Eight-wire AC switch machine test circuit

Abstract

The invention discloses an eight-wire AC switch test circuit, comprising an eight-wire indication logic check module, which is connected to the eight-wire AC switch, applies forward and reverse DC detection voltage signals to the switch, obtains the detection result and judges whether the eight-wire AC switch indication circuit has a fault. The invention provides an eight-wire AC switch test circuit, which uses the eight-wire indication logic check module to detect the eight-wire AC switch, and judges whether the eight-wire switch indication circuit has a fault.

Description

Technical Field

[0001] The invention relates to the technical field of railway detection equipment, in particular to an eight-wire AC switch machine test circuit. Background Art

[0002] A switch machine is an important signal infrastructure equipment used to reliably switch the position of the switch, change the direction of the switch opening, lock the switch point rail, and reflect the position of the switch. It can well ensure driving safety, improve transportation efficiency, and improve the labor intensity of drivers.

[0003] The functions of the switch machine mainly include the following four aspects:

[0004] (1) Change the position of the turnout, switching it to the fixed position or reverse position as needed;

[0005] (2) After the turnout is turned to the required position and is tightly attached, it is locked to prevent external force from switching the turnout;

[0006] (3) Correctly reflect the actual position of the turnout, and give the corresponding indication after the turnout point rail is in close contact with the stock rail;

[0007] (4) When the turnout is squeezed or is in the "four-open" position (the point rails on both sides are not tightly attached) for some reason, an alarm and indication shall be given in time.

[0008] It can be seen that the switch machine is crucial to railway safety. In the following scenarios, the switch machine needs to be tested to verify whether it is intact.

[0009] Typical application scenarios at indoor distribution panels:

[0010] 1) For new lines, when indoor construction is not yet completed and not ready for use, the outdoor turnouts are tested separately.

[0011] 2) For reconstruction of existing lines, when indoor conditions are not available but outdoor cables are newly laid, outdoor turnouts are tested in advance separately.

[0012] Typical applications in special scenarios:

[0013] 1) The control cables for the switch machines on the new line have not yet been laid and are used for outdoor turnout testing and calibration.

[0014] 2) For existing line reconstruction projects, cables should be reused and outdoor turnouts should be tested in advance.

[0015] 3) Turnout failure emergency repair test.

[0016] 4) Used for turnout fault diagnosis and analysis.

[0017] Therefore, the defect of the prior art is that there is a lack of an eight-wire AC switch test circuit, and an eight-wire indication logic check module is used to detect the eight-wire AC switch to determine whether the eight-wire AC switch indication circuit has a fault. Summary of the invention

[0018] In view of at least one defect of the prior art, an object of the present invention is to provide an eight-wire AC switch test circuit, which uses an eight-wire indication logic check module to detect the eight-wire AC switch and determine whether there is a fault in the eight-wire AC switch indication circuit.

[0019] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an eight-wire AC switch machine test circuit, including an eight-wire indication logic check module, the eight-wire indication logic check module is connected to the eight-wire AC switch machine, applies forward and reverse DC detection voltage signals to it, and obtains its detection results to determine whether there is a fault in the eight-wire AC switch machine indication circuit.

[0020] The logic method of the eight-wire indication logic check module is as follows: Position indication circuit logic: check that the loop X8→X6 only constitutes a one-way loop, the loop X8→X7 is blocked, and the eight-wire indication logic check module outputs a positioning indication; reverse position indication circuit logic: check that the loop X7→X8 only constitutes a one-way loop, the loop X6→X8 is blocked, and the eight-wire indication logic check module outputs a reverse position indication.

[0021] The eight-wire representation logic check module is provided with a microprocessor, and the microprocessor is connected with an eight-wire logic detection circuit;

[0022] The eight-line logic detection circuit includes an eight-line commutation logic interlock circuit, a relay K5, a relay K6, a relay K7, an X6 sampling circuit and an X7 sampling circuit;

[0023] The eight-line switching logic interlock circuit includes a NOT gate U61, a NOT gate U62 and an analog switch U6. The microprocessor is provided with an eight-line switching control terminal GPIO11. The eight-line switching control terminal GPIO11 is connected to the input end of the NOT gate U61, the output end of the NOT gate U61 is connected to the IN1 end of the analog switch U6, the NO1 end of the analog switch U6 is connected to the A5V DC power supply, and the NC1 end of the analog switch U6 is grounded.

[0024] Terminal 16 of relay K5 is connected to the control terminal GPIO10 of the microprocessor, terminal 1 of relay K5 is connected to the D5V DC power supply, terminal 13 of relay K5 is connected to the indicating contact X8 of the eight-wire AC switch machine; terminal 11 of relay K5 is suspended; terminal 9 of relay K5 is connected to the COM1 terminal of the analog switch U6; the COM1 terminal of the analog switch U6 is grounded via the bidirectional voltage regulator D19;

[0025] The output end of the NOT gate U61 is also connected to the input end of the NOT gate U62, the output end of the NOT gate U62 is connected to the IN2 end of the analog switch U6, the NO2 end of the analog switch U6 is connected to the A5V DC power supply, the COM2 end of the analog switch U6 is connected to the X7 sampling circuit; the NC2 end of the analog switch U6 is grounded;

[0026] Terminal 16 of relay K6 is connected to the control terminal GPIO9 of the microprocessor, terminal 1 of relay K6 is connected to the D5V DC power supply, terminal 13 of relay K6 is connected to the indicating contact X7 of the eight-wire AC switch machine; terminal 11 of relay K6 is suspended; terminal 9 of relay K6 is connected to one end of the resistor R73 of the X7 sampling circuit, terminal 9 of relay K6 is also grounded via the bidirectional voltage regulator D13, the other end of the resistor R73 is connected to the head end of the adjustable resistor R72, the adjustable end of the adjustable resistor R72 is connected to the head end and serves as the output end AD7 of the X7 sampling circuit, and the output end AD7 is connected to the sampling end MCU ADC14 of the microprocessor; the tail end of the adjustable resistor R72 is connected to the COM2 end of the analog switch U6;

