CN201328963Y - Multifunctional anti-bedsore nursing bed intelligent controller - Google Patents
Multifunctional anti-bedsore nursing bed intelligent controller Download PDFInfo
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- CN201328963Y CN201328963Y CNU2009200173560U CN200920017356U CN201328963Y CN 201328963 Y CN201328963 Y CN 201328963Y CN U2009200173560 U CNU2009200173560 U CN U2009200173560U CN 200920017356 U CN200920017356 U CN 200920017356U CN 201328963 Y CN201328963 Y CN 201328963Y
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Abstract
The utility model discloses a multifunctional anti-bedsore nursing bed intelligent controller, which solves the problems of low safety, high cost and inconvenient operation in existing anti-bedsore nursing bed controlling means; has the advantages of simple structure, friendly man-machine interface, convenient operation, perfect failure protection measure and low cost. the structure is characterized in: a control panel circuit performs liquid crystal display and button operation processing; a main control panel receives the operation commands of the control panel by a master control core circuit, and the output drive circuit of the main control panel is connected with a relay output panel circuit; a signal input circuit performs bed body position detection; the relay output panel circuit receives the control signal from the output drive circuit, and controls the motor to act; at the same time, a multi-motor operation detection circuit and a multi-motor failure detection circuit send the detected operation and failure signals to a signal input circuit; the control panel circuit and the main control panel circuit exchanges information in RS485 serial communication mode, and composes a master-slaver type control structure.
Description
Technical Field
The utility model relates to a nursing bed controlling means especially relates to a multi-functional bedsore prevention nursing bed intelligent control ware.
Background
The multifunctional bedsore-proof nursing bed is a bed tool designed for paralyzed patients and patients who can not take care of themselves after lying in bed for a long time, has multiple functions of automatic turning over, bed surface alternation, automatic hip lifting, left-right translation and the like, can effectively reduce the compression time of muscles at the pressed part of the body of a patient, is beneficial to blood circulation and ventilation drying, avoids the occurrence of compressive ulcer, relieves the pain of the patient, and simultaneously can greatly relieve the labor intensity of accompanying and attending the patient. In the past, a Programmable Logic Controller (PLC) is mostly adopted as a control unit, time sequence control is mainly adopted, fault protection measures are lacked, an intuitive display interface is not provided, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the control device security that prevents bedsore nursing bed at present not good, the cost is higher, the inconvenient scheduling problem of operation, provides one kind and has simple structure, and the human-computer interface is friendly, convenient operation, and the fault protection measure is perfect, and the multi-functional bedsore nursing bed intelligent control ware that prevents of cost low grade advantage.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multifunctional bedsore-proof nursing bed intelligent controller comprises a control panel circuit, a main control panel circuit and a relay output panel circuit; wherein,
the control panel circuit performs liquid crystal display and key operation, sends an operation command to the main control panel circuit, and reads back the action state of the main control panel circuit for real-time display;
the main control panel circuit receives an operation command of the control panel circuit through the main control core circuit and is connected with the relay output panel circuit through the output driving circuit; the bed body position detection is carried out through the signal input circuit, so that the bed body is prevented from being damaged due to misoperation;
the relay output board circuit receives the control signal of the output driving circuit and controls a plurality of cloth winding shaft motors and a plurality of direct current push rod motors which are arranged on the bed body to work through the multi-motor control circuit; meanwhile, the multi-motor operation detection circuit and the multi-motor fault detection circuit send detected operation and fault signals to the signal input circuit;
the control panel circuit and the main control panel circuit exchange information in an RS485 serial communication mode to form a master-slave control structure.
The control panel circuit comprises a single chip microcomputer U01, a hardware watchdog U02, an RS485 serial port conversion module U03, a liquid crystal display module and a 4 x 4 keyboard array; a P1 port of the singlechip U01 is connected with a 4 x 4 keyboard array for carrying out key scanning detection; the bus of the P0 port is connected with the bus of the liquid crystal display module, and the liquid crystal control signal line is connected with the P2 port; serial interfaces RXD and TXD of the singlechip U01 are accessed to the U03 to carry out RS485 level conversion, and the P3.3 port of the U01 controls the switching of sending and receiving; the hardware watchdog U02 completes power-on reset and program operation monitoring, and sends out a reset signal 2.5 seconds after a dog feeding signal is not generated at a port P3.2, so that the U01 is ensured not to be halted; the control panel circuit is used as a host, sends an action command to the main control panel circuit according to the keyboard operation command, continuously reads back the action state data of the main control panel circuit, and displays the action state data in a Chinese character form through the liquid crystal display module.
The master control core circuit comprises a single chip microcomputer U1, a hardware watchdog U2, an RS485 serial port conversion U3, a data address latch U4, a power-down retention RAM U5, a write signal decoder U6 and a read signal decoder U7. The U1, U4 and U5 form a standard read-write circuit of a singlechip data memory, and the U5 is a 2K byte RAM with an internal battery without power failure and without write-in time limitation and is used for storing various real-time state data in the operation process; the hardware watchdog U2 completes power-on reset and program operation monitoring, and sends out a reset signal 2.5 seconds after a P3.5 port of U1 does not generate a dog feeding signal, so that U1 is ensured not to be halted; the serial interfaces RXD and TXD of the U1 are accessed to the U3 to carry out RS485 level conversion, the main control panel circuit is normally operated in a receiving state as a slave, the switching of sending and receiving is controlled by P3.4, and after the command of the control panel circuit is received, corresponding operation is executed and state information is returned; the read signal decoder U7 decodes through the address line and RD read signal combination of U1, outputs 8-path strobe signal, can read 8 × 8-path switching value signal input at most; the write signal decoder U6 decodes the WR signal of U1 by the address line combination, and outputs 4 gate signals, and at most 4 × 8 switching value signals.
The signal input circuit comprises 6 paths of signals of two angle sensors, each angle sensor is respectively arranged on a bed body cloth rolling shaft motor, each angle sensor outputs 3 paths of pulse signals representing the rotating position, steering signals and original point signals, the two angle sensors are both connected with a latch U10, 1024 pulses are output by the angle sensors in each rotation, the pulse width of the pulse signals is larger than 80ms, U1 reads the pulse signals at regular time every 5ms, the pulse numbers are added and subtracted according to the steering signals and the original point signals and stored in a power-down maintaining RAM U5, the position of the cloth rolling shaft is determined, and the U1 can still determine the position of the cloth rolling shaft after power-down and power-up are carried out again; the signal input circuit also comprises seven pairs of travel switches which are arranged on seven electric push rods of the bed body, and each pair of travel switches consists of a high-position travel switch and a low-position travel switch; each pair of travel switches is connected with a latch U8 and a latch U9, the latch U8 and the latch U9 are used as input buffers, and the signal state is read in a time-sharing mode under the control of the U1 for outputting gating signals to the read decoder U7;
meanwhile, switching value signals generated by the direct current push rod motor operation signal and fault signal acquisition device are sent to the latch U11 and the latch U12, and the U1 reads and judges the operation and fault signals of the seven-path push rod motor at regular time under the control of gating signals of the read decoder U7 through the U11 and the U12.
The output driving circuit comprises 9 pairs of relays K1 and K2, and a pair of relays are respectively arranged on 2 cloth rolling shaft motors and 7 direct current push rod motors; all relays are driven by 3 groups of driving circuits, each group of driving circuits has the same structure and respectively drives 7 relays, and output latch latching signals of each group of driving circuits are respectively from WY0, WY1 and WY2 of a write decoder U6;
the structure of one group of driving circuits comprises an output latch U13, a 7-path photoelectric coupler, a 7-path driver U14 and corresponding resistors, wherein a relay action signal is sent by U1, the relay action signal is latched to the output end of U13 under the control of a gating signal WY0 output by a write decoder U6, the signal is transmitted to the input end of a driver U14 working by a 24V power supply through the photoelectric coupler, 7 relays are controlled to act after being driven by U14, the resistor RP6 is an optical coupler input current limiting resistor, and the resistors RP5 and RP7 form a voltage dividing resistor so that the input high and low levels of U14 meet the specified level requirement.
