CN201716268U - Additional device measuring luminous intensity coefficient of raised pavement marker - Google Patents

Abstract

The utility model discloses an additional device for measuring the luminous intensity coefficient of a protruding road sign, which comprises a bottom plate, a support plate, an upper panel and a clamping device. The bottom plate is provided with a groove that can be fixed by bolts, and is connected with a test platform of an absolute method measuring device. , the two sides of the bottom plate are connected to the upper panel through the support plate, the support plate is vertical, and the upper panel is horizontal. Connect with the clamping parts on the upper panel. The clamping part includes the upper circular clamping surface, and the top of the clamping surface is a threaded tightening support rod, which is connected to the clamping part and corresponds to the clamping part. The connection is also provided with matching threads. The utility model provides an additional fixture for measuring the luminous intensity coefficient of a raised road sign with an absolute method, which can ensure the accuracy, stability and consistency of the angle when the raised road sign rotates at a specified angle during the sample measurement process, and control the levelness, verticality Accuracy and ensuring that the light source is aligned with the center of the sample.

Description

An additional device for measuring the luminous intensity coefficient of raised road signs

technical field

The utility model relates to an additional device for measuring the luminous intensity coefficient of a raised road sign.

Background technique

The basic function of retroreflective materials is to effectively transmit the information carried by traffic facilities to the visual organs of drivers and passengers by using their retroreflective characteristics through the irradiation of motor vehicle headlights, thereby improving the nighttime visibility of the facilities.

Retroreflective materials are widely used in the transportation industry. They are mainly used in traffic safety facilities such as traffic signs, road markings, and raised road signs, and play an important role in ensuring traffic safety. Retroreflective materials and facilities are widely used in highway construction and are key factors affecting the quality of traffic engineering.

The protruding road sign is a protruding marking block fixed on the road surface and used as a marking line, which can be used to mark the dividing line of the opposite carriageway, the dividing line of the same direction carriageway, the edge line of the carriageway, etc. About 300 protruding road signs are used for every extended kilometer in expressway construction. By the end of 2008, 6,400 kilometers of new expressways have been added. It is estimated that nearly 2 million protruding road signs will be used in expressway construction in 2008 alone. A large number of retroreflective materials and facilities like raised road signs have been applied to highway construction, and their quality level has seriously affected the overall level of engineering construction. Therefore, effective evaluation of the quality of retroreflective materials and facilities is an extremely important task in the current transportation industry. work.

Retroreflective performance is the most critical technical index to investigate whether the quality of retroreflective materials such as marking lines is reliable. It is the primary factor to measure its optical performance in all aspects of material research, production, sales, use and maintenance. Therefore, measuring the retroreflection coefficient is the most direct and effective means to evaluate the performance of retroreflective materials (facilities). Therefore, the test of the retroreflection coefficient of traffic markings has become one of the test indicators related to the quality of traffic markings, so the measurement technology of the retroreflection coefficient is very high.

The composition of retroreflection measurement standard device:

Retroreflection measurement unit, sample placement area, standard A light source, incident angle adjuster, observation angle adjuster and control system, etc.

The protruding road sign samples in this device are directly placed in the sample placement area. The disadvantage is that the sample cannot be fixed and rotated at a specified angle during measurement, and it is not convenient to control the horizontality and verticality, and it cannot ensure that the light source is aligned with the center of the sample.

The invention provides an additional device for measuring the retroreflection coefficient of raised road signs, corresponding to the sample placement area for absolute method measurement, and aiming at the characteristics of raised road marks and the requirements of retroreflection measurement, it can ensure that the measurement process of raised road signs samples is at a specified angle Stability and consistency during rotation, and the functions of controlling levelness, verticality and ensuring that the light source is aligned with the center of the sample.

Utility model content

The purpose of the utility model is to provide an additional device for measuring the luminous intensity coefficient of a raised road sign.

