CN113893059A - Needleless injection device and liquid medicine detection device thereof - Google Patents
Needleless injection device and liquid medicine detection device thereof Download PDFInfo
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- CN113893059A CN113893059A CN202111063976.XA CN202111063976A CN113893059A CN 113893059 A CN113893059 A CN 113893059A CN 202111063976 A CN202111063976 A CN 202111063976A CN 113893059 A CN113893059 A CN 113893059A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
Abstract
The invention relates to a needleless injection device and a liquid medicine detection device thereof, wherein the needleless injection device comprises a liquid storage bin, the liquid medicine detection device is arranged in the liquid storage bin, and the liquid medicine detection device comprises an oily liquid medicine detection unit which is arranged in the liquid storage bin and is used for detecting whether oily liquid medicine exists in the liquid storage bin; the aqueous liquid medicine detection unit is arranged in the liquid storage bin and is used for detecting whether aqueous liquid medicine exists in the liquid storage bin; and the signal processing unit is connected with the output end of the oily liquid medicine detection unit and the output end of the aqueous liquid medicine detection unit, and is used for identifying the oily liquid medicine or the aqueous liquid medicine and identifying that liquid medicine exists when aqueous liquid medicine or oily liquid medicine exists. The scheme realizes the rapid and accurate detection of the state of the liquid medicine stock in the liquid medicine injection process, and improves the liquid medicine injection efficiency and effectiveness.
Description
Technical Field
The invention relates to the technical field of automatic control. In particular, the invention relates to a needleless injection device and a liquid medicine detection device thereof.
Background
With the continuous development of the large-scale breeding industry, the number of livestock in the colony house area (such as pig farm, cattle farm, etc.) for livestock raising is increasing. In the process of raising, in order to improve the breeding efficiency, disease transmission among livestock in the colony house area needs to be reduced as much as possible. The staff in the culture area can choose to vaccinate the livestock in the set time period, thereby effectively reducing the risk of the livestock suffering from diseases. Due to the large number of the population in the colony area, if the conventional vaccination mode is adopted, namely the same needle is adopted to carry out vaccine injection on a large number of populations, the great biological safety risk is inevitably brought, and if each livestock adopts disposable injection materials, a large number of needles are required to be consumed, and the like. In order to effectively reduce the risk and the use cost of a needle, the needle-free injection technology is generally adopted at present, and the medicine is pressed into the skin through a super-strong special spring to form an extremely fine liquid beam. The needleless injection device adopted in the needle-free injection technology can realize one-time medicine taking and multiple injections, thereby effectively improving the injection efficiency and reducing the risk of infecting diseases.
In the current needleless injection device, the liquid medicine in the vaccine bottle can be introduced into an injection liquid storage bin (liquid medicine bin) through a liquid conveying pipe (or a liquid medicine pipe) inside the device. In actual operation, if the stock of the liquid medicine in the liquid medicine injection cabin cannot be detected in time, the phenomenon of idle injection of the needleless injection equipment can be caused, namely, livestock without vaccine injection is determined to be injected, so that partial livestock are missed to inject the vaccine, and potential safety hazards are brought to the immunity of the whole population. In addition, the existing vaccine has oily liquid medicine and aqueous liquid medicine, and the detection of the stock of the liquid medicine is also difficult due to the two liquid medicines with different properties.
Therefore, how to realize the rapid and accurate detection of the state of the liquid medicine storage in the liquid medicine injection process is very important for preventing the occurrence of the phenomenon of 'empty needle'.
Disclosure of Invention
According to the scheme for detecting the liquid medicine in the liquid storage bin of the needleless injection device, the oily liquid medicine detection unit is used for detecting whether the oily liquid medicine exists or not, and the aqueous liquid medicine detection unit is used for detecting whether the aqueous liquid medicine exists or not in the infusion tube, so that the signal processing unit can output the final detection result according to the two detection units, and the accurate detection of whether the liquid medicine exists or not in the liquid storage bin is realized.
