CN107247188A - A kind of portable electric parameter intelligent detector - Google Patents
A kind of portable electric parameter intelligent detector Download PDFInfo
- Publication number
- CN107247188A CN107247188A CN201710681474.0A CN201710681474A CN107247188A CN 107247188 A CN107247188 A CN 107247188A CN 201710681474 A CN201710681474 A CN 201710681474A CN 107247188 A CN107247188 A CN 107247188A
- Authority
- CN
- China
- Prior art keywords
- microprocessor
- circuit
- relay switch
- switch control
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/14—Measuring resistance by measuring current or voltage obtained from a reference source
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
-
- 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
-
- 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
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
-
- 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
- G05B2219/25—Pc structure of the system
- G05B2219/25252—Microprocessor
-
- 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
- G05B2219/26—Pc applications
- G05B2219/2604—Test of external equipment
Abstract
The invention discloses a kind of portable electric parameter intelligent detector, including constant-current source circuit, the first constant voltage power supply circuit, the second constant voltage power supply circuit, relay switch control interface, microprocessor, A/D sample circuits and host computer, constant-current source circuit, the first constant voltage power supply circuit, the second constant voltage power supply circuit connect test product after relay switch control interface, A/D sample circuits are connected with test product, microprocessor, microprocessor is connected with relay switch control interface, and microprocessor carries out data transmission with host computer.Test product is connected to relay switch control interface, user sends preset instructions to microprocessor by host computer, microprocessor control relay switch control interface circuit automatically switches to the different terminals of test product to test different test items according to preset order, test value sends into microprocessor through A/D sampling circuit samples, and be uploaded to host computer and shown, realize automatic detection.
Description
Technical field
The present invention relates to a kind of portable electric parameter intelligent detector.
Background technology
The product of plant produced is that multiple electronic units are formed by connecting by core of a cable, is equipped with part detection, part
The technological processes such as assembling.General assembly assembling is both needed to electrically be joined from component inspection, bunch of cables welding, part assembling, each link
Number Test And Checkout, test job amount is very big.Electric parameter detection uses common apparatus always in current assembling process（It is such as low
Resistance instrument M210 surveys conducting resistance, small resistor, and remaining resistance uses digital multimeter and pointer multimeter MF500）, artificial point
To a measurement, manual record measurement result, labor intensity is big, higher to operative's skill set requirements, and easily goes out in detection process
Existing missing inspection, false retrieval, are unfavorable for the monitoring to product quality.Further, since product contains priming system, therefore, electric ginseng is carried out to product
Require that safe current is no more than 150 mA during number detection.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of simple in construction, cost low, safe portable electric
Parameter intelligent detector.
Technical proposal that the invention solves the above-mentioned problems is：A kind of portable electric parameter intelligent detector, including constant-current source
Circuit, the first constant voltage power supply circuit, the second constant voltage power supply circuit, relay switch control interface, microprocessor, A/D sampling electricity
Road, power circuit, calibration interface and host computer, the output end of constant-current source circuit, the output end of the first constant voltage power supply circuit, the second perseverance
The output end of source circuit connects test product, the input of A/D sample circuits after relay switch control interface
It is connected with test product, the magnitude of voltage of test product is flowed through for measuring, the output of A/D sample circuits is connected to microprocessor,
Microprocessor is connected with relay switch control interface, relay switch control interface connection calibration interface, power supply
Circuit is connected with microprocessor, and working power is provided to microprocessor, and microprocessor enters line number by telecommunication circuit and host computer
According to transmission.
Above-mentioned portable electric parameter intelligent detector, the constant-current source circuit output current is 2.5mA, and it includes the first electricity
Source fiducial chip and the first operational amplifier, the output end of the first power reference chip and the input phase of the first operational amplifier
Even, the output end of the first operational amplifier is connected with relay switch control interface.
Above-mentioned portable electric parameter intelligent detector, the first power reference chip is using Linear Tech
LT1009CZ-2.5V power reference chips, the first operational amplifier uses AD8571.
Above-mentioned portable electric parameter intelligent detector, the first constant voltage power supply circuit output voltage is 1.5V, and it includes the
Two power reference chips and the second operational amplifier, the output end of second source fiducial chip and the input of the second operational amplifier
End is connected, and the output end of the second operational amplifier is connected with relay switch control interface.
Above-mentioned portable electric parameter intelligent detector, the second source fiducial chip is using Linear Tech
LT1009CZ-2.5V power reference chips, the second operational amplifier uses OP07.
Above-mentioned portable electric parameter intelligent detector, the second constant voltage power supply circuit output voltage is 10V, and it includes the 3rd
Power reference chip, the output end of the 3rd power reference chip is connected with relay switch control interface.
Above-mentioned portable electric parameter intelligent detector, the 3rd power reference chip uses the LM4040A10 of TI companies
Power reference chip.
Above-mentioned portable electric parameter intelligent detector, the master chip of the A/D sample circuits uses ADS1243.
