Igniter control equipment

Abstract

The utility model relates to an igniter control apparatus. The igniter control equipment comprises an activation isolation power supply module, a working isolation power supply module, a CAN circuit, a processor module, an activation control module, a temperature acquisition module and a temperature sensor, the activation control module comprises a one-out-of-multiple matrix circuit; the control end of the activation isolation power supply module is connected with the processor module, the CAN circuit, the activation control module and the temperature acquisition module are all connected with the processor module, and the temperature acquisition module is connected with the temperature sensor; the activation control module is connected with an external igniter; the igniter control equipment is connected with the upper computer through a CAN bus; the activation isolation power supply module is used for supplying power to an external igniter; and the working isolation power supply module is used for supplying power to the processor module, the temperature acquisition module and the CAN circuit. The equipment realizes electrical isolation of an input power supply, a system power supply and an igniter power supply, and also realizes control of more igniters under the condition of saving hardware interface resources.

Description

Technical Field

[0001] The present application relates to the technical field of igniters, and in particular to an igniter control device. Background Art

[0002] The igniter covers the entire process from engine startup to stable operation, which is divided into the ignition phase, the ignition charge gas phase, and the main charge ignition phase. The igniter generally consists of an ignition circuit, a bridge wire, a thermal propellant, an ignition charge bag, and a fire transmission channel. During the ignition phase, when the power is turned on, the igniter generates a predetermined current to heat the bridge wire. The thermal propellant coated on the bridge wire ignites and ignites the ignition charge. The ignition charge then generates a high-temperature, incandescent particle stream that is ejected from the nozzle for a specified period of time, igniting the engine charge.

[0003] Ignitors must be instantaneous, highly safe, and highly reliable. Ignitor designs typically feature two independent ignition circuits and wiring, with parallel design structures and independent electrical connections for safe and reliable ignition. Furthermore, the igniter's practical components must ensure safety and structural integrity in harsh environments, and the ignition element must be anti-static and radio frequency resistant.

[0004] Current igniters typically operate in parallel with multiple ignition paths, firing according to a specific ignition sequence. Given the large number of paths, if each igniter were equipped with its own ignition and control circuits, the system's size, weight, and complexity would increase dramatically, along with its cost. There is a need for a compact, lightweight, low-cost, and reliable ignition control system to achieve multi-path ignition. Utility Model Content

[0005] Based on this, it is necessary to provide an igniter control device to address the above technical problems.

[0006] An igniter control device includes: an activation isolation power supply module, a working isolation power supply module, a CAN circuit, a processor module, an activation control module, a temperature acquisition module and a temperature sensor; the activation control module includes a multiple-choice matrix circuit.

[0007] The control end of the activation isolation power module is connected to the processor module, the CAN circuit, the activation control module and the temperature acquisition module are all connected to the processor module, the temperature acquisition module is connected to the temperature sensor; the activation control module is connected to the external igniter.

[0008] The ignition control device is connected to the host computer via the CAN bus.

[0009] Activate the isolated power supply module to power the external igniter.

[0010] The working isolated power supply module is used to provide power for the processor module, temperature acquisition module, and CAN circuit.

[0011] In one embodiment, the activated isolated power supply module includes a DC24V to DC24V isolated power supply.

[0012] In one embodiment, the working isolated power supply module includes a DC24V to DC5V isolated power supply.

[0013] In one embodiment, the CAN circuit includes a CAN driver chip, a communication isolation optocoupler, and a DC-DC isolation power supply module.

[0014] The CAN driver chip is connected to the communication isolation optocoupler, the communication isolation optocoupler is connected to the processor module, the CAN driver chip is connected to the host computer through the CAN bus, the input end of the DC-DC isolation power supply module is connected to the output end of the working isolation power supply module, and the output end of the DC-DC isolation power supply module is connected to the power supply end of the CAN driver chip.

[0015] In one embodiment, the activation control module further includes an activation power supply and test power supply switching submodule, a source driver, a pull-down driver, a plurality of PMOS transistors, a plurality of NMOS transistors, a plurality of gate drivers, a serial current resistor acquisition submodule, and a sampling resistor switching submodule; the number of PMOS transistors is the same as the number of columns of the matrix circuit, and the number of NMOS transistors is the same as the number of rows of the matrix circuit.

