CN215768869U - Automatic test circuit and test system for control board - Google Patents
Automatic test circuit and test system for control board Download PDFInfo
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- CN215768869U CN215768869U CN202121189069.5U CN202121189069U CN215768869U CN 215768869 U CN215768869 U CN 215768869U CN 202121189069 U CN202121189069 U CN 202121189069U CN 215768869 U CN215768869 U CN 215768869U
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Abstract
The utility model discloses an automatic test circuit and a test system for control boards, wherein the automatic test circuit for control boards is used for testing a plurality of control boards simultaneously and comprises a control circuit, a state switching circuit and a plurality of switch circuits which are in one-to-one correspondence with the control boards to be tested; the state switching circuit is connected with the control circuit, the state switching circuit is connected with the control panels to be tested, each switch circuit is connected with the control circuit, and each switch circuit is connected with each corresponding control panel to be tested; each switch circuit controls the corresponding control panel to be tested to be started when receiving the starting signal output by the control circuit; when the state switching circuit receives the state switching signal output by the control circuit, the state switching circuit controls the plurality of control boards to be tested to enter a working state corresponding to the state switching signal; the control circuit acquires a state parameter corresponding to the working state of the control panel to be tested. The automatic test circuit for the control board solves the technical problem that the function test mode of the existing control board is low in efficiency.
Description
Technical Field
The utility model belongs to the technical field of electronics, and particularly relates to an automatic test circuit and an automatic test system for a control board.
Background
In the related art, the control panels of electronic products such as electronic cigarettes need to be subjected to functional testing before leaving factories to ensure that the control panels can normally run in each working state, and the existing testing method is to test each control panel independently, so that the next control panel can be tested after one control panel is tested, the testing efficiency is very low, a large amount of manpower and material resources are consumed in the testing process, and the production rate of the products is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide an automatic test circuit for a control board, which aims to solve the technical problem of low efficiency of the existing test method for the function of the control board.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the control panel automatic test circuit is used for simultaneously testing a plurality of control panels to be tested and is characterized by comprising a control circuit, a state switching circuit and a plurality of switch circuits, wherein the switch circuits are arranged in one-to-one correspondence with the control panels to be tested; the input end of the state switching circuit is electrically connected with the first signal output end of the control circuit, the output end of the state switching circuit is used for being electrically connected with the plurality of control panels to be tested, the input end of each switch circuit is electrically connected with the second signal output end of the control circuit, and the output end of each switch circuit is used for being electrically connected with each corresponding control panel to be tested; wherein the content of the first and second substances,
each switch circuit is used for controlling the corresponding control panel to be tested to be started when receiving the starting signal output by the control circuit;
the state switching circuit is used for controlling the plurality of control boards to be tested to enter a working state corresponding to the state switching signal when receiving the state switching signal output by the control circuit;
the control circuit is used for outputting the starting signal to the switch circuit, outputting the state switching signal to the state switching circuit, and acquiring the state parameters corresponding to the working state when the control boards to be tested enter the working state.
Further, the state switching circuit comprises a power supply circuit, and the state switching signal comprises a static opening signal and a static closing signal; the input end of the power supply circuit is electrically connected with the first signal output end of the control circuit, and the output end of the power supply circuit is used for being electrically connected with the control boards to be tested;
the power supply circuit is used for controlling the plurality of control boards to be tested to enter a static running state when receiving the static opening signal output by the control circuit, and controlling the plurality of control boards to be tested to exit the static running state when receiving the static closing signal output by the control circuit;
the control circuit is specifically configured to output the static on signal and the static off signal to the power supply circuit, and to obtain a plurality of static currents of the control boards to be tested when the control boards to be tested enter the static operating state.
Furthermore, the power supply circuit comprises a plurality of first double-pole double-throw relays which are arranged in one-to-one correspondence with the control boards to be tested, and the first double-pole double-throw relays are connected in parallel; each of the switching circuits includes a second double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each first double-pole double-throw relay is electrically connected with the first signal output end of the control circuit, and the other coil connecting pin of each first double-pole double-throw relay is grounded;
two normally open and normally closed common pins of each first double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of a power supply;
two normally-open connecting pins of each first double-pole double-throw relay are respectively and electrically connected with two normally-open normally-closed common pins of each second double-pole double-throw relay;
one coil connecting pin of each second double-pole double-throw relay is electrically connected with the second signal output end of the control circuit, and the other coil connecting pin of each second double-pole double-throw relay is grounded;
and the two normally open connecting pins of each second double-pole double-throw relay are respectively used for connecting the positive electrode and the negative electrode of the corresponding control board to be tested.
Further, the state switching circuit further comprises a charging circuit, and the state switching signal further comprises a charging on signal and a charging off signal; the input end of the charging circuit is electrically connected with the first signal output end of the control circuit, and the output end of the charging circuit is used for being electrically connected with the control panels to be tested;
the charging circuit is used for controlling the control panels to be tested to enter a charging state when receiving the charging start signal output by the control circuit, and controlling the control panels to be tested to exit the charging state when receiving the charging stop signal output by the control circuit;
the control circuit is specifically further configured to output the charging start signal to the charging circuit after the control panel to be tested enters the static running state, and to acquire a plurality of charging currents of the control panel to be tested when the control panel to be tested enters the charging state.
