CN113759799A - Calibration circuit and calibration equipment - Google Patents

Calibration circuit and calibration equipment Download PDF

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Publication number
CN113759799A
CN113759799A CN202111111038.2A CN202111111038A CN113759799A CN 113759799 A CN113759799 A CN 113759799A CN 202111111038 A CN202111111038 A CN 202111111038A CN 113759799 A CN113759799 A CN 113759799A
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circuit
interface
relay
power supply
switch
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CN202111111038.2A
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CN113759799B (en
Inventor
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 calibration equipment, and particularly relates to a calibration circuit and calibration equipment. The embodiment of the application aims to solve the problem that the checking efficiency of a data acquisition system is reduced due to the fact that the number of wiring times is large in the related technology. The verification circuit of the embodiment of the application comprises an interface conversion circuit and a line connection circuit; the first connecting end of the interface conversion circuit is connected with the data acquisition board card, and the second connecting end of the interface conversion circuit is provided with first connecting groups which correspond to the acquisition channels one by one; the third connecting end of the circuit connecting circuit is provided with a second connecting group which is in one-to-one correspondence with the first connecting group; the fourth connecting end of the line connecting circuit is provided with a third interface connected with the standard variable resistor, and the line connecting circuit connects each second interface in the second connecting group with the corresponding third interface. The calibration circuit of the embodiment of the application can calibrate the acquisition channel at the same time, does not need repeated wiring, reduces the wiring times and improves the calibration efficiency.

Description

Calibration circuit and calibration equipment
Technical Field
The embodiment of the application belongs to the field of data acquisition system calibration equipment, and particularly relates to a calibration circuit and calibration equipment.
Background
When a large structural member of a railway passenger car, such as a bogie, a car body, or the like, is subjected to static strength and fatigue strength tests, a data acquisition system having a plurality of acquisition channels is used, and the data acquisition system acquires signals of strain gauges mounted on the large structural member through the acquisition channels. In order to ensure the accuracy of the test, the data acquisition system needs to be checked regularly.
In the related art, a data acquisition system comprises a plurality of data acquisition board cards, each data acquisition board card is provided with a plurality of acquisition channels, and each acquisition channel is provided with a plurality of signal lines; during verification, the signal lines of each acquisition channel need to be connected with the signal lines corresponding to the standard variable resistors one by one to complete verification.
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, embodiments of the present application provide a calibration circuit and a calibration device to solve the technical problem that the number of connections is large and the calibration efficiency of a data acquisition system is reduced.
In one aspect, an embodiment of the present disclosure provides a calibration circuit, which includes an interface conversion circuit and a line 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 lines; the second connecting ends of the interface conversion circuits are provided with first connecting groups with the first preset number, the first connecting groups are connected with the acquisition channels in a one-to-one correspondence mode through the first connecting ends, and each first connecting group is provided with first interfaces with the second preset number; the third connecting end of the line connecting circuit is provided with a first preset number of second connecting groups, the second connecting groups are connected with the first connecting groups in a one-to-one correspondence mode, and each second connecting group is provided with a third preset number of second interfaces; the fourth connection end of the line connection circuit is provided with a third preset number of third interfaces, the line 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.
In the calibration circuit of the embodiment of the application, the first connection end of the interface conversion circuit is connected with the data acquisition board card, the second connection end is provided with the first connection groups with the first preset number, each first connection group corresponds to one acquisition channel, each first connection group comprises the first interfaces with the second preset number, and the signal lines with the second preset number in the acquisition channels are correspondingly connected with the first interfaces in each first connection group one to one. And the third connecting end of the line connecting circuit is connected with the second connecting 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, and 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, so that each second connecting group is correspondingly connected with one acquisition channel. Each second connection group in the third connection ends is correspondingly connected with the fourth connection ends, the fourth connection ends are connected with the standard variable resistor, the fourth connection ends are provided with third interfaces in a third preset number, the standard variable resistor is provided with the interfaces in the third preset number, and each third interface is correspondingly connected with each interface of the standard variable resistor.
The signal line of the standard variable resistor is correspondingly connected with each second connection group through the fourth connection end, is connected with each first connection group through each second connection group, and is 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 connected to 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 simultaneously, the signal wires of the standard variable resistor are not required to be repeatedly connected into the acquisition channels of the data acquisition board card one by one, the wiring times are reduced, and the 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 has a third preset number of sub-relays, and each of the sub-relays is connected to one of the second interfaces and the corresponding third interface.
