Sample tube in-situ detection device and sample detection and analysis equipment

Abstract

The utility model discloses a sample tube in-situ detection device and sample detection analysis equipment, relates to the technical field of power electronics, and realizes sample tube in-situ detection which is low in cost, simple in structure and high in adaptability. The sample tube in-situ detection device comprises sample tube in-situ detection circuits which are arranged in one-to-one correspondence with sample tubes in sample detection and analysis equipment; the sample tube in-situ detection circuit comprises an optocoupler, a first resistance circuit and a second resistance circuit, the optocoupler comprises a light emitting module and a light receiving module, and when the sample tube shields a light path between the light emitting module and the light receiving module, an electric signal output by the light receiving module is changed; the light emitting module is connected with a power supply after being connected in series with the first resistance circuit, and the light receiving module is connected with the power supply after being connected in series with the second resistance circuit; the sample tube in-situ detection circuit is provided with an output end, and an output signal of the sample tube in-situ detection circuit is positively correlated with the voltage of the electric signal; and the output end is used for accessing a control unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, and particularly relates to a sample tube in-position detection device and a sample detection and analysis equipment. BACKGROUND

[0002] The sample tube in-position detection technology refers to detecting whether the sample tube is accurately in position in real time through a specific method and device, that is, whether it is placed at the specified position strictly according to the preset requirements. In the medical field, this technology is widely used in various medical detection equipment (such as a coagulation analyzer) to ensure the accurate processing and analysis of samples.

[0003] In the prior art, the sample tube in-position detection is usually realized by using a diffuse reflection sensor. However, the diffuse reflection sensor has the problems of high cost, complex structure and high requirement for the application environment (such as high requirement for the cleanliness of the surface of the sample tube). CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a sample tube in-position detection device and a sample detection and analysis equipment to realize low-cost, simple structure and strong adaptability of the sample tube in-position detection. The specific scheme is as follows:

[0005] The first aspect of the present application provides a sample tube in-position detection device, comprising: a sample tube in-position detection circuit corresponding to each sample tube in the sample detection and analysis equipment;

[0006] The sample tube in-position detection circuit comprises: an optical coupler, a first resistance circuit and a second resistance circuit; the optical coupler comprises a light emitting module and a light receiving module, when the sample tube blocks the light path between the light emitting module and the light receiving module, the electrical signal output by the light receiving module changes; the light emitting module and the first resistance circuit are connected in series and then connected to a power supply, the light receiving module and the second resistance circuit are connected in series and then connected to the power supply; the sample tube in-position detection circuit has an output end, the output signal of which is positively correlated with the voltage of the electrical signal; and the output end is used for connecting a control unit.

[0007] In a possible implementation, the optical coupler is a back-shooting type optical coupler, and the light emitting module and the light receiving module are separately arranged; when the sample tube passes through the light path between the light emitting module and the light receiving module, the light signal is blocked to trigger the change of the electrical signal output by the light receiving module.

[0008] In a possible implementation, the optical coupler is a slot type optical coupler, and the light emitting module and the light receiving module are integrated in a package with an open slot; when the sample tube is inserted into the open slot, the light path is blocked to trigger the change of the electrical signal output by the light receiving module.

[0009] In a possible implementation, the light emitting module is an infrared light emitting diode.

[0010] In a possible implementation, the light receiving module is a photosensitive triode.

[0011] In a possible implementation, the sample tube in-place detection device further comprises a filter circuit corresponding to each sample tube in-place detection circuit, and the filter circuit is connected between the output end of the sample tube in-place detection circuit and the control unit.

[0012] In a possible implementation, the filter circuit is an RC filter circuit.

[0013] The second aspect of the present application provides a sample detection and analysis device, comprising the sample tube in-place detection device of the first aspect or any implementation manner of the first aspect.

[0014] In a possible implementation, the sample detection and analysis device is a coagulation analyzer.

[0015] In a possible implementation, the sample tube in-place detection device of the coagulation analyzer has four sample tube in-place detection circuits.

