Resistance plate capable of programmably adjusting resistance value

Abstract

The invention discloses a programmable resistance value adjusting resistance plate which comprises a programmable resistance plate provided with a signal terminal. The programmable resistance value adjusting resistance board is further provided with a digital quantity output board card, and the programmable resistance board is connected with the digital quantity output board card through a programming control cable. And an output resistance signal of the programmable resistance plate is connected to the signal terminal. By adopting the technical scheme, the number of channels is freely configured, the application is flexible, the wiring is simple, the cost performance is high, the service life is long, the stability is high, and the device is particularly suitable for a resistance type analog signal input test during ECU automatic test; through the use of the resistance adjusting mechanism and the resistance adjusting marshalling switching mechanism, independence or combination among channels can be freely configured according to the requirement for the number of tested channels, the resistance range and the precision requirement, multiple modes of signals of each channel can also be preset, and therefore wiring is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic testing of electrical systems. More specifically, the present invention relates to a resistor plate with programmable adjustable resistance. Background Art

[0002] The automotive electronic control unit (ECU) is the control core of automotive electronics. As the most important and basic test content of ECU testing, I / O testing requires the test equipment to provide corresponding digital and analog signals for testing. As one of the types of analog signals, resistive analog signals are used to test resistive product functions such as accelerator pedal signals. The equipment injects the corresponding required resistance value into the product's resistive input type function pin to test the quality of the function.

[0003] Currently, mainstream programmable resistor boards at home and abroad generally have problems such as high prices, low flexibility in application configuration such as channel settings, and redundant resistance range and accuracy.

[0004] Using keywords such as "resistance board; test; adjustment; programmable" to search existing public technical literature, the following search results were obtained:

[0005] 1. Chinese patent document: "A programmable high-power load card that is easy to control", patent (application) number: 202022255564.3; the technical solution recorded is:

[0006] "A programmable high-power load card that is easy to control, comprising a resistor box, a resistor board and a relay. The surface of the resistor board is provided with a number of resistors, and each digit of the resistance value can encode all values ​​of 1-9 in the combination of 1, 1, 2, 5. A total of 2 groups of 4 fixed resistors are used in combination with 2×4=8 relays to encode any resistance value from 10 ohms to 1000 ohms with a step length of 10 ohms; the inner wall of the resistor box is provided with a guide rail, and the resistor board is installed on the guide rail; the inner side of the resistor board is provided with a mounting plate, and the relays are equidistantly installed on the mounting plate";

[0007] The technical effects recorded are:

[0008] “It has good versatility and can encode any resistance value from 10 ohms to 1000 ohms in steps of 10 ohms. It uses a small number of power resistors with special resistance values ​​and can be controlled by relays to form a programmable resistor with a step size of 10ohm-1Kohm / 10ohm. It also has a communication interface to achieve program control and can be used in the field of automated testing.”

[0009] 2. Chinese patent document: "A system and method for testing AC charging piles", patent (application) number: 202310872596.3; the technical solution recorded is:

[0010] "The AC charging pile test system includes a phase-controlled power supply device, a three-phase programmable system and a three-phase programmable resistance load system. It uses the set initial parameters including voltage values, uses the set threshold comparison method for automated testing, uses the number threshold comparison method to filter the voltage output value, and dynamically adjusts the voltage."

[0011] The technical effects recorded are:

[0012] "It is used to automatically test charging piles; 1. The three-phase programmable power supply system and the three-phase programmable resistance load system are compatible with both three-phase products to be tested and single-phase products. Because the parameters can be set, the automation can meet the test of products to be tested with multiple parameters, greatly reducing the errors introduced by humans and improving the credibility of the test data; 2. It can realize unattended automated testing while ensuring accuracy and issue a detailed test report; 3. The test data is accurate and can fully meet the control guidance and high-voltage electrical signal measurement at the ms level in the national standard test. The oscilloscope has solved the problems of the existing technology well; 4. It is easy to operate; in the configuration interface, the configured data can be saved independently and an independent engineering file can be generated for later use; 5. It is comprehensive in function; in addition to meeting the national standard test items, the test logic can also be customized; in addition, it also realizes the test of power metering, leakage test, fault injection, card swiping distance and induction range; 6. It realizes bench automation testing and can provide more detailed signal waveforms and parameters. When the test items fail, it can provide effective analysis data for R&D personnel, greatly improving efficiency."

