Controller circuit and device

Abstract

The utility model relates to the technical field of electronic circuits, in particular to a controller circuit and device, and the controller circuit comprises a DC converter circuit, a power protection circuit, a controller, and a communication isolation circuit of each communication device. The power supply protection circuit can pull down the stabilized voltage to 0V when the stabilized voltage obtained by conversion of the DC converter circuit exceeds a preset stabilized voltage threshold value, so as to realize overvoltage protection for a controller and / or a communication device; moreover, the communication isolation circuit can effectively isolate the controller circuit from the external circuit, so that the problem that the control circuit explodes under the condition that the voltage of the external circuit is too high or the external circuit has open fire is avoided, and the explosion-proof effect is achieved on the premise that an explosion-proof shell does not need to be arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a controller circuit and a device. Background Art

[0002] In recent years, explosion-proof products have gradually become an important part of the coal mining industry; the application of explosion-proof products has also greatly improved the intelligence level of the coal mining industry. However, in the current control system of the coal mining industry, the isolation explosion-proof shell is generally used, and the circuit where the controller is located does not have the ability of explosion-proof isolation. Therefore, in the coal mining industry, the controller circuit has the disadvantages of large size, high power consumption, single function, and can only use explosion-proof shells. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a controller circuit and device, which can isolate the controller circuit from the external circuit through a power protection circuit and a communication isolation circuit without setting up an explosion-proof housing to achieve an explosion-proof effect.

[0004] In a first aspect, the utility model provides a controller circuit, the controller circuit comprising: a DC converter circuit, a power protection circuit, a controller, and a communication isolation circuit for each communication device;

[0005] The power input end of the DC converter circuit is used to receive an intrinsically safe power supply, and the power output end of the DC converter circuit is connected to the power input end of the power protection circuit;

[0006] The voltage output terminal of the power protection circuit is respectively connected to the voltage input port of the controller and / or each communication device;

[0007] Each communication port of the controller is connected to the communication isolation circuit of each communication device respectively.

[0008] Optionally, the power supply protection circuit includes multiple groups of first overvoltage protection circuits arranged in parallel; the input ends of the multiple groups of first overvoltage protection circuits are connected in parallel to a first parallel node, and the first parallel node serves as the power input end and the power output end of the power supply protection circuit; the output ends of the multiple groups of first overvoltage protection circuits are connected in parallel to a second parallel node, and the second parallel node serves as the ground end of the power supply protection circuit.

[0009] Optionally, the first overvoltage protection circuit includes a first voltage stabilizing diode, a first resistor and a first thyristor diode;

[0010] The cathode of the first voltage zener diode is connected to the first main electrode of the first thyristor diode as the input end of the first overvoltage protection circuit; the anode of the first voltage zener diode is connected to the first end of the first resistor; the second end of the first resistor is connected to the second main electrode of the first thyristor diode as the output end of the first overvoltage protection circuit; the control electrode of the first thyristor diode is connected between the anode of the first voltage zener diode and the first end of the first resistor.

[0011] Optionally, the DC converter circuit includes a first capacitor C in , regulating chip U1, switching transformer T1, field effect tube Q1, second voltage regulator diode D OUT , the second capacitor C OUT , the first light emitting diode OP 1-B , Phototransistor OP 1-A , the second resistor R MODE , the third resistor R SENSE , the fourth resistor R OVH , the fifth resistor R OVL , the sixth resistor R T , the seventh resistor R FB , the third voltage zener diode D FB , the third capacitor C VCC And the fourth capacitor C SS ;

[0012] The first capacitor C in The first end of the first capacitor C is connected to the power input end of the DC converter circuit and the eighth pin of the regulating chip U1 respectively. in The second end of is grounded;

[0013] The first end of the switch transformer T1 is connected to the eighth pin of the regulating chip U1, the second end of the switch transformer T1 is connected to the drain of the field effect transistor Q1, and the third end of the switch transformer T1 is connected to the second voltage regulator diode D OUT The fourth end of the switching transformer T1 is grounded, and the fifth end of the switching transformer T1 is connected to the fourth resistor R OVH The first end of the switching transformer T1 is connected to the ground; the sixth end of the switching transformer T1 is grounded;

[0014] The gate of the field effect tube Q1 is connected to the tenth pin of the regulating chip U1, and the source of the field effect tube Q1 is connected to the third resistor R SENSE A first end is connected;

[0015] The second voltage zener diode D OUT The negative electrode of the second capacitor C OUTThe first end of the capacitor C is connected to the power output end of the DC converter circuit, and the second capacitor C OUT The second end of is grounded;

[0016] The first light emitting diode OP 1-B The positive electrode and the seventh resistor R FB The first end of the first light emitting diode OP is connected 1-B The cathode of the third voltage zener diode D FB The positive electrode of the seventh resistor R FB The second end of the second voltage zener diode D OUT between the negative electrode of and the power output terminal of the DC converter circuit; the third voltage stabilizing diode D FB The negative pole is grounded;