[0027] Terminal 16 of relay K7 is connected to the control terminal GPIO4 of the microprocessor, terminal 1 of relay K7 is connected to the D5V DC power supply, terminal 13 of relay K7 is connected to the indicating contact X6 of the eight-wire AC switch machine; terminal 11 of relay K7 is suspended; terminal 9 of relay K7 is connected to one end of the resistor R66 of the X6 sampling circuit, terminal 9 of relay K7 is also grounded through the bidirectional voltage regulator D24, the other end of the resistor R66 is connected to the head end of the adjustable resistor R64, the adjustable end of the adjustable resistor R64 is connected to its head end and serves as the output end AD6 of the X6 sampling circuit, the output end AD6 is connected to the sampling end MCU ADC13 of the microprocessor; the tail end of the adjustable resistor R64 is grounded.

[0028] The output terminal AD6 of the X6 sampling circuit is connected to the sampling terminal MCU ADC13 of the microprocessor via the fifth proportional amplifier circuit; the output terminal AD7 of the X7 sampling circuit is connected to the sampling terminal MCU ADC14 of the microprocessor via the sixth proportional amplifier circuit.

[0029] The microprocessor is connected to a motor commutation circuit; the motor commutation circuit is provided with a motor commutation logic interlock circuit, the microprocessor is provided with a motor control terminal GPIO0 and a motor control terminal GPIO1, the motor control terminal GPIO0 is connected to a D3.3V DC power supply via a pull-up resistor R60, the motor control terminal GPIO1 is connected to a D3.3V DC power supply via a pull-up resistor R61, the motor commutation logic interlock circuit is provided with an XOR gate U20, an AND gate U25 and an AND gate U26, the motor control terminal GPIO0 and the motor control terminal GPIO1 are respectively connected to two input terminals of the XOR gate U20, the output terminal of the XOR gate U20 is connected to an input terminal A2 of the AND gate U25 and an input terminal B1 of the AND gate U26, the motor control terminal GPIO0 is also connected to an input terminal B2 of the AND gate U25; the motor control terminal GPIO1 is also connected to an input terminal A1 of the AND gate U26; the output terminal of the AND gate U25 is connected to one end of a resistor R59, and the other end of the resistor R59 serves as a first output terminal DR of the motor commutation logic interlock circuit. CCW is connected to the forward control circuit of the switch machine; the output end of the AND gate U26 is connected to one end of the resistor R58, and the other end of the resistor R58 is used as the second output end DR CW of the motor commutation logic interlock circuit to connect the reverse control circuit of the switch machine.

[0030] The motor commutation logic interlock circuit is connected to a detection prohibition logic control circuit; the detection prohibition logic control circuit is provided with an OR gate U38 and a buffer driver U14, the two input ends of the OR gate U38 are respectively connected to the output end of the AND gate U25 and the output end of the AND gate U26, and the output end of the OR gate U38 is connected to the enable end 1OE# and the enable end 2OE# of the buffer driver U14;

[0031] The control terminals GPIO10, GPIO9 and GPIO4 of the microprocessor are connected to the terminals 16 of the relay K5, 16 of the relay K6 and 16 of the relay K7 respectively through corresponding switches of the buffer driver U14.

[0032] Significant effect: The present invention provides an eight-wire AC switch machine test circuit, uses an eight-wire indication logic check module to detect the eight-wire AC switch machine, and determines whether there is a fault in the eight-wire AC switch machine indication circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is the control circuit diagram of a five-wire AC switch machine;

[0034] Figure 2 This is the control circuit diagram of the eight-wire AC switch machine;

[0035] Figure 3 It is a module structure diagram of the present invention;

[0036] Figure 4 is a detailed circuit module structure diagram of the present invention;

[0037] Figure 5 It is a schematic diagram of the positioning equivalent detection circuit of the five-wire AC switch machine;

[0038] Figure 6 It is the logic detection circuit diagram of the five-wire AC switch machine;

[0039] Figure 7 It is the logic detection circuit diagram of eight-wire AC switch machine;

[0040] Figure 8 is a circuit diagram of a first proportional amplification circuit;

[0041] Fig. 9 is a circuit diagram of a second proportional amplification circuit;

[0042] Fig.10 is a circuit diagram of a third proportional amplification circuit;

[0043] Fig.11 is a circuit diagram of a fourth proportional amplifier circuit;

[0044] Fig.12 is a circuit diagram of a fifth proportional amplifier circuit;

[0045] Fig.13 is a circuit diagram of a sixth proportional amplifier circuit;

[0046] Fig.14 This is the circuit diagram of the A phase current detection circuit of the main circuit;

[0047] Fig.15 This is the circuit diagram of the main circuit B phase current detection circuit;

[0048] Fig.16 This is the circuit diagram of the main circuit C phase current detection circuit;

[0049] Fig.17 This is the circuit diagram of the power module;

[0050] Fig.18 A circuit diagram of a microprocessor;

[0051] Fig.19 This is the circuit diagram of the motor commutation circuit. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1-Figure 19 The intelligent turnout tester is further explained in detail.

[0053] Figure 1 It is the control circuit diagram of the five-wire AC switch machine; among them, X1, X2, and X5 are the reverse position positioning start lines, and X1, X4, and X3 are the positioning reverse position start lines; Figure 2This is the control circuit diagram of the eight-wire AC switch machine; the eight-wire turnout is a solution for the separation of turnout indication and start-up circuits introduced in Beijing Metro in recent years to solve the problem of arcing and burning of 2DQJ contacts. The action circuit and indication circuit are independent and do not affect each other, thus solving the problem of large current arcing of 2DQJ contacts during the circuit conversion start-up process caused by the asynchronous power access caused by the start-up time difference between 1DQJ and 2DQJ. The indication circuit principle is the same as the traditional four-wire DC turnout circuit. The positioning indication X8→X6 forms a path, and the reverse position indicates that X7→X8 forms a path. X8 is a shared loop. They are all existing mature technologies, and their working principles will not be introduced again.

