CN113703368A - Signal isolating device - Google Patents
Signal isolating device Download PDFInfo
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- CN113703368A CN113703368A CN202111002760.2A CN202111002760A CN113703368A CN 113703368 A CN113703368 A CN 113703368A CN 202111002760 A CN202111002760 A CN 202111002760A CN 113703368 A CN113703368 A CN 113703368A
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- 238000002955 isolation Methods 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 238000004458 analytical method Methods 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 230000009977 dual effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
Abstract
The invention provides a signal isolation device, which comprises a plurality of first inverting amplifying circuits; the input ends of the first inverting amplifying circuits are connected with the output end of the monitoring system; the output ends of the first inverting amplifying circuits are respectively connected with a plurality of measuring devices; the measuring device comprises a data online analysis system and a temporary acquisition device. The first inverting amplifying circuits provided by the invention process the output signals of the monitoring system to obtain a plurality of paths of output signals with the same size and opposite directions with the output signals of the monitoring system, and the output signals are respectively transmitted to the measuring devices, so that the interference generated when the devices simultaneously acquire the data of the monitoring system is reduced, the accuracy of data acquisition is improved, and the failure rate of the devices is reduced.
Description
Technical Field
The invention relates to the technical field of data transmission, in particular to a signal isolation device.
Background
In the fields of thermal power generation, hydroelectric power generation and petrochemical industry, a monitoring system consisting of a plurality of sensors and data acquisition devices is often used. In general, a signal interface is reserved in a monitoring system, and a temporary acquisition device is connected to temporarily acquire the output of a field-mounted sensor original signal by a professional. With the development of society, a single monitoring system cannot meet the existing monitoring requirements, and therefore, more and more monitoring systems are also provided with a set of data online analysis system for collecting data of the monitoring system in real time, analyzing and storing the data. However, the online data analysis system may occupy the signal interface of the monitoring system and conflict with the temporary collection device. This situation is typically handled in two ways: (1) only one device is reserved for collecting data. In this way, when the worker is in wiring, the worker temporarily pulls out the signal connecting line between the data online analysis system and the monitoring system, and uses the signal connecting line to connect the temporary acquisition equipment, and at the moment, the data online analysis system is in a non-data acquisition state, belongs to idle equipment, and causes resource waste. (2) The original signal is split in two. The simultaneous data acquisition is realized by adopting a three-way principle and generally using a three-way interface or a circuit board with the three-way principle. Three way interface realization is as shown in fig. 1, interface 2, interface 3 UNICOM and connect monitored control system respectively, online analytic system of data and interim collection equipment, this kind of processing method can make online analytic system of data and interim collection equipment can gather the data that monitored control system exported simultaneously, but the second external device of procedure inserts and can all produce an impact to first external device and monitored control system in the twinkling of an eye, the equipment fault rate has been increased, in addition, 3 interface UNICOMs cause and have data interference between 2 external devices, influence data acquisition's precision, cause the condition of gathering wrong data even.
Disclosure of Invention
The invention aims to provide a signal isolation device which can reduce the interference generated when a plurality of devices simultaneously acquire data of a monitoring system, improve the accuracy of data acquisition and reduce the failure rate of the devices.
In order to achieve the purpose, the invention provides the following scheme:
a signal isolation device comprising:
a plurality of first inverting amplification circuits;
the input ends of the first inverting amplifying circuits are connected with the output end of the monitoring system; the output ends of the first inverting amplifying circuits are respectively connected with a plurality of measuring devices; the measuring equipment comprises a data online analysis system and temporary acquisition equipment.
Optionally, the number of the first inverting amplifying circuits is 2.
Optionally, the apparatus further includes:
a plurality of second inverter circuits;
the plurality of second inverting circuits are respectively arranged between each first inverting amplifying circuit and the measuring device.
Optionally, the number of the second inverting circuits is the same as the number of the first inverting amplifying circuits.
Optionally, the first inverting amplifier circuit specifically includes:
the circuit comprises a first resistor, a second resistor and a first control chip;
a first end of the first resistor is used as an input end of the first inverting amplifying circuit and is connected with an output end of the monitoring system;
the second end of the first resistor is respectively connected with the first end of the second resistor and the negative input end of the first control chip;
the second end of the second resistor is connected with the output end of the first control chip to serve as the output end of the first inverting amplifying circuit to be connected with the second inverting circuit;
the positive input end of the first control chip is grounded.
