Intrinsically safe electric loader and intelligent conversion method thereof

Abstract

The present invention relates to the technical field of loader electrification, and in particular provides an intrinsically safe electric loader and an intelligent conversion method thereof. The intrinsically safe electric loader comprises an intrinsically safe conversion switch and a sensor intelligent coupler. The sensor box comprises an oxygen sensor, a gas sensor, an ambient temperature sensor, and a dust sensor. The intrinsically safe conversion switch is an intelligent conversion switch and comprises manual control and intelligent conversion functions. The vehicle ECU system controls the intrinsically safe conversion switch, the sensor intelligent coupler, and the intrinsically safe alarm. The vehicle ECU system controls the front axle gearbox assembly and the rear axle gearbox assembly to implement gear shifting operations. A Schmidt intelligent circuit and a dual-information coupled Schmidt intelligent module circuit perform Schmidt transformation and logic coupling processing on sensor data to implement the intrinsically safe characteristics of the electric loader.

Description

Technical Field

[0001] The present invention relates to the technical field of loader electrification, and in particular to an intrinsically safe electric loader and an intelligent conversion method thereof. Background Art

[0002] Existing technology, application number 202410513444.9, invention patent name "Electric explosion-proof loader platform and loader thereof" patent, application number 202311336071.4, invention patent name "A kind of intrinsically safe constant voltage and constant current drive circuit", "integrates constant current circuit, constant voltage circuit and safety barrier circuit in one, and meets intrinsically safe explosion-proof standard requirements after circuit conversion"; application number 202311551933.5, invention patent name "A kind of intrinsically safe LED constant current source drive circuit for mining", "high power factor constant current source unit, outputs constant current; two-way overcurrent and overvoltage protection circuit unit has overcurrent protection and overvoltage protection; equipped with surge elimination self-recovery output unit, the circuit can automatically restore output to the load; anti-surge absorption circuit can absorb harmful pulse voltage to prevent instantaneous high voltage damage to the circuit"; application number 202322954001.7, The utility model patent, titled "A Flameproof and Intrinsically Safe AC Frequency Converter for Mining," "achieves dust protection on the outside of the frequency converter and dehumidification and drying on the inside." The invention patent, titled "A Protection Circuit and Intrinsically Safe Motor for Mining," with application number 202410460532.7, "prevents the drive module from obtaining electrical energy too quickly, causing the intrinsically safe power supply to frequently initiate safety protection actions, and prevents the stator coil from generating transient high currents and unsafe sparks during startup." The invention patent, titled "A Flameproof Variable Frequency Permanent Magnet Motor," with application number 202410716337.6, "installs protective parts on the motor casing and fills the motor with circulating protective gas to improve the motor's heat dissipation efficiency, avoid sparks during operation, and achieve the flameproof effect of the motor. This eliminates the need for a dedicated flameproof casing and reduces motor production costs."

[0003] The explosion-proof installation space and explosion-proof closed space are formed to provide effective protection, elevate electrical components to improve protection, prevent water ingress, provide overall external protection, reduce dust stains, and provide dust protection. After circuit conversion, the intrinsically safe explosion-proof standard requirements are met. When overcurrent or overvoltage occurs, the load output is stopped, achieving intrinsic safety functions. Protective parts are installed on the motor housing, and protective gas is filled into the motor to avoid sparks during operation, reduce heat, and achieve the explosion-proof effect of the motor. The disadvantage is that the excessive energy cannot be controlled and the intrinsic safety cannot be achieved. Summary of the Invention

[0004] The intrinsically safe electric loader and its intelligent conversion method of the present invention adopt dual-motor independent drive and independent hydraulic system. The vehicle ECU system monitors the data information of the sensor, performs intelligent calculation and processing, generates intelligent control instructions, realizes intrinsically safe conversion, controls the energy output of the power source system, reduces dangerous energy, and achieves safety, reliability and stability.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions

[0006] An intrinsically safe electric loader comprises a front motor vehicle assembly, a rear motor vehicle assembly, an intrinsically safe warning device, an intrinsically safe conversion switch, a vehicle ECU system, a front sensor box, a rear sensor box, and a sensor intelligent coupler, wherein the front motor vehicle assembly is hingedly connected to the rear motor vehicle assembly, and the vehicle ECU system, the sensor intelligent coupler, the power battery, and the battery BMS system are placed in the body of the rear motor vehicle assembly; a cab is mounted on the front upper portion of the rear motor vehicle assembly, the cab comprises a front sensor box, an intrinsically safe warning device, and an intrinsically safe conversion switch, the front sensor box is mounted on the front upper portion of the cab, the front sensor box comprises an oxygen sensor, a gas sensor, and an ambient temperature sensor, which are placed side by side, and the rear sensor box is mounted on the rear upper portion of the rear motor vehicle assembly, the rear sensor box comprises a dust sensor, a gas sensor, an ambient temperature sensor, which are placed side by side The gas sensor includes a front gas sensor and a rear gas sensor, the sensor box includes a front sensor box and a rear sensor box, the gas sensor is installed in the middle position of the sensor box, the ambient temperature sensor is installed in the left position of the sensor box, the intrinsically safe type conversion switch is installed in the cab, the intrinsically safe type warning device is installed on the lower side in front of the cab, the intrinsically safe type conversion switch is an intelligent conversion switch, including manual control and intelligent conversion functions, the vehicle ECU system is electrically connected to the intrinsically safe type conversion switch, the sensor intelligent coupler, and the intrinsically safe type warning device, and the sensor intelligent coupler is electrically connected to the intrinsically safe type warning device and the intrinsically safe type conversion switch; the vehicle ECU system is electrically connected to the front axle gearbox assembly and the rear axle gearbox assembly, and the vehicle ECU system controls the front axle gearbox assembly and the rear axle gearbox assembly to realize gear shifting operations;

[0007] The battery temperature sensor is installed inside the power battery, the BMS temperature sensor is installed inside the battery BMS system, the front axle motor temperature sensor is installed on the front axle drive motor housing, and the front controller temperature sensor is installed inside the front axle motor controller; the rear axle motor temperature sensor is installed on the rear axle drive motor housing, and the rear controller temperature sensor is installed inside the rear axle motor controller. The sensor intelligent coupler is electrically connected to the front axle motor temperature sensor, the rear axle motor temperature sensor, the front controller temperature sensor, the rear controller temperature sensor, the battery temperature sensor, and the BMS temperature sensor; the sensor intelligent coupler includes an intrinsically safe warning signal and an alarm signal; the normal power-on mode of the intrinsically safe conversion switch is the intrinsically safe mode.

[0008] Intelligent transformation method of intrinsically safe electric loader, including:

[0009] The analog data information is transmitted from the probe A converter (53) through the analog switch (55) to the Schmidt intelligent circuit (56) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); the analog data information is transmitted from the probe B converter (83) through the analog switch (55) to the dual-information coupled Schmidt intelligent module (35) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); the analog data information is transmitted from the probe C converter (84) through the analog switch (55) to the dual-information coupled Schmidt intelligent module (35) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66);

[0010] ⑴ Schmidt logic digital conversion relationship of oxygen content:

[0011] When the oxygen concentration K3 is less than 20%, the intelligent logic module A outputs =0, oxygen concentration AO3 terminal outputs low level, when K3>25%, =1, oxygen concentration AO3 terminal output high level; 20%≤K3≤25%, Keep original value =1 or =0 remains unchanged; when =1, the oxygen concentration warning light flashes green, suitable for personnel to enter; when =0, the oxygen concentration warning light flashes yellow, it is not suitable for people to enter, and a request is issued to open or optimize the ventilation system and increase the oxygen content;

[0012] ⑵ Intelligent transformation method of intrinsically safe warning signals:

[0013] ① Battery temperature Schmitt logic transformation relationship

[0014] When the battery temperature K1 is less than 75℃, the intelligent logic module A outputs =0, the battery temperature AO1 terminal outputs a low level, when K1>80℃, =1, battery temperature AO1 terminal outputs high level; 75℃≤K1≤80℃, Keep original value =1 or =0 unchanged;

[0015] ② BMS temperature Schmitt logic transformation relationship

[0016] When the BMS temperature K2 is less than 60℃, the intelligent logic module A outputs =0, BMS temperature AO2 terminal outputs low level, when K2>65℃, =1, BMS temperature AO2 terminal outputs high level; 60℃≤K2≤65℃, Keep original value =1, =0 unchanged;

[0017] ③ The Schmidt logic transformation relationship between the coupled temperature and dual information of the front motor system

[0018] Front axle motor temperature H1 Schmitt logic conversion output :When H1<75℃, =0, when H1>80℃, =1; 75℃≤H1≤80℃, Keep the original value unchanged;

[0019] Front controller temperature H2 Schmitt logic conversion output :When H2<90℃, =0, when H2>95℃, =1; 90℃≤H2≤95℃, Keep the original value unchanged;

[0020] The front motor system dual information coupling transformation logic or relationship: ;

[0021] =1, the front motor system coupling temperature BO5 terminal outputs high level, =0, the front motor system coupling temperature BO5 terminal outputs low level;

[0022] ④ The Schmidt logic transformation relationship between the coupled temperature and dual information of the rear motor system

[0023] Rear axle motor temperature H3 Schmitt logic conversion output :When H3<75℃, =0, when H3>80℃, =1; 75℃≤H3≤80℃, Keep the original value unchanged;

[0024] Rear controller temperature H4 Schmitt logic conversion output :When H4<90℃, =0, when H4>95℃, =1; 90℃≤H4≤95℃, Keep the original value unchanged;

[0025] The logic or relational expression of the dual information coupling transformation of the rear motor system is: ;

[0026] =1, the rear motor system coupling temperature BO6 terminal outputs high level, =0, the rear motor system coupling temperature BO6 terminal outputs a low level;

[0027] ⑤ The intrinsically safe warning signal or gate circuit logic coupling relationship is:

[0028]

[0029] in, It is an intrinsically safe warning signal 86 signal. It is the battery temperature AO1 terminal signal, It is the BMS temperature AO2 terminal signal, Front motor system coupling temperature BO5 terminal signal, Rear motor system coupling temperature BO6 terminal signal;

[0030] When the intrinsically safe warning signal outputs high level =1, the intrinsically safe transfer switch is closed and switched to the intrinsically safe mode, and the front and rear axle gearbox assemblies are downshifted; when the front and rear axle gearbox assemblies are in low gear, the front and rear axle drive motors reduce their output power and operate under rated conditions, and then reduce the current of the high-output motor, using the current of the low-power drive motor as control data, reducing power, heat generation, and lowering the temperature of the drive motor and power battery; the intrinsically safe warning light flashes yellow to serve as a warning;

[0031] ⑶ Intelligent conversion method of alarm signal:

[0032] ① Schmidt logic transformation relationship of dust density

[0033] When the dust density K4 is less than 40g / m3, the intelligent logic module A outputs =0, dust density AO4 terminal outputs low level, when K4>45g / m3, =1, dust density AO4 terminal output high level; 40g / m3≤K4≤45g / m3, Keep original value =1, =0 unchanged;

[0034] ② Gas concentration dual information coupled Schmidt logic transformation relationship

[0035] When the current gas concentration M1 is less than 4.5%, the Schmitt logic conversion output =0, when M1>5%, =1; 4.5%≤M1≤5%, Keep the original value unchanged;

[0036] When the post-gas concentration M2 is less than 4.5%, the Schmitt logic conversion output =0, when M2>5%, =1; 4.5%≤M2≤5%, Keep the original value unchanged;

[0037] Gas concentration dual information coupling transformation logic or relational expression: ;

[0038] =1, gas coupling concentration CO7 terminal output high level, =0, gas coupling concentration CO7 terminal outputs low level;

[0039] ③ Ambient temperature dual information coupled Schmidt logic transformation relationship

[0040] When the current ambient temperature N1 is less than 300℃, the Schmitt logic conversion output =0, when N1>315℃, =1; 300℃≤N1≤315℃, Keep the original value unchanged;

[0041] When the ambient temperature N2 is less than 300℃, the Schmitt logic conversion output =0, when N2>315℃, =1; 300℃≤N2≤315℃, Keep the original value unchanged;

[0042] Ambient temperature dual information coupling conversion logic or relationship: ;

[0043] =1, the ambient coupling temperature CO8 terminal outputs a high level, =0, ambient coupling temperature CO8 terminal outputs low level;

[0044] ④ The alarm signal or gate circuit logic coupling relationship:

[0045]

[0046] in, It is the alarm signal 87, It is the dust density AO4 terminal signal, It is the CO7 end signal of gas coupling concentration. It is the ambient coupling temperature CO8 terminal signal;

[0047] When the alarm signal outputs high level =1, the intrinsically safe transfer switch is closed and converted to intrinsically safe mode. The warning light of the intrinsically safe alarm flashes red and the buzzer of the intrinsically safe alarm emits a harsh alarm sound, indicating the risk of gas explosion or dust combustion explosion. Personnel must evacuate and carry out disaster relief.

