An injection solution detection circuit and an injection solution detection device

Abstract

This application relates to the technical field of injection fluid detection, and more particularly to an injection fluid detection circuit and device. It includes: a capacitance sensing module, an adjustable module, and a detection module; the input terminal of the detection module is configured with a target injection channel, and the output terminal of the detection module is connected to the input terminal of the adjustable module; the target injection channel is used to store conductive injection fluid; the sensing terminal of the capacitance sensing module is connected to the output terminal of the adjustable module, and the output terminal of the capacitance sensing module is connected to the input terminal of a main control module. This application obtains the state of the conductive injection fluid by measuring the voltage change through capacitance changes, avoiding misjudgments caused by mechanical wear, pressure fluctuations, and other factors in traditional methods. This improves the detection accuracy and reliability of the high-pressure contrast injection system, thereby effectively enhancing the overall performance of high-pressure contrast technology and the accuracy of medical diagnosis.

Description

Technical Field

[0001] This application relates to the technical field of injection solution detection, and more particularly to an injection solution detection circuit and injection solution detection device. Background Technology

[0002] In the field of medical diagnosis and treatment, high-pressure contrast imaging technology is widely used. It involves injecting a contrast agent into the human body, allowing internal structures to be visualized under X-ray, CT, and other imaging equipment, providing doctors with clear diagnostic images. The high-pressure contrast injection system, as one of the core devices of this technology, primarily functions to inject the contrast agent into blood vessels and other sites within the body at appropriate flow rates and pressures during the imaging process. Accurately detecting the presence of injection fluid within the syringe tubing is crucial in this process, as it relates to the safety, accuracy, and effectiveness of the imaging procedure.

[0003] Currently, methods for detecting injection fluid in high-pressure contrast injection systems mainly include traditional physical detection techniques. These include indirectly determining the presence of injection fluid by detecting pressure changes within the injection tubing using pressure sensors, or inferring the status of the injection fluid by monitoring the position and movement of the syringe piston. However, these existing technologies have certain limitations and problems in practical applications. For example, with pressure sensors, when there is a minor blockage in the injection tubing or the injection fluid flow rate is slow, the pressure change may be very slight, making it difficult for the pressure sensor to accurately capture such subtle changes, potentially leading to misjudgments of the injection fluid's presence. Similarly, relying on monitoring the syringe piston may also fail to reflect the real-time status of the injection fluid within the tubing in a timely and accurate manner due to minor wear and tear on mechanical components, jamming, or delays in the control system.

[0004] In summary, existing technologies for detecting injection solutions in high-pressure contrast imaging systems suffer from insufficient detection accuracy and difficulty in real-time and accurate monitoring of the injection solution's state. This, to some extent, affects the overall performance of high-pressure contrast imaging technology and the reliability of medical diagnosis. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this application provides an injection fluid detection circuit and an injection fluid detection device. By measuring the voltage change through capacitance changes, the state of the conductive injection fluid can be obtained. This avoids misjudgments caused by mechanical wear, pressure fluctuations, and other factors in traditional methods, thereby improving the detection accuracy and reliability of the high-pressure contrast injection system and effectively enhancing the overall performance of high-pressure contrast technology and the accuracy of medical diagnosis.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] In a first aspect, this application provides an injection detection circuit, including: a capacitance sensing module, an adjustable module, and a detection module;

[0008] The input end of the detection module is equipped with a target injection channel, and the output end of the detection module is connected to the input end of the adjustable module. The target injection channel is used to store conductive injection liquid.

[0009] The sensing end of the capacitive sensing module is connected to the output end of the adjustable module, and the output end of the capacitive sensing module is connected to the input end of the main control module.

[0010] In response to the detection module acquiring the state of the conductive injection solution, the adjustable module transmits the capacitance change signal to the capacitance sensing module, so that the capacitance sensing module reports the state of the conductive injection solution to the main control module based on the capacitance change signal.

[0011] Optionally, it may also include: a power supply module;

[0012] The power supply module is equipped with a DC signal source, and the output terminal of the power supply module is connected to the power supply terminal of the capacitive sensing module and the power supply terminal of the main control module.

[0013] Optionally, the detection module includes a conductive spring;

[0014] One end of the conductive spring is embedded in the target through hole of the PCB board, and the input end of the adjustable module is connected through the embedded end of the conductive spring.

[0015] The target injection channel passes through the target through-hole and then through the conductive spring.