To solve at least the above technical problems, in a first aspect, the present invention provides a liquid medicine detecting device for a needle-free injection apparatus including a reservoir including: the oily liquid medicine detection unit is arranged in the liquid storage bin and is used for detecting whether oily liquid medicine exists in the liquid storage bin; the aqueous liquid medicine detection unit is arranged in the liquid storage bin and is used for detecting whether aqueous liquid medicine exists in the liquid storage bin; and the signal processing unit is connected with the output end of the oily liquid medicine detection unit and the output end of the aqueous liquid medicine detection unit, and is used for identifying the oily liquid medicine or the aqueous liquid medicine and identifying that liquid medicine exists when aqueous liquid medicine or oily liquid medicine exists.
In one embodiment, the aqueous liquid medicine detection unit includes a capacitance detection circuit, and the capacitance detection circuit includes at least one capacitance sensing module, and is configured to determine whether an aqueous liquid medicine exists in the liquid storage bin according to a sensed capacitance value sensed by the capacitance sensing module.
In one embodiment, the capacitive sensing module comprises a metal sheet or a metal coil.
In one embodiment, the oily liquid medicine detection unit includes a photoelectric detection circuit, the photoelectric detection circuit includes a transmitting module, a receiving module and a photoelectric detection module, an input end of the photoelectric detection module is connected with an output end of the receiving module, and an output end of the photoelectric detection module is an output end of the oily liquid medicine detection unit, and is configured to determine whether oily liquid medicine exists in the liquid storage bin according to a signal received by the receiving module.
In one embodiment, the photoelectric detection module comprises a comparator, one input end of the comparator is connected with the receiving module, and the other input end of the comparator is used for inputting a reference value, so as to judge whether the oily liquid medicine exists in the liquid storage bin according to the magnitude relation between the signal received by the receiving module and the reference value.
In one embodiment, the emission module comprises a light emitting diode for providing a source of luminescent light; the receiving module comprises a photosensitive receiving tube and is used for receiving the optical signal emitted by the light-emitting source and converting the optical signal into an electric signal.
In one embodiment, the transmitting module and the receiving module adopt infrared geminate transistors, the transmitting module is an infrared transmitting tube, and the receiving module is a phototriode.
In one embodiment, the signal processing unit includes a logic or gate circuit, a first input terminal of the logic or gate circuit is connected to the output terminal of the capacitance detection circuit, and a second input terminal of the logic or gate circuit is connected to the output terminal of the photodetection circuit, and is configured to perform a logical or operation on the level signal output by the capacitance detection circuit and the level signal output by the photodetection circuit to output a level signal indicating a medical fluid state.
In one embodiment, the liquid medicine detection device further comprises a power supply unit, and the power supply unit is connected with the oily liquid medicine detection unit, the aqueous liquid medicine detection unit and the signal processing unit and is used for providing a power supply.
In a second aspect, the invention further provides a needleless injection device comprising a reservoir in which the liquid medicine detection device described in the embodiments of the first aspect is disposed.
According to the invention, the liquid medicine detection device is arranged in the liquid storage bin, and the oily liquid medicine detection unit and the aqueous liquid medicine detection unit are used for respectively detecting the oily liquid medicine and the aqueous liquid medicine in the liquid storage bin, so that the effective detection of the oily liquid medicine and the aqueous liquid medicine in the infusion tube is realized, and therefore, a worker can timely obtain liquid medicine information, so that the liquid medicine in the liquid storage bin can be timely supplemented, and the effectiveness of the liquid medicine injection process is improved. Meanwhile, due to the arrangement of the oily liquid medicine detection unit and the aqueous liquid medicine detection unit, the oily liquid medicine and the aqueous liquid medicine can be accurately identified, so that the detection device can give consideration to the detection of various liquid medicines, and the accuracy of the detection process is effectively improved.
Furthermore, the combination of the capacitance sensing module and the photoelectric transmitting and receiving module is arranged in the liquid storage bin to respectively detect the oily liquid medicine and the aqueous liquid medicine, so that the volume of the detection device is effectively reduced, and the detection device is convenient to install in small equipment such as needleless injection equipment. And can realize the contactless detection to the liquid medicine through electric capacity detection mode and photoelectric detection mode, for example can set up the detecting element who corresponds on the liquid medicine pipe to effectively reduce the pollution to the liquid medicine and to the damage of corresponding device, prolonged detection device's life.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 is a schematic diagram schematically illustrating an exemplary scenario of a medical fluid detection scheme for a needleless injection device in which the present invention is applied;
fig. 2 is a schematic view schematically showing a liquid medicine detection device for a needleless injection apparatus according to an embodiment of the present invention;
fig. 3 is a schematic view schematically showing an aqueous liquid medicine detection unit according to an embodiment of the present invention;
fig. 4 is a diagram schematically showing the form of the components of a transmitting module and a receiving module according to an embodiment of the present invention;
fig. 5 is a schematic view schematically showing an oily liquid medicine detection unit according to an embodiment of the present invention;
fig. 6 is a schematic diagram schematically illustrating a signal processing unit according to an embodiment of the present invention;
fig. 7 is a schematic view schematically showing a housing of the liquid medicine detection device according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, a capacitive detection mode and a photoelectric detection mode exist in the market mainly for detecting whether liquid medicine exists or not, but both the two modes are used for detecting single liquid medicine, and in practice, vaccine liquid medicine contains water-based transparent vaccine and oil-based emulsion vaccine (hereinafter referred to as water-based liquid medicine and oil-based liquid medicine), and the detection of two different types of vaccines cannot be realized by using the current detection mode. In view of this, it is necessary to design a detection method capable of indiscriminately identifying the existence of the two types of liquid medicines in the liquid storage bins, so as to monitor the liquid medicine state in the liquid storage bins of the needleless injection device in time, so as to avoid the occurrence of the situation of ineffective injection of the vaccine during injection.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Fig. 1 is a schematic diagram schematically illustrating an exemplary scenario 10 in which the present medical fluid detection scheme for a needleless injection device is applied. In the context of the present invention, the foregoing scenario may include various types of liquid storage chambers 100 (liquid medicine chambers) of the needleless injection device, for example, a liquid medicine tube connecting the liquid storage chamber and the nozzle in the liquid storage chamber 100 of the needleless injection device, and may also be used in an intravenous infusion dropper. Based on this, it is understood that fig. 1 shows this scenario as a needle-free injection device for exemplary purposes only, and therefore the solution of the present invention will be described in detail mainly with respect to the detection of a remaining medical fluid from a reservoir in a needle-free injection device.
As shown in fig. 1, the operating principle of the needleless injection device in the present embodiment is to generate pressure by a pressure device inside the needleless injection device, so as to push the liquid medicine in the liquid storage chamber 100 inside the needleless injection device through the micro-hole of the head by the pressure, thereby forming a very fine liquid medicine column. By utilizing the pressure jet principle, the liquid medicine is injected to the subcutaneous part instantly, thereby completing the non-contact injection process of the liquid medicine once. In one application scenario, the needleless injection device can adopt a bottle hanging type medicine suction manner to introduce the liquid medicine in the external vaccine bottle 300 into the liquid storage bin 100 of the needleless injection device through the infusion tube 400. When the needleless injection device is used for injecting vaccines into pigs, continuous injection can be performed by pressing the injection button by a worker, so that the injection of livestock in a large-scale farm is realized. For example, the aforementioned needle-free injection device can realize 1ml or 2ml two-gear needle-free injection.
