CN216450110U

CN216450110U - Body temperature and flow detection circuit for passengers at bus stop

Info

Publication number: CN216450110U
Application number: CN202121747935.8U
Authority: CN
Inventors: 吴生彪; 朱子婷
Original assignee: East China Institute of Technology
Current assignee: East China Institute of Technology
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-05-06
Anticipated expiration: 2031-07-30

Abstract

The utility model provides a bus stop passenger's body temperature and flow detection circuit, includes button setting circuit, signal display circuit, infrared temperature measurement circuit, voice broadcast circuit. The system calls an infrared photoelectric sensor through a main control chip STC89C52 to detect the number of people entering and exiting from a bus stop door, utilizes an infrared MLX90614 series sensor to measure the temperature of a human body, synchronously transmits and displays the number of people and temperature data to an LCD12864, and synchronously displays the data to a mobile phone APP by combining with HC-05 Bluetooth.

Description

Body temperature and flow detection circuit for passengers at bus stop

Technical Field

The utility model relates to a circuit of a system for detecting the body temperature and the flow of passengers at a bus stop

Background

In the non-computer range, large devices are typically used. The disadvantages are high installation requirements and insufficient stability. Later in the computer field, companies had the intent to use video images to count passenger traffic. But at high cost. There is a need for an accurately installed simple device for bus stop passenger volume statistics.

Disclosure of Invention

The utility model aims to provide a bus stop passenger flow detection circuit integrating passenger flow statistics, Bluetooth transmission and human body temperature measurement. The circuit uses a main control chip STC89C52, an infrared photoelectric sensor is used for detecting the number of people entering and exiting from a bus stop door, an infrared MLX90614 series sensor is used for measuring the temperature of a human body, the number of people and temperature data are synchronously transmitted and displayed to an LCD12864, and HC-05 Bluetooth is used for synchronously displaying the data to a mobile phone APP. The whole system can be used for carrying out key setting circuit, signal display circuit, infrared temperature measurement circuit and voice broadcast circuit.

The circuit comprises an STC89C52 chip U1, an LCD12864 liquid crystal display screen L1, a WTD588D voice sensor U2, E18-D80NK-N photoelectric sensors P1 and P2, an MLX90614 series infrared sensor P3, an HC-05 Bluetooth sensor H1, buttons S1, S2, S3 and S4, a loudspeaker F1, light emitting diodes D1, D2 and D3, resistors R7, R8, R3, R2 and R1, capacitors C1, C2 and C3 and a crystal oscillator X1.

The pin of the singlechip 19 is connected with a C3 capacitor, the pin of the singlechip 18 is connected with a C2 capacitor, C1 and C2 are grounded together, the crystal oscillator X1 is connected with the pins of the singlechip 19 and 18, the pin of the singlechip 9 is connected with a resistor R1, a button S1 and a capacitor C1, R1 is grounded, and S1 and C1 are connected in parallel and are connected with VCC together. The pin 20 of the singlechip is grounded, and the pin 40 is VCC. A pin 1 of an LCD 12864L 1 is grounded, a pin 2 of an L1 is connected with VCC, pins 15 and 19 of an L1 are connected with VCC, a pin 20 is grounded, and pins 7 to 14 of an L1 are correspondingly connected with pins 39 to 32 of a single chip respectively. A pin 2 of the HC-05 chip H1 is connected with VCC, a pin 3 of the H1 is connected with ground, and pins 5 and 6 of the H1 are respectively connected with pins 11 and 10 of the single chip microcomputer.

Pins

27, 26 and 25 of the single chip microcomputer are respectively connected with buttons S2, S3 and S4 correspondingly, and S2, S3 and S4 are grounded together. The 2 pins of P1 are connected with the 21 pins of the singlechip, the 2 pins of P2 are connected with the 22 pins of the singlechip, the 2 pins of P3 are connected with the 28 pins of the singlechip, the 1 pins of P1, P2 and P3 are all connected with VCC, and the 3 pins are all grounded. The pin 8 of U2 is grounded, the pins 10, 11 and 12 of U2 are connected with the

pins

39, 38 and 37 of the singlechip, the

pins

3 and 4 of U2 are connected with the pins 2 and 1 of the loudspeaker F1, the pin 16 of U2 is connected with VCC, the pin 15 of U2 is connected with a diode D1 and a resistor R7, D1 and R7 are connected with VCC in series, the pin 14 of U2 is connected with D3 and D2, and the pins D2 and D3 are connected with VCC in series.