The beneficial effects of the present invention are：Test product passes through test adaptor cable connection to relay switch control interface
Circuit, user sends preset instructions to microprocessor, microprocessor control relay switch control interface circuit by host computer
The different terminals of test product are automatically switched to according to preset order to test different test items, and microprocessor calculates tested item
Resistance is simultaneously packaged as data frame and is sent to host computer, and host computer carries out dissection process to the data frame received again, and will
Measurement result is shown, is stored, inquired about and printed, and this detector can be carried out certainly to the electrical parameter in general assembly assembling process
Dynamic detection and differentiation, effectively increase production efficiency, realize intellectualized detection.
The safety Design of the present invention is：When surveying low resistance, 2.5mA continuous current is defeated from fastp-acting fuse F2
Go out, when in measurement process system occur it is abnormal cause electric current to be more than 5mA when, fuse F2 can in 1ms quick fuse, to protect
The measurement safety of card system；In 2.5mA constant-current source measuring low resistances, tested loop passes through 2 500 Ω resistance of Control
R13 and R17 current-limiting resistances in series, when constant-current source front-end circuit is short-circuit, tested end will appear from 5V voltages, now measure back
The maximum current on road is 5V/1K Ω=5mA, it is ensured that meet safe design requirement.1.5V the first constant pressure source measure 100 Ω with
During upper resistance, loop is tested by 2 500 Ω resistance R25 and R26 current-limiting resistances in series of Control, due to 1.5V
The first constant voltage power supply circuit to measure in itself be exactly 100 more than Ω resistance, when terminal shortcircuit before the first constant pressure source, tested end will appear from
5V voltages, now the maximum current of measuring loop is 5V/1K Ω=5mA, it is ensured that meet safe design requirement.It is permanent with the second of 10V
When potential source measures 1M Ω above resistance, loop is tested by Control resistance R32 and R33 current-limiting resistance in series, by
It is exactly 1M Ω above resistance to be measured in itself in the second constant voltage power supply circuit, and when terminal shortcircuit before the second constant pressure source, tested end will appear from
12V voltages, now the maximum current of measuring loop is 12V/115K Ω=0.104mA, it is ensured that meet safe design requirement.
Brief description of the drawings
Fig. 1 is structured flowchart of the invention.
Fig. 2 is constant-current source circuit, the first constant voltage power supply circuit, the second constant voltage power supply circuit, relay switch control interface in Fig. 1
The circuit diagram of circuit.
Fig. 3 is the circuit diagram of A/D sample circuits in Fig. 1.
Fig. 4 is the circuit diagram of the relay drive circuit of the present invention.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Opened as shown in figure 1, the present invention includes constant-current source circuit, the first constant voltage power supply circuit, the second constant voltage power supply circuit, relay
Close control interface, microprocessor, A/D sample circuits, power circuit, calibration interface and host computer, constant-current source circuit it is defeated
Go out end, the output end of the first constant voltage power supply circuit, the output end of the second constant voltage power supply circuit through relay switch control interface
After connect test product, the input of A/D sample circuits is connected with test product, and the voltage of test product is flowed through for measuring
Value, the output of A/D sample circuits is connected to microprocessor, and microprocessor is connected with relay switch control interface, relay
Device switch control interface circuit connects calibration interface, and power circuit is connected with microprocessor, and working power is provided to microprocessor,
Microprocessor is carried out data transmission by telecommunication circuit with host computer.
As shown in Fig. 2 the constant-current source circuit output current is 2.5mA, it includes the first power reference chip and first
Operational amplifier, the first power reference chip uses the LT1009CZ-2.5V power reference chips of Linear Tech, and the first computing is put
Big device uses AD8571, and the output end of the first power reference chip is connected with the input of the first operational amplifier, the first computing
The output end of amplifier is connected with relay switch control interface.AD8571 chips are current precision property highest computings
One of amplifier, maximum is 25 μ V to its offset voltage at room temperature, and the maximum of offset voltage drift is 0.1 μ V/ DEG C, open loop
Gain maintains 12V/ μ V, CMRR minimum value for 130dB, and PSRR minimum values are 115dB, and its specifications parameter ensures that closed loop gain should
Accurate performance in, meets Constant Current-Source Design requirement.
The first constant voltage power supply circuit output voltage is 1.5V, and it includes second source fiducial chip and the second operation amplifier
Device, second source fiducial chip uses the LT1009CZ-2.5V power reference chips of Linear Tech, and the second operational amplifier is used
OP07, the output end of second source fiducial chip is connected with the input of the second operational amplifier, the second operational amplifier it is defeated
Go out end with relay switch control interface to be connected.
The second constant voltage power supply circuit output voltage is 10V, and it includes the 3rd power reference chip, the 3rd power reference core
Piece uses the LM4040A10 power reference chips of TI companies, and output end and the relay switch of the 3rd power reference chip are controlled
Interface circuit is connected.
