CN114384396A - Information preprocessing module circuit test system - Google Patents
Information preprocessing module circuit test system Download PDFInfo
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- CN114384396A CN114384396A CN202111542670.2A CN202111542670A CN114384396A CN 114384396 A CN114384396 A CN 114384396A CN 202111542670 A CN202111542670 A CN 202111542670A CN 114384396 A CN114384396 A CN 114384396A
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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
- G01R31/2851—Testing of integrated circuits [IC]
Abstract
The invention discloses a circuit testing system of an information preprocessing module, which comprises a testing circuit board tool, wherein the information preprocessing module circuit to be tested is fixedly inserted on the testing circuit board tool; the test source meter is electrically connected to the test circuit board tool and used for performing electrical parameter test including source input and signal data acquisition, and the test source meter is connected to the test host and used for realizing automatic test and uploading to the test host; the test circuit board tool comprises a signal input control circuit, an alternating current parameter measurement control circuit and a direct current parameter measurement control circuit.
Description
Technical Field
The present invention relates to the field of integrated circuit testing, and more particularly, to hybrid integrated circuit testing, and more particularly, to a circuit testing system for an information preprocessing module.
Background
At present, for the test of some special hybrid integrated circuits, there is no universal test method, so the test of the existing hybrid integrated circuits adopts manual test, and two test operators are needed to cooperate to perform the test. The traditional test method is as follows: one operator manually moves the switch to adjust the test hardware to the test circuit with corresponding parameters, and manually reads the data of the instrument and enables the other test operator to record the test data in a dictation mode; the test mode has low working efficiency, and is easy to cause the phenomenon of error recording or omission recording of the reading and recording of test data, or cause the wrong lapping of the test circuit because of the misoperation of a switch of a hardware test circuit, thereby causing the burning of devices.
Because the hybrid integrated circuit is expensive and expensive to produce, if errors occur in reading, recording data and hardware operation, huge losses are brought to enterprises, the workload of workers is particularly large, and the accuracy and consistency of testing cannot be guaranteed.
Disclosure of Invention
The invention aims to provide the circuit test system of the information preprocessing module, which has high working efficiency and can ensure the accuracy and consistency of the test.
In order to achieve the purpose, the invention adopts the following technical scheme:
an information pre-processing module circuit test system, comprising:
the test circuit board tool is electrically connected to the information preprocessing module circuit to be tested and the test source table and is used for providing an electric connection interface and a test electric principle structure of corresponding parameters for the information preprocessing module circuit to be tested, and the circuit structure of the corresponding parameters is built by switching a relay on the test circuit board tool so as to realize corresponding electric parameter test;
the test source meter is electrically connected to the test circuit board tool and used for carrying out electrical parameter test including source input and signal data acquisition; the test source table is connected to the test host and used for realizing automatic test and uploading test data to the test host;
the test circuit board tool comprises:
the input end of the signal input control circuit is electrically connected with the program control signal source of the test source meter, the output ends of the signal input control circuit are respectively electrically connected with two groups of signal input ends of the information preprocessing module circuit to be tested, and the signal input control circuit is used for controlling the corresponding signals output by the program control signal source to be connected into the two groups of signal input ends of the information preprocessing module circuit to be tested;
the input end of the alternating current parameter measurement control circuit is respectively and electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested, and the output end of the alternating current parameter measurement control circuit is respectively and electrically connected with the program control oscilloscope of the test source meter through a measurement end interface arranged on the test circuit board tool and is used for testing alternating current parameters of the information preprocessing module circuit to be tested;
and the input end of the direct current parameter measurement control circuit is respectively and electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested, and the output end of the direct current parameter measurement control circuit is electrically connected with the program control data acquisition unit of the test source meter through a measurement signal output port arranged on the test circuit board tool or sequentially through a differential signal amplification circuit and a measurement signal output port arranged on the test circuit board tool and is used for testing the direct current parameters of the information preprocessing module circuit to be tested.
More preferably, the signal input control circuit comprises a voltage division circuit and two relays S4 and S5, two voltage output ends of the voltage division circuit are respectively and electrically connected with one ends of normally closed contacts of the relays S4 and S5, and the other ends of the normally closed contacts of the relays S4 and S5 are grounded; two ends of a common contact of the relays S4 and S5 are respectively connected with two groups of signal input ends of the information preprocessing module circuit to be detected; two ends of normally open contacts of the relays S4 and S5 are respectively and electrically connected with a signal output end of the noise signal source; and the signal switching module is used for switching the controllable signal output by the program control signal source or the noise signal output by the noise signal source into the information preprocessing module circuit to be detected through the control of the relay.
