Relay matrix printed circuit board

Abstract

The application provides a relay matrix printed circuit board, and belongs to the field of relay testing. The output end of a control module is connected with the input end of each driving module, the first output end of each driving module is connected with each row interface of a corresponding relay matrix, the second output end of each driving module is connected with each column interface of the corresponding relay matrix; the first contact of a first relay is connected with a first testing device, the second contact of the first relay and the second contact of at least one second relay share an external terminal; wherein the first relay and the second relay are located in different relay matrices and correspond in position; each driving module drives the action of each row relay and each column relay under the control of the control module, the first testing device is used for testing resistance parameters, and a second testing device tests power parameters via the external terminal. The application can achieve the effect of not being limited by circuit breaker wiring and flexibly testing the on-off, resistance parameters and power parameters between any two terminals.

Description

Technical Field

[0001] This application relates to the field of relay testing technology, and more specifically, to a relay matrix printed circuit board. Background Technology

[0002] In the industrial sector, frame-type circuit breakers are typically tested for electrical parameters before leaving the factory to ensure product quality and safety reliability.

[0003] Currently, the electrical parameter testing of frame circuit breakers is often carried out manually by installing fixtures one by one. The secondary terminals of frame circuit breakers typically have 32-64 connection points, and the attributes of customer-customized frame circuit breakers vary, resulting in numerous and complex definitions of these connection points. Therefore, this testing method not only requires a large amount of manpower but also suffers from low testing efficiency, low accuracy, and a high risk factor. Furthermore, to improve the efficiency and safety of frame circuit breaker measurements, existing technologies often use relay matrices to test the electrical parameters of frame circuit breakers. However, this method can only measure the resistance of the frame circuit breaker and cannot measure power signals such as current and voltage. Utility Model Content

[0004] The purpose of this application is to provide a relay matrix printed circuit board that can flexibly test the continuity, resistance parameters, and power parameters between any two terminals without being restricted by the circuit breaker wiring.

[0005] The embodiments of this application are implemented as follows: A first aspect of this application provides a relay matrix printed circuit board, which includes: a control module, multiple drive modules, multiple relay matrices, and multiple external terminals, wherein each relay matrix includes: multiple relays; The first output terminal of the control module is connected to the first input terminal of each drive module, the second output terminal of the control module is connected to the second input terminal of each drive module, the first output terminal of each drive module is connected to the row interface of the corresponding relay matrix, the second output terminal of the drive module is connected to the column interface of the corresponding relay matrix, the row interface of each relay matrix is ​​connected to the input terminal of each relay in the row, and the column interface of each relay matrix is ​​connected to the output terminal of each relay in the column. The first relay includes a first contact and a second contact. The first contact is externally connected to a test device. The second contact shares an external terminal with the second contacts of at least one second relay and is connected to the secondary terminal of the frame circuit breaker via the external terminal. The first relay and each second relay are located in different relay matrices, and the position of the first relay in the relay matrix corresponds to the position of the second relay in the relay matrix. Under the control of the control module, each drive module drives the operation of the corresponding row and column relays in the relay matrix. The test equipment tests the resistance and power parameters of the frame circuit breaker through the relay matrix.

[0006] As one possible implementation, multiple driving modules each include: row driving units and column driving units, and both row driving units and column driving units include: multiple first output terminals; The first input terminal of the row drive unit is connected to the first output terminal of the control module, and each first output terminal of the row drive unit is connected to the corresponding row interface of the relay matrix. The first input terminal of the column drive unit is connected to the second output terminal of the control module, and each first output terminal of the column drive unit is connected to the column interface of the corresponding relay matrix. The second input terminal of the row driving unit and the second input terminal of the column driving unit are both used to connect to the first power supply voltage, the third input terminal of the row driving unit and the third input terminal of the column driving unit are both used to connect to the second power supply voltage, and the second output terminal of the row driving unit and the second output terminal of the column driving unit are both grounded.

[0007] As one possible implementation, the above-mentioned row driving unit includes: a first filtering module, a first opto-isolation module, a first decoder, and a first driving chip, wherein the first driving chip includes: multiple output terminals; One end of the first filter module is connected to the first output terminal of the control module. The first end of the first opto-isolation module is grounded. The other end of the first filter module is connected to the second end of the first opto-isolation module. The fourth end of the first opto-isolation module is connected to the first power supply voltage. The third end of the first opto-isolation module is connected to the input terminal of the first decoder. The power supply terminal of the first decoder is connected to the first power supply voltage. The enable terminal of the first decoder is used to receive the enable signal. The output terminal of the first decoder is connected to the input terminal of the first driver chip. The power supply terminal of the first driver chip is connected to the second power supply voltage. Each output terminal of the first driver chip is connected to each row interface of the corresponding relay matrix. The ground terminal of the first driver chip and the ground terminal of the first decoder are both grounded.

[0008] As one possible implementation, the first filter module includes a first resistor, a second resistor, and a third resistor; the first opto-isolation module includes a first optocoupler, a second optocoupler, and a third optocoupler; and the first decoder includes multiple input terminals. One end of the first resistor, one end of the second resistor, and one end of the third resistor are all connected to the first output terminal of the control module, and the first end of the first optocoupler, the first end of the second optocoupler, and the first end of the third optocoupler are all grounded. The other end of the first resistor is connected to the second end of the first optocoupler, the other end of the second resistor is connected to the second end of the second optocoupler, the other end of the third resistor is connected to the second end of the third optocoupler, and the third ends of the first optocoupler, the second optocoupler, and the third optocoupler are respectively connected to the input ends of the first decoder. The fourth terminals of the first optocoupler, the second optocoupler, and the third optocoupler are all used to connect to the first power supply voltage. The first decoder is used to translate the optocoupler signals output by the first optocoupler, the second optocoupler, and the third optocoupler into the corresponding row drive signals of the relay matrix under the action of the enable signal.

