CN106405187A - Adaptive controllable air resistor - Google Patents
Adaptive controllable air resistor Download PDFInfo
- Publication number
- CN106405187A CN106405187A CN201610673996.1A CN201610673996A CN106405187A CN 106405187 A CN106405187 A CN 106405187A CN 201610673996 A CN201610673996 A CN 201610673996A CN 106405187 A CN106405187 A CN 106405187A
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- resistance
- relay
- control module
- main control
- air resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/08—Circuits for altering the measuring range
- G01R15/09—Autoranging circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
Abstract
Provided is an adaptive controllable air resistor. Sampling resistors with appropriate resistance are selected by a main control module from multiple sets of or multiple sampling resistors packaged together to match corresponding current measurement ranges. Thus, the power of the sampling resistors is not overrun, and the sampling resistors are protected. Moreover, the current value can be measured quickly and accurately, and the need for a processing process of long-time temperature control to ensure the stability of resistance due to sampling resist replacement is avoided. The adaptive controllable air resistor is characterized in that the adaptive controllable air resistor comprises a main control module; the main control module is connected with a data sampling control module, a multi-channel switching circuit, and a driver module; the multi-channel switching circuit includes a plurality of sampling current paths; a relay is arranged on each sampling current path; each relay is connected with one sampling air resistor; and the sampling air resistors on the sampling current paths are provided with different resistance so as to correspond to different current measurement ranges.
Description
Technical field
The present invention relates to current measurement techniques, particularly a kind of self adaptation Controllable Air resistor, by main control module from
The sampled air resistance of appropriate resistance is chosen to mate corresponding current measurement amount in the multiple air resistance being packaged together
Journey, thus can either guarantee power less than sampled air resistance to ensure the current measurement degree of accuracy again it can be avoided that because changing
Sampled air resistance and the long-time temperature control of needs that leads to are to ensure the processing procedure of resistance stability.
Background technology
The various spacecraft such as satellite, airship is required for carrying out the large-scale experiment of integrated environment simulation, difficult in process of the test
Exempt to be simulated using large power supply, mostly be high stability D.C. high-current source in these large power supplies, existing cannot
Carry, need field calibration demand.Such source current value reaches hundreds of peace, and stability is 5 × 10-5/ h magnitude, therefore from straight
Stream current comparator carries out accurate measurement to D.C. high-current.When measuring high current, need first by tested electric current press certain than
Example is converted into small current, is then compared with the electric current flowing through in sampling resistor again, finally gives accurate high current value.By
Unknown in tested electric current, want tested electric current accurately and reliably it is important to the selection of sampling resistor.According to conventional metering system,
Sampling resistor all needs manually to choose, each change sampling resistor after in addition it is also necessary to through long-time temperature control to ensure the steady of resistance
Qualitative, test process is wasted time and energy.It is thus desirable to a set of according to the sampling system of size of current automatic switchover resistance, and can pass
The scanning switch of system coordinates the problem that air resistance builds sampling apparatus to be, one is that scanning switch has larger thermoelectrical potential,
Impact measurement result accuracy, two be traditional scanning switch and air resistance volume larger and cannot temperature control simultaneously, impact surveys
Examination efficiency.The present invention proposes a kind of method for designing of self adaptation controlled high accuracy air resistance, and be have developed according to the method
A set of self adaptation Controllable Air resistance, this resistance has been applied in D.C. high-current calibration system at present, and after tested, this system is accurate
Exactness is high, good stability, substantially increases D.C. high-current testing efficiency using this device, thus this invention has good application
Prospect.
Content of the invention
The present invention is directed to defect or deficiency present in prior art, provides a kind of self adaptation Controllable Air resistor, leads to
Cross the sampling electricity that main control module is selection appropriate resistance air resistance from the many sets being packaged together or multiple sampling resistor
Resistance is mating corresponding current measurement range, thus power less than sampling resistor can either be guaranteed to protect sampling resistor,
Quick and precisely current value can be measured additionally it is possible to avoid the long-time temperature control of needs leading to because changing sampling resistor to ensure again
The processing procedure of resistance stability.