In some other embodiments, which may include the above-mentioned embodiments, the line connection circuit further includes a power supply circuit and a first preset number of first switches, the power supply circuit being connected to a power supply terminal of each of the sub-relays in each of the relay groups; the power 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-mentioned embodiments, the power circuit includes an ac power supply circuit, an input terminal of the ac power supply circuit is used for connecting an ac power source, 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 first switch.
In some other embodiments, which may include the above-mentioned embodiments, the ac power supply circuit includes a transformer and a rectifying circuit, an input terminal of the transformer is used for connecting an ac power source, an output terminal of the transformer is connected to an input terminal of the rectifying circuit, the rectifying circuit is used for converting the 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 first switch.
In some other embodiments, which may include the above-mentioned 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 anode and the cathode 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 the on-off between the direct current power supply circuit and each first switch.
In some other embodiments, which may include the above-mentioned embodiments, the dc power supply circuit includes a secondary battery connected in parallel with the ac power supply circuit, and a positive electrode and a negative electrode of the secondary battery are connected to a power supply terminal of each sub-relay in each relay group; and the positive electrode of the storage battery is connected with one end of the third switch.
In some other embodiments that may include the above-mentioned embodiments, 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.
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.
Another aspect of the embodiments of the present application provides a calibration apparatus, which includes 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 card, 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; and a fourth connecting end of the line connecting circuit is arranged on the shell.
The verification device of the embodiment of the present application includes the verification circuit, and therefore the verification device also has the advantages of the verification circuit, which is not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly introduced below, and it is easy to see that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to the drawings without creative efforts for those skilled in the art.
FIG. 1 is a schematic diagram of a data acquisition system in the related art;
FIG. 2 is a schematic diagram of a verification circuit according to an embodiment of the present application;
fig. 3 is a schematic connection diagram of an interface conversion circuit and a line connection circuit in the verification circuit according to the embodiment of the present application;
FIG. 4 is a schematic diagram of the connection between the circuit and the standard variable resistor in the embodiment of the present application;
FIG. 5 is a schematic diagram of a circuit for connecting wires according to an embodiment of the present application;
fig. 6 is a schematic front view of an interface conversion device in the verification apparatus according to the embodiment of the present application;
FIG. 7 is a schematic diagram of a right side view of the interface conversion apparatus in FIG. 6;
FIG. 8 is a schematic top view of the interface conversion apparatus shown in FIG. 6;
fig. 9 is a schematic perspective view of the interface conversion apparatus in fig. 6;
fig. 10 is a schematic front view of a circuit connection device in the verification apparatus according to an embodiment of the present disclosure;
FIG. 11 is a right side view of the circuit connection device of FIG. 10;
FIG. 12 is a 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 perspective view of the circuit connection device of FIG. 10;
fig. 15 is an exploded view of the line connector of fig. 14.
Description of reference numerals:
100-a data acquisition board card; 101-acquisition channel;
200-interface conversion circuit; 201-a first connection end; 202-a second connection end;
203-a first connection set;
301-a relay group; 302-a power supply circuit; 303-ac supply circuit;
304-a transformer; 305-a rectifying circuit; 306-a battery;
400-standard variable resistor;
501-interface conversion device; 502-a first circuit board; 503-line connection means;
504-a housing; 505-a housing body; 506-connecting the hole group;
507-a first via; 508-a second via; 509-a cap;
510-a connection hole; 511-bolt; 512-mounting through holes;
513 — a second circuit board; 514-power panel; 515-relay board.
Detailed Description
For large structural members of a railway passenger car, for example, parts such as a bogie and a car body, static strength and fatigue strength tests are required. When static strength and fatigue strength tests are carried out, loading equipment is generally adopted to apply load to a large structural part, a strain gauge is connected to a stress test point of the large structural part to measure the strain of the large structural part, a signal of the strain gauge is acquired by adopting a data acquisition system, then a strain value of the large structural part is obtained according to the acquired signal, and the static strength and the fatigue strength are analyzed. In order to ensure the accuracy of the test, the data acquisition system needs to be checked regularly to ensure the accuracy of data acquisition by the acquisition channel in the data acquisition system, and further ensure the accuracy of the static strength and fatigue strength test results.
In the related art, a standard variable resistor is usually used as a standard signal source to verify the acquisition channel of the 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 resistor has a resistance R inside it1Resistance R2Resistance R3And a variable resistor having a resistance value of RXResistance R1Resistance R2Variable resistor RXAnd a resistance R3The head and the tail are connected in sequence to form a bridge circuit. Resistance R1And a resistance R3Has a connection point A and a resistor R between3And a variable resistor RXA connection point B and a variable resistor R are arranged between the twoXAnd a resistor R2Has a connection point C and a resistor R between2And a resistor R1With a connection point D in between. The standard variable resistor has a signal line LASignal line LBSignal line LCAnd signal line LDSignal line LASignal line LBSignal line LCAnd signal line LDAnd the connection points are respectively connected with the connection point A, the connection point B, the connection point C and the connection point D in a one-to-one correspondence manner.