The multi-motor control circuit comprises 9 paths, each path comprises a pair of relays K1 and K2, the relays switch and control the forward and reverse rotation of a direct-current push rod motor or a cloth winding shaft motor so as to control the extension and the shortening of a push rod and the left and right movement of a bed surface, and normally closed contacts of the relays K1 and K2 are connected in an interlocking manner to prevent a power supply from being short-circuited during misoperation;
the operation detection circuit only detects the push rod motor, and has 7 paths, each path comprises diodes D1 and D2, a current-limiting resistor R4 and an optical coupler U30 which are connected in series in a direct current push rod motor loop, the current of the motor in normal operation can generate voltage drop at two ends of D1 and D2, the current is limited by R4, the input end of the optical coupler U30 can emit light, and an operation signal is generated at the output end; if the running signal is not generated when the direct current push rod motor runs, the motor loop can be judged to be open-circuited;
the fault detection circuit only detects the push rod motor, and has 7 paths, each path comprises a self-recovery fuse R3, a current-limiting resistor R5 and an optical coupler U31 which are connected in series in a motor loop, the current is in a normal range when the motor runs, the resistance value of R3 is small, the generated voltage drop is small, the input end of the optical coupler U31 cannot emit light, and the output end of the optical coupler has no signal output; when the motor is overloaded or short-circuited, the current is greatly increased, the resistance value of R3 is rapidly increased, so that large voltage drop is generated at two ends, the voltage is limited by R5, the input end of the optocoupler U31 emits light, and a fault signal is generated at the output end; these signals of main control panel circuit signal input circuit collection monitoring, pause the bed body and carry out the action after judging that the trouble takes place, avoid causing the damage of the bed body to send fault information to control panel and carry out audible alarm and LCD fault information display. The utility model discloses an intelligent controller is specially developed and designed for the multifunctional bedsore-proof nursing bed, a singlechip is used as a control core and is combined with hardware circuits such as peripheral isolation drive, and the forward and reverse motions of 7 electric push rods and 2 cloth winding shaft motors of the bed body can be respectively controlled through a relay; meanwhile, the controller detects the bed body action position and the cloth rolling shaft rotation angle, and controls each mechanical device to coordinate according to different bed body action requirements, so as to complete each bed body action function. The utility model discloses an intelligent controller is specially developed and designed for the multifunctional bedsore-proof nursing bed, a singlechip is used as a control core and is combined with hardware circuits such as peripheral isolation drive, and the forward and reverse motions of 7 electric push rods and 2 cloth winding shaft motors of the bed body can be respectively controlled through a relay; meanwhile, the controller detects the bed body action position and the cloth rolling shaft rotation angle, and controls each mechanical device to coordinate according to different bed body action requirements, so as to complete each bed body action function.
The utility model is characterized in that:
1. the controller adopts a master-slave type composition structure, reasonably distributes control functions, simplifies the hardware structure of each part and lightens the processing work of the singlechip.
2. The Chinese character liquid crystal display is adopted to intuitively and clearly display the action process of the bed body, the bed body position and the fault information.
3. The angle sensor is adopted to control the position of the winding and distributing shaft, so that the accumulated error generated by time control is overcome, and the method is accurate and reliable.
4. Adopt detection circuitry such as PTC self recovery fuse and current detection, the overload fault and the open circuit trouble of each electric putter are judged by singlechip intelligence, can cut off output fast and stop the action, guarantee that the bed body can not cause the bed body structure to destroy because of mechanical failure.
5. The DC-DC isolation power supply, the photoelectric coupling, the transient protection diode (TVS) and other devices are adopted, so that the strong interference generated when the relay is connected with the direct current load and switched on and off is effectively solved, and the reliable operation of the controller is ensured.
