JP6312222B2 - Liquid level sensing device - Google Patents

Description

  The present invention relates to a liquid level sensing device, and more particularly to a liquid level sensing device that automatically enhances a signal-to-noise ratio at a long distance.

FIG. 7 is a schematic diagram of a first embodiment of a liquid level sensing device according to the related art. One related art liquid level sensing device 50 is provided on one tank 40, and the tank 40 includes one material inlet 402 and one material outlet 404, and one measurement object 20 is placed in the tank 40. The liquid level sensing device 50 of the related technology emits one sensing signal 108 to the measurement target 20, and the sensing signal 108 comes into contact with the measurement target 20 to generate one reflected signal 110. reflects, liquid level sensing device 50 of the related art, the liquid of the reflected signal 110 one of the signal-to-noise ratio by receiving (signal to noise ratio) was measured and the measuring object 20 and the related art The distance to the position sensing device 50 is measured. The measurement object 20 is, for example, cereal, sandstone, or plastic grain, but is not limited thereto.

  Since the liquid level sensing device 50 of the related art as shown in FIG. 7 is not mounted horizontally, the reflected signal 110 is poor in quality and difficult to determine, and is shown in the upper waveform diagram in FIG. Will cause a detection error.

  FIG. 9 is a schematic diagram of a second embodiment of the liquid level sensing device according to the related art, and the description of the elements shown in FIG. 9 is similar to FIG. Then I will not give a luxury. Compared to the liquid level sensing device 50 of the related technology shown in FIG. 7, the liquid level sensing device 50 of the related technology shown in FIG. 9 is mounted horizontally, but the reflection surface of the measurement target 20 is not satisfactory. Since it is a definite geometric surface, it still tends to cause measurement errors as shown in the upper waveform diagram in FIG.

  FIG. 11 is a schematic diagram of a third embodiment of the liquid level sensing device according to the related art. The description of the elements shown in FIG. 11 is similar to FIG. The measurement object 20 shown in FIG. 11 is a sea or a river. As shown in FIG. 12, since the interference signal 114 is too large and the accurate reflected signal 110 is relatively small, a detection error is caused as shown in the upper waveform diagram in FIG.

  FIG. 13 is a radiation pattern diagram of the liquid level sensing device of the related art. The liquid level sensing device 50 of the related art has a relatively weak received signal 110 but a relatively low noise 116. The liquid level sensing device 50 of the related art is strong and has a wide beam angle and a wrong radiation angle, and the signal-to-noise ratio is only 5 dB.

  An object of the present invention is to provide a liquid level sensing device that automatically enhances the signal-to-noise ratio at a long distance in order to improve the above-mentioned drawbacks of the prior art.

To achieve the above object of the present invention, the liquid level sensing device that will be applied to the measurement object according to the present invention, there is provided a single sensing module, the sensing module, the one for the object to be measured A sensing signal is emitted, the sensing signal comes into contact with the object to be measured and reflects one reflected signal, and the sensing module receives the reflected signal and measures one noise signal to obtain the reflected signal. The ratio with the noise signal is called the signal-to-noise ratio, and the reflected signal is one sensing module used for measuring the distance to the measurement object and one far-end command receiving module, A far end command receiving module is electrically connected to the sensing module, and the far end command receiving module is connected to one far end command receiving module. A far-end command receiving module used to receive a command signal and at least one braking module, wherein a mechanism of the braking module is coupled to the sensing module, and the braking module is measured by the sensing module; The signal-to-noise ratio is a single feedback signal so that the signal-to-noise ratio can be maintained at a predetermined value or more , and the noise signal entering the sensing module is At least one braking module that is used to dynamically adjust the attitude of the braking module so as to suppress and to perform autonomous adjustment according to the reflected signal. The present invention automatically adjusts signal quality by a wireless or self-feedback mechanism.

It is a schematic diagram of the 1st Example of the liquid level sensing apparatus of this invention. It is a schematic diagram of the 2nd Example of the liquid level sensing apparatus of this invention. It is a schematic diagram of the 3rd Example of the liquid level sensing apparatus of this invention. It is a schematic flowchart of the open circuit control of this invention. It is a flowchart of one Example of the outline of closed circuit control of this invention. It is a flowchart of another one Example of the outline of the closed circuit control of this invention. It is a schematic diagram of the 1st Example of the liquid level sensing apparatus of related technology. In contrast waveform diagram of the first embodiment of the first embodiment of the liquid level sensing device of the related art and the liquid level sensing device of the present invention. It is a schematic diagram of the 2nd Example of the liquid level sensing apparatus of related technology. It is a contrast waveform figure of 2nd Example of the liquid level sensing apparatus of related technology, and 2nd Example of the liquid level sensing apparatus of this invention. It is a schematic diagram of the 3rd Example of the liquid level sensing apparatus of related technology. In contrast waveform diagram of a third embodiment of the third embodiment of the liquid level sensing device of the related art and the liquid level sensing device of the present invention. It is a radiation pattern figure of the liquid level sensing apparatus of related technology. It is a radiation pattern figure of the liquid level sensing apparatus of this invention.