[0016] The input end of the activation power supply and test power supply switching submodule is connected to the processor module, the input end of the source driver and the drains of all PMOS tubes are connected to the output end of the activation power supply and test power supply switching submodule, the gate of each PMOS tube is connected to a gate driver, each output end of the source driver is connected to a column protection line, and the source of each PMOS tube switch is respectively connected to a column control line of the matrix circuit.

[0017] The pull-down driver is connected to the output end of the activation power supply and test power supply switching submodule, the gate of each NMOS tube is connected to a gate driver, each output end of the pull-down driver is connected to a row protection line, the drain of each NMOS tube is connected to a row control line of the matrix circuit, the source of all NMOS tube switches is connected to one end of the sampling resistor, the other end of the sampling resistor is grounded, and the serial current resistor acquisition submodule and the sampling resistor switching submodule are both connected in parallel with the sampling resistor.

[0018] In one embodiment, the matrix circuit includes 35 relays; the relays are normally closed relays;

[0019] One end of the normally closed contact of the first relay is connected to the first end of the first two-terminal socket, and the other ends of the two normally closed contacts of the normally closed relay are connected together and connected to the second end of the first two-terminal socket; the normally closed contacts of the other relays are connected to the corresponding two-terminal sockets in the same manner as the normally closed contacts of the first relay are connected to the two-terminal sockets;

[0020] The positive ends of the control coils of the first to seventh relays are connected to the first output terminal of the source driver; the positive ends of the control coils of the eighth to fourteenth relays are connected to the second output terminal of the source driver; the positive ends of the control coils of the fifteenth to twenty-first relays are connected to the third output terminal of the source driver; the positive ends of the control coils of the twenty-second to twenty-eighth relays are connected to the fourth output terminal of the source driver, and the positive ends of the control coils of the twenty-ninth to thirty-fifth relays are connected to the fifth output terminal of the source driver.

[0021] the negative terminals of the control coils of the first, eighth, fifteenth, twenty-second, and twenty-ninth relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the second, ninth, sixteenth, twenty-third, and thirtieth relays are all connected to the second output terminal of the pull-down driver; the negative terminals of the control coils of the third, tenth, seventeenth, twenty-fourth, and thirty-first relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the fourth, eleventh, eighteenth, twenty-fifth, and thirty-second relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the fifth, twelfth, nineteenth, twenty-sixth, and thirty-third relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the sixth, thirteenth, twentieth, twenty-seventh, and thirty-fourth relays are all connected to the first output terminal of the pull-down driver; and the negative terminals of the control coils of the seventh, fourteenth, twenty-first, twenty-eighth, and thirty-fifth relays are all connected to the first output terminal of the pull-down driver;

[0022] One end of the first to seventh two-terminal sockets is connected to the source of the first PMOS tube, one end of the eighth to fourteenth two-terminal sockets is connected to the source of the second PMOS tube, one end of the fifteenth to twenty-first two-terminal sockets is connected to the source of the third PMOS tube, one end of the twenty-second to twenty-eighth two-terminal sockets is connected to the source of the fourth PMOS tube, and one end of the twenty-ninth to thirty-fifth two-terminal sockets is connected to the source of the fifth PMOS tube.

[0023] The other ends of the first, eighth, fifteenth, twenty-second and twenty-ninth two-terminal sockets are connected to the source of the first NMOS tube, the other ends of the second, ninth, sixteenth, twenty-third and thirtieth two-terminal sockets are connected to the source of the second NMOS tube, the other ends of the third, tenth, seventeenth, twenty-fourth and thirty-first two-terminal sockets are connected to the source of the third PMOS tube, the other ends of the fourth, eleventh, eighteenth, twenty-fifth and thirty-second two-terminal sockets are connected to the source of the fourth NMOS tube, the other ends of the fifth, twelfth, nineteenth, twenty-sixth and thirty-third two-terminal sockets are connected to the source of the fifth NMOS tube, the other ends of the sixth, thirteenth, twentieth, twenty-seventh and thirty-fourth two-terminal sockets are connected to the source of the sixth NMOS tube, and the other ends of the seventh, fourteenth, twenty-first, twenty-eighth and thirty-fifth two-terminal sockets are connected to the source of the seventh NMOS tube; each two-terminal socket is connected to an igniter.

[0024] In one embodiment, the source driver is an 8-channel source driver HT62783A.

