CN114062841B - Testing equipment for wire break alarm - Google Patents
Testing equipment for wire break alarm Download PDFInfo
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- CN114062841B CN114062841B CN202111325261.7A CN202111325261A CN114062841B CN 114062841 B CN114062841 B CN 114062841B CN 202111325261 A CN202111325261 A CN 202111325261A CN 114062841 B CN114062841 B CN 114062841B
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
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Abstract
The invention discloses a test device of a disconnection alarm, which comprises: the device comprises an upper computer, an analog input acquisition module, a communication module, a reference voltage module and a reference current module; the signal output end of the analog quantity input acquisition module, the communication module and the reference current module are all connected with the upper computer; in the testing process, a wire break signal output interface of the wire break alarm to be tested is connected with an upper computer, and a testing algorithm is arranged in the upper computer and used for testing the wire break alarm to be tested according to a received output signal of the analog input acquisition module, a reference current output by the reference current module and a wire break signal of the wire break alarm to be tested, so that a testing result is obtained.
Description
Technical Field
The invention belongs to the technical field of automatic testing, and particularly relates to a testing device for a disconnection alarm.
Background
A large number of molding machines and packaging machines need to be applied to heating pipes, and a wire breakage alarm with large capacity and high precision judgment capability is needed to detect whether the heating pipes are broken. With the improvement of the yield of the wire-break alarm, the wire-break alarm testing equipment is also in operation, and the existing wire-break alarm testing equipment needs to spend a lot of time for setting parameters, wiring and threading, so that a part of manpower has to be spent on testing.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a test device of a wire break alarm, which aims to solve the problems of low test efficiency, low qualified rate of test products and the like of the test device of the existing wire break alarm.
The technical scheme is as follows: a disconnection alarm testing device comprising: the device comprises an upper computer, an analog input acquisition module, a communication module, a reference voltage module and a reference current module; the signal output end of the analog quantity input acquisition module, the communication module and the reference current module are all connected with the upper computer;
the signal input end of the analog quantity input acquisition module is connected with the signal output interface of the to-be-tested disconnection alarm, and is used for acquiring an internal voltage signal of the to-be-tested disconnection alarm and acquiring a current value flowing through a test line of the reference current module; the communication module is connected with a communication interface of the to-be-tested disconnection alarm and is used for realizing information transmission between the upper computer and the to-be-tested disconnection alarm;
the reference voltage module is connected with a power interface of the to-be-tested disconnection alarm and used for providing reference voltage for the to-be-tested disconnection alarm;
the reference current module sequentially penetrates through a current detection annular hole in the to-be-tested disconnection alarm in the testing process and is used for providing reference current and testing current for the to-be-tested disconnection alarm;
in the testing process, a wire break signal output interface of the wire break alarm to be tested is connected with an upper computer, and a testing algorithm is arranged in the upper computer and used for testing the wire break alarm to be tested according to a received output signal of the analog input acquisition module, a reference current output by the reference current module and a wire break signal of the wire break alarm to be tested, so that a testing result is obtained.
Further, the communication module is a 485 communication circuit.
Further, the test algorithm comprises the following steps:
step 1: acquiring direct-current voltage detection information obtained by self-diagnosis in the to-be-tested disconnection alarm, if the direct-current voltage detection information is normal, executing the step 2, otherwise, judging that the to-be-tested disconnection alarm is in an abnormal state, and finishing the detection;
step 2: judging whether the disconnection information of the disconnection alarm to be tested is received, if so, executing the step 3, otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection;
and step 3: after the internal detection voltage of the to-be-tested disconnection alarm is determined to be calibrated and the test wire of the reference current source module sequentially penetrates through the internal current detection annular hole of the to-be-tested disconnection alarm, controlling the reference current source module to output a calibration current; executing the step 4;
and 4, step 4: judging whether a disconnection releasing signal is received or not, and if so, executing the step 5; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection;
and 5: after the detection current in the to-be-tested disconnection alarm is calibrated, controlling the reference current source module to input the test current to the to-be-tested disconnection alarm, and executing the step 6;
step 6: acquiring current flowing through a test line of a reference current source module as detection current, judging whether the detection current is consistent with the test current, if so, judging that the disconnection alarm to be tested is in a normal state, and finishing the detection; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection.
Further, the test current is the calibration current output by the reference current source multiplied by the number of times that the test wire of the reference current source module passes through the internal current detection ring hole of the wire breakage alarm to be tested.
Further, in step 1, the dc voltage detection information includes whether the voltage required by the internal circuit chip of the to-be-tested disconnection alarm is normal and whether the CPU operating voltage in the to-be-tested disconnection alarm is normal. Further, in step 3, calibrating the internal detection voltage of the disconnection alarm to be tested, comprising the following steps:
supplying power to a disconnection alarm to be tested through a reference voltage module;
and the voltage detected by the to-be-tested disconnection alarm is consistent with the output voltage of the reference voltage module by adjusting a potentiometer on the to-be-tested disconnection alarm, so that the calibration is completed.
