CN207703988U - A kind of electromagnetic flowmeter circuit board automatic test platform - Google Patents
A kind of electromagnetic flowmeter circuit board automatic test platform Download PDFInfo
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- CN207703988U CN207703988U CN201820111174.9U CN201820111174U CN207703988U CN 207703988 U CN207703988 U CN 207703988U CN 201820111174 U CN201820111174 U CN 201820111174U CN 207703988 U CN207703988 U CN 207703988U
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Abstract
The utility model discloses a kind of electromagnetic flowmeter circuit board automatic test platforms, including analog signal generator, signal acquisition module and industrial personal computer；Described analog signal generator one end connects circuit board under test, and the circuit board under test other end is connect with signal acquisition module；The analog signal generator includes excitation signal input port, signaling conversion circuit and difference mode signal output port；The circuit board under test includes excitation signal output port, difference mode signal input port, signal processing and conversion module and current signal output end mouth；The signal acquisition module includes current signal input mouth, data acquisition and converting unit and RS485 bus interface；The signal acquisition module is connect by RS485 buses with industrial personal computer；The industrial personal computer includes RS485 bus interface, storage and processing module and display screen.The utility model can quickly investigate out the circuit board under test of operation irregularity.
Description
Technical field
The utility model is related to technical field of measurement and test more particularly to a kind of electromagnetic flowmeter circuit board automatic test are flat
Platform.
Background technology
Currently, electromagnetic flowmeter is widely used in oil, chemical industry, steel, food, electric power, papermaking, metallurgy, plumbing, stone
The industries such as change, medicine are measured and are controlled for flow of production process.Because flowmeter is mainly used for industrial flow metering,
Ensure that the stability of long-term work, used circuit board will carry out long-term ageing test to ensure that work is steady before manufacture
It is fixed.Normal ageing be powered to circuit board, and fixed flow signal source in connection, by manually being recorded, this way is big
A large amount of manpower is put into when amount batch degradation, and single flow point can only be detected, manual record data
Otherness is larger cannot to be found to hide problem well, can not ensure the outgoing of product.In order to solve the above problem, this practicality
It is novel to provide a kind of electromagnetic flowmeter circuit board automatic test platform, it can quickly investigate out the electricity to be measured of operation irregularity
Road plate.
Utility model content
The utility model in view of the shortcomings of the prior art and defect, provides a kind of electromagnetic flowmeter circuit board automation
Test platform can quickly investigate out the circuit board under test of operation irregularity.
In order to achieve the object, technical solution used by the utility model is：
A kind of electromagnetic flowmeter circuit board automatic test platform, including analog signal generator, signal acquisition module and
Industrial personal computer；Described analog signal generator one end connects circuit board under test, the circuit board under test other end and signal acquisition mould
Block connects；The analog signal generator includes excitation signal input port, signaling conversion circuit and difference mode signal output port；
The circuit board under test includes excitation signal output port, difference mode signal input port, signal processing and conversion module and electric current
Signal output port；The signal acquisition module include current signal input mouth, data acquisition it is total with converting unit and RS485
Line interface；The signal acquisition module is connect by RS485 buses with industrial personal computer；The industrial personal computer include RS485 bus interface,
Storage and processing module and display screen.
Further, the analog signal generator, for constant current excitation signal to be converted to the adjustable differential mode of amplitude
Signal, and difference mode signal is sent to circuit board under test；
The circuit board under test, the difference mode signal for sending analog signal generator are converted into corresponding instantaneous flow value
Current signal；
The signal acquisition module, the current signal for acquiring circuit board under test are converted into RS485 signals, and
It is sent to industrial personal computer by RS485 buses；
The industrial personal computer, the RS485 signals for receiving signal acquisition module, and will be stored, divided after signal processing
Analysis or display.
Further, the excitation signal input port and excitation signal output port include the port EXT+, EXT-；Institute
It includes the port SGND, SING+ and SING- to state difference mode signal output port and difference mode signal input port.