Each acquisition channel 101 of the data acquisition system has a signal line L1Signal line L2Signal line L3And signal line L4Wherein the signal line L1And signal line L3Connected to a power supply in the collection channel 101, a signal line L2And signal line L4And the voltage measuring unit is connected with the internal part of the data acquisition system. Signal line L1Connected to the connection point A of the standard variable resistor 400, and a signal line L3Connecting with the connection point C of the standard variable resistor 400 to connect the power supply inside the acquisition channel 101 to the connection point A and the connection point B; signal line L2A signal line L connected to a connection point B of the standard variable resistor 4004And is connected with 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 checking the acquisition channel of the data acquisition system, the signal line L of the standard variable resistor 400 is connectedASignal line LBSignal line LCAnd signal line LDAnd signal line L of collection channel 1011Signal line L2Signal line L3And signal line L4And the connection is in one-to-one correspondence.
Power supply of acquisition channel 101 of data acquisition system passes through signal line L1And signal line LAIs connected to the connection point A through a signal line L3And signal line LCThe standard variable resistor 400 is connected to the connection point C to supply a direct current into the standard variable resistor 400, and 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 LBAnd signal line L2One end connected to the voltage measuring unit; the connection point D passes through the signal line LDAnd signal line L4Is 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 the second resistance value according to the voltage value measured by the voltage measurement unit in the acquisition channel 101, and obtain the error between the second resistance value and the first resistance value as the 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 is not eligibleAnd (4) grid.
Illustratively, the standard variable resistor further includes two other signal lines LEAnd LFSignal line LEA signal line L connected to the connection point BFIs connected with the connection point D. Each acquisition channel of the data acquisition system further comprises a signal line L5And signal line L6Signal line L5A signal line L connected to one end of the bridge circuit6Is connected with the other end of the bridge supply circuit. During verification, the signal line LEAnd signal line L5Connection, signal line LFAnd signal line L6And (4) connecting. The connection point B of the standard variable resistor 400 is connected to the signal line LEAnd signal line L5One end connected to the bridge circuit is connected to the signal line LFAnd signal line L6And the other end of the bridge circuit is connected to further reduce the measurement error and improve the measurement precision.
When the data acquisition system is verified, the signal lines of the standard variable resistor 400 are required to be correspondingly connected with the signal lines in one acquisition channel one by one; after the acquisition channel is verified, another acquisition channel is verified, the signal line of the standard variable resistor 400 needs to be repeatedly connected with the signal line in the other acquisition channel in a one-to-one correspondence manner, the wiring times are large, the wiring workload is large, time and labor are wasted, and the verification efficiency of the data acquisition system is reduced.
The calibration circuit of the embodiment of the application is provided with an interface conversion circuit and a line connection circuit, and a data acquisition board card of a data acquisition system is connected with the line connection circuit through the interface conversion circuit; the first connecting end of the interface conversion circuit is connected with the data acquisition board card, and the second connecting end of the interface conversion circuit is provided with a first connecting group which corresponds to each acquisition channel one by one; the third connecting end of the line connecting circuit is provided with second connecting groups which are connected with the first connecting groups in a one-to-one correspondence mode, the fourth connecting end of the line connecting circuit is provided with third interfaces which are connected with the signals of the standard variable resistor in a one-to-one correspondence mode, and the line connecting circuit is used for connecting each second interface in each second connecting group with one 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 card, and then the signal lines of the standard variable resistor are connected with the third interfaces in a one-to-one correspondence manner, so that the plurality of acquisition channels of the data acquisition board card can be verified, the signal lines of the standard variable resistor 400 do not need to be repeatedly connected into the acquisition channels 101 of the data acquisition board card one by one, the wiring times are reduced, and the verification efficiency of the data acquisition system is improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 2, fig. 3 and fig. 4, in one aspect, an embodiment of the present application provides a verification circuit, which includes 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 connecting with the data acquisition board 100, the data acquisition board 100 has a first preset number of acquisition channels 101, and each acquisition channel 101 includes a second preset number of signal lines; 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 line connection circuit 300 has 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 has a third preset number of second interfaces; the fourth connection terminal of the line connection circuit 300 has a third predetermined number of third interfaces, and the line connection circuit 300 is configured to connect each second interface with a corresponding one of the third interfaces in each second connection group, and each third interface is configured to connect with the standard variable resistor 400.