[0048] In some embodiments, the sensor intelligent coupler includes an intelligent logic A module, an intelligent logic B module, an intelligent logic C module, and a coupling processing system. The coupling processing system is the intelligent logic processing system of the sensor intelligent coupler. The coupling processing system is internally electrically connected to the intelligent logic A module, the intelligent logic B module, the intelligent logic C module, and the vehicle ECU system is electrically and logically connected to the sensor intelligent coupler.

[0049] In some embodiments, the sensor intelligent coupler includes an intelligent logic A module, an intelligent logic B module, an intelligent logic C module, and a coupling processing system. The coupling processing system is the intelligent logic processing system of the sensor intelligent coupler. The coupling processing system is internally electrically connected to the intelligent logic A module, the intelligent logic B module, the intelligent logic C module, and the vehicle ECU system is electrically and logically connected to the sensor intelligent coupler; the coupling processing system includes intrinsically safe warning signals and alarm signals.

[0050] In some embodiments, the intelligent logic A module includes an intelligent logic A input terminal, a probe A converter, an analog switch, a Schmidt intelligent circuit, a digital distributor, and an intelligent logic AO terminal; the probe A converter includes an intelligent logic A input terminal, a probe A1 thermal information converter, a probe A2 thermal information converter, a probe A3 resistance converter, and a probe A4 photoelectric information converter; the intelligent logic A input terminal includes a battery probe A1 input terminal, a BMS probe A2 input terminal, an oxygen probe A3 input terminal, and a dust probe A4 input terminal.

[0051] In some embodiments, the intelligent logic B module includes an intelligent logic B input terminal, a probe B converter, an analog switch, a dual-information coupled Schmidt intelligent module, a digital distributor, a front motor system coupling temperature BO5 terminal, and a rear motor system coupling temperature BO6 terminal; the probe B converter includes an intelligent logic B input terminal, a probe B1 thermistor information converter, a probe B2 thermistor information converter, a probe B3 thermistor information converter, and a probe B4 thermistor information converter; the intelligent logic B input terminal includes a front motor probe B1 input terminal, a rear motor probe B2 input terminal, a front controller probe B3 input terminal, and a rear controller probe B4 input terminal.

[0052] In some embodiments, the intelligent logic C module includes an intelligent logic C input terminal, a probe C converter, an analog switch, a dual-information coupled Schmidt intelligent module, a digital distributor, a gas coupling concentration CO7 terminal, and an ambient coupling temperature CO8 terminal; the probe C converter includes an intelligent logic C input terminal, a probe C1 electrochemical converter, a probe C3 electrochemical converter, a probe C2 converter, and a probe C4 converter; the intelligent logic C input terminal includes a front gas probe C1 input terminal, a front temperature probe C2 input terminal, a rear gas probe C3 input terminal, and a rear temperature probe C4 input terminal.

[0053] In some embodiments, the intrinsically safe alarm includes a motor temperature alarm, an ambient temperature alarm, a battery temperature alarm, an oxygen concentration alarm, a dust density alarm, and a gas concentration alarm; the intrinsically safe alarm includes a warning light and a warning buzzer; the warning light includes a red light, a yellow light, and a green light, and the warning buzzer includes a comfortable sound buzzer and a harsh sound buzzer.

[0054] In some embodiments, the logic relationship of the Schmitt smart circuit is that an analog signal U passes through the Schmitt smart circuit and outputs a digital signal Q. The upper threshold of U is designed to be U=2.0V, the lower threshold is designed to be U=1.5V, and the hysteresis value is ΔU=2.0V-1.5V=0.5V. The logic relationship of the Schmitt trigger between the analog signal U and the digital signal Q is:

[0055] ① U<1.5V, Q=0;

[0056] ② U>2.0V, Q=1;

[0057] ③ 1.5V≤U≤2.0V, Q keeps the original value, that is, from U<1.5V to U≤2.0V, keep "U<1.5V, QA=0" original value Q=0; from U>2.0V, drop to U≥1.5V, keep "U>2.0V, =1” original value Q=1.

[0058] In some embodiments, the logic relationship of the dual-information coupled Schmitt intelligent module is that the dual analog signals U1 and U2 pass through the dual-information coupled Schmitt intelligent module intelligent circuit to output the digital signal Q. The upper threshold of U1 and U2 is designed to be 2.0V, the lower threshold is 1.5V, and the hysteresis value is 2.0V-1.5V=0.5V; the Schmitt trigger output terminals are respectively 、 , dual information coupled Schmidt intelligent module output Q,

[0059] Analog signal U1 and The logical relationship of the Schmitt trigger is

[0060] ① U1<1.5V, =0;

[0061] ② U1>2.0V, =1;

[0062] ③ 1.5V≤U1≤2.0V, Keep the original value, that is, increase from U1<1.5V to U1≤2.0V, keep "U1<1.5V, =0” original value =0; From U1>2.0V, drop to U1≥1.5V, keep "U1>2.0V, =1” original value =1;

[0063] Analog signal U2 and The logical relationship of the Schmitt trigger is

[0064] ① U2<1.5V, =0;

[0065] ② U2>2.0V, =1;

[0066] ③ 1.5V≤U2≤2.0V, Keep the original value, that is, increase from U2<1.5V to U2≤2.0V, keep "U2<1.5V, =0” original value =0; From U2>2.0V, drop to U2≥1.5V, maintain "U2>2.0V, =1” original value =1;

[0067] The logical relationship of the dual information coupled OR gate intelligent output Q is: .

[0068] In some embodiments, the CP pulse signal of the analog switch and the digital distributor is a quaternary frequency divider with a frequency of 128 Hz. The four input signal terminals of the analog switch are time-sharing input, the sampling frequency of each input signal is 128 Hz, the input frequency of each signal is 32 Hz, and the duty cycle of the input signal is 25%, which is greater than the 24 Hz recognized by the human eye. The four output terminals of the digital distributor are time-sharing output, and the method of synchronously controlling the analog switch and the digital distributor by the CP pulse signal is

[0069] ① The first pulse CP=00, the first input terminal inputs an analog signal, and the first output terminal outputs a digital signal;

[0070] ② The second pulse CP=01, the second input terminal inputs an analog signal, and the second output terminal outputs a digital signal;

[0071] ③ The third pulse CP=10, the third input terminal inputs an analog signal, and the third output terminal outputs a digital signal;

[0072] ④ The 4th pulse CP=11, the 4th input terminal inputs an analog signal, and the 4th output terminal outputs a digital signal.

[0073] Beneficial effects of the present invention

[0074] The intrinsically safe electric loader and intelligent conversion method thereof of the present invention install sensors on related equipment, install temperature sensors on the power system and energy system, and install environmental monitoring sensors on the environmental system. The vehicle ECU system processes sensor data information, controls the power and energy systems to limit energy output, reduces dangerous energy, and achieves safety, reliability, and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0076] Figure 1 This is a general diagram of the intrinsically safe electric loader and its intelligent conversion method according to the present invention;

[0077] Figure 2 This is a driving structure diagram of the intrinsically safe electric loader and its intelligent conversion method according to the present invention;

[0078] Figure 3 The front sensor box of the present invention;

[0079] Figure 4 The rear sensor box of the present invention;

[0080] Figure 5 The sensor intelligent coupler of the present invention;

[0081] Figure 6It is the intelligent logic A module of the sensor intelligent coupler;

[0082] Figure 7 It is the intelligent logic B module of the sensor intelligent coupler;

[0083] Figure 8 It is the intelligent logic C module of the sensor intelligent coupler.

[0084] In the attached figure: 1. Front motor assembly, 2. Front sensor housing, 3. Intrinsically safe warning device, 4. Intrinsically safe transfer switch, 5. Rear motor assembly, 6. Rear sensor housing, 7. Front drive axle, 8. Front axle gearbox assembly, 9. Front axle motor temperature sensor, 10. Front axle motor controller, 11. Front controller temperature sensor, 12. Front axle drive motor, 13. Vehicle ECU system, 14. Power battery, 15. Rear axle drive motor, 16. Rear controller temperature sensor, 17. Rear axle motor controller, 18. Rear axle gearbox assembly, 19. Rear drive axle, 20. Rear axle motor temperature sensor, 21. Battery temperature sensor, 22. Battery BMS system, 23. BMS temperature sensor, 24. Sensor intelligent coupling 25. Input A, 26. Output QA, 27. Oxygen sensor, 28. Dust sensor, 29. Gas sensor, 30. Ambient temperature sensor, 31. Intelligent logic module A, 32. Intelligent logic module B, 33. Logic unit Z1, 34. Logic unit Z2, 35. Dual-information coupled Schmidt intelligent module, 36. Output QB, 37. Battery probe A1 input, 38. Probe A1 thermal information converter, 39. BMS probe A2 input, 40. Probe A2 thermal information converter, 41. Front motor probe B1 input, 42. Probe B1 thermal information converter, 43. Rear motor probe B2 input, 44. Probe B2 thermal information converter, 45. Front controller Probe B3 input, 46. Probe B3 thermal information converter, 47. Rear controller probe B4 input, 48. Probe B4 thermal information converter, 49. Oxygen probe A3 input, 50. Probe A3 resistance converter, 51. Dust probe A4 input, 52. Probe A4 photoelectric information converter, 53. Probe A converter, 54. Pulse signal, 55. Dual 4-to-1 analog switch 74HC4052 circuit, 56. Schmidt intelligent circuit, 57. Control circuit power supply, 58. Battery temperature AO1, 59. BMS temperature AO2, 60. Oxygen concentration AO3, 61. Dust density AO4, 62. Front motor system coupling temperature BO5, 63. Rear motor system coupling temperature BO6 64. Gas Concentration Coupling CO7 Terminal, 65. Ambient Temperature Coupling CO8 Terminal, 66. Data 1-4 Channel 74HC139 Distributor, 67. Intelligent Logic A Input Terminal, 68. Intelligent Logic AO Terminal, 69. Intelligent Logic B Input Terminal, 70. Intelligent Logic C Input Terminal, 71. Front Gas Probe C1 Input Terminal, 72. Probe C1 Electrochemical Converter, 73. Front Temperature Probe C2 Input Terminal, 74. Probe C2 Converter, 75. Rear Gas Probe C3 Input Terminal, 76. Probe C3 Electrochemical Converter, 77. Rear Temperature Probe C4 Input Terminal, 78. Probe C4 Converter, 79. Intelligent Logic C Module, 80. Output QC Terminal, 81. Logic C Unit Z1 Terminal, 82. Logic C Unit Z2 Terminal, 83.Probe B converter, 84. Probe C converter, 85. Coupling processing system, 86. Intrinsically safe warning signal, 87. Alarm signal. DETAILED DESCRIPTION

[0085] The present invention will now be further described with reference to the accompanying drawings and specific examples.

