Three-redundancy-based electromagnetic valve control system

Abstract

The invention relates to the technical field of control equipment, and discloses a three-redundancy-based electromagnetic valve control system which comprises a time delay relay circuit, a DC / DC and anti-reverse circuit and a three-redundancy control circuit, the time delay relay circuit comprises a first time delay relay, a first rectifier diode, a first control module, a second control module and a third control module, and the first control module, the second control module and the third control module are connected in parallel. The first control module, the second control module and the third control module are respectively connected with three groups of different electromagnetic valve control signals, and any group of electromagnetic valve control signals effectively control the first delay relay to work; the DC / DC and anti-reverse circuit comprises a first DC / DC conversion circuit and a first ideal diode; the triple-redundancy control circuit comprises a fourth control module, a fifth control module and a sixth control module which are connected in parallel, one end of the first control module is connected with the negative electrode of the electromagnetic valve working power supply, the other end of the first control module is connected with the other end of the electromagnetic valve, and any group of electromagnetic valve control signals effectively control the electromagnetic valve to work. By adopting the method, three-redundancy control can be realized, and the reliability of an electromagnetic valve control system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of control equipment, and more specifically, to a solenoid valve control system based on triple redundancy. Background Art

[0002] In the field of launch vehicles, solenoid valves are widely used in the attitude control of launch vehicles. Attitude control is an important part of the flight mission and is directly related to the success or failure of the flight mission. Therefore, the control circuit of the solenoid valve is particularly important.

[0003] Usually, the corresponding number of solenoid valve control circuits are designed according to the actual number of solenoid valve circuits, and only point number redundancy backup is made on the connector. However, this design method cannot eliminate the single-point failure mode of the circuit and there are hidden safety risks. Another common method is to use redundant design for single-way solenoid valve control circuits. Although it improves reliability to a certain extent, it still cannot eliminate the single CPU failure mode and the high heat generation of the solenoid valve. Summary of the invention

[0004] In order to solve the problem that the existing solenoid valve control system cannot eliminate the single-point failure mode of the circuit, the present invention provides a solenoid valve control system based on triple redundancy, which will realize triple redundancy control and improve the reliability of the solenoid valve control system.

[0005] To achieve the above object, the present invention provides a solenoid valve control system based on triple redundancy, the system comprising:

[0006] A time delay relay circuit comprises a first time delay relay, a first rectifier diode, a first control module, a second control module and a third control module connected in parallel, wherein the second end of the first time delay relay is connected to the positive electrode of the electromagnetic valve working power supply and the negative electrode of the first rectifier diode, the sixth end of the first time delay relay is connected to one end of the first control module and the positive electrode of the first rectifier diode, the other end of the first control module is connected to the negative electrode of the electromagnetic valve working power supply, and the first end of the first time delay relay is connected to one end of the electromagnetic valve; each control module is respectively connected to three groups of different electromagnetic valve control signals, and any group of electromagnetic valve control signals is effective to control the first time delay relay to work;

[0007] The DC / DC and anti-reverse circuit comprises a first DC / DC conversion circuit and a first ideal diode, one end of the first DC / DC conversion circuit is connected to the positive electrode of the power supply, the other end of the first DC / DC conversion circuit is connected to one end of the first ideal diode, and the other end of the first ideal diode is connected to one end of the solenoid valve;

[0008] A triple redundant control circuit comprises a fourth control module, a fifth control module and a sixth control module connected in parallel, wherein one end of the fourth control module is connected to the negative pole of a power supply, and the other end thereof is connected to the other end of a solenoid valve; the fourth, fifth and sixth control modules are respectively connected to three groups of different solenoid valve control signals, and any group of solenoid valve control signals can effectively control the operation of the solenoid valve; and the fourth control module and the first control module have the same circuit structure and the connected solenoid valve control signal, the fifth control module and the second control module have the same circuit structure and the connected solenoid valve control signal, and the sixth control module and the third control module have the same circuit structure and the connected solenoid valve control signal.

[0009] Furthermore, the first control module, the second control module and the third control module each include two N-channel MOS tubes and a resistor connected to each N-channel MOS tube, and three groups of different solenoid valve control signals are obtained by combining the first control signal, the second control signal and the third control signal in pairs.

[0010] Further, the first control module includes a first N-channel MOS transistor, a first resistor, a second N-channel MOS transistor and a second resistor, wherein the fourth end of the first N-channel MOS transistor is connected to the third control signal and one end of the first resistor, and the other end of the first resistor is connected to the negative electrode of the power supply; the fourth end of the second N-channel MOS transistor is connected to the first control signal and one end of the second resistor, and the other end of the second resistor is connected to the negative electrode of the power supply; the first end, the second end, and the third end of the first N-channel MOS transistor are all connected to the fifth end, the sixth end, the seventh end, and the eighth end of the second N-channel MOS transistor, and the first end, the second end, and the third end of the second N-channel MOS transistor are all connected to the negative electrode of the power supply.

