CN212030745U - Infrared body temperature measuring instrument - Google Patents
Infrared body temperature measuring instrument Download PDFInfo
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- CN212030745U CN212030745U CN202020984228.XU CN202020984228U CN212030745U CN 212030745 U CN212030745 U CN 212030745U CN 202020984228 U CN202020984228 U CN 202020984228U CN 212030745 U CN212030745 U CN 212030745U
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Abstract
The utility model relates to an infrared body temperature measuring instrument, in particular to a safety inspection door type temperature measuring instrument for collecting the temperature of the head of a human body, aiming at overcoming the problem of larger temperature measurement precision deviation caused by over-low environmental temperature of the existing external temperature measuring instrument, an infrared temperature sensor is arranged at the cross beam of a door-shaped bracket, and the temperature collecting end of the infrared temperature sensor inclines downwards; the control circuit is arranged in the door-shaped bracket; the infrared temperature-sensitive element, the signal processing circuit and the environment temperature calibration device are all positioned in the metal shell; the platinum resistance temperature sensor is fixed on the baffle, and the baffle can rotate around the rotating shaft of the baffle, so that a light path of the infrared temperature-sensitive element is blocked or allowed to pass through; the first electromagnet and the second electromagnet are fixed on the second side wall; the metal adsorption part is fixed with the baffle plate and is positioned between the first electromagnet and the second electromagnet; when the first electromagnet or the second electromagnet generates magnetic force, the baffle is driven to rotate around the baffle rotating shaft.
Description
Technical Field
The utility model relates to an external thermoscope, concretely relates to door-type thermoscope of safety inspection for gathering human head temperature.
Background
The traditional body temperature measuring instrument, especially an in-vitro non-contact type temperature measuring instrument, is exposed outside when measuring temperature, so that the temperature measuring precision of the temperature measuring instrument is closely related to the ambient temperature, when the ambient temperature is too low or frequently changes, the temperature measuring precision deviation is large, and when the temperature measuring precision changes, an operator cannot know in time, so that a part of temperature measuring data is inaccurate; in addition, the common thermodetector with the temperature correction function needs operators to have professional correction knowledge or needs to adopt a special temperature correction device, which is time-consuming and labor-consuming.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming current external thermoscope because ambient temperature leads to the great problem of temperature measurement precision deviation excessively, provides an infrared body temperature measuring apparatu.
The utility model relates to an infrared body temperature measuring instrument, which comprises an infrared temperature sensor, a control circuit and a door-shaped bracket;
the infrared temperature sensor is arranged at the cross beam of the door-shaped bracket, and the temperature acquisition end of the infrared temperature sensor is inclined downwards; the control circuit is arranged in the door-shaped bracket;
the infrared temperature sensor comprises a metal shell, an infrared temperature-sensitive element, a signal processing circuit and an environment temperature calibration device; the infrared temperature-sensitive element, the signal processing circuit and the environment temperature calibration device are all positioned in the metal shell;
an infrared temperature-sensitive element is fixed on a first side wall in the metal shell, and a temperature sensing end of the infrared temperature-sensitive element is used as a temperature acquisition end of the infrared temperature sensor; the metal shell is provided with a temperature acquisition hole on the second side wall, and the second side wall is opposite to the first side wall;
the environment temperature calibration device comprises a platinum resistor temperature sensor, a baffle, a first electromagnet, a second electromagnet and a metal adsorption part;
the platinum resistance temperature sensor is fixed on the baffle, the baffle is connected to the second side wall through the baffle rotating shaft, and the baffle can rotate around the baffle rotating shaft, so that a light path of the infrared temperature-sensitive element is blocked or allowed to pass through;
the first electromagnet and the second electromagnet are fixed on the second side wall; the metal adsorption part is fixed with the baffle plate and is positioned between the first electromagnet and the second electromagnet; when the first electromagnet or the second electromagnet generates magnetic force, the metal adsorption part is attracted to move towards the first electromagnet or the second electromagnet, so that the baffle is driven to rotate around the baffle rotating shaft;
the temperature signal output end of the platinum resistance temperature sensor is electrically connected with the first temperature signal input end of the control circuit through the signal processing circuit, the temperature signal output end of the infrared temperature-sensitive element is electrically connected with the second temperature signal input end of the control circuit through the signal processing circuit, and the first electromagnetic control signal input end of the first electromagnet and the second electromagnetic control signal input end of the second electromagnet are respectively and electrically connected with the first electromagnetic control signal output end and the second electromagnetic control signal output end of the control circuit.