Preferably, the alternating current parameter measurement control circuit comprises two relays S1 and S2, two ends of a pair of normally closed contacts of the relay S1 are electrically connected with a first signal output end and a 10V reference pin of the information preprocessing module circuit to be tested respectively, two ends of a pair of normally open contacts of the relay S1 are electrically connected with a 5V reference pin and a second signal output end of the information preprocessing module circuit to be tested respectively, and two ends of a pair of common contacts of the relay S1 are electrically connected with two measurement terminal interfaces J1 and J2 arranged on the test circuit board tool respectively;
a normally closed contact of the relay S2 is electrically connected with a-10V reference pin of the information preprocessing module circuit to be tested, a common contact of the relay S2 is electrically connected with a measuring end interface J3 arranged on a test circuit board tool, and a normally open contact of the relay S2 is electrically connected with a third signal output end of the information preprocessing module circuit to be tested.
Preferably, the direct current parameter measurement control circuit comprises relays S3, S6 and S7, two ends of a pair of common contacts of the relays S3, S6 and S7 are electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested in a one-to-one correspondence manner, two ends of a pair of normally closed contacts of the relays S3, S6 and S7 are electrically connected with measurement signal output ports J4, J7 and J13 arranged on the test circuit board tool in a one-to-one correspondence manner, and two ends of a pair of normally open contacts of the relays S3, S6 and S7 are electrically connected with the differential signal amplification circuit respectively.
Preferably, the differential signal amplifying circuit comprises three operational amplifiers U1, U2 and U3, two input ends of the three operational amplifiers U1, U2 and U3 are respectively and correspondingly electrically connected with two ends of a pair of normally open contacts of the relays S3, S6 and S7; the output end of the operational amplifier U1 is electrically connected with the measurement signal output port J5, and the output ends of the operational amplifier U2 and U3 are respectively electrically connected with the measurement signal output port J8; and the three groups of output signals are used for respectively carrying out differential amplification on the three groups of output signals of the information preprocessing module circuit to be detected and then transmitting the signals to the program control oscilloscope.
Preferably, the test source meter comprises a program-controlled power supply, a program-controlled signal source, a program-controlled matrix switch module, a program-controlled oscilloscope and a program-controlled data acquisition unit; the programmable power supply is electrically connected with a power interface arranged on the test circuit board tool and used for supplying power to the test circuit board tool; the output end of the program control signal source is electrically connected with the input end of a voltage division circuit in the signal input control circuit and is used for outputting a controllable signal to the signal input control circuit; the normally open contacts of the control channels of the program control matrix switch module are respectively and electrically connected with each relay on the test circuit board tool and used for controlling the action of each relay so as to build a test circuit structure with corresponding parameters; the input end of the program control oscilloscope is electrically connected with a measuring end interface arranged on a test circuit board tool and used for testing the alternating current parameters of the information preprocessing module circuit to be tested; the input end of the program control data acquisition unit is electrically connected with a measurement signal output port arranged on the test circuit board tool and used for testing the direct current parameters of the information preprocessing module circuit to be tested.
Preferably, the number of the program-controlled oscilloscopes is four, one of the program-controlled oscilloscopes is connected with the measuring end interface, and the other three program-controlled oscilloscopes are respectively and electrically connected with a measuring signal output port arranged on the test circuit board tool and used for monitoring the direct current output waveform of the information preprocessing module circuit to be detected and detecting whether a self-excitation phenomenon exists.
Preferably, two ends of a pair of normally closed contacts of the relays S3, S6, and S7 are grounded through a load resistor, respectively, and the relays are used for testing the dc voltage output by the information preprocessing module circuit to be tested under a certain load, so as to ensure that the output dc voltage has a certain loading capacity.
Preferably, the operational amplifiers U1, U2 and U3 are OP07, respectively, a resistor is connected between an output end and an inverting input end of each operational amplifier, two power input ends of each operational amplifier are grounded through a capacitor, and two input ends of each operational amplifier are electrically connected with the corresponding relay S3, S6 or S7 through a current-limiting resistor.