Furthermore, the charging circuit comprises a plurality of third double-pole double-throw relays corresponding to the control boards to be tested, and the plurality of third double-pole double-throw relays are connected in parallel; each of the switching circuits includes a fourth double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each third double-pole double-throw relay is electrically connected with the first signal output end of the control circuit, and the other coil connecting pin of each third double-pole double-throw relay is grounded;
two normally open and normally closed common pins of each third double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of a charging power supply;
two normally-open connecting pins of each third double-pole double-throw relay are respectively and electrically connected with two normally-open normally-closed common pins of each fourth double-pole double-throw relay;
one coil connecting pin of each fourth double-pole double-throw relay is electrically connected with the second signal output end of the control circuit, and the other coil connecting pin of each fourth double-pole double-throw relay is grounded;
and two normally open connecting pins of each fourth double-pole double-throw relay are respectively used for connecting the corresponding anode and cathode of the control board to be tested.
Furthermore, each of the switch circuits further includes a first control switch, one coil connection pin of each of the second double-pole double-throw relays is electrically connected to the second signal output terminal of the control circuit through the first control switch, and one coil connection pin of each of the fourth double-pole double-throw relays is electrically connected to the second signal output terminal of the control circuit through the first control switch.
Furthermore, the power supply circuit further comprises a second control switch, and one coil connecting pin of each first double-pole double-throw relay is electrically connected with the first signal output end of the control circuit through the second control switch.
Furthermore, the charging circuit further comprises a third control switch, and one coil connecting pin of each third double-pole double-throw relay is electrically connected with the first signal output end of the control circuit through the third control switch.
Further, each of the first double-pole double-throw relay, each of the second double-pole double-throw relay, each of the third double-pole double-throw relay, and each of the fourth double-pole double-throw relay has a protection circuit connected in parallel with both ends of the coil.
Further, the state switching circuit comprises a load circuit, and the state switching signal comprises a load on signal and a load off signal; the input end of the load circuit is electrically connected with the first signal output end of the control circuit, and the output end of the load circuit is used for being electrically connected with the control boards to be tested;
the load circuit is used for controlling the control panels to be tested to enter a load running state when receiving the load starting signal output by the control circuit, and controlling the control panels to be tested to exit the load running state when receiving the load closing signal output by the control circuit;
the control circuit is specifically configured to output the load-on signal and the load-off signal to the load circuit, and to obtain load voltages of the plurality of control boards to be tested when the plurality of control boards to be tested enter the load operating state.
Furthermore, the load circuit comprises a plurality of fifth double-pole double-throw relays which are arranged in one-to-one correspondence with the control boards to be tested, and the fifth double-pole double-throw relays are connected in parallel; each of the switching circuits includes a sixth double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each fifth double-pole double-throw relay is electrically connected with the first signal output end of the control circuit, and the other coil connecting pin of each fifth double-pole double-throw relay is grounded;
the first normally open and normally closed common pin of each fifth double-pole double-throw relay is used for connecting a load element;
the first normally-open connecting pin of each fifth double-pole double-throw relay corresponding to the first normally-open normally-closed common pin of each fifth double-pole double-throw relay is electrically connected with the second normally-open normally-closed common pin of each sixth double-pole double-throw relay;
one coil connecting pin of each sixth double-pole double-throw relay is electrically connected with the second signal output end of the control circuit, and the other coil connecting pin of each sixth double-pole double-throw relay is grounded;
and a second normally open connecting pin of each sixth double-pole double-throw relay is used for connecting the corresponding input end of the control board to be tested.
Furthermore, each switch circuit further comprises a first control switch, and one coil connecting pin of each sixth double-pole double-throw relay is electrically connected with a second signal output end of the control circuit through the first control switch;
furthermore, the load circuit further comprises a fourth control switch, and one coil connecting pin of each fifth double-pole double-throw relay is electrically connected with the first signal output end of the control circuit through the fourth control switch;
further, each of the fifth double-pole double-throw relay and the sixth double-pole double-throw relay has a protection circuit connected in parallel to both ends of the coil.
Correspondingly, the utility model also provides a test system, which comprises a computer and the automatic test circuit of the control board; the computer is connected with the automatic control board test circuit and is configured to output a test instruction to the automatic control board test circuit and collect and record the state parameters fed back by the automatic control board test circuit.
Compared with the prior art, the utility model has the beneficial effects that:
the control board automatic test circuit provided by the utility model has the advantages that the control circuit sends the starting signal to start the control boards to be tested, so that the started control boards to be tested can enter the working state at any time under the control of the state switching circuit, and the control circuit sends different state switching signals to the state switching circuit to enable the started control boards to be tested to enter the working state corresponding to the state switching signals, so that the control circuit can obtain the state parameters of the control boards to be tested in different working states to finish the test. The whole testing process is automatically controlled and executed by a program, manual intervention is not needed in the testing process, the testing efficiency of the control panel is effectively improved, a large amount of manpower and material resources are saved, and the production efficiency of electronic products is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit structure of an automatic test circuit of a control board according to an embodiment of the present invention;
FIG. 2 is a partial circuit diagram of a switch circuit according to another embodiment of the present invention;
FIG. 3 is a partial circuit block diagram of a power supply circuit according to another embodiment of the present invention;
FIG. 4 is a circuit diagram of a charging circuit according to another embodiment of the present invention;
fig. 5 is a partial circuit configuration diagram of a load circuit according to another embodiment of the present invention.
