CN113759799B - Verification circuit and verification device - Google Patents

Verification circuit and verification device Download PDF

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Publication number
CN113759799B
CN113759799B CN202111111038.2A CN202111111038A CN113759799B CN 113759799 B CN113759799 B CN 113759799B CN 202111111038 A CN202111111038 A CN 202111111038A CN 113759799 B CN113759799 B CN 113759799B
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circuit
connection
power supply
interface
relay
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CN113759799A (en
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李作良
高晓霞
米莉艳
张明
李会杰
李超
张佳宇
李志永
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CRRC Tangshan Co Ltd
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CRRC Tangshan Co Ltd
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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
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The embodiment of the application belongs to the field of data acquisition system verification equipment, and particularly relates to a verification circuit and verification equipment. The embodiment of the application aims to solve the problem that the verification efficiency of the data acquisition system is reduced due to the fact that the wiring times are large in the related technology. The verification circuit comprises an interface conversion circuit and a circuit connection circuit; the first connecting end of the interface conversion circuit is connected with the data acquisition board, and the second connecting end of the interface conversion circuit is provided with a first connecting group corresponding to the acquisition channels one by one; the third connecting end of the circuit connecting circuit is provided with a second connecting group which corresponds to the first connecting group one by one; the fourth connection end of the line connection circuit is provided with a third interface connected with the standard variable resistor, and the line connection circuit is used for connecting each second interface in the second connection group with the corresponding third interface. The verification circuit can verify the acquisition channels simultaneously without repeated wiring, reduces wiring times and improves verification efficiency.

Description

Verification circuit and verification device
Technical Field
The embodiment of the application belongs to the field of data acquisition system verification equipment, and particularly relates to a verification circuit and verification equipment.
Background
When testing the static strength and fatigue strength of large structural members of railway carriages, such as bogies, car bodies and the like, a data acquisition system with a plurality of acquisition channels is required to be used, and the data acquisition system acquires signals of strain gauges mounted on the large structural members through the acquisition channels. To ensure the accuracy of the test, the data acquisition system needs to be checked periodically.
In the related art, the data acquisition system comprises a plurality of data acquisition boards, wherein each data acquisition board is provided with a plurality of acquisition channels, and each acquisition channel is provided with a plurality of signal wires; when the calibration is performed, the signal lines of each acquisition channel are required to be connected with the signal lines corresponding to the standard variable resistors one by one so as to complete the calibration.
However, when the data acquisition system is verified in the related art, the number of wiring times is large, the wiring workload is large, time and labor are wasted, and the verification efficiency of the data acquisition system is reduced.
Disclosure of Invention
In view of this, the embodiment of the application provides a calibration circuit and calibration equipment, so as to solve the technical problem that the calibration efficiency of the data acquisition system is reduced due to the large number of wiring times.
In one aspect, an embodiment of the present application provides a verification circuit, including an interface conversion circuit and a circuit connection circuit; the first connecting end of the interface conversion circuit is used for being connected with a data acquisition board card, the data acquisition board card is provided with a first preset number of acquisition channels, and each acquisition channel comprises a second preset number of signal wires; the second connection end of the interface conversion circuit is provided with a first connection group with a first preset number, the first connection group is connected with the acquisition channels in a one-to-one correspondence manner through the first connection end, and each first connection group is provided with a second first interface with a second preset number; the third connection end of the circuit connection circuit is provided with a first preset number of second connection groups, the second connection groups are connected with the first connection groups in one-to-one correspondence, and each second connection group is provided with a third preset number of second interfaces; the fourth connection end of the circuit connection circuit is provided with a third preset number of third interfaces, the circuit connection circuit is used for connecting each second interface in each second connection group with a corresponding third interface, and each third interface is used for being connected with a standard variable resistor.
According to the verification circuit, the first connecting end of the interface conversion circuit is connected with the data acquisition board card, the second connecting end is provided with the first connecting groups of the first preset number, each first connecting group corresponds to one acquisition channel, each first connecting group comprises the first interfaces of the second preset number, and the signal lines of the second preset number in the acquisition channels are connected with the first interfaces in each first connecting group in a one-to-one correspondence mode. The third connection end of the circuit connection circuit is connected with the second connection end of the interface conversion circuit. The third connecting end is provided with a first preset number of second connecting groups, each second connecting group comprises a third preset number of second interfaces, the second preset number of first interfaces in each first connecting group are correspondingly connected with the third preset number of second interfaces in each second connecting group, and therefore each second connecting group is correspondingly connected with one acquisition channel. Each second connection group in the third connection end is correspondingly connected with a fourth connection end, the fourth connection end is connected with a standard variable resistor, the fourth connection end is provided with a third preset number of third interfaces, the standard variable resistor is provided with a third preset number of interfaces, and each third interface is correspondingly connected with each interface of the standard variable resistor one by one.
The signal wire of the standard variable resistor is correspondingly connected with each second connection group through a fourth connection end, is connected with each first connection group through each second connection group, and is then connected with each acquisition channel in the data acquisition board card through each first connection group. That is, each signal line of the standard variable resistor is correspondingly connected with each signal line in the first preset number of acquisition channels. During verification, the first preset number of acquisition channels in the data acquisition board card can be verified at the same time, signal wires of the standard variable resistors are not required to be repeatedly connected into the acquisition channels of the data acquisition board card one by one, wiring times are reduced, and verification efficiency of the data acquisition system is improved.
In some other embodiments, which may include the above embodiments, the line connection circuit further includes a first preset number of relay groups, each of the relay groups having a third preset number of sub-relays, each of the sub-relays connecting one of the second interfaces and the corresponding third interface.
In some other embodiments, which may include the above embodiments, the line connection circuit further includes a power circuit and a first preset number of first switches, the power circuit being connected to a power terminal of each sub-relay in each of the relay groups; the power supply circuit is also connected with the control end of each sub-relay in the corresponding relay group through each first switch.
