CN213846473U - Control circuit of heparin pump - Google Patents
Control circuit of heparin pump Download PDFInfo
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- CN213846473U CN213846473U CN202022844952.5U CN202022844952U CN213846473U CN 213846473 U CN213846473 U CN 213846473U CN 202022844952 U CN202022844952 U CN 202022844952U CN 213846473 U CN213846473 U CN 213846473U
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Abstract
The utility model relates to a control circuit of heparin pump. The method comprises the following steps: the motor detection circuit is connected with the motor and used for detecting the rotating speed and the rotating direction of the motor and generating a motor rotating speed signal and a motor rotating direction signal; the push rod detection circuit is connected with the gear and is used for detecting the rotating speed and the steering direction of the gear and generating a gear state signal representing the rotating speed and the steering direction of the gear; the control device is respectively connected with the motor detection circuit and the motor and used for generating a motor control instruction according to a motor rotating speed signal and a motor steering signal, and the motor control instruction is used for controlling the rotation and the stop of the motor; and the protection device is respectively connected with the push rod detection circuit and the motor and used for obtaining the push rod speed and the push rod direction of the push rod according to the gear state signal and generating a power supply control command, and the power supply control command is used for controlling the power-on and power-off of the motor. The motor is controlled to rotate and stop by the control device, and the power-on and power-off of the motor are controlled by the protection device, so that the purpose of reducing the control failure rate is achieved.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a control circuit of heparin pump.
Background
The heparin pump belongs to a necessary part in the blood purifier, when the blood purifier runs, heparin needs to be injected into a pipeline through the heparin pump so as to ensure the safety of blood in the circulation process, a typical heparin pump adopts a single-system control mode so as to realize the injection control of the heparin pump, if the single system has control faults, the heparin pump is also in a fault control state, the control of the heparin pump has higher fault rate, and the strict medical safety standard cannot be met.
SUMMERY OF THE UTILITY MODEL
Based on this, there is a need for a new control circuit for heparin pumps that has a lower failure rate for the control of heparin pumps.
The utility model provides a control circuit of heparin pump, the heparin pump includes motor, gear, push rod, cuts somebody's hair, pipeline, and the motor is used for driving the removal of cutting somebody's hair control push rod in the pipeline through the gear when rotating, and control circuit includes:
the motor detection circuit is connected with the motor and used for detecting the rotating speed and the rotating direction of the motor and generating a motor rotating speed signal and a motor rotating direction signal;
the push rod detection circuit is connected with the gear and used for detecting the rotating speed and the steering direction of the gear and generating a gear state signal, and the gear state signal is used for representing the rotating speed and the steering direction of the gear;
the control device is respectively connected with the motor detection circuit and the motor and used for generating a motor control instruction according to a motor rotating speed signal and a motor steering signal, and the motor control instruction is used for controlling the rotation and the stop of the motor; and
and the protection device is respectively connected with the push rod detection circuit and the motor and used for obtaining the push rod speed and the push rod direction of the push rod according to the gear state signal and generating a power supply control command, and the power supply control command is used for controlling the power-on and power-off of the motor.
In one embodiment, the control circuit further comprises:
and the driving chip is respectively connected with the motor and the control device and used for controlling the rotation and the stop of the motor according to the motor control instruction.
In one embodiment, the motor detection circuit includes:
the Hall sensing module is respectively connected with the motor and the control device and used for detecting the rotating speed and the rotating direction of the motor, generating a motor rotating speed signal and a motor rotating direction signal and sending the motor rotating speed signal to the control device;
and the steering detection circuit is respectively connected with the Hall sensing module and the control device and used for obtaining the motor steering according to the motor steering signal and sending the motor steering to the control device.
In one embodiment, the push rod detection circuit includes:
and the sliding end of the first sliding resistor is respectively connected with the gear and the protection device and used for sending a first sliding voltage according to the movement of the gear.
In one embodiment, the control circuit further comprises:
and the power switch is respectively connected with the protection device and the motor and used for conducting or disconnecting according to the power control instruction.