[0011] Further, the second control module includes a third N-channel MOS transistor, a third resistor, a fourth N-channel MOS transistor and a fourth resistor, wherein the fourth end of the third N-channel MOS transistor is connected to the second control signal and one end of the third resistor, and the other end of the third resistor is connected to the negative electrode of the power supply; the fourth end of the fourth N-channel MOS transistor is connected to the third control signal and one end of the fourth resistor, and the other end of the fourth resistor is connected to the negative electrode of the power supply; the first end, the second end, and the third end of the third N-channel MOS transistor are all connected to the fifth end, the sixth end, the seventh end, and the eighth end of the fourth N-channel MOS transistor, and the first end, the second end, and the third end of the fourth N-channel MOS transistor are all connected to the negative electrode of the power supply.

[0012] Further, the third control module includes a fifth N-channel MOS tube, a fifth resistor, a sixth N-channel MOS tube and a sixth resistor, wherein the fourth end of the fifth N-channel MOS tube is connected to the first control signal and one end of the fifth resistor, and the other end of the fifth resistor is connected to the negative electrode of the power supply; the fourth end of the sixth N-channel MOS tube is connected to the second control signal and one end of the sixth resistor, and the other end of the sixth resistor is connected to the negative electrode of the power supply; the first end, the second end and the third end of the fifth N-channel MOS tube are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the sixth N-channel MOS tube, and the first end, the second end and the third end of the sixth N-channel MOS tube are all connected to the negative electrode of the power supply.

[0013] Furthermore, the first ideal diode includes a first MOS tube and a first ideal diode driver, and the first DC / DC conversion circuit is connected to the positive pole of the power supply, and is used to convert the solenoid valve action voltage into the solenoid valve holding voltage; the first end, the second end, and the third end of the first MOS tube are all connected to the solenoid valve holding voltage, and its fourth end is connected to the fourth end of the first ideal diode driver, and its fifth end, sixth end, seventh end, and eighth end are all connected to one end of the solenoid valve; the first end of the first ideal diode driver is connected to the solenoid valve holding voltage, its fifth end is connected to the negative pole of the power supply, its seventh end is connected to the negative pole of the power supply through a capacitor, and its eighth end is connected to one end of the solenoid valve.

[0014] Furthermore, the time delay relay circuit also includes a second time delay relay and a second rectifier diode. The second time delay relay and the first time delay relay are connected in parallel, and the second rectifier diode and the first rectifier diode are connected in parallel.

[0015] Furthermore, the DC / DC and anti-reverse circuit also includes a second DC / DC conversion circuit and a second ideal diode, the second DC / DC conversion circuit is connected in parallel with the first DC / DC conversion circuit, and the second ideal diode is connected in parallel with the first ideal diode.

[0016] Furthermore, the triple redundant control circuit also includes a discharge circuit, which includes a first diode, a second diode, a third diode, a fourth diode, a fifty-fifth resistor, and a fifty-sixth resistor, wherein: the positive electrode of the first diode is connected to one end of the fifty-sixth resistor, and the other end of the fifty-sixth resistor is connected to the negative electrode interface of the solenoid valve, the negative electrode of the first diode is connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the positive electrode interface of the solenoid valve; the positive electrode of the third diode is connected to one end of the fifty-fifth resistor, and the other end of the fifty-fifth resistor is connected to the negative electrode interface of the solenoid valve, the negative electrode of the third diode is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected to the positive electrode interface of the solenoid valve.

[0017] Furthermore, the triple redundant control circuit also includes an electromagnetic valve action detection circuit, which includes an eighty-fourth resistor, a first one-twelfth resistor and a voltage regulator, wherein: the first end of the eighty-fourth resistor is connected to the negative electrode interface of the electromagnetic valve, the second end thereof is connected to the first end of the first one-twelfth resistor, and the second end thereof is also connected to the electromagnetic valve action detection signal; the second end of the first one-twelfth resistor is connected to the negative electrode of the power supply; the positive electrode of the voltage regulator is connected to the second end of the first one-twelfth resistor, and the negative electrode thereof is connected to the first end of the first one-twelfth resistor.

[0018] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0019] (1) The solenoid valve control system based on triple redundancy provided by the present invention realizes triple redundancy control through a time delay relay circuit, a DC / DC and an anti-reverse circuit and a triple redundant control circuit, thereby improving the reliability of the solenoid valve control system. It can not only eliminate the single CPU failure and single point failure failure modes, but also adapt to the reliable operation of solenoid valves with a wide range of different power supply voltages. At the same time, it can also reduce the heat generated by the solenoid valve and improve the execution capability of attitude control.

