Near-field ultrasonic detection device and near-field ultrasonic detection system

Abstract

To provide a short-range ultrasonic detection apparatus and a short-range ultrasonic detection system in which a dead zone is narrow and cost is reduced.SOLUTION: An ultrasonic receiving module receives an ultrasonic reflected signal generated by the reflection of an ultrasonic signal, converts the signal into a reflected signal, and outputs the signal. The receiving angle of the ultrasonic receiving module is from 2 degrees to 10 degrees. An amplification circuit is electrically connected to the ultrasonic receiving module and a microprocessor, receives the reflected signal, amplifies the reflected signal into a detection signal, and transmits the detection signal again to the microprocessor. The microprocessor generates a sensing result based on the detection signal. The frequencies of the ultrasonic signal and the ultrasonic reflected signal are from 500KHz to 1.2 MHz, and the detection distance of an ultrasonic sensing assembly is from 0.2 centimeters to 8 centimeters.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to the field of circuit board sensing, and in particular to a short-range ultrasonic sensing device and a short-range ultrasonic sensing system. [Background technology]

[0002] There are various methods for detecting objects, such as using light passing / blocking, reflection / absorption, magnetic induction, etc. to confirm or identify them. From the viewpoint of optical recognition, conventional barcodes and QR codes (registered trademark) mainly use optical scanners to illuminate the barcode with a unique light source. Then, a photoelectric converter receives the reflected light and converts the brightness of the reflected light into a digital signal. Summary of the Invention [Problem to be solved by the invention]

[0003] However, tight spaces or materials that are themselves highly reflective or transmissive limit the opportunities for using bar codes.

[0004] Regarding magnetic induction, short-distance wireless communication such as radio-frequency identification (RFID) is being used for sensing, and the range of applications will be further expanded. However, compared to conventional barcodes, RFID requires an antenna and a chip, so the overall cost is relatively high. [Means for solving the problem]

[0005] In view of the above problems, the present invention has the following configuration: That is, one aspect of the present invention is a short-distance ultrasonic detection device including a microprocessor that generates and outputs a control signal, and an ultrasonic sensing assembly, the ultrasonic sensing assembly having a boost circuit, an ultrasonic transmission module, an ultrasonic reception module, and an amplifier circuit, the boost circuit is electrically connected to the microprocessor, receives the control signal, and boosts the control signal to a drive signal, the ultrasonic transmission module is electrically connected to the boost circuit, receives the drive signal, and generates and outputs an ultrasonic signal, the emission angle of the ultrasonic transmission module is 2 degrees to 10 degrees, and the ultrasonic reception module is an ultrasonic wave generated by reflection of the ultrasonic signal. a receiving angle of the ultrasonic receiving module ranging from 2 degrees to 10 degrees; the amplifier circuit is electrically connected to the ultrasonic receiving module and the microprocessor, receives the reflected signal, amplifies the reflected signal to generate a detection signal, and transmits the signal again to the microprocessor, which generates a sensing result based on the detection signal; a frequency of the ultrasonic signal and the ultrasonic reflected signal is between 500 KHz and 1.2 MHz; and a detection distance of the ultrasonic sensing assembly is between 0.2 centimeters and 8 centimeters.

[0006] In the above aspect, the ultrasonic transmitting module, the ultrasonic receiving module, the boost circuit, and the amplifier circuit may be packaged on the same wafer.

[0007] In the above aspect, the ultrasonic transmitting module and the ultrasonic receiving module may each have at least one piezoelectric ultrasonic sensor.

[0008] In the above aspect, the ultrasonic transmitting module and the ultrasonic receiving module may each have a plurality of piezoelectric ultrasonic sensors, and the plurality of piezoelectric ultrasonic sensors may be arranged in an array.

[0009] In the above aspect, the frequency of the ultrasonic signal and the ultrasonic reflected signal is 600 KHz to 800 KHz. K Hz, the emission angle and the reception angle may be from 3 degrees to 5 degrees, and the detection distance of the ultrasonic sensing assembly may be from 0.3 centimeters to 3 centimeters.