[0086] The intrinsically safe electric loader and the intelligent conversion method thereof of the present invention are as follows Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, it includes: front motor assembly 1, front sensor box 2, intrinsically safe warning device 3, intrinsically safe transfer switch 4, rear motor assembly 5, rear sensor box 6, front drive axle 7, front axle gearbox assembly 8, front axle motor temperature sensor 9, front axle motor controller 10, front controller temperature sensor 11, front axle drive motor 12, vehicle ECU system 13, power battery 14, rear axle drive motor 15, rear controller temperature sensor 16, rear axle motor controller 17, rear axle gearbox assembly 18, rear drive axle 19, rear axle motor temperature sensor 20, battery temperature sensor 21, battery BMS system 22, BMS temperature sensor 23, sensor intelligent coupler 24, input A Terminal 25, output QA terminal 26, oxygen sensor 27, dust sensor 28, gas sensor 29, ambient temperature sensor 30, intelligent logic A module 31, intelligent logic B module 32, logic B unit Z1 terminal 33, logic B unit Z2 terminal 34, dual information coupled Schmidt intelligent module 35, output QB terminal 36, battery probe A1 input terminal 37, probe A1 thermal information converter 38, BMS probe A2 input terminal 39, probe A2 thermal information converter 40, front motor probe B1 input terminal 41, probe B1 thermal information converter 42, rear motor probe B2 input terminal 43, probe B2 thermal information converter 44, front controller probe B3 input terminal 45, probe B3 thermal information converter 46, rear controller probe B4 input terminal 47, probe B4 thermal information converter 48, oxygen probe A3 input terminal 49, probe A3 resistance converter 50, dust probe A4 input terminal 51, probe A4 photoelectric information converter 52, probe A converter 53, pulse signal 54, analog switch 55, Schmidt intelligent circuit 56, control circuit power supply 57, battery temperature AO1 terminal 58, BMS temperature AO2 terminal 59, oxygen concentration AO3 terminal 60, dust density AO4 terminal 61, front motor system coupling temperature BO5 terminal 62, rear motor system coupling temperature BO6 terminal 63, gas coupling concentration CO7 terminal 64, ambient coupling temperature CO8 terminal 65 , digital distributor 66, intelligent logic A input terminal 67, intelligent logic AO terminal 68, intelligent logic B input terminal 69, intelligent logic C input terminal 70, front gas probe C1 input terminal 71, probe C1 electrochemical converter 72, front temperature probe C2 input terminal 73, probe C2 converter 74, rear gas probe C3 input terminal 75, probe C3 electrochemical converter 76, rear temperature probe C4 input terminal 77, probe C4 converter 78, intelligent logic C module 79, output QC terminal 80, logic C unit Z1 terminal 81, logic C unit Z2 terminal 82, probe B converter 83, probe C converter 84, coupling processing system 85, intrinsically safe warning signal 86, alarm signal 87.

[0087] Assembly relationship:

[0088] The intrinsically safe electric loader and its intelligent conversion method include a front motor vehicle assembly 1, a rear motor vehicle assembly 5, a vehicle ECU system 13, a sensor intelligent coupler 24, a hydraulic system, a sensor box, an intrinsically safe warning device 3, and an intrinsically safe conversion switch 4; the hydraulic system includes a hydraulic motor system and a hydraulic drive system; the sensor box includes a front sensor box 2 and a rear sensor box 6.

[0089] The front motor vehicle assembly 1 includes a front drive axle 7, a front axle gearbox assembly 8, and a front axle drive motor 12. The rear motor vehicle assembly 5 includes a rear drive axle 19, a rear axle gearbox assembly 18, a rear axle drive motor 15, a vehicle ECU system 13, a sensor intelligent coupler 24, a power battery 14, and a cab. The front motor vehicle assembly 1 is articulated to the rear motor vehicle assembly 5.

[0090] The vehicle ECU system 13, power battery 14, battery BMS system 22, and sensor intelligent coupler 24 are placed in the body of the rear motor vehicle assembly 5. The battery temperature sensor 21 is installed inside the power battery 14, and the BMS temperature sensor 23 is installed in the battery BMS system 22.

[0091] The cab is installed on the front upper part of the rear motor vehicle assembly 5. The cab includes a front sensor box 2, an intrinsically safe warning device 3, and an intrinsically safe conversion switch 4. The front sensor box 2 is installed on the front upper part of the cab, and includes an oxygen sensor 27, a gas sensor 29, and an ambient temperature sensor 30. The gas sensor 29 is placed in the middle position of the front sensor box 2. The oxygen sensor 27 and the ambient temperature sensor 30 are placed in the front sensor box 2, on both sides of the gas sensor 29; the rear sensor box 6 is installed on the rear upper part of the rear motor vehicle assembly 5, and includes a dust sensor 28, a gas sensor 29, and an ambient temperature sensor 30. The gas sensor 29 is placed in the middle position of the rear sensor box 6. The dust sensor 28 and the ambient temperature sensor 30 are placed in the rear sensor box 6, on both sides of the gas sensor 29.

[0092] The intrinsically safe type transfer switch 4 is installed in the cab, and the intrinsically safe type warning device 3 is installed on the lower side in front of the cab. The intrinsically safe type warning device 3 includes a motor temperature warning device, an ambient temperature warning device, a battery temperature warning device, an oxygen concentration warning device, a dust density warning device, and a gas concentration warning device. The warning device includes a warning light and a warning buzzer. The warning light includes a red light, a yellow light, and a green light. The warning buzzer includes a comfortable sound buzzer and a harsh sound buzzer. The intrinsically safe type transfer switch 4 is an intelligent transfer switch, including manual control and intelligent conversion functions. The normal power-on state of the intrinsically safe type transfer switch 4 is the intrinsically safe mode. The vehicle ECU system 13 is electrically connected to the intrinsically safe type transfer switch 4, the sensor intelligent coupler 24, and the intrinsically safe type warning device 3. The sensor intelligent coupler 24 is electrically connected to the intrinsically safe type warning device 3 and the intrinsically safe type transfer switch 4.

[0093] The front axle drive motor 12 is directly connected to the front axle gearbox assembly 8, the front axle gearbox assembly 8 is connected to the front drive axle 7, and the left and right output half-shafts of the front drive axle 7 are respectively installed with the left and right front drive wheels; the front axle drive motor 12 is fixedly installed on the bracket body of the front motor vehicle assembly 1, and the front axle motor controller 10 is placed on the bracket body of the front motor vehicle assembly 1. The front axle motor controller 10 is electrically connected to the front axle drive motor 12, the power battery 14, and the vehicle ECU system 13. The front axle motor temperature sensor 9 is placed on the housing of the front axle drive motor 12, and the front controller temperature sensor 11 is installed in the front axle motor controller 10. The front axle motor temperature sensor 9 and the front controller temperature sensor 11 are electrically connected to the sensor intelligent coupler 24.

[0094] The front axle transmission assembly 8 includes a front axle transmission, a front axle transmission automatic shift mechanism, and a front axle shift controller. The front axle transmission automatic shift mechanism operates the front axle transmission speed gear through a shift fork to shift gears. The front axle shift controller controls the operation of the front axle transmission automatic shift mechanism. The front axle transmission assembly 8 is electrically connected to the vehicle ECU system 13. The vehicle ECU system 13 controls the front axle shift controller to generate a shift operation to realize the shifting of the front axle transmission.

[0095] The rear axle drive motor 15 is directly connected to the rear axle gearbox assembly 18, the rear axle gearbox assembly 18 is connected to the rear drive axle 19, and the left and right output half-shafts of the rear drive axle 19 are respectively installed with the left and right rear drive wheels; the rear axle drive motor 15 is fixedly installed on the bracket body of the rear motor vehicle assembly 5, and the rear axle motor controller 17 is placed on the bracket body of the rear motor vehicle assembly 5. The rear axle motor controller 17 is electrically connected to the rear axle drive motor 15, the power battery 14, and the vehicle ECU system 13. The rear axle motor controller 17 controls the operation of the rear axle drive motor 15; the rear axle motor temperature sensor 20 is placed on the housing of the rear axle drive motor 15, the rear controller temperature sensor 16 is installed in the rear axle motor controller 17, and the sensor intelligent coupler 24 is electrically connected to the rear axle motor temperature sensor 20 and the rear controller temperature sensor 16.

[0096] The rear axle transmission assembly 18 includes a rear axle transmission, a rear axle transmission automatic shift mechanism, and a rear axle shift controller. The rear axle transmission automatic shift mechanism operates the rear axle transmission speed gear through a shift fork to shift gears. The rear axle shift controller controls the operation of the rear axle transmission automatic shift mechanism. The rear axle transmission assembly 18 is electrically connected to the vehicle ECU system 13. The vehicle ECU system 13 controls the rear axle shift controller to generate a shift operation to realize rear axle transmission shifting.

[0097] The sensor intelligent coupler 24 includes an intelligent logic A module 31, an intelligent logic B module 32, an intelligent logic C module 79, and a coupling processing system 85. The coupling processing system 85 is the intelligent logic processing system of the sensor intelligent coupler 24. The coupling processing system 85 is electrically and logically connected to the intelligent logic A module 31, the intelligent logic B module 32, and the intelligent logic C module 79. The vehicle ECU system 13 is electrically and logically connected to the sensor intelligent coupler 24. The coupling processing system 85 includes an intrinsically safe warning signal 86 and an alarm signal 87.

[0098] The intrinsically safe warning signal 86 is connected to the battery temperature AO1 terminal 58, the BMS temperature AO2 terminal 59, the front motor system coupling temperature BO5 terminal 62, and the rear motor system coupling temperature BO6 terminal 63 through an OR gate circuit.

[0099] The alarm signal 87 is connected to the gas coupling concentration CO7 terminal 64, the dust density AO4 terminal 61, and the ambient coupling temperature CO8 terminal 65 through an OR gate circuit.

[0100] The control circuit power supply 57 is electrically connected to the intelligent logic A module 31, the intelligent logic B module 32, the intelligent logic C module 79, the vehicle ECU system 13, and the sensor intelligent coupler 24. The pulse signal 54 is electrically connected to the analog switch 55 and the digital distributor 66. The analog switch 55 is a dual 4-to-1 analog switch 74HC4052 chip circuit, and the digital distributor 66 is a data 1-way to 4-way 74HC139 chip distributor.

[0101] The intelligent logic A module 31 includes an intelligent logic A input terminal 67, a probe A converter 53, an analog switch 55, an input A terminal 25, a Schmidt intelligent circuit 56, an output QA terminal 26, a digital distributor 66, and an intelligent logic AO terminal 68; the probe A converter 53 includes an intelligent logic A input terminal 67, a probe A1 thermal information converter 38, a probe A2 thermal information converter 40, a probe A3 resistance converter 50, and a probe A4 photoelectric information converter 52; the intelligent logic A input terminal 67 includes a battery probe A1 input terminal 37, a BMS probe A2 input terminal 39, an oxygen probe A3 input terminal 49, and a dust probe A4 input terminal 51.

[0102] The battery probe A1 input terminal 37 is the input terminal of the probe A1 thermal information converter 38, the BMS probe A2 input terminal 39 is the input terminal of the probe A2 thermal information converter 40, the oxygen probe A3 input terminal 49 is the input terminal of the probe A3 resistance converter 50, and the dust probe A4 input terminal 51 is the input terminal of the probe A4 photoelectric information converter 52.