[0025] In one embodiment, the pull-down driver is an 8-channel pull-down driver HT62003A.

[0026] In one embodiment, the temperature acquisition module includes: a power isolation module and an isolation amplifier.

[0027] The input end of the power isolation module is connected to the output end of the working isolation power module, the output end of the power isolation module is connected to the isolation amplifier, the input end of the isolation amplifier is connected to the output end of the temperature sensor, and the output end of the isolation amplifier is connected to the ADC port of the processor module.

[0028] The aforementioned igniter control device includes: an activation isolation power module, a working isolation power module, a CAN circuit, a processor module, an activation control module, a temperature acquisition module, and a temperature sensor; the activation control module includes a multiple-choice matrix circuit; the control end of the activation isolation power module is connected to the processor module, the CAN circuit, the activation control module, and the temperature acquisition module are all connected to the processor module, and the temperature acquisition module is connected to the temperature sensor; the activation control module is connected to an external igniter; the igniter control device is connected to a host computer via a CAN bus; the activation isolation power module is used to power the external igniter; and the working isolation power module is used to provide power to the processor module, the temperature acquisition module, and the CAN circuit. This device can achieve electrical isolation of the input power from the system power supply and the igniter power supply, and can also control more igniters while saving hardware interface resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A structural block diagram of an igniter control device in one embodiment;

[0030] Figure 2 A block diagram of activating an isolated power supply module in another embodiment;

[0031] Figure 3 A block diagram of a working isolated power supply module in another embodiment;

[0032] Figure 4 A partial circuit connection diagram of a matrix in another embodiment;

[0033] Figure 5 It is a functional block diagram of an activation control module in another embodiment;

[0034] Figure 6 This is a block diagram of the temperature acquisition module in another embodiment. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0036] In one embodiment, Figure 1 As shown, an igniter control device is provided, which includes: an activation isolation power supply module 10, a working isolation power supply module 20, a CAN circuit 30, a processor module 40, an activation control module 50, a temperature acquisition module 60 and a temperature sensor 70; the activation control module 50 includes a multiple-selection matrix circuit.

[0037] The control end of the activation isolation power supply module 10 is connected to the processor module 40, the CAN circuit 30, the activation control module 50 and the temperature acquisition module 60 are all connected to the processor module 40, the temperature acquisition module 60 is connected to the temperature sensor 70; the activation control module 50 is connected to the external igniter.

[0038] The ignition control device is connected to the host computer via the CAN bus.

[0039] Activate the isolated power supply module 10 to power the external igniter.

[0040] The working isolated power supply module 20 is used to provide power to the processor module 40 , the temperature acquisition module 60 , and the CAN circuit 30 .

[0041] Specifically, the controller device provides five external interfaces: power supply, CAN communication, output, and two temperature sensor interfaces. The power supply interface includes a working power supply (DC5V, 6A) and an activation power supply (DC24V, 8-14A). Both power inputs are isolated to ensure internal circuits are isolated from external devices. The output interface includes 35 activation outputs, implemented using a 12-channel MOS transistor (MOSFET) with a capacity of 10A or greater to control a multiple-select matrix. The switching timing of the 12 MOS transistors is controlled by the relationship between the operating timing stored within the processor and the current temperature. Shielding measures are implemented on all 35 interfaces to prevent interference between channels.

[0042] Activate the isolated power supply module 10 to supply power to the external igniter, realize the electrical isolation of the input power and the igniter power, and provide a remote control signal to realize the protection function. Before receiving the release instruction, the power output is closed by default. Figure 2 shown.

[0043] The working isolation power supply module 20 supplies power to the processor module 40, the temperature acquisition module 60, and the CAN circuit 30, realizing electrical isolation of the input power supply and the system power supply. Figure 3 shown.

[0044] The ignition control device realizes two-way communication with the host computer through the CAN communication interface, and the processor module can save the loading configuration of the debugging and activation sequence.

[0045] Processor module 40 uses a domestically produced DSP28335. The controller needs to support timing control for 12 matrix igniters, abnormality detection for two matrix igniters, and short-circuit protection for 12 matrix igniters. Therefore, the processor requires two ADCs (one to test the activation power supply voltage and one to serially read the open, short, or normal status of each of the 35 matrix igniters) and 30 GPIO hardware functions. Using a single DSP28335 can meet these requirements.