[0017] The phototransistor OP 1-A The collector of the phototransistor OP is connected to the third pin of the regulating chip U1. 1-A The emitter is grounded;

[0018] The second resistor R MODE The first end of the second resistor R MODE The second end is connected to the source of the field effect transistor Q1 and the third resistor R SENSE The third resistor R SENSE The second end is respectively connected to the first pin of the regulating chip U1 and the ground terminal;

[0019] The fourth resistor R OVH The second end is respectively connected to the fourth pin of the regulating chip U1 and the fifth resistor R OVL The first end of the fifth resistor R OVL The second end of is grounded;

[0020] The sixth resistor R T The first end of the sixth resistor R T The second end of is grounded;

[0021] The third capacitor C VCC The first end of the third capacitor C is connected to the ninth pin of the regulating chip U1. VCC The second end of is grounded;

[0022] The fourth capacitor C SS The first end of the fourth capacitor C is connected to the sixth pin of the regulating chip U1, and the fourth capacitor C SS The second end is grounded.

[0023] Optionally, the communication device includes one or more of an RS485 chip, an RS232 chip, a CAN bus, and an Ethernet LAN.

[0024] Optionally, the communication isolation circuit includes a current isolation chip and a second overvoltage protection circuit;

[0025] The input end of the second overvoltage protection circuit is connected to the external circuit, and the output end of the second overvoltage protection circuit is connected to the input pin of the current isolation chip;

[0026] The output pin of the current isolation chip is connected to the input pin of the communication device.

[0027] Optionally, when the communication device is an RS485 chip, the second overvoltage protection circuit includes an eighth resistor R 73 、The ninth resistor R 72 , the tenth resistor R 70 11th resistor R 71 , the fourth voltage zener diode DZ 71 、Fifth voltage zener diode DZ 72 、The sixth voltage zener diode DZ 73 , the seventh voltage zener diode DZ 74 、First fuse FU 70 And the second fuse FU 71 ;

[0028] The eighth resistor R 73 The first end of the second overvoltage protection circuit and the first output end of the tenth resistor R 70 The first end of the eighth resistor R 73 The second end of is grounded;

[0029] The fourth voltage stabilizing diode DZ 71 The negative electrode is connected to the tenth resistor R 70 The second end and the fifth Zener diode DZ 72 The cathode of the fourth Zener diode DZ is connected 71 The positive electrode of the fifth voltage stabilizing diode DZ is grounded; 72 The positive pole is grounded;

[0030] The first fuse FU 70 The first end of the fifth voltage zener diode DZ 72 The negative terminal of the first fuse FU 70 The second end of is connected to the first input end of the second overvoltage protection circuit;

[0031] The ninth resistor R 72The first end is respectively connected to the second output end of the second overvoltage protection circuit and the eleventh resistor R 71 The first end of the ninth resistor R 72 The second end is connected to a power source;

[0032] The sixth voltage zener diode DZ 73 The negative electrode of each resistor R 71 The second end and the seventh voltage zener diode DZ 74 The negative electrode of the sixth Zener diode DZ is connected 73 The positive electrode is grounded; the seventh voltage stabilizing diode DZ 74 The positive pole is grounded;

[0033] The second fuse FU 71 The first end of the seventh voltage zener diode DZ 74 The negative terminal of the second fuse FU 71 The second end of the overvoltage protection circuit is connected to the second input end of the second overvoltage protection circuit.

[0034] Optionally, when the communication device is a CAN bus, the second overvoltage protection circuit includes a twelfth resistor R 80 、Thirteenth resistor R 81 、The eighth voltage zener diode DZ 81 、Ninth voltage zener diode DZ 82 、The tenth voltage zener diode DZ 83 11. Zener diode DZ 84 、Third fuse FU 80 And the fourth fuse FU 81 ;

[0035] The twelfth resistor R 80 The first end is connected to the third output end of the second overvoltage protection circuit;

[0036] The eighth voltage zener diode DZ 81 The negative electrode is connected to the twelfth resistor R 80 The second end and the ninth voltage zener diode DZ 82 The negative electrode of the eighth Zener diode DZ is connected 81 The positive pole of the ninth voltage zener diode DZ is grounded. 82 The positive pole is grounded;

[0037] The third fuse FU 80 The first end of the ninth voltage zener diode DZ 82 The negative pole of the third fuse FU 80 The second end of the overvoltage protection circuit is connected to the third input end of the second overvoltage protection circuit;

[0038] The thirteenth resistor R 81 A first end is connected to a fourth output end of the second overvoltage protection circuit;

[0039] The tenth voltage zener diode DZ 83 The negative electrode is connected to the thirteenth resistor R 81 The second end and the eleventh voltage zener diode DZ 84 The negative electrode of the tenth Zener diode DZ is connected 83 The positive pole of the eleventh Zener diode DZ is grounded. 84 The positive pole is grounded;

[0040] The fourth fuse FU 81 The first end of the eleventh voltage zener diode DZ 84 The negative pole of the fourth fuse FU 81 The second end of is connected to the fourth input end of the second overvoltage protection circuit.