6. The power-off memory function is provided, if the bed body is powered off in the working process, the controller can automatically record the breakpoint, and after power supply is recovered, the original action can be continuously executed from the breakpoint position by pressing a pause/continue key.
7. When the power is on, the single machine debugging state can be entered through the specified composite key operation, each mechanical device can be controlled to act independently, and the debugging and the maintenance are convenient.
The utility model has the advantages that: the intelligent controller has a simple and direct operation panel, various operation commands can be completed only by one key, and the intelligent controller also has a Chinese character liquid crystal display window, can dynamically display the working state and the position information of the bed body, and has the advantages of friendly human-computer interface, convenient operation, perfect fault protection measures and low manufacturing cost.
Drawings
Fig. 1 is an electrical block diagram of the present invention;
FIG. 2 is an electrical schematic diagram of a control panel circuit;
FIG. 3 is an electrical schematic diagram of a master control core circuit;
FIG. 4 is an electrical schematic diagram of a signal input circuit;
FIG. 5 is an electrical schematic diagram of an output driver circuit;
FIG. 6 is an electrical schematic diagram of a relay output board circuit;
FIG. 7 is a schematic top view of a conventional bed;
fig. 8 is a side view of fig. 7.
The automatic cloth winding machine comprises a control panel circuit 1, a main control panel circuit 2, a relay output panel circuit 3, a main control core circuit 4, a signal input circuit 5, a power isolation voltage stabilizing circuit 6, an output driving circuit 7, an operation detection circuit 8, a fault detection circuit 9, a cloth winding shaft motor 10, a direct current push rod motor 11 and a multi-motor control circuit 12.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
In fig. 1, it includes a control panel circuit 1, a main control board circuit 2 and a relay output board circuit 3; wherein,
the control panel circuit 1 performs liquid crystal display and key operation processing, sends an operation command to the main control panel circuit according to the operation command, and reads back the action state of the main control panel circuit to display in real time;
the main control board circuit 2 receives the operation command of the control panel circuit 1 through the main control core circuit 4, and is connected with the relay output board circuit 3 through the output driving circuit 7 according to the action requirement to coordinate and control the forward and reverse movement of each mechanical device of the bed body; the bed body position is detected through the signal input circuit 5, so that the bed body is prevented from being damaged due to misoperation;
the relay output board circuit 3 receives the control signal of the output driving circuit 7, and controls a plurality of cloth winding shaft motors 10 and a plurality of direct current push rod motors 11 which are arranged on the bed body to work through a multi-motor control circuit; meanwhile, the multi-motor operation detection circuit 8 and the multi-motor fault detection circuit 9 send detected operation and fault signals to the signal input circuit 5;
the control panel circuit 1 and the main control panel circuit 2 exchange information in an RS485 serial communication mode to form a master-slave control structure.
In fig. 2, the control panel circuit 1 is mainly composed of a single chip microcomputer U01, a hardware watchdog U02, an RS485 serial port conversion U03, a liquid crystal display module, and a 4 × 4 keyboard array. A P1 port of the singlechip U01 is connected with a 4 x 4 key array for key scanning detection; the bus of the P0 port is connected with the bus of the liquid crystal display, and the liquid crystal control signal line is connected with the P2 port; serial interfaces RXD and TXD of the singlechip U01 are accessed to the U03 to carry out RS485 level conversion, and the P3.3 port of the U01 controls the switching of sending and receiving. The hardware watchdog U02 completes power-on reset and program operation monitoring, and sends out a reset signal 2.5 seconds after the P3.2 port does not generate a dog feeding signal, so as to ensure that the U01 does not crash. The LCD can display 2 x 10 Chinese characters, and has a Chinese character library to support parallel bus interface. The working mode is that the control panel is used as a host, an action command is sent to the main control panel according to the keyboard operation command, data such as the action state of the main control panel are read back continuously, and the data are displayed in a Chinese character form through the Liquid Crystal Display (LCD).