In one embodiment, the control circuit further comprises:
the laminating detection circuit is respectively connected with the push head and the control device and is used for detecting the laminating state of the push head and the push rod and generating a laminating signal;
the control device is further used for obtaining a pushing head attaching state according to the attaching signal and generating a motor control instruction according to the pushing head attaching state.
In one embodiment, the fit detection circuit includes a photoelectric switch.
In one embodiment, the control circuit further comprises:
the pipe diameter detection circuit is respectively connected with the pipeline and the control device and is used for detecting the pipe diameter of the pipeline and generating a pipe diameter detection signal;
the control device is also used for obtaining the pipe diameter of the pipeline according to the pipe diameter detection signal and generating a motor control instruction according to the pipe diameter of the pipeline.
In one embodiment, the control circuit further comprises:
the pressure detection circuit is respectively connected with the pipeline and the control device and is used for detecting the pipeline pressure of the pipeline and generating a pressure detection signal;
the control device is also used for judging whether the pipeline is blocked according to the pressure detection signal and generating a motor control instruction for controlling the motor to stop when the pipeline is judged to be blocked.
In one embodiment, the control circuit further comprises:
the gear meshing detection circuit is respectively connected with the gear and the control device and used for detecting the gear meshing state and generating a meshing detection signal;
the control device is also used for judging whether the gear is in abnormal meshing according to the meshing detection signal and generating a motor control instruction for controlling the motor to stop when judging that the gear is in abnormal meshing;
and the upper computer is respectively connected with the control device and the protection device and is used for displaying the motor control instruction and the power supply control instruction and giving a fault alarm when the motor control instruction is used for controlling the motor to stop or the power supply control instruction is used for controlling the motor to lose power.
The control circuit of the heparin pump comprises a control device connected with a motor detection circuit and a protection device connected with a push rod detection circuit, wherein the control device generates a motor control instruction for controlling the motor to rotate and stop according to the rotating speed and the rotating direction of the motor detected by the motor detection circuit, and the protection device generates a power supply control instruction for controlling the motor to be powered on and powered off according to a gear state signal which is used for representing the rotating speed and the rotating direction of a gear and detected by the push rod detection circuit. This application passes through controlling means control motor and rotates and stop, through the circular telegram and the mistake electricity of protection device control motor, and both are independent to the control of motor for when arbitrary one of controlling means or protection device breaks down, can not influence the control circuit of heparin pump to the control of motor, reach the purpose that reduces the control fault rate that control circuit exists to heparin pump control in-process.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram showing a control circuit of a heparin pump in embodiment 1;
FIG. 2 is a block diagram showing the structure of a control circuit of the heparin pump in embodiment 2;
FIG. 3 is a block diagram showing the structure of a control circuit of the heparin pump in embodiment 3;
FIG. 4 is a schematic diagram of a circuit structure of a Hall sensing module in an embodiment;
FIG. 5 is a schematic circuit diagram of an embodiment of a steering detection circuit;
FIG. 6 is a block diagram showing the structure of a control circuit of the heparin pump in embodiment 4;
FIG. 7 is a schematic circuit diagram of a power module according to an embodiment;
FIG. 8 is a block diagram showing the structure of a control circuit of the heparin pump in embodiment 5;
FIG. 9 is a circuit diagram of a tube diameter detecting circuit according to an embodiment;
fig. 10 is a schematic circuit diagram of an embodiment of an optoelectronic switch circuit.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
During the blood purification process, heparin needs to be injected into the blood pipeline by controlling a heparin pump so as to complete the blood purification process. The heparin pump comprises a motor, a gear, a push head, a push rod and a pipeline, and the specific control principle of the heparin pump is as follows: the gear can be driven by the rotation of the control motor, when the gear rotates, the push head is driven, and driving force is provided for the push rod through the push head, so that the push rod moves in the pipeline, and the output of heparin is realized.
The typical heparin pump is controlled by a single system, i.e. the operation of the heparin pump is controlled by a control circuit, when the control circuit is abnormal, the heparin pump is in a problem of abnormal control, i.e. the heparin pump is in a control state of failure, which may affect the physical health of a patient using the heparin pump.