[0041] Optionally, the communication device further includes an RF433 chip, and the communication isolation circuit includes a fifth capacitor C8, a sixth capacitor C9, and a seventh capacitor C 13 And the eighth capacitor C 14 ;

[0042] The first input end of the communication isolation circuit is connected to the first end of the fifth capacitor C8, the second end of the fifth capacitor C8 is connected to the first end of the sixth capacitor C9, and the second end of the sixth capacitor C9 is grounded;

[0043] The second input terminal of the communication isolation circuit is connected to the seventh capacitor C 13 The first end of the seventh capacitor C 13 The second end of the eighth capacitor C 14 The first end of the eighth capacitor C 14 The second end is connected to the input pin of the RF433 chip.

[0044] In a second aspect, an embodiment of the present application provides a mine device, which includes the above-mentioned controller circuit.

[0045] The purpose of the present application is to provide a controller circuit and device, wherein the controller circuit includes: a DC converter circuit, a power protection circuit, a controller, and a communication isolation circuit for each communication device, wherein the power protection circuit can pull down the regulated voltage converted by the DC converter circuit to 0V when the regulated voltage exceeds a preset regulated voltage threshold, so as to achieve overvoltage protection for the controller MCU and / or the communication device; and the communication isolation circuit can also effectively isolate the controller circuit from the external circuit, thereby avoiding the problem of explosion of the control circuit caused by excessive voltage in the external circuit or open flame in the external circuit, thereby achieving an explosion-proof effect without setting up an explosion-proof housing.

[0046] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 A schematic diagram of a controller circuit provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of a DC converter circuit provided in an embodiment of the present application;

[0051] Figure 3 A schematic diagram of a power protection circuit provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram of a first overvoltage protection circuit provided in an embodiment of the present application;

[0053] Figure 5 One of the schematic diagrams of the communication isolation circuit provided in the embodiment of the present application;

[0054] Figure 6 One of the schematic diagrams of the second overvoltage protection circuit provided in the embodiment of the present application;

[0055] Figure 7 A second schematic diagram of a second overvoltage protection circuit provided in an embodiment of the present application;

[0056] Figure 8 This is a second schematic diagram of the communication isolation circuit provided in the embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to make the technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. The components of the embodiments of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0058] Please also see Figure 1 , Figure 1 A schematic diagram of a controller circuit provided in an embodiment of the present application, wherein the controller circuit 100 includes: a DC converter circuit 110, a power protection circuit 120, a controller 130, and a communication isolation circuit 140 for each communication device;

[0059] The power input terminal of the DC converter circuit 110 is used to receive an intrinsically safe power supply, and the power output terminal of the DC converter circuit 110 is connected to the power input terminal of the power protection circuit 120;

[0060] The voltage output terminal of the power protection circuit 120 is respectively connected to the voltage input port of the controller 130 (MCU) and / or each communication device (not shown in the figure);

[0061] Each communication port of the controller 130 (MCU) is respectively connected to the communication isolation circuit 140 of each communication device;

[0062] The DC converter circuit 110 is used to convert the intrinsically safe power supply into a regulated voltage of a specific volt, and input the regulated voltage to the power protection circuit 120 through the power output terminal;

[0063] The power protection circuit 120 is used to pull down the regulated voltage to 0V when the regulated voltage exceeds a preset regulated voltage threshold, and output the regulated voltage or the lowered regulated voltage to the controller 130 and / or the communication device (not shown in the figure) through the voltage output terminal;

[0064] Here, for each communication device provided in the controller circuit, the communication isolation circuit of the communication device can be used to isolate the communication device and the control circuit from the external circuit when the external circuit is in a high voltage state, so as to avoid the problem of explosion of the control circuit caused by excessive voltage in the external circuit or open flame in the external circuit. In this way, an explosion-proof effect can be achieved without setting up an explosion-proof casing.

[0065] See also Figure 2 , Figure 2 Schematic diagram of a DC converter circuit provided in an embodiment of the present application. Figure 2 As shown, the DC converter circuit 110 includes a first capacitor 1101 (C in ), regulating chip 1102 (U1), switching transformer 1103 (T1), field effect transistor 1104 (Q1), second voltage regulator diode 1105 (D OUT ), the second capacitor 1106 (C OUT )、the first light emitting diode 1107 (OP 1-B ), phototransistor 1108 (OP 1-A )、The second resistor 1109 (R MODE )、the third resistor 1110 (R SENSE )、the fourth resistor 1111 (R OVH ), the fifth resistor 1112 (R OVL )、the sixth resistor 1113 (R T )、the seventh resistor 1114 (R FB )、The third voltage stabilizing diode 1115 (D FB ), the third capacitor 1116 (C VCC ) and the fourth capacitor 1117 (C SS );

