CN207066547U - A kind of ultrasonic test liquid level device - Google Patents

Abstract

The utility model discloses a kind of ultrasonic test liquid level device, main control chip respectively with ultrasonic sensor, buzzer siren, key control module, LED display module and memory module connection, ultrasonic sensor includes ultrasonic transmitter, ultrasonic receiver and warming chip, key control module includes temperature display button, liquid level display button, modification alarm particular value button and system time display button, temperature display button, liquid level display button, modification alarm particular value button is connected with voice broadcast module, the utility model adds a warming chip on ultrasonic sensor, after measuring temperature, the numerical value measured to ultrasonic sensor carries out temperature-compensating, utilize the air density values of different temperatures, calculate distance again, error reduces, measurement is accurate.

Description

A kind of ultrasonic test liquid level device

Technical field：

The utility model belongs to ultrasonic technology field, specially a kind of ultrasonic test liquid level device.

Background technology：

With science and technology it is growing, increasing plant equipment gradually all becomes electronic equipment.Many electronics are set It is standby to start linked network under the promotion of science and technology, facilitate user to check real time data upload client computer.Sensor, it is a kind of Detection means, measured information can be experienced, and the information experienced can be become to have the electric signal of certain rule to send out Go out.Sensor technology is increasingly reformed in this day and age, and detection technique is applied in increasing product, in the survey adjusted the distance In amount, requirement more and more higher of the people to sensor.In some special occasions, such as dark, poisonous, electromagnetic interference is strong or smog Deng in rugged environment, workmen hardly enters carries out live ranging on the spot, and at this moment, ultrasonic sensor just provides for us Facility.Traditional mechanical and resistance-type surveys oil process and no longer meets the needs of current car owners, and they wish can be with There are more functions to aid in them, them is better understood by condition of the vehicle.Ultrasonic ranging is that one kind utilizes sound wave Characteristic, electronic counting, optoelectronic switch are combined to realize the method for contactless range measurement.Ultrasonic wave is noteworthy characterized by frequency Rate is high, wavelength is short, diffraction is mutually small, good directionality, decays in liquid and solid that small, penetrating power is big, runs into impurity or divides There is significant reflection at interface.In the animal kingdom, this no mesh animal of cave creature, most of positioned using ultrasonic wave, is surpassed Sound wave is by Medium Propagations such as air, and after barrier is encountered, ultrasonic wave returns, the ultrasonic wave that no mesh animal is returned by judgement Power and time of return judge its distance apart from objects in front.

Utility model content：

In view of the above-mentioned problems, the technical problems to be solved in the utility model is to provide a kind of ultrasonic test liquid level dress Put.

A kind of ultrasonic test liquid level device of the present utility model, including main control chip, ultrasonic sensor, buzzing Alarm, key control module, LED display module and memory module, the main control chip respectively with ultrasonic sensor, honeybee Alarm, key control module, LED display module and the memory module of ringing connect, and the ultrasonic sensor includes ultrasonic wave Transmitter, ultrasonic receiver and warming chip, the key control module includes temperature display button, liquid level shows and pressed Key, modification alarm particular value button and system time display button, the temperature display button, liquid level display button, are repaiied Change alarm particular value button to be connected with voice broadcast module.

Preferably, the main control chip is STM32f103rbt6 chips.

Preferably, the ultrasonic sensor is US-100 sensors.

Preferably, the voice broadcast module is SYN6288 modules.

The beneficial effects of the utility model：Ultrasonic wave utilizes air borne, and in different temperature, the density of air is not Together, the speed of ultrasonic propagation is different.Different temperature can cause the precision of ultrasonic wave to produce error, but the utility model exists A warming chip is added on ultrasonic sensor, after measuring temperature, trip temperature benefit is entered to the numerical value that ultrasonic sensor is measured Repay, using the air density values of different temperatures, then to calculate distance, that error will narrow down to very little.And the work(of ultrasonic wave Consume small, after running into the object different from atmospheric density, will reflect, so ultrasonic wave is well suited for the oil mass for measuring automobile. Warning function is additionally provided with the apparatus, and when oil mass, which declines, abnormal conditions occurs, warning system is carried out by buzzer siren Alarm, the abnormal conditions of the discovery automobile of family earlier can be used, timely find oil mass problem, prevent oil, oil leak these meetings steathily The situation continued for damaging user's property occurs, and reduces the loss of user.

Brief description of the drawings：

For ease of explanation, the utility model is described in detail by following specific implementations and accompanying drawing.

Fig. 1 is the utility model overall structure diagram；

Fig. 2 is Tthe utility model system circuit diagram；

Fig. 3 is ultrasonic ranging circuit diagram；

Fig. 4 is voice broadcast module circuit diagram；

Fig. 5 is level triggers model process figure；

Fig. 6 is serial ports triggering pattern flow chart；

Fig. 7 is temperature detection flow chart；

Fig. 8 is voice broadcast module operating mechanism flow chart.

Embodiment：

To make the purpose of this utility model, technical scheme and advantage of greater clarity, below by what is shown in accompanying drawing Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality With new scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily mixing Confuse concept of the present utility model.

As shown in figures 1-8, the utility model provides a kind of technical scheme：A kind of ultrasonic test liquid level device, bag Main control chip, ultrasonic sensor, buzzer siren, key control module, LED display module and memory module are included, it is described Main control chip connects with ultrasonic sensor, buzzer siren, key control module, LED display module and memory module respectively Connect, the ultrasonic sensor includes ultrasonic transmitter, ultrasonic receiver and warming chip, the key control module bag Include temperature display button, liquid level display button, modification alarm particular value button and system time display button, the temperature Display button, liquid level display button, modification alarm particular value button are connected with voice broadcast module.

