CN114216535B - Liquid balance monitoring method based on radio frequency signals - Google Patents
Liquid balance monitoring method based on radio frequency signals Download PDFInfo
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- CN114216535B CN114216535B CN202111519194.2A CN202111519194A CN114216535B CN 114216535 B CN114216535 B CN 114216535B CN 202111519194 A CN202111519194 A CN 202111519194A CN 114216535 B CN114216535 B CN 114216535B
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- 239000007788 liquid Substances 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003814 drug Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a liquid allowance monitoring method based on radio frequency signals, wherein a signal receiver is vertically arranged outside a liquid container near an outlet, the liquid container is hung on one side of the upper end of a bracket, and a signal transmitter is hung on the other side of the upper end of the bracket; the signal transmitter transmits a signal to the signal receiver, and the signal receiver receives the signal and back scatters the signal; when the liquid level is higher than the top antenna of the signal receiver, the warning lamp is green, and the liquid amount in the liquid container is sufficient; when the liquid level is continuously reduced until the top antenna is exposed, the warning lamp turns yellow to indicate that the liquid amount in the liquid container is reduced by more than half; when the liquid level is continuously reduced to expose the bottom antenna, the warning lamp turns red to indicate that the liquid in the liquid container is about to flow out. The method can effectively monitor the residual quantity of the liquid and lighten the application requirements of the workload.
Description
Technical Field
The invention belongs to the technical field of monitoring of the Internet of things, and particularly relates to a liquid balance monitoring method based on a radio frequency signal.
Background
With the continuous development of the internet of things technology, more and more simple repeated operations can be replaced by machines, so that the burden of operators is reduced, and the working efficiency is improved. For example: in the hospital treatment process, many patients need to receive transfusion treatment, when the transfusion in the medicine bottle is finished, if the transfusion bottle is forgotten to be replaced, the backflow of blood into the transfusion bottle is a very dangerous thing, so that the accident needs to be avoided by monitoring the residual quantity of the medicine liquid through eyes in clinical practice, but the working intensity of nursing staff is increased, the psychological burden of the patients and family members is increased, especially, transfusion at night is carried out, the family members need to keep awake all the time, and the accompanying process is very energy-consuming.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a liquid residual quantity monitoring method based on radio frequency signals, which is used for intelligently monitoring the liquid residual quantity condition and carrying out corresponding warning.
The technical scheme of the invention is as follows: a liquid balance monitoring method based on radio frequency signals, comprising the steps of:
1) A signal receiver is vertically arranged outside the liquid container near the outlet, the liquid container is hung on one side of the upper end of the bracket, a signal transmitter is hung on the other side of the upper end of the bracket, and a warning lamp is arranged at a remote monitoring station;
2) The signal transmitter transmits signals to the signal receiver, the signal transmitter cannot acquire signals backscattered by the signal receiver due to the influence of liquid on electromagnetic waves, and as the liquid level in the liquid container is continuously reduced, the top antenna and the bottom antenna of the signal receiver receive the signals and backscatter the signals, and the signal transmitter receives the backscatter signals;
3) When the liquid level is higher than the top antenna of the signal receiver, the signal transmitter cannot receive the back scattering signal of the top antenna, and the warning lamp is green at the moment, so that the liquid amount in the liquid container is sufficient;
when the liquid level is continuously reduced to the state that the top antenna is exposed, the signal transmitter can receive the back scattering signal of the top antenna, the warning lamp turns yellow at the moment to indicate that the liquid amount in the liquid container is reduced by more than half, and when the liquid level is continuously reduced, the signal transmitter continuously receives the back scattering signal of the top antenna, and the same received signal is set as a default value;
when the liquid level is continuously reduced to expose the bottom antenna, the signal emitter can receive the back scattering signal of the bottom antenna, and the warning lamp turns red at the moment to indicate that the liquid in the liquid container is about to drain.
Further, the signal receiver is secured by a worker near the outlet of the liquid container or by the liquid producer during processing.
Further, the top antenna of the signal receiver is located in the middle of the liquid container, and the bottom antenna is located at the outlet of the liquid container.
Further, the signal transmitter may also be integrally provided in the stand.
Further, in step 3), the principle of the color change of the warning lamp is as follows: setting the signal value data received by the signal transmitter as S i, taking one signal value every y signal values to obtain a group of new signal value data M x, if M x is equal to a default value, representing with 1, if M x is not equal to the default value, representing with 0, and obtaining a group of new data Q x represented with 0 or 1;
The first derivative is calculated for the new data Q x, and the derivative formula is as follows:
Pk＝Qh-Qh-1；
Wherein, h is more than 1, P 1＝Q1, and the data P obtained by derivation is divided into three types according to 0, 1 or-1;
if p=0, it means that the signal value does not fluctuate; if p=1 or p= -1, it indicates that the signal value fluctuates;
In the step 3), in the process that the liquid in the liquid container is just reduced to the upper end of the top antenna, the data P is always kept to be 0, the signal value is not fluctuated, the liquid in the liquid container is sufficient, and the warning lamp is green;
In the process that the liquid in the liquid container is reduced to the position between the top antenna and the upper end of the bottom antenna after the liquid is exposed, the data P is changed from 0 to 1, then is changed to 0 and continuously is 0, the signal value fluctuates after the top antenna is exposed, then the signal value is kept unchanged, at the moment, the liquid in the liquid container is less than half, and the liquid is continuously reduced, and the warning lamp is changed to yellow;
After the liquid in the liquid container is reduced to the state that the bottom antenna is exposed, the data P is changed from 0 to-1, so that the signal value fluctuates after the bottom antenna is exposed, the liquid in the liquid container is about to flow out, and the warning lamp turns red.