[0020] (2) The solenoid valve control system based on triple redundancy provided by the present invention has a simple circuit principle, stable operation, safety and reliability, and is easy to transplant to other equipment, and can be applied to attitude control on launch vehicle control equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A structural block diagram of a solenoid valve control system based on triple redundancy provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a time delay relay circuit in a solenoid valve control system based on triple redundancy provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of a DC / DC and anti-reverse circuit in a solenoid valve control system based on triple redundancy provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of a triple redundant control circuit in a solenoid valve control system based on triple redundancy provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] The terms "first", "second", "third", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0028] Figure 1 The following is a structural block diagram of a solenoid valve control system based on triple redundancy. Figure 1 As shown, the solenoid valve control system based on triple redundancy includes a time delay relay circuit, a DC / DC and anti-reverse circuit, and a triple redundant control circuit. Among them, the time delay relay circuit includes a first time delay relay, a first rectifier diode, a first control module, a second control module, and a third control module connected in parallel. These three control modules are collectively called triple redundant control modules, which are independent of each other. Each control module is connected to three different groups of solenoid valve control signals respectively. Any group of solenoid valve control signals will effectively control the solenoid valve to work. The three different groups of solenoid valve control signals are obtained by combining the first control signal, the second control signal, and the third control signal in pairs, and are all composed of two N-channel MOS tubes and two resistors.

[0029] The second end of the first time delay relay is connected to the positive pole of the electromagnetic valve working power supply and the negative pole of the first rectifier diode, the sixth end of the first time delay relay is connected to one end of the first control module and the positive pole of the first rectifier diode, the other end of the first control module is connected to the negative pole of the electromagnetic valve working power supply, and the first end of the first time delay relay is connected to one end of the electromagnetic valve (corresponding to the positive pole interface DCF+ of the electromagnetic valve). The first, second, and third control modules are respectively connected to three groups of different electromagnetic valve control signals, and any group of electromagnetic valve control signals will effectively control the operation of the first time delay relay. The DC / DC and anti-reverse circuit includes a first DC / DC conversion circuit and a first ideal diode, one end of the first DC / DC conversion circuit is connected to the positive pole of the electromagnetic valve working power supply, and the other end is connected to one end of the first ideal diode, and the other end of the first ideal diode is connected to one end of the electromagnetic valve.

[0030] The triple redundant control circuit includes a fourth control module, a fifth control module, and a sixth control module connected in parallel, one end of the fourth control module is connected to the negative pole of the power supply, and the other end thereof is connected to the other end of the solenoid valve (corresponding to the negative pole interface DCF- of the solenoid valve); the fourth, fifth, and sixth control modules are respectively connected to three groups of different solenoid valve control signals, and any group of solenoid valve control signals will effectively control the operation of the solenoid valve; and the fourth control module and the first control module have the same circuit structure and the connected solenoid valve control signal, the fifth control module and the second control module have the same circuit structure and the connected solenoid valve control signal, and the sixth control module and the third control module have the same circuit structure and the connected solenoid valve control signal.

[0031] The working principle of the solenoid valve control system based on three redundancy is as follows: in the initial stage, the first time delay relay does not work, the positive pole of the solenoid valve working power supply is connected to one end of the solenoid valve, the first DC / DC conversion circuit in the DC / DC and anti-reverse circuit converts the solenoid valve action voltage provided by the solenoid valve working power supply into the solenoid valve holding voltage, and the first ideal diode is cut off; when any group of solenoid valve control signals is valid, one of the fourth, fifth, and sixth control modules works, so that the negative pole of the solenoid valve working power supply is connected to the other end of the solenoid valve, and the solenoid valve working power supply provides the solenoid valve action voltage for the solenoid valve; and, when any group of solenoid valve control signals is valid, the first time delay relay works after the delay setting time, disconnecting the positive pole of the solenoid valve working power supply and one end of the solenoid valve; at this time, the first ideal diode in the DC / DC and anti-reverse circuit is turned on, connecting one end of the solenoid valve to the positive pole of the solenoid valve working power supply, and providing the holding voltage for the solenoid valve. The present embodiment provides a solenoid valve control system based on triple redundancy. In the initial stage, by receiving the solenoid valve control signal, the delay relay circuit and the triple redundant control circuit are controlled to connect the solenoid valve working power supply, and the solenoid valve is powered by the solenoid valve action voltage provided by the solenoid valve working power supply, so that the solenoid valve works normally. At the same time, the DC / DC and anti-reverse circuit connect the solenoid valve working power supply to reduce the solenoid valve action voltage provided by the solenoid valve working power supply to the solenoid valve holding voltage, and also play a role in preventing backflow; the first delay relay is actuated after the delay setting time, so that the positive pole of the solenoid valve working power supply and one end of the solenoid valve are disconnected. At this time, the solenoid valve is powered by the solenoid valve holding voltage provided by the DC / DC and the anti-reverse circuit, thereby improving the reliability of the solenoid valve operation.

