Self-adaptive heating device, control method and peritoneal dialysis machine

Abstract

The invention relates to the field of medical equipment, in particular to a self-adaptive heating device, a control method and a peritoneal dialysis machine.The control method comprises the steps that a standard temperature measuring instrument and a temperature sensor are used for collecting the temperature in the continuous heating starting process and the continuous heating stopping process of the peritoneal dialysis machine, and a compensation coefficient is calculated; calculating an actual target temperature based on the compensation coefficient; the dialysate temperature detected by the temperature sensor is compared with the actual target temperature, and a temperature difference value is generated; the temperature difference value at each moment is converted into a control signal through a preset control algorithm, and the controller outputs the control signal to control the relay to be turned on or turned off, so that the heating device is controlled to heat up and stop heating up. The compensation coefficient is determined based on the heating duration, the actual target temperature is dynamically obtained, then the relay is controlled to be turned off or turned on, and the problems that temperature control is too low, too high and too slow due to hysteresis of feedback of a temperature sensor are solved.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to an adaptive heating device, a control method and a peritoneal dialysis machine. Background Art

[0002] In peritoneal dialysis control systems, in order to reduce the discomfort caused by the dialysate entering the patient's abdominal cavity, the peritoneal dialysis fluid needs to be heated to an appropriate temperature, such as around 37°C, before being injected into the human body. Therefore, temperature control of the dialysate is an important foundation of peritoneal dialysis machines.

[0003] In the prior art, when performing preset temperature control, heating is generally performed at a constant power. When the heated dialysate exceeds the preset temperature, heating is stopped, and when it is lower than the preset temperature, heating is started.

[0004] For example, the Chinese invention patent application publication number CN115671428A discloses a dialysate heating device, including a heating device, a heating control system, a temperature acquisition circuit, a monitoring control system, a temperature monitoring circuit and an over-temperature protector; the heating device includes a heating sheet and a heating plate; the heating control system includes a first controller, a first control circuit and a first relay; the monitoring control system includes a second controller, a second control circuit and a second relay; the over-temperature protector is used to detect the temperature of the heating device and disconnect the heating device from the power supply when the temperature of the heating device exceeds a preset temperature.

[0005] However, if the temperature sensor feedback in the temperature acquisition circuit has a lag, this solution will cause the dialysate temperature obtained to be lower or higher than the actual temperature, which will cause the heating to stop prematurely or too late, resulting in problems of temperature control being too low, too high, or too slow. Summary of the Invention

[0006] In order to overcome the problems existing in the prior art, the present invention aims to provide an adaptive heating device and control method for compensating for the hysteresis value of the temperature sensor and solving problems such as temperature control being too low, too high or too slow.

[0007] To achieve the above object, the present invention provides the following technical solution: an adaptive heating control method, comprising the following steps:

[0008] S1: Use a standard temperature measuring instrument and the temperature sensor of the peritoneal dialysis machine to simultaneously collect the temperature of the peritoneal dialysis machine during the continuous heating process and the continuous heating process, and calculate the compensation coefficient;

[0009] S2: Set the preset temperature of the dialysate;

[0010] S3: Calculate the actual target temperature based on the compensation coefficient;

[0011] S4: Compare the dialysate temperature detected by the temperature sensor with the actual target temperature to generate a temperature difference E;

[0012] S5: The controller converts the temperature difference E at each moment into a corresponding control signal through a preset control algorithm. The controller outputs the control signal to control the opening or closing of the relay, thereby controlling the heating device to heat up or stop heating, and further controlling the temperature of the dialysate;

[0013] S6: Repeat steps S3 to S5 to implement adaptive heating control.

[0014] The present invention is further configured such that the compensation coefficient in step S1 is calculated by the following formula:

[0015] When heating is turned on continuously:

[0016]

[0017] △n1=n b1 -n c1

[0018] Among them, a1 is the continuous heating compensation coefficient; t1 is the continuous heating time; △n1 is the temperature n measured by the standard temperature measuring instrument when the heating is continuously turned on. b1 The temperature n measured by the temperature sensor c1 The difference between

[0019] In the continuous stop heating state:

[0020]

[0021] △n2=n b2 -n c2

[0022] Among them, a2 is the compensation coefficient for continuous heating stop; t2 is the duration of continuous heating stop; △n2 is the temperature n measured by the standard temperature measuring instrument when continuous heating is stopped. b2 The temperature n measured by the temperature sensor c2 The difference.

[0023] The present invention is further configured such that: the standard temperature measuring instrument is immersed in the dialysate to be measured.

[0024] The present invention is further configured as follows: in step S3, the actual target temperature is calculated by the following formula:

[0025] z=a1t1+a2t2+b

[0026] Where z is the actual target temperature and b is the preset temperature.