In fig. 3, the main control board core circuit 4 is the core of the main control board, and mainly comprises a single chip microcomputer U1, a hardware watchdog U2, an RS485 serial port conversion U3, a data address latch U4, a power-down retention RAM U5, a write signal decoder U6, and a read signal decoder U7. The U1, U4 and U5 form a standard read-write circuit of a singlechip data memory, the U5 selects a 2K byte RAM with an internal battery without power failure, and the RAM is not limited by write-in times and is used for storing various real-time state data in the operation process. The hardware watchdog U2 completes power-on reset and program operation monitoring, and sends out a reset signal 2.5 seconds after a P3.5 port of the U1 does not generate a dog feeding signal, so that the U1 is ensured not to be halted. The serial interfaces RXD and TXD of the U1 are accessed to the U3 to carry out RS485 level conversion, the master control board as a slave computer works in a receiving state at ordinary times, the switching of sending and receiving is controlled by P3.4, and after receiving the command of the control panel, corresponding operation is executed and state information is returned. Because the position of the bed body inputs signals and drives to output a lot, the interface resources on the single chip can not meet the requirements, so the input and output ports are expanded. U7 is a read input signal decoder, which can output 8-path strobe signal by combined decoding of address line and RD read signal, and can read 8 × 8-path switching value signal input at most. U6 is a write output signal decoder, which can output 4-path strobe signal and maximum 4-by-8-path switching value signal by combined decoding of address line and WR signal. The quantity requirement of bed body input and output is satisfied through the extension to address range through address line unified division RAM, read input and write output does not have the address cross conflict, and different data read-write and input-output functions can be accomplished to different addresses only with MOVX instruction operation during programming.
The purpose of selecting the RAM without power failure is to consider that when power failure occurs suddenly in the action of the bed body, the action state at the power failure moment, such as action type, operation time, angle position and the like, can be stored, the bed body automatically enters a pause state when being electrified again, and the unfinished action before the power failure can be continuously executed after a pause/continue key is pressed, so that the position is prevented from being out of control.
In fig. 4, the signal input circuit 5 is a signal input portion of the main control board, and mainly includes an external input signal and an input latch. The bed body uses 7 electric push rods in all, each push rod has 2 high-order and low-order travel switch signals, so that 14 paths of switching value signals are shared, 2 paths of 8-path latches U8 and U9 are used as input buffers, and the signal state is read in a time-sharing mode under the control of the U1 on the output gating signals of the read decoder. The horizontal translation action about the bed body is accomplished by 2 cloth beam motors, for accurate control shift position, has been equipped with angle sensor respectively, and every angle sensor output signal is: the pulse signal indicating the rotational position, the steering signal, and the origin signal are 3-way signals, and are connected to 2 angle sensor signals through a U10 latch. 1024 pulses can be output by the angle sensor every revolution, because the cloth winding shaft runs slowly, the pulse width of a pulse signal is more than 80ms, a method of reading every 5ms at regular time is adopted, the pulse signal is acquired by combining software digital filtering, the pulse number is counted by adding and subtracting according to a steering signal and an original point signal, and the pulse number is stored in the non-power-off RAM U5, so that the position of the cloth winding shaft is determined, and the U1 can still determine the position of the cloth winding shaft after power failure and power re-electrification. In order to monitor the running condition of the motor, the running signals and fault signals of the 7-path push rod motor are collected and detected, the signals are switching value signals, and the U1 carries out reading judgment at regular time under the control of the gating signals of the reading decoder through the latches U11 and U12.
In fig. 5, the output driving circuit 7 is an output control portion of the main control board, wherein the 7-way driving output circuit is composed of an output latch U13, a photocoupler, a 7-way driver U14 and corresponding resistors, as shown in fig. 5. Because the control mainboard is 5V power work, and the relay is 24V power work, and the control signal of U1 output need pass through drive circuit just can make the relay normally move, and in order to reduce the relay and produce the interference to main control circuit when moving, 5V and 24V working power adopt mutual isolation form, consequently use photoelectric coupling circuit to convey control signal to drive circuit. The action signal sent by U1 is latched to the output end of U13 under the control of the gating signal WY0 output by the write decoder, and the signal is transmitted to the input end of a driver U14 operated by a 24V power supply through a photoelectric coupler, and the relay action is controlled after the drive of U14. The resistor RP6 is an optical coupler input current limiting resistor, and the resistors RP5 and RP7 form a voltage dividing resistor, so that the input high-low level of the U14 meets the specified level requirement.
