CN214150555U - Liquid security check identification device - Google Patents
Liquid security check identification device Download PDFInfo
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- CN214150555U CN214150555U CN202023032509.4U CN202023032509U CN214150555U CN 214150555 U CN214150555 U CN 214150555U CN 202023032509 U CN202023032509 U CN 202023032509U CN 214150555 U CN214150555 U CN 214150555U
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Abstract
The utility model relates to a liquid safety inspection recognition device belongs to liquid safety inspection technical field, has solved the problem that can not high-efficient, the accurate liquid safety inspection discernment that carries on among the prior art. The utility model discloses a: the device comprises an indicating device, a material placing area, an ultrasonic detection device, a dielectric constant detection device, a processor and a linear displacement sensor; the ultrasonic detection device comprises an ultrasonic transmitting circuit and an ultrasonic transmitting probe which are electrically connected, and an ultrasonic receiving circuit and an ultrasonic receiving probe which are electrically connected; the dielectric constant detection device comprises an alternating current excitation source and a dielectric constant detection probe which are electrically connected; the processor is electrically connected with the indicating device, the ultrasonic detection device, the dielectric constant detection device and the linear displacement sensor, and the ultrasonic transmitting probe, the ultrasonic receiving probe and the dielectric constant detection probe are arranged close to the container wall in a detection state. The safety inspection and identification of the liquid are realized.
Description
Technical Field
The utility model relates to a liquid safety inspection technical field especially relates to a liquid safety inspection recognition device.
Background
In recent years, in the field of security inspection, there is an increasing demand for identification of risks of liquids carried by citizens, and the range of liquids to be identified is also increasing for detection of liquids in non-metal containers or metal containers.
Various dangerous liquid detectors are generally applied to the market, but with higher and higher requirements on dangerous liquid detection, the range of the detected dangerous liquid is wider and wider, the current dangerous liquid detector is difficult to meet the requirements of customers, and a small number of specific dangerous liquids have higher false alarm rate or false missing report rate.
Therefore, the prior art lacks a device capable of efficiently and accurately performing liquid security check identification.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention aims to provide a liquid security inspection recognition apparatus for solving the problem in the prior art that the liquid security inspection recognition cannot be performed efficiently and accurately.
The purpose of the utility model is mainly realized through the following technical scheme:
a liquid security check identification device, comprising: the device comprises an indicating device, a material placing area, an ultrasonic detection device, a dielectric constant detection device, a processor and a linear displacement sensor;
the object placing area is used for placing a container filled with liquid to be detected;
the ultrasonic detection device comprises an ultrasonic transmitting circuit and an ultrasonic transmitting probe which are electrically connected, and an ultrasonic receiving circuit and an ultrasonic receiving probe which are electrically connected;
the dielectric constant detection device comprises an alternating current excitation source and a dielectric constant detection probe, wherein the alternating current excitation source is electrically connected with the dielectric constant detection probe;
the processor is electrically connected with the indicating device, the ultrasonic detection device, the dielectric constant detection device and the linear displacement sensor;
and when in a detection state, the ultrasonic transmitting probe, the ultrasonic receiving probe and the dielectric constant detection probe are arranged close to the container wall.
Further, the linear displacement sensor is placed in the width direction of the detection groove and used for detecting the measurement width of the container placed in the detection groove.
Further, the linear displacement sensor, the ultrasonic transmitting probe and the ultrasonic receiving probe are arranged in a linkage mode.
Further, the linear displacement sensor comprises a resistance element and a sliding contact, and the ultrasonic receiving probe drives the sliding contact to move when moving.
Furthermore, the dielectric constant detection probe comprises a plurality of plate-shaped capacitive sensing electrodes which are arranged in parallel on the same plane, gaps among the plate-shaped capacitive sensing electrodes are the same, and the plate-shaped capacitive sensing electrodes are arranged close to the surface of the container in a detection state.
Further, still include: and the temperature sensor is tightly attached to the wall of the container and used for detecting the temperature of the container.
Further, the alternating current excitation source is a sine wave excitation source.
Furthermore, the object placing area is also provided with a trigger device, and the trigger device drives the linear displacement sensor, the ultrasonic transmitting probe and the ultrasonic receiving probe to be attached to the wall of the container.
Further, the plate-shaped capacitive sensing electrode includes at least one transmitting electrode and a plurality of receiving electrodes.