The utility model has the advantages that: the utility model discloses an infrared body temperature measuring apparatu adopts quick, broad-spectrum infrared ray temperature sensor to add ambient temperature calibrating device, can calibrate infrared ray temperature sensor according to ambient temperature at any time as required, solved current external body temperature measuring equipment and crossed the problem that can't use or temperature measurement precision is poor when ambient temperature is low (below 0 degrees centigrade) or frequent change. The device has the advantages that the temperature measurement precision is not lower than +/-0.2 ℃ at minus 20 ℃, the measured target temperature is not influenced by the ambient temperature, and the accuracy is high. Can be widely applied to public places with dense population, such as stations, docks, airports, institutions, schools, hospitals and the like.
Drawings
Fig. 1 is a schematic structural view of an infrared body temperature measuring instrument of the present invention;
fig. 2 is a schematic structural view of an infrared temperature sensor in the infrared body temperature measuring instrument of the present invention;
fig. 3 is a schematic view of a cross-sectional structure of an infrared temperature sensor in the infrared body temperature measuring instrument of the present invention;
fig. 4 is a schematic view of the fitting structure of the infrared temperature sensor, the sensor holder and the door-shaped holder in the infrared body temperature measuring instrument of the present invention;
fig. 5 is a topological diagram of a signal processing circuit in the infrared body temperature measuring instrument of the present invention;
fig. 6 is an electrical schematic diagram of an infrared body temperature measuring instrument according to the present invention;
fig. 7 is a schematic diagram of a circuit topology structure of a control unit in the infrared body temperature measuring instrument of the present invention;
fig. 8 is a schematic view of an interface circuit topology structure of a circuit control part of the ambient temperature calibration device in the infrared body temperature measuring instrument according to the present invention;
fig. 9 is a schematic view of the interface circuit topology structure of the step motor in the infrared body temperature measuring instrument of the present invention;
fig. 10 is a schematic view of the interface circuit topology structure of the proximity sensing switch in the infrared body temperature measuring instrument according to the present invention;
fig. 11 is a schematic view of the interface circuit topology structure of the temperature display screen in the infrared body temperature measuring instrument according to the present invention;
fig. 12 is a schematic diagram of the interface circuit topology structure of the alarm device in the infrared thermometer of the present invention.
Detailed Description
In a first specific embodiment, the infrared body temperature measuring instrument of the present embodiment includes an infrared temperature sensor 1, a control circuit 2, and a door-shaped bracket 3;
the infrared temperature sensor 1 is arranged at the cross beam of the door-shaped bracket 3, and the temperature acquisition end of the infrared temperature sensor 1 is inclined downwards; the control circuit 2 is arranged in the door-shaped bracket 3;
the infrared temperature sensor 1 comprises a metal shell 1-1, an infrared temperature-sensitive element 1-2, a signal processing circuit 1-3 and an environment temperature calibration device; the infrared temperature-sensitive element 1-2, the signal processing circuit 1-3 and the environment temperature calibration device are all positioned in the metal shell 1-1;
an infrared temperature-sensitive element 1-2 is fixed on a first side wall in the metal shell 1-1, and a temperature sensing end of the infrared temperature-sensitive element 1-2 is used as a temperature acquisition end of the infrared temperature sensor 1; the metal shell 1-1 is provided with a temperature acquisition hole 5 on the second side wall, and the second side wall is opposite to the first side wall;
the environment temperature calibration device comprises a platinum resistor temperature sensor 6, a baffle 7, a first electromagnet 8-1, a second electromagnet 8-2 and a metal adsorption part 9;
the platinum resistance temperature sensor 6 is fixed on a baffle 7, the baffle 7 is connected to the second side wall through a baffle rotating shaft, and the baffle 7 can rotate around the baffle rotating shaft so as to block or allow a light path of the infrared temperature-sensitive element 1-2 to pass through;
