CN104459514A - I/O port logical detection method and system - Google Patents
I/O port logical detection method and system Download PDFInfo
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- CN104459514A CN104459514A CN201410611749.XA CN201410611749A CN104459514A CN 104459514 A CN104459514 A CN 104459514A CN 201410611749 A CN201410611749 A CN 201410611749A CN 104459514 A CN104459514 A CN 104459514A
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Abstract
The invention belongs to the technical field of circuit detection and relates to an I/O port logical detection method and system. The system comprises a system power source used for supplying electric energy for the system and further comprises a control unit. The control unit is connected with an output control port, a detection input port and a detection power supply port. The control unit is connected with a man-machine interaction terminal which is provided with a liquid crystal display screen used for displaying a detection result and a plurality of modulation buttons used for input setting. Due to the fact that programming parameters are set and microprocessor comparison detection is conducted, the problems that the detecting and maintaining time of a circuit board is too long and high dependency on the correlated technical experience of detection personnel exists are solved, the detection time is shortened, the detection efficiency is improved, and labor cost and equipment cost are greatly reduced.
Description
Technical field
The invention belongs to electric circuit inspection technical field, relate to a kind of test circuit system, be specifically related to a kind of I/O port logic detection method and detection system.
Background technology
Popularizing fast along with electronic product, Automated condtrol gos deep into every field all the more, and the manufacturing cost of electronic product is also more and more lower, and this makes quite a few medium and small manufacturer be entered electronics product manufacturing industry.In automation control system, control circuit board is as system core parts, and its use amount also grows with each passing day, and along with the increase of output, just arises at the historic moment for the factory testing of control circui board finished product, the related needs such as failture evacuation and maintenance.At present, circuit board finished product detection after element welding and maintenance are that the professional by having correlation technique experience is undertaken judging by technical Analysis mostly, detection may can be completed within the time of a few minutes for knowing the personnel knowing circuit board detecting mode, if change the maintenance personal lacked experience into, then may need to spend the more time to detect, further, for the control circuit board of every a different model, testing staff must accept to detect training again.
And, in general, be usually made up of input I/O port, control circuit board, output I/O port for the electronic product controlling class.Input port is used for gathering the various switching values of peripheral circuit, control circuit board produces corresponding output logic signal by the logical operation rule designed, output port for driving other peripheral circuit, as motor, relay, solenoid valve, relay etc.
Can complete above-mentioned functions, be the acceptable criterion identifying this control of product circuit board.The I/O port of the usual device fabrication chamber of commerce to this control circuit board carries out necessary Function detection, but often because the control circuit board model of manufacturer's production is various, input/output port logic is different, for the design of certain single product or special inspecting equipment can not be bought to reduce costs, therefore the means of manual detection can only generally be used, now carrying out above test needs the multiple external unit manual inspection such as motor, optoelectronic switch, multimeter just can complete, also reduce detection efficiency while increasing recruitment cost, easily occur situation that is undetected, false retrieval.
Summary of the invention
The object of the invention is to overcome circuit board detecting in prior art and servicing time is long and highly rely on the problem of testing staff's correlation technique experience.
For this reason, the invention provides a kind of I/O port logic detection method, comprise the following steps,
Step one: arrange
According to the information setting detection scheme of circuit-under-test plate, content comprise power supply voltage select, detection scheme sequence number is set, arrange each control be supplied to opportunity circuit board input logic signal, arrange each control opportunity maintenance delay time, contrast logic signal levels is set;
Step 2: detect
1) power to circuit-under-test plate according to the power supply voltage arranged in step one, and detect successively according to the detection scheme sequence number arranged in step one;
2) in single detection scheme, first to the input logic signal that the input port input of circuit-under-test plate sets, and guarantee that circuit-under-test plate receives one group of correct input logic signal;
3) keep above-mentioned input logic signal, the retention time is the maintenance delay time set in step one;
4) under the effect of above-mentioned input logic signal, circuit-under-test plate exports logic signal levels circuit-under-test plate needing the check point detected, and reads the logic signal levels that circuit-under-test plate exports;
5) the contrast logic signal levels that the logic signal levels exported by the circuit-under-test plate read in upper step and this detection sets opportunity contrasts, if unanimously, then judges the detection of this check point normally, enters next check point; If result is inconsistent, then judges that this circuit-under-test plate is abnormal, simultaneously detection of end, and will occur that the input/output port of varying level signal shows, show that this tested circuit board breaks down;
6) as the detection by previous step, then as the next input logic signal of circuit-under-test plate, next check point is detected, so circulates, until last check point in this detection scheme completes, show that this circuit-under-test plate have passed the detection of this detection scheme.