[0013] However, the above-mentioned public technical documents and public application of existing technical solutions have not been able to solve the problems and defects existing in the prior art, such as "the high price of programmable resistor boards, low flexibility in application configuration such as channel settings, and redundant resistance range and accuracy". Summary of the invention

[0014] The invention provides a resistor plate with programmable adjustable resistance, the purpose of which is to improve the flexible adaptability of resistance value adjustment.

[0015] In order to achieve the above object, the technical solution adopted by the present invention is:

[0016] The programmable resistance-adjustable resistor board of the present invention comprises a programmable resistor board, wherein the programmable resistor board is provided with a signal terminal; the programmable resistance-adjustable resistor board is also provided with a digital quantity output board card, wherein the programmable resistor board is connected to the digital quantity output board card via a programming control cable; and the output resistance signal of the programmable resistor board is connected to the signal terminal.

[0017] The programmable resistor board is provided with a resistance adjustment mechanism; the resistance adjustment mechanism includes a plurality of resistance adjustment groups, each resistance adjustment group includes a plurality of fixed resistance resistors, each fixed resistance resistor is connected in parallel with a control relay, and the control relay is connected to the digital quantity output board card through a signal control circuit; when the control relay is closed, the related fixed resistance resistor is short-circuited; when the control relay is disconnected, the related fixed resistance resistor is connected to the total circuit of the programmable resistor board.

[0018] The number of the resistance adjustment groups is 8; each of the resistance adjustment groups includes four fixed resistance resistors, whose resistance values ​​are 8, 4, 2, and 1 respectively.

[0019] Each of the control relays is correspondingly provided with a relay status indication.

[0020] The programmable resistor board is provided with a resistance regulating group switching mechanism, and the resistance regulating group switching mechanism is provided with a resistance signal jumper; the resistance signal jumper is used to switch adjacent resistance regulating groups on and off through a sliding button.

[0021] The resistance regulating group switching mechanism is provided with a resistance signal jumper; the two ends of the resistance signal jumper are respectively arranged at the head and the tail of each resistance regulating group, so as to realize the parallel connection or series connection of the resistance regulating group in the total circuit of the programmable resistance board.

[0022] The programmable resistor board is provided with a control connector; the programming control cable is connected to the programmable resistor board via the control connector.

[0023] The programmable resistor board is provided with a power supply terminal, and the power supply terminal includes two voltage levels of 0V and +12V.

[0024] A self-recovering power fuse and a power indicator light are also arranged on the programmable resistor board.

[0025] A circuit fuse is arranged on the resistance circuit of the programmable resistance board.

[0026] The present invention adopts the above technical scheme, and the number of channels can be freely configured, the application is flexible, the wiring is simple, the cost performance is high, the service life is long, and the stability is high. It is particularly suitable for the resistance type analog signal input test during the automatic test of the ECU; through the use of the resistance adjustment mechanism and the resistance adjustment group switching mechanism, the channels can be freely configured to be independent or merged according to the number of channels required for the test, the resistance range and the accuracy requirements, and the three modes of pull-up, pull-down and both ends of each channel signal can be preset, thereby saving wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The contents shown in the attached drawings and the symbols in the drawings are briefly described as follows:

[0028] Figure 1 It is a schematic diagram of the resistance plate structure of the present invention;

[0029] Figure 2 This is a connection diagram of the resistor board and the digital output board card of the present invention.

[0030] The markings in the figure are:

[0031] 1. Digital output board; 2. Programming control cable; 3. Programmable resistor board; 4. Control connector; 5. Power terminal; 6. Signal terminal; 7. Control relay; 8. Relay status indicator; 9. Resistor signal jumper; 10. Resistor signal jumper; 11. Power self-recovery fuse; 12. Power indicator light; 13. Circuit fuse. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0033] like Figure 1 , Figure 2 The structure of the present invention is a resistor plate with programmable adjustable resistance, including a programmable resistor plate 3 , wherein the programmable resistor plate 3 is provided with a signal terminal 6 .