In some other embodiments, which may include the above embodiments, the power supply circuit includes an ac power supply circuit, an input terminal of the ac power supply circuit is used to connect to an ac power supply, an output terminal of the ac power supply circuit is connected to a power supply terminal of each sub-relay in each relay group, and an output terminal of the ac power supply circuit is further connected to each of the first switches.
In some other embodiments that may include the foregoing embodiments, the ac power supply circuit includes a transformer and a rectifying circuit, an input terminal of the transformer is used for being connected to an ac power supply, an output terminal of the transformer is connected to an input terminal of the rectifying circuit, the rectifying circuit is used for converting ac power output by the transformer into dc power, an output terminal of the rectifying circuit is connected to a power supply terminal of each sub-relay in each relay group, and an output terminal of the rectifying circuit is further connected to each of the first switches.
In some other embodiments that may include the foregoing embodiments, the power supply circuit further includes a dc power supply circuit, a second switch, and a third switch, where one end of the second switch is connected to the ac power supply circuit, and the other end of the second switch is connected to each of the first switches, and the second switch is used to control on-off between the ac power supply circuit and each of the first switches;
The direct current power supply circuit is connected with the alternating current power supply circuit in parallel, and the positive pole and the negative pole of the direct current power supply circuit are connected with the power supply end of each sub-relay in each relay group; one end of the third switch is connected with the positive electrode of the direct current power supply circuit, the other end of the third switch is connected with the other end of the second switch, and the third switch is used for controlling on-off between the direct current power supply circuit and each first switch.
In some other embodiments, which may include the above embodiments, the dc power supply circuit includes a battery connected in parallel with the ac power supply circuit, and a positive electrode and a negative electrode of the battery are connected to a power supply terminal of each sub-relay in each of the relay groups; the positive pole of the storage battery is connected with one end of the third switch.
In some other embodiments that may include the foregoing embodiments, the second preset number is equal to the third preset number, and the second interfaces are connected in one-to-one correspondence with the third interfaces.
In some other embodiments, which may include the above embodiments, the second preset number is greater than the third preset number, and at least one of the third interfaces is connected to a plurality of the second interfaces.
In another aspect, an embodiment of the present application provides a verification device, including a signal connection line, an interface conversion device, and a line connection device; one end of the signal connecting wire is used for being connected with the data acquisition board, the interface conversion device comprises a first circuit board, the first circuit board is provided with an interface conversion circuit, and the other end of the signal connecting wire is connected with a first connecting end of the interface conversion circuit; the circuit connecting device comprises a shell and a second circuit board, the second circuit board is accommodated in the shell, the second circuit board is provided with a circuit connecting circuit, a third connecting end of the circuit connecting circuit is arranged on the shell, and the third connecting end is connected with a second connecting end of the interface conversion circuit; the fourth connection end of the circuit connection circuit is arranged on the shell.
The verification device in this embodiment of the present application, due to including the above verification circuit, also has the advantages of the above verification circuit, and this embodiment of the present application will not be repeated here.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments of the present application or the description of the prior art, and it is obvious that, in the following description, the drawings are some embodiments of the present application, and that, to one of ordinary skill in the art, other drawings may be obtained according to these drawings without inventive effort.
FIG. 1 is a schematic diagram of a related art data acquisition system;
FIG. 2 is a schematic diagram of a verification circuit according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating connection between an interface conversion circuit and a circuit connection circuit in a verification circuit according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of the connection of a circuit connection circuit to a standard variable resistor in an embodiment of the present application;
FIG. 5 is a schematic diagram of a circuit connection circuit according to an embodiment of the present application;
FIG. 6 is a schematic front view of an interface conversion device in a verification device according to an embodiment of the present application;
FIG. 7 is a right side view of the interface conversion device of FIG. 6;
FIG. 8 is a schematic top view of the interface conversion device of FIG. 6;
FIG. 9 is a schematic perspective view of the interface conversion device in FIG. 6;
FIG. 10 is a schematic diagram of the front view of the circuit connection device of the verification device according to the embodiment of the present application;
FIG. 11 is a right side view of the circuit connection device of FIG. 10;
FIG. 12 is a schematic rear view of the circuit connection device of FIG. 10;
FIG. 13 is a schematic top view of the circuit connection device of FIG. 10;
FIG. 14 is a schematic perspective view of the circuit connection device of FIG. 10;
fig. 15 is an exploded view of the circuit connection device of fig. 14.
Reference numerals illustrate:
100-a data acquisition board card; 101-acquisition channels;
200-interface conversion circuit; 201-a first connection terminal; 202-a second connection terminal;
203-a first connection set;
301-relay group; 302-a power supply circuit; 303-an alternating current power supply circuit;
304-a transformer; 305-a rectifying circuit; 306-a battery;
400-standard variable resistor;
501-interface conversion means; 502-a first circuit board; 503-line connection means;
504-a housing; 505-a housing body; 506-a set of connection holes;
507-first through holes; 508-a second via; 509-a cover;
510-connecting holes; 511-bolts; 512-mounting through holes;
513-a second circuit board; 514-power panel; 515-relay board.
Detailed Description
For large structural members of railway carriages, such as components of bogies, car bodies and the like, static strength and fatigue strength tests are required. When static strength and fatigue strength tests are carried out, load is usually applied to a large structural member by using loading equipment, a strain gauge is connected to a stress test point of the large structural member so as to measure strain of the large structural member, signals of the strain gauge are collected by using a data collection system, then strain values of the large structural member are obtained according to the collected signals, and analysis of static strength and fatigue strength is carried out. In order to ensure the accuracy of the test, the data acquisition system needs to be checked regularly to ensure the accuracy of the data acquired by the acquisition channel in the data acquisition system, and further ensure the accuracy of the test results of the static strength and the fatigue strength.