[0009] As one possible implementation, the column driving unit mentioned above includes: a second filter module, a second opto-isolation module, a second decoder, and a second driving chip, wherein the second driving chip includes: multiple output terminals; One end of the second filter module is connected to the second output terminal of the control module. The first end of the second opto-isolation module is grounded. The other end of the second filter module is connected to the second end of the second opto-isolation module. The fourth end of the second opto-isolation module is connected to the first power supply voltage. The third end of the second opto-isolation module is connected to the input terminal of the second decoder. The power supply terminal of the second decoder is connected to the first power supply voltage. The enable terminal of the second decoder is used to receive the enable signal. The output terminal of the second decoder is connected to the input terminal of the second driver chip. The power supply terminal of the second driver chip is connected to the second power supply voltage. Each output terminal of the second driver chip is connected to each column interface of the corresponding relay matrix. The ground terminal of the second driver chip and the ground terminal of the second decoder are both grounded.

[0010] As one possible implementation, the second filter module includes a fourth resistor, a fifth resistor, and a sixth resistor; the second opto-isolation module includes a fourth optocoupler, a fifth optocoupler, and a sixth optocoupler; and the second decoder includes multiple input terminals. One end of the fourth resistor, one end of the fifth resistor, and one end of the sixth resistor are all connected to the second output terminal of the control module, and the first ends of the fourth optocoupler, the fifth optocoupler, and the sixth optocoupler are all grounded. The other end of the fourth resistor is connected to the second end of the fourth optocoupler, the other end of the fifth resistor is connected to the second end of the fifth optocoupler, the other end of the sixth resistor is connected to the second end of the sixth optocoupler, and the third ends of the fourth optocoupler, the fifth optocoupler, and the sixth optocoupler are respectively connected to the input ends of the second decoder. The fourth terminal of the fourth optocoupler, the fourth terminal of the fifth optocoupler, and the fourth terminal of the sixth optocoupler are all used to connect to the first power supply voltage; The second decoder is used to translate the optocoupler signals output by the fourth, fifth, and sixth optocouplers into the corresponding column drive signals of the relay matrix under the action of the enable signal.

[0011] As one possible implementation, the aforementioned drive module also includes: a block array and an enable control unit; The block array is connected to both the row drive unit and the column drive unit; The first terminal of the enable control unit is grounded, the second terminal of the enable control unit is used to connect to the enable control signal, the third terminal of the enable control unit is used to connect to the enable signal, the third terminal of the enable control unit is also connected to the enable terminal of the block array, the row drive unit and the column drive unit, and the fourth terminal of the enable control unit is used to connect to the first power supply voltage.

[0012] As one possible implementation, the above-mentioned enabling control unit includes: a seventh resistor and a seventh optocoupler; One end of the seventh resistor is used to connect to the enable control signal. The first end of the seventh optocoupler is grounded. The other end of the seventh resistor is connected to the second end of the seventh optocoupler. The third end of the seventh optocoupler is used to connect to the enable signal. The third end of the seventh optocoupler is also connected to the enable terminals of the block array, the row drive unit, and the column drive unit. The fourth end of the seventh optocoupler is also used to connect to the first power supply voltage.

[0013] As one possible implementation, the control module also includes a power supply unit; The first output terminal of the power supply unit is connected to the second input terminal of the row driving unit and the second input terminal of the column driving unit, respectively, and the second output terminal of the power supply unit is connected to the third input terminal of the row driving unit and the third input terminal of the column driving unit, respectively.

[0014] As one possible implementation, the power supply unit includes: a diode, a fuse, a varistor, a power conversion chip, and a capacitor; The input terminal of the diode is connected to an external power supply, the output terminal of the diode is connected to one end of a fuse, the other end of the fuse is connected to the input terminal of the power conversion chip and one end of a varistor, and the other end of the varistor is grounded. The input terminal of the power conversion chip is also connected to the third input terminal of the row driving unit and the third input terminal of the column driving unit. The output terminal of the power conversion chip is connected to one end of the capacitor, the second input terminal of the row driving unit, and the second input terminal of the column driving unit, respectively. The ground terminal of the power conversion chip and the other end of the capacitor are both grounded.

[0015] A second aspect of this application provides an electronic device in which a relay matrix printed circuit board as described in the first aspect is deployed.

[0016] The beneficial effects of the embodiments of this application include: This application provides a relay matrix printed circuit board, which forms a test device for a frame circuit breaker by means of a control module, multiple relay matrices, multiple external terminals, and drive modules corresponding to each relay matrix. The control module sets the row control signals and column control signals of each relay matrix through a built-in software algorithm, and outputs row control signals to each drive module through a first output terminal and column control signals to each drive module through a second output terminal. Each drive module responds to the row control signals and applies row drive signals to each row interface of the corresponding relay matrix, and each drive module responds to the column control signals and applies column drive signals to each column interface of the corresponding relay matrix. The relay matrix drives the operation of each relay under the action of the row drive signals and column drive signals output by the corresponding drive modules to provide test terminals for the secondary terminals of the frame circuit breaker. The test device is connected through the normally open contacts of each relay in the relay matrix to complete the testing of the resistance and power parameters of any secondary terminal of the frame circuit breaker. The relay matrix has a symmetrical structure. The normally closed contact of the first relay and at least one normally closed contact of the second relay share an external terminal. The first relay and each of the second relays are located in different relay matrices, but the position of the first relay in the relay matrix corresponds to the position of each of the second relays in the relay matrix. In this way, it is possible to flexibly test the continuity, resistance parameters, and power parameters between any two terminals without being restricted by the circuit breaker wiring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This application provides a schematic diagram of the structure of a relay matrix printed circuit board. Figure 2 This is a schematic diagram of the structure of a first relay matrix provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a second relay matrix provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a testing device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a driving module corresponding to a first relay matrix provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a driving module corresponding to a second relay matrix provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a control module provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of an external terminal provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a power supply unit provided in an embodiment of this application.

