JPS61125696A - Wireless transmitter - 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] [Technical Field 1] The present invention receives a contact output such as a relay contact, a Hiro output, or a switch output of a sensor, and operates when this contact input changes to transmit a change detection signal. The present invention relates to a wireless transmitter equipped with a 5& signal circuit.

[Back electricity technology 1] In general, contact outputs such as relay bonds and α outputs of sensors such as fire detection sensors, space detection sensors, and security sensors, and switch outputs such as emergency switches and call switches are input; In this type of wireless transmitter equipped with a transmission circuit that operates when the contact input changes and transmits a change detection signal, transmission control controls the operation of the transmission circuit by detecting whether or not the contact input has changed. When a means is formed using a CPU, the input board is accessed at regular intervals to check the state of the contact input, and it is confirmed that the state at the time of the previous access and the state at the time of the current access have changed. In this case, the transmitting circuit is operated for a predetermined period of time to transmit a predetermined change detection signal. However, in such a conventional example, since the secretion circuit was controlled by detecting changes in the contact force manually, the response speed became slow and the configuration of the transmission control means became FJI. Top, high-controversial parts (CP
There was a problem in that it required ``U nato''.

1. Purpose of the Invention [The present invention has been made in view of the above points, and its purpose is to provide a wireless transmitter that has a high response speed (and is simple in configuration and low in cost). be.

[Disclosure of the Invention 1 (Embodiment 1) Fig. 1 - Fist φ shows one embodiment of the present invention, and shows the output contact 1 of the sensor. In addition, there is an input circuit 2 that converts the state of a contact l such as a switch output into a voltage signal to form an input signal ■, a latch circuit 3 that latches the input signal v1 when a rough clock ■ is input, and an input signal A comparator circuit 4 consisting of an exclu-knob off circuit that compares V and latch circuit 3 output ■ and outputs an input change signal ■ when they do not match, and a latch clock ■ that delays the input change signal ■. The transmission control means is composed of a delay circuit 5 consisting of a time constant circuit CR and a Shemitt trigger circuit ST, and a monostable multivibrator 6 that is triggered by the input change signal and sets the operating time of the transmission circuit 8. 7 was formed. Here, the transmission circuit 8 consisting of the transmission signal forming circuit 8a and the modulation circuit 8b is connected to the output V of the monostable multivibrator 6 of the transmission control element Fi7. Ix source supply is td
The latch circuit is configured to transmit a change detection signal (2) based on the latch circuit 3 output V, , (2) when power is supplied.

The operation of the first embodiment will be specifically explained below. Now, when the output V of the latch circuit 3 is "L", when the output contact 1 is turned on and the input signal "■" output from the input circuit 2 becomes "H", the comparator circuit 4 When the input signal ■ and the latch circuit 3 output ■ do not match, the input change signal ■ is output from the comparator circuit 4.
, becomes "H", and the monostable multipipe rake 6 is triggered. On the other hand, in the delay circuit 5, this input change signal ■
, is delayed by a certain period of time to form another clock ■s, and by this rough clock ■, the input 4J No. 1 is latched into the second circuit 3, and the output V of the latch circuit 3 is set to H@. Ru. By the way, the output 6 of the monostable multivibrator 6 supplies power to the 2nd oscillation circuit 8 for a certain period of time set in F, and the stirrup circuit 8 is activated. The pulse width of the power supply control pulse generated by the change detection signal■,
It is set slightly longer than the required transmission time. Here, the transmission signal forming circuit 8a of the transmission circuit 8 forms a transmission signal based on the output V3 of the latch circuit 3 at a predetermined timing, and the modulation circuit 8b modulates the carrier wave with this transmission signal. A change detection signal V8 is transmitted. FIG. 2 is a time chart showing the operation of the transmission signal forming circuit 8a.
1 at the specified reset from the ILt point to when the power is turned on.
After 711 To, scan outputs 81 to 86 are sequentially output at fixed time intervals T1, and in synchronization with S, , S, outputs ■1, ■ of the launch circuit 3 are output to the transnoster Q1.
, Q, as a scan input. As shown in FIG.
, ~r, in the data signal Vd in time series'
This is an FSK signal that transmits data using RIII signals, and in the embodiment, it is a 4-bit signal to prevent interference.
~ B5 harassment code, type of output contact 1 (fire detection, crime prevention, emergency, call, etc.) and contact status! I (on,
6-bit data consisting of a data code of 2 bits B, , B, indicating OFF) is transmitted, and when transmitting with a change detection signal A no-signal period corresponding to 2 bits is provided.

In addition, the change detection signal emitted from the wireless transmitter■
, is received by the wireless reception fi (not shown), and the wireless receiver checks whether the house codes B2 to B match, and if they match, the data hoods B, -8,
Based on this, the load corresponding to output contact 1 is controlled (blinking of an indicator light, generation of a warning sound by a speaker, etc.) (Actual power example 2) Figure 4 shows an example of a pond. and the output v of the delay circuit 5
In step 5, the constant multivibrator 6 was turned on, and the structure of the pond is exactly the same as in the first embodiment.

Now, in the second embodiment, if there is no input change for a time exceeding the time constant of the delay circuit 5, the single stable multivibrator 6
Since the trigger is not bent, no unnecessary change detection signal (2) is transmitted due to noise or chattering of the output contact 1, and malfunction can be prevented.

[Effect of the Invention 1] As described above, the present invention receives a contact output such as a relay contact output or a switch output of a sensor, and when this contact input changes, it automatically operates and sends a change detection signal.5 !
! Wireless transmission (!1flft) is equipped with an input circuit that converts contact input into a voltage signal to form an input signal, a latch circuit that latches the input signal when the latch clock is input manually, and an input signal. and the latch circuit output, and a comparison circuit that outputs a human power change signal when there is a discrepancy, and a latch circuit that delays the human power change fJ.
and a delay circuit that forms a trif
The transmission control means is formed by a monostable multivibrator which sets the operating time of the transmission circuit.Since the transmission control means is formed by hardware, the response speed is fast (and it is not as fast as the conventional example). This has the advantage that the configuration is simpler and the cost is lower than when a CPU is used to form the structure.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, diagram l'12 and 3U! J is an explanatory diagram of the same operation as above, and diagram #44 is a schematic configuration diagram of another embodiment. 1 is a contact, 2 is an input circuit, 3 is a latch circuit, 4 is a comparison circuit, 5 is a delay circuit, 6 is a monostable multivibrator, 7
is a 51-signal control means, and 8 is a 2-signal circuit.

Claims (1)

[Claims] (1) A wireless transmitter that receives a contact output such as a sensor's relay contact output or switch output, and is equipped with a transmitting circuit that operates when the contact input changes and sends out a change detection signal. An input circuit that converts the input signal into a voltage signal to form an input signal, a latch circuit that latches the input signal when a latch clock is input, and a latch circuit that compares the input signal and the latch circuit output and generates an input change signal when there is a mismatch. A comparison circuit that outputs a signal, a delay circuit that delays the input change signal to form a latch clock, and a monostable multivibrator that is triggered based on the input change signal and sets the operating time of the transmitter circuit form the transmission control means. A wireless transmitter characterized by: