CN218673795U - Blood liquid level sensor - Google Patents
Blood liquid level sensor Download PDFInfo
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- CN218673795U CN218673795U CN202223073828.9U CN202223073828U CN218673795U CN 218673795 U CN218673795 U CN 218673795U CN 202223073828 U CN202223073828 U CN 202223073828U CN 218673795 U CN218673795 U CN 218673795U
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Abstract
The utility model relates to a blood liquid level sensor, wherein a clamping structure for fixing a pipeline or a container through a clamping groove is arranged on a base of the blood liquid level sensor; the base is fixedly provided with at least one photosensitive circuit, a photosensitive element is configured in the photosensitive circuit, the photosensitive element is arranged on one side of the clamping groove, the photosensitive circuit is electrically connected with an amplifying circuit used for processing signals, and the output of the amplifying circuit is connected with the control module after being filtered by a filter circuit; the other side of the clamping groove is provided with a light source capable of generating light with the wavelength of 540nm relative to the photosensitive element, and the light source is arranged opposite to the photosensitive element. The two sides of the clamping groove are respectively provided with a photosensitive circuit and a light source capable of generating light with the wavelength of 540nm, and the blood liquid level detection is carried out by utilizing the principle that light filtered by blood with different heights generates different analog output signals on the photosensitive circuit. Sensitivity is high, and response time is fast, has realized sensor element and blood's thorough isolation, need not contact with blood, avoids polluting blood and need not clear up the maintenance after the use.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a blood liquid level sensor.
Background
Blood processing and blood analysis type instruments require in some specific applications the measurement of the dynamic blood level in a line or vessel in order to obtain or control parameters related to the blood level to be processed and analyzed, such as a fully automatic blood sedimentation meter.
In such blood processing and blood analysis instruments, the accuracy of the level sensor for measuring blood parameters is generally required to be high, and it is necessary to determine whether or not the blood level is present, and to obtain a specific position of the blood level in a very short time. The existing capacitance liquid level sensor has the measuring principle that the capacitance liquid level sensor is inserted between an electrode of a measured liquid and a container wall to form a capacitor, when the height of the measured liquid in the container changes, the capacitance change is triggered, and the liquid level of the measured liquid is sensed through the change of continuous capacitance. The existing resistance-type liquid level sensor is based on the principle that the resistance of the resistance-type liquid level sensor changes due to the change of the liquid level of the liquid to be measured and the change of the contact area of a resistance rod of the resistance-type liquid level sensor, and the liquid level change is measured by measuring the resistance change. The application of the liquid level sensor, namely a capacitance type liquid level sensor and a resistance type liquid level sensor, to the aspect of blood liquid level measurement has the following problems: the capacitance type liquid level sensor and the resistance type liquid level sensor have relatively slow response, and the measuring effect is poor when the liquid level changes violently in a short time; the capacitance type liquid level sensor and the resistance type liquid level sensor need to be in contact with blood and need to be cleaned after being used, so that the maintenance is inconvenient; capacitive level sensors and resistive level sensors can only measure level changes in a single direction.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a blood level sensor.
The utility model provides a blood liquid level sensor, include: the clamping structure is arranged on the base and used for fixing a pipeline or a container through a clamping groove;
the base is fixedly provided with a second circuit board, the second circuit board is provided with at least one photosensitive circuit, a photosensitive element is configured in the photosensitive circuit and is arranged on one side of the clamping groove, the photosensitive circuit is electrically connected with an amplifying circuit used for processing signals, and the output of the amplifying circuit is connected with a control module after being filtered by a filter circuit; the other side of the clamping groove is provided with a light source capable of generating light with the wavelength of 540nm relative to the photosensitive element, the light source is fixed on a first circuit board, the first circuit board is fixed on the base or a second circuit board, so that the light source and the photosensitive element are oppositely arranged, and light emitted by the light source irradiates towards the photosensitive element through the clamping groove.
Still further, the clamping structure comprises: the first clamping block and the second clamping block slide on the base, and the first clamping block and the second clamping block slide in the opposite direction or in the opposite direction; the opposite surfaces of the first clamping block and the second clamping block are arc concave surfaces, and the opposite arc concave surfaces form a clamping groove for fixing a pipeline or a container.
Further, the first and second clamping blocks are connected by a synchronized drive mechanism for limiting the first and second clamping blocks from sliding synchronously toward or away from each other.
