TW417073B - Infrared-rays detector - Google Patents

Abstract

In an infrared-rays detector, a pyroelectric element detects existence or movement of a human body, and the output signal of the pyroelectric element is converted to a voltage signal. Then, the voltage signal is subjected to waveform analysis. Then, a detection signal is outputted only when a waveform generated by a human body is detected by the waveform analysis. For example, the voltage signal is amplified at two different frequency ranges, and the amplified signals are used for discriminating a signal due to a human body. Then, a noise such as a popcorn noise of the pyroelectric element is prevented to be detected erroneously as generated by a human body.

Description

ί 417073 Α7 Β7 V. Description of the invention (1) Scope of the invention The present invention relates to an infrared detector for detecting the infrared energy emitted by the human body to detect the existence or movement of the human body. Used to detect infrared rays emitted by the human body. Set the thermoelectric element used for each detection area to output a current corresponding to infrared radiation. Then • In an infrared detector, a current-to-voltage converter converts current to voltage, and a voltage amplifier amplifies the voltage. When the output voltage exceeds the pre-positioning standard, it is determined that a human body is detected, and a detection signal is output, which means that the human body exists or moves in the detection area. The infrared detector is designed to have the frequency characteristics of human movement, and has the characteristic of a band-pass filter, which has a center of the transmission band of about 1 Hz. Then, the sensitivity to the human body is enhanced and malfunctions caused by signals at frequencies that are not related to human movement are prevented. However, the thermoelectric element disadvantageously outputs a one-shot noise called popcorn noise (for example, Japanese Laid-Open Patent Publication No. 350-79679). Some people think that the popcorn noise is due to the generation of unwanted electric charges in the thermoelectric elements, and the unwanted electric charges are caused by focusing on the defects of the thermoelectric plate or the electrode material, or by cutting or the like. The compressive or tensile stress caused by micro-cracks is caused by the poor thermal expansion coefficients of thermoelectric plates, electrodes, supports, adhesives, circuit boards, etc. in thermoelectric elements. First of all, in order to reduce the paper wave scale of popcorn noise such as single-trigger output noise, the Chinese national standard rate (CNS > A4 specification (210X297 mm)) (please read the precautions on the back before filling this page) Order the Intellectual Property Bureau of the Ministry of Economic Affairs wK 工 消 #cooperative society printing 4 1707 3 'Α7 Β7 V. Description of the invention (2> Occurred, it is recommended to optimize the materials of the support, circuit board, conductive adhesive, etc., or change the thermoelectric components Structure. However, even with this proposal, the occurrence of popcorn noise in infrared detectors cannot be completely suppressed, and malfunctions are easily caused by popcorn noise. SUMMARY OF THE INVENTION The present invention intends to solve this problem, and its purpose is to provide a An infrared detector does not operate incorrectly when popcorn noise occurs. An infrared detector according to the present invention includes a thermoelectric element and a current-to-voltage converter that converts a current from the thermoelectric element into a voltage signal. , And a signal processor that executes a wave on a voltage signal received from a current-to-voltage converter only when the waveform generated by the human body is detected by waveform analysis. Analysis. The signal processor can be implemented in various ways, as described below. For example, the signal processor includes an amplifier that amplifies the voltage signal received from the current-to-voltage converter, a frequency analyzer that performs frequency analysis on the output signal of the amplifier, and A judging circuit for detecting a waveform generated by a human body based on a frequency component obtained by a frequency analyzer. For example, the signal processor includes a first amplifier that amplifies a voltage signal received from a current-to-voltage converter in a frequency range, And a second amplifier that amplifies the voltage signal received from the current-to-voltage converter in a frequency range different from the first amplifier, and detects a human body based on the amplitude level ratio of the output signals of the first and second amplifiers Circuit for judging the generated waveform. For example, the signal processor includes a self-current-to-voltage converter (please read the precautions on the back before filling this page) Standards apply to CNS A4 specifications (210X297 mm) • 5- 1 '1 V Α7 ^ _ Β7 _ V. Description of the invention (3) The first voltage amplifier that amplifies the received voltage signal in a frequency range, and the first voltage amplifier that amplifies the voltage signal received from the current-to-voltage converter in a frequency range different from that of the first amplifier. Two amplifiers, a first comparator that compares the output signal of the first amplifier with the first threshold level, a second comparator that compares the output signal of the second amplifier with the second threshold level, and a first comparison based on the first and second comparisons A judgment circuit for detecting a waveform generated by a human body by comparing signals with a device. For example, the signal processor includes an amplifier that amplifies a voltage signal received from a current-to-voltage converter, and a frequency analyzer that performs frequency analysis on the output signal of the amplifier. And a judging circuit for detecting the waveform generated by the human body based on the time dependence of the frequency analysis result of the frequency analyzer. For example, the signal processor includes an amplifier that amplifies the voltage signal received from the current-to-voltage converter, a comparator that compares the output signal of the first amplifier with a threshold level, and a comparator that detects that the amplifier output exceeds The threshold level is a judging circuit that detects the waveform generated by the human body according to the length of time. For example, the signal processor includes a first amplifier that amplifies a voltage signal received from the current-to-voltage converter in a frequency range, and a voltage signal received from the current-to-voltage converter that is different from the first amplifier. In the frequency range of the second amplifier, a first comparator comparing the output signal of the first amplifier with the first threshold level, a second comparator comparing the output signal of the second amplifier with the second threshold level, a measurement The first and second comparators output a signal pulse width and a judgment circuit for detecting a waveform generated by a human body based on the two pulse widths. (Please read the precautions on the back before filling this page) Order the paper size printed by the Employees' Cooperatives of the Smart Finance Bureau of the Ministry of Economic Affairs, using the Chinese National Standard (CNS) A4 * l (210X297 mm) -6- A 7 B7 V. Description of the Invention (4) For example, the signal processor includes an amplifier that amplifies the voltage signal received from the current-to-voltage converter, and measures the rise time of the output signal of the amplifier and detects the body's generation based on the rise time. Waveform judgment circuit

Q For example, the signal processor includes a first amplifier, an output circuit, a second amplifier, a popcorn noise detector, and a controller. The first amplifier converts the voltage signal received from the current-to-voltage converter to The first band-pass filter feature is amplified. The first band-pass filter feature is at the center of the first input frequency band. The output circuit compares the output signal of the first amplifier with a predetermined threshold to output a detection signal. The second amplifier passes the current from The voltage signal received by the voltage converter is amplified by the characteristics of the second band through the filter. The second band pass filter feature has a center of the transmission band at a second frequency higher than the first frequency. The popcorn noise detector is compared with the second The amplifier output signal and a threshold to output the popcorn detection signal. The controller controls at least one current-to-voltage converter 'the first amplifier, the output circuit, the second amplifier and the popcorn noise detector. When the popcorn detection signal of the noise detector is received, it prevents the controller from outputting a detection signal. For example, when the popcorn detection signal from the popcorn noise detector is received, the controller reduces the gain of the current-to-voltage converter at a predetermined time, decreases the gain of the first amplifier at a predetermined time, or The controller reduces the output signal of the output circuit at a predetermined time, decreases the gain of the second amplifier at a predetermined time, or reduces the sensitivity of detecting the popcorn signal by increasing the threshold of the popcorn detector at a predetermined time. degree. When the controller controls at least two of them, a component on the upstream side of the signal flow is controlled at a predetermined time, and its short paper size is generally in accordance with China National Standard (CNS) A4ft grid (210X297 mm) (please first (Read the notes on the back and fill out this page)

-, TT Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 4704 3 α7 ___ Β7_ V. Description of the Invention Two scheduled times. In addition, in the infrared detector, the controller controls the output circuit to output a signal different from the output signal of the first voltage amplifier at a predetermined time when the popcorn detection signal from the popcorn noise detector is received. Analog signals. For example, the different signals are the reference voltage generated in the infrared detector circuit, the ground potential in the infrared detector circuit, the supply voltage from an external voltage source, and the oscillating signal supplied by the oscillator. Alternatively, the controller includes a switch for supplying a detection signal, and when the popcorn detection signal from the popcorn noise detector is received, the output signal of the switch has a high impedance at a predetermined time. One advantage of the present invention is to prevent malfunction of the infrared detector due to popcorn noise. These and other objects of the present invention will be briefly explained by the following description in conjunction with its preferred embodiments and with reference to the accompanying drawings, in which: Figure 1 is a diagram of a monitor area for an infrared detector; Figure 2 is based on this Block diagram of the infrared detector of the invention; Fig. 3 is a time chart of an example of a frequency spectrum caused by a human body in a monitor area; Fig. 4 is a time chart of an example of a frequency spectrum caused by popcorn noise; Block diagram of the infrared detector of the first embodiment 1 Figure 6 is a signal processing flowchart of the infrared detector: (Please read the note on the back before filling this page)

This paper scale is suitable for Chinese families (CNS > A4 size (2 丨 0X297mm) • 8-I · '417073 A7 B7 V. Description of the invention (6) Figure 7 shows the infrared rays according to the second embodiment of the present invention Detector block diagram »Figure 8 is a block diagram of an example of a quasi-scale calculator; Figure 9 is a time chart of a representative waveform of the human body in an infrared detector; Figure 10 is a popcorn noise in the infrared Time chart of representative waveforms caused by the detector; FIG. 11 is a block diagram of an infrared detector according to a third embodiment of the present invention: FIG. 12 is a time chart of representative waveforms caused by a human body in the infrared detector : FIG. 13 is a time chart of representative waveforms caused by popcorn noise in an infrared detector; FIG. 14 is a flowchart according to a fourth embodiment of the present invention; FIG. 15 is an infrared detection method according to the fifth embodiment of the present invention Fig. 16 is a time chart of a representative waveform caused by a human body in an infrared detector; Fig. 17 is a time chart of a representative waveform caused by popcorn noise in an infrared detector; Fig. 18 is based on The sixth embodiment of the present invention Infrared detector block diagram; Figure 19 is a time chart of representative waveforms caused by the human body in the infrared detector. (Please read the precautions on the back before filling this page)-·

* tT Printed on paper by the Zhicang Property Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives, the size of the paper is applicable to the Chinese National Standards (CNS) A4 (210X297 mm) -9- Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 _ _B7_ V. Description of the Invention (7>) FIG. 20 is a time chart of representative waveforms caused by popcorn noise in an infrared detector: FIG. 21 is a block diagram of an infrared detector according to a seventh embodiment of the present invention, and FIG. 2 2 It is a time chart of the representative waveform of the human body in the infrared detector; Figure 2 3 is a time chart of the representative waveform of the popcorn noise in the infrared detector: Figure 2 4 is a signal processor with different types Block diagram of an infrared detector; Figure 25 is a block diagram of an infrared detector according to an eighth embodiment of the present invention; Figure 26 is a time chart of signals in the infrared detector; Block diagram ΓΕΠ of the infrared detector of the ninth embodiment, FIG. 28 is a time chart of signals in the infrared detector: FIG. 29 is a block diagram of the infrared detector according to the tenth embodiment of the present invention; Is infrared detection Time chart of the signals in the signal: Fig. 31 is a block diagram of an infrared detector according to a modification of the tenth embodiment of the present invention: Fig. 32 is a block diagram of an infrared detector according to the eleventh embodiment of the present invention: Fig. 3 3 It is the time chart of the signal in the infrared detector; the paper scale is in accordance with China National Standard (CNS) A4 (210X297 mm) Γ ^ 〇_ (Please read the precautions on the back before filling this page)

A7 __B7_ V. Description of the invention (8) Figure 34 is a circuit diagram of an I / V converter and a switch: Figure 35 is a block diagram of an infrared detector f-rfa rai according to the twelfth embodiment of the present invention. 36 is a time chart for illustrating the operation of the infrared detector; FIG. 37 is an infrared detector method according to the thirteenth embodiment of the present invention.

