CN219477965U - Data acquisition transceiver - Google Patents
Data acquisition transceiver Download PDFInfo
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- CN219477965U CN219477965U CN202320206512.8U CN202320206512U CN219477965U CN 219477965 U CN219477965 U CN 219477965U CN 202320206512 U CN202320206512 U CN 202320206512U CN 219477965 U CN219477965 U CN 219477965U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a data acquisition transceiver, comprising: the system comprises a data acquisition module, a main control module and a communication module; the main control module is used for processing the data acquired by the data acquisition module and transmitting the data to the upper computer through the communication module; the data acquisition module comprises: at least two first isolation units, a second isolation unit and a logic conversion unit; the first input end of each first isolation unit is connected with the positive electrode of the sampling signal end, the second input end of each first isolation unit is connected with the negative electrode of the sampling signal end, the first output end of each first isolation unit is connected with the logic conversion unit, the output end of the logic conversion unit is connected with the first input end of the second isolation unit, the first output end of the second isolation unit is connected with the main control module, and the logic conversion unit is used for detecting whether all paths of sampling signals arrive at the same time. The embodiment of the utility model is beneficial to avoiding the detection of redundant sampling signals.
Description
Technical Field
The utility model relates to the field of data acquisition, in particular to a data acquisition transceiver.
Background
With the advancement of intelligent conversion and the development of internet of things, services such as information acquisition, transmission, storage, fusion and use among things are becoming more and more popular. In an industrial data acquisition system, a data acquisition device is generally used for acquiring various parameter data of each equipment PLC host in a workshop.
The existing data acquisition transceiver transmits the acquired multipath sampling signals to the main control module for analysis and decryption restoration after optical coupling isolation, and transmits the multipath sampling signals to the local server or the remote server through the serial port communication circuit.
The existing data acquisition transceiver cannot avoid detecting redundant sampling signals.
Disclosure of Invention
The utility model provides a data acquisition transceiver which is beneficial to avoiding the detection of redundant sampling signals.
The embodiment of the utility model provides a data acquisition transceiver, which comprises: the system comprises a data acquisition module, a main control module and a communication module; the main control module is used for processing the data acquired by the data acquisition module and transmitting the data to the upper computer through the communication module; the data acquisition module comprises: at least two first isolation units, a second isolation unit and a logic conversion unit; the first input end of each first isolation unit is connected with the positive electrode of the sampling signal end, the second input end of each first isolation unit is connected with the negative electrode of the sampling signal end, the first output end of each first isolation unit is connected with the logic conversion unit, and the first isolation units are used for outputting the isolated multipath sampling signals; the output end of the logic conversion unit is connected with the first input end of the second isolation unit, the second input end of the second isolation unit is connected with the first grounding end, the first output end of the second isolation unit is connected with the main control module, and the logic conversion unit is used for detecting whether sampling signals arrive at the same time.
Optionally, the first isolation unit includes a first capacitor, a first resistor, and a first optocoupler isolation chip; the first end of the first capacitor is connected with the positive electrode of the sampling signal end, and the second end of the first capacitor is connected with the negative electrode of the sampling signal end; the first resistor is connected in series between the first end of the first capacitor and the first end of the first optocoupler isolation chip; the first end of the first optocoupler isolation chip is electrically connected with the first input end of the first isolation unit, the second end of the first optocoupler isolation chip is connected with the second input end of the first isolation unit, the third end of the first optocoupler isolation chip is connected with the first output end of the first isolation unit, and the fourth end of the first optocoupler isolation chip is electrically connected with the second output end of the first isolation unit.
Optionally, the logic conversion unit is an and gate.
Optionally, the second isolation unit includes a second resistor, a third resistor, a fourth resistor, and a second optocoupler isolation chip; the second resistor is connected in series between the output end of the logic conversion unit and the first end of the second optocoupler isolation chip; the first end of the third resistor is connected with the fourth end of the second optocoupler isolation chip, and the second end of the third resistor is connected with the first power supply; the first end of the fourth resistor is connected with the third end of the second optocoupler isolation chip, and the second end of the fourth resistor is connected with the second grounding end; the first end of the second optical coupler isolation chip is electrically connected with the first input end of the second isolation unit, the second end of the second optical coupler isolation chip is connected with the second input end of the second isolation unit, the third end of the second optical coupler isolation chip is connected with the first output end of the second isolation unit, and the fourth end of the second optical coupler isolation chip is electrically connected with the second output end of the second isolation unit.
