CN109557455A - A kind of product testing system - Google Patents
A kind of product testing system Download PDFInfo
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- CN109557455A CN109557455A CN201811515062.0A CN201811515062A CN109557455A CN 109557455 A CN109557455 A CN 109557455A CN 201811515062 A CN201811515062 A CN 201811515062A CN 109557455 A CN109557455 A CN 109557455A
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- 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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
Abstract
The present invention provides a kind of product testing systems, comprising: power circuit, processing circuit, multiplexer circuit, Acquisition Circuit and telecommunication circuit；Processing circuit is sent to circuit board under test for generating test signal, and by test signal；The input terminal of multiplexer circuit is connected with circuit board under test, and the output end of multiplexer circuit is connected with the input terminal of Acquisition Circuit, and the signal all the way corresponded in circuit board under test all the way in multiplexer circuit；The output end of Acquisition Circuit is connected with the collection terminal of processing circuit；Processing circuit is also used to judge whether output signal is correct according to digital signal, generates corresponding test result, and test result is sent to external equipment by telecommunication circuit.The product testing system provided through the embodiment of the present invention can save the port resource of processing circuit, while can reduce the quantity of Acquisition Circuit, save cost, improve the service efficiency of Acquisition Circuit, and improve the accuracy of testing efficiency and test.
Description
Technical field
The present invention relates to product test technical fields, in particular to a kind of product testing system.
Background technique
Currently, the Intelligent lamp produced on the market is embedded in core circuit plate, needed after these board productions are good
It can be just assembled among lamps and lanterns by test, therefore testing process is extremely important, concerning the performance for arriving product.It generally adopts at present
The mode manually tested is easy to bring error by artificial detection, and the accuracy of detection is poor.
Summary of the invention
To solve the above problems, the embodiment of the present invention is designed to provide a kind of product testing system.
The embodiment of the invention provides a kind of product testing systems, comprising: power circuit, processing circuit, multi-path choice electricity
Road, Acquisition Circuit and telecommunication circuit；
The power circuit is connected with the power end of the processing circuit, for powering to the processing circuit；
The test signal is sent to electricity to be measured by test interface for generating test signal by the processing circuit
Road plate；The input terminal of the multiplexer circuit is connected with the circuit board under test, the output end of the multiplexer circuit with
The input terminal of the Acquisition Circuit is connected, and the multiplexer circuit is used to select to transmit the output signal of the circuit board under test
To Acquisition Circuit, and the signal all the way corresponded in the circuit board under test all the way in the multiplexer circuit；The processing
The control terminal of circuit is connected with the gated end of the multiplexer circuit, for controlling the access for gating the multiple selector；
The output end of the Acquisition Circuit is connected with the collection terminal of the processing circuit, and the Acquisition Circuit is used for will be described
The output signal of multiplexer circuit selection transmission is converted to digital signal and is sent to the processing circuit；The processing
Circuit is also used to judge according to the digital signal whether the output signal is correct, generates corresponding test result, and pass through
The test result is sent to external equipment by the telecommunication circuit.
A kind of product testing system provided in an embodiment of the present invention generates test signal by processing circuit, and according to be measured
The output signal of circuit generates test result, it is ensured that consistency；The output of circuit board under test is obtained using multiple selector
Signal can save the port resource of processing circuit, while can reduce the quantity of Acquisition Circuit, saved cost, improved
The service efficiency of Acquisition Circuit, and improve the accuracy of testing efficiency and test.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 shows the first structure figure of product testing system provided by the embodiment of the present invention；
Fig. 2 shows the second structure charts of product testing system provided by the embodiment of the present invention；
Fig. 3 shows a kind of circuit diagram of second level selection circuit provided by the embodiment of the present invention；
Fig. 4 shows a kind of circuit diagram of power circuit provided by the embodiment of the present invention；
Fig. 5 shows a kind of circuit diagram of protection circuit provided by the embodiment of the present invention；
Fig. 6 shows a kind of circuit diagram of ESD circuit provided by the embodiment of the present invention.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
A kind of product testing system provided in an embodiment of the present invention, it is shown in Figure 1, comprising: power circuit 10, processing electricity
Road 20, multiplexer circuit 30, Acquisition Circuit 40 and telecommunication circuit 50.
Wherein, power circuit 10 is connected with the power end of processing circuit 20, for powering to processing circuit 20；Power supply electricity
External power supply can be specifically converted to the operating voltage for being suitble to this test macro by road, and battery or reserve battery can also be arranged
Deng, be directly by battery test macro power supply.