Further, the method comprises the steps of,Where L is the liquid volume, V is the liquid flow rate, and Δt is the emission interval time of the signal emitter.
Compared with the prior art, the invention has the beneficial effects that: according to the liquid balance monitoring method based on the radio frequency signals, the traditional flow monitoring is mostly dependent on visual inspection, so that a large amount of labor cost is consumed, working errors are easy to occur in a long-time working state, and serious accidents are caused. In order to improve the intelligence of the monitoring process, compared with the method for monitoring the liquid residual quantity by visual observation, the liquid residual quantity monitoring method based on the radio frequency signals can thoroughly realize real-time sensing and monitoring. In the monitoring, green, yellow and red early warning can be established, sufficient operation arrangement time is provided, and a more reasonable and perfect management mechanism can be established. The method is simple and efficient, can effectively reduce the workload and improve the working efficiency.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Wherein, 1-liquid container, 2-signal receiver, 21-top antenna, 22-bottom antenna, 3-support, 4-signal transmitter.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Examples: as shown in fig. 1, a liquid level monitoring method based on radio frequency signals comprises the following steps:
1) A signal receiver 2 is vertically arranged outside the liquid container 1 near the outlet, the signal receiver 2 is fixed near the outlet of the liquid container 1 by a worker or is fixed near the outlet of the liquid container 1 by a liquid producer in the processing process, a top antenna 21 of the signal receiver 2 is positioned in the middle of the liquid container 1, a bottom antenna 22 is positioned at the outlet of the liquid container 1, the liquid container 1 is hung on one side of the upper end of a bracket 3, a signal transmitter 4 is hung on the other side of the upper end of the bracket 3, the signal transmitter 4 can also be integrally arranged in the bracket 3, and a warning lamp is arranged at a remote monitoring station;
2) The signal transmitter 4 transmits a signal to the signal receiver 2, the signal transmitter 4 cannot acquire the signal backscattered by the signal receiver 2 due to the influence of the liquid on the electromagnetic wave, and as the liquid level in the liquid container 1 is continuously lowered, the top antenna 21 and the bottom antenna 22 of the signal receiver 2 receive the signal and backscatter the signal, and the signal transmitter 4 receives the backscatter signal;
3) When the liquid level is higher than the top antenna 21 of the signal receiver 2, the signal transmitter 4 cannot receive the back scattering signal of the top antenna 21, and the warning lamp is green at this time, so that the liquid amount in the liquid container 1 is sufficient;
when the liquid level is continuously lowered until the top antenna 21 is exposed, the signal emitter 4 can receive the back scattering signal of the top antenna 21, the warning light turns yellow at the moment to indicate that the liquid amount in the liquid container 1 is reduced by more than half, and when the liquid level is continuously lowered, the signal emitter 4 continuously receives the back scattering signal of the top antenna 21, and the same received signal is set as a default value;
When the liquid level is continuously reduced to expose the bottom antenna 22, the signal emitter 4 can receive the back scattering signal of the bottom antenna 22, and the warning light turns red at this time to indicate that the liquid in the liquid container 1 is about to drain;
in the step 3, the principle of the color change of the warning lamp is as follows: the signal value data received by the signal transmitter 4 is set to S i, one signal value is taken every y signal values, Wherein L is liquid volume, V is liquid flow rate, and Deltat is emission interval time of the signal emitter, a new set of signal value data M x is obtained, if M x is equal to a default value, 1 is used for representing, if M x is not equal to the default value, 0 is used for representing, and a new set of data Q x is used for representing 0 or 1 is obtained;
The first derivative is calculated for the new data Q x, and the derivative formula is as follows:
Pk＝Qh-Qh-1；
Wherein, h is more than 1, P 1＝Q1, and the data P obtained by derivation is divided into three types according to 0, 1 or-1;
if p=0, it means that the signal value does not fluctuate; if p=1 or p= -1, it indicates that the signal value fluctuates;
in step 3, during the process from the beginning of the liquid reduction in the liquid container 1 to the upper end of the top antenna 21, the data P is always kept at 0, which indicates that the signal value does not fluctuate, the liquid in the liquid container 1 is sufficient, and the warning light is green;
After the liquid in the liquid container 1 is reduced to the state that the top antenna 21 is exposed, and in the process that the liquid is reduced to the state that the liquid is between the upper ends of the bottom antennas 22, the data P is changed from 0 to 1, then is changed to 0 and continuously is 0, which means that the signal value fluctuates after the top antenna 21 is exposed, then the signal value is kept unchanged, at the moment, the liquid in the liquid container 1 is less than half, and continuously reduces, and the warning lamp turns yellow;
After the liquid in the liquid container 1 is reduced to the state that the bottom antenna is exposed, the data P is changed from 0 to-1, which indicates that the signal value fluctuates after the bottom antenna 22 is exposed, and the liquid in the liquid container 1 is about to run out, so that the warning light turns red.