Optionally, the communication module includes: the data receiving and transmitting unit comprises a third isolation unit, a fourth isolation unit and a data receiving and transmitting unit; the data receiving and transmitting unit comprises a data signal input end, a data signal output end, a differential data signal end and a receiving/transmitting direction control end, wherein the data signal input end is connected with the first output end of the fourth isolation unit, the data signal output end is connected with the first input end of the third isolation unit, the receiving/transmitting direction control end is connected with the first output end of the main control module, the differential data signal end is connected with the upper computer, and the data receiving and transmitting unit is used for converting a transmitting signal from the control module into a differential signal and also converting the differential signal into a receiving signal of the control module; the first output end of the third isolation unit is connected with the data receiving signal end of the main control module; the first input end of the fourth isolation unit is connected with the data transmission signal end of the main control module.
Optionally, the data acquisition transceiver further comprises a power conversion module, the input end of the power conversion module is connected with the direct current system, the output end of the power conversion module is connected with the data acquisition module, the main control module and the communication module, and the power conversion module is used for processing and converting the power input by the direct current system so as to supply power for the data acquisition module, the main control module and the communication module.
Optionally, the power conversion module comprises an input power protection unit, an input filtering unit, an output filtering electric unit and a voltage reduction unit which are sequentially connected; the input end of the input power protection unit is connected with the input end of the power conversion module, the output end of the voltage reduction unit is connected with the output end of the power conversion module, and the voltage reduction unit is used for reducing the voltage of a first power supply of the direct current system and then outputting the reduced voltage to the data acquisition module, the main control module and the communication module.
Optionally, the input power protection unit includes a first diode, a fuse, a fifth resistor, a sixth resistor, and a seventh resistor; the anode of the first diode is connected with the input end of the input power supply protection unit, and the cathode of the first diode is connected with the fuse; the first end of the fifth resistor is connected with the power supply positive end of the direct current system, and the second end of the fifth resistor is connected with the power supply negative end of the direct current system; the first end of the sixth resistor is connected with the second end of the fuse, and the second end of the sixth resistor is connected with the second grounding end; the first end of the seventh resistor is connected to the first end of the fifth resistor, and the second end of the seventh resistor is connected to the second ground.
Optionally, the input filter unit includes a second capacitor, a third capacitor and a fourth capacitor; the second capacitor is connected between the positive power supply end and the negative power supply end of the direct current system; the first end of the third capacitor is connected with the positive end of the power supply of the direct current system, and the second end of the third capacitor is connected with the first end of the fourth capacitor; the second end of the fourth capacitor is connected with the power supply negative end of the direct current system.
Optionally, the output filter unit includes a common mode inductor, a fifth capacitor, a sixth capacitor and a seventh capacitor; the first end of the common-mode inductor is connected with the power supply negative end of the direct-current system, the second end of the common-mode inductor is connected with the second end of the fifth capacitor, the third end of the common-mode inductor is connected with the power supply positive end of the direct-current system, and the fourth end of the common-mode inductor is connected with the first end of the fifth capacitor; the first end of the sixth capacitor is connected with the first end of the fifth capacitor, the second end of the sixth capacitor is connected with the first end of the seventh capacitor, and the second end of the seventh capacitor is connected with the second end of the fifth capacitor.