Technical scheme is as follows：
It is characterised in that including main control module, described main control module connects data to self adaptation Controllable Air resistor respectively
Sampling control module, multi-channel switch circuit and drive module, described multi-channel switch circuit includes some sample rate currents and leads to
Road, each sample rate current path is provided with a relay, and described relay connects a sampled air resistance, and each bar is adopted
Sampled air resistance on sample current path has different resistance values with the different current measurement range of correspondence.
Described main control module includes single-chip microcomputer, main control unit and Auxiliary Control Element.
Described data sampling control module comprises A/D convertor circuit, 12 AD that A/D convertor circuit can be powered using single supply
Converter, or 24 bit A/D converters using dual power supply, or the analog-digital chip using higher precision.
Described data sampling control module includes AD converter, and described drive module includes the first drive circuit, described AD
Converter connects the first relay, and described first relay connects the first drive circuit and a parallel resistive circuit, institute respectively
State the first drive circuit and include metal-oxide-semiconductor circuit or the 1st triode, described metal-oxide-semiconductor circuit or the 1st triode connect described master control mould
Block, described parallel resistive circuit is parallel to the two ends of described multi-channel switch circuit, and described parallel resistance is shunt resistance.
Described multi-channel switch circuit includes at least three sample rate current paths, and wherein first sample rate current path includes
First range sampled air resistance, the first range sampled air resistance connects the 3rd relay, and the 3rd relay passes through the 3rd three pole
Pipe connects described main control module；Article 2 sample rate current path includes the second range sampled air resistance, and the second range sampling is empty
Pneumoelectric resistance connects the 4th relay, and the 4th relay passes through the 4th triode and connects described main control module；Article 3 sample rate current leads to
Road includes the 3rd range sampled air resistance, and the 3rd range sampled air resistance connects the 5th relay, and the 5th relay passes through
5th triode connects described main control module.
Described data sampling control module extends to 8 sampling channels；Described multi-channel switch circuit includes one and does not contain
The current path of sampled air resistance, the described current path without sampled air resistance includes the second relay, the second relay
Device passes through the 2nd triode and connects described main control module.
The double-point double-throw switch that sampled air resistance on each bar sample rate current path passes through in each relay shares one
Voltage measurement table.
Described sampled air resistance adopts 4 resistance to constitute, and described 4 resistance are and comprise aluminum alloy casing, gold-plated end
Button and the air resistance using the encapsulation of polytetrafluoroethylene (PTFE) block, described 4 resistance are connected after parallel connection two-by-two, described 4 electricity
Resistance collectively forms described sampled air resistance；The resistance value of the wherein first range sampled air resistance is 1 ohm, and the second range is adopted
The resistance value of sample air resistance is 10 ohm, and the resistance value of the 3rd range sampled air resistance is 100 ohm, the first range ability
For 0～3mA, the second range ability is 3～30mA, and the 3rd range ability is 30～350mA.
Described relay is low-heat potential relay or electromagnetic relay, and the contact resistance of electromagnetic relay inner contact is about
50mΩ.
Described drive module is the total radio amplifier being constituted using PNP triode, or adopts metal-oxide-semiconductor drive circuit, with
Lifting main control module I/O mouth driving force.
The technique effect of the present invention is as follows：Self adaptation Controllable Air resistor of the present invention, the technology of its self adaptation resistance refers to
Mark stability is better than 1 × 10-5/ h, while improving accuracy of measurement, also greatly reduces the temperature control time of resistance.The present invention
Determine the adaptivity of current measurement so as to meet the specific demand of high stability D.C. high-current calibration system.
Brief description
Fig. 1 is the system architecture schematic block diagram implementing self adaptation Controllable Air resistor of the present invention.
Fig. 2 is the circuit principle structure schematic diagram implementing self adaptation Controllable Air resistor of the present invention.