[0010] Another aspect of the present invention is a short-range ultrasonic detection system including a short-range ultrasonic detection device, a detection object, a database, and a CPU, the short-range ultrasonic detection device having a microprocessor and an ultrasonic sensing assembly, the microprocessor generating and outputting a control signal, the ultrasonic sensing assembly having a boost circuit, an ultrasonic transmission module, an ultrasonic reception module, and an amplifier circuit, the boost circuit being electrically connected to the microprocessor to receive a control signal and boost the control signal to a drive signal, the ultrasonic transmission module being electrically connected to the boost circuit to receive the drive signal, generating and outputting an ultrasonic signal, the emission angle of the ultrasonic transmission module being 2 degrees to 10 degrees, the ultrasonic reception module receiving an ultrasonic reflected signal generated by reflection of the ultrasonic signal, converting the ultrasonic reflected signal into a reflected signal and outputting it, the reception angle of the ultrasonic reception module being 2 degrees to 10 degrees, the amplifier circuit being a width circuit electrically connected to the ultrasonic receiving module and the microprocessor, receiving the reflected signal, amplifying the reflected signal to generate a detection signal, and transmitting it again to the microprocessor, and the microprocessor generating a sensing result based on the detection signal; the frequency of the ultrasonic signal and the ultrasonic reflected signal is 500KHz to 1.2MHz; the object to be sensed has a sensing tag, the sensing tag has a radio wave attenuation section and a radio wave reflecting section, the ultrasonic signal generates the ultrasonic reflected signal after being reflected by the sensing tag; the detection distance between the short-range ultrasonic detection device and the object to be sensed is 0.2 centimeters to 8 centimeters; and the CPU activates the microprocessor based on an operation command to generate the control signal, and accesses data in the database for comparison based on the sensing result of the short-range ultrasonic detection device.

[0011] In the above aspect, the ultrasonic transmitting module and the ultrasonic receiving module may each include at least one piezoelectric ultrasonic sensor.

[0012] In the above aspect, the ultrasonic transmitting module and the ultrasonic receiving module may each have a plurality of piezoelectric ultrasonic sensors, and the piezoelectric ultrasonic sensors may be arranged in an array.

[0013] In the above aspect, the frequency of the ultrasonic signal and the ultrasonic reflected signal is 600 KHz to 800 KHz. K Hz, the emission angle and the reception angle may be from 3 degrees to 5 degrees, and the detection distance of the ultrasonic sensing assembly may be from 0.3 centimeters to 3 centimeters.

[0014] In the above aspect, the radio wave attenuation portion of the sensing tag may be a wave attenuating coating, a wave scattering coating, or a radio wave absorbing material. Effect of the Invention

[0015] The present invention provides a low-cost short-range ultrasonic detection device and a short-range ultrasonic detection system with a narrow dead zone, since the emission angle of the ultrasonic transmitting module is 2 degrees to 10 degrees, the reception angle of the ultrasonic receiving module is 2 degrees to 10 degrees, the frequency of the ultrasonic signal and the ultrasonic reflected signal is 500KHz to 1.2MHz, and the detection distance of the ultrasonic sensing assembly is 0.2 centimeters to 8 centimeters. [Brief description of the drawings]

[0016] [Figure 1] 1 is a block diagram of a short-range ultrasonic detection device according to an embodiment of the present invention; [Diagram 2] 1 is a block diagram of a short-range ultrasonic detection system according to an embodiment of the present invention; [Diagram 3] FIG. 2 is an image diagram of a sensing tag in one embodiment of the present invention. [Figure 4] 1 is a diagram showing an application example of a short-distance ultrasonic detection system according to an embodiment of the present invention. [Diagram 5] FIG. 5 is a diagram showing an application example of a short-distance ultrasonic detection system different from that shown in FIG. 4. [Figure 6] 6 is a diagram showing an application example of another short-distance ultrasonic detection system different from that shown in FIG. 4 and FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In the present invention, when an element is described as being "disposed" on another element, it may mean that the element is directly disposed on the other element, or it may mean that the element is disposed via an intermediate element. However, when an element is specifically described as being "disposed directly" on another element, there are no intermediate elements present.

[0018] Fig. 1 is a block diagram of a short-range ultrasonic detection device. As shown in Fig. 1, the short-range ultrasonic detection device 1 includes a microprocessor 10 and an ultrasonic sensing assembly 20. The microprocessor 10 generates and outputs a control signal C. The ultrasonic sensing assembly 20 includes a boost circuit 21, an ultrasonic transmitting module 23, an ultrasonic receiving module 25, and an amplifier circuit 27.

[0019] The boost circuit 21 is electrically connected to the microprocessor 10 and receives a control signal C. The boost circuit 21 boosts the control signal C to a drive signal D. The ultrasonic transmission module 23 is electrically connected to the boost circuit 21 and receives the drive signal D to generate and output an ultrasonic signal Ut. The emission angle of the ultrasonic transmission module 23 is 2 degrees to 10 degrees.