[0054] like Figure 2 As shown, after the eight-wire turnout indication circuit separates the action and indication, the corresponding circuit is simpler. For the tester, the original five-wire external output is only used for the fixed and reverse action drive application, and three more wires are added as indication circuit inspection lines.

[0055] Positioning indication circuit logic: Check that X8→X6 only forms a one-way loop (other loops are blocked), and the logic check module outputs a positioning indication. Reverse position indication circuit logic: Check that X7→X8 only forms a one-way loop (other loops are blocked), and the logic check module outputs a reverse position indication.

[0056] like Figure 1-Figure 19 As shown, an intelligent turnout tester includes a five-wire indication logic check module, which is connected to a five-wire AC switch machine, applies forward and reverse DC detection voltage signals to it, and obtains its detection results to determine whether there are faults in the indication contacts and coils of the five-wire switch machine.

[0057] The present invention changes the power supply used by the indicating circuit into direct current, and realizes the purpose of indicating contact and coil inspection by cleverly designing the indicating logic inspection module.

[0058] Five-wire turnout indication circuit: According to circuit analysis, in order to ensure that the AC turnout switch indication circuit can fully check the switch coil, contacts and diodes, ensure that the turnout position is correctly indicated, and automatically determine that the diode polarity is correctly connected, a polarity error prompt is added to the reverse position indication circuit. A diode polarity error prompt light is also added. The modified indication equivalent circuit is as follows: Figure 3 shown.

[0059] The five-wire logic inspection module indicates the circuit logic method as follows: perform a dual-circuit DC bidirectional inspection, circuit X2-X1, circuit X4-X1;

[0060] Condition 1: Forward check, X2 and X4 are positive, X1 is negative, when the action is in place and the diode polarity is correct, both X2→X1 and X4→X1 circuits are connected;

[0061] Condition 2: Reverse check, switch the five wires to indicate the positive and negative poles of the logic check module, X2 and X4 are negative poles, X1 is positive pole, X1→X4 loop is connected, but X1→X2 loop is blocked due to reverse blocking of diode;

[0062] When condition one and condition two checks are all met, the five-wire indication logic check module outputs "position indication", indicating that there is no fault, otherwise there is a fault.

[0063] When the check results of condition 1 and condition 2 are opposite, it means that the diode polarity connection is wrong. The five-line indicates that the logic check module outputs the prompt "Diode polarity error";

[0064] When the results of condition 1 and condition 2 check show that all four circuits are connected, it means that the outdoor diode indicates the circuit is short-circuited, and the five-wire indication logic check module outputs the prompt "indicates the circuit short-circuit error";

[0065] When the results of condition 1 and condition 2 show that 2 or more circuits are blocked, it means the circuit is open, and the five-wire logic check module outputs the prompt "circuit open error". It can effectively check the short circuit, open circuit, polarity error, etc. of the outdoor switch circuit.

[0066] The reverse position indication circuit of the five-wire indication logic check module has an external line loop of X1-X3 and X1-X5, and the logic principle is the same as above. In the forward check, X1→X3 and X1→X5 are all connected, and in the reverse check, X5→X1 is connected and X3→X1 is not connected, and the output is "reverse position indication", indicating that there is no fault, otherwise there is a fault.

[0067] The five-wire indication logic check module is provided with a microprocessor, and the microprocessor is connected with a five-wire positioning logic detection circuit and a five-wire inversion logic detection circuit;

[0068] like Figure 6 As shown, the five-wire positioning logic detection circuit includes a five-wire positioning reversing logic interlocking circuit, an interlocking relay K2, a relay K1, an X2 sampling circuit and an X4 sampling circuit;

[0069] The five-wire positioning switching logic interlock circuit includes a NOT gate U21, a NOT gate U22 and an analog switch U2. The microprocessor is provided with a five-wire positioning control terminal GPIO12. The five-wire positioning control terminal GPIO12 is connected to the input end of the NOT gate U21, the output end of the NOT gate U21 is connected to the IN1 end of the analog switch U2, the NO1 end of the analog switch U2 is connected to the A5V DC power supply, the COM1 end of the analog switch U2 is connected to the X2 sampling circuit and the X4 sampling circuit; the NC1 end of the analog switch U2 is grounded; the output end of the NOT gate U21 is also connected to the input end of the NOT gate U22, and the NOT gate U2 The output end of 2 is connected to the IN2 end of the analog switch U2, the NO2 end of the analog switch U2 is connected to the A5V DC power supply, the NC2 end of the analog switch U2 is grounded, and the COM2 end of the analog switch U2 is connected to the 9 end of the interlocking relay K2; the COM2 end of the analog switch U2 is also grounded through the bidirectional voltage regulator D14, and the 11 end of the interlocking relay K2 is suspended; the 13 end of the interlocking relay K2 is connected to the indicating contact X1 of the five-wire AC switch machine; the 16 end of the interlocking relay K2 is connected to the control end GPIO7 of the microprocessor; the 1 end of the interlocking relay K2 is connected to the D5V DC power supply;

[0070] Terminal 16 of relay K1 is connected to the control terminal GPIO8 of the microprocessor, terminal 1 of relay K1 is connected to the D5V DC power supply, the indicating contact X2 of the five-wire AC switch is connected to terminal 13 of relay K1, terminal 11 of relay K1 is suspended, terminal 9 of relay K1 is grounded via a bidirectional voltage regulator D12, terminal 9 of relay K1 is connected to one end of the resistor R3 of the X2 sampling circuit, the other end of the resistor R3 is connected to the head end of the adjustable resistor R1, the adjustable end of the adjustable resistor R1 is connected to the head end and serves as the output end AD2 of the X2 sampling circuit and connected to the sampling end MCU ADC0 of the microprocessor; the tail end of the adjustable resistor R1 is connected to the COM1 end of the analog switch U2;

[0071] The indicating contact X4 of the five-wire AC switch is connected to the 4th terminal of the relay K1, the 6th terminal of the relay K1 is suspended, the 8th terminal of the relay K1 is grounded via the bidirectional voltage regulator D18, the 8th terminal of the relay K1 is connected to one end of the resistor R4 of the X4 sampling circuit, the other end of the resistor R4 is connected to the head end of the adjustable resistor R2, the adjustable end of the adjustable resistor R2 is connected to the head end and serves as the output end AD4 of the X4 sampling circuit and connected to the sampling end MCU ADC1 of the microprocessor; the tail end of the adjustable resistor R2 is connected to the COM1 end of the analog switch U2;

[0072] The five-wire positioning control terminal GPIO12 of the microprocessor sends out high and low level signals. Through the control of the NOT gate U21 and the NOT gate U22, when the COM2 terminal of the analog switch U2 is connected to the 5V power supply, the COM1 terminal of the analog switch U2 is grounded, and the current flows from X1 to X4 and X1 to X2; when the COM1 terminal of the analog switch U2 is connected to the 5V power supply, the COM2 terminal of the analog switch U2 is grounded, and the current flows from X4 to X1 and X2 to X1.

[0073] When the current flows from X1 to X4, X1 to X2; the 5V power supply passes through the COM2 terminal of the analog switch U2 → the 9 terminal of the interlock relay K2 → the 13 terminal of the interlock relay K2 → the contact X1;

[0074] Representation point X1→representation point X4→terminal 4 of relay K1→terminal 8 of relay K1→resistor R4→adjustable resistor R2→terminal COM1 of analog switch U2→ground; Representation point X1→representation point X2→terminal 13 of relay K1→terminal 9 of relay K1→resistor R3→adjustable resistor R1→terminal COM1 of analog switch U2→ground;

[0075] The control terminal GPIO7 controls the on and off of the coil of the interlock relay K2; the control terminal GPIO8 controls the on and off of the coil of the relay K1. A relay coil is connected between the 16th and 1st terminals of the relay K1, and the 13th and 9th terminals form a first normally open switch, and the 13th and 11th terminals form a first normally closed switch. When the 13th terminal is connected to the 11th terminal, it means that the 13th terminal of the relay K1 is suspended; the 4th and 8th terminals form a second normally open switch, and the 4th and 6th terminals form a second normally closed switch. The control terminal GPIO7 controls its action through the coil. The rest of the relay structures are the same and will not be repeated. For the analog switch U2, when COM2 is connected to NC2, COM2 is grounded, when COM2 is connected to NO2, COM2 is connected to a 5V power supply, when COM1 is connected to NC1, COM1 is grounded, and when COM1 is connected to NO1, COM1 is connected to a 5V power supply. It is controlled by the NOT gates U21 and U11, and the rest of the analog switch structures are the same.

[0076] On the contrary, when the current flows from X4 to X1, X2 to X1; the 5V power supply passes through the COM1 terminal of the analog switch U2 → the adjustable resistor R2 → the resistor R4 → the 8th terminal of the relay K1 → the 4th terminal of the relay K1 → the indicating contact X4 → the indicating contact X1; the 5V power supply passes through the COM1 terminal of the analog switch U2 → the adjustable resistor R1 → the resistor R3 → the 9th terminal of the relay K1 → the 13th terminal of the relay K1 → the indicating contact X2 → the indicating contact X1;

[0077] It represents contact X1 → terminal 13 of interlock relay K2 → terminal 9 of interlock relay K2 → terminal COM2 of analog switch U2 → ground.

[0078] The five-wire reverse logic detection circuit includes a five-wire reverse switching logic interlocking circuit, an interlocking relay K4, a relay K3, an X3 sampling circuit and an X5 sampling circuit;

[0079] The five-wire inversion switching logic interlock circuit includes a NOT gate U12, a NOT gate U11 and an analog switch U1. The microprocessor is provided with a five-wire inversion control terminal GPIO3. The five-wire inversion control terminal GPIO3 is connected to the input end of the NOT gate U12, the output end of the NOT gate U12 is connected to the IN1 end of the analog switch U1, the NO1 end of the analog switch U1 is connected to the A5V DC power supply, the COM1 end of the analog switch U1 is connected to the X3 sampling circuit and the X5 sampling circuit; the NC1 end of the analog switch U1 is grounded; the output end of the NOT gate U12 is also connected to the input end of the NOT gate U11, and the NOT gate U11 is connected to the COM1 end of the analog switch U1. The output end is connected to the IN2 end of the analog switch U1, the NO2 end of the analog switch U1 is connected to the A5V DC power supply, the NC2 end of the analog switch U1 is grounded, and the COM2 end of the analog switch U1 is connected to the 9 end of the interlocking relay K4; the COM2 end of the analog switch U1 is also grounded through the bidirectional voltage regulator D15, and the 11 end of the interlocking relay K4 is suspended; the 13 end of the interlocking relay K4 is connected to the indicating contact X1 of the five-wire AC switch machine; the 16 end of the interlocking relay K4 is connected to the control end GPIO6 of the microprocessor; the 1 end of the interlocking relay K4 is connected to the D5V DC power supply;

[0080] Terminal 16 of relay K3 is connected to the control terminal GPIO5 of the microprocessor, terminal 1 of relay K3 is connected to the D5V DC power supply, the indicating contact X5 of the five-wire AC switch is connected to terminal 13 of relay K3, terminal 11 of relay K3 is suspended, terminal 9 of relay K3 is grounded via a bidirectional voltage regulator D17, terminal 9 of relay K3 is connected to one end of resistor R7 of the X5 sampling circuit, the other end of resistor R7 is connected to the head end of the adjustable resistor R5, the adjustable end of the adjustable resistor R5 is connected to the head end and serves as the output end AD5 of the X5 sampling circuit and is connected to the sampling end MCU ADC6 of the microprocessor; the tail end of the adjustable resistor R5 is connected to the COM1 end of the analog switch U1;

[0081] The indicating contact X3 of the five-wire AC switch is connected to the 4th terminal of the relay K3, the 6th terminal of the relay K3 is suspended, the 8th terminal of the relay K3 is grounded via the bidirectional voltage regulator D16, the 8th terminal of the relay K3 is connected to one end of the resistor R8 of the X3 sampling circuit, the other end of the resistor R8 is connected to the first end of the adjustable resistor R6, the adjustable end of the adjustable resistor R6 is connected to the first end and serves as the output end AD3 of the X3 sampling circuit to connect to the sampling end MCU ADC2 of the microprocessor; the tail end of the adjustable resistor R6 is connected to the COM1 end of the analog switch U1.

