CN103176939B - Redundant serial communication device with automatic replacing function - Google Patents
Redundant serial communication device with automatic replacing function Download PDFInfo
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- CN103176939B CN103176939B CN201310035172.8A CN201310035172A CN103176939B CN 103176939 B CN103176939 B CN 103176939B CN 201310035172 A CN201310035172 A CN 201310035172A CN 103176939 B CN103176939 B CN 103176939B
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Abstract
The invention discloses a redundant serial communication device with an automatic replacing function. The redundant serial communication device with the automatic replacing function comprises a power module, a high-voltage anti-latch type four-channel single-pole single-throw (SPST) switch, a control unit, a sensor unit, a first serial port unit and a second serial port unit, wherein the first serial port unit and the second serial port unit are redundant for each other. The first serial port unit comprises a first serial port chip module and a first low input voltage load current-limit switch module. The second serial port unit comprises a second serial port chip module and a second low input voltage load current-limit switch module. The control unit controls the first serial port chip module or the second serial port chip module to be connected with external serial port modules through the high-voltage anti-latch type four-channel SPST switch. The redundant serial communication device with the automatic replacing function has the advantages of being safe and reliable, capable of monitoring and replacing damaged chips automatically, simple in circuit structure, and long in service life.
Description
Technical field
The invention belongs to serial port communication technology field, be specifically related to a kind of redundant serial communication device with automatic replacement function.
Background technology
In recent years along with the development of science and technology, serial ports is widely used as the agreement of a kind of very common apparatus communication on computer, and especially serial ports has also become the general communication protocol of a lot of instrumentation devices.In addition the equipment of a lot of GPIB compatibility is also with RS-232 mouth, and the exploitation of multiple serial port communication set and current Internet of Things all be unable to do without the use of serial ports, it achieves transmission and the reception of data.
But because the interface signal level value of serial ports is higher, the chip of fragile interface circuit, again because incompatible with Transistor-Transistor Logic level therefore level shifting circuit need be used can be connected with TTL circuit.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of safe and reliable, can replace that defective chip, circuit structure are simple, the redundant serial communication device with automatic replacement function of long service life by automatic monitoring.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of redundant serial communication device with automatic replacement function, comprise power module, high pressure anti-latch-type four-way single-pole single-throw switch (SPST), control module, the first serial unit of sensor unit and each other redundancy and second serial unit, described first serial unit comprises first serial chip module and for the over-current signal that gathers first serial chip module and the first low input load current limiting switch module of duty controlling first serial chip module, described second serial unit comprises second serial chip module and for the over-current signal that gathers second serial chip module and the second low input load current limiting switch module of duty controlling second serial chip module, described power module provides+15V to supply with the power supply of-15V for high pressure anti-latch-type four-way single-pole single-throw switch (SPST), first serial chip module is connected with the serial port module of outside by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) by described control module acquiescence, first serial chip module is closed by the first low input load current limiting switch module when the first low input load current limiting switch module output overcurrent signal, second serial chip module is opened by the second low input load current limiting switch module, and by high pressure anti-latch-type four-way single-pole single-throw switch (SPST), second serial chip module is connected with outside serial port module, described high pressure anti-latch-type four-way single-pole single-throw switch (SPST) is ADG5434 chip, 3 of described ADG5434 chip, 8, 13, No. 18 pins are connected with outside serial port module, when 13 of ADG5434 chip, 18 pins are when there is the launching and receiving not having data in the 10mS time, No. 3 pin OC1 output overcurrent signal of the first low input load current limiting switch module sends to control module.
The present invention has following advantage:
1, the present invention is by arranging first serial unit and the second serial unit of redundancy each other, first serial chip module is connected with the serial port module of outside by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) by control module acquiescence, first serial chip module is closed by the first low input load current limiting switch module when the working current of the first serial chip module of the first low input load current limiting switch module acquires occurs abnormal, second serial chip module is opened by the second low input load current limiting switch module, and by high pressure anti-latch-type four-way single-pole single-throw switch (SPST), second serial chip module is connected with outside serial port module, therefore the present invention can switch to second serial unit immediately when the electric current of first serial unit is excessive, not only solve the problem that RS232 serial port chip is burnt, but also can monitor and automatically replace, a kind of detection of simple and convenient serial ports and the method for backup are provided, have safe and reliable, defective chip can be replaced by automatic monitoring, the simple advantage of circuit structure.
