CN204447416U - The blood component separator that a kind of parameter is immediately adjustable - Google Patents

Abstract

The utility model discloses a blood component separator whose parameters can be adjusted in real time, comprising a parameter monitoring device and a control system, the parameter monitoring device is arranged on the panel of the separator, and the parameter monitoring device is connected with the control system through a control line; the parameter The monitoring device is an incremental encoder or an absolute encoder. The parameters of the blood component separator provided by the utility model can be adjusted in real time. By rotating the encoder, the encoder outputs mechanical quantities such as the angular displacement and angular velocity of the rotating shaft with corresponding pulse signals, and judges by recording the number of pulse signals. To adjust the variation of parameters, the rotation direction of the knob is judged by detecting the phase difference of the pulse signal, thus ensuring that the user can independently control the speed of adjusting the parameters, and effectively improving the speed of the blood component separator when adjusting parameters.

Description

A Blood Component Separator with Immediately Adjustable Parameters

technical field

The utility model relates to a separation device, in particular to a separation machine whose parameters can be adjusted in real time.

Background technique

The separator is mainly used for component separation, so the separator is mainly composed of centrifuges, pumps, valves, control systems, etc. When liquid is separated, the control system needs to adjust the parameters of the separation process, such as the speed of the centrifuge, the speed of the pump, the amount of collection, etc. are all parameters to be controlled by the separator.

Now when some separators adjust the control parameters, most of them use the key operation mode of the control panel to input the command to the control system, and then the control system controls the speed of the body; some use the touch screen input, in short, it is manual operation. The common disadvantage of these methods is that the adjustment speed is slow, and the actual adjustment time of the machine lags behind the expected adjustment timing of people. Not only is time wasted, but sometimes the safety risk of the medical device in use will be increased due to the slow adjustment.

Utility model content

In order to solve the problem of speed change and timeliness of the separator, the purpose of this utility model is to provide a separator whose parameters can be adjusted in real time. A control device is directly installed inside the separator to directly measure the speed of the separator, and the parameters are directly fed back to the controller. The system uses real-time comparison and adjustment within the control system to perform mechanical operations and increase the speed of separation.

The utility model adopts the following technical scheme: a separator whose parameters can be adjusted in real time includes a pump and a centrifuge, and also includes a parameter monitoring device and a control system, and the parameter monitoring device is arranged on the centrifuge and/or the pump. On the main shaft, the parameter monitoring device is connected to the control system through a control line; the parameter monitoring device is an incremental encoder or an absolute encoder.

Preferably, the incremental encoder is a photoelectric incremental encoder. Or the incremental encoder is a magnetic incremental encoder.

More preferably, the photoelectric incremental encoder is a rotary photoelectric incremental encoder. The rotary photoelectric incremental encoder includes a rotating part and a fixed part, wherein the rotating part is a turntable with a plurality of gratings, and the turntable is sleeved on the main shaft and rotates with the main shaft; the fixed part Including light source, light baffle, photosensitive element and signal processor; multiple gratings are evenly distributed radially along the circumference of the turntable, the light source and light baffle are arranged on both sides of the turntable, and two parallel gaps are set on the light baffle. When the turntable rotates until one of the gratings corresponds to a slit on the light baffle, the light emitted by the light source will pass through the two corresponding gratings and slits; there are two photosensitive elements, located behind the light baffle, which sense light respectively. light signals from the two slits on the baffle, convert the light signals into pulse signals, and transmit them to the signal processor.

Further speaking, the two photosensitive elements set the received optical signal as two orthogonal pulse signal outputs.

Further, a limit sensor is set beside the turntable, and a limit label is correspondingly set at a grating on the turntable, and the limit sensor senses the position of the limit label as the zero reference position of the turntable.

The utility model provides a separator whose parameters can be adjusted in real time. By rotating the encoder, the encoder outputs mechanical quantities such as the angular displacement and angular velocity of the rotating shaft with corresponding pulse signals, and judges by recording the number of pulse signals. By detecting the phase difference of the pulse signal and judging the rotation direction of the knob to adjust the variation of the parameters, it ensures that the user can control the speed of the adjustment parameters independently, and effectively improves the speed of the separator when adjusting the parameters.