[0082] The five-wire inversion control terminal GPIO3 of the microprocessor sends out high and low level signals. Through the control of the NOT gate U12 and the NOT gate U11, when the COM2 terminal of the analog switch U1 is connected to the 5V power supply, the COM1 terminal of the analog switch U1 is grounded, and the current flows from X1 to X5 and X1 to X3; when the COM1 terminal of the analog switch U1 is connected to the 5V power supply, the COM2 terminal of the analog switch U1 is grounded, and the current flows from X5 to X1 and X3 to X1.

[0083] When the current flows from X1 to X5, X1 to X3; the 5V power supply passes through the COM2 terminal of the analog switch U1 → the 9 terminal of the interlock relay K4 → the 13 terminal of the interlock relay K4 → the contact X1;

[0084] Representation point X1→representation point X3→terminal 4 of relay K3→terminal 8 of relay K3→resistor R8→adjustable resistor R6→terminal COM1 of analog switch U1→ground; Representation point X1→representation point X5→terminal 13 of relay K3→terminal 9 of relay K3→resistor R7→adjustable resistor R5→terminal COM1 of analog switch U1→ground;

[0085] The control terminal GPIO6 controls the on and off of the coil of the interlock relay K4; the control terminal GPIO5 controls the on and off of the coil of the relay K3.

[0086] On the contrary, when the current flows from X5 to X1, X3 to X1; the 5V power supply passes through the COM1 terminal of the analog switch U1 → the adjustable resistor R6 → the resistor R8 → the 8th terminal of the relay K3 → the 4th terminal of the relay K3 → the indicating contact X3 → the indicating contact X1; the 5V power supply passes through the COM1 terminal of the analog switch U1 → the adjustable resistor R5 → the resistor R7 → the 9th terminal of the relay K3 → the 13th terminal of the relay K3 → the indicating contact X5 → the indicating contact X1;

[0087] It represents contact X1→terminal 13 of interlock relay K4→terminal 9 of interlock relay K4→terminal COM2 of analog switch U1→ground.

[0088] Terminal 1 of the interlock relay K2 is connected to terminal 4 of the interlock relay K4, and terminal 6 of the interlock relay K4 is connected to a D5V DC power supply; terminal 8 of the interlock relay K4 is suspended; terminal 1 of the interlock relay K4 is connected to terminal 4 of the interlock relay K1, and terminal 6 of the interlock relay K1 is connected to a D5V DC power supply; terminal 8 of the interlock relay K1 is suspended;

[0089] The coil of interlock relay K2 is connected to the DC power supply via the normally closed switch of interlock relay K4, and the coil of interlock relay K4 is connected to the DC power supply via the normally closed switch of interlock relay K2. When the coil of interlock relay K2 is energized, the coil of interlock relay K4 is cut off, and when the coil of interlock relay K4 is energized, the coil of interlock relay K2 is cut off, thus realizing interlock control. Figure 8-Figure 11 As shown, the output end AD2 of the X2 sampling circuit is connected to the sampling end MCU ADC0 of the microprocessor via the first proportional amplification circuit; the output end AD4 of the X4 sampling circuit is connected to the sampling end MCU ADC1 of the microprocessor via the second proportional amplification circuit; the output end AD3 of the X3 sampling circuit is connected to the sampling end MCU ADC2 of the microprocessor via the third proportional amplification circuit; the output end AD5 of the X5 sampling circuit is connected to the sampling end MCU ADC6 of the microprocessor via the fourth proportional amplification circuit. The above-mentioned proportional amplification circuits amplify the collected signals through the operational amplifier circuits U71, U72, etc. and transmit them to the microprocessor. After the microprocessor obtains the signals through the sampling circuits, it determines whether there are faults in the contacts and coils of the five-wire AC switch machine.

[0090] Figure 4 and Figure 6 There is only one five-wire AC switch machine in the figure, and the equivalent diagrams are respectively the five-wire AC switch machine equivalent diagram when in position representation and the five-wire AC switch machine equivalent diagram when in reverse position representation.

[0091] The truth table of the above five-wire detection circuit is as follows: Table 1: Five-wire positioning logic table

[0092]

[0093] Table 2: The five-wire system represents the reverse logic table, which prevents power short circuit from hardware when X1, X2, X3, X4, and X5 are reversed.

[0094]

[0095] Table 3: Prevent short circuit in forward and reverse directions from being connected simultaneously from hardware perspective.

[0096]

[0097] Table 4: When the motor is rotating forward or reverse, the hardware prevents the motor from short-circuiting in the commutation direction; all relays are disabled and in the disconnected state.

[0098]

[0099] It also includes an eight-wire logic inspection module, which is connected to an eight-wire AC switch machine, applies forward and reverse DC detection voltage signals to it, and obtains its detection results to determine whether the eight-wire switch machine has a fault.

[0100] The logic method of the eight-wire indication logic check module is as follows: Position indication circuit logic: check that the loop X8→X6 only constitutes a one-way loop, the loop X8→X7 is blocked, and the eight-wire indication logic check module outputs a positioning indication; reverse position indication circuit logic: check that the loop X7→X8 only constitutes a one-way loop, the loop X6→X8 is blocked, and the eight-wire indication logic check module outputs a reverse position indication.