The invention has the beneficial effects that:
1. because the test circuit board tool comprises the signal input control circuit, the alternating current parameter measurement control circuit and the direct current parameter measurement control circuit which are arranged on the PCB, the alternating current controllable signal output by the program control signal source or the noise signal output by the noise signal source can be connected to the signal input end of the information preprocessing module to be tested through the relay control in the signal input control circuit, and therefore the information preprocessing module to be tested can be tested under two different input signals.
2. Through the control of the relay in the alternating current parameter measurement control circuit, three groups of signal output ends of the information preprocessing module circuit to be tested can be electrically connected with the program control oscilloscope of the test source meter through the measurement end interface respectively, so that the alternating current parameters output by the information preprocessing module circuit to be tested can be tested.
3. Through the control of a relay in the direct current parameter measurement control circuit, three groups of signal output ends of the information preprocessing module circuit to be tested can be electrically connected with the program control data acquisition unit of the test source table through the measurement signal output end respectively, so that direct current parameters output by the information preprocessing module circuit to be tested can be tested; three groups of output signals of the information preprocessing module circuit to be tested can be respectively subjected to differential amplification through the differential signal amplification circuit arranged on the test circuit board tool and then transmitted to the program control data acquisition unit, so that parameters after differential amplification are measured.
4. The normally open contacts of the program control matrix switch module in the test source table are respectively and electrically connected with each relay in each control circuit on the test circuit board tool, so that the action of each relay can be controlled through the program in the test host, and a test circuit structure with corresponding parameters is built; the working efficiency is high, the accuracy and the consistency of the test can be ensured, the labor intensity of workers is greatly reduced, and unnecessary loss of enterprises caused by manual test operation errors is effectively avoided.
Drawings
Fig. 1 is a block diagram of the structure of the present invention.
Fig. 2 is a circuit block diagram of the test circuit board fixture of the present invention.
Fig. 3 is a schematic circuit diagram of the circuit board testing tool of the present invention.
FIG. 4 is a block diagram of the connection between the test source table and the test circuit board fixture according to the present invention.
Fig. 5 is a schematic diagram of the test of electrical parameters such as power supply output reference, ripple, output voltage, ac signal, potentiometer voltage, etc. of the information preprocessing module circuit according to the present invention.
In the figure: the device comprises a measuring end interface 1, an alternating current parameter measuring control circuit 2, a direct current parameter measuring control circuit 3, a differential signal amplifying circuit 4, a signal input control circuit 5, a power interface 6, a program control signal source 7, a noise signal source 8, a program control power supply 9, a program control matrix switch module 10, a program control data acquisition unit 11, a program control oscilloscope 12 and a test host 13.
Detailed Description
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
As shown in fig. 1-4, the information preprocessing module circuit testing system according to the present invention includes a testing circuit board fixture, a testing source table, and a testing host 13, wherein an information preprocessing module circuit to be tested is fixedly inserted into the testing circuit board fixture, the testing circuit board fixture is electrically connected to the information preprocessing module circuit to be tested and the testing source table, and is configured to provide an electrical connection interface and a testing electrical principle structure of corresponding parameters for the information preprocessing module circuit to be tested, and the testing electrical parameter testing is implemented by switching a relay on the testing circuit board fixture to build a circuit structure of corresponding parameters.
The test source meter is electrically connected to the test circuit board tool and used for carrying out electrical parameter test including source input and signal data acquisition; the test source table is connected to the test host 13 through a GPIB communication interface and a communication cable, and is used to implement automatic testing and upload test data to the test host 13.
The test circuit board tool comprises a PCB, and a power interface 6, a signal input control circuit 5, an alternating current parameter measurement control circuit 2, a direct current parameter measurement control circuit 3, a measurement end interface 1 and a measurement signal output port are arranged on the PCB.
The input end of the signal input control circuit 5 is electrically connected with the program control signal source of the test source meter, the output end of the signal input control circuit is respectively and electrically connected with two groups of signal input ends of the information preprocessing module circuit to be tested U4, and the signal input control circuit is used for controlling controllable direct current or alternating current signals output by the program control signal source to be accessed into two groups of signal input ends of the information preprocessing module to be tested through a relay in the signal input control circuit 5.