Optionally, the model of the first control chip is TI-LM 7322.
Optionally, the second inverting amplifier circuit specifically includes:
the third resistor, the fourth resistor and the second control chip;
a first end of the third resistor is used as an input end of the second inverting amplifying circuit and is connected with an output end of the first inverting amplifying circuit;
the second end of the third resistor is respectively connected with the first end of the fourth resistor and the negative input end of the second control chip;
the second end of the fourth resistor and the output end of the second control chip are connected as the output end of the second inverting amplifying circuit and connected with the measuring equipment;
and the positive input end of the second control chip is grounded.
Optionally, the model of the second control chip is TI-LM 7321-Q1.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a signal isolation device, which comprises a plurality of first inverting amplifying circuits; the input ends of the first inverting amplifying circuits are connected with the output end of the monitoring system; the output ends of the first inverting amplifying circuits are respectively connected with a plurality of measuring devices; the measuring device comprises a data online analysis system and a temporary acquisition device. The first inverting amplifying circuits provided by the invention process the output signals of the monitoring system to obtain a plurality of paths of output signals with the same size and opposite directions with the output signals of the monitoring system, and the output signals are respectively transmitted to the measuring devices, so that the interference generated when the devices simultaneously acquire the data of the monitoring system is reduced, the accuracy of data acquisition is improved, and the failure rate of the devices is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments 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 without inventive exercise.
FIG. 1 is a schematic diagram of a signal isolation apparatus in the prior art;
FIG. 2 is a schematic structural diagram of a dual channel signal isolation apparatus according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a dual channel signal isolation circuit according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a first control chip according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second control chip according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a signal isolation device which can reduce the interference generated when a plurality of devices simultaneously acquire data of a monitoring system, improve the accuracy of data acquisition and reduce the failure rate of the devices.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
FIG. 2 is a schematic structural diagram of a dual channel signal isolation apparatus according to an embodiment of the present invention; fig. 3 is a circuit diagram of a dual channel signal isolation circuit according to an embodiment of the present invention, and as shown in fig. 2 to 3, the present invention provides a signal isolation apparatus, including:
a plurality of first inverting amplification circuits;
the input ends of the first inverting amplifying circuits are connected with the output end of the monitoring system; the output ends of the first inverting amplifying circuits are respectively connected with a plurality of measuring devices; the measuring device comprises a data online analysis system and a temporary acquisition device.
Specifically, the number of the first inverting amplifier circuits is 2.
In addition, the signal isolation device provided by the invention further comprises:
a plurality of second inverter circuits;
a plurality of second inverting circuits are respectively disposed between each of the first inverting amplifying circuits and the measuring device.
The number of the second inverting circuits is the same as the number of the first inverting amplifying circuits.
Specifically, the first inverting amplifier circuit specifically includes:
the circuit comprises a first resistor, a second resistor and a first control chip; the first control chip structure is schematically shown in fig. 4.
A first end of the first resistor is used as an input end of the first inverting amplifying circuit and connected with an output end (-INA pin (namely 2 pins) or-INB pin (namely 6 pins)) of the monitoring system;
the second end of the first resistor is respectively connected with the first end of the second resistor and the negative input end of the first control chip;
the second end of the second resistor and the output end of the first control chip are connected as the output end (OUTA pin (namely 1 pin) or OUTB pin (namely 7 pin)) of the first inverting amplifying circuit and connected with the second inverting circuit;
the positive input terminal (+ INA pin (i.e., 3 pins) or + INB pin (i.e., 5 pins)) of the first control chip is grounded.
The model of the first control chip is TI-LM 7322. In addition, V of the first control chip-Pin (i.e. 4 pins) H and V+The pins (namely 8 pins) are not connected with other partsAnd (3) a component.
The second inverting amplifier circuit specifically includes:
the third resistor, the fourth resistor and the second control chip; the second control chip structure is schematically shown in fig. 5.
The first end of the third resistor is used as the input end of the second inverting amplifying circuit and is connected with the output end of the first inverting amplifying circuit;
the second end of the third resistor is respectively connected with the first end of the fourth resistor and the negative input end (-IN pin (namely 2 pins)) of the second control chip;
a second end of the fourth resistor and the output end of the second control chip are connected as the output end (an OUT pin (namely 6 pins)) of the second inverting amplifying circuit and connected with the measuring equipment;
the positive input terminal (+ IN pin (i.e., 3 pin)) of the second controller chip is grounded.