Further, the indicating device is a buzzer, a display screen, a vibrating device and/or an indicating lamp.
Compared with the prior art, the utility model discloses following beneficial effect can be realized:
the liquid security inspection identification device based on dielectric constant and ultrasonic detection adopts the technical scheme that the dielectric constant detection and the ultrasonic detection are combined with each other, and the dielectric constant detection technology mainly detects the dangerous liquid which has obvious difference with water in the dielectric constant and is easy to distinguish; the liquid safety inspection identification device assisted by the ultrasonic detection device can distinguish dangerous liquid with similar dielectric constant and different density and water from water, so that the liquid detection accuracy and detection efficiency are greatly improved.
The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a diagram showing a connection of a liquid security inspection device according to an embodiment;
FIG. 2 is a diagram of an ultrasonic testing device according to an embodiment;
FIG. 3 is a diagram illustrating the connection of a dielectric constant measuring device according to an embodiment;
FIG. 4 is a schematic diagram of a plate-shaped capacitive sensing electrode of a permittivity detection probe in an embodiment of a permittivity detection apparatus;
reference numerals:
10-linear displacement sensor; 20-ultrasonic detection means; 30-a dielectric constant detection device; 40-a processor; 50-an indication device; 201-ultrasonic wave transmitting circuit; 202-ultrasonic emission probe; 203-ultrasonic receiving circuit; 204-ultrasonic receiving probe; 301-dielectric constant detection probe; 302-ac excitation source.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.
Through a great deal of research and experiments of the inventor, the dielectric constant method can be used for detecting the liquid, but in the actual test, because dangerous liquid close to the dielectric constant of water exists, the dielectric constant detection is mistaken for safe liquid, and the dangerous liquid alarm is not carried out. Therefore, the ultrasonic detection method is adopted for auxiliary test and is used for distinguishing liquids with similar dielectric constant to water and different densities and water, so that the problem that dangerous liquid detection with the dielectric constant similar to the dielectric constant of water cannot be effectively carried out is solved.
The utility model discloses a concrete embodiment discloses a liquid safety inspection recognition device carries out the detailed description, as shown in FIG. 1, include: an indicating device 50, an object area, an ultrasonic detection device 20, a dielectric constant detection device 30, a processor 40 and a linear displacement sensor 10.
The processor 40 is electrically connected to the pointing device 50, the ultrasonic detection device 20, the dielectric constant detection device 30, and the linear displacement sensor 10.
Specifically, the ultrasonic detection device 20 includes an ultrasonic transmission circuit 201 and an ultrasonic transmission probe 202 that are electrically connected, and an ultrasonic reception circuit 203 and an ultrasonic reception probe 204 that are electrically connected.
The linear displacement sensor 10 is placed in the width direction of the detection tank, and is used for detecting the measurement width of the container placed in the detection tank. As shown in fig. 2, the linear displacement sensor 10, the ultrasonic transmission probe 202, and the ultrasonic reception probe 204 are provided in an interlocking manner; the linear displacement transducer 10 includes a resistive element and a sliding contact that moves when the ultrasonic receiving probe 204 moves.
Specifically, the measurement width is an actual width detected by the liquid recognition device at the placement area, and the ultrasonic wave transmission probe 202 and the ultrasonic wave reception probe 204 transmit and receive ultrasonic waves in the measurement width direction at the predetermined position. Namely: the measurement width is the width between the ultrasonic transmission probe 202 and the ultrasonic reception probe 204, and is not limited to the maximum width of the container, and the shape of the container is not necessarily limited.
Specifically, as shown in fig. 3, the permittivity detection device 30 includes an ac excitation source 302 and a permittivity detection probe 301, the ac excitation source 302 and the permittivity detection probe 301 are electrically connected, the permittivity detection probe 301 includes a plurality of plate-like capacitance sensing electrodes arranged in parallel on the same plane, gaps between the plate-like capacitance sensing electrodes are the same, and the plate-like capacitance sensing electrodes are disposed in close contact with the surface of the container in the detection state. The ac excitation source 302 is a sine wave excitation source. The plate-shaped capacitive sensing electrode includes at least one transmitting electrode and a plurality of receiving electrodes, and optionally, as shown in fig. 4, the plate-shaped capacitive sensing electrode includes emitters T1 to T2 and receivers R1 to R5.