The utility model provides a data transceiver, which comprises a data acquisition module, a main control module and a communication module; the data acquisition module comprises: at least two first isolation units, a second isolation unit and a logic conversion unit; the two-way data exchange with an upper computer, an industrial personal computer, instruments and meters and the like can be realized through the communication module, the two-way data exchange device has wide application in various industrial fields (such as injection molding, stamping, die casting, pouring, die cutting and other different industries) in the field of the Internet of things, and whether all paths of sampling signals arrive simultaneously can be detected by additionally arranging the logic conversion unit, so that the detection of redundant sampling signals is avoided.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a data acquisition transceiver according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of another data collecting and transceiving device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of another data collecting and transceiving device according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of another data collecting and transceiving apparatus according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a power conversion module according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The embodiment of the utility model provides a data acquisition and transmission device which is suitable for the condition of simultaneously acquiring at least two paths of acquired data, such as injection molding, stamping, die casting, pouring, die cutting and the like. Fig. 1 is a schematic structural diagram of a data acquisition transceiver according to an embodiment of the present utility model. As shown in fig. 1, the data acquisition transceiver includes: the device comprises a data acquisition module 10, a main control module 20 and a communication module 30.
The main control module 20 is used for processing the data acquired by the data acquisition module 10 and transmitting the data to the upper computer through the communication module 30; the data acquisition module 10 includes: at least two first isolation units 101 (two first isolation units are exemplarily shown in fig. 1), a second isolation unit 102, and a logic conversion unit 103; the first input end of each first isolation unit 101 is connected with the positive electrode IN+ of the sampling signal end, the second input end of each first isolation unit 101 is connected with the negative electrode IN-of the sampling signal end, the first output end of each first isolation unit 101 is connected with the logic conversion unit 103, and the first isolation units 101 are used for outputting the isolated multipath sampling signals; the output end of the logic conversion unit 103 is connected to the first input end of the second isolation unit 102, the second input end of the second isolation unit 102 is connected to the first ground end 24VG, the first output end of the second isolation unit 102 is connected to the main control module 20, and the logic conversion unit 103 is used for detecting whether each path of sampling signals arrive at the same time.
The circuit structures of the first isolation unit 101 and the second isolation unit 102 may be the same or different. The first isolation unit 101 and the second isolation unit 102 can realize unidirectional transmission of signals, so that electrical isolation between an input end and an output end is completely realized, the output signal has no influence on the input end, the anti-interference capability of the data acquisition transceiver is improved, and the first isolation unit 101 and the second isolation unit 102 can be circuits comprising optical coupling isolation chips.
A second output terminal of the first isolation unit 101 is connected to a second power source VCC2. A second output terminal of the second isolation unit 102 is connected to the first power source VCC1.
The logic conversion unit 103 serves as a trigger, and detection of redundant sampling signals can be avoided by setting a trigger condition. Alternatively, the logic conversion unit 103 may be an and gate.
The main control module 20 may include a single chip microcomputer, and may further include a Digital signal processor (Digital SignalProcessor, DSP) or a field programmable gate array (FieldProgrammableGate Array, FPGA).
The communication module 30 can enable the device to be acquired to exchange data with the upper computer. The communication module 30 may be various modules having a serial communication interface. The communication module may be an RS485 communication module, and may also be an RS232 communication module.
The data acquisition transceiver device of this embodiment can gather two at least signals to only when two at least collection signals exist simultaneously, the result that data acquisition transceiver device output is effective, and only when one signal arrived, the result that data acquisition transceiver device output is invalid. In the prior art, since the multiple sampling signals are not logically converted by the logic conversion unit 103, but are directly input to the main control module 20, the main control module 20 can work as long as one path of sampling signals arrive, but the data acquired at this time is invalid data, so that redundant acquisition signals exist.
The data acquisition transceiver of this embodiment synthesizes at least two paths of sampling signals into one path of signal through the logic conversion unit 103, that is, only when multiple paths of sampling signals arrive at the same time, the main control module 20 can work, so as to trigger the sampling mechanism, which is beneficial to avoiding redundant sampling signals.
With continued reference to fig. 1, the working principle of the data acquisition transceiver provided by the embodiment of the utility model is as follows:
the multi-path sampling signals in the equipment to be acquired are isolated by the first isolation unit 101 and then output to the logic conversion unit 102, the logic conversion unit 102 carries out logic conversion on the acquired multi-path sampling signals, the signals after logic conversion are isolated by the second isolation unit 103 and then output to the main control module 20, namely the sampling signals are isolated by two stages and then output to the main control module 20, and the main control module 20 carries out analysis and decryption restoration processing and sends the signals to an upper computer through the communication module 30. The communication module 30 may also receive the data signal sent by the host computer, and then transmit the data signal to the main control module 20, where the main control module 20 performs processes such as conversion and encryption on the data signal.