Reference lists as follows：STC89C52- main control module/governor circuit main control module, including port P00 to P37
(wherein P00～P07 corresponds to main control module pin 39～32, and P10～P17 corresponds to main control module pin 1～8, and P20～P27 corresponds to
Main control module pin 21～28, P30～P37 corresponds to main control module pin 10～17), P00 docking the 3rd relay K3, P01 pair
Meet the 4th relay K4, P02 docks the 5th relay K5, P03 docks the first relay K1, P04 docks the second relay K2,
P00～P04 is actuating of relay command port, and P13～P17 is AD control instruction port, and P20～P27 is AD data bit port；
MAX197-AD converter/analog-digital converter；K1- the first relay/the first double-point double-throw switch；K2- second relay/the second
Double-point double-throw switch；K3- the 3rd relay/the 3rd double-point double-throw switch；K4- the 4th relay/the 4th double-point double-throw switch；
K5- the 5th relay/the 5th double-point double-throw switch；V1 the 1st triode；V2 the 2nd triode；V3 the 3rd triode；V4 the 4th
Triode；V5 the 5th triode；Rx1 the first range sampled air resistance；Rx2 the second range sampled air resistance；Rx3
Three range sampled air resistance；R1 first resistor；R2 second parallel resistance；R3 the 3rd parallel resistance；R4 the 4th electricity in parallel
Resistance；R5 the 5th parallel resistance；R6 the 6th resistance；R7 the 7th resistance；R8 the 8th resistance；R9 the 9th resistance；R10 the tenth electricity
Resistance；R11 first divider resistance；R12 second divider resistance.
Specific embodiment
Below in conjunction with the accompanying drawings (Fig. 1-Fig. 2) the present invention will be described.
Fig. 1 is the system architecture schematic block diagram implementing self adaptation Controllable Air resistor of the present invention.Fig. 2 is to implement the present invention
The circuit principle structure schematic diagram of self adaptation Controllable Air resistor.As shown in Figure 1 to Figure 2, self adaptation Controllable Air resistor,
Including main control module, described main control module connects data sampling control module, multi-channel switch circuit and drive module, institute respectively
State multi-channel switch circuit and include some sample rate current paths, each sample rate current path is provided with a relay,
Described relay connects a sampled air resistance, and the sampled air resistance on each bar sample rate current path has different resistance
Value (for example, Rx1=1 Ω, Rx2=10 Ω, Rx3=100 Ω etc.) with the different current measurement range of correspondence (for example, 0～3mA,
3～30mA, 30～350mA etc.).Described main control module includes Chip Microcomputer A RM, main control unit and Auxiliary Control Element.Master control
Circuit includes main control module STC89C52.Described data sampling control module comprises A/D convertor circuit, and A/D convertor circuit can adopt
12 bit A/D converters that single supply is powered, or 24 bit A/D converters using dual power supply, or the modulus using higher precision
Chip.Described data sampling control module includes AD converter MAX197, and described drive module includes the first drive circuit, described
AD converter MAX197 connects the first relay K1, and described first relay K1 connects the first drive circuit and a parallel connection respectively
Resistance circuit (for example, by 5 100 Ω resistance R1, R2, R3, R4, R5 form), described first drive circuit includes metal-oxide-semiconductor circuit
Or the 1st triode V1, described metal-oxide-semiconductor circuit or the 1st triode V1 connect described main control module STC89C52, described parallel resistance
In the two ends of described multi-channel switch circuit, described parallel resistance is shunt resistance to circuit in parallel.