the first electromagnet 8-1 and the second electromagnet 8-2 are both fixed on the second side wall; the metal adsorption part 9 is fixed with the baffle 7, and the metal adsorption part 9 is positioned between the first electromagnet 8-1 and the second electromagnet 8-2; when the first electromagnet 8-1 or the second electromagnet 8-2 generates magnetic force, the metal adsorption part 9 is attracted to move towards the first electromagnet 8-1 or the second electromagnet 8-2, so that the baffle 7 is driven to rotate around the baffle rotating shaft;
the temperature signal output end of the platinum resistance temperature sensor 6 is electrically connected with the first temperature signal input end of the control circuit 2 through the signal processing circuit 1-3, the temperature signal output end of the infrared temperature-sensitive element 1-2 is electrically connected with the second temperature signal input end of the control circuit 2 through the signal processing circuit, and the first electromagnetic control signal input end of the first electromagnet 8-1 and the second electromagnetic control signal input end of the second electromagnet 8-2 are respectively electrically connected with the first electromagnetic control signal output end and the second electromagnetic control signal output end of the control circuit 2.
Specifically, the infrared body temperature measuring instrument in the present embodiment employs the door-shaped holder 3, and is therefore particularly suitable for measuring the temperature of a specific part (e.g., forehead) of a human body.
As shown in fig. 1, 3 and 6, the device mainly comprises an infrared temperature sensor 1, a sensor support, a control circuit 2 (not shown in fig. 1 and 3), a proximity sensing switch 13, a camera 14, a temperature display screen 15, an alarm device 16 and a door-shaped support 3.
The infrared temperature sensor 1 is hermetically packaged by a metal shell 1-1, an infrared temperature sensitive element 1-2 (the preferred model is ZTP-315), a signal processing circuit 1-3 (as shown in figure 4) and an ambient temperature calibration device are contained in the metal shell 1-1, and other infrared body temperature measuring instruments do not have the structure of an ambient temperature automatic calibration device.
The above-described ambient temperature calibration device is composed of a baffle plate 7 with a platinum resistance temperature sensor 6 (not shown in fig. 1, 3), an electromagnet 8 (electromagnetic coil), and a support member 4 for supporting the baffle plate 7 and the electromagnet 8.
As shown in fig. 2, a schematic diagram of a circuit topology structure of the control unit 2 is shown, an internal clock of the control unit 2 sets an ambient temperature calibration cycle frequency, when the ambient temperature is calibrated, the control circuit 2 sends a first electromagnetic control signal or a second electromagnetic control signal, one of the two electromagnets 8 generates a magnetic adsorption metal adsorption part 9, the baffle 7 with the platinum resistance temperature sensor 6 is placed in front of a lens of the infrared temperature sensitive element 1-2, the infrared temperature sensitive element 1-2 collects the temperature of the baffle 7 and then compares the temperature measured by the control circuit 2 and the platinum resistance temperature sensor 6 on the baffle 7, and a collection error is calculated so as to perform calibration, and meanwhile, the control circuit 2 selects a pre-stored corresponding temperature conversion curve according to the current ambient temperature, so as to further improve the temperature measurement accuracy.
Fig. 8 shows a schematic diagram of a topology structure of an interface circuit of a circuit control portion in the ambient temperature calibration apparatus.
In a preferred embodiment, this embodiment is a further description of the first embodiment, and in this embodiment, the sensor holder is further included;
the sensor bracket comprises a sensor fixing plate 10, a base 11 and a stepping motor 12;
the base 11 is fixed at the cross beam of the door-shaped bracket 3, and the base 11 comprises a pair of supporting plates;
a sensor fixing plate 10 is fixed with the side wall of the shell of the stepping motor 12, and the sensor fixing plate 10 is positioned between the paired supporting plates;
the stepping motor 12 is a double-shaft extension stepping motor, power output shafts at two ends of the stepping motor 12 are respectively fixed with the supporting plates at the same side, the power output shafts are used as rotating shafts of the fixing plates, and the sensor fixing plate 10 can change the angle relative to the base 11 through the operation of the stepping motor 12;
the infrared temperature sensor 1 is fixed on the sensor fixing plate 10;
the control signal input end of the stepping motor 12 is electrically connected with the control signal output end of the control circuit 2.