LrH ΓΒ1 · Block diagram, Fig. 38 is a time chart for illustrating the operation of an infrared detector; Fig. 39 is a frequency characteristic diagram of a buffer circuit in the infrared detector; Fig. 40 is a buffer in the infrared detector Main circuit diagram of the circuit. FIG. 41 is a block diagram of an infrared detector according to the fourteenth embodiment of the present invention. FIG. 4 2 is a time chart for illustrating the operation of the infrared detector. FIG. Block diagram of the infrared detector of the embodiment: Fig. 4 is a circuit diagram of the main parts of the popcorn noise detector in the infrared detector: Fig. 45 is a diagram for illustrating the operation of the popcorn noise detector; Fig. 46 is a time chart for illustrating the operation of the infrared detector; Fig. 47 is a block diagram of the infrared detector according to the sixteenth embodiment of the present invention: Fig. 48 is a chart for illustrating the operation of the infrared detector Time chart; Figure 4-9 is an infrared detector according to the seventeenth embodiment of the present invention l ± ti ΓΒ1 · Rosette · (Please read the precautions on the back before filling out this page) ^ Intellectual Property Bureau of the Ministry of Economic Affairs Employee Consumer Cooperatives printed that this paper size is easy to use Rate (CNS) Α4 Regulation "Grid (210X297mm) -11-417073 A7 ____B7_ V. Description of the invention (9) Figure 50 is a time chart for the operation of the infrared detector: {Please read the note on the back first Please fill in this page again.) Figure 51 is a block diagram of the infrared detector according to the eighteenth embodiment of the present invention; Figure 52 is a time chart for illustrating the operation of the infrared detector; Figure 53 is according to the present invention Block diagram of the infrared detector of the nineteenth embodiment; Figure 5 4 is a time chart for illustrating the operation of the infrared detector: Figure 5 5 is a square diagram of the infrared detector according to the twentieth embodiment of the present invention 6 is a time chart for illustrating the operation of the infrared detector; FIG. 5 7 is a block diagram of the infrared detector according to another example of the twentieth embodiment of the present invention; FIG. 5 8 is a chart for illustrating the infrared detector Operation time chart; Figure 59 is a block diagram of an infrared detector according to a different example of the twentieth embodiment of the present invention: Figure 60 is a time chart for illustrating the operation of the infrared detector; Figure 61 printed by the Office of the Consumer Cooperative is based on the twentieth implementation of the present invention Another example of a block diagram of an infrared detector; Figure 62 is a time chart for illustrating the operation of an infrared detector; Figure 63 is a block diagram of an infrared detector according to a twenty-first embodiment of the present invention; Figure 6 4 is a time chart for illustrating the operation of the infrared detector; a comparison table of the main components • 12- This paper size is applicable to the Chinese national standard (CNS > A4 specification U 丨 0X297 mm) A7 B7 Λ \ 1〇 Τ3: Printed and invented by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs (id 1 thermoelectric element 2 current-to-voltage (I / V) converter 3 signal processor 11 wideband amplifier 12 waveform analyzer 1.3 analog to digital (A / D ) Converter 14 memory device 15 central processing unit 21 first amplifier 22 second amplifier 23 level ratio calculator 24 discriminator 31 first amplifier 32 second amplifier 33 first comparator 34 second comparator 35 discriminator 41 amplifier 42 Comparator 43 Pulse Width Detector 43 First Comparator 44 Second Comparator 45 First Pulse Width Detector 46 Second Pulse Width Detector (Please read the note on the back first Matters then fill out this page)

This paper scale applies Chinese National Standard (CNS) A4 specification (210X297 mm) -13- A7 B7 V. Description of invention (n) Printed by the Intellectual Property Bureau Staff Consumer Cooperative of the Ministry of Economics 47 Waveform discriminator 51 Amplifier 52 Rise time detection Comparator 53 Comparator 54 Discrimination section 61-Voltage amplifier 62 Second voltage amplifier 63 Signal detector section 64 Popcorn noise detector 65 Output circuit 66 Controller 71-Voltage amplifier 72 Second voltage amplifier 73 Signal Detector Section 74 Popcorn Noise Detector 75 Output Circuit 76 Controller 77 Output Controller 81 First Voltage Amplifier 82 Second Voltage Amplifier 83 Letter WL · Detector 84 Popcorn Noise Detector 85 Output Bit Quasi-detector 86 output circuit (Please read the precautions on the back before filling this page)

This paper size is applicable to China National Standard (CNS) A4 specification (210x2i > 7mm) -14- Λ -7 η ί ^ V. Description of the invention (12) 87 Output controller 88 Controller 91 First voltage amplifier 92 Two voltage amplifiers 93 Signal detector 94 Popcorn noise detector 95 Controller 96 Output controller 97 Switching circuit 101 First voltage amplifier 102 Second voltage amplifier 103 Signal detector 104 Popcorn noise detector 105 Controller 106 Switch Circuit 107 Output Controller 111 First Voltage Amplifier 112 Second Voltage Amplifier Jibei 113 Report Duan Huicai 114 Popcorn Noise Detector Bureau 115 Controller Consumption 116 Switch Circuit Fee for 121 First Voltage Printed by Amplifier Co., Ltd. 122 Second voltage amplifier This paper is in accordance with Chinese national standards (CNS > grid (210X297 mm) (Please read the precautions on the back before filling in this page)

-15- Α7 Β7 V. Description of the invention (13) Printed by the Ministry of Economic Affairs, The Cage Property Bureau, Consumer Work Cooperative, 123 Report Section 124 Popcorn Noise Detector 125 Controller 126 Buffer Current 127 Switching Circuit 131 Chapter-^ Voltage Amplifier 132 Second Voltage Amplifier 133 Report Section 134 Popcorn Noise Detector 135 Controller 136 Switch Circuit 137 Switch Circuit 141 First-'Voltage Amplifier 142 Second Voltage Amplifier 143 Report Section 144 Popcorn Noise Detector 145 Switch Circuit 147 Switching Circuit 15 1st-Voltage Amplifier 152 Second Voltage Amplifier 153 Report Section 154 Popcorn Noise Detector 155 Controller 156 Switching Circuit (Read the precautions on the back before filling this page)

This paper uses the Chinese National Standard (CMS) A4 specification (2 丨 0X297 male *) -16- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 4 t70T3 V. Description of the invention (U) 157 Switching circuit 161 Chapter-^ Voltage Amplifier 162 Second voltage amplifier 163 Report section 164 Popcorn noise detector 165 Output circuit 166 Switch circuit 167 Switch circuit 168 Controller 171 First-Voltage amplifier 172 Second voltage amplifier 173 Report section 174 Popcorn noise detection 175 output circuit 176 switch circuit 177 switch circuit 178 controller 181 first-voltage amplifier 182 second voltage amplifier 183 report section 184 popcorn noise detector 185 output circuit 186 first-switch 187 second switch (please read the back first Note: Please fill in this page again.) This paper size is applicable to China National Standards (CNS) A4 standard (210X297mm) -17- V. Description of invention (15) A7 B7 Intellectual property of the Ministry of Economic Affairs Printed by Employee Consumer Cooperatives 189 Third Switch 191th-Voltage Amplifier 192 Second Voltage Amplifier 193 Output Circuit 194 Popcorn Noise Detector 195 Controller 196 Reference Voltage Source 197 External Power Supply 198 Oscillator 201th-Voltage Amplifier 202th Two-voltage amplifier 203 Output circuit 204 Popcorn noise detector 205 Controller 231 First comparator 232 Second comparator 233th — Absolute amplifier circuit 234 Second absolute amplifier circuit 235 Pulse generator 236 — Peak hold Circuit 237 Second peak hold circuit 238 Divider circuit preferred embodiment detailed description (Please read the precautions on the back before filling this page)