Furthermore, a displacement sensor for measuring the offset position is arranged on the first clamping block and/or the second clamping block, and the displacement sensor is in communication connection with a control module.
Furthermore, a light shielding plate for shielding the clamping groove is arranged on the first clamping block or the second clamping block or the first circuit board.
Still further, the light sensing circuit includes: and each photosensitive element is connected with a grounded resistor R2 and a power supply, and the photosensitive element is connected with the resistor R2 and the input of the amplifying circuit.
Furthermore, the amplifying circuit comprises an operational amplifier U1, a non-inverting input terminal of the operational amplifier U1 is connected to the photosensitive circuit, a resistor R4 is connected between an inverting input terminal of the operational amplifier U1 and the ground, a resistor R3 and a variable resistor R5 which are connected in parallel are connected between an output terminal of the operational amplifier U1 and the inverting input terminal, an output terminal of the operational amplifier U1 is connected to a non-inverting input terminal of the operational amplifier U2, an output terminal of the operational amplifier U2 is fed back to the inverting input terminal of the operational amplifier U2, a capacitor C2 serving as a filter circuit is connected between the output terminal of the operational amplifier U2 and the ground, an output terminal of the operational amplifier U2 is connected to an interface P1, and the interface P1 is connected to the control module.
Furthermore, the light sensing part of the light sensing element and the light source are in a strip shape, the light sensing part of the light sensing element extends along the length direction of the clamping groove or is vertically positioned in the length direction of the clamping groove, and the light source is arranged corresponding to the light sensing part.
The embodiment of the utility model provides an above-mentioned technical scheme compares with prior art has following advantage:
the utility model provides a blood liquid level sensor, the light source that clamp groove both sides at fixed pipeline or container set up photosensitive circuit respectively and can produce 540nm wavelength light, the principle that the light after the blood of utilization not co-altitude filters produces different analog output signal on photosensitive circuit carries out blood liquid level and detects, compare current capacitanc liquid level sensor and resistance-type liquid level sensor and adopt light source and photosensitive circuit cooperation, sensitivity is high, response time is fast, the measuring effect to the scene of liquid level sharp change in the short time is better. The sensor element is thoroughly isolated from blood without contacting with the blood, so that the blood is prevented from being polluted, and the sensor is not required to be cleaned and maintained after the sensor element is used. This application can detect the blood liquid level in the pipeline or the container that the level was placed, can detect the blood liquid level in the pipeline or the container of vertical placing again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic view of a blood level sensor according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a blood level sensor in accordance with an embodiment of the present invention;
fig. 3 is a longitudinal cross-sectional view of a blood level sensor in accordance with an embodiment of the present invention;
fig. 4 is a schematic view of a connecting rod of a synchronous drive structure provided in the practice of the present invention;
fig. 5 is a schematic view of a transmission screw rod of another synchronous driving structure provided in the embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a blood level sensor according to an embodiment of the present invention.
The reference numbers and meanings in the figures are as follows:
1. the light source comprises a base, 2, a first clamping block, 21, a first through hole, 3, a second clamping block, 31, a second through hole, 4, a first circuit board, 5, a second circuit board, 6, a photosensitive element, 7 and a light source.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1, 2 and 3, the present invention provides a blood level sensor, including: the blood vessel clamp comprises a base 1, wherein a clamping structure is arranged on the base 1, and the clamping structure is used for fixing a pipeline or a container containing blood through a clamping groove.
As a possible embodiment, the clamping structure includes a first clamping block 2 and a second clamping block 3 fixed on the base 1, the first clamping block 2 and the second clamping block 3 are oppositely arranged, and the opposite surfaces are arc concave surfaces, and the opposite arc concave surfaces form a clamping groove for fixing a pipeline or a container.
As a preferred embodiment, the clamping structure comprises: a first clamping block 2 and a second clamping block 3 which slide on the base 1, wherein the first clamping block 2 and the second clamping block 3 slide towards or away from each other; the opposite surfaces of the first clamping block 2 and the second clamping block 3 are arc concave surfaces, and the opposite arc concave surfaces form a clamping groove for fixing a pipeline or a container. Further, the first and second clamping blocks 2 and 3 are connected by a synchronized drive mechanism for limiting the first and second clamping blocks 2 and 3 from sliding synchronously toward or away from each other. Referring to fig. 4, one possible synchronous driving structure includes: the rotating shaft is fixed on the base 1, the middle parts of two connecting rods with equal length are rotatably connected to the rotating shaft, the two connecting rods form an X shape, and two ends of the two connecting rods are respectively connected to sliding grooves formed in the first clamping block 2 and the second clamping block 3 in a sliding mode. Referring to fig. 5, another possible synchronous driving structure includes a driving screw rotatably connected to the base 1, wherein two ends of the driving screw are respectively provided with threads with opposite directions and consistent specifications, and two ends of the driving screw are respectively screwed and fixed to nuts of the first clamping block 2 and the second clamping block 3. Adapting to different diameter pipes or containers by adjusting the position of the first and second clamping blocks 2, 3; and the synchronous driving structure limits the first clamping block 2 and the second clamping block 3 to synchronously slide towards or away from each other, so as to ensure that the positions of the clamped pipelines or containers are fixed.