[0101] The eight-wire representation logic check module is provided with a microprocessor, and the microprocessor is connected with an eight-wire logic detection circuit;

[0102] The eight-line logic detection circuit includes an eight-line commutation logic interlock circuit, a relay K5, a relay K6, a relay K7, an X6 sampling circuit and an X7 sampling circuit;

[0103] The eight-line switching logic interlock circuit includes a NOT gate U61, a NOT gate U62 and an analog switch U6. The microprocessor is provided with an eight-line switching control terminal GPIO11. The eight-line switching control terminal GPIO11 is connected to the input end of the NOT gate U61, the output end of the NOT gate U61 is connected to the IN1 end of the analog switch U6, the NO1 end of the analog switch U6 is connected to the A5V DC power supply, and the NC1 end of the analog switch U6 is grounded.

[0104] Terminal 16 of relay K5 is connected to the control terminal GPIO10 of the microprocessor, terminal 1 of relay K5 is connected to the D5V DC power supply, terminal 13 of relay K5 is connected to the indicating contact X8 of the eight-wire AC switch machine; terminal 11 of relay K5 is suspended; terminal 9 of relay K5 is connected to the COM1 terminal of the analog switch U6; the COM1 terminal of the analog switch U6 is grounded via the bidirectional voltage regulator D19;

[0105] The output end of the NOT gate U61 is also connected to the input end of the NOT gate U62, the output end of the NOT gate U62 is connected to the IN2 end of the analog switch U6, the NO2 end of the analog switch U6 is connected to the A5V DC power supply, the COM2 end of the analog switch U6 is connected to the X7 sampling circuit; the NC2 end of the analog switch U6 is grounded;

[0106] Terminal 16 of relay K6 is connected to the control terminal GPIO9 of the microprocessor, terminal 1 of relay K6 is connected to the D5V DC power supply, terminal 13 of relay K6 is connected to the indicating contact X7 of the eight-wire AC switch machine; terminal 11 of relay K6 is suspended; terminal 9 of relay K6 is connected to one end of the resistor R73 of the X7 sampling circuit, terminal 9 of relay K6 is also grounded via the bidirectional voltage regulator D13, the other end of the resistor R73 is connected to the head end of the adjustable resistor R72, the adjustable end of the adjustable resistor R72 is connected to the head end and serves as the output end AD7 of the X7 sampling circuit, and the output end AD7 is connected to the sampling end MCU ADC14 of the microprocessor; the tail end of the adjustable resistor R72 is connected to the COM2 end of the analog switch U6;

[0107] Terminal 16 of relay K7 is connected to the control terminal GPIO4 of the microprocessor, terminal 1 of relay K7 is connected to the D5V DC power supply, terminal 13 of relay K7 is connected to the indicating contact X6 of the eight-wire AC switch machine; terminal 11 of relay K7 is suspended; terminal 9 of relay K7 is connected to one end of the resistor R66 of the X6 sampling circuit, terminal 9 of relay K7 is also grounded through the bidirectional voltage regulator D24, the other end of the resistor R66 is connected to the head end of the adjustable resistor R64, the adjustable end of the adjustable resistor R64 is connected to its head end and serves as the output end AD6 of the X6 sampling circuit, the output end AD6 is connected to the sampling end MCU ADC13 of the microprocessor; the tail end of the adjustable resistor R64 is grounded.

[0108] The eight-wire switching control terminal GPIO11 of the microprocessor sends high and low level signals. Through the control of the NOT gate U61 and the NOT gate U62, when the COM1 terminal of the analog switch U6 is connected to the 5V power supply, the COM2 terminal of the analog switch U6 is grounded, and the current flows from X8 to X6, X8 to X7 (not connected); when the COM2 terminal of the analog switch U6 is connected to the 5V power supply, the COM1 terminal of the analog switch U6 is grounded, and the current flows from X7 to X8, X6 to X8 (the ground voltage is zero);

[0109] When the current flows from X8 to X6, X8 to X7, the 5V power supply passes through the COM1 terminal of the analog switch U6, the 9 terminal of the relay K5, the 13 terminal of the relay K5, and the contact X8;

[0110] Representation point X8 → representation point X6 → terminal 13 of relay K7 → terminal 9 of relay K7 → resistor R66 → adjustable resistor R64 → ground; representation point X8 → representation point X7 → terminal 13 of relay K6 → terminal 9 of relay K6 → resistor R73 → adjustable resistor R72 → terminal COM2 of analog switch U6 → ground;

[0111] The control terminal GPIO10 controls the on and off of the coil of relay K5; the control terminal GPIO4 controls the on and off of the coil of relay K7. The control terminal GPIO9 controls the on and off of the coil of relay K6. A relay coil is connected between the 16th and 1st terminals of relay K5, and the 13th and 9th terminals form a first normally open switch, and the 13th and 11th terminals form a first normally closed switch. When the 13th terminal is connected to the 11th terminal, it means that the 13th terminal of relay K1 is suspended; the 4th and 8th terminals form a second normally open switch, and the 4th and 6th terminals form a second normally closed switch. The remaining relay structures are the same and will not be repeated. For the analog switch U6, when COM2 is connected to NC2, COM2 is grounded, when COM2 is connected to NO2, COM2 is connected to a 5V power supply, when COM1 is connected to NC1, COM1 is grounded, and when COM1 is connected to NO1, COM1 is connected to a 5V power supply, and is controlled by the NOT gates U61 and U62.

[0112] On the contrary, when the current flows from X7 to X8, X6 to X8; the 5V power supply passes through the COM2 terminal of the analog switch U6 → the adjustable resistor R72 → the resistor R73 → the 9 terminal of the relay K6 → the 13 terminal of the relay K6 → the indicating contact X7 → the indicating contact X8; the ground (voltage is 0) → the adjustable resistor R64 → the resistor R66 → the 9 terminal of the relay K7 → the 13 terminal of the relay K7 → the indicating contact X6 → the indicating contact X8;

[0113] Indicating contact X8 → terminal 13 of relay K5 → terminal 9 of relay K5 → terminal COM1 of analog switch U6 → ground. The indicating circuit of the eight-wire AC switch is tested through the above current path.