  Detailed description and technical contents of the present invention will be described with reference to the following detailed description and drawings. The drawings and detailed description are for purposes of illustration only and are not intended to limit the invention.

FIG. 1 is a schematic view of a first embodiment of the liquid level sensing device of the present invention. One liquid level sensing device 10 is applied to one measurement object 20, one wireless far-end command emitting device 30, and one tank 40, and the signal-to-noise ratio is automatically set at the far distance. The strengthening liquid level sensing device 10 includes one sensing module 102, one far end command receiving module 104, and at least one braking module 106. The tank 40 includes one material inlet 402 and one material. The brake module 106 includes one protective mechanism 10602. The measurement object 20 shown in FIG. 1 may be, for example, cereal, sandstone, or plastic grain, but the present invention is not limited to these.

The sensing module 102 emits a single sensing signal 108 with respect to the measurement object 20, and the sensing signal 108 is brought into contact with the measurement object 20 reflects one of the reflected signal 110, the sensing module 102 receives the reflected signal 110 and measures one signal-to-noise ratio (Signal to Noise Ratio) and measures the height of the measurement object 20, and the far-end command receiving module 104 performs the sensing The far-end command receiving module 104 is electrically connected to the module 102 and wirelessly receives one far-end command signal 302 sent from the wireless far-end command emitting device 30. The braking module 106 performs autonomous adjustment in response to the reflected signal 110 so that the signal-to-noise ratio measured by the sensing module 102 can be maintained at one preset value. The preset value used for the purpose is an optimized signal-to-noise ratio. The far end command receiving module 104 may receive the far end command signal 302 by wire.

  The mechanism of the braking module 106 is connected to the sensing module 102, and the braking module 106 detects and calculates the sensing module 102 within a range of 360 degrees to obtain the optimal reflected signal 110. The sensing module 102 is used to adjust and dynamically follow the measurement object 20, and the braking module 106 is used to achieve the purpose of adjusting the sensing module 102, for example, a gear (FIG. 1). Not shown), rollers (not shown in FIG. 1), bearings (not shown in FIG. 1), bolts (not shown in FIG. 1), connection bars (not shown in FIG. 1) and motors (see FIG. 1). The structure of the present invention may be included, but the present invention is not limited to these.

  One signal range 112 indicates the radiation direction and substance material detection range of one antenna (not shown in FIG. 1) of the sensing module 102. The protection mechanism 10602 is used to protect the sensing module 102 so that the sensing module 102 is prevented from being damaged in a specific work environment. The power source of the braking module 106 may be, for example, a commercial power source, a battery, solar energy, wind energy, hydropower recovery, vibration recovery, or magnetoelectric effect recovery, but the present invention is not limited thereto. is not.

FIG. 8 is a comparison waveform diagram between the first embodiment of the liquid level sensing device of the related art and the first embodiment of the liquid level sensing device of the present invention. The lower waveform diagram in FIG. 8 is a waveform diagram of the first embodiment of the liquid level sensing device of the present invention. Compared to the upper waveform diagram in FIG. 8, the sensing module 102 of the present invention performs the measurement. The height of the object 20 can be accurately measured.

  The far-end command receiving module 104 may be one open circuit control (Open Loop Control) far-end command receiving module or one closed circuit control (Close Loop Control) far-end command receiving module. Explained.

  If the far-end command receiving module 104 is the open-circuit controlled far-end command receiving module, the signal-to-noise ratio is optimized in real time by one predetermined (Predetermined) adjustment method within one specific unit time. The reflected signal 110 is obtained. The predetermined adjustment method is a gesture pattern (Gesture Pattern) set in advance according to the process demand in the measurement environment, and changes according to the process demand.

  Alternatively, the predetermined adjustment method adopts a random and uncertain scanning method (Scanning Scheme) and is adjusted according to a specific setting mode (for example, the angle of the antenna is 10 degrees from an angle of 0 degrees according to a pattern). Or a mechanism for suppressing noise is built in).

