CN216410070U - Piston position recognition device - Google Patents
Piston position recognition device Download PDFInfo
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- CN216410070U CN216410070U CN202123399898.9U CN202123399898U CN216410070U CN 216410070 U CN216410070 U CN 216410070U CN 202123399898 U CN202123399898 U CN 202123399898U CN 216410070 U CN216410070 U CN 216410070U
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Abstract
The utility model relates to a piston position recognition device, which comprises a sensor control board and a plurality of reflective photoelectric sensors; the reflective photoelectric sensor is electrically connected with the sensor control board; the plurality of the reflective photoelectric sensors are arranged in parallel to the motion direction of the piston; and a reflective strip is arranged on one side of the piston, which is at least opposite to the reflective photoelectric sensor. The utility model has lower requirement on detection environment, high detection precision, identification precision of 0.1mm and identification area of 200mm, and can accurately identify the position of the piston to judge the liquid level of the liquid and further obtain the volume of the liquid discharged and discharged.
Description
Technical Field
The utility model belongs to the technical field of optical detection, and particularly relates to a piston position recognition device.
Background
Referring to the attached figure 1, the existing product mainly identifies the position of a piston through a photoelectric correlation mode, the scheme mainly comprises a light-emitting control panel (A1), a white LED lamp bead array (A2), a receiving panel (A3) and a linear CCD sensor (A4), wherein the middle part of the product is a centrifugal barrel, a piston is arranged in the centrifugal barrel and consists of a light-transmitting part and a light-proof part, the two sides of the piston are light-proof parts, the middle part of the piston is a light-transmitting part, an air pump is connected below the piston and is a power source for controlling the piston to move up and down so as to discharge liquid into and out of the centrifugal barrel, and the scheme is used for identifying the position of the piston to indirectly and accurately measure the volume of the liquid discharged and discharged. Identification principle: the light-emitting control panel (A1) controls the white LED lamp bead array (A2) to emit parallel light to irradiate the centrifugal barrel, the light-transmitting area of the piston in the centrifugal barrel allows light to pass through, the light-tight area shields the light from the light, the linear CCD sensor on the receiving panel (A3) detects the area with light, and similar light-sensing areas on the CCD sensor form 'dark and bright' alternate stripes, so that the position of the bright stripes is known, and the position of the piston is detected.
Above-mentioned detection scheme comes discernment piston position mainly through the photoelectricity correlation formula, the shortcoming is that the correlation formula is higher to the light source requirement, want parallel light and have certain requirement to the light intensity, light need be through centrifugal barrel outer wall- > -piston outer wall > piston outer wall- > centrifugal barrel outer wall reachs the accept board at last, be equivalent to passing 4 layers of outer walls, the outer wall light will attenuate once every time passes, and the depth of parallelism of light also can receive the influence, thereby cause the light that reachs the receiving area very weak, and then influence final discernment.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention provides a cell culture tail gas heating device to solve the problems of the prior art.
The purpose of the utility model is realized as follows:
the piston position identification device comprises a sensor control board and a plurality of reflective photoelectric sensors;
the reflective photoelectric sensor is electrically connected with the sensor control board;
the plurality of the reflective photoelectric sensors are arranged in parallel to the motion direction of the piston;
and a reflective strip is arranged on one side of the piston, which is at least opposite to the reflective photoelectric sensor.
The utility model has lower requirement on detection environment and high detection precision, and can accurately identify the position of the piston so as to judge the liquid level of the liquid and further obtain the volume of the discharged liquid.
A preferred embodiment of the present invention includes a housing, the sensor control board being disposed within the housing.
And meanwhile, the shell is arranged, so that the control panel can be protected, and the control panel is prevented from being damaged or fails due to the influence of the temperature and the humidity of the surrounding environment.
In a preferred embodiment of the present invention, a sidewall of the housing is parallel to the direction of the movement of the piston, and a plurality of the reflective photoelectric sensors are disposed on the sidewall.
The shell can be regular or irregular, as long as a side wall is ensured to be parallel to the motion direction of the piston so as to facilitate the arrangement of the reflective photoelectric sensor.
In a preferred embodiment of the present invention, the reflective photoelectric sensor is a linear sensor that outputs an analog signal.
In a preferred embodiment of the present invention, the pitch between the plurality of reflective photoelectric sensors is 3 mm.
The accuracy is influenced by too large distance, however, the distance between the sensors is too small, the sensors can be influenced mutually, and the influence can be reduced while the accuracy is improved by controlling the proper distance.