[0016] Optionally, the adjustable module includes a first resistor and a second capacitor;

[0017] The first end of the first resistor is connected to the embedded end of the conductive spring, and the second end of the first resistor is connected to the sensing end of the capacitive sensing module.

[0018] The first terminal of the second capacitor is connected to the connection point between the first resistor and the capacitive sensing module, and the second terminal of the second capacitor is grounded.

[0019] Optionally, the capacitive sensing module includes a capacitive sensing chip of model AF223;

[0020] The first terminal of the capacitive sensing chip is connected to the input terminal of the main control module, and the second terminal of the capacitive sensing chip is grounded.

[0021] The third terminal of the capacitive sensing chip is connected to the second terminal of the first resistor and the first terminal of the second capacitor;

[0022] The fourth and sixth terminals of the capacitive sensing chip are grounded, and the fifth terminal of the capacitive sensing chip is connected to the output terminal of the power supply module.

[0023] Optionally, the power supply module includes the DC signal source and the first capacitor;

[0024] The DC signal source is connected to the fifth terminal of the capacitive sensing chip;

[0025] The first end of the first capacitor is connected to the connection point between the DC signal source and the capacitive sensing chip, and the second end of the first capacitor is grounded.

[0026] Optionally, the main control module includes a detection board connector and an MCU, wherein the detection board connector is connected to the MCU;

[0027] The first end of the detection board connector is connected to the DC signal source;

[0028] The second end of the detection board connector is connected to the first end of the capacitive sensing chip.

[0029] The third end of the detection board connector is grounded.

[0030] Secondly, this application provides an injection detection device equipped with the aforementioned injection detection circuit.

[0031] The beneficial effects of this application are as follows: The capacitive sensing module is used to detect the state of the conductive injection fluid within the target injection channel. When the conductive injection fluid is present, it creates a certain capacitance change within the channel. The adjustable module adjusts the transmission of the capacitance change signal according to specific needs, ensuring signal stability and accuracy. The detection module monitors the target injection channel, acquires the injection fluid state information, and transmits the information to the adjustable module. After adjusting the capacitance change signal, the adjustable module transmits the signal to the capacitive sensing module. The capacitive sensing module receives the adjusted capacitance change signal and reports the conductive injection fluid state information to the main control module. In this way, the entire system can detect the presence and state of the injection fluid in real time and accurately, thereby ensuring the monitoring accuracy and safety of the high-pressure contrast injection system and ensuring the reliability and effectiveness of the medical diagnostic process. Attached Figure Description

[0032] Figure 1 This is a module connection diagram of the injection detection circuit provided in the embodiments of this application;

[0033] Figure 2 This is a circuit diagram of the injection detection circuit provided in the embodiments of this application;

[0034] Figure 3This is a schematic diagram of the PCB board of the injection detection circuit provided in the embodiments of this application.

[0035] Figure label:

[0036] R1, first resistor; C1, first capacitor; C2, second capacitor; H1, detection board connector; CN1, conductive spring; U1, capacitive sensing chip. Detailed Implementation

[0037] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0038] The following will clearly and completely describe the concept, specific structure, and resulting technical effects of this application in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this application. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this application can be combined interactively without contradicting each other.

[0039] Reference Figure 1 , Figure 1 This is a module connection diagram of the injection detection circuit provided in the embodiments of this application. Figure 1 Several key modules involved in the detection circuit mentioned in the embodiments of this application are shown, and are described in detail below:

[0040] An injection detection circuit includes: a capacitance sensing module, an adjustable module, and a detection module;

[0041] The detection module has a target injection conduit at its input end, and its output end is connected to the input end of the adjustable module. The target injection conduit is used to store conductive injection solution.

[0042] Specifically, the detection module is used to detect the physical quantity (i.e., whether the conductive injection fluid is present) in the injection tubing and convert it into a corresponding electrical signal output.

[0043] Specifically, the adjustable module adjusts relevant parameters or functions in the system based on the output signal of the detection module to adapt to different working states or requirements. In this embodiment, the sensitivity of the detection is mainly adjusted through parameters.

[0044] Specifically, the target injection channel is a specific injection channel monitored by the detection module, which stores a conductive injection fluid for detection. The conductive injection fluid is a liquid containing conductive ions that flows in the injection channel, and its electrical properties are the basis for the detection module to perform the detection.

[0045] Specifically, the detection module is connected to the target injection line via its input terminal. This target injection line contains a conductive injection fluid, which is detected due to its conductivity. The detection module monitors the conditions within this target injection line and converts the monitored information into electrical signals. These signals are then output from the detection module's output terminal and directly connected to the input terminal of the adjustable module. The adjustable module adjusts and controls the input according to preset parameters, thereby transmitting the processed data to the subsequent capacitive sensing module.