[0019] Reference numerals: 10: Relay matrix printed circuit board; 101: Control module; 1011: Power supply unit; 111: Diode; 112: Fuse; 113: Varistor; 114: Power conversion chip; 115: Capacitor; 102: Drive module; 1021: Row drive unit; 211: First filter module; 2111: First resistor; 2112: Second resistor; 2113: Third resistor; 212: First opto-isolation module; 2121: First optocoupler; 2122: Second optocoupler; 2123: Third optocoupler; 213: First decoder; 214: First drive chip; 1022: Column drive. 221: Second filter module; 2211: Fourth resistor; 2212: Fifth resistor; 2213: Sixth resistor; 222: Second opto-isolation module; 2221: Fourth optocoupler; 2222: Fifth optocoupler; 2223: Sixth optocoupler; 223: Second decoder; 224: Second driver chip; 1023: Resistor array; 1024: Enable control unit; 241: Seventh resistor; 242: Seventh optocoupler; 103: Relay matrix; 1031: First relay matrix; 311: First relay; 1032: Second relay matrix; 321: Second relay; 104: External terminal. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The modules of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Currently, the electrical parameter testing of frame circuit breakers is often carried out manually by installing fixtures one by one. Frame circuit breakers have 32-64 connection points on their secondary terminals, and the attributes of customer-customized frame circuit breakers vary, resulting in numerous and complex definitions of these connection points. Therefore, this testing method not only requires a large amount of manpower but also suffers from low testing efficiency, low accuracy, and a high risk factor. Furthermore, to improve the efficiency and safety of frame circuit breaker measurements, existing technologies often use relay matrices to test the electrical parameters of frame circuit breakers. However, this method can only measure the resistance of the frame circuit breaker and cannot measure power signals such as current and voltage.

[0025] To address this, this application provides a relay matrix printed circuit board (PCB). The PCB integrates a control module, multiple external terminals, multiple relay matrices, and multiple drive modules corresponding to each relay matrix. The control module controls each drive module to output row and column drive signals. Each relay matrix operates under the influence of the row and column drive signals output by its corresponding drive module. The testing equipment tests the resistance and power parameters of the frame circuit breaker via each relay matrix. Furthermore, the relay matrices are symmetrically structured, with at least two relay matrices sharing a single external terminal at corresponding positions. The PCB connects to the secondary terminals of the frame circuit breaker via these external terminals and is selectively connected to the testing equipment via a contact of each relay. This allows for flexible testing of continuity, resistance, and power parameters between any two terminals, without being limited by the circuit breaker wiring.

[0026] It is worth noting that the relay matrix printed circuit board is used to flexibly test the secondary terminals of the frame circuit breaker. As part of the test equipment, the relay matrix printed circuit board is used to simulate or connect various test signals, and to test various electrical parameters of the secondary terminals of the frame circuit breaker by controlling the on and off paths.

[0027] The relay matrix printed circuit board provided in the embodiments of this application will be explained in detail below with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of a relay matrix printed circuit board provided in this application is shown below. Figure 1 This application provides a relay matrix printed circuit board 10 including: a control module 101, multiple drive modules 102, multiple relay matrices 103 and multiple external terminals 104, each relay matrix 103 including: multiple relays.

[0029] The first output terminal of the control module 101 is connected to the first input terminal of each drive module 102, the second output terminal of the control module 101 is connected to the second input terminal of each drive module 102, the first output terminal of each drive module 102 is connected to the row interface of the corresponding relay matrix 103, the second output terminal of the drive module 102 is connected to the column interface of the corresponding relay matrix 103, the row interface of each relay matrix 103 is connected to the input terminal of each relay in the row, and the column interface of each relay matrix 103 is connected to the output terminal of each relay in the column.

[0030] Optionally, the control module 101 can be implemented by a field-programmable gate array (FPGA), a microcontroller unit (MCU), or a digital signal processor (DSP). This application does not make any specific limitations on this.

[0031] Optionally, the control module 101 controls the row drive signals and column drive signals of each drive module 102 via a built-in software algorithm. The first output terminal of the control module 101 is connected to the first input terminal of each drive module 102, and the second output terminal of the control module 101 is connected to the second input terminal of each drive module 102. That is, the control module 101 sends row control signals to each drive module 102 via the first output terminal and sends column control signals to each drive module 102 via the second output terminal.

[0032] Furthermore, each first output terminal of the drive module 102 is connected to each row interface of the corresponding relay matrix 103, and each second output terminal of the drive module 102 is connected to each column interface of the corresponding relay matrix 103. The drive module 102 generates a corresponding row drive signal in response to the row control signal, and applies the converted row drive signal to the row interface of the corresponding relay matrix through each first output terminal. At the same time, the drive module 102 generates a corresponding column drive signal in response to the column control signal, and applies the converted column drive signal to the column interface of the corresponding relay matrix through each second output terminal.

[0033] Optionally, each relay matrix 103 is a matrix composed of multiple relays. Each relay matrix 103 divides the multiple relays into a row and column structure. The row interface of each relay matrix 103 is connected to the input terminal of each relay in the row, and the column interface of each relay matrix 103 is connected to the output terminal of each relay in the column. That is, each relay in each relay matrix 103 receives the drive signal through the row interface of its row. Under the action of the drive signal, the relay drives the armature to move to switch the contacts.

[0034] The first relay 311 includes a first contact and a second contact. The first contact is externally connected to a test device. The second contact shares an external terminal 104 with the second contacts of at least one second relay 321 and is connected to the secondary terminal of the frame circuit breaker via the external terminal. The first relay 311 and each of the second relays 321 are located in different relay matrices 103, and the position of the first relay 311 in the relay matrix 103 corresponds to the position of the second relay 321 in the relay matrix 103.

[0035] Optionally, the first relay 311 includes a first contact and a second contact. The first contact is the normally open contact of the first relay 311, and the second contact is the normally closed contact of the first relay 311. Each relay in each relay matrix 103 is connected to the test equipment via the normally open contact. The second contact of each relay in each relay matrix 103 is connected to an external terminal, and the second contacts of the relays at corresponding positions in each relay matrix share a common external terminal, which is connected to the frame circuit breaker to be tested via the external terminal.

