CN202471025U - Ultrasonic meter ruler - Google Patents

Abstract

The utility model relates to an ultrasonic meter ruler, which belongs to the technical field of measurement. The ultrasonic meter ruler includes a single-chip microcomputer, a temperature sensor, an integrated ultrasonic sensor for sending and receiving, an ultrasonic transmitting circuit, an ultrasonic receiving circuit, a liquid crystal display module and buttons, the ultrasonic transmitting circuit and the ultrasonic receiving circuit are connected to the single-chip microcomputer, and the output terminal of the single-chip microcomputer is connected to the liquid crystal display module. Connected, the ultrasonic sensor with integrated transceiver is connected with the ultrasonic transmitting circuit and the ultrasonic receiving circuit, and the single-chip microcomputer is used to record the measurement results. The ultrasonic meter stick adopts the principle of ultrasonic reflection echo distance measurement and ultrasonic cross-beam distance measurement, which can not only realize the detection distance of a single machine, but also realize the measurement of a long distance between two machines. The ultrasonic meter ruler of the utility model is a distance measuring equipment with fast measurement, flexible use and low price.

Description

Ultrasonic Meter Ruler

technical field

The utility model relates to an ultrasonic meter ruler, which belongs to the technical field of wireless distance measurement. the

Background technique

Today, measurement technology permeates every aspect of our manufacturing, and there are many ways to measure the linear distance between two points. The most commonly used measurement tools are vernier calipers, rulers, tape measures, etc. New technology measurement methods such as lasers and ultrasonics also play an important part in the measurement field. For the measurement of longer distances (about 50 meters), tape measures are often used as measuring tools. However, this measuring tool needs to be rolled up or pulled out continuously during frequent use, which is extremely inconvenient. Measuring with a laser is easy, but expensive. At present, most of the existing ultrasonic measurement technologies use its reflection principle, and the measurement conditions require the reflection surface of the measured object to have a certain flatness area, and the measurement distance is short, so it is difficult to achieve long-distance measurement. Although the patented ultrasonic range finder "201010543096.8" utilizes the ultrasonic beam-to-beam measurement technology, the measurement equipment is divided into main machine and auxiliary machine. Although the measurement distance is increased, it also brings the following disadvantages: 1).Using radio signals as ultrasonic transmission The start time signal increases the cost of the system; 2). Every measurement needs to be checked first; 3). There are master and slave machines, and the data can only be read by people at one end, which is inconvenient to use in construction sites where measurements are frequent ; 4). For the measurement of close-distance walls, etc., the main machine or the auxiliary machine cannot go deep into the surface, resulting in a limited range of use. the

Utility model content

The purpose of the utility model is to solve the problems of high cost, inconvenient use and limited use range of the existing ultrasonic range finder, thereby providing an ultrasonic meter ruler. the

The utility model provides an ultrasonic meter ruler for solving the above-mentioned technical problems. The ultrasonic meter ruler includes a single-chip microcomputer, an integrated ultrasonic sensor for transmitting and receiving, an ultrasonic transmitting circuit, an ultrasonic receiving circuit and a liquid crystal display module, an ultrasonic transmitting circuit, an ultrasonic receiving circuit and a single-chip computer. Connected, the output end of the single-chip microcomputer is connected with the liquid crystal display module, the ultrasonic sensor integrated with the transceiver is connected with the ultrasonic transmitting circuit and the ultrasonic receiving circuit, and the single-chip microcomputer is used to control the ultrasonic transmitting circuit to transmit ultrasonic waves and record the measurement results. the

The ultrasonic meter ruler also includes a temperature sensor, which is connected to the AD port of the single-chip microcomputer. the

Described single-chip microcomputer is STC12C5201AD chip, is used for recording the result of each measurement and can utilize keyboard or ultrasonic receiving circuit to arouse through interruption. the

The ultrasonic transmitting circuit includes a triode and a transformer, which are used to adapt to the low voltage powered by the battery and increase the ultrasonic transmitting distance. the

The ultrasonic receiving circuit includes an operational amplifier LM324, a triode, a diode, a capacitor and a resistor, which are used to amplify the ultrasonic feedback signal and convert it into a pulse signal for detection and identification by the single-chip microcomputer. the

The ultrasonic sensor integrated with transmitting and receiving is a waterproof ultrasonic sensor TCF40-16TR1. the

The ultrasonic meter ruler also includes a button module, which is connected with a single-chip microcomputer, and includes a distance measurement mode selection button and a measurement button. the

The utility model utilizes the ultrasonic principle for distance measurement, retains the principle of ultrasonic reflection echo distance measurement, and at the same time integrates the principle of ultrasonic cross-beam distance measurement. The utility model has fast measurement, flexible use and low price. the

Description of drawings

Fig. 1 is a block diagram of the hardware structure of the ultrasonic meter ruler of the present invention. the