Has the beneficial effects that: the testing equipment provided by the invention does not need to spend a large amount of time for setting parameters, wiring and threading, so that the testing efficiency and the qualified rate of the tested products are greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a broken wire alarm testing device;
FIG. 2 is a flow chart of a method of testing a disconnection alarm;
FIG. 3 is a circuit diagram of SP485 EEN-L/TR.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the test equipment for the disconnection alarm of the invention comprises an upper computer, an analog input acquisition module, a 485 communication circuit, an alternating current 220v reference voltage source module and a reference current source module; in some embodiments, Mitsubishi Q64AD may be used as the analog input acquisition module, the SP485EEN-L/TR circuit may be used as the 485 communication circuit, the Watson bp6010 may be used as the AC 220v reference voltage source module, and the reference current source module may be used as the YOKOGAWA 2558A AC standard/current source.
When the device is used, a disconnection signal output interface of the disconnection alarm to be tested is connected with an upper computer, the analog quantity input acquisition module, the 485 communication circuit and the reference current source module are all connected with the upper computer, wherein the 485 communication circuit is connected with the communication interface of the disconnection alarm to be tested and is used for setting parameters such as an action current value, a voltage compensation value and the like for the disconnection alarm to be tested according to an instruction of the upper computer and receiving internal detection information from the disconnection alarm to be tested; the alternating current 220v reference voltage source module is connected with a power interface of the to-be-tested disconnection alarm and is used for providing reference voltage for the to-be-tested disconnection alarm; in the testing process, the testing line of the reference current source module sequentially passes through 3 internal current detection annular holes (CT1, CT2 and CT3) of the disconnection alarm to be tested and is used for providing reference current and testing current for the disconnection alarm; the analog quantity input acquisition module is connected with a signal output interface of the disconnection alarm to be tested and is used for acquiring a voltage signal ((DC +/-12V, DC5V)) output by the disconnection alarm and a current value flowing through a test line of the reference current source module, which is acquired by the inside of the disconnection alarm to be tested. The DC +/-12V is the voltage required by a circuit chip in the disconnection alarm to be tested, the DC5V is the working voltage of a CPU in the disconnection alarm to be tested, and if the two voltages are not in pair, the disconnection alarm cannot establish communication connection and work with an upper computer.
The built-in test algorithm of host computer tests the alarm that breaks wire according to the signal that receives, and the test content includes but not limited to: setting the operation current value and the voltage compensation value, judging whether the voltage detection DC + -12V, DC5V is normal or not, and judging whether a disconnection signal is received or not.
The detection of the upper computer will now be further explained with reference to fig. 2, which includes the following steps:
step 1: the upper computer sets parameters such as an action current value, a voltage compensation value and the like for the disconnection alarm to be tested through the 485 communication circuit; the upper computer can not receive the disconnection information of the disconnection alarm and the action current value set value, when the test wire of the reference current source module does not penetrate through 3 internal current detection ring holes (CT1, CT2 and CT3) of the disconnection alarm, the disconnection alarm detects no current, the disconnection alarm compares the detected current with the action current value set value, and if the detection current of the disconnection alarm is smaller than the set action current value, the disconnection alarm outputs the disconnection information. The setting of the voltage compensation value is consistent with the requirement that the voltage is calibrated to 220V +/-1V through the internal detection in the step 4, otherwise, the calibration current in the step 6 is inaccurate, and the test current and the detection current in the step 7 are inconsistent.
Step 2: after the disconnection alarm to be tested is powered on, whether the direct current voltage (DC +/-12V, DC5V) is normal or not is judged in the disconnection alarm to be tested, the judgment result is sent to an upper computer through a 485 communication circuit, the upper computer executes corresponding steps according to the received judgment result, and if the judgment result is normal, the step 3 is executed; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection; DC +/-12V is the voltage required by the internal circuit chip of the disconnection alarm to be tested, DC5V is the working voltage of the CPU in the disconnection alarm to be tested, and if the two voltages are not in pair, the disconnection alarm cannot establish communication connection and work with an upper computer.
And step 3: the upper computer judges whether the disconnection information of the disconnection alarm to be tested is received, if so, the step 4 is executed, otherwise, the disconnection alarm to be tested is judged to be in an abnormal state, and the detection is finished;
and 4, step 4: the reference voltage module can provide 220V +/-1V voltage to supply power for the short-line alarm, the voltage detected by the disconnection alarm is about 230V generally, a potentiometer needs to be manually adjusted on the disconnection alarm at the moment, the voltage detected by the disconnection alarm is consistent with the output voltage of the reference voltage module, namely the voltage is calibrated to be 220V +/-1V, otherwise the calibration current of the step 6 is inaccurate, and the test current and the detection current of the step 7 are inconsistent. At the moment, the test wire of the reference current source module sequentially passes through 3 internal current detection annular holes (CT1, CT2 and CT3) of the disconnection alarm to be tested, the upper computer controls the reference current source module to output calibration current, and the step 5 is executed;
and 5: the upper computer judges whether a disconnection releasing signal is received, and if the disconnection releasing signal is received, the step 6 is executed; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection;
step 6: the upper computer controls the reference current source module to input a test current to the to-be-tested disconnection alarm, the test current is the output calibration current of the reference current source and is multiplied by the number of times that the test wire of the reference current source module passes through an internal current detection annular hole of the to-be-tested disconnection alarm, under the general condition, the calibration current is 8A-10A, and the step 7 is executed; in this step, the number of times the internal current sense loop of the disconnection alarm to be tested is crossed refers to: assuming that the disconnection alarm to be tested has 3 internal current detection ring holes (CT1, CT2, CT3), when the test line of the reference current source module sequentially passes through the 3 internal current detection ring holes once, the same test line performs the action of sequentially passing through the 3 internal current detection ring holes once again, which is recorded as twice.