Because the staff can not pay attention to the residual amount of the liquid medicine in the liquid storage bin of the needleless injection device in real time when injecting, some liquid storage bins are not transparent structures, and the residual amount of the liquid medicine can not be observed from the outside. If the liquid medicine is not replenished in time after multiple injections, it may lead to a "needle empty" situation, i.e. a part of the animals in the pen that have not completed the injection of the liquid medicine are considered to have been vaccinated. Consequently, through detecting the liquid medicine in the stock solution storehouse, can effectively monitor the liquid medicine surplus to can in time remind the staff to supply, for example can change outside vaccine bottle.
In order to accurately detect the liquid level in the infusion tube, the liquid medicine detection device 200 is arranged in the liquid storage bin 100 of the needleless injection device, so that the oily liquid medicine and the aqueous liquid medicine can be accurately identified, and a worker can be timely reminded of supplementing the liquid medicine. The presence or absence of the oily liquid medicine can be detected by the oily liquid medicine detection unit provided in the liquid medicine detection device 200, and the presence or absence of the aqueous liquid medicine can be detected by the aqueous liquid medicine detection unit. Whether the liquid medicine exists in the liquid storage bin can be comprehensively obtained through processing the two detection results, and therefore the liquid medicine state in the liquid storage bin can be accurately monitored. In one implementation scenario, the liquid medicine detection device 200 may be disposed on a pipeline connecting the nozzle of the needleless injection device and the reservoir, or disposed at another position in the reservoir, for example, and may be adaptively disposed as required by those skilled in the art.
While the invention has been briefly described above in connection with fig. 1, it is to be understood that the above description is intended by way of example, and not by way of limitation, and that changes may be made to the scenario of fig. 1 by those skilled in the art in light of the teachings of the present invention without departing from the spirit and spirit of the present invention. For example, the medical fluid detection device 200 may be applied to monitoring the remaining amount of medical fluid during intravenous injection. It can be understood that the needleless injection device is particularly suitable for injecting vaccines of piglets, cows, sheep and the like before separation, and is also suitable for various small animals, such as dogs, cats, rabbits and the like, and workers only need to grab the animals, align the injection part with the protruding needleless injection head, and slightly press the injection button to complete injection.
Fig. 2 is a schematic view schematically showing a liquid medicine detection device for a needleless injection apparatus according to an embodiment of the present invention. It will be appreciated that the apparatus shown in figure 2 may be implemented in the exemplary scenario shown in figure 1, and therefore what is described in relation to figure 1 is equally applicable to figure 2.
As shown in fig. 2, the oily liquid medicine detecting unit in the liquid medicine detecting device 200 may be disposed in the liquid storage chamber to detect whether the oily liquid medicine exists in the liquid storage chamber. In one implementation scenario, the oily liquid medicine is mainly oily emulsion, and can be identified in various ways, for example, by using the liquid conductivity property, and directly contacting the liquid medicine with a corresponding probe, or by using a weighing method, and the remaining condition of the liquid medicine is determined according to the weight of the liquid medicine in the liquid storage bin. And an inductive capacitor can be used for detecting the oily liquid medicine on the corresponding pipeline in the liquid storage bin in a capacitive detection mode.
In the aqueous chemical detection unit of the chemical detection device 200, the aqueous chemical detection unit is disposed in the liquid storage compartment to detect whether an aqueous chemical exists in the liquid storage compartment. The aqueous chemical solution detection means may detect the remaining chemical solution by, for example, a capacitive detection method.
The liquid medicine detection device 200 is further provided with a signal processing unit, and the signal processing unit can be connected with the output end of the oily liquid medicine detection unit and the output end of the aqueous liquid medicine detection unit, so as to identify the oily liquid medicine and the aqueous liquid medicine, and facilitate detection of the remaining state of the liquid medicine in the liquid storage bin. In an application scenario, the signal processing unit may be implemented by a control circuit, and the control circuit is disposed on the circuit board 203, so as to implement connection with the oily liquid medicine detection unit and the aqueous liquid medicine detection unit. Further, in order to realize power supply to the signal processing unit and the like on the circuit board, a power supply cable 205 is also provided.