In particular, because the temperature sensor in the existing body temperature measuring instrument is fixed in installation position and limited in detection angle, when the height of the measured object (generally, a person whose body temperature is to be measured) is too low or too high, the temperature sensor cannot measure or the measurement data is inaccurate.
Therefore, as shown in FIG. 4, the infrared temperature sensor 1 is mounted on an angle-adjustable sensor holder, the angle adjustment of the sensor holder is driven by a stepping motor 12 (preferred model: 28HS3306B4, not shown in FIG. 4), when the height of the measured object is high, the stepping motor 12 adjusts the sensor holder to increase the detection angle; when the height of the measured target is low, the stepping motor 12 adjusts the sensor bracket to reduce the detection angle.
The schematic diagram of the interface circuit topology of the stepping motor 12 is shown in fig. 9.
In the embodiment, the adjustable sensor support is adopted, the detection range adjusting function is achieved, and the problem of fixed detection angle is solved.
A best embodiment, which is a further description of the first embodiment, further includes a proximity sensing switch 13 and a camera 14;
the proximity sensing switch 13 is fixed outside the door-shaped bracket 3, and a proximity signal output end of the proximity sensing switch 13 is electrically connected with a proximity signal input end of the control circuit 2;
the camera 14 is fixed on the side wall of the infrared temperature sensor 1, the orientation of the camera 14 is consistent with the orientation of the temperature acquisition end of the infrared temperature sensor 1, and the image acquisition signal output end of the camera 14 is electrically connected with the image input end of the control circuit 2.
Specifically, as shown in fig. 1, a camera 14 (preferably, model: sony IMX317) is installed at the bottom center of the door head (beam) of the door-type bracket 3, and the camera 14 may be a monocular high-definition wide-angle camera for acquiring an image of a target to be measured. The camera 14 is directly plugged into the mainboard for use through a USB port.
The detection range of the proximity switch 13 (preferred model: E3F-DS200C4) is preset as a measurement area, when the proximity switch 13 detects that the measured object enters the measurement area, the camera 14 automatically shoots the image of the measured object at a preset reference point, and the height information of the measured object is identified through the existing image identification algorithm pre-configured in the control circuit 2, so that the rotation angle of the stepping motor 12 is controlled to adapt to the height of the measured object.
The schematic diagram of the interface circuit topology of the proximity sensing switch 13 is shown in fig. 10.
Best embodiment, this embodiment is a further description of the first embodiment, and in this embodiment, the temperature display screen 15 (model: 18101BS) is further included;
the temperature display signal input end of the temperature display screen 15 is electrically connected with the temperature display signal output end of the control circuit 2.
Specifically, as shown in fig. 1, the temperature value of the device during the measurement process is displayed on a temperature display screen 15 (preferred model: 18101BS), the device starts to dynamically measure the body temperature of the measured object after the detection angle of the camera 14 is adjusted, and simultaneously the body temperature value during the measurement process is displayed on the display screen 15, which is convenient for the operator or security personnel to check and find problems in time.
The schematic diagram of the interface circuit topology of the temperature display screen 15 is shown in fig. 11.
Best embodiment, this embodiment is a further description of the first embodiment, and in this embodiment, the present embodiment further includes an alarm device 16;
the alarm signal input end of the alarm device 16 is electrically connected with the alarm signal output end of the control circuit 2.
Specifically, as shown in fig. 1, an alarm device 16 (preferably, model: BJ-3) is installed inside the door type bracket 3, and a sound emitting hole is opened on a side wall of the door type bracket 3 for emitting sound of the alarm device 16. An alarm upper limit temperature is preset in the control circuit 2, and when the highest temperature value measured by the device is greater than the set alarm upper limit temperature, the alarm device 16 gives an alarm.
Fig. 12 shows a schematic diagram of the interface circuit topology of the alarm device 16.