In the related art, a standard variable resistor is generally used as a standard signal source to verify an acquisition channel of a data acquisition system. Referring to fig. 1, a wheatstone bridge is formed between each acquisition channel 101 of the data acquisition system and a standard variable resistor 400. Illustratively, a standard variable resistorHaving a resistor R inside 1 Resistance R 2 Resistance R 3 And a variable resistor having a resistance value R X Resistance R 1 Resistance R 2 Variable resistor R X And resistance R 3 And the head and the tail are sequentially connected to form a bridge circuit. Resistor R 1 And resistance R 3 With junction A, resistance R between 3 And variable resistor R X With a junction B and a variable resistor R between them X And resistance R 2 With junction C, resistance R between 2 And resistance R 1 With a connection point D therebetween. The standard variable resistor has a signal line L A Signal line L B Signal line L C And signal line L D Signal line L A Signal line L B Signal line L C And signal line L D And the connecting points are respectively connected with the connecting point A, the connecting point B, the connecting point C and the connecting point D in a one-to-one correspondence manner.
Each acquisition channel 101 of the data acquisition system has a signal line L 1 Signal line L 2 Signal line L 3 And signal line L 4 Wherein the signal line L 1 And signal line L 3 Connected to a power supply inside the acquisition channel 101, a signal line L 2 And signal line L 4 And the voltage measuring unit is connected with the voltage measuring unit in the data acquisition system. Signal line L 1 A signal line L connected to a connection point A of the standard variable resistor 400 3 A connection point C to the standard variable resistor 400 to connect the power supply of the acquisition channel interior 101 to the connection point a and the connection point B; signal line L 2 A signal line L connected to a connection point B of the standard variable resistor 400 4 Is connected to the connection point D of the standard variable resistor 400 to connect the voltage measuring unit inside the acquisition channel to the connection point B and the connection point D, and a wheatstone bridge is formed between the acquisition channel 101 of the data acquisition system and the standard variable resistor 400.
When the acquisition channel of the data acquisition system is verified, the signal line L of the standard variable resistor 400 is used for verifying the acquisition channel A Signal line L B Signal line L C And signal line L D Signal line L of acquisition channel 101 1 Signal line L 2 Letter (letter)Number line L 3 And signal line L 4 And the connection is in one-to-one correspondence.
The power supply of the acquisition channel 101 of the data acquisition system passes through the signal line L 1 And signal line L A Is connected to the connection point A through the signal line L 3 And signal line L C To the connection point C, to apply direct current to the standard variable resistor 400, the standard variable resistor 400 can obtain a first resistance value of the variable resistor, and the first resistance value is used as a verification standard value.
Meanwhile, the connection point B in the standard variable resistor 400 passes through the signal line L B And signal line L 2 One end of the voltage measuring unit is connected with the voltage measuring unit; the connection point D passes through the signal line L D And signal line L 4 Is connected to the other end of the voltage measuring unit to measure the voltage value between the connection point B and the connection point D. The data acquisition system can obtain a second resistance value according to the voltage value measured by the voltage measurement unit in the acquisition channel 101, and obtain an error between the second resistance value and the first resistance value as a calibration standard value. If the error meets the requirement, the acquisition channel 101 of the data acquisition system is qualified; if the error does not meet the requirements, the acquisition channel 101 of the data acquisition system fails.
The standard variable resistor also includes two other signal lines L E And L F Signal line L E Connected to the connection point B, the signal line L F Is connected with the connection point D. Each acquisition channel of the data acquisition system further comprises a signal line L 5 And signal line L 6 Signal line L 5 One end of the bridge supply circuit is connected with a signal line L 6 Is connected with the other end of the bridge supply circuit. During verification, signal line L E And signal line L 5 Connected, signal line L F And signal line L 6 And (5) connection. The connection point B of the standard variable resistor 400 passes through the signal line L E And signal line L 5 One end connected to the bridge supply circuit, and a connection point D passing through the signal line L F And signal line L 6 The other end of the bridge supply circuit is connected with the bridge supply circuit so as to further reduce measurement errors and improve measurement accuracy.
When the data acquisition system is verified, the signal wires of the standard variable resistor 400 are required to be connected with the signal wires in one acquisition channel in a one-to-one correspondence manner; after the acquisition channel is calibrated, the other acquisition channel is calibrated, the signal wires of the standard variable resistor 400 are required to be connected with the signal wires in the other acquisition channel in a one-to-one correspondence manner, the wiring times are high, the wiring workload is high, time and labor are wasted, and the calibration efficiency of the data acquisition system is reduced.
The verification circuit is provided with an interface conversion circuit and a circuit connection circuit, and a data acquisition board of the data acquisition system is connected with the circuit connection circuit through the interface conversion circuit; the first connecting end of the interface conversion circuit is connected with the data acquisition board, and the second connecting end of the interface conversion circuit is provided with a first connecting group corresponding to each acquisition channel one by one; the third connection end of the circuit connection circuit is provided with second connection groups which are connected with each first connection group in a one-to-one correspondence manner, the fourth connection end of the circuit connection circuit is provided with third interfaces which are in one-to-one correspondence with a plurality of signals of the standard variable resistor, and the circuit connection circuit is used for connecting each second interface in each second connection group with a corresponding third interface. When the data acquisition system is verified, the first connecting end of the interface conversion circuit is connected to the data acquisition board, the signal wires of the standard variable resistors are connected with the third interfaces in one-to-one correspondence, so that the plurality of acquisition channels of the data acquisition board can be verified, the signal wires of the standard variable resistors 400 are not required to be repeatedly connected into the acquisition channels 101 of the data acquisition board one by one, wiring times are reduced, and verification efficiency of the data acquisition system is improved.
