CN213275949U

CN213275949U - Novel ultrasonic sensor

Info

Publication number: CN213275949U
Application number: CN202021955626.5U
Authority: CN
Inventors: 吕付磊
Original assignee: Henan Lejia Electronic Technology Co ltd
Current assignee: Henan Lejia Electronic Technology Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-05-25
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to the technical field of sensors, in particular to a novel ultrasonic sensor which improves the flexibility in the use process, can customize different operation flows according to different occasions and increase the test precision; the novel ultrasonic sensor is compatible with two ultrasonic probes with working frequencies of 50KHz and 40KHz, the ultrasonic probe with the working frequency of 40KHz is provided with an external horn cover, the core part of the novel ultrasonic sensor uses an STC high-performance singlechip, and the receiving part uses an ultrasonic receiving special IC TL 852.

Description

Novel ultrasonic sensor

Technical Field

The utility model relates to a technical field of sensor especially relates to a new-type ultrasonic sensor.

Background

A common probe design scheme with the working frequency of 50Khz generally refers to a 6500 ranging module, and a core part uses special ultrasonic ranging chips TL851 and TL852, so that the scheme has high hardware cost, fixed hardware working flow and poor debugging flexibility.

The probe with the working frequency of 40KHz is commonly used, a chip which is similar to MAX232 and can generate positive and negative voltages is generally used for a vibration circuit, the vibration voltage of the method is low, the effect of remote distance measurement is not friendly, meanwhile, the general beam angle of the probe is large, certain special requirements are required for the use scene, and meanwhile, the measurement precision has a certain difference compared with that of an imported probe.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an improve the flexibility in the use, can go the different operation flow of customization according to different occasions, increase measuring accuracy's new-type ultrasonic sensor.

The utility model discloses a new-type ultrasonic sensor, new-type ultrasonic sensor compatible operating frequency are two kinds of ultrasonic transducer of 50KHz and operating frequency are 40KHz, and the ultrasonic transducer that operating frequency is 40KHz is provided with external loudspeaker cover, and new-type ultrasonic sensor core part uses STC high performance singlechip, and receiving part uses ultrasonic wave receiving special IC TL 852.

The utility model discloses a new-type ultrasonic sensor still supports serial ports mode including new-type ultrasonic sensor.

The utility model discloses a new-type ultrasonic sensor still supports ordinary mode including new-type ultrasonic sensor.

The utility model discloses a new-type ultrasonic sensor still includes to be provided with temperature-detecting and compensation module on the new-type ultrasonic sensor.

The utility model discloses a new-type ultrasonic sensor still includes new-type ultrasonic sensor compatible 12V power supply system and 5V power supply system dual power mode.

The utility model discloses a new-type ultrasonic sensor still includes new-type ultrasonic sensor power mode preference 5V power supply system formula.

Compared with the prior art, the beneficial effects of the utility model are that: TL852, a special ultrasonic receiving IC, is used in the receiving part, so that the flexibility in the using process can be improved due to the use of the single chip microcomputer, different operation flows can be customized according to different occasions, and the external horn cover is arranged for correcting a beam angle, so that the hardware cost is reduced, and the practicability is improved.

Drawings

Fig. 1 is a schematic diagram of a front view structure of a PCB of the present invention;

fig. 2 is a schematic diagram of a back view structure of the PCB of the present invention;

fig. 3 is a schematic diagram of the serial port mode work flow of the present invention;

fig. 4 is a schematic diagram of the working flow of the common mode of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figures 1 to 4, the utility model discloses a novel ultrasonic sensor, novel ultrasonic sensor compatible operating frequency is two kinds of ultrasonic probe of 50KHz and operating frequency is 40KHz, and the ultrasonic probe of operating frequency is 40KHz is provided with external horn cover, and novel ultrasonic sensor core part uses STC high performance singlechip, and receiving part uses ultrasonic wave receiving special IC TL 852; through the arrangement, the receiving part uses the ultrasonic receiving special IC TL852, the flexibility in the use process can be improved due to the use of the single chip microcomputer, different operation flows can be customized according to different occasions, the external horn cover is arranged for correcting a beam angle, the hardware cost is reduced, and the practicability is improved.

