JPS5862792A - Hot wire detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is applicable to a crime prevention device, etc. that detects the heat rays emitted from the person's body temperature and issues an alarm when there is an unattended illegal intruder at night. I wonder about the fever detection device that can cause eyebrows.・Such a device is common! - A pyroelectric ll01111 detector is placed at the focal point of the hot ray focusing mirror, and the detector is connected to the gate of a field effect transistor formed integrally with the detector. However, even if the heat S incident on the detector changes due to fluctuations in the air within the field of view of the focusing mirror, an input is applied to the above transistor, causing an increase in operation. By connecting the elements in series with opposite polarity to form a 1') 0 detector - and placing the two elements as far apart as possible, II! However, it is difficult to reduce this, but it is difficult to reduce this. The present invention uses this method to prevent the malfunction of the heat ray detection device by Haraen.-1 By using this together with the configuration of the detector as described above,
Occurrence of malfunction - It is intended to keep the temperature extremely low. By arranging the heat ray sensitive elements L1 and LI, for example, the heat rays incident from above are connected to the heat rays II#i element 1 (as shown in Fig. 6), and the heat rays incident from above are The heat rays incident on the element S from below KiI as shown in the chain and the heat rays incident from below as shown by the dotted line are respectively focused on the element 4.1.
In the Moum arrow view of No. 11I Catfish No. A11K, one's own elements 1 and 4 and I and L are connected in series with opposite polarity, respectively, and the heat 11 @ heat binding detection 5110 and 11 are fII.・As shown in Fig. S, a pair of λ field effect resistors 11 is integrated with the above-mentioned detection device 110. mm) and connect the source of it to the load resistor 1411m11 and the force terminal ILl? #, connect the drain to the power supply terminal 11, and then connect the cllh
The figure shows output terminals 1g and l'7. An example of the configuration of an electrical open circuit is shown below, and the signal at terminal 1-917 is amplified by -Le, t.

By amplifying them respectively and performing waveform shaping, when a signal of a predetermined level or higher is added, 1
-) pulses are sent to the IMI.

Add Jin's pulse to timer n and mu and set appropriate Ichinoseki width>au
Therefore, if there is an overlapping part in the rectangular wave sent out from timer 2s and number 1, outputs from gate l* are sent out and detected by the output of number 1. ! ! -operates- The above-mentioned device is used, for example, in a room a! If it is used for crime prevention by being attached to a surface, etc., the field of view of the concave mirror 1 is directed in the direction expected to be the passage of illegal intruders during nighttime hemorrhoids. When using this device, if the temperature of the object in iLw changes due to a change in air temperature, the temperature of all the objects in IIWt will change at the same time. Breath, easy, 4. It sends out an output. However, since the L-detection, I-1O, and XIFi elements 2, 4, and 3 are connected in series with opposite polarities, the outputs of each element overlap each other, resulting in the transistor 1g.

ls day) (zld signal 1 is not applied. Therefore, the detector j1a maintains the inactive state.

When a person enters the above-mentioned field of view, the heat generated by that person's body temperature is focused by the four-sided mirror L at the focal point of A. However, if the intruder moves as shown by the arrow XV in Fig.
4 and 5, etc., and finally 11#l: Injects only to IA. In this way, (heat Is#i enters each element sequentially and generates an output, but - each detects one #10 and #1.) ill
2 and 4, and 1 and 1, which form , are equal to each other as mentioned above, and since the heat radiator is relatively small %Ptt, the probability that heat is incident on them at the same time is sufficiently small, Assuming that they are incident simultaneously, the time is dgi time.Therefore, detection@10 and 11 send out outputs, and the outputs are applied to the gates of field effect sound transistors l and ls.
A signal is also sent out from terminal 11.1. ζO signal is 4
Figure amplification 11198! ! One-carved shaping circuit J like the circuit (for example, Schmidts) via O! l, jJlK are added, but depending on the heat capacity of elements x, s, . . . ll
In order to have a width m at the time of output voltage II, the shaping circuit λl-
Breath output signals @flies usually have a superposition. For example, there is a sufficiently steep ψ time constant ff1R1 circuit as required, and Ih is a monostable circuit that sends out an output with an appropriate time width! In addition, the above-mentioned shaping circuits al, RJ! In addition to the output of this timer is.