Time detection scheme in step 2 arranges and is no less than one, after single detection scheme is by detection, automatically enter the detection of next detection scheme, until all detection schemes are all done, finally draw the conclusion by test.
When the contrast logic signal levels that logic signal levels detected by any one detection opportunity in step 2 and this detection set opportunity is inconsistent, all be judged to be fault, stop immediately after there is this kind of situation detecting, stop detecting, and detection is occurred that the port of rub-out signal shows.
Present invention also offers a kind of I/O port logic detection system being applicable to above-mentioned I/O port logic detection method, comprise the system power supply for being supplied to system power, also comprise a control module, this control module is connected with output control terminal mouth, detects input port and detects power supply port, described control module is connected to human-computer interaction terminal, this human-computer interaction terminal is provided with the LCDs for showing testing result and the multiple modulation buttons for inputting.
Described control module is single-chip microcomputer.
Described output control terminal mouth, detection input port and detection power supply port are optoelectronic switch.
Beneficial effect of the present invention:
(1) this I/O port logic detection method provided by the invention and detection system, the input signal of circuit-under-test plate is controlled by control module, and automatically complete the output signal of each detection circuit-under-test on opportunity plate, contrast, instead of manual detection, owing to using microprocessor to complete detecting step, save detection time in time, improve detection efficiency;
(2) out of order detected circuit plate is additionally provided to opportunity and the non-working port information of fault appearance, guide cause and the position of fault on maintenance personal's decision circuitry plate, therefore can improve the complete of faulty circuit plate and repair rate;
(3) this detection system can be arranged by man-machine interface and provide that different logic level exports, output level retention time and logic level input contrast, therefore this detection system can detect dissimilar control circuit board by simply arranging, and reduces checkout equipment cost;
(4) namely the scheme that this detection system sets is kept in the storage unit of microprocessor, does not have relevant speciality background personnel only can need test according to the method for inspection, reduces quality demand and the training time of reviewer, significantly reduces cost of labor.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is detection system principle schematic of the present invention.
Fig. 2 is detection system detection scheme setting procedure figure of the present invention.
Fig. 3 is detection system overhaul flow chart of the present invention.
Fig. 4 is the testing process process flow diagram of detected circuit plate.
Description of reference numerals: 1, control module; 2, output control terminal mouth; 3, input port is detected; 4, power supply port is detected; 5, human-computer interaction terminal; 6, LCDs; 7, button is modulated; 8, output port connection terminal; 9, input port connection point terminal; 10, supply lines terminal.
Embodiment
Embodiment 1:
In view of existing circuit board detecting and maintenance highly rely on the correlation technique experience of testing staff, cause the situation that circuit board detecting efficiency is lower, cost is higher, the invention provides a kind of I/O port logic detection method, comprise the following steps,
Step one: arrange
According to the information setting detection scheme of circuit-under-test plate, content comprise power supply voltage select, detection scheme sequence number is set, arrange each control be supplied to opportunity circuit board input logic signal, arrange each control opportunity maintenance delay time, contrast logic signal levels is set;
Step 2: detect
1) power to circuit-under-test plate according to the power supply voltage arranged in step one, and detect successively according to the detection scheme sequence number arranged in step one;
2) in single detection scheme, first to the input logic signal that the input port input of circuit-under-test plate sets, and guarantee that circuit-under-test plate receives one group of correct input logic signal;
3) keep above-mentioned input logic signal, the retention time is the maintenance delay time set in step one;
4) under the effect of above-mentioned input logic signal, circuit-under-test plate exports logic signal levels circuit-under-test plate needing the check point detected, and reads the logic signal levels that circuit-under-test plate exports;
5) the contrast logic signal levels that the logic signal levels exported by the circuit-under-test plate read in upper step and this detection sets opportunity contrasts, if unanimously, then judges the detection of this check point normally, enters next check point; If result is inconsistent, then judges that this circuit-under-test plate is abnormal, simultaneously detection of end, and will occur that the input/output port of varying level signal shows, show that this tested circuit board breaks down;
6) as the detection by previous step, then as the next input logic signal of circuit-under-test plate, next check point is detected, so circulates, until last check point in this detection scheme completes, show that this circuit-under-test plate have passed the detection of this detection scheme.