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Referring to fig. 2, 3 and 4, in one aspect, a verification circuit is provided according to an embodiment of the present application, including an interface conversion circuit 200 and a line connection circuit 300; the first connection end 201 of the interface conversion circuit 200 is used for being connected with the data acquisition board 100, the data acquisition board 100 is provided with a first preset number of acquisition channels 101, and each acquisition channel 101 comprises a second preset number of signal wires; the second connection end 202 of the interface conversion circuit 200 is provided with a first connection group 203 with a first preset number, the first connection group 203 is connected with the acquisition channels 101 in a one-to-one correspondence manner through the first connection end 201, and each first connection group 203 is provided with a first interface with a second preset number; the third connection end of the circuit connection circuit 300 is provided with a first preset number of second connection groups, the second connection groups are connected with the first connection groups 203 in a one-to-one correspondence manner, and each second connection group is provided with a third preset number of second interfaces; the fourth connection end of the circuit 300 has a third predetermined number of third interfaces, and the circuit 300 is configured to connect each of the second interfaces with a corresponding one of the third interfaces in each of the second connection groups, and each of the third interfaces is configured to connect with the standard variable resistor 400.
The first connection end 201 of the interface conversion circuit 200 is connected with the data acquisition board 100, the second connection end 202 has a first preset number of first connection groups 203, each first connection group 203 corresponds to one acquisition channel 101, and each first connection group 203 includes a second preset number of first interfaces so as to connect the second preset number of signal lines in the acquisition channel 101 with the first interfaces in each first connection group 203 in a one-to-one correspondence manner. The third connection terminal of the line connection circuit 300 is connected to the second connection terminal 202 of the interface conversion circuit 200. The third connection end is provided with a first preset number of second connection groups, each second connection group comprises a third preset number of second interfaces, and the second preset number of first interfaces in each first connection group 203 are correspondingly connected with the third preset number of second interfaces in each second connection group, so that each second connection group is correspondingly connected with one acquisition channel 101. Each second connection group in the third connection end is correspondingly connected with a fourth connection end, the fourth connection end is connected with the standard variable resistor 400, the fourth connection end is provided with a third preset number of third interfaces, the standard variable resistor 400 is provided with a third preset number of signal lines, and each third interface is connected with each signal line of the standard variable resistor 400 in a one-to-one correspondence mode.
The signal line of the standard variable resistor 400 is correspondingly connected with each second connection group through a fourth connection end, is connected with each first connection group 203 through each second connection group, and is then connected with each acquisition channel 101 in the data acquisition board 100 through each first connection group 203. That is, each signal line of the standard variable resistor 400 is correspondingly connected to each signal line within the first preset number of acquisition channels 101. During verification, the first preset number of the acquisition channels 101 in the data acquisition board 100 can be verified at the same time, the signal wires of the standard variable resistor 400 are not required to be repeatedly connected into the acquisition channels 101 of the data acquisition board one by one, wiring times are reduced, and verification efficiency of a data acquisition system is improved.
In some implementations of the embodiments of the present application, the second preset number may be equal to the third preset number, and the second interfaces are connected in one-to-one correspondence with the third interfaces. Each second interface corresponds to a signal line of one acquisition channel 101, and the signal lines of the standard variable resistor 400 are connected in a one-to-one correspondence with the signal lines in each acquisition channel 101.
It is understood that the second preset number may be greater than the third preset number, and that at least one third interface is connected to the plurality of second interfaces. Each second interface corresponds to a signal line of one acquisition channel 101, and one signal line of the standard variable resistor 400 may be correspondingly connected to a plurality of signal lines in each acquisition channel 101. Illustratively, to improve measurement accuracy, connection point B and connection point D of standard variable resistor 400 need to be repeatedly wired into acquisition channel 101. That is, the third interface corresponding to the connection point B needs to be connected to two second interfaces, and the third interface corresponding to the connection point D needs to be connected to two other second interfaces.
It should be noted that, the first preset number is the number of the acquisition channels 101 in the data acquisition board 100; the second preset number is the number of signal lines included in each acquisition channel 101; the third preset number is the number of signal lines of the standard variable resistor 400. The first preset number, the second preset number and the third preset number may be specifically set according to actual situations. In the following, the embodiment of the present application will be described by taking the first preset number as 4, the second preset number as 6, and the third preset number as 4 as an example, and it will be understood that the first preset number, the second preset number, and the third preset number may also be other values.
The data acquisition board 100 has 4 acquisition channels 101, each acquisition channel 101 has 6 signal lines, and the data acquisition board 100 has data lines with 25-pin serial interfaces, wherein the 25-pin serial interfaces respectively correspond to 24 data signals and 1 grounding signal in the 4 acquisition channels 101.
Referring to fig. 3, the interface conversion circuit 200 includes a first connection terminal 201 and a second connection terminal 202. The first connection end 201 is connected to the data acquisition board 100, and the first connection end 201 is illustratively a 25 pin serial interface to match the interface of the data lines of the data acquisition board 100. The second connection end 202 comprises 4 first connection groups 203, and each first connection group 203 is arranged corresponding to one acquisition channel 101. Each first connection group 203 includes 6 first interfaces, and each first interface is correspondingly connected to one signal line in the corresponding acquisition channel 101.
For example, the first connection group 203 includes a first interface L 11 First interface L 12 First interface L 13 First interface L 14 First interface L 15 And a first interface L 16 Is connected with the signal wires in the first acquisition channel 101 in the data acquisition board 100 in a one-to-one correspondence manner; the second first connection set 203 includes a first interface L 21 First interface L 22 First interface L 23 First interface L 24 First interface L 25 And a first interface L 26 Is connected with signal lines in a second acquisition channel 101 in the data acquisition board 100 in a one-to-one correspondence manner; the third first connection group 203 includes a first interface L 31 First interface L 32 First interface L 33 First interface L 34 First interface L 35 And a first interface L 36 Is connected with the signal wires in the third acquisition channel 101 in the data acquisition board 100 in a one-to-one correspondence manner; the fourth first connection group 203 includes a first interface L 41 First interface L 42 First interface L 43 First interface L 44 First interface L 45 And a first interface L 46 Is connected with the signal lines in the fourth acquisition channel 101 in the data acquisition board 100 in a one-to-one correspondence.