[0036] It is worth noting that at least two relays share a single external terminal, and the relays sharing the same external terminal are placed in different relay matrices, with corresponding positions of the relays sharing the same external terminal within the relay matrices.

[0037] Furthermore, since the relay matrix printed circuit board provided in this application embodiment has a dual-path wiring structure, the relay matrices often appear in pairs, such as two relay matrices, four relay matrices, six relay matrices, etc.

[0038] It should also be noted that the first relay 311 can be any relay matrix in the relay matrix printed circuit board 10, and the second relay 321 refers to the relay at the corresponding position in another relay matrix outside the relay matrix where the first relay 311 is located. For example, if the relay matrix printed circuit board includes relay matrix A and relay matrix B, and relay a11 in the first row and first column of relay matrix A is the first relay, then relay b11 in the first row and first column of relay matrix B is the second relay, and relay matrix A and relay matrix B are symmetrical relay matrices.

[0039] In one alternative implementation, see [link to implementation details]. Figure 2 This application provides a first relay matrix 1031 consisting of 64 relays arranged in an 8-row, 8-column configuration. The first relay matrix 1031 receives 8 row drive signals (AH1, AH2, AH3, AH4, AH5, AH6, AH7, and AH8) via a corresponding drive module, each driving one row of first relays 311. The first relay matrix 1031 also receives 8 column drive signals (AV1, AV2, AV3, AV4, AV5, AV6, AV7, and AV8) via a corresponding drive module, each driving one column of first relays 311. Under the influence of the row and column drive signals output by the corresponding drive module, the first relay matrix 1031 selects relay paths to provide electrical parameter testing for the secondary terminals of the frame circuit breaker.

[0040] In one alternative implementation, see [link to implementation details]. Figure 3This application provides a second relay matrix 1032, which is also an 8-row, 8-column relay matrix composed of 64 relays. The second relay matrix 1032 receives 8 row drive signals (BH1, BH2, BH3, BH4, BH5, BH6, BH7, and BH8) via a corresponding drive module, each row drive signal driving one row of second relays 321. The second relay matrix 1032 also receives 8 column drive signals (BV1, BV2, BV3, BV4, BV5, BV6, BV7, and BV8) via a corresponding drive module, each column drive signal driving one column of second relays 321. Under the action of the row and column drive signals output by the corresponding drive module, the second relay matrix 1032 selects the relay path to provide electrical parameter testing for the secondary terminals of the frame circuit breaker.

[0041] In summary, the normally closed contact of the first relay 311 in the first row and first column of the first relay matrix 1031 shares the first external terminal with the normally closed contact of the second relay 321 in the first row and first column of the second relay matrix 1032. The normally closed contact of the first relay 311 in the first row and second column of the first relay matrix 1031 shares the second external terminal with the normally closed contact of the second relay 321 in the first row and second column of the second relay matrix 1032. And so on, the normally closed contact of the first relay 311 in the eighth row and eighth column of the first relay matrix 1031 shares the 64th external terminal with the normally closed contact of the second relay 321 in the eighth row and eighth column of the second relay matrix 1032. Through these 64 external terminals, the electrical parameter information between any two secondary terminals of the frame circuit breaker can be tested.

[0042] It is worth noting that this application uses the deployment of two 8×8 relay matrices 103 on the relay matrix printed circuit board 10 as an example for illustration, but it does not mean that the relay matrix printed circuit board 10 can only deploy two relay matrices 103, nor does it mean that the relay matrix 103 can only be a matrix composed of 64 relays. This application does not make any specific limitations in this regard.

[0043] In one alternative implementation, see [link to implementation details]. Figure 4 The test equipment provided in this application includes a terminal block. The normally open contacts of each first relay 311 in the first relay matrix 1031 and the normally open contacts of each second relay 321 in the second relay matrix 1032 are connected to the test equipment via the terminal block. The test equipment is used to provide test signals for the test paths selected by each relay in the relay matrix 103 to complete the test of the secondary terminals of the frame circuit breaker.

[0044] Under the control of the control module 101, each drive module 102 drives the operation of each row and column relay in the corresponding relay matrix 103. The test equipment tests the resistance and power parameters of the frame circuit breaker via the relay matrix 103.

[0045] Optionally, the control module 101 controls the drive module 102 under the action of the built-in software algorithm, so that the drive module 102 drives the operation of each relay in the corresponding relay matrix 103. The relay matrix printed circuit board 10 is connected to the secondary terminals of the frame circuit breaker via external terminals to complete the testing of the resistance and power parameters of any secondary terminal of the frame circuit breaker. Here, the resistance parameter refers to the resistance of the frame circuit breaker, and the power parameter refers to the voltage and current between any two secondary terminals of the frame circuit breaker.

[0046] In this embodiment, a test device for a frame circuit breaker is constructed using a control module, multiple relay matrices, multiple external terminals, and drive modules corresponding to each relay matrix. The control module sets the row control signals and column control signals of each relay matrix via a built-in software algorithm, and outputs row control signals to each drive module via a first output terminal and column control signals to each drive module via a second output terminal. Each drive module responds to the row control signals by applying row drive signals to each row interface of its corresponding relay matrix, and each drive module responds to the column control signals by applying column drive signals to each column interface of its corresponding relay matrix. Under the action of the row drive signals and column drive signals output by the corresponding drive modules, the relay matrices drive the operation of each relay to provide test terminals for the secondary terminals of the frame circuit breaker. The test device is connected via the normally open contacts of each relay in the relay matrix to complete the testing of the resistance and power parameters of any secondary terminal of the frame circuit breaker. The relay matrix has a symmetrical structure. The normally closed contact of the first relay and at least one normally closed contact of the second relay share an external terminal. The first relay and each of the second relays are located in different relay matrices, but the position of the first relay in the relay matrix corresponds to the position of each of the second relays in the relay matrix. In this way, it is possible to flexibly test the continuity, resistance parameters, and power parameters between any two terminals without being restricted by the circuit breaker wiring.