2, the present invention is by arranging first serial unit and the second serial unit of redundancy each other, first serial chip module is closed by the first low input load current limiting switch module when occurring abnormal by the working current of the first serial chip module at the first low input load current limiting switch module acquires, second serial chip module is opened by the second low input load current limiting switch module, and by high pressure anti-latch-type four-way single-pole single-throw switch (SPST), second serial chip module is connected with outside serial port module, achieve the redundancy backup to first serial unit and second serial unit, substantially increase the serviceable life of serial ports, and eliminate the trouble of inspection chip and reduce the difficulty changed chip and bring, there is the advantage of long service life.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the framed structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the circuit interface principle schematic of power module in the embodiment of the present invention.
Fig. 3 is the circuit interface principle schematic of embodiment of the present invention mesohigh anti-latch-type four-way single-pole single-throw switch (SPST).
Fig. 4 is the circuit interface principle schematic of first serial chip module in the embodiment of the present invention.
Fig. 5 is the circuit interface principle schematic of second serial chip module in the embodiment of the present invention.
Fig. 6 is the circuit interface principle schematic of the first low input load current limiting switch module in the embodiment of the present invention.
Fig. 7 is the circuit interface principle schematic of the second low input load current limiting switch module in the embodiment of the present invention.
Marginal data: 1, power module; 2, high pressure anti-latch-type four-way single-pole single-throw switch (SPST); 3, control module; 4, first serial unit; 41, first serial chip module; 42, the first low input load current limiting switch module; 5, second serial unit; 51, second serial chip module; 52, the second low input load current limiting switch module.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
As shown in Figure 1, the redundant serial communication device that the present embodiment has automatic replacement function comprises power module 1, high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2, control module 3, the first serial unit 4 of sensor unit and each other redundancy and second serial unit 5, first serial unit 4 comprises first serial chip module 41 and for the over-current signal that gathers first serial chip module 41 and the first low input load current limiting switch module 42 of duty controlling first serial chip module 41, second serial unit 5 comprises second serial chip module 51 and for the over-current signal that gathers second serial chip module 51 and the second low input load current limiting switch module 52 of duty controlling second serial chip module 51, described power module 1 provides+15V to supply with the power supply of-15V for high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2, control module 3 is given tacit consent to and is connected with the serial port module of outside by first serial chip module 41 by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2, first serial chip module 41 is closed by the first low input load current limiting switch module 42 when the first low input load current limiting switch module 42 output overcurrent signal, second serial chip module 51 is opened by the second low input load current limiting switch module 52, and by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2, second serial chip module 51 is connected with outside serial port module.
As shown in Figure 2, the power module 1 of the present embodiment adopts the biased boosting of CCD and negative output CD/CD converter LTC3463 chip (U1) to realize.Power supply VCC and inductance L 1, inductance L 2 one end connects, the other end of inductance L 1 is connected with the SW1 pin of U1 (LT3463), the other end of inductance L 2 is connected with the SW2 pin of U1 (LT3463), the other end of inductance L 2 also with one end of electric capacity C1, the other end of electric capacity C1 is connected with the D2 pin of U1 (LT3463), the other end of electric capacity C1 is also connected with the positive terminal of schottky diode D1, the negative pole end of schottky diode D1 also with resistance R3, electric capacity C2, the positive terminal of electrochemical capacitor E2 connects, resistance R3 and electric capacity C2 are in parallel and be connected with the FB2 pin of U1 (LT3463), the other end of electric capacity C2 and one end of resistance R4, the other end of resistance R4 is connected with the VREF pin of U1 (LT3463).VIN, SHDN1, SHDN2 pin of U1 is connected with power supply VCC.The FB1 pin of U1 (LT3463) is connected with one end of resistance R1, resistance R2, the other end of resistance R2 is connected with the negative pole end of electrochemical capacitor E1, the positive terminal of resistance R1, electric capacity E1 is connected with the VOUT pin of U1 (LT3463), and end exports positive 15V voltage thus, negative 15V voltage is exported, the negative pole end ground connection of electrochemical capacitor E2 by the negative pole end of schottky diode D1.The boosting that the present embodiment is biased by CCD is connected with high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2 with the output terminal of negative output CD/CD converter LT3463 chip, for high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2 provides the stabilized power source of regular+15V and-15V.