Furthermore, in order to remind the working personnel of the liquid medicine state in the liquid storage bin in time, an alarm unit can be arranged to alarm when no liquid medicine is detected. For example, the alarm unit may be an indicator light, or may be a buzzer, so as to remind the user through light or sound.
The composition of the liquid level detecting apparatus of the present invention is briefly described above with reference to fig. 2, and the composition of each part will be described in detail below.
Fig. 3 is a schematic view schematically showing an aqueous liquid medicine detection unit according to an embodiment of the present invention. It will be appreciated that the circuit shown in fig. 3 may be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 also applies to fig. 3.
In an application scenario, the aqueous liquid medicine detection device may include a capacitance detection circuit 202, where the capacitance detection circuit 202 includes at least one capacitance sensing module, and the capacitance sensing module is attached to the pipeline 201 connecting the spray head of the needleless injection device and the liquid storage bin, so as to determine whether the aqueous liquid medicine exists in the infusion tube according to a capacitance variation sensed by the capacitance sensing module. For example, the capacitance sensing module can adopt an induction plate, and the induction plate and the pipeline are tightly attached to form a capacitor, so that the capacitance value can be changed when liquid flows through the infusion tube, and the monitoring of the liquid level in the infusion tube is realized.
The aforementioned capacitance detection circuit 202 may include a capacitance detection chip and at least one capacitance sensing module. The input end of the capacitor detection chip is connected with the capacitor sensing module, and the output end of the capacitor detection chip can be used as the output end of the aqueous liquid medicine detection unit, so that whether aqueous liquid medicine exists in the liquid storage bin can be judged according to the sensing capacitor value sensed by the capacitor sensing module. In one application scenario, as shown in fig. 3, pin 3 of the capacitance detecting chip U1 is a capacitance input pin, wherein the capacitor C4 is a capacitance sensitivity adjusting device, when the capacitor C4 is increased, the capacitance detecting sensitivity is decreased, and pin 1 on the capacitance detecting chip U1 is a status output pin. In the default state, the pin output level is low, and when the capacitance on the input pin 1 is large enough, the output level jumps to high. Further, the capacitance sensing module includes conductive materials such as metal sheets or metal coils. For example, the capacitance sensing module in the present scheme may be in the form of a copper sheet or a combination of a plurality of copper sheets.
Fig. 4 is a schematic view schematically showing the composition of a transmitting module and a receiving module according to an embodiment of the present invention, and fig. 5 is a schematic view schematically showing an oily liquid medicine detection unit according to an embodiment of the present invention. It will be appreciated that the circuits shown in fig. 4 and 5 may be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 applies equally to fig. 4 and 5.
In an application scenario, the oily liquid medicine detection unit may include a photoelectric detection circuit 204, the photoelectric detection circuit 204 may include a transmitting module and a receiving module, the transmitting module may be a light source, and the receiving module may be a photosensitive device, so as to sense an optical signal emitted by the transmitting module. The transmitting module and the receiving module are arranged on two sides of the pipeline in the liquid storage bin, and whether oily liquid medicine exists in the pipeline or not can be detected according to the optical signal received by the receiving module, so that whether liquid medicine exists in the liquid storage bin or not is judged. In an application scene, when liquid medicine flows through and no liquid medicine flows through the pipeline connecting the spray head and the liquid storage bin, the light intensity received by the receiving module is different, and the liquid medicine in the liquid storage bin can be detected according to the light intensity received by the receiving module.