FIG. 4 shows the above concept, FIG. 4 is a schematic flowchart of the open circuit control of the present invention, and FIG. 4 includes the following steps.
Step S02: A predetermined gesture pattern (Predetermined Gesture Pattern).
Step S04: Predetermined scanning scheme.
Step S06: The far end command receiving module 104 is controlled by an open circuit.
Step S08: The braking module 106 is adjusted.

  If the far-end command reception module 104 is the closed-circuit control far-end command reception module, the far-end command within the specific unit time is calculated as the signal-to-noise ratio within the specific unit time. By using one feedback signal as one reference value of the receiving module 104, the reflected signal 110 in which the signal-to-noise ratio is optimized in real time is obtained.

FIG. 5 shows the above concept, and FIG. 5 is a flowchart of one embodiment of the outline of the closed circuit control of the present invention. FIG. 5 includes the following steps.
Step T02: A command (Command) is started.
Step T04: The far end command receiving module 104 is controlled by a closed circuit.
Step T06: The braking module 106 is adjusted.
Step T08: The signal-to-noise ratio is set as the feedback signal.
Step T10: The feedback signal is used as feedback and command correction.

  In another specific embodiment, if the far-end command receiving module 104 is the closed-circuit controlled far-end command receiving module, it acquires one environmental trigger element within the specific unit time, and By using the feedback signal as the reference value of the far-end command receiving module within the specific unit time, the reflected signal in which the signal-to-noise ratio is optimized in real time is obtained. The environmental trigger element includes one external activation control input output (I / O) signal (eg, stirrer, heater, transfer device, tide alarm, personnel field input), one sensed analog signal (eg, high temperature Alarm, pressure overload) or digital signal of control interface.

FIG. 6 shows the above concept, FIG. 6 is a flowchart of another embodiment of the outline of the closed circuit control of the present invention, and FIG. 6 includes the following steps.
Step U02: A command (Command) is started.
Step U04: Control the far-end command receiving module 104 in a closed circuit.
Step U06: The braking module 106 is adjusted.
Step U08: The environment trigger element is set as the feedback signal.
Step U10: The feedback signal is used as feedback and command correction.

FIG. 2 is a schematic view of a second embodiment of the liquid level sensing device of the present invention. The description of the elements shown in FIG. 2 is similar to that of FIG. FIG. 2 shows that the braking module 106 adjusts the sensing module 102 to obtain the optimal reflected signal 110 and accurately measures the height of the measurement object 20.

FIG. 10 is a contrast waveform diagram of the second embodiment of the liquid level sensing device of the related art and the second embodiment of the liquid level sensing device of the present invention. The lower waveform diagram in FIG. 10 is a waveform diagram of the second embodiment of the liquid level sensing apparatus of the present invention. Compared to the upper waveform diagram in FIG. The height of the object 20 can be accurately measured.

FIG. 3 is a schematic view of a third embodiment of the liquid level sensing device of the present invention. The explanation of the elements shown in FIG. 3 is similar to that of FIGS. Further, the braking module 106 is adjusted such that the sensing module 102 acquires the lowest reflected background signal (Noise) or the angle of the emission wave (Beam Angle) of the sensing signal 108 is adjusted.

The measurement object 20 shown in FIG. 3 may be, for example, a sea or a river, but the present invention is not limited to these. Those liquid level sensing device 10 shown in the left of FIG. 3 is the same as the liquid level sensing device 10 to automatically enhance the signal-to-noise ratio in the far distance as shown in the right of FIG. 3, the difference is 3 The braking module 106 in the liquid level sensing device 10 that automatically enhances the signal-to-noise ratio at the far distance shown to the right of is adjusted. Compared to FIG. 11, in FIG. 3, some inaccurate (wasted) reflected signals 110 are shielded by the braking module 106 or reflected to other places.

FIG. 12 is a comparison waveform diagram between the third embodiment of the liquid level sensing device of the related art and the third embodiment of the liquid level sensing device of the present invention. The lower waveform diagram in FIG. 12 is a waveform diagram of the third embodiment of the liquid level sensing device of the present invention. Compared to the upper waveform diagram in FIG. The reflected signal 110 becomes relatively large, and the sensing module 102 of the present invention can accurately measure the height of the measurement object 20.