Description of reference numerals:
the device comprises a control circuit 1, a state switching circuit 2, a power supply circuit 21, a charging circuit 22, a load circuit 23, a switch circuit 3, a control board to be tested 4, a third control switch K22, a second control switch K23 and a fourth control switch K25.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an automatic control board test circuit, which is configured to test a plurality of control boards 4 to be tested at the same time, and is characterized in that the automatic control board test circuit includes a control circuit 1, a state switching circuit 2, and a plurality of switch circuits 3 that are arranged in one-to-one correspondence with the plurality of control boards 4 to be tested; the input end of the state switching circuit 2 is electrically connected with the first signal output end of the control circuit 1, the output end of the state switching circuit 2 is used for being electrically connected with the plurality of control boards 4 to be tested, the input end of each switch circuit 3 is electrically connected with the second signal output end of the control circuit 1, and the output end of each switch circuit 3 is used for being electrically connected with each corresponding control board 4 to be tested; wherein the content of the first and second substances,
each switch circuit 3 is used for controlling the corresponding control panel 4 to be tested to be opened when receiving the opening signal output by the control circuit 1;
the state switching circuit 2 is used for controlling the plurality of control boards 4 to be tested to enter a working state corresponding to the state switching signal when receiving the state switching signal output by the control circuit 1;
the control circuit 1 is configured to output a start signal to the switch circuit 3, output a state switching signal to the state switching circuit 2, and acquire a state parameter corresponding to a working state when the plurality of control boards 4 to be tested enter the working state.
In order to explain the control principle, the work flow, and the like of the automatic control board test circuit, the embodiments of this embodiment and the subsequent extensions are explained based on the case where the number of the control boards 4 to be tested that are used for testing in each batch is twenty, and the number of the control boards 4 to be tested that can be simultaneously tested by the automatic control board test circuit at one time is eight. Correspondingly, the number of the switch circuits 3 is also eight.
Specifically, in this embodiment, the control board automatic test circuit has a connection interface for electrically connecting with the control board 4 to be tested, preferably, the connection interface is a row bus welded on the test circuit board and electrically connected with the control board automatic test circuit, and a row pin matched with the row bus is welded on the jointed board having twenty control boards 4 to be tested. When the test is needed, firstly, the jointed board is inserted into the test circuit board, and the twenty control boards to be tested 4 are electrically connected with the automatic test circuit of the control boards in a pin row female connection mode. After the control panel 4 to be tested is deployed, a test program is started through external equipment such as a computer, so that the automatic test circuit of the control panel enters an automatic test flow, and the test process is as follows:
the second signal output end of the control circuit 1 outputs a start signal to eight of the switch circuits 3, and the switch circuits 3 respectively control the eight control boards to be tested 4 corresponding to the start signal to be started after receiving the start signal, so that the started eight control boards to be tested 4 can be controlled by the state switching circuit 2 to enter a working state at any time, and the other twelve control boards to be tested 4 which are not started cannot be controlled by the state switching circuit 2 to enter the working state. Then, a first signal output end of the control circuit 1 outputs a first state switching signal to the state switching circuit 2, when receiving the first state switching signal, the state switching circuit 2 controls the opened eight control boards to be tested 4 to simultaneously enter a first working state corresponding to the first state switching signal, and after the eight control boards to be tested 4 all enter the first working state, the control circuit 1 automatically acquires first state parameters of the eight control boards to be tested 4 in the first working state; after the first state parameter is obtained, the first signal output end of the control circuit 1 outputs a second state switching signal to the state switching circuit 2, when the state switching circuit 2 receives the second state switching signal, the opened eight control panels 4 to be tested are controlled to simultaneously enter a second working state corresponding to the second state switching signal, and after the eight control panels 4 to be tested all enter the second working state, the control circuit 1 automatically obtains second state parameters of the eight control panels 4 to be tested in the second working state; after the second state parameters are obtained, the first signal output end of the control circuit 1 outputs a third state switching signal to the state switching circuit 2 and repeats the above process until all the state parameters of the eight control boards to be tested 4 in different working states are obtained by the control circuit 1, and then the eight control boards to be tested 4 are tested.
After the eight control boards to be tested 4 are tested, the second signal output end of the control circuit 1 outputs an opening signal to the other eight switch circuits 3, the eight switch circuits 3 respectively control the eight control boards to be tested 4 corresponding to the eight switch circuits to be opened after receiving the opening signal, meanwhile, the eight control boards to be tested 4 which are opened before are closed, the eight control boards to be tested 4 which are newly opened can enter a working state at any time under the control of the state switching circuit 2, the other twelve control boards to be tested 4 which are not opened can not enter the working state under the control of the state switching circuit 2, and then the same test steps as those of the eight control boards to be tested 4 in the previous group are repeated for the eight control boards to be tested 4 which are newly opened. After all the state parameters of the newly opened eight control panels to be tested 4 in different working states are obtained by the control circuit 1, the second signal output end of the control circuit 1 outputs an opening signal to the last four switch circuits 3, the four switch circuits 3 respectively control the last four control panels to be tested 4 corresponding to the opening signal to be opened after receiving the opening signal, meanwhile, the eight control panels to be tested 4 which are opened before are closed, at this time, the newly opened four control panels to be tested 4 can enter the working state at any time under the control of the state switching circuit 2, and the other sixteen control panels to be tested 4 which are not opened can not enter the working state under the control of the state switching circuit 2. And then repeating the same test steps as those of the eight control boards 4 to be tested of the previous group for the last four control boards 4 to be tested which are newly opened, and after all state parameters of the last four control boards 4 to be tested which are newly opened and are in different working states are obtained by the control circuit 1, finishing the test of all twenty control boards 4 to be tested on the jointed board.