Test product is connect by test adaptor cable connection to relay switch control interface, relay switch control
Mouth circuit first switches to constant-current source circuit and measured, and measured value is sent after the conversion of A/D sample circuits by level conversion
Enter microprocessor, measured value is sent into host computer, host computer by communication cable after microprocessor computing and is shown and is tied
Fruit interpretation.If measured value exceedes the range of constant-current source circuit, relay switch control interface is sequentially switched to 1.5V's
Second constant voltage power supply circuit of the first constant voltage power supply circuit, 10V, until measured value is in range ability.
As shown in figure 3, A/D sample circuits are used to measuring controlled constant-current source or produced by constant pressure source flows through test product
Magnitude of voltage, the ADS1243 chips by design alternative, system is used as by gathering the chip two-way analog input channel difference value
Measures conversion value, LT6655 chips give ADS1243 chips provide 2.5V reference voltages, LVXC3245 chips realize ADS1243 and
The level conversion of data communication between microprocessor.
8 road relay drive circuits are as shown in figure 4, port selection the cutting by microprocessor control relay of test product
Completion is brought, microcontroller control signals complete driving conversion by ULN2803A chips, realize the driving to relay.The core
Comprising 8 NPN Darlington driving tubes inside piece, with high withstand voltage, the characteristics of high current, it is adaptable to low logic level digital circuit
Interface between higher current/voltage, all passages have open collector output and afterflow clamp diode, can press down
Transition processed, and 1 can drive 8 relays.Whole system has 427 points, and each point needs 2 Controls thereon
The access of lower end, therefore system drive interface circuit needs 854 driving relays altogether.
Claims (8)
1. a kind of portable electric parameter intelligent detector, it is characterised in that：Including constant-current source circuit, the first constant voltage power supply circuit,
Two constant voltage power supply circuits, relay switch control interface, microprocessor, A/D sample circuits, power circuit, calibration interface and
Host computer, the output end of constant-current source circuit, the output end of the first constant voltage power supply circuit, the output end of the second constant voltage power supply circuit pass through after
Test product is connected after electric switch control interface, the input of A/D sample circuits is connected with test product, for measuring
The magnitude of voltage of test product is flowed through, the output of A/D sample circuits is connected to microprocessor, and microprocessor is controlled with relay switch
Interface circuit is connected, relay switch control interface connection calibration interface, and power circuit is connected with microprocessor, to micro- place
Manage device and working power is provided, microprocessor is carried out data transmission by telecommunication circuit with host computer.
2. portable electric parameter intelligent detector according to claim 1, it is characterised in that：The constant-current source circuit output
Electric current is 2.5mA, and it includes the first power reference chip and the first operational amplifier, the output end of the first power reference chip with
The input of first operational amplifier is connected, output end and the relay switch control interface phase of the first operational amplifier
Even.
3. portable electric parameter intelligent detector according to claim 2, it is characterised in that：The first power reference core
Piece uses the LT1009CZ-2.5V power reference chips of Linear Tech, and the first operational amplifier uses AD8571.
4. portable electric parameter intelligent detector according to claim 1, it is characterised in that：First constant voltage power supply circuit
Output voltage is 1.5V, and it includes second source fiducial chip and the second operational amplifier, the output of second source fiducial chip
End is connected with the input of the second operational amplifier, output end and the relay switch control interface of the second operational amplifier
It is connected.
5. portable electric parameter intelligent detector according to claim 4, it is characterised in that：The second source benchmark core
Piece uses the LT1009CZ-2.5V power reference chips of Linear Tech, and the second operational amplifier uses OP07.
6. portable electric parameter intelligent detector according to claim 1, it is characterised in that：Second constant voltage power supply circuit
Output voltage is 10V, and it includes the 3rd power reference chip, and output end and the relay switch of the 3rd power reference chip are controlled
Interface circuit is connected.
7. portable electric parameter intelligent detector according to claim 6, it is characterised in that：The 3rd power reference core
Piece uses the LM4040A10 power reference chips of TI companies.
8. portable electric parameter intelligent detector according to claim 1, it is characterised in that：The A/D sample circuits
Master chip uses ADS1243.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710681474.0A CN107247188A (en) | 2017-08-10 | 2017-08-10 | A kind of portable electric parameter intelligent detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710681474.0A CN107247188A (en) | 2017-08-10 | 2017-08-10 | A kind of portable electric parameter intelligent detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107247188A true CN107247188A (en) | 2017-10-13 |
Family
ID=60012678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710681474.0A Pending CN107247188A (en) | 2017-08-10 | 2017-08-10 | A kind of portable electric parameter intelligent detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107247188A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152594A (en) * | 2018-01-29 | 2018-06-12 | 中国工程物理研究院电子工程研究所 | A kind of constant-current source tester |
| CN110763908A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter |
| CN108152594B (en) * | 2018-01-29 | 2024-04-19 | 中国工程物理研究院电子工程研究所 | Constant current source tester |
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-
2017
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152594A (en) * | 2018-01-29 | 2018-06-12 | 中国工程物理研究院电子工程研究所 | A kind of constant-current source tester |
| CN108152594B (en) * | 2018-01-29 | 2024-04-19 | 中国工程物理研究院电子工程研究所 | Constant current source tester |
| CN110763908A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter |
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