CN214309130U - Brightness detector suitable for tunnel - Google Patents
Brightness detector suitable for tunnel Download PDFInfo
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- CN214309130U CN214309130U CN202120421643.9U CN202120421643U CN214309130U CN 214309130 U CN214309130 U CN 214309130U CN 202120421643 U CN202120421643 U CN 202120421643U CN 214309130 U CN214309130 U CN 214309130U
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Abstract
The utility model discloses a luminance detector suitable for tunnel, including signal acquisition and compensating circuit, preceding stage amplifier circuit, 4 ~ 20mA generating circuit, input output and lightning protection circuit and display circuit, signal acquisition and compensating circuit signal output are connected with preceding stage amplifier circuit, preceding stage amplifier circuit signal output is connected with 4 ~ 20mA generating circuit and display circuit respectively, 4 ~ 20mA generating circuit signal output is connected with input output and lightning protection circuit, signal acquisition and compensating circuit (1) comprise reference power supply, detection photosensitive tube Q102, compensation photosensitive tube Q101 and resistance R101, 4 ~ 20mA generating circuit (3) comprise XRT115 and second peripheral circuit, the second peripheral circuit comprises precision resistance R301 and precision resistance R302, the utility model has the advantages of reasonable design, be convenient for to the little tunnel luminance outside the hole luminance of luminance scope, The change of the brightness of the entrance section and the middle section in the hole and the brightness value can be accurately detected, and the detection effect is improved.
Description
Technical Field
The utility model relates to a detect technical field, concretely relates to luminance detector suitable for tunnel.
Background
In the operation process of the tunnel, the maintenance cost and the power consumption cost of the tunnel are very high, wherein the lighting system accounts for the most part of the electromechanical power consumption of the tunnel, and the tunnel lighting has the condition of over lighting, so that the waste of electric energy is caused2) The luminance range of the entrance section is 57 to 116 (cd/m)2) The middle section has a luminance in the range of 1 to 6 (cd/m)2) The tunnel brightness detector is a uniform range, the brightness of the tunnel entrance section and the brightness of the middle section are small in brightness range, accurate detection cannot be achieved due to the change of the brightness value, the accurate detection of the brightness directly influences the effect of the tunnel control system, and therefore the suitable brightness detector plays a vital role in a tunnel lighting system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned problem that exists among the prior art, provide a luminance detector suitable for tunnel, be convenient for to entrance luminance, interlude luminance in luminance range little tunnel hole external brightness, the hole, the change of luminance value is accomplished the accurate detection, improves detection effect.
In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:
the utility model provides a luminance detection appearance suitable for tunnel, includes signal acquisition and compensating circuit, preceding stage amplifier circuit, 4 ~ 20mA generating circuit, input/output and lightning protection circuit and display circuit, signal acquisition and compensating circuit signal output are connected with preceding stage amplifier circuit, preceding stage amplifier circuit signal output is connected with 4 ~ 20mA generating circuit and display circuit respectively, 4 ~ 20mA generating circuit signal output is connected with input/output and lightning protection circuit.
Preferably, in the luminance detecting apparatus for tunnel, the signal collecting and compensating circuit is composed of a reference power supply, a detecting photosensitive tube Q102, a compensating photosensitive tube Q101 and a resistor R101, the reference power supply is input into DC12V and output DC2.5V to provide standard voltage for the signal acquisition and compensation circuit 1, the detection photosensitive tube Q102 and the compensation photosensitive tube Q101 detect light intensity signals and convert the light intensity signals into resistance signals, when the circuit is in an environment with fixed brightness, the resistance and voltage values at the two ends of the detection photosensitive tube Q102 and the compensation photosensitive tube Q101 are equal, and simultaneously, the positive pole and the negative pole of the power amplifier are respectively connected to play the roles of mutual compensation and zero drift value reduction, the voltage at the two ends of the resistor R101 is used as the collected voltage, when the light intensity value of the whole circuit changes, the voltage collected by the resistor R101 changes along with the change of the voltage, and meanwhile, the collected voltage is used as the input voltage of the power amplifier.
Preferably, in the luminance detecting apparatus for a tunnel, the preceding stage amplifying circuit includes a power amplifier, a first peripheral circuit, a zeroing circuit and a calibration circuit, the first peripheral circuit includes a resistor R102, a resistor R103, a resistor R202 and a resistor R204, the zeroing circuit includes an adjustable resistor W201, the calibration circuit includes an adjustable resistor W202 and an adjustable resistor R203, the resistor R102 and the resistor R103 are used as input resistors of the power amplifier, the resistor R202 is used as a feedback resistor to amplify a signal, the resistor R204 is used as a balance resistor to reduce a null shift, when the power amplifier circuit is zero, the adjustable resistor W201 is adjusted to be zeroed, the adjustable resistor W202 and the adjustable resistor R203 share an output voltage of the power amplifier, and an amplification coefficient of the adjustable resistor W202 is used as a light intensity value to amplify the standard available voltage signal.