[0016] Through the above technical solution, the sample tube in-place detection device provided by the present application is based on an optical coupling. When the sample tube blocks the light path between the light emitting module and the light receiving module, the light intensity received by the light receiving module will change significantly, thereby causing the change of the electrical signal output by the light receiving module. The detection method of the optical coupling is dependent on the direct blocking of the light path, rather than the reflected light on the surface of the sample tube as in the diffuse reflection sensor. Therefore, the sample tube in-place detection device is less affected by external factors such as ambient light, oil stains, dust, etc., has high stability, reduces the strict requirement for the cleanliness of the surface of the sample tube, and is suitable for various complex environments. In addition, the sample tube in-place detection device provided by the present application has a simple structure design, and only a small number of components such as optical couplings and resistor circuits are required to realize the function. Not only is it easy to install and maintain, but also greatly reduces the manufacturing cost, and has significant cost-effectiveness. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the original and elements are not necessarily drawn according to the scale.

[0018] Figure 1 A circuit schematic diagram of the sample tube in-place detection device provided by the present application;

[0019] Figure 2Another sample tube in place detection device circuit diagram provided in the present application;

[0020] Figure 3 Another sample tube in place detection device circuit diagram provided in the present application. DETAILED DESCRIPTION

[0021] Sample tube in place detection technology refers to detecting whether the sample tube (a container for containing the sample to be detected) is in the accurate in-place state through specific methods and devices, that is, whether it is placed in the designated position strictly according to the preset requirements. In the medical field, this technology is widely used in various medical detection equipment to ensure the accurate processing and analysis of samples.

[0022] Coagulation analyzer is one of the more common application devices of this technology. Coagulation analyzer is a professional medical detection equipment used in clinical practice to detect and analyze coagulation-related substances in blood samples, so as to obtain coagulation-related index data. In the coagulation analysis process, it is crucial to ensure that the sample tube is accurately in place. If the sample tube in place state is abnormal, such as not placed in place, placed incorrectly or displaced during detection, it will cause the detection result to deviate, and in severe cases, it may even cause a medical accident, affecting the safety and effect of patient diagnosis and treatment.

[0023] In the prior art, sample tube in place detection is mostly realized by using diffuse reflection sensor. Diffuse reflection sensor works based on the principle of diffuse reflection, that is: when the light emitted by the sensor irradiates the surface of the sample tube, the light will diffuse, and part of the light will scatter back at different angles; the sensor captures these reflected lights through the built-in photosensitive element, and when it detects reflected light of sufficient intensity, it determines that the sample tube is in place, and then triggers the subsequent detection process of the instrument.

[0024] However, diffuse reflection sensor has the problems of high cost, complex structure and high requirement for application environment (such as high requirement for the cleanliness of the sample tube surface). In view of this, the embodiments of the present application provide a sample tube in place detection device, which aims to provide a more economical, simple and adaptable alternative.

[0025] Next, a sample tube in place detection device provided by the embodiments of the present application will be described in conjunction with the drawings. Those skilled in the art can know that, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0026] The terms "first", "second", and the like in the description and in the claims of the present application and in the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the present application are capable of functioning in other sequences than the one explicitly described herein. Moreover, the terms "comprise", "have" and any variations thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise, have or are otherwise including a list of elements are not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses.

[0027] The sample tube in-place detection device provided by the embodiments of the present application comprises: a sample tube in-place detection circuit corresponding to each sample tube in a sample detection and analysis device (a device having a sample tube in-place detection requirement, for example, a coagulation analyzer in the medical field), and the topological structures of the sample tube in-place detection circuits are the same. That is to say, assuming that the sample detection and analysis device has n sample tubes, the sample tube in-place detection device comprises n sample tube in-place detection circuits with the same topological structure, and n≥1; the i th sample tube in-place detection circuit (hereinafter referred to as sample tube in-place detection circuit i) is arranged corresponding to the i th sample tube (hereinafter referred to as sample tube i), and is used for detecting whether the sample tube i is in place, i=1, 2, 3, …, n.

[0028] The sample tube in-place detection circuit comprises: an optocoupler, a first resistor circuit, and a second resistor circuit.