[0034] A signal terminal 6 is installed at one edge of the upper surface of the resistor plate 3, and a plurality of connection pins are arranged on the signal terminal 6. The signal terminal 6 usually has an I / O port to realize the control of the on-off of the control relay 7.

[0035] In order to solve the problems existing in the prior art and overcome its defects, and to achieve the invention purpose of improving the flexible adaptability of resistance value adjustment, the technical solution adopted by the present invention is:

[0036] like Figure 2 As shown, the programmable resistor board with adjustable resistance in the present invention is provided with a digital output board 1, and the programmable resistor board 3 is connected to the digital output board 1 through a programming control cable 2; the output resistance signal of the programmable resistor board 3 is connected to the signal terminal 6.

[0037] Connect the output end on the digital output board 1 to the control connector 4 on the resistor board 3 through a dedicated cable 2 to achieve control connection;

[0038] The output end of the digital output board 1 is electrically connected to one end of the programming control cable 2. The digital output board 1 is connected to the programmable control interface through the programming control cable 2, so as to facilitate the corresponding control operation of the control element on the resistor board 3.

[0039] The digital output board 1 is programmed through a programmable controller to obtain the required resistance value.

[0040] The programmable resistor board 3 is provided with a resistance adjustment mechanism; the resistance adjustment mechanism includes a plurality of resistance adjustment groups, each resistance adjustment group includes a plurality of fixed resistance resistors, each fixed resistance resistor is connected in parallel with a control relay 7, and the control relay 7 is connected to the digital quantity output board 1 through a signal control circuit; when the control relay 7 is closed, the related fixed resistance resistor is short-circuited; when the control relay 7 is disconnected, the related fixed resistance resistor is connected to the total circuit of the programmable resistor board 3.

[0041] There are multiple groups of resistance adjustment mechanisms, which are equidistantly arranged on the upper surface of the programmable resistor board 3 near the center; wherein each group of resistance adjustment mechanisms includes a control relay 7 and a relay status indicator 8; the control relay 7 is installed on the upper surface of the programmable resistor board 3, and the relay status indicator 8 is installed on the upper surface of the resistor board 3, and the relay status indicator 8 is located on one side of the control relay 7.

[0042] The digital output board 1 drives the coil of the control relay 7 board to close, thereby controlling the action of the corresponding control relay 7 contact; the action of the control relay 7 contact controls the switching of the corresponding fixed resistance resistor.

[0043] When the control relay 7 is not in operation (ie, normally closed), the resistance of this path is 0; when the control relay 7 is in operation (ie, disconnected), the resistance of this path is switched into the total resistance of the group, forming the accumulation of the resistance of this group.

[0044] like Figure 1 As shown:

[0045] The number of the resistance adjustment groups is 8; each of the resistance adjustment groups includes four fixed resistance resistors, whose resistance values ​​are 8, 4, 2, and 1 respectively.

[0046] That is, a total of 32 fixed-resistance resistors are arranged in the programmable resistor board 3, which are divided into 8 groups, each group of 4 fixed-resistance resistors, and are configured according to the coding rules of 8, 4, 2, 1, so as to realize continuous adjustment of the resistance in this gear; the 4 fixed-resistance resistors are connected end to end, and each group of 4 control relays 7 controls whether the 4 resistors are switched on or off.

[0047] The 8, 4, 2, and 1 mentioned here can be ohms (Ω), kilohms (kΩ), or other resistance units, which can be determined according to needs.

[0048] The 32 control relays 7 in the programmable resistor board 3 respectively control the switching of resistors 8, 4, 2, and 1 to form different resistance values.

[0049] For example, when all or part of the fixed resistance resistors of a resistance adjustment group are connected in series, any resistance value between 1 and 15 can be obtained. These different resistance values ​​are all programmed through programmable control.

[0050] Each of the control relays 7 is provided with a relay status indicator 8 for displaying the working status of the control relay 7, so that the working status of the control relay 7 can be conveniently checked.