After the test of the jointed board is finished, the jointed board can be taken down from the test circuit board and replaced by the next jointed board for the next round of test, the test flow is the same as that of the previous jointed board, and the description is omitted here.
Therefore, in the automatic test circuit for control boards provided by this embodiment, the control circuit 1 sends the start signal to start the control boards 4 to be tested, so that the started control boards 4 to be tested can enter the working state at any time under the control of the state switching circuit 2, and the control circuit 1 sends different state switching signals to the state switching circuit 2 to make the started control boards 4 to be tested enter the working state corresponding to the state switching signals, so that the control circuit 1 can obtain the state parameters of the control boards 4 to be tested in different working states to complete the test. The whole testing process is automatically controlled and executed by a program, manual intervention is not needed in the testing process, the testing efficiency of the control panel is effectively improved, a large amount of manpower and material resources are saved, and the production efficiency of electronic products is improved.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the state switching circuit 2 includes a power supply circuit 21, and the state switching signal includes a static on signal and a static off signal; the input end of the power supply circuit 21 is electrically connected with the first signal output end of the control circuit 1, and the output end of the power supply circuit 21 is used for being electrically connected with the control boards 4 to be tested;
the power supply circuit 21 is used for controlling the plurality of control boards 4 to be tested to enter a static running state when receiving a static opening signal output by the control circuit 1, and controlling the plurality of control boards 4 to be tested to exit the static running state when receiving a static closing signal output by the control circuit 1;
the control circuit 1 is specifically configured to output a static on signal and a static off signal to the power supply circuit 21, and is configured to obtain the static currents of the control boards 4 to be tested when the control boards 4 to be tested enter a static operation state.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the power supply circuit 21 includes a plurality of first double-pole double-throw relays disposed in one-to-one correspondence with the plurality of control boards 4 to be tested, and the plurality of first double-pole double-throw relays are connected in parallel with each other; each switch circuit 3 includes a second double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each first double-pole double-throw relay is electrically connected with the first signal output end of the control circuit 1, and the other coil connecting pin of each first double-pole double-throw relay is grounded;
two normally open and normally closed common pins of each first double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of a power supply;
two normally open connecting pins of each first double-pole double-throw relay are respectively and electrically connected with two normally open normally closed common pins of each second double-pole double-throw relay;
one coil connecting pin of each second double-pole double-throw relay is electrically connected with the second signal output end of the control circuit 1, and the other coil connecting pin of each second double-pole double-throw relay is grounded;
and two normally open connecting pins of each second double-pole double-throw relay are respectively used for connecting the positive electrode and the negative electrode of the corresponding control board 4 to be tested.
Further, referring to fig. 1 to 5, in an exemplary embodiment, each switch circuit 3 further includes a first control switch (K1-K8), and one coil connecting pin of each second double-pole double-throw relay is electrically connected to the second signal output terminal of the control circuit 1 through the first control switch.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the power supply circuit 21 further includes a second control switch K23, and one of the coil connection pins of each first double-pole double-throw relay is electrically connected to the first signal output terminal of the control circuit 1 through the second control switch K23.
