CN211042514U

CN211042514U - Road surface temperature measuring instrument

Info

Publication number: CN211042514U
Application number: CN201921958170.5U
Authority: CN
Inventors: 李连成
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-07-17
Anticipated expiration: 2029-11-14

Abstract

The utility model relates to a road surface thermoscope, especially an L WY-2 road surface thermoscope, the utility model discloses by the casing, set up liquid crystal display and the function button on the casing top panel and set up the temperature measuring device in the casing, the function button is switch, data retention button, switches button and ℃/< F > switch the button respectively and constitutes, the utility model relates to an use the high accuracy measuring instrument of microprocessor technique as the core, use 16 AD converters to carry out temperature measurement, temperature sensor adopts K type thermocouple, can measure centigrade and fahrenheit degree, has data retention, and the decimal point switches over, and operating condition memory, multiple functions such as battery low power display, the design is compact, measures the accuracy, uses convenient to carry.

Description

Road surface temperature measuring instrument

Technical Field

The utility model relates to a road surface thermoscope, especially an L WY-2 road surface thermoscope.

Background

The existing common method is an infrared thermometer, when the temperature of the road surface is detected, the emitted laser beam can be absorbed by the black road surface to cause larger temperature error, when the probe type digital display thermometer is close to the road surface, the contact area of a round bar probe and the ground is too small, the probe exposed in the air is too large, and the temperature precision error measured by the probe is larger due to the influence of the ambient wind power and the temperature of the radiated sunlight. The curved surface form protruding probe sensor of this patent design, slice sensing acquisition piece becomes flat by the curved surface when pushing down the surveyed road surface, makes road surface and slice sensor fully coincide, goes the cylindric casing of plastics of circumference also with the road surface contact have kept apart interference such as solar radiation and cold wind, the true accuracy of temperature of collection.

The content of the utility model is that,

the utility model aims to solve the technical problem that a road surface thermoscope is provided.

The utility model provides a technical problem adopt following scheme:

the utility model comprises a shell, a liquid crystal display screen and function keys which are arranged on an upper panel of the shell, and a temperature measuring device which is arranged in the shell, wherein the function keys are respectively composed of a power switch, a data retaining key, a switching key and a ℃/< F > switching key,

the temperature measuring device consists of an analog-digital converter and a potentiometer, the potentiometer consists of a high-end calibration circuit, a low-end adjustable calibration circuit and a compensation correction circuit, the input end of the compensation correction circuit is provided with a probe sensor, the compensation correction circuit is connected with an E port of the analog-digital converter through the low-end adjustable calibration circuit and the high-end calibration circuit in sequence, an A, B, C, D port of the analog-digital converter is respectively formed by a power switch, a data holding key, a switching key and a ℃/< F > switching key,

the liquid crystal display screen is connected with the output end of the analog-to-digital converter.

The utility model discloses still including setting up in backlight and the power module of liquid crystal display side.

The utility model discloses an actively the effect as follows:

the utility model relates to a high-precision measuring instrument taking microprocessor technology as a core, which uses a 16-bit AD converter to measure temperature; the temperature sensor adopts a K-type thermocouple, can measure the temperature in centigrade and the temperature in Fahrenheit, has multiple functions of data retention, decimal point switching, operation state memory, battery low-power display and the like, and has the advantages of compact design, accurate measurement and convenient use and carrying.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic circuit block diagram of the present invention.

Detailed Description

As shown in the attached FIGS. 1-2, the present invention comprises a housing 1, a liquid crystal display 2 and function buttons disposed on the upper panel of the housing 1, and a temperature measuring device disposed in the housing 1, wherein the function buttons are respectively a power switch 3, a data keeping button 4, a 0.1/1 switch button 5, and a F/F switch button 6,

the temperature measuring device comprises an analog-to-digital converter 7 and a potentiometer, the potentiometer comprises a high-end calibration circuit 8, a low-end adjustable calibration circuit 9 and a compensation correction circuit 10, a probe sensor is arranged at the input end of the compensation correction circuit 10, the compensation correction circuit 10 is connected with an E port of the analog-to-digital converter 7 through the low-end adjustable calibration circuit 9 and the high-end calibration circuit 8 in sequence, an A, B, C, D port of the analog-to-digital converter 7 is respectively connected with a power switch 3, a data holding key 4, a 0.1/1 degree switching key 5 and a ℃/switch key 6,

the liquid crystal display screen 2 is connected with the output end of the analog-to-digital converter 7.

The utility model discloses still including setting up in backlight and the power module of 2 sides of liquid crystal display.

The working principle of the utility model is as follows:

when measuring the temperature, firstly, a power switch is pressed down, a power supply is switched on for preheating for three minutes, a thermocouple is inserted into an input port, the required function and range are selected, and a thermocouple probe is contacted with a measured object until the data is stable. (pressing the hold button at this time will hold the current display data)

1. If the screen displays 'Hi' to indicate that the thermocouple is not accessed, poor contact or overrange input, and displays 'L o' to indicate underrange;

2. when displaying "

When the symbol is marked, the battery is insufficient, and should be replaced;

3. in order to ensure the accuracy of the measurement, the measurement should be carried out after the machine is started and preheated for 3 minutes.

The utility model discloses accessible switches the button and shows measurement degree centigrade and fahrenheit temperature respectively, still can make data retention according to the precision demand, and the decimal point switches, and operating condition memory, multiple functions such as battery low power display, the design is compact, measures accurately, uses convenient to carry.

Claims

1. A road surface temperature measuring instrument is characterized by comprising a shell (1), a liquid crystal display screen (2) and functional keys which are arranged on an upper panel of the shell (1), and a temperature measuring device arranged in the shell (1), wherein the functional keys are respectively composed of a power switch (3), a data holding key (4), a 0.1/1 degree switching key (5) and a ℃/< F > switching key (6),

the temperature measuring device comprises an analog-digital converter (7) and a potentiometer, the potentiometer comprises a high-end calibration circuit (8), a low-end adjustable calibration circuit (9) and a compensation correction circuit (10), a probe sensor is arranged at the input end of the compensation correction circuit (10), the compensation correction circuit (10) is sequentially connected with an E port of the analog-digital converter (7) through the low-end adjustable calibration circuit (9) and the high-end calibration circuit (8), an A, B, C, D port of the analog-digital converter (7) is respectively connected with a power switch (3), a data holding key (4), a 0.1/1 degree switching key (5) and a ℃/f switching key (6),

the liquid crystal display screen (2) is connected with the output end of the analog-to-digital converter (7).

2. A road thermometer according to claim 1, characterised by further comprising a backlight arranged at the side of the liquid crystal display (2).

3. The road thermometer of claim 2 further comprising a power module.

4. A road thermometer according to any of the claims 1-3, characterised in that the analog-to-digital converter (7) is of the type IC L7135, the potentiometer is of the type 67WR10K and the probe sensor is of the type curved K-type temperature sensor.