The first clamping block 2 and the second clamping block 3 are adjusted to adapt to pipelines or containers with different diameters so as to adapt to the influence of the pipelines or containers with different diameters on the calibration standard of blood liquid level measurement; when the synchronous driving structure is not arranged between the first clamping block 2 and the second clamping block 3, displacement sensors are arranged on the first clamping block 2 and the second clamping block 3 and are in communication connection with a control module; when the synchronous driving structure is provided between the first and second clamping blocks 2 and 3, a displacement sensor for measuring an offset position is provided on the first clamping block 2 or the second clamping block 3. The diameters of pipelines or containers clamped by the first clamping block 2 and/or the second clamping block 3 in a displacement reaction mode are measured through the displacement sensors, and the control module automatically determines corresponding calibration standards according to the diameters.
In the specific implementation process, as shown in fig. 4, one feasible type of the photosensitive element 6 is a TEMT6000 photosensor, the TEMT6000 photosensor can convert an optical signal into an electrical signal and output the electrical signal through an analog signal, specifically, a pin 1 and a pin 3 of the TEMT6000 photosensor are connected with a power VCC, a pin 2 and a pin 4 of the TEMT6000 photosensor are connected with a resistor R2, the resistor R2 is grounded, and the photosensitive element and the resistor R2 are connected with each other for input of the amplifying circuit.
In a specific implementation process, the amplifying circuit includes an operational amplifier U1, a non-inverting input terminal of the operational amplifier U1 is connected between the photosensitive element and the resistor R2, a resistor R4 is connected between an inverting input terminal of the operational amplifier U1 and the ground, a resistor R3 and a variable resistor R5 which are connected in parallel are connected between an output terminal of the operational amplifier U1 and the inverting input terminal, an output terminal of the operational amplifier U1 is connected with a non-inverting input terminal of the operational amplifier U2, an output terminal of the operational amplifier U2 is fed back to the inverting input terminal of the operational amplifier U2, a capacitor C2 serving as a filter circuit is connected between the output terminal of the operational amplifier U2 and the ground, an output terminal of the operational amplifier U2 is connected with an interface P1, and the interface P1 is connected with an analog-to-digital conversion pin of the control module. The operational amplifier U1 amplifies the analog signal output by the photosensitive circuit, the operational amplifier U2 forms a voltage following circuit, and the voltage following circuit has the functions of buffering, isolating and improving the carrying capacity.
The other side of the clamping groove is provided with a light source 7 capable of generating light with wavelength of 540nm relative to the photosensitive element 6, the absorption peak value of blood to light is near the wavelength of 540nm, the light source near the wavelength of 540nm can be selected to enable the photosensitive circuit to obtain more stable analog voltage, the light source 7 is fixed on the first circuit board 4, the first circuit board 4 is fixed on the base 1 or the second circuit board 5, the light source 7 and the photosensitive element 6 are oppositely arranged, and light emitted by the light source 7 irradiates the photosensitive element 6 through the clamping groove. Specifically, the first clamping block 2 is provided with a first through hole 21, the second clamping block 3 is provided with a second through hole 31, and the first circuit board 4 is fixed on the second circuit board 5 or the base 1 through a fixing bolt passing through the first through hole 21 and the second through hole 31.
In a preferred embodiment, a light shielding plate for shielding the clamping groove is disposed on the first clamping block 2 or the second clamping block 3 or the first circuit board 4.