[0046] The sensing end of the capacitive sensing module is connected to the output end of the adjustable module, and the output end of the capacitive sensing module is connected to the input end of the main control module.

[0047] Specifically, the capacitance sensing module uses the principle of capacitance sensing to monitor the presence and flow of the injection fluid in the injection tubing. It can sense changes in capacitance and convert these changes into electrical signals for output.

[0048] Specifically, the sensing end of the capacitive sensing module is connected to the output end of the adjustable module, enabling the adjustable module to adjust and control the operating state of the capacitive sensing module, such as adjusting parameters like sensing sensitivity. The output end of the capacitive sensing module is connected to the input end of the main control module, ensuring that the signal detected by the capacitive sensing module can be acquired by the main control module in a timely manner.

[0049] More specifically, the main control module analyzes and processes these signals to achieve precise control of the entire system. This connection and operating mode enables the entire system to efficiently and accurately monitor the state of the injection fluid within the injection tubing and to perform corresponding control and adjustment based on the detection results.

[0050] More specifically, the working principle of this application is as follows: in response to the detection module acquiring the state of the conductive injection solution, the adjustable module transmits the capacitance change signal to the capacitance sensing module, so that the capacitance sensing module reports the state of the conductive injection solution to the main control module based on the capacitance change signal.

[0051] The state of the conductive injection fluid refers to the state of the conductive injection fluid within the injection tubing, including whether there is injection fluid present and its flow characteristics, which is reflected by capacitance change signals.

[0052] Specifically, after the detection module acquires the status of the conductive injection fluid, the capacitance sensing module responds to this status change. Specifically, the adjustable module transmits a capacitance change signal to the capacitance sensing module based on the information acquired by the detection module. The capacitance sensing module further processes the received capacitance change signal and generates a corresponding voltage signal (in this embodiment, a low level is sent when there is no injection fluid, and a high level is sent when there is injection fluid), reporting the status of the conductive injection fluid to the main control module. This process ensures that the main control module can obtain real-time status information of the conductive injection fluid in the pipeline in a timely and accurate manner, thereby achieving effective monitoring and management of the entire system.

[0053] Furthermore, it also includes: a power supply module;

[0054] The power supply module is equipped with a DC signal source, and the output terminal of the power supply module is connected to the power supply terminal of the capacitive sensing module and the power supply terminal of the main control module.

[0055] Specifically, the power supply module is equipped with a DC signal source, which provides a stable DC power supply to the entire system. Specifically, the output of the power supply module is connected to the power supply terminals of the capacitor sensing module and the main control module, thereby ensuring that these two critical modules receive a stable power supply.

[0056] Furthermore, referring to Figure 2 and Figure 3 , Figure 2 This is a circuit diagram of the injection detection circuit provided in the embodiments of this application. Figure 3 This is a schematic diagram of the PCB board of the injection detection circuit provided in the embodiment of this application, which specifically shows the connection design of the specific circuit components of each of the above modules. The following is a detailed description of each module:

[0057] The detection module includes a conductive spring CN1;

[0058] One end of the conductive spring CN1 is embedded in the target through hole of the PCB board, and the input end of the adjustable module is connected through the embedded end of the conductive spring CN1.

[0059] The target injection channel passes through the target through-hole and then through the conductive spring CN1.

[0060] Among them, the conductive spring CN1 is a key component in the detection module. It has conductivity and elasticity, and its structural design allows it to be connected to the injection tube and circuit board, playing the role of signal transmission and support.

[0061] Among them, the target through hole on the PCB board is a through hole at a specific location on the PCB board, which is used to pass through the target injection channel and install the conductive spring CN1 to achieve mechanical fixation and electrical connection.

[0062] Specifically, the detection module includes a conductive spring CN1, one end of which is embedded in a target through-hole on the PCB board. This design not only achieves a stable connection between the conductive spring CN1 and the PCB board, but also establishes an electrical connection between the embedded end of the conductive spring CN1 and the input end of the adjustable module, thereby effectively transmitting the detection signal to the adjustable module.

[0063] Simultaneously, the target injection channel needs to pass through the target through-hole on the PCB board and be placed within the conductive spring CN1. This ensures the target injection channel remains stable under the elastic support of the conductive spring CN1, while also guaranteeing that when the state of the conductive injection fluid inside the channel changes, the corresponding physical change can be converted into an electrical signal through the conductive spring CN1. These signals are then transmitted to the adjustable module for further processing, enabling real-time monitoring and feedback of the injection fluid state.