[0029] The optocoupler, i.e., the photoelectric coupler, is an electro-optical-electric converter that transmits an electrical signal by using light as a medium, and comprises a light emitting module and a light receiving module. The light emitting module is usually a light emitting diode. The light receiving module is a photosensitive device, including but not limited to a photosensitive diode or a photosensitive triode. The pin of the light emitting module is the input end of the optocoupler, and the pin of the light receiving module is the output end of the optocoupler. When the input end of the optocoupler is applied with an electrical signal and the voltage of the electrical signal exceeds the on-voltage drop of the light emitting module, the light emitting module is turned on and emits light, the light signal generated by the light emitting module is received by the light receiving module and is converted into an electrical signal (i.e., the light receiving module is turned on under light irradiation), so as to realize the conversion of electro-optical-electric. The voltage of the electrical signal output by the light receiving module is positively correlated with the light intensity received by the light receiving module. When an object (for example, the sample tube) blocks the light path between the light emitting module and the light receiving module, the light intensity received by the light receiving module will change significantly, resulting in a corresponding change in the electrical signal output by the light receiving module. Based on this characteristic, the optocoupler can be used to detect the in-place state of the sample tube.

[0030] In the sample tube in position detection circuit, the light emitting module is connected with the first resistance circuit in series and then connected to the power supply, the first resistance circuit is used for current limiting and protecting the light emitting module to ensure its stable operation; the light receiving module is connected with the second resistance circuit in series and then connected to the power supply, the second resistance circuit is used for converting the current signal of the light receiving module into a voltage signal and adjusting the detection sensitivity. The first resistance circuit can be composed of a single resistance or a plurality of resistances combined by a specific connection mode (such as series connection, parallel connection or series-parallel connection); similarly, the second resistance circuit can be composed of a single resistance or a plurality of resistances combined by a specific connection mode (such as series connection, parallel connection or series-parallel connection).

[0031] The sample tube in position detection circuit has an output end, the voltage of the electrical signal output by the output end is positively correlated with the voltage of the electrical signal output by the light receiving module, so as to accurately reflect the change of the light intensity received by the light receiving module; the output end of the sample tube in position detection circuit is used for connecting the I / O (Input / Output) port of the control unit. When selecting the position of the output end of the sample tube in position detection circuit, the overall layout and functional requirements of the circuit should be considered comprehensively. For example, when the second resistance circuit is composed of a single resistance, the first end of the second resistance circuit is connected to the power supply, and the second end of the second resistance circuit is grounded through the light receiving module (when the light receiving module is a photosensitive triode, the second end of the second resistance circuit is connected to the collector of the photosensitive triode, and the emitter of the photosensitive triode is grounded), in order to ensure that the voltage of the electrical signal output by the sample tube in position detection circuit is positively correlated with the voltage of the electrical signal output by the light receiving module, the output end of the sample tube in position detection circuit should be the second end of the second resistance circuit.

[0032] Referring to Figure 1 , Figure 1Taking the number of sample tube in position detection circuit n=4, and the power supply in the sample tube in position detection device is +5V DC power supply, the first resistance circuit and the second resistance circuit are both composed of a single resistance, the first end of the second resistance circuit is connected with +5V DC power supply, the second end of the second resistance circuit is grounded GND through the light receiving module, the first end of the first resistance circuit is connected with +5V DC power supply, and the second end of the first resistance circuit is grounded GND through the light emitting module as an example for illustration. Wherein, the light emitting module, the light receiving module, the first resistance circuit, the second resistance circuit and the output end of the sample tube in position detection circuit 1 in the sample tube in position detection circuit 1 are marked as U1, U2, R1, R2 and Key1 respectively, the light emitting module, the light receiving module, the first resistance circuit, the second resistance circuit and the output end of the sample tube in position detection circuit 2 in the sample tube in position detection circuit 2 are marked as U3, U4, R3, R4 and Key2 respectively, the light emitting module, the light receiving module, the first resistance circuit, the second resistance circuit and the output end of the sample tube in position detection circuit 3 in the sample tube in position detection circuit 3 are marked as U5, U6, R5, R6 and Key3 respectively, and the light emitting module, the light receiving module, the first resistance circuit, the second resistance circuit and the output end of the sample tube in position detection circuit 4 in the sample tube in position detection circuit 4 are marked as U7, U8, R7, R8 and Key4 respectively.