[0032] Figure 2 The figure is a schematic diagram of the delay relay circuit in the solenoid valve control system based on triple redundancy. Figure 2As shown, the delay relay circuit includes a first delay relay K1, a second delay relay K2, a first rectifier diode V73, a second rectifier diode V74, a first control module (including a first N-channel MOS tube V77, a second N-channel MOS tube V78, a first resistor R223 and a second resistor R226), a second control module (including a third N-channel MOS tube V79, a fourth N-channel MOS tube V80, a third resistor R224 and a fourth resistor R225), and a third control module (including a fifth N-channel MOS tube V81, a sixth N-channel MOS tube V82, a fifth resistor R222 and a sixth resistor R227).

[0033] For the reliability of circuit operation, the first delay relay K1 and the second delay relay K2 are designed with parallel redundancy. Specifically, the first end of the first delay relay K1 and the second delay relay K2 are connected to the positive electrode interface DCF+ of the solenoid valve, the third end of the first delay relay K1 and the second delay relay K2 are connected to the positive electrode of the solenoid valve working power supply (providing the action voltage of the solenoid valve, i.e., the solenoid valve action voltage) +BB_DCF, the second end of the first delay relay K1 is connected to its third end, the second end of the second delay relay K2 is connected to its third end, the fourth end of the first delay relay K1 is connected to the negative electrode of the solenoid valve working power supply -BB, the sixth end of the first delay relay K1 and the second delay relay K2 are connected to the positive electrode of the first rectifier diode V73, the seventh end of the first delay relay K1 is connected to the fourth end of the second delay relay K2, and the seventh end of the second delay relay K2 is connected to the delay relay action detection signal YSZS.

[0034] Take the first delay relay K1 and the first rectifier diode V73 as an example. Figure 2 As shown, in the initial stage, the third end of the first delay relay K1 is connected to the first end, and the seventh end is connected to the fifth end, so that the positive electrode +BB_DCF of the solenoid valve working power supply and the positive electrode interface DCF+ of the solenoid valve are turned on; the first, second, and third control modules are respectively connected to three groups of different solenoid valve control signals. When any group of solenoid valve control signals is valid, after the delay setting time, the third end of the first delay relay K1 is connected to the eighth end, and the seventh end is connected to the fourth end, so that the positive electrode +BB_DCF of the solenoid valve working power supply and the positive electrode interface DCF+ of the solenoid valve are disconnected, and the second end and the sixth end of the first delay relay K1 control the first rectifier diode V73 to turn on, connect the positive electrode interface DCF+ of the solenoid valve and the positive electrode +BB_DCF of the solenoid valve working power supply, and provide a holding voltage for the solenoid valve.

[0035] Furthermore, the first rectifier diode V73 and the second rectifier diode V74 are connected in parallel. Specifically, the anode of the first rectifier diode V73 is connected to the anode of the second rectifier diode V74, and the cathode of the first rectifier diode V73 is connected to the cathode of the second rectifier diode V74.

[0036] The fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tubes V77, V79 and V81 are all connected to the positive electrode of the first rectifier diode V73; the first end, the second end and the third end of the N-channel MOS tube V77 are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tube V78; the first end, the second end and the third end of the N-channel MOS tube V79 are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tube V80; the first end, the second end and the third end of the N-channel MOS tube V81 are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tube V82; the first end, the second end and the third end of the N-channel MOS tubes V78, V80 and V82 are all connected to the negative electrode -BB of the solenoid valve working power supply.

[0037] The fourth end of the N-channel MOS tube V77 is connected to the third control signal DCFK_C, and the fourth end of the N-channel MOS tube V77 is also connected to one end of the resistor R223, and the other end of the resistor R223 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0038] The fourth end of the N-channel MOS tube V78 is connected to the first control signal DCFK_A, and the fourth end of the N-channel MOS tube V78 is also connected to one end of the resistor R226, and the other end of the resistor R226 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0039] The fourth end of the N-channel MOS tube V79 is connected to the second control signal DCFK_B, and the fourth end of the N-channel MOS tube V79 is also connected to one end of the resistor R224, and the other end of the resistor R224 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0040] The fourth end of the N-channel MOS tube V80 is connected to the third control signal DCFK_C, and the fourth end of the N-channel MOS tube V80 is also connected to one end of the resistor R225, and the other end of the resistor R225 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0041] The fourth end of the N-channel MOS tube V81 is connected to the first control signal DCFK_A, and the fourth end of the N-channel MOS tube V81 is also connected to one end of the resistor R222, and the other end of the resistor R222 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0042] The fourth end of the N-channel MOS tube V82 is connected to the second control signal DCFK_B, and the fourth end of the N-channel MOS tube V82 is also connected to one end of the resistor R227, and the other end of the resistor R227 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0043] The working power supply of the solenoid valve is 28V±3V. The model of the first delay relay K1 and the second delay relay K2 can be JSB-55MP / 5S-01ⅢH, with an operating temperature of -55℃~+125℃, a volume of only 20.5mm×10.5mm×15mm, a load current of 28V / 5A, and a delay setting time of 5s±0.25s, which meets the requirements of outputting 21V~23V / 1.5A load current and delaying 5s±1s start.

