CN2518133Y

CN2518133Y - Environmental protective clock

Info

Publication number: CN2518133Y
Application number: CN01258433U
Authority: CN
Inventors: 罗淦
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-07
Filing date: 2001-12-07
Publication date: 2002-10-23
Anticipated expiration: 2011-12-07

Abstract

The utility model relates to an environment-friendly clock, and comprises a face frame, a back plate, a power, a sensor, a central processor, a control circuit, a character style drive circuit, and a display screen, etc. The sensor is connected with the central processor, and transfers the measured environment signal to the central processor, the processed signal is sent to the character style drive circuit and the display screen connected with the character style drive circuit to display the corresponding environment index. A plurality of different sensors and the circuit of the sensors accomplish the detection of a great variety of environment indexes, after the environment indexes are transformed through the voltage frequency, the inspection of the circuit signal to the sensors is accomplished through the special-purpose central processor, and the special-purpose central processor processes the circuit signal. A time signal is produced by the interior of the processor, the detecting signal and the time signal control the automatic cycle through the central processor and the corresponding digital circuit on the exterior, and display screen circularly displays the detected information through the character style drive circuit.

Description

A kind of Environmental protective clock

Technical field:

The utility model relates to the main equipment that a kind of environment monitoring shows, refers in particular to a kind of Environmental protective clock.

Background technology:

The display device of the existing large-scale digital dock that has the display environment index, the equipment that only can show traffic noise, mainly be arranged on the crossing of heavy traffic, but this equipment the situation that time and single noise are monitored can only be shown, a plurality of indexes of environment can not be in demonstration, embodied.

Summary of the invention:

The purpose of this utility model is to provide a kind of Environmental protective clock, can be extensive use of in public, and the detection and the demonstration of time and multiple environmental index are provided, and provides relevant environmental data on the one hand, can improve the environmental consciousness of the public and society on the other hand.

Realize Environmental protective clock of the present utility model, comprise compositions such as face frame, backboard, power supply, sensor, central processing unit, control circuit, font driving circuit, display screen, sensor links to each other with central processing unit, the ambient signal of transmit measuring is given central processing unit, through in signal after handling deliver to the font driving circuit and show corresponding environmental index with the display screen that is attached thereto.

The a plurality of different sensor of Environmental protective clock inside and the detection that circuit is finished multiple environmental index thereof behind voltage-frequency conversion, are finished by the central processing unit of special use the circuit signal of sensor are patrolled and examined, and it is handled.Time signal also produces by processor is inner, and detection and time handle through central processing unit and outside corresponding digital circuit control Automatic Cycle, is shown the information of detection in the display screen circulation by the font driving circuit.

Sensor comprises temperature sensor, humidity sensor, ambient noise sensor, air mass sensor.Temperature sensor is the TMP35G temperature sensor, and is highly sensitive, is used for testing environment temperature.Humidity sensor is the HS11 humidity sensor, is used for testing environment humidity, adopts solid-state polymer structure, and high quick-recovery and response time are arranged.Ambient noise sensor is a MIC electret formula sensor, and this kind sensor bulk is little, and frequency response is wide, is used to finish the picking up signal to environmental noise.Air mass sensor is the AS38L semiconductor gas sensor.Central processing unit is an AN2518 high-precision multi-path monolithic chip.The drive current that the AN2518 central processing unit adopts dynamic retaining to retouch type of drive is less, for driving big font, the character code dot matrix that adopts the high brightness luminescent triode to form shows, finish dynamic retaining by eight D-latch 74HC373 and retouch conversion with quiescent current, the section of at least No. 9 pin outputs of No. 32 pin of central processing unit AN2518 selects signal to be latched by turn by eight D-latchs, the position of 24 to No. 28 pin of central processing unit selects signal to deliver to No. 11 pin that latch control end of corresponding position 74HC373, when No. 11 pin are high level, section selects signal to pass through, then latch during for low level, via TIP142 driven for emitting lights pipe.The font driving circuit is provided with the index evaluation circuit, and the index evaluation circuit is transferred to the integrating circuit that A21 to A28 forms with the bound and the work indicator signal of passage 3, passage 4 through 7 optocouplers, and integrating circuit is retouched former dynamic retaining and transferred stationary singnal to.In the font driving circuit, be provided with photoresistance.Its resistance can reduce when the light of environment was brighter, and A34 exports high level, and the DC voltage of transformer output is increased, improve the brightness that shows, otherwise can reduce brightness, but still keep clear.