The utility model provides a data transceiver, which comprises a data acquisition module, a main control module and a communication module; the data acquisition module comprises: the two-way data exchange with an upper computer, an industrial computer, an instrument and the like can be realized through the communication module, the two-way data exchange device has wide application in various industrial fields (such as injection molding, stamping, die casting, pouring, die cutting and other different industries) in the field of the Internet of things, and whether all paths of sampling signals arrive at the same time can be detected through additionally arranging the logic conversion unit, so that the detection of redundant sampling signals is avoided.
Fig. 2 is a schematic structural diagram of another data collecting and transceiving device according to an embodiment of the present utility model. In this embodiment, as shown in fig. 2, the first isolation unit 101 includes a first capacitor C1, a first resistor R1, and a first optocoupler isolation chip U1.
The first end of the first capacitor C1 is connected with the positive electrode IN+ of the sampling signal end, and the second end of the first capacitor C1 is connected with the negative electrode IN < - >; the first resistor R1 is connected in series between the first end of the first capacitor C1 and the first end of the first optocoupler isolation chip U1; the first end of the first optocoupler isolation chip U1 is electrically connected with the first input end of the first isolation unit 101, the second end of the first optocoupler isolation chip U1 is connected with the second input end of the first isolation unit 101, the third end of the first optocoupler isolation chip U1 is connected with the first output end of the first isolation unit 101, and the fourth end of the first optocoupler isolation chip U1 is electrically connected with the second output end of the first isolation unit 101.
Specifically, the first optocoupler isolation chip U1 is composed of a light emitting device and a photosensitive device, and when an electric signal is applied to an input end to make the light emitting device emit light, the photosensitive device is sensitized to generate a photocurrent, so that conversion between 'electricity-light-electricity' is realized. The first optocoupler isolation chip U1 may be a single channel output transistor coupled chip packaged with SO 4. The model of the first optocoupler isolation chip U1 may be various. Illustratively, the first optocoupler isolation chip U1 may be a PC816, a PC817, a 4N35, a TLP290, or a TLP291.
The first end and the second end of the first optocoupler isolation chip U1 are located on the input side of the first optocoupler isolation chip U1, and the third end and the fourth end of the first optocoupler isolation chip U1 are located on the output side of the first optocoupler isolation chip U1.
The first isolation unit 101 further includes an eighth resistor R8, where the eighth resistor R8 is connected in series between the second power source VCC2 and the fourth terminal of the first optocoupler isolation chip U1. The eighth resistor R8 is used as a current limiting resistor at the fourth end of the first optocoupler isolation chip U1, so as to protect the first optocoupler isolation chip U1.
The logic conversion unit 103 is an and gate. The multi-path sampling signal outputted after being isolated by the first isolation unit 101 may be a low level signal or a high level signal. Illustratively, when the sampling signal is a high level signal, i.e., when all inputs of the logic conversion unit 103 are high level signals, the logic conversion unit 103 output will go high. That is, the logic conversion unit 103 can output the high-level enable master control module 20 only when the logic conversion unit 103 detects that all sampling signals arrive at the same time.
The second isolation unit 102 includes a second resistor R2, a third resistor R3, a fourth resistor R4, and a second optocoupler isolation chip U2.
The second resistor R2 is connected in series between the output end of the logic conversion unit 103 and the first input end of the second optocoupler isolation chip U2; the first end of the third resistor R3 is connected with the fourth end of the second optocoupler isolation chip U2, and the second end of the third resistor R3 is connected with the first power supply VCC1; the first end of the fourth resistor R4 is connected with the third end of the second optocoupler isolation chip U2, and the second end of the fourth resistor R4 is connected with the second grounding end GND; the first end of the second optocoupler isolation chip U2 is electrically connected with the first input end of the second isolation unit 102, the second end of the second optocoupler isolation chip U2 is connected with the second input end of the second isolation unit 102, the third end of the second optocoupler isolation chip U2 is connected with the first output end of the second isolation unit 102, and the fourth end of the second optocoupler isolation chip U2 is electrically connected with the second output end of the second isolation unit 102.