In conclusion, the use method of the infrared body temperature measuring instrument comprises the following steps:
when the proximity sensing switch 13 detects that the measured object enters the measuring area, the camera 14 automatically shoots the image of the measured object at a preset reference point and identifies the height information of the measured object, and when the height of the measured object is high, the stepping motor 12 adjusts the sensor bracket and increases the detection angle; when the height of the measured object is low, the stepping motor 12 adjusts the detection angle to be low.
After the device finishes the detection angle adjustment, the device starts to dynamically measure the temperature of the measured target, and simultaneously displays the temperature value in the measurement process on the temperature display screen 15. When the measured maximum temperature value is larger than the set alarm upper limit temperature, the alarm device 16 gives an alarm.
After the device is started, when the device is not used for measurement (non-working), a calibration time interval can be set, for example, every 70s, the ambient temperature calibration device is started, the baffle 7 with the platinum resistance temperature sensor 6 is arranged in front of the lens of the infrared temperature-sensitive element 1-2, the infrared temperature-sensitive element 1-2 collects temperature conversion of the baffle 7 and then compares the temperature conversion with the temperature collected by the platinum resistance temperature sensor 6, a collection error is calculated, and meanwhile, the control circuit 2 selects a corresponding temperature conversion curve according to the current ambient temperature, so that the temperature measurement precision is further improved.
The specific steps of the process are as follows:
1. the set time interval controls the first electromagnet 8-1 or the second electromagnet 8-2 to work through the first electromagnetic control signal or the second electromagnetic control signal, so that the control baffle 7 blocks or lets the light path of the infrared temperature-sensitive element 1-2 open;
2. the infrared temperature-sensitive element 1-2 is packaged by aluminum, and when the infrared temperature-sensitive element 1-2 is placed in a working place, the internal temperature and the external environment temperature of the infrared temperature-sensitive element quickly tend to be consistent.
Therefore, when the baffle 7 blocks the light path of the infrared temperature-sensitive element 1-2, the resistance value output by the platinum resistance temperature sensor 6 is converted into temperature which is used as standard temperature;
the infrared temperature-sensitive element 1-2 collects the temperature of the measuring baffle 7 to generate a collecting voltage, converts the collecting voltage into a collecting temperature, and obtains a difference value between the collecting temperature and the standard temperature as an error;
3. when the baffle 7 passes through the light path of the infrared temperature-sensitive element 1-2, the infrared temperature-sensitive element 1-2 generates a collection voltage when collecting the temperature of the detected target, converts the collection voltage into an output temperature, and corrects the output temperature according to the error until next calibration.
Claims (5)
1. An infrared body temperature measuring instrument is characterized by comprising an infrared temperature sensor (1), a control circuit (2) and a door-shaped bracket (3);
the infrared temperature sensor (1) is arranged at the cross beam of the door-shaped bracket (3), and the temperature acquisition end of the infrared temperature sensor (1) is inclined downwards; the control circuit (2) is arranged in the door-shaped bracket (3);
the infrared temperature sensor (1) comprises a metal shell (1-1), an infrared temperature-sensitive element (1-2), a signal processing circuit (1-3) and an environment temperature calibration device; the infrared temperature-sensitive element (1-2), the signal processing circuit (1-3) and the environment temperature calibration device are all positioned in the metal shell (1-1);
the infrared temperature-sensitive element (1-2) is fixed on a first side wall in the metal shell (1-1), and a temperature sensing end of the infrared temperature-sensitive element (1-2) is used as a temperature acquisition end of the infrared temperature sensor (1); a second side wall of the metal shell (1-1) is provided with a temperature acquisition hole (5), and the second side wall is opposite to the first side wall;
the environment temperature calibration device comprises a platinum resistor temperature sensor (6), a baffle (7), a first electromagnet (8-1), a second electromagnet (8-2) and a metal adsorption part (9);
the platinum resistor temperature sensor (6) is fixed on the baffle (7), the baffle (7) is connected to the second side wall through a baffle rotating shaft, and the baffle (7) can rotate around the baffle rotating shaft so as to block or allow a light path of the infrared temperature-sensitive element (1-2);
the first electromagnet (8-1) and the second electromagnet (8-2) are fixed on the second side wall; the metal adsorption part (9) is fixed with the baffle (7), and the metal adsorption part (9) is positioned between the first electromagnet (8-1) and the second electromagnet (8-2); when the first electromagnet (8-1) or the second electromagnet (8-2) generates magnetic force, the metal adsorption part (9) is attracted to move towards the first electromagnet (8-1) or the second electromagnet (8-2), so that the baffle (7) is driven to rotate around the baffle rotating shaft;
the temperature signal output end of the platinum resistance temperature sensor (6) is electrically connected with the first temperature signal input end of the control circuit (2) through the signal processing circuit (1-3), the temperature signal output end of the infrared temperature-sensitive element (1-2) is electrically connected with the second temperature signal input end of the control circuit (2) through the signal processing circuit, and the first electromagnetic control signal input end of the first electromagnet (8-1) and the second electromagnetic control signal input end of the second electromagnet (8-2) are respectively electrically connected with the first electromagnetic control signal output end and the second electromagnetic control signal output end of the control circuit (2).