The signal input control circuit 5 comprises a voltage division circuit and two relays S4 and S5, the voltage division circuit comprises resistors R4, R5, R6, R17 and R7, the resistors R4, R5, R6 and R17 are sequentially connected in series between a signal input end VIN and a ground end, and the resistor R7 is connected in parallel at two ends of the resistor R4 and leads out a voltage output end VIN-5 for electrically connecting with a 19 pin of an information preprocessing module circuit U4; the voltage output terminals VIN-1 and VIN-2 are respectively led out between the resistors R6 and R17 and between the resistors R5 and R6. The signal input end VIN of the voltage division circuit is electrically connected with a 17-pin of the information preprocessing module circuit U4 to be detected, two voltage output ends VIN-1 and VIN-2 are respectively electrically connected with one ends of normally closed contacts of the relays S4 and S5, and the other ends of the normally closed contacts of the relays S4 and S5 are grounded; the coils of the relays S4 and S5 are connected with a 6V power supply through a power interface 6, and two ends of a common contact of the relays S4 and S5 are respectively connected with two groups of signal input ends GYH, GYL, GXH and GXL of the information preprocessing module circuit U4 to be tested; two ends of normally open contacts of the relays S4 and S5 are respectively and electrically connected with a signal output end of the noise signal source; and the signal preprocessing module circuit is used for accessing a corresponding signal output by the program control signal source or a noise signal output by the noise signal source into the information preprocessing module circuit U4 to be detected through the control of the relay.
The input end of the alternating current parameter measurement control circuit 2 is respectively and electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested U4, and the output end of the alternating current parameter measurement control circuit is respectively and electrically connected with the program control oscilloscope of the test source meter through a measurement end interface 1 arranged on the test circuit board tool, and is used for testing alternating current parameters of the information preprocessing module circuit to be tested U4.
The alternating current parameter measurement control circuit 2 comprises two relays S1 and S2, wherein two ends of a pair of normally closed contacts of the relay S1 are respectively and electrically connected with a first signal output end, namely a 7 pin and a 10V reference pin, of the information preprocessing module circuit U4 to be tested, two ends of a pair of normally open contacts of the relay S1 are respectively and electrically connected with a 5V reference pin and a second signal output end, namely a 5 pin, of the information preprocessing module circuit U4 to be tested, and two ends of a pair of common contacts of the relay S1 are respectively and electrically connected with two measurement end interfaces J1 and J2 arranged on a test circuit board tool;
a normally closed contact of the relay S2 is electrically connected with a-10V reference pin of the information preprocessing module circuit U4 to be tested, a common contact of the relay S2 is electrically connected with a measuring end interface J3 arranged on a test circuit board tool, and a normally open contact of the relay S2 is electrically connected with a third signal output end, namely a 3 pin, of the information preprocessing module circuit U4 to be tested.
The input end of the direct current parameter measurement control circuit 3 is electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested U4 respectively, the output end of the direct current parameter measurement control circuit is electrically connected with the program control data collector of the test source meter through a measurement signal output port arranged on the test circuit board tool or sequentially through a differential signal amplification circuit 4 and a measurement signal output port arranged on the test circuit board tool, and the direct current parameter measurement control circuit is used for directly measuring three groups of output signals of the information preprocessing module circuit to be tested U4 or differentially amplifying three groups of output signals of the information preprocessing module circuit to be tested U4 and then transmitting the amplified signals to the program control data collector, so as to test direct current parameters of the information preprocessing module circuit to be tested U4.
The direct current parameter measurement control circuit 3 comprises relays S3, S6 and S7, two ends of a pair of common contacts of the relay S3 are respectively and correspondingly electrically connected with a first group of signal output ends, namely pins 7 and 8, of the information preprocessing module circuit U4 to be tested, two ends of a pair of common contacts of the relay S6 are respectively and correspondingly electrically connected with pins 5 and 6 of a second group of signal output ends of the information preprocessing module circuit U4 to be tested, and two ends of a pair of common contacts of the relay S7 are respectively and correspondingly and electrically connected with pins 3 and 4 of a third group of signal output ends of the information preprocessing module circuit U4 to be tested;
two ends of a pair of normally closed contacts of the relays S3, S6 and S7 are respectively and correspondingly electrically connected with measurement signal output ports J4, J7 and J13 arranged on a test circuit board tool, and two ends of a pair of normally closed contacts of the relays S3, S6 and S7 are respectively grounded through a load resistor R8, R9, R19, R20, R32 and R33, so that the relays are used for testing the direct current voltage output by the information preprocessing module circuit U4 to be tested under a certain load, and the output direct current voltage is ensured to have certain load carrying capacity. Two ends of a pair of normally open contacts of the relays S3, S6 and S7 are respectively and electrically connected with the operational amplifier in the differential signal amplifying circuit 4.