[0033] Next, based on Figure 1 , the working principle of the embodiment of the application is described in detail:

[0034] In the sample tube in position detection circuit 1, when the voltage of the electrical signal applied to the light emitting module U1 exceeds the on-voltage drop of the light emitting module U1, the light emitting module U1 is turned on and emits light; when the sample tube 1 is not in position, an unobstructed light path is formed between the light emitting module U1 and the light receiving module U2, and the light signal generated by the light emitting module U1 is received by the light receiving module U2 and converted into an electrical signal (i.e., the light receiving module U2 is turned on under light irradiation), at this time, the output end Key1 of the sample tube in position detection circuit 1 outputs a low level; when the sample tube 1 is in position, the light path between the light emitting module U1 and the light receiving module U2 is obstructed by the sample tube 1, so that the light signal generated by the light emitting module U1 is refracted through the sample tube 1, at this time, the light signal generated by the light emitting module U1 cannot be received or only a small amount of the light signal can be received by the light receiving module U2 (i.e., the light receiving module U2 is not turned on), and the output end Key1 of the sample tube in position detection circuit 1 outputs a high level. The resistor R1 mainly functions to limit the current flowing through the light emitting module U1, preventing the light emitting module U1 from being damaged by excessive current; at the same time, by adjusting the resistance value of the resistor R1, the light emitting module U1 can be ensured to work under a suitable current, and the stable output of the light signal is ensured. The resistor R2 is used to convert the current signal output by the light receiving module U2 into a voltage signal, facilitating subsequent circuit processing; at the same time, by adjusting the resistance value of the resistor R2, the output signal amplitude of the output end Key1 of the sample tube in position detection circuit 1 can be changed, so as to adjust the detection sensitivity, and ensure that the in-position state of the sample tube 1 can be accurately detected under different light conditions. As can be seen, the sample tube in position detection circuit 1 realizes accurate detection of the in-position state of the sample tube 1 by the light path obstruction principle of the optical coupler, in combination with the resistor R1 and the resistor R2. The output end Key1 of the sample tube in position detection circuit 1 outputs the detection result in the form of a voltage signal, for reading and processing by the control unit, so as to realize real-time monitoring of the in-position state of the sample tube 1.

[0035] Similarly, the sample tube in position detection circuit 2 realizes accurate detection of the in-position state of the sample tube 2 by the light path obstruction principle of the optical coupler, in combination with the resistor R3 and the resistor R4. The output end Key2 of the sample tube in position detection circuit 2 outputs the detection result in the form of a voltage signal, for reading and processing by the control unit, so as to realize real-time monitoring of the in-position state of the sample tube 2.

[0036] The sample tube in position detection circuit 3 realizes accurate detection of the in-position state of the sample tube 3 by the light path obstruction principle of the optical coupler, in combination with the resistor R5 and the resistor R6. The output end Key3 of the sample tube in position detection circuit 3 outputs the detection result in the form of a voltage signal, for reading and processing by the control unit, so as to realize real-time monitoring of the in-position state of the sample tube 3.

[0037] The sample tube in-place detection circuit 4 realizes accurate detection of the in-place state of the sample tube 4 through the light path shielding principle of the optical coupler, in combination with the resistor R7 and the resistor R8. The output end Key4 of the sample tube in-place detection circuit 4 outputs the detection result in the form of a voltage signal, for reading and processing by the control unit, thereby realizing real-time monitoring of the in-place state of the sample tube 4.

[0038] In summary, the sample tube in-place detection device provided in the embodiments of the present application is based on an optical coupler. When the sample tube shields the light path between the light emitting module and the light receiving module in the optical coupler, the light intensity received by the light receiving module will change significantly, resulting in a change in the electrical signal output by the light receiving module, thereby realizing detection of the in-place state of the sample tube. The optical coupler adopts a direct detection method, relying on direct light path shielding rather than reflected light from the surface of an object, and is therefore less susceptible to environmental light, oil stains, dust and other factors, has high stability, reduces the strict requirements for the cleanliness of the surface of the sample tube, and is suitable for various complex environments. In contrast, a diffuse reflection sensor relies on reflected light from the surface of a sample tube for detection. In a complex environment (e.g., with oil stains, dust or color changes on the surface of an object), the intensity of the reflected light can be unstable, resulting in reduced detection reliability. In addition, the sample tube in-place detection device provided in the embodiments of the present application has a simple structure and can realize the function with only a small number of components such as an optical coupler and a resistor circuit, which not only facilitates installation and maintenance but also greatly reduces manufacturing costs, thereby having significant cost benefits.