[0044] The first rectifier diode V73 and the second rectifier diode V74 may be of the type ES1JFL (SOD-123FL), and are used to provide a discharge channel for the relay coil (arranged between the second end and the sixth end of the first delay relay K1).

[0045] The model of the N-channel MOS tube V77-V82 can be BSC035N10NS5. The chip size is only 5.49mm×6.35mm×1.1mm, the on-resistance is only 3.5mΩ, the maximum rated current is 100A / 100V, which meets the maximum attitude control channel 28V / 2A requirement. At the same time, the maximum start voltage is 3.8V, which meets a variety of general level voltage driving methods. The solenoid valve control signal (DCFK_A, DCFK_B, DCFK_C) output by the three modes (A mode, B mode, C mode) controls the MOS tube to realize triple redundant control of the first / second delay relay.

[0046] like Figure 2 As shown, when the working principle of the delay relay circuit is normal, the positive electrode +BB_DCF of the solenoid valve working power supply is directly connected to the positive electrode interface DCF+ of the solenoid valve to provide 28V power supply to the solenoid valve. When any two of the solenoid valve control signals output by the three modes are valid, the delay relay will act after a delay of 5s±0.25s to disconnect +BB_DCF from DCF+. At this time, DCF+ is provided with a holding voltage by +22V1 / +22V2 (the output power supply 22V of the two-way DC / DC and the anti-reverse circuit provides the holding voltage for the solenoid valve, that is, the solenoid valve holding voltage). At the same time, the delay relay action detection signal YSZS is connected to the negative electrode -BB of the solenoid valve working power supply, and is provided to the outside to detect whether the delay relay is actuated or not.

[0047] Figure 3The schematic diagram of the DC / DC and anti-reverse circuit in the solenoid valve control system based on triple redundancy. For the reliability of the circuit operation, the first DC / DC conversion circuit and the two-way DC / DC and anti-reverse circuit are designed in parallel redundancy, that is, the second DC / DC conversion circuit is connected in parallel with the first DC / DC conversion circuit, and the second ideal diode is connected in parallel with the first ideal diode.

[0048] The first ideal diode includes a first MOS tube V75 and a first ideal diode driver U5. The first DC / DC conversion circuit U3 is connected to the positive electrode +BB_DCF of the solenoid valve working power supply, and reduces the solenoid valve action voltage +28V to the solenoid valve holding voltage +22V (i.e., +22V1). The first end, the second end, and the third end of the first MOS tube V75 are all connected to the solenoid valve holding voltage +22V1, and the fourth end is connected to the fourth end (GATE) of the first ideal diode driver U5, and the fifth end, the sixth end, the seventh end, and the eighth end are connected to the solenoid valve positive electrode interface DCF+; the first end of the first ideal diode driver U5 is connected to the solenoid valve holding voltage +22V1, the fifth end is connected to the negative electrode -BB of the solenoid valve working power supply, the seventh end is connected to the first end of the capacitor C13, the second end of the capacitor C13 is connected to the negative electrode -BB of the solenoid valve working power supply, the eighth end is connected to the solenoid valve positive electrode interface DCF+, and the eighth end is also connected to one end of the resistor R42, and the other end of the resistor R42 is connected to the first end of the capacitor C13.

[0049] The second ideal diode includes a second MOS tube V76 and a second ideal diode driver U6. The second DC / DC conversion circuit U4 is connected to the positive electrode +BB_DCF of the solenoid valve working power supply, and reduces the solenoid valve action voltage +28V to the solenoid valve holding voltage +22V (i.e., +22V2). The first end, the second end, and the third end of the second MOS tube V76 are all connected to the solenoid valve holding voltage +22V2, and the fourth end is connected to the fourth end (GATE) of the second ideal diode driver U6, and the fifth end, the sixth end, the seventh end, and the eighth end are connected to the solenoid valve positive electrode interface DCF+; the first end of the second ideal diode driver U6 is connected to the solenoid valve holding voltage +22V2, the fifth end is connected to the negative electrode -BB of the solenoid valve working power supply, the seventh end is connected to the first end of the capacitor C14, the second end of the capacitor C14 is connected to the negative electrode -BB of the solenoid valve working power supply, the eighth end is connected to the solenoid valve positive electrode interface DCF+, and the eighth end is also connected to one end of the resistor R44, and the other end of the resistor R44 is connected to the first end of the capacitor C14.

[0050] Among them, the first DC / DC conversion circuit U3 and the second DC / DC conversion circuit U4 are both non-isolated DC / DC, which are used to reduce the solenoid valve action voltage +28V to the solenoid valve holding voltage +22V. The parameters of the first DC / DC conversion circuit and the second DC / DC conversion circuit are determined by the performance parameters of the solenoid valve. The model of the first DC / DC conversion circuit and the second DC / DC conversion circuit can be LTM8056MPY#PBF, the operating temperature is -55℃~+125℃, the volume size is 15mm×15mm×4.92mm, it supports 5V~58V input and 1.2V~48V output, and can output a maximum current of 4A, meeting the output 21V~23V / 1.5A load current requirements. Due to the wide input and output voltage range, the solenoid valve with working voltages such as 12V, 24V, 36V, and 48V can be adapted by flexibly selecting external resistor configuration.