[0064] Furthermore, the adjustable module includes a first resistor R1 and a second capacitor C2;

[0065] The first end of the first resistor R1 is connected to the embedded end of the conductive spring CN1, and the second end of the first resistor R1 is connected to the sensing end of the capacitive sensing module.

[0066] The first end of the second capacitor C2 is connected to the connection point between the first resistor R1 and the capacitive sensing module, and the second end of the second capacitor C2 is grounded.

[0067] Specifically, the first resistor R1 is used to limit the current and adjust the signal strength of the circuit. Its two ends are connected to the embedded end of the conductive spring CN1 and the sensing end of the capacitive sensing module. The second capacitor C2 works in conjunction with the first resistor R1 to filter and adjust the stability of the signal. One end of C2 is connected to the connection between the first resistor R1 and the capacitive sensing module, and the other end is grounded.

[0068] Specifically, the first end of the first resistor R1 is connected to the embedded end of the conductive spring CN1, thereby receiving the signal from the detection module. The second end of the first resistor R1 is connected to the sensing end of the capacitive sensing module, transmitting the signal to the capacitive sensing module for further processing. Furthermore, the first end of the second capacitor C2 is connected at the junction between the first resistor R1 and the capacitive sensing module, used for signal filtering and stabilization. The second end of the second capacitor C2 is grounded, ensuring a stable potential reference for the entire circuit, thereby improving the accuracy and reliability of signal transmission.

[0069] More specifically, the first resistor R1 and the second capacitor C2 are also used to adjust the detection sensitivity. The lower the resistance and capacitance values, the higher the detection sensitivity. This is because lower resistance and capacitance values ​​allow the signal to pass through the circuit more quickly, reducing signal attenuation and delay, thereby improving the response capability to small capacitance changes.

[0070] Furthermore, the capacitive sensing module includes a capacitive sensing chip U1 of model AF223;

[0071] The first terminal of the capacitive sensing chip U1 is connected to the input terminal of the main control module, and the second terminal of the capacitive sensing chip U1 is grounded.

[0072] The third terminal of the capacitive sensing chip U1 is connected to the second terminal of the first resistor R1 and the first terminal of the second capacitor C2;

[0073] The fourth and sixth terminals of the capacitive sensing chip U1 are grounded, and the fifth terminal of the capacitive sensing chip U1 is connected to the output terminal of the power supply module.

[0074] Specifically, the core of the capacitive sensing module is the AF223 capacitive sensing chip U1, which plays a crucial role in the circuit by converting capacitance changes into voltage changes.

[0075] The specific connection method is as follows: The first terminal of the capacitive sensing chip U1 is connected to the input terminal of the main control module so that the detected signal can be transmitted to the main control module for further processing. The second terminal of the chip is grounded, which is to provide a stable potential reference point for the circuit and reduce the influence of external interference on the signal. The third terminal of the chip is connected to the second terminal of the first resistor R1 and the first terminal of the second capacitor C2. This design allows the resistor and capacitor to work together to adjust the signal strength and stability, thereby affecting the sensitivity of the entire detection system.

[0076] Furthermore, the fourth and sixth terminals of the capacitive sensing chip U1 are also grounded, further enhancing circuit stability. The fifth terminal of the chip is connected to the output of the power supply module, ensuring that the capacitive sensing chip U1 can obtain a stable operating voltage, thereby guaranteeing its normal operation and accurate signal conversion. Through this carefully designed connection method, the entire system can efficiently detect the state of the conductive liquid in the injection tubing and accurately transmit relevant information to the main control module, achieving precise monitoring of the injection process.

[0077] Furthermore, the power supply module includes the DC signal source and the first capacitor C1;

[0078] The DC signal source is connected to the fifth terminal of the capacitive sensing chip U1;

[0079] The first end of the first capacitor C1 is connected to the connection point between the DC signal source and the capacitive sensing chip U1, and the second end of the first capacitor C1 is grounded.

[0080] Specifically, the power supply module consists of a DC signal source and a first capacitor C1, responsible for providing a stable operating voltage to the capacitive sensing chip U1. The DC signal source is connected to the fifth terminal of the capacitive sensing chip U1 to ensure a stable power supply to the chip. The first terminal of the first capacitor C1 is connected at the junction of the DC signal source and the capacitive sensing chip U1 to filter the power signal and reduce the impact of power fluctuations on the chip's operation. The second terminal of the first capacitor C1 is grounded, which further stabilizes the potential and reduces the impact of external interference on the circuit.