[0020] The ultrasonic receiving module 25 receives an ultrasonic reflected signal Ur generated by reflection of the ultrasonic signal Ut, converts it into a reflected signal R, and outputs it. The receiving angle of the ultrasonic receiving module 25 is from 2 degrees to 10 degrees. Here, the ultrasonic reflected signal Ur is mainly converted into an electrical signal.

[0021] The amplifier circuit 27 is electrically connected to the ultrasonic receiving module 25 and the microprocessor 10, receives the reflected signal R, amplifies it to a detection signal S, and transmits it to the microprocessor 10. The microprocessor 10 generates a sensing result Rt based on the detection signal S.

[0022] The frequency of the ultrasonic signal Ut and the ultrasonic reflected signal Ur is 500 KHz to 1.2 MHz. The detection distance of the ultrasonic sensing assembly 20 is 0.2 to 8 centimeters. Preferably, in this embodiment, the frequency of the ultrasonic signal Ut and the ultrasonic reflected signal Ur is 600 KHz to 800 KHz. K Hz, and the emission and reception angles are 3 to 5 degrees. The detection distance of the ultrasonic sensing assembly 20 is 0.3 to 3 centimeters.

[0023] In the existing technology, ultrasonic sensing assemblies are not only used for fingerprint sensing, but also for vehicle distance sensing. However, the distance of 1 cm to 5 cm is usually considered to be the dead zone (area where detection is difficult) for ultrasonic detection devices. However, by setting the frequency of ultrasonic to 600KHz to 800KHz, K Hz and limiting the emission and reception angles to 3 to 5 degrees makes close-range sensing efficient.

[0024] In this embodiment, the ultrasonic transmitting module 23, the ultrasonic receiving module 25, the boost circuit 21, and the amplifier circuit 27 are packaged on the same chip. However, this is merely an example of miniaturization and is not intended to limit the technical scope of this embodiment. For example, the ultrasonic transmitting module 23 and the boost circuit 21 may be packaged on the same chip, and the ultrasonic receiving module 25 and the amplifier circuit 27 may be packaged using another chip.

[0025] 1 again, in this embodiment, the ultrasonic transmitting module 23 and the ultrasonic receiving module 25 each have at least one piezoelectric ultrasonic sensor 235, 255. Here, there are two piezoelectric ultrasonic sensors 235, 255, and the piezoelectric ultrasonic sensors 235, 255 are arranged in an array as an example. However, the actual number or configuration can be adjusted according to the actual needs of the product.

[0026] Fig. 2 is a block diagram of a short-range ultrasonic detection system. As shown in Fig. 2, a short-range ultrasonic detection system 100 is provided. The short-range ultrasonic detection system 100 includes a short-range ultrasonic detection device 1, a detection target 3, a database 5, and a CPU 7.

[0027] The detailed structure of the short-distance ultrasonic detection device 1 can be seen in Fig. 1, and will not be described again here. The CPU 7 in Fig. 2 transmits an actuation signal E in response to an operation command A to activate the microprocessor 10 (Fig. 1) and generate a control signal C.

[0028] The sensing tag 31 is provided on the sensing object 3. The sensing tag 31 has a radio wave attenuating section 311 and a radio wave reflecting section 313, as shown in FIG.

[0029] When the ultrasonic signal Ut output by the ultrasonic transmitting module 23 in Fig. 1 is reflected by the sensing tag 31, an ultrasonic reflected signal Ur is generated. The ultrasonic receiving module 25 can form sections of different reflection strength in the ultrasonic reflected signal Ur based on the radio wave attenuation section 311 and the radio wave reflecting section 313 in Fig. 3, and converts the reflection strength into a digital reflected signal.

[0030] 2, the CPU 7 accesses and compares data in the database 5 based on the sensing result Rt of the short-range ultrasonic detection device 1, and identifies the sensing object 3, or executes a corresponding operation command based on the analysis of the sensing object 3. Here, the detection distance between the short-range ultrasonic detection device 1 and the sensing object 3 is 0.2 to 8 cm.

[0031] Fig. 3 is an image diagram of a sensing tag. Fig. 3 uses a general barcode as the sensing tag 31, but this is merely an example and is not limiting. As another example, it can be displayed in the form of a QR code (registered trademark).