[0051] Among them, the first MOS tube V75 and the second MOS tube V76 are both N-channel MOS tubes, and the model is the same as that in the delay relay circuit, that is, BSC035N10NS5. The first ideal diode driver U5 and the second ideal diode driver U6 are both ideal diode drivers, and the model can be LTC4357MPMS8#PBF, with a maximum operating voltage of 9V to 80V and an operating temperature of -55℃ to 150℃; V75 and U5, V76 and U6 form two independent ideal diodes, and the voltage drop of the ideal diode is zero, which is used to prevent reverse injection, that is, to prevent +22V1, +22V2, and +BB_DCF from reverse injection.

[0052] Figure 4 The figure is a schematic diagram of a triple redundant control circuit in a solenoid valve control system based on triple redundancy. Figure 4 As shown, the working principle of the triple redundant control circuit is basically the same as the triple redundant control in the delay relay circuit, that is, the following circuit structure is adopted: the fourth control module, the fifth control module and the sixth control module each include two N-channel MOS tubes, and a resistor connected to each N-channel MOS tube. The fourth, fifth and sixth control modules are respectively connected to three groups of different solenoid valve control signals, and any group of solenoid valve control signals is effective to control the solenoid valve to work.

[0053] Specifically, the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tubes V303, V305 and V307 are all connected to the negative electrode interface DCF- of the solenoid valve; the first end, the second end and the third end of the N-channel MOS tube V303 are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tube V304, the first end, the second end and the third end of the N-channel MOS tube V305 are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tube V306, the first end, the second end and the third end of the N-channel MOS tube V307 are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the N-channel MOS tube V308; the first end, the second end and the third end of the N-channel MOS tubes V304, V306 and V308 are all connected to the negative electrode -BB of the solenoid valve working power supply.

[0054] For the fourth control module, the fourth end of the N-channel MOS tube V303 is connected to the third control signal DCFK_C, and the fourth end of the N-channel MOS tube V303 is also connected to one end of the resistor R276, and the other end of the resistor R276 is connected to the negative electrode -BB of the solenoid valve working power supply; the fourth end of the N-channel MOS tube V304 is connected to the first control signal DCFK_A, and the fourth end of the N-channel MOS tube V304 is also connected to one end of the resistor R279, and the other end of the resistor R279 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0055] For the fifth control module, the fourth end of the N-channel MOS tube V305 is connected to the second control signal DCFK_B, and the fourth end of the N-channel MOS tube V305 is also connected to one end of the resistor R277, and the other end of the resistor R277 is connected to the negative electrode -BB of the solenoid valve working power supply; the fourth end of the N-channel MOS tube V306 is connected to the third control signal DCFK_C, and the fourth end of the N-channel MOS tube V306 is also connected to one end of the resistor R278, and the other end of the resistor R278 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0056] For the sixth control module, the fourth end of the N-channel MOS tube V307 is connected to the first control signal DCFK_A, and the fourth end of the N-channel MOS tube V307 is also connected to one end of the resistor R275, and the other end of the resistor R275 is connected to the negative electrode -BB of the solenoid valve working power supply; the fourth end of the N-channel MOS tube V308 is connected to the second control signal DCFK_B, and the fourth end of the N-channel MOS tube V308 is also connected to one end of the resistor R280, and the other end of the resistor R280 is connected to the negative electrode -BB of the solenoid valve working power supply.

[0057] The model of the N-channel MOS tube V303-V308 may be BSC035N10NS5.

[0058] The difference between the circuit structure of the triple redundant control circuit and the delay relay circuit is that: 1. The rectifier diodes V109-V112 (i.e. the first diode V109, the second diode V110, the third diode V111, and the fourth diode V112) and resistors R55-R56 (i.e. the fifty-fifth resistor and the fifty-sixth resistor) form a discharge circuit; 2. The resistors R84, R112 (i.e. the eighty-fourth resistor and the 112th resistor) and the voltage regulator tube V141 form a solenoid valve action detection circuit, which is used to connect the solenoid valve action detection signal DCFCS and provide it to the outside for detection.

[0059] Among them, the positive electrode of the first diode V109 is connected to one end of the resistor R56, the other end of the resistor R56 is connected to the negative electrode interface DCF- of the solenoid valve, the negative electrode of the first diode V109 is connected to the positive electrode of the second diode V110, and the negative electrode of the second diode V110 is connected to the positive electrode interface DCF+ of the solenoid valve.

