Pollution-monitoring taxi roof light with airflow stabilization ability

Abstract

A taxi roof light includes a gas distribution tank, a control module, and a detection module. The gas distribution tank is used to distribute detected gas to each individual sub-sensor. The gas inlet of the gas distribution tank is connected to a gas sampling head. A floc prevention net is installed at the gas inlet. The arrangement of the floc prevention net at the gas inlet and the gas outlet can prevent the unexpected matter from entering the monitoring device to damage the monitoring device.

What is claimed is: 
     
         1 . A taxi roof light comprising a multi-core sensor system, wherein the multi-core sensor system comprises a control module and a detection module; the detection module comprises a sensor module comprising at least two sub-sensor units of a same type; the sub-sensor units operate at a normal operating frequency; the detection module further comprises at least one low-frequency calibration module comprising sub-sensor units of a same type as the sensor module; the sub-sensor units in the low-frequency calibration module operate at an operating frequency much lower than the operating frequency of the sub-sensor units in the sensor module; the multi-core sensor system further comprises a gas distribution tank; the air distribution tank is used to distribute a detected gas to each individual sub-sensor; the gas distribution tank comprises at least one gas inlet and a plurality of gas inlet; and a gas outlet of the detection module is connected to the gas outlet. 
     
     
         2 . The taxi roof light of  claim 1 , wherein a ratio of operating frequencies between the at least two sub-sensor units of the sensor module and the sub-sensor unit of the calibration module is 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 15:1, or 20:1. 
     
     
         3 . The taxi roof light of  claim 1 , wherein when the control module detects one suspected abnormal sub-sensor unit in the sensor module, and judges that the suspected abnormal sub-sensor unit is an abnormal sub-sensor unit; the suspected abnormal sub-sensor unit is isolated and classified into an isolation zone, and the sensor module is degraded, and continues to operate; when the abnormal sub-sensor unit in the isolation zone self-heals, the abnormal sub-sensor unit operates at a lower frequency; the control module monitors the operation of the abnormal sub-sensor unit to judge whether a recovery condition is met; when the recovery condition is met, the abnormal sub-sensor unit is released from the isolation zone and back to the sensor module. 
     
     
         4 . The taxi roof light of  claim 3 , wherein the criteria for defining abnormal behavior of the sub-sensor, comprising: 1) abnormal fluctuation occurred in the sub-sensor unit; 2) abnormal drift occurred in the sub-sensor unit; and 3) abnormal correlation existing among the sub-sensor units. 
     
     
         5 . The taxi roof light of  claim 4 , wherein the gas outlet of the gas distribution tank is connected to the gas inlet of each sub-sensor of the detection module; the detection module is configured to detect the concentration of air pollutants; the control module is configured to receive, analyze and upload the data detected by the detection module. 
     
     
         6 . The taxi roof light of  claim 5 , wherein the multi-core sensor uses multiple sensors to measure air quality at the same time, and the output value is the result of comprehensive calculation of data from the multiple sensors; the data of abnormal sub-sensors needs to be eliminated during data calculation; a method of determining an abnormal sub-sensor is one of the following methods: 1) Average value method; 2) Median method; 3) Correlation coefficient method; 4) Variance method; and 5) Percentage method. 
     
     
         7 . The taxi roof light of  claim 5 , wherein the gas distribution tank is equipped with a semiconductor refrigeration sheet made of metal and capable of heating and dehumidifying the gas distribution tank; the semiconductor refrigeration sheet comprises a hot end and a cold end; the gas distribution tank is directly heated by the hot end of the semiconductor refrigeration sheet; the cold end of the semiconductor refrigeration sheet is connected to a heat dissipation grille; a heat energy is absorbed by the heat dissipation grille and transferred to the gas distribution tank; a humidity sensor is mounted before the gas inlet of the gas distribution tank; the system turns on the semiconductor refrigeration sheet when the humidity of the gas measured by the humidity sensor is greater than a set upper limit; and the system turns off the semiconductor refrigeration sheet when the humidity is less than the set lower limit. 
     
     
         8 . The taxi roof light of  claim 7 , wherein compensation of Flow Rate, Temperature, Power and Pipeline Length using the following methods:
 1) the multi-core sensor uses embedded algorithms to solve the problem of out-of-synchronization of multiple sub-sensors in detecting the sampled gas due to different lengths of intake pipes;   2) a flow rate sensor and a differential pressure sensor are used to obtain the flow rate of the sampled gas, and a fan speed control circuit is added; by controlling the fan speed by the obtained gas flow rate information, the flow rate of the sampled gas is stabilized at a value appropriate to the sensor;   3) a temperature acquisition probe is installed at the sensor or for detected gas; the change relationship of the pollutant concentration values corresponding to different sampling temperature values is obtained experimentally or by temperature characteristic data of the sensor; when in use, the output pollutant results are compensated based on the collected temperature data; and   4) a humidity acquisition device is installed to acquire humidity of the detected gas; the change relationship of the pollutant concentration values corresponding to different sampling humidity values is obtained experimentally or by humidity characteristic data of the sensor; when in use, the output pollutant results are compensated based on the collected humidity data.   
     
     
         9 . The taxi roof light of  claim 3 , wherein a status indicator is installed on the sub-sensor; after the abnormal sub-sensor is identified, the status indicator at the corresponding position on the communication port of the circuit board displays a warning color; and the displays green when the sub-sensor is operating normally. 
     
     
         10 . The taxi roof light of  claim 4 , wherein a status indicator is installed on the sub-sensor; after the abnormal sub-sensor is identified, the status indicator at the corresponding position on the communication port of the circuit board will change to a warning color; the status indicator light is green when the sub-sensor is operating normally. 
     
     
         11 . The taxi roof light of  claim 1 , wherein the sub-sensor unit is one of the following sensors: PM1 sensor, PM2.5 sensor, PM10 sensor, PM100 sensor, sulfur dioxide sensor, nitrogen oxide sensor, ozone sensor, carbon monoxide sensor, VOCs sensor, or TVOC sensor. 
     
     
         12 . The taxi roof light of  claim 4 , wherein the sub-sensor unit is one of the following sensors: PM1 sensor, PM2.5 sensor, PM10 sensor, PM100 sensor, Sulphur dioxide sensor, nitrogen oxide sensor, ozone sensor, carbon monoxide sensor, VOCs sensor, or TVOC sensor. 
     
     
         13 . The taxi roof light of  claim 1 , wherein the sub-sensor unit is a laser particulate matter sensor; the multi-core sensor system improves the accuracy of the sensor module by the following method: a laser power detection device and a laser power control circuit are added, which are configured to compensate for the laser power; the change relationship of the particulate matter concentration corresponding to each laser power value is obtained experimentally; the attenuated data is compensated by the laser power control circuit according to the detection result of the laser power detection device. 
     
     
         14 . The taxi roof light of  claim 4 , wherein the sub-sensor unit is a laser particulate matter sensor; the multi-core sensor system improves the accuracy of the sensor module by the following method: a laser power detection device and a laser power control circuit are added, which are configured to compensate for the laser power; the change relationship of the particulate matter concentration corresponding to each laser power value is obtained experimentally; the attenuated data is compensated by the laser power control circuit according to the detection result of the laser power detection device.