Processing circuit 20 is sent to circuit board under test for signal is tested for generating test signal, and by test interface.
The input terminal of multiplexer circuit 30 is connected with circuit board under test, and the output end of multiplexer circuit 20 is defeated with Acquisition Circuit 40
Enter end to be connected, which is used to acquire the output signal of circuit board under test, and one in multiplexer circuit 30
Road corresponds to the signal all the way in circuit board under test；The control terminal of processing circuit 20 is connected with the gated end of multiplexer circuit 30,
For controlling the access of gating multiple selector.
The output end of Acquisition Circuit 40 is connected with the collection terminal of processing circuit 20, and Acquisition Circuit 40 is used for multi-path choice electricity
The output signal of the selection transmission of road 30 is converted to digital signal and is sent to processing circuit 20；Processing circuit 20 is also used to according to number
Word signal judges whether output signal is correct, generates corresponding test result, and send test result by telecommunication circuit 50
To external equipment.
In the embodiment of the present invention, processing circuit 20 is connected by test interface with circuit board under test, and the test interface is specific
But chip I/O interface；For test signal for testing circuit board under test, which specifically can be PWM (Pulse
Width Modulation, pulse width modulation) signal, after circuit board under test receives test signal, the electricity in circuit board under test
Road conducting, and then can export corresponding output signal, the output signal is transmitted to later be connected with circuit board under test it is more
Road selection circuit 30.Due to the possible outputting multiplex signals of circuit board under test, therefore multiple selector 30 is used in the embodiment of the present invention
Realize the connection with circuit board under test, (the choosing of the control multiplexer circuit 30 of processing circuit 20 under the control of processing circuit 20
Go side), the signal that circuit board under test exports successively is selectively input to Acquisition Circuit 40, final Acquisition Circuit 40 will acquisition
As a result it is input to processing circuit 20, and then can be detected the more of circuit board under test using the fewer port resource of processing circuit 20
Road signal.Telecommunication circuit 50 can specifically make radio communication circuit, wire communication circuit or communication interface etc., it is only necessary to Ke Yichuan
Defeated test result；For example test result can be sent to outer computer, or be transmitted to and be connected with processing circuit 20
Display screen to show test result.
A kind of product testing system provided in an embodiment of the present invention generates test signal by processing circuit, and according to be measured
The output signal of circuit generates test result, it is ensured that consistency；The output of circuit board under test is obtained using multiple selector
Signal can save the port resource of processing circuit, while can reduce the quantity of Acquisition Circuit, saved cost, improved
The service efficiency of Acquisition Circuit, and improve the accuracy of testing efficiency and test.
On the basis of the above embodiments, shown in Figure 2, processing circuit 20 is main including primary processor and from processor
Processor is connected with from processor by I/O interface.
In the embodiment of the present invention, since not enough, therefore primary processor and from may be arranged in the port resource of single-ended processor
Device is managed to increase port resource, so that system testing can be met using the few processor of several (such as two) port resources
Demand.Primary processor and different functions is executed from processor, than as shown in Fig. 2, by generating test signal, main from processor
It manages device and test result is generated according to the output signal of acquisition.
On the basis of the above embodiments, shown in Figure 2, multiplexer circuit 30 includes level-one selection circuit and second level
Selection circuit.Wherein, second level selection circuit is used to acquire the output signal of circuit board under test, and in second level selection circuit all the way
Signal all the way in corresponding circuit board under test；One input terminal phase of the output end of second level selection circuit and level-one selection circuit
Even, the output end of level-one selection circuit is connected with the input terminal of Acquisition Circuit 40.
In the embodiment of the present invention, level-one selection circuit and second level selection circuit are a kind of gating circuit, specifically be can be
Multiple selector, for example 4 select 1 selector, 8 to select 1 selector etc., such as DG408, passes through the selection port of control multiple selector
Realize the data of output respective channels to data port.By taking 8 select 1 selector as an example, a kind of circuit of second level selection circuit is illustrated
Scheme shown in Figure 3, in Fig. 3,8 to select S1~S8 in 1 selector U1 be input terminal, and the output for accessing circuit board under test is believed
Number, S8 is had disabled in Fig. 3, that is, only accesses 7 tunnel output signals.Wherein, 3V3_01 and 35V_01 is for testing circuit board under test
3.3V,35V；Processing circuit 20 can export 5 kinds of test signals to circuit board under test, and testing signal is respectively PWM1~PWM5,
The output voltage of wiring board to be measured is expressed as PWM11~PWM51 when corresponding test signal, i.e. S3~S7 in Fig. 3 accesses PWM1
Corresponding electricity when corresponding voltage, PWM4 are exported when corresponding voltage, PWM3 output when corresponding voltage, PWM2 output when output
Corresponding voltage when pressure, PWM5 output.EN is enable end, specifically can export enable signal EN1 by processing circuit 20 to control
The second level selection circuit is started to work, post processing circuitry 20 controlled by selection port A0, A1, A2 by which in S1~S7
Road is connected with data terminal D, i.e., data AD1 is transmitted to the respective input of level-one selection circuit by data terminal D.Level-one selection
The working principle of circuit is similar with the working principle of second level selection circuit, is not repeated herein.