[0051] The control relay 7, the relay state indicator 8, the resistor signal jumper 10 and the resistor signal jumper cap 9 are all welded on the programmable resistor board 3, which is convenient for use and easy to disassemble and replace.

[0052] The programmable resistor board 3 is provided with a resistance regulating group switching mechanism, and the resistance regulating group switching mechanism is provided with a resistance signal jumper 9; the resistance signal jumper 9 is used to switch adjacent resistance regulating groups on and off through a sliding button.

[0053] The resistance adjustment grouping and switching mechanism is arranged on the programmable resistor board 3, and is used to realize three modes of pull-up, pull-down and both ends are suspended; wherein, the resistance adjustment grouping and switching mechanism includes a plurality of resistance signal jumper caps 9 and a plurality of resistance signal jumper wires 10, and the plurality of resistance signal jumper caps 9 are installed on the upper surface of the programmable resistor board 3 near the center of one side edge, and the plurality of resistance signal jumper wires 10 are installed on the upper surface of the programmable resistor board 3 near the center of one side edge.

[0054] The two ends of the resistance signal jumper 10 are respectively arranged at the head and the tail of each resistance adjustment group, so as to realize the parallel connection or series connection of the resistance adjustment group in the total circuit of the programmable resistance board 3 .

[0055] The ends of each group of resistors can be short-circuited through a resistor signal jumper 10 to achieve series connection between channels; each group of resistor signal jumpers 9 can also be used to achieve application scenario requirements of preset pull-up or pull-down at one end of the resistor.

[0056] The present invention has the following beneficial effects:

[0057] 1. Through the use of the resistance adjustment mechanism, the resistance can be continuously adjusted in the corresponding gear. Each resistor is connected end to end. Each group of 4 control relays controls the switching of 4 fixed resistance resistors. It has high cost performance, long life, high stability, free configuration of channel quantity, flexible application, simple wiring, and is more suitable for resistance type analog signal input test during ECU automatic testing.

[0058] 2. Through the use of the resistance adjustment group switching mechanism, the channels can be freely configured to be independent or combined according to the number of channels to be tested, the resistance range and the accuracy requirements. The three modes of pull-up, pull-down and both ends of each channel signal can be preset to save wiring. At the same time, more flexible pre-configuration options can be provided for different application requirements.

[0059] The programmable resistor board 3 is provided with a control connector 4 ; the programming control cable 2 is connected to the programmable resistor board 3 via the control connector 4 .

[0060] The output end of the digital output board 1 is connected to the control connector 4 on the programmable resistor board 3 through the programming control cable 2 to achieve control connection; the control connector 4 is fixedly connected to the center of one edge of the upper surface of the programmable resistor board 3, and the inside of the control connector 4 is electrically connected to one end of the programming control cable 2. The control connector 4 is used to connect the programmable resistor board 3 with an external device to ensure the normal use of the programmable resistor board 3. The programming control cable 2 is connected to the control connector 4 for easy disassembly.

[0061] A power terminal 5 is installed near the edge of the upper surface of the programmable resistor board 3, and the power terminal 5 includes two voltage levels of 0V and +12V. The power terminal 5 is connected to a +12V power supply. The power terminal 5 includes 0V and +12V, which are used to provide the required weak point voltage for the programmable resistor board 3 so that the components on the programmable resistor board 3 can be used normally.

[0062] A self-resetting fuse 11 is installed at one edge of the upper surface of the resistor plate 3, and a power indicator light 12 is installed at one edge of the upper surface of the programmable resistor plate 3. The power indicator light 12 can display the use status of the resistor plate 3. The self-resetting fuse 11 and the power indicator light 12 are installed on the power circuit to protect and indicate the power supply.

[0063] The resettable fuse 11 is an overcurrent electronic protection element, which is made of high molecular organic polymer under high pressure, high temperature, vulcanization reaction conditions, mixed with conductive particle materials, and processed by special technology; the overcurrent protection of traditional fuses can only protect once, and needs to be replaced if it burns out, while the resettable fuse 11 has the dual functions of overcurrent and overheat protection and automatic recovery, and can be used multiple times, which is convenient for saving resources;

[0064] A circuit fuse 13 is provided on the resistance circuit of the programmable resistance board 3. The circuit fuse 13 is installed on one side of the upper surface of the programmable resistance board 3 near the center of the edge.