[0103] The intelligent logic A input terminal 67 is the input port of the probe A converter 53. The probe A converter 53 is electrically connected to the analog switch 55. The analog switch 55 is electrically and logically connected to the Schmidt intelligent circuit 56. The Schmidt intelligent circuit 56 is electrically and logically connected to the digital distributor 66 through the output QA terminal 26. The output terminal of the digital distributor 66 is the intelligent logic AO terminal 68; the intelligent logic AO terminal 68 includes the battery temperature AO1 terminal 58, the BMS temperature AO2 terminal 59, the oxygen concentration AO3 terminal 60, and the dust density AO4 terminal 61.

[0104] The intelligent logic B module 32 includes an intelligent logic B input terminal 69, a probe B converter 83, an analog switch 55, a logic B unit Z1 terminal 33, a logic B unit Z2 terminal 34, a dual-information coupled Schmidt intelligent module 35, an output QB terminal 36, a digital distributor 66, a front motor system coupling temperature BO5 terminal 62, and a rear motor system coupling temperature BO6 terminal 63; the intelligent logic B input terminal 69 includes a front motor probe B1 input terminal 41, a rear motor probe B2 input terminal 43, a front controller probe B3 input terminal 45, and a rear controller probe B4 input terminal 47; the probe B converter 83 includes an intelligent logic B input terminal 69, a probe B1 thermal information converter 42, a probe B2 thermal information converter 44, a probe B3 thermal information converter 46, and a probe B4 thermal information converter 48.

[0105] The front motor probe B1 input terminal 41 is the input terminal of the probe B1 thermal information converter 42, the rear motor probe B2 input terminal 43 is the input terminal of the probe B2 thermal information converter 44, the front controller probe B3 input terminal 45 is the input terminal of the probe B3 thermal information converter 46, and the rear controller probe B4 input terminal 47 is the input terminal of the probe B4 thermal information converter 48.

[0106] The intelligent logic B input terminal 69 is the input port of the probe B converter 83, the probe B converter 83 is electrically connected to the analog switch 55, the output terminal of the analog switch 55 is the logic B unit Z1 terminal 33 and the logic B unit Z2 terminal 34, which are electrically connected to the dual-information coupled Schmidt intelligent module 35, and the dual-information coupled Schmidt intelligent module 35 is electrically connected to the digital distributor 66 through the output QB terminal 36, and the output port of the digital distributor 66 is the front motor system coupling temperature BO5 terminal 62 and the rear motor system coupling temperature BO6 terminal 63.

[0107] The intelligent logic C module 79 includes an intelligent logic C input terminal 70, a probe C converter 84, an analog switch 55, a logic C unit Z1 terminal 81, a logic C unit Z2 terminal 82, a dual-information coupled Schmidt intelligent module 35, an output QC terminal 80, a digital distributor 66, a gas coupling concentration CO7 terminal 64, and an ambient coupling temperature CO8 terminal 65; the probe C converter 84 includes an intelligent logic C input terminal 70, a probe C1 electrochemical converter 72, a probe C3 electrochemical converter 76, a probe C2 converter 74, and a probe C4 converter 78; the front gas probe C1 input terminal 71 is the input terminal of the probe C1 electrochemical converter 72, the rear gas probe C3 input terminal 75 is the input terminal of the probe C3 electrochemical converter 76, the front temperature probe C2 input terminal 73 is the input terminal of the probe C2 converter 74, and the rear temperature probe C4 input terminal 77 is the input terminal of the probe C4 converter 78; the intelligent logic C input terminal 70 includes the front gas probe C1 input terminal 71, the rear gas probe C3 input terminal 75, the front temperature probe C2 input terminal 73, and the rear temperature probe C4 input terminal 77.

[0108] The intelligent logic C input terminal 70 is the input port of the probe C converter 84, the probe C converter 84 is electrically connected to the analog switch 55, the output terminal logic C unit Z1 terminal 81 and the logic C unit Z2 terminal 82 of the analog switch 55 are electrically connected to the dual-information coupled Schmidt intelligent module 35, the dual-information coupled Schmidt intelligent module 35 is electrically connected to the digital distributor 66 through the output QC terminal 80, and the output ports of the digital distributor 66 are the gas coupling concentration CO7 terminal 64 and the ambient coupling temperature CO8 terminal 65.

[0109] The design principle of the present invention is as follows

[0110] The battery BMS system 22 is a battery management system, and manages the power battery 14 .

[0111] Oxygen sensors are classified into resistance type, electrochemical type, zirconia type, fluorescence quenching type and the like. The oxygen sensor 27 of the present invention is a resistance type.

[0112] Gas sensors are classified into types such as those based on electrochemical principle, thermal conductivity principle, optical principle, semiconductor principle, and catalytic combustion principle. The gas sensor 29 of the present invention is based on the electrochemical principle.

[0113] The dust sensor is divided into light source emission, light propagation and scattering, receiver reception, light intensity detection and conversion, signal processing, and concentration display. The dust sensor 28 of the present invention is a receiver reception type. The principle is that a photoresistor or photodiode receives scattered light, and the signal processing converts the light intensity into an electrical signal, performs corresponding processing, and displays the concentration, converting it into a digital or analog signal to show the dust depth. The dust particles reflect the infrared light emitted by the infrared light emitting diode, and the light intensity is detected by the phototransistor and converted into an electrical signal.

[0114] The mine's gas concentration is below 2%, CO2 <0.5%, and oxygen concentration is above 20%, which are suitable environmental conditions for people to enter.

[0115] 1. Gas detection

[0116] Gas explosion must meet three basic conditions simultaneously: gas concentration within the explosion limit, oxygen concentration in the mixed gas, and a high-temperature fire source with sufficient energy;

[0117] (1) The concentration limit of gas explosion is generally 5% to 16%. The explosion intensity is the largest when the gas concentration is 9.5%. Therefore, the critical value range of the gas sensor 29 is designed to be 4.5% to 5% gas concentration.

[0118] (2) If the oxygen concentration is less than 12%, gas explosion will not occur. Since the oxygen content suitable for human activities should not be less than 20%, the monitoring of oxygen concentration is subordinate to the gas concentration. Only when the gas concentration exceeds 5% does the monitoring of oxygen concentration have practical significance. Therefore, the oxygen concentration is based on the suitability of human activities. The critical value range of oxygen concentration of oxygen sensor 27 is designed to be 20% to 25%, which is the normal amount of oxygen. Since the oxygen content suitable for human activities cannot be less than 20%, it is necessary to control the gas concentration, temperature and fire source in areas suitable for human activities.

[0119] ⑶ The temperature of the gas explosion ignition source must be no less than 650℃ or open flame.

[0120] ⒉ Coal powder density detection

[0121] There are three basic conditions that must be met simultaneously for a pulverized coal explosion:

[0122] ⑴ The explosion limit of coal powder density is 45~2000g / The strongest concentration is 300-400g / ‌, the critical point of designing dust sensor 28 coal powder density does not exceed 40g / ~45g / Dust density.

[0123] (2) Pulverized coal can only detonate at a temperature between 610 and 1050°C, generally between 700 and 800°C. The oxidation and heat release of pulverized coal cause the temperature to gradually rise to 70 to 80°C, and then the temperature rise rate suddenly accelerates. When the critical value of the coal ignition point of 300 to 350°C is reached, the coal seam will spontaneously combust. Based on the temperature of the gas explosion ignition source and the pulverized coal spontaneous combustion temperature, the maximum temperature critical value range of the ambient temperature sensor 30 is designed to not exceed 300 to 315°C.

[0124] ⑶ When the oxygen concentration is lower than 15%, the possibility of explosion of the gas-powder mixture is very small.

[0125] ⒊ Power system detection

[0126] For permanent magnet synchronous motors, the insulation grade of the stator winding enameled wire is F-class insulation material with a heat resistance temperature of 155°C, the maximum allowable temperature of H-class insulation is 180°C, and the maximum allowable temperature of permanent magnet synchronous motors is 150°C. In extreme cases, the temperature rise of the iron core in contact with the winding does not exceed 125°C. If the internal temperature of the motor exceeds 110°C, it will cause significant damage to the motor.

[0127] Under rated load, the motor casing temperature is usually between 60℃ and 70℃ and should not exceed 80℃. The normal operating temperature limit of high-power motors can reach above 100℃. When operating under extreme working conditions, the motor surface temperature is generally considered safe within 110℃, and the temperature difference between the inside and outside of the motor is about 40℃.

[0128] The temperature of rolling bearings should not exceed 95°C, and that of sliding bearings should not exceed 80°C. Too high a temperature will change the oil quality and damage the oil film.

[0129] The maximum temperature critical value of the front axle motor temperature sensor 9 and the rear axle motor temperature sensor 20 during operation is designed not to exceed 75℃~80℃, and the maximum temperature range critical value of the front controller temperature sensor 11 and the rear controller temperature sensor 16 is designed not to exceed 90℃~95℃. The motor controller has the functions of outputting motor speed, operating current, etc.

[0130] The hydraulic system operates under rated conditions and meets the requirements of intrinsic safety conditions.

[0131] 4. Power battery system testing

[0132] Conventional lithium-ion batteries operate in a temperature range of -20°C to 60°C. Generally, performance and discharge capacity decrease below 0°C. Therefore, the typical operating temperature for lithium-ion batteries is 0°C to 40°C. However, some lithium-ion batteries have specialized environmental requirements, requiring different operating temperature ranges.

[0133] ‌‌Low-temperature polymer battery‌: The minimum operating temperature of ordinary low-temperature polymer batteries is -40°C; the minimum operating temperature of ultra-low-temperature polymer batteries is -55°C.

[0134] Wide-temperature low-temperature battery: can operate in a temperature range of -40°C to 70°C and is mainly used in products with special requirements such as in-vehicle electronic equipment.

[0135] High-temperature lithium battery: The operating temperature range can reach -40℃~85℃.

[0136] In addition, lithium batteries also have certain storage temperature requirements, and the optimal storage temperature is between 15°C and 25°C. Within this temperature range, the chemical activity inside the battery is relatively stable and the self-discharge rate is low, which can effectively reduce the loss of battery capacity and extend the battery's storage life.

[0137] Temperature range of BMS battery management system:

[0138] The operating temperature range of the BMS is -40℃ to 85℃, and the operating temperature range of the battery pack charging and discharging is -20℃ to 55℃ and -30℃ to 55℃ respectively.

[0139] The BMS monitors the battery's temperature in real time through sensors and activates the cooling system or reduces charging power when the temperature is too high to prevent battery overheating and damage. At the same time, in low-temperature environments, the BMS may activate the heating function to increase the battery temperature and ensure normal charging and discharging.

[0140] ‌Ambient temperature, storage temperature and operating temperature all have an impact on the performance and life of the BMS. When designing a BMS, it is necessary to consider the requirements of these three factors and design and control them according to the specific situation to ensure the performance and life of the BMS.

[0141] The operating temperature range of BMS is usually -40℃ ~ 85℃, and the operating temperature range of battery management systems for electric vehicles is -20℃ ~ 65℃.

[0142] The maximum operating temperature range of the battery temperature sensor 21 is 75°C to 80°C.

[0143] The maximum operating temperature range of the BMS temperature sensor 23 is 60° C. to 65° C.