[0046] The activation control module 50 primarily implements three functions: 35-way matrix ignition timing control, 35-way matrix igniter protection and release status control, and 35-way matrix igniter status detection. The activation control portion utilizes a matrix control method, selecting one igniter from 35. Matrix activation is easy to implement and offers stability and reliability. Furthermore, by using a separate matrix for protection and release (combining the two matrices into one, known as a dual matrix), this dual protection improves stability. The matrix format significantly reduces GPIO port usage and provides high speed, a significant advantage when the number of igniters is large (e.g., 100).

[0047] The main function of the temperature acquisition module 60 is to collect the 4-20mA current signal of the two temperature sensors, convert it into a voltage signal and send it to the auxiliary processor to collect the current temperature value, and through the pre-configured logic, determine the temperature and select the appropriate ignition timing.

[0048] The functional block diagram of the ignition control device is as follows: Figure 1 The activation power supply is supplied to the activation channel part of the 5×7 matrix through the isolated power supply module, the working power supply is supplied to the logic processing part of the controller through the isolated power supply module, the CAN communication unit is isolated by the optical coupler, and the temperature acquisition circuit is isolated by the isolation amplifier.

[0049] The working principle and working process of the ignition control device are as follows:

[0050] The igniter control device stores multiple activation sequences internally. The main function of the igniter control device is to monitor the ambient temperature, receive circuit inspection instructions and release instructions from the host computer, automatically select the activation sequence according to the temperature, and activate the front-end igniter through multiple channels in sequence.

[0051] The igniter control device has three basic functions. The first is to serve as the control actuator of the entire system to realize the protection, inspection and activation of the front-end igniter. The second is to perform normal self-inspection after the controller is powered on and to connect with the upper integrated controller according to the predetermined data communication protocol. The third is to send its own status monitoring data to the parameter measurement component of the upper control system through the communication link after the controller is powered on.

[0052] To save components and costs while improving efficiency and reliability, the igniter control device uses a control matrix for activation control and activation circuit protection. The activation matrix consists of two nested matrices. When a row of cells is activated, the cells in other rows are disconnected. Similarly, when a column of cells is activated, the cells in other columns are disconnected. This ensures activation reliability and prevents false triggering and multiple triggering.

[0053] The control matrix primarily implements three functions (using a 5×7 matrix as an example): 35-channel matrix activation sequence control, 35-channel matrix igniter protection and release status control, and 35-channel matrix activation circuit status detection. The activation control method utilizes a 35-choose-1 matrix control method. Matrix control is easy to implement and offers stability and reliability. Furthermore, by combining protection and release with a separate matrix (two matrices in one, called a dual matrix), dual protection improves stability. The matrix format significantly reduces GPIO usage and provides high speed, a significant advantage when the number of activation units is large.

[0054] In order to adapt to the harsh working environment, the ignition control device of the present application adopts DSP as the core computing unit and takes electrical isolation measures for the input, output and internal parts of the controller.

[0055] The aforementioned igniter control device includes: an activation isolation power module, a working isolation power module, a CAN circuit, a processor module, an activation control module, a temperature acquisition module, and a temperature sensor. The activation control module includes a 5×7 matrix circuit. The control end of the activation isolation power module is connected to the processor module, while the CAN circuit, the activation control module, and the temperature acquisition module are all connected to the processor module, and the temperature acquisition module is connected to the temperature sensor. The activation control module is connected to an external igniter. The igniter control device is connected to a host computer via a CAN bus. The activation isolation power module is used to power the external igniter, while the working isolation power module is used to power the processor module, the temperature acquisition module, and the CAN circuit. This device electrically isolates the input power from the system power supply and the igniter power supply. Furthermore, it can control more igniters while conserving hardware interface resources.

[0056] In one embodiment, the activated isolated power supply module includes a DC24V to DC24V isolated power supply.

[0057] As a preferred option, the activation isolation power module uses Jinshengyang's VRB2424HB-350WR3. This power module is a DC24V to DC24V isolated power supply with an output power of up to 350W and an isolation voltage of up to 1500V. It meets the wide operating temperature range of -40℃~+100℃ and has internal output voltage protection, short circuit protection, overcurrent protection and over-temperature protection.