[0066] The first capacitor 1101 (C in ) are respectively connected to the power input terminal of the DC converter circuit 110 and the eighth pin of the regulating chip 1102 (U1), and the first capacitor 1101 (C in )'s second end is grounded;

[0067] The first end of the switch transformer 1103 (T1) is connected to the eighth pin of the regulating chip 1102 (U1), the second end of the switch transformer 1103 (T1) is connected to the drain of the field effect transistor 1104 (Q1), and the third end of the switch transformer 1103 (T1) is connected to the second voltage regulator diode D OUT The positive electrode of the switch transformer 1103 (T1) is connected, the fourth end of the switch transformer 1103 (T1) is grounded, and the fifth end of the switch transformer 1103 (T1) is connected to the fourth resistor 1111 (R OVH ), and a sixth end of the switching transformer 1103 (T1) is grounded;

[0068] The gate of the field effect tube 1104 (Q1) is connected to the tenth pin of the regulating chip 1102 (U1), and the source of the field effect tube 1104 (Q1) is connected to the third resistor 1110 (R SENSE ) is connected to the first end;

[0069] The second voltage stabilizing diode 1105 (D OUT ) are connected to the negative electrode of the second capacitor 1106 (C OUT ) is connected to the power output terminal of the DC converter circuit 110, and the second capacitor 1106 (C OUT )'s second end is grounded;

[0070] The first light emitting diode 1107 (OP 1-B ) and the positive electrode of the seventh resistor 1114 (R FB ) is connected to the first end of the first light emitting diode 1107 (OP 1-B ) and the cathode of the third voltage stabilizing diode 1115 (D FB ) is connected to the positive electrode, the seventh resistor 1114 (R FB ) is connected to the second voltage stabilizing diode 1105 (D OUT ) between the negative electrode and the power output terminal of the DC converter circuit; the third voltage stabilizing diode 1115 (D FB )’s negative pole is grounded;

[0071] The phototransistor 1108 (OP 1-A ) is connected to the third pin of the regulating chip 1102 (U1), and the phototransistor 1108 (OP 1-A ) has its emitter grounded;

[0072] The second resistor 1109 (R MODE ) is connected to the seventh pin of the regulating chip 1102 (U1), and the second resistor 1109 (R MODE) is connected to the source of the field effect transistor 1104 (Q1) and the third resistor 1110 (R SENSE ) between the first end of the third resistor 1110 (R SENSE ) are respectively connected to the first pin of the regulating chip 1102 (U1) and the ground terminal;

[0073] The fourth resistor 1111 (R OVH ) are connected to the fourth pin of the regulating chip 1102 (U1) and the fifth resistor 1112 (R OVL ) is connected to the first end of the fifth resistor 1112 (R OVL )'s second end is grounded;

[0074] The sixth resistor 1113 (R T ) is connected to the second pin of the regulating chip 1102 (U1), and the sixth resistor 1113 (R T )'s second end is grounded;

[0075] The third capacitor 1116 (C VCC ) is connected to the ninth pin of the regulating chip 1102 (U1), and the third capacitor 1116 (C VCC )'s second end is grounded;

[0076] The fourth capacitor 1117 (C SS ) is connected to the sixth pin of the regulating chip 1102 (U1), and the fourth capacitor 1117 (C SS ) is grounded.

[0077] Here, the intrinsically safe power supply (ie, DC power supply) of 5 to 35 V is input from the power input terminal (VIN) of the DC converter circuit 110 and passes through the first capacitor 1101 (C in ) is filtered and input to the regulating chip 1102 (U1) and the switching transformer 1103 (T1). After receiving the capacitor signal, the regulating chip 1102 (U1) is responsible for outputting a preset adjustable width pulse signal through a specific pin to control the conduction and shutdown of the field effect tube 1104 (Q1). The function of the switching transformer 1103 (T1) is to convert the pulse magnetic field into a secondary voltage through the second voltage regulator diode 1105 (D OUT ) is rectified and then output. The second capacitor 1106 (C OUT ) is used to filter the converted voltage again to form a stable regulated voltage for output. If it is necessary to output multiple regulated voltages (multiple regulated voltages have different voltage values), multiple DC converter circuits 110 can be set to convert regulated voltages with different voltage values.

[0078] When the output voltage increases, the current flows through the first light emitting diode 1107 (OP 1-B ) increases, at this time, the phototransistor 1108 (OP 1-A ) increases, pulling down the potential of the third pin of the regulating chip 1102 (U1), and the pulse width output by the regulating chip 1102 (U1) is automatically reduced to achieve the effect of reducing the output voltage.