Description of drawings

Figure 1 is a schematic diagram of the installation of an incremental photoelectric encoder on a centrifuge;

Figure 2 is a schematic diagram of the structure of the incremental photoelectric encoder.

In the figure, 1-turntable, 2-light source, 3-light baffle, 4-photosensitive element, 5-signal processor, 6-grating, 7-condenser, 8-limit sensor, spindle 9, 31-first Gap, 32 - Second Gap.

Detailed ways

The utility model is described below in conjunction with the accompanying drawings and embodiments, but the embodiments do not constitute a limitation of the utility model.

A separator whose parameters can be adjusted in real time is mainly composed of a pump, a centrifuge, a parameter monitoring device, a control system and the like. The parameter monitoring device is installed on the panel of the separator, and can be selected and set according to the parameter object to be regulated; the parameter monitoring device is connected with the control system through a control line. When liquid is separated, the control system needs to adjust the parameters of the separation process, such as centrifuge speed, pump speed, etc., which are all parameters to be controlled by the separator.

The parameter monitoring device used in the utility model is an encoder, which converts mechanical motion into electrical signals, that is, converts angular displacement or linear displacement into electrical signals, and then transmits the electrical signals to the control system.

The utility model adopts an incremental encoder, which can convert the displacement into a periodic electrical signal, and then convert the electrical signal into counting pulses, and use the number of pulses to represent the size of the displacement. A rotary incremental encoder that sends out a pulse signal every time the angle of the unit is turned. According to the characteristics set by the system, the number of pulse signals reflects the angle of rotation. How many pulse signals are captured in total can be calculated correspondingly. How much to rotate.

The utility model provides a rotary photoelectric incremental encoder, as shown in Figures 1 and 2, the encoder includes a rotating part and a fixed part, wherein the rotating part is a turntable 1 with several gratings, The turntable 1 is sleeved on the main shaft 9 of the centrifuge (or pump), and rotates together with the main shaft. The fixed part includes a light source 2 , a light baffle 3 , a photosensitive element 4 and a signal processor 5 . The grating 6 is a narrow slit that can transmit light, and a plurality of gratings 6 are uniformly distributed radially along the circumferential direction of the turntable, that is, the rotation intervals are at the same angle, so that when the turntable rotates, these gratings will be irradiated by the light source in turn. The light source 2 is fixed on one side of the turntable, opposite to the plane of the turntable, and the light can be irradiated on the turntable. The light baffle 3 is fixed on the other side of the turntable, and is arranged on both sides of the turntable with the light source. The light baffle can be a plate, but two parallel slits will be set on the same plate, which can be recorded as the first slit 31 and the second slit 32. The two slits have the effect of light transmission. When any slit and When any grating on the turntable corresponds to it, light can pass through. Setting two narrow slits on the light baffle also has the function of distinguishing the direction of rotation of the turntable. For example, we can mark that when the first slit 31 receives light first, we record it as the turntable rotating counterclockwise. When 32 receives light first, we record it as the turntable rotating clockwise. When converting light into electrical signals, we can mark the light captured by the two slits with a 90-degree phase difference, so that we can distinguish the direction of rotation of the turntable. The light baffle can also be two plates, and a slit is respectively arranged on the two plates, which are respectively recorded as the first slit 31 and the second slit 32. These two slits also receive the light emitted by the grating successively. The principle is the same as Two slits are set on one baffle to be the same.

The photosensitive element 4 is a light sensor. The photosensitive element 4 is located behind the light baffle 3 , receives the light signal, converts the light signal into a pulse signal, and transmits it to the signal processor 5 . There are two photosensitive elements 4, which respectively sense the light signals of the first slit 31 and the second slit 32 of the light baffle. The two photosensitive elements output the received signal as two orthogonal pulse signals. According to the phase difference between the two orthogonal pulse signals, the rotation direction of the shaft can be judged, and the number of pulses reflects the angle of rotation of the shaft.

The photosensitive element 4 transmits the sensed signal to the signal processor 5, and the signal processor 5 performs shaping and amplification processing on the received pulse signal and transmits it to the control system.