The model of the second control chip is TI-LM 7321-Q1. N \ C pins (namely 1 pin, 5 pin and 8 pin) and V of second control chip-Pin (i.e. 4 pins) H and V+No pin (i.e., 7 pins) is connected to other components.
As shown in fig. 2-3, the signal isolation apparatus provided by the present invention has 3 interfaces, which are interface a, interface B, and interface C, respectively. Interface A is a signal input interface, and interface B and interface C are both signal output interfaces. The original signal is accessed to the interface A, data conversion processing is carried out on the original signal through the U1, the original signal respectively passes through the U2 and the U3, meanwhile, the U2 and the U3 can reversely convert the data into the original signal, and the original signal is output outwards through the interface B and the interface C.
FIG. 3 is a diagram of a dual channel signal isolation circuit according to an embodiment of the present invention, which includes two first inverting amplifiers and two second inverting amplifiers, where both the two first inverting amplifiers are connected to an output terminal of a monitoring system; the output ends of the two first inverting amplifying circuits are respectively connected with the input ends of the two second inverting amplifying circuits; the output ends of the two second inverting amplifying circuits are respectively connected with different measuring devices. In the figure, two first inverting amplification circuits share one first control chip (U1), and two second inverting amplification circuits use two second control chips (U2 or U3) of the same type, respectively.
In FIG. 3, R1And R3The first resistors are respectively arranged in the two first inverting amplifying circuits; r2And R4The two first inverting amplifying circuits are respectively provided with a second resistor; r5And R7The first resistors are respectively arranged in the two second inverting amplifying circuits; r6And R8The second resistors are respectively connected with the second inverting amplifying circuits; vinIs the input end of the first inverting amplifying circuit; vout1And Vout2Two output ends of the two first inverting amplifying circuits respectively; voutBAnd VoutCTwo output ends of the two second inverting amplifying circuits respectively. The pin connections of the resistors and the chip are shown in fig. 3.
The basic parameters of the control chip are shown in table 1.
TABLE 1 control chip basic parameters
The U1 decomposes an original signal into 2 paths of completely independent signals, the U2 and the U3 are used for converting the signals into the original signals and simultaneously isolating interference of external signals to the U1, in the whole view, the interface A can be regarded as a signal isolation end, after the original signals are received by the interface A, the signals are processed through the U1, and the processed signals are subjected to 2 paths of signal simulation output through the U2 and the U3, namely, the signals are output to the interface B and the interface C. Therefore, the original signal can be divided into two independent signals which are completely consistent with the original signal, and each signal can be used for collecting signals by external equipment and is not influenced mutually.
The technical parameters of the signal isolation device of the present invention are shown in table 2:
TABLE 2 technical parameters
| Serial number | Content providing method and | Parameter index | |
| 1 | Type of | Voltage signal | |
| 2 | Voltage range | ± |
|
| 3 | Frequency range | < |
|
| 4 | Peak range | <1000um |
The invention has the greatest advantages that one voltage signal can be divided into two independent signals which are not interfered with each other and are completely consistent with the original voltage signal, the structure is simple, the installation and the maintenance are easy, an external interface is not needed, and because the interface A, the interface B and the interface C are in a one-way transmission mode, the interface A can not be influenced when the interface B and the interface C are externally connected with equipment, namely the external equipment can not influence the original signal. In addition, because the interface B and the interface C are independent, when the interface B and the interface C are used for simultaneously connecting external equipment, no influence is generated between the two external equipment.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A signal isolation apparatus, the apparatus comprising:
a plurality of first inverting amplification circuits;
the input ends of the first inverting amplifying circuits are connected with the output end of the monitoring system; the output ends of the first inverting amplifying circuits are respectively connected with a plurality of measuring devices; the measuring equipment comprises a data online analysis system and temporary acquisition equipment.
2. The signal isolation apparatus of claim 1, wherein the number of the first inverting amplification circuits is 2.
3. The signal isolation device of claim 1, further comprising:
a plurality of second inverter circuits;
the plurality of second inverting circuits are respectively arranged between each first inverting amplifying circuit and the measuring device.
