CN114216535A - Liquid allowance monitoring method based on radio frequency signal - Google Patents
Liquid allowance monitoring method based on radio frequency signal Download PDFInfo
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- CN114216535A CN114216535A CN202111519194.2A CN202111519194A CN114216535A CN 114216535 A CN114216535 A CN 114216535A CN 202111519194 A CN202111519194 A CN 202111519194A CN 114216535 A CN114216535 A CN 114216535A
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- liquid
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- liquid container
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- warning lamp
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- 239000007788 liquid Substances 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 239000003814 drug Substances 0.000 description 4
- 238000001802 infusion Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 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
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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
Abstract
The invention discloses a liquid allowance monitoring method based on radio frequency signals.A signal receiver is vertically arranged outside a liquid container close to 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 backscatters the signal; when the liquid level is higher than the top antenna of the signal receiver, the warning lamp is green, which indicates that 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, which indicates that the amount of liquid 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 amount of the liquid and reduce the application requirement of workload.
Description
Technical Field
The invention belongs to the technical field of monitoring of the Internet of things, and particularly relates to a liquid allowance monitoring method based on radio frequency signals.
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, a plurality of patients need to receive infusion treatment, when the liquid medicine in the medicine bottle is infused completely, if the infusion bottle is forgotten to be replaced, blood flows back to the infusion bottle, which is a very dangerous thing, therefore, in clinical practice, the accident needs to be avoided by monitoring the liquid medicine allowance through human eyes, but not only the working strength of nursing staff is increased, but also the psychological burden of the patients and family members is increased, particularly, the liquid medicine is infused at night, the family members need to be kept awake all the time, and the energy is consumed in the accompanying and attending process.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for monitoring remaining amount of liquid based on radio frequency signals, which can intelligently monitor the remaining amount of liquid and perform corresponding warning.
The technical scheme of the invention is as follows: a liquid residual quantity monitoring method based on radio frequency signals comprises the following steps:
1) a signal receiver is vertically arranged outside the liquid container close to the outlet, the liquid container is hung on one side of the upper end of the support, a signal transmitter is hung on the other side of the upper end of the support, and a warning lamp is arranged at a remote monitoring station;
2) the signal emitter emits signals to the signal receiver, the signal emitter cannot acquire signals backscattered by the signal receiver due to the influence of liquid on electromagnetic waves, the top antenna and the bottom antenna of the signal receiver receive the signals and backscatter the signals along with the continuous reduction of the liquid level in the liquid container, and the signal emitter receives the backscatter signals;
3) when the liquid level is higher than the top antenna of the signal receiver, the signal emitter cannot receive the back scattering signal of the top antenna, and the warning lamp is green at the moment and indicates that the liquid amount in the liquid container is sufficient;
when the liquid level continuously decreases until the top antenna is exposed, the signal emitter can receive a backscatter signal of the top antenna, the warning lamp turns yellow at the moment, the liquid amount in the liquid container is reduced by more than half, and when the liquid level continuously decreases, the signal emitter continuously receives the backscatter signal of the top antenna and sets the same received signal as a default value;
when the liquid level continuously reduces to make the bottom antenna expose, signal transmitter can receive the backscatter signal of bottom antenna, and the warning light becomes red this moment, shows that the liquid volume in the liquid container is about to run out.
Further, the signal receiver is fixed near the outlet of the liquid container by a worker or fixed near the outlet of the liquid container during a process by a liquid producer.
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 emitter may also be integrated in the holder.