As shown in Figure 3, the high pressure of the present embodiment anti-latch-type four-way single-pole single-throw switch (SPST) 2 adopts high pressure anti-breech lock four-way SPST (single-pole single-throw (SPST)) switch ADG5434 chip (U2) to realize.The 5th of U2 is connected with-15V output terminal with the+15V of power module 1 respectively with No. 6 pins, 2nd, 9,12, No. 19 pin of U2 is connected with second serial chip module 51,4th, 7,14, No. 17 pin of U2 is connected with first serial chip module 41, and 3,8,13, No. 18 pins of U2 are connected with outside serial port module.
As shown in Figure 4, the first serial chip module 41 (U3) of the present embodiment realizes based on MAX232CPD chip.C1+ pin, the C1-pin of U3 are connected with negative pole end with the positive terminal of electrochemical capacitor E3 respectively, and C2+, C2-pin of U3 is connected with negative pole end with the positive terminal of electrochemical capacitor E8.The VCC pin of U3 respectively with the negative pole end of VCCB, electrochemical capacitor E4, the positive terminal of electrochemical capacitor E5, the positive terminal of electrochemical capacitor E4 is connected with the V+ pin of U3, the negative pole end of electrochemical capacitor E5 is connected with the positive terminal of electrochemical capacitor E9, the GND pin of U3 respectively, and ground connection.The negative pole end of electrochemical capacitor E9 is connected with the V-pin of U3.O.11 pin (T1IN), No. 12 pin (RIOUT) pins of RS232 module U3 are connected with No. 14 pin (S3B) of U2, No. 17 pin (S4B) pins respectively, and No. 13 pin (R1IN), No. 14 pin (T10UT) pins of U3 are connected with No. 7 pin (S2B) of U2, No. 4 pin (S1B) pins respectively.
As shown in Figure 5, the second serial chip module 51 (U4) of the present embodiment realizes based on MAX232CPD chip.The C1+ pin of U4 is connected with the positive terminal of electrochemical capacitor E10, and the negative pole end of electrochemical capacitor E10 is connected with the C1-pin of U4.The C2+ pin of U4 is connected with the positive terminal of electrochemical capacitor E11, and the negative pole end of electrochemical capacitor E11 is connected with the C2-pin of U4.The VCC pin of U4 respectively with the negative pole end of VCCA, electrochemical capacitor E6, the positive terminal of electrochemical capacitor E7, the positive terminal of electrochemical capacitor E6 is connected with the V+ pin of U4, the negative pole end of electrochemical capacitor E7 is connected with the positive terminal of electrochemical capacitor E12, the GND pin of U3 respectively, and ground connection.The negative pole end of electrochemical capacitor E12 is connected with the V-pin of U3.O.11 pin (T1IN), No. 12 pin (R10UT) pins of RS232 module U4 are connected with No. 12 pin (S3A) of U2, No. 19 pin (S4A) pins respectively, and No. 13 pin (R1IN), No. 14 pin (T10UT) pins of RS232 module U3 are connected with No. 9 pin (S2A) of U2, No. 2 pin (S1A) pins respectively.