In the above embodiment, the number of the switch circuits 3 is eight, and each switch circuit 3 includes one second double-pole double-throw relay (the eight second double-pole double-throw relays are denoted by KA1_1 to KA8_1 in the figure); the first double-pole double-throw relays correspond to the control board 4 to be tested, and may specifically be one-to-one or one-to-many, and here, the power supply circuit 21 preferably includes eight first double-pole double-throw relays (the eight first double-pole double-throw relays are represented by KA23_1 to KA23_8 in the drawing) corresponding to the control board 4 to be tested. For the control board automatic test circuit with the power supply circuit 21 in the state switching circuit 2, the specific process and principle of obtaining the quiescent current of the control board 4 to be tested in the quiescent state are as follows:
in the testing process, the control circuit 1 controls the first control switch (K1-K8) to be switched from open to closed (specifically, the control circuit 1 sends high level signals to the first control switch K1-K8), and a coil in the second double-pole double-throw relay is electrified, so that two groups of normally closed contacts of each second double-pole double-throw relay are simultaneously opened (namely, the connection between the two normally closed connection pins 2 and 7 and the two normally open and normally closed common connection pins 3 and 6 is disconnected), and two groups of normally open contacts are simultaneously conducted (namely, the two normally open connection pins 4 and 5 are conducted with the two normally open and normally closed common connection pins 3 and 6); meanwhile, the control circuit 1 controls the second control switch K23 to be switched on from off (specifically, the control circuit 1 sends a high-level signal to the second control switch K23), and a coil in each first double-pole double-throw relay is energized, so that two groups of normally closed contacts of each first double-pole double-throw relay are simultaneously opened (namely, the connection between the two normally closed connection pins 2 and 7 and the two normally open and normally closed common connection pins 3 and 6 is broken), and two groups of normally open contacts of each first double-pole double-throw relay are simultaneously conducted (namely, the two normally open connection pins 4 and 5 and the two normally open and normally closed common connection pins 3 and 6 are conducted); therefore, the power supply is conducted with the eight control panels to be tested 4 through the eight first double-pole double-throw relays and the eight second double-pole double-throw relays, the eight control panels to be tested 4 enter a static operation state, and the control circuit 1 can obtain the static current of the eight control panels to be tested 4 at the moment.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the state switching circuit 2 further includes a charging circuit 22, and the state switching signal further includes a charging-on signal and a charging-off signal; the input end of the charging circuit 22 is electrically connected with the first signal output end of the control circuit 1, and the output end of the charging circuit 22 is used for being electrically connected with the control boards 4 to be tested;
the charging circuit 22 is used for controlling the plurality of control boards to be tested 4 to enter a charging state when receiving a charging start signal output by the control circuit 1, and controlling the plurality of control boards to be tested 4 to exit the charging state when receiving a charging stop signal output by the control circuit 1;
the control circuit 1 is specifically configured to output a charging start signal to the charging circuit 22 after the control boards 4 to be tested enter the static operation state, and is configured to obtain charging currents of the control boards 4 to be tested when the control boards 4 to be tested enter the charging state.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the charging circuit 22 includes a plurality of third double-pole double-throw relays corresponding to the plurality of control boards 4 to be tested, and the plurality of third double-pole double-throw relays are connected in parallel with each other; each switch circuit 3 includes a fourth double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each third double-pole double-throw relay is electrically connected with the first signal output end of the control circuit 1, and the other coil connecting pin of each third double-pole double-throw relay is grounded;
two normally open and normally closed common pins of each third double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of a charging power supply;
two normally-open connecting pins of each third double-pole double-throw relay are respectively and electrically connected with two normally-open normally-closed common pins of each fourth double-pole double-throw relay;
one coil connecting pin of each fourth double-pole double-throw relay is electrically connected with the second signal output end of the control circuit 1, and the other coil connecting pin of each fourth double-pole double-throw relay is grounded;
and the two normally open connecting pins of each fourth double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of the corresponding control board 4 to be tested.
Further, referring to fig. 1 to 5, in an exemplary embodiment, each switch circuit 3 further includes a first control switch (K1-K8), and one coil connecting pin of each fourth double-pole double-throw relay is electrically connected to the second signal output terminal of the control circuit 1 through the first control switch.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the charging circuit 22 further includes a third control switch K22, and one coil connecting pin of each third double-pole double-throw relay is electrically connected to the first signal output terminal of the control circuit 1 through the third control switch K22.
In the above embodiment, the number of the switch circuits 3 is eight, and each switch circuit 3 includes one fourth double-pole double-throw relay (the eight fourth double-pole double-throw relays are denoted by KA1_2 to KA8_2 in the drawing); the third double-pole double-throw relay corresponds to the control board 4 to be tested, and may specifically be one-to-one or one-to-many, and here, preferably, the charging circuit 22 includes a third double-pole double-throw relay (the third double-pole double-throw relay is represented by KA22_1 in the figure), and the third double-pole double-throw relay corresponds to eight control boards 4 to be tested. For the control board automatic test circuit provided with the power supply circuit 21 and the charging circuit 22 in the state switching circuit 2, the specific process and principle of obtaining the charging current of the control board 4 to be tested in the charging state are as follows:
in the testing process, when the first control switch (K1-K8) and the second control switch K23 are both closed and the eight control panels 4 to be tested are in a static running state, because the first control switch (K1-K8) is closed, the coils in the fourth double-pole double-throw relays are electrified, so that two groups of normally closed contacts of each fourth double-pole double-throw relay are simultaneously disconnected (namely the connection between the two normally closed connecting pins 2 and 7 and the two normally open and normally closed common connecting pins 3 and 6 is disconnected), and two groups of normally open contacts are simultaneously conducted (namely the two normally open connecting pins 4 and 5 and the two normally open and normally closed common connecting pins 3 and 6 are conducted); at this time, the control circuit 1 controls the third control switch K22 to be turned on from off (specifically, the control circuit 1 sends a high level signal to the third control switch K22), and a coil in the third double-pole double-throw relay is energized, so that two groups of normally closed contacts of the third double-pole double-throw relay are simultaneously opened (i.e., the connection between the two normally closed connection pins 2 and 7 and the two normally open and normally closed common connection pins 3 and 6 is broken), and two groups of normally open contacts of the third double-pole double-throw relay are simultaneously turned on (i.e., the two normally open connection pins 4 and 5 are conducted with the two normally open and normally closed common connection pins 3 and 6); therefore, the 220V charging power supply is conducted with the eight control panels to be tested 4 through the third double-pole double-throw relay and the eight fourth double-pole double-throw relays, the eight control panels to be tested 4 enter a charging state, and the control circuit 1 can obtain the charging current of the eight control panels to be tested 4 at the moment.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the state switching circuit 2 includes a load circuit 23, and the state switching signal includes a load-on signal and a load-off signal; the input end of the load circuit 23 is electrically connected with the first signal output end of the control circuit 1, and the output end of the load circuit 23 is used for being electrically connected with the control boards 4 to be tested.