Further, in step 3), the principle of the color change of the warning light is as follows: setting signal value data received by the signal transmitter to SiTaking one signal value every y signal values to obtain a new set of signal value data MxIf M isxEqual to the default value, is denoted by 1, if M isxNot equal to the default value, it is represented by 0, and a new set of data Q represented by 0 or 1 is obtainedx；
For new data QxSolving a first derivative by the following formula:
Pk＝Qh-Qh-1；
in the formula, h>1，P1＝Q1Dividing the derived data P into three classes according to 0, 1 or-1;
if P is 0, it represents that the signal value is not fluctuated; if P-1 or P-1, then signal value fluctuation is indicated;
in the step 3), in the process that the liquid in the liquid container is just reduced to the position between the upper ends of the top antennas, 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;
after the liquid in the liquid container is reduced until the top antenna is exposed and in the process of reducing the liquid to the upper end of the bottom antenna, changing the data P from 0 to 1, then changing the data P to 0 and continuing to be 0, indicating that the signal value fluctuates after the top antenna is exposed, then keeping the signal value unchanged, wherein at the moment, the liquid in the liquid container is less than a half and continuously reduced, and the warning lamp is changed to yellow;
after the liquid in the liquid container is reduced to expose the bottom antenna, the data P is changed from 0 to-1, which shows that the signal value fluctuates after the bottom antenna is exposed, at this time, the liquid in the liquid container is about to flow out, and the warning lamp is changed into red.
Further, the air conditioner is provided with a fan,
wherein L is the liquid volume, V is the liquid flow rate, and delta t 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 allowance monitoring method based on the radio frequency signal, the traditional flow monitoring mostly depends on visual inspection, so that a large amount of labor cost is consumed, and working errors are easy to occur in a long-time working state, so that serious accidents are caused. In order to improve the intelligence of the monitoring process, compared with the method for monitoring the liquid residue by observing the liquid residue through visual inspection, the method for monitoring the liquid residue based on the radio frequency signal can thoroughly realize real-time induction and monitoring. And green, yellow and red three-level early warning can be established in monitoring, sufficient operation arrangement time is provided, and a more reasonable and perfect management mechanism is favorably established. The method is simple and efficient, and can effectively reduce workload and improve work efficiency.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
The device comprises a liquid container 1, a signal receiver 2, a top antenna 21, a bottom antenna 22, a support 3 and a signal transmitter 4.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Example (b): as shown in fig. 1, a method for monitoring a remaining amount of a liquid based on a radio frequency signal includes the following steps:
1) the method comprises the following steps that a signal receiver 2 is vertically arranged outside a liquid container 1 close to an 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 end antenna 21 of the signal receiver 2 is positioned in the middle of the liquid container 1, a bottom end 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 support 3, a signal transmitter 4 is hung on the other side of the upper end of the support 3, the signal transmitter 4 can also be integrally arranged in the support 3, and a warning lamp is arranged in a remote monitoring station;
2) the signal emitter 4 emits a signal to the signal receiver 2, because of the influence of liquid on electromagnetic waves, the signal emitter 4 cannot acquire a signal backscattered by the signal receiver 2, 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 signal and backscatter the signal, and the signal emitter 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 backscatter signal of the top antenna 21, and the warning light is green at this time, which indicates that the amount of liquid 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, at this time, the warning lamp turns yellow to indicate that the amount of liquid 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 received same signal is set as a default value;
when the liquid level is continuously lowered to expose the bottom antenna 22, the signal transmitter 4 can receive the back scattering signal of the bottom antenna 22, and the warning lamp turns red at the moment to indicate that the liquid amount in the liquid container 1 is about to flow out;
in step 3, the color of the warning lightThe principle of the change is as follows: the signal value data received by the signal transmitter 4 is set to SiTaking one signal value every y signal values,
wherein L is the liquid volume, V is the liquid flow rate, and Δ t is the emission interval time of the signal emitter, to obtain a new set of signal value data MxIf M isxEqual to the default value, is denoted by 1, if M isxNot equal to the default value, it is represented by 0, and a new set of data Q represented by 0 or 1 is obtainedx；
For new data QxSolving a first derivative by the following formula:
Pk＝Qh-Qh-1；
in the formula, h>1，P1＝Q1Dividing the derived data P into three classes according to 0, 1 or-1;
if P is 0, it represents that the signal value is not fluctuated; if P-1 or P-1, then signal value fluctuation is indicated;
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, the signal value is not fluctuated, 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 state that the top antenna 21 is exposed and the liquid is reduced to the state between the upper ends of the bottom antennas 22, the data P is changed from 0 to 1, then is changed to 0 and is continuously 0, which shows that the signal value fluctuates after the top antenna 21 is exposed, then the signal value is kept unchanged, at this moment, the liquid in the liquid container 1 is less than a half and is continuously reduced, and the warning lamp is changed to yellow;
after the liquid in the liquid container 1 is reduced to expose the bottom antenna, the data P is changed from 0 to-1, which indicates that the signal value fluctuates after the bottom antenna 22 is exposed, at this time, the liquid in the liquid container 1 is about to flow out, and the warning lamp is changed into red.