The purpose of this utility model is to realize through the following technical solutions:

An additional device for measuring the luminous intensity coefficient of raised road signs has been added to the above-mentioned "retroreflection measurement standard device", including a bottom plate, a support plate, an upper panel, and a clamping device, and a groove that can be fixed by bolts is provided on the bottom plate. The two sides are connected to the upper panel through the support plate, and are connected to the clamping part on the upper panel. The clamping part includes a front circular clamping surface, and the rear part of the clamping surface is a threaded tightening support rod, and the tightening support rod is connected to the clamping part and corresponds to the clamping part The joints are also provided with matching threads.

What the present invention provides is an additional device for measuring the luminous intensity coefficient of a raised road sign by an absolute method, which can ensure the stability and consistency when the sample is rotated at a specified angle during the measurement process, as well as control the horizontality and verticality and ensure that the light source is in contact with the sample. Center alignment etc.

Description of drawings

The utility model will be described in further detail below according to the accompanying drawings and embodiments.

Fig. 1 is a structural diagram of an additional device for measuring the luminous intensity coefficient of a raised road sign according to an embodiment of the present invention.

In the figure: 1. bottom plate; 2. support plate; 3. upper panel; 4. clamping part; 5. circular clamping surface; 6. tighten the support rod.

Fig. 2 is a working principle diagram of the utility model.

Detailed ways

As shown in Figure 1-2, an additional device for measuring the luminous intensity coefficient of protruding road signs includes a base plate 1, a support plate 2, an upper panel 3, and a clamping device 4, and a groove that can be fixed by bolts is provided on the base plate 1, and the base plate The two sides of 1 are connected to the upper panel 3 through the support plate 2, and are connected to the clamping part 4 on the upper panel 3. The clamping part 4 includes a front circular clamping surface 5, and the rear part of the clamping surface 5 is a threaded tightening support rod 6, and the tightening support rod 6 is connected to the clamping part 4 , and the joints corresponding to the clamping parts 4 are also provided with matching threads.

The invention provides an additional fixture for measuring the luminous intensity coefficient of a raised road sign with an absolute method, which can ensure the stability and consistency of the marking line during the sample measurement process when it is rotated at a specified angle, as well as control the horizontality and verticality and ensure that the light source is consistent with the light source. Sample center alignment, etc.

For raised road signs, the parameter to measure their retroreflective performance is the luminous intensity coefficient (R _I ), which refers to the luminous intensity (I) of the retroreflector in the observation direction and the width of the retroreflector on a plane perpendicular to the direction of incident light. The ratio of illuminance (E _⊥ ), expressed in candela per lux (cd·lx ^-1 ).

According to the above description about the specific implementation of the additional device, the working principle of the retroreflection measurement standard device is further elaborated as follows:

Place the standard sample (retroreflector to be measured) on the additional device of the incident angle adjuster test platform, and adjust to the corresponding measurement geometric conditions (incident angle/observation angle) through the control system. After the system is stabilized, read the measured value of the luminous intensity coefficient _R1 , where _R1 is given by the following formula:

${\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; I</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; I</span>}}{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{<span\; class="notranslate">\; \&perp;</span>}}$

In the formula, R _I is the luminous intensity coefficient of the sample, and the unit is cd lz ^-1 ; I is the luminous intensity of the photodetector reflected by the sample into the retroreflective measurement unit, and the unit is cd; E _⊥ is the standard A light source projected to The vertical illuminance at the center of the sample, in lx.

Claims (4)

1. attachment device of measuring protuberant guide post luminous intensity coefficient, comprise base plate, back up pad and top panel, clamp device, it is characterized in that, be provided with the groove of available bolt on base plate, be connected with the test platform of absolute method measuring equipment, the dual-side of base plate is connected with top panel by back up pad, be connected with clamping part on the plate in the above, described clamping part comprises top clamping surface, and the top of described clamping surface is to screw support bar, and the described support bar that screws is connected on the clamping part.

2. a kind of attachment device of measuring protuberant guide post luminous intensity coefficient according to claim 1 is characterized in that the junction of corresponding clamping part also is provided with the screw thread that matches.

3. a kind of attachment device of measuring protuberant guide post luminous intensity coefficient according to claim 1 is characterized in that the described support bar that screws has screw thread.

4. a kind of attachment device of measuring protuberant guide post luminous intensity coefficient according to claim 1 is characterized in that described clamping surface is rounded.

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