2. The infrared thermometer of claim 1 further comprising a sensor holder;
the sensor bracket comprises a sensor fixing plate (10), a base (11) and a stepping motor (12);
the base (11) is fixed at the cross beam of the door-shaped bracket (3), and the base (11) comprises paired supporting plates;
the sensor fixing plate (10) is fixed with the side wall of the shell of the stepping motor (12), and the sensor fixing plate (10) is positioned between the paired supporting plates;
the stepping motor (12) is a double-shaft extension stepping motor, power output shafts at two ends of the stepping motor (12) are respectively fixed with the supporting plates on the same side, the power output shafts are used as rotating shafts of the fixing plates, and the angle of the sensor fixing plate (10) can be changed relative to the base (11) through the operation of the stepping motor (12);
the infrared temperature sensor (1) is fixed on the sensor fixing plate (10);
and the control signal input end of the stepping motor (12) is electrically connected with the control signal output end of the control circuit (2).
3. The infrared thermometer according to claim 2, characterized in that it further comprises a proximity sensing switch (13) and a camera (14);
the proximity sensing switch (13) is fixed outside the door-shaped bracket (3), and the proximity signal output end of the proximity sensing switch (13) is electrically connected with the proximity signal input end of the control circuit (2);
the camera (14) is fixed on the side wall of the infrared temperature sensor (1), the orientation of the camera (14) is consistent with the orientation of the temperature acquisition end of the infrared temperature sensor (1), and the image acquisition signal output end of the camera (14) is electrically connected with the image input end of the control circuit (2).
4. An infrared thermometer according to claim 1, 2 or 3, characterized by further comprising a temperature display screen (15);
and the temperature display signal input end of the temperature display screen (15) is electrically connected with the temperature display signal output end of the control circuit (2).
5. An infrared thermometer according to claim 1, 2 or 3, characterized by further comprising alarm means (16);
and the alarm signal input end of the alarm device (16) is electrically connected with the alarm signal output end of the control circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020984228.XU CN212030745U (en) | 2020-06-02 | 2020-06-02 | Infrared body temperature measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020984228.XU CN212030745U (en) | 2020-06-02 | 2020-06-02 | Infrared body temperature measuring instrument |
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| Publication Number | Publication Date |
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| CN212030745U true CN212030745U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020984228.XU Active CN212030745U (en) | 2020-06-02 | 2020-06-02 | Infrared body temperature measuring instrument |
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| CN (1) | CN212030745U (en) |
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- 2020-06-02 CN CN202020984228.XU patent/CN212030745U/en active Active
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Address after: 150000 building 35-2, high tech Industrial Development Zone, Nangang District, Harbin City, Heilongjiang Province Patentee after: Harbin guotie Technology Group Co.,Ltd. Address before: 150090 35-2 high tech Industrial Development Zone, Nangang District, Harbin, Heilongjiang Patentee before: HARBIN RAILWAY RESEARCH INSTITUTE TECHNOLOGY Co.,Ltd. |
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