The differential signal amplifying circuit 4 comprises three operational amplifiers U1, U2 and U3, wherein the operational amplifiers U1, U2 and U3 respectively adopt OP07, resistors R2, R15 and R24 are respectively connected between the output end and the inverting input end of each operational amplifier, two power input ends of the operational amplifiers are respectively grounded through a filter capacitor, two input ends of the operational amplifier U1 are respectively and correspondingly electrically connected with two ends of a pair of normally open contacts of the relay S3 through current limiting resistors R10 and R1, two input ends of the operational amplifier U2 are respectively and correspondingly and electrically connected with two ends of a pair of normally open contacts of the relay S6 through current limiting resistors R11 and R12, and two input ends of the operational amplifier U3 are respectively and correspondingly and electrically connected with two ends of a pair of normally open contacts of the relay S7 through current limiting resistors R21 and R22; the non-inverting input ends of the three operational amplifiers U1, U2 and U3 are grounded through resistors R13, R14 and R23 respectively;
the output end of the operational amplifier U1 is electrically connected with the measurement signal output port J5 through a resistor R3 and is grounded through a capacitor C1; the output ends of the operational amplifiers U2 and U3 are respectively and electrically connected with the measuring signal output port J8 through resistors R16 and R25, and are respectively grounded through capacitors C2 and C3; and the three groups of output signals of the information preprocessing module circuit U4 to be detected are respectively subjected to differential amplification and then transmitted to the program control oscilloscope.
The test circuit board tool is also provided with a measurement signal output port J18 and a measurement signal output port J19, two pins of the measurement signal output port J18 are respectively and electrically connected with pins 12 and 13 of the test information preprocessing module circuit U4 and are respectively grounded through resistors R28 and R29, two pins of the measurement signal output port J19 are respectively and electrically connected with pins 14 and 15 of the test information preprocessing module circuit U4 and are respectively grounded through resistors R30 and R31, and the measurement signal output port J3983 is used for measuring the output potentiometer voltage.
The test source meter comprises a program-controlled power supply 9, a noise signal source 8, a program-controlled signal source 7, a program-controlled matrix switch module 10, a program-controlled oscilloscope 12 and a program-controlled data acquisition unit 11; the program-controlled power supply 9 is electrically connected with the plurality of power interfaces 6 arranged on the PCB respectively through leads and is used for supplying power to the test circuit board tool; the output end of the program control signal source 7 is electrically connected with the signal input end VIN of the voltage division circuit in the signal input control circuit 5 and is used for outputting a controllable signal to the signal input control circuit 5; a plurality of control channel normally open contacts of the program control matrix switch module 10 are respectively and electrically connected with each relay on the test circuit board tool and are used for controlling the action of each relay so as to build a test circuit structure with corresponding parameters;
the input end of one of the program-controlled oscilloscopes 12 is electrically connected with measuring end interfaces J1, J2 and J3 arranged on a test circuit board tool and used for testing alternating current parameters of the information preprocessing module circuit U4 to be tested; the other three program-controlled oscilloscopes are respectively and electrically connected with measuring signal output ports J4, J5, J7, J8 and J13 arranged on the test circuit board tool and are used for monitoring the direct current output waveform of the information preprocessing module circuit U4 to be tested and detecting whether a self-excitation phenomenon exists or not;
the input end of the program-controlled data acquisition unit 11 is electrically connected with measurement signal output ports J4, J5, J7, J8, J13, J18 and J19 arranged on a test circuit board tool, and is used for testing direct current parameters of an information preprocessing module circuit U4 to be tested.
During testing, each interface and port of the test circuit board tool are electrically and reliably connected with the test source meter part, after each instrument of the test source meter is electrified and preheated for 30 minutes, a test program in the test host 13 is started, and after information of relevant devices is input, the test is started, wherein the test process is as follows:
firstly, measuring power output reference and ripple waves:
the test instrument used for measuring the output reference and the ripple parameters comprises a program-controlled power supply, a program-controlled data acquisition device and a program-controlled oscilloscope, and the information preprocessing module circuit U4 to be tested is inserted on a test circuit board tool through a pin and is electrically connected with each instrument of a test source meter through the test circuit board tool;
the output of the first channel of the voltage of the program-controlled power supply is controlled to be +12V +/-20 mV, the output of the second channel is controlled to be-12V +/-20 mV, the output of the third channel is controlled to be +6V +/-15 mV by the bottom-layer programming code in the test host 13, and power supply is provided for the information preprocessing module circuit U4 through the power interface 6. The circuit connected as shown in fig. 5 performs power output reference test on the voltage signal between the corresponding pins of the information preprocessing module circuit U4 to be tested through the program control data acquisition unit 11, and uploads the test result to the test host through the communication interface for data recording.