As shown in Figure 6, the first low input load current limiting switch module 42 of the present embodiment realizes based on TPS22941 chip (U5); No. 4 pin (ON) of U5 is connected with (IN1, IN2, IN3, IN4) pin of U2, No. 1 pin (VCCB) of U5 is connected with (VCC) pin of U3, No. 3 pin (OC1) of U5 is connected with control module 3, for exporting the current information of U3 to control module 3;
As shown in Figure 7, the second low input load current limiting switch module 52 of the present embodiment realizes based on TPS22943 chip (U6).No. 4 pin (ON) of U6 is connected with (IN1, IN2, IN3, IN4) pin of U2, (VCC) pin of first pin VCCA and the U4 of U6 connects, No. 3 pin (OC2) of U6 is connected with control module 3, for exporting the current information of U4 to control module 3;
In the present embodiment, control module 3 adopts chip microcontroller.After switching on power, control module 3 is given tacit consent to and is connected with the serial port module of outside by first serial chip module 41 by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) 2, and U3 normally works, and the signal that the CONA that single-chip microcomputer pin is connected with U2 holds is 1.As the D3 of U2, the launching and receiving not having data is there is in D4 pin in the 10mS time, then illustrate that U3 has damaged can not continue to transmit data, now U3 there will be a continuous current state maximum current is 40mA, now No. 3 pin (OC1) the output overcurrent signal of U5 sends to single-chip microcomputer, single-chip microcomputer transmission signal 0 makes U5 close to the CONA pin (ON) of U5, single-chip microcomputer sends the (IN1 of signal 0 to U2 simultaneously, IN2, IN3, IN4) pin, now U2 break-before-make prevents, during switching channels, instantaneous short-circuit occurs and is switched to U4 for subsequent use, by U2, U4 is connected with outside serial port module, U6 (TPS22941) opens automatically, thus reach to the monitoring of RS232 module with automatically replace.
In the present embodiment, electrochemical capacitor E3, E4, E5, E6, E7, E8, E9, E10, E11, E12 are 1uF; Electrochemical capacitor E1 and E2 is 10uF; Inductance L 1 and L2 are 10uF; Electric capacity C1 is 1uf; Electric capacity C2 is 10PF.
The foregoing is only the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned embodiment, and every technical scheme belonging to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, some improvements and modifications of carrying out under the prerequisite not departing from principle of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. one kind has the redundant serial communication device of automatic replacement function, it is characterized in that: comprise power module (1), high pressure anti-latch-type four-way single-pole single-throw switch (SPST) (2), control module (3), the first serial unit (4) of sensor unit and each other redundancy and second serial unit (5), described first serial unit (4) comprises first serial chip module (41) and for the over-current signal that gathers first serial chip module (41) and the first low input load current limiting switch module (42) of duty controlling first serial chip module (41), described second serial unit (5) comprises second serial chip module (51) and for the over-current signal that gathers second serial chip module (51) and the second low input load current limiting switch module (52) of duty controlling second serial chip module (51), described power module (1) provides+15V to supply with the power supply of-15V for high pressure anti-latch-type four-way single-pole single-throw switch (SPST) (2), first serial chip module (41) is connected with the serial port module of outside by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) (2) by described control module (3) acquiescence, first serial chip module (41) is closed by the first low input load current limiting switch module (42) when the first low input load current limiting switch module (42) output overcurrent signal, second serial chip module (51) is opened by the second low input load current limiting switch module (52), and by high pressure anti-latch-type four-way single-pole single-throw switch (SPST) (2), second serial chip module (51) is connected with outside serial port module, described high pressure anti-latch-type four-way single-pole single-throw switch (SPST) (2) is ADG5434 chip, 3 of described ADG5434 chip, 8,13, No. 18 pins are connected with outside serial port module, when 13 of ADG5434 chip, 18 pins are when there is the launching and receiving not having data in the 10mS time, No. 3 pin OC1 output overcurrent signal of the first low input load current limiting switch module (42) sends to control module (3).
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| CN106896750A (en) * | 2017-03-16 | 2017-06-27 | 上海鼎桩新能源科技有限公司 | The serial ports redundancy switching method and device of a kind of controller system |
| CN107748727B (en) * | 2017-09-25 | 2020-05-29 | 上海卫星工程研究所 | High-reliability cross redundancy serial communication interface for spacecraft and use method thereof |
| CN110661305B (en) * | 2018-06-28 | 2021-01-05 | 宁德时代新能源科技股份有限公司 | Battery pack management system and control method thereof |
| CN109408436B (en) * | 2018-10-22 | 2022-03-18 | 航宇救生装备有限公司 | Switching method of switching circuit of dual-redundancy 422 serial port of overload starting device |
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