The first connection end 201 of the interface conversion circuit 200 is connected to the data acquisition board card 100, the second connection end 202 has a first connection group 203 with a first preset number, each first connection group 203 corresponds to one acquisition channel 101, each first connection group 203 includes a first interface with a second preset number, so as to connect signal lines with the second preset number in the acquisition channel 101 and the first interfaces in each first connection group 203 in a one-to-one correspondence manner. The third connection of the line connection circuit 300 is connected to the second connection 202 of the interface converter circuit 200. 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, and the second preset number of first interfaces in each first connecting group 203 are correspondingly connected with the third preset number of second interfaces in each second connecting group, so that each second connecting group is correspondingly connected with one acquisition channel 101. Each second connection group of the third connection terminals is correspondingly connected with the fourth connection terminals, the fourth connection terminals are connected with the standard variable resistor 400, the fourth connection terminals have a third preset number of third interfaces, the standard variable resistor 400 has a third preset number of signal lines, and each third interface is correspondingly connected with each signal line of the standard variable resistor 400.
The signal line of the standard variable resistor 400 is correspondingly connected with each second connection group through the 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 card 100 through each first connection group 203. That is, each signal line of the standard variable resistor 400 is connected to each signal line in 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 simultaneously, and the signal lines 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, so that the wiring times are reduced, and the verification efficiency of the data acquisition system is improved.
In some implementation manners of the embodiment of the application, the second preset number may be equal to a third preset number, and the second interfaces are connected to the third interfaces in a one-to-one correspondence manner. 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 with the signal lines in each acquisition channel 101 in a one-to-one correspondence.
It is understood that the second predetermined number may be greater than a third predetermined number, and at least one third interface is connected to a 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 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 the standard variable resistor 400 need to be repeatedly wired into the 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 the other two 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 can be specifically set according to actual conditions. In the following description, the first preset number is 4, the second preset number is 6, and the third preset number is 4 as an example, and it is understood that the first preset number, the second preset number, and the third preset number may be other numbers.
Illustratively, the data acquisition board 100 has 4 acquisition channels 101, each acquisition channel 101 has 6 signal lines, the data acquisition board 100 has a data line with an interface of 25 pins serial interface, and the 25 pins serial interface respectively corresponds to 24 data signals and 1 ground 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 a 25-pin serial interface, for example, to match with an interface of a data line 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 comprises 6 first interfaces, each first interface being connected to a corresponding signal line in the acquisition channel 101.
For example, the first connection set 203 comprises a first interface L11A first interface L12A first interface L13A first interface L14A first interface L15And a first interface L16The signal lines are connected with the signal lines in the first acquisition channel 101 in the data acquisition board card 100 in a one-to-one correspondence manner; the second first connection set 203 comprises a first interface L21A first interface L22A first interface L23A first interface L24A first interface L25And a first interface L26The signal lines are connected with the signal lines in the second acquisition channel 101 in the data acquisition board card 100 in a one-to-one correspondence manner; the third first connection set 203 comprises a first interface L31A first interface L32A first interface L33A first interface L34A first interface L35And a first interface L36The signal lines are connected with the signal lines in the third acquisition channel 101 in the data acquisition board card 100 in a one-to-one correspondence manner; the fourth first connection group 203 comprises a first interface L41A first interface L42A first interface L43A first interface L44A first interface L45And a first interface L46And are connected with the signal lines in the fourth acquisition channel 101 in the data acquisition board 100 in a one-to-one correspondence manner.
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, the first and second connection groups have a second interface A1A second interface B1A second interface C1A second interface D1(ii) a The second connection group has a second interface A2A second interface B2A second interface C2A second interface D2(ii) a The third second connection group has a second interfaceA3A second interface B3A second interface C3 and a second interface D3(ii) a The fourth second connection group has a second interface A4A second interface B4A second interface C4A second interface D4。
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 line of the standard variable resistor 400, and are respectively correspondingly connected with the signal line L of the standard variable resistor 400ASignal line LBSignal line LCAnd signal line LD。
Each second interface in each second connection group in the data connection circuit is connected to a corresponding third interface, that is, 4 second interfaces in each second connection group are connected to the standard variable resistor 400 through 4 third interfaces. Exemplarily, the correspondence between the first interface, the second interface and the third interface is shown in table 1.