Quickly use the Chinese National Standard (CNS) A4 (210X297 mm) of this paper music scale -18- In No. 73 A7 B7 V. Invention Description (16) (Please read the notes on the back before filling this page) Now, Reference drawing, in which the same reference symbols indicate the same or corresponding parts in all views. FIG. 1 shows an example of a monitor area in an optical system for an infrared detector for detecting human body. The monitor area is arranged in two dimensions. The optical system condenses infrared rays from an object existing or moving in the monitor area, and the pyroelectric element in the infrared detector receives the condensed infrared rays from the human body. In FIG. 1, the human body is schematically shown in a circle with a hatching line. The output current of a thermoelectric element is converted into a voltage by a current-to-voltage (I / V) converter. When a signal caused by infrared rays of a human body is detected, a detection signal is output to notify that a human body is detected in the monitor area. In order to avoid false detection of the human body caused by popcorn noise that is prone to occur in thermoelectric elements, the infrared detector of the present invention analyzes the waveform of the signal obtained by the thermoelectric elements. As shown in FIG. 2, the infrared detector includes a pyroelectric element 1, an I / V converter 2, and a signal processor 3. The thermoelectric element 1 set for the monitor area is set to output a current corresponding to infrared rays. The I / V converter 2 printed by the Consumer Cooperative of the 4th Bureau of Intellectual Property of the Ministry of Economic Affairs converts the detected current into a voltage signal. The signal processor 3 analyzes the waveform of the voltage signal only when the waveform generated by the human body is detected by waveform analysis, and the output detection signal is used to condense the infrared rays to the thermoelectric element 1. The optical system is not shown in Figure 2 and later Illustrated figure. Referring to the waveform analysis, Figs. 3 and 4 each show the frequency spectrum of energy on the output current of the thermoelectric element 1 caused by the human body and on the popcorn noise of the thermoelectric element 1. The frequency spectrum caused by the human body mainly has low frequency components, while those caused by popcorn noise extend to higher frequencies. In addition, an external electrical noise also has a high frequency component. It should also be noted that when the human body moves on the monitor 19- this paper size applies the Chinese national standard (CNS > A4 specification (210X297 mm) A7 __B7__ V. Description of the invention (17) area, the signal caused by the human body is continuously output more than A long time, but popcorn noise or external electrical noise only exists for a short time. The signal processor 3 analyzes the waveform of the input signal and discriminates the signal caused by the human body. Then, the signal caused by the human body is of course detected, and Prevent false detection of the human body. Because the detection signal is output after checking the waveform characteristics, malfunctions caused by noise such as popcorn noise are prevented ', and the human body is detected with good precision. The signal processor 3 is made into Various shapes will be described below. Fig. 5 shows a block diagram of an infrared detector according to a first embodiment of the present invention. The infrared detector includes a thermoelectric element 1, a current-to-voltage (I / V) converter 2, and a broadband Amplifier 11 and a waveform analyzer 12. I / V converter 2 converts the output current of thermoelectric element 1 into a voltage signal. Amplifier 11 converts I / V in a sufficiently wide frequency band 2 Output Voltage Amplification >> Waveform Analyzer 1 2 Analysis Amplifier 1 1 Output Voltage Waveform Analyzer 1 2 includes an analog-to-digital (A / D) converter 1 3, a memory device 1 4 and a central processing unit 1 5 (CPU). Analog-to-digital (A / D) converter 13, for example, converts the input signal from amplifier 3 into digital data at a constant time interval. Memory device 1 4 stores digital data. • Central processing unit 1 5 It is used to analyze the waveform based on the digital data received from the A / D converter 13 and the data stored in the memory device 14. The digital data after A / D conversion is stored in the memory device 14 for several seconds. Digital data calculates the frequency distribution of the signal. If the signal of low frequency component has a power greater than a predetermined level, and the signal of high frequency component equal to or higher than tens of hertz has a power less than a predetermined level (please read the note on the back first Please fill in this page again) Order the paper size printed by S Industrial Bone Removal Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size is applicable to China National Standard (CNS) A4 (210X 297 gong) -20- A7 B7 V. Description of Invention (18)A detection signal for the human body is output. Conversely, if signals with high frequency components equal to or higher than tens of hertz have a power greater than a predetermined level, they are judged as noise, and a signal for The detection signal of the human body. Figure 6 shows the signal processing flow of the CPU 15. First, the digital data stored on the waveform in the memory device 14 is received at a predetermined time (S 1 0), and the frequency component is detected on the digital data. Analysis (S12). Then, check whether the waveform data contains low-frequency components (S14). If it is determined that the waveform data does not contain low-frequency components, the flow returns to S1〇. On the other hand, if the waveform data is judged to contain low frequency components, then the waveform data is judged to contain high frequency components (S 16) »If it is judged that the waveform data contains high frequency components, then it is judged that noise is detected. The flow returns to S 1 〇. On the other hand, if it is determined that the waveform data does not contain high-frequency components, a human body detection signal (s 1 8) is output, and the flow returns to S 1 0. FIG. 7 shows an infrared detector according to a second embodiment of the present invention. In this embodiment, the frequency distribution on the signal of the thermoelectric element is analyzed, and the human body is identified based on the signal level ratios in two different frequency ranges. The infrared detector includes a pyroelectric element 1, an I / V converter 2, a first amplifier 2 1 'a second amplifier 2 2, a quasi-ratio calculator 23, and a discriminator 24. The first amplifier 21 amplifies a signal centered in a frequency band of about 1 Hz, and the second amplifier 21 amplifies a signal in another frequency band between tens of hertz and hundreds of hertz > level ratio calculator 2 3 The output level ratios of the first and second amplifiers 21 and 22 are determined. Then, the discriminator 24 compares the ratio with a predetermined volume, and outputs a human detection signal when the ratio is larger than the predetermined volume. (Please read the precautions on the back before filling this page) > Order the paper size printed by the 8th Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to apply the China® furniture ratio (CNS) A4 specification (2 丨 0X297 mm)- 21-.4Π〇 ^ 3 r ^ Α7 Β7 V. Description of the invention (19) (Please read the notes on the back before filling this page) Figure 8 shows an example of the level ratio calculator 2 3 & In the amplifier 23, the signals amplified by the first and second amplifiers 21 and 22 are sent to the first and second comparators 2 3 1, 2 3 2 to individually compare them with the threshold levels. The signals are also sent to the first and second absolute chirp circuits 2 3 3, 234 to obtain their absolute chirp. The pulse wave generator 235 generates a pulse wave signal at a predetermined time when receiving a signal from the comparators 2 3 1, 2 3 2 as a level comparison section, and the pulse wave signal is supplied to the first and second peaks. Circuits 2 3 6 and 2 3 7. The first and second peak hold circuits 2 3 6 and 2 3 7 connected to the first and second absolute frame circuits 2 3 3, 2 3 4 keep the maximum signal in the level comparison section. The divider circuit 2 3 8 distributes the absolute chirp signals received from the first and second peak chirp holding circuits 2 3 6 and 2 3 7. If the quotient is greater than a predetermined level, the discriminator 24 outputs a human detection signal. That is, signals derived from the human body are identified. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Figures 9 and 10 show representative waveforms in the infrared detectors that are attributed to the human body and to popcorn noise. In FIG. 9, since the signal due to the human body has a frequency component equal to or lower than several tens of hertz, the large signal is provided by the first amplifier 21 and the small signal is provided by the second amplifier 22. On the other hand, in FIG. 10, because the signal caused by the popcorn noise has a high-frequency component, both of the amplifiers 21, 2 2 supply a large signal. When the output of the first or second amplifiers 21, 2 2 exceeds the threshold level, the pulse wave generator 2 3 5 outputs a pulse wave signal to the peak hold circuits 2 3 6 and 2 3 7. Then, when the pulse wave signal is received, each of the peak hold circuits 2 3 6 and 2 3 7 holds the voltage peak input to each other in a quasi-comparison period. For the signal shown in Fig. 9 due to the human body, the first peak keeps the circuit paper size and uses the Chinese national sample rate {CNS > Α4 size (210X297 mm) -22- r ΛΠ073 ^ A7 B7 5 Explanation of the invention (20) 2 3 6 is large, while the second 2 3 7 is small. On the other hand, in terms of the waveform caused by the popcorn noise, the peak hold circuit 2 3 6 (Please read the precautions on the back before filling this page) 2 3 7 Both output a large signal. Therefore, with the distributor circuit 2 3 8 and the discriminator 2 4, the waveform caused by the human body and the person caused by the popcorn noise are identified. With one example of the above-mentioned level ratio calculator 23, the level ratio can be obtained in different ways. It is also possible to use the difference between the maximum signals instead of the quotient to discriminate between the signal due to the human body and the signal due to popcorn noise. FIG. 11 shows an infrared detector according to a third embodiment of the present invention. In this embodiment, the frequency distribution on the thermoelectric element signals is analyzed and the human body is identified based on the signal levels in two different frequency ranges. The beta infrared detector includes a thermoelectric element 1, an I / V converter 2, and a first An amplifier 3 1, a second amplifier 3 2, a first comparator 3 3, a second comparator 34, and a discriminator 35. Similar to the first and second amplifiers 21 and 2 printed by the Intellectual Property Bureau employee consumer cooperative of the Ministry of Economic Affairs, the first amplifier 3 1 amplifies the signal centered in a frequency band of about 1 Hz | the second amplifier 3 2 Signal amplification in another frequency band between ten hertz and hundreds of hertz. The signals through the first and second amplifiers 3 1 and 3 2 are supplied to the first and second comparators 3 3, 3 4 to individually compare them with the threshold levels. Then, the discriminator 35 discriminates the signal derived from the human body based on the comparison results of the comparators 3 3 and 3 4. Figures 12 and 13 each show the output signal waveforms due to the human body and popcorn noise. Because the signal due to the human body has a frequency component equal to or less than several tens of hertz, the large signal is provided by the first amplifier 31 and the small signal is provided by the second amplifier 32. Because it is caused by the noise of popcorn -23- This paper size is applicable to the Chinese national sample rate (CNS > A4 specification U 丨 0X297 mm) 417073 A7 B7 V. Description of the invention (21) The signal has high frequency components, and the amplifier 3 Both 1 and 3 2 provide a large signal. So, when the first and second comparators 3 3, 3 4 compare the output signals of the amplifiers 3 1 and 3 2 with the appropriate threshold levels, they are used for the signal of the human body. In other words, the first comparator 33 for the first amplifier 31 outputs a comparison signal, and the second comparator 34 for the second amplifier 32 does not output a comparison signal. On the other hand, it is caused by For popcorn noise or signals due to electrical noise, two comparators 3 3 '3 4 supply output signals. Discriminator section 3 5 outputs a human detection signal when the first comparator 3 3 outputs a comparison signal However, the second comparator 34 does not output a comparison signal. Next, an infrared detector according to the fourth embodiment of the present invention will be described. As far as the signal caused by the human body is concerned, the frequency component is actually a longer time. The display does not change, but is caused by noise such as popcorn noise In terms of signals, they disappear in a short time. In this embodiment, the signals are subjected to frequency analysis, and the human body is identified based on the time dependence of the signals. For example, when the same frequency components exist in the signal for a specific continuous time, The block diagram of the infrared detector outputting a human detection signal is similar to the first embodiment shown in FIG. 3 * It is not shown here. The wideband amplifier 11 amplifies the I / V converter in a sufficiently wide band The output voltage of 2 is supplied to the waveform analyzer 12. The signal 2 has the frequency spectrum distribution shown in Figs. 3 and 4. The waveform analyzer 1 2 has an A / D converter 1 which converts the input waveform into digital signals. A memory device 14 for storing digital data and a CPU 15 for analysis. The data stored in the memory device 14 is updated each time a signal is received from the A / D converter 13 "CPU 15 analyzes its frequency. This paper size applies China National Standards (CNS > A4 size (210X297 mm) (Please read the precautions on the back before filling out this page) Order printed by the Employee Consumer Cooperatives of the Smart Finance Bureau of the Ministry of Economy-24- 4 17073 A7 _B7____ V. The invention explains (22) components and checks the time dependence of the frequency spectrum. When the same frequency components exist in a specific continuous time, the CPU 15 outputs a human detection signal. During the signal processing of the CPU 15, in a time period Analysis of the frequency response rate of the data, if the time length of the low-frequency component with a power greater than the predetermined threshold exceeds the threshold, a human detection signal is output. Alternatively, the change in the frequency component can be, for example, measured by a predetermined time length The signal is detected when the signal exceeds the threshold. Figure 14 shows an example of the signal processing flow of the CPU 15. First, the digital data stored in the memory device 14 on the waveform is received at a predetermined time (S 30), and the frequency components are analyzed on the digital data (S 32). Then, check whether the low-frequency component power in the data is not less than the predetermined power P t (S 3 4) »If it is judged that the power is less than P t, t is reset to 0 (S36), and the flow returns to S30. On the other hand, if it is judged that the power is not less than P t, the time t is increased by one (S 3 8), and then it is judged whether t2Tn (S40). If t < Tn is judged, the flow returns to S30. On the other hand, if it is judged that the time length of the low-frequency component having a power greater than a predetermined value exceeds the threshold T η at t3Tn, a human detection signal is output (S42) »Then, the flow returns to S30. FIG. 15 shows an infrared detector according to a fifth embodiment of the present invention, in which the frequency distribution on the signal of the thermoelectric element is analyzed and the human body is identified based on the time length of the signal in the frequency range attributable to the human body. The infrared detector includes a pyroelectric element 1, an I / V converter 2, an amplifier 41, a comparator 42, and a pulse width detector 43. The amplifier 41 has the characteristics of a band-pass filter, and its transmission and amplification are about in the center (please read the precautions on the back before filling out this page) > · *? Τ Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Standards are applicable to China National Fengfeng (CNS) A4 specifications (210X2S * 7mm) -25- Bu 4 17073 A7 B7 V. Description of the invention (23) (Please read the note on the back before filling this page) 1 Hz Signals in the frequency band to obtain a signal that is derived from the human body. The comparator 41 compares the signal output by the amplifier 41 with a predetermined threshold, and outputs a detection signal when the signal exceeds the threshold. Only when the pulse width exceeds a certain threshold, the pulse width detector 43 outputs a signal. Figures 16 and 17 show representative waveforms due to the human body and popcorn noise in the infrared detector. Signals caused by the human body are longer than those caused by noise such as popcorn noise. In the infrared detector, the amplifier transmits a signal in the frequency range corresponding to the existence of the human body, and when the pulse width detector 4 3 judges that the pulse width of the output signal of the amplifier 4 1 is longer, it outputs a Human detection signal. In this example, the detection signal is generated based on the length of the one-shot output signal from the comparator 41. Alternatively, the detection signal is generated after the pulse width detector 43 receives the signal from the comparator 42 by measuring the pulse width of the signal from the comparator 42. FIG. 18 shows the sixth aspect of the present invention. The infrared detector of the embodiment. In this embodiment, based on the time length of the signals in the two frequency ranges, the frequency distribution on the thermoelectric element signal is analyzed and the human body is identified. Infrared Detector Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, 8th Industrial Cooperative Cooperative, including a thermoelectric element 1, an I / V converter 2, a first amplifier 41, a second amplifier 42, a first comparator 43, a The second comparator 44, a first pulse width detector 45, a second pulse width detector 46 and a waveform discriminator 47. The first amplifier 41 amplifies a signal in a frequency band of approximately 1 hertz in the center, and the second amplifier 41 amplifies a signal in another frequency band between tens of hertz and hundreds of hertz. The first and second comparators 4 3 and 44 each compare from the first and second amplifiers 4 1 * • 26-This paper size uses the Chinese National Standards (CNS) A4 grid (210X297 mm) r 4170 ^ 3 A7 B7 V. Signal and threshold level of invention description (24) 4 2 Figures 19 and 20 show timing diagrams of the output signals of the first and second comparators 43, 44. The first comparator 43 outputs a pulse wave signal having a narrower width for popcorn noise or the like. When the temperature difference between the background and the human body is large and the output signal from the thermoelectric element 1 is large, the first comparator 43 outputs a pulse wave having a long pulse width. On the other hand, when the temperature difference between the background and the human body is small, it outputs a pulse wave with a narrow width. In this case, it is difficult to discriminate between the signal caused by the human body and the noise caused by popcorn. However, the second comparator 44 outputs a signal that is of course used for popcorn noise or the like, but does not output a signal due to the human body because the second amplifier 44 outputs a small signal for the human body. So > a signal due to the human body can of course be detected. As described above, the first and second pulse width detectors 45 and 46 each detect the pulse width of the signal supplied by the comparators 43 and 44, and the waveform discriminator 47 is based on the signals in different frequency ranges. The detection of the pulse width on the discriminates the signal derived from the human body. FIG. 21 shows an infrared detector according to a seventh embodiment of the present invention. In this embodiment, the human body is identified by measuring the instant of a signal. The infrared detector includes a pyroelectric element 1, an I / V converter 2, an amplifier 5 1, a rise time detector 5, 2, a comparator 5 3, and a discrimination section 54. The amplifier 51 has a characteristic with a pass filter to obtain a signal due to the human body. Rise time detector 5 2 outputs rise time by measuring the length of time the signal is output through the amplifier 51 between two different levels. Figures 2 and 2 3 each show the cause of the human body and the cause of the popcorn noise. Paper size adopts Chinese National Standard (CNS) A4 # l (210X297 mm) --------- VI— (Please read the notes on the back before filling this page) Order the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Industrial Poverty Alleviation Cooperative -27- A7 £ 7__ 5. Description of the Invention (25) (Please read the precautions on the back before filling this page) Amplifier 5 1 Output signal and Rise time detector 5 2 Rise time detection测 信号。 Test signal. Popcorn noise or the like rises rapidly and has a short pulse width, while the signal due to the human body rises slowly because the human body enters each monitor area at a slow speed. For a signal due to popcorn noise or the like, the rise time becomes longer, and for a signal due to a human body, it is shorter. If the signal due to the human body becomes larger, the rise time becomes shorter, but the pulse width of the comparison result of the comparator 53 becomes longer. Then, considering the rise time and the pulse width, the discriminator 54 receives the rise time from the rise time detector 52 and the pulse width from the comparator 53, and detects the human body with high precision. Printed by the staff of the Intellectual Property Bureau of the Ministry of Economic Affairs on cooperation in capital consumption—infrared detectors with different types of signal processors according to the present invention will be described with reference to Figs. The infrared detector includes a thermoelectric element 1 'current-to-voltage (I / V) converter 2 and a signal processor. The signal processor includes a first voltage amplifier 61, a second voltage amplifier 61, and a signal detector. Detector section 6 3. A popcorn noise detector 6 4. An output circuit 65 and a controller 66. The output voltage of the I / V converter 2 is amplified by the first voltage amplifier 61 and the second voltage amplifier 62. The first voltage amplifier 61 has a characteristic of a band-pass filter passing component of about 1 Hz, which corresponds to the movement speed of the human body, and the second voltage amplifier 62 is amplified by selecting a frequency higher than the first voltage amplifier 61. The signal received from the I / V converter 2 to detect popcorn noise> The signal detector 6 3 compares the signal output from the first voltage amplifier 61 with a predetermined value of a comparator. The signal received by the amplifier 6 1 has an amplitude exceeding a predetermined threshold, and then it outputs a detection signal to the output circuit 6 5 -28- This paper size is not suitable for a family (CNS M4 specification (210 X 297 mm) 417073 A7 B7 V. Description of the invention (26) 〇 Because the popcorn noise in the thermoelectric element 1 rises much faster than the signal caused by the movement of the human body or the like ', the second voltage amplifier 6 2 will have a frequency higher than The input signal of the first voltage amplifier 61 is amplified. The second voltage amplifier 62 has a characteristic of passing a filter 'its transmission is equal to or higher than several tens of hertz frequency components to identify the noise of popcorn and the cause of human movement. Output However, if a signal at an unnecessarily high frequency is transmitted, the S / N ratio becomes worse and the popcorn noise is immersed in the noise. Then, the second voltage amplifier 62 has a characteristic of a band-pass filter, It transmits frequency components in a transmission band of tens of hertz to hundreds of hertz. When the output of the second voltage amplifier 62 has an amplitude equal to or higher than a predetermined chirp, the popcorn noise detector 64 outputs a popcorn Noise detection signal to the controller 6. When the popcorn noise is detected, the controller 6 6 outputs a control signal to infrared rays such as the I / V converter 2, the first voltage amplifier 61, or the output circuit 65. Components in the detector to prevent false detection signals due to popcorn noise "In a modified example, an amplifier amplifies the output signal of I / V converter 2, and the output voltage of the amplifier is Two filters of different frequencies. The first filter is a band-pass filter with a frequency of about 1 Hz, which corresponds to the movement rate of the human body, and the second filter is a band-pass filter, which transmits from tens to hundreds of Hz. Ingredients " The outputs of the first and second filters are each supplied to the signal detector and the popcorn noise detector. That is, the filter is used to replace the voltage amplifier to analyze the waveform of the signal detected by the thermoelectric element. Applicable to China Standards for Households (CNS) A4 (210X297 mm) < Please read the notes on the back before filling out this page) Order printed by the 8th Consumer Cooperative of the Zhithan Property Bureau of the Ministry of Economy • 29- Zhici Property of the Ministry of Economy Printed by the Bureau ’s Consumer Cooperatives 4 170 73 A7 _B7_ V. Description of the Invention (27) As mentioned above, the output signal of the thermal sensor is detected in two different frequency ranges. Detect. Then, false reports of human presence or movement can be prevented. Therefore, the infrared line detector is very reliable, and it will not turn the wrong output signal when popcorn noise occurs. Various embodiments of this type of signal processing are described below. An infrared detector according to an eighth embodiment of the present invention will be described below with reference to FIGS. 2 5 and 26. As shown in FIG. 25, the infrared detector includes a pyroelectric element 1, an I / V converter 2, a first voltage amplifier 7 1, a second voltage amplifier 7 2, and a signal detector section 7 3, A popcorn noise detector 74 and an output controller 7 7 including a controller 76. The controller 7 6 has a timer circuit and an output circuit 75. The output voltage signal of the I / V converter 2 is supplied to a first voltage amplifier 71 and a second voltage amplifier 72. The first voltage amplifier 71 amplifies the signal received from the I / V converter 2 and sends the output voltage to the signal detector 73. The first voltage amplifier 71 has a characteristic of a band-pass filter passing component of about 1 Hz, which corresponds to the movement speed of the human body. The signal detector 73 compares the signal output from the first voltage amplifier 71 with one of the comparators. If the signal received from the first voltage amplifier 71 has an amplitude exceeding a predetermined threshold, it outputs a detection signal to the output circuit 7 5 »The second voltage amplifier 72 has a feature of a pass filter, which transmits from tens to several Components in a transmission band of 100 Hz. When the second voltage amplifier 72 has an amplitude equal to or higher than a predetermined chirp, the popcorn noise detector 74 outputs a popcorn noise detection signal to the controller 76. The controller 76 has a timer, and when receiving popcorn noise, (please read the precautions on the back before filling this page)