[0058] In one embodiment, the working isolated power supply module includes a DC24V to DC5V isolated power supply.

[0059] As a preferred working isolated power supply module, Jinshengyang's URB2405YMD-30WR3G is selected. This power supply module is a DC24V to DC5V isolated power supply with an output power of up to 30W and an isolation voltage of up to 1500V. It meets the wide operating temperature range of -40℃~+105℃ and has internal output voltage protection, short circuit protection, overcurrent protection and overtemperature protection.

[0060] In one embodiment, the CAN circuit includes a CAN driver chip, a communication isolation optocoupler, and a DC-DC isolation power supply module.

[0061] The CAN driver chip is connected to the communication isolation optocoupler, the communication isolation optocoupler is connected to the processor module, the CAN driver chip is connected to the host computer through the CAN bus, the input end of the DC-DC isolation power supply module is connected to the output end of the working isolation power supply module, and the output end of the DC-DC isolation power supply module is connected to the power supply end of the CAN driver chip.

[0062] As a preferred choice, the CAN circuit uses SIT1057, which has short-circuit output protection function, integrated transient voltage suppression function, a transmission rate of up to 5Mbps, port electrostatic protection of up to ±40KV, and an operating temperature range of -40℃~+150℃.

[0063] The communication isolation optocoupler uses the high-speed optocoupler 6N137, which can support a maximum communication rate of 10Mbps and meet the wide operating temperature range of -40℃~+85℃.

[0064] The DC-DC isolated power module uses B0505S-2WR3, which provides continuous short-circuit protection, an operating temperature range of -40°C to +105°C, and an isolation voltage of up to 1500V.

[0065] In one embodiment, the activation control module further includes an activation power supply and test power supply switching submodule, a source driver, a pull-down driver, a plurality of PMOS transistors, a plurality of NMOS transistors, a plurality of gate drivers, a serial current resistor acquisition submodule, and a sampling resistor switching submodule; the number of PMOS transistors is the same as the number of columns of the matrix circuit, and the number of NMOS transistors is the same as the number of rows of the matrix circuit.

[0066] The input end of the activation power supply and test power supply switching submodule is connected to the processor module, the input end of the source driver and the drains of all PMOS tubes are connected to the output end of the activation power supply and test power supply switching submodule, the gate of each PMOS tube is connected to a gate driver, each output end of the source driver is connected to a column protection line, and the source of each PMOS tube switch is respectively connected to a column control line of the matrix circuit.

[0067] The pull-down driver is connected to the output end of the activation power supply and test power supply switching submodule, the gate of each NMOS tube is connected to a gate driver, each output end of the pull-down driver is connected to a row protection line, the drain of each NMOS tube is connected to a row control line of the matrix circuit, the source of all NMOS tube switches is connected to one end of the sampling resistor, the other end of the sampling resistor is grounded, and the serial current resistor acquisition submodule and the sampling resistor switching submodule are both connected in parallel with the sampling resistor.

[0068] In one embodiment, the matrix circuit includes 35 relays; the relays are normally closed relays;

[0069] like Figure 4 As shown, one end of the normally closed contact of the first relay (pin 6) is connected to the first end of the first two-terminal socket H1, and the other ends of the two normally closed contacts of the normally closed relay (pin 7 and pin 2) are connected together and connected to the second end of the first two-terminal socket H1. The connection method between the normally closed contacts of the other relays and the corresponding two-terminal sockets is the same as the connection method between the normally closed contacts of the first relay and the two-terminal sockets.

[0070] The positive ends of the control coils of the first to seventh relays are connected to the first output terminal of the source driver; the positive ends of the control coils of the eighth to fourteenth relays are connected to the second output terminal of the source driver; the positive ends of the control coils of the fifteenth to twenty-first relays are connected to the third output terminal of the source driver; the positive ends of the control coils of the twenty-second to twenty-eighth relays are connected to the fourth output terminal of the source driver, and the positive ends of the control coils of the twenty-ninth to thirty-fifth relays are connected to the fifth output terminal of the source driver.