Specifically, there are 4 key-press modules in the system, each of the system is made by the response of this 4 key-press modules Module is run.Temperature display button is to call warming chip, and current temperature value is shown by LCD display module, will measure value Reported with voice broadcast module；Liquid level display button is to call ultrasonic sensor, and ultrasonic sensor is measured Distance shown by LCD display module, value will be measured and reported with voice broadcast module, ultrasonic wave module operation in, If the difference of measured value is more than threshold value, buzzer alarm alarm twice.Modification alarm particular value button shows present threshold value Numerical value, and current particular value can be configured by key-press module and be saved in memory module.System time is shown Button is to show the system time.

Specifically, main control chip is STM32f103rbt6 chips, and the chip is compared with LPC2368, and the chip has STM public The built-in function provided is provided, and LPC2368 chips do not have built-in function, if programming is, it is necessary to write register on LPC2368 chips, And STM32 chips do not have to then, built-in function can be directly invoked.STM32 chips have 2 USART ports, compared to LPC2368's UART, USART are from literal upper understanding：Universal synchronous/asynchronous serial communication.UART：Generic asynchronous serial communicates.USART can To be used as UART, but UART can not use as USART.STM32 chips SRAM is 128KB, and LPC2368 SRAM only has 32KB.So the performance for the STM32 chips that compare will be significantly larger than LPC2368 chips.

Specifically, ultrasonic sensor is US-100 sensors, operating voltage 2.4V ~ 5.5V, quiescent current 2mA, is worked - 20 DEG C of temperature ~ 70 DEG C, 15 ° of measurement angle, maximum range 4.5m, nearest range 2cm, ultrasonic sensor include ultrasonic wave hair Emitter, ultrasonic receiver and warming chip.Ultrasonic sensor operation principle：

(1) level triggers pattern.I/O port（TRIG）10us high level is given, module receives high level and sends 8 40KHZ automatically Pulse, is sent that rear module is split to open detection pattern, has detected whether signal return, if module detection has ultrasonic wave to return Return, I/O port（ECHO）Export a permanent High level, high level lasting time is exactly ultrasonic wave from the time for being transmitted into return.Survey Go out distance calculation formula：

(2) serial ports triggering pattern.The TX of serial ports（TRIG）Pin inputs 0x55, and module sends 8 40KHZ ultrasound automatically Wave impulse, after echo-signal is detected, module can automatically turn on warming chip, carry out the measurement of temperature value, and then basis exists Different atmospheric density under different temperatures, are corrected to the distance of detection, the RX that the result after correction passes through serial ports （ECHO）Pin exports.16 system numbers of the byte of output result position 2, first character section are the most-significant bytes for measuring distance （HData）, second byte is to measure the least-significant byte of distance（LData）.Measuring distance calculation formula is：

TRIG/TX ends input 0x50, start the warming chip measurement Current Temperatures of sensor, ECHO/RX ends receive one Byte data (Data).Measure temperature computation formula：

Ultrasonic sensor selects US-100, does not have warming chip on HC-SR04 sensors, so HC-SR04 sensors The data error measured is substantially bigger, and the 340M/S in formula is the spread speed of ultrasonic wave at a normal temperature.And US- There is warming chip on 100 sensors, the data that US-100 sensors are passed back are after temperature-compensating, are compared, US- The test data of 100 sensors is more accurate.

Specifically, voice broadcast module is SYN6288 modules, and this module is supported in GB2312, GBK, BIG5 and UNICODE Code format text, the amount of text that the module plays every time up to 200 bytes, the module have 5 pins to be respectively：Power supply (VCC), Receiving terminal (RXD), transmitting terminal (TXD), (G), test side (BY).The operating voltage of the module is 3-5V, input/output port For TTL.

The utility model adds a warming chip on ultrasonic sensor, after measuring temperature, to ultrasonic sensor The numerical value measured carries out temperature-compensating, and using the air density values of different temperatures, then to calculate distance, that error will narrow down to Very little.And the small power consumption of ultrasonic wave, after running into the object different from atmospheric density, it will reflect, so ultrasonic wave is well suited for For measuring the oil mass of automobile.Warning function is additionally provided with the apparatus, when oil mass, which declines, abnormal conditions occurs, warning system Alarmed by buzzer siren, the abnormal conditions of the discovery automobile of family earlier can be used, timely find oil mass problem, prevent Only steal oil, oil leak these can damage user's property situation continueds occur, reduce the loss of user.

The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model Claimed scope is by appended claims and its equivalent thereof.

Claims (4)

1. A kind of 1. ultrasonic test liquid level device, it is characterised in that：Including main control chip, ultrasonic sensor, buzzing report Alert device, key control module, LED display module and memory module, the main control chip respectively with ultrasonic sensor, buzzing Alarm, key control module, LED display module and memory module connection, the ultrasonic sensor are sent out including ultrasonic wave Emitter, ultrasonic receiver and warming chip, the key control module includes temperature display button, liquid level shows and pressed Key, modification alarm particular value button and system time display button, the temperature display button, liquid level display button, are repaiied Change alarm particular value button to be connected with voice broadcast module.
2. A kind of 2. ultrasonic test liquid level device according to claim 1, it is characterised in that：The main control chip is STM32f103rbt6 chips.
3. A kind of 3. ultrasonic test liquid level device according to claim 1, it is characterised in that：The supersonic sensing Device is US-100 sensors.
4. A kind of 4. ultrasonic test liquid level device according to claim 1, it is characterised in that：The voice broadcast mould Block is SYN6288 modules.