This paper size is applicable to China's furniture ratio (〇 阳 &八; 八 4 洗 # " (2 丨 0 > < 297 mm) -30- Α7 Β7 V. Description of the invention (28) (Please read the note on the back first Please fill in this page again) Output an output restraint signal to the output circuit 7 at a predetermined time 5. When popcorn noise occurs, it quickly decays or is not durable. Therefore, the controller 7 is used to output the output suppression signal The time of the timer is set to a few seconds. As long as the output suppression signal from the controller is not received, the output circuit 7 5 transmits a detection signal through there when receiving the detection signal from the signal detector 73. However, Although the output suppression signal is output by the controller 76, it suppresses the output signal to the outside world, or it does not output a detection signal, even if the detection signal from the signal detector 73 is received. Second, referring to FIG. Describe the operation of the infrared detector, which shows (a) I / V converter 2, (b) second voltage amplifier 72, (c) popcorn noise detector 74, (d) first voltage amplifier 71, (E) Output signals from signal detector 73 and (f) controller 76 The output signal (a) of the I / V converter 2 is sent to the first and second voltage amplifiers 7 1 and 7 2. When the output signal (d) of the first voltage amplifier 7 1 exceeds a predetermined threshold, the signal detection Detector 7 3 judges the presence or movement of the human body in the monitor area to output a detection signal (e). Printed by the Intellectual Property Office of the Intellectual Property Office of the Ministry of Economics and Consumer Cooperatives. On the other hand, the popcorn noise detector 7 4 outputs a The popcorn noise detection signal (b) goes to the controller 76, because when the output signal (c) of the second voltage amplifier 72 exceeds a predetermined threshold, it judges that a popcorn noise is output from the thermoelectric element 1. When receiving When the popcorn noise is detected, the controller 76 outputs an output suppression signal (f) to the output circuit 75 for several seconds. When the output suppression signal is output (herein referred to as output suppression time), the output circuit 7 5 Suppress the detection of the letter paper received from the signal detector 7 3 using the Chinese National Standards (CNS) A4 specification (210X297 mm) -31-Printed by the Consumer Property Cooperative of the Intellectual Property Field of the Ministry of Economic Affairs A7 B7 5. Invention description (29) output to the outside world. Until the suppression time elapses, the detection signal is not output from the infrared detector to prevent malfunction due to popcorn noise. Therefore, because the rise time of the output signal from the second voltage amplifier 72 is greater than that from the first voltage The amplifier 7 is faster. Before the output suppression signal is output, the error detection report due to popcorn noise is not output. As described above, when popcorn noise occurs, the output controller 7 7 is controlled without outputting a signal. * Until the predetermined time elapses. Then, by setting the predetermined time for signal control, an error report due to popcorn noise can be completely prevented. The infrared detector according to the ninth embodiment of the present invention will refer to the figure 2 7 and 2 8 instructions. As shown in FIG. 27, the infrared detector includes a pyroelectric element 1, an I / V converter 2, a first voltage amplifier 8 1, a second voltage amplifier 8 2, a signal detector 8 3, a The popcorn noise detector 84 and an output controller 87, the output controller 87 includes an output circuit 86, an output level detector 85, and a controller 88 with a timer. The basic structure of the infrared detector of this embodiment is similar to the seventh embodiment shown in Figs. When a signal from the first voltage amplifier 81 is received, the output level detector 85 compares the input signal with a predetermined chirp with a comparator. If the input signal level is high, it sends a high level detection signal. The predetermined thresholds for comparison by the signal detector 83 and the output level detector 85 need not necessarily be the same as each other, and they can be appropriately set for the desired detection sensitivity. When the output level of popcorn noise is high, the detector 8 3 can output a detection signal, even if the signal level received from the first voltage amplifier 81 is temporary (please read the precautions on the back before filling this page)

This paper size applies to China® furniture ratio (CNS > Α4 see grid U 丨 〇Χ297mm) -32- 4 Ϊ7073 A7 _ B7_ V. Description of the invention (30) (Please read the precautions on the back before filling this page ) Becomes lower than the predetermined level in the output level detector 85 (refer to the signals (d) and (e) in FIG. 28) = Then, once the high level detection signal is output, the level detector is output 8 5 continues to output a high level detection signal until the signal level received from the first voltage amplifier 81 continuously becomes lower than a predetermined threshold for a predetermined time. Therefore, even if the level of the signal received from the first voltage amplifier 81 becomes lower than the predetermined level, the output of the high-level detection signal will not stop quickly. When the output suppression signal from the controller 8 8 is not received | Received The detection signal is transmitted to the outside when the detection signal from the signal detector 83 is received. However, after the popcorn noise detection signal is output by the popcorn noise detector 84, even if the detection signal from the detector 83 is received or the detection signal is not output to the outside world until the level detection signal The detection signal is inhibited from being output to the outside world until it stops being output. "The Ministry of Economic Affairs and the Ministry of Economic Affairs, the Ministry of Economic Affairs and the Zhenggong Cooperative Co., Ltd. printed the disaster. Next, the operation of the infrared detector will be described with reference to Figs. Output signal (a), one output signal (b) of the second voltage amplifier 82, one output signal (c) of the popcorn noise detector 84, one output signal (d) of one of the first voltage amplifier 81, One of the signal detectors 8 3 outputs a signal (e), and one of the output level detectors 85 outputs a signal (f). The output signal (a) of the I / V converter 2 is supplied to the first and second voltage amplifiers 81 and 82. When the output signal (d) of the first voltage amplifier 81 exceeds a predetermined threshold, the signal detector 83 determines that the human body is present or moved in the detection area, and outputs a detection signal (e). On the other hand, when the output signal (c) of the second voltage amplifier 8 2 is in accordance with Chinese standards (CNS > A4 specification (2 丨 〇χ297 mm) for this paper size -33- 4 t T 0 T 3j Α7 Β7 five 、 Explanation of invention (31) (Please read the precautions on the back before filling in this page) When it exceeds the predetermined time, because a popcorn noise is judged to be output from the thermoelectric element 1, the popcorn noise detector 8 4 outputs a The popcorn noise detection signal (b) goes to the output circuit 86. When the output signal (d) from the first voltage amplifier 81 exceeds a predetermined threshold, the output level detector 85 outputs a high level detector signal (Ί) to the output circuit 86. When the signal from the popcorn noise detector 84 is received, the output circuit 86 is suppressed at the same time. The detection signal received from the signal detector 83 is output to the outside, And it continues to be in a suppressed state until the signal output from the output level detector 85 stops. That is, the output suppression time is after the signal from the popcorn noise detector 8 4 is output until it comes from the output level. The output signal of the detector 8 5 stops. So • It is necessary to properly adjust the reference for the comparator so that the high-level detection signal will be output when the popcorn noise detection signal is output. The Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed as above * on the popcorn After the noise detection signal is received, the output circuit does not output a signal * until the predetermined time has elapsed and the output of the first voltage amplifier does not exceed the predetermined level within the predetermined time. Because the signal control time of the turn-out controller is based on the popcorn The output level of the signal is determined. When the output level of the popcorn noise is small, the signal control is quickly cancelled, and the possibility of error reporting can be reduced. The infrared detector according to the tenth embodiment of the present invention will refer to the figure 2 9 to 3 1 are described below. As shown in FIG. 2 'the infrared detector includes a pyroelectric element 1, an I / V converter 2, a first voltage amplifier 9 1, a second voltage amplifier 9 2, a Signal detector 9 3, a popcorn noise detector 9 4 and a control with a timer as an output controller 9 6 -34- This paper size is based on the Chinese national standard (CNS > Α4Λ 格 ( 210 X297 mm) A7 B7 V. Description of the invention (32) Controller 9 5. The basic structure of the infrared detector in this embodiment is similar to that shown in Figure 25. Second, the operation of the infrared detector is shown in Figure 30. Explained, it shows one output signal (a) of I / V converter 2, one output signal (b) of second voltage amplifier 92, one output signal (c) of popcorn noise detector 94, controller One of the output signals (d) of 95 and one of the output signals (e) of the first voltage amplifier 91 are sent to the first and second voltage amplifiers 9 1 and 92. When the output signal (b) of the second voltage amplifier 92 exceeds a predetermined threshold, the popcorn noise detector 94 judges that a popcorn noise is output by the thermoelectric element 1 and outputs a popcorn noise detection signal ( c) To the controller 9 5 »When the popcorn noise detection signal from the popcorn noise detector 94 is received, the controller 95 outputs an output suppression signal (d) at a predetermined time of several seconds. When the controller 9 5 outputs an output suppression signal, the first voltage amplifier 91 reduces its gain to a degree so that the signal detector 9 3 does not output a detection signal. Then, even if the signal detector 9 3 receives a signal from When the output signal (e) of the first voltage amplifier 91 is considered to be a popcorn noise, the signal does not exceed a predetermined time period, and the detection signal is not sent to the outside. When popcorn noise occurs, because the gain of the signal received by the first voltage amplifier is reduced in a very short time, the possibility of false reporting due to popcorn noise is reduced. Alternatively, as shown in FIG. 31, the switching circuit 97 may be provided between the I / V converter 2 and the first voltage amplifier 91. When an output signal is suppressed, the paper size is applicable to China National Standards (CNS) (210X297mm) -----: ---- T- (Please read the precautions on the back before filling this page) Order the Ministry of Economic Affairs Printed by the Intellectual Property Cooperative of the Intellectual Property Bureau -35- Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 __B7_ V. Description of the invention (33) When output from the controller 9 5, the signal from the I / V converter 2 is not Send to the first voltage amplifier 91. An infrared detector according to an eleventh embodiment of the present invention will be described below with reference to FIGS. 32 and 33. As shown in FIG. 3, the infrared detector includes a thermoelectric element 1 ', an I / V converter 2, a first voltage amplifier 101, a second voltage amplifier 102, a signal detector 103, and a corn The noise detector 104 and an output controller 107 including a controller (timer circuit) 105 and a switch circuit 106. The basic structure of the infrared detector in this embodiment is similar to that shown in FIG. 25. When the controller 105 outputs an output suppression signal, the switch 106 reduces the conversion impedance of the I / V converter 2 to reduce the The signal level of a signal is caused by popcorn noise received from the first voltage amplifier 101. Then, the output signal of the first voltage amplifier 101 does not exceed the predetermined threshold in the signal detector 103, and a malfunction due to popcorn noise can be prevented. Next, the operation of the infrared detector is described with reference to FIG. 33, which shows one output signal (a) of the I / V converter 2, one output signal (b) of the second voltage amplifier 102, and popcorn noise detection. An output signal (c) of one of the controllers 104, an output signal (d) of one of the controllers 105, and an output signal (e) of one of the first voltage amplifiers 101. The output signal (a) of the I / V converter 2 is supplied to the first and second voltage amplifiers 10 and 102. When the output signal (b) of the second voltage amplifier 102 exceeds a predetermined threshold, the popcorn noise detector 10 4 judges a popcorn noise. The paper size is applicable to China National Standards (CNS) A4C grid U 丨 0X297 Mm) ~ (Please read the note on the back before filling in this page)