The load circuit 23 is configured to control the plurality of control boards 4 to be tested to enter a load running state when receiving a load on signal output by the control circuit 1, and to control the plurality of control boards 4 to be tested to exit the load running state when receiving a load off signal output by the control circuit 1.
The control circuit 1 is specifically configured to output a load-on signal and a load-off signal to the load circuit 23, and to obtain load voltages of the control boards 4 to be tested when the control boards 4 to be tested enter a load running state.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the load circuit 23 includes a plurality of fifth double-pole double-throw relays disposed in one-to-one correspondence with the plurality of control boards 4 to be tested, and the plurality of fifth double-pole double-throw relays are connected in parallel with each other; each switch circuit 3 includes a sixth double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each fifth double-pole double-throw relay is electrically connected with the first signal output end of the control circuit 1, and the other coil connecting pin of each fifth double-pole double-throw relay is grounded;
the first normally open and normally closed common pin of each fifth double-pole double-throw relay is used for connecting a load element;
the first normally-open connecting pin of each fifth double-pole double-throw relay corresponding to the first normally-open normally-closed common pin of each fifth double-pole double-throw relay is electrically connected with the second normally-open normally-closed common pin of each sixth double-pole double-throw relay;
one coil connecting pin of each sixth double-pole double-throw relay is electrically connected with the second signal output end of the control circuit 1, and the other coil connecting pin of each sixth double-pole double-throw relay is grounded;
and a second normally-open connecting pin of each sixth double-pole double-throw relay is used for connecting the input end of the corresponding control panel 4 to be tested.
Further, referring to fig. 1 to 5, in an exemplary embodiment, each switch circuit 3 further includes a first control switch (K1-K8), and one coil connecting pin of each sixth double-pole double-throw relay is electrically connected to the second signal output terminal of the control circuit 1 through the first control switch.
Further, referring to fig. 1 to 5, in an exemplary embodiment, the load circuit 23 further includes a fourth control switch K25, and one of the coil connection pins of each fifth double-pole double-throw relay is electrically connected to the first signal output terminal of the control circuit 1 through the fourth control switch K25.
In the above embodiment, the number of the switch circuits 3 is eight, and each switch circuit 3 includes one sixth double-pole double-throw relay (the eight sixth double-pole double-throw relays are denoted by KA1_3 to KA8_3 in the drawing); the fifth double-pole double-throw relays correspond to the control boards 4 to be tested, and may specifically be in a one-to-one correspondence or one-to-many correspondence, and here, the preferred load circuit 23 includes eight fifth double-pole double-throw relays corresponding to the control boards 4 to be tested one-to-one (the eight fifth double-pole double-throw relays are represented by KA25_1 to KA25_8 in the drawing). For a control board automatic test circuit provided with a load circuit 23 in the state switching circuit 2, a specific process and principle for acquiring a load voltage of the control board 4 to be tested in a load running state are as follows:
in the test process, the control circuit 1 controls the first control switches (K1-K8) to be switched from open to closed (specifically, the control circuit 1 sends high level signals to the first control switches K1-K8), and the coils in the sixth double-pole double-throw relays are electrified, so that one group of normally closed contacts of each sixth double-pole double-throw relay are simultaneously opened (namely, the connection between the normally closed connecting pin 7 and the normally open and normally closed common connecting pin 6 is opened), and one group of normally open contacts corresponding to the group of normally closed contacts are simultaneously conducted (namely, the normally open connecting pin 5 and the normally open and normally closed common connecting pin 6 are conducted); meanwhile, the control circuit 1 controls the fourth control switch K25 to be switched on from off (specifically, the control circuit 1 sends a high-level signal to the fourth control switch K25), and a coil in each fifth double-pole double-throw relay is energized, so that one group of normally closed contacts of each fifth double-pole double-throw relay are simultaneously off (i.e., the connection between the normally closed connection pin 7 and the normally open and normally closed common connection pin 6 is disconnected), and one group of normally open contacts corresponding to the group of normally closed contacts are simultaneously on (i.e., the normally open connection pin 5 and the normally open and normally closed common connection pin 6 are connected); therefore, the load element is communicated with the eight control panels 4 to be tested through the eight fifth double-pole double-throw relays and the eight sixth double-pole double-throw relays, the eight control panels 4 to be tested are enabled to enter a load running state, and the control circuit 1 can obtain the load voltage of the eight control panels 4 to be tested.
Further, referring to fig. 1-5, in one exemplary embodiment, each first double pole double throw relay, each second double pole double throw relay has a protection circuit connected in parallel with both ends of the coil.
Further, referring to fig. 1-5, in an exemplary embodiment, each third double pole double throw relay, each fourth double pole double throw relay has a protection circuit connected in parallel with both ends of the coil.
Further, referring to fig. 1-5, in an exemplary embodiment, each fifth double pole double throw relay, each sixth double pole double throw relay has a protection circuit connected in parallel with both ends of the coil.