Adopt Environmental protective clock of the present utility model, finish testing by novel sensor, the precision height, good stability, and treatment circuit is simple, and core adopts AN2518 high precision monolithic instrument chip to form, and can detect, show, control four tunnel analog quantitys respectively, the high precision time signal is also produced by chip, has simplified circuit.Font drive to adopt " quiescent current " technology can improve the display efficiency of luminotron, adopts the brightness automatic control to be convenient to the use of Environmental protective clock display screen, utilizes index evaluation to show simultaneously to be with mode intuitively to demonstrate testing result, and the method for demonstration is simple and reliable.

Description of drawings:

Fig. 1 is the circuit diagram of detection and central processing unit.

Fig. 2 is font driving circuit figure.

Fig. 3 is a power circuit diagram.

Fig. 4 is the profile synoptic diagram.

Fig. 5 is a structural representation.

Specific embodiment:

Extremely shown in Figure 5 as Fig. 1, Environmental protective clock comprises face frame 6, backboard 1, power supply, sensor, central processing unit, control circuit, font driving circuit, display screen 5 etc., temperature sensor is the TMP35G temperature sensor, sensitivity 10mv/ ℃, measurement range is-40 ℃～+ 150 ℃, its precision is ± 0.2 ℃, be used to the ambient air temperature that detects here, humidity sensor is the HS11 humidity sensor, be used for testing environment humidity, adopt solid-state polymer structure, precision is 3%RH, measurement range 0～100%RH.The variation of its peripheral circuit of HS11 A1, A2 LM358 humidity changes the electric capacity of HS11, and the oscillatory circuit that A1 forms also changes thereupon, and the output voltage of frequency-voltage conversion circuit of the F/V that forms through A2 also changes thereupon.Ambient noise sensor is a MIC electret formula sensor, and after A4, A5, A6 rectification, amplifier, filtering, the comparatively level and smooth DC voltage of the sound pressure level of neighbourhood noise has been reacted in output one.Air mass sensor is the AF38L semiconductor gas sensor.The AF38L sensor all can make its change in resistance for the variation of harmful gas in the air, detects air quality all sidedly, and A3 is its amplifier.

Central processing unit is an AN2518 high-precision multi-path monolithic chip.The detection signal of four tunnel reaction varying environment indexes is delivered to A7 to A10 analog switch CD4066 respectively, its break-make of analog switch is controlled by No. 8 pin to 5 pin of central processing unit AN2518, the conducting successively of A7 to A10, each detection signal is sent to No. 7 pin of V/F conversion IC LM331 successively, detectable voltage signals is converted to a frequency signal of following this change in voltage by LM331, delivers to No. 14 pin of central processing unit and handle after the anti-phase isolation of A11.Central processing unit AN2518 finishes patrolling and examining, show and controlling of four road environmental indexs.The maximum range of every road signal, the minimum number of divisions, scale, display cycle, upper lower limit value, accuracy are demarcated calibration by keyboard to set up.For time showing is added Automatic Cycle in the cycle, be provided with the control circuit of forming by A12～A20 and A35, A36, make AN2518 energy Automatic Cycle display environment exponential sum time signal.

As shown in Figure 1, the section of 5 LED charactrons of No. 32 pin to 39 pin output of AN2518 central processing unit demonstration testing result is selected signal, and No. 24 pin to 28 pin select signal for the position.No. 21 pin to 23 pin and No. 32 pin to 39 pin are finished the reading scan of these 17 functional indicator lights of A6 to H7.Pilot lamp is installed on the internal circuit board, is used to dispatch from the factory indicate the function of chip when advancing line unit dish setup parameter.