The utility model has the advantages that: the bus stop passenger flow detection system can visually, simply and conveniently detect and count bus stop passenger flow and detect human body temperature, and compared with a common detection system, the system is simple to install and convenient to use, and can accurately detect and display passenger flow and human body temperature.

Drawings

FIG. 1 is a schematic diagram of the structure of bus stop passenger flow detection:

in the figure, U1 is an STC89C52 chip, U2 is a WTD588D voice chip, L1 is an LCD12864 liquid crystal display screen, H1 is a Bluetooth chip HC-05, P1 and P2 are photoelectric sensors E18-D80NK-N, P3 is an infrared sensor MLX90614, F1 is a loudspeaker, D1 is a voice indicator light, S1 is a reset button, S2 is an upper limit adding button, S3 is an upper limit reducing button, and S4 is an upper limit confirming button.

Fig. 2 is a circuit diagram of bus stop passenger flow volume detection.

Detailed Description

The passenger flow detection system is powered on first, and the whole system is initialized, wherein the initialization comprises Bluetooth function initialization, liquid crystal display initialization, voice broadcast initialization and upper limit value initialization. The passenger flow upper limit can be freely set through the three keys, after the confirmation button is pressed down, the body temperature data of field personnel is detected through the infrared sensor, and the data are uploaded to the liquid crystal display and the upper computer. Then the infrared photoelectric sensor starts to detect the passenger flow of the bus stop, continuously scans and collects the detection results of the two infrared sensors in the passage, simultaneously detects the people flow in and out, subtracts one from the residual data, and adds one to the data in and out. And the liquid crystal refreshes and displays the entering number of the remaining people and the temperature of the field personnel in real time. When the door is out and the remaining quantity is detected to be 1, the detection is carried out again. And when the number of the entering people reaches the set upper limit alarm number, starting voice alarm to remind, and performing infrared detection again. When the key is pressed, the number of the upper limit alarm people can be increased or decreased according to different keys.

Claims

1. A bus stop passenger temperature and flow detection circuit comprises an STC89C52 chip U1, an LCD12864 liquid crystal display L1, a WTD588D voice sensor U2, an E18-D80NK-N photoelectric sensor P1 and P2, an MLX90614 series infrared sensor P3 and an HC-05 Bluetooth sensor H1, and is characterized in that: a pin 19 of U1 is connected with a capacitor C3, a pin 18 of an STC89C52 chip is connected with a capacitor C2, C1 and C2 are grounded together, a crystal oscillator X1 is connected with pins 19 and 18 of U1, a pin 9 of U1 is connected with a resistor R1, a button S1 and a capacitor C1, R1 is grounded, and S1 and C1 are connected in parallel and are connected with VCC together; the pin 20 of U1 is grounded, and the pin 40 is VCC; the 1 pin of an LCD 12864L 1 is grounded, the 2 pin of an L1 is connected with VCC, the 15 pin and the 19 pin of an L1 are connected with VCC, the 20 pin is grounded, the 7 pin to the 14 pin of an L1 are respectively and correspondingly connected with the 39 pin to the 32 pin of a U1, the 2 pin of an H1 of an HC-05 chip is connected with VCC, the 3 pin of the H1 is grounded, and the 5 pin and the 6 pin of an H1 are respectively connected with the 11 pin and the 10 pin of the U1; pins 27, 26 and 25 of the U1 are respectively connected with buttons S2, S3 and S4 correspondingly, and S2, S3 and S4 are grounded together; the 2 pin of P1 is connected with the 21 pin of U1, the 2 pin of P2 is connected with the 22 pin of U1, the 2 pin of P3 is connected with the 28 pin of U1, the 1 pins of P1, P2 and P3 are all connected with VCC, and the 3 pins are all grounded; the pin 8 of U2 is grounded, the pins 10, 11 and 12 of U2 are grounded to the pins 39, 38 and 37 of U1, the pins 3 and 4 of U2 are grounded to the pins 2 and 1 of the loudspeaker F1, the pin 16 of U2 is grounded to VCC, the pin 15 of U2 is grounded to diode D1 and resistor R7, D1 and R7 are connected in series to VCC, the pin 14 of U2 is grounded to D3 and D2, and the pins D2 and D3 are connected in series to VCC.