Preferably, in the luminance detecting instrument for a tunnel, the 4 to 20mA generating circuit is composed of an XRT115 and a second peripheral circuit, the second peripheral circuit is composed of a precision resistor R301 and a precision resistor R302, and a voltage signal converted by light intensity is connected to an input end of the XRT115 through the precision resistor R301 and the precision resistor R302, so that a standard 4 to 20mA signal is output from an output end of the XRT 115.
Preferably, in the luminance detecting apparatus for a tunnel, the input/output and lightning protection circuit is an RC and LC filter lightning protection circuit composed of a terminal, a switch, an inductor and a capacitor, so as to provide a power supply for the whole system and output an output 4-20 mA signal.
Preferably, in the above brightness detector for a tunnel, the display circuit is composed of a standard power supply, a digital voltmeter and a socket, the LM7805 is used as the standard power supply, the DC12V is input, the DC5V is output, the indicator lights are turned on when the output is normal, the digital voltmeter displays whether the detection value signal is correct, and if the signal value is not correct, the digital voltmeter calibrates the detection value signal through the adjustable resistor W202, so that the display circuit can conveniently display whether the detection value signal is correct.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model has the advantages of reasonable design, through the accurate detection to entrance luminance, interlude luminance in the luminance outside the tunnel hole, the hole, make lighting control system carry out intelligent control to lamps and lanterns and eliminate "black hole effect" under the prerequisite that satisfies the standard requirement completely and improve driving safety nature, furthest practices thrift the electric energy.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic circuit diagram of the range-adjustable luminance detector of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
the circuit comprises a signal acquisition and compensation circuit, a 2-preceding stage amplification circuit, a 3-4-20 mA generation circuit, a 4-input-output and lightning protection circuit and a 5-display circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a brightness detector suitable for a tunnel includes a signal collecting and compensating circuit 1, a pre-amplifier circuit 2, a 4-20 mA generating circuit 3, an input-output and lightning protection circuit 4 and a display circuit 5, the signal collecting and compensating circuit 1 is connected to the pre-amplifier circuit 2 via signal output, the pre-amplifier circuit 2 is connected to the 4-20 mA generating circuit 3 and the display circuit 5 via signal output, the 4-20 mA generating circuit 3 is connected to the input-output and lightning protection circuit 4 via signal output, the signal collecting and compensating circuit 1 is composed of a reference power supply, a detecting photosensitive tube Q102, a compensating photosensitive tube Q101 and a resistor R101, the reference power supply is input to DC12V and output DC2.5V to provide a standard voltage for the signal collecting and compensating circuit 1, the detecting photosensitive tube Q102 and the compensating photosensitive tube Q101 detect a light intensity signal and convert the light intensity signal into a resistor signal, when the circuit is in an environment with fixed brightness, the resistance values and voltage values at two ends of a detection photosensitive tube Q102 and a compensation photosensitive tube Q101 are equal, and are respectively connected to the anode and the cathode of a power amplifier to perform mutual compensation and reduce a null shift value, the voltage at two ends of a resistor R101 is used as the collected voltage, when the light intensity value of the whole circuit is changed, the voltage collected by the resistor R101 is changed along with the change, and the collected voltage is used as the input voltage of the power amplifier, the pre-stage amplifying circuit 2 comprises the power amplifier, a first peripheral circuit, a zero adjusting circuit and a calibrating circuit, wherein the first peripheral circuit comprises a resistor R102, a resistor R103, a resistor R202 and a resistor R204, the zero adjusting circuit comprises an adjustable resistor W201, the calibrating circuit comprises an adjustable resistor W202 and an adjustable resistor R203, the resistor R102 and the resistor R103 are used as the input resistor of the power amplifier, and the resistor R202 is used as a feedback resistor to amplify signals, the resistor R204 is used as a balance resistor to play a role in reducing zero drift, when the power amplifier circuit is subjected to zero drift, the adjustable resistor W201 is adjusted to be zero, the adjustable resistor W202 and the adjustable resistor R203 share the output voltage of the power amplifier, the amplification coefficient of the adjustable resistor W202 is adjusted to serve as a voltage signal which can be amplified to be standard by a light intensity value, the 4-20 mA generating circuit 3 consists of an XRT115 and a second peripheral circuit, the second peripheral circuit consists of a precision resistor R301 and a precision resistor R302, the voltage signal converted by the light intensity is connected to the input end of the XRT115 through the precision resistor R301 and the precision resistor R302, the output end of the XRT115 can output a standard 4-20 mA signal conveniently, the input output and lightning protection circuit 4 is an RC and LC filtering lightning protection circuit consisting of a terminal, a switch, an inductor and a capacitor, a power supply and an output interface can be provided for the whole system conveniently, and the display circuit 5 is composed of a standard power supply, a switch, an inductor and a capacitor, The digital voltmeter and the socket are formed, the LM7805 is used as a standard power supply, the DC12V is input, the DC5V is output, the indicator light is turned on when the output is normal, the digital voltmeter displays whether a detection value signal is correct, and if the signal value is not correct, the digital voltmeter is calibrated through the adjustable resistor W202, so that the display circuit 5 can conveniently display whether the detection value signal is correct.