And keeping the power supply, controlling the programmable matrix switch module 10 to switch the relays S1 and S2 through the test host at the moment, electrically connecting the corresponding ports of the programmable oscilloscope to the corresponding signal output ends 7, 5 and 3 of the information preprocessing module circuit U4, measuring ripple signals between the corresponding pins of the information preprocessing module circuit U4 by using the alternating current gear through the programmable oscilloscope, and uploading the test result to the test host through the communication interface for data recording.
Measuring output voltage:
the testing instrument used for measuring the output voltage parameters comprises a program control power supply, a program control data acquisition unit and a program control signal source, required direct current voltages are respectively output through the program control signal source, voltage division circuits in a signal input control circuit and relays S4 and S5 are respectively added between pins 28 and 27, 26 and 25, and pins 24 and 23 of an information preprocessing module circuit U4, then the program control data acquisition unit is used for measuring the voltages between pins 3, 4, pins 5 and 6, and pins 7 and 8 of an information preprocessing module circuit U4 to be tested through measuring signal output ports J7, J13 and J4 respectively, namely output voltages are obtained, and the test results are uploaded to a testing host through a communication interface for data recording.
Three, alternating current signal measurement
The testing instrument for measuring the alternating current signal parameters comprises a program control signal source, a program control power supply, a program control oscilloscope and a program control data acquisition unit. Sine wave alternating current signals with the peak value of 1V and the frequency of 300Hz are output by a program control signal source, are added between 28 pins and 27 pins and between 26 pins and 25 pins of an information preprocessing module circuit U4 through a voltage division circuit and a relay S4 in a signal input control circuit, and then peak-to-peak voltages between pins 3 and 4 and between pins 5 and 6 of the information preprocessing module circuit U4 to be detected are measured and recorded by a program control data acquisition device through measuring signal output ports J7 and J13 respectively. The sine wave signal with peak-to-peak value of 2V and frequency of 300Hz applied by the program control signal source is changed by the test host, and is added between pins 24 and 23 of the information preprocessing module circuit U4 through a voltage division circuit and a relay S5 in the signal input control circuit, and then the peak-to-peak value voltage between pins 7 and 8 of the information preprocessing module circuit U4 to be tested is measured and recorded by the program control data acquisition device through a measurement signal output port J4. The peak voltage recorded in the two times is the value of the alternating current signal parameter, and the test result is uploaded to the test host computer through the communication interface for data recording.
Fourthly, measuring the voltage of a potentiometer:
the measuring instrument for measuring the potentiometer voltage comprises a program-controlled power supply, a program-controlled data acquisition unit and a program-controlled signal source. The method comprises the steps of respectively connecting +/-12V and ground to pins 20, 21 and 22 of an information preprocessing module circuit U4 to be tested through a power interface 6 by using a programmable power supply, adding 5V direct-current voltage between pins 19 and 18 of an information preprocessing module circuit U4 through a voltage output end VIN-5 of a voltage division circuit by using a programmable signal source, and measuring and recording the voltage between the pins 12 and 13 of the information preprocessing module circuit U4 through a measurement signal output port J18 by using a programmable data acquisition device.
10V direct current voltage is added between pins 17 and 18 of the information preprocessing module circuit U4 through the program control signal source, and the voltage between pins 14 and 15 of the information preprocessing module circuit U4 is measured and recorded through the measuring signal output port J19 by using the program control data acquisition device.
Fifthly, measuring noise voltage:
the test instruments used for measuring the noise voltage comprise a program-controlled power supply, a program-controlled oscilloscope and a noise signal source. The testing host controls the programmable matrix switch module to switch the relays S4, S5, S3, S6 and S7, so that noise signals output by a noise signal source enter pins 26 and 25, pins 24 and 23 of an information preprocessing module circuit U4 to be tested through the relays S4 and S5, three groups of output signals of the information preprocessing module circuit U4 to be tested enter the operational amplifiers U1, U2 and U3 through the relays S3, S6 and S7 respectively to be subjected to differential amplification, and then the three groups of output signals are sent to the programmable oscilloscope.