Described multi-channel switch circuit includes at least three sample rate current paths, and wherein first sample rate current path includes
First range sampled air resistance Rx1, the first range sampled air resistance Rx1 connects the 3rd relay K3, the 3rd relay K3
Described main control module STC89C52 is connected by the 3rd triode V3；It is empty that Article 2 sample rate current path includes the second range sampling
Pneumoelectric hinders Rx2, and the second range sampled air resistance Rx2 connects the 4th relay K4, and the 4th relay K4 passes through the 4th triode V4
Connect described main control module STC89C52；Article 3 sample rate current path includes the 3rd range sampled air resistance Rx3, the 3rd amount
Journey sampled air resistance Rx3 connects the 5th relay K5, and the 5th relay K5 passes through the 5th triode V5 and connects described main control module
STC89C52.Described data sampling control module extends to 8 sampling channels；Described multi-channel switch circuit includes one and does not contain
The current path of sampled air resistance Rx, the described current path without sampled air resistance includes the second relay K2, and second
Relay K2 passes through the 2nd triode V2 and connects described main control module STC89C52.Sampled air on each bar sample rate current path
Resistance shares a voltage measurement Table V by the double-point double-throw switch in each relay.Described sampled air resistance adopts 4 electricity
Resistance is constituted, and described 4 resistance are and comprise aluminum alloy casing, gold-plated terminal and the air electricity using the encapsulation of polytetrafluoroethylene (PTFE) block
Resistance, described 4 resistance are connected after parallel connection two-by-two, and described 4 resistance collectively form described sampled air resistance；Wherein first
The resistance value of range sampled air resistance Rx1 is 1 ohm, and the resistance value of the second range sampled air resistance Rx2 is 10 ohm, the
The resistance value of three range sampled air resistance Rx3 be 100 ohm, the first range ability be 0～3mA, the second range ability be 3～
30mA, the 3rd range ability is 30～350mA.Described relay is low-heat potential relay or electromagnetic relay, electromagnetism relay
The contact resistance of device inner contact about 50m Ω.Described drive module is the total radio amplifier being constituted using PNP triode, or
Using metal-oxide-semiconductor drive circuit, to lift main control module I/O mouth driving force.
1 Ω, 10 Ω and tri- sampled air resistance of 100 Ω are packaged in self adaptation Controllable Air resistor (hereinafter referred to as
Self adaptation resistance) in, then by the selection of master control module controls sampled air resistance, both guaranteed less than sampled air resistance
Power, more can guarantee that the current measurement degree of accuracy.The circuit chief component of self adaptation resistance includes governor circuit, AD conversion electricity
Road, switching circuit and drive circuit.1) governor circuit.With main control module STC89C52 as core, mainly complete to A/D chip
Data transfer and the actuating of relay control.Purpose is process signal, and gating range is judged and controls.2) AD conversion electricity
Road.It is made up of digital to analog converter and one group of parallel resistance.Wherein parallel resistance is made up of 5 100 Ω resistance.D/A converting circuit
Based on MAX197, major function is that ohmically for sampled air voltage is carried out analog-to-digital conversion, and then identified input electric current, and will
Signal input is to main control module.3) switching circuit and drive circuit.Switching circuit selects miniature electro-magnetic relay DS2Y-S-
DC5V, DPDT；Drive circuit uses 8550 triodes, lifts main control module I/O mouth driving force.Switching circuit is divided into four
Bar current path.In addition to a path comprises only relay, its every road of excess-three bar path is all by a relay and a sampling
Air resistance is constituted.Purpose is by the adhesive control electric current path of relay.
Self adaptation Controllable Air resistor maximum allowed current be 350mA it is contemplated that the requirement of accuracy of measurement, by electric current
It is divided into three ranges, i.e. Rang1For (0～3) mA, Rang2For (3～30) mA, Rang3For (30～350) mA.In Rang1Middle use
100 Ω are as sampled air resistance, in Rang2In use 10 Ω as sampled air resistance, in Rang3In use 1 Ω empty as sampling
Pneumoelectric hinders.After electric current flows through and adopts change-over circuit and select corresponding sampled air resistance, the voltage at resistance two ends is measured,
Then again divided by sampled air resistance value, as standard current value.
Circuit operation principle is as follows：1) main control module adopt electrification reset pattern, crystal oscillator frequency 11.0592MHz, P0.0～
P0.4 mouth instructs as the actuating of relay, and, as AD control instruction, P2.0～P2.7 mouth is as AD data bit for P1.3～P1.7 mouth.