In the embodiment of the present invention, by multistage selection circuit, can times several levels increase connecing for collectable circuit board under test
Mouth quantity, further reduces the cost.
In the above-described embodiments, shown in Figure 4, power circuit 10 includes: DC-DC converter U2, first resistor R1,
Two resistance R2,3rd resistor R3, first capacitor C1 and the second capacitor C2.
Specifically, the input terminal of DC-DC converter, for inputting the first DC voltage V1, output end is straight for exporting second
Galvanic electricity presses V2；One end of first capacitor C1 is connected with the feedback end of DC-DC converter, other end ground connection；The one of first resistor R1
End is connected with the feedback end of DC-DC converter, and the other end of first resistor R1 is in parallel by second resistance R2 and the second capacitor C2
It is connected after the parallel circuit of composition with the port of the second DC voltage of output；And the other end of first resistor R1 also with 3rd resistor
One end of R3 is connected, the other end ground connection of 3rd resistor R3.
In the embodiment of the present invention, DC-DC converter U2 for realizing direct current conversion, to meet the test macro to electricity
The demand of pressure.Further, also settable multiple similar power circuits are to provide further types of voltage, for example, 24V turns
15V, 15V turn 12V, 15V and turn 10V, 12V to turn 5V etc..In the embodiment of the present invention, capacitor is introduced in the feedback end of DC-DC converter
C1 and C2, for promoting the stability of DC-DC；Specifically, first capacitor C1 is connect with feedback end FB can play the role of decoupling, the
Two capacitor C2 parallel resistance R2, the voltage signal that can reduce on the feedback loop that R2 and R1 is constituted fluctuates, to improve stability.
Output voltage values can be changed by adjusting the resistance value of R1, R2, R3；And R21, R22, C13, C14 etc. in circuit are using DC-DC
Conventional design when converter, does not herein repeat them here it.
On the basis of the above embodiments, shown in Figure 2, the system further include: protection circuit 60；Multiplexer circuit
30 input terminal realizes the guarantor to the test macro by protection circuit 60 by protecting circuit 60 to be connected with circuit board under test
Shield.
Specifically, shown in Figure 5, protection circuit 60 includes: rectifier bridge D10, the 4th resistance R4, the 5th resistance R5, the
Six resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, field-effect tube Q1 and triode Q2.
The input terminal of rectifier bridge D10 is connected with circuit board under test, for accessing the output signal of circuit board under test (in Fig. 5
Indicated with PWM_111), the output end of rectifier bridge is connected with the drain electrode of field-effect tube Q1；4th resistance R4 and the 5th resistance R5 group
At one end of series circuit be connected with the output end of rectifier bridge, the other end ground connection；One end of 6th resistance R6 and the 4th resistance
Connecting node between R4 and the 5th resistance R5 is connected, and the other end of the 6th resistance R6 is connected with the base stage of triode Q2.Three poles
The collector of pipe Q2 is connected with the grid of field-effect tube Q1, the emitter ground connection of triode Q2；A termination electricity of 7th resistance R7
Source, the other end are connected with the collector of triode Q2；8th resistance R8 and the 9th resistance R9 composition series circuit one end with
The source electrode of field-effect tube Q1 is connected, other end ground connection；Connecting node and multichannel between 8th resistance R8 and the 9th resistance R9 are selected
The input terminal for selecting circuit 30 is connected, for sending safe output signal (with PWM11 table in Fig. 5 to multiplexer circuit 30
Show).