And 7: the method comprises the steps that the current value of a test wire flowing through a reference current source module is automatically obtained from the interior of a to-be-tested broken wire alarm, an upper computer judges whether the current value is consistent with the test current output by the reference current source module, if so, the to-be-tested broken wire alarm is judged to be in a normal state, and the detection is finished; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection.
Claims (2)
1. The utility model provides a disconnection alarm test equipment which characterized in that: the method comprises the following steps: the device comprises an upper computer, an analog input acquisition module, a communication module, a reference voltage module and a reference current module; the signal output end of the analog quantity input acquisition module, the communication module and the reference current module are all connected with the upper computer;
the signal input end of the analog quantity input acquisition module is connected with the signal output interface of the to-be-tested disconnection alarm, and the analog quantity input acquisition module is used for acquiring an internal voltage signal of the to-be-tested disconnection alarm and acquiring a current value flowing through a test wire of the reference current module; the communication module is connected with a communication interface of the to-be-tested disconnection alarm and is used for realizing information transmission between the upper computer and the to-be-tested disconnection alarm;
the reference voltage module is connected with a power interface of the to-be-tested disconnection alarm and used for providing reference voltage for the to-be-tested disconnection alarm;
the reference current module sequentially penetrates through a current detection annular hole in the to-be-tested disconnection alarm in the testing process and is used for providing reference current and testing current for the to-be-tested disconnection alarm;
in the testing process, a disconnection signal output interface of the disconnection alarm to be tested is connected with an upper computer, and a testing algorithm is arranged in the upper computer and is used for testing the disconnection alarm to be tested according to a received output signal of an analog input acquisition module, a reference current output by a reference current module and a disconnection signal of the disconnection alarm to be tested, so as to obtain a testing result;
the test algorithm comprises the following steps:
step 1: acquiring direct-current voltage detection information obtained by self-diagnosis in the to-be-tested disconnection alarm, if the direct-current voltage detection information is normal, executing the step 2, otherwise, judging that the to-be-tested disconnection alarm is in an abnormal state, and finishing the detection; the direct-current voltage detection information comprises the steps of detecting whether the voltage required by an internal circuit chip of the disconnection alarm to be tested is normal or not and detecting whether the working voltage of a Central Processing Unit (CPU) in the disconnection alarm to be tested is normal or not;
and 2, step: judging whether the disconnection information of the disconnection alarm to be tested is received, if so, executing the step 3, otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection;
and step 3: after the internal detection voltage of the to-be-tested disconnection alarm is determined to be calibrated and the test line of the reference current source module sequentially passes through the internal current detection annular hole of the to-be-tested disconnection alarm, controlling the reference current source module to output calibration current; executing the step 4;
and 4, step 4: judging whether a disconnection releasing signal is received or not, and if so, executing the step 5; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection;
and 5: after the internal detection current of the to-be-tested disconnection alarm is calibrated, controlling a reference current source module to input a test current to the to-be-tested disconnection alarm, wherein the test current = the calibration current output by the reference current source is multiplied by the number of times that a test wire of the reference current source module penetrates through an internal current detection annular hole of the to-be-tested disconnection alarm, and executing the step 6;
step 6: acquiring current flowing through a test line of a reference current source module as detection current, judging whether the detection current is consistent with the test current, if so, judging that the disconnection alarm to be tested is in a normal state, and finishing the detection; otherwise, judging that the disconnection alarm to be tested is in an abnormal state, and finishing the detection;
in step 3, the internal detection voltage of the to-be-tested disconnection alarm is calibrated, and the method comprises the following steps:
a user enables the voltage detected by the disconnection alarm to be consistent with the output voltage of the reference voltage module through a potentiometer on the disconnection alarm, and the internal detection voltage calibration of the disconnection alarm to be tested is completed;
in step 3, the test wire of the reference current source module sequentially passes through the internal current detection annular hole of the alarm for testing disconnection, and the method comprises the following steps:
after the internal detection voltage of the to-be-tested disconnection alarm is calibrated, a user sequentially penetrates the test wire of the reference current source module through the internal current detection annular hole of the to-be-tested disconnection alarm.
2. The disconnection alarm test equipment of claim 1, wherein: the communication module is a 485 communication circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111325261.7A CN114062841B (en) | 2021-11-10 | 2021-11-10 | Testing equipment for wire break alarm |
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| CN202111325261.7A CN114062841B (en) | 2021-11-10 | 2021-11-10 | Testing equipment for wire break alarm |
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| CN114062841B true CN114062841B (en) | 2022-08-12 |
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