Time detection scheme in step 2 arranges and is no less than one, after single detection scheme is by detection, automatically enter the detection of next detection scheme, until all detection schemes are all done, finally draw the conclusion by test.
When the contrast logic signal levels that logic signal levels detected by any one detection opportunity in step 2 and this detection set opportunity is inconsistent, all be judged to be fault, stop immediately after there is this kind of situation detecting, stop detecting, and detection is occurred that the port of rub-out signal shows.
This method is all applicable for nearly all circuit board, testing staff only needs in advance to complete overall testing process easily to the confirmation that circuit-under-test plate carries out parameter, save detection time, improve detection efficiency, reduce checkout equipment cost, obviously can reduce for the quality demand of reviewer and training time simultaneously, significantly reduce cost of labor.
Embodiment 2:
For above-mentioned I/O port logic detection method, the present invention also proposes a kind of I/O port logic detection system being applicable to above-mentioned detection method, as shown in Figure 1, comprise the system power supply for being supplied to system power, also comprise a control module 1, control module 1 is single-chip microcomputer, and this control module 1 is connected with output control terminal mouth 2, detects input port 3 and detects power supply port 4, and output control terminal mouth 2, detection input port 3 and detection power supply port 4 are optoelectronic switch;
Control module 1 is connected to human-computer interaction terminal 5, this human-computer interaction terminal 5 is provided with the LCDs 6 for showing testing result and the multiple modulation buttons 7 for inputting; Output control terminal mouth 2 place is provided with output port connection terminal 8, detects input port 3 place and is provided with input port connection point terminal 9, detects power supply port 4 place and is provided with supply lines terminal 10.
The present invention is a kind of I/O port logic detection method and detection system, can be arranged, thus detect by human-computer interaction terminal 5 pairs of control ports and input detection signal contrast level.When certain control circuit board of primary detection, need to carry out detection scheme design to it, therefore need the normal workflow knowing this circuit board, control inputs port signal, detection opportunity are set according to demand and detect output port contrast signal.
Wherein relate to human-computer exchange technology; along with popularizing of intelligent terminal; this technology has obtained ripe application in a lot; the window system that human-computer exchange technology utilizes and user interface management system can be applied simply in the present invention; but do not belong to the content of the present invention's protection, do not illustrate at this.
Sum up a kind of I/O port logic detection method according to said structure the present invention, comprise the following steps,
First output control terminal mouth 2 is connected to the input control signal port of circuit-under-test plate by output port connection terminal 8, detection input port 3 is connected to the output control signal port of circuit-under-test plate by input port connection point terminal 9, detection power supply port 4 is connected circuit-under-test plate by supply lines terminal 10 and powers.
Step one: optimum configurations,
Open system power supply, by the modulation button 7 in human-computer interaction terminal 5, detection scheme is set, content is set and comprises the selection of power supply voltage, detection scheme sequence number S101 is set, contrast logic signal levels S104 is set, the input logic signal S102 that each control should be supplied to circuit board opportunity is set, the maintenance delay time S103 that each controls opportunity is set.
As shown in Figure 2, all check points all need to set gradually in order, first arrange from first check point of first detection scheme, set gradually the steering logic signal in input logic signal and Fig. 2, keep delay time, contrast logic signal levels, if there is no other check points after setting up, then enter next detection scheme to arrange, if also have other check points, then set gradually each check point, controlled by the S106 in Fig. 2, until the check point in all schemes is all provided with.