[0039] In addition, it should be noted that the resistance value of the first resistor circuit is configured according to the driving current required by the light emitting module in the current application environment. Specifically, the resistance value of the first resistor circuit directly affects the current flowing through the light emitting module. The greater the current, the stronger the light intensity generated by the light emitting module. When the detection distance is far, in order to ensure sufficient detection effect, stronger light intensity is required, which means that greater current is required. Therefore, in order to meet this requirement, a first resistor circuit with a smaller resistance value should be selected to provide greater driving current to the light emitting module. The resistance values of the first resistor circuits in the same sample tube in-place detection device can be different.

[0040] The resistance value of the second resistor circuit is configured according to the optimal working current required by the light receiving module in the current application environment, so as to improve the accuracy and reliability of detection. The resistance values of the second resistor circuits in the same sample tube in-place detection device can be different.

[0041] In a possible implementation, based on any of the sample tube in-place detection devices provided above, the light emitting module is preferably an infrared light emitting diode, because the infrared light emitting diode as the light emitting module has at least the following four advantages:

[0042] 1) High efficiency and low power consumption: Infrared light-emitting diodes can efficiently generate infrared signals with lower energy consumption, which helps to reduce overall energy consumption and prolong the service life of the device;

[0043] 2) Fast response: Infrared light-emitting diodes have extremely short response times, which can quickly turn on or off, which is crucial for real-time detection of sample tube in-place status, ensuring that the system can respond immediately and make appropriate processing;

[0044] 3) Non-interference: Infrared signals are not easily disturbed by visible light or other electromagnetic waves, and can be transmitted stably in complex environments, improving the accuracy and reliability of detection;

[0045] 4) Easy to integrate: Infrared light-emitting diodes are small in size and easy to integrate with other electronic components, making it easy to achieve efficient layout in compact detection devices.

[0046] In one possible implementation, based on any of the above-provided sample tube in-place detection devices, the light receiving module is preferably a phototransistor, because the phototransistor as a light receiving module has at least the following four advantages:

[0047] 1) High sensitivity: Phototransistors are extremely sensitive to light, even weak light can trigger their response, which is particularly important for detecting weak infrared signals, ensuring that the sample tube in place or out of the light path can be accurately identified;

[0048] 2) Low noise: Phototransistors produce very low noise when converting optical signals to electrical signals, which helps improve signal quality and reduce false positives;

[0049] 3) Good stability: Phototransistors have good stability and can maintain consistent performance under different temperature and light conditions, ensuring the reliability of the detection results;

[0050] 4) Signal amplification function: Phototransistors not only can receive light signals, but also can amplify the signals to a certain extent, which is particularly advantageous for detection scenarios where light attenuation is large, further improving the accuracy of detection.

[0051] In a possible implementation, based on any of the sample tube in-place detection devices provided above, the control unit can be the existing control unit of the sample detection and analysis device itself, without the need for additional configuration. This design has significant advantages. First, from the cost perspective, additional configuration of the control unit often means the need to invest more funds to purchase hardware equipment, and also involves a series of costs such as installation and debugging of the equipment. Directly using the existing control unit of the sample detection and analysis device avoids these additional expenses, greatly saving costs. Second, from the perspective of resource utilization, the control unit of the sample detection and analysis device itself has certain computing and processing capabilities, and can complete the original detection and analysis control tasks while also considering the control function of the sample tube in-place detection, thereby maximizing the use of resources and avoiding the waste of resources.

[0052] To accurately determine the in-place state of the sample tube, the control unit generally includes a signal processing unit and a control logic unit, which cooperate with each other to accurately detect and determine the in-place state of the sample tube. The signal processing unit is responsible for receiving and processing the electrical signal output by the sample tube in-place detection circuit, and extracts useful information through steps such as filtering, amplification, and comparison. The control logic unit sets reasonable determination conditions to trigger corresponding actions according to the processed signal state. For example, when it is determined that the sample tube is not in place, the control logic unit triggers an alarm action. The alarm action can take various forms, such as a sound alarm that attracts the attention of the operator by emitting a sharp alarm sound, or a light alarm that prompts the operator by flashing a light of a specific color. The control unit can also communicate with the upper computer system to send alarm information to the monitoring terminal of the operator in a timely manner, so that the operator can take appropriate measures in a timely manner to ensure the smooth progress of sample detection and analysis.

[0053] In a possible implementation, the control unit is, for example, an MCU (Microcontroller Unit), but is not limited thereto.