4 17073 A7 B7 5 'Explanation of the invention (34) (Please read the precautions on the back before filling out this page) The thermoelectric element 1 is output, and a popcorn noise detection signal (c) is output to the controller 105. When the popcorn noise detection signal from the popcorn noise detector 104 is received, the controller 105 outputs an output suppression signal (d) to the switch 106 for several seconds. When the controller 105 outputs the output suppression signal, the switch 106 reduces the conversion impedance of the I / V converter 2. Then, when a popcorn noise occurs, even if the signal detector 103 receives the output signal (e) from the first voltage amplifier 101, the output signal of the first voltage amplifier 101 does not exceed a predetermined threshold, and detects The test signal was not sent to the outside world. As described above, in this embodiment, the gain of the I / V converter 2 is reduced only when the popcorn noise is output. Then, the controller 105 shortens the time for which the output suppression signal is output. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs When the switch 96 is turned off, the infrared detector shown in Fig. 3 is affected by the switch noise, as shown below. Figure 34 shows an example of I / V converter 2 and switch 96. The I / V converter 2 includes an operational amplifier 2 a 'a feedback circuit 2 b and a capacitor 2 b * The switch 1 2 7 is a MOS-FET connected in parallel with the I / V converter 2. Because the I / V converter 2 has a very high impedance, when the switch 96 is operated, a switching noise is generated at a high frequency due to the stray capacitance 2 d in the MO S-F E T. Therefore, to prevent false reports caused by this switching noise is desirable. An infrared detector which can solve this problem according to the twelfth embodiment of the present invention will be described below with reference to Figs. As shown in FIG. 3, the infrared detection device includes a thermoelectric element 1, an I / V converter 2, a first voltage amplifier 1 1 1, a second voltage amplifier 1 1 2, and a paper size applicable to China. Sleepy Home Standard (CNS) A4 Specification (2 丨 0X297 mm) -37-

A7 B7 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives. V. Invention Description (35) 1 Report Section 11 3. — * Popcorn Noise Detector 1 1 4, — Controller 1 1 1 1 5 and a switch Circuit 1 1 6. Thermoelectric element 1 output — ^ Corresponding to the infrared current emitted by the white 1 I monitor area, the I / V converter 2 converts the detection current output by the power source 1 I element 1 into a voltage signal. The voltage signal is supplied to the reading 1 I first and second voltage amplifiers 1 1 1 and 112 ° back 1 1 the first-voltage amplifier 111 amplifies the attention 1 voltage signal received from the I / V converter 2 and sends the result Go to report paragraph 1 1 3. The first voltage amplifier term is 1 I 1 1 1 which has a characteristic of a band-pass filter passing component of about 1 Hz, and its writing I corresponds to the movement speed of the human body. The report section 1 1 3 compares the signal output from the first voltage amplification page 1 1 I 1 1 1 with a predetermined signal of a comparator. If the white first electric 1 1 voltage amplifier 1 11 has an amplitude exceeding a predetermined signal Then its 1 1 outputs a report signal. Order | The second voltage amplifier 1 1 2 has the characteristics of a band-pass filter. Its 1 1 transmits components in the transmission band of tens to hundreds of hertz. • When the second voltage is 1 1 I The output of the amplifier 1 12 has an amplitude equal to or higher than a predetermined value. The popcorn 1 f noise detector 11 4 outputs a popcorn noise detection signal to the controller Λ1 1 5. When receiving the popcorn noise detection signal (d), the controller 1 | 1 1 5 outputs an output control signal (e) to the switching circuit I 1 1 6 β at a predetermined time. Once the popcorn noise is output, even if The signal from the popcorn noise detector 1 detector 1 14 is received. A signal is not white letter 1 to number 1 at the predetermined time T 2 — terminal A is output to B, as shown in Figure 36. So when the switch circuit 1 1 1 1 6 is turned off, even if the switch noise is transmitted to the popcorn noise detector 1 1 1 1 4, the BB m-off circuit 1 1 6 is no longer turned on (refer to the signal (1 | C) in Figure 36). As mentioned above, when popcorn noise occurs in thermoelectric elements, the paper size is applicable to China A standard (CNS) A4 * tfr (210X297 mm) 38- Α7 Β7 V. Description of the invention (36) Human error reports are prevented from being output. In addition, even if switching noise occurs, by reducing the detection sensitivity at a specific time, you can prevent the report from being missed (please read the precautions on the back before filling this page). The infrared detector according to the thirteenth embodiment of the present invention, which can also solve this switching noise problem, will be described below with reference to FIGS. 37 to 40. As shown in Fig. 37, the infrared detector includes a pyroelectric element 1, an I / V converter 2 '-a first voltage amplifier 1 2 1, a second voltage amplifier 1 2 2, and a report section 1 2 3. A popcorn noise detector 1 24, a controller 1 25, a buffer current 1 2 6 and a switching circuit 1 2 7. The pyroelectric element 1 outputs a current corresponding to infrared rays emitted from the monitor area. The I / V converter 2 converts the detection current output by the thermoelectric element 1 into a voltage, and outputs the voltage to the first voltage amplifier 121 and the second voltage amplifier 12 2. Printed by the Consumer Goods Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The first voltage amplifier 121 amplifies the signal received from the I / V converter 2 and sends the result to the report section 1 2 3. The first voltage amplifier 1 2 1 has a characteristic of passing components with a band-pass filter of about 1 Hz, which corresponds to the movement speed of the human body. "Report paragraph 1 2 3 compares the signal output from the first voltage amplifier 1 2 1 with that of a comparator. The predetermined signal, if the signal received from the first voltage amplifier 1 2 1 has an amplitude exceeding the predetermined signal, it outputs a detection signal. On the other hand, the second voltage amplifier 1 1 2 has a band-pass filter feature, which is input from tens to hundreds of hertz, and amplifies a signal received from the I / V converter 2. FIG. 38 is a timing chart for illustrating the infrared detector. When the output (b) of the second voltage amplifier 1 2 2 is equal to or higher than the predetermined value. • 39- This paper music scale is applicable to Chinese poor families. {CNS) A4 size (210 ×: Z97 mm) αΠ〇ί3 Α7 Β7 5 、 Explanation (37) (Please read the precautions on the back before filling this page)