Further speaking, the light source 2 can be condensed by the condenser lens 7 and projected to the grating 6 to generate light signals that flicker on and off.

In addition, we can set a limit sensor 8 next to the turntable, and correspondingly set a limit label at a certain grating on the turntable. The limit sensor 8 senses the position of the limit label as a zero reference position. Marks the starting position for counting the turntable rotations. Since the two photosensitive elements have a phase difference of 90 degrees, the forward and reverse rotation of the encoder can be judged by comparing which phase is ahead, and the zero reference position of the encoder can be obtained through the zero pulse.

The materials of the encoder turntable are glass, metal, and plastic. The glass turntable is deposited on the glass with very thin score lines. It has good thermal stability and high precision. With a certain thickness, the accuracy is limited, and its thermal stability is an order of magnitude worse than that of glass. Plastic turntables are economical, and their cost is low, but their accuracy, thermal stability, and service life are all worse.

The number of gratings can be customized, and the number determines the resolution of the turntable. The more the number of gratings, the smaller the scale of the turntable and the higher the resolution.

The phase reflects the direction of rotation, so that mechanical quantities such as the direction of rotation of the shaft and the amount of change in parameters can be reflected in the form of pulse signals.

The contact incremental encoder has no photoelectric elements, and controls the contact or disconnection of the two signals and the common point through mechanical contact, thereby outputting two orthogonal signals.

Magnetic incremental encoders are similar to photoelectric incremental encoders. There is no light source and condenser, the grating is replaced by magnetic poles, the photosensitive element is replaced by Hall elements, and the magnetic poles are detected by two Hall elements, which also outputs two voltage signals, which is also applicable to the utility model.

The absolute encoder outputs the absolute position information of the rotor, calculates the rotation speed by detecting the speed of the position change, and detects the rotation direction of the rotor by recording the increase or decrease of the data change.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and what is described in the above-mentioned embodiments and the description is only to illustrate the principle of the utility model, and there will be further changes without departing from the spirit and scope of the utility model. Various changes and improvements all fall within the scope of the claimed utility model.

Claims (7)

1. A blood component separator with real-time adjustable parameters, including a pump and a centrifuge, characterized in that it also includes a parameter monitoring device and a control system, and the parameter monitoring device is arranged on the main shaft of the centrifuge and/or the pump above, the parameter monitoring device is connected to the control system through a control line; The parameter monitoring device is an incremental encoder or an absolute encoder. 2. The blood component separator with instantly adjustable parameters according to claim 1, wherein the incremental encoder is a photoelectric incremental encoder. 3. The blood component separator whose parameters can be adjusted in real time according to claim 1, wherein the incremental encoder is a magnetoelectric incremental encoder. 4. The blood component separator with real-time adjustable parameters according to claim 2, wherein the incremental encoder is a rotary photoelectric incremental encoder. 5. The blood component separator with instantly adjustable parameters according to claim 4, wherein the rotary photoelectric incremental encoder includes a rotating part and a fixed part, wherein, The rotating part is a turntable with multiple gratings, the turntable is sleeved on the main shaft and rotates with the main shaft; The fixed part includes light source, light baffle, photosensitive element and signal processor, The plurality of gratings are evenly distributed radially along the circumferential direction of the turntable, the light source and the light baffle are arranged on both sides of the turntable, Two parallel slits are set on the light baffle, and when the turntable rotates until one of the gratings corresponds to a slit on the light baffle, the light emitted by the light source will pass through the two corresponding gratings and the slit; There are two photosensitive elements, which are located behind the light baffle, respectively sense the light signals from the two slits on the light baffle, convert the light signals into pulse signals, and transmit them to the signal processor. 6 . The blood component separator whose parameters can be adjusted in real time according to claim 5 , wherein the two photosensitive elements set the received optical signals as two orthogonal pulse signal outputs. 7. The blood component separator with real-time adjustable parameters according to claim 5 or 6, characterized in that a limit sensor is set next to the turntable, and a limit label is correspondingly set at a certain grating on the turntable , the limit sensor senses the position of the limit label as the zero reference position of the turntable.