Further, the excitation signal input port is connect with signaling conversion circuit, and the signaling conversion circuit includes
Level-one bleeder circuit, two level bleeder circuit and difference mode signal conversion circuit, the level-one bleeder circuit include resistance R2, R4, R7,
Described resistance R2, R4, R7 are sequentially connected in series；The two level bleeder circuit includes adjustable resistor R1 and R6, the differential mode letter
Number conversion circuit includes resistance R3 and R5；
One end of the ports the EXT+ connection resistance R2 of the excitation signal input port, one end of EXT- connection resistance R7；
The other end connection adjustable resistor R6 of the other end connection adjustable resistor R1, the resistance R7 of the resistance R2；It is described can
The other end of regulation resistance R1 is separately connected the ports SING+ of resistance R3 and difference mode signal output port；The adjustable resistor
The other end of R6 is separately connected the ports SING- of resistance R5 and difference mode signal output port；The resistance R3 connects with resistance R5,
The ports SGND of difference mode signal output port are connected between resistance R3 and resistance R5.
Further, the ranging from 4-20mA of the current signal of the signal acquisition module acquisition.
The utility model has the beneficial effects that：
A kind of electromagnetic flowmeter circuit board automatic test platform of the utility model is occurred by laying multiple analog signals
Device can be carried out at the same time the analog detection of multiple flow points, for solving high-volume electromagnetic flowmeter circuit board degradation
Problem；By the resistance value of adjustable resistor in Regulate signal conversion circuit, different flow values, easy to operate letter can be simulated
It is single；Data when by industrial personal computer to degradation record, and are analyzed by data and curves, can reduce people very much
Expenses of labour is used, and ensures the quality of finished product.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of electromagnetic flowmeter circuit board automatic test platform of the utility model.
Fig. 2 is a kind of circuit of the signaling conversion circuit of electromagnetic flowmeter circuit board automatic test platform of the utility model
Figure.
Fig. 3 is a kind of testing process schematic diagram of electromagnetic flowmeter circuit board automatic test platform of the utility model.
Figure label is：1 is analog signal generator, and 2 be circuit board under test, and 3 be signal acquisition module, and 4 be industrial personal computer,
101 be excitation signal input port, and 102 be signaling conversion circuit, and 103 be difference mode signal output port, and 201 is defeated for excitation signal
Exit port, 202 be difference mode signal input port, and 203 be signal processing and conversion module, and 204 be current signal output end mouth,
301 be current signal input mouth, 302 for data acquire and converting unit, 303 be RS485 bus interface, 401 for storage with
Processing module, 402 be display screen.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific implementation mode is described in further detail the utility model：
As shown in Fig. 1 ~ Fig. 2, the utility model provides a kind of electromagnetic flowmeter circuit board automatic test platform, including：
Analog signal generator 1, signal acquisition module 3 and industrial personal computer 4；
1 one end of the analog signal generator connects circuit board under test 2, and 2 other end of the circuit board under test is adopted with signal
Collect module 3 to connect；The analog signal generator 1 includes excitation signal input port 101, signaling conversion circuit 102 and differential mode
Signal output port 103；The circuit board under test 2 includes excitation signal output port 201, difference mode signal input port 202, letter
Number processing and conversion module 203 and current signal output end mouth 204；The signal acquisition module 3 includes current signal input
Mouth 301, data acquisition and converting unit 302 and RS485 bus interface 303；The signal acquisition module 3 passes through RS485 buses
It is connect with industrial personal computer 4；The industrial personal computer 4 includes RS485 bus interface 303, storage and processing module 401 and display screen 402.
The analog signal generator 1, for constant current excitation signal to be converted to the adjustable difference mode signal of amplitude, and will
Difference mode signal is sent to circuit board under test 2；The circuit board under test 2, the difference mode signal for sending analog signal generator 1
It is converted into the current signal of corresponding instantaneous flow value；The signal acquisition module 3, the electric current for acquiring circuit board under test 2
Signal is converted into RS485 signals, and is sent to industrial personal computer 4 by RS485 buses；The industrial personal computer 4, for receiving letter
The RS485 signals of number acquisition module 3, and will be stored, analyzed or shown after signal processing.
The excitation signal input port 101 and excitation signal output port 201 include the port EXT+, EXT-；It is described
Difference mode signal output port 103 and difference mode signal input port 202 include the port SGND, SING+ and SING-.