[0079] The second resistor 1109 (R MODE ) and the third resistor 1110 (R SENSE ) is a protective resistor used to protect the field effect transistor 1104 (Q1). The fourth resistor 1111 (R OVH ) and the fifth resistor 1112 (R OVL ) is a voltage dividing resistor, which is used to feedback the working state of the switching transformer 1103 (T1). When the output voltage of the switching transformer 1103 (T1) is too high, the fourth resistor 1111 (R OVH ) and the fifth resistor 1112 (R OVL ) will adjust the output pulse width of the regulating chip 1102 (U1) through the fourth pin FB of the regulating chip 1102 (U1), so as to reduce the output voltage of the transformer.

[0080] See also Figure 3 , Figure 3 Schematic diagram of a power protection circuit provided in an embodiment of the present application. Figure 3 As shown, the power protection circuit 120 includes a plurality of groups of first overvoltage protection circuits 121 arranged in parallel; the input ends of the plurality of groups of first overvoltage protection circuits 121 are connected in parallel to a first parallel node, and the first parallel node serves as a power input end and a power output end of the power protection circuit 120; the output ends of the plurality of groups of first overvoltage protection circuits 121 are connected in parallel to a second parallel node, and the second parallel node serves as a ground end of the power protection circuit 120;

[0081] The first overvoltage protection circuit 121 is turned on when the regulated voltage exceeds a preset regulated voltage threshold, so as to pull the regulated voltage down to 0V.

[0082] See also Figure 4 , Figure 4 Schematic diagram of a first overvoltage protection circuit provided in an embodiment of the present application. Figure 4 As shown, the first overvoltage protection circuit 121 includes a first voltage stabilizing diode 1211, a first resistor 1212 and a first thyristor diode 1213;

[0083] The cathode of the first voltage-regulating diode 1211 is connected to the first main electrode of the first thyristor diode 1213 as the input end of the first overvoltage protection circuit 121; the anode of the first voltage-regulating diode 1211 is connected to the first end of the first resistor 1212; the second end of the first resistor 1212 is connected to the second main electrode of the first thyristor diode 1213 as the output end of the first overvoltage protection circuit 121; the control electrode of the first thyristor diode 1213 is connected between the anode of the first voltage-regulating diode 1211 and the first end of the first resistor 1212.

[0084] Here, if the regulated voltage converted by the DC converter circuit 110 exceeds the preset regulated threshold of the zener diode, the first thyristor diode 1213 in a first overvoltage protection circuit 121 in the power protection circuit 120 will be electrically turned on, thereby pulling the regulated voltage down to 0V.

[0085] Among them, considering that different communication devices and controllers require different regulated voltages, a corresponding power protection circuit 120 can be set for each communication device, controller and other devices respectively; that is, multiple power protection circuits 120 can be set to lower the regulated voltages of different voltage values.

[0086] Optionally, the communication device includes one or more of an RS485 chip, an RS232 chip, a CAN bus, and an Ethernet LAN.

[0087] See also Figure 5 , Figure 5 This is one of the schematic diagrams of the communication isolation circuit provided in the embodiment of the present application. Figure 5 As shown, the communication isolation circuit 140 includes a current isolation chip 141 and a second overvoltage protection circuit 142;

[0088] The input end of the second overvoltage protection circuit 142 is connected to the external circuit, and the output end of the second overvoltage protection circuit 142 is connected to the input pin of the current isolation chip 141;

[0089] The output pin of the current isolation chip 141 is connected to the input pin of the communication device (not shown in the figure).

[0090] See also Figure 6 , Figure 6 This is one of the schematic diagrams of the second overvoltage protection circuit provided in the embodiment of the present application. Figure 6 As shown, when the communication device is an RS485 chip, the second overvoltage protection circuit 142 includes an eighth resistor 14201 (R 73 )、The ninth resistor 14202 (R 72)、The tenth resistor 14203 (R 70 )、eleventh resistor 14204 (R 71 )、The fourth voltage stabilizing diode 14205 (DZ 71 )、The fifth voltage stabilizing diode 14206 (DZ 72 )、The sixth voltage zener diode 14207 (DZ 73 )、The seventh voltage zener diode 14208 (DZ 74 )、First fuse 14209(FU 70 ) and the second fuse 14210 (FU 71 );

[0091] The eighth resistor 14201 (R 73 ) are connected to the first output terminal of the second overvoltage protection circuit 142 and the tenth resistor 14203 (R 70 ) is connected to the first end of the eighth resistor 14201 (R 73 )'s second end is grounded;

[0092] The fourth voltage stabilizing diode 14205 (DZ 71 ) are connected to the negative electrode of the tenth resistor 14203 (R 70 ) and the second end of the fifth voltage stabilizing diode 14206 (DZ 72 ) is connected to the cathode of the fourth voltage stabilizing diode 14205 (DZ 71 ) is grounded; the fifth voltage stabilizing diode 14206 (DZ 72 )’s positive pole is grounded;

[0093] The first fuse 14209 (FU 70 ) and the first end of the fifth voltage stabilizing diode 14206 (DZ 72 ) is connected to the negative pole, the first fuse 14209 (FU 70 ) is connected to the first input terminal of the second overvoltage protection circuit 142;