Referring to fig. 1, a block diagram of a control circuit of the heparin pump in embodiment 1 is shown.
In order to solve the above problem, in one embodiment, the present application provides a control circuit of a heparin pump, the heparin pump includes a motor 102, a gear 104, a push rod 106, a push head 108, and a tube 110, the motor 102 is used for driving the push head 106 through the gear 104 when rotating to control the movement of the push rod 108 in the tube 110, as shown in fig. 1, the control circuit of the heparin pump includes:
the motor detection circuit 202 is connected with the motor 102 and used for detecting the rotating speed and the rotating direction of the motor 102 and generating a motor rotating speed signal and a motor rotating direction signal;
the push rod detection circuit 302 is connected with the gear 104 and is used for detecting the rotating speed and the steering direction of the gear 104 and generating a gear state signal, and the gear state signal is used for representing the rotating speed and the steering direction of the gear 104;
the control device 204 is respectively connected with the motor detection circuit 202 and the motor 102, and is used for generating a motor control instruction according to a motor rotating speed signal and a motor steering signal, wherein the motor control instruction is used for controlling the rotation and the stop of the motor 102;
and the protection device 304 is respectively connected with the push rod detection circuit 302 and the motor 102, and is used for obtaining the push rod speed and the push rod direction of the push rod 108 according to the gear state signal and generating a power supply control instruction, wherein the power supply control instruction is used for controlling the power-on and power-off of the motor 102.
In the working process of the heparin pump, the motor detection circuit 202 detects the rotating speed and the rotating direction of the motor 102, and sends a motor rotating speed signal and a motor rotating direction signal generated according to the rotating speed and the rotating direction of the motor 102 to the control device 204, and after the control device 204 acquires the motor rotating speed signal and the motor rotating direction signal, a motor control instruction for controlling the motor to rotate and stop is generated, namely when the motor rotating speed signal or the motor rotating direction signal does not meet the preset condition, the motor control instruction for controlling the motor to stop is generated, so that the safety problem caused by abnormal rotating speed or rotating direction of the motor is avoided. The push rod detection circuit 302 detects the rotation speed and the rotation direction of the gear 104, and sends a gear state signal generated according to the detected rotation speed and the rotation direction to the protection device 304, after the protection device 304 acquires the gear state signal, the gear state signal is converted to obtain the push rod speed and the push rod direction of the push rod, and a power supply control instruction for controlling the power on and power off of the motor 102 is generated according to the obtained push rod speed and the push rod direction, and the motor 102 stops working when powered on, namely when power off, which is equivalent to controlling the motor 102 to work and stop according to the push rod speed and the push rod direction. The heparin pump drives the gear to rotate through the rotation of the motor, so that the push head is controlled to drive the connected push rod to move, the motor can only rotate when being electrified and stops when being powered off, therefore, the detection of the rotation speed and the rotation direction of the motor by the motor detection circuit 202 is equal to the detection of the rotation speed and the rotation direction of the gear 104 by the push rod detection circuit 302, and the control device 204 controls the rotation and the stop of the motor 102 to be similar to the control of the power on and the power off of the motor 102 by the protection device 304; the control device 204 and the protection device 304 in the application jointly form a double system, so that double system control of the control circuit on the heparin pump is realized, the double system control is equivalent to monitoring and controlling the work of the heparin pump through two independent links, the control on the heparin pump is not influenced when one link has a problem, and the purpose of reducing the control fault of the heparin pump is achieved.
Referring to fig. 2, a block diagram of a control circuit of the heparin pump in embodiment 2 is shown.
As shown in fig. 2, in one embodiment, the control circuit further comprises:
and the driving chip 206 is respectively connected with the motor 102 and the control device 204, and is used for controlling the rotation and stop of the motor 102 according to the motor control instruction. After receiving the motor control command sent by the control device 204, the driver chip 206 sends a control command to the motor 102 to control the motor 102 to rotate or stop.