Figure BDA0003271212450000101
Figure BDA0003271212450000111
In some implementation manners of the embodiment of the present application, each second interface in the line 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 simultaneously verified, time consumed in verification is reduced, and verification efficiency is improved.
In some other implementation manners of the embodiment 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, and each sub-relay is connected to one second interface and a corresponding third interface, so that on/off between one second interface and the corresponding third interface is controlled by each sub-relay, and then on/off between one acquisition channel 101 and the fourth connection terminal is controlled by each relay group 301. In this way, the on-off of each acquisition channel 101 and the standard variable resistor 400 can be controlled by controlling the on-off of the sub-relays in each relay group 301, so that the connection between the standard variable resistor 400 and the acquisition channels 101 of the first preset number can be switched, and the acquisition channels 101 of the first preset number and the standard variable resistor 400 can be verified one by one.
Illustratively, the relay bank 301 may include a relay module. The relay module is a circuit board integrating 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 high level, the common end Com of the relay unit is conducted with the normally open end NO; when the dc power input to the control terminal IN of each relay unit is 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 and the common terminal Com and the normally closed terminal NC by controlling the high and low levels of the dc power 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 KA 2. First relay module KA1 includes 8 relay unit, and 8 relay unit divide into two relay unit 301, and a relay unit 301 includes relay unit IARelay unit IBRelay unit ICAnd relay unit IDThe other relay set 301 includes a relay unit IIARelay unit IIBRelay unit IICAnd relay unit IID. The second relay module comprises 8 relay units, each of the 8 relay units is divided into two relay groups 301, and one relay group 301 comprises a relay unit IIIARelay unit IIIBRelay unit IIICAnd relay unit IIIDThe other relay set 301 includes a relay unit IVARelay unit IVBRelay unit IVCAnd relay unit IVD。
Relay unit IARelay unit IBRelay unit ICAnd relay unit IDThe common terminals Com are respectively the second interfaces A1A second interface B1A second interface C1And a second interface D1(ii) a Relay unit IIARelay unit IIBRelay unit IICAnd relay unit IIDThe common terminals Com are respectively the second interfaces A2A second interface B2A second interface C2And a second interface D2(ii) a Relay unit IIIARelay unit IIIBRelay unit IIICAnd relay unit IIIDThe common terminals Com are respectively the second interfaces A3A second interface B3A second interface C3And a second interface D3(ii) a Relay unit IVARelay unit IVBRelay unit IVCAnd relay unit IVDThe common terminals Com are respectively the second interfaces A4A second interface B4A second interface C4And a second interface D4。
Third interface A and relay unit IARelay unit IIARelay unit IIIAAnd relay unit IVAThe normally open end NO connection of; third interface B and relay unit IBRelay unit IIBRelay unit IIIBAnd relay unit IVBThe normally open end NO connection of; third interface C and relay unit ICRelay unit IICRelay unit IIICAnd relay unit IVCThe normally open end NO connection of; third interface D and relay unit IDRelay unit IIDRelay unit IIIDAnd relay unit IVDIs connected to 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 corresponding to the relay unit is conducted with the third interface; 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 a 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 are controlled, and the on-off of the acquisition channel 101 and the standard variable resistor 400 is further controlled.
In some implementations of 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. For example, 8 relay units in the first relay module KA1 share one power supply terminal DC +/DC-, 8 relay units in the second relay module KA2 share one power supply terminal DC +/DC-, the negative pole of the power circuit 302 is connected to two power supply terminals DC-, and the positive pole of the power circuit 302 is connected to two power supply terminals DC +. The line connection 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 to 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 to the normally open end NO, so that the second connection group corresponding to the relay group 301 is conducted to the fourth connection end, so that one acquisition channel 101 is conducted to the standard variable resistor 400, and the acquisition channel 101 can be verified; when the other first switch K1 is closed, the other acquisition channel 101 corresponding to the closed first switch K1 can be turned on with the standard variable resistor 400, and the other acquisition channel 101 can be verified. Therefore, the acquisition channel 101 corresponding to the first switch K1 can be verified by closing a certain first switch K1, and the convenience of verification is improved.
In some implementations of the embodiment of the present application, referring to fig. 5, the power circuit 302 may include an ac power supply circuit 303, an input terminal of the ac power supply circuit 303 is used for connecting an ac power source, an output terminal of the ac power supply circuit is connected to a power supply 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 end of the ac power supply circuit 303 is provided with a power plug, and the power plug can be connected with 220V ac power. The output of the ac power supply circuit 303 is connected to the power supply terminals DC +/DC "of the first and second relay modules KA1, KA2 for supplying power to the relay units in the first and second relay modules KA1, KA 2. The output end of the ac power supply circuit 303 is further connected to the 4 first switches K1, and the ac power supply circuit 303 can be connected to the control end IN of the relay unit corresponding to the 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 with 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 with a power supply terminal of each sub-relay in each relay group 301, and an output terminal of the rectifying circuit 305 is further connected with 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 set 301, and then convert the current output from the transformer 304 into a dc power by the rectifier circuit 305, thereby supplying power to the relay set 301 by the ac power supply.