[0094] The ninth resistor 14202 (R 72 ) are connected to the second output end of the second overvoltage protection circuit 142 and the eleventh resistor 14204 (R 71 ) is connected to the first end of the ninth resistor 14202 (R 72 )'s second end is connected to a power source;

[0095] The sixth voltage stabilizing diode 14207 (DZ 73 ) are connected to the negative electrode of the eleventh resistor 14204 (R 71) and the second end of the seventh voltage zener diode 14208 (DZ 74 ) is connected to the cathode of the sixth voltage stabilizing diode 14207 (DZ 73 ) has its positive electrode grounded; the seventh voltage stabilizing diode 14208 (DZ 74 )’s positive pole is grounded;

[0096] The second fuse 14210 (FU 71 ) and the first end of the seventh voltage zener diode 14208 (DZ 74 ) is connected to the negative pole, the second fuse 14210 (FU 71 ) is connected to the second input terminal of the second overvoltage protection circuit 142.

[0097] See also Figure 7 , Figure 7 This is a second schematic diagram of a second overvoltage protection circuit provided in an embodiment of the present application. Figure 7 As shown, when the communication device is a CAN bus, the second overvoltage protection circuit 142 includes a twelfth resistor 14211 (R 80 )、The thirteenth resistor 14212 (R 81 )、Eighth Zener diode 14213 (DZ 81 )、Ninth Zener diode 14214 (DZ 82 )、The tenth voltage zener diode 14215 (DZ 83 ), the eleventh voltage regulator diode 14216 (DZ 84 )、The third fuse 14217 (FU 80 ) and the fourth fuse 14218 (FU 81 );

[0098] The twelfth resistor 14211 (R 80 ) is connected to the third output terminal of the second overvoltage protection circuit 142;

[0099] The eighth voltage stabilizing diode 14213 (DZ 81 ) are connected to the negative electrode of the twelfth resistor 14211 (R 80 ) and the second end of the ninth voltage zener diode 14214 (DZ 82 ) is connected to the cathode of the eighth voltage zener diode 14213 (DZ 81 ) is grounded, and the ninth voltage stabilizing diode 14214 (DZ 82 )’s positive pole is grounded;

[0100] The third fuse 14217 (FU 80 ) and the first end of the ninth voltage zener diode 14214 (DZ82 ) is connected to the negative pole, the third fuse 14217 (FU 80 ) is connected to the third input terminal of the second overvoltage protection circuit 142;

[0101] The thirteenth resistor 14212 (R 81 ) is connected to a fourth output terminal of the second overvoltage protection circuit;

[0102] The tenth voltage stabilizing diode 14215 (DZ 83 ) are connected to the negative electrode of the thirteenth resistor 14212 (R 81 ) and the eleventh voltage stabilizing diode 14216 (DZ 84 ) is connected to the cathode of the tenth voltage zener diode 14215 (DZ 83 ) is grounded, and the eleventh voltage stabilizing diode 14216 (DZ 84 )’s positive pole is grounded;

[0103] The fourth fuse 14218 (FU 81 ) and the first end of the eleventh voltage stabilizing diode 14216 (DZ 84 ) is connected to the negative pole, the fourth fuse 14218 (FU 81 ) is connected to the fourth input terminal of the second overvoltage protection circuit 142.

[0104] The current isolation chip 141 is an isolation communication chip. This type of isolation chip has a variety of different functions to be selected and is used to isolate communication devices and overvoltage protection circuits. The voltage regulator diode mainly has the function of preventing the line from overvoltage, and the fuse is to disconnect the connection between the controller circuit and the external circuit in time when the external circuit enters the high voltage state by mistake.

[0105] See also Figure 8 , Figure 8 This is a second schematic diagram of a communication isolation circuit provided in an embodiment of the present application. Figure 8 As shown, the communication device also includes an RF433 chip, and the communication isolation circuit includes a fifth capacitor 143 (C8), a sixth capacitor 144 (C9), and a seventh capacitor 145 (C 13 ) and the eighth capacitor 146 (C 14 );

[0106] The first input terminal of the communication isolation circuit 140 is connected to the first terminal of the fifth capacitor 143 (C8), the second terminal of the fifth capacitor 143 (C8) is connected to the first terminal of the sixth capacitor 144 (C9), and the second terminal of the sixth capacitor 144 (C9) is grounded;

[0107] The second input terminal of the communication isolation circuit 140 is connected to the seventh capacitor 145 (C 13 ) is connected to the first end of the seventh capacitor 145 (C 13 ) and the second end of the eighth capacitor 146 (C 14 ) is connected to the first end of the eighth capacitor 146 (C 14 ) is connected to the input pin of the RF433 chip.

[0108] Here, the RF433 chip has a serial port to wireless transceiver function, and it can directly use a wireless 433MHZ signal to transmit data point-to-point. The RF433 chip uses a fifth capacitor 143 (C8), a sixth capacitor 144 (C9), a seventh capacitor 145 (C13), and an eighth capacitor 146 (C14) to isolate the controller circuit from the external circuit in a capacitive manner.