[0071] the negative terminals of the control coils of the first, eighth, fifteenth, twenty-second, and twenty-ninth relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the second, ninth, sixteenth, twenty-third, and thirtieth relays are all connected to the second output terminal of the pull-down driver; the negative terminals of the control coils of the third, tenth, seventeenth, twenty-fourth, and thirty-first relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the fourth, eleventh, eighteenth, twenty-fifth, and thirty-second relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the fifth, twelfth, nineteenth, twenty-sixth, and thirty-third relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the sixth, thirteenth, twentieth, twenty-seventh, and thirty-fourth relays are all connected to the first output terminal of the pull-down driver; and the negative terminals of the control coils of the seventh, fourteenth, twenty-first, twenty-eighth, and thirty-fifth relays are all connected to the first output terminal of the pull-down driver;

[0072] One end of the first to seventh two-terminal sockets is connected to the source of the first PMOS tube, one end of the eighth to fourteenth two-terminal sockets is connected to the source of the second PMOS tube, one end of the fifteenth to twenty-first two-terminal sockets is connected to the source of the third PMOS tube, one end of the twenty-second to twenty-eighth two-terminal sockets is connected to the source of the fourth PMOS tube, and one end of the twenty-ninth to thirty-fifth two-terminal sockets is connected to the source of the fifth PMOS tube.

[0073] The other ends of the first, eighth, fifteenth, twenty-second and twenty-ninth two-terminal sockets are connected to the source of the first NMOS tube, the other ends of the second, ninth, sixteenth, twenty-third and thirtieth two-terminal sockets are connected to the source of the second NMOS tube, the other ends of the third, tenth, seventeenth, twenty-fourth and thirty-first two-terminal sockets are connected to the source of the third PMOS tube, the other ends of the fourth, eleventh, eighteenth, twenty-fifth and thirty-second two-terminal sockets are connected to the source of the fourth NMOS tube, the other ends of the fifth, twelfth, nineteenth, twenty-sixth and thirty-third two-terminal sockets are connected to the source of the fifth NMOS tube, the other ends of the sixth, thirteenth, twentieth, twenty-seventh and thirty-fourth two-terminal sockets are connected to the source of the sixth NMOS tube, and the other ends of the seventh, fourteenth, twenty-first, twenty-eighth and thirty-fifth two-terminal sockets are connected to the source of the seventh NMOS tube; each two-terminal socket is connected to an igniter.

[0074] Specifically, for 35-way ignition timing control, since the equipment requires a timing error accuracy of less than 1ms, traditional mechanical relays can no longer meet the requirements. In this application, the ignition switch uses a P-type MOS tube as the power supply switch for the igniter. As a preferred choice, the P-type MOS tube is YJB30GP10A. This device has an operating temperature range of -55℃~+150℃ and a maximum drain current of 30A, meeting the equipment requirement of more than 4A. The device has a junction capacitance of 2.1nF and a maximum switching frequency of 1MHz, meeting the 1ms timing error accuracy requirement.

[0075] 35-way igniter protection and release status control. The igniter requires a short circuit before the protection is released, so a normally closed relay is used for control. Before the protection is released, the relay short-circuits the two lines of the igniter. After receiving the release information, the relay circuit is disconnected. Since the relay only performs short-circuit control and does not pass current, HF32FV-G can be selected. The operating temperature range of this relay is -40℃~+85℃.

[0076] The matrix controls the HF32FV-G relays using N-type IRF3710 MOSFETs. Because reliable power MOSFETs require sufficient drive current and safe isolation from the pre-stage controller, twelve SLM345 gate drive optocouplers are used. The drive voltage for the 35 relays comes from a 5V isolated power supply (at most one relay can be energized at a time), so isolation is not required because the relays already have isolation capabilities.

[0077] like Figure 4As shown, the connection between the protection matrix and the control matrix is ​​illustrated using the first relay in the matrix as an example. The source output line of the first PMOS transistor serves as the row control line, and the first terminal of the first two-terminal socket H1 is connected to the row control line. The source output line of the first NMOS transistor serves as the column control line, and the second terminal of the first two-terminal socket H1 is connected to the column control line. The first output terminal of the source driver U16 serves as the row protection line, and the first differential terminal of the pull-type driver U17 serves as the column protection line. The positive terminal of the control coil of the first relay is connected to the row protection line, and the negative terminal of the control coil of the first relay is connected to the column protection line.

[0078] Figure 5 Shown is a functional block diagram of an activation control module including a 5×3 matrix.

[0079] The relay is a key component in the activation control module. Each ignition control has a relay. The relay is connected first, and then the ignition is activated. A relay is also used in the protection check circuit.