[0060] In addition, the anode of the third diode V111 is connected to one end of the resistor R55, the other end of the resistor R55 is connected to the negative electrode interface DCF- of the solenoid valve, the cathode of the third diode V111 is connected to the anode of the fourth diode V112, and the cathode of the fourth diode V112 is connected to the positive electrode interface DCF+ of the solenoid valve.

[0061] The first end of resistor R84 is connected to the negative electrode interface DCF- of the solenoid valve, and the second end thereof is connected to the first end of resistor R112, and the second end thereof is also connected to the solenoid valve action detection signal DCFCS, and the second end of resistor R112 is connected to the negative electrode -BB of the solenoid valve working power supply; the positive electrode of the voltage regulator tube V141 is connected to the second end of resistor R112, and the negative electrode thereof is connected to the first end of resistor R112.

[0062] The working principle of the solenoid valve control system based on triple redundancy provided in this embodiment to control the on-off of the solenoid valve is as follows: after +BB_DCF is powered, the DC / DC and anti-reverse circuits start to work and output +22V1 and +22V2 respectively; when any two signals among DCFK_A, DCFK_B, and DCFK_C are valid, the triple redundant control circuit works, and at this time, the path through the solenoid valve is +BB_DCF reaching DCF+ through the delay relay, DCF+ reaching DCF- through the solenoid valve, and DCF- reaching -BB through the MOS tube, and the solenoid valve is controlled to open; at the same time, because any two signals among DCFK_A, DCFK_B, and DCFK_C are valid, the delay relay circuit also starts to work, but the first / second delay relay needs to delay 5s±0.2 It will not act until 5s later. After the delay time is reached, the first / second delay relay will act, +BB_DCF and DCF+ will be disconnected. At this time, the path through the solenoid valve is +22V1 / +22V2, which reaches DCF+ through the first / second delay relay, DCF+ reaches DCF- through the solenoid valve, and DCF- reaches -BB through the MOS tube, controlling the solenoid valve to remain connected; when the solenoid valve control signals DCFK_A, DCFK_B, and DCFK_C are revoked, the three redundant control circuits fail, the MOS tube is turned off, DCF- and -BB are disconnected, and the control solenoid valve is closed; at the same time, due to the revocation of the solenoid valve control signals DCFK_A, DCFK_B, and DCFK_C, the first / second delay relay also fails, and the first / second delay relay is disconnected to restore the initial state.

[0063] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0064] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are only regarded as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

[0065] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solenoid valve control system based on triple redundancy, characterized in that: include: A time delay relay circuit comprises a first time delay relay, a first rectifier diode, a first control module, a second control module and a third control module connected in parallel, wherein the second end of the first time delay relay is connected to the positive electrode of the electromagnetic valve working power supply and the negative electrode of the first rectifier diode, the sixth end of the first time delay relay is connected to one end of the first control module and the positive electrode of the first rectifier diode, the other end of the first control module is connected to the negative electrode of the electromagnetic valve working power supply, and the first end of the first time delay relay is connected to one end of the electromagnetic valve; the first, second and third control modules are respectively connected to three groups of different electromagnetic valve control signals, and any group of electromagnetic valve control signals is effective to control the first time delay relay to work; The DC / DC and anti-reverse circuit comprises a first DC / DC conversion circuit and a first ideal diode, wherein one end of the first DC / DC conversion circuit is connected to the positive electrode of the power supply, and the other end thereof is connected to one end of the first ideal diode, and the other end of the first ideal diode is connected to one end of the solenoid valve; A triple redundant control circuit comprises a fourth control module, a fifth control module and a sixth control module connected in parallel, wherein one end of the fourth control module is connected to the negative pole of the power supply, and the other end thereof is connected to the other end of the solenoid valve; the fourth, fifth and sixth control modules are respectively connected to three groups of different solenoid valve control signals, and any group of solenoid valve control signals can effectively control the operation of the solenoid valve; and the fourth control module and the first control module have the same circuit structure and the connected solenoid valve control signal, the fifth control module and the second control module have the same circuit structure and the connected solenoid valve control signal, and the sixth control module and the third control module have the same circuit structure and the connected solenoid valve control signal.

2. The solenoid valve control system based on triple redundancy as claimed in claim 1, characterized in that: The first control module, the second control module and the third control module each include two N-channel MOS tubes and a resistor connected to each N-channel MOS tube. The three groups of different solenoid valve control signals are obtained by combining the first control signal, the second control signal and the third control signal in pairs.

3. The solenoid valve control system based on triple redundancy as claimed in claim 2, characterized in that: The first control module includes a first N-channel MOS transistor, a first resistor, a second N-channel MOS transistor and a second resistor, wherein the fourth end of the first N-channel MOS transistor is connected to the third control signal and one end of the first resistor, and the other end of the first resistor is connected to the negative electrode of the power supply; the fourth end of the second N-channel MOS transistor is connected to the first control signal and one end of the second resistor, and the other end of the second resistor is connected to the negative electrode of the power supply; The first end, the second end, and the third end of the first N-channel MOS tube are all connected to the fifth end, the sixth end, the seventh end, and the eighth end of the second N-channel MOS tube, and the first end, the second end, and the third end of the second N-channel MOS tube are all connected to the negative electrode of the power supply.