Specifically, in the detection state, the ultrasonic transmission probe 202, the ultrasonic reception probe 204, and the dielectric constant detection probe 301 are disposed in close contact with the container wall.
Optionally, the object area is further provided with a triggering device which drives the linear displacement sensor 10, the ultrasonic wave transmitting probe 202, the ultrasonic wave receiving probe 204 and the dielectric constant detecting probe 301 against the wall of the container.
Preferably, the method further comprises the following steps: and the temperature sensor is tightly attached to the wall of the container and used for detecting the temperature of the container. The processor 40 calculates the propagation speed of the ultrasonic wave in the liquid to be measured at the container temperature according to the detected container temperature, the detected container measurement width and the transmitting and receiving time difference of the ultrasonic wave in the container measurement width direction, and determines whether the liquid to be measured meets the second safety condition by comparing the propagation speed of the ultrasonic wave in the liquid to be measured at the container temperature with the pre-stored ultrasonic propagation speed at the same temperature.
Optionally, the indicating device 50 is a buzzer, a display screen, a vibrating device and/or an indicator light.
When in implementation, the object placing area is used for placing a container filled with liquid to be tested; the linear displacement sensor 10, the ultrasonic transmitting probe 202 and the ultrasonic receiving probe 204 are linked to detect the measurement width of a container filled with liquid to be measured;
the ultrasonic transmitting circuit 201 drives the ultrasonic transmitting probe 202 to emit ultrasonic waves under the control of the processor 40; the ultrasonic receiving probe 204 converts the ultrasonic signal into an electric signal, the ultrasonic receiving circuit 203 processes the electric signal, and transmits the processed data to the processor 40; the processor 40 calculates a difference in transmission/reception time of the ultrasonic waves in the container measurement width direction from the acquired ultrasonic wave transmission and ultrasonic wave reception signals.
The dielectric constant detection probe 301 is attached to the surface of the container in a detection state, and the alternating current excitation source 302 is a sine wave excitation source and is used for detecting the dielectric constant of the liquid to be detected.
The processor 40 determines whether the liquid to be detected meets the first safety condition by comparing the dielectric constant of the liquid to be detected with the dielectric constant of the liquid stored in advance, and controls the indicating device 50 to send alarm information if the liquid to be detected does not meet the first safety condition; if the liquid to be measured meets the first safety condition, calculating the propagation speed of the ultrasonic wave in the liquid to be measured according to the measurement width of the container and the transceiving time difference of the ultrasonic wave in the measurement width direction of the container, determining whether the liquid to be measured meets the second safety condition by comparing the propagation speed of the ultrasonic wave in the liquid to be measured with the prestored ultrasonic propagation speed, and if the liquid to be measured does not meet the second safety condition, controlling the indicating device 50 to send out alarm information.
Hereinafter, a specific operation of the liquid security check recognition apparatus will be described:
after a container filled with liquid to be detected is placed in the material placing area, a trigger device is arranged, the liquid security inspection recognition device enters a detection state, the ultrasonic receiving probe 204 drives the sliding contact to move when moving, and the electrical constant detection probe 301, the ultrasonic transmitting probe 202 and the ultrasonic receiving probe 204 are tightly attached to the surface of the container; the linear displacement sensor 10 detects the measuring width of the container placed in the detection groove in the width direction of the detection groove; the dielectric constant detection device 30 detects the dielectric constant of the liquid to be detected; the ultrasonic detection device 20 detects a difference in transmission/reception time of ultrasonic waves in the container measurement width direction.
The processor 40 calculates the dielectric constant of the liquid according to the acquired data of the dielectric constant detection device 30; the propagation velocity of the ultrasonic wave in the liquid is calculated from the acquired difference in the transmission/reception time in the container measurement width direction of the ultrasonic detection device 20 and the container measurement width detected by the linear displacement sensor 10. Determining whether the liquid to be detected meets a first safety condition by comparing the dielectric constant of the liquid to be detected with a prestored liquid dielectric constant, and controlling the indicating device 50 to send alarm information if the liquid to be detected does not meet the first safety condition; if the liquid to be detected meets the first safety condition, determining whether the liquid to be detected meets the second safety condition or not by comparing the propagation speed of the ultrasonic wave in the liquid to be detected with the prestored ultrasonic propagation speed according to the propagation speed of the ultrasonic wave in the liquid to be detected, and if the liquid to be detected does not meet the second safety condition, controlling the indicating device 50 to send out alarm information.
