Multi-channel sealing film temperature control system for blood collection tube

Abstract

The utility model discloses a multichannel film sealing temperature control system for blood collection tubes, which comprises a plurality of heating devices, the heating devices are configured to perform heat sealing on aluminum foil films of the blood collection tubes, and each heating device is provided with a temperature sensor used for detecting the temperature of the corresponding heating device; the temperature control board is configured to receive the temperature signal from the temperature sensor and control the working state of the corresponding heating device according to the temperature signal; and an industrial control board and a touch display screen. According to the multi-channel film sealing temperature control system, the multiple heating devices are arranged, each heating device is independently controlled, film sealing treatment can be conducted on the multiple blood collection tubes at the same time, modular design is adopted for the temperature control plate, multi-channel film sealing temperature control over the blood collection tubes is achieved, the sealing treatment efficiency of the blood collection tubes is greatly improved, and the working efficiency of the blood collection tubes is improved. And the safety of blood sampling sample storage and transfer is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood collecting tube equipment technical field especially, it is a kind of multi-channel sealing membrane temperature control system for blood collecting tube. BACKGROUND

[0002] In current medical examination process, blood collecting tube is as the important carrier tool of blood sample collection, storage and transportation, and its sealing treatment is crucial.Blood collecting tube heat sealing membrane sealing mode can effectively prevent sample from being contaminated in the storage process after detection, can ensure the integrity and security of sample, to guarantee the accuracy and reliability of subsequent detection result.

[0003] However, the existing blood collecting tube sealing film mode has many deficiencies.On the one hand, due to the heating temperature is too high or too low in the working process of heating equipment, can lead to sealing film effect is not good, such as aluminum foil film and blood collecting tube mouth unable to closely adhere to, or appear excessive scorching, deformation and other problems.These problems not only affect the sealing and appearance of sealing film, also can cause pollution or damage to sample, and then affect the accuracy of detection result.

[0004] On the other hand, the existing sealing film mode can usually only realize single-channel sealing film processing, cannot meet the needs of large-scale sample collection and examination.And with the continuous progress of technology and the continuous increase of clinical demand, sample quantity presents explosive growth, and single-channel sealing film mode has been unable to meet the efficient, fast sample processing demand.

[0005] Therefore, the utility model provides a new scheme to solve this problem. CONTENT OF UTILITY MODEL

[0006] In view of the above situation, to overcome the defects of prior art, the purpose of the utility model is to provide a kind of multi-channel sealing film temperature control system for blood collecting tube.

[0007] Its solution technical scheme is: a kind of multi-channel sealing film temperature control system for blood collecting tube, comprising:

[0008] A plurality of heating devices, the heating device is configured to heat seal blood collecting tube aluminum foil film, temperature sensor is configured on each heating device, for detecting the temperature of corresponding heating device;

[0009] Temperature control board is configured to receive temperature signal from the temperature sensor, and according to the temperature signal control the working state of corresponding heating device;

[0010] Industrial control board is connected with temperature control board, for processing the control signal of temperature control board;

[0011] Touch display screen is connected with industrial control board, for displaying temperature information and receiving user operation instruction.

[0012] Preferably, the temperature control board comprises:

[0013] a temperature signal processing circuit for filtering the temperature signal output by the temperature sensor and converting the temperature signal from an analog quantity to a digital quantity output;

[0014] a micro control unit circuit for receiving the digital quantity output of the temperature signal processing circuit in real time and performing PID operation processing on the received data;

[0015] a load driving circuit for controlling the heating power of the heating device according to the output of the micro control unit circuit;

[0016] a CAN communication circuit for communicating with the industrial control board through the CAN bus.

[0017] Preferably, the temperature signal processing circuit comprises:

[0018] a dual-channel filter for filtering the electrical differential signal of the temperature sensor;

[0019] an A / D converter for converting the filtered analog signal into a digital signal.

[0020] Preferably, the dual-channel filter comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, one end of the first resistor is connected to the first signal output end of the temperature sensor, the other end of the first resistor is connected to one end of the first capacitor, one end of the second capacitor and the first input end of the A / D converter; one end of the second resistor is connected to the second signal output end of the temperature sensor, the other end of the second resistor is connected to the other end of the first capacitor, one end of the third capacitor and the second input end of the A / D converter; the other ends of the second capacitor and the third capacitor are grounded.