[0047] It is worth noting that the embodiments provided in this application Figure 5 for Figure 2 The drive module 102 corresponding to the first relay matrix 1031 shown in the embodiment of this application is provided. Figure 6 for Figure 3The second relay matrix 1032 shown corresponds to the drive module 102. The first relay matrix 1031 and the second relay matrix 1032 are symmetrical relay matrices. The drive module 102 corresponding to the first relay matrix 1031 and the second relay matrix 1032 is also symmetrical.

[0048] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6 The relay matrix printed circuit board 10 provided in this application embodiment includes multiple driving modules 102, each including a row driving unit 1021 and a column driving unit 1022. Both the row driving unit 1021 and the column driving unit 1022 include multiple first output terminals.

[0049] The first input terminal of the row drive unit 1021 is connected to the first output terminal of the control module 101, and each first output terminal of the row drive unit 1021 is connected to each row interface of the corresponding relay matrix 103.

[0050] Optionally, the row drive unit 1021 receives the row control signal sent by the control module 101 via the first input terminal, and converts the row control signal into multiple row drive signals via the internal circuit, and transmits them to the corresponding row interfaces of the relay matrix 103 via each first output terminal.

[0051] The first input terminal of the column drive unit 1022 is connected to the second output terminal of the control module 101, and each first output terminal of the column drive unit 1022 is connected to the column interface of the corresponding relay matrix 103.

[0052] Optionally, the column drive unit 1022 receives the column control signal sent by the control module 101 via the first input terminal, and converts the column control signal into multiple column drive signals via the internal circuit, and transmits them to the corresponding column interfaces of the relay matrix 103 via each first output terminal.

[0053] The second input terminal of the row driving unit 1021 and the second input terminal of the column driving unit 1022 are both used to connect to the first power supply voltage. The third input terminal of the row driving unit 1021 and the third input terminal of the column driving unit 1022 are both used to connect to the second power supply voltage. The second output terminal of the row driving unit 1021 and the second output terminal of the column driving unit 1022 are both grounded.

[0054] Optionally, both the first power supply voltage and the second power supply voltage can be provided by an external power supply or by the control module 101. The first power supply voltage can be 5V and the second power supply voltage can be 24V. This application does not make any specific limitations on this.

[0055] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6The row driving unit 1021 in each driving module 102 of the relay matrix printed circuit board 10 provided in this application embodiment includes: a first filter module 211, a first opto-isolation module 212, a first decoder 213 and a first driving chip 214. The first driving chip 214 includes: multiple output terminals.

[0056] One end of the first filter module 211 is connected to the first output terminal of the control module 101. The first end of the first opto-isolation module 212 is grounded. The other end of the first filter module 211 is connected to the second end of the first opto-isolation module 212. The fourth end of the first opto-isolation module 212 is connected to the first power supply voltage. The third end of the first opto-isolation module 212 is connected to the input terminal of the first decoder 213. The power supply terminal of the first decoder 213 is connected to the first power supply voltage. The enable terminal of the first decoder 213 is used to receive an enable signal. The output terminal of the first decoder 213 is connected to the input terminal of the first driver chip 214. The power supply terminal of the first driver chip 214 is connected to the second power supply voltage. Each output terminal of the first driver chip 214 is connected to each row interface of the corresponding relay matrix 103. The grounding terminal of the first driver chip 214 and the grounding terminal of the first decoder 213 are both grounded.

[0057] Optionally, the first filter module 211 is used to filter out interference signals in the row control signals provided by the control module 101, the first opto-isolation module 212 is used to achieve electrical isolation between the front-end control module 101 and the back-end drive circuit, the first decoder 213 is used to translate the multiple row control signals input by the control module 101 into multiple row drive signals, and the first drive chip 214 responds to the row drive signals and applies the row drive signals to each row interface of the corresponding relay matrix 103. In this way, the test accuracy and test stability of the relay matrix printed circuit board 10 can be improved.

[0058] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6 The first filter module 211 in the row drive unit 1021 of the relay matrix printed circuit board 10 provided in this application embodiment includes: a first resistor 2111, a second resistor 2112 and a third resistor 2113; the first opto-isolation module 212 in the row drive unit 1021 includes: a first optocoupler 2121, a second optocoupler 2122 and a third optocoupler 2123; and the first decoder 213 includes: multiple input terminals.

[0059] One end of the first resistor 2111, one end of the second resistor 2112, and one end of the third resistor 2113 are all connected to the first output terminal of the control module 101, and the first end of the first optocoupler 2121, the first end of the second optocoupler 2122, and the first end of the third optocoupler 2123 are all grounded. The other end of the first resistor 2111 is connected to the second end of the first optocoupler 2121, the other end of the second resistor 2112 is connected to the second end of the second optocoupler 2122, the other end of the third resistor 2113 is connected to the second end of the third optocoupler 2123, and the third ends of the first optocoupler 2121, the second optocoupler 2122, and the third optocoupler 2123 are respectively connected to the respective input ends of the first decoder 213. The fourth terminal of the first optocoupler 2121, the fourth terminal of the second optocoupler 2122, and the fourth terminal of the third optocoupler 2123 are all used to connect to the first power supply voltage. The first decoder 213 is used to decode the optocoupler signals output by the first optocoupler 2121, the second optocoupler 2122 and the third optocoupler 2123 into the corresponding row drive signals of the relay matrix 103 under the action of the enable signal.

[0060] Optionally, the resistance values ​​of the first resistor 2111, the second resistor 2112, and the third resistor 2113 are preferably 3.9kΩ, but other resistance values ​​are also possible. This application does not specifically limit the value of these values.

[0061] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6 The column driving unit 1022 in each driving module 102 of the relay matrix printed circuit board 10 provided in this application embodiment includes: a second filter module 221, a second opto-isolation module 222, a second decoder 223 and a second driving chip 224. The second driving chip 224 includes: multiple output terminals.