[0144] 5. Analog switch circuit

[0145] The 74HC4052 and the AMEC AIP74HC4052 are both 2-way, 4-to-1 analog switch circuit chips with a common enable input control bit, mainly used in analog multiplexers, digital multiplexers, and signal selection. The 74HC4051 analog switch is an 8-to-1 analog switch circuit chip with three address select terminals (A0-A2), 8 independent input / output terminals (Y0-Y7), and a common input / output terminal (Z). The 74HC139 is a dual 2-wire to 4-wire decoder chip with input pins (1A, 1B), an enable pin (G1), and output pins (1Y0-1Y3); input pins (2A, 2B), an enable pin (G2), output pins (2Y0-2Y3), as well as power and ground pins.

[0146] 6. Sensor information intelligent coupling technology:

[0147] ⑴ Intelligent logic A module 31 Schmidt intelligent data processing process:

[0148] The data information of the battery temperature sensor 21, BMS temperature sensor 23, oxygen sensor 27, and dust sensor 28 are processed by the intelligent logic module A 31 to generate an AO digital signal, which is output from the intelligent logic AO terminal 68; the input terminal of the Schmidt intelligent circuit 56 is the input A terminal 25, represented by U, which is an analog signal U, and the output terminal of the Schmidt intelligent circuit 56 is the output QA terminal 26, represented by Indicates that it is a digital signal The upper threshold of U is designed to be 2.0V, the lower threshold is designed to be 1.5V, and the hysteresis value is 2.0V-1.5V=0.5V; the logical relationship between the analog signal U and the digital signal QA Schmitt trigger is:

[0149] ① U<1.5V, =0;

[0150] ② U>2.0V, =1;

[0151] ③ 1.5V≤U≤2.0V, Keep the original value, that is, increase from U<1.5V to U<2.0V, keep "U<1.5V, =0" original value =0; from U>2.0V down to U≥1.5V, keep "U>2.0V, =1" original value =1.

[0152] The CP pulse signal 54 is a quaternary frequency divider with a frequency of 128 Hz. The four input signal terminals of the analog switch 55 are time-sharing inputs. The sampling frequency of each input signal is 128 Hz, the input frequency of each signal is 32 Hz, and the duty cycle of the input signal is 25%, which is greater than the 24 Hz recognized by the human eye. The CP pulse signal 54 synchronously controls the analog switch 55 and the digital distributor 66. The relationship between CP and the input U and output QA is shown in Table 1.

[0153] Table 1

[0154] .

[0155] ① CP=00,U=0A, AO1= ,The logical relationship is that the 0A analog signal is transformed by Schmidt intelligent logic and outputs the digital signal through AO1;

[0156] ② CP=01, U=1A, AO2= ,The logical relationship is that the 1A analog signal is transformed by Schmitt intelligent logic, and AO2 outputs a digital signal;

[0157] ③ CP=10,U=2A, AO3= ,The logical relationship is that the 2A analog signal is transformed by Schmitt intelligent logic, and AO3 outputs a digital signal;

[0158] ④ CP=11, U=3A, AO4= ,The logical relationship is that the 3A analog signal is transformed by Schmidt intelligent logic, and AO4 outputs a digital signal.

[0159] Schmidt intelligent circuit output is stable and reliable.

[0160] The battery temperature sensor 21 is connected to the battery probe A1 input terminal 37, receives an analog signal as input, and outputs a digital signal from the battery temperature AO1 terminal 58. The upper threshold value of the power battery 14 temperature T is set to 80°C, the lower threshold value is 75°C, and the hysteresis value is 80°C-75°C=5°C. The probe A1 thermal information converter 38 performs an intelligent equivalent transformation on the temperature T to generate a voltage analog signal U, which is connected to the analog switch 55 input terminal 0A. The corresponding upper threshold value of the voltage U is 2.0V, the lower threshold value is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship obtained by solving the two-point equation is U=T / 10-6. The maximum clamping voltage of U is 3.0V and the minimum value is 0V. The analog signal U undergoes Schmidt intelligent logic transformation and outputs a digital signal from the battery temperature AO1 terminal 58 of the digital distributor 66.

[0161] Battery temperature Schmitt logic transformation relationship

[0162] When the battery temperature K1 is less than 75℃, the intelligent logic module A outputs =0, the battery temperature AO1 terminal outputs a low level, when K1>80℃, =1, battery temperature AO1 terminal outputs high level; 75℃≤K1≤80℃, Keep original value =1 or =0 remains unchanged.

[0163] The BMS temperature sensor 23 is connected to the BMS probe A2 input terminal 39, receives an analog signal, and outputs a digital signal from the BMS temperature AO2 terminal 59. The upper threshold value of the battery BMS system 22 temperature T is set to 65°C, the lower threshold value is 60°C, and the temperature hysteresis value is 65°C-60°C=5°C. The probe A2 thermal information converter 40 performs an intelligent equivalent transformation to generate a voltage signal U, which is connected to the analog switch 55 input terminal 1A. The corresponding voltage U has an upper threshold value of 2.0V, a lower threshold value of 1.5V, and a hysteresis value of 0.5V. The equivalent transformation relationship obtained by solving the two-point equation is U=T / 10-4.5. The maximum clamping voltage of U is 3.0V and the minimum value is 0V. The analog signal U undergoes Schmidt intelligent logic transformation and outputs a digital signal from the battery temperature AO2 terminal 59 of the digital distributor 66.

[0164] BMS temperature Schmitt logic transformation relationship

[0165] When the BMS temperature K2 is less than 60℃, the intelligent logic module A outputs =0, BMS temperature AO2 terminal outputs low level, when K2>65℃, =1, BMS temperature AO2 terminal outputs high level; 60℃≤K2≤65℃, Keep original value =1, =0 remains unchanged.

[0166] The resistive oxygen sensor 27 is connected to the oxygen probe A3 input terminal 49, receives an analog signal, and outputs a digital signal from the oxygen concentration AO3 terminal 60. The upper threshold of the oxygen concentration T of the oxygen sensor 27 is set to 25%, the lower threshold is set to 20%, and the hysteresis value is 25%-20%=5%. The probe A3 resistance converter 50 performs an intelligent equivalent transformation to generate a voltage signal U, which is connected to the analog switch 55 input terminal 2A. The upper threshold of the corresponding voltage U is 2.0V, the lower threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship obtained by solving the two-point equation is U=T / 10-0.5. The maximum clamping voltage of U is 3.0V and the minimum is 0V. The analog signal U undergoes Schmidt intelligent logic transformation and outputs a digital signal from the oxygen concentration AO3 terminal 60 of the digital distributor 66.

[0167] The analog data information is transmitted from the probe A converter (53) through the analog switch (55) to the Schmidt intelligent circuit (56) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); the analog data information is transmitted from the probe B converter (83) through the analog switch (55) to the dual-information coupled Schmidt intelligent module (35) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); the analog data information is transmitted from the probe C converter (84) through the analog switch (55) to the dual-information coupled Schmidt intelligent module (35) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66).

[0168] Schmidt logic digital conversion relationship of oxygen content:

[0169] When the oxygen concentration K3 is less than 20%, the intelligent logic module A outputs =0, oxygen concentration AO3 terminal outputs low level, when K3>25%, =1, oxygen concentration AO3 terminal output high level; 20%≤K3≤25%, Keep original value =1 or =0 remains unchanged; when =1, the oxygen concentration warning light flashes green, suitable for personnel to enter; when =0, the oxygen concentration warning light flashes yellow, it is not suitable for personnel to enter, and a request is issued to open or optimize the ventilation system and increase the oxygen content.

[0170] The dust sensor 28 of the coal dust in the mine is connected to the dust probe A4 input terminal 51, inputs an analog signal, and outputs a digital signal from the dust density AO4 terminal 61; the upper limit threshold of the dust density T of the dust sensor 28 is set to 45g / , the lower limit threshold is 40g / , the return difference is 5g / ; The probe A4 photoelectric information converter 52 performs intelligent equivalent transformation to generate a voltage signal U, which is connected to the input terminal 3A of the analog switch 55. The upper threshold of the corresponding voltage U is 2.0V, the lower threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship is solved by the two-point formula as U=T / 10-2.5. The maximum clamping voltage of U is 3.0V and the minimum is 0V; the analog signal U is transformed by Schmidt intelligent logic and outputs a digital signal from the dust density AO4 terminal 61 of the digital distributor 66.

[0171] Schmidt logic transformation relationship of dust density

[0172] When the dust density K4<40g / When the intelligent logic module A outputs =0, dust density AO4 terminal outputs low level, when K4>45g / hour, =1, dust density AO4 terminal output high level; 40g / ≤K4≤45g / , Keep original value =1, =0 remains unchanged.

[0173] ⑵ Intelligent logic B module 32 Schmidt intelligent data processing process:

[0174] The data information of the front axle motor temperature sensor 9 and the front controller temperature sensor 11 is processed by the intelligent logic module B 32 to generate a BO5 coupled digital output signal, which is output from the front motor system coupled temperature BO5 terminal 62;

[0175] The data information of the rear axle motor temperature sensor 20 and the rear controller temperature sensor 16 is processed by the intelligent logic module B 32 to generate a BO6 coupled digital output signal, which is output from the rear motor system coupled temperature BO6 terminal 63;

[0176] The input terminals of the dual-information coupled Schmidt intelligent module 35 are the logic B unit Z1 terminal 33 and the logic B unit Z2 terminal 34, which are represented by U1 and U2. The upper threshold of U1 and U2 is designed to be 2.0V, the lower threshold is 1.5V, and the hysteresis value is 2.0V-1.5V=0.5V; the output terminals of the dual-information coupled Schmidt intelligent module 35 are respectively 、 .

[0177] Analog signal U1 and The logical relationship of the Schmitt trigger is

[0178] ① U1<1.5V, =0;

[0179] ② U1>2.0V, =1;

[0180] ③ 1.5V≤U1≤2.0V, Keep the original value, that is, increase from U1<1.5V to U1<2.0V, keep "U1<1.5V, =0” original value =0; from U1>2.0V down to U1≥1.5V, keep "U1>2.0V, =1” original value =1.

[0181] Analog signal U2 and The logical relationship of the Schmitt trigger is

[0182] ① U2<1.5V, =0;

[0183] ② U2>2.0V, =1;

[0184] ③ 1.5V≤U2≤2.0V, Keep the original value, that is, increase from U2<1.5V to U2<2.0V, keep "U2<1.5V, =0” original value =0; from U2>2.0V down to U2≥1.5V, keep "U2>2.0V, =1” original value =1.

[0185] 、 The two input terminals of the OR gate are electrically connected, and the output terminal of the OR gate is the output End 36, use The logical relationship is .

[0186] The CP pulse signal 54 synchronously controls the input of the analog switch 55 and the output of the digital distributor 66. The relationship between CP and the input and output is shown in Table 2.

[0187] Table 2

[0188] .

[0189] ① CP=00 / 10, U1=0B, U2=0C, BO5= + The logical relationship is that the 0B and 0C signals are transformed by Schmidt intelligent logic and then output by logic or BO5; the temperature of the front motor and controller are coupled and output by intelligent logic transformation.

[0190] ② CP=01 / 11, U1=1B, U2=1C, BO6= + The logical relationship is that the 1B and 1C signals are transformed by Schmidt intelligent logic and then output by logic or BO6; then the motor and controller temperature intelligent logic transformation is coupled and output.