[0021] Preferably, the load driving circuit comprises a bidirectional thyristor, the bidirectional thyristor is arranged in series in the positive line of the main power supply circuit of the heating device, and the gate of the bidirectional thyristor is connected to the PWM control output end of the micro control unit circuit.

[0022] Preferably, an optocoupler isolator is further arranged between the micro control unit circuit and the gate of the bidirectional thyristor.

[0023] Preferably, the micro control unit circuit adopts an ARM Cortex-M3 core single-chip microcomputer.

[0024] Preferably, the PID operation processing formula is:

[0025]

[0026] wherein, u(k) represents the output of the PID operation at k time, e(k) represents the difference value of the target value and the actual value at k time, k p , k i , k d respectively represent the proportional coefficient, the integral coefficient and the differential coefficient of the PID operation.

[0027] Preferably, the heating device is a heatable copper block.

[0028] Through the above technical scheme, the beneficial effects of the utility model are as follows:

[0029] 1. The multi-channel sealing film temperature control system provided by the application can realize simultaneous sealing film processing of multiple blood collection tubes by configuring multiple heating devices, each of which is independently controlled, greatly improves the efficiency of blood collection tube sealing processing, and guarantees the safety of blood sample storage and transportation.

[0030] 2. The temperature signal processing circuit and the load driving circuit on the temperature control plate are modularly designed, the number of heating devices can be increased or reduced according to actual needs, each heating device can be independently controlled, different scale sample processing needs are met, and multi-channel sealing film temperature control of the blood collection tube is realized.

[0031] 3. The PID algorithm accurately controls the power output of the heating device according to the set target temperature and the real-time monitored temperature data, and ensures the stability and accuracy of the heating temperature. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a system module structure diagram of the utility model.

[0033] Figure 2 It is a system structure block diagram of an embodiment of the utility model.

[0034] Figure 3 It is a circuit principle diagram of a double-channel filter of an embodiment of the utility model.

[0035] Figure 4 It is a circuit principle diagram of an A / D converter of an embodiment of the utility model.

[0036] Figure 5 It is a circuit principle diagram of a load driving circuit of an embodiment of the utility model.

[0037] Figure 6 It is a circuit principle diagram of a micro control unit circuit of an embodiment of the utility model. DETAILED DESCRIPTION

[0038] The foregoing and other technical contents, features and effects of the utility model are described in the following in cooperation with theFigure 1 to the accompanying Figure 6 The detailed description of the embodiments will be clear. The structural content mentioned in the following examples is referred to the drawings.

[0039] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0040] As Figure 1 shown, a multi-channel sealing film temperature control system for blood collection tubes includes:

[0041] A plurality of heating devices are configured to heat seal the aluminum foil film of the blood collection tube. Each heating device is provided with a temperature sensor for detecting the temperature of the corresponding heating device.

[0042] A temperature control board is configured to receive temperature signals from the temperature sensors and control the working state of the corresponding heating device according to the temperature signals.

[0043] An industrial control board is connected to the temperature control board for processing control signals of the temperature control board.

[0044] A touch display screen is connected to the industrial control board for displaying temperature information and receiving user operation instructions.

[0045] In a specific embodiment, the heating device is a heatable copper block. The copper block is heated by internal heating elements to ensure uniformity and stability of heating. The heating element usually uses resistance wire or electric heating tube, which is embedded in the copper block to achieve rapid and efficient heat transfer.

[0046] The temperature control board as the core control unit of the system is used to receive signals from the temperature sensors and adjust the working state of the heating device according to the preset control algorithm. Specifically, as Figure 2 shown, the temperature control board includes:

[0047] A temperature signal processing circuit is used to filter the temperature signals output by the temperature sensor and convert the temperature signals from analog to digital output.

[0048] A micro control unit circuit is used to receive digital output of the temperature signal processing circuit in real time and perform PID operation processing on the received data.

[0049] A load driving circuit is used to control the heating power of the heating device according to the output of the micro control unit circuit.

[0050] A CAN communication circuit is used to communicate with the industrial control board through the CAN bus.

[0051] In the above, in order to ensure the temperature control accuracy of the system, the temperature signal processing circuit of the present embodiment includes:

[0052] a dual-channel filter for filtering an electrical differential signal of the temperature sensor;

[0053] an A / D converter for converting the filtered analog signal into a digital signal.