[0062] One end of the second filter module 221 is connected to the second output terminal of the control module 101. The first end of the second opto-isolation module 222 is grounded. The other end of the second filter module 221 is connected to the second end of the second opto-isolation module 222. The fourth end of the second opto-isolation module 222 is connected to the first power supply voltage. The third end of the second opto-isolation module 222 is connected to the input terminal of the second decoder 223. The power supply terminal of the second decoder 223 is connected to the first power supply voltage. The enable terminal of the second decoder 223 is used to receive an enable signal. The output terminal of the second decoder 223 is connected to the input terminal of the second driver chip 224. The power supply terminal of the second driver chip 224 is connected to the second power supply voltage. Each output terminal of the second driver chip 224 is connected to each column interface of the corresponding relay matrix 103. The grounding terminals of the second driver chip 224 and the second decoder 223 are both grounded.

[0063] Optionally, the second filter module 221 is used to filter out interference signals in the column control signals provided by the control module 101, the second opto-isolation module 222 is used to achieve electrical isolation between the front-end control module 101 and the back-end drive circuit, the second decoder 223 is used to translate the multi-channel column control signals input by the control module 101 into multi-channel column drive signals, and the second drive chip 224 responds to the column drive signals and applies the column drive signals to the corresponding column interfaces of the relay matrix 103. In this way, the test accuracy and test stability of the relay matrix printed circuit board 10 can be improved.

[0064] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6 The second filter module 221 in the column drive unit 1022 of the relay matrix printed circuit board 10 provided in this application embodiment includes: a fourth resistor 2211, a fifth resistor 2212 and a sixth resistor 2213; the second opto-isolation module 222 in the column drive unit 1022 includes: a fourth optocoupler 2221, a fifth optocoupler 2222 and a sixth optocoupler 2223; and the second decoder 223 includes: multiple input terminals.

[0065] One end of the fourth resistor 2211, one end of the fifth resistor 2212, and one end of the sixth resistor 2213 are all connected to the second output terminal of the control module 101, and the first end of the fourth optocoupler 2221, the first end of the fifth optocoupler 2222, and the first end of the sixth optocoupler 2223 are all grounded. The other end of the fourth resistor 2211 is connected to the second end of the fourth optocoupler 2221, the other end of the fifth resistor 2212 is connected to the second end of the fifth optocoupler 2222, the other end of the sixth resistor 2213 is connected to the second end of the sixth optocoupler 2223, and the third ends of the fourth optocoupler 2221, the fifth optocoupler 2222, and the sixth optocoupler 2223 are respectively connected to the respective input ends of the second decoder 223. The fourth terminal of the fourth optocoupler 2221, the fourth terminal of the fifth optocoupler 2222, and the fourth terminal of the sixth optocoupler 2223 are all used to connect to the first power supply voltage. The second decoder 223 is used to translate the optocoupler signals output by the fourth optocoupler 2221, the fifth optocoupler 2222, and the sixth optocoupler 2223 into the corresponding column drive signals of the relay matrix 103 under the action of the enable signal.

[0066] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6The drive module 102 in the relay matrix printed circuit board 10 provided in this application embodiment further includes: a block 1023 and an enable control unit 1024.

[0067] The block array 1023 is connected to the row drive unit 1021 and the column drive unit 1022 respectively.

[0068] Optionally, the resistor array 1023 can be formed by cascading multiple resistors. The resistor array 1023 can provide pull-down resistors for the drive module 102 to ensure the safety of the frame circuit breaker test.

[0069] The first terminal of the enable control unit 1024 is grounded, the second terminal of the enable control unit 1024 is used to receive the enable control signal, the third terminal of the enable control unit 1024 is used to receive the enable signal, the third terminal of the enable control unit 1024 is also connected to the enable terminal of the block 1023, the row drive unit 1021 and the column drive unit 1022, and the fourth terminal of the enable control unit 1024 is used to receive the first power supply voltage.

[0070] Optionally, the enable control unit 1024 controls the validity of the enable signal EN under the action of the enable control signal ENCTL, so as to drive the first decoder 213 and the second decoder 223 to decode the row control signal and column control signal output by the control module 101.

[0071] In one alternative implementation, see [link to implementation details]. Figure 5 and Figure 6 The embodiment of this application provides that the enable control unit 1024 in each drive module 102 of the relay matrix printed circuit board 10 includes: a seventh resistor 241 and a seventh optocoupler 242.

[0072] One end of the seventh resistor 241 is used to connect to the enable control signal. The first end of the seventh optocoupler 242 is grounded. The other end of the seventh resistor 241 is connected to the second end of the seventh optocoupler 242. The third end of the seventh optocoupler 242 is used to connect to the enable signal. The third end of the seventh optocoupler 242 is also connected to the enable terminals of the block 1023, the row drive unit 1021, and the column drive unit 1022. The fourth end of the seventh optocoupler 242 is also used to connect to the first power supply voltage.

[0073] Optionally, the seventh resistor 241 is used to filter the enable control signal, and the seventh optocoupler 242 is used to achieve electrical isolation between the front-end circuit and the back-end circuit to prevent the back-end circuit from being interfered with by the front-end circuit.

[0074] Optionally, see Figure 2 , Figure 3 , Figure 5 and Figure 6As can be seen, the relay matrix printed circuit board 10 provided in this application embodiment uses 128 relays to control two 8×8 relay matrices. The control module only needs to provide 12 output points to control the on / off state of 128 relays. The 64 secondary terminals of the frame circuit breaker can be connected to any two external terminals to connect to the test equipment to realize the testing of resistance parameters and power parameters.

[0075] It is worth noting that, to ensure testing accuracy, the main circuit of the relay matrix printed circuit board 10 needs to withstand a voltage of 800V, and the preferred dimensions of the relay matrix printed circuit board 10 are 108mm × 430mm. Furthermore, the relay matrix printed circuit board 10 achieves strong and weak current isolation via an opto-isolation module, and each circuit of the relay matrix printed circuit board 10 needs to meet the requirement of 30A and 15 seconds of power-on heating to maintain stable operation.