Specifically, the first safety condition is that the dielectric constant of the liquid to be measured is matched with the dielectric constant of the pre-stored safety liquid, and the second safety condition is that the propagation speed of the ultrasonic wave in the liquid to be measured is matched with the propagation speed of the pre-stored ultrasonic wave in the safety liquid. For example, gasoline has a dielectric constant of 2, methanol has a dielectric constant of 33.7, water has a dielectric constant of 81.5, and sulfuric acid has a dielectric constant of 84; gasoline and methanol can be effectively distinguished through the first safety condition, so that dangerous liquid alarming is carried out, the dielectric constants of water and sulfuric acid are close, so that the dielectric constant detection device 30 cannot effectively distinguish, the second safety condition is entered, the propagation speed of ultrasonic waves in water is 1490m/s, the propagation speed of ultrasonic waves in sulfuric acid is 1232m/s, so that the speed of the ultrasonic waves in the liquid to be detected is judged, when the sulfuric acid is detected, the propagation speed is 1232m/s, the second safety condition is not met, and the control and indication device 50 sends out alarm information.
The data fluctuation range required by the liquid security inspection identification device is in millimeter level, the shortest transmission distance is required to be more than or equal to 3cm, and the ultrasonic frequency is preferably 40 KHz.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. A liquid security inspection identification device, comprising: the device comprises an indicating device, a material placing area, an ultrasonic detection device, a dielectric constant detection device, a processor and a linear displacement sensor;
the object placing area is used for placing a container filled with liquid to be detected;
the ultrasonic detection device comprises an ultrasonic transmitting circuit and an ultrasonic transmitting probe which are electrically connected, and an ultrasonic receiving circuit and an ultrasonic receiving probe which are electrically connected;
the dielectric constant detection device comprises an alternating current excitation source and a dielectric constant detection probe, wherein the alternating current excitation source is electrically connected with the dielectric constant detection probe;
the processor is electrically connected with the indicating device, the ultrasonic detection device, the dielectric constant detection device and the linear displacement sensor;
and when in a detection state, the ultrasonic transmitting probe, the ultrasonic receiving probe and the dielectric constant detection probe are arranged close to the container wall.
2. The liquid security inspection recognition device according to claim 1, wherein the linear displacement sensor is disposed in a width direction of the inspection slot for detecting a measured width of the container disposed in the inspection slot.
3. The liquid security inspection recognition device of claim 1, wherein the linear displacement sensor, the ultrasonic transmission probe and the ultrasonic reception probe are arranged in a linkage manner.
4. The liquid security inspection identification device according to claim 3, wherein the linear displacement sensor comprises a resistance element and a sliding contact, and the ultrasonic receiving probe moves to drive the sliding contact to move.
5. The liquid security inspection and identification device of claim 1, wherein the dielectric constant detection probe comprises a plurality of plate-shaped capacitive sensing electrodes arranged in parallel on the same plane, and gaps between the plate-shaped capacitive sensing electrodes are the same and are arranged to be close to the surface of the container in the detection state.
6. The liquid security inspection identification device according to claim 1, further comprising: and the temperature sensor is tightly attached to the wall of the container and used for detecting the temperature of the container.
7. The liquid security inspection identification device of claim 1, wherein the ac excitation source is a sine wave excitation source.
8. The liquid security inspection identification device of claim 3, wherein the object area is further provided with a triggering device, and the triggering device drives the linear displacement sensor, the ultrasonic transmitting probe and the ultrasonic receiving probe to be close to the wall of the container.
9. The liquid security inspection identification device of claim 5, wherein the plate-like capacitive sensing electrode comprises at least one transmitting electrode and a plurality of receiving electrodes.
10. The liquid security inspection recognition device of claim 1, wherein the indication device is a buzzer, a display screen, a vibrating device and/or an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023032509.4U CN214150555U (en) | 2020-12-16 | 2020-12-16 | Liquid security check identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023032509.4U CN214150555U (en) | 2020-12-16 | 2020-12-16 | Liquid security check identification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214150555U true CN214150555U (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023032509.4U Active CN214150555U (en) | 2020-12-16 | 2020-12-16 | Liquid security check identification device |
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| Country | Link |
|---|---|
| CN (1) | CN214150555U (en) |
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- 2020-12-16 CN CN202023032509.4U patent/CN214150555U/en active Active
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