[0054] Specifically, the dual-channel filter includes a first resistor, a second resistor, a first capacitor, a second capacitor, and a third capacitor. One end of the first resistor is connected to a first signal output end of the temperature sensor, and the other end of the first resistor is connected to one end of the first capacitor, one end of the second capacitor, and a first input end of the A / D converter. One end of the second resistor is connected to a second signal output end of the temperature sensor, and the other end of the second resistor is connected to the other end of the first capacitor, one end of the third capacitor, and a second input end of the A / D converter. The other ends of the second capacitor and the third capacitor are grounded.

[0055] The film sealing temperature control system of the embodiment takes two heating devices as an example, and each heating device is configured with a temperature sensor. Correspondingly, two temperature signal processing circuits and two load driving circuits are provided on the temperature control board, as shown in Figure 3 and 4 The main function of the dual-channel filter is to filter the electrical differential signal of the temperature sensor to suppress common-mode noise and interference. Through filtering, the dual-channel filter can remove high-frequency noise and interference in the temperature signal and retain the low-frequency basic signal, thereby improving the accuracy and stability of temperature measurement. The A / D converter converts the filtered analog temperature signal into a digital signal, so that the temperature signal can be further processed and analyzed by the micro control unit circuit.

[0056] Further, as shown in Figure 5 , the load driving circuit includes a bidirectional thyristor Q1, which is connected in series in the positive line of the main power supply circuit of the heating device, and the gate of the bidirectional thyristor Q1 is connected to the PWM control output end of the micro control unit circuit.

[0057] In specific work, when the PWM control output end of the micro control unit circuit sends a positive pulse signal to the gate of the bidirectional thyristor Q1, the bidirectional thyristor Q1 starts to conduct, and after conduction, the current can flow from the positive line to the heating device through the bidirectional thyristor Q1, so that the heating device starts to work. At the same time, during the working process, by adjusting the duty cycle of the PWM signal, the conduction time of the bidirectional thyristor can be controlled, and thus the average power of the heating device can be controlled to realize accurate power regulation and meet different heating requirements.

[0058] An optocoupler isolator is further provided between the micro control unit circuit and the gate of the bidirectional thyristor. Due to the presence of the optocoupler isolator, electrical isolation is achieved between the micro control unit circuit and the bidirectional thyristor, so as to enhance the stability and safety of system control.

[0059] It should be noted that in the specific design process of the present application, the temperature signal processing circuit and the load driving circuit on the temperature control plate are modularly designed, which greatly improves the flexibility and expandability of the system. For example, multiple load driving circuits can be designed, each controlling a heating device, and through the PWM control output end of the micro control unit circuit, each heating device can be independently power regulated. At the same time, when different temperatures are required for the sealing film processing of multiple blood collection tubes, each temperature signal processing circuit corresponds to the working temperature of a heating device, and through system PID control, each heating device can be set to different temperatures to meet different sealing film requirements.

[0060] As shown in Figure 6 , the micro control unit circuit uses an ARM Cortex-M3 core single chip microcomputer, which has high processing capability and rich peripheral interfaces, and can meet the real-time and accurate control requirements of the multi-channel sealing film temperature control system. The system also uses an advanced PID control algorithm to accurately control the temperature by using an ARM Cortex-M3 core single chip microcomputer MCU. The PID algorithm automatically adjusts the duty cycle of the PWM signal according to the set target temperature and real-time monitored temperature data, thereby accurately controlling the power output of the heating device and ensuring the stability and accuracy of the temperature.

[0061] The PID operation processing formula is:

[0062]

[0063] Where u(k) represents the output of the PID operation at time k, e(k) represents the difference between the target value and the actual value at time k, k p , k i , k d represent the proportional coefficient, integral coefficient and differential coefficient of the PID operation respectively.

[0064] The PID algorithm automatically adjusts the duty cycle of the PWM signal according to the set target temperature and real-time monitored temperature data, thereby accurately controlling the power output of the heating device and ensuring the stability and accuracy of the heating temperature, avoiding the problem of poor sealing film effect caused by excessively high or low heating temperature.

[0065] The CAN communication circuit is a bridge between the temperature control board and the industrial control board, responsible for transmitting the temperature data, control signals and other key information collected by the temperature control board to the industrial control board in real time and accurately. The CAN communication circuit can provide high-speed data transmission capability, ensure the synchronization of information between the temperature control board and the industrial control board, and thus realize the rapid response and control of the heating device, and has the characteristics of strong anti-interference ability and stable data transmission, which can maintain the reliability of communication even in a complex electromagnetic environment.

