CN203259890U - Automatic sprinkling device for road friction coefficient tester - Google Patents
Automatic sprinkling device for road friction coefficient tester Download PDFInfo
- Publication number
- CN203259890U CN203259890U CN 201320195672 CN201320195672U CN203259890U CN 203259890 U CN203259890 U CN 203259890U CN 201320195672 CN201320195672 CN 201320195672 CN 201320195672 U CN201320195672 U CN 201320195672U CN 203259890 U CN203259890 U CN 203259890U
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- ball valve
- friction coefficient
- water pump
- sprinkling
- electric ball
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Abstract
An automatic sprinkling device for a road friction coefficient tester in the utility model relates to a sprinkling device, especially relates to an automatic sprinkling device automatically adjusting sprinkling quantity of a road friction coefficient tester with an electric ball valve according to the running speed and is used for forming a water film of a certain thickness on a measured surface according to different standards during surface friction coefficient testing on a highway pavement or an airport runway. The automatic sprinkling device comprises a water pump, a sprinkling controller, a flow meter, a vehicle speed sensor and an electric ball valve, wherein the water pump is connected with a water tank on a traction vehicle, the flow meter is respectively connected with the water pump and the electric ball valve, the other side of the electric ball valve is connected with a sprinkling nozzle, the sprinkling controller is respectively connected with the flow meter, the vehicle speed sensor and the electric ball valve through a cable, the sprinkling controller is provided with a relay and a control chip, an output end of the control chip is connected with the relay, and the control chip adopts a single chip microcomputer, controls actions of the electric ball valve and the water pump and acquires and transmits flow data.
Description
Technical field
The automatic water system that the utility model is used for friction coefficient tester for pavement relates to a kind of watering device, particularly a kind of electrical ball valve that utilizes is adjusted the automatic water system of friction coefficient tester for pavement watering amount automatically according to travel speed, is used for highway pavement or airfield runway are carried out forming according to various criterion at measured surface when skin-friction coefficient is tested the moisture film of fixed thickness.
Background technology
The cling property of express highway pavement is the important indicator of estimating the new highway construction quality, and the highway pavement cling property in operation is traffic safety, especially the important leverage of sleety weather traffic safety.Currently usually detect with friction coefficient tester for pavement for cling property, these type of friction coefficient tester for pavements of great majority do not have the function according to travel speed adjustment watering amount, and there is following problems in this kind equipment:
When working due to friction coefficient tester for pavement, road surface PVvalue testing wheel front end road surface need to form fixing water film thickness, water film thickness is thicker, and test result is just less, and water film thickness is thinner, test result is just larger, and therefore fixing water film thickness is test result necessary guarantee accurately.Because can causing friction coefficient tester for pavement, many reasons can not guarantee at the uniform velocity to travel according to fixed speed during test, fixing watering amount can cause the water film thickness of surface friction coefficient testing wheel front end under different travel speeds different, the faster water film thickness of the speed of a motor vehicle is thinner, the slower water film thickness of the speed of a motor vehicle is thicker, and test result changes with the speed of a motor vehicle and forms than great fluctuation process.
For addressing the above problem; Part producer utilizes pneumatic control valve; Electric controller; Flowmeter and vehicle speed sensor construct the automatic water system of regulating the watering amount based on the speed of a motor vehicle; But the source of the gas that must have certain pressure drives variable valve due to the most narrow space of friction coefficient tester for pavement towing vehicle; Electric power is supplied with limited; Settle comparatively difficulty of extra air pump; The air pump noise is larger simultaneously; Utilize the source of the gas of tractor brake system itself to have potential safety hazard; In case system leak might cause the tractor brake system locked; Thereby initiation traffic hazard.