The photoelectric detection circuit comprises a transmitting module, a receiving module and a photoelectric detection module. The input end of the photoelectric detection module is connected with the receiving module, and the output end of the photoelectric detection module is used as the output end of the oily liquid medicine detection unit, so that whether oily liquid medicine exists in the liquid storage bin or not can be judged according to the signal received by the receiving module. In one application scenario, as shown in fig. 4, the emitting module includes a light emitting diode for providing a light source on one side of the pipeline. The receiving module comprises a photosensitive receiving tube so as to receive the optical signal on the other side of the pipeline and convert the optical signal into an electric signal.
Further, the transmitting module and the receiving module may adopt infrared pair tubes, that is, the transmitting module may adopt an infrared transmitting tube, and the receiving module may adopt a phototriode. In one application scenario, as shown in fig. 4, the emitting module of the infrared pair of transistors G1 employs a light emitting diode, and the receiving module employs a phototriode. The resistor R2 is a current-limiting resistor of the light-emitting diode, the C3 is a filter capacitor at the power input end of the infrared pair tube G1, and the R3 is an output end pull-down resistor. The output end of the device G1, namely the photocurrent of the triode end and the current of the input end are in a linear relation, when the current of the input end is fixed, the transparency of the infusion tube influences the current of the output end, and the current is converted into the change of voltage through the resistor R3.
As shown in fig. 5, the aforementioned photoelectric detection module may adopt a comparator, one input end of the comparator is connected to the aforementioned receiving module, the other input end of the comparator may be used to input a reference value, and an output end of the comparator is used as an output end of the oily liquid medicine detection unit, so as to determine whether an oily liquid medicine exists in the liquid storage bin according to the detected electric signal and send a detection result to the signal processing unit. In one application scenario, the output OUT of the infrared pair transistor G1 is connected to the inverting input of a voltage comparator, and the positive input of the voltage comparator is connected to a voltage divider circuit, so as to provide a reference voltage, i.e. a reference value. The capacitor C5 is a filter capacitor at the power supply input end of the voltage comparator U3, the inverted input end pin 3 of the voltage comparator U3 is connected with the output pin 5 of the infrared pair transistor G1, the resistor R5 and the resistor R6 are divider resistors, and the connection end of the resistor R5 and the resistor R6 is connected with the non-inverting input end of the voltage comparator U3. The resistor R4 may be used as a pull-up resistor at the output of the aforementioned comparator. Pin 4 outputs a high level when the input voltage at pin 3 of the inverting input of the comparator U3 is higher than the voltage at pin 1 of the non-inverting input, and otherwise outputs a low level.
Fig. 6 is a schematic diagram schematically illustrating a signal processing unit according to an embodiment of the present invention. It will be appreciated that the circuit shown in fig. 6 may be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 applies equally to fig. 6.
In one application scenario, the signal processing unit may include a logic or gate circuit, a first input terminal of the logic or gate circuit may be connected to the output terminal of the capacitance detection circuit, and a second input terminal of the logic or gate circuit may be connected to the output terminal of the photodetection circuit, for performing a logic or operation on the level signal output by the capacitance detection circuit and the level signal output by the photodetection circuit to output a level signal indicating a state of the liquid medicine. As shown in fig. 6, pin 1 and pin 2 of the or gate device U2 are level input pins of the or gate device U2, and pin 4 is a level selection output pin. When at least one of the input levels of the input pins 1 and 2 is high, the output pin 4 is high, and otherwise, the input pin is low.