In fig. 6, the multi-motor control circuit 12 has 9 paths, each path includes a pair of relays K1 and K2, which are switched to control the forward and reverse rotation of the dc push rod motor or the cloth winding shaft motor so as to control the extension and shortening of the push rod and the left and right movement of the bed surface, and the normally closed contacts of the relays K1 and K2 are interlocked to prevent the power supply short circuit caused by malfunction;
the operation detection circuit 8 only detects the push rod motor, and has 7 paths, each path comprises diodes D1 and D2, a current-limiting resistor R4 and an optical coupler U30 which are connected in series in a direct current push rod motor loop, the current of the motor in normal operation can generate voltage drop at two ends of D1 and D2, the current is limited by R4, the input end of the optical coupler U30 can emit light, and an operation signal is generated at the output end; if the running signal is not generated when the direct current push rod motor runs, the motor loop can be judged to be open-circuited;
the fault detection circuit 9 only detects the push rod motor, and has 7 paths, each path comprises a self-recovery fuse R3, a current-limiting resistor R5 and an optical coupler U31 which are connected in series in a motor loop, the current is in a normal range when the motor runs, the resistance value of the R3 is small, the generated voltage drop is small, the input end of the optical coupler U31 cannot emit light, and the output end of the optical coupler has no signal output; when the motor is overloaded or short-circuited, the current is greatly increased, the resistance value of R3 is rapidly increased, so that large voltage drop is generated at two ends, the voltage is limited by R5, the input end of the optocoupler U31 emits light, and a fault signal is generated at the output end; these signals of main control panel circuit signal input circuit collection monitoring, pause the bed body and carry out the action after judging that the trouble takes place, avoid causing the damage of the bed body to send fault information to control panel and carry out audible alarm and LCD fault information display.
The two cloth roller motors do not have special operation and fault detection circuits, and detection of the two cloth roller motors is completed by combining signals of the angle sensors. When the cloth winding shaft motor normally operates, the angle sensor can send out pulse and steering signals, the fault state of the cloth winding shaft motor can be judged through a software method, if no corresponding pulse signal is generated when the cloth winding shaft motor operates, the fault of the cloth winding shaft motor can be judged, the bed body action is suspended, and corresponding alarm prompt is carried out. Therefore, the fault protection comprises all motors of the bed body, and the protection measures are perfect.
The power isolation voltage stabilizing circuit 6 outputs 12V and 5V direct current voltages isolated from a 24V power supply.
Fig. 7 and 8 show the structural schematic diagrams of the existing bed, wherein the cloth winding shaft motors 10 are distributed on two sides of the bed, the number of the direct current push rod motors 11 is 7, one is respectively arranged on two sides of the front end and the rear end of the bed, and three are respectively arranged in the middle of the bed.
Claims (6)
1. A multifunctional bedsore-proof nursing bed intelligent controller is characterized by comprising a control panel circuit, a main control panel circuit and a relay output panel circuit; wherein,
the control panel circuit performs liquid crystal display and key operation, sends an operation command to the main control panel circuit, and reads back the action state of the main control panel circuit for real-time display;
the main control panel circuit receives an operation command of the control panel circuit through the main control core circuit, and is connected with the relay output panel circuit through the output driving circuit to coordinate and control the movement of each mechanical device of the bed body; detecting the position of the bed body through a signal input circuit;
the relay output board circuit receives the control signal of the output driving circuit and controls a plurality of cloth winding shaft motors and a plurality of direct current push rod motors which are arranged on the bed body to work through the multi-motor control circuit; meanwhile, the multi-motor operation detection circuit and the multi-motor fault detection circuit send detected operation and fault signals to the signal input circuit;
the control panel circuit and the main control panel circuit exchange information in an RS485 serial communication mode to form a master-slave control structure.