[0065] The circuit fuse 13 has the same performance as the self-recovering fuse 11 and has a self-recovering function, so it can be used more economically.

[0066] Application method of the present invention:

[0067] When using, check the integrity of the digital output board 1, programming control cable 2 and programmable resistor board 3 to ensure that they can be used normally;

[0068] The programmable resistor board 3 is powered by +12V from the power supply terminal 5, so that the programmable resistor board 3 can function normally;

[0069] The output resistance signal is connected to signal terminal 6;

[0070] The beginning and the end of each group of resistance signals can be short-circuited by a resistance signal jumper 10, and the resistance signal jumpers 10 are electrically connected by wires to achieve series connection between channels; each group of resistance signal jumper caps 9 can also be used to preset a pull-up or pull-down at one end of the resistance signal, and the pull-up and pull-down signals are protected by a self-recovering circuit fuse 13.

[0071] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A resistor plate with programmable adjustable resistance, comprising a programmable resistor plate (3), wherein the programmable resistor plate (3) is provided with a signal terminal (6); characterized in that: The programmable resistance plate is also provided with a digital output card (1); the programmable resistance plate (3) is connected to the digital output card (1) via a programming control cable (2); the output resistance signal of the programmable resistance plate (3) is connected to a signal terminal (6).

2. The programmable resistance-adjustable resistor board according to claim 1, characterized in that: The programmable resistor board (3) is provided with a resistance adjustment mechanism; the resistance adjustment mechanism includes a plurality of resistance adjustment groups, each resistance adjustment group includes a plurality of fixed resistance resistors, each fixed resistance resistor is connected in parallel to a control relay (7), and the control relay (7) is connected to the digital quantity output board (1) through a signal control circuit; when the control relay (7) is closed, the related fixed resistance resistor is short-circuited; when the control relay (7) is disconnected, the related fixed resistance resistor is connected to the total circuit of the programmable resistor board (3).

3. The programmable resistance-adjustable resistor board according to claim 2, characterized in that: The number of the resistance adjustment groups is 8; each of the resistance adjustment groups includes four fixed resistance resistors, whose resistance values ​​are 8, 4, 2, and 1 respectively.

4. The programmable resistance-adjustable resistor board according to claim 1, characterized in that: Each of the control relays (7) is correspondingly provided with a relay status indicator (8).

5. The programmable resistance-adjustable resistor board according to claim 2, characterized in that: The programmable resistor board (3) is provided with a resistance regulating group switching mechanism, and the resistance regulating group switching mechanism is provided with a resistance signal jumper (9); the resistance signal jumper (9) is used to switch adjacent resistance regulating groups on and off through a sliding button.

6. The programmable resistance-adjustable resistor board according to claim 5, characterized in that: The resistance adjustment group switching mechanism is provided with a resistance signal jumper (10); the two ends of the resistance signal jumper (10) are respectively arranged at the head and the tail of each resistance adjustment group, so as to realize the parallel connection or series connection of the resistance adjustment group in the total circuit of the programmable resistance board (3).

7. The resistor board with programmable adjustable resistance according to claim 1, characterized in that: The programmable resistor board (3) is provided with a control connector (4); the programming control cable (2) is connected to the programmable resistor board (3) via the control connector (4).

8. The resistor board with programmable adjustable resistance according to claim 1, characterized in that: A power terminal (5) is provided on the programmable resistor board (3), and the power terminal (5) includes two voltage levels: 0V and +12V.

9. The resistor board with programmable adjustable resistance according to claim 8, characterized in that: A self-recovering power fuse (11) and a power indicator light (12) are also provided on the programmable resistor board (3).

10. The resistor board with programmable adjustable resistance according to claim 1, characterized in that: A circuit fuse (13) is arranged on the resistance circuit of the programmable resistance board (3).

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