[0054] In a possible implementation, based on any of the sample tube in-place detection devices provided above, the optocoupler is a back-to-back optocoupler, and the light emitting module and the light receiving module are separately arranged. When the sample tube passes through the light path between the light emitting module and the light receiving module, the sample tube will block the light signal to trigger a change in the electrical signal output by the light receiving module.

[0055] Alternatively, based on any one of the above sample tube in place detection devices, the optical coupler can also be a slot type optical coupler. The core of the slot type optical coupler is the open slot design inside the package. The open slot is usually linear or U-shaped, which is used to guide light and form a light path. The light emitting module and the light receiving module are integrated in the package with the open slot. When the sample tube is inserted into the open slot, it will block the light path to trigger the change of the electrical signal output by the light receiving module.

[0056] In one possible implementation, referring to Figure 2 The sample tube in place detection device provided by any one of the above embodiments further includes a filter circuit corresponding to each sample tube in place detection circuit. The filter circuit is connected between the output end of the sample tube in place detection circuit and the I / O port of the control unit. The filter circuit is used to reduce noise and interference in the signal, improve the stability and reliability of the signal, and ensure the effective operation of the control unit in various application environments. Figure 2 Still taking the number n of sample tube in place detection circuits as an example, the filter circuits corresponding to the sample tube in place detection circuit 1, the sample tube in place detection circuit 2, the sample tube in place detection circuit 3, and the sample tube in place detection circuit 4 are respectively referred to as the filter circuit 1, the filter circuit 2, the filter circuit 3, and the filter circuit 4.

[0057] According to different frequency response characteristics, the filter circuit is mainly divided into a low-pass filter circuit and a high-pass filter circuit. The design purpose of the low-pass filter circuit is to allow low-frequency signals to pass smoothly while effectively attenuating or preventing high-frequency signals from passing. The high-pass filter circuit (HPF) focuses on allowing high-frequency signals to pass while attenuating or blocking low-frequency signals. In use, the filter circuit can be reasonably selected according to actual needs. For example, the sample detection and analysis equipment is a coagulation analyzer, and the coagulation analyzer is applied in a low-frequency environment, so a low-pass filter circuit is selected.

[0058] In one possible implementation, the filter circuit in the sample tube in place detection device can adopt an RC filter circuit (resistor-capacitor filter circuit), which has many advantages such as simple structure, low cost, and strong anti-interference ability.

[0059] The RC filter circuit is composed of two basic elements, namely, a resistor (R) and a capacitor (C). The working principle of the RC filter circuit is based on the different response characteristics of resistance and capacitance to current and voltage: the capacitor has a small impedance to high-frequency signals and can short-circuit high-frequency components to the ground, while the resistor limits the speed of charge flow and controls the transmission of signals. Therefore, the RC filter circuit can adjust and filter the frequency of the signal.

[0060] According to the different frequency response characteristics, the RC filter circuit is mainly divided into RC low-pass filter circuit and RC high-pass filter circuit. In the RC low-pass filter circuit, the signal first passes through the resistor (R), and then passes through the capacitor (C) to the ground. This configuration allows low-frequency signals to pass through while attenuating high-frequency signals. In the RC high-pass filter circuit, the signal first passes through the capacitor (C), and then passes through the resistor (R) to the ground. This configuration allows high-frequency signals to pass through while attenuating low-frequency signals. In use, the RC filter circuit can be reasonably selected according to actual needs.

[0061] Figure 3 Taking the number n of the sample tube in-place detection circuit as an example (the sample tube in-place detection circuits 1~4 are omitted and not shown), and assuming that the control unit is an MCU, and each filter circuit is an RC low-pass filter circuit, then: the RC low-pass filter circuit corresponding to the sample tube in-place detection circuit 1 is connected between the output end Key1 of the sample tube in-place detection circuit 1 and one I / O port of the MCU, and is composed of a resistor R9 and a capacitor C1; the RC low-pass filter circuit corresponding to the sample tube in-place detection circuit 2 is connected between the output end Key2 of the sample tube in-place detection circuit 2 and another I / O port of the MCU, and is composed of a resistor R10 and a capacitor C2; the RC low-pass filter circuit corresponding to the sample tube in-place detection circuit 3 is connected between the output end Key3 of the sample tube in-place detection circuit 3 and another I / O port of the MCU, and is composed of a resistor R11 and a capacitor C3; and the RC low-pass filter circuit corresponding to the sample tube in-place detection circuit 4 is connected between the output end Key4 of the sample tube in-place detection circuit 4 and another I / O port of the MCU, and is composed of a resistor R12 and a capacitor C4.