[0109] The first input terminal and the second input terminal of the communication isolation circuit 140 are connected to an external circuit through a plug.

[0110] The present application also provides a mine device, wherein the mine device is provided with a controller circuit 100 (such as Figure 1 shown).

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalent; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments instead of other features, the combination of features of different embodiments means that they are within the scope of the utility model and form different embodiments. For example, in the above claims, any one of the embodiments claimed for protection can be used in any combination. The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the utility model, and should not be regarded as admitting or suggesting in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A controller circuit, characterized in that: The controller circuit includes: a DC converter circuit, a power protection circuit, a controller, and a communication isolation circuit for each communication device; The power input end of the DC converter circuit is used to receive an intrinsically safe power supply, and the power output end of the DC converter circuit is connected to the power input end of the power protection circuit; The voltage output terminal of the power protection circuit is respectively connected to the voltage input port of the controller and / or each communication device; Each communication port of the controller is connected to the communication isolation circuit of each communication device respectively.

2. The controller circuit according to claim 1, characterized in that The power supply protection circuit includes multiple groups of first overvoltage protection circuits arranged in parallel; the input ends of the multiple groups of first overvoltage protection circuits are connected in parallel to a first parallel node, and the first parallel node serves as the power supply input end and the power supply output end of the power supply protection circuit; the output ends of the multiple groups of first overvoltage protection circuits are connected in parallel to a second parallel node, and the second parallel node serves as the ground end of the power supply protection circuit.

3. The controller circuit according to claim 2, characterized in that The first overvoltage protection circuit includes a first voltage stabilizing diode, a first resistor and a first thyristor diode; The cathode of the first voltage zener diode is connected to the first main electrode of the first thyristor diode as the input end of the first overvoltage protection circuit; the anode of the first voltage zener diode is connected to the first end of the first resistor; the second end of the first resistor is connected to the second main electrode of the first thyristor diode as the output end of the first overvoltage protection circuit; the control electrode of the first thyristor diode is connected between the anode of the first voltage zener diode and the first end of the first resistor.

4. The controller circuit according to claim 1, characterized in that The DC converter circuit includes a first capacitor C in , regulating chip U1, switching transformer T1, field effect tube Q1, second voltage regulator diode D OUT , the second capacitor C OUT , the first light emitting diode OP 1-B , Phototransistor OP 1-A , the second resistor R MODE , the third resistor R SENSE , the fourth resistor R OVH , the fifth resistor R OVL , the sixth resistor R T , the seventh resistor R FB , the third voltage zener diode D FB , the third capacitor C VCC And the fourth capacitor C SS ; The first capacitor C in The first end of the first capacitor C is connected to the power input end of the DC converter circuit and the eighth pin of the regulating chip U1 respectively. in The second end of is grounded; The first end of the switch transformer T1 is connected to the eighth pin of the regulating chip U1, the second end of the switch transformer T1 is connected to the drain of the field effect transistor Q1, and the third end of the switch transformer T1 is connected to the second voltage regulator diode D OUT The fourth end of the switching transformer T1 is grounded, and the fifth end of the switching transformer T1 is connected to the fourth resistor R OVH The first end of the switching transformer T1 is connected to the ground; the sixth end of the switching transformer T1 is grounded; The gate of the field effect tube Q1 is connected to the tenth pin of the regulating chip U1, and the source of the field effect tube Q1 is connected to the third resistor R SENSE A first end is connected; The second voltage zener diode D OUT The negative electrode of the second capacitor C OUT The first end of the capacitor C is connected to the power output end of the DC converter circuit, and the second capacitor C OUT The second end of is grounded; The first light emitting diode OP 1-B The positive electrode and the seventh resistor R FB The first end of the first light emitting diode OP is connected 1-B The cathode of the third voltage zener diode D FB The positive electrode of the seventh resistor R FB The second end of the second voltage zener diode D OUT between the negative electrode of and the power output terminal of the DC converter circuit; the third voltage stabilizing diode D FB The negative pole is grounded; The phototransistor OP 1-A The collector of the phototransistor OP is connected to the third pin of the regulating chip U1. 1-A The emitter is grounded; The second resistor R MODE The first end of the second resistor R MODE The second end is connected to the source of the field effect transistor Q1 and the third resistor R SENSE The third resistor R SENSE The second end is respectively connected to the first pin of the regulating chip U1 and the ground terminal; The fourth resistor R OVH The second end is respectively connected to the fourth pin of the regulating chip U1 and the fifth resistor R OVL The first end of the fifth resistor R OVL The second end of is grounded; The sixth resistor R T The first end of the sixth resistor R T The second end of is grounded; The third capacitor C VCC The first end of the third capacitor C is connected to the ninth pin of the regulating chip U1. VCC The second end of is grounded; The fourth capacitor C SS The first end of the fourth capacitor C is connected to the sixth pin of the regulating chip U1, and the SS The second end is grounded.