In the above embodiment, the protection circuit may include a diode and a capacitor, and specifically, the control switch is electrically connected to a first end of the capacitor and a first end of the coil, a second end of the capacitor and a second end of the coil are connected to the ground, respectively, an anode of the diode is electrically connected to the second end of the coil, and a cathode of the diode is electrically connected to the first end of the coil. The arrangement can form current through the conduction of the diode under the condition that the coil is powered off and generates reverse voltage, thereby releasing magnetic field energy stored in the coil, eliminating the reverse voltage, protecting other electronic elements and avoiding the breakdown of the reverse voltage of the coil. And capacitors are connected in parallel at two ends of the coil, so that the coil can be used as an energy release loop of the coil when power is off, the self-inductance voltage of the coil is restrained, and the safety of the circuit is further guaranteed.
In the specific implementation process, the composition of the protection circuit is not limited to the above manner, and the protection circuit only needs to protect other electronic elements and avoid the damage of the electronic elements under the condition that the coil is suddenly powered off.
Correspondingly, the utility model also provides a test system, which comprises a computer and the automatic test circuit of the control board; the computer is connected with the automatic control board test circuit and is configured to output test instructions to the automatic control board test circuit and collect and record state parameters fed back by the automatic control board test circuit.
In this embodiment, the control circuit 1 in the automatic control board test circuit can output corresponding level signals to each control switch according to test instructions sent by the computer to control the switching state of each double-pole double-throw relay, measure corresponding state parameter information, and feed the information back to the computer for recording and storing. Thanks to the improvement of the above-mentioned control board automatic test circuit, the test system of this embodiment has the same technical effect as the above-mentioned control board automatic test circuit, and is not described herein again.
It should be noted that other contents of the automatic test circuit and the test system for a control board disclosed in the present invention can be referred to in the prior art, and are not described herein again.
In addition, it should be noted that the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The control panel automatic test circuit is used for simultaneously testing a plurality of control panels to be tested and is characterized by comprising a control circuit, a state switching circuit and a plurality of switch circuits, wherein the switch circuits are arranged in one-to-one correspondence with the control panels to be tested; the input end of the state switching circuit is electrically connected with the first signal output end of the control circuit, the output end of the state switching circuit is used for being electrically connected with the plurality of control panels to be tested, the input end of each switch circuit is electrically connected with the second signal output end of the control circuit, and the output end of each switch circuit is used for being electrically connected with each corresponding control panel to be tested; wherein the content of the first and second substances,
each switch circuit is used for controlling the corresponding control panel to be tested to be started when receiving the starting signal output by the control circuit;
the state switching circuit is used for controlling the plurality of control boards to be tested to enter a working state corresponding to the state switching signal when receiving the state switching signal output by the control circuit;
the control circuit is used for outputting the starting signal to the switch circuit, outputting the state switching signal to the state switching circuit, and acquiring the state parameters corresponding to the working state when the control boards to be tested enter the working state.
2. The control board automatic test circuit of claim 1, wherein the state switching circuit comprises a power supply circuit, the state switching signal comprises a static on signal and a static off signal; the input end of the power supply circuit is electrically connected with the first signal output end of the control circuit, and the output end of the power supply circuit is used for being electrically connected with the control boards to be tested;
the power supply circuit is used for controlling the plurality of control boards to be tested to enter a static running state when receiving the static opening signal output by the control circuit, and controlling the plurality of control boards to be tested to exit the static running state when receiving the static closing signal output by the control circuit;
the control circuit is specifically configured to output the static on signal and the static off signal to the power supply circuit, and to obtain a plurality of static currents of the control boards to be tested when the control boards to be tested enter the static operating state.
3. The control board automatic test circuit according to claim 2, wherein the power supply circuit includes a plurality of first double-pole double-throw relays provided in one-to-one correspondence with the plurality of control boards to be tested, and the plurality of first double-pole double-throw relays are connected in parallel with each other; each of the switching circuits includes a second double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each first double-pole double-throw relay is electrically connected with the first signal output end of the control circuit, and the other coil connecting pin of each first double-pole double-throw relay is grounded;
two normally open and normally closed common pins of each first double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of a power supply;
two normally-open connecting pins of each first double-pole double-throw relay are respectively and electrically connected with two normally-open normally-closed common pins of each second double-pole double-throw relay;
one coil connecting pin of each second double-pole double-throw relay is electrically connected with the second signal output end of the control circuit, and the other coil connecting pin of each second double-pole double-throw relay is grounded;
and the two normally open connecting pins of each second double-pole double-throw relay are respectively used for connecting the positive electrode and the negative electrode of the corresponding control board to be tested.
4. The control board automatic test circuit according to claim 2, wherein the state switching circuit further comprises a charging circuit, the state switching signal further comprises a charging-on signal and a charging-off signal; the input end of the charging circuit is electrically connected with the first signal output end of the control circuit, and the output end of the charging circuit is used for being electrically connected with the control panels to be tested;
the charging circuit is used for controlling the control panels to be tested to enter a charging state when receiving the charging start signal output by the control circuit, and controlling the control panels to be tested to exit the charging state when receiving the charging stop signal output by the control circuit;
the control circuit is specifically further configured to output the charging start signal to the charging circuit after the control panel to be tested enters the static running state, and to acquire a plurality of charging currents of the control panel to be tested when the control panel to be tested enters the charging state.