The second optocoupler isolation chip U2 is composed of a light emitting device and a photosensitive device, when an electric signal is added to the input end to enable the light emitting device to emit light, the photosensitive device is sensitized to generate photocurrent, and therefore conversion between 'electricity-light-electricity' is achieved. The second optocoupler isolation chip U2 may be a single channel output transistor coupled chip packaged with SO 4. The model of the second optocoupler isolation chip U2 may be various. Illustratively, the second optocoupler isolation chip U2 may be a PC816, a PC817, a 4N35, a TLP290, or a TLP291.
Fig. 3 is a schematic structural diagram of another data collecting and transceiving device according to an embodiment of the present utility model. The present embodiment is described below with reference to the specific configuration of the communication module 30 based on the above embodiments, but is not limited to the present utility model.
As shown in fig. 3, the main control module 20 includes a first output terminal RD, a data receiving signal terminal RX, and a data transmitting signal terminal TX, and the communication module 30 is connected to the first output terminal RD, the data receiving signal terminal RX, and the data transmitting signal terminal TX of the main control module 20, respectively.
The communication module 30 includes: a third isolation unit 301, a fourth isolation unit 302, and a data transceiving unit 303.
The data transceiver unit 303 includes a data signal input end, a data signal output end, a differential data signal end, and a receiving/transmitting direction control end, where the data signal input end is connected to the first output end of the fourth isolation unit 302, the data signal output end is connected to the first input end of the third isolation unit 301, the receiving/transmitting direction control end is connected to the first output end RD of the main control module 20, the differential data signal end is connected to an upper computer, and the data transceiver unit 303 is used for converting a transmission signal from the control module 20 into a differential signal and also converting the differential signal into a receiving signal of the control module 20.
The first output end of the third isolation unit 301 is connected to the data receiving signal end RX of the main control module 20; the first input end of the fourth isolation unit 302 is connected to the data transmission signal end TX of the main control module 20.
Specifically, the third isolation unit 301 includes a ninth resistor R9, a tenth resistor R10, and a third optocoupler isolation chip U3.
The third optocoupler isolation chip U3 includes a first input terminal, a second input terminal, a first output terminal, a ground terminal, an enable terminal, and a power terminal. The first end of the ninth resistor R9 is connected to the first output end of the third optocoupler isolation chip U3, the second end of the ninth resistor R9 is connected to the power end of the third optocoupler isolation chip U3, and the enabling end and the power end of the third optocoupler isolation chip U3 are both connected to the first power supply VCC1. The tenth resistor R10 is connected in series between the second input terminal of the third optocoupler isolation chip U3 and the second power source VCC2. The ground terminal of the third optocoupler isolation chip U3 is connected to the second ground terminal GND. The first input end of the third optocoupler isolation chip U3 is connected with the first input end of the third isolation unit 301, and the first output end of the third optocoupler isolation chip U3 is connected with the first output end of the third isolation unit 301.
The fourth isolation unit 302 includes an eleventh resistor R11, a twelfth resistor R12, and a fourth optocoupler isolation chip U4.
The fourth optocoupler isolation chip U4 includes a first input terminal, a second input terminal, a first output terminal, a ground terminal, an enable terminal, and a power terminal. The first end of the eleventh resistor R11 is connected to the first power VCC1, and the second end of the eleventh resistor R11 is connected to the second input end of the fourth optocoupler isolation chip U4. The first end of the twelfth resistor R12 is connected with the first output end of the fourth optocoupler isolation chip U4, the second end of the twelfth resistor R12 is connected with the enabling end of the fourth optocoupler isolation chip U4, and the enabling end and the power end of the fourth optocoupler isolation chip U4 are both connected with the second power supply VCC2. The ground terminal of the fourth optocoupler isolation chip U4 is connected to the first ground terminal 24VG. The first input end of the fourth optocoupler isolation chip U4 is connected with the first input end of the fourth isolation unit 302, and the first output end of the fourth optocoupler isolation chip U4 is connected with the first output end of the fourth isolation unit 302.