5. The controller circuit according to claim 1, characterized in that The communication device includes one or more of an RS485 chip, an RS232 chip, a CAN bus and an Ethernet LAN.

6. The controller circuit according to claim 1, characterized in that The communication isolation circuit includes a current isolation chip and a second overvoltage protection circuit; The input end of the second overvoltage protection circuit is connected to the external circuit, and the output end of the second overvoltage protection circuit is connected to the input pin of the current isolation chip; The output pin of the current isolation chip is connected to the input pin of the communication device.

7. The controller circuit according to claim 6, characterized in that When the communication device is an RS485 chip, the second overvoltage protection circuit includes an eighth resistor R 73 、The ninth resistor R 72 , the tenth resistor R 70 11th resistor R 71 , the fourth voltage zener diode DZ 71 、Fifth voltage zener diode DZ 72 、The sixth voltage zener diode DZ 73 , the seventh voltage zener diode DZ 74 、First fuse FU 70 And the second fuse FU 71 ; The eighth resistor R 73 The first end of the second overvoltage protection circuit and the first output end of the tenth resistor R 70 The first end of the eighth resistor R 73 The second end of is grounded; The fourth voltage stabilizing diode DZ 71 The negative electrode is connected to the tenth resistor R 70 The second end and the fifth Zener diode DZ 72 The cathode of the fourth Zener diode DZ is connected 71 The positive electrode of the fifth voltage stabilizing diode DZ is grounded; 72 The positive pole is grounded; The first fuse FU 70 The first end of the fifth voltage zener diode DZ 72 The negative terminal of the first fuse FU 70 The second end of is connected to the first input end of the second overvoltage protection circuit; The ninth resistor R 72 The first end is respectively connected to the second output end of the second overvoltage protection circuit and the eleventh resistor R 71 The first end of the ninth resistor R 72 The second end is connected to a power source; The sixth voltage zener diode DZ 73 The negative electrode of each resistor R 71 The second end and the seventh voltage zener diode DZ 74 The negative electrode of the sixth Zener diode DZ is connected 73 The positive electrode is grounded; the seventh voltage stabilizing diode DZ 74 The positive pole is grounded; The second fuse FU 71 The first end of the seventh voltage zener diode DZ 74 The negative terminal of the second fuse FU 71 The second end of the overvoltage protection circuit is connected to the second input end of the second overvoltage protection circuit.

8. The controller circuit according to claim 6, characterized in that When the communication device is a CAN bus, the second overvoltage protection circuit includes a twelfth resistor R 80 、Thirteenth resistor R 81 、The eighth voltage zener diode DZ 81 、Ninth voltage zener diode DZ 82 、The tenth voltage zener diode DZ 83 11. Zener diode DZ 84 、Third fuse FU 80 And the fourth fuse FU 81 ; The twelfth resistor R 80 The first end is connected to the third output end of the second overvoltage protection circuit; The eighth voltage zener diode DZ 81 The negative electrode is connected to the twelfth resistor R 80 The second end and the ninth voltage zener diode DZ 82 The negative electrode of the eighth Zener diode DZ is connected 81 The positive pole of the ninth voltage zener diode DZ is grounded. 82 The positive pole is grounded; The third fuse FU 80 The first end of the ninth voltage zener diode DZ 82 The negative pole of the third fuse FU 80 The second end of the overvoltage protection circuit is connected to the third input end of the second overvoltage protection circuit; The thirteenth resistor R 81 A first end is connected to a fourth output end of the second overvoltage protection circuit; The tenth voltage zener diode DZ 83 The negative electrode is connected to the thirteenth resistor R 81 The second end and the eleventh voltage zener diode DZ 84 The negative electrode of the tenth Zener diode DZ is connected 83 The positive pole of the eleventh Zener diode DZ is grounded. 84 The positive pole is grounded; The fourth fuse FU 81 The first end of the eleventh voltage zener diode DZ 84 The negative pole of the fourth fuse FU 81 The second end of is connected to the fourth input end of the second overvoltage protection circuit.

9. The controller circuit according to claim 1, characterized in that: The communication device also includes an RF433 chip, and the communication isolation circuit includes a fifth capacitor C8, a sixth capacitor C9, and a seventh capacitor C 13 And the eighth capacitor C 14 ; The first input end of the communication isolation circuit is connected to the first end of the fifth capacitor C8, the second end of the fifth capacitor C8 is connected to the first end of the sixth capacitor C9, and the second end of the sixth capacitor C9 is grounded; The second input terminal of the communication isolation circuit is connected to the seventh capacitor C 13 The first end of the seventh capacitor C 13 The second end of the eighth capacitor C 14 The first end of the eighth capacitor C 14 The second end is connected to the input pin of the RF433 chip.

10. A mine device, characterized in that: The mine apparatus comprises a controller circuit as claimed in any one of claims 1 to 9.

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