After upper electricity, main control module waits the ohmically Voltage Establishment of sampled air, then triggers the K1 actuating of relay.Now A/D chip
Two analog channels are connected on the two ends of sampled air resistance respectively, and master control module controls A/D chip changes two passages at twice
Magnitude of voltage, reads the transformation result of high and low two bytes, is done subtraction and obtains sampled air ohmically pressure drop numeral
Amount, the interval resistance determining corresponding use according to belonging to digital quantity.After selected resistance, trigger the corresponding relay of resistance first
Action, then discharges short-circuit relay K2 again, finally discharges K1 relay, and the method one side guarantees to occur without electric current in loop
Interrupt, on the other hand guarantee that the electric current of constant-current source all flows through measuring resistance.2) MAX197 is that 12 AD that single supply is powered turn
Parallel operation, have that range is many, passage is many, independent between passage the features such as, conversion time is up to 6us, highest sample frequency
100KSps.In the design, less demanding to conversion speed and sample frequency, therefore obtained using MAX197 internal clocking, inside
The mode of operation taking；Required precision to electric current identification is high, therefore adopts 0～10V shelves unipolarity range, the work of outside reference
Pattern.Outside reference voltage is provided by the divider resistance that R11, R12 form, about 3.23V, then the actual range of MAX1997
For 0V～7.88V (higher than the arbitrary terminal voltage of sampled air resistance), voltage step input about 2mV, equivalent current marching technique amount is about
0.1mA.After main control module is at twice to control byte write 0x50 and 0x51 of MAX197, MAX197 will be respectively started to passage
0 and the AD conversion of passage 1, conversion every time all takes about 7.7us, MAX197 complete internal conversion after by INT set low position be used for outer
Portion interrupts, and when main control module reads AD result data, INT puts the standby conversion next time of high levels automatically.3) switching circuit
Core component is electromagnetic relay DS2Y-S-DC5V, the contact resistance about 50m Ω of its inner contact, using the linkage of its double-pole
Feature carries out the conversion of the introducing of voltmeter and measuring resistance it is ensured that one piece of voltmeter can complete three tunnel resistance terminal simultaneously
The measurement of voltage.4) drive circuit is to constitute total radio amplifier using PNP triode, and the low level triggering of main control module makes
In saturation state, colelctor electrode output voltage about 4.7V and electric current are higher than 140mA to triode operation, meet the work of relay line bag
Voltage and electric current.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.Although additionally, employing some specific terms in this specification, these terms are only
For convenience of explanation, any restriction is not constituted to the present invention.
Claims (10)
1. it is characterised in that including main control module, described main control module connects data and adopts self adaptation Controllable Air resistor respectively
Sample control module, multi-channel switch circuit and drive module, described multi-channel switch circuit includes some sample rate current paths,
One relay is provided with each sample rate current path, described relay connects a sampled air resistance, each bar sampling
Sampled air resistance on current path has different resistance values with the different current measurement range of correspondence.
2. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described main control module includes monolithic
Machine, main control unit and Auxiliary Control Element.
3. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described data sampling control module
Comprise A/D convertor circuit, 12 bit A/D converters that A/D convertor circuit can be powered, or 24 using dual power supply using single supply
Bit A/D converter, or the analog-digital chip using higher precision.
4. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described data sampling control module
Including AD converter, described drive module includes the first drive circuit, and described AD converter connects the first relay, and described first
Relay connects the first drive circuit and a parallel resistive circuit respectively, described first drive circuit include metal-oxide-semiconductor circuit or
1st triode, described metal-oxide-semiconductor circuit or the 1st triode connect described main control module, and described parallel resistive circuit is parallel to described
The two ends of multi-channel switch circuit, described parallel resistance is shunt resistance.
5. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described multi-channel switch circuit bag
Include at least three sample rate current paths, wherein first sample rate current path includes the first range sampled air resistance, the first amount
Journey sampled air resistance connects the 3rd relay, and the 3rd relay passes through the 3rd triode and connects described main control module；Article 2 is adopted
Sample current path includes the second range sampled air resistance, and the second range sampled air resistance connects the 4th relay, and the 4th continues
Electrical equipment passes through the 4th triode and connects described main control module；Article 3 sample rate current path includes the 3rd range sampled air resistance,
3rd range sampled air resistance connects the 5th relay, and the 5th relay passes through the 5th triode and connects described main control module.
6. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described data sampling control module
Extend to 8 sampling channels；Described multi-channel switch circuit include one do not contain sampled air resistance current path, described not
Current path containing sampled air resistance includes the second relay, and the second relay passes through the 2nd triode and connects described master control mould
Block.
7. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that on each bar sample rate current path
Sampled air resistance shares a voltage measurement table by the double-point double-throw switch in each relay.
8. self adaptation Controllable Air resistor according to claim 5 is it is characterised in that described sampled air resistance adopts
4 resistance are constituted, and described 4 resistance are and comprise aluminum alloy casing, gold-plated terminal and adopt the encapsulation of polytetrafluoroethylene (PTFE) block
Air resistance, described 4 resistance are connected after parallel connection two-by-two, and described 4 resistance collectively form described sampled air resistance；Its
In the resistance value of the first range sampled air resistance be 1 ohm, the resistance value of the second range sampled air resistance is 10 ohm, the
The resistance value of three range sampled air resistance be 100 ohm, the first range ability be 0～3mA, the second range ability be 3～
30mA, the 3rd range ability is 30～350mA.
9. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described relay is low-heat potential
Relay or electromagnetic relay, the contact resistance about 50m Ω of electromagnetic relay inner contact.
10. self adaptation Controllable Air resistor according to claim 1 is it is characterised in that described drive module is to use
The total radio amplifier that PNP triode is constituted, or adopt metal-oxide-semiconductor drive circuit, to lift main control module I/O mouth driving force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610673996.1A CN106405187A (en) | 2016-08-16 | 2016-08-16 | Adaptive controllable air resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610673996.1A CN106405187A (en) | 2016-08-16 | 2016-08-16 | Adaptive controllable air resistor |
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| Publication Number | Publication Date |
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| CN106405187A true CN106405187A (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610673996.1A Pending CN106405187A (en) | 2016-08-16 | 2016-08-16 | Adaptive controllable air resistor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486052A (en) * | 2020-10-15 | 2021-03-12 | 中车青岛四方机车车辆股份有限公司 | Bogie real-time sensor intelligent detection electrical control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05346809A (en) * | 1991-12-13 | 1993-12-27 | Moore Prod Co | Multi-mode input and output circuit and module and process control system using the same |
| CN201449411U (en) * | 2009-07-02 | 2010-05-05 | 苏州经贸职业技术学院 | Multichannel current sampling circuit |
| CN205015773U (en) * | 2015-08-26 | 2016-02-03 | 重庆会凌电子新技术有限公司 | Big dynamic current collection system of high accuracy and constant voltage constant current supply system thereof |
| CN105738673A (en) * | 2016-02-04 | 2016-07-06 | 北京经纬恒润科技有限公司 | Measuring range switching method and measuring range switching circuit |
-
2016
- 2016-08-16 CN CN201610673996.1A patent/CN106405187A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05346809A (en) * | 1991-12-13 | 1993-12-27 | Moore Prod Co | Multi-mode input and output circuit and module and process control system using the same |
| CN201449411U (en) * | 2009-07-02 | 2010-05-05 | 苏州经贸职业技术学院 | Multichannel current sampling circuit |
| CN205015773U (en) * | 2015-08-26 | 2016-02-03 | 重庆会凌电子新技术有限公司 | Big dynamic current collection system of high accuracy and constant voltage constant current supply system thereof |
| CN105738673A (en) * | 2016-02-04 | 2016-07-06 | 北京经纬恒润科技有限公司 | Measuring range switching method and measuring range switching circuit |
Non-Patent Citations (1)
| Title |
|---|
| 曹佃生: "多档位自动切换电流测量电路设计", 《福建电脑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486052A (en) * | 2020-10-15 | 2021-03-12 | 中车青岛四方机车车辆股份有限公司 | Bogie real-time sensor intelligent detection electrical control system |
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Application publication date: 20170215 |