The data transceiver unit 303 includes a data transceiver chip U5, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighth capacitor C8, a first transient suppression diode TVS1, a second transient suppression diode TVS2, and a third transient suppression diode TVS3.
The data transceiver chip U5 includes a receiving direction control terminal/RE, a transmitting direction control terminal DE, a driving input terminal DI, a receiving output terminal RO, differential signal terminals a and B, a ground terminal GD, and a power supply terminal VC.
The receiving direction control end/RE and the transmitting direction control end DE of the data transceiver chip U5 are connected to the receiving/transmitting direction control end of the data transceiver unit 303, the driving input end DI of the data transceiver chip U5 is connected to the data signal input end of the data transceiver unit 303, the receiving output end RO of the data transceiver chip U5 is connected to the data signal output end of the data transceiver unit 303, and the differential signal ends a and B of the data transceiver chip U5 are connected to the differential data signal end of the data transceiver unit 303.
The first end of the thirteenth resistor R13 is connected with the power end VC of the data transceiver chip U5, and the second end of the thirteenth resistor R13 is connected with the differential signal end A. The first end of the fourteenth resistor R14 is connected to the first ground terminal 24VG, and the second end of the fourteenth resistor R14 is connected to the differential signal terminal B. The fifteenth resistor R15 is connected in series between the differential signal terminal B and the external terminal RS 485-B. The sixteenth resistor R16 is connected in series between the differential signal terminal a and the external terminal RS485-a, and the seventeenth resistor R17 is connected between the differential signal terminal a and the differential signal terminal B. The first end of the eighth capacitor C8 is connected to the second power source VCC2, and the second end of the eighth capacitor C8 is connected to the first ground terminal 24VG. A first end of the first transient suppression diode TVS1 is connected with the first grounding end 24VG, and a second end of the first transient suppression diode TVS1 is connected with the differential signal end B; the second transient suppression diode TVS2 is connected between the differential signal terminal A and the differential signal terminal B; the first end of the third transient suppression diode TVS3 is connected to the differential signal end a, and the second end of the third transient suppression diode TVS3 is connected to the first ground end 24VG.
Fig. 4 is a schematic structural diagram of another data collecting and transceiving apparatus according to an embodiment of the present utility model. The embodiment is based on the embodiment of fig. 1, as shown in fig. 4, the data collecting and transmitting device further includes a power conversion module 40, an input end of the power conversion module 40 is connected to the dc system 50, an output end of the power conversion module 40 is connected to the data collecting module 10, the main control module 20 and the communication module 30, and the power conversion module 40 is used for processing and converting a power input by the dc system 50 to supply power to the data collecting module 10, the main control module 20 and the communication module 30.
The data acquisition transceiver can be provided with four pilot lamps, namely a power supply pilot lamp, an operation pilot lamp, a receiving pilot lamp and a sending pilot lamp.
Fig. 5 is a schematic structural diagram of a power conversion module according to an embodiment of the present utility model, and as shown in fig. 5, the power conversion module 40 includes an input power protection unit 401, an input filtering unit 402, an output filtering unit 403, and a voltage step-down unit 404, which are sequentially connected.
The input end of the input power protection unit 401 is connected with the input end of the power conversion module 40, the output end of the voltage reduction unit 404 is connected with the output end of the power conversion module 40, and the voltage reduction unit 404 is used for reducing the voltage of the power supply of the direct current system 50 and outputting the reduced voltage to the data acquisition module 10, the main control module 20 and the communication module 30.