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further. the

The block diagram of the hardware structure of the ultrasonic meter ruler is shown in Figure 1, including a single-chip microcomputer, a temperature sensor, an ultrasonic sensor integrating transceiver, an ultrasonic transmitting circuit, an ultrasonic receiving circuit, a liquid crystal display module and a key module. The single-chip microcomputer is selected as the STC12C5201AD chip with low price and high reliability. This chip has its own integrated 10-bit AD conversion and 1Kb EEPROM, which is used to record the results of each measurement, and can set the power-down mode. Use the keyboard or ultrasonic The receiving circuit is awakened by interruption, which can greatly reduce the power consumption of the system; the temperature sensor is a temperature-sensing resistor connected to the AD conversion port of the single-chip microcomputer through the test bridge to provide correction parameters for the system distance measurement, and the integrated ultrasonic sensor for sending and receiving is selected as a waterproof ultrasonic sensor TCF40-16TR1, the ultrasonic transmitting circuit is composed of a triode and a transformer. The transformer part is adapted to the low voltage powered by the battery, and at the same time increases the ultrasonic transmitting sound pressure and increases the transmitting distance. The ultrasonic receiving circuit includes an operational amplifier LM324, a triode, a diode, Capacitors and resistors are used to amplify the ultrasonic feedback signal and convert it into a pulse signal for common detection circuit identification. The liquid crystal display module refers to a low-power display that can display the distance measurement mode, distance value and temperature. The buttons include distance measurement mode selection key and measurement key. the

The ultrasonic meter stick can detect the distance with a single machine, and can also measure a long distance with two machines paired with each other. This embodiment describes in detail the two ultrasonic meter sticks paired with each other. Its working principle is as follows:

When the two ultrasonic meter rulers of the utility model are distributed in different positions for measurement, and one of them presses the measurement key, the processor immediately starts the timer to start timing, and when the timing reaches the specified fixed time, a certain length of ultrasonic wave, after the receiving circuit of the ultrasonic meter ruler at another position receives the ultrasonic signal, it starts the timer and monitors the duration of the beam of ultrasonic intensity. Through the judgment of the processor, if it is to measure the transmitted signal, when the timer reaches the specified A beam of ultrasonic feedback signal is emitted only at a fixed time. The length of the feedback ultrasonic signal is not equal to the length of the transmitted ultrasonic signal, and the difference is very large. The transmitted ultrasonic signal is extremely short, so that the previous ultrasonic meter can judge that the signal is reflected from the environment. The interference signal is still the feedback signal of the ultrasonic meter ruler at another position. After the previous ultrasonic meter ruler receives and judges it as the feedback signal, it immediately reads the timer timing value, clears the timer, and restarts the timing. The previous ultrasonic meter ruler The ruler processor needs to complete data processing and display when the next specified time does not arrive. When the timer reaches the specified time again, the meter stick will send the next ultrasonic measurement signal, and the ultrasonic meter stick at another position will read the timing value of the timer immediately after receiving the sending signal again, and set the timer to Reset to zero, restart timing, and at the same time, when the timer does not reach the specified time, the processor completes the data processing and displays it. It also sends out the ultrasonic feedback signal again after the specified time is reached, and so on, until the measurement key is disconnected. If the ultrasonic meter ruler at the previous position fails to receive the feedback measurement signal after transmitting the measurement signal for 1 second, the processor considers that the measurement signal is lost and resends the next measurement signal. Since the two ultrasonic meter rulers are the same product, it is stipulated that The fixed time of waiting for transmission is equal, and the fixed time is longer than the duration of the ultrasonic trailing aftermath, so the distance between the two points to be measured can be calculated. If the signal received by the ultrasonic meter ruler at the previous position is an interference signal, no processing will be done. The regular sending time is relatively long to eliminate the signal interference of the ultrasonic waves reflected back by the surrounding environment.

Claims (6)

1. Ultrasonic meter ruler, it is characterized in that: this ultrasonic meter ruler comprises single-chip microcomputer, transceiver integrated ultrasonic sensor, ultrasonic transmitting circuit, ultrasonic receiving circuit and liquid crystal display module, ultrasonic transmitting circuit and ultrasonic receiving circuit are connected with single-chip microcomputer, the output of single-chip microcomputer The end is connected with the liquid crystal display module, and the ultrasonic sensor integrated with the transceiver is connected with the ultrasonic transmitting circuit and the ultrasonic receiving circuit. The single-chip microcomputer is used to control the ultrasonic transmitting circuit to transmit ultrasonic waves and record the measurement results. 2. The ultrasonic meter stick according to claim 1, characterized in that the ultrasonic meter stick further comprises a temperature sensor connected to the AD port of the single chip microcomputer. 3. The ultrasonic meter ruler according to claim 1 or 2, characterized in that: the single-chip microcomputer is a STC12C5201AD chip, which is used to record the results of each measurement and can be awakened by interrupts using a keyboard or an ultrasonic receiving circuit. 4. The ultrasonic meter ruler according to claim 1 or 2, characterized in that: the ultrasonic transmitting circuit includes a triode and a transformer, which are used to adapt to the low voltage of the battery power supply and increase the ultrasonic transmitting distance. 5. The ultrasonic meter ruler according to claim 1 or 2, characterized in that: the ultrasonic receiving circuit includes an operational amplifier LM324, a triode, a diode, a capacitor and a resistor, which are used to amplify the ultrasonic feedback signal and convert it into a pulse signal For the detection and identification of the single-chip microcomputer. 6. The ultrasonic meter stick according to claim 1 or 2, characterized in that: the integrated transmitting and receiving ultrasonic sensor is a waterproof ultrasonic sensor TCF40-16TR1. 7. The ultrasonic meter stick according to claim 1 or 2, characterized in that: said ultrasonic meter stick also includes a button module, which is connected to a single-chip microcomputer and includes a distance measurement mode selection key and a measurement key.

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