Summary of the invention
The purpose of this utility model is to provide a kind of automatic water system for friction coefficient tester for pavement for above-mentioned weak point; Utilize electrical ball valve automatically to adjust friction coefficient tester for pavement watering amount according to travel speed; Change the at present existing automatic water system of not controlling the watering amount or utilizing pneumatic control valve adjusting watering amount; Adopt sprinkler controller to measure current vehicle speed; Calculate target discharge according to the water film thickness that presets again; Carry out subtraction with current discharge; Drive the electrical ball valve aperture in the modulating pulse mode again; Thereby realize the Dynamic Matching of watering amount and current vehicle speed; Guarantee water film thickness in allowed limits; Thereby improve the accuracy of surface friction coefficient test result.
The automatic water system that is used for friction coefficient tester for pavement takes following technical scheme to realize: the automatic water system that is used for friction coefficient tester for pavement comprises water pump, sprinkler controller, flowmeter, vehicle speed sensor and electrical ball valve, water pump is connected with water tank on towing vehicle, flowmeter is connected with electrical ball valve with water pump respectively, the opposite side of electrical ball valve connects Water spray nozzle, and sprinkler controller is connected with flowmeter, vehicle speed sensor and electrical ball valve by cable respectively; Described sprinkler controller has relay and control chip, and the output terminal of control chip is connected with relay, and described control chip adopts single-chip microcomputer, controls action and collection and the transmitted traffic data of electrical ball valve and water pump.
Described single-chip microcomputer adopts the single-chip microcomputer of 51 models.
Principle of work: when the automatic water system that is used for friction coefficient tester for pavement uses, measure the towing vehicle travel speed by vehicle speed sensor, simultaneously by the current discharge of flowmeter survey, and described Vehicle Speed and discharge data are sent to sprinkler controller, judge whether to start water pump by sprinkler controller according to above-mentioned data.If vehicles failed travels, target discharge is zero, and water pump cuts out, and stops watering; When Vehicle Driving Cycle, sprinkler controller starts water pump, and calculate target discharge according to water film thickness default in current vehicle speed and sprinkler controller, and carry out subtraction with current discharge, if target discharge greater than current discharge, drives electrical ball valve in the modulating pulse mode and does opening action, the duration is 10 ~ 100ms, if target discharge drives electrical ball valve in the modulating pulse mode less than current discharge and does closing motion, the duration is 10 ~ 100ms.In the Vehicle Driving Cycle process, sprinkler controller is monitored the speed of a motor vehicle and watering flow in real time, and constantly adjusts the aperture of electrical ball valve according to the real-time speed of a motor vehicle, watering flow and current vehicle speed are mated at any time, if vehicle stop travels, sprinkler controller switches off the pump, and closes simultaneously electrical ball valve.
The utility model utilizes electrical ball valve automatically to adjust PVvalue testing instrument watering amount according to travel speed, overcome prior art and do not controlled the watering amount or utilize pneumatic control valve to regulate the deficiency of the automatic water system of watering amount, for the accuracy of surface friction coefficient test result provides guarantee.
Description of drawings
Below with reference to accompanying drawing, the utility model is described further:
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is fundamental diagram of the present utility model.
In figure: 1, sprinkler controller, 2, vehicle speed sensor, 3, flowmeter, 4, water pump, 5, electrical ball valve, 6, Water spray nozzle.
Embodiment
With reference to accompanying drawing 1 ~ 2, the automatic water system that the utility model is used for friction coefficient tester for pavement comprises water pump 4, sprinkler controller 1, flowmeter 3, vehicle speed sensor 2 and electrical ball valve 5, water pump 4 is connected with water tank on towing vehicle, flowmeter 3 is connected with electrical ball valve 5 with water pump 4 respectively, the opposite side of electrical ball valve 5 connects Water spray nozzle 6, and sprinkler controller 1 is connected with flowmeter 3, vehicle speed sensor 2 and electrical ball valve 5 by cable respectively; Described sprinkler controller 1 has relay and control chip, and the output terminal of control chip is connected with relay, and described control chip adopts single-chip microcomputer, controls action and collection and the transmitted traffic data of electrical ball valve 5 and water pump 4.