[0027] The present invention is further configured as follows: in step S4, the temperature difference E is calculated by the following formula:

[0028] E=n c -z

[0029] n c is the temperature measured by the temperature sensor in the current state, and z is the actual target temperature z.

[0030] The present invention is further configured as follows: the preset control algorithm in step S5 is specifically:

[0031] When E≥0, the controller outputs a control signal to close the relay;

[0032] When E<0, the controller outputs a control signal to turn on the relay.

[0033] The present invention also includes an adaptive heating device for use with the above-mentioned adaptive heating control method, comprising a controller, a relay, a temperature sensor, a standard temperature measuring instrument and a heating device;

[0034] The temperature sensor and the standard temperature measuring instrument are used to detect the dialysate temperature and transmit the temperature data to the controller;

[0035] The controller is used to receive dialysate temperature data detected by the temperature sensor, compare the temperature data with the actual target temperature value, derive a control signal according to an adaptive heating control algorithm, and control the relay;

[0036] The relay is used to open and close according to the control signal to input power to the heating device;

[0037] The heating device is used to heat the dialysate.

[0038] The present invention is further configured as follows: the adaptive heating device also includes a dialysate bag, the dialysate bag is placed on the heating device, the standard temperature measuring instrument is immersed in the dialysate in the dialysate bag, and the temperature sensor is arranged between the heating device and the dialysate bag.

[0039] The present invention also relates to a peritoneal dialysis machine which uses the above-mentioned adaptive heating control method for temperature control.

[0040] The present invention also relates to a peritoneal dialysis machine comprising the above-mentioned adaptive heating device.

[0041] In summary, the beneficial effects of the above technical solution of the present invention are as follows:

[0042] The present invention calculates a compensation coefficient based on the heating duration and provides a method for adjusting the actual temperature control target. During the temperature control process, the actual target temperature is obtained by combining the continuous heating on and off durations with the compensation coefficient, using standard temperature measuring instruments and temperature sensor values to determine whether there is feedback lag. The relay is controlled to turn on or off based on the actual target temperature, thus avoiding problems such as temperature control being too low, too high, or too slow due to the lag in temperature sensor feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 is a flow chart of the adaptive heating control method.

[0045] Figure 2 This is a schematic diagram of the adaptive heating device.

[0046] The meanings of the reference numerals in the accompanying drawings are as follows:

[0047] 100. Dialysis fluid bag, 200. Standard temperature measuring instrument, 300. Temperature sensor, 400. Relay, 500. Heating device, 600. Controller. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of the present invention.

[0049] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0050] Example 1:

[0051] like Figure 1 FIG. 1 is a preferred embodiment of the present invention, an adaptive heating control method, comprising the following steps:

[0052] S1: Use a standard temperature measuring instrument and the temperature sensor of the peritoneal dialysis machine to simultaneously collect the temperature of the peritoneal dialysis machine during the continuous heating process and the continuous heating process, and calculate the compensation coefficient;

[0053] The standard temperature measuring instrument is immersed in the dialysate to be measured.

[0054] The compensation coefficient is calculated by the following formula:

[0055] When heating is turned on continuously:

[0056]

[0057] △n1=n b1 -n c1

[0058] Among them, a1 is the continuous heating compensation coefficient; t1 is the continuous heating time; △n1 is the temperature n measured by the standard temperature measuring instrument when the heating is continuously turned on. b1 The temperature n measured by the temperature sensor c1 The difference between

[0059] In the continuous stop heating state:

[0060]

[0061] △n2=n b2 -n c2

[0062] Among them, a2 is the compensation coefficient for continuous heating stop; t2 is the duration of continuous heating stop; △n2 is the temperature n measured by the standard temperature measuring instrument when continuous heating is stopped. b2 The temperature n measured by the temperature sensor c2 The difference.

[0063] S2: Set the preset temperature of the dialysate;

[0064] S3: Calculate the actual target temperature based on the compensation coefficient;

[0065] In step S3, the actual target temperature is calculated by the following formula:

[0066] z=a1t1+a2t2+b

[0067] Where z is the actual target temperature and b is the preset temperature.

[0068] S4: Compare the dialysate temperature detected by the temperature sensor with the actual target temperature to generate a temperature difference E;

[0069] E=n c -z

[0070] n c is the temperature measured by the temperature sensor in the current state, and z is the actual target temperature z.

[0071] S5: The controller converts the temperature difference E at each moment into a corresponding control signal through a preset control algorithm. When E≥0, the controller outputs a control signal to close the relay; when E<0, the controller outputs a control signal to open the relay, thereby controlling the heating device to heat up or stop heating;

[0072] S6: Repeat steps S3 to S5 to implement adaptive heating control.