[0191] The front axle motor temperature sensor 9 is connected to the front motor probe B1 input terminal 41, and the front controller temperature sensor 11 is connected to the front controller probe B3 input terminal 45; the temperature B1 analog data and the temperature B3 analog data are Schmidt intelligent conversion through the intelligent logic B module 32, and then logically or coupled, and output The output of terminal 36 is distributed by the digital distributor 66 to the output digital signal of the coupling temperature BO5 terminal 62 of the front motor system; the external temperature T1 of the front axle drive motor and the temperature T2 of the front controller are set. The upper threshold of T1 is 80°C, the lower threshold is 75°C, and the hysteresis value is 80°C-75°C=5°C. The probe B1 thermal information converter 42 performs an intelligent equivalent transformation on the temperature T1 to generate a voltage signal U1, which is connected to the input terminal 0B of the analog switch 55. The upper threshold of the corresponding voltage U1 is 2.0V, the lower threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship is solved by the two-point formula as U =T / 10-6, the highest clamping voltage of U1 is 3.0V, and the minimum value is 0V; the upper limit threshold of T2 is 95℃, the lower limit threshold is 90℃, and the hysteresis value is 95℃-90℃=5℃. The probe B3 thermal information converter 46 performs intelligent equivalent transformation on the temperature T2 to generate a voltage signal U2, which is connected to the input terminal 0C of the analog switch 55. The upper limit threshold of the corresponding voltage U2 is 2.0V, the lower limit threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship solved by the two-point formula is U=T / 10-7.5, and the highest clamping voltage of U2 is 3.0V, and the minimum value is 0V.

[0192] The analog signals U1 and U2 are transformed by Schmidt intelligent logic and then logically coupled. = + , which produces the output Terminal 36 digital signal outputs the digital signal from the front motor system coupling temperature BO5 terminal 62 of the digital distributor 66.

[0193] The Schmidt logic transformation relationship of the coupled temperature dual information of the front motor system

[0194] Front axle motor temperature H1 Schmitt logic conversion output :When H1<75℃, =0, when H1>80℃, =1; 75℃≤H1≤80℃, Keep the original value unchanged;

[0195] Front controller temperature H2 Schmitt logic conversion output :When H2<90℃, =0, when H2>95℃, =1; 90℃≤H2≤95℃, Keep the original value unchanged;

[0196] The front motor system dual information coupling transformation logic or relationship: ;

[0197] =1, the front motor system coupling temperature BO5 terminal outputs high level, =0, the front motor system coupling temperature BO5 terminal outputs a low level.

[0198] The rear axle motor temperature sensor 20 is connected to the rear motor probe B2 input terminal 43, and the rear controller temperature sensor 16 is connected to the probe B4 thermal information converter 48; the temperature B2 analog data and the temperature B4 analog data are Schmidt intelligent conversion through the intelligent logic B module 32, and then logically or coupled, and output The output of terminal 36 is distributed by the digital distributor 66 to the output digital signal of the coupling temperature BO6 terminal 63 of the rear motor system; the external temperature T1 of the rear axle drive motor and the temperature T2 of the rear controller are set. The upper threshold of T1 is 80°C, the lower threshold is 75°C, and the hysteresis value is 80°C-75°C=5°C. The probe B2 thermal information converter 44 performs an intelligent equivalent transformation on the temperature T1 to generate a voltage signal U1, which is connected to the input terminal 1B of the analog switch 55. The upper threshold of the corresponding voltage U1 is 2.0V, the lower threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship is solved by the two-point formula as U =T / 10-6, the highest clamping voltage of U1 is 3.0V, and the minimum value is 0V; the upper limit threshold of T2 is 95℃, the lower limit threshold is 90℃, and the hysteresis value is 95℃-90℃=5℃. The probe B4 thermistor information converter 48 performs intelligent equivalent transformation on the temperature T2 to generate a voltage signal U2, which is connected to the input terminal 1C of the analog switch 55. The upper limit threshold of the corresponding voltage U2 is 2.0V, the lower limit threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship solved by the two-point formula is U=T / 10-7.5, and the highest clamping voltage of U2 is 3.0V, and the minimum value is 0V.

[0199] The analog signals U1 and U2 are transformed by Schmidt intelligent logic and then logically coupled. = + , which produces the output Terminal 36 digital signal outputs the digital signal from the rear motor system coupling temperature BO6 terminal 63 of the digital distributor 66.

[0200] The relationship between the coupled temperature and dual information of the rear motor system and the Schmidt logic conversion

[0201] Rear axle motor temperature H3 Schmitt logic conversion output :When H3<75℃, =0, when H3>80℃, =1; 75℃≤H3≤80℃, Keep the original value unchanged;

[0202] Rear controller temperature H4 Schmitt logic conversion output :When H4<90℃, =0, when H4>95℃, =1; 90℃≤H4≤95℃, Keep the original value unchanged;

[0203] The logic or relational expression of the dual information coupling transformation of the rear motor system is: ;

[0204] =1, the rear motor system coupling temperature BO6 terminal outputs high level, =0, the rear motor system coupling temperature BO6 terminal outputs a low level.

[0205] ⑶ Intelligent logic C module 79 Schmidt intelligent data processing process:

[0206] The output information of the front and rear gas sensors 29 is processed by the intelligent logic C module 79 to generate a CO7 coupled digital output signal, and the digital data information 4 is output from the gas coupling concentration CO7 terminal 6; the output information of the front and rear ambient temperature sensors 30 is processed by the intelligent logic C module 79 to generate a CO8 coupled digital output signal, and the digital data information is output from the ambient coupling temperature CO8 terminal 65.

[0207] The input terminals of the dual-information coupled Schmidt intelligent module 35 are the logic C unit Z1 terminal 81 and the logic C unit Z2 terminal 82, which are represented by U1 and U2. The upper threshold of U1 and U2 is designed to be 2.0V, the lower threshold is 1.5V, and the hysteresis value is 2.0V-1.5V=0.5V; the output terminals of the dual-information coupled Schmidt intelligent module 35 are respectively 、 .

[0208] Analog signal U1 and The logical relationship of the Schmitt trigger is

[0209] ① U1<1.5V, =0;

[0210] ② U1>2.0V, =1;

[0211] ③ 1.5V≤U1≤2.0V, Keep the original value, that is, increase from U1<1.5V to U1<2.0V, keep "U1<1.5V, =0" original value =0; From U1>2.0V, drop to U1≥1.5V, keep "U1>2.0V, =1" original value =1.

[0212] Analog signal U2 and The logical relationship of the Schmitt trigger is

[0213] ① U2<1.5V, =0;

[0214] ② U2>2.0V, =1;

[0215] ③ 1.5V≤U2≤2.0V, Keep the original value, that is, increase from U2<1.5V to U2<2.0V, keep "U2<1.5V, =0" original value =0; From U2>2.0V, drop to U2≥1.5V, maintain "U2>2.0V, =1" original value =1.

[0216] 、 The two input terminals of the OR gate are electrically connected, and the output terminal of the OR gate is the output End 80, use The logical relationship is .

[0217] The CP pulse signal 54 synchronously controls the input of the analog switch 55 and the output of the digital distributor 66. The relationship between CP and the input and output is shown in Table 3.

[0218] Table 3

[0219] .

[0220] ① CP=00 / 10, U1=0B, U2=0C, CO7= + The logical relationship is that the 0B and 0C signals are transformed by Schmidt intelligent logic and then output as logic or CO7; the front and rear gas concentrations are intelligently transformed and coupled for output.

[0221] ② CP=01 / 11, U1=1B, U2=1C, CO8= + The logical relationship is that the 1B and 1C signals are transformed by Schmidt intelligent logic and then output by logic or CO8; the front and rear ambient temperatures are intelligently transformed and coupled for output.

[0222] The front gas sensor 29 is connected to the front gas probe C1 input terminal 71, and the rear gas sensor 29 is connected to the rear gas probe C3 input terminal 75. The concentration C1 analog data and the concentration C3 analog data are Schmidt intelligently converted by the intelligent logic C module 79, and then logically or coupled. The data is output through the output QC terminal 80 and distributed to the gas coupling concentration CO7 terminal 64 by the digital distributor 66 to output the digital signal. Set the concentration C1 analog data T1 and the concentration C3 analog data T2. T1 and T2 The upper threshold value is 5%, the lower threshold value is 4.5%, and the hysteresis value is 5%-4.5%=0.5%. The probe C1 electrochemical converter 72 performs intelligent equivalent transformation on the concentration T1 to generate a voltage signal U1, which is connected to the input terminal 0B of the analog switch 55. The upper threshold value of the corresponding voltage U1 is 2.0V, the lower threshold value is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship is solved by the two-point formula as U=T-3. The highest clamping voltage of U1 is 3.0V and the minimum value is 0V.

[0223] The analog signals U1 and U2 are transformed by Schmidt intelligent logic and then logically coupled. = + , which produces the output The digital signal at terminal 80 is output from the gas coupling concentration CO7 terminal 64 of the digital distributor 66.

[0224] Gas concentration dual information coupled Schmidt logic transformation relationship

[0225] When the current gas concentration M1 is less than 4.5%, the Schmitt logic conversion output =0, when M1>5%, =1; 4.5%≤M1≤5%, Keep the original value unchanged;

[0226] When the post-gas concentration M2 is less than 4.5%, the Schmitt logic conversion output =0, when M2>5%, =1; 4.5%≤M2≤5%, Keep the original value unchanged;

[0227] Gas concentration dual information coupling transformation logic or relational expression: ;

[0228] =1, gas coupling concentration CO7 terminal output high level, =0, gas coupling concentration CO7 terminal outputs low level.

[0229] The front ambient temperature sensor 30 is connected to the front temperature probe C2 input terminal 73, and the rear ambient temperature sensor 30 is connected to the rear temperature probe C4 input terminal 77. The temperature C2 analog data and the temperature C4 analog data are subjected to Schmidt intelligent conversion through the intelligent logic C module 79, and then logically or coupled, and output through the output QC terminal 80. The digital distributor 66 distributes the digital signal to the ambient coupling temperature CO8 terminal 65; set the temperature C2 analog data T1 and the temperature C4 analog data T2, the upper limit threshold of T1 and T2 is 315℃, and the lower limit threshold is 300℃, the hysteresis value is 300℃-315℃=15℃, the probe C2 converter 74 performs intelligent equivalent transformation on T1, and the probe C4 converter 78 performs intelligent equivalent transformation on T2 to generate voltage signals U1 and U2, which are connected to the input terminals 1B and 1C of the analog switch 55. The upper limit threshold of the corresponding voltage U1 and U2 is 2.0V, the lower limit threshold is 1.5V, and the hysteresis value is 0.5V. The equivalent transformation relationship solved by the two-point formula is U=T / 30-8.5. The highest clamping voltage of U1 and U2 is 3.0V, and the minimum value is 0V.

[0230] The analog signals U1 and U2 are transformed by Schmidt intelligent logic and then logically coupled. = + , which produces the output Terminal 80 digital signal, digital signal output from the ambient coupling temperature CO8 terminal 65 of the digital distributor 66.

[0231] Ambient temperature dual information coupled Schmidt logic transformation relationship

[0232] When the current ambient temperature N1 is less than 300℃, the Schmitt logic conversion output =0, when N1>315℃, =1; 300℃≤N1≤315℃, Keep the original value unchanged;

[0233] When the ambient temperature N2 is less than 300℃, the Schmitt logic conversion output =0, when N2>315℃, =1; 300℃≤N2≤315℃, Keep the original value unchanged;

[0234] Ambient temperature dual information coupling conversion logic or relationship: ;

[0235] =1, the ambient coupling temperature CO8 terminal outputs a high level, =0, the ambient coupling temperature CO8 terminal outputs a low level.

[0236] 7. Intrinsically safe early warning system

[0237] The intrinsically safe electric loader and its intelligent conversion method of the present invention include an intrinsically safe conversion system, an intrinsically safe early warning system, and an environmental suitability display system. The intrinsically safe warning signal 86 controls the output state of the intrinsically safe conversion system, the alarm signal 87 controls the output state of the intrinsically safe early warning system, and the signal of the oxygen concentration AO3 terminal 60 controls the output state of the environmental suitability display system.