Step 2: detect, as shown in Figure 3,
1) according to the power supply voltage arranged in step 2, power to circuit-under-test plate by detection power supply port 4 by supply lines terminal 10, and detect successively according to the detection scheme sequence number arranged in step 2;
2) in single detection scheme, start to detect a check point, as S201, S202 in Fig. 3, first control module 1 driver output control port 2 exports the input logic signal set, and such circuit-under-test plate just receives one group of correct input signal;
3) keep the logical signal of above-mentioned output, i.e. S203, the retention time is the maintenance delay time set in step 2;
4) under the effect of above-mentioned logical signal, circuit-under-test plate exports logic signal levels circuit-under-test plate needing the check point detected, read by detection input port 3 pairs of circuit-under-test plate output port logic signal levels, and pass to control module 1;
5) logic signal levels that control module 1 pair of logic signal levels and this detection set opportunity contrasts, and by contrast level signal, if unanimously, then judges that this check point detects normal, enters next check point, i.e. S207; If result is inconsistent, then judges that this circuit-under-test plate is abnormal, simultaneously detection of end, and in the LCDs 6 that the input/output port of varying level signal is presented in human-computer interaction terminal 5, show that this tested circuit board breaks down by occurring;
6) as the detection by previous step, then control module 1 exports next steering logic signal according to being arranged on next control opportunity, circulation like this, until last in this detection scheme has detected, has shown that this circuit-under-test plate have passed the detection of this detection scheme.
Time detection scheme in step 3 arranges and is no less than one, after single detection scheme is by detection, automatically enter the detection of next detection scheme, until all detection schemes are all done, i.e. S208, finally draws the conclusion S209 by test.
When the logic signal levels that logic level detected by any one detection opportunity in step 3 and this detection set opportunity is inconsistent, all be judged to be fault, stop immediately after there is this kind of situation detecting, jump out trace routine, and detection is occurred that the port of rub-out signal is clearly shown by man-machine interface.
Embodiment 3:
In order to understand testing process better, be described below in conjunction with concrete circuit board, Fig. 4 is the process flow diagram of the testing circuit plate of certain family expenses water-free toilet bowl control circuit board, comprises S301, S302, S303, S304, S306, S307, S308 totally 7 check points.
Composition graphs 2, Fig. 3 and Fig. 4, make an explanation:
For check point S301, arranging by a human-computer interaction terminal 5 output port connection terminal 8 value be connected with play button input port is 1, completes and arranges steering logic signal S102.Signalization keeps time delay S103, and default value is 20ms.Arranging detection input port 3 value be connected with relay indicating light control output end mouth is 1, completes detection contrast level and arranges S103.Whether arrange in next group detecting step S105 selects "Yes" to carry out the setting of next group detecting step again.
For check point S302, method to set up is substantially identical with above-mentioned setting steps, owing to there is no input control, then skip detection step arranges S102 and S103, directly arrange and detect contrast level, arranging detection input port 3 value be connected with Electric Machine Control port is 1, and other detecting positions remain unchanged, and completes the 2nd group and detects the setting of contrast level.
For check point S303, detecting step arranges with above-mentioned setting steps basically identical, owing to there is no the change of input control and output port, can skip detecting step S102 and S104, ensure that output control terminal mouth 2 and detection contrast level arrange S103 and do not change like this.
Can merge with S306 check point for check point S304, detecting step arranges with above-mentioned basically identical, arranging output port connection terminal 8 value be connected with proximity switch is 1, other positions remain unchanged, complete and the steering logic signal S102 is set, signalization keeps time delay S103, and default value 20ms, is S305.Arrange and Electric Machine Control output port, exhaust fan detection input port 3 value that output port is connected that operate is 1, other positions remain unchanged, and complete detection and contrast level and arrange S103.Whether arrange in next group detecting step S105 selects "Yes" to carry out the setting of next group detecting step again.
Identical with above-mentioned detecting step with check point S308 method to set up for check point S307 check point, repeat no more.
Select "No" to complete whole settings of this detection scheme whether arranging in next group detecting step S105, can start to detect.
After completing detection scheme design, detection scheme uses in order to next stored in carrying in storage unit by control module 1, starts to detect, as Fig. 3 detection system overhaul flow chart simultaneously.
This pick-up unit testing process comprises the steps, from the 1st detection scheme, carries out the detection of above-mentioned check point successively.
1st check point detecting step, exported and retentive control logical block S203 according to the 1st check point by control module, time delay S204 is kept to be 20ms according to signal again, gather the detection input port 3 be connected with relay indicating light control output end mouth afterwards and be worth S205, by its S206 compared with above-mentioned setting value (being 1), as identical, proceed lower 1 check point and detect, and show this check point " PASS " by a human-computer interaction terminal 5.