FIG. 14 is a radiation pattern diagram of the liquid level sensing device of the present invention. Those liquid level sensing device 10 is a relatively strong accurate the reflected signal 110 received, the noise 116 is relatively weak, and, automatically enhance the signal-to-noise ratio in the long distance liquid The position sensing device 10 has a narrow beam angle and a precise radiation angle, and the signal-to-noise ratio can even reach 40 dB.

Furthermore, measuring the height of the measurement object 20 may include, for example, two meanings, but the present invention is not limited to these.
1. If the measurement object 20 is left in the tank 40, measuring the height of the measurement object 20 means measuring the height of the liquid level of the measurement object 20.
2. If the measurement target 20 is the sea, measuring the height of the measurement target 20 indicates measuring the height of the sea level of the measurement target 20 (that is, the height above sea level). .

The present invention automatically adjusts signal quality by a wireless or self-feedback mechanism, and the present invention includes at least the following advantages.
1. The signal to noise ratio is automatically optimized.
2. The radiation pattern is optimized.
3. Remote control (automatic feedback) wirelessly.
4). Resolve an environment where humans cannot operate in the field.
5. Reduce the risk of human operation.
6. Continuous scanning in the 360 degree range (Radar data for 3D development of tanks can be realized).

  However, the above descriptions are merely preferred embodiments of the present invention, and the scope of the present invention cannot be limited, that is, equivalent changes and modifications based on the claims of the present invention. All belong to the scope protected by the patent of the present invention.

10 liquid level sensing device 20 measurement object 30 wireless far end command emitting device 40 tank 50 liquid level sensing device 102 of related technology sensing module 104 far end command receiving module 106 braking module 108 sensing signal 110 reflected signal 112 signal range 114 interference signal 116 Noise 302 Far-end command signal 402 Material inlet 404 Material outlet 10602 Protection mechanism S02-08 Step T02-10 Step U02-10 Step

Claims (8)

In liquid level sensing device that will be applied to the measurement object,
The sensing module emits one sensing signal to the measurement object, the sensing signal contacts the measurement object and reflects one reflected signal, and the sensing module The module receives the reflected signal and measures one noise signal, and the ratio between the reflected signal and the noise signal is referred to as a signal-to-noise ratio, and the reflected signal is a distance of the object to be measured. One sensing module used for measurement ,
A far-end command receiving module, wherein the far-end command receiving module is electrically connected to the sensing module, and the far-end command receiving module is used to receive one far-end command signal; One far-end command receiving module;
And at least one brake module, mechanism of the braking module is connected to the sensing module, maintains the brake module, or exceeds the signal-to-noise ratio measured is set one in advance by the sensing module The signal-to-noise ratio as a single feedback signal, and dynamically adjusting the position of the braking module so as to suppress the noise signal entering the sensing module, and the reflection At least one braking module used to make autonomous adjustments in response to the signal;
A liquid level sensing device comprising: The brake module, wherein as sensing module to obtain an optimal reflection signal, the liquid level sensing according to claim 1 which is used to adjust the sensing module to dynamically follow the above-mentioned measurement target apparatus. The liquid level sensing device according to claim 1, wherein the braking module is used to dynamically follow the measurement object by adjusting the sensing module so that the sensing module obtains the lowest noise signal. . 3. The braking module according to claim 2, wherein the braking module includes a single protection mechanism, and the protection mechanism is used to protect the sensing module so that the sensing module is prevented from being damaged in a specific work environment. Liquid level sensing device. The far-end command receiving module is used for wirelessly receiving the far-end command signal, and the power source of the braking module is commercial power source, battery, solar energy, wind energy, hydraulic power recovery, vibration recovery or magnetoelectric recovery. The liquid level sensing device according to claim 1. The far-end command receiving module, in one single specific time unit, according to claim 1 in which the signal-to-noise ratio by adjusting the angle of the antenna provided on the sensing module to obtain the reflected signal which is optimized for real-time Liquid level sensing device according to 1. The liquid level sensing device, in one particular unit time, the signal-to-noise ratio, and one of the feedback signal shall be the reference value of the far-end command receiving module in the following of the specific unit time The liquid level sensing device according to claim 1, wherein the reflected signal having a signal-to-noise ratio optimized in real time is obtained. Wherein the liquid level sensing device, in one specific time unit, to obtain a single high temperature alarm shall be the one reference value of the far-end command receiving module in the following of the specific unit of time off with fed back signals, the liquid level sensing device of claim 1, the signal-to-noise ratio is obtained the reflected signal which is optimized in real time.

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