[0238] ⑴Logical relationship of intrinsically safe warning signal or gate circuit:

[0239]

[0240] in, It is an intrinsically safe warning signal 86 signal. It is the battery temperature AO1 terminal, It is the BMS temperature AO2 end, Front motor system coupling temperature BO5 end, Rear motor system coupling temperature BO6 terminal.

[0241] The logical function is that as long as 、 、 、 Not all low level 0, It is high level output; 、 、 、 All are low level 0, It is a low level output.

[0242] (2) The alarm signal or gate circuit logic relationship:

[0243]

[0244] in, It is the alarm signal 87, is the gas coupling concentration CO7 end, It is the dust density AO4 end, It is the ambient coupling temperature CO8 end;

[0245] The logical function is that as long as 、 、 Not all low level 0, It is high level output; 、 、 All are low level 0, It is a low level output.

[0246] ⑶ Intrinsically safe intelligent conversion:

[0247] The intrinsically safe transfer switch 4 is an intelligent transfer switch, including manual control and intelligent conversion functions. The data information of the sensor intelligent coupler 24 is intelligently processed by the vehicle ECU system 13 to generate instructions for controlling the dynamic closing and dynamic opening of the intrinsically safe transfer switch 4.

[0248] When the intrinsically safe warning signal 86 outputs a high level, represented by Y=1, the intrinsically safe transfer switch 4 is controlled to perform a dynamic closing operation, which is the intrinsically safe mode;

[0249] When the intrinsically safe warning signal 86 outputs a low level, Y=0, and the intrinsically safe transfer switch 4 is controlled to perform a dynamic breaking operation, which is a normal loader working mode;

[0250] When the oxygen concentration AO3 terminal 60 outputs a high level, represented by Z=1, it shows that the environment is suitable for human activities, but not conducive to preventing dust combustion and gas explosions; when Z=0, it shows that the environment is not suitable for human activities, which is conducive to preventing or eliminating dust combustion and gas explosions;

[0251] When the alarm signal 87 outputs a high level, X=1, the intrinsically safe transfer switch 4 is controlled to perform a closing operation, switching to the intrinsically safe mode, and issuing an alarm signal.

[0252] ⒏ Intrinsically safe intelligent solution for electric loaders: The intrinsically safe intelligent status is shown in Table 4.

[0253] Table 4

[0254] .

[0255] In the intrinsically safe mode of the intrinsically safe electric loader and the intelligent conversion method thereof of the present invention, the powertrain operates at the rated operating conditions or below the rated operating conditions, the operating conditions of the motor system, the battery system, and the hydraulic system do not exceed the rated conditions, the heat generated is not large, the temperature rise is not high, and no sparks occur, and the device also has the function of monitoring flammable and explosive components.

[0256] Intrinsically safe intelligent conversion steps:

[0257] (1) The oxygen sensor 27 detects that the oxygen concentration exceeds 25%. After the coupling processing system 85 performs calculations, the oxygen concentration AO3 terminal 60 outputs a high level. =1, the vehicle ECU system 13 controls the intrinsically safe warning device 3, the oxygen concentration warning light flashes green, and it is suitable for personnel to enter. The vehicle ECU system 13 processes the coupling processing system 85 to strengthen the monitoring and control of gas concentration, dust density, and high-temperature fire sources;

[0258] When the oxygen concentration is lower than 20%, the oxygen concentration AO3 terminal 60 outputs a low level through the coupled processing system 85. =0, the vehicle ECU system 13 controls the intrinsically safe warning device 3, the oxygen concentration warning light flashes yellow, it is not suitable for people to enter, and a signal is issued to open or optimize the ventilation system to increase the oxygen content.

[0259] (2) The intrinsically safe warning signal 86 outputs a high level, Q9=1, and the vehicle ECU system 13 controls the intrinsically safe conversion switch 4 to perform dynamic and closed operations to convert the intrinsically safe mode. The data information of the coupling processing system 85, the front axle transmission assembly 8, and the rear axle transmission assembly 18 are transmitted to the vehicle ECU system 13 and processed to control the front axle transmission assembly 8 and the rear axle transmission assembly 18 to downshift. When the front axle transmission assembly 8 and the rear axle transmission assembly 18 are in low gear, at the same time, the intrinsically safe warning signal 86 outputs a high level, and the vehicle ECU system 13 processes the data information to control the front and rear axle drive motors to reduce the drive power and operate under rated conditions, and then reduce the current of the high-power motor, and use the current of the low-power drive motor as the control data to reduce power, reduce heat generation, and reduce the temperature of the drive motor and the power battery.

[0260] (3) The alarm signal 87 outputs a high level. =1, the gas coupling concentration CO7 terminal 64 is high level, the ambient coupling temperature CO8 terminal 65 is low level, the gas concentration warning light flashes red, the intrinsically safe type transfer switch 4 is operated, the intrinsically safe mode is switched, the gas concentration warning buzzer alarms, emits a comfortable sound, it is not suitable for personnel to enter, and a signal is issued to open or optimize the ventilation system, reduce the gas concentration, and reduce the output power of the drive motor and hydraulic system.

[0261] (4) Alarm signal 87 outputs high level, =1, the dust density AO4 terminal 61 is high level, the ambient coupling temperature CO8 terminal 65 is low level, the dust density warning light flashes red, the intrinsically safe type transfer switch 4 is operated, and the intrinsically safe type mode is switched on. The dust density warning buzzer alarms and emits a comfortable sound, indicating that it is not suitable for personnel to enter. It is issued to open or optimize the ventilation system, reduce the dust density, and reduce the output power of the drive motor and hydraulic system.

[0262] (5) Alarm signal 87 outputs high level, =1, ambient coupling temperature CO8 terminal 65 high level, ambient temperature exceeds 315℃, gas coupling concentration CO7 terminal 64 low level, dust density AO4 terminal 61 low level, flashing red light, intrinsically safe transfer switch dynamic closing operation, conversion to intrinsically safe mode, warning buzzer alarm, emit a comfortable sound, not suitable for personnel to enter, find the high temperature heat source, reduce the ambient temperature,

[0263] (6) The alarm signal 87 outputs a high level. =1, the ambient coupling temperature CO8 terminal 65 is high, the ambient temperature exceeds 315℃, the gas coupling concentration CO7 terminal 64 is high and / or the dust density AO4 terminal 61 is high, the warning light flashes red, the intrinsically safe transfer switch is closed and switched to intrinsically safe mode, the warning buzzer sounds a harsh sound, and there is a risk of gas explosion or dust combustion explosion. Personnel must evacuate and carry out disaster relief.

[0264] The above are specific embodiments of the present invention and the technical principles used. If changes are made based on the concept of the present invention, the functional effects produced still do not exceed the spirit covered by the description and drawings, and are within the scope of protection of the patent of the present invention.

Claims

1. A method for intelligent conversion of an intrinsically safe electric loader, characterized in that: The intrinsically safe electric loader comprises a front motor vehicle assembly (1), a rear motor vehicle assembly (5), an intrinsically safe warning device (3), an intrinsically safe switching switch (4), a vehicle ECU system (13), a front sensor housing (2), a rear sensor housing (6), a sensor intelligent coupler (24), an analog switch (55), a digital distributor (66), a Schmidt intelligent circuit (56), a dual-information coupled Schmidt intelligent module (35), a probe A converter (53), a probe B converter (83), and a probe C converter (84). The front motor vehicle assembly (1) is articulated to the rear motor vehicle assembly (5), the sensor intelligent coupler (24) is placed in the body of the rear motor vehicle assembly (5), the front sensor housing (2) comprises an oxygen sensor (27), a gas sensor (29), an ambient temperature sensor (35), a pressure sensor (36), a pressure sensor (37), a pressure sensor (38), a pressure sensor (39), and a pressure sensor (40). The dust sensor (28), the gas sensor (29), and the ambient temperature sensor (30) are placed side by side. The rear sensor box (6) includes a dust sensor (28), a gas sensor (29), and an ambient temperature sensor (30), which are placed side by side. The gas sensor (29) includes a front gas sensor (29) and a rear gas sensor (29). The sensor box includes a front sensor box (2) and a rear sensor box (6). The gas sensor (29) is placed in the middle position of the sensor box. The ambient temperature sensor (30) is placed in the left position of the sensor box. The normal state of the intrinsically safe conversion switch (4) is the intrinsically safe mode and the intelligent conversion switch, including manual control and intelligent conversion functions. The sensor intelligent coupler (24) is electrically connected to the intrinsically safe alarm (3) and the intrinsically safe conversion switch (4). The sensor intelligent coupler (24) is electrically connected to the front axle motor temperature sensor (9), the rear axle motor temperature sensor (20), the front controller temperature sensor (11), the rear controller temperature sensor (16), the battery temperature sensor (21), and the BMS temperature sensor (23); the sensor intelligent coupler (24) includes an intrinsically safe warning signal (86) and an alarm signal (87); The intelligent conversion method includes: The analog data information is transmitted from the probe A converter (53) through the analog switch (55) to the Schmidt intelligent circuit (56) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); the analog data information is transmitted from the probe B converter (83) through the analog switch (55) to the dual-information coupled Schmidt intelligent module (35) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); the analog data information is transmitted from the probe C converter (84) through the analog switch (55) to the dual-information coupled Schmidt intelligent module (35) for Schmidt logic processing to obtain a digital signal, and the digital signal is output through the digital distributor (66); ⑴Oxygen content Schmidt logic digital conversion relationship: When the oxygen concentration K3 is less than 20%, the intelligent logic module A (31) outputs Q3=0 and the oxygen concentration AO3 terminal outputs a low level; when K3>25%, Q3=1 and the oxygen concentration AO3 terminal outputs a high level; 20%≤K3≤25%, Q3 maintains the original value Q3=1 or Q3=0 unchanged; when Q3=1, the oxygen concentration warning light flashes green, indicating that it is suitable for people to enter; when Q3=0, the oxygen concentration warning light flashes yellow, indicating that it is not suitable for people to enter, and a request to start or optimize the ventilation system and increase the oxygen content is issued; ⑵ Intelligent transformation method of intrinsically safe warning signal (86): ①Battery temperature Schmitt logic transformation relationship When the battery temperature K1 is less than 75°C, the intelligent logic module A (31) outputs Q1=0 and the battery temperature AO1 terminal outputs a low level; when K1>80°C, Q1=1 and the battery temperature AO1 terminal outputs a high level; when 75°C≤K1≤80°C, Q1 remains unchanged at the original value Q1=1 or Q1=0; ②BMS temperature Schmitt logic transformation relationship When the BMS temperature K2 is less than 60°C, the intelligent logic module A (31) outputs Q2=0 and the BMS temperature AO2 terminal outputs a low level. When K2>65°C, Q2=1 and the BMS temperature AO2 terminal outputs a high level. When 60°C≤K2≤65°C, Q2 maintains the original value Q2=1, Q2=0. ③ Front motor system coupled temperature dual information coupled Schmidt logic transformation relationship Front axle motor temperature H1 Schmidt logic conversion output Q H1 :When H1<75℃, Q H1 =0, when H1>80℃, Q H1 =1; 75℃≤H1≤80℃, Q H1 Keep the original value unchanged; Front controller temperature H2 Schmitt logic conversion output Q H2 :When H2<90℃, Q H2 =0, when H2>95℃, Q H2 =1; 90℃≤H2≤95℃, Q H2 Keep the original value unchanged; Front motor system dual information coupling conversion logic or relationship: Q5 = Q K1 +Q K2 ; Q5=1, the front motor system coupling temperature BO5 terminal outputs a high level, Q5=0, the front motor system coupling temperature BO5 terminal outputs a low level; ④ The relationship between the coupled temperature and dual information of the rear motor system and the Schmidt logic transformation Rear axle motor temperature H3 Schmidt logic conversion output Q H3 :When H3<75℃, Q H3 =0, when H3>80℃, Q H3 =1; 75℃≤H3≤80℃, Q H3 Keep the original value unchanged; Post-controller temperature H4 Schmitt logic conversion output Q H4 :When H4<90℃, Q H4 =0, when H4>95℃, Q H4 =1; 90℃≤H4≤95℃, Q H4 Keep the original value unchanged; The rear motor system dual information coupling conversion logic or relationship: Q6 = Q K3 +Q K4 ; When Q6=1, the rear motor system coupling temperature BO6 terminal (63) outputs a high level; when Q6=0, the rear motor system coupling temperature BO6 terminal (63) outputs a low level; ⑤ The intrinsically safe warning signal (86) or gate circuit logic coupling relationship: Among them, Q9 is the intrinsically safe warning signal (86), Q1 is the battery temperature AO1 terminal (58) signal, Q2 is the BMS temperature AO2 terminal (59) signal, Q5 is the front motor system coupling temperature BO5 terminal (62) signal, and Q6 is the rear motor system coupling temperature BO6 terminal (63) signal; When the intrinsically safe warning signal (86) outputs a high level Q9=1, the intrinsically safe conversion switch performs a dynamic closing operation, converting to the intrinsically safe mode, and the front axle gearbox assembly (8) and the rear axle gearbox assembly (18) perform a downshift operation; when the front axle gearbox assembly (8) and the rear axle gearbox assembly (18) are in a low gear, the front and rear axle drive motors reduce their output power and operate under rated working conditions, and then reduce the current of the high-output power motor, using the current of the low-power drive motor as control data, reducing power, reducing heat generation, and reducing the temperature of the drive motor and the power battery; the intrinsically safe warning light flashes yellow, playing a warning role; ⑶ Intelligent conversion method of alarm signal (87): ① Schmidt logic transformation relationship of dust density When the dust density K4 < 40g / m 3 When Q4=0 is output by intelligent logic module A (31), dust density AO4 terminal outputs low level. When K4>45g / m 3 When Q4=1, the dust density AO4 terminal (61) outputs a high level; 40g / m 3 ≤K4≤45g / m 3 , Q4 maintains the original value Q4=1, Q4=0 unchanged; ②Gas concentration dual information coupled Schmidt logic transformation relationship When the current gas concentration M1 is less than 4.5%, the Schmitt logic conversion output Q M1 =0, when M1>5%, Q M1 =1; 4.5%≤M1≤5%, Q M1 Keep the original value unchanged; When the post-gas concentration M2 is less than 4.5%, the Schmidt logic conversion output Q M2 =0, when M2>5%, Q M2 =1; 4.5%≤M2≤5%, Q M2 Keep the original value unchanged; Gas concentration dual information coupling transformation logic or relationship: Q7=Q M1 +Q M2 ; When Q7=1, the gas coupling concentration CO7 terminal (64) outputs a high level; when Q7=0, the gas coupling concentration CO7 terminal (64) outputs a low level; ③Ambient temperature dual information coupling Schmidt logic transformation relationship When the current ambient temperature N1 is less than 300℃, the Schmitt logic conversion output Q N1 =0, when N1>315℃, q N1 =1;300℃≤N1≤315℃, q N1 Keep the original value unchanged; When the ambient temperature N2 is less than 300℃, the Schmitt logic conversion output Q N2 =0, when N2>315℃, Q N2 =1; 300℃≤N2≤315℃, Q N2 Keep the original value unchanged; Ambient temperature dual information coupling conversion logic or relationship: Q8=Q N1 +Q N2 ; When Q8=1, the ambient coupling temperature CO8 terminal (65) outputs a high level; when Q8=0, the ambient coupling temperature CO8 terminal (65) outputs a low level; ③ The alarm signal (87) or gate circuit logic coupling relationship: Among them, Q X is the alarm signal (87), Q4 is the dust density AO4 terminal (61) signal, Q7 is the gas coupling concentration CO7 terminal (64) signal, and Q8 is the ambient coupling temperature CO8 terminal (65) signal; When the alarm signal (87) outputs a high level Q X =1, the intrinsically safe transfer switch is closed and switched to intrinsically safe mode. The warning light of the intrinsically safe alarm flashes red and the buzzer of the intrinsically safe alarm emits a harsh alarm sound, indicating the risk of gas explosion or dust combustion explosion. Personnel must evacuate and carry out disaster relief.