In one embodiment, the control device 204 obtains a motor speed V1 according to the motor speed signal, generates a motor fault enable signal and motor speed alarm information when the motor speed V1 exceeds a preset motor speed range, and generates a speed adjustment command when the motor speed V1 does not exceed the preset motor speed range and is not equal to a motor speed threshold Vt; the control device 204 further obtains the motor steering according to the motor steering signal, and generates a motor fault enabling signal and motor steering alarm information when the motor steering is different from the preset direction. When receiving the speed adjustment instruction sent by the control device 204, the driving chip 206 adjusts the rotation speed of the motor 102 according to the speed adjustment instruction, such as acceleration control or deceleration control; when the driving chip 206 receives the motor fault enable signal sent by the control device 204, the driving chip controls the motor to stop rotating according to the motor fault enable signal, so as to prevent the motor from generating a rotating speed fault state or a steering fault state.
In one embodiment, the driver chip 206 is a TH86128 chip.
In one embodiment, the control device 204 is an STM32F103RDT6 chip.
Referring to fig. 3, a block diagram of a control circuit of the heparin pump in embodiment 3 is shown.
As shown in fig. 3, in one embodiment, the motor detection circuit 202 includes:
the hall sensing module 2021 is respectively connected to the motor 102 and the control device 204, and is configured to detect a rotational speed and a rotational direction of the motor 102, generate a motor rotational speed signal and a motor rotational direction signal, and send the motor rotational speed signal to the control device 204;
the steering detection circuit 2022 is connected to the hall sensing module 2021 and the control device 204, respectively, and is configured to obtain motor steering according to the motor steering signal, and send the motor steering to the control device 204.
The hall sensing module 2021 obtains a motor rotation speed signal and a motor steering signal of the motor 102 by detecting a variation of a magnetic field of a magnet attached to the motor 102, and the steering detection circuit 2022 obtains a motor steering according to the motor steering signal output by the hall sensing module 2021 and sends the motor steering to the control device 204.
Fig. 4 is a schematic circuit structure diagram of the hall sensing module in an embodiment.
As shown in fig. 4, the hall sensing module 2021 includes a hall sensor U1 and a hall sensor U2, and the hall sensor U1 and the hall sensor U2 convert the change of the magnetic field into an electrical signal to realize the rotation speed and rotation direction detection function of the motor; one end of the resistor R1 is connected with the common end of the Hall sensor U1 and the 3.3V power supply, the other end of the resistor R1 is respectively connected with one end of the capacitor C1 and the output end SPEED _ HALL _ A of the Hall sensor U1, and the other end of the capacitor C1 is connected with the grounding end of the Hall sensor U1. One end of the resistor R2 is connected with the common end of the Hall sensor U2 and the 3.3V power supply, the other end of the resistor R2 is respectively connected with one end of the capacitor C2 and the output end SPEED _ HALL _ B of the Hall sensor U2, and the other end of the capacitor C2 is connected with the grounding end of the Hall sensor U2. The resistor R1 and the resistor R2 are used for achieving a voltage pull-up function, and the capacitors C1 and C2 are used for achieving voltage stabilizing and filtering functions, so that the Hall sensor U1 and the Hall sensor U2 can output accurate motor speed signals and motor steering signals.
In one embodiment, the Hall sensors U1 and U2 are both A3212 sensors.
Fig. 5 is a schematic circuit diagram of the steering detection circuit in an embodiment.
As shown in fig. 5, the steering detection circuit 2022 includes a 74HC74 chip U3, a resistor R3, a resistor R4, a resistor R5, and a capacitor C3, wherein a first end of the capacitor C3 is connected to a VCC terminal of the 74HC74 chip U3, a second end of the capacitor C3 is grounded, and when the VCC terminal of the 74HC74 chip U3 is connected to +3.3V power supply energy, the capacitor C3 realizes a function of stabilizing a voltage of the power supply terminal, so as to supply power to the 74HC74 chip U3. The 2D end of the 74HC74 chip U3 is connected with the output end SPEED _ HALL _ A of the Hall sensor U1, the 2CLK end is connected with the output end SPEED _ HALL _ B of the Hall sensor U2, and the 74HC74 chip U3 processes signals received by the 2D end and the 2CLK end to obtain the motor steering of the motor 102.