The novel ultrasonic sensor of the utility model also comprises a novel ultrasonic sensor supporting a serial port working mode; firstly, a 10-pulse square wave signal is generated through a main control chip, the base of a switch triode 619 is pushed, the collector 619 controls the special middle period of ultrasonic waves, and then a 10-pulse signal with the voltage being increased to be close to sine waves is generated to push a probe to generate ultrasonic oscillation waves, and the ultrasonic waves are formed and emitted. Marking the time of sending the ultrasonic wave as a, keeping the driving circuit silent after the sound wave is sent out, and waiting for receiving the reflected echo signal after the sound wave contacts the object. The sound wave is transmitted for a period of time and then collides with an object to generate a reflected wave, the reflected wave returns to the surface of the film of the receiving probe for the same period of time, and the film vibrates to generate capacitance change, so that the sound wave signal is converted into an electric signal. At this time, the echo signal is received by the dedicated ultrasonic wave receiving IC and the echo time is recorded as b. The time for the surface acoustic wave from the sensor to the object to operate can be obtained, the current acoustic wave transmission speed can be calculated according to the current temperature according to the sound velocity of 340 m/s in the standard environment, the distance can be calculated according to the sound velocity and the detection time, the distance data is directly sent through the serial port, flexible switching is carried out according to the use scene, and the practicability is improved.

The novel ultrasonic sensor of the utility model also comprises a novel ultrasonic sensor supporting a common working mode; the time mark that the master control board triggered the ultrasonic wave is a, then produces a square wave signal of 10 pulses through the master control chip, promotes switch triode 619 base, 619 collecting electrode control ultrasonic special middle week, and then produces a pulse signal that 10 pulse voltage promoted and is close to the sine wave and promotes the probe and produce the ultrasonic oscillation wave, the ultrasonic wave forms and sends. After the sound wave is emitted, the driving circuit is kept silent, and a reflected echo signal after the sound wave contacts an object is waited to be received. The sound wave is transmitted for a period of time and then collides with an object to generate a reflected wave, the reflected wave returns to the surface of the film of the receiving probe for the same period of time, and the film vibrates to generate capacitance change, so that the sound wave signal is converted into an electric signal. And at the moment, the echo signals are received by using the special ultrasonic receiving IC and are simultaneously fed back to the main control board, and the receiving time is defined as b. The main control board calculates the final distance, and flexible switching is performed according to the use scene, so that the practicability is improved.

The novel ultrasonic sensor of the utility model also comprises a temperature detection and compensation module arranged on the novel ultrasonic sensor; through the arrangement, the measurement precision is improved, and the practicability is improved.

The novel ultrasonic sensor of the utility model also comprises a dual power mode of the novel ultrasonic sensor compatible with a 12V power supply system and a 5V power supply system; through the arrangement, the power supply effect of the novel ultrasonic sensor is improved, and the practicability is improved.

The novel ultrasonic sensor of the utility model also comprises a novel ultrasonic sensor power supply mode which preferentially selects a 5V power supply system type; 12V is the commonly used DC supply voltage, because module steady voltage chip can produce certain heat in work, so can the preference 5V under the stable condition of outside 5V power supply, reduces the influence of temperature to probe work to minimum, increases the accuracy nature of probe, improves the practicality.

The installation mode, the connection mode or the arrangement mode of the novel ultrasonic sensor of the utility model are common mechanical modes, and the novel ultrasonic sensor can be implemented as long as the beneficial effects can be achieved; the utility model discloses a new-type ultrasonic sensor's operating frequency is 50KHz ultrasonic transducer, and operating frequency is 40 KHz's ultrasonic transducer and STC high performance singlechip for purchasing on the market, and this industry technical staff only need according to its subsidiary service instruction install and operate can.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The novel ultrasonic sensor is characterized in that the novel ultrasonic sensor is compatible with two ultrasonic probes with working frequencies of 50KHz and 40KHz, the ultrasonic probe with the working frequency of 40KHz is provided with an external horn cover, the core part of the novel ultrasonic sensor uses an STC high-performance singlechip, and the receiving part uses an ultrasonic receiving special IC TL 852.

2. The novel ultrasonic sensor of claim 1, further comprising the novel ultrasonic sensor supporting a serial port mode of operation.

3. The novel ultrasonic sensor of claim 2, further comprising the novel ultrasonic sensor supporting a normal mode of operation.

4. The novel ultrasonic sensor of claim 3, further comprising a temperature sensing and compensation module disposed on the novel ultrasonic sensor.

5. The novel ultrasonic sensor of claim 4, further comprising a dual power mode in which the novel ultrasonic sensor is compatible with a 12V power supply system and a 5V power supply system.

6. The novel ultrasonic sensor of claim 5, further comprising a preferred 5V power system for the novel ultrasonic sensor power mode.