2nd check point and above-mentioned detection method basically identical, input control is not had owing to there is no tested circuit board, then automatically skip output control logic signal S203 and output logic signal keeps time delay S204, gather the value S205 of the detection input port 3 be connected with Electric Machine Control port, by its S206 compared with above-mentioned setting value (being 1), identical, proceed the detection of next check point
By that analogy, the detection method of other check points is consistent with above-mentioned detection method, and to arrange according to detection scheme by control module 1 and automatically complete.
Suppose in the present embodiment that circuit-under-test plate check point S308 relay indicating light goes out dysfunction, detect and the step that reports an error as follows, when to collect detection input port 3 value be connected with relay indicating light control output end mouth be 0 (correctly should be 1), it is inconsistent that the detection arranged with check point contrasts level S104 setting value 1, then testing process enters Trouble Report flow process S210, show this check point " check point S308 " by a human-computer interaction terminal 5 and occur mistake " Error ", and the inconsistent detection output terminal slogan collected is presented in human-computer interaction terminal 5, and exit trace routine, detection system will continue normal testing process after resetting.
Although embodiments of the invention disclose as mentioned above; so and be not used to limit the present invention; anyly have the knack of relevant art; without departing from the spirit and scope of the present invention; more than exemplify is only illustrate of the present invention; do not form the restriction to protection scope of the present invention, every design changed to some extent with the same or analogous design of the present invention or specification all belongs within protection scope of the present invention.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (6)
1. an I/O port logic detection method, is characterized in that: comprise the following steps,
Step one: arrange
According to the information setting detection scheme of circuit-under-test plate, content comprise power supply voltage select, detection scheme sequence number is set, arrange each control be supplied to opportunity circuit board input logic signal, arrange each control opportunity maintenance delay time, contrast logic signal levels is set;
Step 2: detect
1) power to circuit-under-test plate according to the power supply voltage arranged in step one, and detect successively according to the detection scheme sequence number arranged in step one;
2) in single detection scheme, first to the input logic signal that the input port input of circuit-under-test plate sets, and guarantee that circuit-under-test plate receives one group of correct input logic signal;
3) keep above-mentioned input logic signal, the retention time is the maintenance delay time set in step one;
4) under the effect of above-mentioned input logic signal, circuit-under-test plate exports logic signal levels circuit-under-test plate needing the check point detected, and reads the logic signal levels that circuit-under-test plate exports;
5) the contrast logic signal levels that the logic signal levels exported by the circuit-under-test plate read in upper step and this detection sets opportunity contrasts, if unanimously, then judges the detection of this check point normally, enters next check point; If result is inconsistent, then judges that this circuit-under-test plate is abnormal, simultaneously detection of end, and will occur that the input/output port of varying level signal shows, show that this tested circuit board breaks down;
6) as the detection by previous step, then as the next input logic signal of circuit-under-test plate, next check point is detected, so circulates, until last check point in this detection scheme completes, show that this circuit-under-test plate have passed the detection of this detection scheme.
2. I/O port logic detection method as claimed in claim 1, it is characterized in that: time the detection scheme in step 2 arranges and is no less than one, after single detection scheme is by detection, automatically the detection of next detection scheme is entered, until all detection schemes are all done, finally draw the conclusion by test.
3. I/O port logic detection method as claimed in claim 1, it is characterized in that: when the contrast logic signal levels that the logic signal levels detected by any one detection opportunity in step 2 and this detection set opportunity is inconsistent, all be judged to be fault, stop immediately after there is this kind of situation detecting, stop detecting, and detection is occurred that the port of rub-out signal shows.
4. one kind is applicable to the I/O port logic detection system of I/O port logic detection method according to claim 1, comprise the system power supply for being supplied to system power, also comprise a control module (1), this control module (1) is connected with output control terminal mouth (2), detect input port (3) and detect power supply port (4), it is characterized in that: described control module (1) is connected to human-computer interaction terminal (5), this human-computer interaction terminal (5) is provided with the LCDs (6) for showing testing result and the multiple modulation buttons (7) for inputting.
5. I/O port logic detection system as claimed in claim 4, is characterized in that: described control module (1) is single-chip microcomputer.
6. I/O port logic detection system as claimed in claim 4, is characterized in that: described output control terminal mouth (2), detection input port (3) and detection power supply port (4) are optoelectronic switch.
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Application publication date: 20150325 |