Three groups of output signals of a ground test information preprocessing module circuit U4 are processed by a program control oscilloscope, and the gear of the program control oscilloscope is adjusted to 50mV and 400 ms; and after the power supply is switched on, keeping the static state, testing the peak value of the noise, removing the spikes in the noise graph, and recording the peak-to-peak voltage. The recorded peak-to-peak voltage is the noise voltage parameter value, and the test result is uploaded to the test host computer through the communication interface for data recording.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. An information preprocessing module circuit test system, comprising:
the test circuit board tool is electrically connected to the information preprocessing module circuit to be tested and the test source table and is used for providing an electric connection interface and a test electric principle structure of corresponding parameters for the information preprocessing module circuit to be tested, and the circuit structure of the corresponding parameters is built by switching a relay on the test circuit board tool so as to realize corresponding electric parameter test;
the test source meters are respectively and electrically connected to the test circuit board tool and used for carrying out electrical parameter tests including source input and signal data acquisition; the test source table is connected to the test host and used for realizing automatic test and uploading test data to the test host;
the test circuit board tool comprises:
the input end of the signal input control circuit is electrically connected with the program control signal source of the test source meter, the output ends of the signal input control circuit are respectively electrically connected with two groups of signal input ends of the information preprocessing module circuit to be tested, and the signal input control circuit is used for controlling the corresponding signals output by the program control signal source to be connected into the two groups of signal input ends of the information preprocessing module circuit to be tested;
the input end of the alternating current parameter measurement control circuit is respectively and electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested, and the output end of the alternating current parameter measurement control circuit is respectively and electrically connected with the program control oscilloscope of the test source meter through a measurement end interface arranged on the test circuit board tool and is used for testing alternating current parameters of the information preprocessing module circuit to be tested;
and the input end of the direct current parameter measurement control circuit is respectively and electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested, and the output end of the direct current parameter measurement control circuit is electrically connected with the program control data acquisition unit of the test source meter through a measurement signal output port arranged on the test circuit board tool or sequentially through a differential signal amplification circuit and a measurement signal output port arranged on the test circuit board tool and is used for testing the direct current parameters of the information preprocessing module circuit to be tested.
2. The system for testing circuits of an information pre-processing module as claimed in claim 1, wherein: the signal input control circuit comprises a voltage division circuit and two relays (S4, S5), two voltage output ends of the voltage division circuit are respectively and electrically connected with one ends of normally closed contacts of the relays (S4, S5), and the other ends of the normally closed contacts of the relays (S4, S5) are grounded; two ends of a common contact of the relays (S4 and S5) are respectively connected with two groups of signal input ends of the information preprocessing module circuit to be tested; two ends of a normally open contact of the relay (S4, S5) are respectively and electrically connected with a signal output end of the noise signal source; and the signal switching module is used for switching the controllable signal output by the program control signal source or the noise signal output by the noise signal source into the information preprocessing module circuit to be detected through the control of the relay.
3. The system for testing circuits of an information pre-processing module as claimed in claim 1, wherein: the alternating current parameter measurement control circuit comprises two relays (S1 and S2), two ends of a pair of normally closed contacts of each relay (S1) are respectively and electrically connected with a first signal output end and a 10V reference pin of the information preprocessing module circuit to be tested, two ends of a pair of normally open contacts of each relay (S1) are respectively and electrically connected with a 5V reference pin and a second signal output end of the information preprocessing module circuit to be tested, and two ends of a pair of common contacts of each relay (S1) are respectively and electrically connected with two measurement end interfaces (J1 and J2) arranged on the test circuit board tool;
a normally closed contact of the relay (S2) is electrically connected with a-10V reference pin of the information preprocessing module circuit to be tested, a common contact of the relay (S2) is electrically connected with a measuring end interface (J3) arranged on a test circuit board tool, and a normally open contact of the relay (S2) is electrically connected with a third signal output end of the information preprocessing module circuit to be tested.