[0076] Furthermore, the switching time of each relay in each relay matrix 103 on the relay matrix printed circuit board 10 is less than 80ms, which can improve the testing speed of the relay matrix printed circuit board 10. In addition, the dual wiring of the relay matrix printed circuit board 10 allows the relay matrix printed circuit board 10 to be flexibly expanded into 2×64, 4×64, and 6×64 matrix boards.

[0077] It should also be noted that the relay matrix printed circuit board 10 preferentially selects external terminals that provide test points for the frame circuit breaker. The resistance and power parameters of the secondary terminals of the frame circuit breaker are tested through the external terminals. After the test is completed, all relays are disconnected and the test path is reselected to test the resistance and power parameters of other secondary terminals.

[0078] Optionally, the rated current of each relay in the relay matrix can be 5A. When used with an external contactor, the relays on the printed circuit board of the relay matrix only perform circuit selection and do not interrupt the current, which can greatly extend the service life of the relays. The relays with the highest frequency of use can achieve 4 million opening and closing cycles. This application does not make specific limitations on this.

[0079] In addition, the relay matrix printed circuit board provided in this application embodiment, together with the software, can realize a self-test function, which can lock abnormal relays to a certain column, thereby reducing the difficulty of maintenance.

[0080] Figure 7 A schematic diagram of the structure of a control module provided in this application is shown below. Figure 7The control module 101 provided in this application embodiment is implemented by an external logic controller PLC. The external logic controller PLC has multiple ports for outputting row control signals AHD0, AHD1, AHD2, BHD0, BHD1 and BHD2, column control signals AVD0, AVD1, AVD2, BVD0, BVD1 and BVD2, and enable control signals.

[0081] Figure 8 For a structural schematic diagram of an external terminal provided in this application, see [link to schematic diagram]. Figure 8 The external terminals 104 provided in this application embodiment can be integrated on the same chip, or they can be integrated on a separate chip for each row. This application does not make any specific limitation in this regard.

[0082] In one alternative implementation, see [link to implementation details]. Figure 9 The control module 101 in the relay matrix printed circuit board 10 provided in this application embodiment further includes a power supply unit 1011.

[0083] The first output terminal of the power supply unit 1011 is connected to the second input terminal of the row driving unit 1021 and the second input terminal of the column driving unit 1022, respectively. The second output terminal of the power supply unit 1011 is connected to the third input terminal of the row driving unit 1021 and the third input terminal of the column driving unit 1022, respectively.

[0084] In one alternative implementation, see [link to implementation details]. Figure 9 The power supply unit 1011 in the relay matrix printed circuit board 10 provided in this application embodiment includes: diode 111, fuse 112, varistor 113, power conversion chip 114 and capacitor 115.

[0085] The input terminal of diode 111 is connected to an external power supply, the output terminal of diode 111 is connected to one end of fuse 112, the other end of fuse 112 is connected to the input terminal of power conversion chip 114 and one end of varistor 113, and the other end of varistor 113 is grounded. The input terminal of the power conversion chip 114 is also connected to the third input terminal of the row driving unit 1021 and the third input terminal of the column driving unit 1022. The output terminal of the power conversion chip 114 is connected to one end of the capacitor 115, the second input terminal of the row driving unit 1021 and the second input terminal of the column driving unit 1022, respectively. The ground terminal of the power conversion chip 114 and the other end of the capacitor 115 are both grounded.

[0086] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A relay matrix printed circuit board, characterized in that, The relay matrix printed circuit board includes: a control module, multiple drive modules, multiple relay matrices, and multiple external terminals. Each relay matrix includes: multiple relays. The first output terminal of the control module is connected to the first input terminal of each of the drive modules, the second output terminal of the control module is connected to the second input terminal of each of the drive modules, the first output terminal of each drive module is connected to the row interface of the corresponding relay matrix, the second output terminal of the drive module is connected to the column interface of the corresponding relay matrix, the row interface of each relay matrix is ​​connected to the input terminal of each relay in the row, and the column interface of each relay matrix is ​​connected to the output terminal of each relay in the column. The first relay includes a first contact and a second contact. The first contact is externally connected to a test device. The second contact shares an external terminal with the second contact of at least one second relay and is connected to the secondary terminal of the frame circuit breaker via the external terminal. The first relay and each of the second relays are located in different relay matrices, and the position of the first relay in the relay matrix corresponds to the position of the second relay in the relay matrix. Under the control of the control module, each drive module drives the operation of the corresponding row and column relays in the relay matrix, and the test equipment tests the resistance and power parameters of the frame circuit breaker via the relay matrix.

2. The relay matrix printed circuit board according to claim 1, characterized in that, Each of the plurality of driving modules includes: a row driving unit and a column driving unit, and each of the row driving unit and the column driving unit includes: a plurality of first output terminals; The first input terminal of the row driving unit is connected to the first output terminal of the control module, and each first output terminal of the row driving unit is connected to each row interface of the corresponding relay matrix. The first input terminal of the column driving unit is connected to the second output terminal of the control module, and each first output terminal of the column driving unit is connected to each column interface of the corresponding relay matrix. The second input terminal of the row driving unit and the second input terminal of the column driving unit are both used to connect to the first power supply voltage. The third input terminal of the row driving unit and the third input terminal of the column driving unit are both used to connect to the second power supply voltage. The second output terminal of the row driving unit and the second output terminal of the column driving unit are both grounded.