4. The signal isolation apparatus according to claim 3, wherein the number of the second inverting circuits is the same as the number of the first inverting amplification circuits.
5. The signal isolation apparatus of claim 3, wherein the first inverting amplifier circuit specifically comprises:
the circuit comprises a first resistor, a second resistor and a first control chip;
a first end of the first resistor is used as an input end of the first inverting amplifying circuit and is connected with an output end of the monitoring system;
the second end of the first resistor is respectively connected with the first end of the second resistor and the negative input end of the first control chip;
the second end of the second resistor is connected with the output end of the first control chip to serve as the output end of the first inverting amplifying circuit to be connected with the second inverting circuit;
the positive input end of the first control chip is grounded.
6. The signal isolation device of claim 5, wherein the first control chip is of type TI-LM 7322.
7. The signal isolation apparatus of claim 3, wherein the second inverting amplifier circuit specifically comprises:
the third resistor, the fourth resistor and the second control chip;
a first end of the third resistor is used as an input end of the second inverting amplifying circuit and is connected with an output end of the first inverting amplifying circuit;
the second end of the third resistor is respectively connected with the first end of the fourth resistor and the negative input end of the second control chip;
the second end of the fourth resistor and the output end of the second control chip are connected as the output end of the second inverting amplifying circuit and connected with the measuring equipment;
and the positive input end of the second control chip is grounded.
8. The signal isolation device of claim 7, wherein the second control chip is of type TI-LM 7321-Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111002760.2A CN113703368A (en) | 2021-08-30 | 2021-08-30 | Signal isolating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111002760.2A CN113703368A (en) | 2021-08-30 | 2021-08-30 | Signal isolating device |
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| CN113703368A true CN113703368A (en) | 2021-11-26 |
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| CN202111002760.2A Pending CN113703368A (en) | 2021-08-30 | 2021-08-30 | Signal isolating device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095920A (en) * | 2010-12-10 | 2011-06-15 | 上海申瑞电力科技股份有限公司 | Monitoring device for electrical level amplitude of serial communication signal |
| CN203674964U (en) * | 2014-01-16 | 2014-06-25 | 中国长城计算机深圳股份有限公司 | Sampling feedback circuit and power supply circuit |
| CN203838219U (en) * | 2014-04-16 | 2014-09-17 | 航天科工深圳（集团）有限公司 | Isolation detecting device for analog electric signals |
| CN106680602A (en) * | 2017-01-04 | 2017-05-17 | 成都冠禹科技有限公司 | Hall-sensor-based electrostatic field tester |
| CN206671820U (en) * | 2017-03-21 | 2017-11-24 | 广州珠江电信设备制造有限公司 | Monitor board and monitoring system |
| CN107783011A (en) * | 2017-09-19 | 2018-03-09 | 北京三清互联科技有限公司 | A kind of distribution line failure indicator based on wireless self-networking |
| CN110146297A (en) * | 2019-04-30 | 2019-08-20 | 中国航发南方工业有限公司 | Sensor power supply and data acquisition circuit, gas turbo-generator set |
-
2021
- 2021-08-30 CN CN202111002760.2A patent/CN113703368A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095920A (en) * | 2010-12-10 | 2011-06-15 | 上海申瑞电力科技股份有限公司 | Monitoring device for electrical level amplitude of serial communication signal |
| CN203674964U (en) * | 2014-01-16 | 2014-06-25 | 中国长城计算机深圳股份有限公司 | Sampling feedback circuit and power supply circuit |
| CN203838219U (en) * | 2014-04-16 | 2014-09-17 | 航天科工深圳（集团）有限公司 | Isolation detecting device for analog electric signals |
| CN106680602A (en) * | 2017-01-04 | 2017-05-17 | 成都冠禹科技有限公司 | Hall-sensor-based electrostatic field tester |
| CN206671820U (en) * | 2017-03-21 | 2017-11-24 | 广州珠江电信设备制造有限公司 | Monitor board and monitoring system |
| CN107783011A (en) * | 2017-09-19 | 2018-03-09 | 北京三清互联科技有限公司 | A kind of distribution line failure indicator based on wireless self-networking |
| CN110146297A (en) * | 2019-04-30 | 2019-08-20 | 中国航发南方工业有限公司 | Sensor power supply and data acquisition circuit, gas turbo-generator set |
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