At the amplitudes of Vhl and VI1, the popcorn noise detector 124 outputs a popcorn noise detection signal (d) to the controller 1 2 5. When the popcorn noise is received, the controller 1 2 5 outputs an output suppression signal Q 1 to the buffer circuit 1 2 6 at a predetermined time T 1. When the output control signal Q 1 is received via the buffer circuit 126, the switch 127 reduces the conversion impedance of the I / V converter 2 to reduce the signal level generated by the popcorn noise. Therefore, the output signal (c) of the first amplifier does not exceed the predetermined values Vh 0, V 1 0 of the report section 1 2 3, and the popcorn noise is prevented from being output as a report signal. As mentioned above * By providing a buffer circuit 1 2 6, switching noise is suppressed. As shown in FIG. 40, an example of the buffer circuit 1 2 6 is composed of C, R, and the like, and it adjusts the decay time of the output control signal Q 1 from the output controller 12 5 to the switch circuit 1 2 7. The time constant of the buffer circuit 1 2 6 is determined by C and R. The frequency characteristics of the infrared detector buffer circuit 1 2 6 shown in Figure 3 9 of the poverty alleviation cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs • The time constant is set for the frequency F 0, which is about 1 Hz and about 1 0 0 The most suitable is between Hertz. At about 1 Hz, the gain of the first voltage amplifier 121 becomes maximum 値, and at about 100 Hz, the gain of the second voltage amplifier 122 becomes maximum 値. That is, the gain is set so that the switching noise (a) of N s 1 shown in FIG. 3 is amplified by the first voltage amplifier 1 2 1 but does not exceed the predetermined values VhO, V 1 0. This prevents false reporting of paragraphs 1 2 3. The gain is also set so that the switching noise is also amplified by the second voltage amplifier 1 2 2 but does not exceed the predetermined value Vh 1, V 1 1. This popcorn noise detection signal is provided by the Popcorn Noise Detector -40-This paper size applies to China® furniture standard (CNS > A4 * t grid (210X297 mm) π〇Τ3 Α7 Β7 V. Invention Note (38) 1 2 4 Supply "In an experiment, the most appropriate frequency F0 for supplying a stable output signal was set to about 10 Hz. (Please read the precautions on the back before filling this page) So, by using A small circuit consisting of R, C, and the like. The false report of the detected target caused by the popcorn noise from the thermoelectric element 1 can prevent the switching noise caused by the switch 1 2 7. Even if the switching noise occurs, The infrared detector is very reliable and does not output erroneous output signals when popcorn noise occurs. In addition, although the detection sensitivity is reduced at a specific time, the existence of a human body or a report that cannot be detected can be missed Prevention. The infrared detector according to the fourteenth embodiment of the present invention printed by the 8th Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs will be described with reference to Figs. 41 and 42. The switching noise is a high-frequency signal. It is shown in Fig. 32 Infrared detector The switching noise is amplified by the second voltage amplifier and outputs a popcorn noise detection signal that controls the I / V converter. Then, the output control signal is intermittent and the output of the I / V converter remains at Low, and the sensitivity of infrared detection is reduced. This embodiment uses two timers to solve this problem. As shown in Figure 41, the infrared detector includes a thermoelectric element 1, an I / V converter 2, and a first Voltage amplifier 1 3 1, a second voltage amplifier 132, a report section 133, a popcorn noise detector 1 3 4, a controller 1 3 5, a switching circuit 1 3 6 and another switching circuit 1 3 7 Figure 4 2 is a time chart for illustrating the operation of the infrared detector. The thermoelectric element 1 outputs a current, which corresponds to the detection current output from the thermoelectric element 1 by the infrared I / v converter 2 emitted from the monitor area. Converted into voltage, the voltage is supplied to the first voltage amplifier 1 3 1 and the second electricity • 41-This paper music scale is applicable to the Chinese national standard (CNS > A4A grid (210X297 mm) A7 B7 ___ V. Description of the invention (39) Voltage amplifier 132 = the first voltage amplifier 131 is amplified from I / V The signal received by the converter 2 and sends the result to the report section 1 3 3. The first voltage amplifier 131 has a characteristic of a band-pass filter passing component of about 1 Hz, which corresponds to the human body movement rate. The signal output from the first voltage amplifier 131 and a predetermined threshold of a comparator, if the signal received from the first voltage amplifier 131 has an amplitude exceeding a predetermined threshold, it outputs a report signal. On the other hand, the second voltage The amplifier 1 3 2 amplifies a signal received from the I / V converter 2. The second voltage amplifier 1 3 2 has a band-pass filter feature, and transmits components from tens to hundreds of hertz. When the output of the second voltage amplifier 1 3 2 has an amplitude equal to or higher than the predetermined 値 Vh 1, V 1 1, the popcorn noise detector 1 3 4 outputs a popcorn noise detection signal P 3, such as As shown in Figure 4 2 (b), to the controller 1 3 5. Figure 4 3 shows an example of the popcorn noise detector 1 3 4. As shown in Figure 4 3, the popcorn noise detector 1 3 4 is a window type comparator with two comparators, which determines whether the signal SWI N received from the second amplifier 1 3 2 exceeds the comparator's positive and negative Reference voltages Vh 1, V 1 1. That is, the signal received from the second voltage amplifier 1 3 2 is compared with predetermined reference voltages Vhl, V1 1. If SWIN> Vhl or SWINCV11, the popcorn noise detector 134 judges that a popcorn noise is detected, and outputs a popcorn noise detection signal. When the popcorn noise is received, the controller 1 3 5 outputs an output control signal Q 1 ((d) in FIG. 4 2) to the I / V converter 2 through the switch circuit 1 3 6 at a predetermined time T 1. At the same time, at the scheduled time T2 (please read the precautions on the back before filling in this tile) > Order the printed paper size applicable to the China National Standards (CNS) Α4 # Μί · for ordering and printing on the paper of the Intellectual Property Bureau of the Ministry of Economic Affairs. (2 丨 0X297mm) -42- WT073 Α7 Β7 V. Description of the invention (40) (Please read the precautions on the back before filling this page) The switch circuit 13 7 outputs a gain suppression signal Q 3 (Figure 4 2 of 2 (E)) To the second voltage amplifier 132. Note that when popcorn noise occurs, it decays rapidly or is not persistent. When the popcorn noise was measured, it was found that the pulse width was equal to or shorter than several milliseconds, although the peak-to-peak levels were different. Then • In order to reduce the conversion impedance of the I / V converter 2 and the gain of the second voltage amplifying 1 2 3, the desired time is T 1, T for outputting the output control signal Q 1 and the gain suppression signal Q 3. 2 is set to several seconds, and T 1 < T 2. In addition, the amplitude of the switching noise is about 1 millivolt. Secondly, when the controller 1 35 outputs a gain suppression signal, the switching circuit 1 37 reduces the gain of the second voltage amplifier 13 2. Secondly, when the switching circuit 1 37 is turned off, the signal level of the switching noise generated in the I / V converter 2 decreases, as shown by No u t 2 of the output (b) of the second voltage amplifier 1 32. Printed by the Consumer Cooperative of the Smart Finance Bureau of the Ministry of Economic Affairs, because the output of the second voltage amplifier 1 3 2 does not exceed the predetermined value of the popcorn noise detector 134 値 Vhl and V11, a popcorn noise detection signal is not The popcorn noise detector 1 3 4 outputs, and the switching circuit 1 36 is no longer turned on. However, the gain of the second voltage amplifier 1 2 2 is not set to zero, but is reduced to such an extent that the popcorn noise detection signal due to the switching noise is not output. Therefore, even at time T 2, where the gain suppression signal P 4 is output, as shown in FIG. 4 2 (c), the popcorn noise detector 1 3 4 can detect a large amplitude generated by the thermoelectric element 1. The popcorn noise Nout2 is shown in Figure 42 (b). That is, when the output of I / V converter 2 is controlled, a popcorn with a large amplitude can be eliminated. Secondly, when the output of I / V converter 2 is controlled, -43 · This paper standard is applicable to Chinese national standards. (CNS > A4 specification (210 × 297 mm) A7 B7 V. Description of the invention (41) Popcorn noise with a large amplitude because of the thermoelectric element 1 can be eliminated, and an error report signal detected by an object can be high Precisely prevent {Please read the notes on the back before filling out this page) output. As mentioned above, when a popcorn noise occurs in a thermoelectric element, an error report signal for reporting that an object is detected is prevented = In addition, although the detection sensitivity is reduced at a specific time, the presence or movement of the human body is Missing detected reports are prevented. Thus, an excellent infrared detector is provided. The infrared detector according to the fifteenth embodiment of the present invention will be described with reference to FIGS. The infrared detector includes a thermoelectric element 1, an I / V converter 2, a first voltage amplifier 1 4 1, a second voltage amplifier 1 4 2, a report section 1 4 3, and a popcorn noise detection.器] _ 4 4, a switching circuit 1 4 6 and another switching circuit 1 4 7 The basic structure of the infrared detector of this embodiment is similar to the fourteenth embodiment, but the switch 1 4 7 is used for popcorn miscellaneous The signal detector 1 4 4 instead of the switch circuit 13 7 ° Printed on Figure 4 6 by the Intellectual Property Bureau of the Ministry of Economic Affairs, the Consumer Cooperative, is a time chart for the operation of the infrared detector. When the popcorn noise detection signal P 1 is received, the output controller 1 4 5 outputs an output control signal Q 1 to the I / V converter, 2 via the switch 1 4 6 at a predetermined time T 1, as shown in FIG. 46 ( c) and (d). At the same time, as shown in (e), the output controller 145 outputs an output control signal Q 4 to the popcorn noise detector 1 4 4 via the switch 1 4 7 at a predetermined time T3. When the detection level suppression signal Q 4 is output, the popcorn noise detector 1 4 4 reduces the detection level of the popcorn noise to suppress the popcorn noise -44- This paper is suitable for those who are in trouble «Home Sample Standard (CNS) A4 specification (210X297 mm) AW1. A7 B7 5. Description of the invention (42) (Please read the precautions on the back before filling this page) Detection signal. Specifically, as shown in FIG. 4, the reference voltage Vh 1 moves higher toward Vh 2, or the reference voltage V 1 1 moves lower toward V 1 2. Secondly, in the popcorn noise detector 1 4 4, the output (b) of the second voltage amplifier 142 does not exceed the predetermined value Vh2 or V12, and the popcorn noise detection signal is not detected by the popcorn noise detector. 1 4 4 Output As mentioned above, the popcorn noise has a pulse width equal to or shorter than several milliseconds. Then, in order to reduce the conversion impedance of the I / V converter 2 and the detection level of the popcorn noise detector 1 4 4, the desired one is to output the control signal Q 1 and the detection level stop signal. The output time T 1 and T 2 of Q 4 are set to several seconds, and T 1 < T 2 ^ is printed in the I / V converter by the Intellectual Property Bureau of the Ministry of Economic Affairs, and an N-type MOS — FET acts as an I / V conversion. F ET. However, there will be a case where a P-type MOS-FET is used, and when the control signal is changed from low to high or the direction of the switching noise becomes negative, the switching circuit is turned off. Therefore, when the structure of the switching circuit is determined, the direction of the switching noise of the I / ν converter 2 is uniquely determined. Secondly, when the popcorn noise detection level is reduced, it is not necessary to move both the reference voltages Vhl and VI1, and it is sufficient to move either. When the detection level decreases, the popcorn noise becomes more difficult to detect, and this is originally an unwanted person. However, one of the standard references does not need to be moved, which means that the sensitivity to the direction of the standard reference is not reduced, and the sensitivity to popcorn noise detection is advantageously not reduced in that direction. In addition, if the detection level suppressing signal Q 4 affects the path of a signal, such as the output of the second voltage amplifier 14 2, the impact is based on the cause -45- (6) Rule 4 (box (210 :) < 297 mm) Α7 Β7 V. Description of the Invention (43) The signal of popcorn noise is treated to the same degree. Secondly, we must pay attention to the amplitude and frequency of the signal. However, because the detection level suppression signal Q 4 is sent to the window-type reference voltage terminal of the comparator, the terminal is different from the input terminal for the output of the second voltage amplifier 14 2. Then, the interference between the two signals can be ignored. That is, the detection level can be reduced without directly affecting the path of the popcorn noise signal. As mentioned above, the detection level can be reduced without directly affecting the path of popcorn noise detection. In addition, the sensitivity of popcorn noise detection is not reduced in one direction, and malfunctions can be prevented with high precision. In the infrared detector shown in Fig. 32, the I / V converter 2 and the first voltage amplifier 91 include a complex operation amplifier. When the circuit gain changes, the bias voltage of the amplifier and its DC output signal are affected by the bias voltage or bias current. Then the input of the first voltage amplifier 91 changes like a step signal, and if this signal is amplified, an error report signal is generated. Therefore, even if the bias voltage appears in the amplifier of the I / V converter 2 or the first voltage amplifier 91 and the like, or if a popcorn noise occurs before the signal stabilizes, the desired one is to make the detection of a Object error reporting is blocked. In some embodiments described below, when receiving a popcorn noise detection signal, the controller controls two or more components of the infrared detector. The controller uses a timer to generate a plurality of times to be sent to the ingredients. Time is selected so that in the signal flow, the component on the downstream side is not affected by another component on the upstream side. An infrared detector according to a sixteenth embodiment of the present invention will be described below with reference to Figs. As shown in Figure 4-7, the infrared detector includes this paper size, using the Chinese national standard (CNS > Α4 size (210X297)) (Please read the precautions on the back before filling this page) Order 'Ministry of Economics Wisdom Printed by W Property and Consumer Cooperatives of the Property Bureau -46- A7 B7 r 4170 ^ 3 V. Description of Invention (44) (Please read the precautions on the back before filling this page) A thermoelectric element 1, an I / V converter 2, A first voltage amplifier 1 5 1, a second voltage amplifier 1 5 2, a report section 1 5 3, a popcorn noise detector 1 5 4, a controller 155 with a timer circuit, a switch Circuit 156 and another switching circuit 157. Figure 48 is a time chart for illustrating the operation of the infrared detector. The thermoelectric element 1 outputs a current corresponding to the infrared rays emitted from the monitor area. The I / V converter 2 will The detection current output by the thermoelectric element 1 is converted into a voltage. The voltage signal is sent to both the first voltage amplifier 1 5 1 and the second voltage amplifier 1 5 2. The report section 1 5 3 compares the output from the first voltage amplifier 1 5 1 The predetermined value of the signal and a comparator, if from the first voltage amplifier 1 5 1. The received signal has an amplitude exceeding a predetermined threshold, then it outputs a report signal. On the other hand, the second voltage amplifier 1 5 2 amplifies the signal by selecting a frequency higher than the first voltage amplifier 1 5 1, and Send it to the popcorn noise detector 15 4. When the output of the second voltage amplifier 15 2 has an amplitude equal to or higher than a predetermined chirp, as shown in FIG. 4 8 (b), the popcorn noise Detector 1 5 4 outputs a popcorn noise detection signal, as shown in Figure 4 8 (c). The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the corn from the popcorn noise detector 1 5 4 The noise detection signal is received, and the controller 1 5 5 supplies two different timer wheels T 1 1 and T12. The timer wheel T 1 is a pulse wave signal of the switch 156, with a time width τ 1, the timer The output T 1 2 is the pulse signal of the switch 1 5 7 and has the time width T 2. The timer output T11 with the time width T1 is received by the switch 1 5 6 as shown in Figure 48 (d) to reduce I / V converter 2 -47- This paper size is applicable to China National Fengfeng (CNS) A4 specification (210X297 mm) U〇T 3 A7 _B7_____ V. Description of the invention (45) (Please read the notes on the back before filling this page) Gain at time T1. Secondly, as shown in Figure 48 (f), even if the signal output by the first voltage amplifier 1 5 1 Received by the report segment 1 5 3, which does not exceed the predetermined threshold. Then, a report signal is not output. The time width T 1 is set to be longer than if. Dry milliseconds, which is the output time of the popcorn signal. Secondly, the output of I / V converter 2 is not affected by the signal level of the popcorn noise, and it is only affected by the bias voltage of the amplifier and the like. On the other hand, as shown in Fig. 48 (e), the timer output T12 having the width T2 is sent to the switch 1 5 7 to reduce the gain of the first voltage amplifier 15 1 at time T 2. Time T2 is set to be longer than T1. Therefore, when a stepped input signal affected by the I / V converter and the like is amplified by the first voltage amplifier 1 5 1 and is not detected by the report section 1 5 3, the gain of the first voltage amplifier 1 5 1 decreases. Several seconds. In addition, the ripple effect of the bias voltage of the first voltage amplifier 15 1 is reduced to become smaller than the predetermined value set in the report section 15 3. By appropriately setting time T2, the time required for so-called missed reports is shortened, and false reports that reduce sensitivity can of course be prevented. Printed by the Consumer Goods Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Figure 4 9 is a block diagram of the infrared detector of the seventeenth embodiment. The infrared detector includes a pyroelectric element 1, an I / V converter 2, a first voltage amplifier 1 6 1, a second voltage amplifier 1 6 2, a report segment 1 6 3, and a popcorn noise detection 1 6 4, an output circuit 16 5, a switching circuit 16 6, another switching circuit 16 7 and a controller 1 6 8 with a timer circuit. The basic structure of this embodiment is similar to the sixteenth embodiment. Fig. 50 is a timing chart for illustrating the operation of the infrared detector. -48-This paper size applies to China National Standards (CNS) A4 specifications (2) × 297mm >