3. The relay matrix printed circuit board according to claim 2, characterized in that, The row driving unit includes: a first filter module, a first opto-isolation module, a first decoder, and a first driving chip, wherein the first driving chip includes: multiple output terminals; One end of the first filter module is connected to the first output terminal of the control module. The first terminal of the first opto-isolation module is grounded. The other end of the first filter module is connected to the second terminal of the first opto-isolation module. The fourth terminal of the first opto-isolation module is connected to the first power supply voltage. The third terminal of the first opto-isolation module is connected to the input terminal of the first decoder. The power supply terminal of the first decoder is connected to the first power supply voltage. The enable terminal of the first decoder is used to receive an enable signal. The output terminal of the first decoder is connected to the input terminal of the first driver chip. The power supply terminal of the first driver chip is connected to the second power supply voltage. Each output terminal of the first driver chip is connected to the corresponding row interface of the relay matrix. The ground terminal of the first driver chip and the ground terminal of the first decoder are both grounded.

4. The relay matrix printed circuit board according to claim 3, characterized in that, The first filter module includes a first resistor, a second resistor, and a third resistor; the first opto-isolation module includes a first optocoupler, a second optocoupler, and a third optocoupler; and the first decoder includes multiple input terminals. One end of the first resistor, one end of the second resistor, and one end of the third resistor are all connected to the first output terminal of the control module, and the first ends of the first optocoupler, the second optocoupler, and the third optocoupler are all grounded. The other end of the first resistor is connected to the second end of the first optocoupler, the other end of the second resistor is connected to the second end of the second optocoupler, the other end of the third resistor is connected to the second end of the third optocoupler, and the third end of the first optocoupler, the third end of the second optocoupler, and the third end of the third optocoupler are respectively connected to each input end of the first decoder; The fourth terminal of the first optocoupler, the fourth terminal of the second optocoupler, and the fourth terminal of the third optocoupler are all used to connect to the first power supply voltage; The first decoder is used to translate the optocoupler signals output by the first optocoupler, the second optocoupler and the third optocoupler into the corresponding row drive signals of the relay matrix under the action of the enable signal.

5. The relay matrix printed circuit board according to claim 2, characterized in that, The column driving unit includes: a second filter module, a second opto-isolation module, a second decoder, and a second driving chip, wherein the second driving chip includes: multiple output terminals; One end of the second filter module is connected to the second output terminal of the control module. The first end of the second opto-isolation module is grounded. The other end of the second filter module is connected to the second end of the second opto-isolation module. The fourth end of the second opto-isolation module is connected to the first power supply voltage. The third end of the second opto-isolation module is connected to the input terminal of the second decoder. The power supply terminal of the second decoder is connected to the first power supply voltage. The enable terminal of the second decoder is used to receive an enable signal. The output terminal of the second decoder is connected to the input terminal of the second driver chip. The power supply terminal of the second driver chip is connected to the second power supply voltage. Each output terminal of the second driver chip is connected to each column interface of the corresponding relay matrix. The ground terminal of the second driver chip and the ground terminal of the second decoder are both grounded.

6. The relay matrix printed circuit board according to claim 5, characterized in that, The second filter module includes a fourth resistor, a fifth resistor, and a sixth resistor; the second opto-isolation module includes a fourth optocoupler, a fifth optocoupler, and a sixth optocoupler; and the second decoder includes multiple input terminals. One end of the fourth resistor, one end of the fifth resistor, and one end of the sixth resistor are all connected to the second output terminal of the control module, and the first ends of the fourth optocoupler, the fifth optocoupler, and the sixth optocoupler are all grounded. The other end of the fourth resistor is connected to the second end of the fourth optocoupler, the other end of the fifth resistor is connected to the second end of the fifth optocoupler, the other end of the sixth resistor is connected to the second end of the sixth optocoupler, and the third ends of the fourth optocoupler, the fifth optocoupler, and the sixth optocoupler are respectively connected to each input end of the second decoder. The fourth terminal of the fourth optocoupler, the fourth terminal of the fifth optocoupler, and the fourth terminal of the sixth optocoupler are all used to connect to the first power supply voltage; The second decoder is used to translate the optocoupler signals output by the fourth optocoupler, the fifth optocoupler and the sixth optocoupler into column drive signals of the corresponding relay matrix under the action of the enable signal.

7. The relay matrix printed circuit board according to claim 2, characterized in that, The drive module further includes: a block array and an enable control unit; The block array is connected to both the row drive unit and the column drive unit. The first terminal of the enable control unit is grounded, the second terminal of the enable control unit is used to receive an enable control signal, the third terminal of the enable control unit is used to receive an enable signal, the third terminal of the enable control unit is also connected to the enable terminal of the block, the row drive unit and the column drive unit, and the fourth terminal of the enable control unit is used to receive a first power supply voltage.

8. The relay matrix printed circuit board according to claim 7, characterized in that, The enabling control unit includes: a seventh resistor and a seventh optocoupler; One end of the seventh resistor is used to connect to an enable control signal. The first end of the seventh optocoupler is grounded. The other end of the seventh resistor is connected to the second end of the seventh optocoupler. The third end of the seventh optocoupler is used to connect to an enable signal. The third end of the seventh optocoupler is also connected to the enable terminal of the block array, the row drive unit, and the column drive unit. The fourth end of the seventh optocoupler is also used to connect to a first power supply voltage.

9. The relay matrix printed circuit board according to claim 2, characterized in that, The control module also includes: a power supply unit; The first output terminal of the power supply unit is connected to the second input terminal of the row driving unit and the second input terminal of the column driving unit, respectively, and the second output terminal of the power supply unit is connected to the third input terminal of the row driving unit and the third input terminal of the column driving unit, respectively.

10. The relay matrix printed circuit board according to claim 9, characterized in that, The power supply unit includes: diodes, fuses, varistors, power conversion chips, and capacitors; The input terminal of the diode is connected to an external power supply, the output terminal of the diode is connected to one end of the fuse, the other end of the fuse is connected to the input terminal of the power conversion chip and one end of the varistor, and the other end of the varistor is grounded. The input terminal of the power conversion chip is also connected to the third input terminal of the row driving unit and the third input terminal of the column driving unit. The output terminal of the power conversion chip is connected to one end of the capacitor, the second input terminal of the row driving unit and the second input terminal of the column driving unit, respectively. The ground terminal of the power conversion chip and the other end of the capacitor are both grounded.

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