In some other implementation manners of the embodiment 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 anode and the cathode 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 a third switch K3 is connected with the positive electrode of the direct current supply circuit, the other end of the third switch K3 is connected with a second switch K2, and the third switch K3 is used for controlling the connection and disconnection between the direct current supply circuit and each first switch K1. When power is supplied to the relay set 301, the second switch K2 can be opened to disconnect the connection between the alternating current power supply circuit and the relay set 301; and when the third switch K3 is closed, the direct current power supply circuit is electrified to the relay set 301, an additional alternating current power supply does not need to be connected, and the use convenience of the verification circuit is improved.
Illustratively, the dc power supply circuit includes a storage battery 306, the storage battery 306 is connected in parallel with the ac power supply circuit 303, a positive electrode and a negative electrode of the storage battery 306 are connected to the power supply terminals of each sub-relay in each relay group 301, and one end of the storage battery 306 is connected to one end of the third switch K3. For example, referring to fig. 5, the battery 306 is connected in parallel to both ends of the rectifier circuit 305, the negative electrode of the battery 306 is DC-connected to the power terminals of the first relay module KA1 and the first relay module KA1, the positive electrode of the battery 306 is connected to one end of a third switch K3, one end of a second switch K2 is connected to the rectifier circuit 305, and the other end of the third switch K3 is connected to one end of a second switch K2. The second switch K2 is used to control the on/off between the rectifying circuit 305 and each first switch K1, and between the rectifying circuit 305 and the power terminals DC + of the first relay module KA1 and the first relay module KA 1. The third switch K3 is used to control the on/off between the battery 306 and the rectifying circuit 305, and between the battery 306 and each first switch K1.
In the checking 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 the alternating current power supply; when the second switch K2 is opened and the third switch K3 is closed, the power can be supplied to the relay set 301 through the storage battery 306; when the second switch K2 is closed and the third switch K3 is closed, the relay set 301 may be energized by the ac power source while the battery 306 is charged.
A main switch K can be further arranged between the anode of the power circuit 302 and each first switch K1, one end of the main switch K is connected with the anode of the power circuit 302, the other end of the main switch K is connected with each first switch K1, and the on-off between the power circuit 302 and each first switch K1 can be controlled through the main switch K.
The working process of the checking 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 the data line LASignal line LBSignal line LCAnd signal line LDAnd are connected to the third interface a, the third interface B, the third interface C, and the third interface D of the fourth output terminal of the line connection circuit 300 in sequence.
Then, a power plug of the ac power supply circuit 303 is inserted into the ac power supply, the main switch K is closed, the second switch K2 is closed, and the third switch K3 is opened, so as to supply power to the relay set 301 through the ac power supply circuit 303; or, a power plug of the ac power supply circuit 303 is inserted into the ac power supply, the main switch K is closed, the second switch K2 is closed, and the third switch K3 is closed, so as to supply power to the relay set 301 through the ac power supply circuit 303 and charge the storage battery 306; or the total switch K is closed, the second switch K2 is opened, and the third switch K3 is closed, so that power is supplied to the relay set 301 through the direct current power supply circuit.
Then, a first switch K1 is closed to set the resistance value of the standard variable resistor 400 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 another data acquisition board 100.
Another aspect of the embodiments of the present application provides a calibration apparatus, which includes a signal connection line, an interface conversion device, and a line connection device; one end of the signal connecting line is used for connecting the data acquisition board card 100; the interface conversion device comprises a first circuit board, the first circuit board is provided with an interface conversion circuit 200, and the other end of the signal connecting line 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 line connection circuit 300 is disposed on the housing.
The signal connecting line 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 an interface of the data acquisition board 100 so as to be connected with the data acquisition board 100. The other end of the signal line is set 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 so as 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 apparatus 501 includes a first circuit board 502, the first circuit board 502 is provided with the interface conversion circuit 200, and the first connection end 201 of the interface conversion circuit 200 protrudes out of the first circuit board 502 to interface with the signal connection line. The second connection terminal 202 of the interface conversion circuit 200 protrudes from the first circuit board 502 to connect with a line connection device.