The line connection circuit 300 has a third connection terminal connected to the second connection terminal and a fourth connection terminal connected to the standard variable resistor 400. Referring to fig. 3, the third connection terminal has 4 second connection groups, each of which is connected to the first connection group 203 in a one-to-one correspondence. Each second connection group has 4 second interfaces. For example, a first second connection group has a second interface A 1 Second interface B 1 Second interface C 1 Second interface D 1 The method comprises the steps of carrying out a first treatment on the surface of the The second connection group has a second interface A 2 Second interface B 2 Second interface C 2 Second interface D 2 The method comprises the steps of carrying out a first treatment on the surface of the The third second connection group has a second interface A 3 Second interface B 3 Second interface C3, second interface D 3 The method comprises the steps of carrying out a first treatment on the surface of the The fourth second connection group is provided with a second interface A 4 Second interface B 4 Second interface C 4 Second interface D 4 。
Referring to fig. 4, the fourth connection terminal has 4 third interfaces, for example, a third interface a, a third interface B, a third interface C, and a third interface D. The third interface A, the third interface B, the third interface C and the third interface D are all connected with the signal lines of the standard variable resistor 400 and respectively correspond to the signal lines L connected with the standard variable resistor 400 A Signal line L B Signal line L C And signal line L D 。
Each second interface in each second connection group in the data connection circuit is connected with a corresponding third interface, that is, 4 second interfaces in each second connection group are connected with the standard variable resistor 400 through 4 third interfaces. Illustratively, the correspondence between the first interface, the second interface, and the third interface is shown in table 1.
Figure BDA0003271212450000101
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Figure BDA0003271212450000111
In some implementations of the embodiments of the present application, each second interface in the circuit connection circuit 300 may be directly connected to one third interface in each second connection group, so that the first preset number of acquisition channels 101 in the data acquisition board 100 can be checked at the same time, which reduces the time consumed during the checking, and improves the checking efficiency.
In some other implementations of the embodiments of the present application, referring to fig. 3, fig. 4, and fig. 5, the line connection circuit 300 may further include a first preset number of relay groups 301, each relay group 301 has a third preset number of sub-relays, each sub-relay is connected to a second interface and a corresponding third interface, so that the on-off between the second interface and the corresponding third interface is controlled through each sub-relay, and then the on-off between the collection channel 101 and the fourth connection end may be controlled through each relay group 301. In this way, the on-off of the sub-relays in each relay group 301 can be controlled to control the on-off between each collection channel 101 and the standard variable resistor 400, so as to realize the connection switching between the standard variable resistor 400 and the collection channels 101 with the first preset number, and the collection channels 101 with the first preset number can be checked one by one with the standard variable resistor 400.
Illustratively, the relay group 301 may include a relay module. The relay module is a circuit board integrated with a plurality of relay units and a relay control circuit. The relay module is provided with a power supply end DC+/DC-, and the power supply end DC+/DC-is connected with a power supply to provide power supply input for each relay unit. Each relay unit has a control terminal IN, a common terminal Com, a normally open terminal NO and a normally closed terminal NC. When the direct current input to the control end IN of each relay unit is at a high level, the common end Com of the relay unit is conducted with the normally open end NO; when the direct current input to the control terminal IN of each relay unit is at a low level, the common terminal Com of the relay unit is conducted with the normally closed terminal NC. Therefore, the common terminal Com of the relay unit can be controlled to be connected to and disconnected from the normally open terminal NO, the common terminal Com and the normally closed terminal NC by controlling the high and low levels of the direct current input to the control terminal IN.
For example, referring to fig. 3, the line connection circuit may include a first relay module KA1 and a second relay module KA2. The first relay module KA1 comprises 8 relay units, the 8 relay units are divided into two relay groups 301, and one relay group 301 comprises a relay unit I A Relay unit I B Relay unit I C And a relay unit I D Another relay group 301 includes a relay unit ii A Relay unit II B Relay unit II C And a relay unit II D . The second relay module comprises 8 relay units, the 8 relay units are divided into two relay groups 301, and one relay group 301 comprises a relay unit III A Relay unit III B Relay unit III C Relay unit III D Another relay group 301 includes a relay unit iv A Relay unit IV B Relay unit IV C And a relay unit IV D 。
Relay unit I A Relay unit I B Relay unit I C And a relay unit I D The common end Com of (a) is respectively the second interface a 1 Second interface B 1 Second interface C 1 And a second interface D 1 The method comprises the steps of carrying out a first treatment on the surface of the Relay unit II A Relay unit II B Relay unit II C And a relay unit II D The common end Com of (a) is respectively the second interface a 2 Second interface B 2 Second interface C 2 And a second interface D 2 The method comprises the steps of carrying out a first treatment on the surface of the Relay unit III A Relay unit III B Relay(s)Electrical unit III C Relay unit III D The common end Com of (a) is respectively the second interface a 3 Second interface B 3 Second interface C 3 And a second interface D 3 The method comprises the steps of carrying out a first treatment on the surface of the Relay unit IV A Relay unit IV B Relay unit IV C And a relay unit IV D The common end Com of (a) is respectively the second interface a 4 Second interface B 4 Second interface C 4 And a second interface D 4 。
Third interface A and relay unit I A Relay unit II A Relay unit III A And a relay unit IV A Is connected with the normally open end NO; third interface B and relay unit I B Relay unit II B Relay unit III B And a relay unit IV B Is connected with the normally open end NO; third interface C and relay unit I C Relay unit II C Relay unit III C And a relay unit IV C Is connected with the normally open end NO; third interface D and relay unit I D Relay unit II D Relay unit III D And a relay unit IV D Is connected with the normally open end NO.