The specific model of the electronic component is not specifically specified, and all the electronic components can be common products sold in the market, so long as the use requirements of the electronic component can be met.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the invention thereto, but to limit the invention thereto, and any modifications, equivalents, improvements and equivalents may be made thereto without departing from the spirit and principles of the invention.
Claims (4)
1. The liquid balance monitoring method based on the radio frequency signal is characterized by comprising the following steps of:
1) a signal receiver (2) is vertically arranged outside the liquid container (1) near an outlet, the liquid container (1) is hung on one side of the upper end of a bracket (3), a signal transmitter (4) is hung on the other side of the upper end of the bracket (3), and a warning lamp is arranged at a remote monitoring station;
2) The signal transmitter (4) transmits signals to the signal receiver (2), the signal transmitter (4) cannot acquire the signals backscattered by the signal receiver (2) due to the influence of the liquid on electromagnetic waves, as the liquid level in the liquid container (1) is continuously reduced, the top antenna (21) and the bottom antenna (22) of the signal receiver (2) receive the signals and backscatter the signals, and the signal transmitter (4) receives the backscattered signals;
3) When the liquid level is higher than the top antenna (21) of the signal receiver (2), the signal transmitter (4) can not receive the back scattering signal of the top antenna (21), and the warning lamp is green at the moment, so that the liquid amount in the liquid container (1) is sufficient;
When the liquid level is continuously reduced until the top antenna (21) is exposed, the signal emitter (4) can receive a back scattering signal of the top antenna (21), at the moment, the warning lamp turns yellow to indicate that the liquid amount in the liquid container (1) is reduced by more than half, and when the liquid level is continuously reduced, the signal emitter (4) continuously receives the back scattering signal of the top antenna (21), and the same received signal is set as a default value;
When the liquid level is continuously reduced to expose the bottom antenna (22), the signal emitter (4) can receive a back scattering signal of the bottom antenna (22), and the warning lamp turns red at the moment to indicate that the liquid in the liquid container (1) is about to flow out;
In the step 3), the principle of the color change of the warning lamp is as follows: setting the signal value data received by the signal transmitter (4) as S i, taking one signal value every y signal values to obtain a group of new signal value data M x, if M x is equal to a default value, representing 1, if M x is not equal to the default value, representing 0, and obtaining a group of new data Q x represented by 0 or 1;
The first derivative is calculated for the new data Q x, and the derivative formula is as follows:
Pk=Qh-Qh-1;
wherein, h is more than 1, P 1=Q1, and the data P obtained by derivation is divided into three types according to 0, 1 or-1;
if p=0, it means that the signal value does not fluctuate; if p=1 or p= -1, it indicates that the signal value fluctuates;
in the step 3), in the process that the liquid in the liquid container (1) is just reduced to the position between the upper ends of the top antennas (21), the data P is always kept to be 0, so that the signal value does not fluctuate, the liquid in the liquid container (1) is sufficient, and the warning lamp is green;
After the liquid in the liquid container (1) is reduced to the position where the top antenna (21) is exposed and in the process of the liquid being reduced to the position where the upper end of the bottom antenna (22) is exposed, the data P is changed from 0 to 1, then is changed to 0 and continuously is 0, so that the signal value fluctuates after the top antenna (21) is exposed, then the signal value is kept unchanged, at the moment, the liquid in the liquid container (1) is less than half, and continuously reduces, and the warning lamp turns yellow;
after the liquid in the liquid container (1) is reduced to the state that the bottom antenna is exposed, the data P is changed from 0 to-1, the signal value fluctuates after the bottom antenna (22) is exposed, and at the moment, the liquid in the liquid container (1) is about to run out, and the warning lamp turns red;
wherein L is liquid volume, V is liquid flow rate,/> Is the transmission interval time of the signal transmitter (4).
2. A method of monitoring the liquid level based on radio frequency signals according to claim 1, characterized in that the signal receiver (2) is fixed by the staff in the vicinity of the outlet of the liquid container (1) or by the liquid producer in the vicinity of the outlet of the liquid container (1) during processing.
3. A liquid level monitoring method based on radio frequency signals according to claim 1, characterized in that the top antenna (21) of the signal receiver (2) is located in the middle of the liquid container (1), and the bottom antenna (22) is located at the outlet of the liquid container (1).
4. A method of monitoring the liquid level based on radio frequency signals according to claim 1, characterized in that the signal transmitter (4) is also integrated in the holder (3).
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| CN202111519194.2A CN114216535B (en) | 2021-12-13 | 2021-12-13 | Liquid balance monitoring method based on radio frequency signals |
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| CN202111519194.2A CN114216535B (en) | 2021-12-13 | 2021-12-13 | Liquid balance monitoring method based on radio frequency signals |
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| CN114216535B true CN114216535B (en) | 2024-05-03 |
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