[0114] The output terminal AD6 of the X6 sampling circuit is connected to the sampling terminal MCU ADC13 of the microprocessor via the fifth proportional amplifier circuit; the output terminal AD7 of the X7 sampling circuit is connected to the sampling terminal MCU ADC14 of the microprocessor via the sixth proportional amplifier circuit. The fifth proportional amplifier circuit and the sixth proportional amplifier circuit amplify the voltage signal of the sampling circuit and transmit it to the microprocessor, and the microprocessor determines whether the indication circuit of the eight-wire AC switch machine has a fault. When there is no positioning indication and reverse position indication, the switch machine has a fault.

[0115] Table 5: Eight-wire circuit logic table

[0116]

[0117] The microprocessor is connected to a motor commutation circuit; the motor commutation circuit is provided with a motor commutation logic interlock circuit, the microprocessor is provided with a motor control terminal GPIO0 and a motor control terminal GPIO1, the motor control terminal GPIO0 is connected to a D3.3V DC power supply via a pull-up resistor R60, the motor control terminal GPIO1 is connected to a D3.3V DC power supply via a pull-up resistor R61, the motor commutation logic interlock circuit is provided with an XOR gate U20, an AND gate U25 and an AND gate U26, the motor control terminal GPIO0 and the motor control terminal GPIO1 are respectively connected to two input terminals of the XOR gate U20, the output terminal of the XOR gate U20 is connected to an input terminal A2 of the AND gate U25 and an input terminal B1 of the AND gate U26, the motor control terminal GPIO0 is also connected to an input terminal B2 of the AND gate U25; the motor control terminal GPIO1 is also connected to an input terminal A1 of the AND gate U26; the output terminal of the AND gate U25 is connected to one end of a resistor R59, and the other end of the resistor R59 serves as a first output terminal DR of the motor commutation logic interlock circuit. CCW is connected to the forward control circuit of the switch machine; the output end of the AND gate U26 is connected to one end of the resistor R58, and the other end of the resistor R58 is used as the second output end DR CW of the motor commutation logic interlock circuit to connect the reverse control circuit of the switch machine.

[0118] Through the control of XOR gate U20, AND gate U25 and AND gate U26, when the motor control terminal GPIO0 outputs a signal, the forward control circuit of the switch machine works, and when the motor control terminal GPIO1 outputs a signal, the reverse control circuit of the switch machine works. When both the motor control terminal GPIO0 and the motor control terminal GPIO1 output signals, the forward control circuit and the reverse control circuit of the switch machine do not work, thereby preventing short circuit during motor reversing from a hardware perspective. The forward control circuit and the reverse control circuit of the switch machine are both existing mature technologies and will not be described in detail.

[0119] The motor reversing logic interlock circuit is connected with a detection prohibition logic control circuit; the detection prohibition logic control circuit is provided with an OR gate U38 and a buffer driver U14, the two input ends of the OR gate U38 are respectively connected to the output ends of the AND gate U25 and the output ends of the AND gate U26, and the output end of the OR gate U38 is connected to the enable end 1OE# and the enable end 2OE# of the buffer driver U14; the five-wire inversion control end GPIO3, the control end GPIO5, the control end GPIO6, the control end GPIO7, and the control end GPIO8 are respectively connected to the input end of the NOT gate U12, the 16 end of the relay K3, the 16 end of the interlock relay K4, the 16 end of the interlock relay K2, and the 16 end of the relay K1 through the corresponding switches of the buffer driver U14. The control end GPIO10, the control end GPIO9, and the control end GPIO4 of the microprocessor are respectively connected to the 16 end of the relay K5, the 16 end of the relay K6, and the 16 end of the relay K7 through the corresponding switches of the buffer driver U14.

[0120] Through the above circuit setting, the OR gate U38 obtains the signal of the output end of the AND gate U25 and the output end of the AND gate U26. When one of the switch forward control circuit and the switch reverse control circuit is working, the output end of the OR gate U38 sends a signal to the enable end 1OE# and the enable end 2OE# of the buffer driver U14, so that all switches of the buffer driver U14 are turned off, and the relay K3, interlock relay K4, interlock relay K2, relay K1, relay K5, relay K6, and relay K7 all stop working. This prevents the detection circuit from connecting the indicating contact when the switch is forward or reverse, thereby damaging the detection circuit.

[0121] like Figure 14-16As shown, the three-phase AC power supply of the switch machine is provided with the A-phase current detection circuit, the B-phase current detection circuit, and the C-phase current detection circuit. The three-phase current of the switch machine is detected and sent to the microprocessor. When one of the phases is disconnected, the microprocessor controls the forward control circuit and the reverse control circuit of the switch machine to stop working and sends an alarm signal. Among them, L3 is a mutual inductor to detect the A-phase current. After obtaining the current signal, it is rectified by the bridge circuit, filtered by the capacitor, and transmitted to the operational amplifier current amplification, and the amplified signal is transmitted to the microprocessor. The principle of the B-phase and C-phase is the same. When the motor of the switch machine is working, its three-phase current should be basically the same. The microprocessor is connected to a touch screen to control the tester and display alarm information and fault detection information.