In a preferred embodiment of the present invention, the piston is disposed in a centrifugal barrel, and the centrifugal barrel has an upper inlet and a lower outlet; the piston discharges and sucks liquid through an upper inlet and an upper outlet, and a lower inlet and a lower outlet of the centrifugal barrel are connected with an air pump.
The liquid level is judged by a sensor by pushing a piston by an air pump to discharge and suck liquid.
In a preferred embodiment of the present invention, each of the reflective photoelectric sensors is 5mm away from the wall of the centrifugal bucket.
The distance from the sensor control panel to the centrifuge bucket is 5mm, which is the optimal recognition distance for the sensor.
In a preferred embodiment of the present invention, the reflective strips are 3mm wide.
In a preferred embodiment of the present invention, the reflective strips are circumferentially disposed on the outer wall of the middle portion of the piston.
The light reflecting strips are arranged in the middle part, so that the position of the liquid level can be conveniently identified and judged.
Compared with the prior art, the utility model can at least realize the following beneficial effects:
the utility model has lower requirement on detection environment, high detection precision, identification precision of 0.1mm and identification area of 200mm, and can accurately identify the position of the piston to judge the liquid level of the liquid and further obtain the volume of the liquid discharged and discharged.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present specification, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic structural diagram of the prior art.
FIG. 2 is a schematic diagram of the present invention.
Reference numerals:
1. a sensor control board; 2. a reflective photoelectric sensor; 3. a piston; 4. reflecting the light; 5. incident light; 6. an upper inlet and an outlet; 7. a liquid region; 8. an air region; 9. a lower inlet and outlet; s, a transmitting end of a sensor; r, a receiving end of the sensor; w, a reflective strip.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.
For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.
The utility model discloses a piston position recognition device, as shown in fig. 2, the scheme mainly comprises a sensor control board 1, reflective photoelectric sensors 2 (the width of each sensor is 3mm, and the sensors are linear sensors which output analog signals with high precision), the reflective photoelectric sensors 2 are arranged at equal intervals, the distance between each sensor is 3mm, totally 32 sensors are adopted, the sensors can be increased and decreased according to different occasions, a centrifugal barrel is arranged in the middle position, a piston 3 is arranged in the centrifugal barrel, a 3mm special material white strip (namely a light-reflecting strip W) is arranged on the piston 3, the distance between the sensor control board and the centrifugal barrel is 5mm, and the sensor control board is the optimal recognition distance of the sensors.
Specifically, the reflective photoelectric sensor 2 is electrically connected with the sensor control board 1;
a plurality of the reflective photoelectric sensors 2 are arranged in parallel to the moving direction of the piston 3;
and a reflective strip W is arranged on one side of the piston 3 at least opposite to the reflective photoelectric sensor 2.
The utility model has lower requirement on detection environment and high detection precision, and can accurately identify the position of the piston so as to judge the liquid level of the liquid and further obtain the volume of the discharged liquid.
Specifically, including a casing, sensor control panel 1 sets up in the casing.
And meanwhile, the shell is arranged, so that the control panel can be protected, and the control panel is prevented from being damaged or fails due to the influence of the temperature and the humidity of the surrounding environment.
Specifically, a side wall of the housing is parallel to the movement direction of the piston 3, and the plurality of reflective photoelectric sensors are arranged on the side wall.
The shell can be regular or irregular, as long as a side wall is ensured to be parallel to the motion direction of the piston so as to facilitate the arrangement of the reflective photoelectric sensor.
Specifically, the reflective photoelectric sensor 2 is a linear sensor that outputs an analog signal.
Specifically, the pitch between the plurality of reflective photoelectric sensors 2 is 3 mm.
The accuracy is influenced by too large distance, however, the distance between the sensors is too small, the sensors can be influenced mutually, and the influence can be reduced while the accuracy is improved by controlling the proper distance.
Specifically, the piston 3 is arranged in a centrifugal barrel, and the centrifugal barrel is provided with an upper inlet and outlet 6 and a lower inlet and outlet 9; the piston 3 discharges 6 and sucks liquid through the upper inlet and outlet, so that a liquid area 7 is formed in a cavity between the piston 3 and the upper inlet and outlet 6, and the lower inlet and outlet of the centrifugal barrel are connected with an air pump, so that an air area 8 is formed in the cavity between the piston 3 and the lower inlet and outlet 9.