[0032] 3, a radio wave attenuating portion 311 and a radio wave reflecting portion 313 are printed on the barcode sensing tag 31. The purpose of the radio wave attenuating portion 311 is to significantly attenuate the intensity of the ultrasonic reflection signal Ur corresponding to this region.

[0033] For example, the ultrasonic signal Ut can pass through radio wave absorbing materials such as cloth, wool, sponge, radio wave attenuation coating, reflective material, etc., and when the ultrasonic signal Ut comes into contact with the ultrasonic receiving module 25 in Fig. 1, the intensity is reduced or the signal is reflected at an angle that exceeds the angle at which it can be received. An appropriate material can be selected according to the object 3 to be sensed, and the material of the sensing tag 31 can be selected.

[0034] 4 to 6 are schematic diagrams showing different application embodiments of the short-distance ultrasonic detection system. Hereinafter, application examples of various implementation methods of the short-distance ultrasonic detection system 100 will be introduced. As shown in FIG. 4, the short-distance ultrasonic detection system 100 can be applied to a hotel door card overvoltage system. The object to be detected 3 is a room card.

[0035] In the conventional power supply system, for example, when using a hotel, the light is cut off through the room card, and power is supplied to the room in response to this. In addition, many travelers insert their ID or credit card to maintain power after going out for convenience, which not only leads to energy waste in the hotel, but also actually leads to many IDs being lost. In this regard, the sensing tag 31 can be set on the room card, and in the corresponding test design, no current will flow until the sensing tag 31 is identified as a room card.

[0036] 5 is related to in-store sensing, in which the short-distance ultrasonic detection device 1 is installed in a sensing pen, and the sensing tag 31 is installed on an object in the store. For example, in the case of stuffed toys, the sensing tag 31 can be classified into different categories depending on the object, and can be used for transparent objects and light-absorbing objects.

[0037] 6 can also be applied to toys and the food service industry, such as the rotating rails of a conveyor belt sushi restaurant and the combination of plates. The near-field ultrasonic detection device 1 can be installed at the bottom of the dynamic toy, and the sensing tag 31 can be transparent. After reading the sensing tag 31, the near-field ultrasonic detection device 1 can cause a change in light, color, or sound based on the corresponding instruction on the sensing tag 31.

[0038] As described above, by setting the frequencies of the ultrasonic signal Ut and the ultrasonic reflected signal Ur, as well as the emission angle and reception angle, within specific ranges, the short-distance ultrasonic detection device 1 has high directivity and is increasingly able to detect situations near so-called dead zones that were previously undetectable, and is suitable for operation even in environments where the distance is close, the amount of light is insufficient, or light penetration is insufficient.

[0039] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these, and it is obvious that a person skilled in the art can make some changes or modifications without departing from the spirit of the present invention. The technical scope of the present invention also includes some changes or modifications without departing from the spirit of the present invention. The technical scope of the present invention is defined based on the claims. [Explanation of symbols]

[0040] 100 Short-range ultrasonic detection system 1. Short-range ultrasonic detection device 10 Microprocessors 20 Ultrasonic Sensing Assembly 21 Boost circuit 23 Ultrasonic transmission module 235 Piezoelectric Ultrasonic Sensor 25 Ultrasonic receiving module 255 Piezoelectric Ultrasonic Sensor 27 Amplification circuit 3. Sensing object 31 Sensing Tag 311 Radio wave attenuation section 313 Radio wave reflector 5. Database 7 CPU A Operation command C Control Signal D Drive signal E Activation Signal R reflected signal Rt Sensing result S Detection signal Ut ultrasound signal Ur ultrasonic reflection signal

Claims

1. A short-range ultrasonic detection device comprising a microprocessor that generates and outputs a control signal and an ultrasonic sensing assembly, The ultrasonic sensing assembly includes a boost circuit, an ultrasonic transmitting module, an ultrasonic receiving module, and an amplifier circuit; the boost circuit is electrically connected to the microprocessor, receives the control signal, and boosts the control signal to a drive signal; The ultrasonic transmission module is electrically connected to the boost circuit, receives the driving signal, and generates and outputs an ultrasonic signal, and the emission angle of the ultrasonic transmission module is between 2 degrees and 10 degrees; the ultrasonic receiving module receives an ultrasonic reflected signal generated by reflection of the ultrasonic signal, converts the ultrasonic reflected signal into a reflected signal, and outputs the reflected signal; the receiving angle of the ultrasonic receiving module is between 2 degrees and 10 degrees; The amplifier circuit is electrically connected to the ultrasonic receiving module and the microprocessor, and receives the reflected signal, amplifies the reflected signal to generate a detection signal, and transmits the detection signal to the microprocessor again, so that the microprocessor generates a sensing result according to the detection signal; A short-range ultrasonic detection device, characterized in that the frequency of the ultrasonic signal and the ultrasonic reflected signal is 500 KHz to 1.2 MHz, and the detection distance of the ultrasonic sensing assembly is 0.2 centimeters to 8 centimeters.