The light sensing part of the light sensing element and the light source are in a strip shape, the light sensing part of the light sensing element extends along the length direction of the clamping groove or is vertically positioned in the length direction of the clamping groove, and the light source is arranged corresponding to the light sensing part. The light sensing part and the light source of the light sensing element are arranged along the length direction of the clamping groove and are used for measuring the height of the blood liquid level in a pipeline or a container when the length direction of the clamping groove is vertical; and the light sensing part and the light source of the light sensing element are vertical to the length direction of the clamping groove and are used for measuring the height of the blood liquid level in the pipeline or the container when the length direction of the clamping groove is horizontal. The blood liquid level measurement device can meet the vertical condition of a pipeline or a container and the horizontal condition of the pipeline or the container.
In the embodiments provided in the present disclosure, it should be understood that the disclosed structures may be implemented in other manners. For example, the above-described structural embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and there may be other divisions when the actual implementation is performed, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, structures or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention 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 (8)
1. A blood level sensor, comprising: the device comprises a base (1), wherein a clamping structure is arranged on the base (1), and the clamping structure is used for fixing a pipeline or a container through a clamping groove;
the base (1) is fixedly provided with a second circuit board (5), at least one photosensitive circuit is arranged on the second circuit board (5), a photosensitive element (6) is configured in the photosensitive circuit, the photosensitive element (6) is arranged on one side of the clamping groove, the photosensitive circuit is electrically connected with an amplifying circuit for processing signals, and the output of the amplifying circuit is connected with a control module after being filtered by a filter circuit; the opposite side of pressing from both sides the groove is relative photosensitive element (6) sets up light source (7) that can produce the wavelength light of 540nm, light source (7) are fixed in on first circuit board (4), first circuit board (4) are fixed in base (1) or second circuit board (5), make light source (7) with photosensitive element (6) set up relatively, the light that light source (7) sent passes through press from both sides the groove shine to photosensitive element (6).
2. The blood level sensor of claim 1, wherein the clamping structure comprises: a first clamping block (2) and a second clamping block (3) sliding on the base (1), wherein the first clamping block (2) and the second clamping block (3) slide towards or away from each other; the opposite surfaces of the first clamping block (2) and the second clamping block (3) are arc concave surfaces, and the opposite arc concave surfaces form a clamping groove for fixing a pipeline or a container.
3. A blood level sensor according to claim 2, wherein the first clamping block (2) and the second clamping block (3) are connected by a synchronized drive mechanism for restricting the first clamping block (2) and the second clamping block (3) from sliding synchronously towards or away from each other.
4. A blood level sensor according to claim 2, wherein a displacement sensor for measuring an offset position is provided on the first clamping block (2) and/or the second clamping block (3), the displacement sensor being communicatively connected to a control module.
5. A blood level sensor according to claim 2, wherein a light shield is provided on the first clamping block (2) or the second clamping block (3) or the first circuit board (4) for shielding the clamping groove.
6. The blood level sensor of claim 1, wherein the light sensing circuit comprises: and each photosensitive element is connected with a grounded resistor R2 and a power supply, and the photosensitive element is connected with the resistor R2 and the input of the amplifying circuit.
7. The blood level sensor according to claim 1, wherein the amplifying circuit comprises an operational amplifier U1, a non-inverting input terminal of the operational amplifier U1 is connected to the light sensing circuit, a resistor R4 is connected between an inverting input terminal of the operational amplifier U1 and the ground, a resistor R3 and a variable resistor R5 are connected in parallel between an output terminal and an inverting input terminal of the operational amplifier U1, an output terminal of the operational amplifier U1 is connected to a non-inverting input terminal of an operational amplifier U2, an output terminal of the operational amplifier U2 is fed back to the inverting input terminal of the operational amplifier U2, a capacitor C2 serving as a filter circuit is connected between the output terminal of the operational amplifier U2 and the ground, an output terminal of the operational amplifier U2 is connected to an interface P1, and the interface P1 is connected to the control module.
8. The blood level sensor according to claim 1, wherein the light-sensing portion of the light-sensing element and the light source are elongated, the light-sensing portion of the light-sensing element extends along the longitudinal direction of the clamping groove and/or is perpendicular to the longitudinal direction of the clamping groove, and the light source is disposed corresponding to the light-sensing portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223073828.9U CN218673795U (en) | 2022-11-18 | 2022-11-18 | Blood liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223073828.9U CN218673795U (en) | 2022-11-18 | 2022-11-18 | Blood liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218673795U true CN218673795U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223073828.9U Active CN218673795U (en) | 2022-11-18 | 2022-11-18 | Blood liquid level sensor |
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|---|---|
| CN (1) | CN218673795U (en) |
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- 2022-11-18 CN CN202223073828.9U patent/CN218673795U/en active Active
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