The excitation signal input port 101 is connect with signaling conversion circuit 102, and the signaling conversion circuit 102 includes
Level-one bleeder circuit, two level bleeder circuit and difference mode signal conversion circuit, the level-one bleeder circuit include resistance R2, R4, R7,
Described resistance R2, R4, R7 are sequentially connected in series；The two level bleeder circuit includes adjustable resistor R1 and R6, the differential mode letter
Number conversion circuit includes resistance R3 and R5；One end of the ports the EXT+ connection resistance R2 of the excitation signal input port 101,
One end of EXT- connection resistance R7；The other end of the other end connection adjustable resistor R1, the resistance R7 of the resistance R2 connect
Meet adjustable resistor R6；The other end of the adjustable resistor R1 is separately connected resistance R3 and difference mode signal output port 103
The ports SING+；The other end of the adjustable resistor R6 is separately connected the SING- of resistance R5 and difference mode signal output port 103
Port；The resistance R3 connects with resistance R5, the ends SGND of difference mode signal output port 103 are connected between resistance R3 and resistance R5
Mouthful；The ranging from 4-20mA for the current signal that the signal acquisition module 3 acquires.
Referring to FIG. 3, a kind of electromagnetic flowmeter circuit board automatic test that Fig. 3 is provided by the utility model embodiment
The testing process schematic diagram of platform；Test process is：
The number for setting the burn-in test time on industrial personal computer 4, fluctuating the current signal for judging range and signal acquisition module 3
According to sample frequency.
One end of circuit board under test 2 is connected into analog signal generator 1, excitation signal input port 101 and excitation signal
The equal port EXT+, EXT- of output port 201 is correspondingly connected with respectively；Difference mode signal output port 103 and difference mode signal are defeated
The port SGND, SING+ and SING- in inbound port 202 is connected respectively；The current signal output end mouth of circuit board under test 2
204 connect with the current signal input mouth 301 of signal acquisition module 3.
Circuit board under test 2 sends out constant current excitation signal to analog signal generator 1, the signal in analog signal generator 1
Constant current excitation signal is converted to the adjustable difference mode signal of amplitude by conversion circuit 102, and difference mode signal is sent to electricity to be measured
Road plate 2；
By adjusting adjustable resistor R1 and R6 resistance value, the amplitude of output difference mode signal can be changed, realize output difference
The amplitude of mould signal is adjustable；To which multiple and different flow values, circuit board under test 2 can be simulated by analog signal generator 1
To the analog detection of multiple flow points, the burn-in test to circuit board under test 2 is realized.
After circuit board under test 2 receives difference mode signal, corresponding wink is converted by signal processing and conversion module 203
When flow value 4-20mA current signal.
Signal acquisition module 3 acquires the current signal of circuit board under test 2, is converted into RS485 signals, and pass through
RS485 buses are sent to industrial personal computer 4.
The RS485 signals for receiving signal acquisition module 3 are handled and are analyzed by industrial personal computer 4.
Circuit board under test 2 of the instantaneous flow fluctuation range beyond setting fluctuation range is detected, for qualified electricity to be measured
Plate 2 industrial personal computer 4 in road generates burn-in test printing list.
Testing result is stored, analyzed or is shown by industrial personal computer 4, while sending the result to specified mailbox, is gone forward side by side
Row acousto-optic hint.
A kind of electromagnetic flowmeter circuit board automatic test platform of the utility model, including industrial personal computer 4, signal gathering unit
3, analog signal generator 1 and circuit board under test 2, industrial personal computer 4 can acquire multiple simulations simultaneously according to the setting sampling time to be believed
The flow signal for the flow detection point that number generator 1 is simulated passes through the constant current that the appliance circuit of electromagnetic flowmeter itself provides
Excitation signal realizes analog flow signals by adjustable resistance partial pressure；It is that circuit board under test 2 detects by recording electromagnetic flowmeter
The instantaneous flow information arrived is to database；After carrying out long-term aging test, by database data analysis, judging instantaneous flow
Whether fluctuation exceeds setting fluctuation range uses the analog signal that can be adjusted to judge the circuit board under test 2 of operation irregularity
Source carries out the analog detection of multiple flow points, facilitates investigation problem；Result data is sent after the completion to setting mailbox, and carry out sound
Light alarm.
The utility model can test the circuit board of large batch of electromagnetic flowmeter, fast, easily investigate out
The circuit board of operation irregularity reduces labour cost, ensures the quality of finished product.
It should be noted that the embodiment of the above is the preferred embodiment of the utility model, not limit
The scope of the utility model, thus all structure, feature and principles according to described in the utility model patent range done it is equivalent
Changes or modifications should all be included in present utility model application the scope of the claims.