Referring to fig. 6, a block diagram of a control circuit of the heparin pump in embodiment 4 is shown.
As shown in fig. 6, in one embodiment, the push rod detection circuit 302 includes:
and a first sliding resistor R6, a sliding end of which R6 is connected with the gear 104 and the protection device 304 respectively, for sending a first sliding voltage according to the movement of the gear 104.
When the gear 104 rotates, the sliding end of the first sliding resistor R6 is driven to move, at this time, the resistance value of the first sliding resistor R6 changes, the first sliding voltage obtained by the protection device 304 changes, the protection device 304 can obtain the stroke and the moving direction of the push rod 106 according to the obtained first sliding voltage, for example, if the resistance value of the first sliding rheostat R6 gradually increases, heparin is output (forward movement); when the resistance value of the first slide resistor R6 becomes gradually smaller, the movement is reversed. The ram speed may be derived from the stroke and travel time of the ram 106.
In one embodiment, the protection device 304 is further configured to determine whether the push rod speed is within a preset push rod speed range and the push rod moving direction is correct, generate a power control command of the power-off enable signal when the push rod speed is not within the preset push rod speed range or the push rod moving direction is different from the preset direction, generate push rod speed alarm information when the push rod speed is not within the preset push rod speed range, and generate push rod direction alarm information when the push rod moving direction is different from the preset direction. The protection device 304 controls the motor to stop when the power is lost according to the power control instruction of the power loss enabling signal, that is, controls the power supply of the motor to stop supplying power to the motor, so that the motor is powered off.
In one embodiment, the push rod detection circuit 302 further comprises:
one end of the resistor R7 and one end of the resistor R7 are connected to one end of the first sliding resistor R6, and the other end of the resistor R7 is grounded.
In one embodiment, the control circuit further comprises:
and the power supply module 208 is connected with the control device 204 and used for supplying power to the control device 204.
As shown in fig. 7, which is a schematic diagram of a circuit structure of the power supply module in an embodiment, the NP1482 chip U4 is a power supply chip, the power supply module 208 mainly realizes a voltage regulation function through the MP1482 chip U4, and steps down an accessed 12V voltage to a 5V voltage for the control device 204, so as to meet a rated power supply requirement of the control device 204; here, 12V and 5V belong to given voltage reference values, and in practical applications, the power supply module 208 converts the input voltage into the supply voltage of the control device 204 as required. The capacitors C14, C15, C16, C17, C19, C20, C21, C22 and C23 are capacitors with voltage stabilizing and filtering functions; the resistors R31 and R32 are resistors for realizing a voltage feedback function, and after voltage sampling is carried out through the resistor R32, feedback voltage can be transmitted to the MP1482 chip U4 so as to realize voltage feedback; the resistors RT1, R29, R30 and R33 are used for realizing a current conversion function; the LED diode D8 is used to realize the light emitting indication function, and when the power module 208 outputs 5V voltage, the LED emits light; when the power supply module 208 does not output the voltage of 5V, the light emitting diode LED does not emit light.
Fig. 8 is a block diagram showing a control circuit of the heparin pump in embodiment 5.
As shown in fig. 8, in one embodiment, the control circuit further comprises:
and the power switch K1 is respectively connected with the protection device 304 and the motor 102 and is used for conducting on or off according to a power control command.
When the power switch K1 is turned on, the motor power supply supplies power to the motor, the motor is in a power supply state, and when the power switch K1 is turned off, the motor power supply stops supplying power to the motor, and the motor is in a power loss state.
In one embodiment, the control circuit further comprises:
the fit detection circuit 210 is respectively connected with the push head 108 and the control device 204 and is used for detecting the fit state of the push head 108 and the push rod 106 and generating fit signals;
the control device 204 is further configured to obtain a pushing head attaching state according to the attaching signal, and generate a motor control instruction according to the pushing head attaching state.