4. The system for testing circuits of an information pre-processing module as claimed in claim 1, wherein: the direct-current parameter measurement control circuit comprises relays (S3, S6 and S7), two ends of a pair of common contacts of the relays (S3, S6 and S7) are respectively and correspondingly electrically connected with three groups of signal output ends of the information preprocessing module circuit to be tested, two ends of a pair of normally closed contacts of the relays (S3, S6 and S7) are respectively and correspondingly electrically connected with measurement signal output ports (J4, J7 and J13) arranged on a test circuit board tool, and two ends of a pair of normally open contacts of the relays (S3, S6 and S7) are respectively and electrically connected with the differential signal amplifying circuit.
5. The system for testing circuits of an information pre-processing module as claimed in claim 4, wherein: the differential signal amplifying circuit comprises three operational amplifiers (U1, U2 and U3), and two input ends of the three operational amplifiers (U1, U2 and U3) are respectively and correspondingly electrically connected with two ends of a pair of normally open contacts of the relay (S3, S6 and S7); the output end of the operational amplifier U1 is electrically connected with the measurement signal output port (J5), and the output ends of the operational amplifiers U2 and U3 are respectively electrically connected with the measurement signal output port (J8); and the three groups of output signals are used for respectively carrying out differential amplification on the three groups of output signals of the information preprocessing module circuit to be detected and then transmitting the signals to the program control oscilloscope.
6. The system for testing an information preprocessing module circuit according to any one of claims 1-5, wherein: the test source meter comprises a program-controlled power supply, a program-controlled signal source, a program-controlled matrix switch module, a program-controlled oscilloscope and a program-controlled data acquisition unit; the programmable power supply is electrically connected with a power interface arranged on the test circuit board tool and used for supplying power to the test circuit board tool; the output end of the program control signal source is electrically connected with the input end of a voltage division circuit in the signal input control circuit and is used for outputting a controllable signal to the signal input control circuit; the normally open contacts of the control channels of the program control matrix switch module are respectively and electrically connected with each relay on the test circuit board tool and used for controlling the action of each relay so as to build a test circuit structure with corresponding parameters; the input end of the program control oscilloscope is electrically connected with a measuring end interface arranged on a test circuit board tool and used for testing the alternating current parameters of the information preprocessing module circuit to be tested; the input end of the program control data acquisition unit is electrically connected with a measurement signal output port arranged on the test circuit board tool and used for testing the direct current parameters of the information preprocessing module circuit to be tested.
7. The system for testing circuits of an information pre-processing module as claimed in claim 6, wherein: and one of the program-controlled oscilloscopes is connected with the measuring end interface, and the other three program-controlled oscilloscopes are respectively and electrically connected with a measuring signal output port arranged on the test circuit board tool and used for monitoring the direct current output waveform of the information preprocessing module circuit to be detected and detecting whether the self-excitation phenomenon exists or not.
8. The system for testing circuits of an information pre-processing module as claimed in claim 4, wherein: two ends of a pair of normally closed contacts of the relays (S3, S6 and S7) are grounded through a load resistor respectively, and the relays are used for testing the direct-current voltage output by the information preprocessing module circuit to be tested under a certain load and ensuring that the output direct-current voltage has certain loading capacity.
9. The system for testing circuits of an information pre-processing module as claimed in claim 5, wherein: the operational amplifiers (U1, U2 and U3) respectively adopt OP07, a resistor is respectively connected between the output end and the inverting input end of each operational amplifier, two power supply input ends of each operational amplifier are respectively grounded through a capacitor, and two input ends of each operational amplifier are respectively electrically connected with a corresponding relay (S3, S6 or S7) through a current-limiting resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111542670.2A CN114384396A (en) | 2021-12-16 | 2021-12-16 | Information preprocessing module circuit test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111542670.2A CN114384396A (en) | 2021-12-16 | 2021-12-16 | Information preprocessing module circuit test system |
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| Publication Number | Publication Date |
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| CN114384396A true CN114384396A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111542670.2A Pending CN114384396A (en) | 2021-12-16 | 2021-12-16 | Information preprocessing module circuit test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115328006A (en) * | 2022-10-13 | 2022-11-11 | 苏州华兴源创科技股份有限公司 | Signal control circuit |
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2021
- 2021-12-16 CN CN202111542670.2A patent/CN114384396A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115328006A (en) * | 2022-10-13 | 2022-11-11 | 苏州华兴源创科技股份有限公司 | Signal control circuit |
| CN115328006B (en) * | 2022-10-13 | 2023-01-20 | 苏州华兴源创科技股份有限公司 | Signal control circuit |
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