisition unit array, an internal digital signal isolation unit array and a signal isolation conversion unit array.

The signal isolation acquisition unit array is composed of k signal isolation acquisition units, the internal digital signal isolation unit array is composed of m internal digital signal isolation units, and the signal isolation conversion unit array is composed of n signal isolation conversion units.

And k, m and n are positive integers.

The signal isolation acquisition unit is responsible for converting analog current signals output by source equipment into corresponding digital signals and carrying out data interaction with the digital signal equipment, other internal signal isolation acquisition units and signal isolation conversion units, the internal digital signal isolation unit array is responsible for isolating digital communication between the signal isolation acquisition unit array and any element of each signal isolation conversion unit array, and the signal isolation conversion unit is responsible for carrying out data interaction with the digital signal equipment and other internal signal isolation acquisition units or signal isolation conversion units and converting corresponding digital signals in interaction data into corresponding analog current signals and transmitting the analog current signals to target equipment.

The source device refers to a device that transmits data through an analog current signal, as follows.

The digital signal equipment refers to equipment for data interaction with the signal isolation acquisition unit or the signal isolation conversion unit through digital signals, and the following steps are carried out.

The target device refers to a device that receives an analog current signal, as follows.

The analog current signal refers to a direct current signal, as follows.

The signal isolation acquisition unit adopts the technical scheme mentioned in patent ZL201821089455.5, and is improved on the basis of the technical scheme as follows:

in the scheme described in patent ZL201821089455.5, a power supply adaptation unit is added, and in the core processing unit described in patent ZL201821089455.5, a set of digital communication interfaces and a PWM output port are added for interfacing with the internal digital signal isolation unit array.

The signal isolation conversion unit is internally provided with a microprocessor and a current detection negative feedback circuit, the microprocessor can operate a temperature compensation algorithm and is assisted with the current detection negative feedback circuit, and the temperature application range and the temperature drift characteristic of a product are greatly improved.

The invention has the advantages of

1) All the advantages of patent ZL201821089454.0 and patent ZL201821089455.5 are possessed;

2) compared with the technical scheme mentioned in the patent ZL201821089454.0, the temperature drift controllability is better;

3) point-to-point isolated transmission, point-to-multipoint isolated transmission, multipoint-to-point isolated transmission and multipoint-to-multipoint isolated transmission from any input interface to any output interface can be realized;

4) the multipoint-to-multipoint and multipoint-to-multipoint transmission modes can realize isolated transmission in various integration modes such as scanning transmission, superposition transmission and the like;

5) wherein the isolated transmission of the analog signal to the digital signal and the digital signal to the analog signal can be performed simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a block diagram 1 illustrating the principle and application of the matrix-type multi-functional signal isolation transmitter according to the present invention;

FIG. 2 is a schematic block diagram and application description block diagram of the matrix type multifunctional signal isolation transmitter of the present invention 2;

FIG. 3: the invention relates to a top layer circuit schematic diagram 1 of a matrix type multifunctional signal isolation transmitter;

FIG. 4: the invention relates to a schematic diagram of a top-layer circuit of a matrix type multifunctional signal isolation transmitter 2;

FIG. 5: the invention is a top-level schematic diagram of a signal isolation acquisition unit modified based on a patent ZL 201821089455.5;

FIG. 6: the invention is a circuit schematic diagram of a core processing unit modified based on a patent ZL 201821089455.5;

FIG. 7: the invention is based on the circuit schematic diagram of the power supply adaptation unit added in patent ZL 201821089455.5;

FIG. 8: the circuit schematic diagram of the internal digital signal isolation unit is shown in the invention;

FIG. 9: the top layer circuit schematic diagram of the signal isolation conversion unit is shown in the invention;

FIG. 10: the invention is a circuit schematic diagram of a digital signal isolation unit in a signal isolation conversion unit;

FIG. 11: the invention is a circuit schematic diagram of a small signal amplifying unit in a signal isolation conversion unit;

FIG. 12: the invention is a circuit schematic diagram of a current regulation voltage stabilization unit in a signal isolation conversion unit;

FIG. 13: the invention is a circuit schematic diagram of a sampling unit in a signal isolation conversion unit;

FIG. 14: the main control flow chart of the signal isolation acquisition unit is shown in the invention;

FIG. 15: the main control flow chart of the signal isolation conversion unit is shown in the invention;

FIG. 16: the main control flow chart of the analog signal output program is shown in the invention;

wherein:

solid-line arrows in fig. 1 and 2 indicate current flow, and dotted-line arrows indicate signal flow;

in fig. 1 and 2, a source device refers to a device that transmits data through an analog current signal, and a target device refers to a device that receives the analog current signal.

Detailed Description

In regard to the detailed description and technical description of the invention, two examples are further described, but it should be understood that these examples are for illustrative purposes only and should not be construed as limiting the practice of the invention.