[0081] Through this design, the power supply module not only provides stable power support for the capacitive sensing chip U1, but also improves the stability and reliability of the entire system through filtering and grounding measures, ensuring that the capacitive sensing chip U1 can accurately detect capacitance changes and perform signal conversion.

[0082] Furthermore, the main control module includes a detection board connector H1 and an MCU, wherein the detection board connector H1 is connected to the MCU;

[0083] The first end of the detection board connector H1 is connected to the DC signal source;

[0084] The second end of the detection board connector H1 is connected to the first end of the capacitive sensing chip U1;

[0085] The third terminal of the detection board connector H1 is grounded.

[0086] Specifically, the main control module is the core control unit of the entire system. It consists of a detection board connector H1 and an MCU. The detection board connector H1 is connected to the MCU and is responsible for signal transmission and distribution. Specifically, the first end of the detection board connector H1 is connected to a DC signal source, ensuring that the main control module receives a stable power supply, thus supporting the normal operation of the MCU and other components. The second end of the detection board connector H1 is connected to the first end of the capacitance sensing chip U1, enabling the capacitance sensing chip U1 to transmit the detected signal to the main control module for further processing and analysis.

[0087] Secondly, this application provides an injection detection device equipped with the aforementioned injection detection circuit.

[0088] The above is a detailed description of the preferred embodiments of this application. However, the invention of this application is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An injection solution detection circuit, characterized in that, include: Capacitive sensing module, adjustable module, and detection module; The input end of the detection module is equipped with a target injection channel, and the output end of the detection module is connected to the input end of the adjustable module. The target injection channel is used to store conductive injection liquid. The sensing end of the capacitive sensing module is connected to the output end of the adjustable module, and the output end of the capacitive sensing module is connected to the input end of the main control module. In response to the detection module acquiring the state of the conductive injection solution, the adjustable module transmits the capacitance change signal to the capacitance sensing module, so that the capacitance sensing module reports the state of the conductive injection solution to the main control module based on the capacitance change signal.

2. The injection solution detection circuit according to claim 1, characterized in that, Also includes: Power supply module; The power supply module is equipped with a DC signal source, and the output terminal of the power supply module is connected to the power supply terminal of the capacitive sensing module and the power supply terminal of the main control module.

3. The injection solution detection circuit according to claim 2, characterized in that, The detection module includes a conductive spring; One end of the conductive spring is embedded in the target through hole of the PCB board, and the input end of the adjustable module is connected through the embedded end of the conductive spring. The target injection channel passes through the target through-hole and then through the conductive spring.

4. The injection solution detection circuit according to claim 3, characterized in that, The adjustable module includes a first resistor and a second capacitor; The first end of the first resistor is connected to the embedded end of the conductive spring, and the second end of the first resistor is connected to the sensing end of the capacitive sensing module. The first terminal of the second capacitor is connected to the connection point between the first resistor and the capacitive sensing module, and the second terminal of the second capacitor is grounded.

5. The injection solution detection circuit according to claim 4, characterized in that, The capacitive sensing module includes a capacitive sensing chip of model AF223; The first terminal of the capacitive sensing chip is connected to the input terminal of the main control module, and the second terminal of the capacitive sensing chip is grounded. The third terminal of the capacitive sensing chip is connected to the second terminal of the first resistor and the first terminal of the second capacitor; The fourth and sixth terminals of the capacitive sensing chip are grounded, and the fifth terminal of the capacitive sensing chip is connected to the output terminal of the power supply module.

6. The injection solution detection circuit according to claim 5, characterized in that, The power supply module includes the DC signal source and the first capacitor; The DC signal source is connected to the fifth terminal of the capacitive sensing chip; The first end of the first capacitor is connected to the connection point between the DC signal source and the capacitive sensing chip, and the second end of the first capacitor is grounded.

7. The injection solution detection circuit according to claim 5, characterized in that, The main control module includes a detection board connector and an MCU, wherein the detection board connector is connected to the MCU; The first end of the detection board connector is connected to the DC signal source; The second end of the detection board connector is connected to the first end of the capacitive sensing chip. The third end of the detection board connector is grounded.

8. An injection solution testing device, characterized in that, It is equipped with an injection detection circuit as described in any one of claims 1-7.

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