The input power protection unit 401 includes a first diode D1, a fuse F1, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7; the anode of the first diode D1 is connected with the input end of the input power supply protection unit 401, and the cathode of the first diode D1 is connected with a fuse; the first end of the fifth resistor R5 is connected with the power positive terminal V+ of the direct current system 50, and the second end of the fifth resistor R5 is connected with the power negative terminal V-of the direct current system; the first end of the sixth resistor R6 is connected to the second end of the fuse F1, and the second end of the sixth resistor R6 is connected to the second ground GND; the first end of the seventh resistor R7 is connected to the first end of the fifth resistor R5, and the second end of the seventh resistor R7 is connected to the second ground GND.
The input filtering unit 402 includes a second capacitor C2, a third capacitor C3, and a fourth capacitor C4; the second capacitor C2 is connected between the positive power supply terminal V+ and the negative power supply terminal V-of the direct current system 50; the first end of the third capacitor C3 is connected with the positive power supply end V+ of the direct current system 50, and the second end of the third capacitor C3 is connected with the first end of the fourth capacitor C4; the second terminal of the fourth capacitor C4 is connected to the negative power supply terminal V-of the dc system 50.
The output filtering unit 403 includes a common mode inductance L1, a fifth capacitance C5, a sixth capacitance C6, and a seventh capacitance C7; the first end of the common-mode inductor L1 is connected with the power supply negative end V-of the direct-current system 50, the second end of the common-mode inductor L1 is connected with the second end of the fifth capacitor C5, the third end of the common-mode inductor L1 is connected with the power supply positive end V+ of the direct-current system 50, and the fourth end of the common-mode inductor L1 is connected with the first end of the fifth capacitor C5; the first end of the sixth capacitor C6 is connected to the first end of the fifth capacitor C5, the second end of the sixth capacitor C6 is connected to the first end of the seventh capacitor C7, and the second end of the seventh capacitor C7 is connected to the second end of the fifth capacitor C5.
The step-down unit 404 includes a first step-down subunit 4041 and a second step-down subunit 4042. An input terminal of the first step-down unit 4041 is connected to the output filter unit 403, and an output terminal of the first step-down unit 4041 is connected to an input terminal of the second step-down unit 4042. The first step-down subunit 4041 is configured to convert the power of the dc system 50 into a first power VCC1 for output, and the second step-down subunit is configured to convert the second power into a second power VCC2 for output.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. A data acquisition transceiver, comprising: the system comprises a data acquisition module, a main control module and a communication module; the main control module is used for processing the data acquired by the data acquisition module and transmitting the data to the upper computer through the communication module;
the data acquisition module comprises: at least two first isolation units, a second isolation unit and a logic conversion unit;
the first input end of each first isolation unit is connected with the positive electrode of the sampling signal end, the second input end of each first isolation unit is connected with the negative electrode of the sampling signal end, the first output end of each first isolation unit is connected with the logic conversion unit, and the first isolation unit is used for outputting the isolated multipath sampling signals;
the output end of the logic conversion unit is connected with the first input end of the second isolation unit, the second input end of the second isolation unit is connected with the first grounding end, the first output end of the second isolation unit is connected with the main control module, and the logic conversion unit is used for detecting whether sampling signals arrive at the same time or not.
2. The data acquisition transceiver of claim 1, wherein the first isolation unit includes a first capacitor, a first resistor, and a first optocoupler isolation chip;
the first end of the first capacitor is connected with the positive electrode of the sampling signal end, and the second end of the first capacitor is connected with the negative electrode of the sampling signal end;
the first resistor is connected in series between the first end of the first capacitor and the first end of the first optocoupler isolation chip;
the first end of the first optocoupler isolation chip is electrically connected with the first input end of the first isolation unit, the second end of the first optocoupler isolation chip is connected with the second input end of the first isolation unit, the third end of the first optocoupler isolation chip is connected with the first output end of the first isolation unit, and the fourth end of the first optocoupler isolation chip is electrically connected with the second output end of the first isolation unit.