Described single-chip microcomputer adopts the single-chip microcomputer of 51 models.
Principle of work: when the automatic water system that is used for friction coefficient tester for pavement uses, measure the towing vehicle travel speed by vehicle speed sensor 2, measure current discharge by flowmeter 3 simultaneously, and described Vehicle Speed and discharge data are sent to sprinkler controller 1, judge whether to start water pump 4 by sprinkler controller 1 according to above-mentioned data.If vehicles failed travels, target discharge is zero, and water pump 4 cuts out, and stops watering; When Vehicle Driving Cycle, sprinkler controller 1 starts water pump 4, and calculate target discharge according to water film thickness default in current vehicle speed and sprinkler controller 1, and carry out subtraction with current discharge, if target discharge greater than current discharge, drives electrical ball valve 5 in the modulating pulse mode and does opening action, the duration is 10 ~ 100ms, if target discharge drives electrical ball valve 5 in the modulating pulse mode less than current discharge and does closing motion, the duration is 10 ~ 100ms.In the Vehicle Driving Cycle process, sprinkler controller 1 is monitored the speed of a motor vehicle and watering flow in real time, and constantly adjusts the aperture of electrical ball valve according to the real-time speed of a motor vehicle, watering flow and current vehicle speed are mated at any time, if vehicle stop travels, sprinkler controller 1 switches off the pump 4, closes simultaneously electrical ball valve 5.
Claims (3)
1. automatic water system that is used for friction coefficient tester for pavement, it is characterized in that: comprise water pump, sprinkler controller, flowmeter, vehicle speed sensor and electrical ball valve, water pump is connected with water tank on towing vehicle, flowmeter is connected with electrical ball valve with water pump respectively, the opposite side of electrical ball valve connects Water spray nozzle, and sprinkler controller is connected with flowmeter, vehicle speed sensor and electrical ball valve by cable respectively; Described sprinkler controller has relay and control chip, and the output terminal of control chip is connected with relay.
2. the automatic water system for friction coefficient tester for pavement according to claim 1, is characterized in that: described control chip employing single-chip microcomputer, action and collection and the transmitted traffic data of control electrical ball valve and water pump.
3. the automatic water system for friction coefficient tester for pavement according to claim 2, is characterized in that: the single-chip microcomputer of described single-chip microcomputer employing 51 models.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195672 CN203259890U (en) | 2013-04-17 | 2013-04-17 | Automatic sprinkling device for road friction coefficient tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195672 CN203259890U (en) | 2013-04-17 | 2013-04-17 | Automatic sprinkling device for road friction coefficient tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203259890U true CN203259890U (en) | 2013-10-30 |
Family
ID=49472440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320195672 Expired - Fee Related CN203259890U (en) | 2013-04-17 | 2013-04-17 | Automatic sprinkling device for road friction coefficient tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203259890U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031395A (en) * | 2019-04-24 | 2019-07-19 | 佛山市公路桥梁工程监测站有限公司 | Cornering ratio test macro and method, water injector, road table water film thickness control method |
| CN112956962A (en) * | 2021-03-19 | 2021-06-15 | 湖南炬神电子有限公司 | Robot of sweeping floor with function of disinfecting |
-
2013
- 2013-04-17 CN CN 201320195672 patent/CN203259890U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031395A (en) * | 2019-04-24 | 2019-07-19 | 佛山市公路桥梁工程监测站有限公司 | Cornering ratio test macro and method, water injector, road table water film thickness control method |
| CN110031395B (en) * | 2019-04-24 | 2021-12-10 | 佛山市公路桥梁工程监测站有限公司 | Transverse force coefficient testing method and road surface water film thickness control method |
| CN112956962A (en) * | 2021-03-19 | 2021-06-15 | 湖南炬神电子有限公司 | Robot of sweeping floor with function of disinfecting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20210417 |