By adding the output of j4 to the AND gate ■, an output signal is almost certainly sent from the 1-AND gate 2a. This signal activates the detection H2m and detects that there is an intruder within the field of view of the focusing mirror. In addition, the second figure is a view from #11@1) Mu in another embodiment of the present invention, and the element 5 in FIG. 2 is omitted. Section 6- is the circuit diagram of Totenji
lx is formed using only one element. Therefore, the above inspection! The 4-channel generator 11 sends out a ton output due to a change in temperature O, but since the test tube 110 does not send out an output, it is output from the AND gate 2 in Figure 4, and no power signal is sent tH.
For this reason, the detection W2-maintains a non-operating state against changes in the office temperature. 111 in still another embodiment of the present invention, and FIG. 8 shows the transistor xz
, xs circuit. In other words, in this case, the fifth
The numbers in the figure are also omitted, and the detectors 10 and 11 are constructed from only the different elements 2 and 3. Therefore, changes in temperature may cause the detector 2 to operate.
However, in cases where there is no risk of sudden changes in temperature, this simple configuration can be used.

As described above with respect to the embodiments, the present invention provides a plurality of pyroelectric heat ray detectors at the focal position of a heat ray focusing mirror such as a concave mirror
By arranging the detector z O# 11, etc., and connecting the famous detector to the input end of each separate amplifier circuit consisting of the transistor 12 or 13, etc., each increase el! The heat ray detector t- is set to operate when the path a sends output at the same time. In such a device W, for example, transistor 1ff
Terminal 1 due to noise components of gate leakage current of I and I
A division signal may be sent from 6 or 17. L#
The probability that large noise voltages are generated simultaneously from multiple circuits is extremely low. Therefore, malfunctions caused by the noise voltage in the intensifier path can be reliably prevented. In this case, multiple detectors 10 are used as described above.
．． Outputs are simultaneously sent from the 11 hemorrhoids, and the inspection II failure is activated. and at least one of the detectors is connected in series with opposite polarity to two thermal ray-sensitive elements 2 with opposite polarity.
, 4, etc., and by arranging these elements as far away as possible from the focal position of the Tokyo O, malfunctions due to changes in temperature can be prevented at the same time.

[Brief explanation of the drawing]

1 [Figure 1 is a diagram of the optical 4I configuration of the #i example of this invention, a Moum arrow view of Figure 1 of II Hawk Figure IIi, and Figure 1 is the second
The circuit diagram of the detector in Figure #C, Figure 4 is a diagram showing an example of the configuration of a device that can apply false force in Figure si, and Figure 1155 shows a part of Figure S1 and -1 in another embodiment IIc. Figure IF5 is the circuit diagram of the detector in Figure 1, Figure 1 shows the same parts as Figure 1 in Figure 1, and Diagram 1m in the other 0 embodiments.
01 is the circuit diagram of the detector shown in Figure 1 of Zusha. Heat ray sensor, ff1lll is a shaping circuit, !, 24 is a tie!, xsi #i An F gate,
! ! 6 is a detector.

Claims (1)

[Claims] (1) Multiple pyroelectric @heat ray detection quantities are placed at the focal position of the heat ray focusing mirror, and each detector is separated from the λ of a separate amplifier circuit.
A heat ray detection device characterized by having a heat ray detector that operates electrically when connected and each of the 11 amplifier circuits sends out an output at the same time. Claims claim: 1. One pyroelectric heat ray sensitive element "C" is connected to the heat ray focusing mirror O, and each of said one element is arranged at a sufficiently separated position at the focal position of the heat ray focusing mirror O. 11$1(x)l
[Heat ray detection device described