2. The intelligent controller of the multifunctional bedsore-proof nursing bed as claimed in claim 1, wherein the control panel circuit comprises a single chip microcomputer U01, a hardware watchdog U02, an RS485 serial port conversion module U03, a liquid crystal display module and a 4 x 4 keyboard array; a P1 port of the singlechip U01 is connected with a 4 x 4 keyboard array for carrying out key scanning detection; the bus of the P0 port is connected with the bus of the liquid crystal display module, and the liquid crystal control signal line is connected with the P2 port; serial interfaces RXD and TXD of the singlechip U01 are accessed to the U03 to carry out RS485 level conversion, and the P3.3 port of the U01 controls the switching of sending and receiving; the hardware watchdog U02 completes power-on reset and program operation monitoring; the control panel circuit is used as a host, sends an action command to the main control panel circuit according to the keyboard operation command, continuously reads back the action state data of the main control panel circuit, and displays the action state data in a Chinese character form through the liquid crystal display module.
3. The multifunctional bedsore-proof nursing bed intelligent controller as claimed in claim 1, wherein said master control core circuit comprises a single chip microcomputer U1, a hardware watchdog U2, an RS485 serial port conversion U3, a data address latch U4, a power-down retention RAM U5, a write signal decoder U6 and a read signal decoder U7; the U1, U4 and U5 form a standard singlechip data memory read-write circuit; the hardware watchdog U2 completes power-on reset and program operation monitoring; the serial interfaces RXD and TXD of the U1 are accessed into the U3 to carry out RS485 level conversion; the main control panel circuit as a slave computer normally works in a receiving state, the switching between sending and receiving is controlled by P3.4, and after receiving the command of the control panel circuit, corresponding operation is executed and state information is returned; the read signal decoder U7 decodes through the combination of the RD read signal of U1 and the address line; write signal decoder U6 decodes through a combination of address lines and the WR signal of U1.
4. The multifunctional bedsore-proof nursing bed intelligent controller as claimed in claim 1, wherein said signal input circuit comprises 6 signals of two angle sensors, each angle sensor is installed on the bed body cloth-rolling shaft motor, each angle sensor outputs 3 paths of pulse signal, turning signal and origin signal representing the turning position, both angle sensors are connected with the latch U10, U1 reads the pulse signal at regular time, counts the number of pulses according to the turning signal and the origin signal, and stores the count into the power-down holding RAM U5; the signal input circuit also comprises seven pairs of travel switches which are arranged on seven electric push rods of the bed body, and each pair of travel switches consists of a high-position travel switch and a low-position travel switch; each pair of travel switches is connected with a latch U8 and a latch U9, the latch U8 and the latch U9 are used as input buffers, and the signal state is read in a time-sharing mode under the control of the U1 for outputting gating signals to the read decoder U7;
meanwhile, switching value signals generated by the direct current push rod motor operation signal and fault signal acquisition device are sent to the latch U11 and the latch U12, and the U1 reads and judges the operation and fault signals of the seven-path push rod motor at regular time under the control of gating signals of the read decoder U7 through the U11 and the U12.
5. The multifunctional bedsore-proof nursing bed intelligent controller as claimed in claim 1, wherein said output driving circuit comprises 9 pairs of relays K1, K2, a pair of relays are respectively mounted on 2 cloth-rolling shaft motors and 7 dc push rod motors; all relays are driven by 3 groups of driving circuits, each group of driving circuits has the same structure and respectively drives 7 relays, and output latch latching signals of each group of driving circuits are respectively from WY0, WY1 and WY2 of a write decoder U6;
the structure of one group of driving circuits comprises an output latch U13, a 7-path photoelectric coupler, a 7-path driver U14 and corresponding resistors, wherein a relay action signal is sent by U1, the relay action signal is latched to the output end of U13 under the control of a gating signal WY0 output by a write decoder U6, the signal is transmitted to the input end of a driver U14 working by a 24V power supply through the photoelectric coupler, 7 relays are controlled to act after being driven by U14, the resistor RP6 is an optical coupler input current limiting resistor, and the resistors RP5 and RP7 form a voltage dividing resistor so that the input high and low levels of U14 meet the specified level requirement.