The signal processing unit can receive the level signals output by the capacitance detection circuit and the photoelectric detection circuit so as to realize accurate detection of the existence of the liquid in the liquid storage bin. In one implementation scenario, the high state is defined as a 1 and the low state is defined as a 0. When the capacitance detection circuit is used for detecting the liquid storage bin, the relative dielectric constant of the oily liquid medicine is low, the relative dielectric constant of the aqueous liquid medicine is high, and when the oily liquid medicine is tested, the output state of the capacitance detection circuit is 0. Wherein the relative permittivity is a physical parameter characterizing dielectric or polarization properties of the dielectric material. The value is equal to the ratio of the capacitance of the capacitor with the same size made by taking the predicted material as the medium and taking the vacuum as the medium, and the value is also the representation of the power storage capacity of the material. When the photoelectric detection circuit is used for detecting the aqueous liquid medicine in the liquid storage bin, the output state of the photoelectric detection circuit is 0 at the moment because the aqueous liquid medicine is in a transparent state when liquid exists or does not exist. In view of this, through the arrangement and the output of the corresponding signal processing unit, the following level state table, namely table 1, output by the liquid level detection device in different liquid medicine states can be generated:
TABLE 1
Furthermore, in order to supply power to each module of the oily liquid medicine detection unit, the aqueous liquid medicine detection unit and the signal processing unit, the liquid medicine detection device in the present embodiment is further provided with a power supply unit, and the power supply unit is connected with the oily liquid medicine detection unit, the aqueous liquid medicine detection unit and the signal processing unit to provide power supply. In an application scenario, the power supply unit may include a power module corresponding to the oily liquid medicine detection unit, the aqueous liquid medicine detection unit, and the signal processing unit. Each corresponding power module comprises at least one filter capacitor, one end of each filter capacitor is connected with the power input end of the liquid medicine detection device, and the other end of each filter capacitor is grounded so as to filter interference. For example, the power module in the aqueous chemical solution detection unit may be provided with a capacitor C1 and a capacitor C2 connected in parallel, thereby achieving a filtering effect. A capacitor C3 may be provided in the power module of the oily liquid medicine detection unit to filter the input power.
Fig. 7 is a schematic view schematically showing a housing of the liquid medicine detection device according to the embodiment of the present invention. It will be appreciated that the architecture shown in fig. 7 may be implemented in the exemplary scenario shown in fig. 1, and thus what is described with respect to fig. 1 is equally applicable to fig. 7.
As shown in fig. 7, the aforementioned liquid level detection apparatus may be sealed by a structure having a certain shape. For example, a rectangular box 207 is used, and a tube hole 206 for passing through the tube 203 is provided in the middle of the box 207. And arranging a circuit board as a carrier of the detection units and the signal processing unit. For example, the capacitance sensing module in the capacitance detection circuit may be disposed on the circuit board, and the pipeline may be tightly attached to the capacitance sensing module. The box seals the circuit board, thereby inhibiting the interference of the external environment and devices on the internal detection circuit. It is to be understood that the sealing process structure proposed in the present solution is only exemplary and not restrictive, and those skilled in the art can select a suitable structural arrangement as needed.
In the scheme of the invention, the residual liquid medicine in the liquid storage bin is detected by combining a capacitance detection mode and a photoelectric detection mode, and the combined mode has the characteristics of small volume and convenience in installation, so that the device can be flexibly installed in various small-sized equipment, such as the needleless injection equipment. When the two methods are used for detection, the direct contact between the device and the liquid medicine can be avoided by utilizing the capacitance sensing principle and the photoelectric sensor principle during detection, so that the risk of liquid medicine pollution is reduced, and the corrosion of the liquid medicine on the device is also avoided. Furthermore, the components are installed through the shell for sealing, so that the interference of the external environment and the like on the detection device can be effectively reduced, and the accuracy of the detection result is improved.
In another aspect of the present invention, the present invention further provides a needleless injection device, which includes a liquid storage chamber, in which a liquid medicine detection device can be disposed, and the liquid medicine detection device can adopt the liquid medicine detection device described in the above embodiments. Furthermore, the liquid medicine detection device can also comprise a processor and an execution mechanism, wherein the execution mechanism responds to the instruction of the processor and executes corresponding action according to the condition of existence of the liquid medicine; for example, the actuator may be a microswitch, an alarm device, or the like.