Specifically, after obtaining the attachment state of the pusher according to the attachment signal, if the pusher 108 and the pusher 106 are not attached to each other, the control device 204 generates attachment failure alarm information and an attachment failure enable signal, and generates a motor control instruction for controlling the motor to stop according to the attachment failure enable signal, so as to prevent the heparin pump from operating when the pusher and the pusher are in the attachment failure state. If the push head and the push rod are not attached, the push head can generate 'idle push', the injection precision of the heparin pump is affected, the control error of heparin output is caused, and the control device 204 controls the motor to stop running at the moment, so that the problem of heparin output error can be prevented.
In one embodiment, the control circuit further comprises:
a pipe diameter detection circuit 212, which is respectively connected to the pipeline 110 and the control device 204, and is used for detecting the pipe diameter of the pipeline 110 and generating a pipe diameter detection signal;
the control device 204 is further configured to obtain a pipe diameter of the pipeline according to the pipe diameter detection signal, and generate a motor control instruction according to the pipe diameter of the pipeline.
Specifically, after the control device 204 obtains the pipe diameter of the pipe according to the pipe diameter detection signal, it is determined whether the pipe diameter of the pipe is within a preset pipe diameter range, when the control device 204 determines that the pipe diameter of the pipe is not within the preset pipe diameter range, a pipe diameter fault alarm message and a pipe diameter fault enable signal are generated, and a motor control instruction for controlling the motor to stop is generated according to the pipe diameter fault enable signal, so as to prevent the heparin pump from operating in a state of error pipe diameter of the pipe.
In one embodiment, the control circuit further comprises:
a pressure detection circuit 214, which is respectively connected to the pipeline 110 and the control device 204, and is configured to detect a pipeline pressure of the pipeline 110 and generate a pressure detection signal;
the control device 204 is also used for determining whether the pipeline 110 is blocked according to the pressure detection signal and generating a motor control command for controlling the motor to stop when the pipeline is determined to be blocked.
Specifically, after the control device 204 obtains the pressure of the pipeline according to the pressure detection signal, it determines whether the pipeline is blocked according to the pressure of the pipeline, and when the control device 204 determines that the pipeline is blocked, it generates a pressure abnormality alarm message and a pressure abnormality enable signal, and generates a motor control instruction for controlling the motor to stop according to the pressure enable signal, so as to prevent the heparin pump from operating in a state that the pipeline is blocked.
In one embodiment, the control circuit further comprises:
a meshing detection circuit 216, connected to the gear 104 and the control device 204, respectively, for detecting a meshing state of the gear 104 and generating a meshing detection signal;
the control device 204 is further configured to determine whether the gear 104 is in an abnormal meshing state according to the meshing detection signal, and generate a motor control command for controlling the motor to stop when it is determined that the gear 104 is in the abnormal meshing state;
and the upper computer 402 is respectively connected with the control device 204 and the protection device 304 and is used for displaying a motor control instruction and a power supply control instruction and giving a fault alarm when the motor control instruction is a motor control instruction for controlling the motor to stop or the power supply control instruction is a power supply control instruction for controlling the motor to lose power.
Specifically, the control device 204 determines whether the gear 104 is in a meshing abnormality or not according to the meshing detection signal, generates a meshing failure alarm message and a meshing failure enable signal when the control device 204 determines that the gear 104 is in the meshing abnormality, and generates a motor control command for controlling the motor to stop according to the meshing failure enable signal so as to prevent the heparin pump from operating in a meshing error state.
In one embodiment, the tube diameter detection circuit 212 includes a second sliding resistor. The control device 204 detects the pipe diameter of the pipe of the heparin pump according to the resistance value of the second slide rheostat, when the control device 204 judges that the pipe diameter of the pipe is not within the preset value range, a pipe diameter fault alarm message and a pipe diameter fault enable signal are generated, and a motor control instruction for controlling the motor to stop is generated according to the pipe diameter fault enable signal, so that the heparin pump is prevented from running under the state of error pipe diameter of the pipe.