Illustratively, the first connection terminal 201 may be a 25-pin serial interface to interface with a signal connection line. The first connection end 201 may also be an interface of other forms 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 sets, each terminal set having a second predetermined number of terminals.
Referring to fig. 10, 11, 12 and 13, the circuit connecting 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. For example, 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 set 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 and the relay board 515 are electrically connected.
Referring to fig. 14 and 15, the housing 504 includes a housing main body 505 and a cover 509, an accommodating space having an opening is formed in the housing main body 505, and the power supply board 514 and the relay board 515 are located in the accommodating space and connected to the housing main body 505. Illustratively, the power board 514 and the relay board 515 may be connected within the housing body 505 by fastening bolts.
Illustratively, referring to fig. 10, 12 and 14, two sets of connection holes 506 are provided on each of the first and second side walls of the housing body 505, each set of connection holes 506 having a third predetermined number of first through holes 507, each first through hole 507 being disposed opposite to the common end Com of the relay unit on the relay board 515, so that a wire connected from each terminal on the interface conversion device 501 can be inserted through the first through hole 507 to be connected to the common end Com of each relay unit.
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 to facilitate connection with each signal line of the standard variable resistor 400.
All set up connecting screw hole on four angles of casing main part 505, four angles of power strip 514 and relay board 515 all are provided with connect the via hole, and connect the via hole and be relative with connecting screw hole. Cover 509 is located above case body 505, and connection holes 510 are provided at four corners of cover 509. 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 power board 514, and screwed into the connection threaded hole to connect with the housing main body 505, so as to accommodate the power board 514 and the relay board 515 in the housing 504.
The cover 509 is further provided with a plurality of mounting through holes 512, each mounting through hole 512 is disposed opposite to the fastening position of the common terminal Com on each relay unit, so that a wiring tool, such as a screwdriver, can extend into the fastening position of the common terminal Com from each mounting through hole 512 to rotate the connecting bolt at the fastening position, thereby connecting the wire extending from each first through hole 507 to the common terminal Com.
The main switch K, the first switches K1, the second switches K2, and the third switches K3 are disposed on the cover 509 and 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 used for illustrating the technical solutions 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 solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A checking circuit is characterized by comprising an interface conversion circuit and a line 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 lines; the second connecting ends of the interface conversion circuits are provided with first connecting groups with the first preset number, the first connecting groups are connected with the acquisition channels in a one-to-one correspondence mode through the first connecting ends, and each first connecting group is provided with first interfaces with the second preset number;
the third connecting end of the line connecting circuit is provided with a first preset number of second connecting groups, the second connecting groups are connected with the first connecting groups in a one-to-one correspondence mode, and each second connecting group is provided with a third preset number of second interfaces; the fourth connection end of the line connection circuit is provided with a third preset number of third interfaces, the line 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.
2. The verification circuit of claim 1, wherein the line connection circuit further comprises a first predetermined number of relay groups, each relay group having a third predetermined number of sub-relays, each sub-relay connected to one of the second interfaces and the corresponding third interface.
3. The verification circuit according to claim 2, wherein the line connection circuit further comprises a power circuit and a first preset number of first switches, the power circuit being connected to the power terminal of each sub-relay in each of the relay groups; the power circuit is also connected with the control end of each sub-relay in the corresponding relay group through each first switch.
4. The verification circuit according to claim 3, wherein the power circuit comprises an ac power circuit, an input of the ac power circuit is used for connecting an ac power source, an output of the ac power circuit is connected to the power terminal of each sub-relay in each relay group, and an output of the ac power circuit is further connected to each first switch.
5. The calibration circuit according to claim 4, wherein the ac power supply circuit comprises a transformer and a rectifying circuit, an input terminal of the transformer is connected to an ac power source, an output terminal of the transformer is connected to an input terminal of the rectifying circuit, the rectifying circuit is configured to convert the ac power outputted 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.
6. The calibration circuit according to claim 4, wherein the power supply circuit further comprises a dc power supply circuit, a second switch and a third switch, one end of the second switch is connected to the ac power supply circuit, the other end of the second switch is connected to each of the first switches, and the second switch is configured 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 anode and the cathode 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 the on-off between the direct current power supply circuit and each first switch.
7. The verification circuit according to claim 6, wherein the dc power supply circuit comprises a secondary battery connected in parallel with the ac power supply circuit, and a positive electrode and a negative electrode of the secondary battery are connected to the power supply terminals of each sub-relay in each relay group; and the positive electrode of the storage battery is also connected with one end of the third switch.