The first embodiment is as follows:
when the voltage output interface and the 485 interface are not added, a specific application of the embodiment is as follows: and (3) precise detection:
1. a calibration stage: putting the equipment into a dark environment, checking whether zero drift exists through a digital voltmeter in the display circuit 5, zeroing the equipment through an adjustable resistor W201 in the zeroing circuit, outputting 4mA by the equipment, putting the equipment into the environment with the required full-scale standard brightness, amplifying and converting the standard brightness to the standard voltage by adjusting the adjustable resistor W202, outputting 20mA by the equipment, and finishing the debugging of the equipment;
2. measuring stage, namely, putting the equipment into an actual environment, and converting an actual light intensity value according to an output current value;
the detection steps comprise a calibration stage and a measurement stage, so that the method is suitable for any range, and is convenient for accurately detecting the brightness outside the tunnel, the brightness of the entrance section inside the tunnel and the brightness of the middle section with small brightness ranges, so that the illumination control system can intelligently control the lamp to eliminate the black hole effect on the premise of completely meeting the standard requirement and improving the driving safety, and the electric energy is saved to the maximum extent.
Example two:
when increasing voltage output interface, 485 interfaces, a specific application of this embodiment is: and (3) precise detection:
1. a calibration stage: putting the equipment into a dark environment, checking whether zero drift exists through a digital voltmeter in the display circuit 5, zeroing the equipment through an adjustable resistor W201 in the zeroing circuit, outputting 4mA by the equipment, putting the equipment into the environment with the required full-scale standard brightness, amplifying and converting the standard brightness to the standard voltage by adjusting the adjustable resistor W202, outputting 20mA by the equipment, and finishing the debugging of the equipment;
2. measuring stage, namely, putting the equipment into an actual environment, and converting an actual light intensity value according to an output current value;
the detection steps comprise a calibration stage and a measurement stage, so that the device is convenient to be applied to any range, and is convenient to accurately detect the brightness outside the tunnel, the brightness of the entrance section in the tunnel and the brightness of the middle section with small brightness ranges, so that the illumination control system can carry out intelligent control on lamps to eliminate the black hole effect on the premise of completely meeting the standard requirements and improving the driving safety, the electric energy is saved to the maximum extent, and then the brightness detector applicable to the adjustable range of the tunnel supports various output modes by increasing a voltage output interface and a 485 interface, and is applicable to various controller interfaces.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a luminance detection appearance suitable for tunnel, includes signal acquisition and compensating circuit (1), preceding stage amplifier circuit (2), 4 ~ 20mA generating circuit (3), input/output and lightning protection circuit (4) and display circuit (5), its characterized in that: signal acquisition and compensating circuit (1) signal output is connected with preceding stage amplifier circuit (2), preceding stage amplifier circuit (2) signal output is connected with 4 ~ 20mA generating circuit (3) and display circuit (5) respectively, 4 ~ 20mA generating circuit (3) signal output is connected with input output and lightning protection circuit (4).
2. A luminance detector suitable for a tunnel according to claim 1, wherein: the signal acquisition and compensation circuit (1) is composed of a reference power supply, a detection photosensitive tube Q102, a compensation photosensitive tube Q101 and a resistor R101.
3. A luminance detector suitable for a tunnel according to claim 1, wherein: the pre-stage amplifying circuit (2) is composed of a power amplifier, a first peripheral circuit, a zero setting circuit and a calibration circuit, wherein the first peripheral circuit is composed of a resistor R102, a resistor R103, a resistor R202 and a resistor R204, the zero setting circuit is composed of an adjustable resistor W201, and the calibration circuit is composed of an adjustable resistor W202 and an adjustable resistor R203.
4. A luminance detector suitable for a tunnel according to claim 1, wherein: the 4-20 mA generating circuit (3) is composed of an XRT115 circuit and a second peripheral circuit, and the second peripheral circuit is composed of a precision resistor R301 and a precision resistor R302.
5. A luminance detector suitable for a tunnel according to claim 1, wherein: the input/output and lightning protection circuit (4) is an RC and LC filtering lightning protection circuit consisting of a terminal, a switch, an inductor and a capacitor.
6. A luminance detector suitable for a tunnel according to claim 1, wherein: the display circuit (5) consists of a standard power supply, a digital voltmeter and a socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120421643.9U CN214309130U (en) | 2021-02-25 | 2021-02-25 | Brightness detector suitable for tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120421643.9U CN214309130U (en) | 2021-02-25 | 2021-02-25 | Brightness detector suitable for tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214309130U true CN214309130U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120421643.9U Active CN214309130U (en) | 2021-02-25 | 2021-02-25 | Brightness detector suitable for tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214309130U (en) |
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2021
- 2021-02-25 CN CN202120421643.9U patent/CN214309130U/en active Active
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