5. The control board automatic test circuit according to claim 4, wherein the charging circuit includes a plurality of third double-pole double-throw relays corresponding to a plurality of the control boards to be tested, and the plurality of third double-pole double-throw relays are connected in parallel with each other; each of the switching circuits includes a fourth double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each third double-pole double-throw relay is electrically connected with the first signal output end of the control circuit, and the other coil connecting pin of each third double-pole double-throw relay is grounded;
two normally open and normally closed common pins of each third double-pole double-throw relay are respectively used for connecting the positive pole and the negative pole of a charging power supply;
two normally-open connecting pins of each third double-pole double-throw relay are respectively and electrically connected with two normally-open normally-closed common pins of each fourth double-pole double-throw relay;
one coil connecting pin of each fourth double-pole double-throw relay is electrically connected with the second signal output end of the control circuit, and the other coil connecting pin of each fourth double-pole double-throw relay is grounded;
and two normally open connecting pins of each fourth double-pole double-throw relay are respectively used for connecting the corresponding anode and cathode of the control board to be tested.
6. The control board automatic test circuit of claim 5, wherein each of the switch circuits further comprises a first control switch, one of the coil connection pins of each of the second double pole double throw relays is electrically connected to the second signal output terminal of the control circuit through the first control switch, and one of the coil connection pins of each of the fourth double pole double throw relays is electrically connected to the second signal output terminal of the control circuit through the first control switch;
and/or, the power supply circuit further comprises a second control switch, and one coil connecting pin of each first double-pole double-throw relay is electrically connected with the first signal output end of the control circuit through the second control switch;
and/or, the charging circuit further comprises a third control switch, and one coil connecting pin of each third double-pole double-throw relay is electrically connected with the first signal output end of the control circuit through the third control switch;
and/or each of the first double-pole double-throw relay, each of the second double-pole double-throw relay, each of the third double-pole double-throw relay and each of the fourth double-pole double-throw relay has a protection circuit connected in parallel with both ends of the coil.
7. The control board automatic test circuit of claim 1, wherein the state switching circuit comprises a load circuit, the state switching signal comprising a load on signal and a load off signal; the input end of the load circuit is electrically connected with the first signal output end of the control circuit, and the output end of the load circuit is used for being electrically connected with the control boards to be tested;
the load circuit is used for controlling the control panels to be tested to enter a load running state when receiving the load starting signal output by the control circuit, and controlling the control panels to be tested to exit the load running state when receiving the load closing signal output by the control circuit;
the control circuit is specifically configured to output the load-on signal and the load-off signal to the load circuit, and to obtain load voltages of the plurality of control boards to be tested when the plurality of control boards to be tested enter the load operating state.
8. The control board automatic test circuit according to claim 7, wherein the load circuit includes a plurality of fifth double-pole double-throw relays provided in one-to-one correspondence with the plurality of control boards to be tested, and the plurality of fifth double-pole double-throw relays are connected in parallel with each other; each of the switching circuits includes a sixth double-pole double-throw relay; wherein the content of the first and second substances,
one coil connecting pin of each fifth double-pole double-throw relay is electrically connected with the first signal output end of the control circuit, and the other coil connecting pin of each fifth double-pole double-throw relay is grounded;
the first normally open and normally closed common pin of each fifth double-pole double-throw relay is used for connecting a load element;
the first normally-open connecting pin of each fifth double-pole double-throw relay corresponding to the first normally-open normally-closed common pin of each fifth double-pole double-throw relay is electrically connected with the second normally-open normally-closed common pin of each sixth double-pole double-throw relay;
one coil connecting pin of each sixth double-pole double-throw relay is electrically connected with the second signal output end of the control circuit, and the other coil connecting pin of each sixth double-pole double-throw relay is grounded;
and a second normally open connecting pin of each sixth double-pole double-throw relay is used for connecting the corresponding input end of the control board to be tested.
9. The control board automatic test circuit of claim 8, wherein each of the switch circuits further comprises a first control switch, and one of the coil connection pins of each of the sixth double-pole double-throw relays is electrically connected to the second signal output terminal of the control circuit through the first control switch;
and/or, the load circuit further comprises a fourth control switch, and one coil connecting pin of each fifth double-pole double-throw relay is electrically connected with the first signal output end of the control circuit through the fourth control switch;
and/or each of the fifth double-pole double-throw relay and the sixth double-pole double-throw relay is provided with a protection circuit which is connected with two ends of the coil in parallel.
10. A test system comprising a computer and the control board automatic test circuit of any one of claims 1 to 9; the computer is connected with the automatic control board test circuit and is configured to output a test instruction to the automatic control board test circuit and collect and record the state parameters fed back by the automatic control board test circuit.
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| CN202121189069.5U CN215768869U (en) | 2021-05-28 | 2021-05-28 | Automatic test circuit and test system for control board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114755564A (en) * | 2022-05-20 | 2022-07-15 | 宁波壹科芯电子科技有限公司 | Switching circuit and switching method for electronic product circuit board test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114755564A (en) * | 2022-05-20 | 2022-07-15 | 宁波壹科芯电子科技有限公司 | Switching circuit and switching method for electronic product circuit board test |
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