[0073] Example 2:

[0074] like Figure 2 As shown, the present invention also includes an adaptive heating device, used in conjunction with the above-mentioned adaptive heating control method, including a controller 600, a relay 400, a temperature sensor 300, a standard temperature measuring instrument 200 and a heating device 500;

[0075] The temperature sensor 300 and the standard temperature measuring instrument 200 are used to detect the dialysate temperature and transmit the temperature data to the controller 600;

[0076] The adaptive heating device also includes a dialysate bag 100 , which is placed on the heating device 500 , the standard temperature measuring instrument 200 is immersed in the dialysate in the dialysate bag 100 , and the temperature sensor 300 is arranged between the heating device 500 and the dialysate bag 100 .

[0077] The controller 600 is used to receive dialysate temperature data detected by the temperature sensor 300 , compare the temperature data with an actual target temperature value, and derive a control signal according to an adaptive heating control algorithm to control the relay 400 .

[0078] The relay 400 is used to open and close according to a control signal and input power to the heating device 500 .

[0079] The heating device 500 is used to heat the dialysate.

[0080] Example 3:

[0081] The present invention also relates to a peritoneal dialysis machine, which uses the adaptive heating control method described in Example 1 for temperature control.

[0082] Example 4:

[0083] The present invention also relates to a peritoneal dialysis machine, comprising the adaptive heating device described in Example 2.

[0084] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. An adaptive heating control method, characterized in that: The following steps are involved: S1: Use a standard temperature measuring instrument and the temperature sensor of the peritoneal dialysis machine to simultaneously collect the temperature of the peritoneal dialysis machine during the continuous heating process and the continuous heating process, and calculate the compensation coefficient; S2: Set the preset temperature of the dialysate; S3: Calculate the actual target temperature based on the compensation coefficient; S4: Compare the dialysate temperature detected by the temperature sensor with the actual target temperature to generate a temperature difference E; S5: The controller converts the temperature difference E at each moment into a corresponding control signal through a preset control algorithm. The controller outputs the control signal to control the opening or closing of the relay, thereby controlling the heating device to heat up or stop heating; S6: Repeat steps S3 to S5 to implement adaptive heating control.

2. The adaptive heating control method according to claim 1, characterized in that: The compensation coefficient in step S1 is calculated by the following formula: When heating is turned on continuously: △n1=n b1 -n c1 Among them, a1 is the continuous heating compensation coefficient; t1 is the continuous heating time; △n1 is the temperature n measured by the standard temperature measuring instrument when the heating is continuously turned on. b1 The temperature n measured by the temperature sensor c1 The difference between In the continuous stop heating state: △n2=n b2 -n c2 Among them, a2 is the compensation coefficient for continuous heating stop; t2 is the duration of continuous heating stop; △n2 is the temperature n measured by the standard temperature measuring instrument when continuous heating is stopped. b2 The temperature n measured by the temperature sensor c2 The difference.

3. The adaptive heating control method according to claim 1, wherein: The standard temperature measuring instrument is immersed in the dialysate to be measured.

4. The adaptive heating control method according to claim 2, characterized in that: In step S3, the actual target temperature is calculated by the following formula: z=a1t1+a2t2+b Where z is the actual target temperature and b is the preset temperature.

5. The adaptive heating control method according to claim 4, characterized in that: In step S4, the temperature difference E is calculated by the following formula: E=n c -with n c is the temperature measured by the temperature sensor in the current state, and z is the actual target temperature z.

6. The adaptive heating control method according to claim 5, characterized in that: The preset control algorithm in step S5 is specifically: When E≥0, the controller outputs a control signal to close the relay; When E<0, the controller outputs a control signal to turn on the relay.

7. An adaptive heating device, used in conjunction with the adaptive heating control method according to any one of claims 1 to 6, characterized in that: Including controllers, relays, temperature sensors, standard temperature measuring instruments and heating devices; The temperature sensor and the standard temperature measuring instrument are used to detect the dialysate temperature and transmit the temperature data to the controller; The controller is used to receive dialysate temperature data detected by the temperature sensor, compare the temperature data with the actual target temperature value, derive a control signal according to an adaptive heating control algorithm, and control the relay; The relay is used to open and close according to the control signal to input power to the heating device; The heating device is used to heat the dialysate.

8. The adaptive heating device according to claim 7, characterized in that The adaptive heating device further comprises a dialysate bag, which is placed on the heating device, and the temperature sensor is arranged between the heating device and the dialysate bag.

9. A peritoneal dialysis machine, characterized in that: Temperature control is performed using the adaptive heating control method described in any one of claims 1 to 6.

10. A peritoneal dialysis machine, characterized in that: Comprising the adaptive heating device according to claim 7 or 8.

Images