4. The solenoid valve control system based on triple redundancy as claimed in claim 2, characterized in that: The second control module includes a third N-channel MOS transistor, a third resistor, a fourth N-channel MOS transistor and a fourth resistor, wherein a fourth end of the third N-channel MOS transistor is connected to the second control signal and one end of the third resistor, and the other end of the third resistor is connected to the negative electrode of the power supply; a fourth end of the fourth N-channel MOS transistor is connected to the third control signal and one end of the fourth resistor, and the other end of the fourth resistor is connected to the negative electrode of the power supply; The first end, the second end and the third end of the third N-channel MOS tube are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the fourth N-channel MOS tube, and the first end, the second end and the third end of the fourth N-channel MOS tube are all connected to the negative electrode of the power supply.

5. The solenoid valve control system based on triple redundancy as claimed in claim 2, characterized in that: The third control module includes a fifth N-channel MOS transistor, a fifth resistor, a sixth N-channel MOS transistor and a sixth resistor, wherein the fourth end of the fifth N-channel MOS transistor is connected to the first control signal and one end of the fifth resistor, and the other end of the fifth resistor is connected to the negative electrode of the power supply; the fourth end of the sixth N-channel MOS transistor is connected to the second control signal and one end of the sixth resistor, and the other end of the sixth resistor is connected to the negative electrode of the power supply; The first end, the second end and the third end of the fifth N-channel MOS tube are all connected to the fifth end, the sixth end, the seventh end and the eighth end of the sixth N-channel MOS tube, and the first end, the second end and the third end of the sixth N-channel MOS tube are all connected to the negative electrode of the power supply.

6. The solenoid valve control system based on triple redundancy as claimed in claim 1, characterized in that: The first ideal diode includes a first MOS tube and a first ideal diode driver. The first DC / DC conversion circuit is connected to the positive electrode of the power supply and is used to convert the solenoid valve action voltage into the solenoid valve holding voltage; the first end, the second end, and the third end of the first MOS tube are all connected to the solenoid valve holding voltage, and the fourth end is connected to the fourth end of the first ideal diode driver, and the fifth end, the sixth end, the seventh end, and the eighth end are all connected to one end of the solenoid valve; the first end of the first ideal diode driver is connected to the solenoid valve holding voltage, the fifth end is connected to the negative electrode of the power supply, the seventh end is connected to the negative electrode of the power supply through a capacitor, and the eighth end is connected to one end of the solenoid valve.

7. The solenoid valve control system based on triple redundancy as claimed in claim 1, characterized in that: The time delay relay circuit further includes a second time delay relay and a second rectifier diode. The second time delay relay is connected in parallel with the first time delay relay, and the second rectifier diode is connected in parallel with the first rectifier diode.

8. The solenoid valve control system based on triple redundancy as claimed in claim 1, characterized in that: The DC / DC and anti-reverse circuit also includes a second DC / DC conversion circuit and a second ideal diode. The second DC / DC conversion circuit is connected in parallel with the first DC / DC conversion circuit, and the second ideal diode is connected in parallel with the first ideal diode.

9. The solenoid valve control system based on triple redundancy as claimed in claim 1, characterized in that: The triple redundant control circuit further includes a discharge circuit, and the discharge circuit includes a first diode, a second diode, a third diode, a fourth diode, a fifty-fifth resistor, and a fifty-sixth resistor, wherein: The anode of the first diode is connected to one end of the fifty-sixth resistor, the other end of the fifty-sixth resistor is connected to the cathode interface of the solenoid valve, the cathode of the first diode is connected to the anode of the second diode, and the cathode of the second diode is connected to the cathode interface of the solenoid valve; The anode of the third diode is connected to one end of the fifty-fifth resistor, and the other end of the fifty-fifth resistor is connected to the cathode interface of the solenoid valve. The cathode of the third diode is connected to the anode of the fourth diode, and the cathode of the fourth diode is connected to the cathode interface of the solenoid valve.

10. The solenoid valve control system based on triple redundancy as claimed in claim 9, characterized in that: The triple redundant control circuit further includes a solenoid valve action detection circuit, and the solenoid valve action detection circuit includes an eighty-fourth resistor, a first one-two resistor and a voltage regulator tube, wherein: The first end of the 84th resistor is connected to the negative electrode interface of the solenoid valve, and its second end is connected to the first end of the 112th resistor, and its second end is also connected to the solenoid valve action detection signal; the second end of the 112th resistor is connected to the negative electrode of the power supply; the positive electrode of the Zener diode is connected to the second end of the 112th resistor, and its negative electrode is connected to the first end of the 112th resistor.

Images