[0080] In one embodiment, the source driver is an 8-channel source driver HT62783A.

[0081] In one embodiment, the pull-down driver is an 8-channel pull-down driver HT62003A.

[0082] In one embodiment, Figure 6 As shown, the temperature acquisition module includes: a power isolation module and an isolation amplifier.

[0083] The input end of the power isolation module is connected to the output end of the working isolation power module, the output end of the power isolation module is connected to the isolation amplifier, the input end of the isolation amplifier is connected to the output end of the temperature sensor, and the output end of the isolation amplifier is connected to the ADC port of the processor module.

[0084] Specifically, the 35-channel igniter matrix status detection is achieved by controlling the 5×7 matrix to apply a small voltage to each ignition circuit, extracting the current information on the fixed resistor for detection. A CA-IS1200G isolation amplifier chip collects the voltage signal and outputs it to the processor's AD input port. The resistance value of each channel is calculated through conversion. This chip has an operating temperature range of -40°C to +125°C.

[0085] The temperature acquisition module collects data from two temperature sensors (with an accuracy of 0.5°C) to detect the ambient temperature, upload it to the host computer, and use it as the basis for selecting the activation sequence. Implementation: The igniter control device collects the current value of the temperature sensors through two 4-20mA interfaces and calculates the actual temperature based on the temperature sensor's conversion method. It also performs temperature compensation based on the actual temperature comparison to achieve the required accuracy of 0.5°C. The controller communicates with the host computer via the CAN interface and reports the converted and compensated actual temperature value to the host computer according to the upload rules.

[0086] The technical features of the above embodiments can be combined arbitrarily. 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.

[0087] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An igniter control device, characterized in that: The igniter control device includes: an activation isolation power supply module, a working isolation power supply module, a CAN circuit, a processor module, an activation control module, a temperature acquisition module and a temperature sensor; the activation control module includes a multiple-choice matrix circuit; The control end of the activation isolation power supply module is connected to the processor module, the CAN circuit, the activation control module and the temperature acquisition module are all connected to the processor module, the temperature acquisition module is connected to the temperature sensor; the activation control module is connected to an external igniter; The ignition control device is connected to the host computer via a CAN bus; The activated isolated power supply module is used to supply power to the external igniter; The working isolated power supply module is used to provide power for the processor module, the temperature acquisition module, and the CAN circuit.

2. The igniter control device according to claim 1, characterized in that The activated isolated power supply module includes a DC24V to DC24V isolated power supply.

3. The igniter control device according to claim 1, characterized in that The working isolated power supply module includes a DC24V to DC5V isolated power supply.

4. The igniter control device according to claim 1, characterized in that The CAN circuit includes a CAN driver chip, a communication isolation optocoupler, and a DC-DC isolation power supply module; The CAN driver chip is connected to the communication isolation optocoupler, the communication isolation optocoupler is connected to the processor module, the CAN driver chip is connected to the host computer through the CAN bus, the input end of the DC-DC isolation power supply module is connected to the output end of the working isolation power supply module, and the output end of the DC-DC isolation power supply module is connected to the power supply end of the CAN driver chip.

5. The igniter control device according to claim 1, characterized in that The activation control module further includes an activation power supply and test power supply switching submodule, a source driver, a pull-down driver, a plurality of PMOS transistors, a plurality of NMOS transistors, a plurality of gate drivers, a serial current resistance acquisition submodule, and a sampling resistance switching submodule; the number of the PMOS transistors is the same as the number of columns of the matrix circuit, and the number of the NMOS transistors is the same as the number of rows of the matrix circuit; The input end of the activation power supply and test power supply switching submodule is connected to the processor module, the input end of the source driver and the drains of all PMOS tubes are connected to the output end of the activation power supply and test power supply switching submodule, the gate of each PMOS tube is connected to a gate driver, each output end of the source driver is connected to a column protection line, and the source of each PMOS tube switch is respectively connected to a column control line of the matrix circuit; The pull-down driver is connected to the output end of the activation power supply and test power supply switching submodule, the gate of each NMOS tube is connected to a gate driver, each output end of the pull-down driver is connected to a row protection line, the drain of each NMOS tube is connected to a row control line of the matrix circuit, the source of all NMOS tube switches is connected to one end of the sampling resistor, the other end of the sampling resistor is grounded, and the serial current resistor acquisition submodule and the sampling resistor switching submodule are both connected in parallel with the sampling resistor.