[0062] In addition, another embodiment of the present application provides a sample detection and analysis device, which comprises the sample tube in-place detection device provided by any of the above embodiments. The sample detection and analysis device can realize low-cost, simple structure and strong adaptability of sample tube in-place detection, on the basis of which, the sample detection and analysis device can smoothly carry out subsequent sample analysis work, and provide accurate and reliable sample analysis data for researchers, medical staff and industrial producers, and help to promote various work efficiently and accurately.

[0063] In a possible implementation, the sample detection and analysis device is a coagulation analyzer. The coagulation analyzer can realize low-cost, simple structure and strong adaptability of sample tube in-place detection, on the basis of which, the coagulation analyzer can more smoothly carry out subsequent coagulation sample analysis work, and provide fast and accurate coagulation detection data for clinicians, and help disease diagnosis and treatment decision-making, and escort the health of patients.

[0064] In a possible implementation, the coagulation analyzer has four sample tubes, and the coagulation analyzer has four sample tube in-place detection circuits in the sample tube in-place detection device.

[0065] The various embodiments described in this specification are presented by way of example, and each embodiment describes a specific feature or combination of features that can be included in one or more embodiments. Each embodiment is intended to cover the features described in that embodiment, and any element or combination of elements in any of the embodiments can be used in combination with elements or combinations of elements of any of the other embodiments. The embodiments described herein are not mutually exclusive, and any number of embodiments described herein can be combined together. The various embodiments described in this specification are presented by way of example, and each embodiment describes a specific feature or combination of features that can be included in one or more embodiments. Each embodiment is intended to cover the features described in that embodiment, and any element or combination of elements in any of the embodiments can be used in combination with elements or combinations of elements of any of the other embodiments. The embodiments described herein are not mutually exclusive, and any number of embodiments described herein can be combined together.

[0066] The above description presents the disclosed embodiments in sufficient detail to enable one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sample tube in-place detection device, characterized by, The application relates to a sample tube in-place detection device for a sample detection and analysis device. The sample tube in-place detection circuit comprises a photocoupler, a first resistance circuit and a second resistance circuit; the photocoupler comprises a light emitting module and a light receiving module, when the sample tube blocks the light path between the light emitting module and the light receiving module, the electric signal output by the light receiving module changes; the light emitting module is connected with the first resistance circuit in series and then connected with a power supply, the light receiving module is connected with the second resistance circuit in series and then connected with the power supply; the sample tube in-place detection circuit has an output end, the voltage of the output signal of the output end is positively correlated with the voltage of the electric signal; and the output end is used for connecting with a control unit. The photocoupler is a back-shooting type photocoupler, the light emitting module and the light receiving module are separately arranged; when the sample tube passes through the light path between the light emitting module and the light receiving module, the light signal is blocked to trigger the change of the electric signal output by the light receiving module.

2. The sample tube-in-place detection apparatus according to claim 1, characterized by The photocoupler is a slot type photocoupler, the light emitting module and the light receiving module are integrated in a package with an open slot; when the sample tube is inserted into the open slot, the light path is blocked to trigger the change of the electric signal output by the light receiving module.

3. The sample tube-in-place detection apparatus according to claim 1, characterized by The light emitting module is an infrared light emitting diode.

4. The sample tube-in-place detection apparatus according to claim 1, characterized by The light receiving module is a photosensitive triode.

5. The sample tube-in-place detection apparatus according to claim 1, characterized by The sample tube in-place detection device further comprises a filter circuit corresponding to each sample tube in-place detection circuit, the filter circuit is connected between the output end of the sample tube in-place detection circuit and the control unit.

6. The sample tube-in-place detection apparatus according to any one of claims 1 to 5, characterized by The filter circuit is an RC filter circuit.

7. The sample tube-in-place detection apparatus according to claim 6, characterized by The application relates to a sample tube in-place detection device.

8. A sample detection analysis apparatus, characterized by, The sample detection and analysis device is a blood coagulation analyzer. The sample tube in-place detection device has four sample tube in-place detection circuits.

9. The sample detection analysis apparatus according to claim 8, characterized by, ​ 10. The sample detection analysis apparatus according to claim 9, characterized by, ​

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