, .A V. Description of the invention (46) (Please read the notes on the back before filling in this page) Similar to Figure 4 8 when the popcorn noise detection signal from the popcorn noise detector 1 6 4 is Receiving, the controller 1 6 8 outputs two different timer outputs T 1 and T 1 3. The signal of the pulse width T1 is similar to the corresponding part of the sixteenth embodiment. It reduces the gain of I / V converter 2 at time T1, and the output from I / V converter is only affected by the bias voltage of the amplifier and the like, and has nothing to do with popcorn noise. Therefore, due to the output of the I / V converter 2, the output of the first voltage amplifier 161 exceeds the predetermined threshold of the report section 163 only at a determined time, as shown in Fig. 50 (e). On the other hand, the timer output T 1 3 has a width T3, as shown in Fig. 50 (g), which is sent to the switch 167 to control the output circuit 1 65 at time T3 to suppress the report signal. The pulse wave time of T 3 is set to be longer than T 1 ". Then, the time of the so-called missing report is shortened, and the false report can of course be prevented by the output suppressor. Printed by the Intellectual Property, Staff, and Cooperatives of the Ministry of Economic Affairs Figure 51 is a block diagram of the infrared detector of the eighteenth embodiment. The infrared detector includes a thermoelectric element 1, an I / V converter 2, a first voltage amplifier 171, a second voltage amplifier 172, a report section 173, a popcorn noise detector 174, and an output circuit. 175, a switching circuit 176, another switching circuit 177, and a controller 178 with a timer circuit. The basic structure of the infrared detector is similar to that of the sixteenth embodiment. Fig. 52 is a timing chart for illustrating the operation of the infrared detector. When the popcorn noise detection signal from the popcorn noise detector 1 74 is received, the controller 17 8 outputs two different timer outputs T 1 4 and T 1 5. The timer output T 1 4 is the pulse signal of the switch 1 7 6, -49- This paper size is applicable to the Chinese sample rate (CNS > (2 丨 0X297 mm) Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs i 4 17 0 7 3 at B7 V. Description of the invention (47) With time width T4, timer output T 1 5 is the pulse wave signal of switch 1 7 7 and has time width T 5. Timing with pulse width T 4 The converter output T14, as shown in FIG. 52 (d), is received by the switch 176 to reduce the gain of the I / V converter 2 at time T4 = the width T4 is set to several seconds to several tens of seconds to handle a large enough popcorn Noise signal. As shown in Figure 52 (a), when the output of I / V converter 2 rises and slowly decreases, as the popcorn noise increases, the voltage decreases per second. Then, if the first voltage The gain of the amplifier 1 7 1 returns to the original value. If the popcorn noise is large, the decreasing output signal of the I / V converter 2 may exceed the threshold value. To prevent this situation, the time T 4 is set to be sufficiently large, for example, On the other hand, the timer output T1 5 has a width T5, as shown in FIG. 52 (f), which is sent to the connection to the output The switch 1 7 of the circuit 1 7 5 is output. The output of the report section 1 7 3 is suppressed at time T 5. The time T 5 is set to be slightly longer than T 4. As mentioned above, because the switch circuit is not connected to a circuit that requires high impedance I / V converter, the switching circuit can be constructed more easily. In addition, the output noise is the leakage effect caused by the unnecessary connection, which can reduce the infrared detector according to the nineteenth embodiment of the present invention. Description will be made with reference to Figs. 5 3 and 54. As shown by circle 53, the infrared detector includes a pyroelectric element 1, an I / V converter 2, a first voltage amplifier 181, and a second voltage amplifier 1 8 2 1. A report section 1 8 3. A popcorn noise detector 1 8 4. An output circuit with a timer circuit The paper size is free of China National Standard (CNS) A4 specifications (2 丨 0X297 mm) -50- {Please read the notes on the back before filling this page)

^ 4 170 170 3 A7 B7 V. Description of the invention (48) Printed by the Consumer Affairs Bureau of the Ministry of Economic Affairs X Consumer Bureau 18 5 Switch 1 Example 1 Picture When outputting T 18 6 T 1 2 the timer is output T 6. Reduction of I is similar to the gain and noise of the β-pulse 18 1 amplifier T 6 at the time of the report in the report of 18 1 such as the pressure of movement or from outside, although-the first switch 186, a second switch 187 third 8 9. Infrared 5 4 is used to draw the pulse signal of the 1st embodiment 1 1 ′ T 1 2, it is the switch 1 8 7 and T 1 6 is on. It has the time width / V converter 2 sixteenth and tenth, one In the infrared of the staircase input detector, control the gain of the pulse of time Τ 1 6 with the pulse of time 1 8 8 Τ 1. The seventh embodiment shows that the I / basic structure is similar to that of the detector when the timer 1 8 9 outputs three. The timer outputs T width T1, timing number, and pulse signal with time width. The time it takes to send the wave signal to the switch T1 is about. By reducing I / V converter 2 supply off. Τ 2 is a pulse wave of about several milliseconds, similar to the wave received by the switch 1 8 7 | to reduce the gain of the first voltage. Then, the bias fluctuation in the first voltage amplifier 1 8 1 is affected, and it is sent to the report The sixteenth paragraph of the implementation map. Different timers 1 1 are switch output degrees T 2 and have a time width of 1 8 6-with a number of milliseconds, the V converter 2 and the sixteenth implementation of the popcorn amplifier output only from 18 3 ° with a pulse at a time Wave width until the signal of the first voltage amplifier becomes stable. Then, the output according to the pulse wave signal * 1 8 of T6 is suppressed for a predetermined time. Similarly, missed reports are similarly shortened, and false reports can of course be prevented. As mentioned above, the use of a complex timer output to detect the presence of a human body or an error report can prevent it from being caused by a bias in the amplifier or I / V converter—popcorn noise that occurs before the signal becomes stable. However, detection sensitivity is reduced and missing reports can be prevented. Therefore, this paper standard applies to the national standard of difficulty (CNS > Α4 specification (210X297 male *) (Please read the precautions on the back before filling in this page)

51 r 417073 A7 B7 V. Description of the invention (49) An excellent infrared detector can be provided. (Please read the notes on the back before filling this page) In an infrared detector, it detects infrared rays from the human body and outputs analog detection signals. The analog output fluctuations caused by popcorn noise can be reduced. But it is difficult to completely eliminate. Just after a popcorn noise occurs • The detector does not respond for a predetermined time. However, whether or not the output signal is controlled by the corn flower noise or not, it cannot be discriminated from the output signal. Then, the desired one is that the occurrence of the corn flower noise can be identified by the analog output of the infrared detector. The following embodiments solve this problem by outputting a predetermined analog output at a predetermined time. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The infrared detector according to the twentieth embodiment of the present invention will now be described with reference to FIGS. 5 5 and 56. As shown in Figure 5 | The infrared detector includes a pyroelectric element 1, an I / V converter 2, a first voltage amplifier 1 9 1, a second voltage amplifier 1 9 2, and an analog output terminal. Output circuit 193, a popcorn noise detector 194, a controller 195, and a reference voltage source 196. The infrared detector is formed as an integrated circuit. The reference voltage source 196 is used to supply a reference voltage generated in the integrated circuit. Reference voltage source 196 is an example of a conventional signal | it can be easily discriminated from the output signal based on the signal detected by the thermoelectric element. The output circuit 1 9 3 has a switch that changes the analog output between the reference voltage from the reference voltage source 1 9 6 and the input signal from the first voltage amplifier 1 9 1. The thermoelectric element 1 outputs a current 'which corresponds to Infrared emitted from a monitor area. I / V converter 2 converts the detection current output from thermoelectric element 1 into m voltage. The output voltage is supplied to the 1st voltage amplifier. 1 9 1 This paper is applicable to China's Household Standards (CNS) Regulation 8 < Grid (2 丨 〇 > < 297 mm) -52 · A7 B7 4 17 V. Invention Description (50) and supplied to the second voltage amplifier 192. The first voltage amplifier 1 9 1 amplifies an input signal from the I / V converter 2 and supplies it to the output circuit 1 9 3. The second voltage amplifier 192 has a characteristic like a high-pass filter, which transmits a frequency component equal to or higher than several tens of hertz. It amplifies the output voltage of the I / V converter 2 having a frequency higher than the first voltage amplifier 191. Then, the popcorn noise can be distinguished from a signal that induces a human movement. If the output signal of the second voltage amplifier 192 has an amplitude higher than a predetermined level, the popcorn noise detector 194 outputs a popcorn noise detection signal to the controller 195. When the controller 195 receives the popcorn noise detection signal, it outputs an output control signal to the output circuit 193 at a predetermined time. When the output circuit 193 receives the output control signal from the controller 195, it changes an analog output signal so that a predetermined signal different from the output signal from the first voltage amplifier 191 is supplied. FIG. 56 is a timing chart for illustrating the operation of the infrared detector. In the example shown in Figure 56, the output signal (a) of the I / V converter 2 has a first change due to the human body (1) and a second change due to the popcorn noise (2 ). Fig. 56 also shows the waveform of the output signal (b) of the controller 195 and the voltage (c) of the analog output in the output circuit 193. When the controller 195 outputs a control signal, the controller 195 changes the analog output to an internal reference voltage VRE F supplied from a reference voltage source 196. The output signal from the thermoelectric element 1 is usually weak, and the gain at the I / V converter 2 and at the first voltage amplifier 191 will be set to be very high. Then in the normal state or when no signal is received, the analog paper is used in the paper standard to make the country's national rate (cns) A4 rule (2 丨 0x297 mm) (Please read the precautions on the back before filling in this tile )