Since voltage pwm _ 111 of circuit board under test output may be negative value, therefore rectifier bridge is utilized in the embodiment of the present invention
D10 is translated into the direct current signal that signal polarity is positive always, and back-end circuit is protected not damaged by negative voltage, wherein 35V-_
01 indicates the ground of circuit board under test.Meanwhile the work of overvoltage protection is played using the circuit that field-effect tube Q1 and triode Q2 is formed
With.Specifically, triode Q2 is closed, and Q1 is connected at this time, and protection circuit normal transmission is defeated when the voltage of rectifier bridge output is normal
Signal out；When rectifier bridge output voltage is excessively high, the base voltage of triode Q2 is sufficiently large, so that Q2 is connected, to drag down Q1
Grid voltage, at this time Q1 disconnect, achieve the purpose that protect subsequent conditioning circuit.
On the basis of the above embodiments, system further include: ESD (release by Electro-Static Discharge, electrostatic
Put) circuit.Shown in Figure 6, ESD circuit includes: multiple resistance and multiple high frequency capacitances；Multiple resistance and multiple high frequency capacitances
One end of parallel circuit composed by being mutually in parallel is Electro-static Driven Comb end, other end ground connection.It is with four groups of resistance and capacitor in Fig. 6
Example is carrying out release consumption by resistance in parallel therewith by capacitive absorption electrostatic, to reach the mesh of protection circuit system
's.The mode of ESD circuit low cost provides electrostatic leakage channel, effectively protects circuit system.
On the basis of the above embodiments, shown in Figure 2, the system further include: Hall current sensor 70.Hall electricity
The input terminal of flow sensor 70 is used to acquire the current signal of circuit board under test, and output end is connected with Acquisition Circuit 40, by adopting
The signal of acquisition is switched to digital signal and is handled by processing circuit by collector 40.
In the embodiment of the present invention, which also tests the electric current of circuit board under test while test voltage.Specifically
, Hall current sensor, which is connected, can test electric current into circuit, and the current value of test can be in the form of a voltage defeated
Outlet output, Acquisition Circuit 40 acquire sensor output voltage, post processing circuitry be based on the voltage value can analyze
The size of electric current.Wherein, shown in Figure 2, the input of Hall current sensor 70 is connected with the output on the road multichannel Xuan Zeidan 30,
Corresponding electric current is acquired using the output of multiplexer circuit 30.
On the basis of the above embodiments, shown in Figure 2, the system further include: buzzer 80；Buzzer 80 and processing
Circuit 20 is connected, and the work of buzzer is controlled by processing circuit 20.For example, test terminates every time, processing circuit controls buzzer
Sending pipes, and reminds tester that test terminates.
On the basis of the above embodiments, shown in Figure 2, the system further include: product information memory interface 90；Product
Information memory interface 90 is connected with processing circuit 20, for providing test data to external equipment.It is stored using the production measurement information
Interface 90 may be implemented to obtain the test data information of circuit board under test by serial ports and be recorded, and can also pass through network interface later
PC is connected to read production measured data, to realize that product producing line tracks.
On the basis of the above embodiments, shown in Figure 2, the system further include: LED indicating circuit 100；LED indication
Circuit 100 is connected with processing circuit 20, realizes the control to LED indicating circuit by processing circuit.For example, can use red green
LED light indicates system test result, and when being completed and test data is normal, green light (G) is bright, when test data is abnormal
When red light (R) it is bright.
A kind of product testing system provided in an embodiment of the present invention generates test signal by processing circuit, and according to be measured
The output signal of circuit generates test result, it is ensured that consistency；The output of circuit board under test is obtained using multiple selector
Signal can save the port resource of processing circuit, while can reduce the quantity of Acquisition Circuit, improve making for Acquisition Circuit
With efficiency, cost has been saved.Port resource is increased using the connection type of principal and subordinate processor, system is can satisfy and more surveys
Examination demand.By multistage selection circuit, can times several levels increase the interface quantity of collectable circuit board under test, further decrease
Cost.Feedback section in a power introduces capacitor, and the stability of power supply can be improved；By protecting circuit to avoid rear end electric
Road is damaged by negative voltage or high voltage, can achieve the purpose of protection subsequent conditioning circuit.The mode of ESD circuit low cost provides
Electrostatic leakage channel, effectively protects circuit system.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of product testing system characterized by comprising power circuit, processing circuit, multiplexer circuit, acquisition electricity
Road and telecommunication circuit；
The power circuit is connected with the power end of the processing circuit, for powering to the processing circuit；
The test signal is sent to circuit under test by test interface for generating test signal by the processing circuit
Plate；The input terminal of the multiplexer circuit is connected with the circuit board under test, the output end of the multiplexer circuit and institute
The input terminal for stating Acquisition Circuit is connected, and the multiplexer circuit is used to select to transmit outputing signal to for the circuit board under test
The Acquisition Circuit, and the signal all the way corresponded in the circuit board under test all the way in the multiplexer circuit；The place
The control terminal of reason circuit is connected with the gated end of the multiplexer circuit, for controlling the logical of the gating multiple selector
Road；
The output end of the Acquisition Circuit is connected with the collection terminal of the processing circuit, and the Acquisition Circuit is used for the multichannel
The output signal of selection circuit selection transmission is converted to digital signal and is sent to the processing circuit；The processing circuit
It is also used to judge according to the digital signal whether the output signal is correct, generates corresponding test result, and by described
The test result is sent to external equipment by telecommunication circuit.