Fig. 9 is a schematic circuit diagram of a pipe diameter detection circuit in an embodiment. The capacitor C4 is used for keeping the voltage across the second sliding rheostat R6 stable; wherein "2" is the sliding end of the second slide rheostat, when the sliding end moves, the resistance value of the moving end of the second slide rheostat changes, when different pipe diameters are placed, the resistance of the second slide rheostat R6 changes, which is equivalent to the voltage "TUBE _ VAR" in FIG. 9 changes; namely, a corresponding value exists between the resistance value and the pipe diameter of the pipeline, and further the pipe diameter measurement is realized. When the resistance value is not changed, it indicates that the second slide rheostat R6 has failed, and the control device 204 generates a motor control command for controlling the motor to stop.
In one embodiment, the pressure detection circuit 214 is a pressure sensor. When the pipeline is blocked, the thrust of the pushing head is increased, the pressure in the pipeline is increased, and therefore whether the pipeline breaks down or not can be judged by detecting the pressure of the pipeline.
In one embodiment, the fit detection circuit 210 and the ratcheting detection circuit 216 are both photo-switch circuits.
Fig. 10 is a schematic circuit diagram of an embodiment of the optoelectronic switch circuit.
In fig. 10, the photoelectric switch U5 has a light emitting diode and a light receiver, wherein the light emitted by the optical coupler is blocked to determine whether the push rod and the push rod are attached; the resistors R7 and R8 are used to make the light emitting diode and the light receiver in the photoelectric switch U5 be at high level in the initial state, and perform the pull-up function; c5 acts as a voltage regulator. The photoelectric switch U5 utilizes the principle of the optical coupler to detect the engaging state of the pushing head 108 and the pushing rod 106 and the engaging state of the gear 104, for example, when the pushing head 108 and the pushing rod 106 are engaged, the light of the optical coupler is blocked, so that the electrical signal (equivalent to the engaging signal) changes, and in fact, the change of the engaging state changes the change of the light emitting amount of the optical coupler. When the push head is jointed with the push rod, light emitted by the optical coupler is shielded, and then a corresponding joint signal is obtained; for example, when the push head and the push rod are not attached, the light emitted by the optical coupler is not shielded; and then the joint state detection of the push head and the push rod is realized. Similarly, for example, when the photoelectric switch circuit is arranged on the upper gear and the lower gear of the gear, when the upper gear and the lower gear are normally meshed, the light emitted by the optical coupler is shielded; when the upper gear and the lower gear are not normally meshed, light emitted by the optical coupler is not shielded; therefore, the meshing signal is obtained through the photoelectric switch circuit, and further the meshing state detection is achieved.
The control circuit of the heparin pump comprises a control device connected with a motor detection circuit and a protection device connected with a push rod detection circuit, wherein the control device generates a motor control instruction for controlling the motor to rotate and stop according to the rotating speed and the rotating direction of the motor detected by the motor detection circuit, and the protection device generates a power supply control instruction for controlling the motor to be powered on and powered off according to a gear state signal which is used for representing the rotating speed and the rotating direction of a gear and detected by the push rod detection circuit. This application passes through controlling means control motor and rotates and stop, through the circular telegram and the mistake electricity of protection device control motor, and both are independent to the control of motor for when arbitrary one of controlling means or protection device breaks down, can not influence the control circuit of heparin pump to the control of motor, reach the purpose that reduces the control fault rate that control circuit exists to heparin pump control in-process.
The control circuit of the heparin pump can be applied to blood purification equipment or the like.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a control circuit of heparin pump, the heparin pump includes motor, gear, push rod, cuts somebody's hair, pipeline, the motor is used for driving the removal of cutting somebody's hair in the pipeline through the gear when rotating to control the push rod, its characterized in that, control circuit includes:
the motor detection circuit is connected with the motor and used for detecting the rotating speed and the rotating direction of the motor and generating a motor rotating speed signal and a motor rotating direction signal;
the push rod detection circuit is connected with the gear and used for detecting the rotating speed and the steering direction of the gear and generating a gear state signal, and the gear state signal is used for representing the rotating speed and the steering direction of the gear;
the control device is respectively connected with the motor detection circuit and the motor and used for generating a motor control instruction according to the motor rotating speed signal and the motor steering signal, and the motor control instruction is used for controlling the rotation and the stop of the motor; and
and the protection device is respectively connected with the push rod detection circuit and the motor and used for obtaining the push rod speed and the push rod direction of the push rod according to the gear state signal and generating a power supply control command, and the power supply control command is used for controlling the power-on and power-off of the motor.