Be provided with storer and link to each other with central processing unit, concrete all setup parameters that can be 24CO2 storer memory AN2518, data also can permanent memory after power failure.Standby power supply can make chip externally cut off the power supply still to keep correct clock signal after a week.

No. 18, No. 19 pin connect 12M crystal oscillator precision and answer high 6ppm, and by 20P variable capacitance fine setting clock accuracy.No. 9 pin is the start reset terminal, and this end pulse makes chip reset when powering at every turn.

As shown in Figure 2, the AN2518 central processing unit adopts the drive current of dynamic scan type of drive less, for driving big font, the character code dot matrix that adopts high brightness LED to form shows, finish the conversion of dynamic scan and quiescent current demonstration by eight D-latch 74HC373, section selects signal to be latched by turn by 74HC373, and the position selects signal to deliver to No. 11 pin that latch control end of corresponding position 74HC373.A21 to A28 is an integrating circuit, transfers former dynamic scan to stationary singnal.A21, A22 are controlled by the lower limit indicator signal of passage 3, passage 4, if when being controlled by A23, the A24 output high level of position radix point signal, promptly chip slapper is when operating conditions, and the lower limit pilot lamp is arbitrary lights for passage 3, passage 4, thereby makes " excellent " character bright.Character " this index " is controlled by the operating conditions indication of passage 3, passage 4 and central processing unit AN2518.A25, A26 are controlled by the upper limit indicator signal and the operating conditions indicator signal of passage 3, passage 4, drive " poor " character through TIP142.If the upper and lower limit indication is all not bright, A30 can export a high level, finally makes " qualified " character bright.A37 is controlled by the time showing state, shows the time output low level, can close whole index evaluation circuit.

In the font driving circuit, be provided with photoresistance Rg.Its resistance can reduce when the light of environment was brighter, and A34 exports high level, and the DC voltage of transformer output is increased, improve the brightness that shows, otherwise can reduce brightness, but still keep clear.

As shown in Figure 4, the profile of Environmental protective clock and common display screen are similar, as shown in Figure 5, electronic components such as power transformer 4, circuit board 8, sensor box 7 are installed in the lower space of Environmental protective clock, various sensors have been housed in the sensor box, high brightness LED all is fixed on the luminotron installing plate 2 by printed words, and before character forming board 3 was installed in installing plate, the obstruct bar by the font setting on it made the font adjacent strokes interference-free.Frosted display screen 5 all is red with luminotron, makes font brightness even.Display screen adopts than dark colour frosted display screen when outdoor.Backboard 1 adopts waterproof construction with face frame 6.

Claims

1, a kind of Environmental protective clock, comprise face frame, backboard, power supply, sensor, central processing unit, control circuit, font driving circuit, display screen etc., it is characterized in that sensor links to each other with central processing unit, transmit the ambient signal of measuring and give central processing unit, signal is after treatment delivered to the display screen that is attached thereto and is shown corresponding environmental index.

2, Environmental protective clock as claimed in claim 1 is characterized in that described sensor comprises temperature sensor, humidity sensor, ambient noise sensor, air mass sensor.

3, Environmental protective clock as claimed in claim 2 is characterized in that described temperature sensor is that TMP35G temperature sensor, humidity sensor are that HS11 humidity sensor, ambient noise sensor are that MIC electret formula sensor, air mass sensor are the AF38L semiconductor gas sensor.

4, Environmental protective clock as claimed in claim 1 is characterized in that described central processing unit is an AN2518 high-precision multi-path monolithic chip.

5, Environmental protective clock as claimed in claim 1 is characterized in that the font driving circuit adopts the circuit mode of quiescent current to drive demonstration.

6, Environmental protective clock as claimed in claim 1 is characterized in that being provided with photoresistance and intednsity circuit in the font driving circuit.