2. system according to claim 1, which is characterized in that the processing circuit includes primary processor and from processor,
The primary processor is connected from processor by I/O interface with described.
3. system according to claim 1, which is characterized in that the multiplexer circuit includes level-one selection circuit and two
Grade selection circuit；
The second level selection circuit is used to acquire the output signal of the circuit board under test, and one in the second level selection circuit
Road corresponds to the signal all the way in the circuit board under test；
The output end of the second level selection circuit is connected with an input terminal of the level-one selection circuit, the level-one selection electricity
The output end on road is connected with the input terminal of the Acquisition Circuit.
4. system according to claim 1, which is characterized in that the power circuit includes: DC-DC converter, the first electricity
Resistance, second resistance, 3rd resistor, first capacitor and the second capacitor；
The input terminal of the DC-DC converter is for inputting the first DC voltage, and output end is for exporting the second DC voltage；
One end of the first capacitor is connected with the feedback end of the DC-DC converter, other end ground connection；The first resistor
One end is connected with the feedback end of the DC-DC converter, and the other end of the first resistor passes through the second resistance and described
It is connected after the parallel circuit that second capacitor composes in parallel with the port for exporting second DC voltage；And the first resistor
The other end is also connected with one end of the 3rd resistor, the other end ground connection of the 3rd resistor.
5. system according to claim 1, which is characterized in that further include: protection circuit；The multiplexer circuit it is defeated
Enter end to be connected by the protection circuit with the circuit board under test；The protection circuit includes: rectifier bridge, the 4th resistance,
Five resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, field-effect tube and triode；
The input terminal of the rectifier bridge is connected with the circuit board under test, the output end of the rectifier bridge and the field-effect tube
Drain electrode is connected；The one end for the series circuit that 4th resistance is formed with the 5th resistance and the output end phase of the rectifier bridge
Even, other end ground connection；One end of 6th resistance and the connecting node phase between the 4th resistance and the 5th resistance
Even, the other end of the 6th resistance is connected with the base stage of the triode；
The collector of the triode is connected with the grid of the field-effect tube, the emitter ground connection of the triode；Described
One termination power of seven resistance, the other end are connected with the collector of the triode；
8th resistance is connected with the one end for the series circuit that the 9th resistance forms with the source electrode of the field-effect tube, separately
One end ground connection；Connecting node and the input terminal phase of the multiplexer circuit between 8th resistance and the 9th resistance
Even.
6. system according to claim 1, which is characterized in that further include: ESD circuit；The ESD circuit includes: multiple
Resistance and multiple high frequency capacitances；Multiple resistance and multiple high frequency capacitances be mutually in parallel composed by parallel circuit one end be electrostatic
Release end, other end ground connection.
7. system according to claim 1, which is characterized in that further include: Hall current sensor；
The input terminal of the Hall current sensor is used to acquire the current signal of circuit board under test, output end and acquisition electricity
Road is connected.
8. system according to claim 1, which is characterized in that further include: buzzer；The buzzer and processing electricity
Road is connected.
9. system according to claim 1, which is characterized in that further include: product information memory interface；The product information
Memory interface is connected with the processing circuit, for providing test data to external equipment.
10. system according to claim 1, which is characterized in that further include: LED indicating circuit；
The LED indicating circuit is connected with the processing circuit.
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| CN201811515062.0A CN109557455A (en) | 2018-12-12 | 2018-12-12 | A kind of product testing system |
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| CN114336566A (en) * | 2021-11-22 | 2022-04-12 | 珠海格力电器股份有限公司 | Circuit structure for realizing universal wiring terminal |
| CN117452190A (en) * | 2023-12-22 | 2024-01-26 | 合肥联宝信息技术有限公司 | Signal testing circuit, method and storage medium |
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Application publication date: 20190402 |