6. The igniter control device according to claim 5, characterized in that The matrix circuit includes 35 relays; the relays are normally closed relays; One end of the normally closed contact of the first relay is connected to the first end of the first two-terminal socket, and the other ends of the two normally closed contacts of the normally closed relay are connected together and connected to the second end of the first two-terminal socket; the normally closed contacts of the other relays are connected to the corresponding two-terminal sockets in the same manner as the normally closed contacts of the first relay are connected to the two-terminal sockets; The positive terminals of the control coils of the first to seventh relays are connected to the first output terminal of the source driver; the positive terminals of the control coils of the eighth to fourteenth relays are connected to the second output terminal of the source driver; the positive terminals of the control coils of the fifteenth to twenty-first relays are connected to the third output terminal of the source driver; the positive terminals of the control coils of the twenty-second to twenty-eighth relays are connected to the fourth output terminal of the source driver, and the positive terminals of the control coils of the twenty-ninth to thirty-fifth relays are connected to the fifth output terminal of the source driver; the negative terminals of the control coils of the first, eighth, fifteenth, twenty-second, and twenty-ninth relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the second, ninth, sixteenth, twenty-third, and thirtieth relays are all connected to the second output terminal of the pull-down driver; the negative terminals of the control coils of the third, tenth, seventeenth, twenty-fourth, and thirty-first relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the fourth, eleventh, eighteenth, twenty-fifth, and thirty-second relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the fifth, twelfth, nineteenth, twenty-sixth, and thirty-third relays are all connected to the first output terminal of the pull-down driver; the negative terminals of the control coils of the sixth, thirteenth, twentieth, twenty-seventh, and thirty-fourth relays are all connected to the first output terminal of the pull-down driver; and the negative terminals of the control coils of the seventh, fourteenth, twenty-first, twenty-eighth, and thirty-fifth relays are all connected to the first output terminal of the pull-down driver; One end of the first to seventh two-terminal sockets is connected to the source of the first PMOS transistor, one end of the eighth to fourteenth two-terminal sockets is connected to the source of the second PMOS transistor, one end of the fifteenth to twenty-first two-terminal sockets is connected to the source of the third PMOS transistor, one end of the twenty-second to twenty-eighth two-terminal sockets is connected to the source of the fourth PMOS transistor, and one end of the twenty-ninth to thirty-fifth two-terminal sockets is connected to the source of the fifth PMOS transistor; The other ends of the first, eighth, fifteenth, twenty-second, and twenty-ninth two-terminal sockets are all connected to the source of the first NMOS transistor; the other ends of the second, ninth, sixteenth, twenty-third, and thirtieth two-terminal sockets are all connected to the source of the second NMOS transistor; the other ends of the third, tenth, seventeenth, twenty-fourth, and thirty-first two-terminal sockets are all connected to the source of the third PMOS transistor; the other ends of the fourth, eleventh, eighteenth, twenty-fifth, and thirty-second two-terminal sockets are all connected to the source of the fourth NMOS transistor; the other ends of the fifth, twelfth, nineteenth, twenty-sixth, and thirty-third two-terminal sockets are all connected to the source of the fifth NMOS transistor; the other ends of the sixth, thirteenth, twentieth, twenty-seventh, and thirty-fourth two-terminal sockets are all connected to the source of the sixth NMOS transistor; and the other ends of the seventh, fourteenth, twenty-first, twenty-eighth, and thirty-fifth two-terminal sockets are all connected to the source of the seventh NMOS transistor. Each of the two-end sockets is connected to an igniter.

7. The igniter control device according to claim 5, characterized in that The source driver is an 8-channel source driver HT62783A.

8. The igniter control device according to claim 5, characterized in that The pull-down driver is an 8-channel pull-down driver HT62003A.

9. The igniter control device according to claim 1, characterized in that The temperature acquisition module includes: a power isolation module and an isolation amplifier; The input end of the power isolation module is connected to the output end of the working isolation power module, the output end of the power isolation module is connected to the isolation amplifier, the input end of the isolation amplifier is connected to the output end of the temperature sensor, and the output end of the isolation amplifier is connected to the ADC port of the processor module.

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