The liquid level is judged by a sensor by pushing a piston by an air pump to discharge and suck liquid.
Specifically, each reflective photoelectric sensor 2 is 5mm away from the wall of the centrifugal bucket.
The sensor control board 1 is at a distance of 5mm from the centrifuge bucket, where it is the optimal recognition distance for the sensor 2.
Specifically, the reflective strips W are 3mm wide.
Specifically, the reflective strips W are circumferentially arranged on the outer wall of the middle part of the piston 3.
The reflective strips W are arranged in the middle part, so that the position of the liquid level can be conveniently identified and judged.
Identification principle: the transmitting end S of the sensor sends infrared light to irradiate the white strip through the centrifugal barrel, the white strip reflects the light out to enter the receiving end R of the sensor, and light intensity signals received by different positions are different, so that the positions are identified.
The method specifically comprises the following steps: firstly, the sensor control board 1 is controlled to open all the sensors 2, all the sensors 2 start to work, the sensor transmitting end S emits infrared light to irradiate the centrifugal barrel, the light reflected by the white object irradiated by the light is strongest and the light reflected by the black object irradiated by the light is weakest according to the optical principle, the white bar is manufactured based on the principle and is specially processed, the light intensity values of the sensors at different positions are different, the light signal reflected by the sensor which is closer to the piston straight line is stronger, the light signal reflected by the sensor which is farther from the piston straight line is weaker, and based on the result, the sensor with the strongest reflected light is found out, however, it is not possible to identify the 0.1mm spacing when the sensors themselves have a width, plus there is also a distance between the sensors, so the first step is to find the 3 sensors with the strongest reflected light. The piston position is now between these 3 sensors, and then the sensors in the other positions are all turned off, since there is interference between the different sensors and then the intensity of the light reflected by the 3 sensors is read again, the second step finds the 2 sensors with the strongest reflected light from between the 3 sensors, which now indicates that the piston position is between the two sensors, then switches off the other sensor, secondly, reading the light intensity of the reflected light of the 2 sensors again, and thirdly, finding out the sensor with the strongest reflected light from the space between the 2 sensors, which shows that the piston is close to the sensor at the moment, the other sensor is closed at the moment, and only the last sensor is left because the reflected light intensity and the reflected distance of the sensor are linear, the relative position of the piston from the sensor can now be known, and consequently the absolute position of the piston.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are described in further detail, it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (9)
1. The piston position identification device is characterized by comprising a sensor control board and a plurality of reflective photoelectric sensors;
the reflective photoelectric sensor is electrically connected with the sensor control board;
the plurality of the reflective photoelectric sensors are arranged in parallel to the motion direction of the piston;
and a reflective strip is arranged on one side of the piston, which is at least opposite to the reflective photoelectric sensor.
2. An identification device as claimed in claim 1, comprising a housing, said sensor control panel being disposed within said housing.
3. The identification device according to claim 2 wherein a side wall of the housing is parallel to the direction of movement of the piston, a plurality of said reflective photo-sensors being disposed on said side wall.
4. An identification device as claimed in claim 1, characterized in that the reflective photo-sensor is a linear sensor outputting an analog signal.
5. An identification device as claimed in claim 1, characterized in that the spacing between a plurality of said reflective photo-sensors is 3 mm.
6. The identification device of claim 1 wherein said piston is disposed within a centrifuge bowl, the centrifuge bowl having an upper inlet and an outlet, and a lower inlet and outlet; the piston discharges and sucks liquid through an upper inlet and an upper outlet, and a lower inlet and a lower outlet of the centrifugal barrel are connected with an air pump.
7. An identification device as claimed in claim 6, wherein each of said reflective photo-sensors is 5mm from the centrifuge bowl wall.
8. An identification device as claimed in claim 5, wherein the reflective strips are 3mm wide.
9. An identification device as claimed in claim 8 wherein said reflective strip is circumferentially disposed on the central outer wall of said piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123399898.9U CN216410070U (en) | 2021-12-30 | 2021-12-30 | Piston position recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123399898.9U CN216410070U (en) | 2021-12-30 | 2021-12-30 | Piston position recognition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216410070U true CN216410070U (en) | 2022-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123399898.9U Active CN216410070U (en) | 2021-12-30 | 2021-12-30 | Piston position recognition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216410070U (en) |
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2021
- 2021-12-30 CN CN202123399898.9U patent/CN216410070U/en active Active
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