[0066] The touch display screen can display the temperature information of each heating device in real time, including the current temperature, target temperature, etc., helping users understand the running state of the system. Users can perform various operations such as setting the target temperature and adjusting the system parameters through the touch display screen, and transmit these operation instructions to the industrial control board through the touch display screen to realize intelligent control of the system.

[0067] In summary, the multi-channel sealing temperature control system provided by the present application can realize simultaneous sealing processing of multiple blood collection tubes by configuring multiple heating devices, each of which is independently controlled, greatly improving the efficiency of blood collection tube sealing processing and ensuring the safety of blood sample storage and transportation. The temperature signal processing circuit and the load driving circuit on the temperature control board are designed in a modular manner, and the number of heating devices can be increased or decreased according to actual needs. Each heating device can be independently controlled to meet the sample processing needs of different scales and realize multi-channel sealing temperature control of blood collection tubes. The PID algorithm accurately controls the power output of the heating device according to the set target temperature and real-time monitored temperature data, ensuring the stability and accuracy of the heating temperature.

[0068] The above is a further detailed description of the present application in conjunction with the specific embodiments, which cannot be limited to the specific embodiments of the present application; for the skilled in the art and related technical field, the expansion, operation method and data replacement based on the technical scheme of the present application should be within the protection scope of the present application.

Claims

1. A multi-channel sealing temperature control system for blood collection tubes, characterized in that, The application relates to a temperature control device for a blood collection tube aluminum foil sealing machine. The device comprises: a plurality of heating devices configured to heat seal a blood collection tube aluminum foil, each of which is provided with a temperature sensor for detecting the temperature of the corresponding heating device; a temperature control board configured to receive temperature signals from the temperature sensors and control the working state of the corresponding heating device according to the temperature signals; an industrial control board connected to the temperature control board for processing the control signals of the temperature control board; 2. The temperature-controlled system for sealing and labeling a plurality of blood collection tubes of claim 1, wherein, a touch display screen connected to the industrial control board for displaying temperature information and receiving user operation instructions. The temperature control board comprises: a temperature signal processing circuit for filtering the temperature signals output by the temperature sensors and converting the temperature signals from analog signals to digital signals; a micro control unit circuit for receiving the digital signals output by the temperature signal processing circuit in real time and performing PID operation processing on the received data; a load driving circuit for controlling the heating power of the heating devices according to the output of the micro control unit circuit; 3. The temperature controlled system for sealing and labeling multiple blood collection tubes of claim 2, wherein, a CAN communication circuit for communicating with the industrial control board through a CAN bus. The temperature signal processing circuit comprises: a double-channel filter for filtering the electrical differential signals of the temperature sensors; 4. The temperature-controlled system for sealing a plurality of blood collection tubes according to claim 3, wherein, an A / D converter for converting the filtered analog signals into digital signals.

5. The temperature controlled system for sealing a plurality of blood collection tubes according to claim 2, wherein, The double-channel filter comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, one end of the first resistor is connected to a first signal output end of the temperature sensor, the other end of the first resistor is connected to one end of the first capacitor, one end of the second capacitor and a first input end of the A / D converter; one end of the second resistor is connected to a second signal output end of the temperature sensor, the other end of the second resistor is connected to the other end of the first capacitor, one end of the third capacitor and a second input end of the A / D converter; the other ends of the second capacitor and the third capacitor are grounded.

6. The temperature-controlled system for sealing a plurality of blood collection tubes according to claim 5, wherein, The load driving circuit comprises a bidirectional thyristor, which is arranged in series in a positive line of a main power supply circuit of the heating device, and the gate of the bidirectional thyristor is connected to a PWM control output end of the micro control unit circuit.

7. The temperature control system for the multi-lane sealing of blood collection tubes according to any of claims 2 to 6, characterized in that An optocoupler isolator is further arranged between the micro control unit circuit and the gate of the bidirectional thyristor.

8. The temperature-controlled system for sealing a plurality of blood collection tubes according to claim 1, wherein, The micro control unit circuit adopts an ARM Cortex-M3 core single-chip microcomputer. The heating device is a heatable copper block.

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