When a high level is input to the control end IN of each relay unit, the common end Com of each relay unit is conducted with the normally open end NO, so that the second interface and the third interface corresponding to the relay unit are conducted; when a low level is input to the control end IN of each relay unit, the common end Com of each relay unit is disconnected from the normally open end NO, so that the second interface and the third interface corresponding to the relay unit are disconnected, and thus, the on-off of the second interface and the third interface can be controlled through the direct current level signal input to the control end IN, so that the on-off of the first connection group and the fourth connection end is controlled, and the on-off between the acquisition channel 101 and the standard variable resistor 400 is further controlled.
In some implementations of the embodiments of the present application, referring to fig. 5, the line connection circuit 300 further includes a power circuit 302 and a first preset number of first switches K1, the power circuit 302 is connected to the power terminals dc+/DC-of the sub-relays in each relay group 301, and the power circuit 302 is further connected to the control terminal of each sub-relay in the corresponding relay group 301 through each first switch K1. Illustratively, 8 relay units in the first relay module KA1 share one power terminal DC+/DC-, 8 relay units in the second relay module KA2 share one power terminal DC+/DC-, the negative electrode of the power circuit 302 is connected to two power terminals DC-, and the positive electrode of the power circuit 302 is connected to two power terminals DC+. The circuit 300 further includes 4 first switches K1, and the positive electrode of the power supply circuit 302 is connected to the control terminal IN of the relay unit IN one relay group 301 through one first switch K1.
When a first switch K1 is closed, the positive electrode of the power circuit 302 is connected with the control end IN of the relay unit IN the relay group 301 corresponding to the first switch K1, and then the common end Com of the 4 relay units IN the relay group 301 is conducted with the normally open end NO, so that the second connection group corresponding to the relay group 301 is conducted with the fourth connection end, and thus, one acquisition channel 101 is conducted with the standard variable resistor 400, and the acquisition channel 101 can be verified; when the other first switch K1 is closed, the other acquisition channels 101 corresponding to the closed first switch K1 can be conducted with the standard variable resistor 400, and the other acquisition channels 101 can be verified. Therefore, the acquisition channel 101 corresponding to the first switch K1 can be checked by closing the first switch K1, so that the checking convenience is improved.
In some implementations of the embodiments of the present application, referring to fig. 5, the power supply circuit 302 may include an ac power supply circuit 303, where an input terminal of the ac power supply circuit 303 is used to connect to an ac power supply, an output terminal of the ac power supply circuit is connected to a power terminal of each sub-relay in each relay group 301, and an output terminal of the ac power supply circuit 303 is further connected to each first switch K1. Illustratively, the input of the ac power circuit 303 is provided with a power plug that is connectable to 220V ac. The output of the ac power supply circuit 303 is connected to the power supply dc+/DC of the first and second relay modules KA1 and KA2 to supply power to the relay units in the first and second relay modules KA1 and KA 2. The output terminal of the ac power supply circuit 303 is further connected to 4 first switches K1, and the ac power supply circuit 303 may be connected to the control terminal IN of the relay unit corresponding to each first switch K1 through each first switch K1.
Illustratively, the ac power supply circuit 303 includes a transformer 304 and a rectifying circuit 305, an input terminal of the transformer 304 is used for connecting an ac power source, an output terminal of the transformer 304 is connected to an input terminal of the rectifying circuit 305, the rectifying circuit 305 is used for converting the ac power output by the transformer 304 into dc power, an output terminal of the rectifying circuit 305 is connected to a power source terminal of each sub-relay in each relay group 301, and an output terminal of the rectifying circuit 305 is also connected to each first switch K1. The transformer 304 can adjust the voltage of the ac power supply so that the voltage of the ac power supply matches the voltage value required by the relay group 301, and then the current output from the transformer 304 is converted into direct current by the rectifying circuit 305, so that the power can be supplied to the relay group 301 by the ac power supply.
In some other implementations of the embodiments of the present application, referring to fig. 5, the power supply circuit 302 may further include a dc power supply circuit, a second switch K2, and a third switch K3, where one end of the second switch K2 is connected to the ac power supply circuit 303, the other end of the second switch K2 is connected to each first switch K1, and the second switch K2 is used to control on/off between the ac power supply circuit 303 and each first switch K1. The direct current power supply circuit is connected with the alternating current power supply circuit 303 in parallel, and the positive pole and the negative pole of the direct current power supply circuit are connected with the power end of each sub-relay in each relay group; one end of the third switch K3 is connected with the positive electrode of the direct current power supply circuit, the other end of the third switch K3 is connected with the second switch K2, and the third switch K3 is used for controlling on-off between the direct current power supply circuit and each first switch K1. When power is supplied to the relay group 301, the second switch K2 can be turned on to disconnect the connection between the ac power supply circuit and the relay group 301; the third switch K3 is turned off, the direct current power supply circuit is electrified to the relay group 301, an additional connection of an alternating current power supply is not needed, and the use convenience of the checking circuit is improved.
Illustratively, the dc power supply circuit includes a battery 306, the battery 306 is connected in parallel with the ac power supply circuit 303, the positive and negative poles of the battery 306 are connected to the power supply terminal of each sub-relay in each relay group 301, and one terminal of the battery 306 is connected to one terminal of the third switch K3. For example, referring to fig. 5, the battery 306 is connected in parallel to both ends of the rectifying circuit 305, the negative electrode of the battery 306 is DC-connected to the first relay module KA1 and the power source terminal of the first relay module KA1, the positive electrode of the battery 306 is connected to one end of the third switch K3, one end of the second switch K2 is connected to the rectifying circuit 305, and the other end of the third switch K3 is connected to one end of the second switch K2. The second switch K2 is used for controlling the on-off between the rectifying circuit 305 and each first switch K1, and the on-off between the rectifying circuit 305 and the first relay module KA1 and the power supply end dc+ of the first relay module KA 1. The third switch K3 is used for controlling the on/off between the battery 306 and the rectifying circuit 305, and the on/off between the battery 306 and each first switch K1.