2. The control circuit of claim 1, further comprising:
and the driving chip is respectively connected with the control device and the motor and is used for controlling the rotation and the stop of the motor according to the motor control instruction.
3. The control circuit of claim 1, wherein the motor detection circuit comprises:
the Hall sensing module is respectively connected with the motor and the control device and is used for detecting the rotating speed and the steering of the motor, generating a motor rotating speed signal and a motor steering signal and sending the motor rotating speed signal to the control device;
and the steering detection circuit is respectively connected with the Hall sensing module and the control device and used for obtaining motor steering according to the motor steering signal and sending the motor steering to the control device.
4. The control circuit of claim 1, wherein the pushrod detection circuit comprises:
and the sliding end of the first sliding resistor is respectively connected with the gear and the protection device and used for sending a first sliding voltage according to the movement of the gear.
5. The control circuit of claim 1, further comprising:
and the power switch is respectively connected with the protection device and the motor and used for conducting or disconnecting according to the power control instruction.
6. The control circuit of claim 1, further comprising:
the laminating detection circuit is respectively connected with the push head and the control device and is used for detecting the laminating state of the push head and the push rod and generating a laminating signal;
the control device is further used for obtaining a pushing head attaching state according to the attaching signal and generating a motor control instruction according to the pushing head attaching state.
7. The control circuit of claim 6, wherein the fit detection circuit comprises a photoelectric switch.
8. The control circuit of claim 1, further comprising:
the pipe diameter detection circuit is respectively connected with the pipeline and the control device and is used for detecting the pipe diameter of the pipeline and generating a pipe diameter detection signal;
the control device is further used for obtaining the pipe diameter of the pipeline according to the pipe diameter detection signal and generating a motor control instruction according to the pipe diameter of the pipeline.
9. The control circuit of claim 1, further comprising:
the pressure detection circuit is respectively connected with the pipeline and the control device and is used for detecting the pipeline pressure of the pipeline and generating a pressure detection signal;
the control device is also used for judging whether the pipeline is blocked according to the pressure detection signal and generating a motor control instruction for controlling the motor to stop when the pipeline is judged to be blocked.
10. The control circuit of claim 1, further comprising:
the gear meshing detection circuit is respectively connected with the gear and the control device and used for detecting the gear meshing state of the gear and generating a meshing detection signal;
the control device is also used for judging whether the gear is in abnormal meshing according to the meshing detection signal and generating a motor control command for controlling the motor to stop when judging that the gear is in abnormal meshing;
and the upper computer is respectively connected with the control device and the protection device and is used for displaying the motor control instruction and the power supply control instruction and giving a fault alarm when the motor control instruction is used for controlling the motor to stop or the power supply control instruction is used for controlling the motor to lose power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022844952.5U CN213846473U (en) | 2020-11-30 | 2020-11-30 | Control circuit of heparin pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022844952.5U CN213846473U (en) | 2020-11-30 | 2020-11-30 | Control circuit of heparin pump |
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| Publication Number | Publication Date |
|---|---|
| CN213846473U true CN213846473U (en) | 2021-07-30 |
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| CN202022844952.5U Active CN213846473U (en) | 2020-11-30 | 2020-11-30 | Control circuit of heparin pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116849789A (en) * | 2023-07-24 | 2023-10-10 | 广州爱锘德医疗器械有限公司 | Bone cement injection equipment and anti-runaway device, control method and controller thereof |
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2020
- 2020-11-30 CN CN202022844952.5U patent/CN213846473U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116849789A (en) * | 2023-07-24 | 2023-10-10 | 广州爱锘德医疗器械有限公司 | Bone cement injection equipment and anti-runaway device, control method and controller thereof |
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