The specific type of the electronic element is not specially designated, and common products sold in the market can be selected as long as the use requirements of the electronic element can be met.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (6)
1. A liquid residual quantity monitoring method based on radio frequency signals is characterized by comprising the following steps:
1) a signal receiver (2) is vertically arranged outside the liquid container (1) close to the outlet, the liquid container (1) is hung on one side of the upper end of a support (3), a signal transmitter (4) is hung on the other side of the upper end of the support (3), and a warning lamp is arranged at a remote monitoring station;
2) the signal emitter (4) emits signals to the signal receiver (2), the signal emitter (4) cannot acquire backscattered signals of the signal receiver (2) due to the influence of liquid on electromagnetic waves, a top antenna (21) and a bottom antenna (22) of the signal receiver (2) receive the signals and backscatter the signals along with the continuous reduction of the liquid level in the liquid container (1), and the signal emitter (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) cannot receive the backscatter signal of the top antenna (21), and the warning lamp is green at the moment and indicates that the liquid amount in the liquid container (1) is sufficient;
when the liquid level continuously drops to the state that the top antenna (21) is exposed, the signal transmitter (4) can receive the back scattering signal of the top antenna (21), the warning lamp turns yellow at the moment, the liquid amount in the liquid container (1) is reduced by more than half, and when the liquid level continuously drops, the signal transmitter (4) continuously receives the back scattering signal of the top antenna (21), and the received same signal is set as a default value;
when the liquid level is continuously reduced to expose the bottom antenna (22), the signal transmitter (4) can receive the 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.
2. The method for monitoring the remaining amount of liquid based on radio frequency signals according to claim 1, wherein the signal receiver (2) is fixed by a worker near the outlet of the liquid container (1) or by a liquid manufacturer near the outlet of the liquid container (1) during the processing.
3. The method for monitoring the remaining amount of liquid based on radio frequency signals as claimed in claim 1, wherein 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 for monitoring the level of a liquid based on radio frequency signals according to claim 1, characterized in that the signal emitter (4) is also integrated in the holder (3).
5. The method for monitoring the remaining amount of liquid based on the radio frequency signal as claimed in claim 1, wherein the principle of the color change of the warning light in the step 3) is as follows: setting the signal value data received by the signal transmitter (4) as SiTaking one signal value every y signal values to obtain a new set of signal value data MxIf M isxEqual to the default value, is denoted by 1, if M isxNot equal to the default value, it is represented by 0, and a new set of data Q represented by 0 or 1 is obtainedx；
For new data QxSolving a first derivative by the following formula:
Pk＝Qh-Qh-1；
in the formula, h>1，P1＝Q1Dividing the derived data P into three classes according to 0, 1 or-1;
if P is 0, it represents that the signal value is not fluctuated; if P-1 or P-1, then signal value fluctuation is indicated;
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, the signal value is not fluctuated, 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 state that the top antenna (21) is exposed and in the process that the liquid is reduced to the state between the upper ends of the bottom antennas (22), the data P is changed from 0 to 1, then is changed to 0 and continues to be 0, which shows that the signal value fluctuates after the top antenna (21) is exposed, then the signal value keeps unchanged, at the moment, the liquid in the liquid container (1) is less than half and continues to be reduced, and the warning lamp is changed to yellow;
after the liquid in the liquid container (1) is reduced to expose the bottom antenna, the data P is changed from 0 to-1, which shows that the signal value fluctuates after the bottom antenna (22) is exposed, at this time, the liquid in the liquid container (1) is about to flow out, and the warning lamp is changed into red.
6. The method of claim 5, wherein the monitoring of the remaining amount of the liquid based on the RF signal,
wherein L is the liquid volume, V is the liquid flow rate, and delta t is the emission interval time of the signal emitter (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 CN114216535B (en) | 2024-05-03 |
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2021
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