Order V Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -53- A7 B7 V. Description of the invention (51) (Please read the notes on the back before filling out this ear) The output noise produced cannot be ignored. On the other hand, when the internal reference voltage V R E F is output at the analog output, the noise in the signal is negligible compared to the corresponding part in the general state. Therefore, if the output is monitored with higher precision than the noise amplitude of the output in the normal state, the change from analog output to VR E F can be discriminated. That is, the generation of popcorn noise can be confirmed based on the analog output of the infrared detection device. In addition, when the infrared detector circuit is made into an integrated circuit, when the integrated circuit is checked by inputting a signal similar to popcorn noise, the internal reference voltage VRE F can be monitored at the analog output terminal. However, there is no need to provide a base for the VR E F terminal, and the integrated circuit is delicately manufactured. Another example of the infrared detector of the twentieth embodiment, which is printed by the K-Work Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, will be described below with reference to FIGS. 5 7 and 5 8. The structure of the infrared detector is similar to that shown in FIG. 5 except for the reference voltage source 196. In this example, a ground potential (GND) is supplied to the output circuit 193. When a popcorn noise occurs, as shown in FIG. 58 (c), the output circuit 193 changes the analog output of the input signal from the first voltage amplifier 1 9 1 to the ground potential, and the controller 19 5 outputs the control signal . The ground potential is the most stable voltage = because it is commonly found in infrared detector circuits, infrared detectors are considered small circuits. Different examples of the infrared detector of the twentieth embodiment will be described below with reference to FIGS. 59 and 60. The structure of the infrared detector is similar to that shown in FIG. 5 but an external supply voltage VDD is supplied from an external power source 197 to the output circuit 193. When a popcorn noise occurs, as shown in Figure 6 0 -54- This paper size applies the Chinese National Standard (CNS) A40 grid (210X297) 嫠 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -55- 4 Π0 -73 A7 B7 V. Invention description (52) (c) shows that the output circuit 193 changes the analog output of the input signal from the first voltage amplifier 191 to the external supply voltage VDD, and the controller 9.5 outputs control Signal. The external supply voltage VDD is supplied by the power supply for infrared detector 197. Because the analog output changes to the external supply voltage VDD, but the analog output usually does not exceed the internal supply voltage VCC (< VDD), the operation changes More Reliable "Another different example of the infrared detector of the twentieth embodiment will be described with reference to Figs. 6 1 and 62. The structure of the infrared detector is similar to that shown in Fig. 5 but an oscillator 1 9 8 is connected to the output circuit 1 9 3 to supply an oscillating signal. When a popcorn noise occurs, as shown in FIG. 6 2 (c), the output circuit 1 9 3 sends the input voltage from the first voltage amplifier 1 9 1 Analog output changed to Oscillator 1 9 8 The controller 1 9 2 outputs the control signal. Because the dedicated oscillator 1 9 8 is used, the analog output has a voltage that does not generate errors and the operation becomes more reliable. The oscillation signal can be used for the analog output of the infrared detector. The connection circuit of the terminals is also advantageous. The infrared detector of the twenty-first embodiment will be described with reference to FIGS. 6 3 and 6 4. As shown in FIG. 6, the infrared detector includes a pyroelectric element 1 and an I / V converter 2, a first voltage amplifier 20 1, a second voltage amplifier 2 0 2, an output circuit 2 0 3, a popcorn noise detector 2 0 4, a controller with an analog output terminal 2 0 5. The output circuit 2 0 3 has a switch. When the popcorn noise detector 2 0 4 outputs a popcorn detection signal and the controller 2 0 5 outputs a control signal, the switch is turned off at a predetermined time. β As shown in Figure 61 (c), when a jade paper size is applicable to the Chinese National Standard (CNS) Α4 size (210X297 mm) (Please read the precautions on the back before filling out this page)

A7 B7 5. Description of the invention (53) When the popcorn noise occurs, the controller 2 0 5 supplies a control signal to open the switch in the output circuit 1 93. Because the switch is open, the analog output via the switch output changes to have a high impedance. Opening the switch is one way to achieve a high impedance state. When the output signal of the output circuit 193 has a high impedance, the user can set the analog output terminal to a desired voltage, for example, to pull down or pull up the voltage of the analog output terminal. Then * identify the generation and output of popcorn noise. Although the present invention has been fully described in conjunction with its preferred embodiments and with reference to the accompanying drawings, it should be noted that various changes and modifications will be apparent to those skilled in the art. Such changes and modifications shall be deemed to be included in the scope of the present invention as defined by the scope of the attached application patent, unless they deviate from them. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -56- This paper size is applicable to China National Standard (CNS) A4 (210X297 mm)

Claims (1)

4 \ Τ〇73 abI C8 D8 VI. Patent application scope 1. An infrared detector comprising:-a thermoelectric element; a current-to-voltage converter that converts the current from the thermoelectric element into a voltage signal; and a signal processor It only performs waveform analysis on the voltage signal received from the current-to-voltage converter when the waveform generated by the human body is detected by waveform analysis. 2. The infrared detector according to item 1 of the patent application, wherein the signal processor includes: an amplifier that amplifies the voltage signal received from the current-to-voltage converter; a frequency analyzer that performs a frequency analysis on the output signal of the amplifier ; And a judgment circuit for detecting a waveform generated by a human body based on a frequency component obtained by a frequency analyzer. 3. The infrared detector according to item 1 of the patent application range, wherein the signal processor includes:-a first amplifier that amplifies the voltage signal received from the current-to-voltage converter in a frequency range:- The voltage signal received by the voltage converter is amplified by a second amplifier in a frequency range different from that of the first amplifier; and a judging circuit for detecting a waveform generated by the human body based on the amplitude level ratio of the output signals of the first and second amplifiers . 4. The infrared detector as described in the first item of the patent application scope, wherein the signal processor includes: 夂 Paper method scale applicable to China National Standards (CNS) A4 * Jt grid (210x297 male; t) ---'-- --.-----------, 17 ------% ^ (-Read the note of benefit and fill in the A 'wood page) -57- Α8 Β8 C8 D8 六 、 The scope of the patent application is a first amplifier that amplifies the voltage signal received by the current-to-voltage converter in a frequency range: a voltage signal received by the current-to-voltage converter is in a frequency range different from the first amplifier The second amplifier of the middle amplifier: a first comparator that compares the output signal of the first amplifier with the first threshold level: a second comparator that compares the output signal of the second amplifier with the second threshold level: A judgment circuit for detecting a waveform generated by a human body by comparing signals with a second comparator. 5. The infrared detector according to item 1 of the patent application scope, wherein the signal processor includes: an amplifier that amplifies the voltage signal received from the current-to-voltage converter;-a frequency analyzer that performs a frequency analysis on the output signal of the amplifier A judgment circuit for detecting the waveform generated by the human body according to the time dependence of the frequency analysis result of the frequency analyzer " 6. If the infrared detector of the first patent application range, wherein the signal processor includes: Amplifier to amplify the voltage signal received by the current-to-voltage converter; a comparator that compares the output signal of the first amplifier with a threshold level: and—detected by the comparator. When the amplifier output exceeds the threshold level, it is based on the time and paper waves. Dimensions 遘 叼 中 女 困 家 梂 唪 i CNS) A4 Grid (210x297 male *) _ (-Please read the ^ back notice before filling out the wooden page) 4J70I3. ^ D8 VI. Judgment circuit for detecting the waveform generated by the human body within the range of the patent application. (Read the meanings on the back, ·: i, and then transcribe " S) 7. If the infrared detector of the first patent application scope, the signal processor includes: a signal received by the current-to-voltage converter A first amplifier that amplifies a voltage signal in a frequency range; a second amplifier that amplifies a voltage signal received from a current-to-voltage converter in a frequency range different from the first amplifier; compares the output signal of the first amplifier The first comparator with the first threshold level: a second comparator that compares the output signal of the second amplifier with the second threshold level; a measurement of the pulse width of the output signals of the first and second comparators and Circuit for judging the waveform generated by the human body based on the width of the wave "8. For example, the infrared detector of the first patent application range, wherein the signal processor includes an amplifier that amplifies the voltage signal received from the current-to-voltage converter : A judging circuit that measures the rise time of the output signal of the amplifier and detects the waveform generated by the human body based on the rise time The external line detector, wherein the signal processor includes: a first amplifier that amplifies the voltage signal received from the current-to-voltage converter with a first band pass filter characteristic, and the first band pass filter characteristic has Transmission belt center; Zhang Youdu Shi β * Girl S & Lee (CNS) A4 * t grid (2I0X 297 mm J ~ '! 〇73 A8 B8 C8 08 6. Application scope of patent-an output circuit An amplifier output signal and a predetermined threshold to output a detection signal; (-. ^ ¾Read the ..: ^ on the back of the page and write this page again) A second amplifier • It will receive the self-current-to-voltage converter The voltage signal is amplified by a second band pass filter feature, and the second band pass filter feature has a center of the transmission band at a second frequency higher than the first frequency; a popcorn noise detector that compares the output signal of the second amplifier with A threshold to output a popcorn detection signal; a controller that controls at least one current-to-voltage converter, a first amplifier, an output circuit, a second amplifier, and a popcorn noise detector to The popcorn detection signal of the flower noise detector prevents the controller from outputting a detection signal when it is received. 1 For example, the infrared detector of item 9 of the patent application scope, wherein when the When the popcorn detection signal is received, the controller reduces the gain of the current-to-voltage converter at a first predetermined time, and decreases the gain of the first amplifier at a second predetermined time longer than the first predetermined time. 1 1. For example, if the infrared detector of item 9 of the patent application is applied, when the popcorn detection signal from the popcorn noise detector is received, the controller reduces the gain of the current-to-voltage converter at the first predetermined time. To provide an output signal, which is used for a second predetermined time longer than the first predetermined time "1 2. The infrared detector of item 9 of the patent application range, wherein when the corn from the popcorn noise detector is corn When the flower detection signal is received, the controller reduces the gain of the first amplification _ at the first predetermined time, and prevents the output scale from flashing in accordance with the National Sample Standard (CNS) Six 4 Specification (210 > :: 297 mm}- 60- "-部 ^ 2 is a partial ^ ^: ^ operatives working consumption: '; ^ C8 D8 six projections 4Π〇73, the scope of patented circuit provides an output signal for a first predetermined time is longer than a second predetermined time. 13. The infrared detector according to item 9 of the scope of patent application, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller makes the current to the voltage converter's The gain is reduced, and the gain of the first amplifier is reduced at a second predetermined time longer than the first predetermined time, and the output circuit is prevented from providing an output signal for a third predetermined time longer than the second predetermined time. 14. The infrared detector according to item 9 of the patent application scope, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller makes the gain of the current-to-voltage converter at a predetermined time cut back. 15. The infrared detector according to item 9 of the scope of patent application, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller reduces the gain of the first amplifier at a predetermined time. 16. The infrared detector according to item 9 of the scope of patent application, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller reduces the output signal of the output circuit at a predetermined time. 17. The infrared detector according to item 9 of the patent application scope, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller prevents the first amplifier from receiving an input signal for a predetermined time . 18. The infrared detector according to item 9 of the scope of patent application | wherein when the popcorn detection signal from the popcorn noise detector is received, the controller makes the detection of the popcorn signal sensitive for a predetermined time Degree reduction. 1 9. If the infrared detector of item 9 of the scope of patent application, (-read the meaning of the ear on the back " " 'this page) The Winter Rider Zhang Zhidian Flashing China National Standards (CNS) A · »Specifications UIOX297 mm) -61-41 £ -Ministry ^^ 4 ^ Self-Working ^ Bone ^ Working Club Printing 4 ^ 0Τ3-C8 D8 Scope of patent application When the popcorn detection signal from the popcorn noise detector is received, the controller reduces the gain of the second amplifier at a predetermined time = 2 0. The detector, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller reduces the sensitivity of detecting the popcorn signal by increasing the threshold of the popcorn detector at a predetermined time. 2 1. The infrared detector according to item 9 of the scope of patent application, wherein when the popcorn detection signal from the popcorn noise detector is received, the controller controls the turn-out circuit at a predetermined time to output a A signal different from the output signal of the first voltage amplifier. 2 2. The infrared detector of item 21 of the scope of patent application, wherein the infrared detector is made into an integrated circuit, and the signal different from the output signal of the first voltage amplifier is a reference potential. 2 3. If the infrared detector of item 21 of the scope of patent application, the signal different from the output signal of the first voltage amplifier is the ground potential of the infrared detector circuit. 24. If the infrared detector of item 21 of the patent application scope includes an external power source for driving the infrared detector, a signal different from the output signal of the first voltage amplifier is supplied from the external power source to the control. Device potential. 25. If the infrared detector of item 21 of the patent application scope further includes an oscillator, an output signal of one of the oscillators is supplied to the controller, and a signal different from the output signal of the first voltage amplifier is the oscillator. The output voltage. (-• 一 -Read the ^ Matters on the back of the page and fill in the + -this page) Set the AI paper size and apply the Chinese National Standard (CNS) A4 specification (210x297 male *) -62- A8 B8 C8 D8 6. Apply for a patent Range 2 6. The infrared detector of item 21 of the patent application range, wherein the controller includes a switch for supplying a detection signal, and the popcorn detection signal from the popcorn noise detector is received. At this time, the output signal of the switch has a high impedance at a predetermined time. (-Read the precautions on the back before filling in this page) 伕 The size of the paper is suitable for the Chinese country oak (CMS) Α4ΐ ^ (210X297 mm) -63-