Claims (5)
1. a kind of electromagnetic flowmeter circuit board automatic test platform, which is characterized in that including analog signal generator（1）, letter
Number acquisition module（3）And industrial personal computer（4）；The analog signal generator（1）One end connects circuit board under test（2）, described to be measured
Circuit board（2）The other end and signal acquisition module（3）Connection；The analog signal generator（1）Including excitation signal input terminal
Mouthful（101）, signaling conversion circuit（102）With difference mode signal output port（103）；The circuit board under test（2）Believe including excitation
Number output port（201）, difference mode signal input port（202）, signal processing and conversion module（203）And current signal output end
Mouthful（204）；The signal acquisition module（3）Including current signal input mouth（301）, data acquisition and converting unit（302）
With RS485 bus interface（303）；The signal acquisition module（3）Pass through RS485 buses and industrial personal computer（4）Connection；The industry control
Machine（4）Including RS485 bus interface（303）, storage and processing module（401）And display screen（402）.
2. a kind of electromagnetic flowmeter circuit board automatic test platform according to claim 1, which is characterized in that the mould
Quasi- signal generator（1）, for constant current excitation signal to be converted to the adjustable difference mode signal of amplitude, and difference mode signal is sent
To circuit board under test（2）；
The circuit board under test（2）, it is used for analog signal generator（1）The difference mode signal of transmission is converted into corresponding instantaneous flow
The current signal of value；
The signal acquisition module（3）, for acquiring circuit board under test（2）Current signal, be converted into RS485 signals,
And industrial personal computer is sent to by RS485 buses（4）；
The industrial personal computer（4）, for receiving signal acquisition module（3）RS485 signals, and will be stored after signal processing,
Analysis or display.
3. a kind of electromagnetic flowmeter circuit board automatic test platform according to claim 1, which is characterized in that
The excitation signal input port（101）With excitation signal output port（201）It include the port EXT+, EXT-；It is described
Difference mode signal output port（103）With difference mode signal input port（202）It include the port SGND, SING+ and SING-.
4. a kind of electromagnetic flowmeter circuit board automatic test platform according to claim 3, which is characterized in that described to encourage
Magnetic signal input port（101）With signaling conversion circuit（102）Connection, the signaling conversion circuit（102）It is divided including level-one
Circuit, two level bleeder circuit and difference mode signal conversion circuit, the level-one bleeder circuit include resistance R2, R4, R7, the resistance
R2, R4, R7 are sequentially connected in series；The two level bleeder circuit includes adjustable resistor R1 and R6, the difference mode signal conversion electricity
Road includes resistance R3 and R5；
The excitation signal input port（101）The ports EXT+ connection resistance R2 one end, one end of EXT- connection resistance R7；
The other end connection adjustable resistor R6 of the other end connection adjustable resistor R1, the resistance R7 of the resistance R2；It is described can
The other end of regulation resistance R1 is separately connected resistance R3 and difference mode signal output port（103）The ports SING+；It is described adjustable
The other end of resistance R6 is separately connected resistance R5 and difference mode signal output port（103）The ports SING-；The resistance R3 and electricity
It hinders and connects difference mode signal output port between R5 series connection, resistance R3 and resistance R5（103）The ports SGND.
5. a kind of electromagnetic flowmeter circuit board automatic test platform according to claim 1, which is characterized in that the letter
Number acquisition module（3）The ranging from 4-20mA of the current signal of acquisition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111174.9U CN207703988U (en) | 2018-01-23 | 2018-01-23 | A kind of electromagnetic flowmeter circuit board automatic test platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111174.9U CN207703988U (en) | 2018-01-23 | 2018-01-23 | A kind of electromagnetic flowmeter circuit board automatic test platform |
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| Publication Number | Publication Date |
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| CN207703988U true CN207703988U (en) | 2018-08-07 |
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| CN201820111174.9U Active CN207703988U (en) | 2018-01-23 | 2018-01-23 | A kind of electromagnetic flowmeter circuit board automatic test platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152716A (en) * | 2018-01-23 | 2018-06-12 | 开封青天伟业流量仪表有限公司 | A kind of electromagnetic flowmeter circuit board automatic test platform and test method |
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2018
- 2018-01-23 CN CN201820111174.9U patent/CN207703988U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152716A (en) * | 2018-01-23 | 2018-06-12 | 开封青天伟业流量仪表有限公司 | A kind of electromagnetic flowmeter circuit board automatic test platform and test method |
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