6. The multifunctional bedsore-proof nursing bed intelligent controller as claimed in claim 1, wherein said multiple electric machine control circuit has 9 circuits, each circuit includes a pair of relays K1, K2, the normally closed contacts of relays K1, K2 are interlocked to prevent short circuit of power supply when malfunction occurs;
the operation detection circuit only detects the push rod motor, and the operation detection circuit comprises 7 paths, wherein each path comprises diodes D1 and D2, a current-limiting resistor R4 and an optocoupler U30 which are connected in series in a direct current push rod motor loop;
the fault detection circuit only detects the push rod motor, and the total number of the fault detection circuit is 7, and each circuit comprises a self-recovery fuse R3, a current-limiting resistor R5 and an optocoupler U31 which are connected in series in a motor loop; the main control panel circuit signal input circuit collects and monitors the signals, stops the bed body to execute actions after judging that a fault occurs, and sends fault information to the control panel to perform sound alarm and LCD fault information display.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2009200173560U CN201328963Y (en) | 2009-01-05 | 2009-01-05 | Multifunctional anti-bedsore nursing bed intelligent controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200173560U CN201328963Y (en) | 2009-01-05 | 2009-01-05 | Multifunctional anti-bedsore nursing bed intelligent controller |
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| CN201328963Y true CN201328963Y (en) | 2009-10-21 |
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| CNU2009200173560U Expired - Lifetime CN201328963Y (en) | 2009-01-05 | 2009-01-05 | Multifunctional anti-bedsore nursing bed intelligent controller |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102357050A (en) * | 2011-10-21 | 2012-02-22 | 深圳市泰乐康科技有限公司 | Position display device for medical bed |
| CN102824255A (en) * | 2012-09-17 | 2012-12-19 | 苏州工业园区职业技术学院 | Dual-core medical electric bed controller |
| CN105362026A (en) * | 2014-08-28 | 2016-03-02 | 天津康丽医疗器械有限公司 | Gynecological examination bed |
| CN105362003A (en) * | 2014-08-28 | 2016-03-02 | 天津康丽医疗器械有限公司 | Electric pushing bed |
| CN106074045A (en) * | 2016-07-28 | 2016-11-09 | 江苏若博机器人科技有限公司 | A kind of double-core Two-wheeled is freely lifted robot electric sick bed controller |
| CN106354040A (en) * | 2016-10-18 | 2017-01-25 | 湖北航天技术研究院总体设计所 | Isolation type electric push rod control method and device with in-place feedback function |
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2009
- 2009-01-05 CN CNU2009200173560U patent/CN201328963Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357050A (en) * | 2011-10-21 | 2012-02-22 | 深圳市泰乐康科技有限公司 | Position display device for medical bed |
| CN102824255A (en) * | 2012-09-17 | 2012-12-19 | 苏州工业园区职业技术学院 | Dual-core medical electric bed controller |
| CN105362026A (en) * | 2014-08-28 | 2016-03-02 | 天津康丽医疗器械有限公司 | Gynecological examination bed |
| CN105362003A (en) * | 2014-08-28 | 2016-03-02 | 天津康丽医疗器械有限公司 | Electric pushing bed |
| CN106074045A (en) * | 2016-07-28 | 2016-11-09 | 江苏若博机器人科技有限公司 | A kind of double-core Two-wheeled is freely lifted robot electric sick bed controller |
| CN106354040A (en) * | 2016-10-18 | 2017-01-25 | 湖北航天技术研究院总体设计所 | Isolation type electric push rod control method and device with in-place feedback function |
| CN106354040B (en) * | 2016-10-18 | 2019-10-08 | 湖北航天技术研究院总体设计所 | A kind of isolated form electric pushrod control method and device with feedback function in place |
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