In the verification process, the second switch K2 is closed, and when the third switch K3 is opened, power can be supplied to the relay group 301 through an ac power supply; when the second switch K2 is opened and the third switch K3 is closed, power can be supplied to the relay group 301 through the storage battery 306; when the second switch K2 is closed and the third switch K3 is closed, the relay group 301 is energized by the ac power source, and the battery 306 is charged.
A main switch K may be further disposed between the positive electrode of the power circuit 302 and each first switch K1, one end of the main switch K is connected with the positive electrode of the power circuit 302, the other end of the main switch K is connected with each first switch K1, and on-off between the power circuit 302 and each first switch K1 may be controlled through the main switch K.
The working process of the verification circuit in the embodiment of the application is as follows:
first, the first connection terminal 201 of the interface conversion circuit 200 is connected to the data line of the data acquisition board 100, and the signal line L of the standard variable resistor 400 is connected to A Signal line L B Signal line L C And signal line L D The third interface a, the third interface B, the third interface C and the third interface D are sequentially connected to the fourth output end of the circuit connection circuit 300.
Then, the power plug of the ac power supply circuit 303 is plugged into an ac power supply, the main switch K is closed, the second switch K2 is closed, and the third switch K3 is opened to supply power to the relay group 301 through the ac power supply circuit 303; or, the power plug of the ac power supply circuit 303 is plugged into an ac power supply, the total switch K is closed, the second switch K2 is closed, and the third switch K3 is closed, so that power is supplied to the relay group 301 through the ac power supply circuit 303, and the storage battery 306 is charged; or closing the main switch K, opening the second switch K2, and closing the third switch K3 to supply power to the relay group 301 through the dc power supply circuit.
Then, a first switch K1 is closed, the resistance value of the standard variable resistor 400 is set to "0", and then the resistance value of the standard variable resistor 400 is set to a standard resistance value; if the error between the resistance value displayed by the data acquisition system and the standard resistance value is within a preset interval, the acquisition channel 101 corresponding to the first switch K1 meets the verification requirement; if the error between the resistance value displayed by the data acquisition system and the standard resistance value is not within the preset interval, the acquisition channel 101 corresponding to the first switch K1 does not meet the verification requirement.
The above process is repeated to verify the other acquisition channels 101 of the data acquisition board 100.
After the verification of each acquisition channel 101 of the data acquisition board 100 is completed, the first connection end 201 of the interface conversion circuit 200 is connected to another data acquisition board 100 of the data acquisition system, so as to verify each acquisition channel 101 of the other data acquisition board 100.
In another aspect, an embodiment of the present application provides a verification device, including a signal connection line, an interface conversion device, and a line connection device; one end of the signal connection line is used for being connected with the data acquisition board 100; the interface conversion device comprises a first circuit board, wherein the first circuit board is provided with an interface conversion circuit 200, and the other end of the signal connecting wire is connected with a first connecting end 201 of the interface conversion circuit 200; the circuit connecting device comprises a shell and a second circuit board, the second circuit board is accommodated in the shell, the second circuit board is provided with a circuit connecting circuit 300, a third connecting end of the circuit connecting circuit 300 is arranged on the shell, and the third connecting end is connected with a second connecting end of the interface conversion circuit 200; the fourth connection terminal of the circuit connection 300 is disposed on the housing.
The signal connecting wire is used for connecting the interface conversion device and the data acquisition board card. Illustratively, one end of the signal connection line is a first 25-pin serial interface, and the first 25-pin serial interface is matched with the interface of the data acquisition board 100 to connect with the data acquisition board 100. The other end of the signal line is provided as a second 25-pin serial interface, and the second 25-pin serial interface is matched with the first connection end 201 of the interface conversion circuit 200 to be connected with the interface conversion circuit 200. The length of the signal connection line may be set according to the distance between the data acquisition system and the standard variable resistor 400, which is not particularly limited in the embodiment of the present application.
Referring to fig. 6, 7, 8 and 9, the interface conversion device 501 includes a first circuit board 502, and the first circuit board 502 is provided with an interface conversion circuit 200, and a first connection end 201 of the interface conversion circuit 200 protrudes from the first circuit board 502 to connect with an interface of a signal connection wire. The second connection end 202 of the interface conversion circuit 200 protrudes from the first circuit board 502 to connect with the circuit connection device.
The first connection terminal 201 may be a 25 pin serial interface for connection with an interface of a signal connection line, for example. The first connection terminal 201 may be any other interface as long as it can be connected with the interface of the signal connection line in a matching manner. The second connection end 202 may be a terminal block having a first predetermined number of terminal groups, each terminal group having a second predetermined number of terminals.
Referring to fig. 10, 11, 12 and 13, the wire connection device 503 includes a housing 504 and a second circuit board 513, the second circuit board 513 is accommodated in the housing 504, and the housing 504 can protect the second circuit board 513. Illustratively, the second circuit board 513 may include a power board 514 and a relay board 515, the power circuit 302 is disposed on the power board 514, the relay group 301 is disposed on the relay board 515, the power board 514 and the relay board 515 are located in the accommodating space, the relay board 515 is located above the power board 514, and the power board 514 is electrically connected with the relay board 515.
Referring to fig. 14 and 15, the case 504 includes a case body 505 and a cover 509, a receiving space having an opening is formed in the case body 505, and a power supply board 514 and a relay board 515 are located in the receiving space and connected to the case body 505. Illustratively, the power supply board 514 and the relay board 515 may be connected within the housing body 505 by fastening bolts.