3. The data acquisition transceiver of claim 1, wherein the logic conversion unit is an and gate.
4. The data acquisition transceiver of claim 1, wherein the second isolation unit includes a second resistor, a third resistor, a fourth resistor, and a second optocoupler isolation chip;
the second resistor is connected in series between the output end of the logic conversion unit and the first end of the second optocoupler isolation chip;
the first end of the third resistor is connected with the fourth end of the second optocoupler isolation chip, and the second end of the third resistor is connected with a first power supply;
the first end of the fourth resistor is connected with the third end of the second optocoupler isolation chip, and the second end of the fourth resistor is connected with the second grounding end;
the first end of the second optocoupler isolation chip is electrically connected with the first input end of the second isolation unit, the second end of the second optocoupler isolation chip is connected with the second input end of the second isolation unit, the third end of the second optocoupler isolation chip is connected with the first output end of the second isolation unit, and the fourth end of the second optocoupler isolation chip is electrically connected with the second output end of the second isolation unit.
5. The data acquisition transceiver of claim 1, characterized in that the communication module comprises: the data receiving and transmitting unit comprises a third isolation unit, a fourth isolation unit and a data receiving and transmitting unit;
the data receiving and transmitting unit comprises a data signal input end, a data signal output end, a differential data signal end and a receiving/transmitting direction control end, wherein the data signal input end is connected with the first output end of the fourth isolation unit, the data signal output end is connected with the first input end of the third isolation unit, the receiving/transmitting direction control end is connected with the first output end of the main control module, the differential data signal end is connected with the upper computer, and the data receiving and transmitting unit is used for converting a transmitting signal from the control module into a differential signal and also converting the differential signal into a receiving signal of the control module;
the first output end of the third isolation unit is connected with the data receiving signal end of the main control module; the first input end of the fourth isolation unit is connected with the data transmission signal end of the main control module.
6. The data acquisition transceiver of claim 1, further comprising a power conversion module, wherein an input end of the power conversion module is connected to a direct current system, an output end of the power conversion module is connected to the data acquisition module, the main control module and the communication module, and the power conversion module is used for processing and converting a power input by the direct current system to supply power to the data acquisition module, the main control module and the communication module.
7. The data acquisition transceiver of claim 6, wherein the power conversion module includes an input power protection unit, an input filtering unit, an output filtering unit, and a step-down unit connected in sequence;
the input end of the input power supply protection unit is connected with the input end of the power supply conversion module, the output end of the voltage reduction unit is connected with the output end of the power supply conversion module, and the voltage reduction unit is used for reducing the voltage of the power supply of the direct current system and outputting the reduced voltage to the data acquisition module, the main control module and the communication module.
8. The data acquisition transceiver of claim 7, wherein the input power protection unit includes a first diode, a fuse, a fifth resistor, a sixth resistor, and a seventh resistor;
the anode of the first diode is connected with the input end of the input power supply protection unit, and the cathode of the first diode is connected with the fuse;
the first end of the fifth resistor is connected with the positive power end of the direct current system, and the second end of the fifth resistor is connected with the negative power end of the direct current system;
the first end of the sixth resistor is connected with the second end of the fuse, and the second end of the sixth resistor is connected with the second grounding end; the first end of the seventh resistor is connected to the first end of the fifth resistor, and the second end of the seventh resistor is connected to the second ground.
9. The data acquisition transceiver of claim 7, wherein the input filter unit includes a second capacitor, a third capacitor, and a fourth capacitor;
the second capacitor is connected between a power positive terminal and a power negative terminal of the direct current system; the first end of the third capacitor is connected with the positive power supply end of the direct current system, and the second end of the third capacitor is connected with the first end of the fourth capacitor; and the second end of the fourth capacitor is connected with the power negative end of the direct current system.
10. The data acquisition transceiver of claim 7, wherein the output filter unit includes a common-mode inductance, a fifth capacitance, a sixth capacitance, and a seventh capacitance;
the first end of the common-mode inductor is connected with the power supply negative end of the direct-current system, the second end of the common-mode inductor is connected with the second end of the fifth capacitor, the third end of the common-mode inductor is connected with the power supply positive end of the direct-current system, and the fourth end of the common-mode inductor is connected with the first end of the fifth capacitor;
the first end of the sixth capacitor is connected with the first end of the fifth capacitor, the second end of the sixth capacitor is connected with the first end of the seventh capacitor, and the second end of the seventh capacitor is connected with the second end of the fifth capacitor.
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