In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
In light of the foregoing description of the present specification, those skilled in the art will also understand that terms used to indicate orientation or positional relationship, such as "upper", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings of the present specification, which are used for the purpose of convenience in explaining aspects of the present invention and simplifying the description, and do not explicitly or implicitly indicate that the device or element involved must have the specific orientation, be constructed and operated in the specific orientation, and thus the above-described orientation or positional relationship terms should not be interpreted or construed as limiting the aspects of the present invention.
In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.
While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. It is intended that the following claims define the scope of the invention and that the module compositions, equivalents, or alternatives falling within the scope of these claims be covered thereby.
Claims (10)
1. A liquid medicine detection device for a needleless injection apparatus including a liquid storage tank, comprising:
the oily liquid medicine detection unit is arranged in the liquid storage bin and is used for detecting whether oily liquid medicine exists in the liquid storage bin;
the aqueous liquid medicine detection unit is arranged in the liquid storage bin and is used for detecting whether aqueous liquid medicine exists in the liquid storage bin;
and the signal processing unit is connected with the output end of the oily liquid medicine detection unit and the output end of the aqueous liquid medicine detection unit, and is used for identifying the oily liquid medicine or the aqueous liquid medicine and identifying that liquid medicine exists when aqueous liquid medicine or oily liquid medicine exists.
2. The liquid medicine detection device according to claim 1, wherein the aqueous liquid medicine detection unit comprises a capacitance detection circuit, and the capacitance detection circuit comprises at least one capacitance sensing module for determining whether the aqueous liquid medicine exists in the liquid storage bin according to a sensed capacitance value sensed by the capacitance sensing module.
3. The medical liquid detection device according to claim 2, wherein the capacitance sensing module comprises a metal sheet or a metal coil.
4. The liquid medicine detection device according to claim 1 or 2, wherein the oily liquid medicine detection unit comprises a photoelectric detection circuit, the photoelectric detection circuit comprises a transmitting module, a receiving module and a photoelectric detection module, an input end of the photoelectric detection module is connected with an output end of the receiving module, and an output end of the photoelectric detection module is an output end of the oily liquid medicine detection unit and is used for judging whether oily liquid medicine exists in the liquid storage bin according to a signal received by the receiving module.
5. The liquid medicine detection device according to claim 4, wherein the photoelectric detection module comprises a comparator, one input end of the comparator is connected to the receiving module, and the other input end of the comparator is used for inputting a reference value, so as to determine whether an oily liquid medicine exists in the liquid storage bin according to a magnitude relation between the signal received by the receiving module and the reference value.
6. The medical liquid detection device according to claim 4, wherein the emitting module comprises a light emitting diode for providing a light source; the receiving module comprises a photosensitive receiving tube and is used for receiving the optical signal emitted by the light-emitting source and converting the optical signal into an electric signal.
7. The liquid medicine detection device according to claim 6, wherein the transmission module and the reception module employ infrared pair transistors, the transmission module is an infrared transmission tube, and the reception module is a phototriode.
8. The medical fluid detection device according to claim 4, wherein the signal processing unit includes a logical OR gate, a first input terminal of the logical OR gate being connected to the output terminal of the capacitance detection circuit, and a second input terminal of the logical OR gate being connected to the output terminal of the photodetection circuit, for performing a logical OR operation between the level signal output from the capacitance detection circuit and the level signal output from the photodetection circuit to output a level signal indicative of the medical fluid state.
9. The medical fluid detection device according to claim 1, further comprising a power supply unit connected to the oily medical fluid detection unit, the aqueous medical fluid detection unit and the signal processing unit for supplying power.
10. A needleless injection apparatus comprising a reservoir in which a fluid detection device according to any one of claims 1 to 9 is disposed.
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| CN202111063976.XA CN113893059A (en) | 2021-09-10 | 2021-09-10 | Needleless injection device and liquid medicine detection device thereof |
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| CN202111063976.XA CN113893059A (en) | 2021-09-10 | 2021-09-10 | Needleless injection device and liquid medicine detection device thereof |
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