As an example, referring to fig. 10, 12 and 14, two connection hole groups 506 are provided on each of the first and second side walls of the case body 505, each connection hole group 506 having a third preset number of first through holes 507, each first through hole 507 being disposed opposite to the common terminal Com of the relay unit on the relay board 515 so that wires connected from the respective connection terminals on the interface conversion device 501 can be inserted through the first through holes 507 to be connected to the common terminal Com of the respective relay units.
The third side wall of the housing body 505 is further provided with a second through hole 508, and the second through hole 508 is opposite to the fourth connection terminal, so that the fourth connection terminal can protrude from the second through hole 508, so as to be connected with each signal line of the standard variable resistor 400.
Connection screw holes are formed in four corners of the case body 505, and connection through holes are formed in four corners of the power supply board 514 and the relay board 515, the connection through holes being opposite to the connection screw holes. The cover 509 is located above the housing body 505, and four corners of the cover 509 are provided with connection holes 510. The line connection device 503 further includes a bolt 511, and the bolt 511 is sequentially inserted into the connection holes 510, the relay board 515, and the connection through hole of the power board 514, and screwed into the connection threaded hole to be connected with the housing body 505, so that the power board 514 and the relay board 515 are accommodated in the housing 504.
The cover 509 is further provided with a plurality of mounting through holes 512, each of the mounting through holes 512 being disposed opposite to a fastening position of the common terminal Com on each of the relay units, respectively, so that a wiring tool, such as a screwdriver or the like, can be inserted from within each of the mounting through holes 512 to the fastening position of the common terminal Com to rotate a connection bolt at the fastening position, thereby connecting the wire inserted from each of the first through holes 507 to the common terminal Com.
The main switch K, each first switch K1, each second switch K2, and each third switch K3 are disposed on the cover 509 and are exposed on the upper surface of the cover 509, so as to facilitate the opening and closing operations of the switches.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (7)

1. The verification circuit is characterized by comprising an interface conversion circuit and a circuit connection circuit; the first connecting end of the interface conversion circuit is used for being connected with a data acquisition board card, the data acquisition board card is provided with a first preset number of acquisition channels, and each acquisition channel comprises a second preset number of signal wires; the second connection end of the interface conversion circuit is provided with a first connection group with a first preset number, the first connection group is connected with the acquisition channels in a one-to-one correspondence manner through the first connection end, and each first connection group is provided with a second first interface with a second preset number;
The third connection end of the circuit connection circuit is provided with a first preset number of second connection groups, the second connection groups are connected with the first connection groups in one-to-one correspondence, and each second connection group is provided with a third preset number of second interfaces; the fourth connection end of the circuit connection circuit is provided with a third preset number of third interfaces, the circuit connection circuit is used for connecting each second interface in each second connection group with a corresponding third interface, and each third interface is used for being connected with a standard variable resistor;
the circuit connection circuit further comprises a first preset number of relay groups, each relay group is provided with a third preset number of sub-relays, and each sub-relay is connected with one second interface and the corresponding third interface;
the circuit connection circuit further comprises a power circuit and a first switch with a first preset number, and the power circuit is connected with the power end of each sub-relay in each relay group; the power supply circuit is also connected with the control end of each sub-relay in the corresponding relay group through each first switch;
The power supply circuit comprises an alternating current power supply circuit, the input end of the alternating current power supply circuit is used for being connected with an alternating current power supply, the output end of the alternating current power supply circuit is connected with the power supply end of each sub-relay in each relay group, and the output end of the alternating current power supply circuit is also connected with each first switch.
2. The verification circuit according to claim 1, wherein the ac power supply circuit includes a transformer and a rectifying circuit, an input terminal of the transformer is used for being connected to an ac power supply, an output terminal of the transformer is connected to an input terminal of the rectifying circuit, the rectifying circuit is used for converting ac power output from the transformer into dc power, an output terminal of the rectifying circuit is connected to a power supply terminal of each sub-relay in each relay group, and an output terminal of the rectifying circuit is further connected to each first switch.
3. The verification circuit of claim 1, wherein the power supply circuit further comprises a direct current power supply circuit, a second switch and a third switch, one end of the second switch is connected with the alternating current power supply circuit, the other end of the second switch is connected with each first switch, and the second switch is used for controlling the on-off between the alternating current power supply circuit and each first switch;
The direct current power supply circuit is connected with the alternating current power supply circuit in parallel, and the positive pole and the negative pole of the direct current power supply circuit are connected with the power supply end of each sub-relay in each relay group; one end of the third switch is connected with the positive electrode of the direct current power supply circuit, the other end of the third switch is connected with the other end of the second switch, and the third switch is used for controlling on-off between the direct current power supply circuit and each first switch.
4. A verification circuit according to claim 3, wherein the dc supply circuit comprises a battery connected in parallel with the ac supply circuit, the positive and negative poles of the battery being connected to the power supply terminals of each sub-relay in each relay group; the positive electrode of the storage battery is also connected with one end of the third switch.
5. The circuit according to any one of claims 1-4, wherein the second preset number is equal to the third preset number, and the second interfaces are connected to the third interfaces in a one-to-one correspondence.
6. The verification circuitry of any one of claims 1-4, wherein said second predetermined number is greater than said third predetermined number, at least one of said third interfaces being coupled to a plurality of said second interfaces.
7. A verification device comprising a verification circuit as claimed in any one of claims 1 to 6, comprising a signal connection line, interface conversion means and line connection means; one end of the signal connecting wire is used for being connected with the data acquisition board, the interface conversion device comprises a first circuit board, the first circuit board is provided with an interface conversion circuit, and the other end of the signal connecting wire is connected with a first connecting end of the interface conversion circuit;
the circuit connecting device comprises a shell and a second circuit board, the second circuit board is accommodated in the shell, the second circuit board is provided with a circuit connecting circuit, a third connecting end of the circuit connecting circuit is arranged on the shell, and the third connecting end is connected with a second connecting end of the interface conversion circuit; the fourth connection end of the circuit connection circuit is arranged on the shell.
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