2. The intelligent conversion method of an intrinsically safe electric loader according to claim 1, characterized in that: The sensor intelligent coupler (24) includes an intelligent logic A module (31), an intelligent logic B module (32), an intelligent logic C module (79), and a coupling processing system (85). The coupling processing system (85) is the intelligent logic processing system of the sensor intelligent coupler (24). The coupling processing system (85) is internally electrically connected to the intelligent logic A module (31), the intelligent logic B module (32), and the intelligent logic C module (79). The vehicle ECU system (13) is electrically and logically connected to the sensor intelligent coupler (24). The coupling processing system (85) includes an intrinsically safe warning signal (86) and an alarm signal (87).

3. The intelligent conversion method of the intrinsically safe electric loader according to claim 2, characterized in that: The intelligent logic A module (31) includes an intelligent logic A input terminal (67), a probe A converter (53), an analog switch (55), a Schmidt intelligent circuit (56), a digital distributor (66), and an intelligent logic AO terminal (68); the probe A converter (53) includes an intelligent logic A input terminal (67), a probe A1 thermal information converter (38), a probe A2 thermal information converter (40), a probe A3 resistance converter (50), and a probe A4 photoelectric information converter (52); the intelligent logic A input terminal (67) includes a battery probe A1 input terminal (37), a BMS probe A2 input terminal (39), an oxygen probe A3 input terminal (49), and a dust probe A4 input terminal (51).

4. The intelligent conversion method for an intrinsically safe electric loader according to claim 2, characterized in that: The intelligent logic B module (32) includes an intelligent logic B input terminal (69), a probe B converter (83), an analog switch (55), a dual-information coupled Schmidt intelligent module (35), a digital distributor (66), a front motor system coupled temperature BO5 terminal (62), and a rear motor system coupled temperature BO6 terminal (63); the probe B converter (83) includes an intelligent logic B input terminal (69), a probe B1 thermal information converter (42), a probe B2 thermal information converter (44), a probe B3 thermal information converter (46), and a probe B4 thermal information converter (48); the intelligent logic B input terminal (69) includes a front motor probe B1 input terminal (41), a rear motor probe B2 input terminal (43), a front controller probe B3 input terminal (45), and a rear controller probe B4 input terminal (47).

5. The intelligent conversion method of the intrinsically safe electric loader according to claim 2, characterized in that: The intelligent logic C module (79) includes an intelligent logic C input terminal (70), a probe C converter (84), an analog switch (55), a dual-information coupled Schmidt intelligent module (35), a digital distributor (66), a gas coupled concentration CO7 terminal (64), and an ambient coupled temperature CO8 terminal (65); the probe C converter (84) includes an intelligent logic C input terminal (70), a probe C1 electrochemical converter (72), a probe C3 electrochemical converter (76), a probe C2 converter (74), and a probe C4 converter (78); the intelligent logic C input terminal (70) includes a front gas probe C1 input terminal (71), a front temperature probe C2 input terminal (73), a rear gas probe C3 input terminal (75), and a rear temperature probe C4 input terminal (77).

6. The intelligent conversion method of an intrinsically safe electric loader according to claim 1, characterized in that: The intrinsically safe alarm (3) includes a motor temperature alarm, an ambient temperature alarm, a battery temperature alarm, an oxygen concentration alarm, a dust density alarm, and a gas concentration alarm; the intrinsically safe alarm (3) includes a warning light and a warning buzzer; the warning light includes a red light, a yellow light, and a green light; the warning buzzer includes a comfortable sound buzzer and a harsh sound buzzer.

7. The intelligent conversion method for an intrinsically safe electric loader according to claim 1, characterized in that: The logical relationship of the Schmitt intelligent circuit (56) is that the analog signal U passes through the Schmitt intelligent circuit (56) and outputs the digital signal Q. The upper threshold of U is designed to be U=2.0V, the lower threshold is designed to be U=1.5V, and the hysteresis value is ΔU=2.0V-1.5V=0.5V. The logical relationship of the Schmitt trigger of the analog signal U and the digital signal Q is: ①U<1.5V,Q=0; ②U>2.0V,Q=1; ③1.5V≤U≤2.0V, Q keeps the original value, that is, from U<1.5V to U≤2.0V, keep "U<1.5V,Q A =0" original value Q = 0; from U>2.0V, drop to U≥1.5V, maintain "U>2.0V, Q A =1” original value Q=1.

8. The intelligent conversion method for an intrinsically safe electric loader according to claim 1, characterized in that: The logic relationship of the dual information coupled Schmidt intelligent module (35) is that the dual analog signals U1 and U2 pass through the intelligent circuit of the dual information coupled Schmidt intelligent module (35) to output a digital signal Q. The upper threshold of U1 and U2 is designed to be 2.0V, the lower threshold is designed to be 1.5V, and the hysteresis value is 2.0V-1.5V=0.5V; the Schmidt trigger output terminals are Q B1 , Q B2 , dual information coupled Schmidt intelligent module output Q, Analog signal U1 and Q B1 The logical relationship of the Schmitt trigger is: ①U1<1.5V,Q B1 =0; ②U1>2.0V,Q B1 =1; ③1.5V≤U1≤2.0V,Q B1 Keep the original value, that is, increase from U1<1.5V to U1≤2.0V, keep "U1<1.5V,Q B1 =0" original value Q B1 =0; from U1>2.0V, drop to U1≥1.5V, maintain "U1>2.0V,Q B1 =1" original value Q B1 =1; Analog signal U2 and Q B2 The logical relationship of the Schmitt trigger is: ①U2<1.5V,Q B2 =0; ②U2>2.0V,Q B2 =1; ③1.5V≤U2≤2.0V,Q B2 Keep the original value, that is, increase from U2<1.5V to U2≤2.0V, keep "U2<1.5V,Q B2 =0" original value Q B2 =0; from U2>2.0V, drop to U2≥1.5V, maintain "U2>2.0V,Q B2 =1" original value Q B2 =1; The logical relationship of the dual information coupled OR gate intelligent output Q is:

9. The intelligent conversion method for an intrinsically safe electric loader according to claim 1, characterized in that: The CP pulse signal of the analog switch (55) and the digital distributor (66) is electrically connected to the quaternary frequency divider signal, the frequency of the quaternary frequency divider signal is 128 Hz, the four input signal terminals of the analog switch (55) are time-sharing input, the sampling frequency of each input signal is 128 Hz, the input frequency of each signal is 32 Hz, the duty cycle of the input signal is 25%, which is greater than 24 Hz recognized by the human eye, the four output terminals of the digital distributor are time-sharing output, and the method of synchronously controlling the analog switch (55) and the digital distributor (66) by the CP pulse signal is as follows: ① The first pulse CP=00, the first input terminal inputs an analog signal, and the first output terminal outputs a digital signal; ② The second pulse CP=01, the second input terminal inputs an analog signal, and the second output terminal outputs a digital signal; ③ The third pulse CP=10, the third input terminal inputs an analog signal, and the third output terminal outputs a digital signal; ④ The 4th pulse CP=11, the 4th input terminal inputs an analog signal, and the 4th output terminal outputs a digital signal.

Images