8. The calibration circuit of any of claims 1-7, wherein the second predetermined number is equal to the third predetermined number, and the second interfaces are connected to the third interfaces in a one-to-one correspondence.
9. The verification circuit according to any of claims 1-7, wherein the second predetermined number is greater than the third predetermined number, at least one of the third interfaces being connected to a plurality of the second interfaces.
10. A checking device is characterized by comprising a signal connecting line, an interface conversion device and a line connecting device; one end of the signal connecting wire is used for being connected with the data acquisition board card, 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; and a fourth connecting end of the line connecting circuit is arranged on the shell.
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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516070A (en) * 1982-07-16 1985-05-07 At&T Bell Laboratories Magnetic current sensor with offset and load correction
JP2004072866A (en) * 2002-08-05 2004-03-04 Sanken Electric Co Ltd Power supply device
CN203178460U (en) * 2013-03-28 2013-09-04 国家电网公司 Traceability device used for electronic mutual inductor output calibration instrument
CN203587700U (en) * 2013-12-03 2014-05-07 国家电网公司 Internal resistance online detection device for parallelly-connected storage battery
CN105785127A (en) * 2016-03-10 2016-07-20 威卡自动化仪表（苏州）有限公司 Resistor checking system
CN105955114A (en) * 2014-01-24 2016-09-21 浙江众合科技股份有限公司 Safe input system based on dynamic pulse verification
CN107831369A (en) * 2017-12-19 2018-03-23 成都信息工程大学 A kind of grounding resistance monitor instrument with self-test and correction
CN207345546U (en) * 2017-10-31 2018-05-11 北京新能源汽车股份有限公司 A kind of Vehicular power system and electric automobile
CN108180939A (en) * 2017-12-26 2018-06-19 中国航发四川燃气涡轮研究院 A kind of multifunctional data acquisition card and measuring method
CN208353215U (en) * 2018-04-28 2019-01-08 浙江师范大学 SCM Based digitlization circuit of power factor correction
CN110398354A (en) * 2019-07-19 2019-11-01 广东省特种设备检测研究院中山检测院 A kind of safety valve automatic inspection device, method of calibration and storage medium
CN212207514U (en) * 2020-03-22 2020-12-22 广西电网有限责任公司电力科学研究院 Relay control circuit and capacitor discharge coil direct current resistance test equipment
ES2810574A1 (en) * 2019-09-06 2021-03-08 Univ Malaga Method and device for resistance measurement using a direct interface circuit (Machine-translation by Google Translate, not legally binding)

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516070A (en) * 1982-07-16 1985-05-07 At&T Bell Laboratories Magnetic current sensor with offset and load correction
JP2004072866A (en) * 2002-08-05 2004-03-04 Sanken Electric Co Ltd Power supply device
CN203178460U (en) * 2013-03-28 2013-09-04 国家电网公司 Traceability device used for electronic mutual inductor output calibration instrument
CN203587700U (en) * 2013-12-03 2014-05-07 国家电网公司 Internal resistance online detection device for parallelly-connected storage battery
CN105955114A (en) * 2014-01-24 2016-09-21 浙江众合科技股份有限公司 Safe input system based on dynamic pulse verification
CN105785127A (en) * 2016-03-10 2016-07-20 威卡自动化仪表（苏州）有限公司 Resistor checking system
CN207345546U (en) * 2017-10-31 2018-05-11 北京新能源汽车股份有限公司 A kind of Vehicular power system and electric automobile
CN107831369A (en) * 2017-12-19 2018-03-23 成都信息工程大学 A kind of grounding resistance monitor instrument with self-test and correction
CN108180939A (en) * 2017-12-26 2018-06-19 中国航发四川燃气涡轮研究院 A kind of multifunctional data acquisition card and measuring method
CN208353215U (en) * 2018-04-28 2019-01-08 浙江师范大学 SCM Based digitlization circuit of power factor correction
CN110398354A (en) * 2019-07-19 2019-11-01 广东省特种设备检测研究院中山检测院 A kind of safety valve automatic inspection device, method of calibration and storage medium
ES2810574A1 (en) * 2019-09-06 2021-03-08 Univ Malaga Method and device for resistance measurement using a direct interface circuit (Machine-translation by Google Translate, not legally binding)
CN212207514U (en) * 2020-03-22 2020-12-22 广西电网有限责任公司电力科学研究院 Relay control circuit and capacitor discharge coil direct current resistance test equipment

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
王俊永: "具有电压切换功能的功率因数校正电路", 《硅谷》 *
项琼等: "电力电压互感器在线群校准技术研究", 《电测与仪表》 *

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