[0122] Finally, it should be noted that the above examples are only specific implementation examples of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. An eight-wire AC switch machine test circuit, characterized in that: It includes an eight-wire indication logic check module, which is connected to an eight-wire AC switch machine, applies a DC detection voltage signal to it, obtains its detection result and determines whether there is a fault in the indication circuit of the eight-wire AC switch machine; The eight-wire representation logic check module is provided with a microprocessor, and the microprocessor is connected with an eight-wire logic detection circuit; The eight-line logic detection circuit includes an eight-line commutation logic interlock circuit, a relay K5, a relay K6, a relay K7, an X6 sampling circuit and an X7 sampling circuit; The eight-line switching logic interlock circuit includes a NOT gate U61, a NOT gate U62 and an analog switch U6. The microprocessor is provided with an eight-line switching control terminal GPIO11. The eight-line switching control terminal GPIO11 is connected to the input end of the NOT gate U61, the output end of the NOT gate U61 is connected to the IN1 end of the analog switch U6, the NO1 end of the analog switch U6 is connected to the A5V DC power supply, and the NC1 end of the analog switch U6 is grounded. Terminal 16 of relay K5 is connected to the control terminal GPIO10 of the microprocessor, terminal 1 of relay K5 is connected to the D5V DC power supply, terminal 13 of relay K5 is connected to the indicating contact X8 of the eight-wire AC switch machine; terminal 11 of relay K5 is suspended; terminal 9 of relay K5 is connected to the COM1 terminal of the analog switch U6; the COM1 terminal of the analog switch U6 is grounded via the bidirectional voltage regulator D19; The output end of the NOT gate U61 is also connected to the input end of the NOT gate U62, the output end of the NOT gate U62 is connected to the IN2 end of the analog switch U6, the NO2 end of the analog switch U6 is connected to the A5V DC power supply, the COM2 end of the analog switch U6 is connected to the X7 sampling circuit; the NC2 end of the analog switch U6 is grounded; Terminal 16 of relay K6 is connected to the control terminal GPIO9 of the microprocessor, terminal 1 of relay K6 is connected to the D5V DC power supply, terminal 13 of relay K6 is connected to the indicating contact X7 of the eight-wire AC switch machine; terminal 11 of relay K6 is suspended; terminal 9 of relay K6 is connected to one end of the resistor R73 of the X7 sampling circuit, terminal 9 of relay K6 is also grounded via the bidirectional voltage regulator D13, the other end of the resistor R73 is connected to the head end of the adjustable resistor R72, the adjustable end of the adjustable resistor R72 is connected to the head end and serves as the output end AD7 of the X7 sampling circuit, and the output end AD7 is connected to the sampling end MCU ADC14 of the microprocessor; the tail end of the adjustable resistor R72 is connected to the COM2 end of the analog switch U6; Terminal 16 of relay K7 is connected to the control terminal GPIO4 of the microprocessor, terminal 1 of relay K7 is connected to the D5V DC power supply, terminal 13 of relay K7 is connected to the indicating contact X6 of the eight-wire AC switch machine; terminal 11 of relay K7 is suspended; terminal 9 of relay K7 is connected to one end of the resistor R66 of the X6 sampling circuit, terminal 9 of relay K7 is also grounded through the bidirectional voltage regulator D24, the other end of the resistor R66 is connected to the head end of the adjustable resistor R64, the adjustable end of the adjustable resistor R64 is connected to its head end and serves as the output end AD6 of the X6 sampling circuit, the output end AD6 is connected to the sampling end MCU ADC13 of the microprocessor; the tail end of the adjustable resistor R64 is grounded.

2. The eight-wire AC switch machine test circuit according to claim 1 is characterized in that: The logic method of the eight-wire indication logic check module is as follows: Position indication circuit logic: check that the loop X8→X6 only constitutes a one-way loop, and the eight-wire indication logic check module outputs a positioning indication; reverse position indication circuit logic: check that the loop X7→X8 only constitutes a one-way loop, and the eight-wire indication logic check module outputs a reverse position indication.

3. The eight-wire AC switch machine test circuit according to claim 1 is characterized in that: The output terminal AD6 of the X6 sampling circuit is connected to the sampling terminal MCU ADC13 of the microprocessor via the fifth proportional amplifier circuit; the output terminal AD7 of the X7 sampling circuit is connected to the sampling terminal MCU ADC14 of the microprocessor via the sixth proportional amplifier circuit.

4. The eight-wire AC switch machine test circuit according to claim 3 is characterized in that: The microprocessor is connected to a motor commutation circuit; the motor commutation circuit is provided with a motor commutation logic interlock circuit, the microprocessor is provided with a motor control terminal GPIO0 and a motor control terminal GPIO1, the motor control terminal GPIO0 is connected to a D3.3V DC power supply via a pull-up resistor R60, the motor control terminal GPIO1 is connected to a D3.3V DC power supply via a pull-up resistor R61, the motor commutation logic interlock circuit is provided with an XOR gate U20, an AND gate U25 and an AND gate U26, the motor control terminal GPIO0 and the motor control terminal GPIO1 are respectively connected to two input terminals of the XOR gate U20, the output terminal of the XOR gate U20 is connected to an input terminal A2 of the AND gate U25 and an input terminal B1 of the AND gate U26, the motor control terminal GPIO0 is also connected to an input terminal B2 of the AND gate U25; the motor control terminal GPIO1 is also connected to an input terminal A1 of the AND gate U26; the output terminal of the AND gate U25 is connected to one end of a resistor R59, and the other end of the resistor R59 serves as a first output terminal DR of the motor commutation logic interlock circuit. CCW is connected to the forward control circuit of the switch machine; the output end of the AND gate U26 is connected to one end of the resistor R58, and the other end of the resistor R58 is used as the second output end DR CW of the motor commutation logic interlock circuit to connect the reverse control circuit of the switch machine.

5. The eight-wire AC switch machine test circuit according to claim 4 is characterized in that: The motor commutation logic interlock circuit is connected to a detection prohibition logic control circuit; the detection prohibition logic control circuit is provided with an OR gate U38 and a buffer driver U14, the two input ends of the OR gate U38 are respectively connected to the output end of the AND gate U25 and the output end of the AND gate U26, and the output end of the OR gate U38 is connected to the enable end 1OE# and the enable end 2OE# of the buffer driver U14; The control terminals GPIO10, GPIO9 and GPIO4 of the microprocessor are connected to the terminals 16 of the relay K5, 16 of the relay K6 and 16 of the relay K7 respectively through corresponding switches of the buffer driver U14.

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