2. 2. The short-range ultrasonic detection device according to claim 1, wherein the ultrasonic transmitting module, the ultrasonic receiving module, the boost circuit and the amplifier circuit are packaged on a single wafer.

3. 3. The short-distance ultrasonic detection device according to claim 2, wherein the ultrasonic transmitting module and the ultrasonic receiving module each include at least one piezoelectric ultrasonic sensor.

4. The ultrasonic transmitting module and the ultrasonic receiving module each have a plurality of piezoelectric ultrasonic sensors; 4. The short-distance ultrasonic detection device according to claim 3, wherein a plurality of said piezoelectric ultrasonic sensors are arranged in an array.

5. 2. The short-range ultrasonic detection device of claim 1, wherein the frequency of the ultrasonic signal and the ultrasonic reflected signal is 600 KHz to 800 KHz, the emission angle and the reception angle are 3 degrees to 5 degrees, and the detection distance of the ultrasonic sensing assembly is 0.3 centimeters to 3 centimeters.

6. A short-distance ultrasonic detection system including a short-distance ultrasonic detection device, a detection target, a database, and a CPU, The short-range ultrasonic detection device includes a microprocessor and an ultrasonic sensing assembly; The microprocessor generates and outputs a control signal; The ultrasonic sensing assembly includes a boost circuit, an ultrasonic transmitting module, an ultrasonic receiving module, and an amplifier circuit; the boost circuit is electrically connected to the microprocessor, receives a control signal, and boosts the control signal to a drive signal; The ultrasonic transmission module is electrically connected to the boost circuit, receives the driving signal, and generates and outputs an ultrasonic signal, and the emission angle of the ultrasonic transmission module is between 2 degrees and 10 degrees; the ultrasonic receiving module receives an ultrasonic reflected signal generated by reflection of the ultrasonic signal, converts the ultrasonic reflected signal into a reflected signal, and outputs the reflected signal; the receiving angle of the ultrasonic receiving module is between 2 degrees and 10 degrees; The amplifier circuit is electrically connected to the ultrasonic receiving module and the microprocessor, and receives the reflected signal, amplifies the reflected signal to generate a detection signal, and transmits the detection signal to the microprocessor again, so that the microprocessor generates a sensing result according to the detection signal; The frequency of the ultrasonic signal and the ultrasonic reflected signal is between 500 KHz and 1.2 MHz, the sensing object has a sensing tag, The sensing tag has a radio wave attenuation section and a radio wave reflection section, The ultrasonic signal is reflected by the sensing tag to generate the ultrasonic reflection signal, and the detection distance between the short-distance ultrasonic detection device and the sensing object is 0.2 cm to 8 cm; A short-range ultrasonic detection system characterized in that the CPU activates the microprocessor based on an operation command to generate the control signal, and accesses and compares data in the database based on the sensing results of the short-range ultrasonic detection device.

7. 7. The short-range ultrasonic sensing system of claim 6, wherein the ultrasonic transmitting module and the ultrasonic receiving module each include at least one piezoelectric ultrasonic sensor.

8. The ultrasonic transmitting module and the ultrasonic receiving module each have a plurality of piezoelectric ultrasonic sensors; 8. The short-range ultrasonic detection system according to claim 7, wherein the piezoelectric ultrasonic sensors are arranged in an array.

9. 7. The short-range ultrasonic detection system of claim 6, wherein the frequency of the ultrasonic signal and the ultrasonic reflected signal is 600 KHz to 800 KHz, the emission angle and the reception angle are 3 degrees to 5 degrees, and the detection distance of the ultrasonic sensing assembly is 0.3 centimeters to 3 centimeters.

10. 7. The short-range ultrasonic detection system according to claim 6, wherein the radio wave attenuation portion of the sensing tag is a wave attenuation coating, a wave scattering coating, or a radio wave absorbing material.

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